CDMA1X BSS Network Planning Parameter Configuration …alfin.dosen.st3telkom.ac.id/wp-content/uploads/sites/8/2015/12/... · Abis interface between BTS and BSC BTS ... This guide

Document No. Product name CBSCV100R003C03

Applicable for Customer Product name

Drafted by Document version V1. 2

CDMA1X BSS Network Planning Parameter Configuration Guide

Prepared by: Network planning Dept. Date: August, 2004

Reviewed by: Network planning Dept. Date: August,2004

Reviewed by: Date:

Approved by: Date:

Huawei Technologies Co., Ltd. All rights reserved

CDMA1X BSS Network Planning Parameter Configuration Guide _V Confidentiality level

2004-12-09 All rights reserved Page 2 of 283

Table of Contents 1. FORWARD.................................................................................................................................................. 7

1.1 ABOUT THIS DOCUMENT...................................................................................................................... 7 1.2 TABLE OF PARAMETERS RELATED TO NETWORK PLANNING............................................................ 8

2. FORWARD POWER ALLOCATION PARAMETERS ................................................................... 10 2.1 SECTOR CARRIER PARAMETERS (PILOT) ........................................................................................ 10 2.2 PILOT CHANNEL PARAMETERS (PILOT_CH)................................................................................... 12 2.2 SYNC CHANNEL PARAMETERS (SYNC_CH) .................................................................................... 13 2.3 PAGING CHANNEL PARAMETERS (P_CH) ......................................................................................... 14 2.4 QUICK PAGING CHANNEL PARAMETERS (QP_CH) ......................................................................... 15

3. RECOMMENDATIONS FOR POWER CONTROL PARAMETER CONFIGURATION....... 19 3.1 DESCRIPTIONS OF SPECIAL REPRESENTATION................................................................................ 19

3.1.1 Reverse Outloop Set Value................................................................................................... 19 3.1.2 Forward Channel Transmit Power ...................................................................................... 20 3.1.3 Eb/Nt Set Value of Forward Fast Power Control ............................................................. 21 3.1.4 Representation of FER........................................................................................................... 21

3.2 BSC-LEVEL POWER CONTROL PARAMETERS (BSCPWR) ............................................................ 21 3.3 REVERSE CLOSED LOOP POWER CONTROL PARAMETERS (RCLPC) ........................................... 26 3.4 FORWARD SLOW POWER CONTROL PARAMETERS (FSLOWPC)................................................... 45 3.5 FORWARD EIB POWER CONTROL PARAMETERS (FEIBPC) .......................................................... 55 3.6 FORWARD FAST POWER CONTROL PARAMETERS (FFASTPC)...................................................... 59 3.7 TARGET FER (FER) ........................................................................................................................... 79

4. HANDOFF PARAMETERS .................................................................................................................. 85 4.1 MODULE HANDOFF PARAMETER (MHOPARA) .............................................................................. 85 4.2 HANDOFF PARAMETERS (HOPARA) ................................................................................................ 94 4.3 PILOT HANDOFF ALGORITHM SWITCH PARAMETERS (PHOALG) ............................................... 107 4.4 SAME-FREQUENCY HARD HO PARAMETERS (HHOSAMEFREQPARA) ................................. 110 4.5 CANDIDATE PILOT SEARCH CONTROL PARAMETERS (CFSCPARA)........................................... 113 4.6 MOBILE ASSISTED HARD HANDOFF PARAMETER (HHOMAHHOPARA) ................................. 121 4.7 HANDDOWN HARD HANDOFF PARAMETER (HHOHANDDOWNPARA)..................................... 125 4.8 DIRECT HARD HANDOFF PARAMETER (HHODIRECTPARA) .................................................... 127 4.9 PILOT BEACON HARD HANDOFF PARAMETERS (HHOPILOTBEACONPARA) ........................ 128 4.10 PILOT MEASUREMENT REQUEST PARAMETERS (PMROPARA) .................................................. 130

5. CHANNEL ASSIGNMENT .................................................................................................................... 133 5.1 CHANNEL INFORMATION (CH_INFO) ............................................................................................... 133 5.2 SCH ASSIGN PARAMETERS (SCH_PARA) .................................................................................... 143 5.3 CHM MODULE PARAMETERS (MCHM)............................................................................................ 159 5.4 SERVICE REDIRECTION PARAMETERS (SR_CFG) .......................................................................... 182

6. SYSTEM MESSAGES ........................................................................................................................... 187 6.1 SYNCHRONIZATION CHANNEL MESSAGE (SCHM) ............................................................................ 187 6.2 SYSTEM PARAMETERS MESSAGE (SPM) ............................................................................................ 190 6.3 SYSTEM MESSAGE CONTROL PARAMETERS (SYS_MSG_CTRL_INFO) ....................................... 203 6.4 ACCESS PARAMETER MESSAGE (APM) .............................................................................................. 207 6.5 ACCESS CHANNEL PARAMETERS (A_CH)........................................................................................... 221 6.6 EXTENDED SYSTEM PARAMETER MESSAGE (ESPM) ....................................................................... 223 6.7 NEIGHBOUR LIST MESSAGES (NLM) .................................................................................................. 237 6.8 GLOBAL SERVICE REDIRECTING MESSAGES (GSRDM) .................................................................. 238 6.9 EXTENDED CDMA CHANNEL LIST MESSAGES (CCLM) .................................................................. 242 6.10 EXTENDED GLOBAL SERVICE REDIRECTION MESSAGES (GSRDM)............................................ 244 6.11 GLOBAL NEIGHBOR LIST MESSAGE (GNLM) .................................................................................. 247

7. BTS CELL ATTRIBUTE PARAMETERS ........................................................................................... 251



7.1 SET BTS REVERSE CHIP PROCESSING PARAMETERS (SET_BTSREVCHP) ........................... 252 7.2 SET BTS CELL PARAMETERS (SET_BTSCELLPARA) ............................................................... 256

8. LOAD CONTROL PARAMETERS ................................................................................................... 261 8.1 FORWARD LOAD CONTROL PARAMETERS (FWD_LOAD_CTRL_PARA) .................................. 261 8.2 REVERSE LOAD CONTROL PARAMETERS (REV_LOAD_CTRL_PARA) .................................... 269 8.3 ACCESS LOAD CONTROL PARAMETERS (ACH_LOAD_CTRL_PARA)....................................... 275 8.4 SERVICE RESOURCE MANAGEMENT PARAMETERS (BSCRSM).................................................. 278

9. TCP OPTIMIZATION PARAMETERS............................................................................................ 280



Table of Table Descriptions

TABLE 2-2 QUICK PAGING CHANNEL POWER OFFSET ......................................................................................... 17 TABLE 3-1 TARGET FER ..................................................................................................................................... 21 TABLE 4-1 SEARCH WINDOW SIZE....................................................................................................................... 94 TABLE 4-2 HANDOFF REMOVAL TIMER EXPIRATIONS ........................................................................................ 100 TABLE 4-3 THE RELATION BETWEEN PARAMETER VALUE AND PERIOD............................................................. 120 TABLE 6-5 REDIRECTION ACCESS OVERLOAD LEVEL........................................................................................ 239 TABLE 6-6 REDIRECTION RECORD TYPES ......................................................................................................... 242 TABLE 6-9 SEARCH MODES ............................................................................................................................... 247 TABLE 7-3 MEANINGS OF VALUES OF THE PARAMETER.................................................................................... 261



CDMA1X BSS Network Planning Parameter Configuration Guide

Keywords: cdma2000, BSS, radio resource management, forward channel power

distribution, power control algorithm, handoff algorithm parameter, channel

assignment, system message and BTS cell attribute parameter, load control

parameter, and TCP optimization parameter.

Abstract: This document gives an in-depth principle description of the relevant

parameters in cdma2000 network planning, suggestions on parameter

configurations, and advantages & disadvantages of different

configurations. It provides references for network optimization engineers

to make the best of these radio resource management algorithms to

optimize the network coverage, network capacity and performances of

traffic measurement indices. The specific parameters include forward

channel power distribution, power control algorithm, handoff algorithm,

channel assignment, system message and BTS cell attribute.

Abbreviations list: Abis interface between BTS and BSC

BTS Base Tranceiver System

BSC Base Station Controller

CDMA Code Division Muti Access

ECAM Extended Channel Assignment message

Ec/Io Pilot energy accumulated over one PN chip period (Ec)

to the total power spectral density

(Io) in the received bandwidth

Ec/Ior

EIB Erase Indication Bit

ESCAM Extended Supplemental Channel Assignment Message

FCH Fundamental Channel

FER Frame Error Ratio



FMR Frame Processing Board

FW TFC Forward Traffic Channel

MS Mobile Station

NUM_RSCCH Number of Reverse Supplemental Code channel

OMU Operation Maintenance Unit

PMRM Power Measurement Report Message

RC Radio configuration

Rx Received Power

RV TFC Reverse Traffic Channel

SCH Supplemental Channel

SCCH Supplemental Code Channel

SPU Signal Processing Unit

SDU Selection/Distribution Unit

Tx Transmit Power



[Announcement]:

This guide is used by Huawei customer of relevant products. The customer must

abide by non-disclosure agreement and illegal transfer and retransmission are

prohibited. Huawei reserves the copyrights.

1. Forward

1.1 About this Document In this guide, the corresponding BSC version is 100R003C03

The fields about parameters in this guide are shown below:

[Type] This field specifies the type of a parameter: An algorithm parameter or a Um

interface parameter. For a Um interface parameter, the system messages that

contains the parameter are also given.

[Range and unit] This field specifies the range of the parameter. The value range is closely

related to the data structure.

[Operating range] This field suggests the allowable adjustment range of the parameter in

practice. Modify the parameter within the above available range during the network

optimization.

[Recommended value] It is a commonly used value, but not always applicable in any case. In

combination with the practical requirement, refer to the description of “Setting

tradeoffs” to define the value of the parameter. If the default value is inconsistent

with recommended value in this guide, the recommended value prevails.

[Setting tradeoffs] This field means the effect that will be caused if the value of the parameter

increases or decreases on the basis of the recommended value.

This guide only provides references for parameter setting.

The representations and conversion methods between parameters related to

power control and forward power distribution are all listed in 3.1. The symbol Ec/Io is

the same as Ec/Io, so does for Eb/Nt and Eb/Nt.



1.2 Table of Parameters Related to Network Planning

SN Type SQL table name Configuration items

Dynamic configuration

command

1 Sector carrier gain parameter

PILOT RF gain and sector gain MOD CDMACH

2 PILOT_CH Pilot Channel Gain MOD PLTCH 3 SYNC_CH Sync Channel Gain MOD SYNCH

4 P_CH Paging Channel Gain (configured according to paging channel No.) and Broadcast MODE

MOD PCH

5

Common channel

parameter

QP_CH

Number of Quick Paging Channels, Quick Paging Channel Rate, CCI Modulation Symbol Relative Power Level, and Relative Power

Level of PI Modulation Symbol

MOD QPCH

6 BSCPWR BSC-level power control parameters MOD BSCPWR

7 RCLPC Reverse Closed Loop Power Control Parameters

MOD RCLPC

8 FSLOWPC Forward Slow Power Control Parameters MOD FSLOWPC

9 FEIBPC Forward EIB Power Control Parameters MOD FEIBPC

10 FFASTPC Forward Fast Power Control Parameters MOD FFASTPC

11

Power control

FER Target (FER) Configuration MOD FER

12 MHOPARA Inter-BSC Handoff Parameters MOD BSCHO

13 HOPARA Handoff parameters MOD HO

14 PHOALG Pilot Handoff Algorithm Switch Parameters MOD PHOALG

15 CFSCPARA Candidate Pilot Search Control Parameters MOD CFSC

16

Handoff

HHOMAHHOPARA

Mobile Assisted HHO Parameters MOD HHOMA



17 HHOHANDDOWNPARA

Handdown HHO Parameters MOD HNDDWN

18 HHODIRECTPARA Direct HHO Parameters MOD DRCT

19 HHOPILOTBEACONPARA

Pilot Beacon HHO Parameters MOD HHOBPLT

20 PMROPARA Pilot Measurement Request Parameters MOD PMRO

21 SFNBRPILOT Same Frequency HO Relation

ADD NBRCDMACH, RMV NBRCDMACH, LST NBRCDMACH , MOD SFNBRCDMACHP

22 DFNBRPILOT Different Frequency HO Relation

ADD NBRCDMACH, RMV NBRCDMACH, LST NBRCDMACH, MOD DFNBRCDMACHP

23 NBRPILOT Idle HO Relation

ADD NBRCDMACH, RMV NBRCDMACH, LST NBRCDMACH, MOD NBRCDMACHP

24 HHOHANDDOWNTARG

HANDDOWN Hard HO Target Carrier

ADD HNDDWNTRG, RMV HNDDWNTRG, LST HNDDWNTRG, MOD HNDDWNTRG

25

HHODIRECTTARG

Direct Hard HO Target Carrier

ADD DRCTTRG, RMV DRCTTRG, LST DRCTTRG, MOD DRCTTRG

26 Channel CH_INFO Channel Information MOD CHINF



27 SCH_PARA SCH Allocation Parameters

MOD LOADCTRLPAR

A

28 MCHM Module-Level Channel Management Parameters

MOD MCHM

29

management

SR_CFG Service Redirection Parameters MOD SRCFG

30 SCHM Synchronization Channel Messages MOD SYNCMSG

31 SPM System Parameter Messages MOD SPM

32 SYS_MSG_CTRL_INFO

Overhead Message Control Parameters

MOD SYSMSGCTRL

33 APM Access Parameter Messages MOD APM

34 A_CH Access Channel parameters MOD ACH

35 ESPM Extended system parameter message table

MOD ESPM

36 NLM Neighbor List Messages MOD NLM

37 GSRDM Global Service Redirection messages MOD GSRDM

38 CCLM Extended CDMA Channel List Messages MOD ECCLM

39 EGSRDM Extended Global Service Redirection Messages

MOD EGSRDM

40

System message

GNLM General Neighbor List Messages MOD GNLM

41 FWD_LOAD_CTRL_PARA

Forward Load Control Parameter MOD FLDCTRL

42 REV_LOAD_CTRL_PARA

Reverse LOAD control Parameters MOD RLDCTR

43 ACH_LOAD_CTRL_PARA

Access Load Control Parameters MOD ALDCTRL

44

Load control

BSCRSM BSC-level RSM Parameters MOD BSCRSM

45 TCP parameter RLP BLOB TCP Optimization

Parameter MOD MAPARA

2. Forward Power Allocation Parameters

2.1 Sector Carrier Parameters (PILOT)



[Command name] MOD CDMACH (Base Station Controller Management\Configuration

Management\Cell Channel Management\Modify Sector Carrier Parameters)

TXGAIN (RF Gain) [Description] This parameter represents the attenuation (in dB) of the radio frequency gain.

[Type] Internal parameter of BTS

[Range and unit] 0~24 dB

[Operating range] 0~20 dB

[Recommended value] 0

[Setting tradeoffs] The value of this parameter depends on the required output power. The

maximum value should not exceed 20dB. To obtain a lower forward output power,

an external attenuator is recommended.

SCTGAIN (Baseband Gain) [Description] This parameter represents the baseband gain.

[Type] Internal parameter

[Range and unit] 0~4095

[Operating range] 500~3200




[Setting tradeoffs] The value of this parameter depends on the required output power. There is an

equation between set value and actual transmit power (P):

P=20*log (SCTGAIN / 3000) + 43 - TXGAIN (dBm).

From the above equation, we can obtain the values in the table below. Currently,

it is recommended to change the forward output power by using an external

attenuator and modifying the radio frequency gain, instead of the baseband gain.

Table 2-1 Relationship between sector gain (baseband gain) and output power Sector gain Output power(dBm)

3000 43

2500 41.4

2000 39.5

1500 37

1000 33.5

500 27.3

2.2 Pilot Channel Parameters (PILOT_CH) [Command name] MOD PLTCH (Base Station Controller Management\Configuration

Management\Algorithm Configuration\Cell Channel Configuration\Modify Pilot

Channel Parameters)

PLTCHGAIN (Pilot Channel Gain)

[Description]

This parameter represents the pilot channel gain in dB. From it, we can get the

percentage of the pilot channel power to the total power.

[Type]

Internal parameter

[Range and unit]

-255~0. (Unit: 0.25 dB) For the conversion method, refer to section 3.1.



[Operating range]

-40~-21, corresponding to 10% ~30%

[Recommended value]

-28

[Setting tradeoffs]

-63.75 ~ 0dB is represented by 0 ~225. Step: 0.25dB.The ratio of the pilot power to

the total transmit power of sector carrier should be set in consideration of the

capacity and coverage. If the transmit power assigned to the pilot channel is high,

the coverage area will be extended, but the power reserved for the traffic channel will

decrease, so the capacity will decrease, too. When the pilot channel gain is set high,

the forward link and reverse link must be balanced. In the densely-populated urban

areas, where the coverage is not wide, keep the SCTGAIN unchanged, but set a low

pilot channel gain. In this way, not only the coverage can meet the requirement, but

the capacity can increase accordingly.

2.2 Sync Channel Parameters (SYNC_CH)

[Command name] MOD SYNCH (Base Station Controller Management\Configuration Management\Cell

Channel Management -----Modify Sync Channel Parameters)

SYNCHGAIN (Sync Channel Gain)

[Description]

This parameter represents the sync channel gain in dB. From it, we can get the

percentage of the sync channel power to the total power.

[Type]

Algorithm parameter

[Range and unit]



-63.75 ~0. For the conversion method, refer to section 3.1.

[Operating range]

-80~-61

[Recommended value]

-68

[Setting tradeoffs]

-63.75 ~ 0dB is represented by 0~255. Step: 0.25dB. Sync channel gain = pilot

channel gain -10dB. If this relationship between sync channel gain and pilot channel

gain remains unchanged, the coverage of the sync channel will be roughly the same

as that of the pilot channel

2.3 Paging Channel Parameters (P_CH) [Command name] MOD PCH (Base Station Controller Management\Configuration Management\Cell

Channel Configuration\Modify Channel Parameters)

PCHGAIN (Paging Channel Gain)

[Description]

This parameter is used to set the paging channel gain in dB. From it, we can get the

percentage of the paging channel power to the total power.

[Type]

Algorithm parameter

[Range and unit]

-255~0. For the conversion method, refer to section 3.1.

[Operating range]

The value of this parameter depends on the pilot gain.

[Recommended value]



Pilot channel gain -1.5dB. For example, if the pilot channel gain is -28, the

recommended value is -34. (Paging rate = 9600, namely, PRAT =0)

[Setting tradeoffs]

It is the ratio of paging channel transmit power to the total transmit power of sector

carrier (in dB). -63.75 ~ 0dB is represented by -255~0. Step: 0.25dB.The paging

channel gain is related to the paging channel rate. When the paging channel rate is

9600, paging channel gain = pilot channel gain - 1.5dB. When the paging channel

rate is 4800, paging channel gain = pilot channel gain - 4.5dB.The PRAT field in

SCHM (sync channel message) is used to configure the paging channel rate. RAT=0,

9600; PRAT=1, 4800

BCMD (Broadcast Mode) [Description] Broadcast mode of paging channel can set multiple slots or cyclic broadcast. When

MS works with slot mode and monitors paging channel, the BTS should send

broadcast message through multiple slots mode or cyclic broadcast mode. Currently,

this product only supports multiple slots mode.

[Type] Um interface

[Range and unit] Multi-timeslot or periodic broadcast

[Operating range] Multi-timeslot

[Recommended value] Multi-timeslot

[Setting tradeoff] None

2.4 Quick Paging Channel Parameters (QP_CH) [Command name]



MOD QPCH (Base Station Controller Management\Configuration Management\Cell

Channel Configuration\Modify Quick Paging Channel Parameters)

QPCHNUM (Number of Quick Paging Channels)

[Description]

This parameter represents the number of quick paging channels. According to the

descriptions in protocol, when QPCH SUPPORTED is set to 1, this field must be set

to 0. If QPCH SUPPORTED is set to 0, BTS must omit this field.

[Type]

Um interface parameter (ESPM).

[Range and unit]

0~3

[Operating range]

0~3

[Recommended value]

0, which means QPCH is not recommended.

[Setting tradeoffs]

None

QPCHRT (QPCH Date Rate) [Description] This parameter represents quick paging channel rate (the representation of quick

paging channel rate is of the reverse with paging channel rate. For paging channel

rate, 0 stands for 9600bps but 0 stands for 4800bps in quick paging channel rate).

[Type] Um interface parameter (ESPM)

[Range and unit] 0-4800bps, 1-9600 bps



[Operating range] 0-1

[Recommended value] 0 is set to 4800 bps, which can save power consumption of QPCH.


PWRLEVCFG (Relative Power Level of CCI Modulation Symbol)

[Description]

This parameter represents the quick paging channel transmit power relative to the

pilot channel, when the PWRLEVCFG is transferred on the quick paging channel. If

CCISPT is set to “1”, configure the value according to Table 2-2.

Table 2-2 Quick paging channel power offset

PWRLEVPAGE

PWRLEVCFG

(binary)

Transmit Power

Level

(relative to pilot

transmit power)

000 -5

001 -4

010 -3

011 -2

100 -1

101 0

110 1

111 2

(IS20005A Table 3.7.2.3.2.13-3)


[Range and unit]

0~7dB

If the offset is -5dB, the actual range is -5~2dB.



[Operating range]

0~7

[Recommended value]

5, namely, 0dB

[Setting tradeoffs]

The tradeoff between the capacity of forward link and the standby time of the

MS should be considered when the transmit power of the quick paging channel

is set. If the transmit power of the quick paging channel is set high, the capacity

of the forward link will decrease, but the probability of successful detection of

the MS will be high, so its standby time can be prolonged. Vice versa. If the

load of a sector carrier is light, the value can be set large. If the forward load is

heavy, the value can be set small. The parameter should be set properly in

consideration of the load and the paging success ratio.

PWRLEVPAGE (Relative Power Level of PI Modulation Symbol)

[Description]

This parameter represents the quick paging channel transmit power relative to

the pilot channel, when the PWRLEVPAGE is transferred on the quick paging

channel. If PISPT is set to “1”, the value should be configured according to

Table 2-2.Refer to PWRLEVCFG.

[Type]

Um interface parameter (ESPM).

[Range and unit]

0~7dBIf the offset is -5dB, the actual range is -5~2dB.

[Operating range]

0~7

[Recommended value]



7, namely, 2dB

[Setting tradeoffs]

Usually, this parameter is first set to “2” to ensure the paging success ratio,

and it can be set to a smaller value, depending on the actual requirement. If

the load of a sector carrier is light, the value can be set large. If the forward

load is heavy, the value can be set small. The parameter should be set

properly in consideration of the load and the paging success ratio.

3. Recommendations for Power Control Parameter Configuration

3.1 Descriptions of Special Representation

3.1.1 Reverse Outloop Set Value The representation of the reverse out loop set value in R01 is greatly different from

that in R02.

In R02, the physical meaning of the reverse out loop set value in the database is

Eb/Nt for all rate configurations (RCs).The system automatically converts the Eb/Nt

into the corresponding Ec/Io and then sets it in CSM5000.

Representation of Eb/Nt: 0~255 represents 0~31.875dB.

Eb/Nt = X 0.125

For example, If REVINITSETP is set to 48, the Eb/Nt is 6dB; for RC1, the

corresponding Ec/Io is -15dB, and for RC3, the corresponding Ec/Io is -18.75dB.

In R01, the physical meaning of the reverse out loop set value in the database is

(Eb/Nt-21dB) for all RCs.The system automatically converts the Eb/Nt into the

corresponding Ec/Io for different RCs and then sets it in CSM5000.

Representation of (Eb/Nt-21dB): 0~255 represents -63.75~0dB.

Eb/Nt -21dB= -(255 – X)*0.25

For example, If REVINITSETP is set to “203”, the Eb/Nt is 8dB; for RC1, the

corresponding Ec/Io is -13dB, and for RC3, the corresponding Ec/Io is -16.75dB.

The correspondence between Eb/Nt and Ec/Io for different RCs is shown below:

RC1: Ec/Io = Eb/Nt - 21

RC2: Ec/Io = Eb/Nt - 21 + 1.75



RC3: Ec/Io = Eb/Nt - 21 - 3.75

RC4: Ec/Io = Eb/Nt - 21 - 3.5

EbNt = X × 0.125

R03 version follows the representation of R02 version.

3.1.2 Forward Channel Transmit Power The transmit power of all forward channels are represented by the gain relative to

the total transmit power of the sector carrier. The transmit powers of pilot channel,

sync channel and paging channel, maximum and minimum transmit powers of

forward traffic channel, and initial transmit power of forward traffic channel are all

represented in this way. Value range of X: 0 ~ 255

Value range of Y: 0 ~ 100%

The relationship between X and Y can be represented by the following equation

- (255-X) 0.25 =10logY

Where, X represents the forward channel gain, and Y represents the ratio of the

forward channel power to the total sector power.

1) Given the channel gain, how to calculate the percentage of the channel power

to the total sector power?

For example, if the gain of a channel is 227, then X=227.- (255-227) 0.25=-7dB,

and Y=10-0.7 100% =19.9%.That is, if the gain X =227, the corresponding channel

transmit power is approximately 20% of the total sector power.

2) Given the percentage of the channel power to the total sector power, how to

calculate the channel gain?

For example, if the channel gain accounts for 20% of the total sector power,

that is, Y=0.2, then X= 255 + 4 × 10logY=227

The above shows the representation and calculation mode of earlier R03

version. In R03 version, the representation and calculation mode are different but

the parameter meanings are the same. The specific representations are as

follows: Value range of X: -255 ~ 0, value range of Y: 0 ~ 100%. X/ 4 = 10 LogY.

Wherein, X represents parameter setting value of forward channel gain and Y

represents the ratio of the forward channel power to the total sector power. For

example, if the channel gain X is - 28, -28/4= -7dB, Y = 10-0.7 =19.9%. That is, if



the gain X =-28, the corresponding channel transmit power is approximately 20%

of the total sector power. The relationship between corresponding parameter

values in earlier R03 version and R03 version: if the set value in earlier R03

version is A, the value is set to A – 255 in R03 version.

3.1.3 Eb/Nt Set Value of Forward Fast Power Control The representation of this type of parameters is relatively simple. The value range of

these parameters is 0~255 and the step is 0.125dB.The parameter value times the

step is the actual value.

For example, if FOR_MAX_FCH_SET_PT is set to “112”, the actual value is

112 0.125=14dB

3.1.4 Representation of FER FER adopts the representation stipulated in the protocol. See the table below. In the

CDMA system, the quality is closely related with capacity. When the other conditions

remain unchanged, the capacity will decrease if the quality increases (that is, the

FER drops). Otherwise, the capacity will increase if the quality drops (that is, the

allowed FER rises).When the load in a cell is heavy, the capacity of the cell can be

enlarged by raising the FER. That is the so-called load control.

Table 3-1 Target FER

FER (Binary) Frame Error Rate

0 0.2%

00001-10100 0.5% -10% (in units of

0.5%)

10101-11001 11% - 15% (in units of

1.0%)

11010-11110 18% - 30% (in units of

3.0%)

11,111 Reserved

3.2 BSC-Level Power Control Parameters (BSCPWR) [Command name]



MOD/LST BSCPWR

PWRSYNSW (TCH Power Sync Switch) [Descriptions] Whether to enable power sync function.

[Type] Algorithm parameter

[Range and unit] 0 –Yes (ON)

1—NO (Off)

[Operating range] 0 and 1

[Recommended value] 0--disable

PWRADJTP (TCH Power Syn. Adjust Type) [Description] This field represents whether FCH power sync algorithm to use relative or

absolute value for power adjustment. The relative value here is that of At/Ap.


[Range and unit] 0-------relative value

1------absolute value


[Recommended value] 0—relative value, which should not be modified

STARTVALVE (TCH Power Sync Start Valve) [Description] If FCH power sync algorithm switch is open, power sync occurs during soft

handoff when power difference between the branches is more than this valve.

[Type]



Algorithm parameter

[Range and unit] 0--255, with the unit of 0.25dB

[Operating range] [Recommended value] 8, which should not be modified

[Setting tradeoff] The larger parameter value, the larger start valve, and the larger power

difference between allowed branches is. Vice versa.

STOPVALVE (TCH Power Sync Stop Valve) [Description] If FCH power sync algorithm switch is open, perform once power sync

adjustment during soft handoff because power difference between branches is

more than” TCH power sync start valve”. Continue to perform power sync

adjustment if the power difference between branches is still more than this

valve. If the power difference is less than this valve after the adjustment, stop

the power sync adjustment.


[Range and unit] 0--255, with the unit of 0.25dB

[Operating range] 4--16 (stop valve is smaller than start valve)

[Recommended value] 4, which should not be recommended

[Setting tradeoff] The larger parameter value, the easier power sync stops and the larger power

difference between allowed branches. Vice versa.

CALCUMETHOD (TCH Power Sync Calculation Method) [Description] This field represents the calculation method of At/Ap in the FCH power sync.

[Type]



Algorithm parameter

[Range and unit] 0---METHOD0 (extreme value average method), 1----METHOD1 (the

strongest branch method), 2----METHOD2 (hybrid method) and

3----METHOD3 (weighted-average method)

[Operating range] 0, 1, 2 and 3

[Recommended value] 0---adopt extreme value average method, which should not be modified.

DELAYFRAMES (TCH Power Sync Delay Frames) [Description] After once power sync adjustment is delivered, the reverse frame received

within a time period cannot reflect power change after the adjustment and

cannot be a trigger source to trigger a new adjustment. Perform a new

adjustment after waiting for a delay. This parameter represents this delay.


[Range and unit] 3--255, with the unit of frame

[Operating range] 3--255

[Recommended value] 3, which should not be modified

[Setting tradeoff] This parameter affects power sync frequency. The larger the parameter value,

the lower the frequency. Vice versa.

SCHPWRSYNSW (SCH Power Synch Switch) [Description] Whether to enable SCH power Sync function.




[Range and unit] 0—Off 1---On



SCHPWRADJTP (SCH Power Sync Adjustment Type) [Description] This parameter represents that SCH power sync algorithm adopts relative or

absolute value for power adjustment. Here, relative value is that of At/Ap.


[Range and unit] 0—relative value 1---absolute value

[Operating range] 0---relative value


SCHCALCMETHOD (SCH Power Sync Calculation Method) [Description] This field represents At/Ap calculation method in the SCH power sync.


[Range and unit] 3---METHOD3 (weighted-average method). Refer to [Range and Unit] of

“TCHCALCMETHOD (TCH Power Sync Calculation Method)”.

[Operating range] 3

[Recommended value] 3---adopt weighted-average method, which should not be modified.



SCHSYNPERIOD (SCH Power Sync Period) [Description] Once SCH power synch algorithm is activated, start periodical power sync.

This parameter represents the period for SCH power sync. But FCH power

sync algorithm is activated based on start valve and stop valve.


[Range and unit] 0--255, with the unit of frame



[Setting tradeoff] The larger parameter value, the larger SCH power sync frequency..

If the frequency is large, power adjustment effect may not be feed back in

time to affect sync performance.

REVSCHPWRCTRLSW (Reverse SCH Power Control Switch) [Description] Whether to enable reverse SCH power control function.


[Range and unit] 0---Off 1--On

[Operating value] 0 and 1

[Recommended value] 0--Off

3.3 Reverse Closed Loop Power Control Parameters (RCLPC) [Command name]



MOD RCLPC (Base Station Controller Management\Configuration

Management\Algorithm Management\Modify Reverse Closed Loop Power

Control Parameters)

REVPWRCSTEP (Reverse Power Control Step)

[Description]

This parameter represents the power control step in the reverse closed loop

power control mode. When the MS receives an UP power control bit on the

forward power control sub-channel, the transmit power of the MS will increase

by one power control step on the basis of the open loop estimation and the

previous closed loop adjustment value. If the MS does not support reverse

supplementary channel or reverse supplementary code channel, the MS must

support power control step with 1 dB. Otherwise, the MS must support power

control step with 0.5 dB and 1 dB. If MS supports power control step with

0.25dB, MS should support power control step with 0.5dB and 1 dB.

[Type]

Um interface parameter, used by the MS (PCNM, UHDM and GHDM).

[Range and unit]

0 ~ 2, where 0 represents a step of 1dB, 1 represents a step of 0.5dB and 2 a

step of 0.25dB respectively.

[Operating range]

0~2


[Setting tradeoffs]

If the step is small, the power will change steadily. Otherwise, the power

will change dramatically. Because the reverse power can be adjusted 800

times per second, the controlled speed can meet the requirement. The smaller

the power control step is, the more precise the power control is. In this way,



less power will be wasted. Therefore, a step of 0.25dB is optimal to save the

system power.

When the MS does not support some power control steps, but if the value

of this parameter is small, the MS will automatically select a step that it

supports. For example, if the minimum power control step that the MS supports

is 0.5dB, but the reverse power control step is set to 0.25dB in the system, the

MS will automatically set the power control step to 0.5dB.

VFCHRLGAINADJ (Voice Service R-FCH Power Adjust Gain Relative to ACH) DFCHRLGAINADJ (Data Service R-FCH Power Adjust Gain Relative to ACH)

[Description]

This parameter represents the power adjustment of the reverse traffic channel

relative to access channel, enhanced access channel and reverse universal

control channel. In the following formula, after the MS accesses the system, the

initial power of the traffic channel is the power of the current access channel

plus the value of this parameter.

mean output power (dBm) =

- mean input power (dBm)

+ offset power (from Table 2.1.2.3.1-1)

+ interference correction

+ ACC_CORRECTIONS

+ RLGAIN_ADJs

They are set based on voice and data service separately.

[Type]

Um interface parameter, used by the MS (ECAM)

[Range and unit]

-8 dB~7dBoffset.



[Operating range]

0~6

[Recommended value]

0

[Setting tradeoffs]

A high value can improve the transmission quality at the early stage of calls as

well as the call setup success ratio, but will affect the system capacity and

increase the power consumption of the MS.

RLGAINSCHPLT1X (1X R-SCH Gain Offset Relative to R-PICH) RLGAINSCHPLT2X (2X R-SCH Gain Offset Relative to R-PICH) RLGAINSCHPLT4X (R 4X R-SCH Gain Offset Relative to R-PICH) RLGAINSCHPLT8X (R 8X R-SCH Gain Offset Relative to R-PICH) RLGAINSCHPLT16X (16X R-SCH Gain Offset Relative to R-PICH) RLGAINSCH_PLT32X (32X R-SCH Gain Offset Relative to R-PICH)

[Description]

The group of above parameters represent the power offsets of the SCH relative

to the pilot channel and the power offset is delivered to the MS in the extended

supplement channel assignment message (ESCAM).

Note: The value of this parameter is a part of the power offset of reverse SCH

and reverse pilot, as shown in the following formula:

mean code channel output power (dBm) =

mean pilot channel output power (dBm)

+ 0.125 *( Nominal_Attribute_Gain[Rate, Frame

Duration, Coding]

+ Attribute_Adjustment_Gain[Rate, Frame Duration,

Coding]

+ Reverse_Channel_Adjustment_Gain[Channel]

- Multiple_Channel_Adjustment_Gain[Channel]



- Variable_Supplemental_Adjustment_Gain[Channel]

+ RLGAIN_TRAFFIC_PILOTs

+ RLGAIN_SCH_PILOT[Channel]s)

+ IFHHO_SRCH_CORR.

[Type]

Um interface parameter, used by the MS (ESCAM)

[Range and unit]

-32 ~31, (unit: 0.125dB).

[Operating range]

0~22

[Recommended value]

Shown in the following table

If recommended value is set to 8, it is 1dB.

Rate Recommended value

1X 8

2x 12

4x 16

8x 18

16x 20

32x 22

[Setting tradeoffs]

A high value of this parameter can improve the transmission efficiency of the

reverse SCH, but will affect the reverse capacity. The higher the rate of SCH

is, the higher the required power is. Therefore, the offset of this parameter

should also be larger.

FCHMPLTGAINRC3 (Gain of RC3 R-PICH Relative to Main Channel for FCH)



FCHMPLTGAINRC4 (Gain of RC4 R-PICH Relative to Main Channel for FCH) [Description] This group of parameters is used reverse inloop power control of IS2000. BTS

converts representation of traffic channel EbNt of target SetPoint sent from

the BSC into that of Eclo and compares with actual reverse pilot Eclo to

determine reverse power control bit. This parameter is sent through Abis

interface and A3 interface and delivered to BTS by BSC.

[Type] Abis and A3 interface protocol parameters, used by BTS.

[Range and unit] -255–0, with the unit of 0.125dB

[Operating range] -255–0



VFCHREVINIT (Voice Service Reverse Initial Set Value for FCH) DFCHREVINIT (Data Service Reverse Initial Set Value for FCH)

[Description]

For different RCs, the system automatically converts the value of this

parameter to the corresponding Ec/Io and then sets it in BTS (Refer to section

3.1.1 Set Value of reverse OutLoop FCH).The value of this parameter is

reasonable if it does not cause too high an overshoot.

They are set based on voice and data service separately.

[Type]

Algorithm parameter

[Range and unit]



0~255 (unit: 0.125dB)

[Operating range]

(REV_MIN_FCH_SET_PT + 3dB) ~ REV_MAX_FCH_SET_PT -1dB)

[Recommended value]

48, which means the initial Eb/Nt =6dB for all RCs.

[Setting tradeoffs]

If the value of this parameter is large, the reverse power control will start at

a high power level, so power will be wasted at the beginning. If the value is small,

it is necessary to increase the Eb/Nt through the reverse power control. In this

way, the FER at the very beginning of calling may be higher than the expected

FER. This value will affect the time in which the Eb/Nt can be adjusted to a

proper value through the reverse power control. If the value of this parameter is

properly set, the Eb/Nt can be adjusted to the required value quickly. Thus, the

network performance can ensure that the FER will not be higher than the

specified FER, and meanwhile, little power resource is wasted.

If this value is too small, network FER cannot satisfy requirements (such as

1%). If this value is too large, power waste occurs at the very begging.

VMAXFCH (Voice Service Max. Value of FCH Outer Loop) DMAXFCH (Data Service Max. Value of FCH Outer Loop)

[Description]

This parameter represents the maximum set value of out loop FCH Eb/Nt. They

are set based on voice and data service separately.

[Type]

Algorithm parameter

[Range and unit]

0~255 (unit: 0.125dB)

[Operating range]



48~96

[Recommended value]

96, which means the maximum set value of out loop FCH Eb/Nt =12dB for all

RCs

[Setting tradeoffs]

If the value of the parameter is large in the severe radio environment, the call

quality can be ensured but the reverse capacity of the system will decrease.

If the value is small, a call drop may occur under the fading environment, such

as at a corner. Under the interference environment, a properly high value of this

parameter can ensure the call quality and reduce the call drop ratio. But the

function is subject to the limitation of the maximum transmit power of the MS.

VMINFCH (Voice Service Mini. Value of FCH Outer Loop) DMINFCH (Data Service Mini. Value of FCH Outer Loop)

[Description]

This parameter is a reverse FCH closed loop power control parameter. The

parameter represents the minimum set value of reverse FCH Eb/Nt. They are

set based on voice and data service separately.

[Type]

Algorithm parameter

[Range and unit]

0~255 (unit: 0.125dB)

[Operating range]

8~32

[Recommended value]

Mini. Voice service FCH outloop set value is set to 16 for all RCs and the

minimum set value of outloop EbNt= 2dB.



Mini. Data service FCH outloop set value is set to 32.

[Setting tradeoffs]

If the value of this parameter is set too large, the Eb/Nt will be higher than the

required value, so the reverse power will be wasted and the reverse capacity

will greatly be affected.

If the value is set small, there is much room for the adjustment of reverse out

loop algorithm. So the call quality can be ensured and the reverse capacity can

be improved, given a high power control performance.

But if the value is set too small, it is possible that the out loop set value

decreases so much that it can not rise in time under the fading environment, so

the call quality may be affected.

MAXDCCH (Max. Value of DCCH) [Description] Refer to [Description] of max. FCH outloop set value.

MINDCCH (Mini. Value of DCCH) [Description] Refer to [Description] in mini. FCH outloop set value.

MAXSCH (Max. Value of SCH) [Description] This parameter represents maximum Eb/Nt set value of the reverse SCH

closed loop power control (outloop corresponding to FCH).


[Range and unit] 0~255, with the unit of 0.125dB


[Recommended value]



96, which represents maximum outloop set value EbNt =12dB for all rates.

[Setting value] If this parameter is set to a higher value, data transmission quality can be

ensured even under server radio environment but system reverse capacity

decreases.

If this parameter is set a small value, many error frames occur, affecting data

service transmission. Under the interference environment, a properly high

value of this parameter can ensure the data transmission quality and reduce

the call drop ratio. But the function is subject to the limitation of the maximum

transmit power of the MS.

MINSCH (Mini. Value of SCH) [Description] This parameter represents the minimum Eb/Nt set value of reverse SCH

closed loop power control (outloop corresponding to FCH).




[Recommended value] 32, which represents minimum outloop set value EbNt= 4dB for all RCs.

[Setting tradeoff] If this parameter is set a high value, reverse SNR EbNt is higher than

required value to waste reverse power and reverse capacity is affected

greatly.

If this parameter is set to a small value, there is much room for the

adjustment of reverse SCH out loop algorithm. So the data service

transmission quality can be ensured and the reverse capacity can be

improved, given a high power control performance.

FCHPWRCFRQ (Reverse Outer Loop Power Control Period for FCH)



DCCHPWRCFRQ (Reverse Outer Loop Power Control Period for DCCH)

[Description]

The value of this parameter determines the reverse out loop control period. If

PWR_CTRL_FREQ_FCH (reverse FCH out loop power control period)

consecutive good frames are received, the Eb/Nt will decrease by

EB_NT_DOWN_STEP_FCH (Eb/Nt down step).This parameter is one of

reverse power control parameters. The algorithm convergence should be

considered when this parameter is modified.

[Type]

Algorithm parameter

[Range and unit]

0~255 (unit: frame).

[Operating range]

This value should correspond to the target FER of FCH.

[Recommended value]

33

[Setting tradeoffs]

If the value of this parameter is set large, the control period will be long and

the power will change steadily. If the value is set small, the control period will

be short and the power will change dramatically

FCHNTDWNSTEP (Eb/Nt Down Step for FCH)

[Description]

This parameter represents the Eb/Nt down step after PWR_CTRL_FREQ_FCH

(power control period of reverse outloop (FCH)) consecutive good frames

appear.

[Type]



Algorithm parameter

[Range and unit]

0~255 (unit: 0.125dB)

[Operating range]

0~255

[Recommended value]

1, namely, 0.125dB

[Setting tradeoffs]

If the value is set small, the power will change steadily and the overshoot will

be low. If the value is set large, the power will change dramatically and the

overshoot will be high. To obtain a power control precision as high as possible,

the value is usually set to 1

FCHENMAXSTEP (Eb/Nt Max. Adjustment Step for FCH)

[Description]

This parameter represents the allowable maximum adjustment step each time

the power is adjusted. Refer to “PWR_CTRL_FREQ_FCH (power control

period of reverse outloop (FCH))”

[Type]

Algorithm parameter

[Range and unit]

0~255 (unit: 0.125dB)

[Operating range]

5~10

[Recommended value]

10, namely, 1.25dB



[Setting tradeoffs]

This parameter is used to restrict the adjustment step of the out loop power

control so that the adjustment step could not be too large. If the adjustment

step is set too small, the desired adjustment will be so restricted that the

normal power control performance could fail. Therefore, the adjustment step

can not be set too small

LNKRPTFRQ (Power Control Report Granularity)

[Description]

This parameter represents the time granularity when the reverse link report of

FMR is reported to SPU.

[Type]

Algorithm parameter

[Range and unit]

10~255 (unit: 100ms)

[Operating range]

10~255

[Recommended value]

20, which should not be modified

[Setting tradeoffs]

None

OLOOPPERIODSCH (Power Control Period of Reverse Outer Loop for SCH) [Description] This value determines adjustment period of reverse SCH outloop (or closed

loop, because reverse SCH closed loop has no obvious outloop). After

OUTER_LOOP_PERIOD_SCH (Power Control Period of Reverse Outer



Loop for SCH) good frames are received, decrease OLOOPDSTEP (Eb/Nt down step for SCH). Consider algorithm convergence when a group of

parameters in reverse SCH closed loop power control, which is similar to FCH

outer loop. [Type] Algorithm parameter

[Range and unit] 0~255, with the unit of frame


[Recommended value]

19

[Setting tradeoff] If the value of this parameter is set large, the adjustment period will be long

and the power will change steadily. If the value is set small, the adjustment

period will be short and the power will change dramatically.

OLOOPDSTEPSCH (Eb/Nt Down Step for SCH) [Description] This parameter represents set down step after

OUTER_LOOP_PERIOD_SCH good frames are received.




[Recommended value] 1, namely, 0.125dB

[Setting tradeoff] If this parameter is set to a small value, the power control is stable, with little

adjustment. If this parameter is set to a large value, power control changes



dramatically, with obvious adjustment. To obtain accurate power control

value, this parameter is set to 1 in general.

OLOOPMAXUSTEPSCH (Eb/Nt Max. Adjustment Step for SCH) [Description] This parameter represents allowable max. step after reverse SCH closed loop

power control algorithm obtains set up step.




[Recommended value] 10, namely, 1.25dB

[Setting tradeoff] This parameter is to restrict once outloop adjustment value within an allowable

range. If this value is set too small, the normal adjustment is restricted to

affect normal power control performance. Therefore, this value should not set

too small. RCAGFAC (SCH Inner Loop Power Control Adjust Factor) [Description] This parameter represents a ratio factor of actual RCAG adjustment to

calculated RCAG adjustment. Currently, this parameter is set to 1, indicating

that perform the adjustment directly through calculated RCAG adjustment.




[Recommended value]




ILOOPTHRESCH (SCH Inner Loop Power Control Threshold) [Description] This parameter represents a threshold whether to perform RCAG adjustment.

RCAG adjustment aims to enable SCH Eb/Nt estimated by the BSC close to

required value. If there is an obvious difference between this estimation value

and set value, trigger RCAG adjustment.




[Recommended value] 4, namely, 0.5dB, which should not be modified

ILOOPINTSCH (SCH Inner Loop Power Control Interval) [Description] This parameter represents minimum interval sending two adjacent PCNMs,

because RCAG adjustment is sent to MS through power control message,

that is, minimum interval of two adjacent RCAG adjustments.





[Setting tradeoff]



If this value is set small, signaling overload on the FCH may occur. If this

value is set large, power control rate is slow.

SETEBNTVALTIMESCH (SCH Outer Loop Eb/Nt Set Valid Duration) [Description] This parameter represents whether the SCH requested by two adjacent Data

Burst inherits interval of Eb/Nt set value. Because MS applies for reverse SCH

and if the interval between Duration start time of latter SCH and end time of

former SCH is less than this parameter, the Eb/Nt set value of latter SCH

inherits the final set value of former Eb/Nt.





MAXRCAG (Max. RCAG Value) [Description] This parameter represents maximum RCAG value.

According to the protocol, the code channel transmit power is shown below

when MS sends traffic channels of RC3, 4, 5 and 6:

mean code channel output power (dBm) =

mean pilot channel output power (dBm)

+ 0.125 × (Nominal_Attribute_Gain[Rate, Frame Duration,

Coding]

+ Attribute_Adjustment_Gain[Rate, Frame Duration, Coding]

+ Reverse_Channel_Adjustment_Gain[Channel]

- Multiple_Channel_Adjustment_Gain[Channel]

- Variable_Supplemental_Adjustment_Gain[Channel]

+ RLGAIN_TRAFFIC_PILOTs



+ RLGAIN_SCH_PILOT [Channel] s)

+ IFHHO_SRCH_CORR

Where, mean pilot channel output power represents output power

of reverse pilot channel and transmit power when reverse closed

loop power control adjusts R-PICH. On the basis of reverse pilot

power, the overlay of FCH transmit power and SCH transmit

power has offsets, which are set by many parameters. They are

detailed as follows:

RLGAIN_TRAFFIC_PILOTs: Efficient for reverse FCH,

reverse SCH and DCCH. They are delivered to MS through

ESPM.

RLGAIN_SCH_PILOT: Efficient for R-SCH only. It is delivered

through ESCAM.

Nominal_Attribute_Gain: MS should keep a

Nominal_Attribute_Gain table, reflecting power offset of RSCH,

RFCH, or RDCCH to reverse pilot channel. They are specified

in a table by the protocol.

Attribute_Adjustment_Gain: MS should keep an

Attribute_Adjustment_Gain table, including data rates, frame

length, code rate and power gain relative to reverse pilot

channel. MS initializes this table to 0.

Reverse_Channel_Adjustment_Gain: Similar to

Attribute_Adjustment_Gain. This parameter is abbreviated as

RCAG.

Multiple_Channel_Adjustment_Gain: If reverse pilot channel is

eliminated and MS is sending two or more code channels, MS

should set this parameter based on the method specified by

the protocol. Otherwise, MS sets this parameter to 0. This

adjustment decreases transmit power of R-FCH to increase

FER of R-FCH after MS starts to send R-SCH. This parameter

is abbreviated as MCAG.



If MS is sending two or more code channels except reverse pilot

channel, MS sets Multiple_Channel_ Adjustment_Gain [Channel]

for each channel based on the following modes:

a) Label Max_Channel as the code channel with highest

Pilot_Reference_Level when MS is sending all the code

channels. Check the Pilot_Reference_Level through protocol

table.

b) Set Multiple_Channel_Adjustment_Gain[Max_Channel] to 0.

c) The settings for other channels are shown below:

Multiple_Channel_Adjustment_Gain[Channel]=Pilot_Reference

_Level[Max_Channel] - Pilot_Reference_Level[Channel]

Variable_Supplemental_Adjustment_Gain: If MS supports reverse

SCH of variable rate and is using the rate on R-SCH, MS sets this

parameter based on the method provided by protocol. Otherwise,

set this parameter to 0.

IFHHO_SRCH_CORR represents a correction of different

frequency hard handoff.

For the above variables, modify dynamically power offset of

R_SCH relative to R-PICH. Implement reverse SCH power control

through Nominal_Attribute_Gain and

Reverse_Channel_Adjustment_ Gain.

Because the operating range to adjust relevant parameters of

the former in the PCM is inconsistent with initial value range of MS,

the latter instead of the former is used for an adjustment of SCH

power control. That is, RCAG.


[Range and unit] -48~48, with the unit of 0.125dB

[Operating range] -48~48




MINRCAG (Mini. RCAG Value) [Description] This parameter represents the minimum RCAG value. Refer to [Description] in the maximum RCAG value”.


[Range and unit] -48~48, with the unit of 0.125dB


[Recommended value] -8, which should not be modified

MAXRCAGADJSTEP (Max. RCAG Adjust Step) [Description] This parameter represents maximum adjustment step in case of RCAG

adjustment.





3.4 Forward Slow Power Control Parameters (FSLOWPC) [Command name] MOD FSLOWPC (Base Station Controller Management\Configuration

Management\Algorithm Management\ Modify Forward Slow Power Control

Parameter)



FWDMAXCHGAIN (Max. Transmit Power of FCH)

[Description]

This parameter represents the maximum transmit power of forward channel in

the measurement report power control mode. The capacity and quality can well

be balanced by modifying the value of this parameter. Therefore, this

parameter will be determined according to the actual requirement.

[Type]

Algorithm parameter

[Range and unit]

-255~0, with the unit of 0.28dB. For the representation, refer to 3.1.3.

[Operating range]

(pilot channel gain -6dB) ~ pilot channel gain

[Recommended value]

Pilot channel gain -3dB (PLTCHNPWRGAIN - 12). For example, if the pilot

channel gain is -28, the recommended value is -40.

[Setting tradeoffs]

This parameter is used to restrict the maximum transmit power of forward

channel to avoid a single traffic channel from occupying excessive forward

power resources as a result of the power control. Under severe environments,

if the value of this parameter is set too large, the call quality can still keep at a

certain level, but the forward capacity will decrease. If the value is set too

small, the call quality will be greatly degraded, or even call drops may occur,

but the forward capacity will relatively increase.

FWDMINCHGAIN (Min. Transmit Power of FCH)

[Description]



This parameter represents the minimum transmit power of forward channel in

the measurement report power control mode.

[Type]

Algorithm parameter

[Range and unit]

-255~0, with the unit of 0.25dB. For the representation, refer to 3.1.3.

[Operating range]

(Pilot channel gain -13dB) ~ (pilot channel gain - 9dB)

[Recommended value]

Pilot channel gain -9dB (PLTCHPWRGAIN -36). For example, if the pilot

channel gain is -28, the recommended value is -64. In the practical networks,

this value can be set lower properly to increase the system capacity and keep

the call drop ratio within the required range.

[Setting tradeoffs]

Under good radio environments, if the value of this parameter is set large, the

improvement of call quality will not be very significant, but the forward capacity

will decrease. If the value is set small, the change of call quality will not be

significant, either, but the forward capacity will increase. Ensure that the power

can increase quickly when the radio environment becomes deteriorated

FWDINITCHNGAIN (FCH Initial Transmit Power)

[Description]

This parameter represents the initial transmit power of forward channel in the

measurement report power control mode. In the capacity test, to ensure the

capacity, set appropriately initial transmit power of forward channel to a small

value. For example, if radio environment of capacity test is good, decrease this

parameter to -68 (pilot channel gain is -28), but a call must be connected.



[Type]

Algorithm parameter

[Range and unit]

-255~0, with the unit of 0.25dB. For the representation, refer to 3.1.3 [Operating range]

(FWDMAXCHGAIN - 3dB) ~ FWDMAXCHGAIN.

FWDMAXCHGAIN is determined by pilot gain. For the operating range, see

that in “FWDMAXCHGAIN (max. transmit power of forward channel)”.

[Recommended value]

Pilot channel gain-7dB (PLTCHPWRGAIN -28). If pilot gain is -28, this value is

-56.

[Setting tradeoffs]

The initial power should be slightly lower than the maximum transmit power so

as to ensure the call quality when the call is established. If forward radio

environment is good, FER is low and forward power decreases quickly.

THRSPWRDWN (Power Decrease Step)

[Description]

This parameter represents the step by which the power decreases when the

timer waiting for power control measurement report from MS. The smaller the

down step, the little possibility call drops caused by decrease power during the

power control.

[Type]

Algorithm parameter

[Range and unit]



0~255 (unit: 0.25dB)

[Operating range]

0~255

[Recommended value]

2, namely, 0.5 dB

[Setting tradeoffs]

If the value of this parameter is set too large, the power will decrease greatly,

but the quick decrease may result in power waste. When the value is set too

small, the power will decrease a little, the slow decrease may result in power

waste instead of call drops.

PWRRPTTHRS (Power Control Reporting Threshold)

[Description]

This parameter represents the cooperation between measurement report

parameters. Refer to bad frame counter. If the received bad frames in the

period stipulated by the parameter PWRRPTFRMNUM exceed the threshold,

the MS will report the power measurement report message.

[Type]

Um interface parameter, used by the MS (SPM)

[Range and unit]

0~31 (unit: frame).

[Operating range]

0~31

[Recommended value]

2

[Setting tradeoffs]



If the value of this parameter is set too large, the radio signal fading can not

be compensated to quickly in the threshold-based measurement report

power control mode, so a power control delay will occur. If the value is set

too small, the power measurement report message will frequently be

reported. In this case, too many signaling messages will affect the call

quality. If the value is set to “1”, the MS will report a power measurement

report message (PMRM) each time it receives a bad frame. If target FER is

1%, it is normal to receive one error frame within 100 frames. But if power

report threshold is set to 1, error frame is taken as power increase by

mistake. So good power control performance cannot be obtained.

PWRRPTFRMNUM (Power Control Reporting Frame Count)

[Description]

This parameter determines the power report measurement period Z = 5 × 2^

(PWRRPTFRMNUM /2) frames. In the period-based measurement report

power control mode, a PMRM will be reported each time the MS receives Z

frames. In the threshold-based measurement report power control mode, the

bad frames will also be measured each time the MS receives Z frames. If the

total bad frames out of Z frames do not reach the “power report threshold", bad

frames will be counted from "0” again in the next measurement period. If the

bad frames out of Z frames reach the “power report period threshold” before a

measurement period ends, a PMRM will be reported. In the meantime, a new

measurement period will start and the period length is still Z frames.

[Type]


[Range and unit]

0~15, with the unit of frame, 0: FRAME5,1: FRAME7,2: FRAME10,3:

FRAME14,4: FRAME20,5: FRAME28,6: FRAME40,7: FRAME56,8:

FRAME80,9: FRAME113,10: FRAME160,11: FRAME226,12: FRAME320,13:

FRAME452,14: FRAME640, and 15: FRAME905.



[Operating range]

0~15, drop-down list on the maintenance console is used to display the range

of value, and select the value directly.

[Recommended value]

9, namely, 113 frames

[Setting tradeoffs]

In the threshold-based measurement report power control mode, the value of

this parameter is only used as the measurement period. If the value is set

large, the number of re-measurements will be reduced. The calculated bad

frames will be more than the actual ones since the total measured frames are

smaller due to the segmentation of period.

If cycle mode is adopted, set the parameter based on target FER and

PWRRPTTHRS. For example, target FER is set to 1, and PWRRPTTHRS is

set to 2, the cycle must be about 200 frames. According to the formula, the

parameter is set to 11(226 frames). But this mode is not adopted in generally.

PWRTHREENABLE (Power Threshold Report Flag)

[Description]

This parameter is a measurement report power control parameter, indicating

whether the threshold-based measurement report power control mode is used.

Since the response is quick in the threshold-based measurement report power

control mode, this kind of power control mode is usually used.

[Type]


[Range and unit]

0 or 1. 0 – Not used; 1 – Used.



[Operating range]

0 or 1

[Recommended value]

1

[Setting tradeoffs]

None

PWRPERIODENABLE (Period Report Mode Flag)

[Description]

Measurement report power control will have a high performance if the

threshold-based measurement report power control is used.

[Type]


[Range and unit]

0 or 1, 0 – Not used; 1– Used

[Operating range]

0 or 1

[Recommended value]

0, period-based measurement report power control is not used.

[Setting tradeoffs]

None

PWRPTDL (Power Report Delay)

[Description]

After reporting a PMRM, the MS will wait for a while to start the measurement

in the next measurement period. The value of this parameter determines how

many frames the MS waits for to start the next measurement period. The



purpose of setting the time of the delayed measurement is to restart the

measurement of forward frames after the forward power control triggered by

the previous PMRM takes effect.

[Type]

Um interface, used by MS (SPM).

[Range and unit]

0~31 (unit: 4 frames)

[Operating range]

1~2

[Recommended value]

1

[Setting tradeoffs]

If the delay is set large, the probability of bad frames not being measured will

increase, so it is set to the minimum “1”, namely, 4 frames.

WAITMSPCRPTTIMER (Wait MS Power Control Measurement Report Timer Length)

[Description]

In the threshold-based measurement report power control mode, if the power

measurement report message reported by the MS fails to be received within

the timer length, the forward transmit power of the current forward traffic

channel will be reduced. The timer length parameter is configured in TIMER.

[Type]

Algorithm parameter, used by power control module in SPU

[Range and unit]

0~255 (unit: 1 second)

[Operating range]



0~255

[Recommended value]

2, namely, 2 seconds

[Setting tradeoffs]

The smaller the timer length is, the quicker the power control is. In the

meantime, the mean square deviation will increase, too. But if the timer length

is set too large, the power control will become so slow that the radio signal

change might fail to be traced. As a result, call drops and power waste may be

caused.

FSCHFERRPT (FSCH FER Report Indication)

[Description]

This parameter indicates whether the MS reports the frame quality information

of the FSCH. If this parameter is set to “1”, the MS will record the total frames

and bad frames of FSCH. After a burst completes, the MS will report the frame

information of SCH via PMRM and also reset the counter. If the parameter is

set to “0”, the MS will not report any information of SCH.

[Type]

Um interface parameter, used by the MS (ESCAM)

[Range and unit]

0 or 1. 0 – Not report; 1– Report

[Operating range]

0 or 1

[Recommended value]

0

[Setting tradeoffs]

None



3.5 Forward EIB Power Control Parameters (FEIBPC) [Command name] MOD FEIBPC (Base Station Controller Management\Configuration

Management\Algorithm Management\Modify Forward EIB Power Control

Parameter)

FWDCHMAXGAIN (F-TCH Max. Tx. Power)

[Description]

This parameter represents the maximum transmit power of the forward channel

in the EIB power control. The capacity and quality can well be balanced by

modifying the value of this parameter. Therefore, this parameter will be

determined according to the actual requirement.

[Type]

Algorithm parameter, used by power control modules of FMR

[Range and unit]

-255~0, with the unit of 0.25dB. For details, see section 3.1.3

[Operating range]

(Pilot channel gain -3dB) ~ Pilot channel gain

[Recommended value]

Pilot channel gain -3dB (PLTCHPWRGAIN – 12). For example, if the pilot

channel gain is -28, the value of this parameter is -40. The pilot gain is

recommend as -1dB.

[Setting tradeoffs]

This parameter is used to restrict the maximum transmit power of forward

channel to avoid a single traffic channel from occupying excessive forward

power resources as a result of the power control. Under severe environments,

if the value of this parameter is set too large, the call quality can still keep at a



certain level, but the forward capacity will decrease. If the value is set too

small, the call quality will be greatly degraded or even call drops may occur,

but the forward capacity will relatively increase.

FWDCHMINGAIN (F-TCH Min Tx. Power)

[Description]

This parameter represents the minimum transmit power of the forward channel

in the EIB power control.

[Type]


[Range and unit]

-255~0, with the unit of 0.25dB. For details, see section 3.1.3

[Operating range]

(Pilot channel gain-15dB) ~ (pilot channel gain -- -9dB)

[Recommended value]

Pilot channel gain -9dB (PLTCHPWRGAIN - 36). If the pilot channel gain is -28,

the recommended value is -64. Pilot gain is recommend to -15dB that is -88.

[Setting tradeoffs]


improvement of call quality will not be very significant while the forward

capacity will decrease. If the value is set small, the change of call quality will

not be significant while the forward capacity will increase. Ensure that the

power can increase quickly when the radio environment becomes

deteriorated.

EIBTCNT (Timer Length After Bad Frame Received)

[Description]



This parameter represents the counter length since a bad frame is received. If

another bad frame is received within the counter length, the forward power of

the BTS will remain unchanged. If a good frame is received within the counter

length, the forward power will decrease by a big step EIBDWNSTEP.

[Type]


[Range and unit]

0~255 (unit: frame)

[Operating range]

0~255

[Recommended value]


[Setting tradeoffs]

Consider algorithm convergence when EIB algorithm parameter is modified.

The convergence: Under certain target FER, supposing actual FER of radio

link is up to target FER, down power and up power in a control period are off

tradeoff. If target FER is 1%, that is, 1 bad frame, 99 good frames, power

keeps balance after once power up and 99 times of power down.

EIBUPSTP (Power Up After Bad Frame Received)

[Description]

This parameter represents the power increase step when one bad frame is

received after many successive good frames.

[Type]


[Range and unit]



0~255 (unit: 0.25dB)

[Operating range]

0~255

[Recommended value]

8, namely 2dB

[Setting tradeoffs]

If the EIB algorithm parameter needs to be modified, the algorithm

convergence should be taken into consideration. When the value of this

parameter is set large, the fading can be compensated quickly, but some

power will be wasted. When the value is set small, the transmit power can be

saved, but the call quality will be degraded.

EIBDWNSTPS (Power Down After Timer Reset to 0)

[Description]

This parameter represents the power decrease step when a good frame is

received. If continuous good frames are received, the number satisfies down

period and power down value calculated by FER and up step.

[Type]


[Range and unit]

0~255 (unit: 0.25dB)

[Operating range]

0~255

[Recommended value]

1, namely, 0.25dB, which should not be modified

[Setting tradeoffs]



If the EIB algorithm parameter needs to be modified, the algorithm

convergence should be taken into consideration. The value of this parameter

is usually set to “1”.If the value is set larger than “1”, the power control will be

coarse but not fine.

EIBDWNSTPB (Power Down After Good Frame Received)

[Description]

This parameter represents the power down step when one good frame is

received after many successive bad frames within PWR_EIB_CNT.

[Type]


[Range and unit]

0~255 (unit: 0.25dB).

[Operating range]

0~255

[Recommended value]

2, namely, 0.5dB

[Setting tradeoffs]

A part of EIB algorithm parameter. Consider algorithm convergence during the

modification and modify many parameters at the same time.

3.6 Forward Fast Power Control Parameters (FFASTPC) [Command name] MOD FFASTPC (Base Station Controller Management\Configuration

Management\Algorithm Management\Modify Forward Fast Power Control

Parameter)



FPWRSTEP (Forward Power Control Step)

[Description]

This parameter represents the power adjustment step in the forward fast power

control when the BTS receives a power control bit. The up and down power

adjustment steps adopt this step.

[Type]

Parameter of A3 interface and Abis interface, used by BTS

[Range and unit]

1~4 (unit: 0.25dB)

[Operating range]

1~2

[Recommended value]

2, namely, 0.5dB

[Setting tradeoffs]

If the value of this parameter is set too large, the power control will be so

coarse that some forward transmit power may be wasted. If the value is set

too small, the power control will be so slow that the power increase could not

compensate the fast fading.

IS95SCHGAIN1 (IS95 Forward Power Control Sub-channel Gain 1)

[Description]

This parameter represents the power gain of forward power control

sub-channel relative to the forward traffic channel in the case of no soft handoff

branches. The forward power control sub-channel consists of some bits

extracted from FCH or DCCH, and it is a part of the forward traffic channel. In

the case of no soft handoff branches, the power demand of both forward power

control sub-channel and the forward traffic channel is the same. In the soft



handoff state, the service frame of the MS is the maximum ratio combination of

multi-path energies, but the power control sub-channel gain needs to be

demodulated individually on each branch. In this case, the power of the power

control sub-channel is required to be higher than the transmit power of the

traffic channel.

[Type]

Parameter of A3 interface and Abis interface, used by BTS. Also Um interface

parameter, used by MS (CAM)

[Range and unit]

0~127 (unit: 0.25dB).

[Operating range]

0~127

[Recommended value]

0, namely, 0dB

[Setting tradeoffs]

In the case of no soft handoff branches, the power of the forward power

control sub-channel is the same as that of the forward traffic channel


[Description]

This parameter represents the transmit power relationship between the forward

power control sub-channel and the traffic channel in the case of two soft

handoff branches. For other descriptions, refer to IS95 forward power control

sub-channel gain 1

[Type]





[Range and unit]

0~255 (unit: 0.25dB)

[Operating range]

0~127

[Recommended value]

12, namely, 3dB

[Setting tradeoffs]

None


[Description]

This parameter represents the transmit power relationship between the forward

power control sub-channel and the traffic channel in the case of three or more

soft handoff branches. For other descriptions, refer to IS95 forward power

control sub-channel gain 1

[Type]



[Range and unit]

0~127 (unit 0.25dB)

[Operating range]

0~127

[Recommended value]

19, namely, 4.75dB



[Setting tradeoffs]

None


[Description]

The value of IS2000SCHGAIN1 is larger than that of IS95SCHGAIN1, because

the power of IS2000 forward traffic channel is usually lower than that of IS95

forward traffic channel. To ensure the correctness of the reverse power control

bit, the IS2000 forward power control sub-channel gain should be larger

accordingly.

[Type]

Parameter of A3 interface and Abis interface, used by BTS.. Also Um interface

parameter, used by MS (ECAM)..

[Range and unit]

0~31 (unit: 0.25dB)

[Operating range]

0~31

[Recommended value]

12, namely 3dB

[Setting tradeoffs]

None


[Description]



In IS2000, this parameter represents the transmit power relationship between

the forward power control sub-channel and the traffic channel in the case of two

soft handoff branches. For details, refer to IS95 forward power control

sub-channel gain 1

[Type]


parameter, used by MS (ECAM)

[Range and unit]

0~31 (unit: 0.25dB)

[Operating range]

0~31

[Recommended value]

24, namely, 6dB

[Setting tradeoffs]

None


[Description]

In IS2000, this parameter represents the transmit power relationship between

the forward power control sub-channel and the traffic channel in the case of

three or more soft handoff branches. For details, refer to IS95 forward power

control sub-channel gain 1

[Type]


parameter, used by MS (ECAM)

[Range and unit]



0~31 (unit: 0.25dB)

[Operating range]

0~31

[Recommended value]

31, namely, 7.75dB

[Setting tradeoffs]

None

VINITFCH (Voice Service FCH Initial Eb/Nt Value) DINITFCH (Data Service FCH Initial Eb/Nt Value)

[Description]

This parameter represents the initial value for the forward FCH out loop power

control in the MS. The forward out loop power control is similar to the reverse

out loop power control in principle. For the specific description of this parameter,

refer to VINITFCH. They are set based on voice and data service separately.

[Type]

Um interface parameter, used by MS (ECAM).

[Range and unit]

0~255 (unit: 0.125dB)

[Operating range]

0~255

[Recommended value]

40, namely, 5dB

[Setting tradeoffs]

None



VMAXFCH (Voice Service FCH Max. Eb/Nt) DMAXFCH (Data Service FCH Max. Eb/Nt)

[Description]

This parameter represents the maximum set value of forward out loop FCH

Eb/Nt in the MS. They are set based on voice and data service separately.

[Type]


[Range and unit]

0~255 (unit: 0.125dB)

[Operating range]

48~80

[Recommended value]

80, namely, 10dB, this parameter is set to 114 in earlier VR002B03D006.

[Setting tradeoffs]

If the value of this parameter is set large, it is favourable for the communication

quality to maintain at a certain level under severe radio environments, but the

power control overshoot may be so large that the forward capacity would

decrease. If the value is set small, the call quality will be greatly degraded or

even call drops may be caused.

VMINFCH (Voice Service FCH Mini. Eb/Nt Value) DMINFCH (Data service FCH Mini. Eb/Nt Value)

[Description]

This parameter represents the minimum set value of forward out loop FCH

Eb/Nt in the MS. Refer to the [Description] in the max. set value of voice/data

service FCH EbNt. They are set based on voice and data service separately.

[Type]




[Range and unit]

0~255 (unit: 0.125dB)

[Operating range]

16~24

[Recommended value]

16, namely, 2dB

[Setting tradeoffs]


improvement of call quality will not be very significant, but the forward capacity

will decrease.

INITDCCH (DCCH Initial Eb/Nt Value) MAXDCCH (DCCH Max. Eb/Nt Value) MINDCCH (DCCH Min. Eb/Nt Value) [Description] Refer to FCH set value.

INITSCH1X (1X SCH Initial Eb/Nt Value Offset Relative to FCH) INITSCH2X (2X SCH Initial Eb/Nt Value Offset Relative to FCH) INITSCH4X (4X SCH Initial Eb/Nt Value Offset Relative to FCH) INITSCH8X (8X SCH Initial Eb/Nt Value Offset Relative to FCH) INITSCH16X (16X SCH Initial Eb/Nt Value Offset Relative to FCH) INITSCH32X (32X SCH Initial Eb/Nt Value OffsetRelative to FCH)

[Description]

The group of above parameters is used to calculate the initial value of the

forward out loop SCH EbNt in the MS. This initial value equals the set value of

the current SCH EbNt plus the value of this parameter, that is, the initial set

value of SCH EbNt offset value to FCH is a relative value. The advantage of



this representation is that the initial set value of SCH EbNt can be obtained

accurately according to the link state of the current FCH so that the set value of

the out loop SCH can be optimized quickly.

[Type]


[Range and unit]

-128 ~ 127, (unit: 0.125dB).

[Operating range]

-128 ~ 127

[Recommended value]

24, namely, 3dB

[Setting tradeoffs]

None

MAXSCH1X (1X SCH Max. Eb/Nt Value) MAXSCH2X (2X SCH Max. Eb/Nt Value) MAXSCH4X (4X SCH Max. Eb/Nt Value) MAXSCH8X (8X SCH Max. Eb/Nt Value) MAXSCH16X (16X SCH Max. Eb/Nt Value) MAXSCH32X (32X SCH Max. Eb/Nt Value)

[Description]

Refer to max. set value of FCH EbNt (FWDMAXFCH).

[Type]


[Range and unit]

0~255 (unit: 0.125dB)



[Operating range]

0~255

[Recommended value]

The specific recommended values are shown the table:

Rate Recommended value 1x 80

2x 80

4x 80

8x 88

16x 96

32x 96

[Setting tradeoffs]

None

MINSCH1X (1x SCH Mini. Eb/Nt value) MINSCH2X (2x SCH Mini. Eb/Nt Value) MINSCH4X (4x SCH Mini. Eb/Nt Value) MINSCH8X (8x SCH Mini. Eb/Nt Value) MINSCH16X (16x SCH Mini. Eb/Nt Value) MINSCH32X (32x SCH Mini. Eb/Nt Value)

[Description]

Refer to min. set value of FCH EbNt ((FWDMINFCH).

[Type]


[Range and unit]

0~255 (unit: 0.125dB)

[Operating range]



0~255

[Recommended value]

16, namely, 2dB

[Setting tradeoffs]

None

VFCHINITGAINFIX (Voice Service Forward FCH Initial Power Correction Value) DFCHINITGAINFIX (Data Service Forward FCH Initial Power Correction Value)

[Description]

This parameter provides a correction value for the calculated initial transmit

power. They are set based on voice and data service separately.

[Type]

Algorithm parameter

[Range and unit]

0~255 (unit: 0.25dB).

[Operating range]

0 ~ 16

[Recommended value]

16

[Setting tradeoffs]

If the value of this parameter is set large, the call quality can be ensured when

the call is established, but the calculated initial transmit power must be lower

than the maximum transmit power.



COUNTOFGAINRPAIRS (Number of Power Gain Pairs) [Description] This parameter is not used currently. 3 pairs of maximum gain and

minimum gain are specified in the protocol.

VFCHMAXGAINRO1 (Voice Service FCH Max. Gain 1) DFCHMAXGAINRO1 (Data Service FCH Max. Gain 1)

[Description]

This parameter represents the maximum transmit power of the forward traffic

channel when the call is not in the soft handoff state. For representation, refer

to section 3.1.3. They are set based on voice and data service.

[Type]

Parameter of A3 interface and Abis interface, used by BTS..

[Range and unit]

-255~0 (unit: 0.25dB).

[Operating range]

(Pilot channel gain - 5dB) ~ (pilot channel gain - 2dB)

[Recommended value]

Pilot channel gain - 3dB, that is, pilot gain= -28, this value is set to - 40. If the

pilot channel gain – 4dB, that is, pilot gain = - 28, the recommended value is

-44.

[Setting tradeoffs]

Under severe radio environments, if the value of this parameter is set large, the

call quality can maintain at a certain level, but the forward capacity would

decrease. If the value is set too small, the call quality will be greatly degraded

or even call drops may be caused.



VFCHMINGAINR1 (Voice Service FCH Mini. Gain 1) DFCHMINGAINR1 (Data Service FCH Mini. Gain 1)

[Description]

This parameter represents the minimum transmit power of the forward traffic

channel when the call is not in the soft handoff state. For the representation,

see section 3.1.3. They are set based on voice and data service.

[Type]


[Range and unit]

-255~0 (unit: 0.25dB). Refer to section 3.1.3

[Operating range]


[Recommended value]

Pilot channel gain – 17dB. If pilot gain is -28, this value is set to -96. For

example, pilot gain – 24dB, that is, if the pilot channel gain is -28, the

recommended value is -124.

[Setting tradeoffs]

Under good radio environments, if the value of this parameter is set small, the

call quality will not be degraded much while the forward capacity will greatly

increase. On the contrary, if the value is set large, the call quality will not be

improved much while the system capacity will greatly decrease.

VFCHMAXGAINR2 (Voice Service FCH Max. Gain 2) DFCHMAXGAINR2 (Data Service FCH Max. Gain 2)

[Description]


channel in the case of two soft handoff branches. Refer to voice/data service

max. gain of FCH 1. They are set based on voice and data service separately.



[Type]


[Range and unit]

-255~0 (unit: 0.25dB). See section 3.1.3

[Operating range]

(Pilot channel gain-24dB) ~ (pilot channel gain - 10dB)

[Recommended value]

Pilot channel gain - 3dB. For example, if the pilot channel gain is -28, the

recommended value is -40. Refer to “voice/data max. gain of FCH 1”

[Setting tradeoffs]

Refer to voice/data service min. gain of FCH 1.

VFCHMINGAINR2 (Voice Service FCH Mini. Gain 2)

DFCHMINGAINRO2 (Data Service FCH Mini. Gain 2)

[Description]


channel in the case of two soft handoff branches. Refer to voice/data service

max. gain of FCH 1. They are set based on voice and data service separately.

[Range and unit]

-255~0 (unit: 0.25dB). See section 3.1.3

[Operating range]


[Recommended value]

Pilot channel gain - 17dB. If pilot gain is -28, this value is set to -96. For

example, pilot gain - 24dB, that is, if the pilot channel gain is -28, the




[Setting tradeoffs]

Refer to voice/data service mini. gain of FCH 1.

VFCHMAXGAINR3 (Voice Service FCH Max. Gain 3) DFCHMAXGAINR3 (Data Service FCH Max. Gain 3)

[Description]

This parameter represents the maximum transmit power of the forward traffic

channel in the case of three or more soft handoff branches. Refer to voice/data

service max. gain of FCH 1. They are set based on voice and data service.

[Range and unit]

-255~0 (unit: 0.25dB). See section 3.1.3.

[Operating range]


[Recommended value]

Pilot channel gain -3dB. For example, if the pilot channel gain is -28, the


[Setting tradeoffs]

Refer to voice/data service max. gain of FCH 1.

VFCHMINGAINR3 (Voice Service FCH Mini. Gain 3) DFCHMINGAINR3 (Data Service FCH Mini. Gain 3)

[Description]


channel in the case of three or more soft handoff branches. Refer to voice/data

service max. gain of FCH 1. They are set based on voice and data service.

[Range and unit]




[Operating range]


[Recommended value]

Pilot channel gain - 17dB. If pilot gain is -28, this value is set to -96. For

example, pilot gain - 24dB, that is, if the pilot channel gain is -28, the


[Setting tradeoffs]

Refer to voice/data service mini. gain of FCH 1.

SCHINITGAIN1X (1X F-SCH Initial Tx. Gain) SCHINITGAIN2X (2X F-SCH Initial Tx. Gain) SCHINITGAIN4X (4X F-SCH Initial Tx. Gain) SCHINITGAIN8X (8X F-SCH Initial Tx. Gain) SCHINITGAIN16X (16X F-SCH Initial Tx. Gain) SCHINITGAIN32X (32X F-SCH Initial Tx. Gain)

[Description]

The parameters represent the initial transmit power in the forward fast power

control mode. For the representation of parameters, refer to 3.1.3. The

representation of R03 is different. In capacity test, set appropriately a small

forward initial transmit power to ensure the capacity.

[Type]

Parameter of A3 interface, used by BTS

[Range and unit]


[Operating range]

-255~0.



[Recommended value]

When pilot channel gain= -28, the specific recommended values are shown in

the following table:


1x -44

2x -44

4x -44

8x -32

16x -32

32x -28

[Setting tradeoffs]

The above parameters represent the initial transmit power of forward traffic

channel of IS2000 MS. When the IS2000 MS uses the forward fast power

control, the initial transmit power equals the maximum transmit power, and the

initial transmit power can drop quickly, too.

ENRC4TORC3 (Eb/Nt Offset of Forward RC4 to RC3)

[Description]

This parameter represents different offsets, which the BSC adds to the forward

out loop set values (initial value, maximum and minimum) according to different

RCs before delivering these values to the MS. the settings of all forward out

loop set values in the forward fast power control parameters table are set

based on RC3.

[Type]

Algorithm parameter

[Range and unit]

0~255 (unit: 0.125dB)

[Operating range]

0~255



[Recommended value]

2, namely, 0.25dB

[Setting tradeoffs]

None

ENRC5TORC3 (Eb/Nt Offset of Forward RC5 to RC3)

[Description]

Refer to EB/NT Offset of Forward RC4 to RC3

[Type]

Algorithm parameter

[Range and unit]

0~255 (unit: 0.125dB)

[Operating range]

0~255

[Recommended value]

2

[Setting tradeoffs]

None

FWDSCHMAXGAIN1X (1x F-SCH Max. Tx Power) FWDSCHMAXGAIN2X (2x F-SCH Max. Tx Power) FWDSCHMAXGAIN4X (4x F-SCH Max. Tx Power) FWDSCHMAXGAIN8X (8x F-SCH Max. Tx Power) FWDSCHMAXGAIN16X (16x F-SCH Max. Tx Power) FWDSCHMAXGAIN32X (32x F-SCH Max. Tx Power) [Description]



In the R03 version, set separately power control parameter of SCH with

different rates to implement the control with different rates. This parameter

represents the maximum transmit power of SCH with different rates in the

forward fast power control. For representation, see section 3.1.3.

[Type] ABIS interface, used by the BTS..

[Range and unit] -255~0, with the unit of 0.25dB. See section 3.1.3.

[Operating range] -255~0.

[Recommended value] When pilot channel gain= -28, the recommended value are specified in the

following table:


1x -44

2x -44

4x -36

8x -32

16x -24

32x -20

[Setting tradeoff] For setting of channel power gain, consider the relationship between capacity

and power source. The increase of power follows with that of interference.

FWDSCHMINGAIN1X (1x F-SCH Mini. Tx Power) FWDSCHMINGAIN2X (2x F-SCH Mini. Tx Power) FWDSCHMINGAIN4X (4x F-SCH Mini. Tx Power) FWDSCHMINGAIN8X (8x F-SCH Mini. Tx Power) FWDSCHMINGAIN16X (16x F-SCH Mini. Tx Power) FWDSCHMINGAIN32X (32x F-SCH Mini. Tx Power) [Description]



This parameter represents the minimum transmit power of SCH with different

rates in the forward fast power control. For representation, see section 3.1.3.

[Type] ABIS interface parameter, used by the BTS.

[Range and unit] -255~0, with the unit of 0.25dB. See section 3.1.3.

[Operating range] -255~0.

[Recommended value] When pilot channel gain =-28, the recommended values are specified in the

following table:


1x -80

2x -76

4x -72

8x -64

16x -52

32x -52

[Setting tradeoff] For setting of channel power gain, consider the relationship between capacity

and power source. The increase of power follows with that of interference.

3.7 Target FER (FER)

[Command name]

MOD FER (Base Station Controller Management\Configuration

Management\Algorithm Configuration ------Modify Target FER

Configuration)

For the representation of the FER, refer to 3.1.3.



FWDVCFER1 (F-FCH Voice Service Expected FER1)

[Description]

This parameter represents the target FER of forward FCH of voice call. For the

IS95 MS, the forward power control is the measurement report power control or

EIB power.

For the IS2000 MS, the forward power control is the fast power control. This

parameter is sent to the MS via the channel assignment message to determine

the forward out loop set value so that the actual FER can converge at the target

FER.

[Type]

IS95, algorithm parameter, used by SPU or FMR power control module;

IS200, Um interface parameter, used by MS..

[Range and unit]

0~30

[Operating range]

0~10, namely, 1% ~5%

[Recommended value]

2, namely, 1%

[Setting tradeoffs]

If the forward target FER is set small, the quality of forward link through the

forward power control should be high and the required forward power should

be high. Vice versa. In usual cases, the forward FER is set to 1% ~ 3% and

there is no great difference in the forward call quality. To save the forward

power and increase the forward capacity, the value of this parameter can be

set large properly.

REVVCFCHFER1 (R-FCH Voice Service Expected FER1)

[Description]



This parameter represents the target FER of reverse FCH of voice call. This

parameter is used by the power control module of FMR to calculate the reverse

out loop set value so that the actual FER converge at the target FER.

[Type]

Algorithm parameter, used by the power control module of FMR..

[Range and unit]

0~30

[Operating range]

0~10, namely, 1% ~ 5%

[Recommended value]

2

[Setting tradeoffs]

If the reverse target FER is set small, the quality of reverse link via the reverse

power control should be high and the required reverse power should be high.

Vice versa. In usual cases, the forward FER is set to 1% ~ 3% and there is no

great difference in the call quality. To save the MS power and increase the

reverse capacity, the value of this parameter can be set large properly.

FWDVCDCCHFER1 (F-DCCH Voice Service Expected FER1) REVVCDCCHFER1 (R-DCCH Voice Service Expected FER1) [Description] Refer to F/R-FCH Voice Service Expected FER1.

FWDDATFCHFER1 (F-FCH Data Service Expected FER1)

[Description]

Refer to FWDVCFCHFER1. This parameter is designated for data service

calls.



[Type]

IS95, algorithm, used by power control modules of SPU or FMR;

IS200, Um interface, used by MS

[Range and unit]

0~30

[Operating range]

0~10, namely 1%~5%

[Recommended value]

2, namely, 1% (No matter whether voice service or data service, signalling

messages will be transferred on FCH, so the target FER can not be too high.)

[Setting tradeoffs]

Refer to FWDVCFCHFER1.

REVDATFCHFER1 (R-FCH Data Service Expected FER1)

[Description]

Refer to REVVCFCHFER1. This parameter is designated for data service calls.

[Type]

Algorithm parameter, used by power control module of FMR

[Range and unit]

0~30

[Operating range]

0~10, namely 1%~5%

[Recommended value]



2, namely, 1% (No matter whether voice service or data service, signalling

messages will be transferred on FCH, so the target FER can not be too high.)

[Setting tradeoffs]

Refer to REVVCFCHFER1.

FWDDATDCCHFER1 (Forward DCCH Data Service Expected FER1) REVDATDCCHFER1 (Reverse DCCH Data Service Expected FER1) [Description] Refer to forward/reverse FCH expected FER1 of data service. FWDDATSCHFER1X (Forward 1X SCH Target FER) FWDDATSCHFER2X (Forward 2X SCH Target FER) FWDDATSCHFER4X (Forward 4X SCH Target FER) FWDDATSCHFER8X (Forward 8X SCH Target FER) FWDDATSCHFER16X (Forward 16X SCH Target FER)

FWDDATSCHFER32X (Forward 32X SCH Target FER)

[Description]

The above parameters represent the target FERs of the forward SCH with

different rates. In the forward fast power control, this parameter is sent to the

MS through the SCH assignment message to determine the set value of

forward out loop SCH so that the actual FER can converge at the target FER.

[Type]

Um interface, used by MS

[Range and unit]

0~31

[Operating range]

0~10, namely, 1%~5%

[Recommended value]

If this value is set to 10, namely, 5%, as shown the following table




2x 4

4x 4

8x 6

16x 6

32x 10

[Setting tradeoffs]

If the reverse target FER is set small, the quality of reverse link via the reverse

power control should be high and the required reverse power should be high.

Vice versa. Target FER of SCH is higher than that of FCH because the

real-time of voice service is higher than that of data service and the error code

can be corrected through the resending in the data service. High-voice SCH

requires high power and lower FER will waste more power. But the maximum

target FER should not be more than 15%.

REVDATSCHFER1X (Reverse 1X SCH Target FER) REVDATSCHFER2X (Reverse 2X SCH Target FER) REVDATSCHFER4X (Reverse 4X SCH Target FER) REVDATSCHFER8X (Reverse 8X SCH Target FER) REVDATSCHFER16X (Reverse 16X SCH Target FER) REVDATSCHFER32X (reverse 32X SCH Target FER) [Description]

The above parameters represent the target FERs of the forward SCH with

different rates. In the reverse closed loop power control, this parameter is sent

to the MS through the SCH assignment message to determine the set value of

reverse out loop SCH so that the actual FER can converge at the target FER.

[Type]

Um interface, used by MS


[Operating range]



0~10, namely, 1%~5%

[Recommended value] If this value is set to 10, namely, 5%, as shown the following table


2x 4

4x 4

8x 6

16x 6

32x 10

[Setting tradeoff] If the reverse target FER is set small, the quality of reverse link through the

reverse power control should be high and the required reverse power should

be high. Vice versa. To save the MS power and increase the reverse capacity,

the value of this parameter can be set large properly, with the maximum of

15%.

4. Handoff Parameters

4.1 Module Handoff Parameter (MHOPARA) [Command Name] MOD BSCHO (Base Station controller Management \ Configuration

Management \ Algorithm Configuration \ Modify Inter-BSC Handoff

Parameters)

LST BSCHO (Base Station controller Management \ Configuration

Management \ Algorithm Configuration \ Query Inter-BSC Handoff

Parameters)

This table configures module handoff parameters and the parameters are the

same for each carrier of the whole BSC.

MAXSHO (Max Number of SHO Branches)



[Description]

This parameter represents the maximum number of branches in the target

active set. According to the protocol, the active set of the MS supports a

maximum of 6 soft handoff branches. When the BSC makes a soft handoff

decision, it will, according to this parameter, restrict the number of branches in

the target active set of the soft handoff.

[Type]

Algorithm parameter

[Range and unit]

2~6

[Operating range]

3~6

[Recommended value]

3

[Setting tradeoffs:]

If the value is set too large, the soft handoff ratio will increase and more

forward resources will be occupied, so the forward capacity will be wasted. If

the value is set too small, the soft handoff ratio will decrease, but the soft

handoff gain can not be rationally utilized, so the quality of service will be

degraded. If system traffic is less, but resources are rich, to enhance QoS and

lower call drop ratio, set this parameter to 4.

INTRABSCHHOSW (Intra-BSC HHO Macro Diversity Switch)

[Description]

This parameter indicates whether the macro diversity function of intra-BSC

hard handoff is enabled or not when an intra-BSC hard handoff is performed.

[Type]



Algorithm parameter

[Range and unit]

0~1. 0-OFF, 1-ON

[Operating range]

0~1

[Recommended value]

1


When the macro diversity function of intra-BSC hard handoff is enabled, the MS

can simultaneously perform hard handoffs to multiple target carriers. In this way,

it is helpful to utilize the soft handoff gain in time and improve the hard handoff

success ratio. However, if too many hard handoff target carriers are configured,

excessive resources may be occupied transiently.

INTERBSCHHOSW (Inter-BSC HHO Macro Diversity Switch)

[Description]

This parameter indicates whether the macro diversity function of inter-BSC

hard handoff is enabled or not when an inter-BSC hard handoff is performed.

[Type]

Algorithm parameter

[Range and unit]

0~1. 0-OFF, 1-ON

[Operating range]

0~1

Recommended value:

0




When the macro diversity function of inter-BSC hard handoff is enabled, the MS

can simultaneously perform hard handoffs to multiple target carriers. In this way,

it is helpful to utilize the soft handoff gain in time and improve the hard handoff

success ratio. However, if too many hard handoff target carriers are configured,

excessive resources may be occupied transiently.

HHOMAXTARGNUM (Max Number of HHO Branches)

[Description]

This parameter represents the maximum number of branches in the target

active set of hard handoff when the macro diversity function of hard handoff is

enabled, According to the protocol, the active set of the MS supports a

maximum of 6 hard handoff branches.

[Type]

Algorithm parameter

[Range and unit]

1~6

[Operating range]

1~6

[Recommended value]

6

Setting tradeoffs:

If only the hard handoff algorithms through which the strength of the target pilot

of hard handoff can be measured (such as same-frequency hard handoff

algorithm, mobile assisted hard handoff algorithm and pilot beacon hard

handoff algorithm) are used, the target of hard handoff is accurate since the

strength of the target pilot is known. The value of this parameter is

recommended to be set to “3”, consistent with the recommended value of the



Max Number of SHO Branches. If the hard handoff algorithms (such as

handdown hard handoff algorithm and direct hard handoff algorithm) through

which the strength of the target pilot of hard handoff can not be measured, the

target of hard handoff may be inaccurate since the strength of the target pilot is

unknown and is obtained from the data configuration. Therefore, the value of

this parameter can be set large to increase the hard handoff success ratio.

MAHHOSW (MAHHO Switch)

[Description]

This parameter indicates whether the mobile assisted hard handoff function is

enabled or not when a mobile station which supports IS95B above performs the

different-frequency hard handoff. According to the protocol, only the MS

supporting IS95B above can search different frequencies in conversation.

[Type]

Algorithm parameter

[Range and unit]

0~1. 0-OFF, 1-ON

[Operating range]

0~1

[Recommended value]

0


When the MS supporting IS95B above performs the different-frequency hard

handoff, the MS can use the mobile assisted hard handoff algorithm without

configuration of any new hardware. The MS can automatically measure the

strength of the target pilot of different-frequency hard handoff. The target of

hard handoff is accurate and the success ratio is high. However, when the MS

measures the strength of target pilot of different-frequency hard handoff, it will



interrupt the communication of the serving frequency. As a result, the call

quality will be degraded. The mobile assisted hard handoff algorithm is usually

recommended when the MS supporting IS95B above performs the

different-frequency hard handoff.

BEACONSW (Pilot Beacon HHO Switch)

[Description]

This parameter indicates whether the pilot beacon hard handoff function is

enabled or not.

[Type]

Algorithm parameter

[Range and unit]

0~1. 0-OFF, 1-ON

[Operating range]

0~1

[Recommended value]

0


If the pilot beacon hard handoff algorithm is used to perform different-frequency

hard handoff, pilot beacon hardware should specially be configured.

Consequently, network cost increases. If pilot beacon is added, interference to

the system increases.

When pilot beacon hard handoff function is enabled, the coverage of pilot

beacon should also be consistent with the coverage of corresponding true

pilot. When pilot beacon is used to perform different-frequency hard handoff,

the MS 95A also can search different-frequency signal strength. It is

applicable to the MS of each type, with high success ratio.



PLTPOLLMINNUM (Branch Number at Pilot Pollution)

[Description]

Only when the number of pilots whose strength is larger than T_ADD in PSMM

is equal to or greater than the value of this parameter, can we say have pilot

pollution. This parameter is one condition which is used to judge whether the

pilot pollution exists in the system.

[Type]

Algorithm parameter

[Range and unit]

4~6

[Operating range]

4~6

[Recommended value]

6


If the value of this parameter is set too large, the pilot pollution decision

threshold of the system judges will increase. Otherwise, the threshold will

decrease.

PLTRTHRS (Relative Threshold at Pilot Pollution)

[Description]

Only when the strength difference between the strongest pilot and the second

strongest pilot in PSMM is less than or equal to the value of this parameter, can

we say have pilot pollution. This parameter is another condition which is used

to judge whether the pilot pollution exists in the system.

[Type]



Algorithm parameter

[Range and unit]

0~63 (unit: -0.5dB), corresponding to 0~-31.5dB.

[Operating range]

0~28

[Recommended value]

4


If the value of this parameter is set too large, the threshold by which the system

judges pilot pollution will decrease. Otherwise, the threshold will increase.

MAXDIST (Max Distance between Neighbor Cell and Serving Cell)

[Description]

This parameter is one of BSC parameters detecting the absent configuration of

neighbour cell. The MS reports the detected PN to the BSC via PSMM or

CFSRPM. If the PN does not exists in the active set, nor in the neighbor set,

the BSC will search the corresponding target cell of the PN among cells whose

distances from the serving cell of the MS are less than the value of this

parameter.

[Type]

Algorithm parameter

[Range and unit]

0--65535 (unit: 100m)

[Operating range]

0--1000

[Recommended value]

100



[Setting tradeoff]

If the cell radius in the network is large, the value of this parameter can be set

large. Otherwise, the value can be set small.

MAXCONFAILTIMES (Max Number of Successive HO Failures to Start Penalty)

[Description]

This parameter is one of BSC parameters punishing handoffs. The soft handoff

request successively originated to a carrier and fail, cause is the radio resource

request failure or the failure of establishment of terrestrial resource. If a soft

handoff request originated to a carrier fails because of the radio resource

request failure or the failure of establishment of terrestrial resource, the soft

handoff request will be successively originated to the carrier (因果关系反

了).When the number of successive failures exceeds the value of this

parameter, any soft handoff will be prohibited in this carrier when the BSC

makes the soft handoff decision within a period of time.

[Type]

Algorithm parameter

[Range and unit]

1~5

[Operating range]

1~5

[Recommended value]

3




If the value of this parameter is set too large, the start handoff Penalty threshold

will increase. Otherwise, the threshold will decrease.

4.2 Handoff Parameters (HOPARA) [Command Name] MOD HO (Base Station controller Management \ Configuration Management \

Algorithm Configuration \ Modify HandOff Parameters)

SRCHWINA (Search Window Size for the Active Set and Candidate Set)

[Description]

This parameter defines the size of the search window used when the MS

searches pilots in the active and candidate sets. The MS searches these pilots,

with their first arriving available multi-paths as their search centres, respectively.

This parameter is only dependent on the multi-paths of pilots, but independent

of the relative propagation delay between pilots.

[Type]

Um interface parameter (SPM/ESPM/ITSPM and EHDM/GHDM/UHDM)

[Range and unit]

0~15 (For details, refer to Table 4-1)

Table 4-1 Search window size

[Operating range]



5~9 (20~80chips)

[Recommended value]

5 (20chips)


According to the local propagation delay, the pilot signals after the propagation

delay should all fall into the search window of the active set. If the value of this

parameter is set too small, some useful signals in the active set may fall

beyond the search window. These signals beyond the search window will

cause interference, so the link quality may be affected greatly. If the value of

this parameter is set too large, some useless signals may fall into the search

window, so the link quality may also be affected. A large search window will

also make the MS search neighbor pilots so slowly that the handoff could not

be triggered in time. Thus the system performance decreases.

SRCHWINN (Search Window Size for the Neighbour Set)

[Description]


searches pilots in the neighbor set. The MS searches pilots in the neighbor set,

with the first arriving available multi-paths of the reference pilot as the time

reference, and PN offset of neighbor pilot as the search centre. Therefore, this

parameter is not only related to the multi-paths of neighbor pilots, but also their

propagation delay relative to the reference pilot.

[Type]

Um interface parameter (SPM/ESPM/ITSPM and GHDM/UHDM)

[Range and unit]


[Operating range]

8~11



[Recommended value]

8 (60chips)


The value of this parameter should be set according to the multi-paths of

neighbor pilots and their propagation delay relative to the reference pilot to

ensure all neighbor pilot signals fall into the search window of the neighbor set.

The time reference of the search window is the first arriving multi-path of the

reference pilot and the search centre is the PN offset of neighbor pilots. If the

value of this parameter is set too small, the neighbor pilot signals may fall

beyond the search window. Some neighbor pilots may be missed and can not

be added to the active set. As a result, the soft handoff can not be triggered

normally, resulting in a call drop. If the value of this parameter is set too large,

the time that the MS searches each neighbor pilot may increase. Further, the

search of neighbor pilots will slow down. As a result, the soft handoff may be

delayed and the handoff performance will be affected potentially.

SRCHWINR (Search Window Size for the Remaining Set)

[Description]


searches pilots in the remaining set. The MS searches pilots in the remaining

set in the way it searches pilots in the neighbor set, with the first arriving

available multi-path of the reference pilot as the time reference, and PN offsets

of pilots in the remaining set as the search centre.

[Type]

Um interface parameter (SPM/ESPM/ITSPM and GHDM/UHDM)

[Range and unit]


[Operating range]



9~12

[Recommended value]

9 (80chips)


If the value of this parameter is set too small, some useful pilots in the

remaining set may be missed. As a result, the function of BSC detecting the

absent configuration of neighbour cell can not be utilized to the full. If the value

of this parameter is set too large, the MS may search other irrelevant signals,

and besides, the time that the MS searches pilots in the remaining set will

increase, so the search speed of the MS will slow down.

NGBRMAXAGE (Neighbour Set Max AGE)

[Description]

This parameter defines the maximum duration of life of pilots in the neighbour

set. The MS provides a counter for each pilot in the neighbour set. When the

MS receives the Neighbour List Update Message (NLUM), it will increase the

counters of the original pilots in the neighbour set by one. If the counter of a

pilot exceeds the value of this parameter, the MS will remove this pilot from the

neighbor set. If the value of this parameter is set to “0’, each time the MS

receives NLUM, the MS will remove all pilots in the original neighbor set so that

the MS will use the contents in the latest NLUM. If the value is set to “2”, when

a pilot falls from the active set or candidate set back to the neighbor set but

there is no such pilot in two successive NLUMs, this pilot will be removed from

the neighbour set.

[Type]

Um interface parameter (SPM/ESPM/ITSPM).

[Range and unit]

0~15



[Operating range]

0~3

[Recommended value]

0


If the value of this parameter is set too large, a pilot which falls from the active

set or candidate set back to the neighbor set can stay a longer time, so it is

possible that new neighbor pilots in the NLUM will be excluded from the

neighbor set of the MS (when the number of pilots exceeds the maximum of

pilots in the neighbor set of the MS).If the value is set to "0”, each time the MS

receives the NLUM, the MS will completely use the neighbor pilot list in the

NLUM as a new pilot set.

TADD (Pilot Good_Available Threshold)

[Description]

This parameter defines when the MS shifts a pilot from the neighbor set to the

candidate set and sends the Pilot Strength Measurement Message (PSMM) to

the BSC. Only when the strength of a neighbor pilot exceeds the value of this

parameter, can it be added to the active set. Both the MS and BSC use this

parameter.

[Type]


[Range and unit]

-630~0 (unit: -0.5dB

[Operating range]

-24~-28

[Recommended value]



-28


If the value of this parameter is set too large (such as more than -24), the soft

handoff threshold will increase, so the soft handoff area and the soft handoff

ratio will decrease. But some areas may be not covered. Since the soft handoff

gain can not be fully utilized, call drops may occur. If the value is set too small

(such as less than -28), the soft handoff threshold will decrease, so the soft

handoff area and the soft handoff ratio will increase. As a result, more forward

channels will be occupied and the forward capacity will decrease.

TDROP (Pilot Mini. Available Threshold)

[Description]

If the signal strength of a pilot in the active set or candidate set is lower than

the value of this parameter, the MS will start the handoff removal timer for the

pilot (Refer to T_TDROP).

[Type]


[Range and unit]

-63~0 (unit: -0.5dB)

[Operating range]

-28~-32

[Recommended value]

-32


If the parameter is set to a too large value (such as more than -28), the soft

handoff threshold is very high, so an available signal is quickly removed from

the active set. This available signal may cause interference after it is removed



from the active set, resulting in call drops. If the value is set too small (such as

less than -32), the soft handoff threshold will decrease, so it is difficult to

remove a pilot from the active set. As a result, the soft handoff ratio will

increase and the forward capacity will be wasted.

TTDROP (Pilot Removal Timer Length)

[Description]

If the signal strength of a pilot in the active set or candidate set is lower than

the value of the parameter T_DROP, the MS will start the handoff removal timer

for the pilot (Refer to T_DROP).If the signal strength of the pilot exceeds the

value of the parameter T_DROP, the MS will reset and close the timer. When

the handoff removal timer for a pilot in the candidate set expires, the MS will

automatically shift the pilot to the neighbor set. When the handoff removal timer

for a pilot in the active set expires, the MS will report a Pilot Strength

Measurement Message (PSMM) to the BSC to the BSC, reminding it of

removing the pilot.

[Type]


[Range and unit]

0~7. Table 4-2 lists the actual timer expiration of these values.

Table 4-2 Handoff removal timer expirations

[Operating range]



2~5

[Recommended value]

3 (4 seconds)


If the value of this parameter is set too large, the pilot with a low strength in the

active set will stay there for a long time. In this way, the soft handoff ratio will

increase and some forward traffic channels will be wasted. If the value of this

parameter is set too small, when the strength of a pilot in the active set

fluctuates normally, namely, the strength becomes lower transiently; it is very

likely that this pilot will be removed from the active set. In this way, the

T_TDROP can not take effect in the handoff delay, so handoffs will frequently

occur.

TCMP (Pilot Compare Threshold)

[Description]

If the signal strength of a pilot in the candidate set exceeds T_COMP/2 of a

pilot in the active set, the MS will report a PSMM to the BSC, reminding it of

performing a handoff.

[Type]


[Range and unit]

0~15 (unit: 0.5dB)

[Operating range]

4~6

[Recommended value]

5




If the value of this parameter is set too small, it is very easy for the pilots in the

candidate set to replace those in the active set, so handoffs will frequently

occur. If the value is set too large, it is hard for the pilots in the candidate set to

replace those in the active set, so the interference of pilots in the candidate will

exist all the time, resulting in a decrease of the forward capacity.

SOFTSLOPE (Soft HO Increasing Slope Ratio)

[Description]

This parameter defines the slope in the dynamic threshold soft handoff function.

When the dynamic threshold soft handoff function is activated, this slope will be

used to add or remove a soft handoff branch. This parameter is used by the MS.

Only the MS which supports IS95B above can support the dynamic threshold

soft handoff function.

[Type]

Um interface parameter (ESPM/ITSPM and GHDM/UHDM).

[Range and unit]

0~63 (unit: 1/8)

[Operating range]

16~24

[Recommended value]

0. That is to say, the dynamic threshold soft handoff function is not used. The

value of this parameter is recommended to be set to “18” (standing for 2.25)

when this function needs to be started.

[Setting tradeoffs]



If the value of this parameter is set to “0”, it means the dynamic threshold soft

handoff function is disabled. Otherwise, it means the function is enabled. The

smaller value of this parameter, the higher dynamic addition and deletion

thresholds calculated on condition that the strength of pilots in the active set

remains unchanged. In this case, it is more difficult to add pilots to the active

set, but less difficult to remove them from the active set. As a result, the soft

handoff ratio decreases. However, the soft handoff gain can not be utilized to

the full, so it is more possible that call drops occur. The larger value of this

parameter, the lower dynamic addition and deletion thresholds calculated on

condition that the strength of pilots in the active set remains unchanged. In this

case, the soft handoff ratio will increase. As a result, the soft handoff will

consume excessive forward power, resulting in the decrease of effective

forward capacity.

ADDINTERC (Soft Handoff Pilot Adding Intercept)

[Description]

This parameter defines the pilot-adding intercept in the dynamic threshold soft

handoff function. The BSC set this parameter in complement of binary for the

MS.

[Type]


[Range and unit]

-32~31, (unit: 0.5dB)

[Operating range]

0~6

[Recommended value]

6, namely, 3dB




The smaller the value of this parameter is, the lower the calculated dynamic

addition threshold is. As a result, it is easier to add pilots in the neighbor set to

the active set, and the soft handoff ratio will increase, but the forward capacity

will decrease. The larger the value of this parameter is, the higher the

calculated dynamic addition threshold is. As a result, it is more difficult to add

pilots in the neighbor set to the active set, and the soft handoff ratio will

decrease, but the call drop ratio will increase since the soft handoff ratio can

not be utilized to the full.

DROPINTERC (Soft HO Pilot Removing Intercept)

[Description]

This parameter defines the pilot-removing intercept in the dynamic threshold

soft handoff function. The BSC set this parameter in complement of binary for

the MS.

[Type]


[Range and unit]

-32~31, (unit: 0.5dB)

[Operating range]

0~6

[Recommended value]

6, namely, 3dB

Setting tradeoffs:


deletion threshold is. As a result, it is more difficult to remove pilots from the



active set, and the soft handoff ratio will increase, but the forward capacity will

decrease. The larger the value of this parameter is, the higher the calculated

dynamic deletion threshold is. As a result, it is easier to remove pilots in the

active set, and the soft handoff ratio will decrease, but the call drop ratio will

increase since the soft handoff gain can not be utilized to the full.

DYNSHOSLOPE (Dynamic Threshold Slope for Adding Branch to Active Set)

[Description]

The function of this parameter is basically the same as that of SOFT_SLOPE

used by the MS to calculate dynamic threshold. The only difference is that this

parameter is internally used when the BSC makes a soft handoff decision.

[Type]

Algorithm parameter

[Range and unit]

0~63 (unit: 1/8)

[Operating range]

16~24

[Recommended value]

18

[Setting tradeoffs]

For the setting of this parameter, refer to SOFTSLOPE. The smaller the value

of this parameter is, the higher the calculated soft handoff threshold is. As a

result, the soft handoff ratio will decrease, but the call drop ratio will increase

since the soft handoff gain can not be utilized to the full. The larger the value of

this parameter is, the lower the calculated soft handoff threshold is. As a result,

it is easier to add pilots in the neighbor set to the active set. In this way, the soft



handoff ratio will increase to ensure the link quality, but excessive forward

power will be consumed, resulting in a decrease of forward capacity.

DYNSHOINTERCEPT (Dynamic Threshold Intercept for Adding Branch to Active Set)

[Description]

The function of this parameter is basically the same as that of ADDINTERC

used by the MS to calculate dynamic threshold. The difference is that this

parameter is internally used when the BSC makes a soft handoff decision.

[Type]

Algorithm parameter

[Range and unit]

-32~31, (unit: 0.5dB).

[Operating range]

0~6

[Recommended value]

6, namely, 3dB



soft handoff threshold is. As a result, the soft handoff ratio will increase, but a

waste of the forward capacity may be caused. The larger the value of this

parameter, the higher the calculated dynamic soft handoff threshold is. As a

result, the soft handoff ratio will decrease, but the call drop ratio will increase

since the soft handoff ratio can not be rationalized.



SOFTERHOGAIN (Softer Handoff Gain)

[Description]

When the BSC activates the softer handoff preferred function, it will use this

parameter to add a gain to the pilot which has the softer handoff relationship in

the PSMM so that this pilot could be first added to the target active set of the

soft handoff. By default, the softer soft handoff preferred function of the BSC is

currently disabled

[Type]

Algorithm parameter

[Range and unit]

0~63 (unit: 0.5dB)

[Operating range]

0~6

[Recommended value]

0


The larger the value of this parameter is, the higher priority will be given to the

pilot which has the softer handoff relationship in the neighbor set to be added to

the active set. The smaller the value is, the lower priority will be given to the

pilot which has the softer handoff relationship in the neighbor set.

4.3 Pilot Handoff Algorithm Switch Parameters (PHOALG) [Command Name] MOD PHOALG (Base Station controller Management \ Configuration

Management \ Algorithm Configuration \ Modify Pilot Handoff Algorithm

Switch Parameters)



SF (Same-Frequency HHO Switch)

[Description]

This parameter indicates whether the call on this carrier is allowed to perform

the same-frequency hard handoff.

[Type]

Algorithm parameter

[Range and unit]

0~1. 0-OFF, 1-ON

[Operating range]

0~1

[Recommended value]

0


This parameter should be configured according to the actual situation. If the

carrier exists in the neighbor cell of the same frequency of a different BSC and

there is no A3/A7 interface between the two BSCs, when the same-frequency

hard handoff is necessary, the algorithm switch should be set “ON”.

HD (Handdown HHO Switch)

[Description]


the handdown hard handoff.

[Type]

Algorithm parameter

[Range and unit]



0~1. 0-OFF, 1-ON

[Operating range]

0~1

[Recommended value]

0

[Setting tradeoffs]

This parameter should be configured according to the actual situation. Suppose

the source cell and target cell share the same frequencies and the source cell

has more frequencies available than the target cell. When the MS originate a

call on the available frequency in the source cell moves away from the source

cell, the call can do handoff to the same frequency in the target cell via the

handdown hard handoff.

DRCT (Direct HHO Switch)

[Description]


the direct hard handoff.

[Type]

Algorithm parameter

[Range and unit]

0~1. 0-OFF, 1-ON

[Operating range]

0~1

[Recommended value]

0




This parameter should be configured according to the actual situation. If the

source cell and target cell havn't same frequencies, the handdown hard handoff

will be unavailable. For the IS95-compliant MS, the direct hard handoff

algorithm together with the macro diversity function of the hard handoff can also

ensure the hard handoff success ratio.

4.4 Same-Frequency Hard HO Parameters (HHOSAMEFREQPARA)

[Command Name] MOD HHOSF (Base Station controller Management \ Configuration

Management \ Algorithm Configuration \ Modify Same-Frequency HHO

Parameters ).

TADDHHOSF (Same-frequency HHO Serving Carrier Threshold)

[Description]

When the signal strength of pilots in the target active set of the soft handoff is

lower than the value of this parameter, and the signal strength of pilots in the

target active set of the same-frequency hard handoff is higher than the value of

the parameter THHOSFABSTHRS, the same-frequency hard handoff will be

triggered.

[Type]

Algorithm parameter

[Range and unit]

-63~0 (unit: -0.5dB).

[Operating range]

-14~-32

[Recommended value]



-22


The smaller the value of this parameter is (such as this values is less than -32),

the lower the signal strength in the source cell becomes when the MS perform

handoff from the source cell to the target cell. As a result, the same-frequency

hard handoff is triggered later. There exists strong interference resulting from

the same frequencies in the hard handoff zone. If the signal strength in the

source cell is low, it is very likely that the MS cannot receive the EHDM issued

by the BSC at the side of the source cell, so the hard handoff will fail. If the

value of this parameter is set too larger (such as more than -14), the condition

of triggering a same-frequency hard handoff is very easy to satisfy. In this case,

the triggering of hard handoff mainly depends on the Same-frequency HHO

target carrier threshold.

THHOSFABSTHRS (Same-frequency HHO Target Carrier Threshold)

[Description]

When the signal strength of pilots in the target active set of the soft handoff is

lower than the value of the parameter TADDHOSF, and the signal strength of

pilots in the target active set of the same-frequency hard handoff is higher than

the value of the parameter THHOSFABSTHRS, the same-frequency hard

handoff will be triggered.

[Type]

Algorithm parameter

[Range and unit]

-63~0 (unit: -0.5dB)

[Operating range]

-10~-28

[Recommended value]



-18


The smaller the value of this parameter (such as less than -28) is, the lower the

signal strength in the target cell which is required to trigger the same-frequency

hard handoff is. So the condition of triggering the same-frequency hard handoff

is very easy to satisfy. However, if the signal strength in the target cell is not

high enough, it will be difficult for the MS to capture the channel in the target

cell. As a result, the hard handoff fails. The larger the value of this parameter is

(such as larger than -10), the higher the signal strength in the target cell which

is required to trigger the same-frequency hard handoff is. In this way, it is very

easy for the MS to capture the channel in the target cell when the

same-frequency hard handoff takes place, but it may be more difficult to trigger

a same-frequency hard handoff.

THHOSFRELTHRS (Same-frequency HHO Relative Threshold)

[Description]

When the difference between the signal strength of pilots in the target active

set of the same-frequency hard handoff and that in the target active set of the

soft handoff is higher than the value of this parameter, a same-frequency hard

handoff will be triggered.

[Type]

Algorithm parameter

[Range and unit]

0~63 (unit: 0.5dB), corresponding to 0~31.5dB.

[Operating range]

2~16

[Recommended value]

8



Setting tradeoffs:

The larger the value of this parameter is, the stronger the signals in the target

cell are than those in the source cell when a hard handoff is to take place. In

this case, it is easier for the MS to capture the forward channel in the target cell.

However, since the signal strength in the source cell is low now, it is very likely

that the MS cannot receive the HDM from the source cell. The smaller the

value of this parameter is, the more easily the hard handoff will be triggered. In

this way, the quality of the forward channel in the source cell will not become so

poor that the MS could receive the HDM from the source cell. But it is not

ensured that the MS can capture the forward channel in the target cell.

4.5 Candidate Pilot Search Control Parameters (CFSCPARA) [Command Name] MOD CFSC (Base Station Controller Management \ Configuration

Management \ Algorithm Configuration \ Modify Candidate Pilot Search

Control Parameters).

SRVFRQECTHRS (Total Rx Power Threshold of Serving Frequency) [Description] This parameter represents the total receiving power threshold of serving

frequency. When MS delivers candidate frequency search request message, if

the search is periodical, MS determines whether to start or stop searching for

different-frequency based on the parameter and SRVFRQECIOTHRS.

[Type] Um interface (CFSRQM)

[Range and unit] 0--31(unit: the conversion relation exists with actual power. Refer to the

[setting tradefoff])


[Recommended value]



31

[Setting tradeoff] If MS is not required to determine whether to start or stop the searching for

different-frequency based on total receiving power of serving frequency, this

parameter must be set to “11111”(that is 31). Otherwise, if you want to MS to

start different-frequency search when total receiving power of serving

frequency is less than total_ec_thresh and stop different-frequency search

when total receiving power of serving frequency is higher than total_ec_thresh,

the parameter must be set to .

SRVFRQECIOTHRS (Total EC/IO Threshold of Serving Frequency) [Description] This parameter represents total pilot Ec/lo threshold of serving frequency.

When MS delivers candidate frequency search request message, if the search

is periodical, MS determines whether to start or stop searching for

different-frequency based on the parameter and SRVFRQEECTHRS.


[Range and unit] -31--0, Unit: 0.5dB,

[Operating range] -14-- -28, that is, -31

[Recommended value] -31

[Setting tradeoff] If MS is not required to determine whether to start or stop the searching for

different-frequency based on total pilot Ec/lo of serving frequency, this

parameter must be set to “-31”. Otherwise, if you want to MS to start

different-frequency search when total pilot Ec/lo of serving frequency is less

than total_ec_io_thresh and stop different-frequency search when total

receiving power of serving frequency is higher than total_ec_io_thresh, the

parameter must be set to .



If the parameter is set to -20, it indicates that MS starts different-frequency

search when total Ec/lo of serving frequency is less than -10dB.

DRXPWRTHRS (Rx Power Difference Threshold) [Description] This parameter represents the difference of receiving power cand_freq_pwr of

candidate frequency and receiving power serving_freq_pwr of serving

frequency. And the power difference between candidate frequency and

serving frequency is set to minimum_power_diff. When the actual the

difference between candidate frequency and serving frequency is less than

the threshold, MS stops the search. MS also uses the parameter during the

hard handoff. If the power difference between target frequency and serving

frequency is less than the threshold, MS returns hard handoff failure to

original channel.


[Range and unit] 0--31(unit: the conversion relation exists with actual power. Referee to

[Setting Tradeoff])



[Setting tradeoff] If MS is not required to stop automatically the searching for candidate

frequency or hard handoff to candidate frequency based on the power

difference between candidate frequency and serving frequency, this

parameter must be set to 0. Otherwise, if MS is required to stop automatically

the searching when power difference between candidate frequency and

serving frequency is less than minimum_power_diff (Unit: dB), the parameter

must be set to .



MINPLTECIO (Min Pilot EC/IO of Candidate Frequency) [Description] This parameter represents the minimum pilot strength threshold that MS

attempts to demodulate forward traffic channel on the candidate frequency.

After receiving the HDM, MS attempts to forward traffic channel of target pilot.

If total pilot strength of active set in the candidate frequency is less than the

parameter, MS regards it as search or handoff failure and stops demodulating

the traffic channel. If the parameter is set to 0, it indicates that this parameter

is not used. Whatever the Eclo of target active set in the candidate frequency

is, perform the search or hard handoff.

[Type] Um interface parameter (CFSRQM)

[Range and unit] -31- 0 (unit: 0.5dB)

[Operating range] -31--0


[Setting tradeoff] If MS is not required to stop automatically demodulating target traffic channel

based on Eclo strength of target active set in candidate frequency, the

parameter must be set to 0. Otherwise, the parameter must be set to another

value. If the parameter is set to -20, it indicates that MS stops demodulating

forward traffic channel of target active set when comprehensive pilot strength

of target active set in candidate frequency is less than -10dB.

CFTADD (Candidate Frequency T_ADD) [Description] MS uses the parameter to determine whether to report pilot PN of a candidate

frequency when BSC reports the CFSRPM. For example, if the parameter is

set to -12dB, MS reports the pilot that pilot strength is more than -12dB to the

BSC during the CFSRPM.




[Range and unit] -63—0 (unit: 0.5dB)

[Operating range] -16-- -32


[Setting tradeoff] The smaller the value of the parameter (such as less than -32), the lower the

actual report threshold, and MS is easy to report candidate frequency pilot. In

this way, the report on candidate frequency search report is more frequent,

and many search report messages may be invalid to increase signaling load.

The larger the value of the parameter (such as larger than -16), the higher the

actual report threshold, and MS is difficult to report candidate frequency pilot.

In this way, less signaling is reported. Because the report conditions are very

rigorous, the opportunity for the handoff may be missed.

TFWAITTM (Wait Period on Candidate Frequency) [Description] MS starts a handoff timer during the hard handoff. Target pilot N11m (one)

good frames must be received before timer times out. Otherwise, the handoff

fails. This parameter is used to set the timer length, with the unit of 80ms.


[Range and unit] 0—15 (unit: 80ms)



[Setting tradeoff]



The larger the parameter, the longer the MS waits on the target channel if MS

does not capture target channel during the hard handoff. If the parameter is

set to 15, the longest wait time for MS is 1.2 seconds. If MS hard handoff

failure is not allowed to return to original channel, the parameter must be set

to a maximum value to ensure that MS tries to capture target channel.

The smaller the parameter, the shorter the MS waits on target channel if MS

does not capture target channel during the hard handoff.

CFPLTINC (Pilot Pseudo Noise Code Increase Step during Candidate Frequency Search)

[Description] This parameter represents pilot PNINC on the candidate frequency. After MS

performs hard handoff to candidate frequency, use the parameter as

CFPLTINC of target frequency and to search remaining set.


[Range and unit] 0—15 (unit: 64chips)



[Setting tradeoff] This parameter should be configured according to PN planning on the

candidate frequency.

CFSRCHWINN (Neighbor Set Search Window of Candidate Frequency) [Description] This parameter represents default search window of candidate frequency

search set. In the candidate frequency search request message, specify

different search windows respectively for neighbor pilot of each candidate

frequency. If other search windows are not specified for the pilot of a



candidate frequency, MS uses the default parameter to search neighbor set

pilot of candidate frequency.


[Range and unit] 0--15


[Recommended value] 8 (60chips)

[Setting tradeoff] If the parameter is set larger, the signal of candidate frequency neighbor pilot

is more possible to be located in the search window. Therefore, the neighbor

pilot of candidate frequency is searched easy with longer time. In addition,

some irrelevant signals may be searched too. If the parameter is set smaller,

it is difficult to search the signal of candidate frequency neighbor pilot because

of longer delay between candidate frequency and serving frequency.

CFSRCHWINR (Remaining Set Search Window of Candidate Frequency) [Description] This parameter represents remaining set search window on the candidate

frequency. After performing hard handoff to candidate frequency successfully,

MS uses the parameter as CFSRCHWINR to search the remaining set.


[Range and unit] 0--15(Unit: refer to the table in the CFSRCHWINA)


[Recommended value] 9(80chips)

[Setting tradeoff] Refer to CFSRCHWINR.



SRCHPRD (Periodic Search Period) [Description] When MS is instructed to perform periodical search for candidate frequency,

MS starts one periodical candidate frequency search timer, this parameter is

used to set the duration of timer.


[Range and unit] 0--15, table 4-3 shows the relation between parameter value and actual

period.

Table 4-3 The relation between parameter value and period


[Recommended value] 2 (2 seconds)

[Setting tradeoff] The larger the parameter, the longer report period of candidate frequency

search report, and BSC is difficult to obtain pilot strength information in time to

candidate frequency so that hard handoff cannot be triggered in time.

The smaller the parameter, the more frequent the candidate frequency search

report, so that hard handoff is easy to be triggered, resulting in much signaling

load. In addition, continuous different-frequency search also affects

conversation quality.



4.6 Mobile Assisted Hard Handoff Parameter (HHOMAHHOPARA) [Command Name] MOD HHOMA (Base Station Controller Management \ Configuration

Management \ Algorithm Configuration \ Modify Mobile Assisted HHO

Parameters).

TADDMAHHO (Mobile Assisted HHO Serving Carrier Threshold) [Description] When the strength of soft handoff target active set is less than the parameter,

and the strength of MAHHO target active set is higher than

TMAHHOABSOLUTETHRS, trigger the MAHHO.


[Range and unit] -63--0(unit: 0.5dB)



[Setting tradeoff] The smaller the parameter (such as less than -32), the worse the signal

strength of source side cell to trigger later hard handoff when MS performs

hard handoff from source cell to target cell. Consequently, MS is difficult to

receive HDM delivered from source side BTS to result in hard handoff failure.

If the parameter is set too larger (such as more than -14), the conditions is

satisfied easily during the hard handoff. At that time, hard handoff depends on

hard handoff absolute threshold.

MAHHOTHRS (Mobile Assisted HHO Target Carrier Threshold) [Description]



When the strength of soft handoff target active set is less than TADDMAHHO,

and the strength of MAHHO target active set is higher than this parameter,

trigger the MAHHO.

[Type] Internal algorithm parameter




[Setting tradeoff] The smaller the parameter (such as less than -28), the worse the signal

strength of target cell required by MS assist hard handoff. The condition is

satisfied easily, so trigger MS assist hard handoff easily. But the signal of

target cell is not good, MS is difficult to capture target cell to result in hard

handoff failure.

The larger the parameter (such as more than -10), the better the signal

strength required by MS assist hard handoff. In this case, MS captures the

channel of target cell easily when MS assists hard handoff, but MS assist hard

handoff may be difficult to be triggered.

RELTHRS (Mobile Assisted HHO Relative Threshold) [Description] When the strength of MAHHO active set is the parameter value higher than

the strength of soft hardoff target active set, trigger MAHHO.

[Type] Internal algorithgm parameter

[Range and unit] 0--63(unit: 0.5dB, that is, 0--31.5dB)




[Recommended value]

8

[Setting tradeoff] The larger the parameter value, the signal of target cell is better than that of

source cell during the hard handoff, and the MS captures forward channel of

target cell more easily. But the signal of source cell during the hard handoff is

bad, MS cannot receive HDM delivered from source cell.

The smaller the parameter value, the hard hadnoff is triggered more easier.

Therefore, the soruce side forward channel is not be very bad, MS receives

HDM from source cell easier, but MS cannot make sure to capature forward

channel of target cell.

STRTSRCHTHRS (Mobile Assisted HHO Start-Search Threshold) [Description] When MS assists hard handoff, BSC must deliver candidate frequency search

request message to MS so that start candidate frequency search of MS. This

parameter is used to determine the time that delivering candidate frequency

search request message to MS. When the pilot strength of active set is less

than the parameter, BSC delivers search request to start the search.





[Setting tradeoff] The smaller the parameter (such as less than -28), the lower the

corresponding actual physical threshold, and the later hard handoff search is

started. At that time, the link quality of original channel may be bad, but MS

cannot receive candidate frequency search request message. Consequently,



the search cannot be started normally to miss the opportunity in which the

hard handoff is triggered.

The larger the parameter (such as more that -16), the earlier that

different-frequency search is started when serving frequency strength is very

good. The different-frequency search may disconnect the conversation, so

unnecessary effect on link quality of serving frequency may not be caused.

STOPSRCHTHRS (Mobile Assisted HHO Stop-Search Threshold) [Description]

When MS assist hard handoff, BSC must deliver candidate frequency

search request message to MS to start candidate frequency search of MS.

But different-frequency search may affect conversation quality, BSC must

deliver CFSCNM to MS when the pilot strength of active set is better to stop

different-frequency search.

The parameter is used to determine the time that delivering CFSCNM to

MS to stop the search. When pilot strength of active set is higher than the

parameter, BSC delivers search control message to stop the search.






corresponding actual physical threshold, and the hard handoff search stops

easily. Consequently, the MS decreases the different-frequency search but

different-frequency may be late.

The larger the parameter (such as more than -12), the higher the

corresponding actual physical threshold, and the hard handoff search stops

more difficult. In this case, frequent different-frequency search may affect



conversation quality, but MS is easy to measure the strength of candidate

frequency in real-time.

4.7 Handdown hard handoff Parameter (HHOHANDDOWNPARA) [Command Name] MOD HNDDWN (Base Station Controller Management \ Configuration

Management \ Algorithm Configuration \ Modify Handdown HHO Parameters).

ABSTHRS (Handdown HHO EC/IO Intensity Absolute Threshold) [Description] When pilot strength of soft handoff target active set is less than the parameter,

and the minimum RTD of current active set pilot is more than

HANDDOWNRTD, trigger handdown hard handoff.






corresponding actual physical threshold, the later handdown hard handoff is

triggered.

For dual-carrier network, the coverage area of upper cell is larger to involve

much traffic. If the trigger is too late, the fade of source channel link is serious

and HDM cannot be received from original channel to result in handoff failure.

In addition, too late handoff cannot ensure the signal quality of lower target

cell in the handdown hard handoff and results in difficult access in the target

cell. The multiple target hard handoffs can solve the problem to a great extent.




corresponding actual physical threshold, and the earlier handdown hard

handoff is triggered. In this case, the signal quality of lower target cell in the

handdown hard handoff is good and MS is easy to access target cell. For the

dual-carrier network, the coverage area of upper cell is less, so the upper cell

cannot involve traffic.

MAXRTD (Handdown HHO Max Loop Delay Threshold) [Description] When the pilot strength of soft handoff target active set is less than ABSTHRS,

and minimum RTD of current active set pilot is larger than the parameter,

trigger handdown hard handoff. RTD stands for loop delay, reflecting the

distance from BTS to MS. RTD is inaccurate because of multipath effect and

effect of soft handoff. Each chip is of about 244 meters.


[Range and unit] 0--65535(unit: chip)



[Setting tradeoff] The larger the parameter, the farther from hard handoff band to source cell,

and the later hard handoff is triggered. In this case, upper cell of dual-carrier

network can involve more traffic, but the signal quality of target cell cannot be

ensured.

The smaller the parameter, the closer form hard handoff band to source cell,

and the earlier hard handoff is triggered. In this case, the signal quality of

target cell is very good and the access with MS is easy based on radio signal.

But upper cell may not involve traffic to result in overload of lower cell.



4.8 Direct Hard Handoff Parameter (HHODIRECTPARA) [Command Name] MOD DRCT (Base Station Controller Management \ Configuration

Management \ Algorithm Configuration \ Modify Direct HHO Parameters).

ABSTHRS (Direct HHO EC/IO Strength Absolute Threshold) [Description] When pilot strength of soft handoff target active set is less than the parameter,

and the minimum RTD of current active set pilot is more than DRTRTD,

trigger direct hard handoff.






corresponding actual physical threshold, and the later the direct hard handoff

is triggered. Because the fade of source channel link is serious, HDM cannot

be received from original channel to result in handoff failure.


corresponding actual physical threshold, and the earlier the direct hard

handoff is triggered. In this case, MS receives HDM form source side, but the

coverage area of original cell is smaller.

MAXRTD (Direct HHO Max. Loop Delay Threshold) [Description] When the pilot strength of soft handoff target active set is less than

DRTABSTHRS, and the minimum RTD of current active set pilot is more than



the parameter, trigger the direct hard handoff. For the definition of RTD, refer

to the [Description] in the HANDDOWNRTD.


[Range and unit] 0--65535(unit: chip)



[Setting tradeoff] The larger the parameter, the farther the distance from hard handoff band to

source cell, and the later the hard handoff is triggered.

The smaller the parameter, the closer the distance from hard handoff band to

source cell, and the earlier the hard handoff is triggered.

4.9 Pilot Beacon Hard Handoff Parameters (HHOPILOTBEACONPARA)

[Command Name] MOD HHOBPLT (Base Station Controller Management \ Configuration

Management \ Algorithm Configuration \ Modify Pilot Beacon HHO

Parameters).

TADDHHOBPLT (Pilot Beacon HHO Serving Carrier Threshold) [Description] When the signal strength of soft handoff target active set is less than the

parameter, and the strength of pilot beacon hard handoff target cell is higher

than PLTBEANABSTHRS, trigger pilot beacon hard handoff.







[Setting tradeoff]] The smaller the parameter (such as less than -32), the worse the signal

strength of source cell to trigger later hard handoff when MS performs hard

handoff from source cell to target cell. Consequently, MS is difficult to receive

HDM delivered from source side BTS to result in hard handoff failure.

If the parameter is set too larger (such as more than -14), the conditions is

satisfied easily when the hard handoff is triggered. At that time, hard handoff

depends on hard handoff absolute threshold.

THHOBPLTABSTHRS (Pilot Beacon HHO Target Carrier Threshold) [Description] When the strength of soft handoff target active set is less than PLTBEAN, and

the strength of pilot beacon hard handoff target active set is higher than the

parameter, trigger pilot beacon hard handoff.





[Setting tradeoff] The smaller the parameter (such as less than -28), the lower the signal

strength of target cell required by pilot beacon hard handoff. The condition is

satisfied easily, so trigger pilot beacon hard handoff easily. But the signal of

target cell is not good, MS is difficult to capture target cell to result in hard

handoff failure.



The larger the parameter (such as more than -10), the better the signal

strength required by pilot beacon hard handoff. In this case, MS captures the

channel of target cell easily when pilot beacon handoff occurs, but pilot

beacon hard handoff may be difficult to be triggered.

THHOBPLTRELTHRS (Pilot Beacon HHO Relative Threshold) [Description] When the strength difference between strength of pilot beacon hard handoff

target active set and strength of soft handoff target active set is more than the

parameter, trigger pilot beacon hard handoff..


[Range and unit] 0--63(unit: 0.5dB, that is, 0--31.5dB)



[Setting tradeoff]

The larger the value of this parameter is, the stronger the signals in the target

cell are than those in the source cell when a hard handoff is to take place. In

this case, it is easier for the MS to capture the forward channel in the target cell.

However, since the signal strength in the source cell is low now, it is very likely

that the MS cannot receive the HDM from the source cell. The smaller the

value of this parameter is, the more easily the hard handoff will be triggered. In

this way, the quality of the forward channel in the source cell will not become so

poor that the MS could receive the HDM from the source cell. But it is not

ensured that the MS can capture the forward channel in the target cell.

4.10 Pilot Measurement Request Parameters (PMROPARA) [Command Name]



MOD PMRO (Base Station controller Management \ Configuration

Management \ Algorithm Configuration \ Modify Pilot Measurement Request

Parameters).

MINPWRTHRS (Pilot Min Rx Power Threshold) [Description] This parameter represents total receiving power threshold of active set pilot.

When periodical pilot measurement request direction is delivered to MS, and

ORDQ field is not “11111111”, MS starts periodical pilot measurement of

serving frequency. MS determines whether to report PPSMM to BSC

periodically based on the parameter and minimum receiving Ec/lo threshold

MINECIOTHRS.

[Type] Um interface parameter (PPMRO)

[Range and unit] 0--31(unit: the conversion relation exists with actual power. Refer to [Setting

tradeoff])



[Setting tradeoff] If MS is not required to determine whether to report PPSMM based on total

receiving power of active set pilot, this parameter must be set to “11111”

(that is 31). Otherwise, if you want to MS to report PPSMM when total

receiving power of active set pilot is less than pilot_ec_thresh and do not

report PPSMM when total receiving power of active set pilot is higher than

pilot_ec_thresh, the parameter must be set to

.

MINECIOTHRS (Pilot Min Rx EC/IO Threshold) [Description]



This parameter represents total Ec/lo threshold of active set pilot. When

periodical pilot measurement request direction is delivered to MS, and ORDQ

field is not “11111111”, MS starts periodical pilot measurement of serving

frequency. MS determines whether to report PPSMM to BSC periodically

based on the parameter and minimum receiving power threshold

MINPWRTHRS.



[Operating range] -14-- -28, that is, -31


[Setting tradeoff] If MS is not required to determine whether to report PPSMM based on total

Ec/lo of active set pilot, this parameter must be set to - 31. Otherwise, if you

want to MS to report PPSMM when total Ec/lo of active set pilot is less than

pilot_streng_thresh and do not report PPSMM when total Ec/lo of active set

pilot is higher than pilot_streng_thresh, the parameter must be set

to .

INCLSETPT (Eb/Nt Setpoint Included in PPSMM) [Description] This parameter represents that whether Eb/Nt setting point information

identification bit is included in the PPSMM.




[Recommended value]



0

[Setting tradeoff] If MS must contain outloop Eb/Nt setting pint information in the PPSMM, the

filed bit is set to 1. Otherwise, it is set to 0. The default value is 0.

ORDQ (PPMRO Report Period) [Description] The parameter represents the period that MS reports PPSMM, with the unit of

80 milliseconds.


[Range and unit] 1—255 (the range is related to INCLSETPT. Refer to [Setting tradeoff])

[Operating range] 1--255 (the range is related to INCLSETPT. Refer to [Setting tradeoff])

[Recommended value] 25(2 seconds)

[Setting tradeoff] If INCLSETPT is set to 0, the field ranges from 10 to 126. If INCLSETPT is

set to 1, the field ranges from 1 to 254.

The smaller the parameter, the more frequent the PPSMM is reported. In this

case, BSC can trace the change of active set pilot strength of MS, resulting

in large load.

The larger the parameter, the longer period the PPSMM is reported. In this

case, the signaling load is less but BSC cannot trace the change of active

set pilot strength of MS in time.

5. Channel Assignment

5.1 Channel Information (CH_INFO)



[Command name]

MOD CHINF(Base Station Controller Management\Configuration

Management\Algorighm Configration\Modify Channel Information Parameters)

CARRASSGNVAL (Carrier Assign Threshold)

[Description]

Load threshold used by carrier assign calculation.

[Type]

Algorithm parameter

[Range and unit]

0~ 100 (unit: %).

[Operating range]

0~ 100

[Recommended value]

80

[Setting tradeoff]

None

FBASICVLV (Forward Basic Admission Threshold) [Description] This parameter represents admission control threshold allocated by voice and

data service forward FCH. When forward load is less than this threshold, allow

for the call, soft handoff and hard handoff access. If forward load of a specified

carrier exceeds this threshold, new calls will be prohibited from accessing.


[Range and unit] 0--100, Unit: %




[Recommended value] 100. This parameter should not be modified.

[Setting tradeoff] If this parameter is set large, the system accesses more calls but system may

breaks down easily.

FSOFTVLV (SHO Forward Admission Threshold) [Description] This parameter represents forward admission threshold during the

establishment of soft handoff branch. If forward load of a specified carrier

exceeds this threshold, new soft handoff branches cannot be established on

the carrier. Generally, the threshold is more than forward basic admission

threshold.


[Range and unit] 0--100, unit: %


[Recommended value] 100. If this parameter is set to 100%, that is, forward admission control

function invalids.


REVMAXUSER (Max Number of Equivalent Reverse Channels)

[Description]

This parameter represents the maximum number of equivalent reverse

channels threshold.



[Type]

Internal algorithm parameter

[Range and unit]

0~255

[Operating range]

0~ 75

[Recommended value]

75

[Setting tradeoff]

If this parameter is set small, the system can keep steady and no reverse crash

will occur, but the system capacity will decrease. If the parameter is set large,

the system capacity will increase while the system will become unsteady.

E1XDATEQU (Data Service FCH (1XSCH) Equivalent Channels)

[Description]

The reverse 1X data call in the specified carrier (SCH or FCH) is equivalent to

the channel number of RC3 voice call.

[Type]


[Range and unit]

0~ 255 (unit: 0.1)

[Operating range]

0~255

[Recommended value]

25



[Setting tradeoff]

If the parameter is set large, the number of reverse data service users of the

system will decrease and the system can keep steady. Otherwise, the number

of reverse data service users of the system will increase, but the system will

become unsteady.

E2XDATEQU (Data Service 2XSCH Equivalent Channels)

[Description]

The reverse 2X data call in the specified carrier is equivalent to the channel

number of RC3 voice call.

[Type]


[Range and unit]

0~255 (unit: 0.1)

[Operating range]

0~255

[Recommended value]

40

[Setting tradeoff]

Refer to E1XDATEQU (Data Service FCH(1XSCH) Equivalent Channels)


[Description]





[Type]


[Range and unit]

0~255 (unit: 0.1)

[Operating range]

0~255

[Recommended value]

75

[Setting tradeoff]

Refer to E1XDATEQU (Data Service FCH(1XSCH) Equivalent Channels).


[Description]



[Type]


[Range and unit]

0~255 (unit: 0.1)

[Operating range]

0~255

[Recommended value]

130

[Setting tradeoff]



Refer to E1XDATEQU (Data Service FCH(1XSCH) Equivalent Channels).


[Description]



[Type]


[Range and unit]

0~ 255 (unit: 0.1)

[Operating range]

0~255

[Recommended value]

220

[Setting tradeoff]

Refer to E1XDATEQU (Data Service FCH (1XSCH) Equivalent Channels).

E32XDATEQU (Data Service 32XSCH Equivalent Channels) [Description] The reverse 32X data call in the specified carrier is equivalent to the channel



[Range and unit] 0--65535, Unit: 0.1





[Setting tradeoff] For details, see “E1XDATEQU (Data Service FCH (1XSCH) Equivalent Channels)”.

RC1EQU (RC1 Equivalent Voice Channels)

[Description]

RC1 equivalent voice channels are equivalent to RC3 voice call of voice

service on a specified carrier

[Type]


[Range and unit]

0~ 100 (unit: 0.1)

[Operating range]

0~100

[Recommended value]

17

[Setting tradeoff]

None


[Description]


service on a specified carrier.

[Type]




[Range and unit]

0~ 100 (unit: 0.1)

[Operating range]

0~100

[Recommended value]

21

[Setting tradeoff]

None


[Description]


service on a specified carrier.

[Type]


[Range and unit]

0~ 100 (unit: 0.1)

[Operating range]

0~100

[Recommended value]

21

[Setting tradeoff]

None



FEPACAVAL (EPACA Resource Available Threshold)

[Description]

This parameter is used for the Enhanced Priority Access and Channel

Assignment (EPACA) function. EPACA forward load threshold.

[Type]


[Range and unit]

0~ 100 (unit: %)

[Operating range]

0~ 100

[Recommended value]

90

[Setting tradeoff]

Since the load fluctuates, the MSC may not clear the call if this parameter is set

too large. As a result, the access of the resource assigned to the privileged

user may fail. If the parameter is set too small, the MSC may clear the call.

MSPREVASSGNTP (MS Version Priority Type)

[Description]

After the specified carrier assigned according to the MS version at priority,

select the MS version type assigned by the carrier at priority.

[Type]


[Range and unit]



0~ 2. 0: Priority of IS2000 MS, 1: Priority of IS95 MS, 2: No priority

[Operating range]

0~ 2

[Recommended value]

2

[Setting tradeoff]

None

SERVASSGNTP (Service Priority Type)

[Description]

After the specified carrier assigned according to the service type at priority,

select the service type assigned by the carrier at priority.

[Type]


[Range and unit]

0~ 2. 0: Voice service priority, 1: data service priority, 2: No priority

[Operating range]

0~ 2

[Recommended value]

2

[Setting tradeoff]

None

5.2 SCH Assign Parameters (SCH_PARA) [Command name]



MOD SCH (Base Station Controller Management\Configuration

Management\Algorithm Configuration------Modify SCH Allocation Parameter)

TFAC (Physical Channel Transmission Efficiency Factor)

[Description]

This parameter is used for the assignment of forward SCH DURATION. This

parameter can offset the effect of the protocol layer overhead on the calculation

of duration. It indicates the efficiency of the valid data transmission on the

forward channel. When the forward SCH is assigned dynamically, this

parameter is used to adjust the assigned duration. The smaller this parameter

is, the longer the assigned duration is. If it is set to 0, the system will forcedly

change it to the default 80.

[Type]


[Range and unit]

0~ 100 (unit: %).

[Operating range]

0~ 100

[Recommended value]

80

[Setting tradeoff]

In practice, it is usually unnecessary to change the recommended value.

NBRINTFFAC (Neighbor Cell Interference Factor) [Description] This parameter is used for reverse admission control. It indicates the capacity

effect on the current cell owing to the interference from its neighbor cell. The



greater this parameter is, the harder the call access to this cell will be. It is

recommended to set it to 0.


[Range and unit] 0--100, Unit: %


[Recommended value]

0.

[Setting tradeoff] This value is used seldom, so this parameter is set to 0 temporarily.

SIGDL (SCH Signalling Delay)

[Description]

The system signalling delay during the SCH assignment. If this parameter is

too small, the asynchronization of SCH transmission might occur along with the

bad transmission quality.

[Type]

Algorithm parameter

[Range and unit]

0~ 31 (unit: 20ms).

[Operating range]

0~ 31

[Recommended value]

10

[Setting tradeoff]



If the value of the parameter is set too small, the data transmission may fail. If

the value of the parameter is set too large, the data transmission may lag

behind.

TDL (SCH Transmission Delay)

[Description]

The parameter is not used at present. The signalling delay from the moment

the system sends the SCH establishment request to the moment transmission

starts on the SCH. When the forward SCH duration is assigned dynamically,

this parameter is used to adjust the assigned duration. The greater this

parameter is, the longer the assigned SCH duration is.

[Type]


[Range and unit]

0~255 (unit: 20ms frame)

[Operating range]

0~ 100

[Recommended value]

64

[Setting tradeoff]

The larger the value of this parameter is, the longer the duration is. In this way,

the SCH assignment duration will last longer.

FWDCENPLTTHRS (Forward Central Pilot Threshold) [Description] The pilot strength of the assigned forward SCH over 8X cannot be lower than

this central pilot strength threshold.




[Range and unit] -63--0. Unit: 0.5dB.

[Operating range]

-63--0

[Recommended value] -13, namely, -6.5dB.

[Setting tradeoff] Under special conditions, if SCH to be allocated is not restricted by pilot

strength, this value is modified as -31, that is, -15.5dB.

FWDTRANPLTTHRS (Forward Transition Pilot Threshold) [Description] The pilot strength of the assigned forward SCH over 4X cannot be lower than

this transition pilot strength threshold.




[Recommended value] -18, that is, -9dB.


strength, this parameter is modified as -31, that is -15.5dB. Note that

“Forward Central Pilot Threshold” is higher than “Forward Transition Pilot Threshold”.

FWDBDR4XPLTTHRS (Forward Border 4x Pilot Threshold) [Description]



The pilot strength of the assigned forward SCH over 2X cannot be lower than

this forward border 4X pilot strength threshold.




[Recommended value] -22. Namely, -11dB.

[Setting tradeoff]

Under special conditions, if SCH to be allocated is not restricted by pilot

strength, this parameter is modified as -31, that is -15.5dB. Note that “Forward Transition Pilot Threshold” must be higher than “Forward Border 4x Pilot Threshold”.

FWDBDR2XPLTTHRS (Forward Border 2x Pilot Threshold)

[Description]

The pilot strength of the assigned forward SCH over 1X cannot be lower than

this forward border 2X pilot strength threshold.

[Type]

Algorithm parameter

[Range and unit]

-63--0. Unit: 0.5dB.

[Operating range]

-63--0

[Recommended value]

-26, namely, -13dB



[Setting tradeoff]

Under special conditions, if SCH to be allocated is not restricted by pilot

strength, this parameter is modified as -31, namely, -15.5dB. Note that

“Forward Border 4x Pilot Threshold” must be higher than “Forward Border 2x Pilot Threshold”.

FWDBDR1XPLTTHRS (Forward Border 1x Pilot Threshold) [Description] The pilot strength of the assigned forward SCH over or up to 1X cannot be

lower than this forward border 1X pilot strength threshold.




[Recommended value] -28, namely, -14dB.


strength, this parameter is modified as -31, namely, -15.5dB. Note that

“Forward Border 2x Pilot Threshold” must be higher than “Forward Border 1x Pilot Threshold”.

REVBDRCENPLTTHRS (Reverse Central Pilot Threshold) REVBDRTRANPLTTHRS (Reverse Transition Pilot Threshold) REVBDR4XPLTTHRS (Reverse Border 4x Pilot Threshold) REVBDR2XPLTTHRS (Reverse Border 2x Pilot Threshold) REVBDR1XPLTTHRS (Reverse Border 1x Pilot Threshold) [Description] See corresponding forward pilot strength threshold. The difference lies in

those ones are designated for forward SCH and these ones for reverse SCH.






[Recommended value] The recommended value is consistent with corresponding forward parameter.

[Setting tradeoff]

R1XDRT (Reverse 1XSCH Duration)

[Description] This parameter represents the assigned duration corresponding to the

assigned reverse 1X SCH. The duration varies with corresponding reverse

SCH of different rate.


[Range and unit] 0~15. For details, see table 5-1.


[Recommended value] 14(5.12s)

[Setting tradeoff] 14” is the maximum value representing the finite assignment duration. A large

value of this parameter can improve the reverse data transmission rate. If the

SCH rate is low, the parameter should be more than “13”.

Table 5-1 Representation of SCHDRT

F-SCHDRT

R-SCHDRT

(binary)

Duration in 20 ms

0001 1



0010 2

0011 3

0100 4

0101 5

0110 6

0111 7

1000 8

1001 16

1010 32

1011 64

1100 96

1101 128

1110 256

1111 Indefinite

R2XDRT (Reverse 2XSCH Duration) [Description] This parameter represents the assigned duration corresponding to the

assigned reverse 2X SCH.. For details, see R1XDRT.





[Setting tradeoff]

“14” is the maximum value representing the finite assignment duration. A large


SCH rate is low, the parameter must be more than 13.




assigned reverse 4X SCH. For details, see R1XDRT.







SCH rate is low, the parameter must be more than 13.






[Recommended value] 13.


value of this parameter can improve the reverse data transmission rate.






[Range and unit] 0~15,For details, see table 5-1.








[Range and unit] 0~15,For details, see table 5-1.



[Setting tradeoff] 14” is the maximum value representing the finite assignment duration. A

large value of this parameter can improve the reverse data transmission rate.



FWDMINDRT (Min Duration of Forward SCH) [Description] This parameter represents the minimum assigned duration of the forward

SCH.

[Type]


[Range and unit]

1~255 (unit: 20ms )



[Setting tradeoff]

This parameter should be set with reference to the delay overhead for one SCH

assignment and should be no less than 8.

FWDMAXDRT (Max Duration of Forward SCH)

[Description]

This parameter represents the maximum assigned duration of the forward

SCH.

[Type]


[Range and unit]

1~255 (unit: 20ms)


[Recommended value]



64

[Setting tradeoff]

A large value of this parameter can improve the SCH transmission efficiency

when the MS is under a good radio environment, but it is unfavourable for the

transmission when the MS moves.

FWD32XMINDRT (Min Duration of Forward 32X SCH) [Description] This parameter represents the minimum assigned duration of the forward

32X SCH.


[Range and unit] 0~15,For details, see table 5-1..





FWD32XMAXDRT (Max Duration of Forward 32X SCH) [Description] This parameter represents the maximum assigned duration of the forward

32X SCH.


[Range and unit] 0~15,For details, see table 5-1..

[Operating range]



1~15

[Recommended value] 15, that is, indefinite duration

[Setting tradeoff] Whether the forward and reverse rate can be up to 32x, they are controlled by

respective switch. In addition, whether to support 32x for MS

FWDBDR1XVLV (Border Area 1X SCH Forward Admission Threshold)



[Description]

These parameters represent the allowable maximum forward load of 1X, 2X

and 4X SCHs assigned in the border area, respectively. The forward load of

the assigned border area forward 1X SCH cannot be higher than or equal to

this admission threshold.

[Type]


[Range and unit]

0~100 (unit: %)

[Operating range]

0~100

[Recommended value]

1X, 2X and 4X correspond to 68, 63 and 54 respectively.




FWDMID1XVLV (Transitional Area 1X SCH Forward Admission Threshold)



FWDMID8XVLV (Transitional Area 8X SCH Forward admission Threshold)

[Description]

These parameters represent the allowable maximum forward load of 1X, 2X,

4X and 8X SCHs assigned in the intermediate area, respectively.


[Range and unit] 0~100, Unit: %


[Recommended value] 1X, 2X, 4X and 8X correspond to 72, 68, 63 and 54.


FWDCEN1XVLV (Central Area 1X SCH Forward Admission Threshold) FWDCEN2XVLV (Central Area 2X SCH Forward Admission Threshold) FWDCEN4XVLV (Central Area 4X SCH Forward Admission Threshold) FWDCEN8XVLV (Central Area 8X SCH Forward Admission Threshold) FWDCEN16XVLV (Central Area 16X SCH Forward Admission Threshold) FWDCEN32XVLV (Central Area 32X SCH Forward Admission Threshold) [Description] These parameters represent the allowable maximum forward load of 1X, 2X,

4X, 8X and 16X SCHs assigned in the central area, respectively.


[Range and unit] 0~100, Unit: %




[Recommended value] 1X, 2X, 4X, 8X, 16X and 32X correspond to 74, 73, 71, 68, 62 and 60.


SCHINIPWRHOOFFSET (Handoff Offset) [Description] Initial transmit power of SCH is estimated based on that of FCH and

consideration of channel rate, target FER, channel code mode and handoff

state.

When the effect of handoff state is considered, perform power correction to

handoff factor. The soft handoff power offset required by SCH varies with

different RCs and code modes. This parameter is used to specify handoff

offset and make up the deviation caused by estimation.


[Range and unit] -128--127.




SCHINITPWRADJUST (SCH Initial Adjust) [Description] Initial transmit power of SCH is estimated based on that of FCH and

consideration of channel rate, target FER, channel code mode and handoff

state. This parameter is used to make up the deviation caused by the above



estimation.


[Range and unit] -128--127.




5.3 CHM Module Parameters (MCHM) [Command name] MOD MCHM (Base Station Controller Management\Configuration

Management\Algorithm Configuration----Modify MCHM)

ACMACRODIVSW (Access Macro Diversity Switch) [Description] This parameter represents the setting of a switch, indicating whether the

access macro diversity function is enabled or not..

[Type]

Algorithm parameter

[Range and unit]

0~1. 0: Off, 1: ON

[Operating range]

0~1

[Recommended value]

1



[Setting tradeoff]

It is recommended to enable the access macro diversity switch so as to

improve the access success ratio.

MBRANUMA (Max. Number of Access Macro Diversity Branches)

[Description]

This parameter indicates the allowable maximum branches of the access

macro diversity.

[Type]

Algorithm parameter

[Range and unit]

1~6 (unit: branch)

[Operating range]

1~6

[Recommended value]

3

[Setting tradeoff]

If the value of this parameter is set too large, the access success ratio will be

improved little, but resources will be wasted.

MBRANUMINTERHHO (Max Number of Inter-BSC Hard Handoff Branches)

[Description]

This parameter represents the maximum number of branches that can be

assigned when the inter-BSC hard handoff is processed at the target side.



[Type]

Algorithm parameter

[Range and unit]

1~6 (unit: branch)

[Operating range]

1~6

[Recommended value]

6

[Setting tradeoff]

Since the target active set is aimlessly selected to some extent when a hard

handoff is performed, the value of this parameter can be set large so as to

improve the hard handoff success ratio.

DSERVALWHFTYPE (Data Call Supported Handoff Types)

[Description]

This parameter represents the handoff type of the data call, indicating whether

the data service is allowed to perform a soft handoff or hard handoff. Note that

this parameter only applies to the FCH, indicating whether allow the FCH of

data service to perform a soft handoff or hard handoff. It is different from the

soft handoff of SCH.

[Type]

Algorithm parameter

[Range and unit]

0~3. 0: soft handoff and hard handoff are allowed, 1: only soft handoff is

allowed 2: only hard handoff is allowed, 3: no handoff is allowed.

[Operating range]



0~3

[Recommended value]

0

[Setting tradeoff]

None

DSERVPWRRPTFRM (Frames of Data Service Measurement Report)

[Description]

For the data service, the MS should periodically report PMRMs so that the

real-time change of pilot strength can be monitored. This parameter indicates

that the MS will report PMRM when the accumulated frames exceed

2^( DSERVPWRRPTFRM /2)* 5.

[Type]

Um interface parameter (SPM/MCRRPM/PCNPM).

[Range and unit]0~15.

[Operating range]0~3

[Recommended value] 2, namely, when the accumulated total frames reach

10, the MS will report a PMRM. This value remains unchangeable.

[Setting tradeoff]

If the value of the parameter is set too small, the MS will frequently report

PMRMs. As a result, the reverse link quality is affected and the CPU load of

SPU increases. However, if the value of the parameter is set too large, it will be

difficult to monitor the real-time change of pilot strength.

.

DSERVPWRRPTDEY (Data Service Measurement Report Delay)

[Description]



For the data service, the MS should periodically report PMRMs so that the

real-time change of pilot strength can be monitored. This parameter indicates

that the counter will be reset at a delay of DSERVPWRRPTDEY * 4 frames

after the MS reports a PMRM. That is, the PMRM report period is

[2^( DSERVPWRRPTDEY /2)* 5 + DSERVPWRRPTDEY * 4] frames.

[Type]

Um interface parameter (SPM/MCRRPM/PCNPM).

[Range and unit]

0~31 (unit: 4 frames)

[Operating range]

0~31

[Recommended value]

5, namely, 20 frames

[Setting tradeoff]

None

SPT16XREVSCHSW (16X R-SCH Support Switch)

[Description]

This parameter indicates the allowable maximum rate of the reverse SCH is

16X or 8X.When the switch is set ON, the allowable maximum rate is 16X.

[Type]

Algorithm parameter

[Range and unit]

0~ 1. 0: Maximum rate is 8X, 1: Maximum rate is 16X

[Operating range]

0~ 1



[Recommended value]

1

[Setting tradeoff]

None

SCHRELBYFERSW (FER Based SCH Release Switch)

[Description]

When the switch is set ON, it indicates that one SCH can be initiatively

released according to the FER of the SCH.

[Type]

Algorithm parameter

[Range and unit]

0~3. 0 – Off, 1 – forward ON, 2 – reverse ON, 3 – both reverse and forward ON

[Operating range]

0~ 3

[Recommended value]

0

[Setting tradeoff]

None

SCHRELBYPILSTSW (Pilot Strength Based SCH Release Switch)

[Description]


released according to the strength of the pilots in the active.



[Type]

Internal parameter

[Range and unit]


[Operating range]

0~ 3

[Recommended value]

0

[Setting tradeoff]

None

SCHRELBYLOADSW (Overload Based SCH Release Switch)

[Description]


released according to the load of the SCH.

[Type]

Internal parameter

[Range and unit]


[Operating range]

0~ 3

[Recommended value]

0

[Setting tradeoff]



Disabled when the SCH supports the soft handoff

SCHRELFRMDEL (Remained Frames Threshold for SCH Release)

[Description]

This parameter represents the threshold of remaining unprocessed frames of

the burst when a release decision is made. When the number of remaining

unprocessed frames of the burst is less than the threshold, the SCH will not be

released initiatively. All remaining frames may have been processed before the

initiative release takes effect, so the SCH is spontaneously released. Therefore,

the initiative release does not take effect and meaningless signalling operations

are caused.

[Type]

Algorithm parameter

[Range and unit]

0~ 255 (unit: 20ms frame)

[Operating range]

0~ 255

[Recommended value]

10

[Setting tradeoff]

Since there is a delay from time when the release decision is made to the time

when the relevant main bodies process the release operations, if the value of

this parameter is set too small, some meaningless signaling operations may be

caused. Otherwise, if the value of the parameter is set too large, the release

can not be triggered in time.



SCHRELTALFRMTHR (Total Frames Threshold for SCH Release)

[Description]

This parameter represents the threshold of total frames required to be

measured when the SCH is released according to the FER. Refer to

SCHRELBYFERSW (FER Based SCH Release Switch).

[Type]

Algorithm parameter

[Range and unit]

0~ 255 (unit: 20ms frame)

[Operating range]

0~ 255

[Recommended value]

10

[Setting tradeoff]

If the value of this parameter is set too small, the FER feed back by the PMRM

can not reflect the real frame error trend.

SCHRELFERFACTOR (FER Factor for SCH Release) [Description] This parameter represents (actual FER - target FER)/target FER 10, which

indicates the fade factor of call quality. When the FER exceeds (1+ fade factor

of SCH/10) target FER, the reverse SCH will be initiatively released. The

value of the parameter is 10 times the actual value. For example, the actual

meaning of the value “15” of this parameter is “1.5”.Refer to

SCHRELBYFERSW (FER Based SCH Release Switch)

[Type]

Algorithm parameter



[Range and unit]

0~ 255 (unit: 1/10)

[Operating range]

0~ 255

[Recommended value]

70

[Setting tradeoff]

None

SCHRELBRANSTREDIFF (Pilots Strength Difference Threshold for R-SCH)

[Description]

When the strength difference of the pilot of the branch of the SCH and the pilot

of the strongest branch exceeds the threshold, the SCH will be initiatively

released. Refer to SCHRELBYPILSTSW (Pilot Strength Based SCH Release

SCH Switch).

[Type]

Algorithm parameter

[Range and unit]

0~ 16 (unit: 0.5dB)

[Operating range]

0~ 16

[Recommended value]

4

[Setting tradeoffs] If the switch of SCH release based on pilot strength is open, release the SCH



based on the threshold, even in the SCH soft handoff.

SCHRELLDRELATHRESH (Overload Release Relative Threshold for SCH Release)

[Description]

When the load is SCHRELLDRELATHRESH and higher than the basic

admission threshold, the SCH will be initiatively released. Refer to

SCHRELSUMRATE (SCH Release Rate Sum (Based Overload)).

[Type]

Algorithm parameter

[Range and unit]

0~ 100 (unit: %)

[Operating range]

0~ 100

[Recommended value]

2

[Setting tradeoff]

None

SCHRELDTXDUR (DTX Duration)

[Description]

This parameter represents the allowable duration of Discontinuous

Transmission (DTX) of the MS on the reverse SCH. If the MS does not restart

transmitting data within SCHRELDTXDUR (DTX duration) after it stops

transmitting data on the reverse SCH, the MS will automatically release the



reverse SCH. This parameter is only used for the optimization of R-SCH

resources. If the parameter is set to “15”, it means that the function is disabled.

[Type]

Um interface parameter. (SCAM/ GHDM/ ESCAM)

[Range and unit] 0—15, for details, see table 5-1


[Recommended value]

9.

[Setting tradeoff] When reverse data service is demonstrated, the parameter can be set to 15.

SCHRELSUMRATE (SCH Release Rate Sum (Based Overload)) [Description] This parameter represents the sum of rates of the SCHs that are required to

be released once according to the load. This parameter specifies the

minimum total number of the 1X SCHs that are required to be released at one

time. If the recommended value is 4, current SCH is of 2X, release two 2X

SCH once to the total number of SCH released is of 2X. For Details, see

“SCHRELBYLOADSW (Overload Based SCH Release Switch)” [Type] Algorithm parameter

[Range and unit] 0--255, Unit: integral times of the rate of SCH






HARDASSIGNTYPE (Priority Assign Type)

[Description]

This parameter is one related to the hard assignment function. If the hard

assignment function is started, this parameter should be configured accordingly

so as to specify the standard of the carrier selection for hard assignment. For

example, the hard assignment can be performed according to the protocol

(IS95 or IS2000) of the MS or the service type (voice service or data service).

[Type]

Algorithm parameter

[Range and unit]

0~3. 0: The data call is first assigned to “carrier first for data service”, 1: Priority

assignment is performed for the voice call and data call, respectively, 2.

Assignment is performed according to the version of MS, 3: No priority

assignment is performed according to the protocol version of the MS or the

service type.

[Operating range]

0~ 3

[Recommended value]

3

[Setting tradeoff]

This parameter should be configured according to the requirements of the

customer and the network.

FWDSCH32XSW (Forward 32X SCH Switch) [Description] This parameter represents that the maximum allowable SCH rate is up to 32X.

When the switch is open, it indicates that the maximum allocated rate is 32X.

32X implemented through 128-order WALSH in the RC4.




[Range and unit] 0--1,0---The maximum allocated rate is 16X; 1—the maximum allocated rate

is 32X.




REVSCH32XSW (Reverse 32X SCH Switch) [Description] This parameter represents that the maximum allowable rate allocated by

reverse SCH is up to 32X. When the switch is open, it indicates that allocated

maximum rate is 32X.


[Range and unit] 0--1,0—Off, 1---ON.

[Operating range] 0--1.



FWDSCHSHOSW (F-SCH Soft Handoff Switch of) [Description] This parameter represents a switch setting, indicating that whether to allow to

enable forward SCH soft handoff function.

[Type]



Algorithm parameter

[Range and unit] 0~1, 0—Off, 1---ON.




REVSCHSHOSW (R-SCH Soft Handoff Switch) [Description] This parameter represents a switch setting, indicating whether to allow to

enable reverse SCH soft handoff function.


[Range and unit] 0~1, 0—Off, 1---ON




FWDSASTHR (F-SCH Handoff Initial Threshold) [Description] When forward SCH activation set is selected, determine whether to a branch

is added to SCH activation set based on decision variable and the parameter.

The decision variable is composed of two parts with different weights: forward

pilot strength measures the forward link, and reverse pilot strength measures

the reverse link.

[Type]




[Range and unit] -6300--0, unit: 1/200dB

[Operating range] -6300--0,

[Recommended value] -1200, that is, -6dB, which should not be modified

[Setting tradeoff] FWDSASMAXNUM (F-SCH Soft Handoff Maximum Branch Number) [Description] This parameter represents the maximum number of branches of forward SCH

soft handoff.





[Setting tradeoff] If this parameter is set large, SCH soft handoff ratio increases to occupy too

much forward resource and waste forward capacity. If the parameter is set

small, SCH soft handoff ratio decreases but soft handoff gain cannot be

utilized rationally to decrease transmission performance of data service.

FWDSASDYNSW (F-SCH Soft Handoff Dynamic Threshold Switch) [Description] This parameter represents that whether to allow forward SCH dynamical soft

handoff. It is similar to that of forward FCH, and it is controlled by BSC.




[Range and unit] 0 and 1,0---Off ,1---ON



[Setting tradeoff]

FWDSASSLOPE (F-SCH Soft Handoff Slope) [Description] The function is similar to that of “DYNSHOSLOPE (add branch to dynamical

threshold slope of activation set) and used when BSC performs dynamic soft

handoff decision. The difference lies in that the former is designated for SCH

but the latter for FCH.





[Setting tradeoff] For the setting, see SOFTSLOPE. The less the parameter, the higher the

calculated SCH soft handoff threshold and the less the SCH soft handoff ratio

is. But soft handoff gain cannot be used completely; the transmission

performance of data service is affected.

The larger the parameter, the less the calculated SCH soft handoff threshold,

and adjacent pilot is added easily to SCH activation set. Consequently, SCH

soft handoff ratio increases to guarantee transmission performance but too

many forward powers are consumed to decrease forward capacity.

FWDSASINTERCEPT (F-SCH Soft Handoff Intercept) [Description]



The function is similar to that of “DYNSHOINTERCEPT (add branch to

dynamic threshold interception of activation set)”, and used when BSC

performs dynamical soft handoff decision. The difference lies in that the

former is designated for SCH but the latter for FCH.


[Range and unit] -128--127



[Setting tradeoff] The less the parameter, the lower the calculated SCH dynamic soft handoff

threshold, and the higher the ratio of SCH soft handoff ratio is. But forward

capacity may be wasted. The higher the parameter, the higher the calculated

SCH dynamic threshold, and the lower the ratio of SCH soft handoff is. But

the soft handoff ratio cannot be used rationally to affect the transmission

performance of data service.

FWDSASWEIGHTECIO (F-SCH Soft Handoff Threshold EcIo Weight) [Description] This parameter is used in the variable decision when SCH activation set is

selected, reflecting the weight of forward link. The weight of corresponding

reverse link= 1 – this value.


[Range and unit] 0--100, indicating the percentage


[Recommended value]



100 (when forward SCH activation set is selected, reverse link is not

considered.)

[Setting tradeoff]

FWDSASADJECIODEALTA (Delta EcIo Threshold for F-SCH Soft Handoff Adjustment) [Description] When forward SCH activation is selected, adjust the activation set based on

rate decision. Forward pilot strength of each branch should be up a

requirement when this parameter adjusts SCH activation set branch.


[Range and unit] -63--0, unit: 0.5dB


[Recommended value] -12, namely, -6dB.

[Setting tradeoff] FWDSASADJRATEDELTA (Delta Rate Threshold for F-SCH Soft Handoff Adjustment) [Description]

When forward SCH activation set is selected, adjust the activation set based

on rate decision. The rate allocated by each branch should be up to a

requirement when this parameter adjusts the SCH activation set branch.


[Range and unit] 0--63,

[Operating range]



0--4, indicating the index of corresponding rate 0: 1X,,1:2X.,2:4X,3: 8X,4:

16X

[Recommended value] 1, that is, the difference of rate is 1.

[Setting tradeoff] REVSASTHRS (R-SCH Soft Handoff Initial Threshold) [Description]

When reverse SCH activation set is selected, compare a judgment threshold

reflecting reverse link with this parameter to determine whether to add certain

branch to reverse SCH activation set. Reverse pilot strength reflects current

reverse link.


[Range and unit] -255--0, Unit: 0.25dB


[Recommended value] -24, that is, select activation set of FCH as that of SCH, which should not be

modified.

[Setting tradeoff]

REVSASMAXNUM (R-SCH Soft Handoff Max. Leg Number) [Description] This parameter represents the maximum branch number of reverse SCH soft

handoff target set.







[Setting tradeoff] If this parameter is set large, SCH soft handoff ratio increases to occupy more

forward resources and waste forward capacity. If this parameter is set small,

SCH soft handoff ratio decreases. But you cannot utilize rationally soft handoff

gain to decrease data service transmission performance.

SCHTADD (SCH Soft Handoff Tadd) [Description] This parameter defines a prerequisite that BSC adds each branch in the FCH

activation set to SCH activation set. And then judge forward/reverse SCH

activation set after the prerequisite.


[Range and unit] -63--0, Unit: -0.5dB

[Operating range] -24 -- -28


[Setting tradeoff] SCHEXTSW (SCH Extension Switch) [Description] This parameter represents whether to enable SCH extension function.


[Range and unit] 0 and 1,0---Off,1--ON.


[Recommended value]



1

[Setting tradeoff] SCHEXTDURATION (SCH Extension Duration) [Description] This parameter represents duration size adopted by forward SCH extension.

[Type]


[Range and unit] 4--14,For details, see table 5-1.


[Recommended value] 10, that is 32 frames, which should not be modified

[Setting tradeoff] SCHEXTOVERLAP (SCH Extension Overlap) [Description] This parameter represents two neighbour overlay durations of forward SCH

extension.

[Type]


[Range and unit] 0--31, Unit: frame


[Recommended value] 2, that is 2 frames, which should not be modified

[Setting tradeoff] If this parameter is set large, the more two neighbour Durations overlay, the

lower the utilization of each Duration and the lower the extension efficiency.

Vice versa. If this parameter is set to 0, two neighbour Durations cannot



overlay, the higher the utilization of each Duration and the higher the

extension efficiency.

SCHEXTREQBUFFSW (SCH Extension Request Buffer Switch) [Description] This parameter represents whether to buffer SCH extension request.


[Range and unit] 0 and 1, 0--Off 1--ON


[Recommended value] 1-ON

[Setting tradeoff] JUDGETIMEOS (SCH Extension Judge Time Offset) [Description] This parameter that the number of frames to be processed for buffered SCH

extension request before the former SCH completes.. If the specified time

exceeds, this extension request is not processed again. This parameter is

used to determine whether the completion of extension request is earlier than

current SCH release.


[Range and unit] 0--31, Unit: frame


[Recommended value] 3, that is, 3 frames, which should not be modified

[Setting tradeoff]



SCHEXTMAXTIMES (SCH Extension Maximum Times) [Description] This parameter represents maximum SCH extension times.


[Range and unit] 0--65535, Unit: times

[Operating range] 0--65535,


[Setting tradeoff] Because forward SCH extension is obtained at high cost of inequality, it is the

extension of certain subscriber. For the subscriber downloading data, the

larger the parameter, the better the data transmission performance, but the

data request and transmission of other subscribers may be affected.

5.4 Service Redirection Parameters (SR_CFG) [Command name] MOD SRCFG (Algorithm Configuration/Modify Service Redirection

Parameter)

PLTTP (Pilot Type)

[Description]

This parameter represents the type of the current carrier. The MS determines

how to redirect the service according to the type of the current carrier.

0 – The current system is IS95A/95B cell, that is to say, the service will be

redirected to the IS2000 MS.

1 – The current system is the IS2000 cell, that is to say, the service will be

redirected to the IS95A/95B MS.



2 – The current system is the IS95A/IS2000 hybrid cell, that is to say, the

service will be redirected to the IS95B MS.

3 – The current system is the IS95A/IS95B/IS2000 hybrid cell, that is to say,

the service will not be redirected between different types of cells.

[Type]

(SRDM)

[Range and unit]

0~3. 0 – IS95A/95B cell, 1 – IS2000 cell, 2 – IS95A/IS2000 hybrid cell, 3 –

IS95A/95B/IS2000 hybrid cell

[Operating range]

0-3

[Recommended value]

This parameter should be configured according to the actual requirements.

[Setting tradeoff]

None

SRCELLTPSW (Re-direct Service Based on Local Cell Type)

[Description]

This parameter should be used together with the above parameter PLTTP. Only

when the switch is enabled, can the service be redirected according to the cell

type determined by the parameter PLTTP.

[Type]

Algorithm parameter

[Range and unit]

0~1. 0 – Off, 1 – ON

[Operating range]



0~1

[Recommended value]


[Setting tradeoff]

None

SRLOADSW (Re-direct Upon Congestion Switch)

[Description]

This parameter defines whether the service will be redirected upon congestion.

[Type]

Algorithm parameter

[Range and unit]

0~1. 1 – Yes, 0 – No

[Operating range]

0~1

[Recommended value]


[Setting tradeoff]

None

SRSW1 (Re-direct Illegal MS Switch)

[Description]

This parameter defines whether the illegal MS will be redirected.



[Type]

Algorithm parameter

[Range and unit]

0~1. 1 – Yes, 0 – No

[Operating range]

0~1

[Recommended value]


[Setting tradeoff]

None

SRSID (System ID)

[Description]

This parameter defines that the MS will be redirected to a specific system (SID).

If the SID is “0”, it means that the MS will not be redirected.

[Type]

Um interface parameter (SRDM).

[Range and unit] Integral of 15bit

[Operating range] 0-2^15

[Recommended value] If the MS needs to be redirected to a specific system (SID), the value of this

parameter will be set as the SID. Otherwise, it will be set to “0”.




SRNID (Network ID) [Description] If the MS needs to be redirected to a specific network (NID), the BTS will set

the value of this parameter as the NID. Otherwise, the BTS will set this

parameter to “65535”.

[Type] Um interface parameter (SRDM)

[Range and unit] 16bit

[Operating range] 16bit.

[Recommended value] This parameter should be configured according to the actual requirements


BANCLS (Band Class)

[Description]

This parameter is used to configure the band class of the target cell of the

redirection

[Type] Um interface parameter (SRDM)

[Range and unit] 0 ~ 9

[Operating range] 0 ~ 9



SRFREQX (Re-direct Service Target Frequency X)



[Description] These parameters are used to configure the target frequency for the

redirection. There are 6 target frequencies that can be configured for the

redirection, that is to say, parameters SR_FREEQ_1, 2, 3, 4, 5 and 6 can be

configured. The valid value is from 0 to 2047. These parameters should be set

to “65535 if no frequency is configured for the redirection.

[Type] Um interface parameter

[Range and unit]

0~2047 (valid frequencies) and 65535 (invalid target frequency)

[Operating range] 0~2047,65535.


[Setting tradeoff] Redirect frequency configuration of target cell according to actual

requirements.

6. System Messages

Configure all the tables based on sector carriers.

6.1 Synchronization Channel Message (SCHM) [Command name]

MOD SYSCMSG (New Command: MOD SCHM) (Modify SCHM)

LOCTMOFF (Local Time Offset) [Description] This parameter indicates the local time zone, namely, the offset of the local

time to the Greenwich Mean Time (GMT). China is located at GMT+8, the

LOCTMOFF sent through SCHM becomes 16 (16*30 minutes=8 hours).

Some countries still adopt the daylight saving time system. In fact, there is no

special-purpose field in the chip of Qualcomm to realize the daylight saving



time. If necessary, the daylight saving time can be realized only by modifying

the parameter LOCTMOF. If daylight saving time system is adopted at

GMT+8, one hour is faster, that is, configure 50 at LOCTMOF, namely,

GMT+9.

[Type]

Um interface parameter (SCHM)

[Range and unit]

0~63 (corresponding to -32 ~ 31) (unit: 30 minutes)

[Operating range]

0~ 63

[Recommended value]

48, namely, corresponding to 16 which represents Time Zone GMT+8.

[Setting tradeoff]

This parameter should be configured according to the time zone where the

system lies.

PRAT (Paging Channel Rate) [Description] This parameter represents paging channel rate. When this value is modified,

modify power allocation of paging channel correspondingly. For details, see

section Paging Channel Gain of Forward Power Allocation.

[Type] Um interface parameter (SCHM)

[Range and unit] 0~3:00 (corresponding rate: 9600bps); 01(corresponding self-rate: 4800bps).

10-Reserved, 11-reserved

[Operating range] 9600/4800bps

[Recommended value] 9600bps



[Setting tradeoff] This parameter is determined by paging channel capacity and forward link

service capacity requirements. Full rate is set at the cost of partial forward link

capacity to enhance paging channel capacity. If self-rate is used, paging

capacity decreases accordingly but service capacity of forward link increases.

CDMABSN (CDMA Channel No.)

[Description]

This parameter is used to assign frequencies and it represents the

corresponding CDMA channel number of the carrier frequency. The IS95 MS

uses this field.

[Type]


[Range and unit]

0~ 2047

[Operating range]

0~ 2047

[Recommended value]

This parameter should be configured according to the carrier frequency which

the IS95 MS is expected to use. If there is no special requirement for the

frequencies which the IS95 MS and IS2000 MS should use in the networking,

any normal carrier frequency under this sector can be configured.

[Setting tradeoff]

None

EXTCDMABSN (Extended CDMA Channel No.)

[Description]



This parameter is used to extend the assigned frequency and it represents the

corresponding CDMA channel number of the carrier frequency. The IS2000 MS

uses this field.

[Type]


[Range and unit]

0~ 2047

[Operating range]

0~ 2047

[Recommended value]

This parameter should be configured according to the carrier frequency which

the IS2000 MS is expected to use. If there is no special requirement for the

frequencies which the IS95 MS and IS2000 MS should use in the networking,

any normal carrier frequency under this sector can be configured.

[Setting tradeoff]

None

6.2 System Parameters Message (SPM) [Command name] MOD SPM (Modify System Parameter Message)

REGZN (Registration Zone) [Description]

This parameter represents the registration zone code of the sector. The

registration zone code also represents a group of BTSs with a given SID and

NID. The MS can get registered in more than one registration zone, which is

uniquely identified by SID, NID and REGZN. For details, see

IS2000-5(2.6.5.1.5).



[Type] Um interface parameter (SPM/ MSRM).

[Range and unit] 0x000~0xFFF (0 ~ 4095)

[Operating range] 0 ~ 4095

[Recommended value] 0-If the MS is to be registered by zone, the parameter should be configured

according to the assigned zone code.

[Setting tradeoff]

When setting a registration zone code, note that if the area of a registration

zone is set too large, the paging overhead may be so large that the paging

capacity could be insufficient, especially when there are many short messages.

On the other hand, if the area of a registration zone is too small, the paging

overhead will decrease while the paging capacity of the system will increase.

But the registrations will be so frequent that the reverse capacity will be

affected. Especially on the border of the registration zone, the mobile

terminated call and the access of the MS will become difficult.

TOTALZN (Number of Total Registration Zones to be Retained)

[Description]

This parameter represents the total number of registration zones that can be

reserved for the MS in the zone-based registration. The zone-based

registration is a basic registration method in the commercial network. Through

the zone-based registration, a location update can be originated in time when

the MS moves from one REGZN to another REGZN. In this way, the new

location of the MS can be learned in time at the network side. The MSC pages

the MS according to the Location Area Code (LAC). The division of ZONEs can

be kept consistent with the LAC.

[Type]



Um interface parameter (SPM/ MSRM)

[Range and unit]

0~7. “0” means that the zone-based registration is prohibited.

[Operating range]

0~ 7

[Recommended value]

1 ---If the zone-based registration is adopted, this parameter should be

configured as a nonzero.

[Setting tradeoff]

If this parameter is set more than “1”, the frequent registration of the MS on the

border of the registration zone can be avoided, but the location may fail to be

updated in time.

ZNTMR (Zone Timer Length)

[Description]

The MS will save the REGZN in the SPM into the ZONE list. If the MS fails to

receive the message containing REGZN within the time stipulated by this

parameter, the MS will delete this REGZN. Only when the zone-based

registration is used, that is, TOTALZN is not “0”, can this parameter take effect.

[Type]

Um interface parameter (SPM/ MSRM)

[Range and unit]

0-7, which correspond to the actual duration in the table below, respectively

Table 6-1 Zone Timer Value

Value (binary) Timer duration

(minute)



000 1

001 2

010 5

011 10

100 20

101 30

110 45

111 60

[Operating range]

0~ 7

[Recommended value]

2, namely, 5 minutes

[Setting tradeoff]

When TOTALZN is set more than “1”, this parameter can be set small so as to

lessen the effect on the paging.

MSID (Multiple SID Storage Indicator)

[Description]

This parameter indicates whether the MS is allowed to save SIDNIDLIST with

different SIDs.

[Type]

Um interface parameter (SPM).

[Range and unit]

0~1. 1– Yes, 0 – No

[Operating range]

0~1



[Recommended value]

0

[Setting tradeoff]

None

MNID (Multiple NID Storage Indicator)

[Description]

This parameter indicates whether the MS is allowed to save SIDNIDLIST with

the same SID but different NIDs.

[Type]


[Range and unit]

0~1. 1 – Yes, 0 – No.

[Operating range]

0~1

[Recommended value]

0

[Setting tradeoff]

None

MAXTSPRDIDX (Max Slot Timer Index)

[Description]

This parameter represents the maximum timeslot cycle index in the slotted

mode of the paging channel. The timeslot cycle = 1.28*2^i. The MS has the



parameter SPRDIDX, namely, preferred slot cycle index. The timeslot cycle

index (i) practically used is the smaller one of these two parameters.

[Type]


[Range and unit]

0~ 7

[Operating range]

0~2

[Recommended value]

1

[Setting tradeoff]

When this parameter is set small, the call setup delay can be reduced, but the

power consumption of the MS will increase, so the standby time is shortened.

On the contrary, the call setup delay is prolonged, but the power consumption

of the MS will decrease. If CCHINFOINCL is set to “1”, the BTS must contain

this field. Otherwise, it will neglect this field.

HOMEREG (Home Registration Indicator)

[Description]

This parameter indicates whether a non-roaming MS is allowed to be registered.

When this parameter is set to “1” and MOBTERMHOME (This parameter

means that the mobile terminated call indication is allowed in the home cell and

it is set in the MS) is also set to “1”, a non-roaming MS can automatically be

registered. The automatic registration includes power-up registration,

power-down registration, timer-based registration, zone-based registration and

distance-based registration.

[Type]




[Range and unit]

0~1. 1 – Yes, 0 – No.

[Operating range]

1, namely, the home registration is usually started

[Recommended value]

1

[Setting tradeoff]

None

FORSIDREG (SID Roamer Registration Indicator)

[Description]

This parameter indicates whether an MS roaming from other system is allowed

to be registered. When this parameter is set to “1” and MOBTERMFORSID

(This parameter is set in the MS) is also set to “1”, the MS roaming from other

system can automatically be registered. The automatic registration includes

power-up registration, power-down registration, timer-based registration,

zone-based registration and distance-based registration.

[Type]


[Range and unit]

0~1. 1 – Yes, 0 – No.

[Operating range]

0~1

[Recommended value]



1

[Setting tradeoff]

The setting of this parameter depends on whether a roaming MS is allowed to

be registered.

FORNIDREG (NID Roamer Registration Indicator)

[Description]

This parameter indicates whether an MS roaming from a foreign network is

allowed to be registered. When this parameter is set to “1” and

MOBTERMFORNID (This parameter is set in the MS) is also set to “1”, the MS

roaming from a foreign network can automatically be registered. The automatic

registration includes power-up registration, power-down registration,

timer-based registration, zone-based registration and distance-based

registration.

[Type]


[Range and unit]

0~1. 1 – Yes, 0 – No.

[Operating range]

0~1

[Recommended value]

1

[Setting tradeoff]

The setting of this parameter depends on whether a roaming MS is allowed to

be registered.



PWRUP (Power-up Registration Indicator)

[Description]

This parameter indicates whether the power-up registration is allowed, that is,

whether the MS is allowed to automatically get registered once it is powered up

and receives the system message. If this parameter is set to “1”, the MS can

automatically get registered. If it is set to “0”, the MS can not. To avoid multiple

registrations due to the quick power-up and power-down, the MS needs to wait

20 seconds to originate a registration after it enters the idle state.

[Type]


[Range and unit]

0~1. 1 – Yes, 0 – No.

[Operating range]

1

[Recommended value]

1

[Setting tradeoff]

None

PWRDWN (Power-down Registration Indicator)

[Description]

This parameter indicates whether the power-down registration is allowed, that

is, whether the MS is allowed to automatically get registered when switching

off.. If this parameter is set to “1”, the MS can automatically get registered. If it

is set to “0”, the MS can not. If the MS is not registered in the current system



and network, it can not be performed the power-down registration. The MS

performs the power-down registration before it is really powered down.

[Type]


[Range and unit]

0~1. 1 – Yes, 0 – No.

[Operating range]

1----Enabled for test

[Recommended value]

1

[Setting tradeoff]

None

PRMREG (System Message Parameter- Change Registration Indicator)

[Description]

This parameter indicates whether the parameter-change registration is allowed,

that is, whether the MS is allowed to automatically get registered when some

specific parameters saved in the MS are changed or when the MS enters a

new system. If this field is set to “1”, it means that the parameter-change

registration is allowed. If it is set to “0”, it means that the parameter-change

registration not allowed. These specific parameters set in the MS include:

1) SLOT_CYCLE_INDEX

2) BTS class mark (SCMp)

3) Mobile terminated call indication allowed (MOB_TERM_HOMEp

/MOB_TERM_FOR_SIDp/ MOB_TERM_FOR_NIDp )

4) The Band class, power level and RCs that the MS support.



In addition, the MS will perform the parameter-change registration as long as

the SID and NID in the SID_NID_LISTs saved in the MS do not match with

those of the BTS. Once the parameters are changed, the MS will delete all

SID_ NID_LISTs.

[Type]


[Range and unit]

0~1. 1 – Yes, 0 – No.

[Operating range]

0/1

[Recommended value]

1

[Setting tradeoff]

None

REGPRD (Time-Based Registration)

[Description]

This parameter represents the period of the timer-based registration of the MS.

The registration period = 2^(REG_PRD/4) 0.08 seconds. This parameter

means that the timer-based registration is not used if it is set to “0”. These

registration methods required by the protocols are used in co-ordination with

each other. The MS uses the timer-based registration only when a MS location

is not updated for a long time and the MS would be deactivated by the MSC if

the MS is not registered yet. But the MS will use other registration methods,

such as zone-based registration and parameter-change registration, when it

moves between location areas.

[Type]




[Range and unit]

0~85

[Operating range]

0 and 29~ 85

[Recommended value]

62 seconds, approximately one hour

[Setting tradeoff]

The registration period of this parameter corresponds with one fourth to one

third of the length of the deactivation timer configured at the MSC side.

Otherwise, the MS can not be paged because it is deactivated by the MSC.

BASELAT (BS Latitude)

[Description]

This parameter represents the latitude of the BTS in the format of degrees &

minutes & seconds, where “+” represents North latitude and “-“ South latitude.

[Type]


[Recommended value]

This parameter should be configured according to the actual latitude.

[Setting tradeoff]

The latitude must be accurate.

BASELONG (BS Longitude)

[Description]



This parameter represents the BTS longitude in the format of degrees &

minutes & seconds, where “+” represents east longitude and “-“ west longitude.

The minimum unit of second is 0.25 seconds.

[Type]


[Recommended value]

This parameter should be configured according to the actual longitude.

[Setting tradeoff]

The longitude must be accurate.

.

REGDIST (Distance-based Registration)

[Description]

This parameter represents the distance threshold and is used for the

distance-based registration. If the distance, between the location determined by

the latitude and longitude saved by the MS for the last registration and the

location determined by the latitude and longitude in the system message,

exceeds the threshold REGDIST, the MS will originates a registration.

[Type]


[Range and unit]

0~2047. “0” means that the distance-based registration is not used.

[Operating range]

0

[Recommended value]

0



[Setting tradeoff]

None

RESCAN (Re-scan Indicator)

[Description]

If the parameter is set to “1”, the MS will reselect a system and get reinitialized

after receiving the RESCAN message. If the MS still accesses the carrier of the

original sector after the rescan and the RESCAN message is still issued on the

paging channel, the MS will repeat the rescan process. This parameter is an

inherited parameter of the AMPS. Only when the contents in the sync channel

message are changed during the operation process, can this parameter take

effect.

[Type]


[Range and unit]

0~1. 0–off, 1–on.

[Operating range]

0

[Recommended value]

0

[Setting tradeoff]

None

6.3 System Message Control Parameters (SYS_MSG_CTRL_INFO) [Command name] This command is executed to modify overhead message control parameters,

such as types of the overhead messages to be sent.



EXTNBRLST (Extended Neighbour List Message Send Indicator)

[Description]

If the “EXTNBRLST” needs to be sent on the paging channel, this parameter

should be set to “1”. Otherwise, it should be set to “0”.The extended neighbour

list message is used for Band Class 1, instead of Band Class 0.

When the BNDCLS of the BTS is 1, 3 and 4, and the lowest protocol version is

less than 6, this parameter should be set to “1”. Otherwise, it should be set to

“0”. This parameter should be set according to the actual networking

requirement.

[Type]


[Range and unit]

0/1 (off/on)

[Operating range]

0/1

[Recommended value]

0

[Setting tradeoff]

None

GENNBRLST (General Neighbour List Message Send Indicator)

[Description]

If the Neighbour List Message Indicator needs to be sent on the paging channel,

this parameter should be set to “1”. Otherwise, it should be set to “0”. The

neighbour cells of different frequencies can be designated by the general

neighbour list message. If there are neighbour cells of different frequencies in



the network, and the inter-frequency idle handoff is necessary, this parameter

should be set to “1”.

[Type]


[Range and unit]

0/1 (off/on)

[Operating range]

0/1

[Recommended value]

0 (This parameter should be set to “1” for 450MHz cell.)

[Setting tradeoff]

None

GLBRDRCT (Global Service Redirection Message Send Indicator)

[Description]

If the “global service redirection message” needs to be sent on the paging

channel, this parameter should be set to “1”. Otherwise, it should be set to “0”.

After the MS receives the global service redirection message, it will leave the

current sector carrier and attempt to access a new channel according to the

contents in the message. This parameter can be used in the following cases: 1.

The current carrier is being maintained. 2. The current carrier is being

accessed or the traffic channel is overloaded. Only when the BTS version is 6

or above, can this system message be sent (Of course, the matching versions

of the BTS should be confirmed.)

[Type]




[Range and unit]

0/1 (off/on)

[Operating range]

0/1

[Recommended value]

0

[Setting tradeoff]

None

EXTGLBRDRCT (Extended Global Service Redirection Message Send Indicator)

[Description]

This parameter should be set to “1” if the “extended global service redirection

message” needs to be sent on the paging channel. Otherwise, it should be set

to “0”. Only when the BTS version is 6 or above, can this system message can

be sent (Of course, the matching versions of the BTS should be confirmed)

[Type]


[Range and unit]

0/1 (off/on)

[Operating range]

0/1

[Recommended value]

0

[Setting tradeoff]



None

EXTCHANLST (Extended CDMA Channel List Message Send Indicator)

[Description]

This parameter should be set to “1” if the “extended CDMA channel list

message” needs to be sent on the paging channel. Otherwise, it should be set

to “0”.

If the Extended CDMA Channel List Message (ECCLM) is to be sent, the

IS2000 MS uses the frequency list HASH in the ECCLM, while the IS95 MS still

uses the frequency list in the CDMA Channel List Message (CCLM). In this way,

the different carriers respectively used by IS2000 MS and IS95 MS can be

controlled.

[Type]


[Range and unit]

0/1 (off/on)

[Operating range]

0/1

[Recommended value]

0

Setting tradeoffs:

None

6.4 Access Parameter Message (APM) [Command name]



MOD APM (Base Station Controller Management\Configuration

Management\System Message Configuration\Modify Access Parameter

Message)

NOMPWR (Nominal Transmit Power Offset)

[Description]

This is an open loop power control parameter which represents the transmit

power offset. The MS uses this parameter to calibrate the estimated access

initial power at the time of the open loop power control. (Refer to INIT_PWR

(access initial power)).For the NOMPWREXT, see [Description] in the APM.

[Type] Um interface parameter (APM/UHDM/GHDM).

[Range and unit] -8 ~ 7, Unit: dB

[Operating range] -8 ~ 7(dB).


[Setting tradeoff] If this parameter is set large, the reverse initial transmit power will be high,

and additional interference will be brought to the reverse link. If the parameter

is set small, the power of the initial access probe will be so low that the BTS is

unable to receive it correctly, and the access rate and access success ratio

will be affected.

INITPWR (Access Initial Power Offset) [Description]

This is an open loop power control parameter which decides the initial transmit

power offset of the power probe frame. The parameter physically means that

the power of the first access probe frame can be adjusted so that the transmit

power could be slightly lower than the required power. The value of the



parameter can partially compensate the path loss difference caused by the

occasional dependency between forward and reverse CDMA channels.

[Type] Um interface parameter (APM)

[Range and unit] -16 ~ 15, Unit: dB.



[Setting tradeoff] The setting of this parameter should vary with the actual load. If the parameter

is set too large, the reverse capacity will be shocked and there will be a large

power redundancy. If the parameter is set too small, the access of the MS can

succeed only after multiple access probes. As a result, the access time of the

MS will be prolonged, or even the access may fail.

PWRSTEP (Power Control Step) [Description] This parameter represents the power increase necessary for the next access

probe when the previous access probe fails, namely, the power increase

between two sequential access probes. The number of access probes times

the access control step is the actual transmit power used for the access of the

MS.


[Range and unit] 0~7(dB)

[Operating range] 2~5 (The value of this parameter can not be greater than 5




[Setting tradeoff] If the parameter is set too large, the reverse transmit power may be so high

that the reverse interference could be intensified. If the parameter is set small,

the access of the MS can succeed only after multiple access probes.

NUMSTEP (Number of Access Probes)

[Description]

This parameter is used to set the number of access probes allowed in each

access probe sequence. The number of allowed access probes is NUMSTEP

plus 1.

[Type]

Um interface parameter (APM)

[Range and unit]

0~ 15

[Operating range]

3~6, that is to say, 4~7 access probes are allowed in each access sequence.

[Recommended value]

4

[Setting tradeoff]

The larger the value of this parameter is, the higher the access success ratio of

an access probe sequence is. But the reverse link interference may be

intensified accordingly. The access failure may be caused by the collision.

Furthermore, if the access fails, the call attempt interval will be longer. The

parameters NUMSTEP, PWRSTEP and INITPWR jointly decide the access

performance.



PSIST09 (Persistence Value for Access Overload Classes 0-9)

[Description]

This parameter represents the persistence value of the access load classes

0~9 of a normal call and determines the threshold P of the persistence

detection of the MS. The access attempt must pass the persistence detection

(For details, refer to IS95A-C6). According to the parameter P, the MS will

perform the pseudo random persistence detection in each timeslot after the

delay RS (A random number RP between 0 and 1 will be generated in each

timeslot. If RP < P, the access attempt will pass the detection. If the access

attempt passes the detection, the first access probe in the access probe

sequence will be sent in this timeslot. Otherwise, the MS will delay the access

probe sequence to the next timeslot to perform the detection. When P = 0, it

means the access probe fails. When the access channel request is not

originated when the MS performs a registration or sends an origination

message, P is calculated as follows:

[Type]

Um interface parameter (APM/EAPM)

[Range and unit]

0~ 63

[Operating range]

0~ 63

[Recommended value]



0

[Setting tradeoff] If this parameter is set to 0, MS accesses the system to perform persistence

detection. When the traffic load is too heavy, the increase of values of this

group of parameters will prolong the delay of access attempts and reduce the

access collisions.

PSIST1015 (Persistence Value for Access Overload Classes 10-15)

[Description]

This parameter represents the persistence value of the access load classes

10~15 of an emergency call and determines the threshold P of the persistence

detection of the MS. Refer to the description of PSIST09.

[Type]


[Range and unit]

0~ 7

[Operating range]

0~ 7

[Recommended value]

0

[Setting tradeoff]

After the traffic load becomes too heavy, the access rate of emergency calls

can remain unchanged, even though this group of parameters for emergency

call is not changed.

MSGPSIST (Persistence Modifier for Message Transmissions)

[Description]



This parameter represents the message transfer persistence correction value

during the access probe. Refer to the description of PSIST09. P*2 -MSG_PSIST will

be compared with RP during the access attempt for the message transfer.

[Type]


[Range and unit] 0~ 7

[Operating range]

0~ 7

[Recommended value]

0

[Setting tradeoffs]

None

REGPSIST (Persistence Modifier for Registrations)

[Description]

This parameter represents the access attempt message persistence correction

value during the registration (non-response registration request order). Refer to

the description of PSIST09. P* 2 -REG_PSIST will be compared with RP during the

access attempt for the message transfer.

[Type]


[Range and unit]

0~ 7

[Operating range]

0~ 7



[Recommended value]

0

[Setting tradeoff]

If this parameter is set to 0, MS accesses the system to perform REG_PSIST

immediately.

PRBPNRAN (Time Randomization for Access Channel Probes)

[Description]

This parameter is used to calculate the PN randomization delay. During one

access attempt, the precise transmission time of the access channel depends

on the PN randomization process. The transmission of the MS starts RN PN

chips later than the system time. RN is calculated from the HASH function and

ranges from 0 to 2 PROBE_PN_RAN-1 chips.

[Type]


[Range and unit]

0~ 9

[Operating range]

0~ 1

[Recommended value]

0

[Setting tradeoff]

When the reverse load is heavy, the access collisions can be reduced by

increasing the value of this parameter.



ACCTMO (Acknowledgement Timeout)

[Description]

This parameter represents the access probe response timeout time. After

(2+ACCTMO) 80ms, it will be considered that the BTS does not receive the

access channel message. The time between the basic access and response is

about 350ms, so this parameter is usually set to “3”.

[Type]


[Range and unit]

0~ 15 (unit: 80ms)

[Operating range]

2~ 5

[Recommended value]

3

[Setting tradeoff]

If the parameter is set too small, the MS will again send another access probe

request before receiving the response from the BTS. As a result, the load of the

access channel and the probability of collision will increase and the reverse link

interference will also be intensified. If the parameter is set too large, the access

process will be prolonged when an access attempt requires multiple access

probes.

PRBKOFF (ACH Probe Backoff Range) [Description] This parameter represents the maximum delay between access probes in an

access probe sequence. Common channel multiplex sublayer sends all the

access probes in an access sequence on the same R-ACH of current F-PCH,

send next access probe after an additional RT delay. Wherein, RT is



generated randomly from slots (0,1+PRBBKOFF). If common channel

multiplex sublayer selects randomly one from all the R-ACHs corresponding to

current F-PCH to send access probe, additional delay RT of next access

probe is generated randomly from slots (0,1 + PRBBKOFF).

[Type]


[Range and unit]

0~ 15 (1~16 timeslots at most)

[Operating range]

0~1 (1~2 timeslots at most)

[Recommended value]

0 (one timeslot at most)

[Setting tradeoff]

If the parameter is set too large, the access of the MS will be delayed in the

case that each access attempt consists of many access probes. If the

parameter is set too small, the probability of access probe collisions will

increase when the system load is heavy. If the system load is light, the

parameter can be set small. Otherwise, it can be set large.

BKOFF (ACH Probe Sequence Backoff Range)

[Description]

This parameter represents the maximum delay of sending an access probe

sequence -1. For an access probe sequence other than the first one, there is a

sequence delay RS, which is generated at random in (0, 1+BKOFF) timeslots.

[Type]




[Range and unit]

0~ 15 (1~16 timeslots at most)

[Operating range]

0~1 (1~2 timeslots at most)

[Recommended value]

0 (one timeslot at most)

[Setting tradeoff]

If the parameter is set large, the access collisions will be reduced but the

access of the MS will be delayed when the reverse traffic load is heavy.

MAXREQSEQ (Max. Number of Probe Sequences for an ACH Request)

[Description]

This parameter represents the maximum number of access probe sequences

of an access channel request (for example, origination).For an access probe

sequence other than the first one, there is a sequence delay RS, which is

generated at random in (0, BKOFF) timeslots.

[Type]


[Range and unit]

1~ 15

[Operating range]

2~3

[Recommended value]

2

[Setting tradeoff]



If the parameter is set large, the access success ratio may increase, but the

access channel capacity will be affected. If it is set too small, namely, to “1”, the

access probe sequence will not be re-sent. In view of the fluctuation of the

radio environment, it is recommended to set this parameter to “2” at least,

because the radio environment may get improved when the second access

probe sequence starts, even if the first access probe sequence fails.

MAXRSPSEQ (Max. Number of Probe Sequences for an ACH Response)

[Description]

This parameter represents the maximum number of access probe sequences

of an access channel response (for example, paging response).For an access

probe sequence other than the first one, there is a sequence delay RS, which is

generated at random in (0, BKOFF) timeslots.

[Type]


[Range and unit]

1~ 15

[Operating range]

2~3

[Recommended value]

2

[Setting tradeoff]

Refer to max. number of probe sequences at access channel request.

NOMPWREXT (Extended Nominal Transmit Power Indicator)

[Description]



This parameter represents the extended nominal power used in the open loop

power estimation. This parameter together with the nominal power (NOM_PWR)

is used to calibrate the offset of the BTS transmit power relative to the nominal

power.

[Type]

Um interface parameter (APM/UHDM/GHDM)

[Range and unit]

0~1. 0 – No (Not send), 1 – Yes (Send)

[Operating range]

0~1

[Recommended value]

0

[Setting tradeoff]

None

PSISTEMGINCL (Emergency Call Persistence Value Included)

[Description]

This parameter represents the emergency call persistence correction indicator,

which indicates whether the access attempt persistence of the MS whose

access load class is 0 ~9 is allowed to be corrected in emergency calls.

[Type]


[Range and unit]

0/1

[Operating range]



0/1

[Recommended value]

0

Setting tradeoffs:

None

PSISTEMG (Emergency Call Persistence Values for Access Overload Classes 0-9)

[Description]

This parameter represents the persistence correction value of the MS whose

access load class is 0~9 in emergency calls. If PSISTEMGINCL is set to “0”,

this parameter will be invalid. When PSISTEMGINCL is set to “1”, this

parameter should be set to “0” if the MS whose access load class is 0~9 is

allowed to transfer emergency call requests on the access channel. This

parameter should be set to “7” if no emergency call is allowed.

[Type]


[Range and unit]

0/1

[Operating range]

0/1

[Recommended value]

0

[Setting tradeoff]

None



6.5 Access Channel Parameters (A_CH) [Command name] MOD ACH (Base Station Controller Management\Configuration

Management\Cell Channel Management\ Modify Access Channel Parameter)

PCN (PCH No.) [Description]

This parameter constitutes the index of this table, together with module ID and

pilot number.



[Recommended value] Configure one record of this table based on the number of paging channel

configured.


ACHNUM (Number of Access Channels) [Description] The parameter represents the number of access channel related to each

paging channel.



[Operating range] 1

[Recommended value] 1 , that is one access channel




MAXLEN (Max. Message Length) [Description] The value of this parameter is the allowable maximum number of

frames that each access channel message can contain minus 3

[Type] Um interface parameter, APM

[Range and unit] 0~7 (3~10 frames)

[Operating range] 0~7. Each access channel message contains 3 ~ 10 access channel frames

[Recommended value] 3 or 4, that is, The allowable maximum number of frames each message can

contain 6 or 7.

[Setting tradeoff] If the value is set too small, larger access channel messages, such as the

origination message containing many dialed digits or Data Burst Message,

can not be sent. If the value is set too large, larger access channel messages

are allowed to be transmitted. Since it takes a long time to send these

messages, more message collisions will take place on the access channel

and the access channel capacity will decrease.

PAMLEN (Header Length)

[Description]

This parameter represents the preamble length of the access channel minus 1.

[Type]


[Range and unit]

0~15 (1~16 frames)

[Operating range]

2~3 (3~4 frames)



[Recommended value]

3 (4 frames), namely, the allowable maximum number of preamble frames that

each message can contain is 4.

[Setting tradeoff]

If the parameter is set too large, the access channel capacity will be wasted,

because (1+PAM_SZ) frames do not contain message contents. Maybe fewer

frames are enough for the BTS to capture the MS. If the parameter is set too

small, the probability of the BTS successfully detecting the MS will decrease.

As a result, the MS will resend the message for more times. The message

retransmissions may be doubled. This parameter adjustment is related to

search window size that BTS captures access channel.

6.6 Extended System Parameter Message (ESPM) [Command name] MOD ESPM (Base Station Controller Management\Configuration

Management\System Message Configuration\Modify ESPM)

PMSIDTP (Preferred ACH MS ID Type)

[Description]

This parameter represents the preferred MS identifier type. IMSI and ESN are

used to identify the MS.

[Type]

Um interface parameter (ESPM)

[Range and unit]

0~3.

[Operating range]

0~3

[Recommended value]



3

[Setting tradeoff]

None

BCIDX (Broadcast Slot Cycle Index)

[Description]

When the periodic broadcast paging is allowed, this parameter is set to any of 1

~7 to identify the broadcast timeslot cycle index. When the periodic broadcast

paging is prohibited, this parameter should be set to “0”. Broadcast period

=1.28 * 2^ i+0.24.

[Type]

Um interface parameter (ESPM/ MCRRPM)

[Range and unit]

0~7. “0” means that the periodic broadcast paging is prohibited.

[Operating range]

0

[Recommended value]

0

[Setting tradeoff]

None

PACKZNID (Data Packet Zone Indicator)

[Description]



This parameter represents the packet data service zone identification of the

BTS. If the packet data service is supported, this parameter will be set to a

nonzero. Otherwise, the parameter is set to “0”.

[Type]


[Range and unit]

8bit

[Operating range]

8bit

[Recommended value]


MAXALTSRV (Max. Number of Alternative Service Options)

[Description]

This parameter represents the Max. Number of Alternative Service Options and

identifies the maximum number of optional services that the MS is allowed to

select in origination message (ORM) and paging response message (PRM).

[Type]


[Range and unit]

0~7

[Operating range]

0~7

[Recommended value]

1



[Setting tradeoff]

None

RESELINCL (System Re-selection Parameters Included Indicator)

[Description]

This parameter indicates whether the system reselection parameter is included.

If the system reselection parameter is included, the parameter should be set to

“1”. Otherwise, it should be set to “0”.

[Type]


[Range and unit]

0/1

[Operating range]

0/1

[Recommended value]

0

Setting tradeoffs:

None

PLTRPT (Pilot Reporting Indicator)

[Description]

If it is necessary for the MS to report the additional pilots whose strength

exceeds TADD in all access channel messages, this parameter should be set

to “1”. If the parameter is set to “0”, these pilots will only be reported in the

ORM and PRM.



[Type]


[Range and unit]

0/1

[Operating range]

0

Recommended value: 0

[Setting tradeoff]

None

NBRSENTRY (Neighbour Set Access Entry HO Information Included Indicator)

[Description]

This parameter should be set to “1” if the neighbour set access switch message

identity is to be included. Otherwise, it should be set to “0”.

[Type]


[Range and unit]

0/1

[Operating range]

0/1

[Recommended value]

0

[Setting tradeoff]

None



ACSHO (Access HO Permitted Indicator) [Description] If NBRSENTRY is set to 1, the BTS includes this record field and set this

value based on the following descriptions. Otherwise, neglect the filed. That is,

if MS is allowed for access entry handoff with command and message

response sub-state, this parameter is set to 1. Otherwise, this parameter is set

to 0.


[Range and unit] 0/1


[Setting tradeoff] The system does not implement access entry handoff with this status but

supports access entry handoff with paging response sub-state.

NBRSETACSINF (Neighbour Set Access HO Info Included Indicator)

[Description]

If the neighbour set Access Probe HO Permitted is included, this parameter

should be set to “1”. Otherwise, it should be set to “0”.

[Type]


[Range and unit]

0/1

[Operating range]

0

[Recommended value]



0

ACCHO (Access Handoff) [Description] This parameter represents access handoff admission identification. For

example, NBRSETACCINFO is set to 1, the BTS includes this field and set

the value based on the following descriptions. Otherwise, neglect this value. If

MS is allowed to perform access handoff, the value is set to 1. Otherwise, this

value is set to 0.



[Operating range] 0



ACSPRBHO (Access Probe HO Permitted Indicator) [Description] The parameter represents access probe handoff admission identification.

NBRSETACCINFO is set to 1, the BTS includes this field and set the value

based on the following descriptions. Otherwise, neglect this value. If MS is

allowed to perform access probe handoff, this value is set to 1. Otherwise, this

value is set to 0.



[Operating range] 0





NBRSETSIZE (Neighbor Set Pilot Size) [Description] If “NBRSETNTRY” or “NBRSETACCINFO” is set to 1, this parameter is set to

as the number of pilots included in the NLM/ENLM/GNLM by the BTS.




[Recommended value] Generated by the system


MAXNUMPRBHO (Max. Number of Access Probe HOs Permitted) [Description] If the system allows for access probe handoff, this parameter must be set,

indicating the maximum times of access probe handoff by MS.







[Setting tradeoff]

ACCHOLSTUPD (Access HO List Update Permitted Indicator) [Description] If the system allows to access probe handoff, this parameter should be set,

indicating whether MS updates access handoff list during access probe.


[Range and unit] 0 and 1



[Setting tradeoff]

ACSHO (Access Handoff Permitted Indicator) [Description] If neighbor set access handoff information include identification is set to 1,

and NBRSETSIZE exists, this parameter must be set, indicating that the

identifications whether to allow for access probe handoff and access handoff.





[Setting tradeoff] If this parameter is set to 1, ACCPRBHO is set to 1, indicating that paging

response message and origination message are allowed for access probe



handoff. If this parameter is set to 1, ACCHO is set to 1, indicating that no

response message is allowed for access handoff.

ACCENTRYHO (Access Entry Handoff Indicator) [Description] If neighbor set access entry handoff including identification is set to 1, and

NBRSETSIZE exists, this parameter must be set, indicating that the

identification whether to allow for access entry handoff.





[Setting tradeoff]

ACCHOMSGRSP (ACCESS handoff Message Response Indicator) [Description] This parameter represents the identification whether message to be

responded is allowed for access handoff.



[Operating range] 0

[Recommended value] 0,

Because the system cannot implement access handoff for message to be

responded, this parameter is set to 0.

[Setting tradeoff]



ACCPRBEHOMSG (Access Probe Handoff Message Indicator) [Description] This parameter represents the label that whether the messages except

origination and paging response messages support access probe handoff.



[Operating range] 0


[Setting tradeoff]

BCGPSAUG (Broadcast GPS Assist Indicator)

[Description]

This parameter indicates whether the broadcast GPS assisting capability is

supported. If so, this parameter should be set to “1”. Otherwise, it should be set

to “0”.

[Type]


[Range and unit]

0/1

[Recommended value]

0

QPCHSPT (Quick Paging Channel Support Indicator)

[Description]



This parameter indicates whether QPCH is supported. If the number of quick

paging channels is set to “0”, this parameter should be set to “0”. Otherwise, it

should be set to “1”. If the quick paging channel needs to be used, the MSC

should support it and multiple tables should be configured for the BSC.

[Type]


[Range and unit]

0/1

[Operating range]

0/1

[Recommended value]

0

[Setting tradeoff]

If the quick paging channel needs to be supported, this parameter should be

set to “1”.

SDBSPT (SDB Support Indicator)

[Description]

This parameter indicates whether the short data burst is supported.

[Type]


[Range and unit]

0/1

[Operating range]

0/1



[Recommended value]

0

[Setting tradeoff]

If the MS is required to send short data burst on the common channel, this

parameter should be set to “1”.

REVCHGAIN (RTCH Gain Adjustment)

[Description]

This parameter represents the reverse link traffic channel gain relative to the

reverse pilot channel, namely, the offset of output power of the reverse traffic

channel whose rate is above RC2, relative to that of the reverse pilot channel.

The value of this parameter is the correction factor (in 0.125dB) of the reverse

traffic channel power of the MS and it is expressed by complement codes in

binary system.

[Type]


[Range and unit]

-32~31 (unit: 0.125dB)

[Operating range]

-32~31 (unit: 0.125dB)

[Recommended value]

0, namely, 0dB

[Setting tradeoff]

None



ECTHRS (EC Threshold)

[Description]

The parameter ECTHRS in ESPM is valid only when RESLECTINCL is set to

“1”. If Rx+10 log10 (PS) < ECTHRS – 115, the reselection condition of the

power threshold is satisfied.

[Type]


[Range and unit]

0~ 31

[Operating range]

0~ 31

[Recommended value]

30

[Setting tradeoff]

If RESLECTINCL is set to “0”, this group of parameters will not be used for the

MS to perform the reselection. If the reselection function is performed, that is,

RESLECTINCLE is set to “1”, the parameter ECTHRS should be set according

to the above formula.

EC/IOTHRS (Ec/Io Threshold)

[Description]

The parameter ECIOTHRS in ESPM is valid only when RESLECTINCL is set to

“1”.

[Type]




[Range and unit]

0~ 31

[Operating range]

0~ 31

[Recommended value]

30

[Setting tradeoff]

If RESLECTINCL is by default setting to “0”, this group of parameters will not

be used for the MS to perform the reselection. If the reselection function is

started, that is, RESLECTINCL is set to “1”, the parameter ECIOTHRS should

be set according to the above formula.

6.7 Neighbour List Messages (NLM) [Command name] MOD SYSMSGCTRL

In the version above R002B03, dynamic modification can be made on

AirBridge so that the system can issue GNLM. What the 450MHz system

issues is the GNLM.

PLTINC (PN Increment)

[Description]

This parameter represents the pilot PN sequence offset index increment.

The value of this parameter should be the greatest common divisor of all PN

sequences of the adjacent BTSs. For a given PILOT_INC, the number of PNs

available to the system is 512/PILOTINC.The smaller the value of this

parameter is, the more pilot PN offsets are available. As a result, the reuse

distance between pilots with the same phase will increase, and the interference



between them will be lessened, but the phase spacing between different pilots

will decrease, so pilot confusion may be caused.

If the value of this parameter is set large, the fewer pilot PN offsets are

available. As a result, the pilots in the remaining set will decrease and the time

the MS spends scanning pilots will also be reduced accordingly. In a practical

dynamic environment, the loss probability of a strong pilot signal will drop and

the available pilot PN offsets will decrease, so the reuse distance between

pilots with the same phase will decrease and the interference between them

will be intensified. This parameter also determines the maximum size of the

search window of the neighbour set and remaining set.

[Type]


[Range and unit]

1~15 (unit: 64PN chips)

[Operating range]

2, 4, 6 and 8

[Recommended value]

4

[Setting tradeoff]

The recommended value range is 2 ~ 6. In dense areas, this parameter can set

small, while in wide coverage areas, the parameter can be set large.

6.8 Global Service Redirecting Messages (GSRDM) [Command name] MOD GSRDM

RDRCTACCOLC (Redirected Access Overload Classes)

[Description]



If the MS is not used for the test or emergency purpose, the access overload

class of the MS is 0~9. The access overload class of the MS is the last decimal

digit of the IMSI of the MS. For example, if the IMSI of an MS is

460030912120003, the access overload class of the MS is 3. When the IMSI of

the MS is updated, the access overload class of the MS will also be updated.

The access overload class of the MS used for the test is 10, that of the MS

used for the emergency purpose is 11 and the access overload class 12~15 are

reserved.

Table 6-5 Redirection access overload level

Sub-field bit Sub-field

description

Sub-field bit Sub-field

description

ACCOLC_0 1 Access

overload class

0

ACCOLC_

8

1 Access

overload class

8

ACCOLC_1 1 Access

overload class

1

ACCOLC_

9

1 Access

overload class

9

ACCOLC_2 1 Access

overload

class2

ACCOLC_

10

1 Access

overload class

10

ACCOLC_3 1 Access

overload

class3

ACCOLC_

11

1 Access

overload class

11

ACCOLC_4 1 Access

overload class

4

ACCOLC_

12

1 Access

overload class

12

ACCOLC_5 1 Access

overload class

5

ACCOLC_

13

1 Access

overload class

13

ACCOLC_6 1 Access

overload class

6

ACCOLC_

14

1 Access

overload class

14



ACCOLC_7 1 Access

overload class

7

ACCOLC_

15

1 Access

overload class

15

[Type]

Um interface parameter (GSRDM).

[Range and unit]


[Operating range]

1~15

[Recommended value]

0

[Setting tradeoff]

If the MS is allowed to redirect, the corresponding bit of the access load class

of the MS should be set to “1”. Otherwise, it should be set to “0”.

RETFAIL (Return if Fault Indicator)

[Description]

This parameter represents the return fault ID. If the MS is allowed to return to

the system when it fails to select the system in accordance with the reselection

principle in the message, this parameter should be set to “1”. Otherwise, it

should be set to “0”.If the parameter is set to “1”, the MS may return to the

original carrier, resulting in the ping-pong effect.

[Type]

Um interface parameter (GSRDM)

[Range and unit]

0/1 (off/on)



[Operating range]

0/1

[Recommended value]

0

[Setting tradeoff]

None

EXCPREVMS (Exclude Redirection Indicator)

[Description]

If it is required that the MS whose MOBPREV=6 should be free from the effect

of the GSRDM, this parameter should be set to “1”. Otherwise, it should be set

to “0”.

[Type]

Um interface parameter (GSRDM)

[Range and unit]

0/1 (off/on)

[Operating range]

0/1

[Recommended value]

0

[Setting tradeoff]

None

RECTP (Redirection Record Type)

[Description]



Refer to Table 6-6

Table 6-6 Redirection record types

Description Record type (bin)

NDSS close indication '00000000'

Redirect to an analog system '00000001'

Redirect to the CDMA system '00000010'

Redirect to the TACS analog system '00000011'

Redirect to the JTACS analog system '00000100'

Other record types reserved

[Type]

Um interface parameter (GSRDM).

[Range and unit]

0~1 (0 – not redirect, 1 – redirect to CDMA system)

[Operating range]

0/1

[Recommended value]

1, namely, 2

[Setting tradeoff]

None

6.9 Extended CDMA Channel List Messages (CCLM) [Command name]

MOD ECCLM

RCQPCHSELINCL (RC Quick Paging Channel Selection Included)

[Description]



This parameter indicates whether the RC and QPCH choice is included. If the

number of included RCQPCHCAPIND (RCQPCH capacity indication) is

NUM_FREQ (number of CDMA frequencies), this parameter must be set to “1”.

Otherwise, it must be set to “0”.If QPCH is used, this parameter must be set to

“1”.

[Type]

Um interface parameter (ECCLM).

[Range and unit]

0/1 (off/on)

[Operating range]

0/1

[Recommended value]

1

[Setting tradeoff]

None

RCQPCHHASHIND (RC Quick Paging Channel HASH Indicator)

[Description]

This parameter means the RCQPCH HASH indication. If the parameter

RCQPCHSELINCL is set to “1”, the BTS must contain this field. Otherwise, the

BTS must neglect the field. If the relevant CDMAFREQ is included in the HASH

list of the MS supporting RC>2 or quick paging channel, this field must be set to

“1”. Otherwise, it must be set to “0”.When the extended CDMA channel list

message is sent on the broadcast control channel and the relevant

CDMAFREQ is one of the HASH list of the MS supporting the quick paging

channel, this field must be set to “1”.

[Type]

Um interface parameter (ECCLM).



[Range and unit]

0/1 (off/on)

[Operating range]

0/1

[Recommended value]

1

[Setting tradeoff]

None

6.10 Extended Global Service Redirection Messages (GSRDM) [Command name] MOD EGSRDM

RDRCTPREVINCL (Redirection Mobile Protocol Revision Included)

[Description]

This parameter indicates whether the protocol version of the MS which the

redirection applies to is included.

[Type]

Um interface parameter (EGSRDM).

[Range and unit]

0/1

[Operating range]

0/1

[Recommended value]

0



[Setting tradeoff]

If the redirection designated in the EGSRDM applies to some specific protocol

versions of the MS, this field must be set to “1”. Otherwise, it must be set to ”0”.

EXCPREV (Excluding Mobile Protocol Revision Indicator)

[Description]

This parameter indicates that the protocol version of the MS which the

redirection applies to is excluded.

[Type]


[Range and unit]

0/1

[Operating range]

0/1

[Recommended value]

0

[Setting tradeoff]

If REDIRECTPREVINCL is set to “1”, the BTS must contain this field.

Otherwise, the BTS must neglect this field. If the MOB_P_REV of the MS is

between REDIRECTPMIN and REDIRECTPMAX, and the MS is excluded from

global service redirection, this field must be set to “1”. Otherwise, if the

MOBPREV of MS is within the protocol versions designated by MINRDPREV

and MAXRDPREV, and the MS is under control of redirection, this field must be

set to “0”.

MINRDPREV (Min. Redirection Protocol Version)

[Description]



This parameter represents the lowest redirection protocol version.

[Type]


[Range and unit]

0~6

[Operating range]

0~6

[Recommended value]

0

[Setting tradeoff]

Configure the lowest protocol version by which operations (namely, redirection

is included or excluded) designated by EXCLPREVIND are allowed.

MAXRDPREV (Max. Redirection Protocol Version)

[Description]

This parameter represents the lowest redirection protocol version.

[Type]


[Range and unit]

0~6

[Operating range]

0~6

[Recommended value]

6

[Setting tradeoff]



Configure the highest protocol version by which operations (namely, redirection

is included or excluded) designated by EXCLPREVIND are allowed.

6.11 Global Neighbor List Message (GNLM) [Command name] MOD GNLM (System Message Configuration\Modify Basic GNLM)

SRCHMD (Search Mode)

[Description]

For the search modes and their values, see table 6-9

Table 6-9 Search modes

Value (bin) Description

00 No search priority or search window

01 Search priority

10 Search window

11 Search priority or search window

[Type]

Um interface parameter (GNLM).

[Range and unit]

0~ 3

[Operating range]

0~ 3

[Recommended value]

1

[Setting tradeoff]

This parameter should be set as required.



NBRCFGPNINCL (Neighbour Configuration and Pseudo Noise Code Offset Included)

[Description]

This parameter indicates whether the neighbour configuration and PN offset are

included.

[Type]


[Range and unit]

0/1

[Operating range]

0/1

[Recommended value]

1

[Setting tradeoff]

If the GNLM contains the field NBRCFGPNINCL, this field should be set to “1”.

Otherwise, the field should be set to “0”.

FRQFLDINCL (Frequency Fields Included)

[Description]

This parameter indicates whether the frequency field is included.

[Type]


[Range and unit]

0/1

[Operating range]



0/1

[Recommended value]

1

[Setting tradeoff]

If the GNLM contains the frequency field, this field should be set to “1”.

Otherwise, it should be set to “0”.

USETM (Use Timing Indicator)

[Description]

This parameter indicates whether the timing information is used.

[Type]


[Range and unit]

0/1

[Operating range]

0/1

[Recommended value]

0

[Setting tradeoff]

If the timing information of the BTS is used by the adjacent BTSs, this field

should be set to “1”. Otherwise, it should be set to “0”.

GLOBTXDRT (Global Transmission Duration)

[Description]



If the GLOBTMINCL is included and is set to “1”, the GLOBTXDUR will be

included and will be set in the following way; otherwise, this field should be

neglected. The BTS will set this field as the width of its’ transmit window. Within

each transmit period, the value of this field is equal to or greater than 3 (unit:

80ms).

[Type]


[Range and unit]

0 and 3~15 (unit: 80ms)

[Operating range]

0~6

[Recommended value]

0

[Setting tradeoff]

None

GLOBTXPRD (Global Transmission Period)

[Description]

If the GLBTMINCL is included and is set to “1”, the GLBTXPRD will be included;

otherwise, this field should be neglected. The BTS will set this field as the

period length (unit: 80ms).

[Type]


[Range and unit]

0~ 127 (unit: 80ms)



[Operating range]

0~ 127

[Recommended value]

0

[Setting tradeoff]

None

SRCHOFSINCL (Search Window Offset Included)

[Description]

This parameter represents the offset of the neighbour pilot channel search

window size.

[Type]


[Range and unit]

0~7

[Operating range]

0~7

[Recommended value]

0

[Setting tradeoff]

None

7. BTS Cell Attribute Parameters



7.1 Set BTS Reverse Chip Processing Parameters (SET_BTSREVCHP) The setting of reverse chip processing parameters of BTS channel processing

board is directed to the resource pool, that is to say, the parameters of all

channel processing boards in a resource pool are set the same.

CELLMD (Cell Mode)

[Description]

This parameter is used to configure the cell mode for the BTS.

[Type]

Algorithm parameter

[Range and unit]

0~1

[Operating range]

0 (common cell mode), 1 (macro cell mode)

[Recommended value]

None

[Setting tradeoff]

None

MAXRANUM (Max. Number of RACH)

[Description]

This parameter is used to set the maximum number of reverse access

channels that the BTS can search.

[Type]

Algorithm parameter



[Range and unit]

1~ 32

[Operating range]

1~ 32

[Recommended value]

2

[Setting tradeoff]

None

MAXREARCNUM (Max. Number of R-EACH and R-CCCH)

[Description]

This parameter is used to set the maximum number of R-EACH and R-CCCH

that the BTS can search. The meaning of this parameter is the same as that of

MAXRANUM. But this parameter is used for R-EACH and R-CCCH.

[Type]

Algorithm parameter

[Range and unit]

1~ 8

[Operating range]

1~ 8

[Recommended value]

The setting of this parameter depends on the requirement. The value of this

parameter is dependent upon the search range. At present, this system does

not support REACH. This parameter can be set to “1”.

[Setting tradeoff]



None

MINPAMSZ (Min. Preamble Frame Length of ACH)

[Description]

This parameter represents the length (PAM_SZ+1) of the access preamble

frame of the access channel.

[Type]

Algorithm parameter

[Range and unit]

0~15

[Operating range]

0~15

[Recommended value]

3

[Setting tradeoff]

The access rate of users will be affected if the parameter is set too large, so

will the access success ratio of users if it is set too small.

ENSCHWADJ (Dynamically Adjust Search Centre of Traffic Channel)

[Description]

This parameter indicates whether CSM5000 is allowed to automatically adjust

the centre of the search window.

[Type]

Algorithm parameter

[Range and unit]



Disable and enable

[Operating range]

Disable and enable

[Recommended value]

Enable

[Setting tradeoff]

None

CFM95 (Max. Number of Fingers Configured for Each IS-95 Channel)

[Description]

This parameter represents the maximum number of fingers resource configured

for each IS-95 channel.

[Type]

Algorithm parameter

[Range and unit]

4~6

[Operating range]

4~6

[Recommended value]

6

[Setting tradeoff]

If the parameter is set too large, the number of channels with minimum fingers

will become large. If the parameter is set too small, that is, 4 fingers can be

assigned to each channel at most, the assignment may fail when more than 4

fingers are to be assigned, so the performance advantages of the combination



of multi-path energies can not be used.CSM5000 restricts the fingers assigned

to each IS-95 channel within 6.

CFM2K (Max. Number of Fingers Configured for each IS2000 Channel)

[Description]

This parameter represents the maximum number of fingers resource configured

for each IS-2000 channel.

[Type]

Algorithm parameter

[Range and unit]

4~8

[Operating range]

4~8

[Recommended value]

8

[Setting tradeoff]

None

7.2 Set BTS Cell Parameters (SET_BTSCELLPARA)

MAXCELLR (Max Cell Radius)

[Description]

This parameter represents the maximum cell radius (unit: kilometer).The BTS

supports the normal working of MS within the range of the radius.

Geographically, this parameter refers to the longest distance that the BTS can

cover (from the BTS to the border of the coverage area).This parameter is used

to set the size of the reverse common channel search window. For example,



maxcellr = 39, that is, cell radius = 39km. Convert kilometer (diameter) into

chips 5×64chips, that is search window size of common channel. The search

window centre is set to the middle of common search window.

[Type]

Algorithm parameter

[Range and unit]

Cell mode Value range of parameter (chips)

Maximum cell radius (km)

Common cell mode

0~1024 125

Macro cell mode 0~2048 250

[Operating range]

Cell mode Operating range of maximum cell radius (km)

Common cell mode 0~125

Macro cell mode 126~184 and 217~250

[Recommended value]

1. In the BTS3612V100R002B02, the common cell mode and macro cell mode

can be modified. In other versions, the default mode is common cell mode.

2. In the BTS3612 V100R002B02 and earlier, and V100R002B01D001, this cell

radius obtained from BTS script is bidirectional. That is, cell diameter is

recommended as 80.

3. In the BTS 3612V100R001B02D008, V100R002B01D002 and

V100R002B01D003, this parameter represents this cell radius and is

recommended as 39.

4. In the BTS3612 V100R002B02, this parameter represents cell radius and is

recommended 40 (common cell mode) and 250 (macro cell mode).




MAXUSRSPD (Maximum User Speed) [Description] This parameter represents maximum user speed and is used to set 2000

searcher Doppler frequency deviation.

[Type] Intra-BTS parameter




[Setting tradeoff]

MAXSCHPAS (Max. Search Times of R-ACH, R-EACH or R-CCCH in Search Space)

[Description]

This parameter is used to set the times that the searcher traverses the search

space of R-ACH, R-EACH or R-CCCH within the time of preamble of R-ACH,

R-EACH or R-CCCH.

[Type]

Algorithm parameter

[Range and unit]

1~4

[Operating range]

1~4

[Recommended value]



3

[Setting tradeoff]

If the parameter is set too large, the preamble frame of R-ACH, R-EACH or

R-CCCH will unnecessarily be searched for many times. As a result, the

searchers resource available to other channels will be reduced, and

furthermore, false multi-paths may be reported. If the parameter is set too low,

it is possible that some preamble frames may be missed being detected

TCHSCHWSZ (Reverse Traffic Channel Search Window Size)

[Description]

This parameter is used to set the size of the traffic channel search window. The

value of this parameter represents the size of the traffic channel search window.

The BTS has a search window for each traffic channel. Only when the reverse

signal falls into the search window, can the BTS capture and demodulate the

signal.

[Type]

Algorithm parameter

[Range and unit]


[Operating range]

1~16

[Recommended value]

1

[Setting tradeoff]

None



SCHSOS (Initial Offset of Reverse Common Channel Searcher)

[Description]

This parameter is used to configure the initial position of the searcher.

[Type]

Algorithm parameter

[Range and unit]

0~16376

[Operating range]

0~16376

[Recommended value]

0

[Setting tradeoff]

None

PCM (power control mode)

[Description]

This parameter determines the method to send the reverse power control

command to the MS when no finger is locked on the reverse traffic channel.

Under the control of this parameter, the BTS can send the reverse power

control command to the MS and order the MS to increase the transmit power

and how much to increase, when no finger is locked on the reverse channel,

namely, before the BTS fails to capture the MS or after the MS is unlocked.

[Type]

Algorithm parameter

[Range and unit]



0~3. For the specific meanings, refer to Table7-3

Table 7-3 Meanings of values of the parameter

0 M0dB CSMDEF_PC_NO_GAIN. “0” means no power control is performed.

1 M25dB CSMDEF_PC_GAIN_25dB. “1” means +25dB/sec with a step of 1dB.



[Operating range]

0~3

[Recommended value]

1

[Setting tradeoff]

If the parameter is set too large, the MS will be ordered to increase the transmit

power rapidly. In this way, the BTS can quickly capture the MS. But if the total

time for recapturing the MS is long, the transmit power of the MS will quickly

exceed the target power, so the reverse link capacity will decrease. If the

parameter is set too small, it will take the MS a long time to increase the

transmit power to a level at which the MS can be recaptured. When the

parameter is set to “0” (no gain), the transmit power of the MS will remain

unchanged, and will always be lower than the level at which the MS can be

captured or recaptured.

8. Load Control Parameters

8.1 Forward Load Control Parameters (FWD_LOAD_CTRL_PARA) [Command name] MOD FLDCTRL

FWDINITTHR (Forward Initial Basic Threshold)



[Description] This parameter represents initial value of the basic admission threshold for

the forward load control. It is expressed in the permillage of the sector power.

If forward load is less than this threshold, allow for call, soft handoff and hard

handoff access.


[Range and unit] 0--65535, unit: 0.10%



[Setting tradeoff] If this parameter is set large, more calls can be accessed but the system

breaks down easily.

FWDMAXTHR (Forward Max Basic Threshold) [Description] This parameter represents maximum value of the basic admission threshold

for the forward load control. It is expressed in the permillage of the sector

power.






breaks down easily.



FWDMINTHR (Forward Min Basic Threshold) [Description] This parameter represents minimum value of the basic admission threshold

for the forward load control. It is expressed in the permillage of the sector

power.






breaks down easily.

FWDSTOBTHR (Forward SCH To Basic Threshold) [Description] This parameter represents SCH admission offset. It is the offset of the forward

SCH admission threshold relative to the forward basic admission threshold. It

is expressed in the permillage of the sector power.



[Operating range] [Recommended value] 100.

[Setting tradeoff]



If this parameter is set large, the threshold of SCH establishment is lower and

less SCHs are established. The more the limitation to data service

transmission, the more secure the system. Vice versa.

FWDSHOTOBTHR (Forward Soft Handoff To Basic Threshold) [Description] It is the offset of the soft handoff admission threshold relative to the forward

basic admission threshold. It is expressed in the permillage of the sector

power..



[Operating range] None


[Setting tradeoff] If this parameter is set large, the soft handoff admission threshold is higher

and satisfies more requirements for soft handoff to decrease call drops

caused by soft handoff limitation. Vice versa.

FWDSTARPWRTHR (Start Power Limit Threshold) [Description] This parameter represents that forward load prohibits the increase of each

carrier code channel to stabilize system when forward load is parameter value.

When the load exceeds this value, the code channel power cannot increase.

This parameter is expressed in the permillage of the sector power.






[Setting tradeoff] If this parameter is set large, the threshold prohibiting the increase of carrier

code channel is higher and satisfies more requirements for power increase to

decrease call drops caused by power increase limitation. However, the

system is more insecure. Vice versa.

FWDSTOPPWRTHR (Stop power Limit Threshold) [Description] This parameter indicates that forward load allows the increase of each carrier

code channel when forward load is this parameter value. At that time, neither

call access nor SCH establishment permits and such requirement as new soft

handoff power prohibits. After the load is less than this value, the power can

increase. It is expressed in the permillage of the sector power




[Setting tradeoff] If this parameter is set large, the threshold allowing for increase of carrier

code channel is higher and satisfies more requirements for power increase to

decrease call drops caused by power increase limitation. However, the

system is more insecure. Vice versa.

FWDTHRUPSTEP (Ec/Ior Threshold Up Step) [Description]



This parameter represents up Ec/Ior step of corresponding forward load

threshold. It is power up step during the adjustment of the admission threshold.

It is expressed in the permillage of the Ec/Ior.




[Setting tradeoff] FWDTHRDOWNSTEP (Ec/Ior Threshold Down Step) [Description] This parameter represents corresponding forward load threshold down step

during the control for Ec/Ior. It is the power down step during the adjustment of

the admission threshold. It is expressed in the permillage of the Ec/Ior.




[Setting tradeoff] FWDFERTHR (Forward Bad FER Threshold) [Description] This parameter represents whether this branch is worse based on the FER.

Calculate forward FER proportion based on the times that each branch call

exceeds parameter value within 10seconds. When the forward FER of the call

exceeds this threshold, the FER of the call is regarded as poor.

[Type]



Algorithm parameter

[Range and unit] 0—255 (Unit: %)


[Setting tradeoff] This value is generally set to more than 5.

FWDFERPROP (Forward Bad FER Proportion) [Description] When the percentage of poor FERs over a carrier exceeds this threshold, the

threshold will be adjusted. Judge forward FER proportion and compare it with

this value and determine whether to start the adjustment of forward load

threshold, that is, whether to increase “Ec/Ior Threshold Up Step” or decrease

“Ec/Ior Threshold Down Step”.


[Range and unit] 0--255, (unit: %)


[Setting tradeoff] FWDTHRADJMINNUM (Forward Threshold Adjust Min FCH Number) [Description] This parameter represents the minimum number of branches when actual

forward bad FER proportion should be calculated. When the number of

branches on a carrier exceeds this threshold, the threshold adjustment will be

started by” Forward Bad FER Threshold”,and“Forward Bad FER



Proportion” ,the system performs dynamic adjustment to basic admission

threshold, SCH establishment threshold and soft handoff admission threshold.




[Setting tradeoff]

EPACAVAL (Forward EPACA Valve) [Description] This parameter is used for Enhanced PACA (EPACA) function. It is the

admission threshold for the use of EPACA. It is expressed in the permillage of

sector gain. When BSC receives origination request or paging response from

MS, invoke internal parameters and query system resources. If forward load is

higher than this threshold, return the cause of “no available resource” and

then BSC notifies the MSC of the cause. MSC determines whether to release

the call for this user with priority.


[Range and unit] 0--65535, (unit: 0.1%)



[Setting tradeoff] The load is fluctuant. If this value is set high, MSC does not release the call

and the user with priority may fail to allocate resource. If this value is set small,

the call releases, which affects traffic measurement index.



8.2 Reverse Load Control Parameters (REV_LOAD_CTRL_PARA) [Command name] MOD RLDCTRL

RSSIMIN (Min. Rssi Noise) [Description] This parameter represents minimum value of the RSSI set at theory.


[Range and unit] 0--600, (Unit: 0.1dBm)

[Operating range] [Recommended value] 0, namely, -120dBm

[Setting tradeoff] RSSIINIT ( Init Rssi Noise) [Description] This parameter represents initial RSSI noise.


[Range and unit] 0—600 (unit: 0.1dBm)

[Operating range] [Recommended value] 0, namely, -120dBm

[Setting tradeoff]

LOWUSERNUM (Low User Number) [Description] This parameter represents equivalent users with lower reverse load.

Equivalent users are less than the parameter value, indicating that reverse

load is very low.





[Operating range] [Recommended value] 20,

[Setting tradeoff] HIGHUSERNUM (High User Number) [Description] This parameter represents equivalent users with reverse high load. Equivalent

users are more than this parameter value, indicating that reverse load is very

high.


[Range and unit] 0—255


[Setting tradeoff]

LOWMINTHR( Low Min. Threshold) [Description] This parameter represents a minimum threshold of RSSI rise when reverse

equivalent users are less than that of low load. In this case, normal access

admits. When the current load is within the low load range, the RSSI rise is

admitted when it is smaller than the current load.



[Operating range]



[Recommended value] 599,

[Setting tradeoff]

LOWMAXTHR (Low Max. Threshold) [Description] This parameter represents a maximum threshold of RSSI rise when reverse

equivalent user is in low load range. When the current load is within the low

load range, the RSSI rise is not admitted when it is larger than the current

load.


[Range and unit] 0—600 (Unit: 0.1dBm)


[Setting tradeoff] MIDMINTHR (Mid Min. Threshold) [Description] This parameter represents a minimum threshold of RSSI rise when reverse

equivalent user is in middle load range. When the current load is within the

middle load range, the RSSI rise is admitted when it is smaller than the

current load.






[Setting tradeoff] MIDMAXTHR (Mid Max. Threshold) [Description] This parameter represents a maximum threshold of RSSI rise when reverse

equivalent user is in middle load range. When the current load is within the

middle load range, the RSSI rise is not admitted when it is larger than the

current load.


[Range and unit] 0--600, unit: 0.1dBm.


[Setting tradeoff]

HIGHMINTHR (High Min. Threshold) [Description] This parameter represents a minimum threshold of RSSI rise when reverse

equivalent user is in high load range. When the current load is within the high

load range, the RSSI is admitted when it is smaller than the current load.




[Setting tradeoff] HIGHMAXTHR (High Max. Threshold)



[Description] This parameter represents a maximum threshold of RSSI rise when reverse

equivalent user is in high load range. When the current load is within the high

load range, the RSSI is not admitted when it is larger than the current load.




[Setting tradeoff] REVFERTHR (Reverse Bad FER Threshold) [Description] When the reverse FER of the call exceeds this threshold, the FER of the call

is regarded as poor.


[Range and unit] 0—100%


[Setting tradeoff] This value is more than 5

REVFERPROP (Reverse Bad FER Proportion) [Description] This parameter represents the value to start reverse admission adjustment in

which reverse FER proportion. When the reverse bad FER proportion calling

from the carrier exceeds the threshold and the load is within the RSSI middle

range, the call admission is restricted.




[Range and unit] 0—100%


[Setting tradeoff] FERMINNUM (FER Stat Min. FCH Number) [Description] This parameter represents the minimum number of branches when reverse

admission is adjusted dynamically based on “Reverse Bad FER Threshold”

and “Reverse Bad FER Proportion” and actual reverse FER proportion

should be calculated. Only when the call branch number in the carrier

exceeds the threshold, can the algorithm of bad FER proportion be performed

and the call admission of the RSSI middle range is restricted.


[Range and unit] 0 - 255


[Setting tradeoff] REV1XSCHTHROFFSET (1X SCH Threshold Offset) REV2XSCHTHROFFSET (2X SCH Threshold Offset) REV4XSCHTHROFFSET (4X SCH Threshold Offset) REV8XSCHTHROFFSET (8X SCH Threshold Offset) REV16XSCHTHROFFSET (16X SCH Threshold Offset) REV32XSCHTHROFFSET (32X SCH Threshold Offset) [Description]



Reverse data service SCH affects reverse load, so a new threshold is added

to allocation/release of data service, that is, add the offset to original RSSI

threshold and set different offsets for SCH of different rates (“y” represents

offset of SCH with different rates).



[Operating range] [Recommended value] The following table shows the details:

Rate SCH admission threshold offset (y)

1x 1 2x 2 4x 4 8x 8

16x 16 32x 32


8.3 Access Load Control Parameters (ACH_LOAD_CTRL_PARA) [Command name] MOD ALDCTRL

ACHHIGHTHR (Access Channel High Threshold) [Description] If access channel load exceeds this threshold, the MS access speed will be

slowed down.


[Range and unit] 1—99 (unit: %)

[Operating range]




[Setting tradeoff] ACHLOWTHR (Access Channel Low Threshold) [Description] If the access channel load is less than this threshold, the MS access speed

will be sped up.


[Range and unit] 1 - 99 (Unit: %)


[Setting tradeoff] ACHUPSTEP (Psist Up Step) [Description] It is the step used for the slowdown of the MS access speed.




[Setting tradeoff] ACHDOWNSTEP (Psist Down Step) [Description] It is the step used for the speedup of the MS access speed.






[Setting tradeoff] ACHMAXVAL (Psist Max. Value) [Description] Upper limit of access load adjustment.





[Setting tradeoff] Under high access load, to avoid long access time caused by long persistent

detection of MS, restrict the adjustment of upper threshold.

ACHADJDELAY (Psist Adjust Delay) [Description] Delay needed after adjusting the access channel load each time. This

parameter represents report period times of delay.


[Range and unit] 0--255, with the unit of times




[Setting tradeoff]

8.4 Service Resource Management Parameters (BSCRSM) [Command name] MOD BSCRSM

FWDLDCTRLSW (Forward Load Control Algorithm Selection) [Description] Forward load control switch. It indicates the mode of forward load control.


[Range and unit] 0 and 1,

0---R02 version, 1---R03 version


[Setting tradeoff] FWDTHRADJSW (Forward Threshold Adjust Switch) [Description] Whether to allow the forward load threshold to perform dynamic adjustment


[Range and unit] 0 and 1,0---Off,1---On.


[Setting tradeoff]



FWDSCHPWRESTSW (Forward SCH Power Estimate Switch) [Description] Whether to enable the forward SCH power estimate switch.


[Range and unit] 0 and 1,0---Off, R02 version, that is, BSC fixed configuration. 1---On


[Setting tradeoff] REVLDCTRLSW (Reverse Load Control Algorithm Selection) [Description] It indicates the mode of reverse load control


[Range and unit] 0 and 1,0---R02 version 1---R03 version



[Setting tradeoff] RSSINOISALGSW (RSSI Noise Estimating Algorithm Selection) [Description] It indicates the mode of RSSI back noise estimation.


[Range and unit]



0 and 1,0---Solution one, 1---Solution two



[Setting tradeoff] ACHLDCTRLSW (Access Channel Load Ctrl Switch) [Description] Whether to enable the access load control switch.


[Range and unit] 0 and 1,0—Off,1---On.



[Setting tradeoff]

9. TCP Optimization Parameters

[Command name] MOD MAPARA

MASWITCH [Description] This parameter represents whether to enable TCP optimization function, that

is Mobile Agent (MA) Function.


[Range and unit]



0 and 1, 0--ON,1---Off




MAIPCOMPRESS [Description] This parameter represents whether to allow IP header compression-TCP/IP

Van Jacobson Compression


[Range and unit] 0 and 1, 0---Prohibited, 1--Allowed



[Setting tradeoff] MACCP [Description] This parameter represents whether to allow Compression Control Protocol

(CCP) negotiation.




[Recommended value]



0.


MAECP [Description] This parameter represents whether to allow Encryption Control Protocol (ECP)

negotiation.






MTUMODIFY This parameter represents whether to allow to modify Maximum Transmission

Unit (MTU) option.





[Setting tradeoff]



MTUVALUE [Description] This parameter represents the size of Maximum Transmission Unit (MTU),

eliminating overhead of TCP/IP header, that is Maximum Segment Size

(MSS).


[Range and unit] 472--1460, with the unit of byte


[Setting tradeoff]

Documents

CDMA1X BSS Network Planning Parameter Configuration …alfin.dosen.st3telkom.ac.id/wp-content/uploads/sites/8/2015/12/... · Abis interface between BTS and BSC BTS ... This guide