CDMA1X BSS Network Planning Parameter Configuration Guide(R

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)

[Type] Um interface parameter (ESPM)

[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=10-0.7100% =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

1120.125=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)

1NO (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] 0relative 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] 0Off 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] 0relative 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

[Operating range] 3--10

[Recommended value] 5, which should not be recommended

[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] -2550, with the unit of 0.125dB

[Operating range] -2550



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. [Type] Algorithm parameter



[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.


[Range and unit] 0~255


[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:

z RLGAIN_TRAFFIC_PILOTs: Efficient for reverse FCH, reverse SCH and DCCH. They are delivered to MS through

ESPM.

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

z 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.

z 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.

z Reverse_Channel_Adjustment_Gain: Similar to Attribute_Adjustment_Gain. This parameter is abbreviated as

RCAG.

z 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

[Operating range] -48~48

[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]

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

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

Documents

CDMA1X BSS Network Planning Parameter Configuration Guide(R