Guide to CDMA2000 1X BSS Network Planning Parameter Settings (for Customer)-20060315-C-2.0

Document number Product name CBSCV200R001

Intended user Customer engineers Product version

Drafted by Document version V2.0

Guide to CDMA2000 1X BSS Network Planning Parameter

Settings

Prepared by Radio network planning department Date July 2005

Reviewed by Radio network planning department Date July 2005

Reviewed by CDMA radio network planning department Date December 2005

Approved by Date

Huawei Technologies Co., Ltd. All rights reserved

Guide to CDMA1X BSS Networking Planning Parameter Settings Confidentiality level

2007-7-25

All rights reserved Page 2 of 214

Table of Contents

Chapter 1 About this Document ................................................................................................................. 7 1.1 Release Notes .................................................................................................................................... 7 1.2 Conventions ...................................................................................................................................... 7 1.3 Network Planning-related Parameters.......................................................................................... 7

Chapter 2 Forward Power Distribution Parameters .............................................................................. 10 2.1 Sector Carrier Gain......................................................................................................................... 10 2.2 Pilot Channel Parameters .............................................................................................................. 12 2.3 Synchronization Channel Gain..................................................................................................... 13 2.4 Paging Channel Parameters.......................................................................................................... 13 2.5 Quick Paging Channel Gain.......................................................................................................... 15

Chapter 3 Proposals for Power Control Parameter Settings ................................................................ 18 3.1 Description of Special Representations ....................................................................................... 18

3.1.1 Set value of Reverse Outer Loop....................................................................................... 18 3.1.2 Transmit Power of Forward Traffic Channel .................................................................. 18 3.1.3 Eb/Nt Set Value of Forward Fast Power Control........................................................... 19 3.1.4 Representation of FER ........................................................................................................ 19

3.2 BSC Level Power Control Parameters ......................................................................................... 20 3.3 Reverse Closed Loop Power Control Parameters ...................................................................... 25 3.4 Forward Slow Power Control Parameters .................................................................................. 41 3.5 Forward EIB Power Control Parameters..................................................................................... 47 3.6 Forward Fast Power Control Parameters.................................................................................... 51 3.7 Target FER Configuration ............................................................................................................. 66

Chapter 4 Handoff Parameters.................................................................................................................. 71 4.1 Module Handoff Paraameters ...................................................................................................... 71 4.2 Handoff Parameters ....................................................................................................................... 77 4.3 Pilot Handoff Algorithm Switch Paraemters.............................................................................. 87 4.4 Same-Frequency HHO Parameters.............................................................................................. 88 4.5 Candidate Pilot Search Control Parameters ............................................................................... 91 4.6 Mobile Assisted HHO Parameters ............................................................................................... 97 4.7 Handdown HHO Parameters ..................................................................................................... 100 4.8 Direct HHO Parameters .............................................................................................................. 102 4.9 Pilot Beacon HHO Parameters ................................................................................................... 103 4.10 Pilot Measurement Request Parameters.................................................................................. 105

Chapter 5 Channel Assignment .............................................................................................................. 108 5.1 Channel Information.................................................................................................................... 108 5.2 SCH Assignment Parameters...................................................................................................... 117 5.3 Module-level Channel Parameters............................................................................................. 132 5.4 Service Redirection Parameters .................................................................................................. 153

Chapter 6 Overhead Messages ................................................................................................................ 157 6.1 Synchronization Channel Messages .......................................................................................... 157 6.2 System Parameter Messages ....................................................................................................... 160 6.3 Overhead Message Control Information................................................................................... 169 6.4 Access Parameter Messages........................................................................................................ 173 6.5 Access Channel Parameters ........................................................................................................ 183 6.6 Extended System Parameter Messages ..................................................................................... 185 6.7 Neighbor List Messages............................................................................................................... 196 6.8 Global Service Redirection Messages ........................................................................................ 197 6.9 Extended CDMA Channel List Messages ................................................................................. 200


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6.10 Extended Global Service Redirection Messages..................................................................... 202 6.11 General Neighbor List Messages.............................................................................................. 204

Chapter 7 BTS Cell Attribute Parameters ............................................................................................. 207 7.1 Setting BTS Reverse Chip Processing Parameters ................................................................... 207 7.2 Setting BTS Cell Parameters........................................................................................................ 210


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List of Tables

Table 2-1 Relationship between sector gain and output power .........................................................11

Table 2-2 Quick paging channel power offset ......................................................................................16

Table 3-1 Target FER ................................................................................................................................20

Table 3-2 Recommended values .............................................................................................................28







Table 4-1 Search window size .................................................................................................................78

Table 4-2 Relationship between TTDROP and timer expiration........................................................82

Table 4-3 Relationship between the parameter value and actual period..........................................97

Table 5-1 Representation methods of SCH_DURATION .................................................................124

Table 6-1 Zone Timer values .................................................................................................................161

Table 6-2 Redirection access overload classes ....................................................................................198

Table 6-3 Redirection record type.........................................................................................................200

Table 6-4 Search mode and values .......................................................................................................204

Table 7-1 Meanings of parameter value ..............................................................................................214


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Guide to CDMA2000 1X BSS Parameter

Settings

Key words: cdma2000, BSS, radio resource management, forward channel power distribution, power control algorithm parameters, handoff algorithm parameters, channel assignment, overhead message, and BTS cell attribute parameters

Abstract: This document depicts an in-depth description of the parameters related to cdma2000 network planning, suggestions on parameter settings, and advantages & disadvantages of different settings. 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 indexes. The specific parameters are forward channel power distribution parameters, power control algorithm parameters, handoff algorithm parameters, channel assignment parameters, overhead message parameters and BTS cell attribute parameters.

Acronyms and abbreviations:

Acronyms Description

Abis interface Interface between BTS and BSC

BTS Base Transceiver System

BSC Base Station Controller

CDMA Code Division Multiple Access

ECAM Extended Channel Assignment message

Ec/Io

Pilot energy accumulated over one PN chip period (Ec) to the total power spectral density. Io means the total power of effective signal and noise in the signal band.

Ec/Ior EC means pilot chip power, and IOr means forward transmit total power of BTS, and Ec/Ior means the percentage of pilot power to total transmit power of BTS

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


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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


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Chapter 1 About this Document

1.1 Release Notes

This document applies to BSCV200R001C02.

This document is revised based on Guide to CDMA20001X BSS Network Planning Parameter Settings-V100R003C03, so it applies to V100R003C03B118 and V200R001C02.

This document modifies recommended values of parameters in V200R001. On-site engineers must use the recommended values of parameters as required.

1.2 Conventions

Each item of parameters is described as follows:

[Type]

It determines that the parameter is an internal algorithm parameter or an Um interface parameter. The Overhead message carrying Um interface parameter also must be described.

[Range and Units]

It means the value range of this parameter and is closely related to data structure used by the parameters.

[Operating Range]

It means the allowed range of parameter during the adjustment. The parameters are adjusted within this range during the network optimization.

[Recommended Setting]

It means the commonly used value, but is not applicable to any cases. According to actual conditions, see [Setting tradeoffs] to define values of the parameters. If the default value on the Airbridge Maintenance System is inconsistent with recommended value in this document, the recommended value prevails.

[Setting Tradeoffs]

It means the effect after values of the parameters increase or decrease.

The representation and conversion methods of power control and forward power distribution-related parameters are described in 3.1 . In this document, EcIo stands for Ec/Io and EbNt stands for Eb/Nt.

1.3 Network Planning-related Parameters

SN Type SQL table Configuration items Dynamic


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configuration command

1 Sector carrier gain PILOT TXGAIN and SCTGAIN MOD CDMACH

2 PILOT_CH PLTCHGAIN MOD PLTCH

3 SYNC_CH MOD SYNCH

4 P_CH PCHGAIN (configured according to paging channel No.) and BCMD

MOD PCH

5

Common channel

QP_CH QPCHNUM , QPCHRT , PWRLEVCFG , and PWRLEVPAGE

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 BSC Level 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 HHOMAHHOPARA

Mobile Assisted HHO Parameters MOD HHOMA

17 HHOHANDDOWNPARA Handdown HHO Parameters MOD HNDDWN

18 HHODIRECTPARA Direct HHO Parameters MOD DRCT

19

Handoff

HHOPILOTBEA Pilot Beacon HHO MOD HHOBPLT


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CONPARA Parameters

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 HHO Target Carrier

ADD HNDDWNTRG,

RMV HNDDWNTRG,

LST HNDDWNTRG,

MOD HNDDWNTRG

25

HHODIRECTTARG Direct HHO Target Carrier

ADD DRCTTRG,

RMV DRCTTRG,

LST DRCTTRG,

MOD DRCTTRG

26 CH_INFO Channel Information MOD CHINF

27

Channel management

SCH_PARA SCH Allocation Parameters MOD


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LOADCTRLPARA

28 MCHM Module-Level Channel Management Parameters MOD MCHM

29

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 Messages MOD ESPM

36 NLM Neighbor List Messages MOD SYSMSGCTRL

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

Overhead Messages

GNLM General Neighbor List Messages MOD GNLM

Chapter 2 Forward Power Distribution Parameters

2.1 Sector Carrier Gain

[Command name]

MOD CDMACH (Base Station Controller Management\Configuration Management\Cell Channel Management\Modify Sector Carrier Parameters)

TXGAIN (RF Gain)

[Description]

It sets the attenuation.

[Type]

It is an internal algorithm parameter.

[Range and Units]


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0–24, in the unit of dB

[Operating Range]

0–20


0

[Setting Tradeoffs]

The value of this parameter depends on the required output power. The recommended value should not exceed 20 dB.

The total attenuation of RF gain and power amplitude limitation processing unit is 24 dB. Therefore, the RF gain must be less than 20 dB so that 4 dB is reserved for the power limitation-processing unit.

An external attenuator is required to obtain a lower forward output power.

SCTGAIN (Baseband Gain)

[Description]

It sets baseband gain.

[Type]


[Range and Units]

0–4095

[Operating Range]

500–3200


3000

[Setting Tradeoffs]

The value of this parameter depends on required output power.

The relationship between set value and received transmit power is shown as: P= 20*log (SCTGAIN / 3000) + 43 - TXGAIN (dBm).

Currently, the forward output power is changed by using TXGAIN and external attenuator, instead of modifying BTS gain.

Table 2-1 Relationship between sector gain and output power

Sector gain Output power (dBm)

3000 43

2500 41.4

2000 39.5


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1500 37

1000 33.5

500 27.3

2.2 Pilot Channel Parameters

[Command name]

MOD PLTCH (Base Station Controller Management\Configuration Management\Algorithm Configuration\Cell Channel Configuration\Modify Pilot Channel Parameters)

PLTCHGAIN (Pilot Channel Gain)

[Description]

It sets pilot channel power and represents the percentage to total power.

[Type]

It is an internal BSC parameter.

[Range and Units]

-255–0, in the unit of 0.25 dB

For the conversion methods, see 3.1 .

[Operating Range]

-40 to -21, that is, 10%–30%


-28

[Setting Tradeoffs]

The actual range is -63.75–0dB, that is, -255–0, and the step is 0.25 dB. The recommended value by Qualcomm is -7.5 dB.

The capacity and coverage must be considered into setting the ratio of PICH power to total sector carrier.

If many transmit powers are allocated for pilot channel, the coverage area is larger, but the transmit power for traffic channel is small and the capacity decreases.

When the PICH gain is high, forward power and reverse power must be balanced.

In the dense urban areas, the cell coverage areas are small, the SCTGAIN is not changed, and the PICH gain is relatively small. In this case, the coverage areas are ensured and the capacity increases, accordingly.


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2.3 Synchronization Channel Gain

[Command name]

MOD SYNCH (Base Station Controller Management\Configuration Management\Cell Channel Configuration\Modify Synchronization Channel Parameters)

SYNCHGAIN (Synchronization Channel Gain)

[Description]

It sets the synchronization channel gain and the percentage to total power is represented in dB.

[Type]


[Range and Units]

-255–0, in the unit of 0.25dB


[Operating Range]

-80 to -61


-68

[Setting Tradeoffs]

The actual range is -63.75–0dB, that is, -255–0, and the step is 0.25 dB. Synchronization channel gain= pilot channel gain - 10dB (this value is recommended by Qualcomm based on the simulation result).

The fixed ratio is kept and the coverage area of synchronization channel is the same as that of pilot channel.

2.4 Paging Channel Parameters

[Command name]

MOD PCH (Base Station Controller Management\Configuration Management\Cell Channel Configuration\Modify Paging Channel Parameters)

PCHGAIN (Paging Channel Gain)

[Description]

It sets paging channel power and the percentage to total power is represented in dB.

[Type]



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[Range and Units]



[Operating Range]

The operating value depends on pilot channel gain.


When the PICH gain - 1.5 dB, that is, if PICH gain is -28, the recommended value is -34 (the paging rate is 9600 bit/s, that is, PRAT=0)

[Setting Tradeoffs]

The actual range is -63.75–0dB, that is, -255– 0 and the step is 0.25 dB. The paging channel gain is related to paging channel power.

If the paging channel rate is 9600 bit/s, paging channel gain=pilot channel gain - 1.5dB. If the paging channel rate is 4800 bit/s, paging channel gain=pilot channel gain - 4.5dB (this value is recommended by Qualcomm based on simulation result).

The paging channel rate is configured in PRAT filed of the Synchronization Channel Message (SCHM). If PRAT=0, the paging channel rate is 9600 bit/s. If PRAT=1, the rate is 4800 bit/s.

BCMD (Broadcast Mode)

[Description]

It sets the broadcast mode of paging channel, multislot or periodic broadcast.

When MS works in a multislotted mode and monitors paging channel, BTS transmits the broadcast messages in multislotted mode or periodic broadcast mode.

Currently, the product supports multislotted mode only.

[Type]

It is an Um interface parameter.

[Range and Units]

Multislotted mode or periodic broadcast mode

[Operating Range]

Multislotted mode


Multislotted mode

[Setting Tradeoffs]

None


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2.5 Quick Paging Channel Gain

[Command name]

MOD QPCH (Base Station Controller Management\Configuration Management\Cell Channel Configuration\Modify Quick Paging Channel Parameters)

QPCHNUM (Number of Quick Paging Channel)

[Description]

It sets the number of quick paging channel.

According to the protocols, this field is configured, and set to 0 when QPCHSPT is 1.

If QPCHSPT is set to 0, BTS neglects this field.

[Type]

It is an Um interface (ESPM) parameter.

[Range and Units]

0–3

[Operating Range]

0–3


0 (QPCH is not used)

[Setting Tradeoffs]

None

QPCHRT (Quick Paging Channel Date Rate)

[Description]

It sets the QPCH date rate (for the paging channel, 0 indicates 9600 bit/s. For the quick paging channel, 0 indicates 4800 bit/s).

[Type]

It is an Um interface parameter (ESPM).

[Range and Units]

0 and 1

0 indicates 4800 bit/s and 1 indicates 9600 bit/s

[Operating Range]

0 and 1


This recommended value is 0 and the rate is 4800 bit/s, saving the power loss of QPCH.


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[Setting Tradeoffs]

None

PWRLEVCFG (Relative Power Level of CCI Modulation Symbol)

[Description]

It sets the transmit power relative to pilot when quick paging channel transmits CCI modulation symbol.

If BTS sets QPCH_SUPPORTED to 1, this recommended value is set based

on Table 2-2.

Table 2-2 Quick paging channel power offset

PWRLEVCFG

PWRLEVPAGE

(binary)

Transmit Power Level

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]


[Range and Units]

0–7 dB

The power offset is -5 dB, so the actual range is -5 to 2 dB.

[Operating Range]

0-7


5, that is, 0 dB

[Setting Tradeoffs]


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Quick paging channel transmit power is the balance between forward link capacity and MS standby time.

If the transmit power of quick paging channel is high, and the forward link capacity is reduced, but the probability of successful detection by MS is high to prolong the MS standby time, and vice versa.

If the sector carrier load is light, the value of this parameter can be larger.

If the forward load is heavy, the value can be smaller.

Out of the consideration of balancing the load and paging success rate, a proper value of the parameter must be set.

PWRLEVPAGE (Relative Power Level of PI Modulation Symbol)

[Description]

It sets the transmit power relative to pilot when quick paging channel transmits PI modulation symbol. If BTS sets QPCHSPT to 1, the recommended value is set based on Table 2-2.

For details, see PWRLEVCFG.

[Type]


[Range and Units]

0–7 dB

The power offset is -5 dB, so the actual range is -5 dB to 2 dB.

[Operating Range]

0-7


7, that is, 2dB

[Setting Tradeoffs]

The value of this parameter is 2 dB to ensure paging success rate, and then reduced based on actual conditions.

If the sector carrier load is light, the value of this parameter can be larger.

If the forward load is heavy, the value can be smaller.

Out of the consideration of balancing the load and paging success rate, a proper value of the parameter must be set.


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Chapter 3 Proposals for Power Control Parameter Settings

3.1 Description of Special Representations

3.1.1 Set value of Reverse Outer Loop

The representations of EbNt set value of reverse outer loop in R01 and R02 are different.

In the R02, the physical meaning of reverse outer loop set value in the database is EbNt, whatever RC. The system converts EbNt as EcIo, and it is set in the CSM5000.

For the EbNt, 0–255 indicates 0–31.875 dB.

EbNt = X × 0.125

For example, if REV_INIT_SETPT is set to 48, it means that EbNt is 6dB. In the RC1, EcIo is -15dB. In the RC3, EcIo is -18.75dB.

In the R01, the physical meaning of set value of reverse outer loop in the database is (EbNt–21 dB), whatever the RCs.

In different RCs, the BSC converts the EbNt as EcIo, and it is set in the CSM5000.

For the (EbNt - 21dB), 0–255 indicates -63.75–0 dB.

EbNt - 21dB= –(255 - X)*0.25

For example, if REV_INIT_SETPT is set to 203, it means EbNt is 8 dB. In the RC1, EcIo is -13 dB. In the RC3, Ec/Io is -16.75 dB.

The relationship between EbNt and EcIo in different RCs is as follows: For the RC1, EcIo = EbNt - 21 For the RC2, EcIo = EbNt - 21 + 1.75 For the RC3, EcIo = EbNt - 21 - 3.75 For the RC4, EcIo = EbNt - 21 - 3.5

The R03 and later borrows the representation in the R02.

3.1.2 Transmit Power of Forward Traffic Channel

The transmit powers of forward traffic channels are represented in the relative gain to the total transmit power of sector carrier, including the transmit power of synchronization channel, paging channel, and forward maximum and minimum traffic channels. The initial transmit power of forward traffic channel is also represented in the relative gain.

In the earlier R03, the range of X is 0 to 255, and that of Y is 0 to 100%, so -(255 – X) × 0.25 =10 LogY.


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Here, X indicates forward channel gain, and Y indicates the ratio of the channel to the entire sector power. 1) Given the channel gain, how to obtain the percentage of received power to total

power of sector If the channel gain is 227, X=227, -(255–227)×0.25= -7dB, and Y = 10–0.7 =19.9%, that is, when the channel gain is 227, the percentage of channel transmit power to the total power of sector is 20%. 2) Given the percentage of received power to total power of sector, how to obtain the

channel gain For example, if the percentage of channel gain to total power of sector is 20%, that is, Y = 0.2, and X = 255 + 4× 10LogY = 227.

The representation and calculation methods in the earlier R03 are shown above.

The representation and calculation methods In the R03 and later are different, but the meanings of parameter are the same.

In the R03 and later, the range of X is -255 to 0, that of Y is 0 to 100%, and X/4 = 10 LogY. Here, X indicates the set value of forward channel gain parameter, and Y indicates the percentage of channel power to the total power of sector.

For example, X= -28, -28/4= -7dB and Y= 10–0.7 = 19.9%, that is, when the channel gain is -28, the percentage of channel transmit power to the total power of sector is 20%.

If the set value in the earlier R03 is A, the set value in the R03 and later is (A – 255).

3.1.3 Eb/Nt Set Value of Forward Fast Power Control

The representation of the parameters of this type is relatively simple, and the value ranges 0 to 255, with the step of 0.125 dB.

Actual value= value of the parameter * Step.

For example, if FOR_MAX_FCH_SET_PT is set to 112, it means the actual value is 112×0.125dB = 14 dB.

3.1.4 Representation of FER

The FER is represented by using the methods specified in the protocols, as shown in Table 3-1.

In the CDMA system, the quality is closely related to capacity.

When other conditions remain unchanged and the quality increases (FER drops), the capacity decreases. If the quality decreases (allowed FER rises), the capacity increases.

When the cell load is heavy, the large capacity is offered at the risk of voice quality (that is, the FER increases), which belongs to the load control.


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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

[Command name]

MOD/LST BSCPWR

PWRSYNSW (TCH Power Synchronization Switch)

[Description]

It controls whether to perform FCH power synchronization.

[Type]

It is an internal BSC algorithm parameter.

[Range and Units]

0 and 1

0—Off and 1---ON

[Operating Range]

0 and 1


0 (Off)

PWRADJTP (TCH Power Synchronization Adjust Type)

[Description]

It means FCH power synchronization adjustment uses absolute or relative value. The relative value, here, is the relative value of At/Ap.

[Type]



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[Range and Units]

0 (relative value) and 1 (absolute value)

[Operating Range]

0 and 1


0 (relative value)

It should not be modified.

STARTVALVE (TCH Power Synchronization Start Valve)

[Description]

If the TCH power synchronization switch is ON, the power is synchronized when the power difference of all branches exceeds the valve in the case of soft handoff.

[Type]


[Range and Units]

0–255, in the unit of 0.25dB

[Operating Range]

None


8


[Setting Tradeoffs]

The greater the value of this parameter, the greater of the valve of power synchronization start is, and the larger the power difference of all branches.

The smaller the value of this parameter, the smaller of the valve of power synchronization start is, and the smaller the power difference of all branches.

STOPVALVE (TCH Power Synchronization Stop Valve)

[Description]

If the FCH power synchronization switch is ON, the power synchronization adjustment continues when the power difference of all branches still exceeds the valve after a power synchronization adjustment because the power difference of all branches exceeds STARTVALVE (TCH Power Synchronization Start Valve) in the case of soft handoff.

If the power difference of all branches is less than the valve of this parameter, the power synchronization adjustment is not required.

[Type]



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[Range and Units]

0–255, in the unit of 0.25 dB

[Operating Range]

4–16 (the value of STOPVALVE should be less than that of STARTVALVE)


4


[Setting Tradeoffs]

The greater the value of this parameter, the easier the power synchronization, and the greater the power difference of all branches.

The smaller the value of this parameter, the harder the power synchronization, and the smaller the power difference of all branches.

CALCUMETHOD (TCH Power Synchronization Calculation Method)

[Description]

It indicates an algorithm used for calculating At/Ap in FCH power synchronization algorithm.

[Type]


[Range and Units] 0: METHOD0 (extreme value mean method) 1: METHOD1 (strongest branch method) 2: METHOD2 (hybrid method) 3: METHOD3 (weighted-average method)

[Operating Range]

0, 1, 2, and 3


0, that is, extreme value average method, which should not be modified

DELAYFRAMES (TCH Power Synchronization Delay Frames)

[Description]

When a power synchronization adjustment is delivered, the reverse frames received within a period neither indicate the power change and nor be used to trigger a new adjustment.

The next adjustment must be performed after a delay. This parameter indicates the delay.

[Type]


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[Range and Units]

3–255, in the unit of frame

[Operating Range]

3–255


3


[Setting Tradeoffs]

This parameter affects power synchronization frequency.

The greater the value of this parameter, the less the power synchronization is.

SCHPWRSYNSW (SCH Power Synchronization Switch)

[Description]

It controls whether to perform SCH power synchronization.

[Type]


[Range and Units]

0 and 1

0—Off and 1---ON

[Operating Range]

0 and 1


0

SCHPWRADJTP (SCH Power Synchronization Adjust Type)

[Description]

It means SCH power synchronization adjustment uses absolute or relative value. The relative value, here, is the relative value of At/Ap.

[Type]


[Range and Units]

0 (relative value) and 1(absolute value)

[Operating Range]


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0 (relative value)


0


SCHCALCUMETHOD (SCH Power Synchronization Calculation Method)

[Description]

It indicates an algorithm used for calculating At/Ap in SCH power synchronization algorithm.

[Type]


[Range and Units]

“3” means METHOD3 (weighted-average method).

For details, see [Range and Units] of CALCUMETHOD (TCH Power Synchronization Calculation Method).

[Operating Range]

3


“3” means weighted-average method, which should not be modified.

SCHSYNPERIOD (SCH Power Synchronization Period)

[Description]

If SCH power synchronization algorithm is started, the power synchronization is performed periodically.

This parameter means SCH power synchronization period, but FCH power synchronization algorithm is performed based on STARTVALVE and STOPVALVE.

[Type]


[Range and Units]


[Operating Range]

3–10


5



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[Setting Tradeoffs]

The smaller the value of this parameter, the more the SCH power synchronization.

If SCH power synchronization is frequent, the power adjustment effect cannot be returned in time to affect the synchronization performance.

REVSCHPWRCTRLSW (Reverse SCH Power Control Switch)

[Description]

It controls whether to perform reverse SCH power synchronization.

[Type]


[Range and Units]

0 and 1

0—Off and 1---ON

[Operating Range]

0 and 1


0 (Off)

3.3 Reverse Closed Loop Power Control Parameters

[Command name]

MOD RCLPC (Base Station Controller Management\Configuration Management\Algorithm Configuration\Modify Reverse Power Control Parameters)

REVPWRSTEP (Reverse Power Control Step)

[Description]

It indicates reverse closed loop power control step.

If an MS receives an UP power control bit on forward power control subchannel, the transmit power of MS increases by one step on the basis of open loop estimated value and closed loop adjustment value.

If MS does not support the operations on reverse supplemental channel or RSCCH, the MS must support1 dB step of power control. Otherwise, the MS must support 0.5 dB and 1 dB step of power control.

If the MS supports 0.25 dB step of power control, the MS also must support 0.5 dB and 1 dB step of power control.

[Type]


2007-7-25


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

[Range and Units]

0–2 indicates 0-1 dB step, 1-0.5 dB step, and 2-0.25 dB step respectively.

[Operating Range]

0–2


1

[Setting Tradeoffs]

If the step is small, the power changes slightly.

If the step is large, the power changes dramatically.

The reverse power control reaches 800 times per second, so the power control speed can reach the requirement.

The smaller the power control step, the more accurate the power control, and the less power is wasted. 0.25 dB step is the most effective on saving system power.

When an MS does not support the power control of a step, and the step of this parameter is small, the MS selects an MS-supported step. For example, if the minimum power control step of MS is 0.5 dB, but the reverse power control step of system is 0.25 dB, the MS automatically sets the power control step to 0.5 dB.

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

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

[Description]

They indicate R-TCH power adjust gains relative to ACH, enhanced ACH, and reverse universal control channel.

As shown in the following formula, after the MS accesses a system over the ACH, initial power of traffic channel = current ACH power + the 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 service and data service separately.

[Type]

It is an Um interface parameter (ECAM), used by MS.

[Range and Units]


2007-7-25


-8–7, in the unit of dB

[Operating Range]

0–6


0

[Setting Tradeoffs]

A high value of this parameter helps improve transmission quality at the early stage of a call, as well as call setup success rate, but the system capacity is affected and the MS consumes more powers.

RLGAINSCHPLT1X (1X R-SCH Gain Offset Relative to R-PICH)






[Description]

They indicate R-SCH power offsets relative to R-PICH, and sent to MS through the ESCAM.

The value of this parameter is part of R-PICH and R-SCH power, 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]

It is an Um interface parameter (ESCAM), used by the MS.

[Range and Units]



2007-7-25


[Operating Range]

0–22


Table 3-2 describes the recommended values.

The recommended value “8” means 1 dB.

Table 3-2 Recommended values

Rate Recommended value

1x 8

2x 12

4x 16

8x 18

16x 20

32x 22

[Setting Tradeoffs]

A high value of this parameter helps improve R-SCH transmission efficiency but affects the reverse capacity. The higher the SCH rate, the larger the required power is.

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]

They are used in the reverse inner loop power control of IS-2000.

The BTS converts the TCH Eb/Nt of target SetPoint from the BSC on the TCH into Ec/Io on the R-PICH, and compares with received Ec/Io on the R_PICH to determine reverse power control bit.

The parameters are sent at Abis interface or A3 interface and delivered to BTS by the BSC.

[Type]

It is an Abis interface and A3 interface parameter, used by the BTS.

[Range and Units]


[Operating Range]

-255–0


0


2007-7-25


[Setting Tradeoffs]

None

VFCHREVINIT (Voice Service Reverse Initial Set Value for FCH)

DFCHREVINIT (Data Service Reverse Initial Set Value for FCH)

[Description]

In different RCs, the different initial Eb/Nt corresponds to different Ec/Io. After setting the Eb/Nt, the system automatically converts the Eb/Nt into Ec/Io, and the values are set in the BTS.

The value of this parameter is appropriate if it does not cause an excessive overshoot.


[Type]


[Range and Units]


[Operating Range]

(REV_MIN_FCH_SET_PT + 3dB)– REV_MAX_FCH_SET_PT – 1 dB)


If the recommended value is 48, whatever RCs, initial Eb/Nt =6dB.

[Setting Tradeoffs]

If the value of this parameter is too great, the revere outer loop power control starts at a high power level.

If the value of this parameter is too small, the Eb/Nt increases through reverse outer loop power control. In this case, the received FER cannot reach the target FER.

The value affects the time when Eb/Nt is adjusted to a proper value.

If the value of this parameter is set to a proper value, Eb/Nt can be adjusted to the required value quickly. The network performance meets the need of specified FER, without power waste.

If the value of this parameter is too small, the FER of the network cannot reach specified FER (such as 1%) at the beginning.

If the value of this parameter is too great, the power wastes at the beginning.

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

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

[Description]

They indicate the maximum set values of R-FCH Eb/Nt.


2007-7-25



[Type]


[Range and Units]


[Operating Range]

48–96


If the recommended value is 96, whatever the RCs, maximum set value of outer loop R-FCH Eb/Nt =12 dB.

[Setting Tradeoffs]

If the value of this parameter is too great, the conversation quality can be secured even when the radio environments are bad, but the reverse capacity is reduced.

If the value of this parameter is too small, the calls may be dropped in the case of fading, such as a corner.

In the case of large interference, the value of this parameter increases to secure the conversation quality and decrease the call drops.

The maximum transmit power of MS is limited, so the function is limited.

VMINFCH (Voice Service Min. Value of FCH Outer Loop)

DMINFCH (Data Service Min. Value of FCH Outer Loop)

[Description]

They are reverse closed loop power control parameters and indicate the minimum set values of the R-FCH Eb/Nt.


[Type]


[Range and Units]


[Operating Range]

8–32


If the recommended value of VMINFCH is 16, the minimum set value Eb/Nt of outer loop is 2 dB.

The recommended value of DMINFCH is 32.

[Setting Tradeoffs]


2007-7-25


If the value of this parameter is too great and reverse SNR Eb/Nt is higher than actual value, reverse power wastes and reverse capacity is affected largely.

If the value of this parameter is too small, reverse outer loop algorithm can be adjusted largely.

If the power control performance is better, the voice quality can be secured and reverse capacity improves.

If the value of this parameter is too small, the set value may drop largely, and the fading cannot be compensated in time to affect the voice quality.

REVMAXDCCH (Maximum Set Value of DCCH Outer Loop)

[Description]

See [Description] of REVMAXFCH (Maximum Set Value of FCH Outer Loop).

REVMINDCCH (Minimum Set Value of DCCH Outer Loop)

[Description]

See [Description] of REVMINFCH (Minimum Set Value of FCH Outer Loop).

REVMAXSCH (Maximum Set Value of SCH Outer Loop)

[Description]

It means the maximum set value of R-SCH closed loop power control (or outer loop relative to FCH) Eb/Nt.

[Type]


[Range and Units]


[Operating Range]

48–96


If the recommended value is 96, the maximum set value of outer loop Eb/Nt =12 dB, whatever rates.

[Setting Tradeoffs]

If the value of this parameter is too great, the data transmission quality can be ensured, even when the radio environments are bad, but the reverse capacity of system is reduced.

If the value of this parameter is too small, too many bad frames are received, affecting the transmission of data service.


2007-7-25


In the case of large interference, the value of this parameter increases to secure the transmission quality. The maximum transmit power of MS is limited, so the function is limited.

REVMINSCH (Minimum Set Value of SCH Outer Loop)

[Description]

It means the minimum set value of R-SCH closed loop control power (or outer loop relative to FCH) Eb/Nt.

[Type]


[Range and Units]


[Operating Range]

8–32


If the recommended value is 32, the minimum set value of outer loop Eb/Nt= 4 dB, whatever rates.

[Setting Tradeoffs]

If the value of this parameter is too great, the reverse SNR Eb/Nt is higher than required value, the reverse power wastes, and the reverse capacity is affected largely.

If the value of this parameter is too small, R-SCH outer loop algorithm can be adjusted largely.

If the power control performance is better, the transmission quality of data service can be secured and reverse capacity improves.

FCHPWRCFRQ (Reverse Outer Loop Power Control Period for FCH)

DCCHPWRCFRQ (Reverse Outer Loop Power Control Period for DCCH)

[Description]

The values of the parameters determine the reverse outer loop power control period.

If FCHPWRCFRQ (Reverse Outer Loop Power Control Period for FCH) good frames are received, decrease by FCHENDWNSTEP (Eb/Nt Down Step for FCH)).

They are a group of parameters of reverse outer loop, but the algorithm convergence must be considered when they are modified.

[Type]


[Range and Units]


2007-7-25



[Operating Range]

0-255


33

[Setting Tradeoffs]

If the value of this parameter is large, the period is long, and the power control is smooth.

If the value of this parameter is small, the period is short, and the power changes largely.

FCHENDWNSTEP (Eb/Nt Down Step for FCH)

[Description]

It indicates the down step for the R-FCH outer loop power control after FCHPWRCFRQ (reverse outer loop control power for FCH) good frames are received.

[Type]


[Range and Units]


[Operating Range]

0–255


1, that is, 0.125 dB

[Setting Tradeoffs]

If the value of this parameter is small, the power changes slightly and the overshoot is small. If the value of this parameter is large, the power changes largely, and the overshoot is large.

The value of this parameter is 1 to ensure a high accuracy of power control accuracy.

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

[Description]

It indicates the maximum adjustment step for the R-FCH outer loop power control, and means the maximum limitation amplitude of calculated value after UP step of set value based on reverse outer loop algorithm.

For details, see FCHPWRCFRQ (Reverse Outer Loop Power Control Period for FCH).

[Type]



2007-7-25


[Range and Units]


[Operating Range]

5–10



[Setting Tradeoffs]

This parameter aims to restrict adjustment step for outer loop power control.

If the value of this parameter is too small, the expected adjustment is restricted and the normal power control performance is unavailable.

LINKRPTFREQ (Power Control Report Granularity)

[Description]

It indicates the report granularity used to control the reverse link reports.

[Type]


[Range and Units]

10–255, in the unit of 100ms

[Operating Range]

10–50


20


[Setting Tradeoffs]

None

SCHPWRCFRQ (Reverse Outer Loop Power Control Period for SCH)

[Description]

It controls the outer loop power control period for R-SCH or R-SCH closed loop, because R-SCH closed loop has no obvious outer loop.

If SCHPWRCFRQ (Reverse Outer Loop Power Control Period for SCH) good frames are received, decrease by SCHENDWNSTEP (Reverse Outer Loop Eb/Nt Down Step for SCH).

When the group of R-SCH closed loop power control parameters is modified, the algorithm convergence must be considered, which is similar to that of FCH outer loop.

[Type]


2007-7-25



[Range and Units]


[Operating Range]

0-255


19

[Setting Tradeoffs]

If the value of this parameter is too great, the adjustment period is long and the power changes slightly.

If the value of this parameter is too small, the adjustment period is short and the power changes largely.

SCHENDWNSTEP (Reverse Outer Loop Eb/Nt Down Step for SCH)

[Description]

It indicates the Eb/Nt Down step after there are SCHPWRCFRQ good frames.

[Type]


[Range and Units]


[Operating Range]

0–255



[Setting Tradeoffs]

If the value of this parameter is small, the power changes slightly and the overshoot is small.

If the value of this parameter is large, the power changes largely and the overshoot is large.

The value of this parameter is 1 to ensure a high accuracy of power control accuracy.

SCHENMAXSTEP (Reverse Outer Loop Eb/Nt Max. Up Adjustment Step for SCH)

[Description]

It indicates the maximum adjustment step for reverse FCH outer loop power control and means the maximum amplitude limitation after the Up step of the set value is calculated based on reverse SCH closed loop power control algorithm.


2007-7-25


[Type]


[Range and Units]


[Operating Range]

5–10



[Setting Tradeoffs]

The value of this parameter is to control the adjustment value of outer loop.

If the value is too small, the normal power control performance fails. Therefore, the value of this parameter cannot be too small.

RCAGFAC (RCAG Adjustment Control Factor for SCH)

[Description]

It indicates the ratio of actual RCAG to calculated RCAG adjustment.

Setting the value of this parameter to 1 means that the actual RCAG is equal to calculated RCAG, that is, the calculated RCAG is used for the adjustment.

[Type]


[Range and Units]

0–255

[Operating Range]

0–1


1


ILOOPTHRS (Inner Loop Power Control Threshold for SCH)

[Description]

It indicates a threshold used for whether to adjusting the RCAG.

Adjusting the RCAG aims to the Eb/Nt value of SCH estimated by the BSC is approximate to set value of Eb/Nt.

When the difference between the Eb/Nt set value of SCH estimated by the BSC and the set value of Eb/Nt is greater than the parameter, the RCAG must be adjusted.


2007-7-25


[Type]


[Range and Units]


[Operating Range]

0–8


4, that is, 0.5 dB

It should not modified.

ILOOPINTERVAL (Inner Loop Power Control Interval for SCH)

[Description]

It indicates the minimum time interval at which two continuous PCMs are sent.

The RCAG is sent to the MS through the PCM, that is, the minimum time interval at which two continuous RCAGs are adjusted.

[Type]


[Range and Units]


[Operating Range]

0–255


20


[Setting Tradeoffs]

If the time interval is too short, the signaling loads on the FCH are too heavy.

If the interval is too long, the power control rate is too slow.

EB/NTVALTIME (Eb/Nt Extension Time for SCH)

[Description]

It indicates whether the SCH required by two continuous Data Brusts to borrow the interval of Eb/Nt set value.

Because the MS applies for reverse SCH, if the difference between the start time of the second Data Burst and the end time of the first Data Burst is less than the parameter, the


2007-7-25


Eb/Nt set value of the second Data Burst borrows the final Eb/Nt value of the first Data Burst.

[Type]


[Range and Units]


[Operating Range]

0–255


20


EB/NTVALTIME (Eb/Nt Extension Time for SCH)

[Description]

It indicates whether the SCH required by two continuous Data Brusts to borrow the interval of Eb/Nt set value.

Because the MS applies for reverse SCH, if the difference between the start time of the second Data Burst and the end time of the first Data Burst is less than the parameter, the Eb/Nt set value of the second Data Burst borrows the final Eb/Nt value of the first Data Burst.

[Type]


[Range and Units]


[Operating Range]

0–255


20


MAXRCAG (Max. RCAG Value)

[Description]

It indicates the max. value of RCAG of R-SCH outer loop power control.

When the MS transmits the TCHs in RC3, RC4, RC5 and RC6, the code channel transmit powers are:

mean code channel output power (dBm) =


2007-7-25


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

here, “mean pilot channel output power” means the output power of R-PICH, and reverse closed loop power control adjusts the transmit power of R-PICH. Transmit power of SCH and FCH= R-PICH power + offset, and it is determined based on many parameters as follows:

RLGAIN_TRAFFIC_PILOTs is effective on R-FCH, R-SCH and R-DCCH. It can be delivered to the MS through the ESPM.

RLGAIN_SCH_PILOT is effective on R-SCH only, and can be delivered through the ESCAM.

Nominal_Attribute_Gain: The MS needs to remain the Nominal_Attribute_Gain table to reflect the power offset of R-SCH, R-FCH, or R-DCCH relative to R-PICH.

Attribute_Adjustment_Gain: The MS needs to remain the Attribute_Adjustment_Gain table, including the data rates, frame length, code rate, and power gain relative to R-PICH. The MS initializes the parameter as 0.

Reverse_Channel_Adjustment_Gain (RCAG) is similar to Attribute_Adjustment_Gain.

Multiple_Channel_Adjustment_Gain (MCAG): If the MS transmits two or more code channels, besides R-PICH, the MS needs to set the parameter based on the protocols, otherwise, the MS initializes the parameter as 0. The MCAG can decrease the transmit power of R-FCH when the MS transmits R-SCH, and the FER of R-FCH increases.

If the MS transmits two or more code channels besides R-PICH, the MS sets Multiple_Channel_ Adjustment_Gain [Channel] respectively for each channel like the following: 1) Label the Max_Channel as the code channel with the highest Pilot_Reference_Level

value of all the code channels. The Pilot_Reference_Level values can be queried in the protocols.

2) Set Multiple_Channel_Adjustment_Gain[Max_Channel] to 0. 3) For other channels,

Multiple_Channel_Adjustment_Gain[Channel]=Pilot_Reference_Level[Max_Channel] - Pilot_Reference_Level[Channel]

Variable_Supplemental_Adjustment_Gain: When the MS uses the variable rates on the R-SCH, the MS sets the parameter based on the protocols, otherwise, the MS sets this parameter to 0.

IFHHO_SRCH_CORR is a correction value in the case of inter-frequency hard handoff.

In the traffic state, Nominal_Attribute_Gain and Reverse_Channel_Adjustment_ Gain can be used to modify dynamically power offset of R-SCH relative to R-PICH to realize the R-SCH power control.


2007-7-25


In the PCM, the value range of parameter related to Nominal_Attribute_Gain is inconsistent with that of MS, so the Reverse_Channel_Adjustment_Gain rather than Nominal_Attribute_Gain is used for SCH power control.

[Type]


[Range and Units]


[Operating Range]

-48–48


48


MINRCAG (Minimum RCAG Value)

[Description]

It indicates the minimum value of RCAG of R-SCH outer loop power control. For details, see MAXRCAG (Max. RCAG Value).

[Type]


[Range and Units]


[Operating Range]

-48–48


-8


MAXRCAGADJSTEP (Max. RCAG Adjust Step)

[Description]

It indicates the maximum adjustment step of RCAG for R-SCH outer loop power control.

[Type]


[Range and Units]


[Operating Range]


2007-7-25


0–96


8


3.4 Forward Slow Power Control Parameters

[Command name]

MOD FSLOWPC (Base Station Controller Management\Configuration Management\Algorithm Configuration\Modify Forward Slow Power Control Parameters)

FWDMAXCHGAIN (Maximum Transmit Power of Forward Channel)

[Description]

It indicates the max. Tx power of forward channel in the measurement report power control. Adjusting this parameter helps balance capacity and quality, so this parameter is determined as required.

[Type]


[Range and Units]

–255-0, in the unit of 0.25 dB

For details, see 3.1.3 .

[Operating Range]

(PICH gain - 6dB) – PICH gain


The recommended value equals to PICH gain. That is, if the PICH gain is -28, the recommended value is -28.

[Setting Tradeoffs]

This parameter controls the max. transmit power of forward channel, and prevents single TCH from seizing too many forward powers because of power control.

If the value of this parameter is too great, the voice quality is still OK, but the forward capacity is reduced in bad radio environments.

If the value of this parameter is too small, the voice quality is reduced sharply, and even the calls may be dropped, but the forward capacity is relatively large in bad radio environments.

FWDMINCHGAIN (Minimum Transmit Power of Forward Channel)


2007-7-25


[Description]

It indicates the mini. Tx power of forward channel in the measurement port power control.

[Type]


[Range and Units]



[Operating Range]

(PICH gain- 13 dB)– (PICH gain – 9 dB)


(PICH gain – 9 dB) means (PLTCHPWRGAIN - 36), that is, if the PICH gain is -28, this recommended value of this parameter is -64 (recommended value by Qualcomm).

In actual network, the value of this parameter can decrease to improve the system capacity and call drop rate is also normal.

[Setting Tradeoffs]

If the value of this parameter is too great, the voice quality is improved slightly but the forward capacity is reduced in good radio environments.

If the value of this parameter is reduced, the voice quality changes slightly, but the forward capacity is improved in good radio environments. The power however can increase quickly when the radio environments are bad.

FWDINITCHGAIN (Forward Channel Initial Transmit Power)

[Description]

It indicates the initial transmit power of forward channel in the measurement report power control.

During the capacity test, the forward initial transmit power can be small to ensure the capacity. For example, if the capacity is tested in good radio environments, the value of this parameter can be reduced sharply to -68 (the PICH gain is -28), but the calls can be connected.

[Type]


[Range and Units]



[Operating Range]

(FWDMAXCHGAIN- 3 dB) – FWDMAXCHGAIN


2007-7-25


The value of FWDMAXCHGAIN is affected by the PICH gain.


The recommended value = PICH gain – 7 dB (PLTCHPWGAIN- 28), that is, if the PICH gain is -28, the recommended value is -56.

[Setting Tradeoffs]

The initial Tx. power must be smaller than the max. Tx power to ensure the voice quality of calls at early stage.

If the forward radio environments are good and FER is relatively low, the forward power can be reduced sharply.

THRSPWRDWN (Power Decrease Step)

[Description]

It specifies power down step of each slow power control when the HTMeasureRpt timer expires.

The smaller the step, the less the probability of call drop caused by power decrease is.

[Type]


[Range and Units]


[Operating Range]

0–255


2, that is, 0.5 dB

[Setting Tradeoffs]

If the value of this parameter is too great, the calls may be dropped because the power decreases sharply.

If the value of this parameter is too small, the power changes slightly and the calls may not be dropped easily, but the powers may be wasted.

PWRRPTTHRS (Power Control Reporting Threshold)

[Description]

The MS reports the power measurement report message (PMRM) when the number of received bad frames reaches the value of this parameter.

A binding relationship exists between this parameter and forward target FER. If the forward target FER is modified, this parameter is also modified automatically in the database. For details, see ESTARVBADFRM.


2007-7-25


[Type]

It is an Um interface parameter (SPM), used by the MS.

[Range and Units]


[Operating Range]

0–31


2


[Setting Tradeoffs]

If the value of this parameter is too great, the radio fading cannot be reflected quickly to cause the power control delay in the mode of valve measurement report power control. If the value of this parameter is too small, the measurement report is reported frequently and the too much signaling affects the voice quality.

If the period is 1, the MS reports a PMRM when receiving a bad frame. If the target FER is 1%, it is normal if one bad frame of 100 frames is received. If the value of this parameter is 1, mistaking bad frames as the need for power Up cannot help reach the better power control performance.

PWRRTPFRMNUM (Power Control Reporting Frame Count)

[Description]

It determines the measurement report period Z. Z = 5×2^(PWRRPTFRMNUM/2) frames. In the period measurement report power control, a PMRM is reported within Z frames.

In the valve measurement power control, the bad frames measured once within Z frames. If the total number of bad frames within the Z frames does not meet the value of PWRRPTTHRS, the bad frames are measured within the next Z frames.

If the number of bad frames reaches the value of PWRRPTHRS before the period of Z frames ends, a PMRM is reported, and a new period of Z frames starts.

[Type]


[Range and Units]


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:FRAME640,15:FRAME905.

[Operating Range]

0–15

The value range is listed in the drop-down menu.


2007-7-25



9, that is, 113 frames


[Setting Tradeoffs]

In the mode of valve measurement report power control, this value is used as a measurement period only. If the value is large, the measurement times can be reduced, and the total number of frames is small because of the period separation and calculated bad frames are greater than received bad frames.

In the period measurement report power control, this value is set according to target FER and PWRRPTTHRS. For example, if the target FER is 1 and the value of PWRRPTTHRS is 2, the period must be about 200 frames. According to the formula, the value of this parameter is 11 (corresponding to 226 frames). Usually, the period measurement report power control is not used.

PWRTHRSENABLE (Threshold Reporting Mode Indication)

[Description]

It controls whether measurement report power control parameters select the mode of valve power control. Generally, the valve power control mode is used.

[Type]


[Range and Units]

0 and 1

0—Off and 1--ON

[Operating Range]

0 and 1


1


[Setting Tradeoffs]

None

PWRPERIODENABLE (Period Reporting Mode Identification)

[Description]

It controls whether measurement report power control parameters select the mode of period power control.

[Type]


[Range and Units]


2007-7-25


0 and 1

0—Off and 1---ON

[Operating Range]

0 and 1


0


[Setting Tradeoffs]

None

PWRRPTDELAY (Power Report Delay)

[Description]

After a PMRM is reported, the MS re-measure the number of frames within next period after short time.

The value of this parameter determines the next period after the MS waits for how many frames. Therefore, this parameter is set aiming to measure the number of forward frames after the forward power control triggered by the last PMRM takes effect.

[Type]


[Range and Units]

0–31, in the unit of 4 frames

[Operating Range]

1–2


1

[Setting Tradeoffs]

The greater the value of this parameter, the more the missing error frames. Therefore, the minimum value of this parameter is 1, that is, at an interval of four frames.

WAITMSPCTMR (Wait MS Report Power Control Measurement Report Timer)

[Description]

In the valve mode, if the power measurement report is not received within the timer length, forward Tx power of existing traffic channel is reduced. The timer length parameter is set in the TIMER table.

[Type]

It is an internal BSC algorithm parameter, used in the power control module of SPU.

[Range and Units]


2007-7-25


0-255, in the unit of 1s

[Operating Range]

0-255

[Setting Tradeoffs]

2, that is, 2 seconds

[Setting Tradeoffs]

The shorter the value of this parameter, the faster the power control speed is. In this case, the power control mean square error increases.

The longer the value, the slower the power control speed is. In this case, the call may be dropped and power may be wasted.

FSCHFERRPT (FSCH FER Report Indication)

[Description]

It specifies whether to report indication value of the F-SCH bad frame message.

If the value of this parameter is 1, the MS records the number of total frames and bad frames on the F-SCH.

When a Burst ends, the SCH frame message is reported through a PMRM and the counter is set to 0.

If the value of this parameter is 0, the MS does not report the SCH frame message.

[Type]

It is an Um interface parameter (ESCAM), used by MS.

[Range and Units]

0 and 1

0—Off and 1---ON

[Operating Range]

0 and 1


0

[Setting Tradeoffs]

None

3.5 Forward EIB Power Control Parameters

[Command name]

MOD FEIBPC (Base Station Controller Management\Configuration Management\Algorithm Configuration\Modify Forward EIB Power Control Parameters)


2007-7-25


FWDCHMAXGAIN (F-TCH Max. Transmit Power)

[Description]

It indicates the max. Tx power of forward channel in the EIB power control.

Adjusting this parameter helps balance the capacity and quality, so this parameter is determined as required.

[Type]

It is an internal BSC algorithm parameter, used by the power control module of FMR.

[Range and Units]



[Operating Range]

(PICH gain – 4 dB) – PICH gain


(PICH gain – 3 db) means (PLTCHPWRGAIN - 12), that is, if the PICH gain is -28, the recommended value of this parameter is -40. Qualcomm recommends a value (PICH gain – 1 dB) of this parameter.

[Setting Tradeoffs]

This parameter controls the max. transmit power of forward channel and prevents single TCH from seizing too many forward powers because of power control.

If the value of this parameter is too great, the voice quality is still OK, but the forward capacity is reduced in bad radio environments.

If the value of this parameter is too small, the voice quality is reduced sharply, and even the calls are dropped, but the forward capacity is relatively large in bad radio environments.

FWDCHMINGAIN (F-TCH Mini. Transmit Power)

It indicates the mini. Tx power of forward channel in the EIB power control.

[Type]


[Range and Units]



[Operating Range]




2007-7-25


(PICH gain – 9 dB) means (PLTCHPWRGAIN - 36), that is, if the PICH gain is -28, this recommended value of this parameter is -64. Qualcomm recommends a value (PICH gain – 15 dB), that is -88.

[Setting Tradeoffs]

If the value of this parameter is too great, the voice quality is improved slightly, but the forward capacity is reduced in good radio environments. If the value of this parameter is reduced, the voice quality changes slightly, but the forward capacity is improved in good radio environments. The power however can increase quickly when radio environments are bad.

EIBTCNT (Timer Length after Bad Frame Received)

[Description]

It indicates the timer length after bad frames are received.

If the MS receives bad frames again within the timer length, the forward power of BTS is not changed. If the MS receives good frames within the timer length, the forward power decreases by EIB_DWNB_STEP.

[Type]


[Range and Units]


[Operating Range]

0–255


3


[Setting Tradeoffs]

When EIB algorithm parameters are modified, the algorithm convergence must be considered. The convergence means that if the received FER on the radio link reaches the target FER, power Up and power Down are contradicted within an EIB power control period. If the target FER is 1%, that is, there is one bad frame and 99 good frames, the power can be balanced after the power Up once and power Down of other 99 frames.

EIBUPSTEP (Power Up after Bad Frame Received)

[Description]

It indicates the EIB power up step when the MS receives one bad frame following many good frames.

[Type]


[Range and Units]


2007-7-25



[Operating Range]

0–255


8, that is, 2 dB


[Setting Tradeoffs]

If EIB algorithm parameters are modified, the algorithm convergence must be considered. If the value of this parameter is too great, the fading can be compensated quickly, but some powers are wasted. If the value of this parameter is too small, the transmit power can be saved, but the voice quality decreases.

EIBDWNSTPS (Power Down after good Frame Received with Timer Set to 0)

[Description]

It indicates the power down step after good frames are received. The number of good frames received meets the power down period calculated based on FER and power Up step.

[Type]

It is an internal algorithm parameter used by the power control module of FMR.

[Range and Units]


[Operating Range]

0–255


1, that is, 0.25 dB


[Setting Tradeoffs]

When EIB algorithm parameters are modified, the algorithm convergence must be considered. The value of this parameter is generally set to 1.

If the value of this parameter is larger than 1, the power control is not very perfect.

EIBDWNSTPB (Power Down Good Frame Received with Timer)

[Description]

It indicates the power down step when a good frame is received within PWR_EIB_CNT after bad frames are received.

[Type]


2007-7-25


It is an internal algorithm parameter, used by power control module of FMR.

[Range and Units]


[Operating Range]

0–255


2, that is, 0.5 dB


[Setting Tradeoffs]

When part of EIB algorithm parameters is modified, the algorithm convergence and the number of parameters to be modified must be considered.

3.6 Forward Fast Power Control Parameters

[Command name]

MOD FFASTPC (Base Station Controller Management\Configuration Management\Algorithm Configuration\Modify Forward Fast Power Control parameters)

FPWRSTEP (Forward Power Control Step)

[Description]

It indicates the value of power-up and power-down when one power control bit is received.

[Type]

It is an A3 interface and Abis interface parameter, used by the BTS.

[Range and Units]


[Operating Range]

1–2


2, that is, 0.5 dB

[Setting Tradeoffs]

If the value of this parameter is too great, the forward transmit power is wasted. If the value of this parameter is too small, the power changes slowly and the fading cannot be compensated quickly.


2007-7-25


IS95SCHGAIN1 (IS95 Forward Power Control Subchannel Gain 1)

[Description]

It indicates power control gain 1 of forward power control subchannel relative to F-TCH for the single branch, as for the IS95 MSs.

The forward power control subchannel is composed of partial power control bits from F-FCH or F-DCCH, and is part of F-TCH.

In the case of single branch, they require the same powers. In the soft handoff state, service frames are the maximum multipath energy ratio combination for the MS, but the power control subchannel gain must be demodulated separately on respective branch.

When a branch indicates power Down, the MS decreases the power. When all the branches indicate power up, the MS increase the power. At that time, the power of power control subchannel must be higher than Tx power of TCH.

[Type]

It is an A3 interface and Abis interface parameter, used by the BTS and also an Um interface parameter (CAM), used by the MS.

[Range and Units]


[Operating Range]

0–127


0, that is, 0 dB

[Setting Tradeoffs]

If there are no soft handoff branches, the forward power control subchannel is consistent with F-TCH.


[Description]

It indicates power control subchannel gain 2 for two branches as for IS95 MSs, and the relationship between the transmit power of forward power control subchannel and that of TCH. For details, see IS95SCHGAIN1.

[Type]

It is an A3 interface and Abis interface parameter used by the BTS and also an Um interface parameter (CAM) used by the MS.

[Range and Units]

0–127, in the case of 0.25 dB

[Operating Range]

0–127



2007-7-25


12, that is, 3 dB

[Setting Tradeoffs]

None


[Description]

It indicates power control subchannel gain 3 for three or more branches as for IS95 MSs and the relationship between the transmit power of forward power control subchannel and that of TCH. For details, see IS95SCHGAIN1.

[Type]

It is an A3 interface and Abis interface parameter used by the BTS and also an Um interface parameter (CAM) used by the MS.

[Range and Units]

0–127, in the case of 0.25 dB

[Operating Range]

0–127



[Setting Tradeoffs]

None


[Description]

It indicates the power control subchannel gain 1 for single branch as for IS2000 MSs. For details, see IS95SCHGAIN1.

In addition, the value of IS95SCHGAIN1 is less than that of IS2000SCHGAIN1, because the forward TCH power of IS2000 is smaller than that of IS95, so the subchannel gain of IS2000 must be larger to ensure correct reverse power control bits.

[Type]

It is an A3 interface and Abis interface parameter used by the BTS and also an Um interface parameter (ECAM) used by the MS.

[Range and Units]


[Operating Range]

0–31



2007-7-25


12, that is, 3 dB

[Setting Tradeoffs]

None


[Description]

It indicates the power control subchannl gain 2 for two branches as for IS2000 MSs, and the relationship between the transmit power of forward power control subchannel and that of TCH. For details, see IS95CSHGAIN1.

[Type]

It is an A3 interface and Abis interface parameter used by the BTS and an Um interface parameter (ECAM) used by the MS.

[Range and Units]


[Operating Range]

0–31


24, that is, 6 dB

[Setting Tradeoffs]

None


[Description]

It indicates the power control subchannel gain 3 for three or more branches as for IS2000 MSs, and the relationship between transmit power of forward power control subchannel and that of TCH. For details, see IS95SCHGAIN1.

[Type]

It is an A3 interface and Abis interface parameter used by the BTS and also an Um interface parameter (ECAM) used by the MS.

[Range and Units]


[Operating Range]

0–31



[Setting Tradeoffs]


2007-7-25


None

VINITFCH (Voice Service FCH Initial Eb/Nt Value)

DINITFCH (Data Service FCH Initial Eb/Nt Value)

[Description]

They indicate the F-FCH initial Eb/Nt set values of the FCH forward outer loop power control. The principle of forward outer loop power control is similar to that of reverse outer loop power control. For details, see VFCHREVINIT (Voice Service Reverse Initial Set Value for FCH).


[Type]

It is an Um interface parameter (ECAM) used by the MS.

[Range and Units]


[Operating Range]

0–255


40, that is, 5 dB

[Setting Tradeoffs]

None

VMAXFCH (Voice Service FCH Max. Eb/Nt Value)

DMAXFCH (Data Service FCH Max. Eb/Nt Value)

[Description]

They indicate the permitted maximum Eb/Nt values of the FCH forward outer loop power control. They are set based on voice service and data service separately.

[Type]


[Range and Units]


[Operating Range]

48–80


80, that is, 10 dB

In the earlier R002B03D006, the value is set to 114.


2007-7-25


[Setting Tradeoffs]

If the value of this parameter is too great, the communication quality can be ensured in bad radio environments, but the power control overshoot is too great and the forward capacity is affected.

If the value of the parameter is too small, the voice quality is affected dramatically in bad radio environments and even the calls may be dropped.

VMINFCH (Voice Service FCH Min. Eb/Nt Value)

DMINFCH (Data Service FCH Min. Eb/Nt Value)

[Description]

They indicate the permitted minimum Eb/Nt set values of the FCH forward outer loop power control. They are set separately based on voice service and data service.

For details, see VMAXFCH (Voice Service FCH Max. Eb/Nt Value) and DMAXFCH (Data Service FCH Max. Eb/Nt Value).

[Type]


[Range and Units]


[Operating Range]

16–24


16, that is, 2 dB

[Setting Tradeoffs]

If the value of this parameter is large, the voice quality cannot be improved largely even in good radio environments, but the capacity is affected.

INITDCCH (DCCH Initial Eb/Nt Value)

MAXDCCH (DCCH Max. Eb/Nt Value)

MINDCCH (DCCH Min. Eb/Nt Value)

[Description]

For details, see INITFCH (FCH Initial Eb/Nt Value), MAXFCH (FCH Max. Eb/Nt Value) and MINFCH (FCH Max. Eb/Nt Value).

FWDSCHINIT1X (1X F-SCH Initial Eb/Nt Offset Relative to FCH)

FWDSCHINIT2X (2X F-SCH Initial Eb/Nt Offset Relative to FCH)


2007-7-25


FWDSCHINIT 4X (4X F-SCH Initial Eb/Nt Offset Relative to FCH)




[Description]

They calculate the initial Eb/Nt values of forward SCH outer loop power control in the MS.

Initial Eb/Nt value= Eb/Nt set value of FCH outer loop power control + the value of corresponding parameter, that is, the initial EB/Nt value of SCH is an relative value.

In this case, according to actual condition of FCH links, correct initial Eb/Nt set values of SCH can be obtained to optimize quickly the Eb/Nt set values of SCH outer loop.

[Type]


[Range and Units]

-128 – 127, in the unit of 0.125 dB

[Operating Range]

-128 – 127


24, that is 3 dB

[Setting Tradeoffs]

None

FWDMAXSCH1X (1x F-SCH Max. Eb/Nt Value)

FWDMAXSCH 2X (2 x F-SCH Max. Eb/Nt Value)





[Description]

For details, see FWDMAXFCH.

[Type]


[Range and Units]


[Operating Range]


2007-7-25


0–255


Table 3-3 describes the recommended values.



1x 80

2x 80

4x 80

8x 88

16x 96

32x 96

[Setting Tradeoffs]

None

FWDMINSCH 1X (1x F-SCH Min. Eb/Nt Value)

FWDMINSCH 2X(2 x F-SCH Min. Eb/Nt Value)





[Description]

For details, see FWDMINFCH.

[Type]


[Range and Units]


[Operating Range]

0–255


16, that is, 2 dB

[Setting Tradeoffs]

None


2007-7-25


VFCHINITGAINFIX (Voice Service Forward FCH Initial Power Correction Value)

DFCHINITGAINFIX (Data Service Forward FCH Initial Power Correction Value)

[Description]

They indicates the correction values of initial Tx power calculated for forward FCH and are set separately based on voice service and data service.

[Type]


[Range and Units]


[Operating Range]

0–16


16

[Setting Tradeoffs]

If the value of this parameter is too great, the call quality at the early state can be ensured, but the initial power must be less than the maximum power.

VFCHMAXGAINR1 (Forward Voice Service FCH Max. Gain 1)

DFCHMAXGAINR1 (Forward Data Service FCH Max. Gain 1)

[Description]

They specify the maximum gain 1 of the forward FCH with two branches when the call is not in the soft handoff state, and are set separately based on voice service and data service.

[Type]

It is an A3 interface and Abis interface parameter used by the BTS.

[Range and Units]


[Operating Range]



PICH gain – 3 dB, that is, PICH gain is -28, the recommended value is -40.

According to the Qualcomm recommendations, PICH gain – 4 dB, that is, PICH is -28, the recommended value is -44.

[Setting Tradeoffs]


2007-7-25


If the value of this parameter is too great, the voice quality can be ensured in bad radio environments, but the forward capacity is affected.

If the value of this parameter is too small, the voice quality is affected largely and even the calls are dropped in bad radio environment.

VFCHMINGAINR1 (Voice Service FCH Min. Gain 1)

DFCHMINGAINR1 (Data Service FCH Min. Gain 1)

[Description]

They specify the minimum gain 1 of the forward FCH with two branches when the call is not in the soft handoff state, and are set separately based on voice service and data service.

[Type]

It is an A3 interface and Abist interface parameter used by the BTS.

[Range and Units]



[Operating Range]

(PICH gain-24dB) – (PICH gain-10dB)


-96

[Setting Tradeoffs]

If the value of this parameter is too small, the system capacity can be improved largely when the radio environments are good and the voice quality is not reduced largely.

If the value of this parameter is too great, the voice quality is not affected largely but the system capacity is reduced sharply.

VFCHMAXGAINR2 (Voice Service FCH Max. Gain 2)

DFCHMAXGAINR2 (Data Service FCH Max. Gain 2)

[Description]

They specify the maximum gain 2 of the forward FCH with two branches, and are set separately based on voice service and data service.

See VFCHMAXGAINR1 (Voice Service FCH Max. Gain 1) and DFCHMAXGAINR1 (Data Service FCH Max. Gain 1).

[Type]

It is an A3 interface and Abis interface parameter used by the BTS.

[Range and Units]



2007-7-25


For details, see 3.1.3

[Operating Range]

(PICH gain – 24 dB) – (PICH gain – 10 dB)


PICH gain – 3 dB, that is, if PICH gain is -28, the recommended value is -40.

The value recommended by Qualcomm also can be used.

[Setting Tradeoffs]




[Description]

They specify the minimum gain 2 of the forward FCH with two branches and are set separately based on voice service and data service.

See VFCHMINGAINR1 (Voice Service FCH Min. Gain 1) and DFCHMINGAINR1 (Data Service FCH Min. Gain 1).

[Range and Units]



[Operating Range]

(PICH gain – 24 dB) – (PICH gain – 10 dB)


-96

[Setting Tradeoffs]


VFCHMAXGAINR3 (Voice Service FCH Max. Gain 3)

DFCHMAXGAINR3 (Data Service FCH Max. Gain 3)

[Description]

They specify the maximum gain 3 of the forward FCH with three or more branches, and are set separately based on voice service and data service.


[Range and Units]


2007-7-25




[Operating Range]

(PICH gain - 5dB)– (PICH gain - 2dB)


PICH gain – 3 dB, that is, if the PICH gain is -28, the recommended value is -40.

[Setting Tradeoffs]




[Description]

They specify the minimum gain 3 of the forward FCH with three or more branches, and are set separately based on voice service and data service.

See VFCHMINXGAINR1 (Voice Service FCH Min. Gain 1) and DFCHMINGAINR1 (Data Service FCH Min. Gain 1).

[Range and Units]



[Operating Range]

(PICH gain- 24 dB) – (PICH gain-10 dB)


-96

[Setting Tradeoffs]


SCHINITGAIN 1X (1X F-SCH Initial Tx Gain)





SCHINITGAIN32X (32X F-SCH Initial Tx Gain)

[Description]


2007-7-25


They indicate initial Tx power gains of forward SCH. For the representation methods, see 3.1.3 .

The representation methods In the R03 and later are different.

During the capacity test, the values of the parameter can be small to ensure the capacity.

[Type]

It is an Abis interface parameter used by the BTS.

[Range and Units]


For detail, see 3.1.3 .

[Operating Range]

-255–0


When the PICH gain is -28, the recommended values are shown in Table 3-4.



1x -44

2x -44

4x -44

8x -32

16x -32

32x -28

[Setting Tradeoffs]

This parameter is initial Tx power of forward traffic channel used by IS2000 MSs. When IS2000 MSs use forward fast power control, the initial power is the same as the maximum power and can decrease quickly.

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

[Description]

It indicates Eb/Nt offset of RC4 to Rc3.

Before sending the FWDINITEN (Forward Initial EB/Nt) and FWDMAXEN (Forward MIN Eb/Nt) and FWDMINEN (Forward Min. Eb/Nt) to the MS, BSC adds the offsets in different RCs.

All the parameters related to forward outer loop set value are set based on RC3.

[Type]


2007-7-25



[Range and Units]


[Operating Range]

0–255


2, that is, 0.25 dB

[Setting Tradeoffs]

None

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

[Description]

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

[Type]


[Range and Units]


[Operating Range]

0–255


2

[Setting Tradeoffs]

None

FWDSCHMAXGAIN1X (1X F-SCH Max. TX Power)

FWDSCHMAXGAIN2X (2 X F-SCH Max. TX Power)





[Description]

They indicate the maximum Tx powers of forward fast power control for SCH at different rates. For the representation methods, see 3.1.3 .


2007-7-25


In the R03 and later, the power control parameters for SCH at different rates are set separately to realize the power control at different rates.

[Type]


[Range and Units]

-255–0, in the unit of: 0.25 dB


[Operating Range]

-255–0





1x -44

2x -44

4x -36

8x -32

16x -24

32x -20

[Setting Tradeoffs]

When the channel power gain is set, the following must be considered: The relationship between the capacity and power resource Contradiction between the power and interference, that is, the interference increases

when the power increases.

FWDSCHMINGAIN1X (1X F-SCH Min. Tx Power)

FWDSCHMINGAIN2X (2 X F-SCH Min. Tx Power)





[Description]

They indicate the minimum Tx powers of forward fast power control for SCH at different rates. For details, see 3.1.3 .


2007-7-25


[Type]


[Range and Units]



[Operating Range]

-255–0





1x -80

2x -76

4x -72

8x -64

16x -52

32x -52

[Setting Tradeoffs]

When the channel power gain is set, the following must be considered: The relationship between the capacity and power resource must be considered into

the setting of channel power gain Contradiction between the power and interference, that is, the interference increases

when the power increases.

3.7 Target FER Configuration

[Command name]

MOD FER (Base Station Controller Management\Configuration Management\Algorithm Configuration\Modify Target FER Configuration)

For the representation of FER related parameters, see 3.1.3 .

FWDVCFCHFER1 (F-FCH Voice Service Expected FER1)

[Description]

It indicates F-FCH voice service expected FER1.


2007-7-25


As for IS95 MSs, the forward power control can be measurement report power control or EIB power control. In the SPU or power control module of FMR, this parameter is used to calculate the forward power, so that the received FER can converge the target FER.

As for IS2000 MSs, the forward power control is fast power control. This parameter is sent to the MS through the channel assignment message, and determines the set value of forward outer loop power control, so that received FER can converge target FER.

[Type]

As for IS95 MSs, it is an internal BSC algorithm parameter used by SPU or power control module of FMR.

As for IS2000 MSs, It is an Um interface parameter used by the MS.

[Range and Units]

0–30

[Operating Range]

0–10, that is, 1%–5%


2, that is, 1%

[Setting Tradeoffs]

If the forward target FER is too small, the quality of forward link may be good through the forward power control, and more forward powers are required.

If the forward target FER is too great, the quality of forward link may be bad and there are less forward powers required.

When the forward target FER is 1%–3%, there is no sharp difference of forward voice quality. The value of this parameter must increase properly to save the forward power and improve the forward capacity.

REVVCFCHFER1 (R-FCH Voice Service Expected FER1)

[Description]

It indicates R-FCH voice service expected FER1.

In the power control module of FMR, it calculates the set value of reverse outer loop power control, so that the received FER can converge target FER.

[Type]

It is an internal BSC algorithm parameter used by the power control module of FMR.

[Range and Units]

0–30

[Operating Range]

0–10, that is, 1%–5%



2007-7-25


2

[Setting Tradeoffs]

If the reverse target FER is too small, the quality of reverse link may be good after the reverse power control, and more reverse powers are required.

If the reverse target FER is too great, the quality of reverse link may be bad and there are less forward powers required.

When reverse target FER is 1%–3%, there is no sharp difference of voice quality. The value of this parameter must increase properly to save the MS power and improve the reverse capacity.

FWDVDCCHFER1 (F-DCCH Voice Service Expected FER1)

REVVDCCHFER1 (R-DCCH Voice Service Expected FER1)

[Description]

See the FWDVCFCHFER1 (F-FCH Voice Service Expected FER1)and REVVCFCHFER1 (R-FCH Voice Service Expected FER1).

FWDDATFCHFER1 (F-FCH Data Service Expected FER1)

[Description]

It indicates F-FCH data service expected FER1 and is used for data service calls only. For details, see the FWDVCFCHFER1.

[Type]

As for IS95 MSs, it is an internal BSC algorithm parameter used by SPU or power control module of FMR.

As for IS2000 MSs, It is an Um interface parameter used by the MS.

[Range and Units]

0–30

[Operating Range]

0–10, that is, 1%–5%


2, that is, 1%

Whatever the voice service or data service is, the FCH contains signaling, so the target FER cannot be too great.

[Setting Tradeoffs]

See the FWDVCFCHFER1.


2007-7-25


REVDATFCHFER1 (R-FCH Data Service Expected FER1)

[Description]

It indicates R-FCH data service expected FER1 and is used for data service calls only. For details, see the REVVCFCHFER1.

[Type]

It is an internal BSC algorithm parameter used by power control module of FMR.

[Range and Units]

0–30

[Operating Range]

0–10, that is, 1%–5%


2, that is, 1%

Whatever the voice service or data service is, the FCH contains signaling, so the target FER cannot be too great.

[Setting Tradeoffs]

See the REVVCFCHFER1.

FWDDATDCCHFER1 (F-DCCH Data Service Expected FER1)

REVDATDCCHFER1 (R-DCCH Data Service Expected FER1)

[Description]

See the FWDDATFCHFER1 (F-FCH Data Service Expected FER1) and REVDATFCHFER1 (R-FCH Data Service Expected FER1).

FWDDATSCHFER1X (Forward 1X SCH Target FER)






[Description]

They indicate target FERs of F-SCHS at different rates.

In the forward fast power control, they are sent to the MS through the SCH assignment message, and determine the set value of Forward SCH outer loop power control, so that received FER can converge the target FER.

[Type]

It is an Um interface parameter used by the MS.


2007-7-25


[Range and Units]

0–31

[Operating Range]

0–10, that is, 1%–5%


The recommended values are shown in Table 3-7. For example, “10” corresponds to 5%.



1x 2

2x 4

4x 4

8x 6

16x 6

32x 10

[Setting Tradeoffs]

If the forward target FER is too small, the quality of forward link may be good after the forward power control, and more forward powers are required.

If the forward target FER is too great, the quality of forward link may be bad and there are less forward powers required.

The target FER for SCH is larger than that for FCH, because the realtime of data service is worse than that of voice service, and the error codes can be corrected through the retransmission.

High speed SCH requires larger power and low FER consumes more powers, so the target FER cannot be greater than 15%.

REVDATSCHFER1X (Reverse 1X SCH Target FER)






[Description]

They indicate target FERs for R-SCHS at different rates.


2007-7-25


In the reverse closed loop power control, they are sent to the MS through the SCH assignment message, and determine the set value of SCH reverse outer loop power control, so that received FER can converge the target FER.

[Type]

It is an Um interface parameter used by the MS.

[Range and Units]

0–30

[Operating Range]

0–10, that is, 1%–5%


The recommended values are shown in Table 3-8. For example, “10” corresponds to 5%.


Rate Recommended values

1x 2

2x 4

4x 4

8x 6

16x 6

32x 10

[Setting Tradeoffs]

If the reverse target FER is too small, the quality of reverse link may be good after the reverse power control, and more reverse powers are required.

The values of the parameters can increase properly to save the MS power and improve the reverse capacity, but the target FER cannot be greater than 15%.

Chapter 4 Handoff Parameters

4.1 Module Handoff Parameters

[Command name]

MOD BSCHO (Base Station controller Management \ Configuration Management \ Algorithm Configuration \ Modify BSC Level Handoff Parameters)


2007-7-25


LST BSCHO (Base Station controller Management \ Configuration Management \ Algorithm Configuration \ Query BSC Level Handoff Parameters)

The parameters are inter-BSC handoff parameters, and they are the same for the carriers in the entire BSC.

MAXSHO (Max Number of SHO Branches)

[Description]

It indicates the maximum number of branches in the soft handoff target active set. According to the protocols, the active set of MS can support a maximum of six branches. In the case of soft handoff decision, the number of branches in the soft handoff target active set is restricted based on the parameter.

[Type]


[Range and Units]

2–6

[Operating Range]

3–6


3

[Setting Tradeoffs]

If the value of this parameter is too great, soft handoff ratio increases and too many forward resources are occupied and the forward capacity is wasted. If the value of this parameter is too small, the soft handoff ratio decreases, but the soft handoff gain cannot be used properly to reduce the quality of service (QoS). If the system traffic is small, but there are many resources, the value of this parameter can be 4 to improve the QoS and reduce the call drop rate. [Additional Comments] None

INTRABSCHHOSW (Intra-BSC HHO Macro Diversity Switch)

[Description]

It controls whether to use the macro diversity hard handoff of intra-BSC.

[Type]


[Range and Units]

0 and 1

0—Off and 1---ON


2007-7-25


[Operating Range]

0 and 1


1

[Setting Tradeoffs]

The hard handoff macro diversity enables the MSs to perform hard handoff to multiple target carriers and helps use the soft handoff gain in time and improve the hard handoff success rate. If there are too many hard handoff target carriers, too many resources are occupied for a short time.

INTERBSCHHOSW (Inter-BSC HHO Macro Diversity Switch)

[Description]

It controls whether to use the macro diversity hard handoff of inter-BSC.

[Type]


[Range and Units]

0 and 1

0—Off and 1---ON

[Operating Range]

0 and 1


0

[Setting Tradeoffs]

The hard handoff macro diversity enables the MSs to perform hard handoff to multiple target carriers and helps use the soft handoff gain in time and improve the hard handoff success rate. If there are too many hard handoff target carriers, too many resources are occupied for a short time.

HHOMAXTARGNUM (Max Number of HHO Branches)

[Description]

It indicates the maximum number of branches in the hard handoff target active set allowed by the macro diversity hard handoff. The active set of MS supports a maximum of six branches.

[Type]


[Range and Units]

1–6


2007-7-25


[Operating Range]

1–6


6

[Setting Tradeoffs]

If only the hard handoff algorithms measurable by the pilot of hard handoff target pilot are used (such as same-frequency hard handoff algorithm, MS assisted hard handoff algorithm, and pilot beacon hard handoff algorithm) and the strength of target pilot is known, so the hard handoff target is accurate, the value of this parameter is set to 3. This case is the same as the maximum number of branches in soft handoff target active set.

If the hard handoff algorithms not measurable by the strength of hard handoff target pilot are used (such as HANDDOWN hard handoff algorithm and direct hard handoff algorithm), but the hard handoff target is inaccurate, set the parameter to a larger value to increase the hard handoff success rate.

MAHHOSW (MAHHO Switch)

[Description]

It indicates whether to use MS assisted hard handoff for the MSs of above IS95B in the case of different-frequency hard handoff.

According to the protocols, only the MSs of above IS95B support different frequency search in the traffic channel.

[Type]


[Range and Units]

0 and 1

0—Off and 1---ON

[Operating Range]

0 and 1


0

[Setting Tradeoffs]

The MSs of above IS95B use the MS assisted hard handoff algorithm, instead of new hardware, to perform different frequency hard handoff.

The MSs measure signal strength of pilots automatically. At that time, the hard handoff target is accurate, and the success rate is high. When measuring the different frequency strengths, the MSs disconnect the communication with serving channel number, and the call quality decreases.

This method is recommended when the MSs of IS95B perform different frequency hard handoff.


2007-7-25


BEACONSW (Pilot Beacon HHO Switch)

[Description]

It controls whether to use pilot beacon HHO switch.

[Type]


[Range and Units]

0 and 1

0—Off and 1---ON

[Operating Range]

0 and 1


0

[Setting Tradeoffs]

Setting the pilot beacon hardware is required when the pilot beacon is used for different frequency hard handoff.

Therefore, the network costs increase. More beacon pilots add the interference for the system.

When the pilot beacon hard handoff is used, the coverage of beacon pilot must be consistent with that of real pilot. Different frequency hard handoff using beacon pilot helps the MSs of IS95A earlier search the different frequency signal strength.

It is applicable to the MSs of each revision and the success rate is high.

PLTMINBR (Branch Number at Pilot Pollution)

[Description]

It is the handoff branch threshold for judging whether pilot pollution is generated. When the number of pilots with the strength greater than T_ADD exceeds the parameter, the pilot pollution is present.

[Type]


[Range and Units]

4–6

[Operating Range]

4–6


6


2007-7-25


[Setting Tradeoffs]

The greater the value of this parameter, the higher of the threshold for judging the pilot pollution is, and vice versa.

PLTRTHRS (Relative Threshold at Pilot Pollution)

[Description]

It is the handoff branch threshold for judging whether pilot pollution is generated. When the difference of the strength of the strongest pilot and second strongest pilot is less than or equals to the value of this parameter, the pilot pollution is present.

[Type]


[Range and Units]

0–63, in the unit of 0.5 dB, that is, 0–31.5 dB

[Operating Range]

0–28


4

[Setting Tradeoffs]

The greater the value of this parameter, the lower of the threshold for judging the pilot pollution is, and vice versa.

MAXDIST (Max Distance between Neighbor Cell and Serving Cell)

[Description] It is one of the parameters for detecting missing neighbor cell. The MS sends the detected PN to the BSC through PSMM or CFSRPM. If the PN is not present in the active set or neighbor set of MS, the BSC searches the target cell corresponding to the PN within the distance from the serving cell of MS less than the cell coverage range. [Type]


[Range and Units]

0–65535, in the unit of 100 meters

[Operating Range]

0–1000


100

[Setting Tradeoffs]


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The larger the cell radius in the network, the greater the value of this parameter is, and vice versa.

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

[Description]

It is one of the parameters for BSC handoff penalty. Currently, the function is disabled by default.

When successive handoff requests are sent to a carrier, if the handoff failure because of applying for radio resource or establishing terrestrial resource failure, and the handoff failures are greater than the value of this parameter, soft handoff requests to the carrier are prohibited within a period in the case of soft handoff decision

[Type]


[Range and Units]

1–5

[Operating Range]

1–5


3

[Setting Tradeoffs]

The greater the value of this parameter, the higher of the threshold for start the penalty is, and vice versa.

4.2 Handoff Parameters

[Command name]

MOD HO (Base Station controller Management \ Configuration Management \ Algorithm Configuration \ Modify Handoff Parameters)

The parameters are soft handoff parameters of each carrier and most of them are standard Um interface parameters.

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

It defines the search window size used when the MS searches pilots in the active set and candidate set.

The MS searches the pilots, with the earliest arriving usable multipaths as their search centers respectively. It is related to multipaths of pilots but is not related to the relative propagation delay between pilots.


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[Type]

It is an Um interface parameter (SPM/ESPM/ITSPM and EHDM/GHDM/UHDM).

[Range and Units]

0–15 (For details, see Table 4-1.)

Table 4-1 Search window size

[Operating Range]

5–9 (20–80 chips)


5 (20 chips)

[Setting Tradeoffs]

All pilot siganls must fall into the search window for the active set according to local propagation delay.

If the value of this parameter is too small, some signals in the active set may fall outside the search window. These signals may become interference, which affects link quality.

If the value of this parameter is too great, some non-related signals may also fall into the search window, which affects link quality too.

A search window with a bigger size will slow down the speed of the MS searching neighbor pilots. In this case, the handoff cannot be initiated in time and system performance decreases.

SRCHWINN (Search Window Size for the Neighbor Set)

[Description]

It defines the search window size used when the MS searches pilots in the neighbor set.

The MS searches the pilots, with the time of the earliest arriving usable multipaths as its time reference and the PN offset of the neighbor pilots as its search center. Therefore, this parameter is related to both the multipaths of the neighbor pilots and the relative propagation delay from neighbor pilots to reference pilots.


2007-7-25


[Type]

It is an Um interface parameter (SPM/ESPM/ITSPM and GHDM/UHDM).

[Range and Units]


[Operating Range]

8–11


8 (60chips)

[Setting Tradeoffs]

This parameter is set according to the multipaths of the neighbor pilots and the propagation delay from neighbor pilots to reference pilots. The setting of the this parameter must guarantee that all neighbor pilot signals fall into the search window in the neighbor set.

Note that the search window takes the time of the earliest arriving multipahts as its reference time and the PN offset of neighbor pilot as its search center.

If the value of this parameter is too small, neighbor pilot signals may fall outside the search window. In this case, the neighbor pilot is missing. Therefore, this neighbor pilot cannot be added to the active set and normal soft handoff cannot be initiated. Thus call drop occurs.

If the value of this parameter is too great, the time of the MS searching each pilot increases. In this case, the speed of the MS searching neighbor pilots slows down, which may delay the soft handoff and affect the handoff performance.

SRCHWINR (Search Window Size for the Remaining Set )

[Description]

It defines the search window size used when the MS searches the pilots in the remaining set.

The MS searches the pilots in the remaining set, with the time of the earliest arriving usable mutlipaths as its time reference, and the PN offset of the pilots in the remaining set as its search center, which is the same as the case of MS searching the pilots in neighbor set.

[Type]

It is an Um interface parameter (SPM/ESPM/ITSPM and GHDM/UHDM).

[Range and Units]


[Operating Range]

9–12


9 (80chips)


2007-7-25


[Setting Tradeoffs]

If the value of this parameter is too small, the usable pilots in the remaining set may be missing. In this case, the missing neighbor detection of the BSC cannot be fully used.

If the value of this parameter is too great, the MS may search out other non-related signals. In addition, the time of the MS searching the pilots in remaining set may increase, which slows down the MS search speed.

NBRMAXAGE (Neighbor Set Maximum AGE)

[Description]

It defines the maximum age of the pilots in neighbor set.

The MS has a counter for each pilot in neighbor set. Each time when the MS receives a neighbor list update message (NLUM), the value of the counter for the original pilot in neighbor set is increased by 1.

If the value of the counter exceeds the value of this parameter, this pilot will be deleted from the neighbor set. Therefore, if the value of this parameter is set to 0, each time when the MS receives a NLUM, the MS deletes all pilots in the original neighbor set. Thus the MS can always use the contents of the newest NLUM.

If the value of this parameter is 2, the pilot moving back from the active set or the candidate set to neighbor set (this pilot is not present in two continuous NLUMs) is deleted from neighbor set.

[Type]

It is an Um interface parameter (SPM/ESPM/ITSPM).

[Range and Units]

0–15

[Operating Range]

0–3


0

[Setting Tradeoffs]

If the value of this parameter is too great, the pilots moving back from the active set or candidate set can be present in the neighbor set for a longer time. In this case, the new neighbor pilots in the NLUM may be exclusive from the neighbor set of the MS (when the number of neighbor pilots exceeds the maximum number in the MS neighbor set).

If the value of this parameter is 0, each time when the MS receives a NLUM, the MS uses the neighbor pilot lists in the NLUM as the new neighbor set.

When the network has just been finished, because the neighbor relation configuration is not done, the value of this parameter can be set to 1. In this case, the MS is allowed to inherit the used pilots in neighbor set for some time.

If the number of neighbor cells is large, the value of this parameter is recommended to be 0 so that the MS can use the contents of the neighbor pilots in the newest NLUM delivered by the BSC.


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TADD (Pilot Good & Available Threshold)

[Description]

It defines when the MS moves the pilots in neighbor set to candidate set and sends a pilot strength measurement message (PSMM) to the BSC. Pilot can be incorporated into active set when its strength reaches this threshold. Both the MS and BSC must use this parameter.

[Type]


[Range and Units]


[Operating Range]

-24 to -28


-28

[Setting Tradeoffs]

If the value of this parameter is too great (for example, it is larger than -24), the soft handoff threshold will be too high, which dwindles soft handoff area and reduces soft handoff ratio. In this case, seamless coverage may not be realized. Because soft handoff gain cannot be fully used, call drop may occur.

If the value of this parameter is too small (for example, it is smaller than -28), the soft handoff threshold will decrease, which enlarges soft handoff area and increases soft handoff ratio. In this case, much forward channel resource is cost, thus forward capacity is reduced.

TDROP (Pilot Min. Threshold)

[Description]

If the pilot strength of an active set or a candidate set is higher than the value of this parameter, the MS starts the handoff removal timer for this pilot. For more information, see the description of TTDROP.

[Type]


[Range and Units]


[Operating Range]

-28 to -32


-32


2007-7-25


[Setting Tradeoffs]

If the value of this parameter is too great (for example, it is greater than -28), the soft handoff threshold will be too high. In this case, an available signal will be deleted from the active set immediately. When this available pilot is not in the active set, it becomes interference, which may cause call drop.

If the value of this parameter is too small (for example, it is smaller than -32), the soft handoff threshold will decrease. In this case, a pilot in the active set cannot be easily deleted from this active set, which increases soft handoff ratio and wastes forward capacity.

TTDROP (Pilot Removal Timer Length)

[Description]

If the pilot strength of an active set or a candidate set is lower than TDROP, the MS starts a handoff removal timer for this pilot. If the pilot strength is higher than TDROP after the timer is started, the MS performs reset and closes the handoff removal timer.

For the pilot in candidate set, when the handoff removal timer expires, the MS moves this pilot to neighbor set automatically; for the pilot in active set, when the handoff removal timer expires, the MS sends a PSMM to remind the BSC to delete this pilot.

[Type]


[Range and Units]

0–7

Table 4-2 lists the mapping between TTDROP and timer expiration.

Table 4-2 Relationship between TTDROP and timer expiration

[Operating Range]

2–5


3 or 4 seconds

[Setting Tradeoffs]


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If the value of this parameter is too great, the poor pilot in the active set can be present in the active set for a longer time, which increases soft handoff ratio and wastes the resources on forward traffic channels.

If the value of this parameter is too small, when the pilot strength of the active set fluctuates, the pilots can be easily deleted even if its strength deteriorates in a short time. In this case, TTDROP cannot perform hysteresis function, which may cause frequent handoff.

TCMP (Pilot Compare Threshold)

[Description]

If the pilot strength of the candidate set is TCMP/2 higher than that of the active set, the MS sends a PSMM to remind the BSC to perform the handoff.

[Type]


[Range and Units]

0-15, in the unit of 0.5 dB

[Operating Range]

4–6


5

[Setting Tradeoffs]

If the value of this parameter is too small, the pilot in the candidate set can easily replace the pilot in the active set, so the handoff occurs frequently.

If the value of this parameter is too great, the pilot in the candidate set can hardly replace the pilot in the active set, so the pilot in the candidate set is always present as interference, which reduces forward capacity.

SOFTSLOPE (Soft Handoff Increasing Slope Ratio)

[Description]

It defines the slope ratio when the MS performs dynamic threshold soft handoff.

When the dynamic soft handoff is enabled, this parameter is used to add and delete a branch. This parameter is used by the MS. Only MSs above IS95B supports dynamic threshold soft handoff.

[Type]

It is an Um interface parameter (ESPM/ITSPM and GHDM/UHDM).

[Range and Units]

0-63, in the unit of 1/8

[Operating Range]


2007-7-25


16–24


The recommended value is 0, namely, the dynamic threshold soft handoff is disabled. When it is enabled, the recommended value is 18, indicating 2.25.

[Setting Tradeoffs]

If the value of this parameter is 0, the dynamic threshold soft handoff of the MS is disabled; otherwise it is enabled.

The smaller the value of this parameter, the higher the dynamic adding threshold and the dynamic removing threshold are when the pilot strength of the active set is fixed. In this case, to add the pilot to the active set is hard, but to delete the pilot from the active set is easy. Thus soft handoff ratio decreases. However, the soft handoff gain cannot be fully used and the call drop rate increases.

The greater the value of this parameter, the lower the dynamic adding threshold and the dynamic removing threshold are when the pilot strength of the active set is fixed. In this case, the soft handoff ratio increases and excessive forward power is consumed. Thus the valid forward capacity is reduced.

ADDINTERC (Soft Handoff Pilot Adding Intercept)

[Description]

It defines the adding intercept when the MS performs dynamic threshold soft handoff. The BSC sets this parameter for the MS in binary supplementary code.

[Type]


[Range and Units]

-32-31, in the unit of 0.5 dB

[Operating Range]

0–6


6, that is, 3 dB

[Setting Tradeoffs]

The smaller the value of this parameter, the lower the dynamic adding threshold is, and the easier to add neighbor pilot to the active set. In this case, however, the forward capacity is reduced.

The greater the value of this parameter, the higher the dynamic adding threshold is, and the harder to to add neighbor pilot to the active set. In this case, soft handoff ratio decreases, but the soft handoff ratio cannot be fully used, and the call drop rate increases.

DROPINTERC (Soft Handoff Pilot Removing Intercept)


2007-7-25


[Description]

It defines the removing intercept when the MS performs dynamic threshold soft handoff. The BSC sets this parameter for the MS in binary supplementary code.

[Type]


[Range and Units]


[Operating Range]

0–6


6, that is, 3 dB

[Setting Tradeoffs]

The smaller the value of this parameter, the lower the dynamic removing threshold is. In this case, deleting the pilots in the active set is harder and soft handoff occurs more frequent, which reduce the forward capacity.

The greater the value of this parameter, the higher the dynamic removing threshold is. In this case, deleting the pilots in the active set is easier and soft handoff ratio decreases. However, the soft handoff gain cannot be fully used, which increases call drop rate.

SOFTM (Dynamic Threshold Slop for Adding Branch to Active Set)

[Description]

It is used when the BSC performs soft handoff decision. Except that, its functions are similar to that of the SOFTSLOP used by the MS to calculate the dynamic threshold. IS95 MS dynamic handoff switch and IS2000 MS dynamic handoff switch control the BSC to calculates the dynamic threshold for IS95 MS and CDMA 2000 1X MS respectively. Currently, this function is disabled by default.

[Type]


[Range and Units]

0-63, in the unit of 1/8

[Operating Range]

16–24


18

[Setting Tradeoffs]

The smaller the value of this parameter, the higher the soft handoff threshold is. In this case, the soft handoff ratio decreases. However, because the soft handoff gain cannot be fully used, the call drop rate is high.


2007-7-25


The greater the value of this parameter, the lower the soft handoff threshold is. In this case, to add neighbor pilots to the active set is easier, which increases soft handoff ratio and guarantees link quality. However, excessive forward power is consumed. Thus the forward capacity is reduced.

SOFTB (Dynamic Threshold Intercept for Adding Branch to Active Set)

[Description]

It is used when the BSC performs soft handoff decision. Except that, its functions are similar to that of the ADDINTERC used by the MS to calculate the dynamic threshold.

[Type]


[Range and Units]


[Operating Range]

0–6


6, that is, 3 dB

[Setting Tradeoffs]

The smaller the value of this parameter, the lower the dynamic soft handoff threshold. In this case, the soft handoff ratio increases, which may waste forward capacity.

The greater the value of this parameter, the higher the dynamic threshold. In this case, the soft handoff ratio decreases. However, because the soft handoff ratio may not be used properly, call drop rate may increase.

SOFTERHOGAIN (Softer Handoff Gain)

[Description]

When BSC enables softer handoff priority, this parameter is used to add one gain to the pilot in a PSMM (the softer handoff relationship is present in this pilot) so that the pilot can be added to the soft handoff target active set with priority. Currently, this function is disabled by default.

[Type]


[Range and Units]

0-63, in the unit of 0.5 dB

[Operating Range]

0–6



2007-7-25


2

[Setting Tradeoffs]

If the value of this parameter is too great, neighbor pilots with softer handoff relationship can be added to the active set with priority.

If the value of this parameter is too small, the priority of the neighbor pilots with softer handoff relationship is low.

4.3 Pilot Handoff Algorithm Switch Parameters

[Command name]

MOD PHOALG (Base Station controller Management \ Configuration Management \ Algorithm Configuration \ Modify Carrier Handoff Algorithm Switch Parameters)

SFHHOSW (Same-Frequency HHO Switch)

[Description]

It indicates whether the call on a carrier can perform the same-frequency hard handoff.

[Type]


[Range and Units]

0 and 1

0---Off and 1--ON

[Operating Range]

0 and 1


0

[Setting Tradeoffs]

It is configured according to actual condition. If the same-frequency is not supported between BSCs (no A3/A7 path is provided), the same-frequency hard handoff is performed. In this case, this algorithm switch must be enabled.

HDHHOSW (Handdown HHO Switch)

[Description]

It indicates is whether the call on a carrier can perform the handdown hard handoff.

[Type]



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[Range and Units]

0 and 1,

0---Off and 1--ON

[Operating Range]

0 and 1


0

[Setting Tradeoffs]

It is configured according to actual conditions.

If the source cell and target cell have a same channel number, and the channel numbers in the source cell are greater than that in the target cell, the call initiated on the channel numbers in the source cell can be hard-handed off to the common channel number of the source cell and the target cell through handdown handoff if the call is far away from the source cell.

DHHOSW (Direct HHO Switch)

[Description]

It indicates whether the call on a carrier can perform direct hard handoff.

[Type]


[Range and Units]

0 to 1

0---Off and 1--ON

[Operating Range]

0 to 1


0

[Setting Tradeoffs]

It is configured according to actual conditions. If the source cell and the target cell have no common channel number, the handdown hard handoff cannot be used. For the IS95 MS, if the direct hard handoff algorithm used, with the support of hard handoff macro diversity, the hard handoff success rate can also be guaranteed.

4.4 Same-Frequency HHO Parameters

[Command name]


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MOD HHOSF (Base Station controller Management \ Configuration Management \ Algorithm Configuration \ Modify Same-frequency Hard Handoff Parameters)

TADDHHOSF (Same-Frequency HHO Serving Carrier Threshold)

[Description]

When the pilot strength of the soft handoff target active set is lower than the value of this parameter, and the pilot strength of the same-frequency hard handoff target active set is higher than T_HHO_SAME_FREQ_ABS_THRESH, the same-frequency hard handoff is triggered.

[Type]


[Range and Units]


[Operating Range]

-14 to -32


-22

[Setting Tradeoffs]

The smaller the value of this parameter is (for example, smaller than -32), the poorer the signal strength of the source cell side is when the MS performs hard handoff from the source cell to the target cell, and the later the same-frequency hard handoff is triggered. Because heavy same-frequency interference exists on the hard handoff band, if the signal of the source cell is poor, the MS may not receive the EHDM sent by the BTS in the source cell. In this case, hard handoff fails.

If the value of this parameter is too great (for example, larger than -14), the triggering conditions of the same-frequency hard handoff can be easily met. In this case, the hard handoff is triggered depending on the same-frequency HHO absolute threshold.

THHOSFABSTHRS (Same-frequency HHO Target Carrier Threshold)

[Description]

When the pilot strength of the soft handoff target active set is lower than T_ADD_HHO_SAME_FREQ, and the pilot strength of the same-frequency hard handoff target active set is higher than the value of this parameter, the same-frequency hard handoff is triggered.

[Type]


[Range and Units]


[Operating Range]


2007-7-25


-10 to -28


-18

[Setting Tradeoffs]

The smaller the value of this parameter (for example, smaller than -28), the lower the pilot strength for triggering the same-frequency hard handoff in the target cell is. In this case, the same-frequency hard handoff can be easily triggered. However, because the signals in the target cell may be poor, it is hard for the MS to access a target cell. Thus hard handoff fails.

The greater the value of this parameter (for example, larger than -10), the higher the pilot strength for triggering the same-frequency hard handoff in the target cell is. In this case, it is easier for the MS to access the target cell, but the same-frequency hard handoff cannot be easily triggered.

[Additional Comments]

For more the triggering conditions of the same-frequency hard handoff, see [Additional Comments] of TADDHHOSF (Same-Frequency HHO Serving Carrier Threshold).

Generally, the pilot strength of the target cell must be higher than that of the source cell, namely, T_HHO_SAME_FREQ_ABS_THRESH < T_ADD_HHO_SAME_FREQ.

In the R03 and later, the offset is not used.

THHOSFRELTHRS (Same-frequency HHO Relative Threshold)

[Description]

When the pilot strength of the same-frequency hard handoff target set and the pilot strength of the soft handoff target active set are higher than the same-frequency HHO relative threshold, the same-frequency hard handoff is triggered.

[Type]


[Range and Units]


[Operating Range]

2 to 16


5

[Setting Tradeoffs]

The greater the value of this parameter, the stronger the signals in the hard handoff target cell is higher than that in the source cell, so the easier for the MS to access a forward channel in the target cell. However, because the signals in the source cell for hard handoff are poor, the MS may not receive the HDM of the source cell.


2007-7-25


The smaller the value of this parameter, the easier for the hard handoff to be triggered. In this case, the signals on the forward channels of the source cells side do not deteriorate dramatically, which is good for the MS to receive the HDM of the original cell, but the MS may not receive the access a forward channel of the source cell.

4.5 Candidate Pilot Search Control Parameters

[Command name]

MOD CFSC (Base Station controller Management \ Configuration Management \ Algorithm Configuration \ Modify Candidate Frequency Search Control Parameters)

SRVFRQECTHRS (Total Receiving Power Threshold of Serving Frequency)

[Description]

It defines the total receiving power threshold of serving frequency. When a CFSRQM (its search type is periodic search) is sent to the MS, the MS determines whether to start or stop inter-frequency search according to this parameter and total EC/IO threshold of serving frequency.

[Type]

It is an Um interface parameter (CFSRQM).

[Range and Units]

0 to 31 (the unit is related to the actual power, and see the [Setting Tradeoffs]) [Operating Range]

0 to 31


31

[Setting Tradeoffs]

If the MS does not intend to use the total receiving power of serving frequency to determine whether to start or stop inter-frequency search, the value of this parameter must be set to 1111 (that is, 31 dB).

If the MS intends to start inter-frequency search when the total receiving power of the serving frequency is lower than total_ec_thresh, it must stop the inter-frequency search when the total receiving power of the serving frequency is higher than total_ec_thresh. In this case, the value of parameter must be set to

.

SRVFRQECIOTHRS (Total EC/IO Threshold of Serving Frequency)

[Description]

It indicates the total EC/IO threshold of serving frequency. When a CFSRQM (its search type is periodic search) is sent to the MS, the MS determines whether to start or stop


2007-7-25


inter-frequency search according to this parameter and total receiving power threshold of serving frequency.

If the value of this parameter is set to -31, the MS does not use the total Ec/Io threshold of serving frequency to determine whether to start or stop inter-frequency search.

[Type]


[Range and Units]


[Operating Range]

-14 to -28, and -31


-31

[Setting Tradeoffs]

If the MS does not intend to use the total EC/IO of serving frequency to determine whether to start or stop inter-frequency search, the value of this parameter must be set to -31 dB.

If the MS intends to start inter-frequency search when the total Ec/Io of serving frequency is lower than total_ec_io_thresh, it must stop the inter-frequency search when the Ec/Io of serving frequency is higher than total_ec_thresh. In this case, the value of

this parameter must be set to .

If the value of this parameter is set to -20 dB, that is, the total Ec/Io of serving frequency is lower than -10 dB, the MS starts inter-frequency search.

DRXPWRTHRS (Receiving Power Difference Threshold)

[Description]

It indicates the power difference of the receiving power of the candidate frequency and that of the serving frequency. Set the power difference of the serving frequency and candidate frequency to minimum_power_diff. When the actual power difference of the candidate frequency and serving frequency is lower than the minimum_power_diff, the MS stops frequency search. This parameter is also used when the MS performs hard handoff. If the power difference of the target frequency and serving frequency is lower than the threshold defined by this parameter, the hard handoff fails and the MS returns to the original channel.

[Type]


[Range and Units]

0 to 31 (the unit is related to the actual power, and see the [Setting Tradeoffs]) [Operating Range]

0 to 31



2007-7-25


0

[Setting Tradeoffs]

If the MS does not intend to stop searching the candidate frequency and hard-handing off to the candidate frequency automatically according to the power difference of the candidate frequency and serving frequency, the value of this parameter is set to 0.

When the power difference of the candidate frequency and serving frequency is lower than the minimum_power_diff (in the unit of dB), the MS stops frequency search automatically. In this case, the value of this parameter must be set to

.

For example, if the power of the candidate frequency is 4dB lower than that of the receiving frequency, the MS does not perform frequency search and hard handoff; otherwise the value o this parameter should be set to 17.

MINPLTECIO (Min. Pilot EC/IO of Candidate Frequency)

[Description]

It is the minimum pilot strength threshold for the MS to demodulate forward channels on candidate frequency. When receiving an HDM, the MS attempts to demodulate the forward channels of the target pilot. If the total pilot strength of the active set of the candidate frequency is lower than the minimum pilot EC/IO of candidate frequency, the MS takes that the frequency search or handoff fails, and stops demodulating forward channels. If the value of this parameter is set to 0, it means that this parameter is not used. In this case, the MS performs the frequency search or hard handoff regardless of the EC/IO strength of the active set of the candidate set.

[Type]


[Range and Units]


[Operating Range]

-31 to 0


0

[Setting Tradeoffs]

If the MS does not intend to stop demodulating the target traffic channel automatically according to the EC/IO strength of the target active set of the candidate set, the value of this parameter must be set to 0; otherwise the value of this parameter is not set to 0. For example, if the value is set to -20dB, it means that if the overall pilot strength of the active set of the candidate frequency is lower than -10dB, the MS does not demodulate forward channels of the target active set.

CFTADD (Candidate Frequency T_ADD)

[Description]


2007-7-25


When reporting a CFSRPM to BSC, the MS uses this parameter to determine whether to report the PN of a candidate frequency. For example, if the value of this parameter is set to -12dB, the MS only reports the pilots whose strength is higher than -12dB to BSC in the CFSRPM.

[Type]


[Range and Units]


[Operating Range]

-16 to -32


-28

[Setting Tradeoffs]

The smaller the value of this parameter (for example, smaller than -32 dB), the lower the corresponding actual threshold is, and the easier for the MS to report the pilots of the candidate frequency. In this case, more and more CFSRPMs are reported, and many of which may be of no value. Therefore, signaling load increases.

The greater the value of this parameter (for example, larger than -16 dB), the higher the corresponding actual threshold is, and the harder for the MS to report the pilots of the candidate frequency. In this case, the amount of the reported signaling decreases. However, because the reporting conditions are strict, handoff time may be missing.

TFWAITTM (Wait Period on Candidate Frequency)

[Description]

The MS starts a handoff timer when performing hard handoff. Before the timer expires, the MS must receive N11m (that is, 1) good frame of the target pilot; otherwise the MS takes that the handoff fails. This parameter sets the length of the timer, in the unit of 80ms.

[Type]


[Range and Units]

0-15, in the unit of 80 ms

[Operating Range]

2 to 15


15

[Setting Tradeoffs]

The greater the value of this parameter, the longer for the MS to wait on the target channel is if no target channel is captured during hard handoff. The recommended value


2007-7-25


is 15, indicating that the MS can wait up to 1.2s. If the MS is forbidden to return to the original channel when hard handoff fails, this parameter is recommended to set to the maximum value so that the MS has enough time to capture the target channel.

The smaller the value of this parameter, the shorter for the MS to wait on the target channel is if no target channel is captured during hard handoff.

CFPLTINC (Pilot Pseudo Noise Code Increase Step during Candidate Frequency Search)

[Description]

It is the PNINC on candidate frequency. After hard-handed off to candidate frequency, the MS searches the remaining active set directly using this parameter as the PLTINC of the target frequency.

[Type]


[Range and Units]

0-15, in the unit of 64 chips

[Operating Range]

2 to 6


4

[Setting Tradeoffs]

It is set according to the actual PN planning on the candidate frequency.

CFSRCHWINN (Neighbor Set Search Window of Candidate Frequency)

[Description]

It is the default neighbor set search window of candidate frequency. In the CFSRQM, it can assign a different search window for a neighbor pilot of each candidate frequency. If no other search window is assigned for the pilots of a candidate frequency, the MS will use this default parameter to search pilots in the neighbor set of the candidate frequency.

[Type]


[Range and Units]

0 to 15

[Operating Range]

8 to 11


8 (60chips)


2007-7-25


[Setting Tradeoffs]

If the value of this parameter is large, the signals of the neighbor pilots of candidate frequency are more likely falling into the search window. Therefore, more neighbor pilots of candidate frequency are searched, but the search time is longer and some non-related signals will be searched.

If the value of this parameter is small, the delay between candidate frequency and serving frequency is long. In this case, the signals of the neighbor pilots of candidate frequency cannot be searched easily.

CFSRCHWINR (Remaining Set Search Window of Candidate Frequency)

[Description]

It is the remaining set search window of candidate frequency. After the MS has successfully hard-handed off to the candidate frequency, it uses this parameter as SRCHWINR to search remaining set.

[Type]


[Range and Units]

0 to 15 (For the unit, see Table 4-1)

[Operating Range]

9 to 12


9 (80chips)

[Setting Tradeoffs]

See SRCHWINR.

SRCHPRD (Periodic Search Period)

[Description]

When the MS is ordered to perform periodic search, the MS starts a periodic candidate frequency search timer, and this parameter is used to set the length of this timer.

[Type]


[Range and Units]

0 to 15s

Table 4-3 lists the relationship between the parameter value and actual period.


2007-7-25


Table 4-3 Relationship between the parameter value and actual period

[Operating Range]

1 to 5


2 (2s)

[Setting Tradeoffs]

The greater the value of this parameter, the longer for the MS to report the candidate frequency search report. In this case, it is harder for the BSC to obtain the information of the pilot strength of candidate frequency. Therefore, the hard handoff cannot be triggered in time.

The smaller the value of this parameter, the more frequent for the MS to report the candidate frequency search report, which is good for the BSC for trigger hard handoff in time. However, heavy signaling load and continuous inter-frequency search have bad influence on conversation quality.

4.6 Mobile Assisted HHO Parameters

[Command name]

MOD HHOMA (Base Station controller Management \ Configuration Management \ Algorithm Configuration \ Modify MS Assisted Hard Handoff Parameters)

TADDMAHHO (MAHHO Serving Carrier Threshold)

[Description]

When the strength of the soft handoff target active set is lower than the value of this parameter, and the strength of the mobile assisted hard handoff target active set is higher than T_MAHHO_ABSOLUTE_THRESH, the mobile assisted hard handoff is triggered.

[Type]


[Range and Units]


2007-7-25



[Operating Range]

-14 to -32


-20

[Setting Tradeoffs]

The smaller the value of this parameter is (for example, smaller than -32), the poorer the signal strength of the source cell side is when the MS performs hard handoff from the source cell to the target cell, and the later the hard handoff is triggered. In this case, it is hard for the MS to receive the HDM delivered by the BTS at the source cell side, so the hard handoff may fail.

If the value of this parameter is too great (for example, larger than -14), the triggering conditions of hard handoff can be easily met. In this case, the hard handoff is triggered depending on HHO absolute threshold.

ABSTHRS (MAHHO Absolute Threshold)

[Description]

If the strength of the soft handoff target active set is lower than TADDMAHHO and the strength of the mobile assisted hard handoff target active set is higher than the MAHHO absolute threshold, the mobile assisted hard handoff is triggered.

[Type]


[Range and Units]


[Operating Range]

-10 to -28


-16

[Setting Tradeoffs]

The smaller the value of this parameter (for example, smaller than -28), the lower the pilot strength for triggering the mobile assisted hard handoff in the target cell is. In this case, the mobile assisted hard handoff can be easily triggered. However, because the signals in the target cell may be poor, it is hard for the MS to capture the target cell. Thus hard handoff fails.

The greater the value of this parameter (for example, larger than -10), the higher the pilot strength for triggering the mobile assisted hard handoff in the target cell is. In this case, it is easier for the MS to capture a channel of the target cell during mobile assisted hard handoff, but the mobile assisted hard handoff cannot be easily triggered.

RELTHRS (MAHHO Relative Threshold)


2007-7-25


[Description]

When the pilot strength of the mobile assisted hard handoff target active set is higher than that of the soft handoff target active set, the mobile assisted hard handoff is triggered.

[Type]


[Range and Units] 0–63, in the unit of 0.5 dB, that is, 0–31.5 dB [Operating Range]

2 to 16


8

[Setting Tradeoffs]

The greater the value of this parameter, the stronger the signals in the target cell for hard handoff is higher than that in the source cell, so the easier for the MS to capture a forward channel in the target cell. However, because the signals in the source cell are poor during hard handoff, the MS cannot receive the HDM of the source cell.

The smaller the value of this parameter, the easier for the hard handoff to be triggered. In this case, the signals on the forward channels of the source cell side do not deteriorate dramatically, which is good for the MS to receive the HDM of the original cell, but the MS may not capture a forward channel of the source cell.

STRTSRCHTHRS (MAHHO Start Search Threshold)

When mobile assisted hard handoff is used, BSC sends the CFSRQM to the MS to start candidate frequency search. This parameter determines the time for BSC to send the CFSRQM to the MS. When the pilot strength is lower than this threshold, BSC sends the CFSRQM to the MS to start candidate frequency search.

[Type]


[Range and Units]


[Operating Range]

-16 to -28


-16

[Setting Tradeoffs]

The smaller the value of this parameter (for example, smaller than -28), the lower the actual corresponding physical threshold is. Thus the later the hard handoff search is triggered. Because the link quality of the original cell is rather poor now, the MS cannot necessarily receive the CFSQM. In this case, the frequency search cannot be started normally and the time for triggering hard handoff is delayed.


2007-7-25


The greater the value of this parameter (for example, smaller than -16), the earlier for the inter-frequency search to be started is when the pilot strength of candidate frequency is good. Because inter-frequency may break the conversation, the link quality of serving frequency may be affected.

STOPSRCHTHRS (MAHHO Stop Search Threshold)

[Description]

When mobile assisted hard handoff is used, BSC will send a CFSQM to the MS to start candidate frequency search, but the inter-frequency has a negative effect on conversation quality. Therefore, when the pilot strength of the active set becomes good, BSC must send a CFSCNM to the MS to stop the inter-frequency search. As a result, this parameter determines the time for the BSC to send the CFSCNM to the MS to stop the inter-frequency search. When the pilot strength of the active set is higher than this threshold, the BSC will send the CFSCNM to stop the inter-frequency search.

[Type]


[Range and Units]


[Operating Range]

-12 to -24


-12

[Setting Tradeoffs]

The smaller the value of this parameter (for example, smaller than -24), the lower the actual corresponding physical threshold is. Thus it is easier for the hard handoff search to be stopped, which reduces the times for the MS to perform inter-frequency search. In this case, however, the inter-frequency search cannot be triggered in time.

The greater the value of this parameter (for example, larger than -12), the higher the actual corresponding physical threshold is. Thus it is harder for the hard handoff search to be stopped. In this case, frequent inter-frequency search may affect conversation quality, but the frequent inter-frequency search is good for the MS to perform real-time measurement of candidate frequency.

4.7 Handdown HHO Parameters

[Command name]

MOD HNDDWN (Base Station controller Management \ Configuration Management \ Algorithm Configuration \ Modify HANDDOWN Hard Handoff Parameters)

ABSTHRS (Handdown HHO EC/IO Intensity Absolute Threshold)

[Description]


2007-7-25


When the pilot strength of the soft handoff target active set is lower than this threshold and the minimum RTD of the pilots in the current active set is larger than T_HHO_HAND_DOWN_RTD, the handdown hard handoff is triggered.

[Type]


[Range and Units]


[Operating Range]

-10 to -28


-16

[Setting Tradeoffs]

The smaller the value of this parameter (for example, smaller than -28), the lower the actual corresponding threshold is. Thus the later for the handdown hard handoff is triggered. For a dual-carrier network, the coverage area of upper later cells is larger, so heavier traffic volume can be absorbed. If the handdown hard handoff is not triggered in time, however, the signals on the source channel link may fade dramatically. In this case, the MS cannot receive the HDM sent on the source channel. In addition, if the handdown hard handoff is not triggered in time, the signal quality of lower layer target cells for handdown hard handoff cannot be guaranteed. In this case, it is hard for the MS to access the target cell. However, this problem can be solved to some extent through multi-target handdown hard handoff technology.

The greater the value of this parameter (for example, larger than -10), the higher the actual corresponding physical threshold is. Thus the handdown hard handoff is triggered earlier. In this case, the signal quality of the lower layer target cell for handdown hard handoff is good, which is good for the MS to access the target cell. For a dual-carrier network, however, the coverage area of upper layer cells is small, so the upper layer cells cannot absorb traffic effectively.

MAXRTD (Handdown HHO Max. Loop Delay Threshold)

[Description]

If the pilot strength of the soft handoff target active set is lower than T_HHO_HAND_DOWN_ABS_THRESH, and the minimum RTD of the pilots of the current active set is larger than the value of this parameter, the handdown hard handoff is triggered.

RTD refers loop delay, which indicates the distance between the BTS and MS. However, the RTD sometimes is not accurately calculated due to multi-path effect and soft handoff. Each chip is equal to about 244 meters.

[Type]


[Range and Units]

0-65535, in the unit of chip


2007-7-25


[Operating Range]

0-80


15

[Setting Tradeoffs]

The greater the value of this parameter, the larger the distance between the hard handoff band and the source cell is and the later for the MS to perform hard handoff. In this case, the upper layer cells of a dual-band network can absorb heavier traffic. However, the signal quality of the target cell cannot be guaranteed.

The smaller the value of this parameter, the smaller the distance between the hard handoff band and the source cell is and the earlier for the MS to perform hard handoff. In this case, the signal quality of the target cell is good. From the perspective of radio signals, they are helpful for the MS to access the target cell. However, the upper layer cells may not absorb traffic, so the traffic load of lower layer cells is heavy.

4.8 Direct HHO Parameters

[Command name]

MOD DRCT (Base Station controller Management \ Configuration Management \ Algorithm Configuration \ Modify Direct Hard Handoff Parameters)

ABSTHRS (Direct HHO EC/IO Strength Absolute Threshold )

[Description]

When the pilot strength of the soft handoff target active set is lower than this threshold, and the minimum RTD of the current active set is higher than T_HHO_DIRECT_RTD, the direct hard handoff is triggered.

[Type]


[Range and Units]


[Operating Range]

-10 to -28


-16

[Setting Tradeoffs]

The smaller the value of this parameter (for example, smaller than -28), the lower the actual corresponding physical threshold is. Thus the later the direct hard handoff is triggered, but the signals of source channel links will fade dramatically, so the MS cannot receive the HDM sent on the source channel and the hard handoff fails.


2007-7-25


The greater the value of this parameter (for example, larger than -10), the higher the actual physical threshold is. Thus the direct hard handoff is triggered earlier, which is helpful for the MS to receive the HDM sent on the source channel, but the coverage area of the original cell is small.

MAXRTD (Direct HHO Max. Loop Delay Threshold)

[Description]

When the pilot strength of the soft handoff target active set is lower than T_HHO_DIRECT_ABS_THRESH, and the minimum RTD of the current active set is higher than the direct HHO max. loop delay threshold, the direct hard handoff are is triggered. For the meaning of the RTD, see the MAXRTD (Handdown HHO Max. Loop Delay Threshold).

[Type]


[Range and Units]

0-65535, in the unit of chip

[Operating Range]

0 to 80


15

[Setting Tradeoffs]

The greater the value of this parameter, the larger the distance between the hard handoff band and the source cell is. Thus the later the hard handoff is triggered.

The smaller the value of this parameter, the smaller the distance between the hard handoff band and the source cell is. Thus the earlier the hard handoff is triggered.

4.9 Pilot Beacon HHO Parameters

[Command name]

MOD HHOBPLT (Base Station controller Management \ Configuration Management \ Algorithm Configuration \ Modify Pilot Beacon Hard Handoff Parameters)

TADDHHOBPLT (Pilot Beacon HHO Serving Carrier Threshold)

[Description]

When the pilot strength of the soft handoff target active set is lower than this threshold, and the pilot strength of the pilot beacon hard handoff target active set is higher than T_HHO_PILOT_BEACON_ABS_THRESH, the pilot beacon hard handoff is triggered.

[Type]


2007-7-25



[Range and Units]


[Operating Range]

-14 to -32


-22

[Setting Tradeoffs]

The smaller the value of this parameter (for example, smaller than -32), the pooer the signals of the source cell is when the MS performs hard handoff from the target cell to the source cell. Thus the later the hard handoff is triggered. In this case, it is hard for the MS to receive the HDM sent by the BTS at the source side, so the hard handoff may fail.

The greater the value of this parameter (for example, larger than -14), the triggering conditions of hard handoff are easily met when the MS performs hard handoff. In this case, the hard handoff is triggered mainly depending on hard handoff absolute threshold.

THHOBPLTABSTHRS (Pilot Beacon HHO Absolute Threshold)

[Description]

When the pilot strength of the soft handoff target active set is lower than T_ADD_HHO_PILOT_BEACON, and the pilot strength of the pilot beacon hard handoff target active set is higher than this pilot beacon HHO absolute threshold, the pilot beacon hard handoff is triggered.

[Type]


[Range and Units]


[Operating Range]

-10 to -28


-18

[Setting Tradeoffs]

The smaller the value of this parameter (for example, smaller than -28), the lower the pilot strength for triggering the pilot beacon hard handoff in the target cell is. In this case, the pilot beacon hard handoff can be easily triggered. However, because the signals of the target cell may be poor, it is hard for the MS to capture the target cell. Thus hard handoff fails.

The greater the value of this parameter (for example, larger than -10), the higher the pilot strength for triggering the pilot beacon hard handoff in the target cell is. In this case, it is


2007-7-25


easier for the MS to capture the channels of the target cell when pilot beacon hard handoff is performed, but the same-frequency hard handoff cannot be easily triggered.

THHOBPLTRELTHRS (Pilot Beacon HHO Relative Threshold)

[Description]

When the pilot strength of the pilot beacon hard handoff target active set is THHOBPLTRELTHRS higher than that of the soft handoff target active set, the pilot beacon hard handoff is triggered.

[Type]


[Range and Units]


[Operating Range]

2 to 16


5

[Setting Tradeoffs]

The greater the value of this parameter, the better the signals of the target cell than that of the source cell when hard handoff is performed. Thus the easier for the MS to capture the forward channels of the active set is. However, because the signals of the source cell are poor during the hard handoff, the MS cannot receive the HDM of the source cell.

The smaller the value of this parameter, the easier the hard handoff is triggered, which stops the signals of of the forward channels of the source cell from fading dramatically, and is helpful for the MS to receive the HDM of the source cell. In this case, however, the MS cannot necessarily capture the forward channels of the target cell.

4.10 Pilot Measurement Request Parameters

[Command name]

MOD PMRO (Base Station controller Management \ Configuration Management \ Algorithm Configuration \ Modify Pilot Measurement Request Parameters)

MINPWRTHRS (Pilot Min Rx Power Threshold)

[Description]

The threshold of the total received power(Ec) of the pilots in the Active Set.. When BSC sends the PERIODICAL PILOT MEASUREMNT REQUEST ORDER (PPMRO) to the MS and the field ORDQ in this order is not set to 11111111, the MS starts to measure periodically the sserving frequency pilot. The MS judges whether to report the PPSMM


2007-7-25


to BSC periodically according to this pilot min Rx power threshold and the MIN_PILOT_EC_IO_THRESH.

[Type]

It is an Um interface parameter (PPMRO).

[Range and Units]

0 to 31 (the unit is related to the actual power. See the [Setting Tradeoffs])

[Operating Range]

0 to 31


31

[Setting Tradeoffs]

If the MS does not intend to judge whether to report the PPSMM according to the total received power of the actives set pilot, the value of this parameter must be set to 11111 (that is, 31).

If the MS intends to send the PPSMM when the total received power of the active set pilot is lower than pilot_ec_thresh, it does not report the PPSMM when the total received power of the active set pilot is higher than pilot_ec_thresh. In this case, the value of this

parameter is set to .

MINECIOTHRS (Pilot Min Rx EC/IO Threshold )

[Description]

It is the total EC/IO threshold of the pilots in active set. When BSC sends the PERIODICAL PILOT MEASUREMNT REQUEST ORDER (PPMRO) to the MS and the field ORDQ in this order is not 11111111, the MS starts to measure periodically the serving frequency pilot.

The MS judges whether to report the PPSMM to BSC periodically according to this threshold and the MIN_PILOT_EC_IO_THRESH.

[Type]


[Range and Units]


[Operating Range]

-14 to -28, and -31


-31

[Setting Tradeoffs]


2007-7-25


If the MS does not intend to judge whether to report the PPSMM according to the total EC/IO of the actives set pilot, the value of this parameter must be set to 11111 (that is, 31).

If the MS intends to send the PPSMM when the total EC/IO of the pilots in active set is lower than pilot_streng_thresh, it does not report the PPSMM when the total EC/IO of the pilots in active set is higher than pilot_streng_thresh. In this case, the value of this parameter is set to .

INCLSETPT (Eb/Nt Setpoint Included Flag in PPSMM)

[Description]

It specifies whether the Eb/Nt setpoint information is included in the PPSMM message.

[Type]


[Range and Units]

0 and 1

[Operating Range]

0 and 1


0

[Setting Tradeoffs]

If the MS intends to carry the outloop Eb/Nt setpoint information in the PPSMM, this field is 1; otherwise it is 0.

Generally, this field is 0.

ORDQ (PPMRO Report Period)

[Description]

It indicates the period (in the unit of 80ms) for the MS to report the PPSMM to the BSC.

[Type]


[Range and Units]

1 to 255

(The range is related to INCL_SETPT. For details, see the tradeoff setting of this parmameter)

[Operating Range]

1 to 255

(The range is related to INCL_SETPT. For details, see the tradeoff setting of this parmameter)


2007-7-25



25, that is, 2s

[Setting Tradeoffs]

If the field INCLSETPT is set to 1, the range of this parameter is 1 to 254. If the field INCLSETPT is set to 0, the parameter range is 10 - 126. The smaller the value of this parameter, the more frequent the PPSMM is reported to the BSC. In this case, the BSC can monitor the pilot strength of the active set of the MS, but frequent reports may overload the reverse link. The greater the value of this parameter, the longer the period for the MS to report the PPSMM is, so the signaling load is not heavy. In this case, however, the BSC cannot monitor the pilot strength of the active set of the MS.

Chapter 5 Channel Assignment

5.1 Channel Information

[Command name]

MOD CHINF (Base Station Controller Management\Configuration Management\Algorithm Configuration\Modify Channel Information)

CARRASSGNVAL (Carrier Assign Threshold)

[Description]

In the case of call admission judgment, if the carrier hard assignment function is enabled and sector load (that is, forward load, see FWDLODWGT (Forward Load Weight) is less than the threshold, the call is assigned to the carrier. Otherwise, according to the algorithm, the proper carriers from all the carriers in the cells are re-assigned.

[Type]


[Range and Units]

0–255, in the unit of percentage

[Operating Range]

0–255


80

FBASICVAL (Forward Basic Admission Threshold)

[Description]


2007-7-25


It indicates the admission control threshold allocated by voice service and data service forward FCH.

If the forward load is less than this threshold, the calls, soft handoff and hard handoff are allowed.

[Type]


[Range and Units]


[Operating Range]

0–100


If the recommended value is 100%, it means that forward admission control function is disabled.

This parameter cannot be modified.

[Setting Tradeoffs]

The greater the value of this parameter, the more the calls accessed. However, the system breaks down easier.

FSOFTVAL (SHO Forward Admission Threshold)

[Description]

It indicates the forward admission threshold when the soft handoff branch is established.

[Type]


[Range and Units]


[Operating Range]

0–100


If the recommended value is 100%, it means that forward admission control function is disabled.

[Setting Tradeoffs]

None

REVMAXUSER (Max Number of Equivalent Reverse Channels)

[Description]

It indicates max. number equivalent reverse channels threshold.


2007-7-25


The reverse load measurement is inaccurate, so the admission control is performed based on the number of equivalent channels. In the case of reverse admission control, the sum of current number of equivalent channels and that to be assigned is calculated.

If the sum is greater than the value of this parameter, new calls are prohibited from accessing.

If the sum is less than the value of this parameter, new calls can be accessed.

[Type]


[Range and Units]

0–255, in the unit of the number of equivalent reverse channels

[Operating Range]

0–75


75

[Setting Tradeoffs]

A smaller value of this parameter can help the system keep stable, at the risk of the system capacity.

A larger value of this parameter can help the system capacity increase, but the system is instable easily.

When the capacity of voice service or data service is tested, the value of this parameter can be increased, such as 255.

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.

It is used for reverse admission of data service.

[Type]


[Range and Units]

0–255, in the unit of 0.1

[Operating Range]

0–255


25

[Setting Tradeoffs]


2007-7-25


If the value of this parameter is too great, the number of users served by reverse data service of the system is reduced, but the system keeps stable easier.

If the value of this parameter is too small, there are more users, but the system keeps stable hardier.

If the capacity of reverse data service is tested, the value of this parameter can be reduced.

E2XDAT EQU (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.

It is used for the reverse admission of data service.

[Type]


[Range and Units]


[Operating Range]

0–255


40

[Setting Tradeoffs]

See E1XDATEQU (Data Service FCH (1xSCH) Equivalent Channels).

When the capacity of reverse data service is tested, the value of this parameter can be reduced.

E4XDATEQU (Data Service 4XSCH Equivalent Channels)

[Description]



[Type]


[Range and Units]

0 to 255, in the unit of 0.1

[Operating Range]

0 to 255


2007-7-25



75


[Setting Tradeoffs]




[Description]



[Type]


[Range and Units]


[Operating Range]

0 to 255


130


[Setting Tradeoffs]



E16XDATQU (Data Service 16XSCH Equivalent Channels)

[Description]



[Type]


[Range and Units]


2007-7-25



[Operating Range]

0 to 255


220


[Setting Tradeoffs]




[Description]



[Type]


[Range and Units]


[Operating Range]

0 to 65535


400


[Setting Tradeoffs]



RC1EQU (RC1 Equivalent Voice Channels)

[Description]

RC1 equivalent voice channels are equivalent to RC3 voice call of voice service on a specified carrier.

It is used for reverse admission control.


2007-7-25


[Type]


[Range and Units]


[Operating Range]

0–100


17


[Setting Tradeoffs]

In the case of reverse capacity test, the value of this parameter can be reduced.


[Description]



[Type]


[Range and Units]


[Operating Range]

0–100


21


[Setting Tradeoffs]



[Description]




2007-7-25


[Type]


[Range and Units]


[Operating Range]

0–100


21


[Setting Tradeoffs]


FWDLODWGHT (Forward Load Weight)

[Description]

The forward load weight in the specified carrier is used to estimate the integrated load of hard assignment calculation.

Integrated load=forward load × forward load weight + reverse load ×(100 – forward load weight)/ 100

[Type]


[Range and Units]

0–100, in the unit of 1%

[Operating Range]

0–100


100


Currently, only the forward load is considered into the hard assignment.

[Setting Tradeoffs]

If the forward load is regarded as the main standard of hard assignment, the value of this parameter must be greater than 50%. Otherwise, the value must be less than 50%.

FEPACAVAL (EPACA Resource Available Threshold)

[Description]

It indicates enhanced PACA (EPACA) forward load threshold, and is used for the EPACA function.


2007-7-25


When receiving an origination message or paging response message of MS, the BSC invokes the internal functions and queries the system resources.

If the forward load is higher than the threshold, the BSC returns the cause of “no available resource”, and notifies the MSC. The MSC determines whether to clear the calls for the privileged user.

[Type]


[Range and Units]


[Operating Range]

0–100


90

[Setting Tradeoffs]

Because the load is changeable, if the value of this parameter is too high, the MSC cannot clear the calls, and the privileged users may fail to access the network because of the resource allocation.

If the value of this parameter is too small, the MSC cannot clear the calls, which is bad for the traffic measurement index.

MSPREVASSGNTP (MS protocol revision Priority Type)

[Description]

It indicates that the MS protocol revision type (IS-95 MS or IS-2000 MS) assigned by the carrier is selected at priority after the specified carrier is assigned according to the MS protocol revision type at priority.

For example, if the hard assignment function is enabled, hard assignment is performed based on MS protocol revision type, and P1 is the carrier which IS-2000 MS accesses at priority, the IS-2000 MS is assigned on the P1 at priority whatever carriers the MS originates a call.

Only when the load on the P1 exceeds a threshold, the MS is assigned on other carriers based on the load sharing.

[Type]


[Range and Units]

0–2 0---IS-2000 MS preferred 1---IS-95 MS preferred 2---No difference

[Operating Range]


2007-7-25


0–2


2

[Setting Tradeoffs]

None

SERVASSGNTP (Service Priority Type)

[Description]

It indicates that the service type (voice service or data service) assigned by the carrier is selected at priority after the specified carrier is assigned according to the service type at priority.

For example, if the hard assignment function is enabled, hard assignment is performed based on service type, and P1 is the carrier which voice service accesses at priority, the MS is assigned on the P1 at priority whatever carriers the MS originates a call.

Only when the load on the P1 exceeds a threshold, the MS is assigned on other carriers based on the load sharing.

[Type]


[Range and Units]

0–2 0--- voice service preferred 1---data service preferred 2---No difference

[Operating Range]

0–2


2

[Setting Tradeoffs]

None

5.2 SCH Assignment Parameters

[Command name]

MOD SCH (Base Station Controller Management\Configuration Management\Algorithm Configuration\Modify SCH Assignment Parameters)

TFAC (Physical Channel Transmission Efficiency Factor)


2007-7-25


[Description]

It indicates the efficiency of the valid data transmission on the forward channel and used to adjust the assigned SCH DURATION.

This value is to compensate the effect on the DURATION calculation from the overhead at the protocol layer, that is, forward DURATION = Data to be transmitted (application layer)/ transmission rate (physical layer).

[Type]


[Range and Units]


[Operating Range]

0–100


80


[Setting Tradeoffs]

The value cannot be modified.

NBRINTFFAC (Neighbor Cell Interference Factor)

[Description]

It indicates the capacity effect on the current cell because of the interference from its neighbor cell. It is used for reverse admission control.

It estimates the neighbor cell interference.

Neighbor cell interference= cell load* the interference factor

[Type]


[Range and Units]


[Operating Range]

0–100


0

[Setting Tradeoffs]

It is 0 temporarily.


2007-7-25


SIGDL (SCH Signaling Delay)

[Description]

It indicates the system signaling delay during the SCH assignment.

When the system assigns the SCH, calculate SCH_START_TIME based on the time from SCH assignment request to SCH assignment.

When the RRM fills in some fields of Extended Supplemental Channel Assignment Message, SCH_START_TIME is calculated based on “system time+ SIGDL”.

When the recommended value of SIGDL is 10, it means that the MS starts to send the data at the time of “system time + 10 frames”.

[Type]


[Range and Units]

0–31, in the unit of the number of 20ms frames

[Operating Range]

0–31


10

[Setting Tradeoffs]

If the value of this parameter is too small, the data transmission may fail.

If the value of this parameter is too great, the start time for data transmission is delayed.

In addition, the value affects SCH extension. For details, see Module-level Channel Parameters.

TDL (SCH Transmission Delay)

[Description]

It is not used temporarily.

It determines the DURATION.

Duration =(BufData + DataAcuRate * TransDelay)/(allocated channel rate* physical channel transmission efficiency factor %).

[Type]


[Range and Units]


[Operating Range]

0–100



2007-7-25


64

[Setting Tradeoffs]

If the value of this parameter is too great, the longer the assigned SCH duration is.

FWDCENPLTTHRS (Forward Central Pilot Threshold)

[Description]

The meaning of this parameter is the same as that of CENPLTTHRS (Central Pilot Threshold) in the R02.

When the pilot strength is greater than or equal to FWDCENPLTTHRS/2(dB), the user is located in the central area of pilot, and the maximum SCH rate assigned is 32x.

When the assigned SCH rate is 32X, whether the MS supports the 32x and the forward 32x SCH switch is ON must be considered.

If the switch is OFF, the maximum SCH rate assigned is 16x.

[Type]


[Range and Units]


[Operating Range]

-63–0


-13, that is, -6.5 dB

[Setting Tradeoffs]

Under special conditions, if the assigned SCH does not want to be restricted by the pilot strength, the value of this parameter is modified as -31, that is, -15.5 dB.

FWDTRANPLTTHRS (Forward Transition Pilot Threshold)

[Description]

When the FWDCENPLTTHRS/2(dB) > pilot strength > FWDTRANPLTTHRS/2(dB), the user is located in the transition area and the maximum SCH rate assigned is 8x.

[Type]


[Range and Units]


[Operating Range]

-63–0



2007-7-25


-18, that is, -9 dB

[Setting Tradeoffs]


The value of FWDCENPLTTHRS is greater than that of FWDTRANPLTTHRS.

FWDBDR4XPLTTHRS (Forward Border 4x Pilot Threshold)

[Description]

When the pilot strength < FWDTRANPLTTHRS/2(dB), the user is located in the border area, and the maximum SCH rate assigned is 4x.

At that time, the different SCH rates are subdivided, that is, when FWDTRANPLTTHRS/2(dB) > pilot strength > FWDBDR4XPLTTHRS/2(dB), the maximum SCH rate assigned is 4X.

[Type]


[Range and Units]


[Operating Range]

-63–0


-22, that is, -11dB

[Setting Tradeoffs]


The value of FWDTRANPLTTHRS is greater than that of FWDBDR4XPLTTHRS.

FWDBDR2XPLTTHRS (Forward Border 2X Pilot Strength Threshold)

[Description]

When the pilot strength < FWDTRANPLTTHRS/2(dB), the user is located in the border areas and the maximum SCH rate assigned is 4x.

At that time, different SCH rates are subdivided, that is, when FWDBDR4XPLTTHRS/2(dB)> pilot strength > FWDBDR2XPLTTHRS/2(dB), the maximum SCH rate assigned is 2X.

[Type]


[Range and Units]



2007-7-25


[Operating Range]

-63–0


-26, that is, -13dB

[Setting Tradeoffs]


The value of FWDBDR4XPLTTHRS is greater than that of FWDBDR2XPLTTHR.

FWDBDR1XPLTTHRS (Forward Border 1X Pilot Threshold)

[Description]

When the pilot strength < FWDTRANPLTTHRS/2(dB), the user is located in the border areas and the maximum SCH rate assigned is 4X.

At that time, different SCH rates are subdivided, that is, when FWDBDR2XPLTTHRS/2(dB) > pilot strength > FWDBDR1XPLTTHRS/2(dB), the maximum SCH rate assigned is 1X.

[Type]


[Range and Units]

-63–0, in the unit o 0.5 dB

[Operating Range]

-63–0


-28, that is, -14 dB

[Setting Tradeoffs]


The value of FWDBDR2XPLTTHRS is greater than that of FWDBDR1XPLTTHRS.

REVCENPLTTHRS (Reverse Central Pilot Threshold)

REVTRANPLTTHRS (Reverse Transition Pilot Threshold)

REVBDR4XPLTTHRS (Reverse Border 4X Pilot Threshold)



[Description]


2007-7-25


See the corresponding threshold of forward pilot strength.

The difference is that the former is oriented to forward SCH and the later is oriented to reverse SCH.

[Type]


[Range and Units]


[Operating Range]

-63–0


The recommended values are consistent with that of forward parameters.

[Setting Tradeoffs]

None

R1XDRT (Reverse 1XSCH Duration)

[Description]

It indicates reverse 1X SCH duration.

MSs have a buffer area, but the size of buffer area is too small and cannot reflect the number of data at upper layer.

When the BSC assigns reverse SCH duration, the BSC does not refer to the recommended value of MS. The duration varies with reverse SCH at different rates.

[Type]


[Range and Units]

0–15

[Operating Range]

1–14


14 (5.12s)

[Setting Tradeoffs]

“14” is the maximum value indicating the finite assignment duration.

A greater value of this parameter helps improve the reverse data transmission efficiency. When the SCH rate is low, the value of this parameter must be greater than or equal to 13.

Table 5-1 describes the representation methods of SCH_DURATION.


2007-7-25


Table 5-1 Representation methods of SCH_DURATION

FOR_SCH_DURATION

REV_SCH_DURITION

(binary)

Duration in 20ms

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 duration


[Description]

It indicates reverse 2X SCH duration. See the R1XDRT.

[Type]


[Range and Units]

0–15

The meanings are coded based on the protocols, as shown in Table 5-1.

[Operating Range]

1–14


14 (5.12s)

[Setting Tradeoffs]


2007-7-25





[Description]


[Type]


[Range and Units]

0–15


[Operating Range]

1–14


14 (5.12s)

[Setting Tradeoffs]




[Description]


[Type]


[Range and Units]

0–15


[Operating Range]

1–14


13


2007-7-25


[Setting Tradeoffs]


A greater value of this parameter helps improve the reverse data transmission efficiency. If the data is transmitted within the duration, the resources are wasted. When the SCH rate is high, the value of this parameter must be 13.

If the demonstration or compared test is conducted, the value of this parameter must be 14.


[Description]


[Type]


[Range and Units]

0–15


[Operating Range]

1–14


13

[Setting Tradeoffs]


A greater value of this parameter helps improve the reverse data transmission efficiency. If the data is transmitted within the duration, the resources are wasted. When the SCH rate is high, the value of this parameter must be 13.

If the demonstration or compared test is conducted, the value of this parameter must be 14.


[Description]


[Type]


[Range and Units]

0–15


2007-7-25



[Operating Range]

1–14


10

[Setting Tradeoffs]


A greater value of this parameter helps improve the reverse data transmission efficiency.

If the data is transmitted within the duration, the resources are wasted. If the demonstration or compared test is conducted, the value of this parameter must be 14.

FWDMINDRT (Min. Duration of Forward SCH)

[Description]

It indicates the minimum assigned duration of forward SCH.

The protocols specify that the minimum duration is 1 frame. During once assignment of SCH, the signaling exchange and SCH synchronization of MS, BTS and FMR require six to ten 20ms frames.

If the Duration is too short, the processing overhead of SCH assignment is greater than the rate gain occurred. Therefore, the BSC sets the minimum duration of forward SCH.

This parameter is effective only when forward SCH extension is disabled.

[Type]


[Range and Units]


[Operating Range]

1–255


8

[Setting Tradeoffs]

When the value of this parameter is set, the delay overhead is SCH assignment.

Generally, the value of this parameter cannot be less than 8.

FWDMAXDRT (Max. Duration of Forward SCH)

[Description]


2007-7-25


It indicates the maximum assigned duration of forward SCH.

It takes effect only when the forward SCH extension is disabled.

[Type]


[Range and Units]

1–255, in the unit of 20ms frames

[Operating Range]

1–255


64 frames

[Setting Tradeoffs]

A greater value of this parameter can help the MS improve SCH transmission efficiency in good environments, but does not facilitate the SCH transmission in the mobility state.

The defaulted value considers a tradeoff between the transmission in the static state and dynamic state.

When the MS is in the static state, the value of this parameter is 255.

FWD32XMINDRT (Min. Duration of Forward 32XSCH)

[Description]

It indicates the minimum assigned duration of forward 32X SCH.


[Type]


[Range and Units]

0–15


[Operating Range]

1–14


10

[Setting Tradeoffs]


A greater value of this parameter helps improve the reverse data transmission efficiency.


2007-7-25


If the data is transmitted within the duration, the resources are wasted. If the demonstration or compared test is conducted, the value of this parameter must be 14.

FWD32XMAXDRT (Max. Duration of Forward 32X SCH)

[Description]

It indicates the maximum duration of forward 32X SCH.


[Type]


[Range and Units]

0–15


[Operating Range]

1–15


15, that is, indefinite duration

[Setting Tradeoffs]

Whether to reach forward/reverse 32X SCH are controlled by the switch and must be supported by the MSs.

Generally, it is used in the compared test.

FWDBDR1XVAL (Forward Border 1X SCH Admission Valve)



[Description]

They indicate assigned forward 1X, 2X and 4X SCH admission valves.

The load increases after the SCH is assigned, so the higher the rate, the less the value of the admission valve parameter.

[Type]


[Range and Units]

0–100, in the unit o percentage

[Operating Range]

0–100


2007-7-25



1X, 2X and 4X correspond to 68, 63, and 54 respectively.

[Setting Tradeoffs]

None

FWDMID1XVAL (Forward Transition 1X SCH Admission Valve)




[Description]

They indicate assigned forward 1X, 2X, 4X and 8X SCH admission valves.


[Type]


[Range and Units]


[Operating Range]

0–100


1X, 2X, 4X, and 8X correspond to 72, 68, 63, and 54 respectively.

[Setting Tradeoffs]

None

FWDCEN1XVAL (Forward Central 1X SCH Admission Valve)






[Description]

They indicates the assigned forward 1X, 2X, 4X, 8X, 16X, and 32X SCH admission valves.


[Type]


2007-7-25



[Range and Units]


[Operating Range]

0–100


1X, 2X, 4X, 8X, 16X and 32X correspond to 74, 73, 71, 68, 62 and 60 respectively.

[Setting Tradeoffs]

None

SCHINIPWRHOOFFSET (SCH Initial Power Handoff Offset)

[Description]

Based on transmit power of FCH, the SCH initial power is estimated when channel rate, target FER, channel coding mode, and handoff state are considered.

When the effect of handoff state is considered, if the FCH and SCH have the same active set in size, the power correction of handoff factor is not required.

When the active set of SCH is less than that of FCH, the power correction of handoff factor is required. The soft handoff power offsets of SCH vary with the RC and coding modes.

This parameter specifies handoff offset to compensate the difference.

[Type]


[Range and Units]

-128 to 127

[Operating Range]

-128 to 127


0

[Setting Tradeoffs]

None

SCHINIPWRADJUST (SCH Initial Adjust)

[Description]

Based on transmit power of FCH, the SCH initial power is estimated when channel rate, target FER, channel coding mode, and handoff state are considered.

This parameter compensates the deviations. During the implementation, the initial power is set based on actual conditions.


2007-7-25


[Type]


[Range and Units]

-128 to 127

[Operating Range]

-128 to 127


0

[Setting Tradeoffs]

None

5.3 Module-level Channel Parameters

[Command name]

MOD MCHM (Base Station Controller Management\Configuration Management\Algorithm Configuration\Modify Channel Management Module-level Parameters)

ACMACRODIVSW (Access Macro Diversity Switch)

[Description]

It controls whether to enable access macro diversity function.

[Type]


[Range and Units]

0 and 1

0—Off and 1---ON

[Operating Range]

0 and 1


1

[Setting Tradeoffs]

The function is enabled to improve the access success rate.

MBRANUMAC (Max. Number of Access Macro Diversity Branches)


2007-7-25


[Description]

It indicates the maximum number of access macro diversity branches.

[Type]


[Range and Units]

1–6, in the unit of number of branch

[Operating Range]

1–6


3

[Setting Tradeoffs]

If the value of this parameter is too great, the gain caused by the high access success rate is not large and some resources are wasted.

MBRANUMINTERHHO (Max. Number of Inter-BSC HHO Branches)

[Description]

It indicates the maximum number of inter-BSC hard handoff macro diversity branches.

[Type]


[Range and Units]

1–6, in the unit of branch

[Operating Range]

1–6


6

[Setting Tradeoffs]

Because selecting the active set at target side is not specific in the case of hard handoff, the value of this parameter can be great to improve the access success rate of hard handoff.

MBRANUMINTRAHHO (Max. Number of Intra-BSC HHO Branches)

[Description]

It indicates the maximum number of intra-BSC hard handoff macro diversity branches.

[Type]



2007-7-25


[Range and Units]


[Operating Range]

1–6


6

[Setting Tradeoffs]


MBRANUMINTRAHHO (Max. Number of Intra-BSC HHO Branches)

[Description]

It indicates the maximum number of intra-BSC hard handoff macro diversity branches.

[Type]


[Range and Units]


[Operating Range]

1–6


6

[Setting Tradeoffs]


DSERVALWHFTYPE (Data Call Supported HO Type)

[Description]

It indicates whether the soft handoff or hard handoff is allowed for the data services.

This parameter is effective on the FCH only and indicates whether the soft handoff or hard handoff is allowed for data service, and it is different from the soft handoff of SCH.

In the R03 and later, there is a dedicated switch used for enabling or disabling the soft handoff of SCH. Currently, this function is disabled.

[Type]



2007-7-25


[Range and Units]

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 performed.

[Operating Range]

0–3


0

[Setting Tradeoffs]

None

DSERVPWRRPTFRM (Frames of data service measurement report)

[Description]

For the data service, the MS must report periodically a PMRM to monitor the change of pilot strength on a realtime basis.

This parameter indicates that the MS reports a PMRM after the total number of frame exceeds 2^( DSERVPWRRPTFRM /2)* 5.

[Type]

It is an Um interface parameter (SPM/MCRRPM/PCNPM).

[Range and Units]

0–15

[Operating Range]

0–3


2, that is, if the total number of frames is 10, the MS reports a PMRM.

It is not modified.

[Setting Tradeoffs]

If the value of this parameter is too small, the MS may reports a PMRM frequently and the reverse link quality is affected or the CPU load of SPU increases.

If the value of this parameter is too great, monitoring the change of pilot strength on a realtime basis is hard.

DSERVPWRRPTDEY (Data Service Measurement Report Delay)

[Description]


2007-7-25


For the data service, the MS must report periodically a PMRM to monitor the change of pilot strength on a realtime basis.

This parameter indicates that the MS re-calculates the number of frames after the MS reports a PMRM and DSERVPWRRPTDEY * 4 frames are delayed. That is, the cycle for reporting the PMRM is [2^ (DSERVPWRRPTFRM /2)* 5 + DSERVPWRRPTDEY * 4] frames.

[Type]

It is an Um interface parameter (SPM/MCRRPM/PCNPM).

[Range and Units]

0–31, in the unit of 4 frames

[Operating Range]

0–31




[Setting Tradeoffs]

None

SPT16XREVSCH (16X R-SCH Support Switch)

[Description]

It indicates the R-SCH supported maximum rate is 16X or 8X.

When the switch is ON, the maximum rate is 16X.

[Type]


[Range and Units]

0 and 1 0---the maximum rate is 8X. 1---the maximum rate is 16X.

[Operating Range]

0 and 1


1

[Setting Tradeoffs]

None

SCHRELBYFER (FER Based SCH Release Switch)


2007-7-25


[Description]

When the switch is ON, it indicates that whether the switch allows to release the SCH according to SCH-based FER.

[Type]


[Range and Units]

0–3 0---Off 1---FWD_ON 2---REV_ON 3---BOTH_ON

[Operating Range]

0–3


0

[Setting Tradeoffs]

None

SCHRELBYPILTSTSW (Pilot Strength Based SCH Release Switch)

[Description]

When the switch is ON, it indicates whether the switch allows to release the SCH according to pilots in active set strength-based change.

[Type]


[Range and Units]


[Operating Range]

0–3


0

[Setting Tradeoffs]

None


2007-7-25


SCHRELBYLOADSW (Overload Based SCH Release Switch)

[Description]

When the switch is ON, it indicates whether the switch allows to release the SCH according to the overload based change.

[Type]

It is an algorithm parameter.

[Range and Units]


[Operating Range]

0–3


0

[Setting Tradeoffs]

It should be OFF when the SCH supports the soft handoff.

SCHRELFRMDEL (Remained Frames Threshold for SCH Release)

[Description]

It indicates remained frames threshold in the burst when the SCH active release judgment is performed.

When the number of remained frames in the burst is less than the threshold, the SCH active release judgment is not performed because all the remained frames may be processed and released normally before the SCH active release is performed. The SCHs are not released in time and the signaling operations do not take effect.

[Type]


[Range and Units]


[Operating Range]

0–255


10

[Setting Tradeoffs]

The delay exists from the release judgment to the specific processing.


2007-7-25


If the value of this parameter is too small, the signaling operations do not take effect. If the value of this parameter is too great, SCH cannot be released in time.

SCHRELTALFRMTHR (Total Frames Threshold for SCH Release)

[Description]

When the SCH active release judgment is performed based on the FER, the number of measured frames reaches the threshold. See SCHRELBYFRSW (FER Based SCH Release Switch).

[Type]


[Range and Units]


[Operating Range]

0–255


10

The recommended value can be less than 10, but the verification is required.

[Setting Tradeoffs]

If the value of this parameter is too small, the FER from the PMRM cannot indicates the real error frames.

SCHRELFERFACTOR (FER Factor for SCH Release)

[Description]

It indicates the multiple of FER to the target FER, that is, fade factor of communication quality.

If the FER exceeds (1 + SCH fade factor/10)×target FER, reverse SCH release is initiated. This value is 10 times greater than the actual one. For example, 15 indicates 1.5 times. See SCHRELBYFRSW (FER Based SCH Release Switch).

[Type]


[Range and Units]

0–255, in the unit of 1/10 times

[Operating Range]

0–255


70


2007-7-25


[Setting Tradeoffs]

None

SCHRELBRANSTREDIFF (Pilot Strength Difference Threshold for SCH Release)

[Description]

If the pilot strength difference of best two branches where the SCH is located is greater than the threshold, the SCH is released actively. See SCHRELBYPILSTSW (Pilot Strength Based SCH Release Switch).

[Type]


[Range and Units]


[Operating Range]

0–16


4

[Setting Tradeoffs]

If the SCHRELBYPILSTSW is ON, the SCH release is initiated based on the threshold whatever conditions, including the SCH soft handoff.

SCHRELLDRELATHRESH (Overload Relative Threshold for SCH Release)

[Description]

When the load is SCHRELLDRELATHRESH higher than basic admission threshold, the SCH release is initiated. See SCHRELBYLOADSW (Overload Based SCH Release Switch).

[Type]


[Range and Units]


[Operating Range]

0–100


2

[Setting Tradeoffs]

None


2007-7-25


SCHRELDTXDUR (DTX Duration)

[Description]

It indicates the duration of reverse SCH discontinuous transmission (DTX).

If the MS stops sending the data on the reverse SCH and does not resends the data within the SCHRELDTXDUR, the MS releases automatically the reverse SCH.

This parameter optimizes the R-SCH resources. If the value of this parameter is 15, this function is disabled.

[Type]

It is an Um interface parameter (SCAM/ GHDM/ ESCAM).

[Range and Units]

0–15

For the representation method, see Table 5-1.

[Operating Range]

0–15


9

[Setting Tradeoffs]

When the reverse data services are demonstrated, the value of this parameter is 15.

SCHRELSUMRATE (SCH Release Rate Sum Based Overload)

[Description]

When the SCH release is initiated based on the load, the SCH release rate must be accumulated.

This parameter specifies the minimum accumulated rate for SCH release. For example, the recommended value is 4, that is, when the rates of SCHs are 2x, the two 2x SCHs must be released at one time and the total rate of SCHs are 2x. See SCHRELBYLOADSW (Overload Based SCH Release Switch).

[Type]


[Range and Units]

0–255, in the unit of SCH rate

[Operating Range]

0–255


4

[Setting Tradeoffs]


2007-7-25


None

RADRESINSMAXPLTNUM (Max. Number of Radio Resource Inspect)

[Description]

It indicates the maximum number of carriers inspected by radio resources.

[Type]


[Range and Units]

0–255, in the unit of the number of carriers

[Operating Range]

0–255


10


[Setting Tradeoffs]

If the value of this parameter is too great, the CPU load is too heavy. Therefore, this value is defaulted.

HARDASSIGNTYPE (Priority Assignment Type)

[Description]

It is a parameter related to hard assignment.

When the hard assignment function is enabled, the parameters must be configured correspondingly to specify the standard when the hard assignment selects the carriers. For example, the hard assignment is performed based on MS protocol revision (IS-95 MS or I-2000 MS) or call service type (voice service or data service).

[Type]


[Range and Units]

0–3 0---Data calls are assigned on the carriers for data services at preferred. 1---Voice calls and data calls are assigned respectively preferred. 2---Hard assignment is performed based on MS protocol revision. 3---Hard assignment is not performed based on MS protocol revision and service

type. [Operating Range]

0–3



2007-7-25


3

[Setting Tradeoffs]

The parameters are configured based on user requirements.

FWDSCH32XSW (Forward 32X SCH Switch)

[Description]

It indicates forward 32x SCH switch.

When the switch is ON, the maximum rate of forward SCH allocation is 32x. 32x is realized through the 128-order WALSH in the RC4.

[Type]


[Range and Units]

0 and 1 0---The maximum rate is 16x. 1---The maximum rate is 32x.

[Operating Range]

0 and 1


0

[Setting Tradeoffs]

None

REVSCH32XSW (Reverse 32X SCH Switch)

[Description]

It indicates the reverse 32x SCH switch.

When the switch is ON, the maximum rate of reverse SCH allocation is 32x.

[Type]


[Range and Units]

0 and 1

0—Off and 1--On

[Operating Range]

0 and 1


0

[Setting Tradeoffs]


2007-7-25


None

FWDSCHSHOSW (Forward SCH Soft Handoff Switch)

[Description]

It controls whether to enable the soft handoff of forward SCH.

[Type]


[Range and Units]

0 and 1

0—Off and 1---ON

[Operating Range]

0 and 1


0

[Setting Tradeoffs]

None

REVSCHSHOSW (RSCH Soft Handoff Switch)

[Description]

It controls whether to enable the soft handoff of reverse SCH.

[Type]


[Range and Units]

0 and 1

0—Off and 1---ON

[Operating Range]

0 and 1


0

[Setting Tradeoffs]

None

FWDSASTHR (FSCH Soft Handoff Initial Threshold)


2007-7-25


[Description]

When forward SCH selects the active set, whether a branch is added to the SCH active set is based on the comparison between the decision variable and the value of this parameter.

The decision variable is composed of forward link weight and reverse link weight. The forward link weight is measured by the forward pilot strength, and the reverse link weight is measured by the reverse pilot strength.

[Type]


[Range and Units]

-6300–0, in the unit of 1/200 dB

[Operating Range]

-6300–0


-1200, that is, -6 dB


[Setting Tradeoffs]

None

FWDSASMAXNUM (FSCH Soft Handoff Max. Branch Number)

[Description]

It indicates the maximum number of branches in the target active set of forward SCH soft handoff.

[Type]

It is internal BSC algorithm parameter.

[Range and Units]

1–6

[Operating Range]

1–6


3

It should not be modified. .

[Setting Tradeoffs]

If the value of this parameter is too great, the SCH soft handoff ratio increases, too many forward resources are seized and forward capacity is wasted.


2007-7-25


If the value of this parameter is too small, the SCH soft handoff ratio decreases, but the soft handoff gain cannot be used properly and the transmission performance of data service may decrease.

FWDSASDYNSW (FSCH Soft Handoff Dynamic Threshold Switch)

[Description]

It indicates whether to allow the dynamic soft handoff of forward SCH.

It is similar to FWDDYNSHO (Forward FCH Dynamic Handoff) and controlled by the BSC.

[Type]


[Range and Units]

0 and 1

0—Off and 1---ON

[Operating Range]

0 and 1


0


[Setting Tradeoffs]

None

FWDSASSLOPE (FSCH Soft Handoff Slope)

[Description]

It indicates the slope value when the forward SCH active set uses the dynamic threshold. The function is similar to that of SOFTSLOPE (Soft Handoff Increasing Slope Ratio). They are used when the BSC judges the dynamic soft handoff. The difference is that FWDSASSLOPE is oriented to the SCH and the SOFTSLOPE is oriented to the FCH.

[Type]


[Range and Units]

0–255

[Operating Range]

0–255


18

[Setting Tradeoffs]


2007-7-25


This parameter is set based on SOFTSLOPE (Soft Handoff Increasing Slope Ratio).

The smaller the value of this parameter, the higher the calculated SCH soft handoff threshold is. However, the transmission performance of data services decreases because the soft handoff gain cannot be used fully.

The greater the value of this parameter, the less the calculated SCH soft handoff threshold is. In this case, neighbor pilots are added to the active set of SCH easier, and the SCH soft handoff ratio increases to ensure the transmission performance, but too many forward powers are used and the forward capacity is reduced.

FWDSASINTERCEPT (FSCH Soft Handoff Intercept)

[Description]

It indicates the intercept value when the forward SCH active set uses the dynamic threshold. The function is similar to that of ADDINTERC (Soft Pilot Adding Intercept). They are used when the BSC judges the dynamic soft handoff. The difference is that FWDSASINTERCEPT is oriented to the SCH and the ADDINTERC is oriented to the FCH.

[Type]


[Range and Units]

-128–127

[Operating Range]

32–38


38

[Setting Tradeoffs]

The smaller the value of this parameter, the less the calculated SCH dynamic soft handoff threshold is. In this case, the SCH soft handoff ratio increases but the forward capacity may be wasted.

The greater the value of this parameter, the higher the calculated SCH dynamic soft handoff threshold is. In this case, the SCH soft handoff ratio decreases but the transmission performance of data service is affected because the soft handoff ratio is not used properly.

FWDSASWEIGHTECIO (FSCH Soft Handoff Threshold EcIo Weight)

[Description]

It indicates the weight of forward link and is used for the variable decision when active set of forward SCH makes decision.

Reverse link weight= 1 – FWDSASWEIGHTECIO value

[Type]


2007-7-25



[Range and Units]


[Operating Range]

0–100


100 (the conditions of reverse link are not considered when active set of forward SCH is selected)

[Setting Tradeoffs]

None

FWDSASADJECIODEALTA (Delta Ec/IO Threshold for FSCH Soft Handoff Adjustment)

[Description]

It indicates the pilot strength threshold adjusted by the branch when the initial active set of forward SCH makes decision.

When forward SCH active set makes decision, it can be adjusted based on rate decision.

[Type]


[Range and Units]


[Operating Range]

-63–0


-12, that is, -6 dB

[Setting Tradeoffs]

None

FWDSASADJRATEDELTA (Data Rate Threshold for FSCH Soft Handoff Adjustment)

[Description]

It indicates the rate difference threshold adjusted by the branch when the initial active set of forward SCH makes decision.

When forward SCH active set makes decision, it can be adjusted based on rate decision.

[Type]



2007-7-25


[Range and Units]

0–63

[Operating Range]

0–4

The corresponding rates are: 0---1X 1---2X 2---4X 3---8X 4---16X


1, that is, the difference of rate indexes is 1.

[Setting Tradeoffs]

None

REVSASTHR (RSCH Soft Handoff Initial Threshold)

[Description]

It indicates the threshold for reverse SCH active set decision.

When the active set of reverse SCH makes decision, whether a branch is added to the active set of reverse SCH is based on the comparison between decision variable of reverse link and the parameter.

The reverse links are judged by the reverse pilot strength.

[Type]


[Range and Units]


[Operating Range]

-255–0


-24, that is, the whole active set of FCH is selected as that of SCH


[Setting Tradeoffs]

None

REVSASMAXNUM (RSCH Soft Handoff Max. Leg Number)

[Description]


2007-7-25


It indicates the maximum number of permitted branches of reverse SCH active set.

[Type]


[Range and Units]

1–6

[Operating Range]

1–6


3


[Setting Tradeoffs]

If the value of this parameter is too great, the SCH soft handoff proportion increases, too many forward resources are seized and the forward capacity is wasted.

If the value of this parameter is too small, the SCH soft handoff proportion decreases, but soft handoff gain cannot be used properly and the transmission performance of data service may be reduced.

SCHTADD (SCH Soft Handoff TADD)

[Description]

It defines a precondition for the BSC adding the branches in FCH active set to SCH active set. If the precondition is satisfied, the active sets of forward and reverse SCHs also must make decision.

[Type]


[Range and Units]

-63–0, in the unit of -0.5dB

[Operating Range]

-24 to -28


-28

[Setting Tradeoffs]

None

SCHEXTSW (SCH Extension Switch)

[Description]

It controls whether to enable SCH extension function.


2007-7-25


[Type]


[Range and Units]

0 (OFF) and 1 (ON)

[Operating Range]

0 and 1


1

[Setting Tradeoffs]

None

SCHEXTDURATION (SCH Extension Duration)

[Description]

It indicates duration of each burst of specified SCH extension.

[Type]


[Range and Units]

4–14


[Operating Range]

4–14




[Setting Tradeoffs]

None

FWDSCHEXTOVERLAP (Forward SCH Extension Overlap)

[Description]

It indicates expected overlap duration between neighbor bursts of specified forward SCH extension.

[Type]


[Range and Units]



2007-7-25


[Operating Range]

0–31




[Setting Tradeoffs]

The greater the value of this parameter, the more the two neighbor durations are overlapped. The efficiencies of durations and the forward SCH extension are reduced.

If the value of this parameter is 0, two neighbor durations are not overlapped. The durations and forward SCH extension are fully used.

SCHEXTLOWRATESW (Low Rate SCH Extension Switch)

[Description]

It is shielded on the Airbridge Maintenance System.

It controls whether to allow low rate SCH extension, that is, if the judged SCH rate is higher than existing SCH rate, whether existing SCH is extended, which is caused by the restriction of extension of SCHs at the same rate.

[Type]


[Range and Units]

0 (Off) and 1 (ON)

[Operating Range]

0 and 1


1 (ON)

[Setting Tradeoffs]

None

FWDSCHEXTJUDGETIMEOS (Forward SCH Extension Judge Time Offset)

[Description]

It indicates minimum time for the start of SCH extension assignment after a burst ends.

It specifies how many frames are processed before the previous SCH ends during the buffered SCH extension request. The SCH extension request is not processed beyond the time.

[Type]



2007-7-25


[Range and Units]


[Operating Range]

0–31


3, that is 3 frames


[Setting Tradeoffs]

None

FWDSCHEXTMAXTIMES (Forward SCH Extension Max. Times)

[Description]

It indicates the maximum number of burst for a specified forward SCH extension.

[Type]


[Range and Units]

0–65535, in the unit of times

[Operating Range]

0–65535


100

[Setting Tradeoffs]

Forward SCH extension is oriented to single user at the cost of inequality.

The greater the value of this parameter, the better the performance of data transmission is.

The forward SCH extension may affect the data request and transmission of other users.

5.4 Service Redirection Parameters

[Command name]

MOD SRCFG (Algorithm configuration/Modify service redirection parameters)

PLTTP (Pilot Type)

[Description]

It indicates current pilot type.


2007-7-25


According to current pilot type, the MS determines how to perform the service redirection.

0--- IS95A/95B cell, that is, IS2000 MSs are redirected. 1---IS2000 cell, that is, IS95A/B MSs are redirected. 2---IS95A/IS2000 mixed cell, that is, IS95B MSs are redirected. 3--IS95A/IS95B/IS2000 mixed cell respectively, that is, the inter-cell redirection

with different types is not performed. [Type]

It is an Um interface parameter (SRDM).

[Range and Units]

0–3 0--- IS95A/95B cell 1---IS2000 cell 2---IS95A/IS2000 mixed cell 3--IS95A/IS95B/IS2000 mixed cell respectively

[Operating Range]

0-3


It is set based on actual conditions.

[Setting Tradeoffs]

None

IFCELLTP (Allow Service Redirection based on Current Cell Type)

[Description]

It is used together with PLTTP. The service redirection is effective based on cell type only.

[Type]


[Range and Units]

0 and 1 0---disabled 1----enabled

[Operating Range]

0 and 1



[Setting Tradeoffs]

None


2007-7-25


SRLODSWT (Redirection on Congestion Switch)

[Description]

It specifies whether to enable the redirection on congestion switch.

[Type]


[Range and Units]

0 and 1 1--The redirection is performed in the case of congestion. 0--The redirection is not performed.

[Operating Range]

0 and 1



[Setting Tradeoffs]

None

SRSWT1 (Redirection on Illegal MS Switch)

[Description]

It specifies whether to enable the redirection on illegal MS switch.

[Type]


[Range and Units]

0 and 1 1--The illegal MSs are redirected. 0--the redirection is not performed.

[Operating Range]

0 and 1



[Setting Tradeoffs]

None

SRSID (System ID)

[Description]

It indicates the system ID of target redirection cell.

It redirects the MS to SID of a specified system, and 0 means that the redirection is not performed.


2007-7-25


[Type]


[Range and Units]

Integral of 15 bit

[Operating Range]

0-2^15


If the MS is redirected to SID of a specified system, the BTS sets the value as SID. Otherwise, the BTS sets the value as 0.

[Setting Tradeoffs]

None

SRNID (Network ID)

[Description]

It indicates the network ID of target redirection cell.

If the MS is redirected to NID of a specified system, the BTS sets the value as NID. Otherwise, the BTS sets the value as 65535.

[Type]

It is an Um interface (SRDM).

[Range and Units]

16 bit

[Operating Range]

16 bit



[Setting Tradeoffs]

None

BNDCLSS (Band Class)

[Description]

It indicates band class of the target cell’s redirection system.

[Type]


[Range and Units]


2007-7-25


0–9

[Operating Range]

0–9



[Setting Tradeoffs]

None

SRFRQX (Service Redirection Target Channel X)

[Description]

It indicates the target frequency used by service redirection.

There are six target frequencies overall, that is, X indicates No. 1 to No. 6.

The valid value is 0 to 2047. The frequency not configured is set to 65535.

The value is set based on actual conditions. If it is set to 65535, all the following target frequencies are ineffective. Therefore, the value must be set in sequence.

[Type]

It is an Um interface parameter

[Range and Units]

0–2047 are valid channel numbers, and 65535 indicates invalid target frequency.

[Operating Range]

0–2047 and 65535



It is defaulted to 65535.

[Setting Tradeoffs]

The value is set based on the frequencies of actual redirection target cell.

Chapter 6 Overhead Messages

All the parameters are configured based on the sector carrier.

6.1 Synchronization Channel Messages

[Command name]

MOD SCHM (Modify Synchronization Channel Message)


2007-7-25


LOCTMOFF (Local Time Offset)

[Description]

It indicates the local time zone, namely, the offset of the local time to the Greenwich Mean Time (GMT).

China is located at GMT+8, so the LTM_OFF sent in the SCHM is 16 (16*30 minutes=8 hours). Some countries still use the daylight saving time system. In fact, there is no special-purpose field in the Qualcomm chips to realize the daylight saving time. If necessary, the daylight saving time can be realized only by modifying the LTM_OFF. If daylight saving time system is used at Time Zone GMT+8, one hour is faster than normal time, that is, 50 is set at LTM_OFF, namely, Time Zone GMT+9.

[Type]

It is an Um interface parameter (SCHM).

[Range and Units]

0–63 (corresponding to -32–31), in the unit of 30 minutes

[Operating Range]

0–63


48 (corresponding to 16), that is Time Zone GMT+8

[Setting Tradeoffs]

It is set based on the time zone where the system is located.

PRAT (Paging Channel Rate)

[Description]

It indicates the paging channel rate. If the value of this parameter is modified, the paging channel power also must be allocated. For details, see 2.5

[Type]


[Range and Units]

0–3 00 (full rate—9600 bps) 01 (half-rate---4800 bps) 10-reserved 11-reserved

[Operating Range]

9600 bps and 4800 bps


9600 bps


2007-7-25


[Setting Tradeoffs]

This parameter is determined based on the capacity of paging channel and the requirement for forward link service capacity.

If the value of this parameter is 9600 bps, the capacity of paging channel increases at the cost of partial capacity of forward link.

If the value of this parameter is 4800 bps, the capacity of paging channel is reduced but the capacity of forward link increases.

CDMABSN (CDMA Channel No.)

[Description]

It indicates CDMA channel number that corresponds to frequency used by the carrier and used by IS-95 MSs.

[Type]


[Range and Units]

0–2047

[Operating Range]

0–2047


This parameter is configured based on channel number of carrier used by IS-95 MSs.

If the channel numbers used by IS-95 and IS-2000 MSs are not specified, any normal channel number of carrier under the sector is OK.

[Setting Tradeoffs]

None

EXTCDMABSN (Extended CDMA Channel No.)

[Description]

It indicates CDMA channel number that corresponds to frequency used by the carrier and used by IS-2000 MSs.

[Type]


[Range and Units]

0–2047

[Operating Range]

0–2047



2007-7-25


This parameter is configured based on carrier frequency used by IS-2000 MSs.

If the channel numbers used by IS-95 and IS-2000 MSs are not specified, any normal carrier frequency under the sector is OK.

[Setting Tradeoffs]

None

6.2 System Parameter Messages

[Command name]

MOD SPM

REGZN (Registration Zone)

[Description]

It indicates the registration zone code of the sector.

The REGZN, SID, and NID determine a unique CDMA registration zone. It applies to registration based on registration zone. It is assigned according to actual conditions during the network planning. For details, see IS2000-5(2.6.5.1.5).

[Type]

It is an Um interface parameter (SPM/MSRM)

[Range and Units]

0x000–0xFFF (0–4095)

[Operating Range]

0–4095


0 means that if the registration is based on registration zone, the registration zone is assigned based on registration zone.

[Setting Tradeoffs]

During the setting of registration zone, the larger a registration zone, the larger the paging overhead. Consequently, the paging capacity is insufficient, especially when there are many short message services.

The smaller a registration zone, the less the paging overhead is. Consequently, the system capacity increases, but the registration is extra frequent to affect the reverse capacity. The access of called party is difficult at the edge of registration zone.

TOTALZN (Number of Total Registration Zones to be Retained)

[Description]

It indicates total number of registration zones. It applies to registration based on registration zone.


2007-7-25


In the commercial network, it is a basic registration method, and enables the MS to update the location and the network knows the latest location of MS in time when the MS moves from a REGZN to another REGZN.

The MSC delivers the paging based on LAC, and the division of registration zone can be consistent with that of LAC area.

[Type]


[Range and Units]

0–7

“0” indicates zone-based registration is not allowed.

[Operating Range]

0–7


1 (if the zone-based registration is used, the value of this parameter is not 0)

[Setting Tradeoffs]

If the value of this parameter is greater than 1, the frequent handoff of the MS on the border of registration zones can be avoided, but the location update is delayed.

ZNTMR (Zone Timer Length)

[Description]

The MS saves the REGZN in the SPM to the zone list. If a message including the REGZN is not received within the specified time, the MS deletes the REGZN. When the zone-based registration is used, that is, the TOTALZN value is not 0, the value is effective.

[Type]


[Range and Units]

0–7, in the unit of minute

Table 6-1 describes the zone timer values.

Table 6-1 Zone Timer values

Value (in binary) Timer length (in minutes)

000 1

001 2

010 5

011 10

100 20


2007-7-25


101 30

110 45

111 60

[Operating Range]

0–7


2 and 5 minutes

[Setting Tradeoffs]

If TOTALZONES is greater than 1, the value of this parameter can be small to reduce the effect on the paging, such as 1.

If TOTALZONES is 1, this parameter is not effective largely.

MSID (Multiple SID Storage Indicator)

[Description]

It determines whether to allow an MS to store the SID_NID_LIST containing different SIDs.

[Type]

It is an Um interface parameter (SPM).

[Range and Units]

0 and 1

0—Off and 1---ON

[Operating Range]

0 and 1


0

[Setting Tradeoffs]

None

MNID (Multiple NID Storage Indicator)

[Description]

It indicates whether to allow an MS to save SID_NID_LIST containing the same SID but different NIDs.

[Type]



2007-7-25


[Range and Units]

0 and 1

0—Off and 1---ON

[Operating Range]

0 and 1


0

[Setting Tradeoffs]

None

MAXTSPRIDX (Max Slot Cycle Index)

[Description]

It indicates maximum cycle index in the slotted mode of paging channel. The timeslot cycle =1.28 * 2^ i.

For a specific MS, the slot cycle index is the small on between the slot cycle set in the MS and the maximum slot cycle index allowed by the BSS.

[Type]


[Range and Units]

0–7

[Operating Range]

0–2


1

[Setting Tradeoffs]

When the value of this parameter is small, the call setup delay can be reduced, but the MS consumes more power and the standby time is shortened.

When the value of this parameter is large, the call setup delay is longer but the MS consumes less power.

If CCHINFOINCL is 1, the BTS must contain the field. Otherwise, the BTS does not contain the field.

HOMEREG (Home Registration Indicator)

[Description]

It indicates whether to allow a non-roaming MS to register.


2007-7-25


If the value of this parameter is 1 and MOB_TERM_HOME=1, the MS can register automatically. The auto registration includes MS power-on auto registration, MS power-off auto registration, time-based registration, zone-based registration and distance-based registration.

[Type]


[Range and Units]

0 and 1

0—Off and 1---ON

[Operating Range]

1, that is, the home registration is enabled.


1

[Setting Tradeoffs]

None

FORSIDREG (SID Roamer Registration Indicator)

[Description]

It indicates whether to allow the MS from other SIDs registers.

If the value of this parameter is 1 and MOB_TERM_FOR_SID=1, the MS can register automatically. The auto registration includes MS power-on auto registration, MS power-off auto registration, time-based registration, zone-based registration and distance-based registration.

[Type]


[Range and Units]

0 and 1

0—Off and 1---ON

[Operating Range]

0 and 1


1

[Setting Tradeoffs]

Whether to allow the MS from other SIDs register according to actual conditions.

FORNIDREG (NID Roamer Registration Indicator)


2007-7-25


[Description]

It indicates whether to allow the MS from other NIDs registers.

If the value of this parameter is 1 and MOB_TERM_FOR_NID=1, the MS can register automatically. The auto registration includes MS power-on auto registration, MS power-off auto registration, time-based registration, zone-based registration and distance-based registration.

[Type]


[Range and Units]

0 and 1

0—Off and 1---ON

[Operating Range]

0 and 1


1

[Setting Tradeoffs]

Whether to allow the MS from other NIDs register according to actual conditions.

PWRUP (Power-up Registration Indicator)

[Description]

It indicates whether the MS registers automatically upon power-on and after receiving the Overhead message.

If the value of this parameter is 1, the MS registers automatically. If the value of this parameter is 0, the MS does not register automatically.

The MS starts the power-on registration after 20 seconds in IDLE state to avoid excessive registrations due to frequent power-on and power-off.

[Type]


[Range and Units]

0 and 1

0—Off and 1---ON

[Operating Range]

1


1

[Setting Tradeoffs]


2007-7-25


None

PWRDWN (Power-down Registration Indicator)

[Description]

It indicates whether the MS needs to register automatically upon power-down.

If the value of this parameter is 1, the MS can register automatically. If the value of this parameter is 0, the MS cannot register automatically.

If the MS does not register in existing SID and NID, the MS does not perform power-down registration. The MS powers down after the power-down registration.

[Type]

Um interference parameter (SPM)

[Range and Units]

0 and 1

0—Off and 1---ON

[Operating Range]

1

The power-down registration must be enabled unless testing specified.


1

[Setting Tradeoffs]

None

PRMREG (Overhead Message Parameter Change Registration Indicator)

[Description]

It indicates whether the MS needs to register automatically when connects to a new system, or whether to allow the registration change of system parameter messages when the values of the overhead message parameters defined by the Um interface are changed.

If the value of this parameter is 1, the registration change is allowed. If the value of this parameter is 0, the registration change is not allowed.

The specified parameters set by the MS are: SLOT_CYCLE_INDEXp BTS type (SCMp) MOB_TERM_HOMEp/MOB_TERM_FOR_SIDp/ MOB_TERM_FOR_NIDp MS-supported band type, power level and radio configuration

In addition, only if there are no records matched with SID and NID in the SID_NID_LISTs saved by the MS, the parameter change registration is performed. When the parameters are changed, the MS deletes all the SID_NID_LISTs.


2007-7-25


Huawei has no experiences at the registration, so we do not know whether there are bad effects. After the parameters are changed, the MS deletes all the SID_NID_LISTs, regardless of the permission of HOME_REG.

[Type]


[Range and Units]

0 and 1

0—Off and 1---ON

[Operating Range]

0 and 1


1

[Setting Tradeoffs]

None

REGPRD (Timer-based Registration)

[Description]

It indicates timer-based registration cycle. Registration cycle=2^(REG_PRD/4)×0.08 second.

If the value of this parameter is 0, periodical registration is not used. The registration modes provided in the protocols must work together.

The periodical registration is used when MS does not update the location for a long time. It may be deactivated by the MSC if it is still not registered. The MS, however, moves between the location areas and must be ensured through zone-based registration and parameter-based registration.

[Type]


[Range and Units]

0–85

[Operating Range]

0 and 29–85


58, about half an hour

[Setting Tradeoffs]

The registration cycle is 1/4–1/3 of deactivation timer in length of MSC. Otherwise, the MS may be deactivated by the MSC and cannot be paged.


2007-7-25


BASELAT (Base Station Latitude)

[Description]

It indicates the base station latitude, in the mode of ± degree/minute/second. Here, “+” indicates east longitude or north latitude, and “-“indicates west longitude or south latitude. The second is in the unit of 0.25.

[Type]



The value is set based on base station latitude.

[Setting Tradeoffs]

The base station latitude must be accurate.

BASELONG (Base Station Longitude)

[Description]

It indicates the base station longitude, in the mode of ± degree/minute/second. Here, “+” indicates east longitude or north latitude, and “-“indicates west longitude or south latitude. The second is in the unit of 0.25.

[Type]



The value is set based on base station longitude.

[Setting Tradeoffs]

The base station longitude must be accurate.

REGDIST (Distance-based Registration)

[Description]

It indicates the distance-based registration threshold. The MS saves longitude and latitude of last registration. If the distance with longitude and latitude delivered from the Overhead message exceeds the value of REGDIST, the MS initiates a registration.

[Type]


[Range and Units]

0–2047

If the value of this parameter is 0, the MS registers beyond the distance specified.

[Operating Range]

0



2007-7-25


0

[Setting Tradeoffs]

None

RESCAN (Rescan Indicator)

[Description]

It indicates whether the MS needs to reselect system when receiving the message. The parameter is inherited from the AMPS system. Upon receiving the message, the MS re-initializes and reselects the system.

It is effective only when the contents of sync channel message change.

[Type]


[Range and Units]

0 and 1

0—Off and 1---ON

[Operating Range]

0


0

[Setting Tradeoffs]

None

6.3 Overhead Message Control Information

[Command name]

MOD SYSMSGCTRL

EXTSYSPRM (Extended System Parameter Message Send Indicator)

[Description]

If the extended system parameter message is sent on the paging channel, the value of this parameter is set to 1. Otherwise, it is set to 0.

[Type]


[Range and Units]

0 and 1


2007-7-25


0—Off and 1--ON

[Operating Range]

1


1

[Setting Tradeoffs]

None

EXTNGRLST (Extended Neighbor List Message Send Indicator)

[Description]

If the extended neighbor list message is sent on the paging channel, the value of this parameter is set to 1. Otherwise, it is set to 0.

The extended neighbor list message is used in the BandClass 1 rather than BandClass 0.

If the band class is 1, 3, or 4, and the minimum protocol revision is less than 6, the parameter is set to “Send”. Otherwise, it is set to “Not Send”. The value of this parameter is set based on actual networking needs.

[Type]


[Range and Units]

0 and 1

0—Off and 1--ON

[Operating Range]

0 and 1


0

[Setting Tradeoffs]

None

GENNBRLST (General Neighbor List Message Send Indicator)

[Description]

If the general neighbor list message is sent on the paging channel, the value of this parameter is set to 1. Otherwise, it is set to 0.

The neighbor list message can be used to specify neighbor cells at different channel numbers. If different-frequency cells exist in the network, the inter-frequency handoff must be performed, and the value of this parameter is set to 1.

[Type]


2007-7-25



[Range and Units]

0 and 1

0—Off and 1--ON

[Operating Range]

0 and 1


0

1—450 MHz cells

[Setting Tradeoffs]

None

GLBRDRCT (Global Service Redirection Message Send Indicator)

[Description]

If the global service redirection message is sent on the paging channel, the value of this parameter is set to1. Otherwise, it is set to 0.

Upon receiving the global service redirection message, the MS leaves existing sector carrier, and attempts to capture new channel based on the contents in the message. The message is used when:

The existing carrier is in the process of maintenance. The existing carrier is accessed or traffic channel is overloaded.

Only when the BTS protocol revision is 6 or is higher than 6, the message is sent. The matching protocol revision of BTS must be verified.

[Type]


[Range and Units]

0 and 1

0—Off and 1--ON

[Operating Range]

0 and 1


0

[Setting Tradeoffs]

None

EXTGLBRDRCT (Extended Global Service Redirection Message Send Indicator)


2007-7-25


[Description]

If the extended global service redirection message is sent on the paging channel, the value of this parameter is set to 0. Otherwise, the value of this parameter is set to 0.

Only when the BTS protocol revision is 6 or is higher than 6, the Overhead message is sent. The matching relation with the BTS protocol revision must be verified.

[Type]


[Range and Units]

0 and 1

0—Off and 1--ON

[Operating Range]

0 and 1


0

[Setting Tradeoffs]

None

EXTCHLST (Extended CDMA Channel List Message Send Indicator)

[Description]

If the extended CDMA list message is sent on the paging channel, the value of this parameter is set to 1. Otherwise, the value of this parameter is set to 0.

If the extended CDMA channel list message is sent, IS-2000 MS uses the channel number list HASH in the ECCLM, and IS-95 MS still uses the frequency list in the CCLM. IS-2000 and IS-95 MSs use different carriers to provide the control modes.

[Type]


[Range and Units]

0 and 1

0—Off and 1--ON

[Operating Range]

0 and 1


0

[Setting Tradeoffs]

None


2007-7-25


6.4 Access Parameter Messages

[Command name]

MOD APM (Base Station Controller Management\Configuration Management\Overhead Message Configuration\Modify Access Parameter Message)

NOMPWR (Nominal Transmit Power Offset)

[Description]

It is an open loop power control parameter and indicates nominal transmit power offset. It is used by the MS to estimate initial power of access channel in the case of open loop power control correction.

For details, see INITPWR (Access Initial Power Offset).

For NOMPWREXT (Tx Power Extension Indication), see the description of this parameter in the APM.

[Type]

It is an Um interface parameter (APM/UHDM/GHDM).

[Range and Units]


[Operating Range]

-8 – 7 (dB)


4

[Setting Tradeoffs]

If the value of this parameter is too great, the reverse initial Tx power may increase, and extra interference for the reverse link exists.

If the value of this parameter is too small, the initial access probe energy is too slow and cannot be received correctly by the BTS, and the access speed and success rate are affected.

INITPWR (Access Initial Power Offset)

[Description]

It is an open loop power control parameter and determines initial Tx power offset of power probe frame.

The physical meaning is to adjust the first access probe frame and enable the Tx power to be less than required power.

In addition, the value of this parameter can partially compensate path loss difference caused by incomplete relevance between CDMA forward channel and reverse channel.

[Type]


2007-7-25


It is an Um interface parameter (APM).

[Range and Units]


[Operating Range]

-3–3


0

[Setting Tradeoffs]

The value of this parameter varies with actual load.

If the value of this parameter is too great, the reverse capacity is affected and there are many redundant powers.

If the value of this parameter is too small, the MS can access the network after several attempts, the MS access takes a longer time and even the access may fail.

PWRSTEP (Access Power Increment)

[Description]

It indicates power increase step.

When an MS is probing for access, the power for next probe must increase if the previous one fails, that is, the power between two neighbor access probes must increase.

Tx power used for MS access = access attempts * power Up step.

[Type]


[Range and Units]

0–7 (dB)

[Operating Range]

2–5

The value of this parameter cannot be greater than 5.


5

[Setting Tradeoffs]

If the value of this parameter is too great, reverse Tx power may be too large and the reverse link interference increases.

If the value of this parameter is too small, the MS accesses the system after multiple access probes.


2007-7-25


NUMSTEP (Number of Access Probes)

[Description]

It specifies access probes allowed for each access probe sequence.

The number of he allowed access probe is NUM_STEP+1.

[Type]


[Range and Units]

0–15

[Operating Range]

3–6, that is, each access sequence has 4–7 access probes.


4

[Setting Tradeoffs]

The greater the value of this parameter, the easier an access probe sequence is accessed. The reverse link interference may increase, because access failure also may be caused by the collision.

If the access fails, the call attempt interval is longer. NUMSTEP, PWRSTEP, and INITPWR determine the access performance.

PSIST09 (Persistence Value for Access Overload Classes 0–9)

[Description]

Persistence value for access overload classes 0-9 of common calls determines the threshold P for persistent detection, and the access attempt must pass persistent detection. For details, see IS95A-C6 protocols.

In each slot after the delay RS, the MS performs pseudo random persistent detection based on the P. (There is a RP ranging from 0 to 1 in each slot. If the RP is less than P, the persistent detection is passed).

If the persistent detection is passed, the first probe of access sequence is sent in the slot. Otherwise, the access probe sequence is detected in next slot. If the P=0, the access attempt fails.

When the ACH request is not triggered by the MS registration and message transmission, P is calculated as follows:


2007-7-25


[Type]

It is an Um interface parameter (APM/EAPM).

[Range and Units]

0–63

[Operating Range]

0–63


0

[Setting Tradeoffs]

If the value of this parameter is 0, the delay is 0.

If an MS wants to access the system, it accesses immediately the system.

When the system load is too heavy, the value of this group of parameters increase, and access attempt delay is longer and the collision probability is reduced.

PSIST1015(Persistence Value for Access Overload Classes 10-15)

[Description]

If an MS with access overload classes 10-15, is permitted to send request in the ACH, the BTS sets this parameter to the persistence value used.

For details, see PSIST09.

[Type]


[Range and Units]

0–7

[Operating Range]

0–7



2007-7-25


0

[Setting Tradeoffs]


When the system load is too heavy, the group of parameters for emergency calls cannot be changed to keep the access speed of emergency calls access.

MSGPSIST (Persistence Modifier for Message Transmission)

[Description]

It is the persistence modifier sent by access probe message.


During the access probe of message transmission, the P*2 -MSG_PSIST is compared to the RP.

[Type]


[Range and Units]

0–7

[Operating Range]

0–7


0

[Setting Tradeoffs]


REGPSIST (Persistence Modifier for Registration)

[Description]

It is the persistence modifier in the access attempt message during the registration.


During the access attempt for message transmission, the P* 2 -REG_PSIST is compared to the RP.

[Type]


[Range and Units]

0–7

[Operating Range]

0–7


2007-7-25



0

[Setting Tradeoffs]

If the value of this parameter is 0, the delay is 0.


PRBPNRAN (Time Randomization for ACH Probes)

[Description]

It computes pseudo noise code random delay.

During an access attempt, the accurate transmission time of CH is determined by the pseudo noise code random delay. The transmission time is RN times of pseudo noise code chip. The RN can be calculated based on the HASH functions and ranges from 0 to 2* PROBE_PN_RAN – 1 PN chip.

[Type]


[Range and Units]

0–9

[Operating Range]

0–1


0

[Setting Tradeoffs]

When the reverse load is heavy, the value of this parameter can be great and the access collision probability is reduced.

ACCTMO (Acknowledgement Timeout)

[Description]

It indicates access probe acknowledgment timeout.

If an MS does not receive response from the BTS after (2+ACC_TMO)×80ms, it is regarded that the BTS does not receive the ACH messages.

The time from access and acknowledgment is about350ms, so the value of this parameter is 3.

[Type]


[Range and Units]



2007-7-25


[Operating Range]

2–5


3

[Setting Tradeoffs]

If the value of this parameter is too small, the MS sends access probe before the acknowledgment from the BTS, and the ACH load and collision probability increase. The reverse link interference also increases.

If the value of this parameter is too great, the access takes a longer time when an access attempt requires multiple probes.

PRBBKOFF (ACH Probe Backoff Range)

[Description]

It specifies the maximum delay for access probe in the access sequence.

When multiplexing sub-layer of the common channel sends all access probes in an access sequence on the R-ACH corresponding to the current F-PCH, the next access probe is sent after an additional delay RT. The RT ranges from 0 to 1+PROBE_BKOFF.

If the multiplexing sub-layer of the common channel sends access probes on any of R-ACHs corresponding to the current F-PCH, the next access probe is also sent after an additional delay RT. The RT ranges from 0 to 1 + PROBE_BKOFF.

[Type]


[Range and Units]

0–15 (a maximum of 1–16 timeslots)

[Operating Range]

0–1(a maximum of 1-2 timeslots)


0 (a maximum of one timeslot)

[Setting Tradeoffs]

If the value of this parameter is too great, the MS access is delayed when there are many access attempt probes.

If the value of this parameter is too small, the collision probability increases when the system load is heavy.

If the system load is small, the value can be small.

If the system load is heavy, the value can be great.

BKOFF (ACH Probe Sequence Backoff Range)


2007-7-25


[Description]

It indicates backoff range of ACH probe sequence.

The access probe sequence (except the first) has a sequence delay RS. The RS ranges from 0 to 1+BKOFF.

BKOFF = the maximum delay for access probe in the access sequence – 1.

[Type]


[Range and Units]


[Operating Range]



0 (a maximum of 1 timeslot)

[Setting Tradeoffs]

If the value of this parameter is too great, the collision probability is reduced in the case of high reverse load, but the MS access is delayed.

MAXREQSEQ (Max Number of Probe Sequences for an ACH Request)

[Description]

It indicates the maximum number of access probe sequences for an ACH request (such as origination message).

If the access probe sequence (except the first) has a sequence delay RS, the RS ranges from 0 to BKOFF.

[Type]


[Range and Units]

1–15

[Operating Range]

2–3


3

[Setting Tradeoffs]

If the value of this parameter is too great, the access success rate increases but the ACH capacity is reduced.

If the value of this parameter is too small, such as 1, the sequences cannot be resent.


2007-7-25


The radio environments are changeable. The radio environments may get better in the case of the second sequence if the first access fails. Therefore, the value of this parameter must be no smaller than 2.

MAXRSPSEQ (Max. Number of Probe Sequences for an ACH Response)

[Description]

It indicates the maximum number of access probe sequences for an ACH response (such as paging response).

If the access probe sequence (except the first) has a sequence delay RS, the RS ranges from 0 to BKOFF.

[Type]


[Range and Units]

1–15

[Operating Range]

2–3


3

[Setting Tradeoffs]

It is the same as that of MAXREQSEQ.

NOMPWREXT (Tx Power Extension Indication)

[Description]

It indicates extended nominal power used in the open loop power estimation.

The physical meaning of this parameter and NOMPWR calibrate the offset of BTS Tx power relative to nominal power.

[Type]

It is an Um interface parameter (APM/UHDM/GHDM).

[Range and Units]

0 and 1

0—Off and 1---ON

[Operating Range]

0 and 1


0


2007-7-25


[Setting Tradeoffs]

None

PSISTEMGINCL (Emergency Call Persistence Value Included)

[Description]

It indicates emergency call persistence flag, and specifies whether allow the MSs with overload classes 0-9 for persistence value of access attempts during emergency calls.

[Type]


[Range and Units]

0 and 1

[Operating Range]

0 and 1


0

[Setting Tradeoffs]

None

PSIST09 (Persistence Value for Access Overload Classes 0-9)

[Description]

It indicates the persistence value for access overload classes 0-9 when the MS makes emergency calls.

If the value of PSISTEMGINCL is 0, this parameter is invalid.

When the value of PSISTEMGINCL is 1, and the MSs with access overload classes 0-9 can send emergency calls request on ACH, the value of this parameter is 0.

If the emergency calls are not allowed, the value of this parameter is 7.

[Type]


[Range and Units]

0 and 1

[Operating Range]

0 and 1


0

[Setting Tradeoffs]


2007-7-25


None

6.5 Access Channel Parameters

[Command name]

MOD ACH (Base Station Controller Management\Configuration Management\Cell Channel Management\Modify Access Channel Parameters)

PCN (PCH No.)

[Description]

It indicates the number of paging channel that the access channel corresponds to.

The PCN and Module ID comprise the index, as well as the pilot ID.

[Range and Units]

1–7

[Operating Range]

1–7


According to the number of paging channels, a record is configured for each paging channel.

[Setting Tradeoffs]

None

ACCNUM (Number of Access Channels)

[Description]

It indicates the number of access channels related to this paging channel.

[Type]


[Range and Units]

1–32

[Operating Range]

1


1, that is, one access channel

[Setting Tradeoffs]


2007-7-25


None

MAXLEN (Max. Message Length)

[Description]

It indicates maximum length of the access channel message.

MAXLEN = Maximum frames of each access channel message – 3.

[Type]

It is an Um interface parameter.

[Range and Units]

0–7, that is, 3–10 frames

[Operating Range]



3 or 4, that is, 6 or 7 frames

[Setting Tradeoffs]

If the value of this parameter is too small, large access channel messages cannot be sent, such as origination messages containing dialing numbers or Data burst Message.

If the value of this parameter is too great, large messages can be sent but the messages may be conflicted easily and the access channel capacity is reduced because sending the messages takes a longer time.

PAMLEN (Header Length)

[Description]

It indicates the header length of the access channel.

PAMLEN= Maximum preamble frames of access channel - 1

[Type]


[Range and Units]


[Operating Range]




[Setting Tradeoffs]


2007-7-25


If the value of this parameter is too great, the access channel capacity is wasted. (1+PAMLEN) frames do not carry the message contents, so the BTS can capture the MS with fewer frames.

If the value of this parameter is too small, the BTS is hard to capture successfully the MS. Consequently, more messages of MS are resent.

The parameter adjustment is related to the size of search window used by the BTS to capture access channels.

6.6 Extended System Parameter Messages

[Command name]

MOD ESPM (Base Station Controller Management\Configuration Management\Overhead Message Configuration\Modify Extended System Parameter Messages)

PMSIDTP (Preferred ACH MS ID Type)

[Description]

It indicates MS ID of preferred access channel.

IMSI and ESN identify the MS.

[Type]


[Range and Units]

0–3

[Operating Range]

0–3


3

[Setting Tradeoffs]

None

BCIDX (Broadcast Slot Cycle Index)

[Description]

If the periodic broadcast paging is allowed, the value of this parameter is 1 to 7 to identify broadcast slot cycle index.

If periodic broadcast paging is prohibited, the value of this parameter is 0.

Broadcast period = 1.28 * 2^ i+0.24.

[Type]


2007-7-25


It is an Um interface parameter (ESPM/ MCRRPM).

[Range and Units]

0–7

0---the periodic broadcast paging is prohibited.

[Operating Range]

0


0

[Setting Tradeoffs]

None

PZNID (Data Packet Zone Indicator)

[Description]

It indicates data packet zone ID of cell.

If the packet data service is supported, the value of this parameter is non-0. Otherwise, the value is 0.

[Type]


[Range and Units]

8 bit

[Operating Range]

8 bit



MAXALTSRV (Max. Number of Alternative Service Options)

[Description]

It specifies the maximum number of alternative service options contained in the origination message and paging response message.

[Type]


[Range and Units]

0–7

[Operating Range]


2007-7-25


0–7


1

[Setting Tradeoffs]

None

RESELINCL (System Reselection Parameters Included Indicator)

[Description]

If the system reselection parameters are included in the message, the value of this parameter is 1. Otherwise, the value is 0.

[Type]


[Range and Units]

0 and

[Operating Range]

0 and 1


0

[Setting Tradeoffs]

None

PLTRPT (Pilot Reporting Indicator)

[Description]

It specifies whether to contain pilot information in all the ACH messages.

If the MS must report the information like pilot strength exceeds auxiliary pilot of TADD in all access channel messages, the value of this parameter is 1.

If the MS must report the information in origination message and paging response message only, the value is 0.

[Type]


[Range and Units]

0 and 1

[Operating Range]

0



2007-7-25


0

[Setting Tradeoffs]

None

NBRSENTRY (Neighbor Set Access HO Entry HO Info Included Indicator)

[Description]

It specifies whether to contain related fields of access entry handoff in the ESPM.

If the fields are contained, the value of this parameter is 1. Otherwise, the value is 0.

[Type]


[Range and Units]

0 and 1

[Operating Range]

0 and 1


0

[Setting Tradeoffs]

None

ACCENTHO (Access Entry HO Permitted Indicator)

[Description]

If the value of NBRSENTRY is 1, the BTS contains the field. Otherwise, the BTS neglects the field, that is, if access entry handoff is allowed in the Order and Message Response sub-states, the value of this parameter is 1. Otherwise, the value is 0.

[Type]


[Range and Units]

0 and 1


0

[Setting Tradeoffs]

Currently, Huawei system does not support the access entry handoff in the Order and Message Response sub-states, but supports the access entry handoff in the paging response sub-state.


2007-7-25


NGHBRSETACSINFO (Neighbor Set Access HO Info Included Indicator)

[Description]

It specifies whether to contain related fields of access handoff in the ESPM.

If the fields are contained, the value of this parameter is 1. Otherwise, the value is 0.

[Type]


[Range and Units]

0 and 1

[Operating Range]

0


0

ACSHO (Access HO Permitted Indicator)

[Description]

It specifies whether to allow an MS for access handoff.

If the value of NBRSETACSINFO is 1, the BTS must contain the field. Otherwise, the BTS neglects the field.

If access handoff is allowed for an MS, the value of this parameter is 1. Otherwise, the value is 0.

[Type]


[Range and Units]

0 and 1

[Operating Range]

0


0

[Setting Tradeoffs]

None

ACSPRBHO (Access Probe HO Permitted Indicator)

[Description]

It specifies whether to allow an MS for access probe handoff.

If the value of NBRSETACSINFO is 1, the BTS must contain the field. Otherwise, the BTS neglects the field.


2007-7-25


If the access probe handoff is allowed for an MS, the value of this parameter is 1. Otherwise, the value is 0.

[Type]


[Range and Units]

0 and 1

[Operating Range]

0


0

[Setting Tradeoffs]

None

NBRSETSIZE (Number of Neighbor Set Pilot)

[Description]

If the value of NBRSETENTRY or NBRSETACSINFO is 1, the parameter is the number of pilots included in the NLM, ENLM or GNLM.

[Type]


[Range and Units]

0–40

[Operating Range]

0–32


The value is generated by the system.

[Setting Tradeoffs]

None

MAXNUMPRBHO (Max. Number of Access Probe HOs Permitted)

[Description]

It indicates the maximum access probe handoffs.

[Type]


[Range and Units]

1–7


2007-7-25


[Operating Range]

1–7


1


[Setting Tradeoffs]

None

ACCHOLSTUPD (Access HO List Update Permitted Indicator)

[Description]

It specifies whether an MS is allowed to update access handoff list during an access probe.

[Type]


[Range and Units]

0 and 1

[Operating Range]

0 and 1


0


[Setting Tradeoffs]

None

ACSHOALLOWED (Access Handoff Permitted Indicator)

[Description]

It specifies whether to allow access probe handoff and access handoff.

If the value of NBRSETACSHOINF is 1 and NBRSETSIZE exists, the parameter is required.

[Type]


[Range and Units]

0 and 1

[Operating Range]


2007-7-25


0 and 1


0


[Setting Tradeoffs]

If the value of this parameter is 1 and ACSPRBHO is 1, the access probe handoff is allowed in the paging response message and origination message.

If the value of this parameter is 1 and ACSHO is 1,the access handoff is allowed in the messages without responses.

ACSENTRY (Access Entry Handoff Permitted Indicator)

[Description]

It specifies whether to allow access entry handoff.

If the value of NBRSETENTRY is 1 and NBRSETSIZE exists, the parameter is required.

[Type]


[Range and Units]

0 and 1

[Operating Range]

0 and 1


0


[Setting Tradeoffs]

None

ACSHOMSGRSP (Access HO in Response Message Support Indicator)

[Description]

It specifies whether to support access handoff in the messages requiring responses.

[Type]


[Range and Units]

0 and 1

[Operating Range]


2007-7-25


0


0

The function is not supported currently, so the value of this parameter must be 0.

[Setting Tradeoffs]

None

ACSPRBHOOTHERMSG (Access Probe HO in Other Messages Support Indicator)

[Description]

It specifies whether to support access probe handoff in other messages except origination message and paging response message.

[Type]


[Range and Units]

0 and 1

[Operating Range]

0


0

[Setting Tradeoffs]

None

BCGPSAUG (Broadcast GPS Assist Indicator)

[Description]

It specifies whether the broadcast GPS assist is supported.

If the broadcast GPS assist capability is supported, the value of this parameter is 1. Otherwise, the value is 0.

[Type]


[Range and Units]

0 and 1


0


2007-7-25


QPCHSPT (QPCH Support Indicator)

[Description]

It is set indirectly based on QPCHNUM.

If the value of QPCHNUM is 0, the QPCHSPT is 0. Otherwise, QPCHSPT is 1.

If quick paging channels must be added, the MSC must support it and BSC also must configure multiple tables.

[Type]


[Range and Units]

0 and 1

[Operating Range]

0 and 1


0

[Setting Tradeoffs]

If the quick paging channel must be supported, the value of this parameter is set to 1.

SDBSPT (SDB Support Indicator)

[Description]

It specifies whether the Short Data Burst (SDB) is supported.

[Type]


[Range and Units]

0 and 1

[Operating Range]

0 and 1


0

[Setting Tradeoffs]

If the SDB can be sent on common channel, the value of this parameter is 1.

REVCHGAIN (RTCH Gain Adjustment)

[Description]


2007-7-25


It indicates the reverse traffic channel output power offset (above RC2 configuration) relative to reverse pilot channel power.

The BTS sets this parameter as correction factor of reverse traffic channel power for the MS.

It is expressed as binary supplemental code, in the unit of 0.125 dB.

[Type]


[Range and Units]


[Operating Range]



0, that is, 0 dB

[Setting Tradeoffs]

None

ECTHRS (Pilot Min. Power Threshold)

[Description]

It indicates the pilot minimum receiving power threshold in the ESPM.

It is valid only when the value of RESELINCL is 1.

If Rx+10 log10 (PS) < EC_THRESH - 115, the reselection conditions of power threshold are satisfied.

[Type]


[Range and Units]

0–31

[Operating Range]

0–31


31

[Setting Tradeoffs]

If the value of RESELINCL is 0, the parameters are not used for reselection.

If the reselection function is enabled, that is, the value of RESELINCL is 1, the ECTHRS is calculated based on actual conditions.

ECIOTHRS (Pilot Min EC/IO Threshold)


2007-7-25


[Description]

It indicates the pilot minimum EC/IO threshold in the ESPM.

The parameter is valid only when the value of RESELINCL is 1.

[Type]


[Range and Units]

0-31

[Operating Range]

0-31


30

[Setting Tradeoffs]

If the value of RESELLINCL is defaulted to 0, the parameters are not used for the reselection.

If the reselection function is enabled, that is, the value of RESELINCL is 1, ECIOTHRS is calculated based on actual conditions.

6.7 Neighbor List Messages

[Command name]

MOD SYSMSGCTRL

In the R002B03 later, the system delivers general neighbor list messages (GNLM) by modifying the commands on the Airbridge Maintenance System.

PLTINC (PN Increment)

[Description]

It indicates the increment of PN sequence offset index.

The value of this parameter is the greatest common divisor of pilot PN sequence offsets of neighbor BTSs. If the PLTINC is specified, the number of available pilot PN in the system is 512/PLTINC.

The smaller the value of this parameter, the more available pilot PN offsets are. Consequently, multiplexing distance between pilots with the same phase increase, the interference between them decrease, but the phase spacing between different pilots is decreased and the pilots may be confused.


2007-7-25


If the value of this parameter is too great, the available pilot PN offsets are reduced and pilots in the remaining set are reduced, too. The MS spends less time in scanning the pilots.

In actual conditions, the strong pilot signals may be lost hardly, but available pilot PN offsets decrease, the multiplexing distance between pilots with the same phase is reduced, and the interference between them increases.

In addition, this parameter determines the maximum size of SRCHWINN and SRCHWINR.

[Type]


[Range and Units]

1–15, 64PN chips

[Operating Range]

2, 4, 6, or 8


4

[Setting Tradeoffs]

It ranges from 2 to 6.

In the dense urban areas, the value of this parameter can be small.

In the wide coverage areas, the value of this parameter can be great.

6.8 Global Service Redirection Messages

[Command name]

MOD GSRDM

RDRCTACCOLC (Redirected Access Overload Classes)

[Description]

If the MS is not used for testing or emergency conditions, the access overload class of the MS is 0-9. The access overload class of an MS corresponds to the last digit of the decimal value of the IMSI.

For example, if the IMSI of an MS is 460030912120003, the access overload class of MS is 3. When the IMSI of MS is updated, the access overload class is also updated.

The access overload class of MS used for testing is 10 and that for emergency conditions is 11. The access overload classes 12-15 are reserved.


2007-7-25


Table 6-2 Redirection access overload classes

Sub-field bit Description Sub-field bit Description

ACCOLC_0 1 Access overload

class 0


class 8


class 1


class 9


class 2


class 10


class 3


class 11


class 4


class 12


class 5


class 13


class 6


class 14


class 7


class 15

[Type]

It is an Um interface parameter (GSRDM).

[Range and Units]

1–15, in the unit of 64PN chips

[Operating Range]

1–15


0

[Setting Tradeoffs]

If the redirection of MS of specific access overload class is enabled, the access overload class is 1. Otherwise, the access overload class is 0.

RETIFFAIL (Return If Fail Indicator)

[Description]


2007-7-25


It is an error return flag.

If an MS is allowed to return to the system when it fails to select target system using reselection rule contained in this message, he value of this parameter is set to 1. Otherwise, the value of this parameter is 0.

If the value of this parameter is 1, the MS may return to original carrier in the case of failure, and the ping-pong effect may be caused.

[Type]


[Range and Units]

0 and 1

0—Off and 1---ON

[Operating Range]

0 and 1


0

[Setting Tradeoffs]

None

EXCPREVMS (Exclude Redirection Indicator)

[Description]

If this message is valid for an MS supporting protocol revision 6 or above, the value of this parameter is set to 1. Otherwise, the value is 0.

[Type]


[Range and Units]

0 and 1

0—Off and 1---ON

[Operating Range]

0 and 1


0

[Setting Tradeoffs]

None


2007-7-25


RECTP (Redirection Record Type)

[Description]

Table 6-3 shows the redirection record type.

Table 6-3 Redirection record type

Description Record type (bin)

NDSS closure indicator '00000000'

Redirect MSs to an analog system '00000001'

Redirect MSs to a CDMA system '00000010'

Redirect MSs to a TACS analog system '00000011'

Redirect MSs to a JTACS analog system '00000100'

Other record types are reserved.

[Type]


[Range and Units]

0 and 1 0---No redirection 1---Redirect MSs to CDMA system

[Operating Range]

0 and 1


0

[Setting Tradeoffs]

None

6.9 Extended CDMA Channel List Messages

[Command name]

MOD ECCLM

RCQPCHSELINCL (RC and QPCH Selection Included Indicator)

[Description]

It indicates RC and QPCH selection included flag.


2007-7-25


If there are FREQNUM (Number of CDMA Frequency) of RCQPCHCAPIND (RC and QPCH Capacity Indicator), the BTS sets the value of this parameter to 1. Otherwise, the value of this parameter is 0.

If the QPCH is used, the value of this parameter must be set to 1.

[Type]

It is an Um interface parameter (ECCLM).

[Range and Units]

0 and 1

0—Off and 1---ON

[Operating Range]

0 and 1


1

[Setting Tradeoffs]

None

RCQPCHHASHIND (RC and QPCH Channel Search Indicator)

[Description]

It indicates RC and QPCH Hash Indicator flag.

If the value of RCQPCHSELINCL is 1, the BTS must include this field. Otherwise, the BTS must neglect this field.

If the CDMAFREQ is included in the HASH list of MS whose RC>2 or supporting quick paging, the BTS must set this field to 1. Otherwise, the value of this field is 0.

When extended CDMA channel list messages are sent on the broadcast control channel, and CDMAFREQ is included in the HASH list of MS supporting quick paging, the BTS must set this field to 1.

[Type]

It is an Um interface parameter (ECCLM).

[Range and Units]

0 and 1

0—Off and 1---ON

[Operating Range]

0 and


1

[Setting Tradeoffs]


2007-7-25


None

6.10 Extended Global Service Redirection Messages

[Command name]

MOD EGSRDM

RDRCTPREVINCL (Redirection Mobile Protocol Revision Included)

[Description]

It indicates the redirection protocol included flag.

[Type]

It is an Um interface parameter (EGSRDM).

[Range and Units]

0 and 1

[Operating Range]

0 and 1


0

[Setting Tradeoffs]

If the designated redirection in this parameter is used for the specified protocol revisions of MS, the value of this parameter is 1. Otherwise, the value is 0.

EXCPREV (Excluding Mobile Protocol Revision Indicator)

[Description]

If indicates the excluding mobile protocol revision indicator.

[Type]


[Range and Units]

0 and 1

[Operating Range]

0 and 1


0

[Setting Tradeoffs]


2007-7-25


If RDRCTPREVINCL is set to 1, the BTS must include the field. Otherwise, the BTS must neglect this field.

If MOBPREV is set between MINRDPREV and MAXRDPREV, and MS is excluded from global service redirection, the BTS must set the filed to 1. Otherwise, if MOBPREV is set beyond the range between MINRDPREV and MAXRDPREV, and the MS is controlled by the redirection, the BTS must the field to 0.

MINRDPREV (Min. Redirection Protocol Revision)

[Description]

It indicates the minimum redirection protocol revision.

[Type]


[Range and Units]

0–6

[Operating Range]

0–6


0

[Setting Tradeoffs]

It is minimum protocol revision used for performing the operations (that is, redirection or excluding redirection) specified by EXCPREV.

MAXRDPREV (Max. Redirection Protocol Revision)

[Description]

It indicates the maximum redirection protocol revision.

[Type]


[Range and Units]

0–6

[Operating Range]

0–6


6

[Setting Tradeoffs]

It is maximum protocol revision used for performing the operations (that is, redirection or excluding redirection) specified by EXCPREV.


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6.11 General Neighbor List Messages

[Command name]

MOD GNLM (Overhead Message Configuration\Modify General Neighbor List Messages)

SRCHMD (Search Mode)

[Description]

It indicates the search mode.

Table 6-4 describes the search mode and values.

Table 6-4 Search mode and values

Value (bin) Description

00 No search priority or search window

01 Search priority

10 Search window

11 Search priority or search window

[Type]

It is an Um interface parameter (GNLM).

[Range and Units]

0–3

[Operating Range]

0–3


1

[Setting Tradeoffs]


NBRCFGPNINCL (Neighbor Configuration and Pseudo Noise Code Offset Included)

[Description]

It controls whether a pilot includes neighbor configuration and pseudo noise code offset.

[Type]


[Range and Units]


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0 and 1

[Operating Range]

0 and 1


1

[Setting Tradeoffs]

If neighbor configuration and pseudo noise code offset are included, the value of this parameter is 1. Otherwise, the value is 0.

FREQFLDSINCL (Frequency Fields Included)

[Description]

It controls whether the adjacency of a carrier includes frequency field.

[Type]


[Range and Units]

0 and 1

[Operating Range]

0 and 1


1

[Setting Tradeoffs]

If the frequency field is included, the value of this parameter is 1. Otherwise, the value is 0.

USETM (Use Timing Indicator)

[Description]

It controls whether neighbor BTS uses the timing information.

[Type]


[Range and Units]

0 and 1

[Operating Range]

0 and 1



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0

[Setting Tradeoffs]

If the timing information of BTS is used for the neighbor BTS, the value of this parameter is 1. Otherwise, the value is 0.

GLBTXDURATION (Global Neighbor Tx Duration)

[Description]

If the GLBTMINCL is included and the value is 1, the BTS contains GLBTXDURATION and sets the value later. Otherwise, the field is neglected.

The value of this parameter is regarded as the Tx window size of BTS. In the Tx duration, the value of this parameter is equal to or greater than 3, in the unit of 80ms.

[Type]


[Range and Units]

0 and 3–15, in the unit of 80ms

[Operating Range]

0–6


0

[Setting Tradeoffs]

None

GLBTXPERIOD (Global Neighbor Tx Period)

[Description]

If the GLBTMINCL is included and the value is 1, the BTS contains GLBTXPERIOD and sets the value later. Otherwise, the field is neglected.

The value of this parameter is regarded as the period, in the unit of 80ms.

[Type]


[Range and Units]


[Operating Range]

0–127


0


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[Setting Tradeoffs]

None

SRCHOFS (Neighbor PICH Search Window Size Offset)

[Description]

It indicates search window size offset of neighbor pilot channel.

[Type]


[Range and Units]

0–7

[Operating Range]

0–7


0

[Setting Tradeoffs]

None

Chapter 7 BTS Cell Attribute Parameters

7.1 Setting BTS Reverse Chip Processing Parameters

Reverse chip processing parameters are set based on resource pool, that is, all the parameters of channel unit in the resource pool are configured with the same value.

CELLMODE (Cell Mode)

[Description]

It configures cell mode of the BTS.

[Type]

It is an internal BTS algorithm parameter.

[Range and Units]

0 and 1

[Operating Range]


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0---normal cell mode and 1---macro cell mode


None

[Setting Tradeoffs]

None

MAXRANUM (Max. Number of RACH)

[Description]

It indicates the maximum number of RACH that BT can search.

[Type]


[Range and Units]

1–32

[Operating Range]

1–32


2

[Setting Tradeoffs]

None

MAXREARCNUM (Max. Number of R-EACH and R-CCCH)

[Description]

It indicates the maximum number of R-EACH and R-CCCH that BTS can search.

The meaning of this parameter is the same as that of MAXRANUM.

It is used for R-EACH and R-CCCH.

[Type]


[Range and Units]

1–8

[Operating Range]

1–8


The value of this parameter is set based on actual conditions and depends on the search capability.


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Currently, the BTS cannot search the REACH and the value of this parameter is 1.

[Setting Tradeoffs]

None

MINPAMSZ (Min. Preamble Frame Length of ACH)

[Description]

It indicates the length of ACH access preamble frame (PAM_SZ+1).

[Type]


[Range and Units]

0–15

[Operating Range]

0–15


3

[Setting Tradeoffs]

None

ENSCHWADJ (Dynamically Adjust Search Center of TCH)

[Description]

It indicates whether to allow the CSM5000 to adjust automatically the search center.

[Type]


[Range and Units]

Disable and enable

[Operating Range]

Disable and enable


See [Additional Comments].

[Setting Tradeoffs]

None

[Additional Comments]

The value of TCHSCHWSZ is 1 only when this parameter is enabled


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CFM95 (Max. Number of Fingers Configured for IS-95 Channel)

[Description]

It indicates the maximum number of fingers configured for each IS95 channel.

[Type]


[Range and Units]

4–6

[Operating Range]

4–6


6

[Setting Tradeoffs]

None

CFM2K (Max. Number of Fingers Configured for IS-2000 Channel)

[Description]

It indicates the maximum number of fingers configured for each IS-2000 channel.

[Type]


[Range and Units]

4–8

[Operating Range]

4–8


8

[Setting Tradeoffs]

None

7.2 Setting BTS Cell Parameters

MAXCELLR (Max. Cell Radius)

[Description]

It indicates the maximum cell radius, in the unit of kilometer.


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The MS can work normally within the radius. From the perspective of geography, the value of this parameter is the longest distance covered by the BTS (that is, from the place where the BTS is located to the coverage border).

It sets the search window size of reverse common channel. For example, maxcellr = 39 that is, the cell radius is 39km. The kilometer (diameter) is converted into chips, that is, 5×64chips. This is the search window size of common channel.

The center of search window is a half of the common search window.

[Type]


[Range and Units]

Cell mode Parameter range (chips) Maximum cell radius (km)

Normal cell mode 0–1024 125

Macro cell mode 0–2048 250

[Operating Range]

Cell mode Operating range of maximum cell radius (km)

Normal cell mode 0–125

Macro cell mode 126–184 and 217–250

[Recommended Setting] In the BTS3612V100R002B02, normal cell mode and macro cell mode can be

modified. In other versions, the normal cell mode is defaulted.

In the BTS3612V100R001B02D007 and earlier and BTS3612V100R002B01D001, the cell radius obtained from BTS configuration script is dual-directional radius, that is, the cell diameter. It is recommended to 80.

In the BTS3612V100R001B02D008, BTS3612V100R002B01D002 and

BTS3612V100R002B01D003, this parameter is cell radius. It is recommended to 39.

In the BTS3612 V100R002B02, the value of this parameter is the cell radius. 40 is recommended for the normal cell mode and 250 for macro cell mode.

[Setting Tradeoffs]

None

MAXUSRSPD (Max. User Speed)

[Description]

It indicates the maximum user speed and set the Doppler frequency shift point of IS-2000 searcher.


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[Type]


[Range and Units]

0–65535

[Operating Range]

0–65535


255

[Setting Tradeoffs]

None

MAXSCHPAS (Max. Search Times of R-ACH, R-EACH and R-CCCH)

[Description]

It indicates the maximum search times of the preambles of R-ACH, R-EACH and R-CCCH.

[Type]


[Range and Units]

1–4

[Operating Range]

1–4


3

[Setting Tradeoffs]

If the value of this parameter is too great, the preambles of R-ACH, R-EACH and R-CCCH are searched unnecessarily for many times. Consequently, there are less searcher resources obtained from other channels and multipaths may be reported falsely.

If the value of this parameter is too small, some preambles may be missing.

TCHSCHWSZ (Search Window Size of Reverse Traffic Channel)

[Description]

It indicates the search window size of reverse traffic channel.

BTS has a search window of each traffic channel. The BTS can capture and demodulate the reverse signal only when the signal is in the search window.

[Type]


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[Range and Units]

1–16, in the unit of 64PN

[Operating Range]

1–16


1

[Setting Tradeoffs]

None

SCHSOS (Initial Offset of Reverse Common Channel Searcher)

[Description]

It indicates the initial offset of reverse common channel searcher.

[Type]


[Range and Units]

0–16376

[Operating Range]

0–16376


0

[Setting Tradeoffs]

None

PCM (Power Control Mode)

[Description]

It controls reverse power control command delivered to the MS when no fingers are locked on the reverse traffic channel, that is, before the BTS captures the MS or the MS is unblocked.

It indicates whether the MS increases the Tx power and quantity.

[Type]


[Range and Units]

0–3


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Table 7-1 shows the meanings of parameter value.

Table 7-1 Meanings of parameter value

0 M0dB CSMDEF_PC_NO_GAIN=0, the parameter is not adjusted.

1 M25dB If CSMDEF_PC_GAIN_25 dB =1, it corresponds to +25 dB/sec, with the step of 1 dB.

2 M50dB If CSMDEF_PC_GAIN_50 dB=2, it corresponds to +50 dB/sec, with the step of 1 dB.

3 M100dB If CSMDEF_PC_GAIN_100 dB=3, it corresponds to +100 dB/sec, with the step of 1 dB.

[Operating Range]

0–3


1

[Setting Tradeoffs]

If the value of this parameter is too great, the MS increases fast the Tx power. It helps the BTS re-capture fast the MS.

If re-capturing the MS takes a long time and the Tx power of MS exceeds the target power level fast, the reverse link capacity is reduced.

If the value of this parameter is too small, the MS may take a long time to increase the Tx power enough to be re-captured.

When the value of this parameter is 0, that is, there is no gain, the Tx power of MS is not changed and always less than the level at which the MS is captured or re-captured.

Documents

Guide to CDMA2000 1X BSS Network Planning Parameter Settings (for Customer)-20060315-C-2.0