CDMA Performance Parameters (EVDO) V3.0

Document No. Product Name CDMA2000 EVDO BSS

Intended Audience Huawei engineers Product

Version

CBSC version

MUSA V2R3C03B018SP04

PARC V3R1C02B017SP04

Edited by CDMA & WiMAX Network Performance Research Department

Document Version V3.0

CDMA Performance Parameters

(EVDO)

Prepared by CDMA & WiMAX Network Performance Research Department Date 2008-05

Reviewed by CDMA Network Planning Dept.

Wireless Network Research Dept, WN Date 2008-06

Reviewed by Date

Approved by Date

Huawei Technologies Co., Ltd.

All Rights Reserved

Revision Record

Date Release Description Author

2007-01 1.0 The first draft is finished. Design group in the CDMA & WiMAX Network Performance Research Department

2007-6-11 1.1 The document is modified according to the comments of network planning personnel.

Design group in the CDMA & WiMAX Network Performance Research Department

2008-5-20 3.0 Parameters and parameter remarks are added on the basis of the V1.2, and the structure of the contents is modified to match the V3R1C02.

Design group in the CDMA & WiMAX Network Performance Research Department

Contents

1 Preface .............................................................................................................................................8

1.1 About This Document ...................................................................................................................................... 8

1.1.1 Objective................................................................................................................................................. 8

1.1.2 Intended Audience .................................................................................................................................. 8

1.1.3 Organization............................................................................................................................................ 8

1.1.4 History Record ........................................................................................................................................ 9

1.1.5 References............................................................................................................................................. 10

1.2 Conventions and Descriptions........................................................................................................................ 10

1.3 Acronyms and Abbreviations ......................................................................................................................... 11

2 System Parameters ......................................................................................................................12

2.1 QuickConfig Message .................................................................................................................................... 12

2.1.1 Color Code (COLORCODE) ................................................................................................................ 12

2.1.2 SECTORID24 (SECTORID24) ............................................................................................................ 13

2.1.3 Redirection Identifier (DOREDIRECT) ............................................................................................... 14

2.2 SectorParametersMessage.............................................................................................................................. 15

2.2.1 Subnet Mask (SUBNETMASK)........................................................................................................... 15

2.2.2 Local Time Offset (DOLTMOFF)......................................................................................................... 16

2.2.3 Route Update Radius (ROUTEUP) ...................................................................................................... 17

2.2.4 Sector Extended Channel No. Included (ExtendedChannelIncluded)................................................... 18

2.2.5 Sector Extended Frequency List (ExtendedChannel) ........................................................................... 19

2.2.6 Access Hashing Channel Mask Change Identifier (AccessHashingChannelMaskLstIncluded) ........... 19

2.2.7 Access Hashing Channel Mask List (AccessHashingChannelLstMask)............................................... 20

2.2.8 Route Update Trigger Code Included (RouteUpdateTriggerCodeIncluded)......................................... 21

2.2.9 Route Update Trigger Code (RouteUpdateTriggerCode)...................................................................... 22

2.2.10 Maximum Duration of the Route Update Trigger Code Timer (RouteUpdateTriggerMaxAge)......... 22

2.2.11 Prior Session GAUP (PriorSessionGAUP) ......................................................................................... 23

3 Channel Parameters....................................................................................................................25

3.1 Control Channel Parameters........................................................................................................................... 25

3.1.1 Control Channel Rate (CCHRATE) ...................................................................................................... 25

3.1.2 Offset of the Control Channel Capsule (CAPSULEOFFSET).............................................................. 27

3.2 Access Channel Parameters............................................................................................................................ 28

3.2.1 Access Channel Probe Cycle (ACYCLEDURATION)......................................................................... 28

3.2.2 Access Probe Preamble Frame Length (PRBLEN)............................................................................... 29

3.2.3 Maximum Capsule Length (CAPSULELENMAX).............................................................................. 30

3.2.4 AT Open Loop Power Estimation (OLOOPADJUST) .......................................................................... 31

3.2.5 Open Loop Power Estimate Correction Factor (PRBINIADJUST)...................................................... 31

3.2.6 Maximum Number of Access Probes (PRBNUMSTEP) ...................................................................... 32

3.2.7 Probe Power UP Step (PWRSTEP)....................................................................................................... 33

3.2.8 Access Persistence Vector 0/1/2/3 (PERSISTENCE0/1/2/3) ................................................................ 34

3.2.9 Access Marco Diversity Switch (ACCMACRODIVSWITCH)............................................................ 35

3.2.10 Enhanced Access Parameters Included (ENHACCPARAIND).......................................................... 36

3.2.11 Slot-Based Access Preamble Length (PREAMBLELENSLOT) ........................................................ 37

3.2.12 Maximum Rate of Access Channel (SECTORACCMAXRATE)....................................................... 37

3.2.13 Probe Timeout Adjustment (PROBETIMEOUTADJUST)................................................................. 39

3.2.14 Nominal Pilot Strength (PILOTSTRNOMINAL)............................................................................... 40

3.2.15 Maximum Pilot Strength Correction (PILOTSTRCORTMAX) ......................................................... 40

3.2.16 Minimum Pilot Strength Correction (PILOTSTRCORTMIN) ........................................................... 41

3.3 RA Channel Parameters ................................................................................................................................. 42

3.3.1 RAB Length (RAB_LENGTH) ............................................................................................................ 42

3.3.2 RAB Offset (RAB_OFFSET) ............................................................................................................... 43

3.3.3 Reverse Active Channel Gain (RACGAIN).......................................................................................... 44

4 Handoff Parameters....................................................................................................................45

4.1 Co-Channel Pilot Set Management ................................................................................................................ 45

4.1.1 Maximum Branch Number for Active Set (HOMAXBRANCHNUM)................................................ 45

4.1.2 Whether to Allow a Soft Handoff in the Case of Different Active Sets (DIFFASSWITCH)................ 46

4.2 Pilot Search Management............................................................................................................................... 47

4.2.1 Search Window Size Contain Flag (NSRCHWININC) ........................................................................ 47

4.2.2 Search Window Size (NSRCHWINSIZE) ............................................................................................ 47

4.2.3 Search Window Offset Included Flag (NSRCHWINOFFSETINC) ..................................................... 48

4.2.4 Search Window Offset of Neighbor Set Branch (NSRCHWINOFFSET) ............................................ 49

4.2.5 Search Window Size of Neighbor Set Branch Included (NSRCHWININC)........................................ 50

4.2.6 Search Window Size of Neighbor Set Branch (NSRCHWINSIZE) ..................................................... 51

4.2.7 Search Window Offset of Neighbor Set Branch Included (NSRCHWINOFFSETINC)....................... 52

4.2.8 Search Window Offset of Neighbor Set Branch (NSRCHWINOFFSET) ............................................ 53

4.3 Virtual Soft Handoff....................................................................................................................................... 53

4.3.1 Virtual Soft Handoff Monitor Timer Length (SHOMONITORT)......................................................... 53

4.4 Intra-AN Hard Handoff (Parameters Related to EV-DO Intra-Frequency Hard Handoff) ............................. 54

4.4.1 EV-DO Intra-Frequency Hard Handoff Switch (SFDOHHOSW) ........................................................ 54

4.4.2 Relative Threshold of Co-Frequency Hard Handoff (RELATHRESH) ................................................ 55

4.4.3 Outgoing Handoff Threshold of Intra-Frequency Hard Handoff (SRCABSTHRESH) ........................ 56

4.4.4 Handoff Threshold of the Target Carrier Handoff of the Intra-frequency Hard Handoff (TRGABSTHRESH)...................................................................................................................................... 56

4.5 Intra-AN Hard Handoff (Parameters Related to RTD-Based Hard Handoff)................................................. 57

4.5.1 EV-DO RTD Hard Handoff Switch (RTDDOHHOSW)....................................................................... 57

4.5.2 Maximum Loop Delay Threshold in the Center (CENTERTHRLD) ................................................... 58

4.5.3 Maximum Loop Delay Threshold at the Border (BORDERTHRLD)................................................... 59

4.5.4 Absolute Threshold of Ec/Io Strength for RTD Hard Handoff at the Border (ECIOTHRLD).............. 60

4.6 Intra-AN Hard Handoff (Parameters Related to DRC Hard Handoff) ........................................................... 60

4.6.1 EV-DO DRC Hard Handoff Switch (DRCDOHHOSW) ...................................................................... 60

4.6.2 Percentage Threshold of DRC Value Being Zero (ZERONUMTHRLD) ............................................. 61

4.6.3 Absolute Threshold of Ec/Io Strength for DRC Hard Handoff (ECIOTHRLD) ................................... 62

4.7 Intra-AN Hard Handoff (Parameters Related to Hard Handoff Based on the Reverse Link Quality)............ 63

4.7.1 EV-DO Link Quality Hard Handoff Switch (LNKDOHHOSW).......................................................... 63

4.7.2 Low Link Quality Hard Handoff PER Threshold (PERGOODTHRLD).............................................. 63

4.7.3 High Link Quality Hard Handoff PER Threshold (PERBADTHRLD) ................................................ 64

4.7.4 Absolute Threshold of Ec/Io Strength for Hard Handoff Based on the Link Quality (ECIOTHRLD) . 65

4.7.5 History Weight of Average History PER (HISPERWGHT).................................................................. 66

4.8 Intra-AN Hard Handoff (Parameters Related to Inter-Frequency Handoff)................................................... 66

4.8.1 EV-DO OFS HHO Switch (OFSDOHHOSW) ..................................................................................... 66

4.8.2 OFS HHO Relative Threshold (RELTHRLD) ...................................................................................... 67

4.9 Intra-AN Hard Handoff (Other Parameters)................................................................................................... 68

4.9.1 Intra-AN Hard Handoff Macro Diversity Switch (INTRAANHHOMACRODIVSW)........................ 68

4.9.2 Maximum Number of Branches for an EV-DO Hard Handoff (DOHHOMAXTARGNUM) .............. 69

4.10 Inter-AN Hard Handoff ................................................................................................................................ 70

4.10.1 Inter-AN Hard Handoff Switch (INTERANHHODIVSW) ................................................................ 70

4.10.2 Whether to Enable Inter-AN Handoff Assisted by AN (ANHOSWITCH) ......................................... 70

4.10.3 EV-DO HHO Delay Switch (DOHHOALGSWDELAY) ................................................................... 71

4.10.4 Neighbor AN Call Transfer Switch (DOSHOSW).............................................................................. 72

4.11 Multi-band HO Parameters........................................................................................................................... 73

4.11.1 EV-DO Inter-Band Hard Handoff Switch (DOMULTIBANDHHOSW)............................................ 73

5 Reverse Power Control Parameters .........................................................................................74

5.1 DO A Power Control Parameters.................................................................................................................... 74

5.1.1 Reverse Target PER (DOAREVPER)................................................................................................... 74

5.1.2 Minimum PCT (MINPCT).................................................................................................................... 75

5.1.3 Maximum PCT (MAXPCT) ................................................................................................................. 75

5.1.4 Initial PCT (INITPCT).......................................................................................................................... 76

5.2 DO 0 Power Control Parameters .................................................................................................................... 77

5.2.1 Reverse Target PER (DOAREVPER)................................................................................................... 77

5.2.2 Minimum PCT (MINPCT).................................................................................................................... 78

5.2.3 Maximum PCT (MAXPCT) ................................................................................................................. 79

5.2.4 Initial PCT (INITPCT).......................................................................................................................... 79

6 Admission Control and Load Control Parameters ...............................................................81

6.1 Hard Assignment Parameters ......................................................................................................................... 81

6.1.1 Carrier Assign Allowed Indicator of EV-DO (ASSALWDO)............................................................... 81

6.1.2 EV-DO Multi Band Assignment Switch (DOMULTIBANDASSIGNSW) .......................................... 82

6.1.3 EV-DO Reverse RSSI Carrier Assignment Switch (DOAREVRSSICARRASSNSW)........................ 83

6.1.4 EV-DO RevA Prevision Priority Assign Carrier Switch (DOAPRVPRIASSSW) ................................ 83

6.1.5 Access Priority Assign Carrier Switch (DOAACCPRIASSSW) .......................................................... 84

6.1.6 EV-DO Assign Carrier Equivalent User Number Threshold (ASSTHRESH) ...................................... 85

6.1.7 EV-DO Assign Carrier Equivalent User Number Relative Threshold (ASSRELATHRESH) .............. 86

6.1.8 EV-DO RevA Carrier Prevision Priority (CARRPRVPRI) ................................................................... 86

6.1.9 Hard Assign Equivalent Subscribers (ASSIGNEQUUSERS) .............................................................. 87

6.1.10 Pilot Priority Level (PLTPL)............................................................................................................... 88

6.2 Admission Control Parameters....................................................................................................................... 89

6.2.1 Access Control High PRI Invade Switch (ACCCTRLINVDSW) ........................................................ 89

6.2.2 Max. VIP Number (MAXVIPNUM) .................................................................................................... 90

6.2.3 Max. Bandwidth of EF Flow (MAXEFFLOWBW) ............................................................................. 90

6.2.4 Max. Bandwidth of EF And AF Flow (MAXEFAFFLOWBW) ........................................................... 91

6.2.5 Max. Slots Occupancy Ratio of EF Flow (MAXEFSLTOCCU) .......................................................... 92

6.2.6 Max. Slots Occupancy Ratio of EF And AF Flow (MAXEFAFSLTOCCU) ........................................ 93

6.2.7 Reverse Activation Bit Threshold (RABTHR) ..................................................................................... 93

6.2.8 Maximum Number of Subscribers of EV-DO Rel0 Carriers (MAX_CHAN_NUM) ........................... 94

6.2.9 Maximum Number of Subscribers of EV-DO RevA Carriers (DOAMAXCHANNUM)..................... 95

6.3 Load Control Parameters................................................................................................................................ 96

6.3.1 Reverse Activation Bit Decision Algorithm (RADESNALG) .............................................................. 96

6.3.2 Reverse Link Silence Period Duration (ReverseLinkSilenceDuration) ................................................ 97

6.3.3 Reverse Link Silence Period (ReverseLinkSilencePeriod) ................................................................... 98

6.3.4 Access Channel Load Control Algorithmic Switch (ACCCHLDCTRLSW)........................................ 98

7 DO Service Parameters ............................................................................................................100

7.1 Rate Limit Parameters.................................................................................................................................. 100

7.1.1 Forward Limited Rate of Private Line Subscribers (FWDLMTRATE) .............................................. 100

7.1.2 Reverse Limited Rate of Private Line Subscribers (REVLMTRATE)................................................ 101

7.1.3 Forward Limited Rate (GRADEFWDLMTRATE)............................................................................. 102

7.1.4 Reverse Limited Rate (REVLMTRATE)............................................................................................ 103

7.2 RLP Parameters............................................................................................................................................ 104

7.2.1 RLP Data Retransmission Wait Timer Length (ABORTTLEN) ......................................................... 104

7.2.2 RLP Flush Timer Length (FLUSHTLEN) .......................................................................................... 104

7.2.3 Inactive Timer Length (INACTIVETLEN) ........................................................................................ 105

7.3 Reverse Frame Processing Parameters......................................................................................................... 106

7.3.1 Reverse Frame Combination Timer Length (RFCOMBINET)........................................................... 106

7.3.2 Reverse Frame Transmission Path Jitter (RPDITHER) ...................................................................... 107

7.3.3 Maximum Number of IDLE Frames Sent (MAXIDLEFRM) ............................................................ 108

7.3.4 IDLE Frame Waiting Timer Length (IDLEFRAMET) ....................................................................... 108

7.3.5 Reverse Frame Waiting Timer Length (IRFRECEIVET) ................................................................... 109

7.3.6 Maximum Number of Abis Handshake Failures (HANDFAILCNT) ................................................. 110

1 Preface

1.1 About This Document

1.1.1 Objective

This document systematically describes the configuration parameters related to Huawei CDMA2000 1xEV-DO Rev.A system in terms of functions. It provides the function, type, related commands, value range, recommended value, and Setting Tradeoff of each parameter.

1.1.2 Intended Audience

This document is intended for engineers who are familiar with the basic concepts of the CDMA2000 1xEV-DO Rev.A system. It serves as a reference for parameter configuration and change.

1.1.3 Organization

This document describes the performance parameters of the CDMA2000 1xEV-DO Rev.A system. It consists of seven chapters and is organized as follows

Section Describes

1 Preface The purpose, intended audience, and organization of this document.

2 System Parameters The parameters related to network identification, location update, and redirection.

3 Channel Parameters The parameters related to control channels, access channels, and RA channels.

4 Handoff Parameters The parameters related to handoff algorithms, handoff decision.

Section Describes

5 Reverse Power Control Parameters

The parameters used in the reverse power control algorithm.

6 Admission Control and Load Control Parameters

The parameters used in the hard assignment, admission control, and load control algorithms.

7 DO Service Parameters The parameters related to DO service processing.

1.1.4 History Record

This document is written by the CDMA Network Performance Research Department and reviewed by the CDMA Network Planning Department. The following table lists the history record of each chapter.

Chapter Name Reviewer of the CDMA Network Planning Department

Experts Outside the CDMA Network Planning Department

Author

Chapter 2 System Parameters

Lv Sha, Cui Yalei, and Jing Xiaoyun

Wang Jianyong, Zhao Xuefei, Yang Weijie, and Zhu Libo

Che Wei and Wu Yufeng

Chapter 3 Channel Parameters

Jing Xiaoyun, Xia Xin, and Jing Xiaoyun


Xi Le and Xu Qiongtao

Chapter 4 Handoff Parameters

Ye Guojun and Deng Zhouyu


Huang Jianzhong and Xi Le

Chapter 5 Reverse Power Control Parameters

Cui Yalei and Jing Xiaoyun


Che Wei and Wu Yufeng

Chapter 6 Admission Control and Load Control Parameters

Wan Rong and Deng Zhouyu


Chen Yanming, Ye Guojun, and Li Wei

Chapter 7 DO Service Parameters

Zhang Ping, Zou Chuanliang, and Deng Zhouyu


Huang Jianzhong and Chen Yanming

1.1.5 References

[1]. C.S0024-A_v3.0_060912.pdf, 3GPP2, 2006

[2]. 1xEV-DO Revision A Parameter Setting Guidelines, Qualcomm, 2006

[3]. 80-W0904-11XEV-DO REVISION A PARAMETER SETTING GUIDELINES .pdf

[4]. 80-H0881-1_F (System_Param for DORev.A&B).pdf

[5]. 80-V9382-1_J_CSM6800_Driver_Parameters.pdf

1.2 Conventions and Descriptions This document is applicable to the MUSA V2R3C03B018SP04 and the PARC V3R1C02B017SP04 of the BSC.

Constraint in this document This document is subject to these technical recommendations and technical notifications.

Description of the items related to parameters

Chapter Name

The parameters described in this document are classified according to their functions. For example, the parameters described in "Forward Load Control" are related to forward power control.

Parameter Name

The name of each parameter is the name of the parameter in the Help of the Service Maintenance System.

Description

This item describes the function of the parameter.

Type

This item describes the type of the parameter, that is, the effect range of the parameter.

Command Line

This item describes the commands that are used to Modify: and Query: the parameter.

Value Range

This item provides the value range of the parameter. The value range is closely related to the specific data structure.

Default Value

This value can be used in general, but it is uncertain that this value can be used in any scenario. The default value is determined based on Setting Tradeoff. The parameter value must be based on the actual needs.

Setting Tradeoff

This item describes the effects of setting the parameter to a high or low value beyond the recommended range.

Remarks

This item introduces the background of each parameter.

1.3 Acronyms and Abbreviations Acronym or Abbreviation

Full Name

BTS Base Transceiver System

BSC Base Station Controller

CDMA Code Division Multiple Access

Ec/Io Pilot energy accumulated over one PN chip period (Ec) to the total power spectral density (Io) in the received bandwidth

FER Frame Error Ratio

SPM SectorParametersMessage

RATI Random Access Terminal Identifier

UATI Unicast Access Terminal Identifier

AT Access Terminal

RUR Route Update Request

QCM QuickConfig Message

2 System Parameters

This chapter describes the parameters related to the QuickConfig Message and the SectorParametersMessage.

2.1 QuickConfig Message

2.1.1 Color Code (COLORCODE)

Description

This parameter is an 8-bit binary number used to identify a subnet and is effective for a DO network only.

Type

It is a parameter at carrier level.

Command Line

Modify: MOD DOQCM/ADD DOCS/MOD DOCS

Query: LST DOQCM

Delete: RMV DOCS

Value Range

0–255

Default Value

0, which must be set according to the actual case.

Setting Tradeoff

None.

Remarks

SectorID104 uniquely identifies a subnet. To save air interface resources, the protocol uses an 8-bit color code to replace SectorID104. The relation between SectorID104 and the color code is specified by the MOD DOCS command. Figure 2-1 shows the mapping between UATIs and color codes.

Figure 2-1 Mapping between color codes and Secotor128

2.1.2 SECTORID24 (SECTORID24)

Description

This parameter is the last 24 bits of SECTORID128. It is used together with the first 104 bits of SECTORID128 to identify a DO carrier. This parameter is effective for the DO network only.

Type


Command Line

Modify: MOD DOQCM

Query: LST DOQCM

Value Range

The value is a hexadecimal numeral that contains up to 6 bits. If the value contains less than 6 bits, digits with a value equal to zero are added to the beginning to obtain a total of 6 bits.

Default Value

It is set according to the actual case.

Setting Tradeoff

None.

Remarks

One AN can be configured with multiple subnets and can be identified by the 128-bit SectorID. The SectorID is sent in the system message QCM.

2.1.3 Redirection Identifier (DOREDIRECT)

Description

This parameter determines whether to allow the access network (AN) to redirect an access terminal (AT) to other networks.

Type


Command Line

Modify: MOD DOQCM

Query: LST DOQCM

Value Range

NO (NO) / YES (YES)

Default Value

NO (NO)

Setting Tradeoff

None.

Remarks

DO redirection can be used for network reselection but can cause the AT to drop from the network. Therefore, do not use this function with caution.

2.2 SectorParametersMessage

2.2.1 Subnet Mask (SUBNETMASK)

Description

This parameter is a string of binary bits used to obtain the subnet ID so as to determine whether the AT spans the subnet.

Type


Command Line

Modify: MOD DOSPM

Query: LST DOSPM

Value Range

0–104

Default Value

It is set according to the actual network setting.

Setting Tradeoff

None.

Remarks

The AT obtains the SectorID128 and the Subnet Mask of the current sector from the system message, and then performs the "AND" calculation to obtain the address of the subnet to which the current sector belongs.

2.2.2 Local Time Offset (DOLTMOFF)

Description

This parameter indicates the offset between the local time and the Greenwich time in the AN. It is in the unit of 30 minutes. When the system sends DOLTMOFF in a message, the unit of this parameter is automatically changed into minutes, indicating a signed integer of 2's complement. The value of this parameter is in Greenwich Mean Time (GMT) format. For example, the time of an eastern time zone is in the format of GMT+time and that of a western time zone is in the format of GMT-time. The time of GMT+8 is GMT+0800 and that of GMT-5 is GMT-0500.

Type


Command Line

Modify: MOD DOSPM

Query: LST DOSPM

Value Range

LF8 (GMT-12 00) to LF56 (GMT+12 00)

For time zones

LF8-8 (GMT-12 00) -- GMT-12

……

LF30-30 (GMT-01 00) -- GMT-01

LF32-32 (GMT+00 00) -- GMT

LF34-34 (GMT+01 00) -- GMT+01

…

LF56-56 (GMT+12 00) -- GMT+12

Default Value

LF48, that is, LF48 (GMT+08 00) indicating the time zone GMT+08.

Setting Tradeoff

This parameter is set according to the time zone of the system.

Remarks

None.

2.2.3 Route Update Radius (ROUTEUP)

Description

This parameter indicates the threshold at which the AT performs the route update.

Type


Command Line

Modify: MOD DOSPM

Query: LST DOSPM

Value Range

0–2047 (seconds)

Default Value

0, which indicates that the route update based on distance is not performed

Setting Tradeoff

If the parameter is set to a value too large, the AT sends a Route Update message after long distance moving. As a result, the route cannot be timely updated and the call drop rate increases. If the parameter is set to a value too small, the AT frequently sends the Route Update message and then access channel load will increase..

Remarks

The distance r is calculated according to the following formula

In the calculation formula, xL refers to the longitude of the sector where the AT sends the Route Update message, yL indicates the latitude of the sector where the AT sends the Route Update message, xC indicates the longitude of the current sector that provides coverage for the AT, yC indicates the latitude of the current sector that provides coverage for the AT, pi indicates the circumference ratio, and ⎣ ⎦ indicates rounding down. xL and yL are measured in 1/4 seconds.

2.2.4 Sector Extended Channel No. Included (ExtendedChannelIncluded)

Description

This parameter indicates whether the SectorParametersMessage sent by the AN carries the extended frequency list.

Type


Command Line

Modify: MOD DOSPM

Query: LST DOSPM

Value Range

YES (user-specified extended frequency list) or NO (system defaults)

Default Value

NO (System defaults)

Setting Tradeoff

None.

Remarks

An AT in DORO mode cannot read the extended frequency list. An AT in DORA mode needs to merge the default frequency list with the extended frequency list and then select the frequency that it will camp on from the merged frequency list using the HASH algorithm.

2.2.5 Sector Extended Frequency List (ExtendedChannel)

Description

This parameter specifies the extended frequency list sent in the SectorParametersMessage.

Type


Command Line

Modify: MOD DOSPM

Query: LST DOSPM

Value Range

0–2047

Default Value

It is set according to the actual case.

Setting Tradeoff

None.

Remarks

When ExtendedChannelIncluded is set to Yes and multiple frequencies are available, the frequencies are separated by a comma (",") in between.

2.2.6 Access Hashing Channel Mask Change Identifier (AccessHashingChannelMaskLstIncluded)

Description

This parameter indicates whether the specified SectorParametersMessage carries the access hashing channel mask list.

Type


Command Line

Modify: MOD DOSPM

Query: LST DOSPM

Value Range

YES (Included), NO (Excluded)

Default Value

NO

Setting Tradeoff

None.

Remarks

The AT merges the default frequency list and the extended frequency list into a new frequency list. If AccessHashingChannelMaskLstIncluded is set to 0, the set of available frequencies is the current frequency list. If AccessHashingChannelMaskLstIncluded is set to 1, the AT performs the "AND" calculation using the negotiation parameter AccessHashingClassMas and the AccessHashingChannelMask of all frequencies, and selects the frequencies that have the most "1" in the results of the "AND" calculation as the set of available frequencies. In this way, different ATs can camp on different frequencies.

2.2.7 Access Hashing Channel Mask List (AccessHashingChannelLstMask)

Description

This parameter indicates the access hashing channel mask list sent in the SectorParametersMessage. The format is ARFCN&CHMASK.

Type


Command Line

Modify: MOD DOSPM

Query: LST DOSPM

Value Range

The mask range is 0–65535; the frequency range is 0–2047

Default Value

0

Setting Tradeoff

None.

Remarks

None.

2.2.8 Route Update Trigger Code Included (RouteUpdateTriggerCodeIncluded)

Description

This parameter indicates whether to carry the route update trigger code in the specified SectorParametersMessage.

Type


Command Line

Modify: MOD DOSPM

Query: LST DOSPM

Value Range


Default Value

YES (Included)

Setting Tradeoff

None.

Remarks

None.

2.2.9 Route Update Trigger Code (RouteUpdateTriggerCode)

Description

This parameter and the subnet ID together identify an entity in the route update trigger list to trigger the Route Update message.

Type


Command Line

Modify: MOD DOSPM

Query:

LST DOSPM

Value Range

0–4095

Default Value

0

Setting Tradeoff

None.

Remarks

RouteUpdateTriggerCode is similar to the RegZone mechanism in 1x networks. It can be used as a paging registration method. The AN carries RouteUpdateTriggerCode and RouteUpdateTriggerMaxAge in the SectorParametersMessage. RouteUpdateTriggerCode indicates the carrier code. RouteUpdateTriggerMaxAge indicates the lifecycle of the code. The AT stores a code list RouteUpdateTriggerCodeList. Each item of the list is (Subnet, RouteUpdateTriggerCode). RouteUpdateTriggerCodeListSize, the length of the list, is determined upon negotiation between the AN and the AT and ranges from 1 to 5.

2.2.10 Maximum Duration of the Route Update Trigger Code Timer (RouteUpdateTriggerMaxAge)

Description

This parameter indicates the longest time that the trigger code list can be kept in the route update trigger code list. When an entity stays in the route update trigger list for more than 2^(RouteUpdateTriggerMaxAge) *.28, the entity is deleted from the route update trigger code list.

Type


Command Line

Modify: MOD DOSPM

Query: LST DOSPM

Value Range

0–15

Default Value

0

Setting Tradeoff

When the value of this parameter is too large, the items (Subnet, RouteUpdateTriggerCode) are kept for a long time and it is difficult to add a Better item (Subnet, RouteUpdateTriggerCode) to the list. When the value of this parameter is too small, however, the AT frequently sends the RUM message and the items (Subnet, RouteUpdateTriggerCode) are frequently updated, causing a heavier CPU load.

Remarks

See the description of RouteUpdateTriggerCode.

2.2.11 Prior Session GAUP (PriorSessionGAUP)

Description

This parameter indicates whether to allow the initiation of Prior Session negotiation through the GAUP.

Type


Command Line

Modify: MOD DOSPM

Query: LST DOSPM

Value Range


Default Value

NO (Excluded)

Setting Tradeoff

None.

Remarks

None.

3 Channel Parameters

3.1 Control Channel Parameters

3.1.1 Control Channel Rate (CCHRATE)

Description

This parameter specifies the rate of the control channels of carriers.

Type


Command Line

Modify: MOD DOCCHP

Query: LST DOCCHP

Value Range

RATE76K8 (76.8kbps), RATE38K4 (38.4kbps)

Default Value

RATE76K8 (76.8 kbps)

Setting Tradeoff

The Control Channel data rate is a tradeoff between a more robust Control Channel and reducing the number of slots needed for transmission of Control Channel information. A

38.4kbps data rate provides a more reliable Control Channel since it uses a repetition factor of 9.6 versus a repetition factor of 4.8 for the 76.8kbps rate.

A Control Channel rate of 76.8kbps requires only 8 slots for a 1024 bit physical layer packet, while the 38.4kbps rate requires 16 slots for the same packet. The reduction in the number of Control Channel Slots needed for a 76.8kbps rates allows those slots to be used for user traffic, thus improving overall data throughput.

A Control Channel Rate of 76.8 kbps is usually sufficiently reliable for ATs that support dual receive diversity.

Remarks

The control channel preamble uses the MAC index to represent the rate used by a control channel packet.

Table 3-1 lists the mapping between MAX indexes and control channel rates.

Table 3-1 Mapping between control channel rates and MAC indexes

MACIndex Control Channel Rate CCH Packet Format

2 76.8 kbps (1024, 8, 512)

3 38.4 kbps (1024, 16, 1024)

3.1.2 Offset of the Control Channel Capsule (CAPSULEOFFSET)

Description

This parameter specifies the offset of the synchronous control channel relative to the control channel cycle, that is, the offset shown in Figure 3-1. With the offset, the start time of a control channel capsule of a sector can be different from the start time of a control channel capsule of an adjacent sector. This reduces interference and increases the probability that the synchronous control capsule is correctly demodulated by the AT.

Figure 3-1 Transmit cycle of the control channel

Type


Command Line

Modify: MOD DOCCHP

Query: LST DOCCHP

Value Range

0–3 in the unit of timeslots

Default Value

0

Setting Tradeoff

Using variable Offsets prevents the Control Channel synchronous capsule of one sector from interfering with the Control Channel synchronous capsule of another sector with a different Offset. Control Channel Offset should be planned such that topographically adjacent sectors should have different values. This way simultaneous Control channel transmissions from adjacent sectors would be avoided and raising the interference levels to all sectors would be avoided as well.

Remarks

The AN should transmit MAC layer packets of a synchronous capsule on the control channel in the following ways

1. The transmission of the first MAC layer is started at the time T. T meets the following equation T mod 256 = Offset.

2. The transmission of the rest MAC layer packets of the synchronous capsule is started at the first T after the previous packet is transmitted. T meets the following equation T mod 4 = Offset.

Here, T is the CDMA system time in the unit of timeslots. The offset is the specified Offset value in the control channel capsule header of the first control channel MAC layer packet in the synchronous capsule.

3.2 Access Channel Parameters

3.2.1 Access Channel Probe Cycle (ACYCLEDURATION)

Description

This parameter specifies the time instants at which the access terminal may start an access probe. An access probe may begin only at times T such that

T mod AccessCycleDuration = 0, where T is the system time in slots.

Type


Command Line

Modify: MOD DOAPM

Query: LST DOAPM

Value Range

SLOT8 (8 TIMESLOTS), SLOT16 (16 TIMESLOTS), SLOT32 (32 TIMESLOTS), SLOT64 (64 TIMESLOTS), SLOT128 (128 TIMESLOTS)

Default Value

SLOT64 (64 TIMESLOTS).

Setting Tradeoff

If this parameter is set too low, the access terminal will send access probes more frequently. This may result in insufficient time diversity between the access probes, resulting in larger number of access probes and higher reverse link interference. If the parameter is set too large, then the access terminal would have to wait longer before sending access probes, resulting in a longer connection setup time.

Remarks

None.

3.2.2 Access Probe Preamble Frame Length (PRBLEN)

Description

This parameter defines the number of frames in an access probe preamble. In each access probe, the pilot portion (I-channel) is enabled first and serves as the preamble. The data portion (Q-channel) is enabled after PreambleLength frames, that is, after PreambleLength*16 timeslots.

Type


Command Line

Modify: MOD DOAPM

Query: LST DOAPM

Value Range

1–7 in 16 timeslots

Default Value

2

Setting Tradeoff

If the parameter is set too low, then the access network may not be able to reliably detect the access probes, requiring the access terminal to transmit larger number of access probes causing additional reverse link interference. A low setting may also impact resources at the base station since additional CSM resources may be required to detect shorter preambles. If set too high, Access Channel capacity is wasted as a smaller preamble size would have been sufficient.

Remarks

None.

3.2.3 Maximum Capsule Length (CAPSULELENMAX)

Description

This parameter defines the maximum number of frames in an Access Channel capsule.

Type


Command Line

Modify: MOD DOAPM

Query: LST DOAPM

Value Range

2–7 in 16 timeslots

Default Value

2

Setting Tradeoff

This parameter specifies the maximum capsule length. The actual capsule length can be smaller depending on the message that is being transmitted. There is no disadvantage in setting this to a larger value, but typically 2 frames is enough to carry all messages.

Remarks

None.

3.2.4 AT Open Loop Power Estimation (OLOOPADJUST)

Description

This parameter specifies the adjustment to nominal power to be used by an access terminal in the open loop power estimate. The AT uses this parameter to estimate the average open loop output power (X0) of the pilot channel in an access probe. X0 is calculated according to the following formula

X0 = –Mean Received Power (dBm) + OpenLoopAdjust + ProbeInitialAdjust

Type


Command Line

Modify: MOD DOAPM

Query: LST DOAPM

Value Range

0–255 in -1 dB

Default Value

74

Setting Tradeoff

If this engineering value is set too high, then the access terminal will transmit the access probes at a very high power, causing unnecessary interference. If the engineering value is set too low, then the access terminal would transmit at a very low power, and the access network may not be able to reliably detect them. As a result, the loading on the Access Channel would be higher with a consequently increased probability of collisions.

Remarks

None.

3.2.5 Open Loop Power Estimate Correction Factor (PRBINIADJUST)

Description

This parameter defines the power correction factor of the first access probe in the access probe sequence. It is used with AT Open Loop Power Estimation (OLOOPADJUST) to calculate the average open loop output power. For details, see the description of OLOOPADJUST.

Type


Command Line

Modify: MOD DOAPM

Query: LST DOAPM

Value Range

-16 to 15 in the unit of dB

Default Value

0

Setting Tradeoff

If this parameter is set too low, then the access terminal would transmit the access probes at a very low power, and the access network may not be able to reliably detect them. As a result, the loading on the Access Channel would be higher with a consequently increased probability of collisions. If this parameter is set too high, then the access terminal would transmit the access probes at a very high power, causing unnecessary interference.

Remarks

None.

3.2.6 Maximum Number of Access Probes (PRBNUMSTEP)

Description

This parameter specifies the maximum number of access probes that can be transmitted by access terminals in a single access probe sequence. Figure 3-2 shows the structure of an access probe sequence. In the access probe sequence, Np is the maximum number of access probes and Ns is the maximum number of access probe sequences in an access attempt.

Figure 3-2 Structure of an access probe sequence

Type


Command Line

Modify: MOD DOAPM

Query: LST DOAPM

Value Range

1–15

Default Value

5

Setting Tradeoff

If this parameter is set too low, the access terminal may send too few probes to be reliably detected by the access network, resulting in unnecessarily failed or delayed access attempts. If this parameter is set too high, reverse link interference will be increased. A high setting also may also impact the performance of a hybrid AT since the AT will not tune away to the 1x network during the access attempt.

Remarks

PWRSTEP and PRBNUMSTEP are correlated and need to be set together.

3.2.7 Probe Power UP Step (PWRSTEP)

Description

This parameter defines the increase in power between successive probes within the same sequence, in resolution of 0.5 dB. The AT sends the pilot channel of the (i)th access probe in an access probe sequence using the power X0 + (i-1)* PowerStep.

Type


Command Line

Modify: MOD DOAPM

Query: LST DOAPM

Value Range

0-15 in 0.5 dB

Default Value

8

Setting Tradeoff

If this parameter is set too low, then the access terminal may need to send more access probes, resulting in an increased loading on the Access Channel and a consequent increased probability of collisions. If this parameter is set too high, then there will be a higher probability of the access probes being detected at the expense of increased interference on the reverse link.

Remarks

None.

3.2.8 Access Persistence Vector 0/1/2/3 (PERSISTENCE0/1/2/3)

Description

This parameter defines the Access Persistence value of the users of classes 0, 1, 2, and 3. The AT determines the access probability based on the APersistence value.

Type


Command Line

Modify: MOD DOAPM

Query: LST DOAPM

Value Range

Hexadecimal numerals with equal to or smaller than two digits. The maximum value is 0x3F, at which the access is forbidden.

Default Value

0x00

Setting Tradeoff

If this parameter is set lower than the recommended value (i.e. set to 0), then the access terminal would always pass the persistence test. This reduces the randomness in the access procedure, and may result in more collisions. If this parameter is set too high, then it would be harder for the access terminal to pass the persistence test, leading to unnecessarily long access delays.

Remarks

Before the first probe of a sequence is sent, the AT must detect persistence. An even distribution random number x (0 < x < 1) is generated. Compare x to the persistence possibility p. If x < p, detection succeeds. If the number of persistence detection success or failure times exceeds 4/p, the AT can be sent within the access channel cycle. If p is not equal to 0, the AT must repeat the preceding persistence detection from the beginning of next access channel cycle. If p is equal to 0, the AT cannot access the network.

3.2.9 Access Marco Diversity Switch (ACCMACRODIVSWITCH)

Description

This parameter indicates whether to enable the access macro diversity function.

Type

It is a parameter at module level.

Command Line

Modify: MOD DOHO

Query: LST DOHO

Value Range

ON (ON), OFF (OFF)

Default Value

ON(ON)

Setting Tradeoff

In an area where pilot pollution is severe, the access macro diversity function can be enabled to improve the access probability.

Remarks

The access macro diversity function refers to establishing multiple branches for the AT so that the AT directly enters the soft handoff status.

3.2.10 Enhanced Access Parameters Included (ENHACCPARAIND)

Description

This parameter specifies whether to support enhanced access parameters. The parameters described in sections 4.2.11 through 4.2.16 are enhanced access parameters.

Type


Command Line

Modify: MOD DOAPM

Query: LST DOAPM

Value Range

YES (INCLUDED), NO (NOINCLUDED)

Default Value

YES (INCLUDED)

Setting Tradeoff

None.

Remarks

None.

3.2.11 Slot-Based Access Preamble Length (PREAMBLELENSLOT)

Description

This parameter defines the access preamble length in the unit of timeslots.

Type


Command Line

Modify: MOD DOAPM

Query: LST DOAPM

Value Range

Slot4 (4TIMESSLOTS), Slot16 (16TIMESSLOTS) in the unit of timeslots

Default Value

Slot4 (4TIMESSLOTS)

Setting Tradeoff

If this parameter is set to a value too large, the probability of access success of the AT increases and the access time is shortened. This, however, increases the reverse power of the AT and the reverse interference of the system and lowers the reverse capacity of the system. This parameter takes effect in the Enhanced Access Channel Protocol.

Remarks

For a DO A terminal, the priority of this parameter is higher than the access probe preamble length parameter PRBLEN, that is, the DO A terminal uses the access preamble length defined by PREAMBLELENSLOT. Otherwise, the DO A terminal uses the access preamble length defined by PRBLEN.

3.2.12 Maximum Rate of Access Channel (SECTORACCMAXRATE)

Description

This parameter defines the maximum data rate at which the access terminal is allowed to transmit on the access channel.

Type


Command Line

Modify: MOD DOAPM

Query: LST DOAPM

Value Range

kbps96 (9.6 kbps), kbps192 (19.2 kbps), kbps384 (38.4 kbps)

Default Value

kbit/s384 (38.4 kbps)

Setting Tradeoff

If this parameter is set to a value too large, the access rate of the access channel is improved but reverse interference increases and the capacity is reduced. If this parameter is set to a value too small, data can be split into multiple MAC packets before it is sent and the access time is prolonged.

Remarks

To send data on an access channel, the AT must do the following

1. Determine the maximum transmission rate.

2. Determine the final transmit rate according to the payload of the maximum transmission rate and the actual data size. The actual data size must be equal to or greater than the minimum payload size of the selected transmission rate and equal to or smaller than the maximum payload. The following table lists the mapping between transmission rates and payload.

3.2.13 Probe Timeout Adjustment (PROBETIMEOUTADJUST)

Description

This parameter specifies the timeout adjustment of each access probe. It is used to calculate the sending time of an access probe.

Type


Command Line

Modify: MOD DOAPM

Query: LST DOAPM

Value Range

SLOT0 (OTIMESLOT), 16 SLOT16 (16TIMESLOT), 32, 48, 64, 80, 92, 112 in time slots

Default Value

SLOT0 (OTIMESLOT)

Setting Tradeoff

None.

Remarks

During the calculation of the sending time of the next access probe, PROBETIMEOUTADJUST must be subtracted on the basis of the probe back-off.

3.2.14 Nominal Pilot Strength (PILOTSTRNOMINAL)

Description

This parameter specifies the reference pilot strength used during the estimation of open loop output power of the AT. The AT compares the actual pilot strength with the value of PILOTSTRNOMINAL to determine its open loop output power.

Type


Command Line

Modify: MOD DOAPM

Query: LST DOAPM

Value Range

DBN4(-4dB), DBN 3(-3dB), DBN 2(-2dB), DBN 1(-1dB), DB 0(0dB), DB 1(1dB), DB 2(2dB), DB3(3dB),in the unit of dB

Default Value

DB0 (0 dB)

Setting Tradeoff

This parameter needs to be set according to OLOOPADJUST and PRBINIADJUST. If this parameter is set to a value too large, the access power is too large and the reverse load of the sector increases. If this parameter is set to a value too small, the access time increases when interference exists in the sector.

Remarks

The current pilot strength is taken into consideration of the open loop power estimate. In this way, the access duration is not increased, although the initial power estimate is excessively small due to great interference.

3.2.15 Maximum Pilot Strength Correction (PILOTSTRCORTMAX)

Description

This parameter specifies the maximum pilot strength correction used during the estimation of open loop output power of the AT.

Type


Command Line

Modify: MOD DOAPM

Query: LST DOAPM

Value Range

DB0(0dB), DB 1(1dB), DB 2(2dB), DB3(3dB)1, DB4(4dB), DB5(5dB) in the unit of dB

Default Value

DB0 (0 dB)

Setting Tradeoff

If this parameter is set to a low value, the open loop power estimate is insufficient when the pilot interference increases. The access delay increases, and an access failure may occur.

Remarks

None.

3.2.16 Minimum Pilot Strength Correction (PILOTSTRCORTMIN)

Description

This parameter defines the minimum pilot strength correction during the estimation of open loop output power of the AT.

Type

It is a parameter at carrier level. It is an enhanced MAC protocol parameter for the access channel.

Command Line

Modify: MOD DOAPM

Query: LST DOAPM

Value Range

DB0(0dB), DBN 1(-1dB), DBN 2(-2dB), DBN 3(-3dB), DBN 4(-4dB), DBN 5(-5dB) in the unit of dB

Default Value

DB0 (0 dB)

Setting Tradeoff

If this parameter is set to a high value, the open loop power estimate is too large when the pilot strength is reduced. The reverse interference increases.

Remarks

None.

3.3 RA Channel Parameters

3.3.1 RAB Length (RAB_LENGTH)

Description

This parameter indicates the number of timeslots used for sending the reverse active bit (RAB) of the EV-DO Rel0 carrier. It is effective for DO 0 terminals only.

Type


Command Line

Modify: MOD DOSP

Query: LST DORRMP

Value Range

8, 16, 32, 64 in the unit of timeslots

Default Value

8

Setting Tradeoff

If this parameter is set low, the AT can quickly react to reverse link changes detected by the AN. If this parameter is set high, the AT’s response time is slower, but results in less ROT variations.

Remarks

The RAB is transmitted through the RA channel which is the sub-channel of forward Medium Access Control (MAC) channel. The allocated MAC Index of the RA channel is 4.

3.3.2 RAB Offset (RAB_OFFSET)

Description

This Parameter indicates the starting slot of the Reverse Activity bits. This parameter is effectively for EVDO Rel0 systems only. The sending timeslot of the AT is RABOffset x RABLength / 8.

Type


Command Line

Modify: MOD DOSP

Query: LST DORRMP

Value Range

0 to 7

Default Value

Different values are allocated for adjacent sectors. The default value is 0.

Setting Tradeoff

Distinct RAB Offsets on adjacent sectors minimizes oscillations, which can occur if neighboring sectors decrease rate (RAB=1) at the same time and then all increase rate (RAB=0) at the same time. Avoiding synchronization of the AT rate changes lowers variations in ROT, which may lead to increased capacity and stability.

Remarks

RABLength and RABOffset are no longer used in an EV-DO RevA system.

3.3.3 Reverse Active Channel Gain (RACGAIN)

Description

This parameter specifies the reverse active channel gain.

Type


Command Line

Modify: MOD DOSP

Query: LST DORRMP

Value Range

DBN6 (-6 dB)/ DBN 9 (-9 dB)/ DBN 12 (-12 dB)/ DBN 15 (-15 dB)

Default Value

DBN 12 (-12 dB)

Setting Tradeoff

If this parameter is set to a large value, the RA channel can be more correctly demodulated. Remarks

None.

4 Handoff Parameters

4.1 Co-Channel Pilot Set Management

4.1.1 Maximum Branch Number for Active Set (HOMAXBRANCHNUM)

Description

This parameter indicates the maximum number of branches in the active set for soft handoff.

Type


Command Line

Modify: MOD DOHO

Query: LST DOHO

Value Range

2–6

Default Value

3

Setting Tradeoff

If this parameter is set to a large value, the transmission performance of the reverse link of a single AT is improved but fewer subscribers can be supported in the system. If this parameter is set to a small value, the transmission performance of the reverse link of a single AT degrades but more subscribers can be supported in the system.

Remarks

None.

4.1.2 Whether to Allow a Soft Handoff in the Case of Different Active Sets (DIFFASSWITCH)

Description

This parameter indicates whether to trigger soft handoff when the active set of the AT is different from the active set of the AN.

Type


Command Line

Modify: MOD DOHO

Query: LST DOHO

Value Range

YES (ALLOWED), NO (PROHIBITED)

Default Value

YES (ALLOWED)

Setting Tradeoff

If the active set of the AT is different from the active set of the AN and soft handoff is not permitted, handoff can be delayed or call drop can be caused.

Remarks

None.

4.2 Pilot Search Management

4.2.1 Search Window Size Contain Flag (NSRCHWININC)

Description

This parameter indicates whether the size of the neighbor set search window is included in the SPM. If the size of the neighbor search window is included in the message, AT will use NSRCHWINSIZE as its neighbor set search window size. If it is not included in the message, AT will use a negotiation parameter as its neighbor set search window size.

Type


Command Line

Modify: MOD NBRPARA

Query: LST NBRPARA

Value Range

YES, NO

Default Value

NO

Setting Tradeoff

None.

Remarks

None.

4.2.2 Search Window Size (NSRCHWINSIZE)

Description

This parameter specifies the search window size for the neighbor set branch used by the AT in idle state. If NeighborSearchWindowSizeIncluded is set to 0, this parameter is ineffective. If NeighborSearchWindowSizeIncluded is set to 1, NSRCHWINSIZE is the search window size used by the pilots of neighbor cells.

Type


Command Line

Modify: MOD NBRPARA

Query: LST NBRPARA

Value Range

4 chips, 6 chips, 8 chips, 10 chips, 14 chips, 20 chips, 28 chips, 40 chips, 60 chips, 80 chips, 100 chips, 130 chips, 160 chips, 226 chips, 320 chips, 452 chips

Default Value

60 chips

Setting Tradeoff

If the parameter is set too low, usable multipath may be missed. In addition, the interrupt frequency (by fingers declaring the end of search) is increased, thereby affecting the performance of the access terminal. If the parameter is set too high, the access terminal searcher may pick up pilots other than the intended one. In addition, a high setting requires longer search time, unnecessarily impacting performance.

Remarks

For the pilots in the active set, the AT centers the search window on the earliest usable multipath. Each pilot in the neighbor set uses the timing defined by AT time reference. The AT can center the search window on the pilot PN sequence offset plus the search window offset defined in the NeighborSearchWindowOffset field.

4.2.3 Search Window Offset Included Flag (NSRCHWINOFFSETINC)

Description

This parameter specifies whether the SPM includes the search window offset for the neighbor set branch. If it is included, NSRCHWINOFFSET is used for searching. If it is not included, the default search window offset is used for the neighbor set branch.

Type


Command Line

Modify: MOD NBRPARA

Query: LST NBRPARA

Value Range

YES, NO

Default Value

NO

Setting Tradeoff

None.

Remarks

None.

4.2.4 Search Window Offset of Neighbor Set Branch (NSRCHWINOFFSET)

Description

This parameter specifies the search window offset for the neighbor set branch used by the AT in idle state.

Type


Command Line

Modify: MOD NBRPARA

Query: LST NBRPARA

Value Range

0–6

All Offset values are enumerated in a list on the maintenance console.

Table 2 lists the mapping between the values of air interface messages and the values of the search window offset.

Table 4-1 Search window offset coding

SearchWindowsOffset Offset (PN Chips)

0 0

1 WindowSize26/2

2 WindowSize

3 3*WindowSize/2

4 -WindowSize/2

5 -WindowSize

6 -3*WindowSize/2

7 Spare

Default Value

0

Setting Tradeoff

None.

Remarks

NSRCHWINOFFSET and NSRCHWINSIZE determine the center of the search window.

4.2.5 Search Window Size of Neighbor Set Branch Included (NSRCHWININC)

Description

This parameter indicates whether the size of the neighbor search window is included in the neighbor list message. If the size of the neighbor search window is included in the neighbor list message, NSRCHWINSIZE is used for searching. If it is not included in the neighbor list message, a negotiation parameter is used for searching.

Type


Command Line

Modify: MOD DONBRPARA

Query: LST DONBRPARA

Value Range

YES, NO

Default Value

NO

Setting Tradeoff

None.

Remarks

None.

4.2.6 Search Window Size of Neighbor Set Branch (NSRCHWINSIZE)

Description

This parameter specifies the search window size for the neighbor set branch used by the AT in service state. If SearchWindowSizeIncluded is set to 0, this parameter is ineffective. If SearchWindowSizeIncluded is set to 1, NSRCHWINSIZE is the search window size used by the pilots of neighbor cells.

Type


Command Line



Value Range

4 chips, 6 chips, 8 chips, 10 chips, 14 chips, 20 chips, 28 chips, 40 chips, 60 chips, 80 chips, 100 chips, 130 chips, 160 chips, 226 chips, 320 chips, 452 chips

Default Value

60 chips

Setting Tradeoff

See the description of NSRCHWINSIZE.

Remarks

See the description of NSRCHWINSIZE.

4.2.7 Search Window Offset of Neighbor Set Branch Included (NSRCHWINOFFSETINC)

Description

This parameter specifies whether the neighbor list message includes the search window offset for the neighbor set branch. If the search window offset is included, use NSRCHWINOFFSET for searching. If the search window offset is not included, use the default search window offset for the neighbor set branch.

Type


Command Line



Value Range

YES, NO

Default Value

NO

Setting Tradeoff

None.

Remarks

None.

4.2.8 Search Window Offset of Neighbor Set Branch (NSRCHWINOFFSET)

Description

This parameter specifies the search window offset for the neighbor set branch used by the AT in service state.

Type


Command Line



Value Range

0–6 (Table 2 lists the mapping between the values of air interface messages and the values of the search window offset)

Default Value

0

Setting Tradeoff

None.

Remarks

NSRCHWINOFFSET and the PN offset determine the center of the search window.

4.3 Virtual Soft Handoff

4.3.1 Virtual Soft Handoff Monitor Timer Length (SHOMONITORT)

Description

This parameter defines the maximum duration of virtual soft handoff.

Type

It is a parameter at subrack level.

Command Line

Modify: MOD DOSDUPARA

Query: LST DOSDUPARA

Value Range

1–10 in seconds

Default Value

3

Setting Tradeoff

If this parameter is set to a value too small, the success rate of soft handoff can be lowered. If this parameter is set to a value too large, the system waiting time can increase.

Remarks

None.

4.4 Intra-AN Hard Handoff (Parameters Related to EV-DO Intra-Frequency Hard Handoff)

4.4.1 EV-DO Intra-Frequency Hard Handoff Switch (SFDOHHOSW)

Description

This parameter indicates whether to enable EV-DO intra-frequency hard handoff.

Type


Command Line

Modify: MOD DOPHOALG

Query: LST DFNBRPARA

Value Range

ON (ON), OFF (OFF)

Default Value

OFF (OFF)

Setting Tradeoff

None.

Remarks

None.

4.4.2 Relative Threshold of Co-Frequency Hard Handoff (RELATHRESH)

Description

This parameter defines the minimum strength difference between the target active set of co-frequency hard handoff and the target active set of soft handoff for triggering co-frequency hard handoff. When the strength difference between the target active set of co-frequency hard handoff and the target active set of soft handoff is higher than the value of this parameter, co-frequency hard handoff is triggered.

Type


Command Line

Modify: MOD DOHHOSF

Query: LST DORRMP

Value Range

0 to 63 in 0.5 dB

Default Value

5 (2.5 dB)

Setting Tradeoff

If the value of this parameter is smaller, it is easier to trigger co-frequency hard handoff.

Remarks

None.

4.4.3 Outgoing Handoff Threshold of Intra-Frequency Hard Handoff (SRCABSTHRESH)

Description

This parameter defines the pilot strength of the AT required for co-frequency hard handoff from the source cell to the target cell.

Type


Command Line

Modify: MOD DOHHOSF

Query: LST DORRMP

Value Range

0 to 63 in -0.5 dB

Default Value

8 (-4 dB)

Setting Tradeoff

None.

Remarks

None.

4.4.4 Handoff Threshold of the Target Carrier Handoff of the Intra-frequency Hard Handoff (TRGABSTHRESH)

Description

This parameter defines the signal strength of the target cell for triggering co-frequency hard handoff.

Type


Command Line

Modify: MOD DOHHOSF

Query: LST DORRMP

Value Range

0 to 63 in -0.5 dB

Default Value

4

Setting Tradeoff

If this parameter is set to a value too small, co-frequency hard handoff can be easily triggered but the radio environment of the AT cannot be guaranteed after the handoff. If this parameter is set to a value too large, co-frequency hard handoff is hard to trigger but the radio environment of the AT can be guaranteed after the handoff.

Remarks

None.

4.5 Intra-AN Hard Handoff (Parameters Related to RTD-Based Hard Handoff)

4.5.1 EV-DO RTD Hard Handoff Switch (RTDDOHHOSW)

Description

This parameter specifies whether to enable DO RTD hard handoff.

Type


Command Line



Value Range

ON (ON), OFF (OFF)

Default Value

OFF (OFF)

Setting Tradeoff

None.

Remarks

None.

4.5.2 Maximum Loop Delay Threshold in the Center (CENTERTHRLD)

Description

This parameter specifies the maximum loop delay threshold in the center of RTD hard handoff.

Type


Command Line

Modify: MOD DOHHORTD

Query: LST DORRMP

Value Range

0–65535 in chips

Default Value

20

Setting Tradeoff

If this parameter is set to a larger value, the distance from the hard handoff area to the source cell is larger and the hard handoff is triggered later. If this parameter is set to a smaller value, the distance from the hard handoff area to the source cell is smaller and the hard handoff is triggered earlier.

Remarks

None.

4.5.3 Maximum Loop Delay Threshold at the Border (BORDERTHRLD)

Description

This parameter specifies the maximum loop delay threshold at the border.

Type


Command Line


Query: LST DORRMP

Value Range

0–65535 in chips

Default Value

50

Setting Tradeoff

This parameter should be set along with CENTERTHRLD.

Remarks

None.

4.5.4 Absolute Threshold of Ec/Io Strength for RTD Hard Handoff at the Border (ECIOTHRLD)

Description

This parameter specifies the Ec/Io strength required for RTD hard handoff of the AT in the center of RTD hard handoff.

Type


Command Line


Query: LST DORRMP

Value Range

-63 to 0 in 0.5 dB

Default Value

-4 (-2 dB)

Setting Tradeoff

If this parameter is set to a value too large, handoff can be delayed. If this parameter is set to a value too small, hard handoff takes place at an earlier time and as a result the target BTS may fail to capture the signal of the AT.

Remarks

None.

4.6 Intra-AN Hard Handoff (Parameters Related to DRC Hard Handoff)

4.6.1 EV-DO DRC Hard Handoff Switch (DRCDOHHOSW)

Description

This parameter specifies whether to enable DO DRC hard handoff.

Type


Command Line



Value Range

ON (ON), OFF (OFF)

Default Value

OFF (OFF)

Setting Tradeoff

None.

Remarks

None.

4.6.2 Percentage Threshold of DRC Value Being Zero (ZERONUMTHRLD)

Description

This parameter defines the threshold of the percentage of DRC Values being zero to trigger DRC hard handoff.

Type


Command Line

Modify: MOD DOHHODRC

Query: LST DORRMP

Value Range

0–100 in %

Default Value

20

Setting Tradeoff

If this parameter is set to a value too large, hard handoff can be triggered at a time too late and thus hard handoff may fail. If this parameter is set to a value too small, hard handoff may take place at a time too early and thus the target BTS may fail to capture the signal of the AT.

Remarks

None.

4.6.3 Absolute Threshold of Ec/Io Strength for DRC Hard Handoff (ECIOTHRLD)

Description

This parameter specifies the Ec/Io strength for triggering RTD hard handoff.

Type


Command Line

Modify: MOD DOHHODRC

Query: LST DORRMP

Value Range

-63 to 0 in 0.5 dB

Default Value

-4

Setting Tradeoff

If this parameter is set to a larger value, it is more difficult to trigger hard handoff. If this parameter is set to a smaller value, it is easier to trigger hard handoff.

Remarks

None.

4.7 Intra-AN Hard Handoff (Parameters Related to Hard Handoff Based on the Reverse Link Quality)

4.7.1 EV-DO Link Quality Hard Handoff Switch (LNKDOHHOSW)

Description

This parameter specifies whether to enable hard handoff based on the DO link quality.

Type


Command Line



Value Range

ON (ON), OFF (OFF)

Default Value

OFF (OFF)

Setting Tradeoff

None.

Remarks

None.

4.7.2 Low Link Quality Hard Handoff PER Threshold (PERGOODTHRLD)

Description

This parameter defines the lower PER threshold of hard handoff based on the link quality.

Type


Command Line

Modify: MOD DOHHOLQ

Query: LST DORRMP

Value Range

0–1000 in 0.10%

Default Value

50

Setting Tradeoff


Remarks

None.

4.7.3 High Link Quality Hard Handoff PER Threshold (PERBADTHRLD)

Description

This parameter defines the upper PER threshold for triggering hard handoff based on the link quality.

Type


Command Line

Modify: MOD DOHHOLQ

Query: LST DORRMP

Value Range

0–1000 in 0.10%

Default Value

500

Setting Tradeoff


Remarks

None.

4.7.4 Absolute Threshold of Ec/Io Strength for Hard Handoff Based on the Link Quality (ECIOTHRLD)

Description

This parameter defines the absolute threshold of the Ec/Io strength for triggering hard handoff based on the link quality.

Type


Command Line

Modify: MOD DOHHOLQ

Query: LST DORRMP

Value Range

-63 to 0 in 0.5 dB

Default Value

-4

Setting Tradeoff

The larger value of this parameter, the more difficult to trigger hard handoff. The smaller value of this parameter, the easier to trigger hard handoff.

Remarks

None.

4.7.5 History Weight of Average History PER (HISPERWGHT)

Description

This parameter specifies the weight of the average history PER during the calculation of the average history PER.

Type


Command Line

Modify: MOD DOHHOLQ

Query: LST DORRMP

Value Range

0–100 in 0.01

Default Value

50

Setting Tradeoff

If this parameter is set to a larger value, the history PER has greater influence on the handoff trigger condition. If this parameter is set to a smaller value, the history PER has greater influence on the current instantaneous PER on the handoff trigger condition.

Remarks

None.

4.8 Intra-AN Hard Handoff (Parameters Related to Inter-Frequency Handoff)

4.8.1 EV-DO OFS HHO Switch (OFSDOHHOSW)

Description

This parameter indicates the state of the EV-DO inter-frequency hard handoff switch.

Type


Command Line



Value Range

ON (ON), OFF (OFF)

Default Value

OFF (OFF)

Setting Tradeoff

None.

Remarks

When the switch is on, hard handoff is performed when the inter-frequency hard handoff trigger condition is met.

4.8.2 OFS HHO Relative Threshold (RELTHRLD)

Description

This parameter defines the relative threshold for the Ec/Io strength for triggering OFS hard handoff.

Type


Command Line

Modify: MOD DOHHOOFS

Query: LST DORRMP

Value Range

0–63 in 0.5 dB

Default Value

5

Setting Tradeoff

None.

Remarks

None.

4.9 Intra-AN Hard Handoff (Other Parameters)

4.9.1 Intra-AN Hard Handoff Macro Diversity Switch (INTRAANHHOMACRODIVSW)

Description

This parameter specifies whether intra-AN hard handoff macro diversity is allowed, that is, whether multiple hard handoff targets are allowed during a hard handoff of the calls on this module.

Type


Command Line

Modify: MOD DOHO

Query: LST DOHO

Value Range

ON (ON), OFF (OFF)

Default Value

ON (ON)

Setting Tradeoff

When the hard handoff macro diversity function is enabled, the AT can switch to multiple target carriers in a hard handoff. In this way, the soft handoff gain is timely utilized and the

hard handoff success rate is improved. If too many target carriers are configured for a hard handoff, however, too many resources can be transiently occupied.

Remarks

None.

4.9.2 Maximum Number of Branches for an EV-DO Hard Handoff (DOHHOMAXTARGNUM)

Description

This parameter specifies the maximum number of branches for the target active set in a hard handoff. According to the protocol, the active set of an AT supports up to six branches.

Type


Command Line

Modify: MOD DOHO

Query: LST DOHO

Value Range

1 to 6

Default Value

6

Setting Tradeoff

None.

Remarks

None.

4.10 Inter-AN Hard Handoff

4.10.1 Inter-AN Hard Handoff Switch (INTERANHHODIVSW)

Description

This parameter specifies whether to enable inter-AN hard handoff.

Type


Command Line

Modify: MOD DOHO

Query: LST DOHO

Value Range

ON (ON), OFF (OFF)

Default Value

OFF (OFF)

Setting Tradeoff

None.

Remarks

None.

4.10.2 Whether to Enable Inter-AN Handoff Assisted by AN (ANHOSWITCH)

Description

This parameter indicates whether to enable inter-AN handoff assisted by the AN.

Type


Command Line

Modify: MOD DOHO

Query: LST DOHO

Value Range

ON (ON), OFF (OFF)

Default Value

ON (ON)

Setting Tradeoff

None.

Remarks

Decision on inter-AN handoff assisted by the AN means that the AN determines when to set up the new connection and then releases the original connection.

4.10.3 EV-DO HHO Delay Switch (DOHHOALGSWDELAY)

Description

This parameter works on the target side of EV-DO hard HOs. If this parameter is set to ON, an AT that is handed off to the target side must delay its next hard HO to avoid ping-pong HO.

Type

It is an internal general parameter at module level.

Command Line

Modification: MOD DOHO

Query: LST DOHO

Value Range

ON (ON), OFF (OFF)

Default Value

ON (ON)

Setting Tradeoff

None.

Remarks

None.

4.10.4 Neighbor AN Call Transfer Switch (DOSHOSW)

Description

This parameter defines a switch for call migration between adjacent ANs.

Type

It is an internal general parameter at BSC level.

Command Line

Modification: MOD NBRAN

Query: LST NBRAN

Value Range

ON (ON), OFF (OFF)

Default Value

OFF (OFF)

Setting Tradeoff

None.

Remarks

None.

4.11 Multi-band HO Parameters

4.11.1 EV-DO Inter-Band Hard Handoff Switch (DOMULTIBANDHHOSW)

Description

This parameter indicates whether to enable inter-band hard HOs.

Type

It is a general parameter at carrier level.

Command Line

Modification: MOD DOPHOALG

Query: LST DORRMP

Value Range

ON (ON), OFF (OFF)

Default Value

OFF (OFF)

Setting Tradeoff

None.

Remarks

Coverage differences between bands should be considered during inter-band hard HOs.

5 Reverse Power Control Parameters

5.1 DO A Power Control Parameters

5.1.1 Reverse Target PER (DOAREVPER)

Description

This parameter indicates the package error rate (PER) value that the reverse data of the AT expects. The PER refers to the ratio of the data packets received with errors to the total data packets received.

Type


Command Line

Modify: MOD DOARPCP

Query: LST DORRMP

Value Range

RPER1 (0.1)–RPER300 (30) in 0.1%

Default Value

RPER10 (1), that is, 1%

Setting Tradeoff

When setting the reverse target PER, ensure a tradeoff between the reverse transmit power and the system load. If this parameter is set to a low value, the transmit power of the AT is high and the reverse load of the system increases.

Remarks

The reverse PER affects the sector throughput.

5.1.2 Minimum PCT (MINPCT)

Description

This parameter indicates the minimum power control threshold (PCT) value allowed for outer loop power control.

Type


Command Line

Modify: MOD DOARPCP

Query: LST DORRMP

Value Range

-28672 to -12416 in 1/1024 dB

Default Value

- 22016, that is, -21.5 dB

Setting Tradeoff

The same target PER is converged. The PCT value varies with link status, such as the change in soft handoff branches. Thus, the PCT is changed dynamically, which is defined by MINPCT and MAXPCT.

Remarks

The minimum PCT value, the initial PCT value, and the maximum PCT value must meet the following inequalities Minimum PCT value ≤ Initial PCT value ≤ Maximum PCT value.

5.1.3 Maximum PCT (MAXPCT)

Description

This parameter indicates the maximum PCT value allowed for outer loop power control.

Type


Command Line

Modify: MOD DOARPCP

Query: LST DORRMP

Value Range

- 28672 to -12416 in 1/1024 dB

Default Value

- 17920, that is, -17.5 dB

Setting Tradeoff

This parameter and MINPCT define the dynamic change range of PCT.

Remarks


5.1.4 Initial PCT (INITPCT)

Description

This parameter indicates the initial PCT value for outer loop power control. During power control, the BSC adjusts the PCT value between MINPCT and MAXPCT from time to time.

Type


Command Line

Modify: MOD DOARPCP

Query: LST DORRMP

Value Range

- 28672 to -12416 in 1/1024 dB

Default Value

- 18432, that is, -18 dB

Setting Tradeoff

If this parameter is set to a large value, the number of reverse error packets is reduced in the initial call setup phase and the reverse PER is thus guaranteed. If this parameter is set to a small value, the PER is high in the initial call setup phase.

Remarks


5.2 DO 0 Power Control Parameters

5.2.1 Reverse Target PER (DOAREVPER)

Description

This parameter indicates the Package Error Rate (PER) value that the reverse data of the AT expects. The PER refers to the ratio of the data packets received with errors to the total data packets received.

Type


Command Line

Modify: MOD DORPCP

Query: LST DORRMP

Value Range

1–99 in 1%

Default Value

1, that is, 1%

Setting Tradeoff

During the setting of the reverse target PER, ensure a tradeoff between the reverse transmit power and the system load. If this parameter is set to a low value, the transmit power of the AT is high and the reverse load of the system increases.

Remarks

The reverse PER affects the sector throughput.

5.2.2 Minimum PCT (MINPCT)

Description

This parameter indicates the minimum power control threshold (PCT) value allowed for outer loop power control.

Type


Command Line

Modify: MOD DORPCP

Query: LST DORRMP

Value Range

-28672 to -12416 in 1/1024 dB

Default Value

- 22528, that is, -22 dB

Setting Tradeoff

The same target PER is converged. The PCT value varies with link status, such as the change in soft handoff branches. Thus, the PCT is changed dynamically, which is defined by MINPCT and MAXPCT.

Remarks


5.2.3 Maximum PCT (MAXPCT)

Description

This parameter indicates the maximum PCT value allowed for outer loop power control.

Type


Command Line

Modify: MOD DORPCP

Query: LST DORRMP

Value Range

- 28672 to -12416 in 1/1024 dB

Default Value

- 19456, that is, -19 dB

Setting Tradeoff

This parameter and MINPCT define the dynamic change range of PCT.

Remarks


5.2.4 Initial PCT (INITPCT)

Description

The parameter indicates the initial PCT value for outer loop power control. During power control, the BSC adjusts the PCT value between MINPCT and MAXPCT from time to time.

Type


Command Line

Modify: MOD DORPCP

Query: LST DORRMP

Value Range

- 28672 to -12416 in 1/1024 dB

Default Value

- 21504, that is, -21 dB

Setting Tradeoff

If this parameter is set to a large value, the number of reverse error packets is reduced in the initial call setup phase and the reverse PER is thus guaranteed. If this parameter is set to a small value, the PER is high in the initial call setup phase.

Remarks


6 Admission Control and Load Control Parameters

6.1 Hard Assignment Parameters

6.1.1 Carrier Assign Allowed Indicator of EV-DO (ASSALWDO)

Description

This parameter specifies whether hard assignment is allowed in the cell.

Type

It is a parameter at sector level.

Command Line

Modify: MOD/ADD CELL

Query: LST CELL

Value Range

YES (ALLOWED), NO (PROHIBITED)

Default Value

NO (PROHIBITED)

Setting Tradeoff

None.

Remarks

This parameter indicates the hard assignment switch. When this switch is disabled, hard assignment algorithms are invalid.

6.1.2 EV-DO Multi Band Assignment Switch (DOMULTIBANDASSIGNSW)

Description

This parameter specifies whether the EV-DO multi-band hard assignment is allowed. If this parameter is set to ON, a call can be assigned to a suitable channel on any band in the local sector. If this parameter is set to OFF, a call can be assigned to a suitable channel only on the access channel. This parameter applies to EV-DO Rev.A terminals only.

Type

It is an internal general parameter at sector level.

Command Line

Modification: MOD/ADD CELL

Query: LST CELL

Value Range

ON (ON), OFF (OFF)

Default Value

OFF (OFF)

Setting Tradeoff

None.

Remarks

Multi-band hard assignment does not apply to EV-DO Rev.0 terminals because the configuration protocol shows only the bands supported by EV-DO Rev.A terminals. Before enabling multi-band hard assignment of an EV-DO Rev.0 terminal, check whether it supports other bands. Disable multi-band hard assignment if the terminal does not support other bands.

6.1.3 EV-DO Reverse RSSI Carrier Assignment Switch (DOAREVRSSICARRASSNSW)

Description

This parameter specifies whether the RSSI-based reverse hard assignment algorithm function can be enabled in the cell. If the function is enabled, a call is not assigned to a frequency with a high RSSI value.

Type


Command Line


Query: LST CELL

Value Range

OFF (OFF),

ON1 (ON (BASED ON RSSI ABSOLUTE VALUE)),

ON2 (ON (BASED ON RSSI RELATIVE VALUE DIFFENCE AND EQUIVALENT USER NUMBER DIFFERNCE))

Default Value

OFF (OFF)

Setting Tradeoff

None.

Remarks

None.

6.1.4 EV-DO RevA Prevision Priority Assign Carrier Switch (DOAPRVPRIASSSW)

Description

This parameter specifies whether EV-DO RevA prevision priority hard assignment is allowed in the cell.

Type


Command Line


Query: LST CELL

Value Range

ON (ON), OFF (OFF)

Default Value

OFF (OFF)

Setting Tradeoff

None.

Remarks

None.

6.1.5 Access Priority Assign Carrier Switch (DOAACCPRIASSSW)

Description

This parameter indicates the access carrier priority switch of hard assignment.

Type


Command Line

Modify: MOD DOACAP

Query: LST DORRMP

Value Range

ON (ON), OFF (OFF)

Default Value

OFF (OFF)

Setting Tradeoff

None.

Remarks

None.

6.1.6 EV-DO Assign Carrier Equivalent User Number Threshold (ASSTHRESH)

Description

This parameter specifies the absolute threshold of the equivalent subscriber number used in hard assignment.

Type


Command Line

Modify: MOD DOACAP

Query: LST DORRMP

Value Range

1–65535

Default Value

61

Setting Tradeoff

When this parameter is set to an exclusively high value, the possibility of assigning to the access frequency increases. But this affects the load balancing of carriers. When this

parameter is set to an excessively low value, the possibility of assigning to the access frequency decreases. But this facilitates the load balancing of carriers.

Remarks

None.

6.1.7 EV-DO Assign Carrier Equivalent User Number Relative Threshold (ASSRELATHRESH)

Description

This parameter specifies the relative threshold of the equivalent subscriber number used in hard assignment.

Type


Command Line

Modify: MOD DOACAP

Query: LST DORRMP

Value Range

1–65535

Default Value

4

Setting Tradeoff

When this parameter is set to an exclusively high value, the possibility of assigning to the access frequency increases. But this affects the load balancing of carriers. When this parameter is set to an excessively low value, the possibility of assigning to the access frequency decreases. But this facilitates the load balancing of carriers.

Remarks

None.

6.1.8 EV-DO RevA Carrier Prevision Priority (CARRPRVPRI)

Description

This parameter specifies the prevision priority of DO RevA carriers.

Type


Command Line

Modify: MOD DOACAP

Query: LST DORRMP

Value Range

DOA(EV-DO REVA PRIORITY), DO0(EV-DO REL0 PRIORITY)

Default Value

DOA(EV-DO REVA PRIORITY)

Setting Tradeoff

None.

Remarks

None.

6.1.9 Hard Assign Equivalent Subscribers (ASSIGNEQUUSERS)

Description

This parameter specifies the equivalent subscriber number for each QoS level used in hard assignment.

Type


Command Line

Modify: MOD DOQOS

Query: LST DOQOS

Value Range

1–32

Default Value

GOLD(GOLD SUBSCRIBER) 4

SILVER(SILVER SUBSCRIBER) 2

BRONZE(BRONZE SUBSCRIBER) 1

LINE1(PRIVATE LINE SUBSCRIBER 1) 4



Setting Tradeoff

When this parameter is set to a too large or too small value, the determination of carrier load is affected.

Remarks

The value of this parameter should not be modified.

6.1.10 Pilot Priority Level (PLTPL)

Description

This parameter is used to Modify: the carrier priority level. The carrier priority level enables the carrier with the highest priority and the lowest load to be chosen when multiple carriers meet the priority condition.

Type


Command Line

Modify: MOD CDMACH

Query: LST CDMACH

Value Range

1–6

Default Value

1

Setting Tradeoff

When this parameter is set to an exclusively high value, the possibility of being assigned to the frequency increases in the priority hard assignment. When it is set to an excessively low value, the possibility of being assigned to the frequency decreases.

Remarks

Except for special configuration policies, generally, the carrier priority function is not recommended in a multi-carrier networking scenario but the same priority (1 by default) is recommended for all the carriers.

6.2 Admission Control Parameters

6.2.1 Access Control High PRI Invade Switch (ACCCTRLINVDSW)

Description

This parameter determines whether to allow the flow with high priority to preempt the resources of the flow with low priority when access control is enabled.

Type


Command Line

Modify: MOD DOAFLCP

Query: LST DORRMP

Value Range

ON (ON), OFF (OFF)

Default Value

ON (ON)

Setting Tradeoff

None.

Remarks

None.

6.2.2 Max. VIP Number (MAXVIPNUM)

Description

This parameter indicates the maximum number of private line subscribers on a carrier.

Type


Command Line

Modify: MOD DOAFLCP

Query: LST DORRMP

Value Range

1–114

Default Value

10

Setting Tradeoff

If the parameter is set to an excessively high value, the throughput of other non-private line subscribers is seriously affected, and the system performance is also affected.

Remarks

None.

6.2.3 Max. Bandwidth of EF Flow (MAXEFFLOWBW)

Description

This parameter defines the maximum bandwidth that EF flows can seize. It is used for access control of EF flows.

Type


Command Line

Modify: MOD DOAFLCP

Query: LST DORRMP

Value Range

0–3072000 in bps

Default Value

2150400

Setting Tradeoff

If this parameter is set to a value too small, fewer EF flows are admitted and some available bandwidth of the system is wasted if there is available bandwidth. If this parameter is set to an exclusively high value, the access control function is weakened, thus affecting the QoS satisfaction of subscribers.

Remarks

This parameter is used for access control of EF flows.

6.2.4 Max. Bandwidth of EF And AF Flow (MAXEFAFFLOWBW)

Description

This parameter specifies the total bandwidth that EF flows and AF flows can seize. It is used for access control of AF flows.

Type


Command Line

Modify: MOD DOAFLCP

Query: LST DORRMP

Value Range

0–3072000 in bps

Default Value

2150400

Setting Tradeoff

If this parameter is set to a value too small, the QoS satisfaction of subscribers is affected. If the system has available bandwidth, it is a waste of the bandwidth. If this parameter is set to an exclusively high value, the access control function is weakened, thus affecting the QoS satisfaction of subscribers.

Remarks

This parameter is used for access control of AF flows.

6.2.5 Max. Slots Occupancy Ratio of EF Flow (MAXEFSLTOCCU)

Description

This parameter specifies the maximum timeslot occupancy ratio of EF flows during access control.

Type


Command Line

Modify: MOD DOAFLCP

Query: LST DORRMP

Value Range

0–10000 in 0.01%

Default Value

7000, that is, 70%

Setting Tradeoff

If this parameter is set to a value too small, fewer EF flows are admitted and the system resources and system throughput are affected. If this parameter is set to an exclusively high value, the access control function is weakened, thus affecting the QoS satisfaction of subscribers.

Remarks

This parameter is used for access control of EF flows.

6.2.6 Max. Slots Occupancy Ratio of EF And AF Flow (MAXEFAFSLTOCCU)

Description

This parameter specifies the maximum timeslot occupancy ratio of EF flows and AF flows during access control.

Type


Command Line

Modify: MOD DOAFLCP

Query: LST DORRMP

Value Range

0–10000 in 0.01%

Default Value

10000, that is, 100%

Setting Tradeoff

If this parameter is set to a value too small, fewer AF flows are admitted and the system resources and system throughput are affected. If this parameter is set to an exclusively high value, the access control function is weakened, thus affecting the QoS satisfaction of subscribers.

Remarks

This parameter is used for access control of AF flows.

6.2.7 Reverse Activation Bit Threshold (RABTHR)

Description

This parameter specifies the ROT threshold of the reverse activation (RA) bit when the internal mode of the DO channel board is used (that is, the chip of the channel board obtains

ROT and decides the value of the RA bit). Each timeslot of the channel board obtains ROT and compares ROT with the threshold. If ROT is greater than this parameter value, the RA bit of this subframe is set to 1, indicating that the sector is busy. If ROT is smaller than this parameter value, the RA bit of this subframe is set to 0, indicating that the sector is idle.

Type


Command Line

Modify: MOD DOARLCP

Query: LST DORRMP

Value Range

12-40 in 0.25 dB

Default Value

15

Setting Tradeoff

5.75 dB is recommended by Qualcomm for this parameter. The default value cannot be used universally. Set this parameter according to the network load and the radio environment.

Remarks

None.

6.2.8 Maximum Number of Subscribers of EV-DO Rel0 Carriers (MAX_CHAN_NUM)

Description

This parameter indicates the maximum number of branches that can be set up on an EV-DO Rel0 carrier.

Type


Command Line

Modify: MOD DOSP

Query: LST DORRMP

Value Range

0–59

Default Value

31

Setting Tradeoff

If this parameter is set to an exclusively high value, the number of subscribers who access the system increases, but the transmission performance of a single subscriber degrades.

Remarks

None.

6.2.9 Maximum Number of Subscribers of EV-DO RevA Carriers (DOAMAXCHANNUM)

Description

This parameter indicates the maximum number of branches that can be set up on an EV-DO RevA carrier.

Type


Command Line

Modify: MOD DOSP

Query: LST DORRMP

Value Range

0–114

Default Value

61

Setting Tradeoff

If this parameter is set to an exclusively high value, the number of subscribers who access the system increases, but the transmission performance of a single subscriber degrades.

Remarks

None.

6.3 Load Control Parameters

6.3.1 Reverse Activation Bit Decision Algorithm (RADESNALG)

Description

This parameter specifies an algorithm used for load-based RAB decision during reverse load control.

Type


Command Line

Modify: MOD DORLCP

Query: LST DORRMP

Value Range

The drop-down menu of the maintenance console provides eight algorithms

ALG0 (ROT) When RoT is overloaded, this algorithm is used to decide overload.

ALG1 (L) When Load is overloaded, this algorithm is used to decide overload.

ALG2 (ROT and L) When both RoT and Load are overloaded, this algorithm is used to decide overload.

ALG3 (ROT or L) When one of RoT and Load is overloaded, this algorithm is used to decide overload.

ALG4 (ROT and RSSI) When both RoT and RSSI are overloaded, this algorithm is used to decide overload.

ALG5 (L and RSSI) When both Load and RSSI are overloaded, this algorithm is used to decide overload.

ALG6 (ROT and L and RSSI) When RoT, Load and RSSI are overloaded, this algorithm is used to decide overload.

ALG7 (ROT or L and RSSI) When one of RoT and Load is overloaded as well as RSSI, this algorithm is used to decide overload.

Default Value

ALG0 (decide overload according to RoT only)

Setting Tradeoff

Changing the value of this parameter is not recommended.

Remarks

Load is calculated by the CSM chip on the EVDO channel board of the BTS according to the number of reverse active subscribers, the reverse rate, and the strength of received signals.

6.3.2 Reverse Link Silence Period Duration (ReverseLinkSilenceDuration)

Description

This parameter specifies the duration of the silence period of reverse links.

Type


Command Line

Modify: MOD DOSPM

Query: LST DOSPM

Value Range

0–3 in frames

Default Value

3

Setting Tradeoff

If this parameter is set to a value too small, the AN cannot precisely measure thermal noise and thus the accuracy of ROT is affected. If this parameter is set to a value too large, the reverse throughput and access delay are affected.

Remarks

When the background noise algorithm uses the silence period mode, the silence period parameter settings of the AT must be consistent with those of the BTS.

6.3.3 Reverse Link Silence Period (ReverseLinkSilencePeriod)

Description

This parameter specifies the silence period of reverse links.

Type


Command Line

Modify: MOD DOSPM

Query: LST DOSPM

Value Range

0–3

Default Value

2

Setting Tradeoff

If this parameter is set to a value too small, the reverse throughput and access delay are affected. If this parameter is set to a value too large, the AN slowly updates the background noise.

Remarks

None.

6.3.4 Access Channel Load Control Algorithmic Switch (ACCCHLDCTRLSW)

Description

This parameter enables or disables the load control algorithm of access channels. By using this parameter, you can use different load control algorithms to control the load of access channels.

Type


Command Line

Modify: MOD DOARLCP

Query: LST DORRMP

Value Range

OFF (OFF), OCCU (BY OCCUPANCY RATIO), OCCUCOLLS

(BY OCCUPANCY RATIO AND COLLISION RATIO)

Default Value

OFF (OFF)

Setting Tradeoff

None.

Remarks

The collision rate measured can be inaccurate. In this case, the load of access channels can be controlled by using the occupancy ratio only and the maximum value of APersistence must be strictly restricted.

7 DO Service Parameters

7.1 Rate Limit Parameters

7.1.1 Forward Limited Rate of Private Line Subscribers (FWDLMTRATE)

Description

This parameter specifies the maximum forward physical layer rate of DO Rev.A private line subscribers.

Type

It is a parameter at system level.

Command Line

Modify: MOD DOAQOS

Query: LST DOAQOS

Value Range

RATE9K6 (9.6 kbps), RATE19K2 (19.2 kbps), RATE38K4 (38.4 kbps), RATE76K88 (76.8 kbps), RATE153K6 (153.6 kbps), RATE307K2 (307.2 kbps), RATE614K4 (614.4 kbps)

Default Value

Line1 307.2 kbps

Line2 153.6 kbps

Line3 76.8 kbps

Setting Tradeoff

This parameter limits the forward rate of all private line subscribers. The parameter setting is related to the operation policy.

Remarks

None.

7.1.2 Reverse Limited Rate of Private Line Subscribers (REVLMTRATE)

Description

This parameter specifies the maximum reverse physical layer rate of DO Rev.A private line subscribers.

Type


Command Line

Modify: MOD DOAQOS

Query: LST DOAQOS

Value Range

RATE9K6 (9.6 kbps), RATE19K2 (19.2 kbps), RATE38K4 (38.4 kbps), RATE76K88 (76.8 kbps), RATE153K6 (153.6 kbps), RATE307K2 (307.2 kbps), RATE614K4 (614.4 kbps)

Default Value

Line1 153.6 kbps

Line2 76.8 kbps

Line3 38.4 kbps

Setting Tradeoff

This parameter limits the reverse rate of all private line subscribers. The parameter setting is related to the operation policy.

Remarks

None.

7.1.3 Forward Limited Rate (GRADEFWDLMTRATE)

Description

This parameter specifies maximum forward physical layer rates for EV-DO Rel.0 users of different classes.

Type


Command Line

Modify: MOD DOQOS

Query: LST DOQOS

Value Range

FRATE488 (48.8 kbps), FRATE732 (73.2 kbps), FRATE1464 (146.4 kbps), FRATE2928 (292.8 kbps), FRATE5856 (585.6 kbps), FRATE8784 (878.4 kbps), FRATE11712 (1171.2 kbps), FRATE17568 (1756.8 kbps), FRATE23424 (2342.4 kbps)

Default Value

Gold: FRATE23424 (no limit)

Silver: FRATE11712 (1171.2kbps)

Bronze: FRATE5856 (585.6kbps)

Line1: 307.2kbps

Line2: 153.6kbps

Line3: 76.8kbps

Setting Tradeoff

This parameter relates to the operation policy.

Remarks

None.

7.1.4 Reverse Limited Rate (REVLMTRATE)

Description

This parameter specifies maximum reverse physical layer rates for EV-DO Rel.0 users of different classes.

Type


Command Line

Modify: MOD DOQOS

Query: LST DOQOS

Value Range

RATE0 (0 kbps), RATE1 (9.6 kbps), RATE2 (19.2 kbps), RATE3 (38.4 kbps), RATE4 (76.8 kbps), RATE5 (153.6 kbps)

Default Value

Gold: RATE5 (153.6kbps)

Silver: RATE4 (76.8kbps)

Bronze: RATE3 (38.4kbps)

Line1: 153.6kbps

Line2: 76.8kbps

Line3: 38.4kbps

Setting Tradeoff

This parameter relates to the operation policy.

Remarks

None.

7.2 RLP Parameters

7.2.1 RLP Data Retransmission Wait Timer Length (ABORTTLEN)

Description

This parameter indicates the maximum waiting time for the reverse retransmitted data. When the reverse data is lost, the RLP sends an NAK message and starts this timer. If the reverse retransmitted data is not received upon expiry of this timer, the RLP transmits the data in the buffer to the upper layer.

Type


Command Line



Value Range

1–1000 in milliseconds

Default Value

500

Setting Tradeoff

For delay-sensitive services, this parameter must be set to a small value to meet the delay requirements of the upper-layer applications but the times that RLP packets are aborted will increase. For delay-insensitive services, this parameter must be set to a large value to guarantee the reliability of connections.

Remarks

This parameter is a constant defined in the protocol. Therefore, do not change it unless really necessary.

7.2.2 RLP Flush Timer Length (FLUSHTLEN)

Description

This parameter defines the maximum time interval at which the RLP sends forward byte flows. If no forward RLP data is sent upon expiry of this timer, the RLP sends a byte flow that contains at least the bytes last sent.

Type


Command Line



Value Range


Default Value

300

Setting Tradeoff

For delay-sensitive services, this parameter must be set to a small value to meet the delay requirements of the upper-layer applications. For delay-insensitive services, this parameter must be set to a large value to guarantee the reliability of connections.

Remarks

This parameter is a constant defined in the protocol. Therefore, do not change it unless really necessary.

7.2.3 Inactive Timer Length (INACTIVETLEN)

Description

This parameter defines the maximum duration of a connection when no data is sent in the forward and reverse directions. If no data is sent in the forward and reverse directions upon expiry of this timer, the current connection is released.

Type


Command Line



Value Range

10–255 in seconds

Default Value

30

Setting Tradeoff

If this parameter is set to a value too small, connection setup and release are frequent. If this parameter is set to a value too large, resources are wasted.

Remarks

None.

7.3 Reverse Frame Processing Parameters

7.3.1 Reverse Frame Combination Timer Length (RFCOMBINET)

Description

This parameter indicates the maximum time difference allowed between the arrival of the reverse traffic frame of the last branch and that of the first branch during the combination of reverse branches.

Type


Command Line



Value Range


Default Value

10

Setting Tradeoff

If this parameter is set too low, the BSC can receive the reverse traffic frames of only some branches instead of all the branches and the frame combination gain is reduced. If this parameter is set too large, the processing delay increases and the delay requirements of delay-sensitive services cannot be met.

Remarks

None.

7.3.2 Reverse Frame Transmission Path Jitter (RPDITHER)

Description

This parameter indicates the maximum time interval between two frames of a subscriber allowed by the BSC.

Type


Command Line



Value Range

40–208 in 0.125 milliseconds

Default Value

81

Setting Tradeoff

If this parameter is set too low, large jitter is not supported during the combination of reverse frames and then combination can fail. If this parameter is set too large, the processing delay increases and the delay requirements of delay-sensitive services cannot be met.

Remarks

None.

7.3.3 Maximum Number of IDLE Frames Sent (MAXIDLEFRM)

Description

This parameter indicates the maximum number of IDLE frames that can be sent during connection setup. If BSC does not receive an IDLE frame from the BTS until the number of idle frames is exceeded, the connection setup fails.

Type


Command Line



Value Range

1–30

Default Value

10

Setting Tradeoff

If this parameter is set too low, the success rate of IDLE frame exchange is low. If this parameter is set too large, the success rate of IDLE frame exchange is improved but the duration of IDLE frame exchange is prolonged.

Remarks

None.

7.3.4 IDLE Frame Waiting Timer Length (IDLEFRAMET)

Description

This parameter indicates the time after which the BSC expects to receive an IDLE frame returned by the BTS after the BSC sends an IDLE frame to the BTS.

Type


Command Line



Value Range


Default Value

20

Setting Tradeoff

If this parameter is set too low, the success rate of IDLE frame exchange and the connection setup success rate are low. If this parameter is set too large, the success rate of IDLE frame exchange is improved to some extent but the duration of IDLE frame exchange is prolonged and the connection setup time is longer.

Remarks

None.

7.3.5 Reverse Frame Waiting Timer Length (IRFRECEIVET)

Description

This parameter specifies the time to wait before the BTS captures reverse channel during the call setup.

Type


Command Line



Value Range


Default Value

4000

Setting Tradeoff

If this parameter is set too low, reverse capture may fail and thus the connection setup may fail. If this parameter is set too large, the processing delay increases.

Remarks

None.

7.3.6 Maximum Number of Abis Handshake Failures (HANDFAILCNT)

Description

This parameter defines the maximum number of failures of the handshakes between BSC and BTS at the Abis interface. When this number is exceeded, the connection is released.

Type


Command Line



Value Range

1–40

Default Value

20

Setting Tradeoff

If this parameter is set too low, connections can be abnormally released and the Abis link will be incorrectly considered as being unavailable. If this parameter is set too large, fewer connections will be abnormally released and the Abis link state can be accurately indicated.

Remarks

The BSC periodically checks whether any traffic frame or IDLE frame is sent in the forward direction. If no data is sent in the detection period, the BSC sends an IDLE frame to the BTS to perform a handshake at the Abis interface.

CDMA Performance Parameters (EVDO) V3.0

Documents

Transcript of CDMA Performance Parameters (EVDO) V3.0