02 cdma performance parameters (ev-do) v3.3 for customers

CDMA Performance Parameters (EV-DO) V3.3 for Customers

Issue 01

Date 2009-11-10

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2009. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd. Trademarks and Permissions

and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd. All other trademarks and trade names mentioned in this document are the property of their respective holders. Notice The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided “AS IS” without warranties, guarantees or representations of any kind, either express or implied. The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute the warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.

Address: Huawei Industrial Base Bantian, Longgang Shenzhen 518129 People's Republic of China

Website: http://www.huawei.com

Email: [email protected]

http://www.huawei.com/

mailto:[email protected]

Revision Record Date Release Description Author

2007-01-01 1.0 Completed the first draft. Design team of the CDMA & WiMAX Network Performance Research Department

2007-06-11 1.1 Modified the document according to comments of network planning personnel.

Design team of the CDMA & WiMAX Network Performance Research Department

2008-02-20 1.2 Added the configuration of the HCCT. Design team of the CDMA & WiMAX Network Performance Research Department

2008-05-20 2.0 On the basis of V1.2, added parameters and modified the structure of the document to match V3R1C02.


2008-08-10 3.0 On the basis of V2.0, added parameters and modified the structure of the document to match V3R6C02.


2009-03-27 3.2 On the basis of V3.0, added parameters and modified the structure of the document to match V3R6C03B015.


2009-10-10 3.3 On the basis of V3.2, added the new features to match V300R006C03B015 and reviewed the entire document.

CDMA & WiMAX & TD-SCDMA Network Performance Research Department

CDMA Performance Parameters (EV-DO) V3.3 for Customers Contents

Issue 06 (2009-11-05) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd

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Contents

1 Preface .............................................................................................................................................1 1.1 Introduction to This Document ........................................................................................................................ 1

1.1.1 Scope....................................................................................................................................................... 1 1.1.2 Intended Audience .................................................................................................................................. 1 1.1.3 Organization............................................................................................................................................ 1 1.1.4 Change History ....................................................................................................................................... 2 1.1.5 References............................................................................................................................................... 3

1.2 Conventions and Descriptions.......................................................................................................................... 4 1.3 Acronyms and Abbreviations ........................................................................................................................... 4

2 System Parameters ........................................................................................................................6 2.1 QuickConfig Message ...................................................................................................................................... 6

2.1.1 Color Code (COLORCODE) .................................................................................................................. 6 2.1.2 SECTORID24 (SECTORID24) .............................................................................................................. 8 2.1.3 Redirect (DOREDIRECT) ...................................................................................................................... 8 2.1.4 SECTORID104(SECTORID104) ........................................................................................................... 9

2.2 SectorParameters Message............................................................................................................................. 10 2.2.1 Subnet Mask (SUBNETMASK)........................................................................................................... 10 2.2.2 Local Time Offset (DOLTMOFF)......................................................................................................... 11 2.2.3 Route Update Radius (ROUTEUP) ...................................................................................................... 12 2.2.4 Sector ChannelNo. Included (SCTARFCNLSTINCL) ......................................................................... 13 2.2.5 ChannelNo. List (ARFCNLST) ............................................................................................................ 14 2.2.6 Sector Extended ChannelNo. Included (SCTEXTARFCNLSTINCL) ................................................. 15 2.2.7 Extended ChannelNo. List (EXTARFCNLST)..................................................................................... 15 2.2.8 Access Hashing Channel Mask List Included (ACCHSHCHNMASKLSTINCL) ............................... 16 2.2.9 Access Hashing Channel Mask List (ACCHSHCHNMASKLST) ...................................................... 17 2.2.10 Route Update Trigger Code Included (ROUTEUPDATETRGCODIND) .......................................... 18 2.2.11 Route Update Trigger Code (ROUTEUPDATETRGCOD) ................................................................ 18 2.2.12 Route Update Trigger Max Age (ROUTEUPDATETRGMAXAGE)................................................. 19 2.2.13 Prior Session GAUP (PRSESSIONGAUP) ........................................................................................ 20

2.3 Configuration of the Session Protocol............................................................................................................ 21 2.3.1 Session Close Timer (TSMPCLOSE) ................................................................................................... 21

2.4 Other System Parameters ............................................................................................................................... 22



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2.4.1 EV-DO Carriers Protocol Version (EVDOPROVER)........................................................................... 22 2.4.2 Periodic Authorization Switch (REAUTHSW)..................................................................................... 23

3 Channel Parameters....................................................................................................................24 3.1 Forward Channel Parameters ......................................................................................................................... 24

3.1.1 CCH Rate (CCHRATE) ........................................................................................................................ 24 3.1.2 CCH Capsule Offset (CAPSULEOFFSET) .......................................................................................... 25 3.1.3 DRC Lock Period (DRCLockPeriod) ................................................................................................... 26 3.1.4 Default Protocol DRC Lock Length (DRCLockLength) ...................................................................... 28 3.1.5 Enhanced Protocol DRC Lock Length (ENHDRCLOCKLENGTH) ................................................... 29 3.1.6 Asynchronous Message Resending Switch (ASYNCRSNDSWT)....................................................... 30 3.1.7 Layer 2 Acknowledgement Resending Times (L2ACKRSNDNM)...................................................... 31 3.1.8 Asynchronous Message Lifetime Switch (ASYNCLTSWT) ................................................................ 31 3.1.9 Asynchronous Message Transmission Rate(ASYNCSNDRT) ............................................................ 32 3.1.10 Asynchronous Message Lifetime Unit (ASYNCLTUNT) .................................................................. 33 3.1.11 Layer 2 Acknowledgement Lifetime (L2ACKLT) .............................................................................. 33 3.1.12 Control Channel IIR Filter Time Constant (DRCTMCNST) .............................................................. 34 3.1.13 Control Channel IIR Filter Lock Threshold (DRCLCKTHD) ............................................................ 34 3.1.14 Control Channel IIR Filter Unlock Threshold (DRCUNLCKTHD)................................................... 35 3.1.15 Control Channel Idle Timeslot Gain (IDLSLTGN)............................................................................. 36 3.1.16 Forward Traffic Channel IIR Filter Time Constant (FLDRCTMCNST) ............................................ 36 3.1.17 Forward Traffic IIR Filter Locking Threshold (FLDRCLCKTHD).................................................... 37 3.1.18 Forward Traffic IIR Filter Unlock Threshold (FLDRCUNLCKTHD) ............................................... 38

3.2 Reverse Channel Parameters .......................................................................................................................... 38 3.2.1 Default Protocol DRC Gating (DRCGATING) .................................................................................... 39 3.2.2 Enhanced Protocol DRC Gating (ENHDRCGATING)......................................................................... 39 3.2.3 Enhanced Protocol DRC Offset 1/2/3/4/5/6/7/8/9/A/B/C/D/E (DRCOFFSET1/2/3/4/5/6/7/8/9/A/B/C/D/E) ................................................................................................ 40

4 Paging and Access Parameters..................................................................................................43 4.1 Paging Parameters .......................................................................................................................................... 43

4.1.1 Small Slot Cycle Allowed (SMALLSLTALLOW) ............................................................................... 43 4.1.2 Access Hashing Class Mask (ACCHASHCLASSMASK) ................................................................... 44 4.1.3 Slot Cycle 1 (SLTCYCLE1) ................................................................................................................. 45 4.1.4 Slot Cycle 2 (SLTCYCLE2) ................................................................................................................. 46 4.1.5 Slot Cycle 3 (SLTCYCLE3) ................................................................................................................. 47 4.1.6 Wake Count 1 (WAKECOUNT1) ......................................................................................................... 47 4.1.7 Wake Count 2 (WAKECOUNT2) ......................................................................................................... 48 4.1.8 Route Update Radius Addend (ROUTEUPDATERADIUSADD)........................................................ 49 4.1.9 Route Update Radius Multiplier (ROUTEUPDATERADIUSMULTIPLY) ......................................... 50 4.1.10 Route Update Radius Addend (ROUTEUPDATERADIUSADD)...................................................... 50 4.1.11 Route Update Radius Multiplier (ROUTEUPDATERADIUSMULTIPLY) ....................................... 51

4.2 Access Parameters .......................................................................................................................................... 52



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4.2.1 Access Cycle Duration (ACYCLEDURATION) .................................................................................. 52 4.2.2 Preamble Length (PRBLEN) ................................................................................................................ 53 4.2.3 Capsule Length Max (CAPSULELENMAX)....................................................................................... 55 4.2.4 Open Loop Adjust (OLOOPADJUST).................................................................................................. 56 4.2.5 Probe Initial Adjust (PRBINIADJUST)................................................................................................ 57 4.2.6 Probe Num Step (PRBNUMSTEP)....................................................................................................... 58 4.2.7 Power Step (PWRSTEP)....................................................................................................................... 59 4.2.8 APERSISTENCE0/1/2/3(PERSISTENCE0/1/2/3) ............................................................................... 60 4.2.9 Macro Diversity Access Switch (ACCMACRODIVSWITCH)............................................................ 61 4.2.10 Enhanced Access Parameters Included (ENHACCPARAIND).......................................................... 61 4.2.11 Preamble Length Slots (PREAMBLELENSLOT).............................................................................. 62 4.2.12 Probe TimeOut Adjust (PROBETIMEOUTADJUST)........................................................................ 63 4.2.13 Pilot Strength Nominal (PILOTSTRNOMINAL)............................................................................... 64 4.2.14 Pilot Strength Correction Max (PILOTSTRCORTMAX)................................................................... 65 4.2.15 Pilot Strength Correction Min (PILOTSTRCORTMIN)..................................................................... 66 4.2.16 Default Protocol Probe Sequence Max (PRBSEQMAX) ................................................................... 66 4.2.17 Default Protocol Probe Backoff (PRBBKOFF) .................................................................................. 67 4.2.18 Default Protocol Probe Sequence Backoff (PRBSEQBKOFF) .......................................................... 68 4.2.19 Default Protocol Access Channel Data Offset Nom (DATAOFFSETNOM) ...................................... 69 4.2.20 Enhanced Protocol Probe Sequence Max (ENHPRBSEQMAX) ....................................................... 69 4.2.21 Enhanced Protocol Probe Backoff (ENHPRBBKOFF) ...................................................................... 70 4.2.22 Enhanced Protocol Probe Sequence Backoff (ENHPRBSEQBKOFF)............................................... 71 4.2.23 Maximum Cell Radius (MAXCELLR)............................................................................................... 72

5 Handoff Parameters....................................................................................................................73 5.1 Intra-Frequency Pilot Set Management.......................................................................................................... 73

5.1.1 Max. Active Set Branches (HOMAXBRANCHNUM) ........................................................................ 73 5.1.2 Different Active Set SHO Allowed (DIFFASSWITCH)....................................................................... 74 5.1.3 Same Channel Parameters Pilot Add (PILOTADD) ............................................................................. 75 5.1.4 Same Channel Parameters Pilot Compare (PILOTCMP) ..................................................................... 76 5.1.5 Same Channel Parameters Pilot Drop (PILOTDROP).......................................................................... 76 5.1.6 Same Channel Parameters Pilot Drop Timer (PILOTDROPTIMER)................................................... 77 5.1.7 Same Channel Parameters Dynamic Thresholds (DYNAMICTRESHINC)......................................... 79 5.1.8 Same Channel Parameters Soft Slope (SOFTSLOPE).......................................................................... 79 5.1.9 Same Channel Parameters Add Intercept (ADDINTERCEPT) ............................................................ 80 5.1.10 Same Channel Parameters Drop Intercept (DROPINTERCEPT)....................................................... 81 5.1.11 Same Channel Parameters Neighbor Max Age (NBRMAXAGE) ...................................................... 82 5.1.12 Acquisition Search Window Size (ACQUISITIONWSZ) .................................................................. 84 5.1.13 Data Search Window Size (DATAWSZ)............................................................................................. 85

5.2 Inter-Frequency Pilot Set Management.......................................................................................................... 85 5.2.1 Different Channel Parameters Pilot Add (DIFFCHPILOTADD).......................................................... 86 5.2.2 Different Channel Parameters Pilot Compare (DIFFCHPILOTCMP).................................................. 86



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5.2.3 Different Channel Parameters Pilot Drop (DIFFCHPILOTDROP)...................................................... 87 5.2.4 Different Channel Parameters Pilot Drop Timer (DIFFCHPILOTDROPTIMER) ............................... 88 5.2.5 Different Channel Parameters Dynamic Thresholds (DIFFCHDYNAMICTRESHINC)..................... 89 5.2.6 Different Channel Parameters Soft Slope (DIFFCHSOFTSLOPE)...................................................... 90 5.2.7 Different Channel Parameters Add Intercept (DIFFCHADDINTERCEPT)......................................... 91 5.2.8 Different Channel Parameters Drop Intercept (DIFFCHDROPINTERCEPT) ..................................... 92 5.2.9 Different Channel Parameters Neighbor Max Age (DIFFCHNBRMAXAGE) .................................... 93

5.3 Pilot Searching Management ......................................................................................................................... 94 5.3.1 Pilot Increment (PILOTINCREMENT)................................................................................................ 94 5.3.2 Search Window Active (SRCHWINA)................................................................................................. 95 5.3.3 Search Window Neighbor (SRCHWINN) ............................................................................................ 97 5.3.4 Search Window Remaining (SRCHWINR) .......................................................................................... 98 5.3.5 Search Window Size Contain Flag (SRCHWININC)........................................................................... 99 5.3.6 Search Window Size (SRCHWIN) ....................................................................................................... 99 5.3.7 Search Window Offset Contain Flag (SRCHOFFSINC) .................................................................... 100 5.3.8 Search Window Offset (SRCHOFFS)................................................................................................. 101 5.3.9 Neighbor Search Window Size Included (NSRCHWININC)............................................................. 102 5.3.10 Neighbor Search Window Size (NSRCHWINSIZE) ........................................................................ 103 5.3.11 Neighbor Search Window Offset Included (NSRCHWINOFFSETINC).......................................... 104 5.3.12 Neighbor Search Window Offset (NSRCHWINOFFSET) ............................................................... 104

5.4 Virtual Soft Handoff..................................................................................................................................... 105 5.4.1 Default Protocol Soft Handoff Delay (SFTHODLY).......................................................................... 105 5.4.2 Default Protocol Softer Handoff Delay (SFTERHODLY).................................................................. 106 5.4.3 Enhanced Protocol Soft Handoff Delay (ENHSOFTHODELAY)...................................................... 107 5.4.4 Enhanced Protocol Softer Handoff Delay (ENHSOFTERHODELAY).............................................. 108 5.4.5 Virtual SHO Monitor Timer Length (SHOMONITORT).................................................................... 109

5.5 RTD Hard Handoff Parameters ................................................................................................................ 109 5.5.1 EV-DO RTD HHO Switch (RTDDOHHOSW) .................................................................................. 109 5.5.2 RTD HHO Central Area Max. RTD Threshold (CENTERTHRLD)................................................... 110 5.5.3 RTD HHO Border Area Max. RTD Threshold (BORDERTHRLD)................................................... 111 5.5.4 RTD HHO Border Area EC/IO Strength Absolute Threshold (ECIOTHRLD)................................... 112

5.6 OFS Hard Handoff Parameters..................................................................................................................... 112 5.6.1 EV-DO OFS HHO Switch (OFSDOHHOSW) ................................................................................... 112 5.6.2 OFS HHO Relative Threshold (RELTHRLD) .................................................................................... 113

5.7 Parameters Configured for the Intra-Frequency HHO ................................................................................. 114 5.7.1 EV-DO SF HHO Switch (SFDOHHOSW) ......................................................................................... 114 5.7.2 Relative Threshold of Intra-Frequency Hard Handoff (RELATHRESH) ........................................... 114 5.7.3 Outgoing Handoff Threshold of Intra-Frequency Hard Handoff (SRCABSTHRESH) ...................... 115 5.7.4 Handoff Threshold of the Target Carrier of the Intra-Frequency Hard Handoff (TRGABSTHRESH)..................................................................................................................................................................... 116 5.7.5 EV-DO Same-Frequency HHO Period Deliver RUR Switch (DOSFHHORURSW)......................... 117

5.8 AN Assisted Inter-AN HHO Parameters ...................................................................................................... 118



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5.8.1 AN-Assisted Inter-AN HO Switch (ANHOSWITCH)........................................................................ 118 5.9 Parameters Configured for Other Hard Handoff .......................................................................................... 118

5.9.1 Inter-AN HHO Division Switch (INTERANHHODIVSW)............................................................... 118 5.9.2 Neighbor AN Call Transfer Switch (DOSHOSW).............................................................................. 119 5.9.3 Call Park Delay Timer (No. 18 Timer of the RRM)............................................................................ 120 5.9.4 Intra-AN HHO Macro Division Switch (INTRAANHHOMACRODIVSW)..................................... 120 5.9.5 EV-DO HHO Max. Target Number (DOHHOMAXTARGNUM)...................................................... 121 5.9.6 EV-DO Data Call Supported HO Type (DOHOTP)............................................................................ 122 5.9.7 EV-DO Multi-BandClass HHO Switch (DOMULTIBANDHHOSW) ............................................... 123 5.9.8 EV-DO HHO Delay Switch (DOHHOALGSWDELAY) ................................................................... 123 5.9.9 Detect Pilot Pollution Switch (POLLUTESWITCH) ......................................................................... 124 5.9.10 Detect Missing Neighbor Cell Switch (DETECTMISSPILOTSWITCH) ........................................ 125

6 Reverse Power Control Parameters .......................................................................................126 6.1 EV-DO Rev. A Power Control Parameters ................................................................................................... 126

6.1.1 Reverse Target PER (DOAREVPER)................................................................................................. 126 6.1.2 Min. PCT (DOAMINPCT) ................................................................................................................. 127 6.1.3 Max. PCT (DOAMAXPCT) ............................................................................................................... 128 6.1.4 Initial PCT (DOAINITPCT) ............................................................................................................... 128 6.1.5 RPC Step (RPCStep)........................................................................................................................... 129 6.1.6 Modifying the Relation Between the Reverse PER and Down Step................................................... 130 6.1.7 Forward Traffic Channel Sending Down RPC Time (FLSNDRPCDWN) ......................................... 131

6.2 EV-DO Rel. 0 Power Control Parameters .................................................................................................... 132 6.2.1 Reverse Target PER (REVPER).......................................................................................................... 132 6.2.2 Min. PCT (DOAMINPCT) ................................................................................................................. 133 6.2.3 Max. PCT (DOAMAXPCT) ............................................................................................................... 133 6.2.4 Initial PCT (DOAINITPCT) ............................................................................................................... 134 6.2.5 RPC Step (RPCSTEP) ........................................................................................................................ 135

7 Multi-Flow Packet Application Parameters.........................................................................137 7.1 DPA Parameters............................................................................................................................................ 137

7.1.1 DPA Protocol RAN Handoff (RANHANDOFF) ................................................................................ 137 7.1.2 Length of Timer for RLP to Wait for Data Retransmission (ABORTTLEN)...................................... 138 7.1.3 RLP Flush Timer Length (FLUSHTLEN) .......................................................................................... 138 7.1.4 Deactivation Timer Length (INACTIVETLEN)................................................................................. 139

7.2 MFPA Parameters......................................................................................................................................... 140 7.2.1 MPA Protocol RAN Handoff (MPARANHANDOFF) ....................................................................... 140

7.3 EMFPA Parameters ...................................................................................................................................... 140 7.3.1 EMPAProtocolRANHandoff(EMPARANHANDOFF) ...................................................................... 140

8 Admission and Load Control Parameters ............................................................................141 8.1 Hard Assignment Parameters ....................................................................................................................... 141

8.1.1 Carrier Assign Allowed Indicator of EV-DO (ASSALWDO)............................................................. 142 8.1.2 EV-DO Multi Band Assignment Switch (DOMULTIBANDASSIGNSW) ........................................ 143



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8.1.3 EV-DO Reverse RSSI Carrier Assignment Switch (DOAREVRSSICARRASSNSW)...................... 144 8.1.4 EV-DO Rev. A Prevision Priority Assign Carrier Switch (DOAPRVPRIASSSW)............................. 145 8.1.5 Access Priority Assign Carrier Switch (DOAACCPRIASSSW) ........................................................ 145 8.1.6 EV-DO Assign Carrier Equivalent User Number Threshold (ASSTHRESH) .................................... 146 8.1.7 EV-DO Assign Carrier Equivalent User Number Relative Threshold (ASSRELATHRESH) ............ 147 8.1.8 EV-DO Rev. A Carrier Prevision Priority (CARRPRVPRI) ............................................................... 148 8.1.9 Hard Assign Equivalent Subscribers (ASSIGNEQUUSERS) ............................................................ 148 8.1.10 Pilot Priority Level (PLTPL)............................................................................................................. 149

8.2 EV-DO Service Parameters .......................................................................................................................... 150 8.2.1 EV-DO Rel. 0 Max. Carrier Users (MAXCHANNUM)..................................................................... 150 8.2.2 EV-DO Rev. A Max. Carrier Users (DOAMAXCHANNUM) ........................................................... 151 8.2.3 RAB Length (RABLENGTH) ............................................................................................................ 151 8.2.4 RAB Offset (RABOFFSET) ............................................................................................................... 153 8.2.5 RA Channel Gain (RACGAIN) .......................................................................................................... 153 8.2.6 Reverse Limited Rate.......................................................................................................................... 154

8.3 EV-DO Rev. A Forward Admission Control Parameters .............................................................................. 156 8.3.1 Access Control High PRI Invade Switch (ACCCTRLINVDSW) ...................................................... 156 8.3.2 Max. Vip Number (MAXVIPNUM)................................................................................................... 157 8.3.3 Max. Bandwidth of EF Flow (MAXEFFLOWBW) ........................................................................... 158 8.3.4 Max. Bandwidth of EF and AF Flow (MAXEFAFFLOWBW) .......................................................... 158 8.3.5 Max. Slots Occupancy Ratio of EF Flow (MAXEFSLTOCCU) ........................................................ 159 8.3.6 Max. Slots Occupancy Ratio of EF and AF Flow (MAXEFAFSLTOCCU) ....................................... 160 8.3.7 Abis BE Flow Traffic Bandwidth Threshold (ABISBETRFBWTHR) ............................................... 161 8.3.8 Admission Control Access Switch of BE Flow (ADMISSIONCTRLSWITCH)................................ 161 8.3.9 Load Control Switch of BE Flow (LOADCTRLSWITCH)................................................................ 162 8.3.10 Bass User Number Offset of BE Flow (USERBASSNUM) ............................................................. 163 8.3.11 Refuse Access Number Offset of BE Flow (REFUSEUSERNUMOFFSET) ................................... 164 8.3.12 Delete Access Number Offset beta of BE Flow (DELETEUSERNUMOFFSET)............................ 165 8.3.13 TH1 Speed Threshold of BE Flow (RATETH1) ............................................................................... 165 8.3.14 TH2 Speed Threshold of BE Flow (RATETH2) ............................................................................... 166 8.3.15 TH3 Speed Threshold of BE Flow (RATETH3) ............................................................................... 167 8.3.16 Invalid Time Threshold of Exception Protection of BE Flow (INVALIDTIMER)........................... 168 8.3.17 IIR Parameter alpha of BE Flow (IIRPARAMETER) ...................................................................... 168 8.3.18 Radio Environment Scale Threshold (ENVSCALETHD) ................................................................ 169

8.4 EV-DO Reverse Load Control Parameters ................................................................................................... 170 8.4.1 Reverse Active Bit Decision Algorithm (RADESNALG) .................................................................. 170 8.4.2 Reverse Link Silence Duration (RLSDURATION) ............................................................................ 171 8.4.3 Reverse Link Silence Period (RLSPERIOD)...................................................................................... 172 8.4.4 RAB Threshold (RABTHR) ............................................................................................................... 172

8.5 EV-DO Rev. A Reverse Admission and Load Control Parameters............................................................... 173 8.5.1 Reverse Admission Control Switch of BE Flow (RVSADDMITIONSW) ......................................... 173 8.5.2 Reverse Load Control Algorithm Switch of BE Flow (RVSLOADSW) ............................................ 174



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8.5.3 Algorithm Selection Switch of BE Flow (ALGORITHMSW) ........................................................... 175 8.5.4 BE Reverse Admission Threshold of BE Flow (RVSTHDBE)........................................................... 176 8.5.5 EF Reverse Admission Threshold of BE Flow (RVSTHDEF)............................................................ 176 8.5.6 No Elastic Resource EF Reverse Admission Threshold of BE Flow (RVSTHDNOELARES) .......... 177 8.5.7 BE Reverse Remove Threshold of BE Flow (RVSREMTHDBE)...................................................... 178 8.5.8 EF Reverse Remove Threshold of BE Flow (RVSREMTHDEF)....................................................... 179 8.5.9 Reverse Load Measure Period of BE Flow (RVSLOADMEASPRD) ................................................ 179 8.5.10 Reverse Access Control Switch (RVSACSCTRLSWT) ................................................................... 180

8.6 Access Channel Load Control Parameters ................................................................................................... 181 8.6.1 Access Channel Load Control Algorithmic Switch (ACCCHLDCTRLSW)...................................... 181 8.6.2 Access Channels Collision Threshold (ACHCOLLTHD)................................................................... 182

9 Forward Scheduling Parameters ............................................................................................183 9.1 Forward Scheduling Parameters................................................................................................................... 183

9.1.1 QoS Category (QOSCATEG) ............................................................................................................. 183 9.1.2 Metric State (METRICSTATE)........................................................................................................... 184 9.1.3 Delay BoundIn Slots (DELAYBOUNDINSLT) ................................................................................. 185 9.1.4 Delay Threshold 1 (DELAYTHRLD1)............................................................................................... 185 9.1.5 Delay Threshold 2 (DELAYTHRLD2)............................................................................................... 186 9.1.6 Delay Level 1 (DELAYMETRICSTATE1)......................................................................................... 187 9.1.7 Delay Level 2 (DELAYMETRICSTATE2)......................................................................................... 188 9.1.8 Acceleration Offset (ACCLRTOFFSET) ............................................................................................ 188 9.1.9 DRC Erasure Delay Threshold (DRCERASDELAYTHRLD) ........................................................... 189 9.1.10 Fwd Link Delayed ARQ Enabled (FWDDARQENABLED) ........................................................... 191 9.1.11 DS Bit Metric Value (DSBITMETRIC) ............................................................................................ 191 9.1.12 Um Schedule Mode of BE Flow (SCHEDULEMODE) ................................................................... 192 9.1.13 Threshold of Good Radio_Environment Threshold (DRCGOODTH) ............................................. 193 9.1.14 Threshold of Bad Radio_Environment Threshold (DRCBADTH) ................................................... 194 9.1.15 Gos Factor Of Gold Subscriber In Good Radio Environment District (DRCGOODGOLDGOSFACTOR)/Gos Factor Of Silver Subscriber In Good Radio Environment District (DRCGOODSILVERGOSFACTOR)/Gos Factor Of Bronze Subscriber In Good Radio Environment District (DRCGOODBRONZEGOSFACTOR)/Gos Factor Of Gold Subscriber In Middle Radio Environment District (DRCMIDGOLDGOSFACTOR)/Gos Factor Of Silver Subscriber In Middle Radio Environment District (DRCMIDSILVERGOSFACTOR)/Gos Factor Of Bronze Subscriber In Middle Radio Environment District (DRCMIDBRONZEGOSFACTOR)/Gos Factor Of Gold Subscriber In Bad Radio Environment District (DRCBADGOLDGOSFACTOR)/Gos Factor Of Silver Subscriber In Bad Radio Environment District (DRCBADSILVERGOSFACTOR)/Gos Factor Of Bronze Subscriber In Bad Radio Environment District (DRCBADBRONZEGOSFACTOR) .............................................................................................. 195 9.1.16 Threshold of Radio Environment District Where Throughput To Be Ensured (THDRC) ................ 196 9.1.17 Throughput of Gold Subscriber (GOLDTHROUGHPUT)............................................................... 197 9.1.18 Throughput of Silver Subscriber (SILVERTHROUGHPUT) ........................................................... 198 9.1.19 Throughput Of Bronze Subscriber (BRONZETHROUGHPUT)...................................................... 198 9.1.20 Forward Limited Rate (FWDLMTRATE) ........................................................................................ 199 9.1.21 Grade Subscriber Forward Limited Rate (GRADEFWDLMTRATE) .............................................. 200 9.1.22 Optimization Switch (SPCLUSROPTSWT)..................................................................................... 201



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10 Reverse Scheduling Parameters ...........................................................................................202 10.1 Parameters Configured for the Rate Limit for Reverse Leased Lines........................................................ 202

10.1.1 QoS Function Switch (QOSFUNSW)............................................................................................... 202 10.1.2 Reverse Limited Rate (REVLMTRATE).......................................................................................... 203

10.2 Parameters Configured for the Rate Limit for Reverse BE Flow Subscribers ........................................... 204 10.2.1 Reverse Limited Rate (REVLMTRATECLASS).............................................................................. 204 10.2.2 Reverse Limited Rate (REVLMTRATE).......................................................................................... 204

10.3 Parameters Configured for the Reverse Fixed Rate ................................................................................... 205 10.3.1 AT Fixed Reverse Date Rate Switch(RVSFIXRATESWT) .............................................................. 205

11 Other Parameters.....................................................................................................................207 11.1 Frame Exchange Parameters ...................................................................................................................... 207

11.1.1 Reverse Frame Combination Timer Length (RFCOMBINET)......................................................... 207 11.1.2 Reverse Frame Transmission Path Jitter (RPDITHER) .................................................................... 208 11.1.3 Max. Idle Frame Sending Times (MAXIDLEFRM)......................................................................... 208 11.1.4 Wait Idle Frame Timer Length (IDLEFRAMET) ............................................................................. 209 11.1.5 Wait Reverse Frame Timer Length(IRFRECEIVET)........................................................................ 210 11.1.6 Maximum Number of Abis Handshake Failures (HANDFAILCNT) ............................................... 211 11.1.7 Virtual SHO Monitor Timer Length (SHOMONITORT).................................................................. 211 11.1.8 DRC Supervison Timer (DRCSUPERVISIONTMR) ....................................................................... 212

11.2 Power Amplification Parameters ................................................................................................................ 213 11.2.1 Whether to Support Automatic Blocking of Carrier (AUTODWNCDMACH) ................................ 213 11.2.2 Subscriber Threshold of Automatic Blocking EV-DO Carrier (DOUSERCOUNTTHD)................. 214 11.2.3 Automatic Blocking Times Threshold of EV-DO Carrier (DOAUTODWNCOUNTTHD).............. 215 11.2.4 Subscriber Threshold of Automatic Recovering EV-DO Carrier (DOUNBLKUSERCOUNTTHD)215 11.2.5 Destination Frequency Sequence for Automatic Blocking of Carrier (TRGARFCN) ...................... 216 11.2.6 Start Time of Idle Duration for Automatic Blocking (STRTIME) .................................................... 217 11.2.7 End Time of Idle Duration for Automatic Blocking (STOPTIME)................................................... 217

11.3 Access Authentication Parameters.............................................................................................................. 218 11.3.1 Retransmission Times for an A12 Request (A12REQRST).............................................................. 218

11.4 MEID Support Information Parameters ..................................................................................................... 219 11.4.1 BSC Support MEID (BSCMEIDSUP).............................................................................................. 219 11.4.2 Inter BSC Handoff Support MEID (INTERHOMEIDSUP) ............................................................. 219 11.4.3 Neighbor AN Support MEID (NBRANMEIDSUP) ......................................................................... 220 11.4.4 PDSN Support MEID (PDSNMEIDSUP) ........................................................................................ 221 11.4.5 ANAAA Support MEID (ANAAAMEIDSUP)................................................................................. 221 11.4.6 Method of Calculating Public Long Code Mask (CALCUPLCMMETHOD) .................................. 222

12 White List Parameters ............................................................................................................224 12.1 Parameters Configured for the White List Function................................................................................... 224

12.1.1 Dedicated Carrier Flag (VIPCDMACH)........................................................................................... 224 12.1.2 VIP Group Indicator (VIPGROUP) .................................................................................................. 225 12.1.3 User Identifier Type (VIPGRPID) .................................................................................................... 226



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12.1.4 User Identifier Type (IDFTYPE) ...................................................................................................... 226 12.1.5 VIP User ESN/ MEID (ESNLST/MEIDLST) .................................................................................. 227

CDMA Performance Parameters (EV-DO) V3.3 for Customers Figures


xi

Figures

Figure 2-1 Mappings between SectorID128 and color code ................................................................................ 7

Figure 3-1 Transmission cycle of the control channel......................................................................................... 25

Figure 3-2 DRCLock bit transmission................................................................................................................. 28

Figure 4-1 Access probe structure ....................................................................................................................... 53

Figure 4-2 Relationships between the value of PreambleLength and the size of the access search window ...... 54

Figure 4-3 Structures of the EV-DO Rev. A and EV-DO Rel. 0 access channels ................................................ 55

Figure 4-4 Access probe structure ....................................................................................................................... 58

Figure 5-1 Searching a pilot ................................................................................................................................ 98

CDMA Performance Parameters (EV-DO) V3.3 for Customers Tables


xii

Tables

Table 3-1 Mapping between control channel rates and MAC indexes ................................................................ 25

Table 3-2 DRCLockLength codes ....................................................................................................................... 29

Table 3-3 DRCLockLength codes ....................................................................................................................... 30

Table 4-1 Relation between personality and access parameters. ......................................................................... 71

Table 5-1 PilotDropTimer.................................................................................................................................... 78

Table 5-2 PilotDropTimer.................................................................................................................................... 88

Table 5-3 SearchWindowSize codes.................................................................................................................... 96

Table 5-4 Search window offset coding............................................................................................................. 102

Table 8-1 Default values of conversion probability of reverse rate ................................................................... 155

Table 8-2 Conditions ......................................................................................................................................... 156



1

1 Preface

1.1 Introduction to This Document 1.1.1 Scope

This document systematically describes the functions of configuration parameters related to Huawei EV-DO Rev. A system. It provides the description, type, related commands, value range, default value, setting tradeoff, and remarks of each parameter.

1.1.2 Intended Audience This document is intended for engineers who are familiar with the basic concepts of the EV-DO Rev. A system. It serves as a reference for parameter configuration and change or a manual for training.

1.1.3 Organization This document describes the performance parameters of the EV-DO Rev. A system. It contains 12 chapters.

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 forward control channels, DRCLock channel, reverse DRC channel, ACK channel, and traffic channel.

4 Paging and Access Parameters

The parameters related to paging and access.

5 Handoff Parameters The parameters used in handoff algorithms, handoff determination, and pilot pollution check.

6 Reverse Power Control Parameters

The parameters used in reverse power control algorithms.



2

Section Describes

7 Multi-Flow Packet Application Parameters

The parameters related to the DPA, MFPA, and EMFPA.

8 Admission and Load Control Parameters

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

9 Forward Scheduling Parameters

The parameters related to the scheduling chip used in the forward scheduling algorithm.

10 Reverse Scheduling Parameters

The parameters used in the reverse T2P algorithm.

11 Other Parameters The parameters related to frame exchange and fake NAK.

12 White List Parameters The parameters related to the white list function.

1.1.4 Change History 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

Lv Sha, Xia Xin, and Jing Xiaoyun


Xi Le and Xu Qiongtao

Chapter 4 Paging and Access Parameters

Lv Sha, Xia Xin, and Jing Xiaoyun


Huang Jianzhong and Xu Qiongtao

Chapter 5 Handoff Parameters

Ye Guojun and Deng Zhouyu


Huang Jianzhong, Xi Le, and Zhang Rui



3

Chapter Name Reviewer of the CDMA Network Planning Department

Experts Outside the CDMA Network Planning Department

Author

Chapter 6 Reverse Power Control Parameters

Cui Yalei and Jing Xiaoyun


Che Wei and Wu Yufeng

Chapter 7 Multi-Flow Packet Application Parameters

Zhang Ping and Zou Chuanliang


Huang Jianzhong and Chen Yanming

Chapter 8 Admission and Load Control Parameters

Wang Rong and Deng Zhouyu


Chen Yanming, Ye Guojun, Li Wei, Sun Wenjie, Xu Binbin, and Ren Yuan

Chapter 9 Forward Scheduling Parameters

Wang Rong and Deng Zhouyu


Xu Qiongtao and Li Wei

Chapter 10 Reverse Scheduling Parameters

Cui Yalei, Jing Xiaoyun, and Wang Rong


Li Wei and Ye Guojun

Chapter 11 Other Parameters Zhang Ping, Zou

Chuanliang, and Deng Zhouyu


Huang Jianzhong and Chen Yanming

Chapter 12 White List Parameters

Chen Yanming, Lin Weiyong, Li Xuchao, and Xie Yunjuan

Wang Jianyong and Jiang Wei

Li Wei

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]. CDMA Performance Parameters (EV-DO Rel. A) V1.2 for Engineers.doc

[6]. CDMA Performance Principles (EV-DO Rel. A) V1.0 for Engineers-20070312.doc



4

[7]. 80-V9382-1_J_CSM6800_Driver_Parameters.pdf

1.2 Conventions and Descriptions This document is applicable to V3R6C08 of the BSC.

This document is subject to the latest technical recommendations and notifications.

This document provides descriptions of the parameters, which must be modified according to the latest requirements of Huawei.

The enhancement protocol mentioned in this document and the enhancement parameters are applicable only to ATs with the EV-DO Rev. A attributes. For differences between the enhancement protocol and the default protocol, see protocol-related documents.

The following describes the modules in this document:

Chapter Name: provides a classification of parameters based on functions. For example, parameters described in chapter "Forward Load Control" are related to forward power control.

Parameter Name: provides the name of a parameter described in the Help of the Service Maintenance System.

Description: describes the function of the parameter. Type: describes the type of the parameter, for example, internal algorithm parameter and

air interface parameter. Related Commands: lists the commands that are used to modify or query the parameter. Value Range: lists the value range of the parameter. The value range is closely related to

the specific data structure used by the parameter. Default Value: lists the value that is applicable to most cases (not any cases). The default

value is determined according to setting tradeoff and actual situations. Setting Tradeoff: describes the effects of a high or low value beyond the recommended

range. Remarks: introduces the background information of the parameter.

1.3 Acronyms and Abbreviations Acronym or Abbreviation

Description

BTS Base Transceiver System

BSC Base Station Controller

CDMA Code Division Muti 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

FMR Frame Processing Board



5

Acronym or Abbreviation

Description

SPU Signal Processing Unit

Tx Transmit Power

SPM SectorParametersMessage

RATI Random Access Terminal Identifier

UATI Unicast Access Terminal Identifier

AT Access Terminal

DPA Default Packet Application

MFPA Multi-Flow Packet Application

EMFPA Enhanced Multi-Flow Packet Application

RUR Route Update Request

QCM QuickConfig Message



6

2 System Parameters

The CDMA 1X and EV-DO system messages include the QuickConfig message, Sector Parameters message, Sync message, Access Parameters message, Redirect message, and BroadcastReverseRateLimit message. Among these messages, the QuickConfig message is used to indicate a change in the air interface message and to provide frequently changing parameters such as the color code. The SectorParameter message is used to convey specific sector information such as the information about neighboring cells. The Sync message is used to convey the information about the versions supported by the system, PNoffset, and system time. The AccessParameters message is used to convey the information about the access channel, such as the parameters used in open loop power control, the size of packets transmitted on the access channel, the length of the preamble. The Redirect message is used to redirect the terminals to a different network other than the current network. The BroadcastReverseRateLimit message is used to limit the maximum reverse transmission rate of all terminals working on a specific carrier. This chapter describes the parameters conveyed in the QuickConfig and SectorParameters messages. For the parameters conveyed in other messages, refer to the description in other chapters.

2.1 QuickConfig Message 2.1.1 Color Code (COLORCODE)

Description This parameter specifies the 8-bit binary number. It identifies a subnet and is applicable only to EV-DO networks.

Type Ordinary air interface parameter of the carrier level, specified in the ColorCode field of the QuickConfig.

Related Commands ADD DOCS

MOD DOQCM

LST DOCS

LST DOQCM



7

RMV DOCS

Value Range 0 to 255.

Default Value None. The default value can be set according to actual situations.

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 mappings between SectorID104 and color codes are specified in the MOD DOCS command.

Figure 2-1 shows the mappings between SectorID128 and color code.

Figure 2-1 Mappings between SectorID128 and color code

A color code uniquely identifies a subnet in the AN. To be more specific, the color codes of subnets in the same AN or different ANs must be different from each other. Before adding a CDMA2000 EV-DO carrier or an neighboring AN, you must add the mapping between color codes and SECTORID104. To change the color code of a carrier, you need to ensure that the new color code has been configured because the change of the color code leads to the release of all ongoing sessions in the subnet.



8

2.1.2 SECTORID24 (SECTORID24)

Description This parameter specifies the last 24 bits of SECTORID128. It is used together with the first 104 bits of SECTORID128 to identify an EV-DO sector. It is applicable only to EV-DO networks.

Type Ordinary air interface parameter of the carrier level, specified in the SectorID24 field in the QuickConfig.

Related Commands ADD CDMACH

LST CDMACH

Value Range A 6-bit hexadecimal number that starts with 0x. If the value contains less than 6 bits, zeros are added to the beginning until the width is reached.

Default Value None. The default value can be set according to actual situations.


Remarks Identified by SectorID128, the AN can be configured with multiple subnets. SectorID128 is delivered through the QuickConfig message. Changing SECTORID24 leads to the release of all ongoing sessions in the subnet.

2.1.3 Redirect (DOREDIRECT)

Description This parameter determines whether an access network (AN) is allowed to redirect an access terminal (AT) to other networks.

Type Ordinary air interface parameter of the carrier level, specified in the Redirect field in the QuickConfig message.



9

Related Commands MOD DOQCM

LST DOQCM

Value Range NO (not to redirect)/YES (to redirect).

Default Value NO.


Remarks DO redirection can be used for network reselection, but it may cause the AT to drop from the network. Therefore, use this function with caution.

2.1.4 SECTORID104(SECTORID104)

Description This parameter specifies the first 104 bits of SECTORID128. It uniquely identifies a subnet in the world. Each SECTORID104 maps to a unique color code.

Type Ordinary parameter of the carrier level.

Related Commands MOD DOCS

LST DOCS

Value Range A 26-bit hexadecimal number that starts with 0x. If the value contains less than 26 bits, zeros are added to the beginning until the width is reached.

Default Value Set according to actual situations.




10

Remarks None.

2.2 SectorParameters Message 2.2.1 Subnet Mask (SUBNETMASK)

Description This parameter is a 128-bit binary. From this parameter, the number of the subnet can be obtained. If this number changes, this indicates that the AT moves to a new subnet.

Type Ordinary air interface parameter of the carrier level, specified in the SubnetMask field in the SectorParameters message.

Related Commands MOD DOSPM

LST DOSPM


Default Value 104.


Remarks The AT obtains SectorID128 and Subnet Mask of the current sector from the system message and performs the AND calculation to obtain the address of the subnet to which the current sector belongs. Then, the AT performs the AND calculation based on UATI and UATI Subnet Mask that are stored on it to obtain the address of the subnet to which the AT belongs. If the two addresses are the same, this indicates that the AT resides within the subnet. If the two addresses are not the same or Subnet Mask is not equal to UATI Subnet Mask, this indicates that the AT resides beyond the subnet.



11

2.2.2 Local Time Offset (DOLTMOFF)

Description This parameter specifies the offset between the local time and the Greenwich time, which is configured on the AN. The unit of this parameter is 30 minutes. When the system contains DOLTMOFF in a message, the unit of this parameter is automatically converted into minutes, indicating a signed integer of 2's complement. The value of this parameter is in Greenwich Mean Time (GMT) format. The time in the eastern time zone is in the format of GMT+time and that in the western time zone is in the format of GMT-time. For example, the time in east 08 time zone is GMT+08:00 and that in west 05 time zone is GMT-05:00.

Type Ordinary air interface parameter of the carrier level, specified in the LocalTimeOffset field in the SectorParameter message.


LST DOSPM

Value Range LF8 (GMT-12:00) LF33 (GMT+00:30)

LF9 (GMT-12:30) LF34 (GMT+01:00)

LF10 (GMT-11:00) LF35 (GMT+01:30)

LF11 (GMT-11:30) LF36 (GMT+02:00)

LF12 (GMT-10:00) LF37 (GMT+02:30)

LF13 (GMT-10:30) LF38 (GMT+03:00)

LF14 (GMT-09:00) LF39 (GMT+03:30)

LF15 (GMT-09:30) LF40 (GMT+04:00)

LF16 (GMT-08:00) LF41 (GMT+04:30)

LF17 (GMT-08:30) LF42 (GMT+05:00)

LF18 (GMT-07:00) LF43 (GMT+05:30)

LF19 (GMT-07:30) LF44 (GMT+06:00)

LF20 (GMT-06:00) LF45 (GMT+06:30)

LF21 (GMT-06:30) LF46 (GMT+07:00)

LF22 (GMT-05:00) LF47 (GMT+07:30)

LF23 (GMT-05:30) LF48 (GMT+08:00)

LF24 (GMT-04:00) LF49 (GMT+08:30)



12

LF25 (GMT-04:30) LF50 (GMT+09:00)

LF26 (GMT-03:00) LF51 (GMT+09:30)

LF27 (GMT-03:30) LF52 (GMT+10:00)

LF28 (GMT-02:00) LF53 (GMT+10:30)

LF29 (GMT-02:30) LF54 (GMT+11:00)

LF30 (GMT-01:00) LF55 (GMT+11:30)

LF31 (GMT-01:30) LF56 (GMT+12:00)

LF32 (GMT+00:00)

The time offsets for different time zones are:

West 12 time zone: LF8-8 (GMT-12 00) … West 01 time zone: LF30-30 (GMT-01:00) Greenwich: LF32-32 (GMT+00 00) East 01 time zone: LF34-34 (GMT+01:00) … East 12 time zone: LF56-56 (GMT+12:00)

Default Value LF48 (GMT+08:00), indicating the east 08 time zone.

Setting Tradeoff Set according to the time zone of the system.

Remarks None.

2.2.3 Route Update Radius (ROUTEUP)

Description This parameter specifies the distance threshold that determines whether an AT performs location update. When an AT moves to a new area, the AT calculates the distance (represented by r) between the new area and the area where it sent a RouteUpdate message the last time. If distance r exceeds the distance threshold, the AT sends a RouteUpdate message.

Type Ordinary air interface parameter of the carrier level, specified in the RouteUpdateRadiusOverhead field in the SectorParameters message.



13


LST DOSPM

Value Range 0 to 2047 (in seconds)

Default Value 0, which indicates that distance based route update is not performed

Setting Tradeoff If this parameter is set to a high value, the AT sends a RouteUpdate message only after it moves a long distance. Thus, the route is not updated timely. If this parameter is set to a low value, the AT frequently sends the RouteUpdate message. This may cause wastage of resources.

Remarks The settings of ROUTEUP are based on rm x ro + ra, where rm is the attribute of RouteUpdateRadiusMultiply, ro is the route update radius, and ra is the attribute of RouteUpdateRadiusAdd. The attributes of RouteUpdateRadiusMultiply and RouteUpdateRadiusAdd are obtained through GAUP negotiation.

The formula to calculate distance r is as follows:

In this formula, xL and yL are respectively the longitude and latitude of the sector where the AT sent the RouteUpdate message the last time. xC and yC are respectively the longitude and latitude of the sector where the AT currently resides. π is the circumference ratio, and ⎣ ⎦ indicates rounding down. The longitudes and latitudes involved in this formula are measured in 1/4 seconds.

2.2.4 Sector ChannelNo. Included (SCTARFCNLSTINCL)

Description This parameter determines whether the frequency list sent in the SectorParameters message is specified.




14


LST DOSPM

Value Range YES (sector frequency list specified by the user), or NO (default configuration).

Default Value NO.


Remarks By default, the sector frequency list contains only the EV-DO Rel 0 carriers if EV-DO Rel 0 carriers and EV-DO Rev A carriers coexist in the sector. In other cases, the sector frequency list contains all carriers of the sector.

2.2.5 ChannelNo. List (ARFCNLST)

Description This parameter specifies the frequency list specified by the user and sent in the SectorParameters message.



LST DOSPM

Value Range The frequency list is entered in the format of "ARFCN&BNDCLS, ARFCN&BNDCLS, …", where ARFCN ranges from 0 to 2047 and BNDCLS ranges from 0 to 17.


Setting Tradeoff

None.



15

Remarks None.

2.2.6 Sector Extended ChannelNo. Included (SCTEXTARFCNLSTINCL)

Description This parameter determines whether the SectorParameters message sent by the AN contains the extended frequency list.

Type Ordinary air interface parameter of the carrier level, specified in the ExtendedChannelIncluded field in the SectorParameter message.


LST DOSPM

Value Range YES (sector extended frequency list specified by the user), or NO (default configuration).

Default Value NO.


Remarks Default settings of the system: The SCTEXTARFCNLSTINCL parameter contains only the information about the EV-DO Rev. A carriers only if the EV-DO Rel. 0 carrier and EV-DO Rev. A carrier coexist in the sector. An EV-DO Rel. 0 terminal cannot retrieve the extended frequency list, whereas an EV-DO Rev. A terminal combines the default frequency list and the extended frequency list. From the combined frequency list, the EV-DO Rev. A terminal selects a frequency for residence by use of the HASH algorithm.

2.2.7 Extended ChannelNo. List (EXTARFCNLST)

Description This parameter specifies the extended frequency list sent in the SectorParameters message.



16

Type Ordinary air interface parameter of the carrier level, specified in the ExtendedChannelIncluded field in the SectorParameter message.


LST DOSPM

Value Range The frequency list is entered in the format of "ARFCN&BNDCLS, ARFCN&BNDCLS, …", where ARFCN ranges from 0 to 2047 and BNDCLS ranges from 0 to 17.



Remarks When ExtendedChannelIncluded is set to Yes, the frequency list to be delivered is required. If the extended channel list need not convey any information about frequencies, the EXTARFCNLST parameter must be set to – through the MOD DOSPM command (MOD DOSPM: SCTEXTARFCNLSTINCL=YES, EXTARFCNLST="-"). If the EXTARFCNLST parameter is not set to –, the extended channel list conveys the information about all the frequencies.

2.2.8 Access Hashing Channel Mask List Included (ACCHSHCHNMASKLSTINCL)

Description This parameter determines whether the specified SectorParameters message contains the access hashing channel mask list.

Type Ordinary air interface parameter of the carrier level, specified in the AccessHashingChannelMaskIncluded field in the SectorParameter message.


LST DOSPM



17

Value Range YES (access hashing channel mask list specified by the user), or NO (default configuration)

Default Value NO


Remarks The AT combines the default frequency list and the extended frequency into a new frequency list. If the ACCHSHCHNMASKLSTINCL parameter is set to 0, the set of available frequencies is the current frequency list. If the ACCHSHCHNMASKLSTINCL parameter is set to 1, the AT performs the AND calculation by using bit 0 to bit AccessHashingChannelMaskLength of the AccessHashingClassMask parameter together with the ACCHSHCHNMASKLST parameter. After the calculation is complete, the AT selects the frequencies that have the maximum number of 1s as the set of available frequencies. In this way, different ATs can reside on different frequencies.

2.2.9 Access Hashing Channel Mask List (ACCHSHCHNMASKLST)

Description This parameter specifies the access hashing channel mask list sent in the SectorParameters message. The format of the mask list is ARFCN&CHMASK.

Type Ordinary air interface parameter of the carrier level, specified in the AccessHashingChannelMask field in the SectorParameter message.


LST DOSPM

Value Range ARFCN ranges from 0 to 2047, and CHMASK ranges from 0 to 65535.

Default Value 0.




18

Remarks Default settings of the system: If the EV-DO Rel. 0 carrier and EV-DO Rev. A carrier coexist in the sector, the masks of the former two carriers are 0x0000 and 0xfffe respectively; in the case that there are only EV-DO Rel. 0 carriers or EV-DO Rev. A carriers in the sector, the masks of them are blank.

2.2.10 Route Update Trigger Code Included (ROUTEUPDATETRGCODIND)

Description This parameter determines whether the specified SectorParameter message contains the route update trigger code.

Type Ordinary air interface parameter of the carrier level, specified in the RouteUpdateTriggerCodeIncluded field in the SectorParameter message.


LST DOSPM

Value Range YES (contained), or NO (not contained).

Default Value YES


Remarks None.

2.2.11 Route Update Trigger Code (ROUTEUPDATETRGCOD)

Description This parameter is used together with the subnet ID to identify an entity in the route update trigger list to trigger the RouteUpdate message.



19

Type Ordinary air interface parameter of the carrier level, specified in the RouteUpdateTriggerCode field in the SectorParameter message.


LST DOSPM

Value Range

0 to 4095.

Default Value

0.

Setting Tradeoff

None.

Remarks RouteUpdateTriggerCode is similar to the RegZone mechanism in 1X networks. It can be used as a method for triggering registration. The AN carries RouteUpdateTriggerCode and RouteUpdateTriggerMaxAge in the SectorParameters message. RouteUpdateTriggerCode indicates the carrier code, and RouteUpdateTriggerMaxAge indicates the lifecycle of the code. The AT stores the code list RouteUpdateTriggerCodeList, each entry of which is (Subnet, RouteUpdateTriggerCode). The list length RouteUpdateTriggerCodeListSize is determined through negotiation between the AN and the AT. It ranges from 1 to 5. In idle mode, the AT maintains the list and triggers the RouteUpdate message according to the following principles:

1. Entries (except those added to the list at a time) that exist in the list for more than 2(RouteUpdateTriggerMaxAge + 3) x 1.28 seconds are deleted from the list.

2. If the items added to the list lately exist in the list for more than 2(RouteUpdateTriggerMaxAge + 3) x 1.28 seconds, the timer restarts.

3. After an idle handoff is complete, if the (Subnet, RouteUpdateTriggerCode) entries received from the new carries are not in the list RouteUpdateTriggerCodeList, these entries are added to the list, the corresponding timer is initialized to 0, and the RouteUpdate message is sent. If the list length exceeds the value of RouteUpdateTriggerCodeListSize, the AT deletes the earliest entry to retain the list length within the limit of RouteUpdateTriggerCodeListSize.

2.2.12 Route Update Trigger Max Age (ROUTEUPDATETRGMAXAGE)

Description This parameter specifies the maximum time that the items can be kept in the route update trigger list. When an entity exists in the route update trigger list for more than 2RouteUpdateTriggerMaxAge x 1.28 seconds, the entity is deleted from the route update trigger code list. The items added to the list lately are excluded.



20

Type Ordinary air interface parameter of the carrier level, specified in the RouteUpdateTriggerMaxAge field in the SectorParameter message.


LST DOSPM


Default Value 0.

Setting Tradeoff If this parameter is set to a great value, the AT sends the RouteUpdate messages to update the route less frequently in the boundary areas. In this case, the load on the access channel is reduced but this may lead to delay of route update. If this parameter is set to a small value, the AT frequently sends the RouteUpdate message in the boundary areas. Thus, the load on the access channel increases.

Remarks For details, see "Route Update Trigger Code (ROUTEUPDATETRGCOD)."

2.2.13 Prior Session GAUP (PRSESSIONGAUP)

Description This parameter determines whether to initiate the PriorSession negotiation through the GAUP.

Type Ordinary air interface parameter of the carrier level, specified in the PriorSessionGAUP field in the SectorParameter message.


LST DOSPM

Value Range YES (initiate), or NO (not initiate).



21

Default Value NO.

Setting Tradeoff When the AN contains the PriorSessionGAUP field, the AN sets PriorSessionGAUP to 0 if it does not want to include the PriorSession attribute in the Attribute Update Request message, or the AN sets PriorSessionGAUP to 1 if it wants to include the PriorSession attribute in the Attribute Update Request message. If the overhead message protocol does not contain PriorSessionGAUP or contains PriorSessionGAUP=0, the AT does not include the PriorSession attribute in the AttributeUpdateRequest message. If the overhead message protocol contains PriorSessionGAUP=1, the AT includes the PriorSession attribute in the AttributeUpdateRequest message.

Remarks The generic attribute update protocol (GAUP) is a new protocol used in the EV-DO Rev A. It enables dynamic configuration and update of attributes (such as update of the information about IPFLOW, configuration and reconfiguration of IPFLOW, exiting of IPFLOW) without disconnection of links. In normal cases, the configuration and exiting of the GAUP is initiated by the AT by updating the ReservationKKQosRequestFwd/Rev attribute. If the UATIRequest message that is sent by the AT when the AT enters another subnet contains the RATI, the AT can initiate the PriorSession negotiation during the session negotiation process to request for the original session attributes. In this way, the configuration and negotiation process is simplified (if the AT uses the original session attributes, the AN can obtain sessions through session migration).

2.3 Configuration of the Session Protocol 2.3.1 Session Close Timer (TSMPCLOSE)

Description This parameter specifies the time length for a session to be kept on the AT and AN when there are no signaling and service exchange. Both the AT and AN monitor service flows on the forward and reverse channels. If the AT or AN receives no signaling or service exchange during the TSMPClose or NSMPKeepAlive minutes, the AT or AN sends the KeepAliveRequest message. After the AN or AT receives the KeepAliveRequest message, the AN or AT responds with the KeepAliveResponse message. If there are no responses to the KeepAliveRequest message for NSMPKeepAlive consecutive times, the AT or AN sends a message to request for the session to be released.

Type Global air interface parameter, specified in the TSMPClose field of the Configuration Request message during the configuration and negotiation of the session protocol.

Related Commands MOD DOGCNPA



22

LST DOGCNPA

Value Range 0 to 65535 (unit: minute).

Default Value Different personalities can be set to different values. For details, see 错误！未找到引用源。.

Setting Tradeoff If this parameter is set to a high value, the time length for a session to be retained on the AN and AT is long. In this case, the resources of the AT are wasted. If this parameter is set to a low value, old sessions are frequently released and new sessions are frequently established. In this case, the load on the system is high.

Remarks The PARC platform supports a maximum of five SMUs, and each SMU supports 400, 000 sessions. The MUSA platform supports 350, 000 sessions if the EPU is used, or supports 110, 000 sessions if the GPU is used.

2.4 Other System Parameters 2.4.1 EV-DO Carriers Protocol Version (EVDOPROVER)

Description This parameter specifies the protocol version supported by carriers.


Related Commands MOD CDMACH

LST CDMACH

Value Range RELEASEA(EV-DO Revision A)

RELEASE0(EV-DO Release 0)

Default Value RELEASE0(EV-DO Release 0)



23

Setting Tradeoff Configured according to the operations schemes of the operator.

Remarks If this parameter is set to RELEASE0(EV-DO Release 0), you can infer that carriers of the sector does not support the EV-DO A services.

2.4.2 Periodic Authorization Switch (REAUTHSW)

Description This parameter determines whether to enable periodical check of the validity of a user.

Type Ordinary parameter of the BSC level.

Related Commands MOD DOGP

LST DOGP

Value Range ON (enable), or OFF (disable).

Default Value OFF.

Setting Tradeoff Configured according to requirements of the operator.

Remarks None.



24

3 Channel Parameters

3.1 Forward Channel Parameters 3.1.1 CCH Rate (CCHRATE)

Description This parameter specifies the rate of the control channel.


Related Commands MOD DOCCHP

LST DOCCHP

Value Range RATE76K8 (76.8 kbit/s), or RATE38K4 (38.4 kbit/s).

Default Value RATE76K8 (76.8 kbit/s).

Setting Tradeoff The control channel data rate is a balance between the reliability of the control channel and the number of slots required for transmission of the control channel information. A 38.4 kbit/s control channel is more reliable than a 76.8 kbit/s control channel. The 38.4 kbit/s control channel uses 16 timeslots to send a data packet. The 76.8 kbit/s control channel uses 8 timeslots to send a data packet (this can improve the capacity of the control channel and the traffic channel and the general data throughput but may decrease the coverage of the control channel).



25

Remarks The control channel preamble uses an 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. The three control channel rates with MACIndex = 71 are used for the sub-synchronization control channel.

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

MACIndex Control Channel Rate CCH Packet Format

2 76.8 kbit/s (1024, 8, 512)

3 38.4 kbit/s (1024, 16, 1024)

19.2 kbit/s (128, 4, 1024)

38.4 kbit/s (256, 4, 1024)

71

76.8 kbit/s (512, 4, 1024)

The AN uses the control channel to send general messages and user indication messages to the AT. General messages include the QuickConfig, SPM, Syn, APM, BroadCastReverseRateLimit, and Redirect messages. User indication messages include the TCA, UATIAssignment, and HardwareIDRequest message.

3.1.2 CCH Capsule Offset (CAPSULEOFFSET)

Description This parameter specifies the offset of the synchronous control channel cycle to the control channel cycle, as 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 generated when the AT demodulates the synchronization control channels of the sectors and increases the probability of correct demodulation of the synchronous control capsules by the AT.

Figure 3-1 Transmission cycle of the control channel



26

Type Ordinary parameter of the carrier level, specified in the Offset field of the packet header of the control channel.

Related Commands MOD DOCCHP

LST DOCCHP

Value Range 0 to 3, measured in timeslots.

Default Value 0.

Setting Tradeoff Different offsets should be configured for two adjacent sectors. This can prevent synchronous transmission of the synchronization channels of the two adjacent sectors, thus avoiding interference between capsules of the synchronization channels of the two adjacent sectors.

Remarks The parameter is specified by the AN in the Offset field of the control channel header of the first control channel MAC layer packet that is contained in the synchronous packet.

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 packet of the synchronous capsule 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. T is the CDMA system time measured in 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.

3.1.3 DRC Lock Period (DRCLockPeriod)

Description This parameter specifies the number of timeslots between two continuous DRCLock bits that are transmitted on the forward MAC channel.

As defined in protocols, this parameter can be set to the following values.



27

Type Air interface parameter of the carrier level.

Related Commands MOD DOCNPA

LST DOCNPA

Value Range Slots8 (8 timeslots), or Slots16 (16 timeslots).

Default Value Slots16.

Setting Tradeoff If this parameter is set to 0, the AN can quickly report the changes of the DRCLock Bit value and timely respond to the changes, but the rate of the RPC channel decreases. If this parameter is set to 1, the reliability for the AT to correctly receive DRCLock information is improved.

Remarks The DRCLock channel is used for the AN to send DRCLock information to the AT. This parameter is specified in the DRCLockPeriod field of the DRCLock property table when the forward traffic channel MAC protocol configures negotiation. The DRCLock channel and the RPC channel are time-division multiplexed. They are transmitted on the same MAC channel. The DRCLock channel is inserted into the RPC channel once each 8 or 16 timeslots, and this process is repeated for DRCLockLength times, as shown in Figure 3-2. The data rate of the DRCLock channel is 600/(DRCLockLength x DRCLockPeriod) bit/s, and the data rate of the RPC channel is 600 x (1 – 1/DRCLockPeriod) bit/s.



28

Figure 3-2 DRCLock bit transmission

The AT processes the DRCLock bits received from the DRCLock channel according to the forward traffic channel protocol. Then according to SofterHandoff specified in the route update protocol, the AT decides whether to enable two different sectors to transmit the same DRCLock bit. If the AT receives the DRCLock bit from the sector to which the AT's DRC directs and which is set to 0, the AT should stop directing its DRC to the sector.

3.1.4 Default Protocol DRC Lock Length (DRCLockLength)

Description This parameter specifies the repetition times of the DRCLock bit transmitted on the forward MAC channel in the EV-DO Rel. 0 system.

Type Air interface negotiated parameter of the carrier level.


LST DOCNPA

Value Range TIMES4 (4 times), TIMES8 (8 times), TIMES16 (16 times), TIMES32 (32 times).

Default Value TIMES8.

Setting Tradeoff If this parameter is set to a low value, the time that the DRCLock bit requires to change is short, and the lock status of the channel can be updated in time. The reliability of the DRCLock bit transmission, however, is very low. If this parameter is set to a high value, the time that the DRCLock bit requires to change is long, but the reliability of the DRCLock bit transmission is improved.



29

Remarks By default, this parameter is specified in the DRCLockLength field of the DRCLock property table when forward traffic channel MAC protocol configures negotiation, as shown in Table 3-2.

Table 3-2 DRCLockLength codes

Field Value DRCLockLength

00 4

01 8

10 16

11 32

For details, see the DRCLock Bit Transmission Interval (DRCLOCKPERIOD).

3.1.5 Enhanced Protocol DRC Lock Length (ENHDRCLOCKLENGTH)

Description This parameter specifies the repetition times of the DRCLock bit transmitted on the forward MAC channel in the EV-DO Rev. A system.

Type Air interface negotiated parameter of the carrier level.


LST DOCNPA

Value Range TIMES8 (8 times), TIMES16 (16 times), TIMES32 (32 times), or TIMES64 (64times).

Default Value TIMES16.

Setting Tradeoff If the value of this parameter is small, the times for DRCLock bit changes is short, and the lock status of the channel can be updated in time. The reliability of the DRCLock bit transmission, however, is very low. If the value of this parameter is large, the times for DRCLock bit changes becomes longer, but the reliability of the DRCLock bit transmission is improved.



30

Remarks By default, this parameter is specified in the DRCLockLength field of the DRCLock property table when enhanced forward traffic channel MAC protocol configures negotiation, as shown in Table 3-3.

Table 3-3 DRCLockLength codes

Field Value ENHDRCLOCKLENGTH

00 8

01 16

10 32

11 64

3.1.6 Asynchronous Message Resending Switch (ASYNCRSNDSWT)

Description This parameter specifies the switch that enables or disables retransmission of asynchronous messages on the control channel.

Type Ordinary parameter of the BTS level.

Related Commands SET CBTSCDMADOCTRLPARA

DSP CBTSCFG

Value Range OFF (disabled), or ON (enabled).

Default Value OFF.




31

Remarks This switch is disabled unless otherwise specified.

3.1.7 Layer 2 Acknowledgement Resending Times (L2ACKRSNDNM)

Description This parameter specifies the number of times the ACAck message is retransmitted. If this parameter is set to 0, the BTS does not retransmit the ACAck message.

Type BTS internal parameter.


DSP CBTSCFG

Value Range 0 to 15

Default Value 2


Remarks The recommended value is 0.

3.1.8 Asynchronous Message Lifetime Switch (ASYNCLTSWT)

Description This parameter specifies the switch that enables or disables adjustment of the cycle of asynchronous messages on the BTS.





32

DSP CBTSCFG

Value Range OFF (disabled), or ON (enabled).

Default Value OFF.


Remarks None.

3.1.9 Asynchronous Message Transmission Rate(ASYNCSNDRT)

Description This parameter specifies the asynchronous message transmission rate. If the actual transmission rate exceeds the value of this parameter, asynchronous messages are transmitted. If this parameter is set to 0, asynchronous messages are immediately transmitted.



DSP CBTSCFG

Value Range 0 to 100, measured in %.

Default Value 0.


Remarks None.



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3.1.10 Asynchronous Message Lifetime Unit (ASYNCLTUNT)

Description This parameter specifies the unit of the cycle of asynchronous messages. The system periodically transmits asynchronous messages according to the settings of this parameter.



DSP CBTSCFG

Value Range 20 to 255, measured in slots.

Default Value 30.


Remarks None.

3.1.11 Layer 2 Acknowledgement Lifetime (L2ACKLT)

Description This parameter specifies the cycle of the ACAck message.



DSP CBTSCFG

Value Range 1 to 255, with the unit ASYNCLTUNT.



34

Default Value 26.


Remarks This parameter is available only when the asynchronous message retransmission switch is enabled.

3.1.12 Control Channel IIR Filter Time Constant (DRCTMCNST)

Description This parameter specifies the control channel single-carrier infinite impulse response (IIR) filter time constant. The filter is used for locking the rate of the control channel.

Type BTS internal parameter

Related Commands SET CBTSCDMADOCHIPPARA

DSP CBTSCFG

Value Range 1 to 255 (unit: slot).

Default Value Default value of the CSM5500 chip: 32. Default value of the CSM6800 chip: 16.


Remarks None.

3.1.13 Control Channel IIR Filter Lock Threshold (DRCLCKTHD)

Description This parameter specifies the control channel single-carrier IIR filter locking threshold. The filter is used for locking the rate of the control channel.



35



DSP CBTSCFG




Remarks None.

3.1.14 Control Channel IIR Filter Unlock Threshold (DRCUNLCKTHD)

Description This parameter specifies the control channel single-carrier IIR filter unlocking threshold. The filter is used for locking the rate of the control channel.



DSP CBTSCFG





36


Remarks None.

3.1.15 Control Channel Idle Timeslot Gain (IDLSLTGN)

Description This parameter specifies the gain of the idle timeslot of the control channel.



DSP CBTSCFG

Value Range –560 to 0

Default Value Default value of the CSM5500 chip: –96. Default value of the CSM6800 chip: –96.


Remarks None.

3.1.16 Forward Traffic Channel IIR Filter Time Constant (FLDRCTMCNST)

Description This parameter specifies the forward traffic channel single-carrier IIR filter time constant. The filter is used for locking the rate of the forward traffic channel. The check is performed when the AT starts or stops the data rate control of the sector.



37



DSP CBTSCFG

Value Range 1 to 255 (unit: slot).



Remarks None.

3.1.17 Forward Traffic IIR Filter Locking Threshold (FLDRCLCKTHD)

Description This parameter specifies the forward traffic channel single-carrier IIR filter locking threshold. The filter is used for locking the rate of the forward traffic channel. The check is performed when the AT starts or stops the data rate control of the sector.



DSP CBTSCFG

Value Range –560 to 0.

Default Value Default value of the CSM5500 chip: 140.



38

Default value of the CSM6800 chip: 140.


Remarks None.

3.1.18 Forward Traffic IIR Filter Unlock Threshold (FLDRCUNLCKTHD)

Description This parameter specifies the forward traffic channel single-carrier IIR filter unlocking threshold. The filter is used for locking the rate of the forward traffic channel. The check is performed when the AT starts or stops the data rate control of the sector.



DSP CBTSCFG

Value Range –560 to 0.



Remarks None.

3.2 Reverse Channel Parameters



39

3.2.1 Default Protocol DRC Gating (DRCGATING)

Description This parameter determines whether the DRC data is transmitted continuously on the DRC channel, specified in the default protocol. When the value is set to CONTINUOUS(YES), the data is transmitted continuously in each timeslot (total number of timeslots: DRCLength) on the DRC channel. When the value is set to DISCONTINUOUS(NO), the DRC data transmission on the DRC channel is not continuous, and the DRC data is transmitted only in one timeslot (total number of timeslots: DRCLength).

Type Air interface parameter of the carrier level, specified in the DRCGating field of the DRCGating attribute table when the default forward traffic channel refers to the MAC protocol for configuration negotiation. The default value used in the protocol is 0 in continuous transmission mode.


LST DOCNPA

Value Range CONTINUOUS, or DISCONTINUOUS.

Default Value CONTINUOUS.

Setting Tradeoff If DRCGating is set to DISCONTINUOUS, the interference on the reverse link is reduced but the reliability of the DRC channel becomes lower. When the value is CONTINUOUS, the reliability of the DRC channel is higher, but the interference on the reverse link becomes higher and the reverse capacity becomes lower.

Remarks None.

3.2.2 Enhanced Protocol DRC Gating (ENHDRCGATING)

Description This parameter determines whether each DRC value is transmitted on timeslots (total number of timeslots: DRCLength) when the DRC channel is set to continuous transmission. When the value is set to CONTINUOUS(YES), and the value of DRCGating is set to 0, the data is transmitted continuously in each timeslot on the DRC channel. When the value is set to DISCONTINUOUS(NO), the DRC data transmission on the DRC channel is not continuous, and the DRC data is transmitted only in one timeslot.



40

Type Air interface parameter of the sector carrier level, specified in the DRCGating field of the DRCGating attribute table when the enhanced forward traffic channel refers to the MAC protocol for configuration negotiation. The default value used in the protocol is 0 in continuous transmission mode.


LST DOCNPA

Value Range CONTINUOUS, or DISCONTINUOUS.

Default Value CONTINUOUS.

Setting Tradeoff If DRCGating is set to DISCONTINUOUS, the interference on the reverse link is reduced but the reliability of the DRC channel is also reduced. When the value is CONTINUOUS, the reliability of the DRC channel is higher, but the interference on the reverse link is higher and the reverse capacity is lower.

Remarks None.

3.2.3 Enhanced Protocol DRC Offset 1/2/3/4/5/6/7/8/9/A/B/C/D/E (DRCOFFSET1/2/3/4/5/6/7/8/9/A/B/C/D/E)

Description This parameter specifies the DRC offset corresponding to different DRC values. The DRC value sent by the AT is actually equal to the temporary DRC value (determined by C/I) minus the value of DRC Offset N corresponding to temporary DRC value. N indicates a hexadecimal numeral corresponding to DRC Value Index.

Type Air interface parameter of the carrier level, specified in the DRCTranslationOffset attribute when the enhanced forward traffic channel refers to the MAC protocol for configuration negotiation.


LST DOGCNPA



41

Value Range Listed in the following table.

Default Value Listed in the following table.

Parameter Name

Value Range

Personality 0

Personality 1

Personality 2

Personality 3

DRCOffset1 0 to 1 0 0 0 0









DRCOffsetA 0 to 15 0 0 0 0

DRCOffsetB 0 to 15 0 0 0 0

DRCOffsetC 0 to 15 0 0 0 0

DRCOffsetD 0 to 15 0 0 0 0

DRCOffsetE 0 to 15 0 0 0 0

Setting Tradeoff When this parameter is set to 0, this indicates that the DRC value requested by the AT is determined on the basis of C/I. A greater value may reduce the forward throughput because the types of packet sizes that are selected by the AN and are used for forward data transmission are limited. A smaller value cannot satisfy the QoS requirements of the services requiring that the PER of the physical layer must greatly lower than 1%.

Remarks The parameter is available only when the forward traffic channel protocol is the enhancement protocol.

3.2.4 Reverse Link Status Time Constant(RLSTATUSTMCNST)



42

Description This parameter specifies the time constant of the single-carrier IIR filter of the reverse traffic channel. The filter is used for locking the reverse traffic channel.



DSP CBTSCFG

Value Range –560 to 0

Default Value Default value of the CSM5500 chip: 64 Default value of the CSM6800 chip: 780


Remarks None.



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4 Paging and Access Parameters

4.1 Paging Parameters 4.1.1 Small Slot Cycle Allowed (SMALLSLTALLOW)

Description This parameter determines whether the short-timeslot period is allowed, that is, whether the value of SlotCycle 1 can be smaller than 6.

Type Globally configured negotiation parameter, specified in the simple attribute SmallSlotCycleAllowed of the enhanced idle state protocol for configuration negotiation.


LST DOGCNPA

Value Range YES, or NO.

Default Value YES.

Setting Tradeoff If the short-timeslot period is allowed, the paging duration is shorter, but the number of times for the AT interception is increased, and the standby duration is shorter.

Remarks For the 1XEV-DO REV. A, the period and timeslot for the AT to intercept the control channel complies with the following formula:



44

(T + 256 x R) mod Period = offset

The following figure shows the formula for calculating the value of Period.

When the value of slotcycle is 6, the value of Period is (26) x 4= 256 slots, the value of T is offset + 256 x n, the period of the control channel of the system is 256 slots, and thus the Page message is delivered through the synchronization control channel. When the value of slotcycle is greater than 6, the value of T is offset + 256 x n. Therefore, the Page message is delivered through the synchronization control channel when the value of slotcycle is equal to or greater than 6.

When the value of slotcycle is 5, the value of Period is (25) x 4= 128 slots, the value of T is offset + 128 x n, and thus the period of the control channel of the system is 256 slots. When n = 1 and T = 128 + offset, the value of T is smaller than 256, and thus it is the same as the time of a sub-synchronization control channel. Therefore, the Page message can be delivered through this sub-synchronization control channel. Similarly, when the value of slotcycle is small than 6, the Page message may be delivered through a sub-synchronization control channel.

4.1.2 Access Hashing Class Mask (ACCHASHCLASSMASK)

Description This parameter specifies the access Hash type mask. This parameter and the AccessHashingChannelMask parameter determine the input of the Hash algorithm of the 1XEV-DO REV. A AT, and thus determine which frequency (in the frequency list) where the AT resides.

Type Globally configured negotiation parameter, specified in the simple attribute AccessHashingClassMask of the enhanced idle state protocol for configuration negotiation.


LST DOGCNPA

Value Range 0 to 65535 (unit: none)

Default Value 65534



45


Remarks None.

4.1.3 Slot Cycle 1 (SLTCYCLE1)

Description This parameter specifies the timeslot period 1.

Type Globally configured negotiation parameter, specified in the SlottedMode attribute table of the enhanced idle state protocol for configuration negotiation.


LST DOGCNPA


Default Value 9.

Setting Tradeoff When the value is small, the interval for the AT to intercept the paging channel is short, and the paging delay becomes short. In this case, the number of times for the AT interception, however, increases, and the standby duration decreases.

The value is related to waking times, which determines the length of the time segment, Period 1, Period 2, and Period 3. If the timeslot period is short, and waking times is great, the AT standby duration is greatly affected. Therefore, the timeslot period and the waking times should be balanced.

Remarks The 1X&EV-DO Rev. A enhanced idle state protocol specifies that the AT in the idle state has three time segments. In the time segments, the interception periods can be different. The time segments are calculated through T12 and T23. The following figure shows the relevant formulas.



46

The interception period of each time segment is as follows:

The value of Period is specified by the timeslot period.

In the preceding figure, SlotCyclei indicates the timeslot period, and i can be 1, 2, or 3.


Description This parameter specifies the timeslot period 2. For details, see the description of SLTCYCLE1.



LST DOGCNPA


Default Value 9

Setting Tradeoff For details, see the description of SLTCYCLE1.



47

Remarks The value of this parameter must be greater than that of SlotCycle 1.


Description This parameter specifies the timeslot period 3. For details, see the description of SLTCYCLE1.



LST DOGCNPA

Value Range 0 to 28 (unit: none).

Default Value 9.


Remarks The value of this parameter must be greater than that of SlotCycle 2.

4.1.6 Wake Count 1 (WAKECOUNT1)

Description This parameter specifies the waking times 1. For details, see the description of SLTCYCLE1.





48

LST DOGCNPA


Default Value 0.


Remarks None.

4.1.7 Wake Count 2 (WAKECOUNT2)

Description This parameter specifies the waking times 2. For details, see the description of SLTCYCLE1.



LST DOGCNPA


Default Value 0.


Remarks None.

ved.



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4.1.8 Route Update Radius Addend (ROUTEUPDATERADIUSADD)

Description This parameter specifies the radius increment when the AT location is updated.

Type Globally configured negotiation parameter.


LST DOGCNPA


Default Value 0.


Remarks The paging range is calculated on the basis of the distance between the serving BTS and the BTS where the AT sends the RouteUpdate message last time. xL and yL respectively represent the longitude and latitude of the BTS where the AT sends the RouteUpdate message last time. xc and yc stand for the longitude and latitude of the serving BTS. The following formula is used to calculate the distance between the two BTSs.

If r ≤ rm x ro + ra, the paging message is issued within the coverage of the serving BTS. Here, ro stands for the field RouteUpdateRadiusOverhead carried in SectorParameters. rm (route update radius multiplier) and ro (route update radius addend) represent the attributes for negotiation configuration.



50

4.1.9 Route Update Radius Multiplier (ROUTEUPDATERADIUSMULTIPLY)

Description This parameter is used to set the radius decrease quotient when the AT location is updated.



LST DOGCNPA


Default Value 0.


Remarks For details, refer to the remarks of ROUTEUPDATERADIUSADD.

4.1.10 Route Update Radius Addend (ROUTEUPDATERADIUSADD)

Description This parameter is used to set the radius increment when the location of the AT of QChat services is updated.


Related Commands MOD QCHATRURADIUS

LST QCHATRURADIUS



51


Default Value 0


Remarks For details, refer to the remarks of ROUTEUPDATERADIUSADD.

4.1.11 Route Update Radius Multiplier (ROUTEUPDATERADIUSMULTIPLY)

Description This parameter is used to set the radius decrease quotient when the location of the AT of Qchat services is updated.


Related Commands MOD QCHATRURADIUS

LST QCHATRURADIUS


Default Value 0.


Remarks For details, refer to the remarks of ROUTEUPDATERADIUSMULTIPLY.



52

4.2 Access Parameters 4.2.1 Access Cycle Duration (ACYCLEDURATION)

Description This parameter specifies the access period of the AT. The AT initiates a new access probe within the system time T (unit: timeslot) when the value of T mode AccessCycleDuration is 0.

Type Ordinary air interface parameter of the carrier level, specified in the Access Parameters message.

Related Commands MOD DOAPM

LST DOAPM

Value Range SLOT8 (8 timeslots), SLOT16 (16timeslots), SLOT32 (32 timeslots), SLOT64 (64 timeslots), or SLOT128 (128 timeslots).

Default Value SLOT64.

Setting Tradeoff When the value is smaller, the time of waiting for initiating a new access probe is shorter. When the value is greater, the waiting time is longer.

Remarks The following figure shows the access probe structure.



53

Figure 4-1 Access probe structure

When the value of this parameter is changed, the BECM of the BTS where the carrier is located must be reset so that the change can take effect. You are advised to separately change the value by running this command. Otherwise, all the ATs in this carrier are disconnected from the network. If the BTS uses the CSM6800 chip, the value cannot be SLOT8.

4.2.2 Preamble Length (PRBLEN)

Description This parameter specifies the length of the access probe preamble frame. The pilot (I-channel) is enabled first and functions as a preamble in each access probe. The probe data (Q-channel) is enabled after [PreambleLength] frames (namely, PreambleLength x 16 timeslots).



LST DOAPM

Value Range 1 to 7 (unit: 16 timeslots).

Default Value 2.



54

Setting Tradeoff If the value is greater, the success rate of the access probe detection of the AN is higher, but the time for a successful access probe is longer, and the capacity of the access channel is reduced. If the value is smaller, the AN may fail to detect the access probe.

Remarks The parameter is set according to the size of the access search window that is related to the coverage radius of the sector. The following figure shows the relationships between the value of the parameter and the size of the access search window.

Figure 4-2 Relationships between the value of PreambleLength and the size of the access search window

The following figure shows the structures of access channels. When the value of this parameter is changed, the BECM of the BTS where the carrier is located must be reset so that the change can take effect. You are advised to separately change the value by running this command. Otherwise, all the ATs in this carrier are disconnected from the network.



55

Figure 4-3 Structures of the EV-DO Rev. A and EV-DO Rel. 0 access channels

4.2.3 Capsule Length Max (CAPSULELENMAX)

Description This parameter specifies the maximum length of the probe data capsule carried by the access channel, namely, time of the message of each access probe of the AT. The sum of the values of the PreambleLength parameter and this parameter must be smaller than or equal to 8.



LST DOAPM



56


Default Value 2.

Setting Tradeoff If the value is smaller, the large data capsule of the access channel message cannot be carried, but the access probe time is shorter, and the capacity of the access channel is increased.

Remarks In the protocol, the value of this parameter ranges from 2 frames to 15 frames. The mask of the EV-DO access channel long code is related to ColorCode, AccessID, and the system time for access probe transmission. The system time is the first timeslot of the access probe preamble. When data packets are transmitted, the pilot is also transmitted. When the value of this parameter is changed, the BECM of the BTS where the carrier operates must be reset so that the change can take effect.

4.2.4 Open Loop Adjust (OLOOPADJUST)

Description This parameter specifies the adjusted power of the open loop power control, namely, difference between the uplink power and the downlink power in the open loop power control. The AT uses this parameter to estimate X0 (average open loop output power of the pilot channel) in the case of access probe. The value of this parameter should fluctuate within ±6 dB and must fluctuate within ±9 dB in the calculation results of the following formula:

X0 = Negative value of the average received power (unit: dBm) + Value of OpenLoopAdjust (AT open-loop power estimation) + Value of ProbeInitialAdjust (open-loop power estimation adjustment factor)

Type Ordinary air interface parameter of the carrier level, specified in the OpenLoopAdjust field of the AccessParameters message.


LST DOAPM

Value Range 0 to 255 (unit: –1 dB).

Default Value 74.



57

Setting Tradeoff If the value is smaller, the power of open-loop power estimation becomes higher, and the time for successful AT access becomes longer, but the reverse transmit power of AT becomes higher, and the reverse interference of system is higher. If the value is greater, the AT can access the system after multiple probes.

Remarks Factors affecting the value of OpenLoopAdjust:

Factors Affecting the Value of OpenLoopAdjust

Mark Value Remarks

BTS Transmit Power Ptx(bts) 10 W = 40 dBm

BTS Noise Figure (noise coefficient)

NF(bts) 5 dB

Cell Loading (sector reverse load)

Lc 50% Independent from link conditions

Desired Total RL SINR (–26 dB/antenna)

Ecp/Nt –26 dB/antenna

Ior/Ioc C1 1

No/Ior C2 1

Cell Thermal Noise NoW(bts) –113 dBm/Hz

OpenLoopAdjust k 83.2 –174 + 10 x log10 (1.23 MHz)

In the preceding table, k is the negative value of the calculation result of {Ecp/Nt + Ptx(ap) + NF(ap) + 10 x log10 (1 + c1 + c2) + NoW(ap) – 10 x log10 [1 – L(ap)]}

4.2.5 Probe Initial Adjust (PRBINIADJUST)

Description This parameter specifies the power adjustment factor of the open loop power control of the AT in the first access probe in an access sequence. This parameter is used with the OpenLoopAdjust parameter to estimate the average open-loop output power. For details, see the description of OLOOPADJUST.

Type Ordinary air interface parameter of the carrier level, specified in the ProbeInitialAdjust field of the Access Parameters message.



58


LST DOAPM

Value Range –16 to 15 (unit: dB).

Default Value 0.

Setting Tradeoff If this parameter is set to a great value, the reverse capacity is affected, thus leading to huge power redundancy. If this parameter is set to a small value, the AT can access the network after multiple access probes, and thus the access time of the AT becomes longer. Additionally, this may cause access failure.

Remarks The OpenLoopAjust and ProbeInitialAdjust parameters are the common data specified in the access channel MAC protocol. For a frequency band whose class is 0, 2, 3, 5, or 7, the values of the OpenLoopAjust and ProbeInitialAdjust parameters range from –81 dB to –66 dB. For a frequency band whose class is 1, 4, or 6, the values of the OpenLoopAjust and ProbeInitialAdjust parameters range from –100 dB to –69 dB.

4.2.6 Probe Num Step (PRBNUMSTEP)

Description This parameter specifies the maximum number of access probes in a single access probe sequence. The following figure shows the structure of the access probe sequence. In the figure, Np indicates the maximum number of access probes in a probe sequence, and Ns indicates the maximum number of probe sequences of an access attempt.

Figure 4-4 Access probe structure



59

Type Ordinary air interface parameter of the carrier level, specified in the ProbeNumStep field of the Access Parameters message.


LST DOAPM

Value Range 1 to 15 (unit: times).

Default Value 5.

Setting Tradeoff A greater value reduces the number of access attempt failures that are caused by the poor reverse link. If an access attempt failure is caused by collisions, the power of the succeeding access probe in an access probe sequence is high, and the interference on the reverse link may be higher. The access attempt failures caused by collisions are reduced.

Remarks The settings of PWRSTEP and PRBNUMSTEP are related. When PWRSTEP is set to a smaller value, PRBNUMSTEP should be set to a greater value. If PWRSTEP is set to a greater value, PRBNUMSTEP should be set to a smaller value.

4.2.7 Power Step (PWRSTEP)

Description This parameter specifies the increased power of an access probe in an access sequence, compared with the power of last access probe. The AT transmits the pilot channel of probe i in the probe sequence at the power of X0 + (i – 1) x PowerStep. In this expression, X0 indicates average open-loop output power of the AT pilot channel.

Type Ordinary air interface parameter of the carrier level, specified in the PowerStep field of the Access Parameters message.


LST DOAPM



60

Value Range 0 to 15 (unit: 0.5 dB).

Default Value 8.

Setting Tradeoff For details, see the description of PRBNUMSTEP.

Remarks None.

4.2.8 APERSISTENCE0/1/2/3(PERSISTENCE0/1/2/3)

Description This parameter specifies the value of APersistence used when the AT of type 0, 1, 2, or 3, or any AT performs the persistence detection (PD) before sending the first probe of a probe

sequence. The AT determines persistence probability 4ce[i]APersisten

2−

=p based on the value of APersistence.



LST DOAPM

Value Range Hexadecimal numeral containing a maximum of two digits. The maximum value is 0x3F indicating that the access is not allowed.

Default Value 0x0.

Setting Tradeoff A greater value reduces the PD pass ratio and prolongs the time for sending an access probe, but reduces the probability of access probe collisions. A smaller value is recommended in the earlier stage of network construction because the access load is low, thus shortening the access duration. When the network access load becomes higher, a greater value is recommended to reduce the number of access collisions and ensure the access success rate.



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Remarks The AT performs the PD before sending the first probe of the sequence. This process is as follows: Generate random number x (0 < x < 1) distributed equally, and compare it with persistence probability p. If the value of x is smaller than that of p, the PD is performed successfully. If the number of successful PDs or PD failures is more than 4/p, the AT sends the first probe of the sequence within the access channel period. Otherwise, the AT repeats the preceding PDs from the next access channel period when the value of p is not 0. If the value of p is 0, the AT cannot access the network.

4.2.9 Macro Diversity Access Switch (ACCMACRODIVSWITCH)

Description This parameter determines whether the access macro diversity switch is turned on.

Type Internal ordinary parameter of the BSC level.

Related Commands MOD DOHO

LST DOHO

Value Range ON, or OFF.

Default Value ON.

Setting Tradeoff The access macro diversity indicates that multiple legs are set up for enabling the AT to directly enter the SHO state when the connection is to be established. The access macro diversity facilitates increasing the access success rate.

Remarks None.

4.2.10 Enhanced Access Parameters Included (ENHACCPARAIND)

Description This parameter determines whether the enhanced access parameters are supported. The enhanced access parameters include the access probe preamble length, maximum rate of accessing the sector, probe timeout adjustment value, rated value of the pilot strength,



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minimum correction value of the pilot strength, and maximum correction value of the pilot strength.

Type Ordinary air interface parameter of the carrier level.


LST DOAPM

Value Range YES, or NO.

Default Value YES.


Remarks None.

4.2.11 Preamble Length Slots (PREAMBLELENSLOT)

Description This parameter specifies the access probe preamble length (unit: timeslot).



LST DOAPM

Value Range Slot4 (4 timeslots), or Slot16 (16 timeslots).

Default Value Slot4.



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Setting Tradeoff A greater value improves the AT access success rate and shortens the access duration, but increases the reverse power consumption of the AT and the reverse interference of the system, and reduces the reverse capacity of the system.

Remarks For the 1XEV-DO REV. A AT, this parameter has a higher priority over the PreambleLength parameter, that is, the AT uses the access probe preamble length defined by this parameter that is negotiated. Otherwise, the AT uses the access probe preamble length defined by the PreambleLength parameter. When the value of this parameter is changed, the BECM of the BTS where the carrier is located must be reset so that the change can take effect.

4.2.12 Probe TimeOut Adjust (PROBETIMEOUTADJUST)

Description This parameter specifies the timeout adjustment value of each access probe, used for calculating the time of transmitting the probe.



LST DOAPM

Value Range SLOT0 (0 timeslot), SLOT16 (16 timeslots), SLOT32 (32 timeslots), SLOT48 (48 timeslots), SLOT64 (64 timeslots), SLOT80 (80 timeslots), and SLOT92 (92 timeslots), or SLOT112 (112 timeslots).

Default Value SLOT0.


Remarks Probe backoff value minus the value of this parameter.



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4.2.13 Pilot Strength Nominal (PILOTSTRNOMINAL)

Description This parameter specifies the pilot strength reference value, which is used when the AT performs the open-loop power estimation. The AT determines the open-loop transmit power by comparing the actual pilot strength with the value of this parameter.

Type Ordinary air interface parameter of the carrier level, specified in the enhanced access channel MAC protocol.


LST DOAPM

Value Range DBN4 (–4 dB), DBN3 (–3 dB), DBN2 (–2 dB), DBN1 (–1 dB), DB0 (0 dB), DB1 (1 dB), DB2 (2 dB), or DB3 (3 dB)

(unit: dB).

Default Value DB0.

Setting Tradeoff The value of this parameter is related to the OpenLoopAdjust and ProbeInitialAdjust parameters. A greater value increases the access power and the reverse load of the sector. A smaller value prolongs the access duration in the case of interference in the sector.

Remarks The setting of the OpenLoopAdjust parameter prevents prolonging the access duration in the case of excessively lower initial power caused by high interference.



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4.2.14 Pilot Strength Correction Max (PILOTSTRCORTMAX)

Description This parameter specifies the maximum value corrected according to the pilot strength when the AT performs the open-loop power estimation.



LST DOAPM

Value Range DB0 (0 dB), DB1 (1 dB), DB2 (2 dB), DB3 (3 dB), DB4 (4 dB), or DB5 (5 dB).

Default Value DB0.

Setting Tradeoff If the parameter is set to a smaller value, the open-loop estimation power is insufficient when the pilot interference is high. In this case, the access delay becomes longer, and the access may fail.

Remarks For details, refer to the remarks of PILOTSTRNOMINAL.



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4.2.15 Pilot Strength Correction Min (PILOTSTRCORTMIN)

Description Minimum value corrected according to the pilot strength when the AT performs the open-loop power estimation.



LST DOAPM

Value Range DB0 (0 dB), DBN1 (–1 dB), DBN2 (–2 dB), DBN3 (–3 dB), DBN4 (–4 dB), or DBN5 (–5 dB)

(unit: dB).

Default Value DB0.

Setting Tradeoff A greater value increases the open-loop estimation power when the pilot interference is lower, and thus the reverse interference is increased.

Remarks For details, refer to the remarks of PILOTSTRNOMINAL.

4.2.16 Default Protocol Probe Sequence Max (PRBSEQMAX)

Description This parameter specifies the default maximum number of AT single access probe sequences. Figure 4-4 shows the structure of the access probe sequence. Np represents the maximum number of access probes in a probe sequence, and Ns represents the maximum number of probe sequences of an access attempt.

Type Globally configured negotiation parameter, defined in the InitialConfiguration Attribute of the Configuration Attributes of the default access channel MAC protocol.



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LST DOGCNPA

Value Range 1 to 15 (unit: times)

Default Value See Table 4-1.

Setting Tradeoff If the parameter is set to a very large value, the access success ratio increases but the access channel capacity decreases. If the parameter is set to a very small value (for example, 1), the sequence cannot be retransmitted. The radio environment fluctuates. If the first access fails, the radio environment may improve during the second access attempt. This parameter should be equal to or greater than 2.

Remarks None.

4.2.17 Default Protocol Probe Backoff (PRBBKOFF)

Description This parameter specifies the default backoff between AT access probe sequences. It is the τs, as shown in Figure 4-4. It is used to calculate the start time of the next access probe sequence.



LST DOGCNPA

Value Range 0 to 15 (unit: AccessCycleDuration).




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Remarks The AT generates a positive random integral y between 0 and ProbeBackoff. After the AT sends an access probe, it waits for a duration (τP = TACMPATProbeTimeout + (yTotal x AccessCycleDuration)) and then sends the next access probe. TACMPATProbeTimeout is the duration required by the AT to receive the ACK message before the detector sends the next probe.

4.2.18 Default Protocol Probe Sequence Backoff (PRBSEQBKOFF)

Description This parameter specifies the default backoff between AT access probe sequences. It is the τs, as shown in Figure 4-4. It is used to calculate the start time of the next access probe sequence.



LST DOGCNPA




Remarks An AT generates a positive random integral k between 0 and ProbeSequenceBackoff. After the AT sends a sequence, it waits for a duration (τS = (k *AccessCycleDuration) + TACMPATProbeTimeout) and then sends the next access probe sequence.

TACMPATProbeTimeout is the time needed by the AT to receive the ACK message before the detector sends the next probe.



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4.2.19 Default Protocol Access Channel Data Offset Nom (DATAOFFSETNOM)

Description This parameter specifies the default offset of access channel nominal power. It is used with the AT Open-Loop Power Estimation (OLOOPADJUST) to estimate the average open-loop output power.



LST DOGCNPA

Value Range -8 to 7 (unit: 0.5 dB).

Default Value 8 (odB). In the HCCT tool of v1.8 and earlier versions, the relation between the displayed value and the actual value is: Displayed value = Actual value/ 0.5 + 8.

Setting Tradeoff If the parameter is set to a very large value, the AT access success ratio increases and the access duration shortens, but the consumed AT reverse power increases and the reverse interference of the system increases. In such cases, the system reverse capacity decreases.

Remarks None.

4.2.20 Enhanced Protocol Probe Sequence Max (ENHPRBSEQMAX)

Description This parameter specifies the enhanced maximum number of AT single access probe sequences.

Type Globally configured negotiation parameter, defined in the InitialConfiguration Attribute of the Configuration Attributes of the enhanced access channel MAC protocol.



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LST DOGCNPA

Value Range 1 to 15 (unit: times).


Setting Tradeoff See Default Maximum Number of AT Single Access Probe Sequences (PRBSEQMAX).

Remarks See Default Maximum Number of AT Single Access Probe Sequences (PRBSEQMAX).

4.2.21 Enhanced Protocol Probe Backoff (ENHPRBBKOFF)

Description This parameter specifies the enhanced backoff between probes. It is used to calculate the start time of the next probe.



LST DOGCNPA



Setting Tradeoff See Default Backoff Between Probe Sequences (PRBSEQBKOFF).



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Remarks See Default Backoff Between Probe Sequences (PRBSEQBKOFF).

4.2.22 Enhanced Protocol Probe Sequence Backoff (ENHPRBSEQBKOFF)

Description This parameter specifies the enhanced backoff between AT access probe sequences. It is the τs, as shown in Figure 4-1. It is used to calculate the start time of the next access probe sequence.



LST DOGCNPA


Default Value See Table 4-1

Setting Tradeoff Default Backoff Between Probe Sequences (PRBSEQBKOFF)

Remarks Default Backoff Between Probe Sequences (PRBSEQBKOFF)

Table 4-1 Relation between personality and access parameters.

Attribute Personality0 Personality1 Personality2 Personality3

PRBSEQMAX 3 3 3 3

PRBBKOFF 4 4 4 4

PRBSEQBKOFF 8 8 8 8

ENHPRBSEQMAX 3 3 3 3

ENHPRBBKOFF 4 4 4 4

ENHPRBSEQBKOFF 8 8 8 8



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4.2.23 Maximum Cell Radius (MAXCELLR)

Description This parameter is used to set the search window size of the reverse common channel. It indicates the BTS allows the ATs to work properly within this cell radius. Geographically, the value of this parameter represents the longest distance covered by the BTS, that is, from the place where the BTS is located to the coverage boundary.

Type Ordinary BTS parameter.

Related Commands SET CBTSCDMADOSECTORPARA

Value Range 1 to 250 (unit: km).

Default Value 32.


Remarks None.



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5 Handoff Parameters

5.1 Intra-Frequency Pilot Set Management 5.1.1 Max. Active Set Branches (HOMAXBRANCHNUM)

Description This parameter specifies the maximum number of legs of an SHO target active set. According to the protocol, an active set of an AT can have a maximum of six legs. When the BSC determines the SHO, it restricts the number of legs of the SHO target active set based on the parameter.

Type Internal ordinary parameter of the BSC level


LST DOHO

Value Range 2 to 6 (unit: legs).

Default Value 3.

Setting Tradeoff If the parameter value is very large, the transmission performance of a single AT reverse link increases, but the number of users supported by the system reverse link decreases. If the parameter value is very small, the transmission performance of a single AT reverse link decreases, but the number of users supported by the system reverse link increases.



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Remarks None.

5.1.2 Different Active Set SHO Allowed (DIFFASSWITCH)

Description This parameter determines whether to initiate SHO if the active set of the AT is inconsistent with that of the AN.



LST DOHO

Value Range YES (allow), or NO (not allow).

Default Value YES.

Setting Tradeoff If SHO is not allowed because of inconsistent active sets, handoff may be delayed and it may result in call drops.

Remarks One of the following cases indicates that the active sets are inconsistent.

The reference pilot in the RouteUpgrade message does not belong to the current active set of the AN.

The pilot with the Keep identifier of drop in the RouteUpdate message does not belong to the current active set of the AN.

Some pilots in the current active set of the AN are not the pilots specified in the RouteUpdate message.

To initiate a handoff procedure, the following conditions must be met:

The switch to initiate sn SHO when active sets are inconsistent is ON. A handoff is not ongoing. The RouteUpdate does not trigger sn SHO normally.



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5.1.3 Same Channel Parameters Pilot Add (PILOTADD)

Description This parameter specifies the threshold for adding a pilot to a candidate set. An available pilot that does not belong to the active set nor to the candidate set and whose strength is greater than the threshold is added to the candidate set by the AT.

Type Um interface parameter of the carrier level, defined in the PilotAdd field of the SetManagementSameChannelParameters table when the route update protocol configures negotiation.


LST DOCNPA

Value Range –63 to 0 (unit: 0.5 dB).

Default Value –14 (–7 dB).

Setting Tradeoff If the value of this parameter is very large, the SHO threshold increases. In such cases, the SHO area decreases and the SHO ratio decreases, but SHOs may be delayed and coverage dead zone may appear. If the value of this parameter is very small, the SHO threshold decreases. In such cases, the SHO area increases, and the SHO ratio increases.

Remarks The AT reports the RouteUpdate message according to the following principles:

1. The strength of the pilot in the neighbor set is greater than PilotAdd. Additionally, no RouteUpdate message containing the preceding information (the strength of the pilot in the neighbor set is greater than PilotAdd) is reported after the latest ResetReport message is received.

2. The difference between the strength of the pilot in the candidate set and the strength of the pilot in the active set is greater than PilotCompare. Additionally, no RouteUpdate message containing the preceding information (the difference between the strength of the pilot in the candidate set and the strength of the pilot in the active set is greater than PilotCompare) is reported after the latest ResetReport message is received.

3. 4. The strength of the pilot in the active set ranges from PilotDropTimer to PilotDrop.

Additionally, no RouteUpdate message containing the preceding information (the strength of the pilot in the active set ranges from PilotDropTimer to PilotDrop) is reported after the latest ResetReport message is received.



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A RouteUpdate message is reported only when any of the preceding principles is satisfied. Generally, the ResetReport message referred in the principles is issued only when the active set changes.

5.1.4 Same Channel Parameters Pilot Compare (PILOTCMP)

Description This parameter specifies the threshold of the difference between the strength of a pilot in an active set and the strength of a pilot in a candidate set. When the strength of a pilot in a candidate set is higher than that in an activate set, the AT sends the RouteUpdate message.

Type Um interface parameter of the carrier level, defined in the PilotCompare field of the SetManagementSameChannelParameters table when the route update protocol configures negotiation.


LST DOCNPA

Value Range –32 to 31 (unit: 0.5 dB)

Default Value 5, that is, 2.5 dB.

Setting Tradeoff If the value of this parameter is very small, the AT frequently sends the RouteUpdate message, resulting in frequent SHOs. If the value of this parameter is very large, the AT fails to report the RouteUpdate message in time, resulting in delayed handoffs.

Remarks For details, refer to the remarks of PILOTADD.

5.1.5 Same Channel Parameters Pilot Drop (PILOTDROP)

Description This parameter specifies the threshold of the smallest pilot strength at which the drop timer is started. When the strength of a pilot in an active set or a candidate set is smaller than the threshold, the AT starts a pilot drop timer. If the pilot strength is greater than the PilotDrop value before the timer expires, the timer is restarted.



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Type Um interface parameter of the carrier level, defined in the PilotDrop field of the SetManagementSameChannelParameters table when the route update protocol configures negotiation.


LST DOCNPA



Setting Tradeoff If the value of this parameter is very large, available pilots are removed from the active set and they may become reverse interference signals among the signals in the active set. If the value of this parameter is very small, SHO threshold is lower, and a pilot in an active set is difficult to be removed from the active set. Thus, the SHO ratio increases.

Remarks For details, refer to the remarks of PILOTADD.

5.1.6 Same Channel Parameters Pilot Drop Timer (PILOTDROPTIMER)

Description This parameter specifies the duration of the intra-frequency pilot drop timer. When the strength of the pilots in the active set or candidate set is smaller than the [Pilot Drop Threshold (PILOTDROP)], the AT enables the pilot drop timer according to the value of this parameter. When the pilot drop timer for a pilot in the active set expires, the AT sends the RouteUpdate message. When the timer for a pilot in the candidate set expires, the AT moves the pilot to a neighbor set.

Type Um interface parameter of the carrier level, defined in the PilotDropTimer field of the SetManagementSameChannelParameters table when the route update protocol configures negotiation. Table 5-1 shows the timer coding mode.



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Table 5-1 PilotDropTimer

PilotDropTimer Timer Expiration (Second)

PilotDropTimer Timer Expiration (Second)

0 < 0.1 8 27

1 1 9 39

2 2 10 55

3 4 11 79

4 6 12 112

5 9 13 159

6 13 14 225

7 19 15 319


LST DOCNPA

Value Range S0 (0.1 second) to S15(319 seconds) (unit: second)

Default Value S3 (4 seconds)

Setting Tradeoff If the value of this parameter is very large, the pilot with a small strength in the active set resides for a long time. In this way, the SHO ratio increases and some forward traffic channels are wasted. If the value of this parameter is very small, when the strength of a pilot in the active set fluctuates normally and the strength becomes smaller temporarily, the pilot may be removed from the active set. In this way, the parameter cannot play the function of handoff hysteresis. Hence, handoffs frequently occur.

Remarks When [Dynamic Threshold Included] is set to YES, the comparison between pilot strength and [Pilot Drop Threshold] is one of the conditions to enable and disable the pilot drop timer. For details, see [Soft Handoff Pilot Drop Intercept].



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5.1.7 Same Channel Parameters Dynamic Thresholds (DYNAMICTRESHINC)

Description This parameter determines whether to use dynamic SHO thresholds. The dynamic thresholds for pilot set management can be adjusted dynamically according to the algorithm.

Type Parameter of the carrier level, defined in the DynamicThresholds field of the SetManagementSameChannelParameters table when the route update protocol configures negotiation.


LST DOCNPA

Value Range YES (use), or NO (not use).

Default Value NO (not use).

Setting Tradeoff When the dynamic SHO switch is enabled, the SHO ratio may decrease and reverse capacity increases, but handoffs is not carried out timely and the call drop rate may increase.

Remarks None.

5.1.8 Same Channel Parameters Soft Slope (SOFTSLOPE)

Description This parameter specifies the increment slope of the dynamic SHO. When the dynamic SHO is enabled, this slope is used for adding or removing legs. If [Whether to Use Dynamic Thresholds for Intra-Frequency Pilots (DYNAMICTRESHINC)] is set to NO (not use), this parameter is invalid.

Type Um interface parameter of the carrier level, defined in the SoftSlope field of the SetManagementSameChannelParameters table when the route update protocol configures negotiation.



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LST DOCNPA


Default Value 18.

Setting Tradeoff If the strength of the pilots in the active set does not change, the smaller the value of this parameter is, the higher the dynamic adding threshold and dynamic removing threshold will be. In such cases, adding a pilot to the active set is more difficult but removing a pilot from the active set is easier. Thus, the SHO ratio decreases, however, the SHO gains cannot be fully used. The larger the value of this parameter is, the lower the dynamic adding threshold and dynamic removing threshold will be. In such cases, the SHO ratio increases.

Remarks If the dynamic SHO is enabled, and the pilot strength (PS) of the neighbor set or the remaining set satisfies the following inequation, the AT sends the RouteUpdate message.

Where, ∑ is the sum of the strength of all the pilots in the current active set. When the dynamic SHO is enabled and the PS of the candidate set satisfies the following inequation, the AT sends the RouteUpdate message.

5.1.9 Same Channel Parameters Add Intercept (ADDINTERCEPT)

Description This parameter specifies the pilot adding intercept in SHO. This parameter specifies the pilot adding intercept during the dynamic SHO. It is valid only when Whether to Use Dynamic Thresholds for Intra-Frequency Pilots (DYNAMICTRESHINC) is set to YES.



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Type Um interface parameter of the carrier level, defined in the AddIntercept field of the SetManagementSameChannelParameters table when the route update protocol configures negotiation.


LST DOCNPA


Default Value 6 (6 dB).

Setting Tradeoff The smaller the value of this parameter is, the lower the dynamic adding threshold will be, and the easier it will be to add neighbor pilots to the active set. In such cases, SHO ratio increases. The larger the value of this parameter is, the higher the dynamic adding threshold will be, and the harder it will be to add neighboring pilots to the active set. In such cases, the SHO ratio decreases, and the SHO gains cannot be fully used. In such cases, the reverse performance may increase.

Remarks For detatils, refer to the remarks of SOFTSLOPE.

5.1.10 Same Channel Parameters Drop Intercept (DROPINTERCEPT)

Description This parameter specifies the pilot drop intercept during the dynamic SHO. It is valid only when Whether to Use Dynamic Thresholds for Intra-Frequency Pilots (DYNAMICTRESHINC is set to YES.

Type Um interface parameter of the carrier level, defined in the DropIntercept field of the SetManagementSameChannelParameters table when the route update protocol configures negotiation.


LST DOCNPA



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Setting Tradeoff The smaller the value of this parameter is, the lower the dynamic SHO threshold will be. In such cases, the SHO ratio increases. The larger the value of this parameter is, the higher the dynamic threshold will be. In such cases, the SHO ratio decreases, and the SHO gains cannot be fully used.

Remarks If DynamicThresholds is set to YES, the AT performs the following operations:

According to the strengths of pilots, the AT arranges the pilots in the active set in an ascending order, that is, PS1< PS2<PS3<......< PSNa. Na represents the number of pilots in the active set. When the strength of PSi satisfies the following inequation, the AT starts the timer.

If the strength of PSi does not satisfy this inequation, the AT restarts and disables the timer before the PilotDropTimer timer expires.

5.1.11 Same Channel Parameters Neighbor Max Age (NBRMAXAGE)

Description This parameter specifies the maximum lifetime of the intra-frequency pilots in the neighbor set. The AT has a counter for each pilot in the neighbor set. When the AT receives a Neighbor List Update Message (NLUM), the AT increases the counters of the original pilots in the neighbor set by 1. If the counter value exceeds this parameter value, the AT removes this pilot from the neighbor set. If the parameter value is set to 0, each time the AT receives an NLUM, the AT removes all pilots in the original neighbor set so that the AT uses the contents in the latest NLUM. If the value is set to 2, when a pilot that is moved from the active set or candidate set to the neighbor set is not in two successive NLUMs, this pilot is removed from the neighbor set.



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Type Um interface parameter of the carrier level, defined in the NeighborMaxAge field of the SetManagementSameChannelParameters table when route update protocol configures negotiation.


LST DOCNPA


Default Value 0.

Setting Tradeoff If this parameter is set to a great value, a pilot excluded from the active set or candidate set can stay a longer time in the neighbor set, so it is possible that new neighboring pilots in the NLUM will be excluded from the neighbor set of the AT (when the number of pilots exceeds the maximum of pilots in the neighbor set of the AT). If this parameter is set to 0, each time the AT receives the NLUM, the AT takes the neighbor pilot list in the NLUM for a new pilot neighbor set. If there are many neighboring cells, set the parameter to 0. This ensures that the AT always uses the neighboring pilot contents of the latest NLUM delivered by the BSC.

Remarks The AT keeps a counter (AGE) for each pilot in neighbor set, and proceeds as follows:

Add the pilot deleted from active set but not added to candidate set and the AGE is set to 0.

For the pilot deleted from candidate set but not added to active set, the AGE is set to 0.

If the neighbor set size exceeds the maximum neighboring cell number supported by the AT, the AT removes enough pilots based on descending sequence of AGE so that neighbor set size is equal to maximum number of neighbor list supported by the AT.

If the AT receives some common overhead message including neighboring cell list, or NeighborList message:

1. The AT should add AGE of each pilot in neighbor set once. 2. For the pilots in neighbor set receiving neighbor list, the AT sets AGEs of the pilots to

minimum value of the current AGE plus NeighborMaxAge. 3. For the pilots in candidate set receiving neighbor list:

If the neighbor set size does not exceed the maximum number of neighbor set supported by the AT after the neighbor list pilot is added to neighbor set, the AT adds the pilot to neighbor set and sets its AGE to NeighborMaxAge.

If the neighbor set size exceeds the maximum number of neighbor set supported by the AT after the neighbor list pilot is added to neighbor set, and neighbor set includes at least one pilot whose AGE exceeds NeighborMaxAge, the AT deletes the pilot with the



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largest AGE- NeighborMaxAge difference of the neighbor set, and adds neighbor list pilot to neighbor set and set its AGE to NeighborMaxAge. If the neighbor set includes at least one pilot whose AGE exceeds NeighborMaxAge, the AT deletes the pilot with the largest AGE- NeighborMaxAge difference of the neighbor set, and adds neighbor list pilot to neighbor set and set its AGE to NeighborMaxAge.

If the neighbor set size exceeds the maximum number of neighbor set supported by the AT after neighbor list pilot is added to neighbor set, and neighbor set has no one pilot whose AGE exceeds NeighborMaxAge, the AT does not add neighbor pilot in active set to neighbor set. If no AGE in the neighbor set exceeds NeighborMaxAge, the AT does not add this neighbor list active set to the neighbor set.

5.1.12 Acquisition Search Window Size (ACQUISITIONWSZ)

Description This parameter specifies the search window size of the reverse access channel. Each access channel has one search window on the BTS. Only when reverse signals fall into the search window, the BTS can capture and demodulate the signals.



DSP CBTSCFG

Value Range 8 to 255 (unit: chip).

Default Value 64.

Setting Tradeoff The larger the search window is set, the easier it is for the signal to fall into the search window. But the search time is relatively longer. The smaller the search window is set, the harder it is for the signal to fall beyond the search window. But the search time is short.

Remarks None.



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5.1.13 Data Search Window Size (DATAWSZ)

Description This parameter specifies the search window size of the reverse traffic channel. Each traffic channel has one search window on the BTS. Only when reverse signals fall into the search window, the BTS can capture and demodulate the signals.



DSP CBTSCFG


Default Value 64.

Setting Tradeoff The larger the search window is set, the easier it is for the signal to the search window. But the search time is relatively longer. The smaller the search window is set, the harder it is for the signal to fall beyond the search window. But the search time is short.

Remarks None.

5.2 Inter-Frequency Pilot Set Management The principles of the EV-DO Rev. A inter-frequency pilot set management are as follows:

When an AT is in the connected state, the AT starts searching inter-frequencies when the following two conditions are met:

The strength of the strongest pilot among the active set and the candidate set is less than –5dB.

Certain pilots in the candidate set or the neighbor set work on inter-frequencies.

Inter-frequency search takes at least 100 ms, during which services are interrupted. After the search is complete, the AT determines whether to report the RouteUpdate message based on similar rules as defined in the intra-frequency SHO. Therefore, the description of certain parameters for inter-frequency pilot management is almost the same as that of intra-frequency pilot management.



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5.2.1 Different Channel Parameters Pilot Add (DIFFCHPILOTADD)

Description This parameter specifies the threshold for adding a pilot to a candidate set. An available pilot that does not belong to the active set nor the candidate set and whose strength is greater than the threshold is added to the candidate set by the AT.

Type Um interface parameter of the carrier level, defined in the PilotAdd field of the SetManagementDifferentChannelParameters table when the route update protocol configures negotiation.


LST DOCNPA



Setting Tradeoff The smaller the threshold is set, the easier it is for the AT to add the pilots to the candidate set. In this case, the CFSRQM report is increasingly frequent. Certain reports may be of less value. This may cause unnecessary signaling load. The greater the threshold is set, the harder the AT adds the pilots to the candidate set. The signaling load is decreased but the handoff may not be implemented.

Remarks Set the threshold to a relatively greater value to let the AT add more pilots to the candidate set. Therefore, the BSC can have more choices when making decisions.

5.2.2 Different Channel Parameters Pilot Compare (DIFFCHPILOTCMP)

Description This parameter specifies the threshold of the difference between the strength of a pilot in an active set and the strength of a pilot in a candidate set. When the strength of a pilot in a candidate set is higher than that of a pilot in an activate set, the AT sends the RouteUpdate message.



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Type Um interface parameter of the carrier level, defined in the PilotCompare field of the SetManagementDifferentChannelParameters table when the route update protocol configures negotiation.


LST DOCNPA


Default Value 5 (that is, 2.5 dB).

Setting Tradeoff If the value of this parameter is very small, the AT frequently sends the RouteUpdate message, resulting in frequent SHOs. If the value of this parameter is very large, the AT fails to report the RouteUpdate message in time, resulting in delayed handoffs.

Remarks None.

5.2.3 Different Channel Parameters Pilot Drop (DIFFCHPILOTDROP)

Description This parameter specifies the threshold of the smallest inter-frequency pilot strength at which the drop timer is started. When the strength of a pilot (inter-frequency) in the active set or in the candidate set is smaller than this parameter value, the AT starts a pilot drop timer. If the pilot strength is greater than the PilotDrop value before the timer expires, the timer is restarted.

Type Um interface parameter of the carrier level, defined in the PilotDrop field of the SetManagementDifferentChannelParameters table when the route update protocol configures negotiation.


LST DOCNPA



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Default Value –18.

Setting Tradeoff If the value of this parameter is very large, an available pilot can be easily removed from the active set. If the value of this parameter is very small, handoff threshold decreases and a pilot in the active set is difficult to be removed from active set.

Remarks None.

5.2.4 Different Channel Parameters Pilot Drop Timer (DIFFCHPILOTDROPTIMER)

Description This parameter specifies the duration of the inter-frequency pilot drop timer. When the strength of the pilots (inter-frequency) in the candidate set of the AT is smaller than the [Inter-Frequency Pilot Available Threshold (DIFFCHPILOTADD)], the AT enables the pilot drop timer according to the value of this parameter. After the timer expires, the AT moves the inter-frequency pilot to the neighbor set.

Type Um interface parameter of the carrier level, defined in the PilotDropTimer field of the SetManagementDifferentChannelParameters table when the route update protocol configures negotiation. Table 5-2 lists the timer coding mode.

Table 5-2 PilotDropTimer

PilotDropTimer

Timer Expiration (Second)

PilotDropTimer

Timer Expiration (Second)

0 < 0.1 8 27

1 1 9 39

2 2 10 55

3 4 11 79

s4 6 12 112

5 9 13 159

6 13 14 225



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7 19 15 319


LST DOCNPA

Value Range S0 (0.1 second) to S15(319 seconds) (unit: second).

Default Value S3(4SECONDS).

Setting Tradeoff If the value of this parameter is very large, the AT fails to remove the inter-frequency pilot with weak strength from the candidate set in time. If the value of this parameter is very small, the AT removes available inter-frequency pilot to the neighbor set.

Remarks When [Dynamic Threshold Included] is set to YES, the comparison between pilot strength and [Pilot Drop Threshold] is one of the conditions to enable and disable the pilot drop timer. For details, see [Soft Handoff Pilot Drop Intercept].

5.2.5 Different Channel Parameters Dynamic Thresholds (DIFFCHDYNAMICTRESHINC)

Description This parameter determines whether to use dynamic threshold for inter-frequency pilots.

Type Parameter of the carrier level, defined in the DynamicThresholds field of the SetManagementDifferentChannelParameters table when the route update protocol configures negotiation.


LST DOCNPA

Value Range YES (to use), or NO (not to use).



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Default Value NO.

Setting Tradeoff When the switch for dynamic threshold is enabled, the SHO ratio may decrease and reverse capacity increases, but handoffs may be caused and call drop rate may increase.

Remarks None.

5.2.6 Different Channel Parameters Soft Slope (DIFFCHSOFTSLOPE)

Description This parameter specifies the slope of the dynamic SHO threshold. When the dynamic SHO is enabled, adding or removing legs uses this slope. If [Whether to Use Dynamic Thresholds for Intra-Frequency Pilots (DYNAMICTRESHINC)] is set to NO (not use), this parameter is invalid.

Type Um interface parameter of the carrier level, defined in the SoftSlope field of SetManagementDifferentChannelParameters table when route update protocol configures negotiation.


LST DOCNPA


Default Value 18.

Setting Tradeoff See [Soft Handoff Pilot Adding Intercept (AddIntercept)]. Dynamic SHO is required, under a good radio environment, to reduce unnecessary SHOs without affecting the system.

Remarks If the dynamic SHO is enabled, and the pilot strength (PS) of the neighbor set or the remaining set satisfies the following inequation:



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where, ∑ is the sum of all PSs in the active set. Then the AT sends the RouteUpdate message. If the dynamic threshold is enabled, and the PS of the candidate set satisfies the following inequation:

Then the AT sends the RouteUpdate message.

5.2.7 Different Channel Parameters Add Intercept (DIFFCHADDINTERCEPT)

Description This parameter specifies the inter-frequency pilot adding intercept in inter-frequency dynamic SHO. This parameter is valid only when [Whether to Use Dynamic Thresholds for Inter-Frequency Pilots] is set to 1.

Type Um interface parameter of the carrier level, defined in the AddIntercept field of the SetManagementDifferentChannelParameters table when the route update protocol configures negotiation.


LST DOCNPA



Setting Tradeoff The smaller the value of this parameter is, the lower the dynamic adding threshold will be, and the easier it will be to add neighbor pilots to the active set. In such cases, SHO ratio increases. The larger the value of this parameter is, the higher the dynamic adding threshold will be, and the harder it will be to add neighboring pilots to the active set. In such cases, the SHO ratio decreases, and the SHO gains cannot be fully used. In such cases, the reverse performance may increase.



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Remarks For details, refer to the remarks of SOFTSLOPE.

5.2.8 Different Channel Parameters Drop Intercept (DIFFCHDROPINTERCEPT)

Description This parameter specifies the inter-frequency pilot drop intercept in inter-frequency dynamic SHO. This parameter specifies the pilot drop intercept during the dynamic SHO. It is valid only when [Whether to Use Dynamic Thresholds for Inter-Frequency Pilots] is set to 1.

Type Um interface parameter of the carrier level, defined in the DropIntercept field of the SetManagementDifferentChannelParameters table when the route update protocol configures negotiation.


LST DOCNPA



Setting Tradeoff The smaller the value of this parameter is, the lower the dynamic SHO threshold will be. In such cases, the SHO ratio increases. The larger the value of this parameter is, the higher the dynamic threshold will be. In such cases, the SHO ratio decreases, and the SHO gains cannot be fully used.

Remarks If DynamicThresholds is set to 1, the AT performs the following operations:

The AT starts a pilot drop timer for each pilot whose strength is smaller than PilotDrop and the pilot drop timer expires after the duration of the PilotDropTimer. If pilot strength is greater than PilotDrop before the timer expires, the timer restarts and is disabled.

The AT arranges the pilots in the active set in an ascending order according to their strengths, that is, PS1< PS2<PS3<......< PSNa. Na is the number of pilots in the active set. When the strength of PSi satisfies the following inequation, the AT starts the timer.



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If the strength does not satisfy this inequation, the AT restarts and disables the timer.

5.2.9 Different Channel Parameters Neighbor Max Age (DIFFCHNBRMAXAGE)

Description This parameter specifies the maximum lifetime of the inter-frequency pilots in the neighbor set. The AT has a counter for each pilot in the neighbor set. When the AT receives a Neighbor List Update Message (NLUM), the AT increases the counters of the original pilots in the neighbor set by 1. If the counter value exceeds this parameter value, the AT removes this pilot from the neighbor set. If the parameter value is set to 0, each time the AT receives an NLUM, the AT removes all pilots in the original neighbor set so that the AT uses the contents in the latest NLUM. If the value is set to 2, when a pilot that is moved from the active set or candidate set to the neighbor set is not in two successive NLUMs, this pilot is removed from the neighbor set.

Type Air interface parameter of the carrier level, specified in the NeighborMaxAge field of the SetManagementDifferentChannelParameters feature table during the negotiation of route update protocol.


LST DOCNPA


Default Value 0.

Setting Tradeoff If this parameter is set to a great value, a pilot that is excluded from the active set or candidate set can stay for a longer time in the neighbor set. Hence new neighbor pilots in the NLUM may be excluded from the neighbor set of the AT (when the number of pilots exceeds the maximum number of pilots in the neighbor set of the AT). If this parameter is set to 0, each time the AT receives the NLUM, the AT takes the neighbor pilot list in the NLUM for a new pilot neighbor set. If there are many neighboring cells, set the parameter to 0. This ensures that AT always uses the neighbor pilot contents of the latest NLUM delivered by the BSC.



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Remarks AT keeps a counter (AGE) for each pilot in neighbor set, and proceeds as follows:

1. The pilot deleted from active set but not added to candidate set is added to the neighbor set and the AGE is set to 0.

2. For the pilot deleted from candidate set but not added to active set, the AGE is set to 0. 3. If the neighbor set size exceeds the maximum neighboring cell number supported by AT,

the AT removes enough pilots based on descending sequence of AGE so that neighbor set size is equal to maximum number of neighbor list supported by AT.

4. If AT receives some common overhead message including neighboring cell list, or NeighborList message: A. AT should add AGE of each pilot in neighbor set once. B. For the pilots in neighbor set receiving neighbor list, AT sets AGEs of the pilots to

minimum value of the current AGE plus NeighborMaxAge. C. For the pilots in candidate set receiving neighbor list: − If the neighbor set size does not exceed the maximum number of neighbor set

supported by AT after the neighbor list pilot is added to neighbor set, AT adds the pilot to neighbor set and sets its AGE to NeighborMaxAge.

− If neighbor set size exceeds the maximum number of neighbor set supported by AT after the neighbor list pilot is added to neighbor set, and neighbor set includes at least one pilot whose AGE exceeds NeighborMaxAge, AT deletes the pilot with the largest AGE- NeighborMaxAge difference of the neighbor set, and adds neighbor list pilot to neighbor set and set its AGE to NeighborMaxAge. If the neighbor set includes at least one pilot whose AGE exceeds NeighborMaxAge, AT deletes the pilot with the largest AGE- NeighborMaxAge difference of the neighbor set, and adds neighbor list pilot to neighbor set and set its AGE to NeighborMaxAge.

− If neighbor set size exceeds the maximum number of neighbor set supported by AT after neighbor list pilot is added to neighbor set, and neighbor set has no one pilot whose AGE exceeds NeighborMaxAge, AT does not add neighbor pilot in active set to neighbor set. If no AGE in the neighbor set exceeds NeighborMaxAge, the AT does not add this neighbor list active set to the neighbor set.

5.3 Pilot Searching Management To change the carrier neighbor relation idle handoff parameter, use the MOD NBRPARA command.

To change the setting of the service handoff parameter, use the MOD DONBRPARA command.

5.3.1 Pilot Increment (PILOTINCREMENT)

Description This parameter specifies the increment of the PN sequence offset index. The value of this parameter is the greatest common divisor of the pilot PN sequence offsets of neighboring BTSs.

If the PLTINC is specified, the number of available pilot PNs in the system is 512/PLTINC. If the value of this parameter is small, many pilot phase offsets are available, and the intra-phase



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inter-pilot multiplexing distance is long. This can lower the interference between multiplexing pilots at the same phase. The phase interval between pilots, however, is reduced, and pilot disorder, therefore, may be incurred. If the value is great, the numbers of available pilot phase offsets and remaining centralized pilots are small, and an AT has less time to scan for pilots. In an actual dynamic environment, the probability of losing a strong pilot is smaller. On the other hand, the number of available pilot phase offsets is smaller, the intra-phase inter-pilot multiplexing distance is shorter, and the intra-phase inter-pilot interface is stronger. In addition, the parameter determines the maximum value of SRCH_WIN_N and SRCH_WIN_R.

Type Air interface parameter of the carrier level, specified in the PilotIncrement filed of the SearchParameters feature table during the negotiation of default route update protocol.


LST DOCNPA

Value Range 0 to 15 (unit: 64 PN chips).

Default Value 4 (that is, 256 chips).

Setting Tradeoff The recommended value range is 2 to 6. In densely-populated urban areas, the value of this parameter can be small. In wide coverage areas, the value of this parameter can be great. For example, the BTSs in a site are densely distributed, that is, the distances between BTSs are small. PILOT_INC is set to 2 for this site. With precisely planned PNs, the probability of PN disorder can be minimized.

Remarks None.

5.3.2 Search Window Active (SRCHWINA)

Description This parameter specifies the search window size used when the AT searches for the pilots of the active set and the candidate set. When searching for pilots in the active and candidate sets, the AT uses the available multi-path that arrives first as the search centers. Therefore, this parameter is only related to the multi-paths of pilots, instead of the relative propagation delay between pilots.



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Type Air interface parameter of the carrier level. Specified in the SearchWindowActive field of the SearchParameters feature table during the negotiation of route update protocol.


LST DOCNPA


The following figure shows the relation between values and the window size.

Table 5-3 SearchWindowSize codes

SearchWindowSize Value Search Window Size (PN Chip)

0 4

1 6

2 8

3 10

4 14

5 20

6 28

7 40

8 60

9 80

10 100

11 130

12 160

13 226

14 320

15 452




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Setting Tradeoff According to the local propagation delay, the pilot signals after the propagation delay should fall into the search window of the active set. If this parameter is set to a small value, some useful signals in the active set may fall beyond the search window to seriously affect the link quality. If this parameter is set to a great value, some irrelevant signals (PN confusion) may also fall into the search window, so the link quality may also be affected. A large search window also slows down the AT's search for neighbor pilots. As a result, the handoff could not be triggered in time. Thus the system performance decreases.

Remarks None.

5.3.3 Search Window Neighbor (SRCHWINN)

Description This parameter specifies the size of the search window in the neighbor set. This parameter is related to the multipaths of neighbor pilots and relative propagation delay from neighbor pilot to the reference pilot.

Type Air interface parameter of the carrier level, specified in the SearchWindowNeighbor field of the SearchParameters feature table during the negotiation of route update protocol.


LST DOCNPA


For the relation between this parameter and the size of the search window, see Table 5-3.


Setting Tradeoff If this parameter is set to a great value, the time for searching pilots is prolonged. If the value is small, some pilot legs may be missed.

Remarks The following figure shows the process of the AT searching for a pilot. The following figure shows the conditions when AT searches for pilots. AT searches for pilots in active set and sets available multipath arriving earliest of active set pilot as a center. When AT searches for neighbor set pilots, set the reference pilot as time reference and PN offset of neighbor pilot as



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search center (if set search window offset of neighbor set, search window still adds PN offset to search window offset of neighbor set). Generally, search window of the neighbor set should be larger than that of the active set.

Figure 5-1 Searching a pilot

5.3.4 Search Window Remaining (SRCHWINR)

Description This parameter specifies the size of the search window in the remaining pilot set.

Type Air interface parameter of the carrier level, specified in the SearchWindowRemaining field of the SearchParameters feature table during the negotiation of route update protocol.


LST DOCNPA


For the relation between this parameter and the size of the search window, see Table 5-3.


Setting Tradeoff If this parameter is set to a small value, some useful pilots in the remaining set may be missed. As a result, the function of BSC detecting the absent configuration of neighboring cell can not be utilized fully. If this parameter is set to a great value, the AT may search other irrelevant signals, and the time that the AT searches pilots in the remaining set increases, so the search speed of the AT slows down.



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Remarks This parameter is used when the function of detecting the missing neighboring cells is required to check whether any missing neighboring cells exist in the system. During the pilot search in the remaining set, the AT searches for only the PNs that are integral multiples of PILOT_INC. The search window in the remaining set can be set to 0 if the neighboring cells are properly optimized.

5.3.5 Search Window Size Contain Flag (SRCHWININC)

Description This parameter determines whether the sector parameter message contains the information about the size of the neighbor set search window. If the message contains the information, use the value of SRCHWIN. If the message does not contain the information, use the negotiated parameter.

Type Ordinary air interface parameter of the carrier level, specified in the NeighborSearchWindowSizeIncluded field in the SectorParameter message.

Related Commands MOD NBRPARA

LST NBRPARA

Value Range YES (included), NO (not included).

Default Value NO.


Remarks None.

5.3.6 Search Window Size (SRCHWIN)

Description This parameter specifies the size of the search window for the neighbor set used by ATs in the idle state. If NSRCHWININC is set to NO (not included), this parameter does not take effective.



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Type Ordinary air interface parameter of the carrier level, specified in the NeighborSearchWindowSize field in the SectorParameter message.


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 According to the multipath of neighbor pilot and the propagation delay size from neighbor pilot to reference pilot, set the parameter to ensure that neighbor pilot signals are located within the neighbor set search window that sets the earliest arriving multi-path of reference pilot as time reference and PN offset of neighbor pilot as the search center. If this parameter is set to a small value, neighbor pilot signals may be located beyond the search window to miss some neighbor pilots so that neighbor set pilots cannot be added to active set and normal SHO fails. If this parameter is set to a great value, the time for AT to search for each neighboring pilot may increase to slow down the speed for searching neighbor pilot and miss the best SHO opportunity. In this way, the handoff performance of the system is potentially affected.

Remarks For the pilots in active set, AT can set the search window center close to the earliest arriving available multipath components. For each pilot in neighbor set, by using the timing defined by AT reference baseband, AT can set the search window close to the search window offset specified by the result of pilot PN sequence plus NeighborSearchWindowOffset. The concept of the search window for 1X is similar.

5.3.7 Search Window Offset Contain Flag (SRCHOFFSINC)

Description This parameter determines whether the sector parameter message contains the information about the offset of the neighbor set pilot search window.

If the message contains the information, use the value of NSRCHWINOFFSET to search the offset. If the message does not contain the information, use the default neighbor set branch to search the offset.



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Type Ordinary air interface parameter of the carrier level, specified in the NeighborSearchWindowOffsetIncluded field in the SectorParameter message.


LST NBRPARA


Default Value NO.


Remarks None.

5.3.8 Search Window Offset (SRCHOFFS)

Description This parameter specifies the offset of the pilot search window for the neighbor set used by ATs in the idle state.

Type Ordinary air interface parameter of the carrier level, specified in the NeighborSearchWindowOffset field in the SectorParameter message.


LST NBRPARA

Value Range 0 to 6.

The maintenance console provides a list containing all offset values.

For the relation between the values for the air interface and the offset of the search window, see Table 5-4.



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Table 5-4 Search window offset coding

Default Value 0


Remarks This parameter together with NSRCHWINSIZE determines the position of the search window.

5.3.9 Neighbor Search Window Size Included (NSRCHWININC)

Description This parameter determines whether the NeighborList message contains the information about the size of the search window. If the message contains the information, use the value of SRCHWIN. If the message does not contain the information, use the negotiated parameter.

Type Ordinary air interface parameter of the carrier level, specified in the SearchWindowSizeIncluded field in the NeighborList message.

Related Commands MOD DONBRPARA

LST DONBRPARA


Default Value NO.



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Remarks None.

5.3.10 Neighbor Search Window Size (NSRCHWINSIZE)

Description This parameter specifies the size of the search window in the neighbor set used by ATs in the service state. This parameter does not take effect if SearchWindowSizeIncluded is set to 0; this parameter indicates the size of the search window used by a neighbor pilot if SearchWindowSizeIncluded is set to 1.

Type Ordinary air interface parameter of the carrier level, specified in the SearchWindowSize field in the NeighborList message. When the filed occurs for n times, correspondingly, PilotPN occurs for n times.


LST DONBRPARA

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 According to the multipath of neighbor pilot and the propagation delay size from neighbor pilot to reference pilot, set the parameter to ensure that neighbor pilot signals are located within the neighbor set search window that sets the earliest arriving multi-path of reference pilot as time reference and PN offset of neighbor pilot as the search center. If this parameter is set to a small value, neighbor pilot signals may be located beyond the search window to miss some neighbor pilots so that neighbor set pilots cannot be added to active set and normal SHO fails. If this parameter is set to a great value, the time for AT to search for each neighboring pilot may increase to slow down the speed for searching neighbor pilot and miss the best SHO opportunity. In this way, the handoff performance of the system is potentially affected.



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Remarks For the pilots in active set, AT can set the search window center close to the earliest arriving available multipath components. For each pilot in neighbor set, by using the timing defined by AT reference baseband, AT can set the search window close to the search window offset specified by the result of pilot PN sequence plus SearchWindowOffset. The concept of the search window for 1X is similar.

5.3.11 Neighbor Search Window Offset Included (NSRCHWINOFFSETINC)

Description This parameter determines whether the NeighborList message contains the information about the offset of the neighbor set leg search window. If the message contains the information, use the value of NSRCHWINOFFSET to search the offset. If the message does not contain the information, use the default neighbor set branch to search the offset.

Type Ordinary air interface parameter of the carrier level, specified in the SearchWindowsOffsetIncluded field in the NeighborList message.


LST DONBRPARA


Default Value NO.


Remarks None.

5.3.12 Neighbor Search Window Offset (NSRCHWINOFFSET)

Description This parameter specifies the size offset of the search window for the neighbor set used by ATs in the active state.



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Type Ordinary air interface parameter of the carrier level, specified in the SearchWindowsOffset field in the NeighborList message.


LST DONBRPARA

Value Range 0 to 6.

For the relation between the values for the air interface and the offset of the search window, see Table 5-4.

Default Value 0.


Remarks This parameter together with the PN offset determines the position of the search window.

5.4 Virtual Soft Handoff 5.4.1 Default Protocol Soft Handoff Delay (SFTHODLY)

Description This parameter specifies the virtual SHO delay defined in the default protocol. This parameter specifies the minimum delay for AT to convert the DRC from the origin sector to the destination sector in sn SHO. The destination sector is the sector whose loop power control bit carried in the forward traffic channel is not the same as the origin sector. In the AN, the unit of this field is 8 timeslots. The delay specified by this parameter does not include the time for AT to use null mask to send the DRC when AT hands off from a source sector to a target sector. AT uses this parameter to adjust the algorithm for controlling the DRC handoff.

Type Air interface negotiation parameter of the BSC level.




106

LST DOGCNPA


Default Value 16 (that is, 128 timeslots).

Setting Tradeoff If this parameter is set to a great value, a long-time delay occurs to the forward transmission when the virtual SHO is performed. If this parameter is set to a small value, overlapped transmission of data occurs since the target serving sector starts to transfer data before the source serving sector stops data transmission.

Remarks Huawei recommends that DrcErasureThreshold is greater than DRCLock Interval plus one. DRCLock Interval is the product of DRCLockPeriod and DRCLockLength.

5.4.2 Default Protocol Softer Handoff Delay (SFTERHODLY)

Description This parameter specifies the default virtual softer handoff delay defined in the protocol. This parameter specifies the minimum delay for AT to convert the DRC from the origin sector to the destination sector in sn SHO. The destination sector is the sector whose loop power control bit carried in the forward traffic channel is the same as the source sector. In the AN, the unit of this field is 8 timeslots. The delay specified by this parameter does not include the time for AT to use null mask to send the DRC when AT is handed off from a source sector to a target sector. AT uses this parameter to adjust the algorithm for controlling the DRC handoff.



LST DOGCNPA


Default Value 1 (that is 8, timeslots).



107

Setting Tradeoff If this parameter is set to a great value, a long-time delay occurs to the forward transmission when the virtual SHO is performed. If this parameter is set to a small value, overlapped transmission of data occurs because the target serving sector starts to transfer data before the source serving sector stops data transmission.

Remarks Huawei recommends that you set DrcErasureThreshold greater than DRCLock Interval plus one. DRCLock Interval is the product of DRCLockPeriod and DRCLockLength.

5.4.3 Enhanced Protocol Soft Handoff Delay (ENHSOFTHODELAY)

Description This parameter specifies the virtual SHO delay defined in the enhanced default protocol. Enhancement protocol SHO delay. This parameter specifies the minimum delay for AT to convert the DRC from the origin sector to the destination sector in sn SHO. The destination sector is the sector whose loop power control bit carried in the forward traffic channel is not the same as the origin sector. In the AN, the unit of this field is 8 timeslots. The delay specified by this parameter does not include the time for AT to use null mask to send the DRC when AT hands off from a source sector to a target sector. AT uses this parameter to adjust the algorithm for controlling the DRC handoff.



LST DOGCNPA



Setting Tradeoff If this parameter is set to a great value, a long-time delay occurs to the forward transmission when the virtual SHO is performed. If this parameter is set to a small value, transmission data overlaps because the target serving sector starts to transfer data before the source serving sector stops data transmission.



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5.4.4 Enhanced Protocol Softer Handoff Delay (ENHSOFTERHODELAY)

Description This parameter specifies the virtual softer handoff delay defined in the enhanced default protocol. Enhancement protocol softer handoff delay. This parameter specifies the minimum delay for AT to convert the DRC from the origin sector to the destination sector in sn SHO. The destination sector is the sector whose loop power control bit carried in the forward traffic channel is the same as the original sector. In the AN, the unit of this field is 8 timeslots. The delay specified by this parameter does not include the time for AT to use null mask to send the DRC when AT hands off from a source sector to a target sector. AT uses this parameter to adjust the algorithm for controlling the DRC handoff.



LST DOGCNPA



Setting Tradeoff If this parameter is set to a great value, a long-time delay occurs to the forward transmission when the virtual SHO is performed. If this parameter is set to a small value, overlapped transmission of data occurs since the target serving sector starts to transfer data before the source serving sector stops data transmission.




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5.4.5 Virtual SHO Monitor Timer Length (SHOMONITORT)

Description This parameter specifies the maximum duration of virtual SHOs. If a virtual SHO does not succeed before this timer expires, the BSC determines that this handoff fails.

Type Internal ordinary parameter of the subrack level.

Related Commands MOD DOSDUPARA

LST DOSDUPARA

Value Range 1 to 10 (unit: second).

Default Value 3.

Setting Tradeoff If the value is excessively small, the success rate of virtual SHO may decrease. If the value is excessively great, the time that the FMR spends on waiting is longer.

Remarks In a virtual SHO, if the first message received by the FMR is the ForwardStopped message from the source BTS, it starts this timer and waits for the BTSs controlling other legs of the terminal to report the FowardRequest messages. If the matching succeeds before the timer expires, the virtual SHO continues. Otherwise, the virtual SHO is considered as an unsuccessful one. If the first message received by the FMR is FowardRequest, the processing is the same.

5.5 RTD Hard Handoff Parameters

5.5.1 EV-DO RTD HHO Switch (RTDDOHHOSW)

Description This parameter specifies the status of the EV-DO RTD hard handoff switch. When RTDDOHHOSW of each leg in the active set of the AN is set to ON, the RTD hard handoff algorithm decision is performed.



110

Type Internal ordinary parameter of the carrier level.

Related Commands MOD DOPHOALG

LST DORRMP

Value Range ON (enabled), OFF (disabled).

Default Value OFF (disabled).


Remarks The decision parameter of the active leg serves as the decision parameter of the RTD hard handoff.

5.5.2 RTD HHO Central Area Max. RTD Threshold (CENTERTHRLD)

Description This parameter specifies the maximum loop delay threshold in a center area for RTD hard handoffs.


Related Commands MOD DOHHORTD

LST DORRMP


Default Value 20.



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Setting Tradeoff The greater the value of this parameter, the longer the distance between the hard handoff band and the source cell is. In such cases, the hard handoff is triggered late. The smaller the value of this parameter, the shorter the distance between the hard handoff band and the source cell is. In such cases, the hard handoff is triggered early.

Remarks None.

5.5.3 RTD HHO Border Area Max. RTD Threshold (BORDERTHRLD)

Description This parameter specifies the maximum loop delay threshold in a border area.



LST DORRMP


Default Value 50.

Setting Tradeoff When CENTERTHRLD is set to a fixed value, this parameter is directly proportional to the opportunity that the AN requests the AT to report RouteUpdate. If the value is excessively small, a hard handoff may be triggered before the AT is close enough to the center of the target sector, that is, the hard handoff is triggered too early.

If the value is great, the AN has more opportunities to request RouteUpdate from the AT, and the AN can obtain enough information about the current radio environment of the AT. If the parameter appropriately is set to a high value, and if the pilot strength of the target sector cannot reach ECIOTHRLD, however, the AT may already be far away from the source sector but the hard handoff does not happen in time, resulting in a hard handoff failure (the hard handoff is implemented too late).

Remarks None.



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5.5.4 RTD HHO Border Area EC/IO Strength Absolute Threshold (ECIOTHRLD)

Description When the minimum RTD in the active set is between the value of CENTERTHRLD and the value of BORDERTHRLD, and when the strongest pilot strength of the SHO in the target active set is lower than ECIOTHRLD, an RTD hard handoff is triggered.



LST DORRMP



Setting Tradeoff If the value is excessively small, handoffs may not be triggered in time, that is, no handoff is triggered even when an AT is close to the center of the target sector. This may result in hard handoff failure. If the value is excessively great, hard handoffs may occur too early. In this case, the AT may not be close enough to the center of the target sector, and the target BTS may not be able to detect the AT.

Remarks None.

5.6 OFS Hard Handoff Parameters 5.6.1 EV-DO OFS HHO Switch (OFSDOHHOSW)

Description This parameter specifies the status of the EV-DO inter-frequency search HHO switch.




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LST DORRMP

Value Range ON (enabled), or OFF (disabled).

Default Value OFF.


Remarks If the information about inter-frequency neighbor cells is configured, the system sends this information to the AT no matter whether OFSDOHHOSW is enabled. The AT periodically checks whether the inter-frequency search is required. If the triggering conditions are met, the hard handoff is performed.

If OFSDOHHOSW of the leg with the strongest strength in the active set is enabled, the decision for an inter-frequency search hard handoff algorithm is performed.

5.6.2 OFS HHO Relative Threshold (RELTHRLD)

Description This parameter specifies the relative threshold of the Ec/Io strength used for the OFS hard handoff. If the strongest strength of the inter-frequency carrier minus the strongest strength of the serving carrier is greater than the value of this parameter, an OFS hard handoff is triggered.


Related Commands MOD DOHHOOFS

LST DORRMP


Default Value 5.



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Setting Tradeoff The decision parameter of the strongest pilot in the target active set serves as the decision parameter of the OFS hard handoff.

5.7 Parameters Configured for the Intra-Frequency HHO 5.7.1 EV-DO SF HHO Switch (SFDOHHOSW)

Description This parameter specifies the status of the EV-DO intra-frequency HHO switch.



LST DORRMP




Remarks The intra-frequency hard handoff is triggered if the switch of any leg in the active set is enabled.

5.7.2 Relative Threshold of Intra-Frequency Hard Handoff (RELATHRESH)

Description This parameter specifies the minimum strength difference between the strength of the intra-frequency HHO target active set and that of the SHO target active set.



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When the strongest pilot strength of the intra-frequency hard handoff target active set minus that of the SHO target active set is higher than this parameter, an intra-frequency hard handoff is triggered.


Related Commands MOD DOHHOSF

LST DORRMP


Default Value 5 (2.5 dB).

Setting Tradeoff The smaller the value of this parameter is, the easier for the HHO to be triggered. In such cases, the signals on the forward channels of the source cell do not deteriorate to a great extent. This helps the AT to receive the HDM of the original cell, but the AT may not successfully capture a forward channel of the target cell. The higher the value of this parameter, the harder for the intra-frequency HHO to be triggered, which helps the AT to capture the forward channels of the target cell. Due to poor signals from the source cell in the HHO, the AT may not receive the TCA message from the source cell.

Remarks Select the decision parameter of the active set leg of which the switch is enabled as the decision parameter for the intra-frequency hard handoff.

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

Description This parameter specifies the pilot strength required for the AT to perform the intra-frequency HHO from the source cell to the target cell.

When the integrated pilot strength of the intra-frequency hard handoff in the target set is higher than TRGABSTHRESH, and when the integrated pilot strength of the SHO target active set is higher than SRCABSTHRESH, an intra-frequency hard handoff is triggered.




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LST DORRMP

Value Range 0 to 63 (unit: –0.5 dB).

Default Value 8 (–4 dB).

Setting Tradeoff If this parameter is set to a small value, the signal strength of the source cell side is low when the AT performs the HHO from the source cell to the target cell. In this case, the AT cannot receive the TCA message delivered by the BTS at the source cell side, and the HHO fails. If this parameter is set to a great value, the triggering conditions of intra-frequency HHOs can be easily met. In this case, the HHO is triggered depending on the intra-frequency HHO absolute threshold.

Remarks None.

5.7.4 Handoff Threshold of the Target Carrier of the Intra-Frequency Hard Handoff (TRGABSTHRESH)

Description This parameter specifies the signal strength of the target cell for the intra-frequency HHO.



LST DORRMP

Value Range 0 to 63 (unit: –0.5 dB).

Default Value 4.



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Setting Tradeoff The smaller the value of this parameter is, the easier for the intra-frequency HHO to be triggered. The radio environment after the AT handoff, however, cannot be guaranteed. In this case, the AT cannot capture the target cell, and the HHO fails. The higher the value of this parameter is, the harder for the intra-frequency HHO to be triggered. In this case, the AT can easily capture the channel of the target cell.

Remarks None.

5.7.5 EV-DO Same-Frequency HHO Period Deliver RUR Switch (DOSFHHORURSW)

Description This parameter determines whether the Route Update request is periodically transmitted during an EV-DO intra-frequency hard handoff. An intra-frequency hard handoff is triggered when the switch is enabled.



LST DOHO

Value Range ON (enabled) or OFF (disabled).

Default Value OFF.


Remarks This switch can be used in the intra-frequency hard handoffs between ANs and used on the EV-DO Rev. A ATs. The parameter takes effect only when it is set to ON and the intra-frequency hard handoff switch is enabled.



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5.8 AN Assisted Inter-AN HHO Parameters 5.8.1 AN-Assisted Inter-AN HO Switch (ANHOSWITCH)

Description This parameter specifies the switch of the AN assisted inter-AN handoff.



LST DOHO

Value Range ON (enabled, OFF (disabled).



Remarks AN assisted inter-AN handoff refers to the process wherein the AN determines the time for releasing a connection and initiates the release. If AN assisted inter-AN handoff switch is enabled when the AN handles the RouteUpdate message, the AN checks whether there are pilots of other ANs in the pilots reported by the RouteUpdate message. If there are pilots from an external AN, and the strongest pilot of the external AN is higher than the strongest pilot of this ANHOCOMP, this AN initiates the connection release.

5.9 Parameters Configured for Other Hard Handoff 5.9.1 Inter-AN HHO Division Switch (INTERANHHODIVSW)

Description This parameter specifies the status of the inter-AN HHO switch.




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LST DOHO


Default Value ON (enabled).


Remarks This parameter is used during the inter-AN hard handoffs. The parameter takes effect only when it is set to ON and the corresponding hard handoff switch is enabled.

5.9.2 Neighbor AN Call Transfer Switch (DOSHOSW)

Description This parameter specifies the status of the neighbor-AN call park switch.


Related Commands MOD NBRAN

LST NBRAN

Value Range ON (enabled, OFF (disabled).





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Remarks This parameter is used during the inter-AN call migration. If the information about a new neighboring AN is added through the ADD NBRAN command, this parameter takes effect after DOSHOSW is enabled through the MOD NBRAN command.

5.9.3 Call Park Delay Timer (No. 18 Timer of the RRM)

Description If all the legs in the active set are from the AN rather than the serving AN, call migration can be performed only after the time length of No. 18 Timer of the RRM is prolonged.

Type Internal timer of the BSC level.

Related Commands MOD TMR

LST TMR

Value Range 0 to 30000 (unit: ms).

Default Value 3000 ms.

Setting Tradeoff The time for the call park has a great impact on the effect of the call park. If the call park is performed too early, the inter-AN HHO is frequently performed around the boundaries of the AN. In this case, the inter-AN SHO becomes the inter-AN HHO, which does not show the value of the SHO. If the call park is performed too late, too much inter-AN link bandwidth is occupied, which is a waste of A18 link resources.

Remarks None.

5.9.4 Intra-AN HHO Macro Division Switch (INTRAANHHOMACRODIVSW)

Description This parameter determines whether to allow the intra-AN hard handoff macro diversity.



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LST DOHO

Value Range ON (enable), or OFF (disable).

Default Value ON.

Setting Tradeoff The HHO macro diversity enables the ATs to perform HHOs to multiple target carriers and helps use the SHO gains in time to improve the HHO success rate. However, too many HHO target carriers may occupy excessive resource instantly.

Remarks None.

5.9.5 EV-DO HHO Max. Target Number (DOHHOMAXTARGNUM)

Description This parameter specifies the maximum number of legs in the HHO target active set. According to the protocol, the active set of an AT supports a maximum of six legs.

Type Internal parameter of the BSC level.

Related Commands: MOD DOHO

LST DOHO

Value Range 1 to 6.

Default Value 6.



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Setting Tradeoff If the strength measurable HHO algorithm for the HHO target pilot is used, you are advised to set this parameter to 3. This is consistent with the maximum number of legs in the SHO target active set wherein the strength of the target pilot is known and the HHO target is accurate. If the strength immeasurable HHO algorithm for the HHO target pilot is used, you are advised to set this parameter to a higher value, which can increase the HHO success rate, because the strength of the target pilot (obtained through data configuration) is unknown and the HHO target may be inaccurate.

Remarks None.

5.9.6 EV-DO Data Call Supported HO Type (DOHOTP)

Description This parameter specifies the handoff type supported by external carriers.


Related Commands ADD OUTCDMACH/MOD OUTCDMACH

LST CDMACH

Value Range SHO (supporting inter-AN SHOs).

HHO (supporting only hard handoffs).

NHO (not supporting handoffs).

Default Value None. Set according to actual conditions.


Remarks If this parameter is set to SHO (supporting inter-AN SHOs), this indicates that the external carriers support soft handoffs and hard handoffs. In this case, if the A17/A18 link is configured between the ANs where the external carriers operate, and if a soft handoff is required between the ANs, this parameter must be set to SHO; however, if the soft handoff



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cannot be implemented, this parameter should be set to HHO. This parameter is seldom set to NHO.

5.9.7 EV-DO Multi-BandClass HHO Switch (DOMULTIBANDHHOSW)

Description This parameter determines whether the inter-band HHO is enabled or not.



LST DORRMP




Remarks Coverage differences between frequency bands should be considered in inter-band HHOs.

5.9.8 EV-DO HHO Delay Switch (DOHHOALGSWDELAY)

Description This parameter works on the target pilot of EV-DO HHOs. If this parameter is set to ON, an AT that moves to the target carrier must postpone its next hard handoff to prevent ping-pong handoffs.





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LST DOHO


Default Value ON.


Remarks None.

5.9.9 Detect Pilot Pollution Switch (POLLUTESWITCH)

Description This parameter determines whether the pilot pollution detection is allowed or not. Pilot pollution does not refer to a major pilot but refers to a large number of pilots with similar strengths in the radio environment. According to the pilot strength information carried in the RouteUpdate message reported by the AT, if the pilot pollution decision conditions are met, output the pilot pollution information to the log filer to facilitate network optimization. The following two conditions for pilot pollution should be met:

In the RouteUpdate message, the number of pilots whose strength is greater than that of pilots in the PilotAdd message is not less than the number of legs in pilot pollution.

In the RouteUpdate message, the strength difference between the strongest pilot and the second strongest pilot is not more than the pilot pollution relative threshold.

Type Parameter of the BSC level.


LST DOHO


Default Value ON.



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Setting Tradeoff Pilot pollution increases the ratio of SHOs. The EV-DO system does not support SHOs, thus too many pilots cause interference.

Remarks Only when this parameter is set to ON, the set number of legs in pilot pollution and relative threshold for pilot pollution are effective.

5.9.10 Detect Missing Neighbor Cell Switch (DETECTMISSPILOTSWITCH)

Description This parameter determines whether to detect the missing neighboring cells.

Type Parameter of the BSC level.


LST DOHO


Default Value ON.


Remarks If any pilot is not in the active set or neighbor set of the AN, this is called un-configured intra-frequency neighboring cells. After the un-configured neighboring cell detection switch is enabled, this case can be recorded into the log file, covering the module ID, carrier ID, and strength of all pilots in the current active set. In addition, the information such as the PHPhase and pilot strength of unknown pilots is recorded for reference to neighbor relation configuration.



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6 Reverse Power Control Parameters

Reverse power control is classified into open loop power control and closed loop power control. Reverse closed loop power control has two categories: reverse outer loop power control and reverse inner loop power control. Through reverse power control, the AT adjusts the transmit power to the minimum so that the interference caused by the transmit power is minimized.

6.1 EV-DO Rev. A Power Control Parameters 6.1.1 Reverse Target PER (DOAREVPER)

Description This parameter specifies the target PER when the AT transmits data on the reverse channel. Package Error Rate refers to the ratio of the number of received error data packets to the total number of received data packets.

Type Internal ordinary parameter of the carrier level. This parameter is not sent to the AT.

Related Commands MOD DOARPCP

LST DORRMP

Value Range RPER1 (0.1) to RPER300 (30) (unit: 1%).

Default Value RPER10 (1), that is 1%.

Setting Tradeoff To set the reverse target PER, you need to find the balance between the reverse transmit power and contribution to system load. If the reverse target PER is set lower, the transmit power of the AT must be higher, and the contribution to system reverse load is greater. On the



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contrary, if the reverse target PER is set higher, the requirement for the transmit power of the AT is lower, and the contribution to system reverse load is smaller.

Remarks The reverse PER affects the sector throughput.

6.1.2 Min. PCT (DOAMINPCT)

Description This parameter specifies the minimum PCT for outer loop power control.



LST DORRMP

Value Range –28672 to –12416 (unit: 1/1024 dB).

Default Value –22016 (that is –21.5 dB).

Setting Tradeoff When the same target PER is reached, the PCT changes with the link condition such as the change of SHO legs, that is, the PCT changes dynamically. This parameter is defined together with the DOAMAXPCT. The lower the value of this parameter is, the wider the dynamic changing range of the PCT. When the reverse link condition is good, the transmit power of the AT can be saved, and the reverse system load is reduced. If fast fading occurs, the AT cannot enhance the power timely, thus affecting the transmission performance. If the value of this parameter is set higher, negative impacts of fast fading can be suppressed. In this case, however, the transmit power of the AT is wasted, thus increasing the system RSSI and reducing the reverse capacity.

Remarks The outer loop power control adjusts the PCT target value of the reverse pilot channel so that the target PER can be guaranteed. The inner loop power control is performed on the BTS. After comparing the received power of the AT with the target PCT, the BTS orders the AT to increase or reduce the transmit power. The DOAMINPCT (minimum PCT), INIPCT (initial PCT), and MAXPCT (maximum PCT) must satisfy the following conditions: DOAMINPCT ≤ INIPCT ≤ DOAMAXPCT; DOAMINPCT ≤ DOAMAXPCT (No data transmitted) ≤ DOAMAXPCT



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6.1.3 Max. PCT (DOAMAXPCT)

Description This parameter specifies the maximum PCT allowed for outer loop power control.



LST DORRMP


Default Value –17920 (that is, –17.5 dB).

Setting Tradeoff This parameter is defined with the minimum PCT. A high value of this parameter effectively reduces the negative impact of drastically changing radio environment on the system and guarantees the reverse PER. In addition, it may increase the reverse transmit power and reduces system reverse capacity. On the contrary, a low value of this parameter cannot resist the negative impact of drastically changing radio environment on the system or guarantee the reverse PER.

Remarks DOAMINPCT, INIPCT (initial PCT), and DOAMAXPCT (maximum PCT) must satisfy the following conditions: DOAMINPCT ≤ INIPCT ≤ DOAMAXPCT; DOAMINPCT ≤ DOAMAXPCT (No data transmitted) ≤ MAXPCTInitial PCT (DOAINITPCT)

6.1.4 Initial PCT (DOAINITPCT)

Description This parameter specifies the initial PCT for outer loop power control. During power control, the BSC keeps adjusting the PCT between the minimum value and the maximum value.




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LST DORRMP


Default Value –18432 (that is –18 dB).

Setting Tradeoff A high value of this parameter reduces the number of reverse error packets in initial call setup and guarantees the reverse PER. On the contrary, a low value of this parameter may cause a high PER in initial call setup.

Remarks DOAMINPCT (minimum PCT), INIPCT (initial PCT), and DOAMAXPCT (maximum PCT) must satisfy the following conditions: DOAMINPCT ≤ INIPCT ≤ DOAMAXPCT; DOAMINPCT ≤ DOAMAXPCT (No data transmitted) ≤ MAXPCTInitial PCT (DOAINITPCT)

6.1.5 RPC Step (RPCStep)

Description This parameter specifies the increased or reduced power of the AT required when the AN controls the reverse transmit power. This parameter is a configuration negotiation parameter of the user level defined in the MAC layer-3 protocol for the EV-DO Rev. A reverse traffic channel.

Type Parameter of the BSC level. This parameter is carried in the PowerParameters attribute of configuration negotiation.

Related Commands MOD RLMACUPA

LST RLMACUPA

Value Range DB05 (0.5 dB), DB10 (1 dB).



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Default Value 1 dB (1).

Setting Tradeoff The main difference between this parameter and the RPC step specified in the default protocol is that they are dedicated to different networks: this parameter is used in the EV-DO Rev. A network, whereas the latter one is used in the EV-DO Rel. 0 network.

Remarks The RPC step specified in the default protocol is used in the EV-DO Rel. 0 network. In the EV-DO Rel. 0 network, reverse inner loop power control is implemented by the BTS based on the status of each frame. In the EV-DO Rev. A network, the reverse inner loop power control combined with the ARQ mechanism is implemented on the basis of the termination target of each subframe, and the power control rate is 150 Hz (1 frame = 4 subframes = 16 slots = 2048 chips; encoding rate = 1.2288 Mchip/s). The PCT set through the outer loop power control is transmitted to the BTS through a forward idle frame over the Abis interface. Thus, the impact of the forward flow control on the outer loop power control is avoided. However, the idle frame carrying the PCT may be discarded because of congestion control. The BTS compares the PCT of the received reverse pilot signal with the target PCT. If the former PCT is less than the latter one, the BTS requests the AT to increase its transmit power; if the former one is greater than the latter one, the BTS requests the AT to decrease its transmit power. Additionally, the BTS sends the AT the power control bit on the forward RPC channel. If this bit is 0, it indicates that the power increases by one RPC step; if this bit is 1, it indicates that the power decreases by one RPC step (one RPC step = 0.5 dB or 1 dB). RPCStep is defined in the PowerParameters attribute table during the MAC protocol negotiation on the reverse traffic channel. During a softer handoff, the control bit delivered by each leg is the same, and the AT combines these control bits to the largest extent. During a soft handoff, the AT decreases its transmit power if the control bits delivered by the legs are different and the RPC delivered by any of the legs is 1.

6.1.6 Modifying the Relation Between the Reverse PER and Down Step

Description This parameter is used to modify the relation between the target PER and PCT decrease step. The EV-DO Rev. A supports the PER ranging from 0.1% to 30% (totaling 27 classes). Each PER can be set with a decrease step in a different range.

Type Internal parameter of the carrier level.

Related Commands MOD DOARPDS

LST DORRMP



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Value Range 0 to 1024 (unit: 1/1024 dB).

Default Value See the following table:

Parameter Default Value Level

Decrease step when the PER is 0.1% 1 Ordinary





Setting Tradeoff This higher the value of this parameter is, the faster the PCT decreases. In addition, a high value of this parameter adjusts the power quickly, but it may cause drastically changing PERs. If the value of this parameter is set too low, the transmit power of the AT may stay too high for a long time.

Remarks The current PER is 1% by default, and the corresponding decrease step is 5/1024 dB.

6.1.7 Forward Traffic Channel Sending Down RPC Time (FLSNDRPCDWN)

Description This parameter specifies the time for the forward traffic channel to continuously send the decrease RPC. That is, after the forward traffic channel is disabled, it continuously sends decrease reverse power control bits.



DSP CBTSCFG



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Value Range 0 to 255

Default Value Default value of CSM5500 chips: 0; default value of CSM6800 chips: 0.


Remarks None.

6.2 EV-DO Rel. 0 Power Control Parameters 6.2.1 Reverse Target PER (REVPER)

Description This parameter specifies the expected PER when the AT reversely transmits data. This parameter indicates the ratio of the number of received error data packets to the total number of received data packets.

Type Internal parameter of the carrier level. This parameter is not sent to the AT.

Related Commands MOD DORPCP

LST DORRMP

Value Range 1 to 99 (unit: 1%)

Default Value 1 (that is, 1%)

Setting Tradeoff To set the reverse target PER, you need to find the balance between the reverse transmit power and contribution to system load. If the reverse target PER is set lower, the transmit power of the AT must be higher, and the contribution to system reverse load is greater. On the contrary, if the reverse target PER is set higher, the requirement for the transmit power of the AT is lower, and the contribution to system reverse load is smaller.



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Remarks The reverse PER affects the sector throughput.

6.2.2 Min. PCT (DOAMINPCT)

Description This parameter specifies the minimum PCT allowed for outer loop power control.



LST DORRMP

Value Range –28672 to –12416 (unit: 1/1024 dB)

Default Value –22528 (that is, –22 dB)

Setting Tradeoff When the same target PER is found through convergence, the PCT changes with the link condition such as the change of SHO legs, that is, the PCT changes dynamically. This parameter is defined together with the maximum PCT. The lower the value of this parameter is, the wider the dynamic changing range of the PCT. When the reverse link condition is good, the transmit power of the AT can be saved, and the reverse system load is reduced. If fast fading occurs, the AT cannot enhance the power timely, thus affecting the transmission performance. If the value of this parameter is set higher, negative impacts of fast fading can be suppressed. In this case, however, the transmit power of the AT is wasted, thus increasing the system RSSI and reducing the reverse capacity.


6.2.3 Max. PCT (DOAMAXPCT)

Description This parameter specifies the maximum PCT allowed for outer loop power control.



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LST DORRMP



Setting Tradeoff This parameter is defined with the minimum PCT. A higher value of this parameter effectively reduces the negative impact of drastically changing radio environment on the system and guarantees the reverse PER. In addition, it may increase the reverse transmit power and reduces system reverse capacity. On the contrary, a lower value of this parameter cannot resist the negative impact of drastically changing radio environment on the system or guarantee the reverse PER.


6.2.4 Initial PCT (DOAINITPCT)

Description This parameter specifies the initial PCT for outer loop power control. During power control, the BSC adjusts the PCT between the minimum value and the maximum value.



LST DORRMP




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Setting Tradeoff A high value of this parameter reduces the number of reverse error packets in initial call setup and guarantees the reverse PRE. On the contrary, a low value of this parameter may cause a high PER in initial call setup.


6.2.5 RPC Step (RPCSTEP)

Description This parameter specifies the increased or reduced power of the AT required when the AN controls the reverse transmit power. This parameter indicates the default RPC step defined in the protocol.

Type Parameter of the BSC level. This parameter is carried in the PowerParameters attribute of configuration negotiation.


LST DOGCNPA

Value Range DB05 (0.5 dB), DB10 (1 dB).

Default Value

Attribute Personality0 Personality1 Personality2 Personality3

RPC step 1 dB 1 dB 1 dB 1 dB

Setting Tradeoff If this parameter is set to a great value, the AT may send data at a high power to reach the required level quickly, thus wasting power. If this parameter is set to a small value, the



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expected level is reached slowly, but this reduces interference to other ATs, thus preventing unnecessary power wastage.

Remarks For details, see the description of RPCStep.



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7 Multi-Flow Packet Application Parameters

7.1 DPA Parameters All the parameters described in this section are EV-DO Rel. 0 parameters.

7.1.1 DPA Protocol RAN Handoff (RANHANDOFF)

Description This parameter is used during the handoff between the 1X system and the EV-DO system. This parameter indicates whether the AT initiates the location update request when it is in the handoff area between two systems.

Type Globally configured negotiation parameter, specified in the configuration request message.


LST DOGCNPA

Value Range YES (allowed), or NO (not allowed).

Default Value YES (allowed).


Remarks When the 1X BSC and the EV-DO AN are connected to different PDSNs, you are advised to set this parameter to YES.



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7.1.2 Length of Timer for RLP to Wait for Data Retransmission (ABORTTLEN)

Description This parameter specifies the maximum length of reverse data retransmission waiting. When the reverse data is lost, the RLP sends the NAK message, and this timer is started. If the reverse retransmission data is not received before the timer expires, the RLP transmits data in the buffer area to the upper layer.



LST DOSDUPARA

Value Range 1 to 1000 (unit: ms)

Default Value 500

Setting Tradeoff To process DS services, set this parameter to the lowest value to satisfy the delay requirement for upper-layer application. This, however, increases the number of times of RLP packet abortion. To process non-DS services, set this parameter to the highest value to ensure reliable connection.

Remarks Constant defined in the protocol. You are advised not to modify this parameter.

7.1.3 RLP Flush Timer Length (FLUSHTLEN)

Description This parameter specifies the maximum interval between forward byte flows sent by the RLP. If no forward RLP data is sent before the timer expires, the RLP sends byte flows containing recently transmitted bytes.




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LST DOSDUPARA


Default Value 300

Setting Tradeoff To process DS services, set this parameter to the lowest value to meet the to meet the delay requirement for upper-layer application. To process non-DS services, set this parameter to the highest value to ensure reliable connection.

Remarks Constant defined in the protocol. You are advised not to modify this parameter. When this timer expires, the transmit end sends the data containing the latest transmitted bytes. In the NAK mechanism, if the last one byte is lost, the peer end does not send the NAK message. This parameter is used to solve such problem.

7.1.4 Deactivation Timer Length (INACTIVETLEN)

Description This parameter specifies the maximum lasting length when there is no data transmission on both forward and reverse links. If no forward or reverse data is transmitted before the timer expires, the current connection is released.



LST DOSDUPARA

Value Range 10 to 255 (unit: s)

Default Value 30



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Setting Tradeoff If this parameter is set to a small value, connection is frequently set up and released. This can save air interface resources and reduces call drops. If this parameter is set to a great value, resources are wasted.

Remarks None.

7.2 MFPA Parameters 7.2.1 MPA Protocol RAN Handoff (MPARANHANDOFF)

It is the same as the parameter in section 7.1.1 .

ength.

7.3 EMFPA Parameters 7.3.1 EMPAProtocolRANHandoff(EMPARANHANDOFF)

The description is the same as that in section 7.1.1 .



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8 Admission and Load Control Parameters

8.1 Hard Assignment Parameters When the hard allocation algorithm is enabled, the AN performs the hard allocation for calls accessing the network according to the load measurement standard and direction defined by the system, hard allocation threshold, and current hard allocation algorithm.

Measurement factors that indicate the load measurement standard are described as follows:

Measurement factors that indicate the forward load:

Total timeslot occupancy ratio of EF flow and AF flow Equivalent bandwidth of EF flow and AF flow Number of flow, including EF flow, AF flow, and BE flow Number of equivalent QoS users, which is applicable to EV-DO ReI0. Weight based on

the QoS weight of a call. Average timeslot occupancy ratio of a BE flow

Formula: Average timeslot occupancy ratio of a BE flow = (100% – (Total timeslot occupancy ratio of EF flow and AF flow))/Number of BE flow

Measurement factors that indicate the reverse load:

RoT Computed Load

The following table describes the application scenarios for hard assignment algorithms:

Scenario Algorithm

The AT accesses frequency A. Loads at frequency A and frequency B are light and the call is assigned to access frequency A by adopting the HASH algorithm. That is, ensure the load balancing between frequencies through the balance kept by the AT.

Adopt the hard assignment algorithm of EV-DO access priority. You can measure the carrier load based on the forward load or reverse load.



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The AT (ReI0) accesses frequency A. Carrier version A is preferred at frequency A while carrier version 0 is preferred at frequency Bloods at frequency A and frequency B are light and the call is assigned to access frequency B. When the AT migrates from the DO_Rel. A cell to the DO_Rel. 0 cell, the occurrences of hard handover can be reduced. NOTE:

In this part, the carrier refers to the DO_Rel. A carrier.

Adopt the hard assignment algorithm of EV-DO version priority. You can measure the carrier load based on the forward load or reverse load.

The AT accesses frequency A. The priority of frequency B is higher than that of frequency A. Loads at frequency A and frequency B are light and the call is assigned to access frequency B. At the border covering both urban and rural areas, set up calls at wide coverage frequencies. This can effectively reduce hard handover.

Adopt the hard assignment algorithm of priority. You can measure the carrier load based on the forward load or reverse load.

The AT accesses frequency A. Loads at frequency A and frequency B are heavy but the load at frequency A is heavier than that of frequency B. The call is assigned to frequency B. The balanced load prevents a situation wherein certain carriers are overloaded and other carriers are idle

Adopt the hard assignment algorithm of load balancing.You can measure the carrier load based on the forward load or reverse load.

The AT accesses frequency A. Interference at frequency A is great. Therefore, assign the AT to carrier B with no or little interference. When the load on carrier B exceeds the admission threshold, perform interference retrieval to assign users to carrier A.

RSSI hard assignment and interference retrieval.

When ASSALWDO is set to ON, the hard assignment algorithm of load balancing and hard assignment algorithm of priority are enabled. Other hard assignment algorithms can be enabled only when the corresponding algorithm switches are set to ON. When all the hard assignment algorithms take effect, the priority of system processing is as follows: RSSI hard assignment, hard assignment of access priority, hard assignment of version priority (select carriers with high priorities and whose assigned threshold is lower than the hard assignment threshold), hard assignment of load balancing (select the carrier with high priority and low load), and interference retrieval.

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

Description This parameter specifies the hard assignment allowed in a cell or not.

Type Ordinary internal parameter of the sector level.

Related Commands ADD CELL / MOD CELL

LST CELL



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Value Range YES (allowed), or NO (prohibited).

Default Value NO.


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

8.1.2 EV-DO Multi Band Assignment Switch (DOMULTIBANDASSIGNSW)

Description This parameter specifies the EV-DO inter-band hard assignment allowed or not. If this switch is set to ON, a call can be assigned to a suitable frequency on any band in the local sector where the hard assignment switch is enabled. If this switch is set to OFF, a call can be assigned to a suitable frequency only on the access band. This switch only applies to calls from EV-DO Rev. A ATs.


Related Commands ADD CELL/MOD CELL

LST CELL


Default Value OFF.




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Remarks Inter-band hard assignment does not apply to EV-DO Rel. 0 ATs because the configuration protocol specifies only the bands supported by EV-DO Rev. A ATs. Before enabling inter-band hard assignment of an EV-DO Rel. 0 AT, check whether it supports other bands. Disable inter-band assignment if the AT does not support other bands.

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

Description This parameter specifies the RSSI-based reverse hard assignment algorithm function enabled in a cell or not. If the function is enabled, a call is not assigned to a frequency with higher RSSI value.



LST CELL

Value Range OFF (disabled)

ON1 (enabled on the basis of the absolute RSSI value)

ON2 (enabled on the basis of the relative RSSI value and the number of equivalent users)

Default Value OFF.


Remarks 1. If the function of reverse RSSI hard assignment is required, you must enable the "hard

assignment allowed" switch. 2. If reverse interference constantly exists, solve the problem through frequency clearance.

The function of reverse RSSI hard assignment is only a temporary measure to locate the interference source and curb interference, but this measure cannot fundamentally solve the problem.



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8.1.4 EV-DO Rev. A Prevision Priority Assign Carrier Switch (DOAPRVPRIASSSW)

Description This parameter specifies the hard assignment of EV-DO Rev. A carrier version priority allowed in a cell or not. You need to assign calls according to service types. If the type of a call service is EV-DO Rev. A, assign the call to the carrier whose EV_DO Rev. A version is preferential. If the type is EV-DO Rel. 0, assign the call to the carrier whose EV-DO Rel. 0 version is preferential.



LST CELL


Default Value OFF.


Remarks None.

8.1.5 Access Priority Assign Carrier Switch (DOAACCPRIASSSW)

Description This parameter specifies the switch for hard assignment of access carrier priority allowed in a cell or not.

Type Ordinary internal parameter of the carrier level.



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Related Commands MOD DOACAP

LST DORRMP


Default Value OFF.


Remarks None.

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

Description Absolute threshold of hard assignment of the number of equivalent users on the EV-DO carrier.

If LDMEASMODE is set to EQU and DOAACCPRIASSSW or DOAPRVPRIASSSW is set to ON, ASSTHRESH takes effect. When either of the following conditions is satisfied, assignment is performed on the basis of the access priority or the version priority. If the access priority hard assignment and the prevision priority hard assignment are not enabled, the ATs are assigned to work on the carriers bearing the services of few subscribers.

Condition 1: number of the equivalent ATs working on the access carrier ≤ ASSTHRESH

Condition 2: Number of the equivalent subscribers working on the access carrier > Value of ASSTHRESH, and (number of the equivalent subscribers working on the access carrier – minimum number of the equivalent subscribers working on all carriers) ≤ ASSRELATHRESH



LST DORRMP



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Value Range 1 to 65535 in the unit of user.

Default Value 20.

Setting Tradeoff To describe this parameter in details, assume that DOAPRVPRIASSSW is enabled. If the parameter is set to a high value, the possibility of assigning calls to the access carrier increases. But this affects the load balancing of carriers. If the parameter is set to a small value, the possibility of assigning calls to the access carrier decreases. But this facilitates the load balancing of carriers.

Remarks None.

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

Description This parameter specifies the relative threshold of the number of equivalent users on the EV-DO carrier.



LST DORRMP


Default Value 5.

Setting Tradeoff If the parameter is set to a high value, the possibility that calls are assigned to the access carrier increases. But this affects the load balancing of carriers. If the parameter is set to a small value, the possibility that calls are assigned to the access carrier decreases. But this facilitates the load balancing of carriers.



148

Remarks None.

8.1.8 EV-DO Rev. A Carrier Prevision Priority (CARRPRVPRI)

Description This parameter specifies the version priority of the EV-DO Rev. A carrier. When the hard assignment algorithm of version priority is adopted, the system assigns calls to the carrier that corresponds to the AT service version. This parameter needs to be used with the switch for hard assignment of version priority.



LST DORRMP

Value Range DOA (EV-DO Rev. A version is preferential), DO0 (EV-DO Rel. 0 version is preferential).

Default Value DOA.


Remarks None.

.

8.1.9 Hard Assign Equivalent Subscribers (ASSIGNEQUUSERS)

Description This parameter specifies the number of equivalent users for each QoS level used in hard assignment.




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Related Commands MOD DOQOS

LST DOQOS

Value Range 1 to 32 at each level in the unit of user.

Default Value GOLD(GOLD SUBSCRIBER): 4

SILVER(SILVER SUBSCRIBER): 2

BRONZE(BRONZE SUBSCRIBER): 1

LINE1(PRIVATE LINE SUBSCRIBER 1): 4



Setting Tradeoff If this parameter is set to a very large or small value, the determination on carrier load is affected.

Remarks Generally, the value of this parameter is not changed.

8.1.10 Pilot Priority Level (PLTPL)

Description This parameter specifies the modification of the carrier priority. The carrier priority ensures that, when multiple carriers meet the priority condition, the one with the highest priority and lowest load is selected. For example, when a service is accessed, if two carriers are provided, the one with high priority is selected. If priorities of these two carriers are the same, the carrier with low load is selected.



LST CDMACH



150

Value Range 1 to 6 (the smaller value indicates higher priority).

Default Value 1.

Setting Tradeoff If this parameter is set to a high value, the possibility that calls are assigned to the carrier increases in the priority hard assignment. If this parameter is set to a low value, the possibility that calls are assigned to the carrier decreases.

Remarks Except for special configuration strategy, in ordinary multi-carrier network configurations, you are recommended to set the priorities of all the carriers to the same value (the default value is 1). The carrier priority function is not recommended.

8.2 EV-DO Service Parameters 8.2.1 EV-DO Rel. 0 Max. Carrier Users (MAXCHANNUM)

Description This parameter specifies the maximum number of legs that can be set up on an EV-DO Rel. 0 carrier.


Related Commands MOD DOSP

LST DORRMP

Value Range 0 to 59 in the unit of user

Default Value 31



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Setting Tradeoff If the parameter is set to a high value, more users can access the system, but the transmission performance for a single user degrades.

Remarks None.

8.2.2 EV-DO Rev. A Max. Carrier Users (DOAMAXCHANNUM)

Description This parameter specifies the maximum number of legs that can be set up on an EV-DO Rev. A carrier.



LST DORRMP

Value Range 0 to 114 in the unit of user

Default Value 61

Setting Tradeoff If the parameter is set to a high value, more users can access the system, but the transmission performance for a single user degrades.

Remarks None.

8.2.3 RAB Length (RABLENGTH)

Description This parameter specifies the number of timeslots occupied for transmitting the reverse activity bit (RAB) of the EV-DO Rel. 0 carrier. It is effective for EV-DO 0 ATs only. Each RA bit is repeated and transmitted in consecutive timeslots in the number of RABLength. The RA bit in each timeslot needs to be repeated for the second time. Each RA bit is transmitted at timeslot T that meets the following condition:



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T MOD RABLength = RABOffset x RABLength/8

Type Ordinary air interface parameter of the carrier level, transmitted in the RABLength domain of TrafficChannelAssignment message.


LST DORRMP

Value Range 8, 16, 32, and 64, in the unit of timeslot.

Default Value 8.

Setting Tradeoff If the parameter is set to a very small value, an AT on the cell edge cannot correctly demodulate the RA channel. If this parameter is set to a very high value, the period for rate control is long, which results in a delayed reflection of system load and radio link change.

Remarks The RAB is transmitted on the RA channel which is the sub-channel of the forward MAC channel. The assigned MAC Index value is 4. The RAB identifies reverse overload of system. The system measures the received level to determine whether the reverse link is overloaded, and then determines the RA value. According to the RA value, the AT dynamically adjusts the reverse service rate. When the RA is set to 0, the reverse link is not overloaded. Therefore, the AT determines whether to increase the service rate based on the conversion probability. When the RA is set to 1, the AT determines whether to decrease the service rate based on the corresponding rate drop probability. If the reverse link of the AT has multiple soft handover legs, the AT employs the "or" logic for the received RABs. That is, the AT decreases the rate according to requirements of the branch. Resources are reestablished and all the connections on this carrier are released if the value of RABLength is modified.



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8.2.4 RAB Offset (RABOFFSET)

Description This parameter specifies the number of timeslots occupied for RAB transmission that is determined together with RABLength (number of timeslots occupied for RAB transmission). This parameter is effective for EV-DO Rel. 0 systems only. The transmission timeslot of the AT = RABOffset*RABLength / 8.

Type Ordinary air interface parameter of the carrier level, transmitted in the RABOffset domain of TrafficChannelAssignment Message.


LST DORRMP

Value Range 0 to 7.

Default Value Allocate different values for neighboring sectors (default value: 0)

Setting Tradeoff In the EV-DO Rel. 0 system, set different RAB offsets for neighboring sectors. This helps prevent the synchronous change of AT rate to decrease the dramatic change of system load (ROT) and transmission rate and increase system capacity and stability. This is because the loads of neighboring sectors are correlated, that is, if several sectors are overloaded, the loads of other sectors may decrease when the AT rate of a sector changes. If RABs of neighboring sectors are transmitted on the same timeslot offset, all the ATs of the sectors decrease rate. Therefore, many sectors do not overload synchronously. If all ATs of the sectors increase rate, many sectors are overloaded again. In this case, loads of sectors change dramatically and the system performance degrades.

Remarks Resources are reestablished and all the connections on this carrier are released if the value of RABOffset is modified. The EV-DO Rev. A system no longer uses RABLength and RABOffset.

8.2.5 RA Channel Gain (RACGAIN)

Description This parameter specifies the gain of the reverse activity channel (RAC).



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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 high value, the demodulation correctness of the RA channel is improved. But the reverse load increases while the reverse capacity decreases.

Remarks None.

8.2.6 Reverse Limited Rate

Description This parameter specifies the probability of AT rate changing from X kbit/s to Y kbit/s. This indicates the probability that the AT rate increases or decreases to Y from the current rate X. The AT determines whether to increase or decrease rate according to the RAB transmitted by the AN. When the RAB is set to 1, the AT decreases the rate. When the RAB is set to 0, the AT increases the rate. The reverse probability conversion is used for reverse scheduling in the EV-DO Rel. 0 system. This parameter is replaced by T2P algorithm for reverse scheduling in the EV-DO Rev. A system. The reverse rate transfer is applied during reverse scheduling in the EV-DO Rel. 0 system. In the EV-DO Rev. A system, the T2P algorithm instead of Reverse Limited Rate is used for reverse scheduling.

Type Air interface parameter of the BSC level. This parameter is defined in the RateParameters attribute table during configuration negotiation of the MAC protocol of the reverse traffic channel.

Related Commands MOD DOQoS

LST DOQoS



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Value Range 0 to 255 in the unit of 1/255.

Default Value

Table 8-1 Default values of conversion probability of reverse rate

Parameter Default Value in V2R3

Default Value in V3R6

Probability of the AT rate changing from 9.6 kbit/s to 19.2 kbit/s

48 128


16 64


8 16


8 8


16 8


16 16


32 32


255 255

Setting Tradeoff If the parameter is set to a higher value, the AT is more likely to adjust the rate each time it receives RABs. RABs are transmitted to all the ATs in a sector. Therefore, all the ATs in the sector may increase or decrease the rate at the same time, resulting in the dramatic change of sector load. If the parameter is set to a smaller value, the AT is less likely to adjust the rate when it receives RABs. Therefore, the load control may be delayed and the AT cannot respond to the request of adjusting the sector load in time.

Remarks The process of controlling the reverse AT rate is as follows: If the last received RAB of any sector in the AT active set is set to 1, the AT sets CombinedBusyBit to 1. Otherwise, the AT sets CombinedBusyBit to 0. CurrentRate is set to the data transmission rate of the AT just before the new transmission is performed. If the AT does not transmit data before the new transmission is performed, the AT sets CurrentRate to 0. The AT sets the variable value of MaxRate based on the current transmission rate, a random number, and CombinedBusyBit value. The AT generates random number x (0 < x < 1) that is distributed equally. The AT determines whether conditions listed in Table 8-2 are met based on values of CurrentRate,



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CombinedBusyBit, and Condition. If such conditions can be met, the AT sets MaxRate with the MaxRateTrue value in the corresponding line in Table 5-1. If such conditions cannot be met, the AT sets MaxRate with the MaxRateFalse value in the corresponding line in Table 5-1. Except being affected by the preceding factors, the reverse AT rate is also restricted by the rate and AT Tx.

Table 8-2 Conditions

8.3 EV-DO Rev. A Forward Admission Control Parameters 8.3.1 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 forward admission control is enabled.


Related Commands MOD DOAFLCP

LST DORRMP




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Default Value ON.


Remarks None.

8.3.2 Max. Vip Number (MAXVIPNUM)

Description This parameter specifies the maximum number of private line users allowed on a carrier.



LST DORRMP


Default Value 10.

Setting Tradeoff If the parameter is set to a very high value, the throughput of other non-private line users is seriously affected, and the system performance is also affected.

Remarks When a private line user needs to set up a connection, if the number of private line users on the carrier reaches the maximum, the call cannot be accessed. If the number does not reach the maximum, the call can be accessed. The private line users enjoy the highest access priority. If the current reverse load is high, the access of private line users may result in the decrease of service quality for other users. In this case, perform load control.



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8.3.3 Max. Bandwidth of EF Flow (MAXEFFLOWBW)

Description This parameter specifies the Abis admission control over the EF flow. This parameter specifies the maximum bandwidth that EF flow can occupy. The total bandwidth occupied by all EF flow cannot exceed this parameter. Otherwise, EF flow is not admitted.



LST DORRMP

Value Range 0 to 3,072,000 (unit: bit/s).

Default Value 2,150,400.

Setting Tradeoff If the parameter is set to a very small value, fewer EF flow are admitted and some available bandwidth of the system is wasted if any bandwidth exists. If the parameter is set to a very high value, the admission control function is weakened, thus affecting the QoS satisfaction of users.

Remarks If the bandwidth of EF flow is set to the maximum value, the static-bandwidth-based admission control is disabled. This parameter is used for admission control over the EF flow.

8.3.4 Max. Bandwidth of EF and AF Flow (MAXEFAFFLOWBW)

Description This parameter specifies the admission control over the AF flow. This parameter specifies the total bandwidth that EF flow and AF flow can occupy. The total bandwidth occupied by all EF flow and AF flow cannot exceed this parameter.




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LST DORRMP

Value Range 0 to 3,072,000 (unit: bit/s).

Default Value 2,150,400.

Setting Tradeoff If the parameter is set to a very small value, the QoS satisfaction of users is affected and some available bandwidth of the system is wasted if any bandwidth exists. If the parameter is set to a very high value, the admission control function is weakened, thus affecting the QoS satisfaction of users.

Remarks If the bandwidth of EF flow and AF flow is set to the maximum value, the static-bandwidth-based admission control is disabled. This parameter is used for admission control over the AF flow.

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

Description This parameter specifies the maximum timeslot occupancy ratio of the EF flow during admission control. The total number of timeslots occupied by the EF flow cannot exceed the value of "Measurement period x Maximum timeslot occupancy ratio of the EF flow". Timeslot occupancy ratio of a flow = Number of timeslots required for transmitting data of this flow in the measurement period / Total number of timeslots in the measurement period.



LST DORRMP

Value Range 0 to 10,000 (unit: 0.01%).

Default Value 10,000 (that is, 100%).



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Setting Tradeoff If the parameter is set to a very small value, fewer EF flow are admitted and system resources are wasted, thus affecting the system throughput. If the parameter is set to a very high value, the admission control function is weakened, thus affecting the QoS satisfaction of users.

Remarks If the parameter is set to the maximum value, the admission control based on the timeslot occupancy ratio is disabled. This parameter is used for admission control over the EF flow. The total timeslot occupancy ratio of all the EF flow and AF flow can be used to measure the forward load of a carrier.

8.3.6 Max. Slots Occupancy Ratio of EF and AF Flow (MAXEFAFSLTOCCU)

Description This parameter specifies the maximum total timeslot occupancy ratio of EF flow and AF flow during admission control. The total number of timeslots occupied by EF flow and AF flow cannot exceed the value of "Measurement period x Maximum timeslot occupancy ratio of EF flow and AF flow".



LST DORRMP

Value Range 0 to 10,000 (unit: 0.01%).

Default Value 10,000 (that is, 100%).

Setting Tradeoff If the parameter is set to a very small value, fewer AF flow are admitted and system resources are wasted, thus affecting the system throughput. If this parameter is set to a very high value, the admission control function is weakened, thus affecting the QoS satisfaction of users.

Remarks If the parameter is set to the maximum value, the admission control based on the timeslot occupancy ratio is disabled. This parameter is used for admission control over the AF flow.



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8.3.7 Abis BE Flow Traffic Bandwidth Threshold (ABISBETRFBWTHR)

Description This parameter specifies the admission threshold of the Abis BE service bandwidth. This parameter specifies the minimum Abis bandwidth required by the BE service. If the Abis bandwidth allocated for BE users is smaller than this value, BE users cannot access the system.

Type Parameter of the BTS level.

Related Commands MOD BSCBTSINF

LST BSCBTSINF

Value Range 0 to 3,072 (unit of kbit/s).

Default Value 0.

Setting Tradeoff If the parameter is set to a smaller value, more users are admitted by the BTS. The experience of a single user, however, may be affected because of the very low Abis bandwidth that is allocated. If the parameter is set to a higher value, fewer users are admitted, but the user experience of a single user is better.

Remarks If this parameter is set to 0, this indicates that the Abis bandwidth admission is not performed for BE services.

8.3.8 Admission Control Access Switch of BE Flow (ADMISSIONCTRLSWITCH)

Description This parameter specifies the admission control function based on the equivalent rate of users.

Type Parameter of the carrier level.



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LST DORRMP


Default Value OFF.


Remarks Measure loads according to the equivalent rate of users. The time during which users do not transmit data is excluded from the valid transmission time. The low average equivalent rate of users in a sector indicates high system load. New users need to be restricted from accessing the sector. If the Load Control Switch of BE Flow is enabled, the Admission Control Access Switch of BE Flow must also be enabled.

8.3.9 Load Control Switch of BE Flow (LOADCTRLSWITCH)

Description This parameter specifies the load control function based on the equivalent rate of users.



LST DORRMP






163

Remarks Measure loads according to the equivalent rate of users. The time during which users do not transmit data is excluded from the valid transmission time. The low average equivalent rate of users in a sector indicates high system load. New users need to be restricted from accessing the sector or users with poor radio environment need to be released. If the Load Control Switch of BE Flow is enabled, the Admission Control Access Switch of BE Flow must also be enabled.

8.3.10 Bass User Number Offset of BE Flow (USERBASSNUM)

Description When functions of admission and load control based on the equivalent rate of users are enabled, if the number of users on a carrier is lower than this threshold, no user is restricted from accessing this carrier. If the number of users on a carrier is higher than the threshold of Bass User Number Offset of BE Flow, determine whether users can access the carrier according to the equivalent rate.



LST DORRMP


Default Value 5.

Setting Tradeoff If the parameter is set to a very small value, after a few remote users access the carrier, other users cannot access the carrier due to very low average rate. If the parameter is set to a very high value, even though the average rate of users on this sector carrier is low, admission control cannot be implemented because the user number is lower than this parameter value.

Remarks Measure loads according to the equivalent rate of users. The time during which users do not transmit data is excluded from the valid transmission time. The low average equivalent rate of users in a sector indicates high system load. This parameter functions as the decision condition for functions of admission and load control.

If the number of users on a carrier is higher than the Bass User Number Offset of BE Flow, and the equivalent rate of the carrier is within the range between TH2 Speed Threshold of



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BE Flow and TH1 Speed Threshold of BE Flow, users with poor radio environment are restricted from accessing the carrier.

If the number of users on a carrier is higher than the number of (Bass User Number Offset of BE Flow + offset of number of admission-rejected users), and the equivalent rate of the sector carrier is within the range between TH3 Speed Threshold of BE Flow and rate threshold TH2 of BE flow, all users are restricted from accessing the carrier.

If the number of users on the carrier is higher than the number of (Bass User Number Offset of BE Flow + Delete Access Number Offset beta of BE Flow), and the equivalent rate of the sector carrier is lower than the TH3 Speed Threshold of BE Flow, the user with the poorest radio environment on this carrier is released.

8.3.11 Refuse Access Number Offset of BE Flow (REFUSEUSERNUMOFFSET)

Description This parameter specifies the decision condition for admission control after functions of admission and load control based on the equivalent rate of users are enabled.



LST DORRMP


Default Value 5.

Setting Tradeoff If the parameter is set to a very small value, after a few remote users access the carrier, other users cannot access the carrier due to very low average rate. If the parameter is set to a very high value, even though the average rate of users on this sector carrier is low, admission control cannot be implemented because the user number does not meet the condition.

Remarks For details, refer to the remarks of USERBASSNUM.



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8.3.12 Delete Access Number Offset beta of BE Flow (DELETEUSERNUMOFFSET)

Description This parameter specifies the decision condition for load control after functions of admission and load control based on the equivalent rate of users are enabled.



LST DORRMP


Default Value 10.

Setting Tradeoff If the parameter is set to a very small value, after a few remote users access the carrier, the average rate is very low and the user number is insufficient, thus affecting the system capacity. If the parameter is set to a very high value, even though the average rate of users on this sector carrier is low, load control cannot be implemented and the rate for user experience is low because the user number does not meet the condition.


8.3.13 TH1 Speed Threshold of BE Flow (RATETH1)

Description This parameter specifies the forward admission control of BE flow. When the average rate of the carrier is lower than this rate threshold, restrict users with poor radio environment from accessing the carrier considering the current number of users. Users with good radio environment can still access the carrier.




166


LST DORRMP

Value Range 0 to 3,072 (unit: kbit/s).

Default Value 71.

Setting Tradeoff If the parameter is set to a very small value, the average equivalent rate of users in the system is low. If the parameter is set to a very high value, there may be a loss of system capacity even though the rate of accessed users can be ensured. When the average equivalent rate of users is lower than this value, determine whether to restrict users with poor radio environment from accessing the carrier. The following condition must be met: TH1 Speed Threshold of BE Flow > TH2 Speed Threshold of BE Flow > TH3 Speed Threshold of BE Flow.



Description This parameter specifies the forward admission control of BE flow. When the average rate of the carrier is lower than this rate threshold, restrict all new users from accessing the carrier considering the current number of users.



LST DORRMP


Default Value 43.



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Setting Tradeoff If the parameter is set to a very small value, the average equivalent rate of users in the system is low. If the parameter is set to a very high value, loss of system capacity may be generated even though the rate of accessed users can be ensured. When the average equivalent rate of users is lower than this value, determine whether to restrict all users from accessing the carrier. The following condition must be met: TH1 Speed Threshold of BE Flow > TH2 Speed Threshold of BE Flow > TH3 Speed Threshold of BE Flow.



Description This parameter specifies the forward load control of the BE flow. When the average rate of the carrier is lower than this rate threshold, release users with poor radio environment considering the current number of users.



LST DORRMP


Default Value 23.

Setting Tradeoff If the parameter is set to a very small value, the average equivalent rate of users in the system is low. If the parameter is set to a very high value, loss of system capacity may be generated even though the rate of accessed users can be ensured. When the average equivalent rate of users is lower than this value, determine whether to release users with poor radio environment. The following condition must be met: TH1 Speed Threshold of BE Flow > TH2 Speed Threshold of BE Flow > TH3 Speed Threshold of BE Flow.




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8.3.16 Invalid Time Threshold of Exception Protection of BE Flow (INVALIDTIMER)

Description If services of a user are rejected by the system due to admission or load control, the user cannot access the system within the period set by this parameter.



LST DORRMP

Value Range 1 to 4,500 (unit: ms).

Default Value 80.

Setting Tradeoff If the system load is high, you can set this parameter to a high value to prevent frequent accesses.

Remarks None.

8.3.17 IIR Parameter alpha of BE Flow (IIRPARAMETER)

Description This parameter specifies the first-order filtering of average equivalent rate of users that is calculated by the system in real time.



LST DORRMP



169

Value Range 1 to 10 (unit: 0.1).

Default Value 5.

Setting Tradeoff If this parameter is set to a high value, it indicates that the current value occupies a large proportion and the real-time performance is good. If this parameter is set to a small value, it indicates that the historical value takes a large proportion and the stability is good.

Remarks AvgR(n) = (1 – α) AvgR(n – 1) + αAvgR(n)

8.3.18 Radio Environment Scale Threshold (ENVSCALETHD)

Description This parameter specifies the threshold of radio environment cannot be lower than the admission threshold of this parameter when the current forward load reaches a certain level. This can improve the timeslot occupancy ratio of the air interface.



LST DOGP


Default Value –28.

Setting Tradeoff If the parameter is set to a very small value, the timeslot occupancy ratio of the air interface is decreased, thus affecting the user experience. If the parameter is set to a very high value, users with good radio environment cannot access the system.

Remarks None.



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8.4 EV-DO Reverse Load Control Parameters For the BTS3606 (using the chip-5800 channel board) and BTS3900 (using the chip-6800 channel board), you can run the MOD DORLCP command to modify the reverse load control parameters.

8.4.1 Reverse Active Bit Decision Algorithm (RADESNALG)

Description This parameter specifies the RAB decision according to load measurement methods during reverse load control.


Related Commands MOD DORLCP

LST DORRMP

Value Range The drop-down menu of the maintenance console provides the following 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, and the RSSI is overloaded, this algorithm is used to decide overload.

Default Value ALG0 (decide overload according to RoT only)

Setting Tradeoff It is recommended that you do not change the value of this parameter.



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RemarksLoad is calculated by the CSM chip on the EV-DO channel board of the BTS according to the number of reverse activity users, reverse rate, and strength of received signals. Theoretically, RoT and Load are equivalent. Load represented by Load, however, is less accurate than the load represented by RoT due to frequent change of radio environment, various types of interferences, and attenuation. Therefore, generally, Load is not adopted.

\

\

8.4.2 Reverse Link Silence Duration (RLSDURATION)

Description This parameter specifies the duration of the silence interval on reverse links. The value of this parameter indicates the number of frames between two Silence Intervals on the reverse link.

Type Ordinary air interface parameter of the carrier level, carried in the SectorParameters message.


LST DOSPM

Value Range 0 to 3 (unit: frame).

Default Value 3.

Setting Tradeoff If the parameter is set to a very small value, the AN fails to precisely measure thermal noise, thus affecting the accuracy of RoT. If the parameter is set to a very high value, the reverse throughput and access delay are affected.

Remarks When the background noise estimation algorithm adopts the silence period mode, settings of the silence period parameter of the AT must be consistent with the settings of the BTS.



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8.4.3 Reverse Link Silence Period (RLSPERIOD)

Description This parameter specifies the silence period of reverse links. It represents the period for transmitting the information of the silence interval on the reverse link. If the system time (T) meets the formula Tmod,

(2048 x 2Reverse Link Silence Period – 1) = 0, the T (unit: frame) is regarded as a new period.

Type Ordinary air interface parameter of the carrier level, carried in the SectorParameters message.


LST DOSPM

Value Range 0 to 3

Default Value 2

Setting Tradeoff If the parameter is set to a very small value, the reverse throughput and access delay are affected. If the parameter is set to a very high value, the AN slowly updates the background noise.

Remarks None.

8.4.4 RAB Threshold (RABTHR)

Description This parameter is used to set the ROT threshold of the RA bit when QRABSRCTP is set to BASEONROT. The ROT obtained by each timeslot of the channel board is compared with this threshold. If the ROT is higher than the threshold, set the RA bit of the subframe to 1, which indicates that the sector is busy; if the ROT is lower than the threshold, set the RA bit of the subframe to –1, which indicates that the sector is idle.




173

Related Commands MOD DOARLCP

LST DORRMP


Default Value 23.

Setting Tradeoff If the parameter is set to a very small value, the reverse throughput is limited in the case that load control is enabled. If the parameter is set to a very high value, load control cannot be enabled in time, and thus the system may break down.5.75 dB is recommended by Qualcomm for this threshold.

The default value cannot be used universally. Set the parameter to proper value according to the actual load and radio environment of the current network.

Remarks In the case that QRABSRCTP is set to BASEONROT, if RABTHR is set to the default value, the reverse throughput of the sector is decreased. Thus, if the repeater without receive diversity is used, the recommended value is 23; if the repeater with receive diversity is used, the recommended value is 32.

8.5 EV-DO Rev. A Reverse Admission and Load Control Parameters

The following parameters are used only during connection setup (setup of the main stream). During the setup of an assisting stream or during a soft handoff, the admission and load control described in the follow sections should not be performed.

8.5.1 Reverse Admission Control Switch of BE Flow (RVSADDMITIONSW)

Description This parameter specifies the switch for reverse admission algorithm. This parameter decides whether to enable the reverse admission function of BE users on the current carrier. When the reverse load exceeds the specified threshold, new users cannot access the carrier.




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LST DORRMP


Default Value OFF.


Remarks The reverse admission algorithm of BE flow specifies the load threshold according to the reverse load (ratio of busy/idle RABs on the carrier) and T2P resources obtained by users. When the reverse load of the carrier exceeds the threshold, new users cannot access the carrier. This ensures that the accessed users can obtain sufficient reverse T2P resources and better service quality. If the Reverse Load Control Algorithm Switch of BE Flow is enabled, the Reverse Admission Control Switch of BE Flow must also be enabled.

8.5.2 Reverse Load Control Algorithm Switch of BE Flow (RVSLOADSW)

Description This parameter specifies the reverse load control enabled on the current carrier. When the reverse load reaches the specified threshold, some users are released actively. This ensures stable reverse load of the system and prevents system breakdown.



LST DORRMP


Default Value OFF.



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Remarks The reverse load of the EV-DO system is affected by the user number and interference from neighboring cells. The interference signals may cause the increase of carrier load. When the carrier load is very high, throughputs of all users in the sector are dramatically decreased but the Tx is still high. In this case, some users are released actively. This improves the sector stability and prevents system breakdown. If the Reverse Load Control Algorithm Switch of BE Flow is enabled, the Reverse Admission Control Switch of BE Flow must also be enabled.

8.5.3 Algorithm Selection Switch of BE Flow (ALGORITHMSW)

Description This parameter determines whether the reverse load admission is performed on the basis of the rate of a BE subscriber. It is used when RVSADDMITIONSW is set to ON.



LST DORRMP



Setting Tradeoff When applications of a carrier are BE services such as FTP or HTTP, the switch needs to be set to OFF. When applications of the carrier are EF services such as VoIP or VT, the switch needs to be set to ON.

Remarks The T2P resources obtained by the BE service and EF service are different because of the change in the reverse load. In addition, admission control cannot be implemented by using the same load threshold. Hence, admission and load control thresholds are set in the system. When the BE service is the main service in the system, set the admission and load thresholds as required by the BE service, that is, set this switch to OFF. When the EF service is the main



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service in the system, set the admission and load thresholds as required by the EF service, that is, set this switch to ON.

8.5.4 BE Reverse Admission Threshold of BE Flow (RVSTHDBE)

Description When RVSADDMITIONSW is set to ON and ALGORITHMSW are set to OFF, and when log(b/(1-b)) exceeds the value of RVSTHDBE, the admission is not allowed.



LST DORRMP


Default Value 93.

Setting Tradeoff When the parameter is set to a small value, if the load threshold required by admission is low, the rate enjoyed by accessed users can be improved, but fewer users can access the sector. When the parameter is set to a high value, if the load threshold required by admission is high, the rate enjoyed by accessed users is reduced, but more users can access the sector.

Remarks This threshold must be lower than the BE Reverse Remove Threshold of BE Flow.

8.5.5 EF Reverse Admission Threshold of BE Flow (RVSTHDEF)

Description The admission is not allowed under the following conditions: when RVSADDMITIONSW and ALGORITHMSW are set to ON, when the ratio of number of ROTs greater than 7 dB to number of total ROTs exceeds the value of RVSTHDBE, and when log(b/(1-b)) is higher than the value of RVSTHDNOELARES.




177


LST DORRMP

Value Range 0% to 100%.

Default Value 1%.

Setting Tradeoff If the parameter is set to a small value, quality of the EF service can be ensured, but fewer users can access the sector. If the parameter is set to a high value, quality of the EF service cannot be ensured, but more users can access the sector.

Remarks The admission threshold of the EF service is used when such service is the main service in a sector. In the case of high system load, the EF service can ensure the allocation of T2P resources. Therefore, there is no need to use the load threshold. The sector capacity threshold (probability that RoT of the sector is larger than 7 dB does not exceed 1%) is used as the admission threshold. This threshold along with No Elastic Resource EF Reverse Admission Threshold of BE Flow is used for admission decision.

8.5.6 No Elastic Resource EF Reverse Admission Threshold of BE Flow (RVSTHDNOELARES)

Description The admission is not allowed under the following conditions: when RVSADDMITIONSW and ALGORITHMSW are set to ON, when the ratio of number of ROTs greater than 7 dB to number of total ROTs exceeds the value of RVSTHDEF, and when log(b/(1-b)) is higher than the value of RVSTHDNOELARES.



LST DORRMP

Value Range –100 to +300 (unit: 0.1 dB).



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Default Value 100.


Remarks The admission threshold of the EF service is used when such service is the main service in a sector. A few BE service users, however, can make the RoT of the sector reach the sector capacity threshold (probability that RoT of the sector is larger than 7 dB does not exceed 1%) of the EF service in a short term. Therefore, the admission may be determined incorrectly. To prevent this, when using the EF capacity threshold, you also need to determine the current reverse load of the sector. Ensure that no valid BE service is available at this time so that the access of new users is rejected.

8.5.7 BE Reverse Remove Threshold of BE Flow (RVSREMTHDBE)

Description This parameter is used to set the threshold for deleting a subscriber when RVSADDMITIONSW and RVSLOADSW are set to ON and ALGORITHMSW is set to OFF. When the system load reaches this threshold, the subscriber deletion (the subscriber with a high reverse PER is to be deleted first) is enabled. The system load is measured by log(b/(1-b)).



LST DORRMP

Value Range –100 to +300 (unit: 0.1 dB).

Default Value 100.

Setting Tradeoff Generally, this parameter is set to the corresponding reverse load when no T2P resource is available for the BE service.



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Remarks This threshold must be larger than the BE Reverse Remove Threshold of BE Flow. When a DOA call has multiple legs, if the cause value reported by the BTS on one branch that is carried in Abis-DO BTS Release Request is " release users after DOA reverse load control is performed ", the call needs to be released.

8.5.8 EF Reverse Remove Threshold of BE Flow (RVSREMTHDEF)

Description This parameter is used to set the threshold for deleting a subscriber when RVSADDMITIONSW, RVSLOADSW, and ALGORITHMSW are set to ON. When the system load reaches this threshold, the deletion algorithm (the subscriber with a high reverse PER is to be deleted first) is enabled. The system load is measured by log(b/(1-b)).



LST DORRMP


Default Value 270.

Setting Tradeoff Generally, this parameter is set to the corresponding reverse load when no T2P resource is available for the EF service.

Remarks This threshold must be larger than the EF Reverse Remove Threshold of BE Flow.

8.5.9 Reverse Load Measure Period of BE Flow (RVSLOADMEASPRD)

Description This parameter specifies the period for the BTS to measure the reverse load (b/(1-b), that is, the RAB busy/idle ratio under carriers).



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LST DORRMP

Value Range 0 to 100 (unit: s)

Default Value 1.

Setting Tradeoff If this parameter is set to a great value, the period for the BTS to measure the reverse load is excessively long, and thus the changes of the reverse load cannot be reflected in time. If this parameter is set to a small value, few sampling points are measured, and thus the load reflection is inaccurate.

Remarks In the access algorithm, the reverse load is measured on the basis of the RAB busy/idle ratio under carriers. The ratio is applicable only in a data sampling period. Therefore, the BSC delivers a sampling period to the BTS to specify the sampling period for the reverse load.

8.5.10 Reverse Access Control Switch (RVSACSCTRLSWT)

Description This parameter specifies the reverse access control switch. If the switch is turned on, the reverse access function is enabled.



DSP CBTSCFG

Value Range ON, or OFF



181

Default Value OFF


Remarks This parameter is supported only in the versions later than V300R002.

8.6 Access Channel Load Control Parameters 8.6.1 Access Channel Load Control Algorithmic Switch (ACCCHLDCTRLSW)

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



LST DORRMP

Value Range OFF;

OCCU (by occupancy ratio);

OCCUCOLLS (by occupancy ratio and collision ratio).

Default Value OFF.




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Remarks The measured collision ratio may 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.

8.6.2 Access Channels Collision Threshold (ACHCOLLTHD)

Description This parameter specifies the collision ratio threshold of access channels. The access capsule that has strong signal strength but fails to be demodulated regards that collision occurs.



DSP CBTSCFG


Default Value 3000





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9 Forward Scheduling Parameters

9.1 Forward Scheduling Parameters 9.1.1 QoS Category (QOSCATEG)

Description This parameter specifies the flow QoS category, that is, delay-sensitive (DS) or throughput-sensitive (TS). The chips select different calculation formulas according to the flow attributes when calculating the scheduling priorities.

Type Chip scheduler parameter of the system level.

Related Commands MOD DOFSP

LST DOFSP

Value Range TS, or DS

Default Value See 错误！未找到引用源。.

Setting Tradeoff You can select DS or TS according to the service type.

Remarks None.



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9.1.2 Metric State (METRICSTATE)

Description This parameter specifies the initial scheduling level of flow. Various service types have various QoS requirements, and you can ensure the service priority difference by setting different MC priority factors for different services. The priority calculated by the scheduler is expressed in the following Metric polynomial. MC7 > MC6 > MC5 > MC4 > MC3 > MC2 > MC0 (MC0 …, and MC7 are metric factors). The scheduler schedules the packet with the highest priority. When comparing the priorities, the scheduler uses the polynomial calculation method, that is, the packet with a larger METRICSTATE has a higher priority. If two packets are of the same METRICSTATE, the scheduler compares the TSBSM or the DSBSM.

For TS services:

For DS services:



LST DOFSP

Value Range 0 to 7


Setting Tradeoff Different service types have different QoS requirements. You can ensure service priority differences by setting different METRICSTATEs. The flow of the service type with a larger METRICSTATE is more likely to be scheduled. The flow of the service type with a smaller METRICSTATE is less likely to be scheduled.



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Remarks None.

9.1.3 Delay BoundIn Slots (DELAYBOUNDINSLT)

Description This parameter specifies the maximum delay of DS service flow. If this parameter is set to 0, the delay is not restricted. When the delay of the DS service flow data exceeds the DELAYBOUNDINSLT, the scheduler directly discards the data.



LST DOFSP

Value Range 0 to 3900 (slot)


Setting Tradeoff For DS services, the value of this parameter cannot be set to 0. In addition, if the parameter is set to a small value, packets may be discarded due to timeout when many subscribers use DS service flow. Thus, the QoS is reduced. Therefore, you should try to improve the value of this parameter within the range that is accepted by the DS.

Remarks For the services (such as the VOIP) with certain delay requirements, the terminal directly discards the data when receiving the data after a delay longer than the delay requirements. For BE services, this parameter is set to 0. That is, the delay is not restricted.

9.1.4 Delay Threshold 1 (DELAYTHRLD1)

Description This parameter specifies the threshold parameter of the algorithm that schedules priority transient. The parameter is used for real-time services. The algorithm adjusts the priority level MC according to the data delay, thus ensuring that the data with a longer delay can be scheduled first. The BSM or BM priority is calculated as follows:



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If the current delay of the byte is smaller than DELAYTHRLD1, set the priority of the byte to METRICSTATE.

If the current delay of the byte is not smaller than DELAYTHRLD1 and smaller than DELAYTHRLD2, set the priority of the byte to DELAYMETRICSTATE1.

If the current delay of the byte is not smaller than DELAYTHRLD2, set the priority of the byte to DELAYMETRICSTATE2.



LST DOFSP

Value Range 0 to 60000 (slot) (The value "0" indicates that the parameter is invalid).


Setting Tradeoff The priority of the service with a smaller DELAYTHRLD1 is more likely to be improved. In this case, real-time services differ from non-realtime services to a great extent.

Remarks Data is treated differently according to the delay differentiated on the basis of DELAYTHRLD1, DELAYTHRLD2, and DELAYBOUNDINSLT. If the delay is small, a low priority is used. Thus, non-realtime services and real-time services have the same opportunity to be scheduled. If DS services wait for a very long time, the scheduling level of the services is improved. Thus, the DS service flow is sent immediately, and the services meet the QoS requirements. If the waiting time of the DS service flow exceeds the DELAYBOUNDINSLT, the data is discarded directly, thus preventing invalid data from occupying air interfaces. Under the default configuration, the scheduling priority transient algorithm cannot be used.

9.1.5 Delay Threshold 2 (DELAYTHRLD2)

Description This parameter specifies the threshold parameter of the algorithm that schedules priority transient. For details, see DELAYTHRLD1.




187


LST DOFSP

Value Range 0 to 60000 (slot) (The value "0" indicates that the parameter is invalid)


Setting Tradeoff The priority of the service with a smaller DELAYTHRLD2 is more likely to be improved. In this case, real-time services differ from non-realtime services to a great extent.

Remarks Under the default configuration, the scheduling priority transient algorithm cannot be used.

9.1.6 Delay Level 1 (DELAYMETRICSTATE1)

Description This parameter specifies the threshold parameter of the algorithm that schedules priority transient. For details, refer to DELAYTHRLD1.



LST DOFSP

Value Range 0 to 7


Setting Tradeoff The service with a higher delay level is more likely to be scheduled. If the delay level is excessively high, non-realtime services of the subscribers that use hybrid services are affected.



188

To realize the optimal resource utilization, you should set this parameter to the value that can just meet the delay requirements of real-time services.


9.1.7 Delay Level 2 (DELAYMETRICSTATE2)

Description This parameter specifies the threshold parameter of the algorithm that schedules priority transient. For details, see DELAYTHRLD1.



LST DOFSP

Value Range 0 to 7


Setting Tradeoff The service with a higher delay level is more likely to be scheduled. If the delay level is excessively high, non-realtime services of the subscribers that use hybrid services are affected. To realize the optimal resource utilization, you should set this parameter to the value that can just meet the delay requirements of real-time services.


9.1.8 Acceleration Offset (ACCLRTOFFSET)

Description This parameter is used to set the scheduling weight factor (AccelerationOffset) in the formula for calculating the BSM priority of DS flow. The parameter is valid for DS services only, and it affects the sequence for the byte flow to enter candidate transmission instances. If two queues are with the same level, the byte flow in the queue with a larger AccelerationOffset first enters candidate transmission instances.



189



LST DOFSP

Value Range 0 to 5


Setting Tradeoff This parameter adjusts the priority of the service scheduling. The service with a higher ACCLRTOFFSET is more likely to be scheduled. Therefore, you must consider all services when setting this parameter.

Remarks The BSM priority of DS services is calculated on the basis of the following formula:

The "CurrentDelay" in the preceding formula is the byte delay calculated by the scheduler. The "AccelerationFactor" must match with DELAYBOUNDINSLT. AccelerationFactor is set by chips instead of subscribers.

9.1.9 DRC Erasure Delay Threshold (DRCERASDELAYTHRLD)

Description This parameter specifies the matching threshold. It is used for the DRC erasure matching algorithm.



LST DOFSP



190

Value Range 0 to 15 (The value "0" indicates that the DRC erasure matching algorithm is not enabled.)



Remarks If the scheduler cannot demodulate the DRC value, DRC erasure occurs. In the EV-DO Rel. 0 system, the AN does not schedule the subscribers with DRC erasure. In this case, non-DS services are not affected. In the EV-DO Rev. A system, real-time services have high delay requirements. To prevent DRC erasure from affecting scheduling, you can use the DRC erasure matching algorithm.

Each data flow of the AT is scheduled after entering multi-subscriber transmission instances if it meets the following condition.



191

The "HeadofQueueDelay" in the preceding formula indicates the longest data waiting time in a queue. When the DRC erasure matching algorithm is used and the preceding condition is met, the DRC erasure data is scheduled by using the DRC_index_store.

9.1.10 Fwd Link Delayed ARQ Enabled (FWDDARQENABLED)

Description This parameter specifies the allowed identifier for the forward delay automatic retransmission request (DARQ). The DARQ indicates the retransmission queue on the MAC layer. This parameter determines whether to enable the retransmission function of the MAC layer.



LST DOFSP

Value Range NO (not allowed), or YES (allowed)


Setting Tradeoff In the case that the DARQ is enabled, the retransmission on the MAC layer can prevent any error from accessing an upper layer. In this way, the reliability of the retransmission over the air interface is improved, and thus the forward transmission rate over the air interface is increased.

Remarks None.

9.1.11 DS Bit Metric Value (DSBITMETRIC)

Description This parameter is configured for comparing the packet priorities between DS flows. As a priority adjustment measure, this parameter can be used to set the same priority for different-grade subscribers of the same traffic service or to set different priorities for the same subscriber in different traffic service.




192


LST DOFSP




Remarks This parameter is the AccelerationFactor in the formula for calculating the priorities of DS flow.

9.1.12 Um Schedule Mode of BE Flow (SCHEDULEMODE)

Description Air interface scheduling policies for BE flow.



LST DORRMP

Value Range SFEP (slot fair and efficiency policy)

MSTM (throughput maximization policy)

URSICA (zone rate stabilizing policy)

Default Value SFEP



193

Setting Tradeoff The SFEP policy is the default method for the products of V3R6 or earlier. You can classify the priorities of the subscribers with different levels under the same radio environment by setting the GosFactor parameter. The MSTM policy enables the subscribers in good radio environment to obtain more opportunities to be scheduled. Thus, the throughput of the related sector is improved. The URSICA policy ensures the rate stability for the subscribers in a specified zone and the absolute rate differences between subscribers of different levels in that zone.

Remarks When using the SFEP, you should run the MOD DOFSP command instead of the MOD DOAFLCP command to change the GosFactor parameter.

9.1.13 Threshold of Good Radio_Environment Threshold (DRCGOODTH)

Description This parameter is used when SCHEDULEMODE is set to MSTM. The radio environments are divided into three zones according to DRCGOODTH and DRCBADTH, and different GF values are set for subscribers of different grades. Thus, the subscribers in good radio environments obtain more opportunities to be scheduled.



LST DORRMP

Value Range 2 to 30719 (unit: 100 bit/s)

Default Value 12288

Setting Tradeoff The MSTM policy aims at ensuring that subscribers in good environment receive more opportunities to be scheduled, thus improving the throughput of the entire sector.

Remarks None.



194

9.1.14 Threshold of Bad Radio_Environment Threshold (DRCBADTH)

Description This parameter is used when SCHEDULEMODE is set to MSTM. The radio environments are divided into three zones according to DRCGOODTH and DRCBADTH, and different GF values are set for subscribers of different grades. Thus, the subscribers in good radio environments obtain more opportunities to be scheduled.



LST DORRMP

Value Range 1 to 30718 (unit: 100 bit/s)

Default Value 3072

Setting Tradeoff The MSTM policy aims at ensuring that subscribers in good environment receive more opportunities to be scheduled, thus improving the throughput of the entire sector.

Remarks None.



195

9.1.15 Gos Factor Of Gold Subscriber In Good Radio Environment District (DRCGOODGOLDGOSFACTOR)/Gos Factor Of Silver Subscriber In Good Radio Environment District (DRCGOODSILVERGOSFACTOR)/Gos Factor Of Bronze Subscriber In Good Radio Environment District (DRCGOODBRONZEGOSFACTOR)/Gos Factor Of Gold Subscriber In Middle Radio Environment District (DRCMIDGOLDGOSFACTOR)/Gos Factor Of Silver Subscriber In Middle Radio Environment District (DRCMIDSILVERGOSFACTOR)/Gos Factor Of Bronze Subscriber In Middle Radio Environment District (DRCMIDBRONZEGOSFACTOR)/Gos Factor Of Gold Subscriber In Bad Radio Environment District (DRCBADGOLDGOSFACTOR)/Gos Factor Of Silver Subscriber In Bad Radio Environment District (DRCBADSILVERGOSFACTOR)/Gos Factor Of Bronze Subscriber In Bad Radio Environment District (DRCBADBRONZEGOSFACTOR)

Description These parameters are used when SCHEDULEMODE is set to MSTM. The radio environments are divided into three zones according to DRCGOODTH and DRCBADTH, and different GF values are set for subscribers of different grades in different zones. Thus, the subscribers in good radio environments obtain more opportunities to be scheduled.



LST DORRMP

Value Range 0 to 5.

Default Value 5.



196

Setting Tradeoff The MSTM policy aims at ensuring that subscribers in good environment receive more opportunities to be scheduled, thus improving the throughput of the entire sector. You can adjust the scheduling opportunities according to the division of radio environment.

Remarks For example, there are three subscribers whose levels are gold, silver, and bronze. The gold subscriber is in the zone with medium radio environment, the silver subscriber is in the zone with bad radio environment, and the bronze subscriber is in the zone with good radio environment. In this case, the GF proportion of the gold, silver, and bronze subscribers is 4:2:3, which reflects the scheduling opportunity proportion of the three subscribers. In other cases, you can refer to the following table.

DRC Application Value

GF Value for Gold Subscribers

GF Value for Silver Subscribers

GF Value for Bronze Subscribers

Good radio environment 5 4 3

Medium radio environment

4 3 2

Bad radio environment 3 2 1

9.1.16 Threshold of Radio Environment District Where Throughput To Be Ensured (THDRC)

Description This parameter specifies the threshold for guaranteeing the stable rate of the gold subscribers in the radio environment of which the quality is higher than the value of THDRC. It is used when SCHEDULEMODE is set to URSICA. The URSICA policy must be used with the subscriber peak rate limit function.



LST DORRMP

Value Range 4 to 30719 (unit: 100 bit/s).



197

Default Value 12288.

Setting Tradeoff If this parameter is set to a small value, the throughput of the related sector is severely affected. If this parameter is set to a great value, the guaranteed zone is very small.

Remarks The URSICA policy aims to enable the subscribers in a specified zone to obtain stable rates. The subscribers that reach the guaranteed rate give their redundant timeslots to the subscribers in bad radio environment, thus avoiding fast fading. The subscribers outside the guaranteed zone are configured with various scheduling priorities according to the radio environment quality and the subscriber grade.

Judge the radio environment quality based on the DRC applied by the subscribers.

9.1.17 Throughput of Gold Subscriber (GOLDTHROUGHPUT)

Description This parameter is used to set an appropriate rate for gold subscribers when SCHEDULEMODE is set to URSICA.



LST DORRMP


Default Value 5000.

Setting Tradeoff If this parameter is set to a great value, the rates of the subscribers in the sector are severely affected. The URSICA policy must be used with the subscriber peak rate limit function. It is recommended that the GOLDTHROUGHPUT does not exceed 500 kbit/s (GOLDTHROUGHPUT > SILVERTHROUGHPUT > BRONZETHROUGHPUT).



198

Remarks See the Guaranteed Zone Threshold (THDRC).

9.1.18 Throughput of Silver Subscriber (SILVERTHROUGHPUT)

Description This parameter is used to set the guarantee of the silver subscriber's rate when SCHEDULEMODE is set to URSICA.



LST DORRMP


Default Value 3000.

Setting Tradeoff If this parameter is set to a great value, the rates of the subscribers in the sector are severely affected. The URSICA policy must be used with the subscriber peak rate limit function. It is recommended that the SILVERTHROUGHPUT does not exceed 300 kbit/s (GOLDTHROUGHPUT > SILVERTHROUGHPUT > BRONZETHROUGHPUT).


9.1.19 Throughput Of Bronze Subscriber (BRONZETHROUGHPUT)

Description This parameter is used to set the guarantee of the bronze subscriber's rate when SCHEDULEMODE is set to URSICA.




199


LST DORRMP


Default Value 2000.

Setting Tradeoff If this parameter is set to a great value, the rates of the subscribers in the sector are severely affected. The URSICA policy must be used with the subscriber peak rate limit function. It is recommended that the value of BRONZETHROUGHPUT does not exceed 200 kbit/s (GOLDTHROUGHPUT > SILVERTHROUGHPUT > BRONZETHROUGHPUT).


9.1.20 Forward Limited Rate (FWDLMTRATE)

Description This parameter specifies the forward guaranteed rate (on the physical layer) of EV-DO Rev. A leased lines.


Related Commands MOD DOAQOS

LST DOAQOS

Value Range RATE9K6 (9.6 kbit/s), RATE19K2 (19.2 kbit/s), RATE38K4 (38.4 kbit/s), RATE76K88 (76.8 kbit/s), RATE153K6 (153.6 kbit/s), RATE307K2 (307.2 kbit/s), RATE614K4 (614.4 kbit/s), RATE1288K8 (1288.8 kbit/s), RATE2457K6 (2457.6 kbit/s), and RATE3702K0 (3702.0 kbit/s).

Default Value Leased line 1: 307.2 kbit/s.

Leased line 2: 153.6 kbit/s.



200


Setting Tradeoff This parameter restricts the forward rates of leased lines at various levels. The setting of this parameter is related to the operations schemes.

Remarks The BSC, instead of the PDSN, restricts the rate. The FWDLMTRATE is valid only when the QoS switch is on.

9.1.21 Grade Subscriber Forward Limited Rate (GRADEFWDLMTRATE)

Description This parameter specifies the maximum forward rate of the EV-DO Rel. 0 and EV-DO Rev. A subscribers at various levels and the forward guaranteed rate of EV-DO Rel. 0 leased lines.



LST DOQOS

Value Range FRATE488 (48.8 kbit/s), FRATE732 (73.2 kbit/s), FRATE1464 (146.4 kbit/s), FRATE2928 (292.8 kbit/s), FRATE5856 (585.6 kbit/s), FRATE8784 (878.4 kbit/s), FRATE11712 (1171.2 kbit/s), FRATE17568 (1756.8 kbit/s), and FRATE23424 (not limited).

Default Value Gold subscribers: FRATE23424 (not limited).

Silver subscribers: FRATE11712 (1171.2 kbit/s).

Bronze subscribers: FRATE5856 (585.6 kbit/s).




Setting Tradeoff The setting of this parameter is related to the operations schemes.



201

Remarks The BSC, instead of the PDSN, restricts the rate. The GRADEFWDLMTRATE is valid only when the QoS switch is on.

9.1.22 Optimization Switch (SPCLUSROPTSWT)

Description This parameter specifies the private line throughput optimization switch. If the switch is turned on, the leased line throughput optimization function is enabled.



DSP CBTSCFG


Default Value ON.





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10 Reverse Scheduling Parameters

I

10.1 Parameters Configured for the Rate Limit for Reverse Leased Lines 10.1.1 QoS Function Switch (QOSFUNSW)

Description This parameter specifies the QoS function switch.



LST DOGP


Default Value OFF.




203

Remarks Only when the QoS function switch is turned on, the functions such as the forward and reverse rate limit are enabled.

10.1.2 Reverse Limited Rate (REVLMTRATE)

Description This parameter specifies the reverse guaranteed rate (on the physical layer) of EV-DO Rev. A private line lines.



LST DOAQOS

Value Range RATE9K6 (9.6 kbit/s), RATE19K2 (19.2 kbit/s), RATE38K4 (38.4 kbit/s), RATE76K88 (76.8 kbit/s), RATE153K6 (153.6 kbit/s), RATE307K2 (307.2 kbit/s), and RATE614K4 (614.4 kbit/s).

Default Value Leased line 1: 153.6 kbit/s.



Setting Tradeoff This parameter restricts the reverse rates of private lines at various levels. The setting of this parameter is related to the operations schemes.

Remarks None.



204

10.2 Parameters Configured for the Rate Limit for Reverse BE Flow Subscribers 10.2.1 Reverse Limited Rate (REVLMTRATECLASS)

Description This parameter specifies the maximum reverse rate of the BE flow of EV-DO Rev. A subscribers.



LST DOAQOS

Value Range RATE19K2 (19.2 kbit/s), RATE38K4 (38.4 kbit/s), RATE76K8 (76.8 kbit/s), RATE115K2 (115.2 kbit/s), RATE153K6 (153.6 kbit/s), RATE230K4 (230.4 kbit/s), RATE307K2 (307.2 kbit/s), RATE460K8 (460.8 kbit/s), RATE614K4 (614.4 kbit/s), RATE921K6 (921.6 kbit/s), RATE1228K8 (1228.8 kbit/s), and RATE1843K2 (1843.2 kbit/s).

Default Value Gold subscribers: 1843.2 kbit/s.

Silver subscribers: 1843.2 kbit/s.

Bronze subscribers: 1843.2 kbit/s.


Remarks The REVLMTRATE is valid only when the QoS switch is on.

10.2.2 Reverse Limited Rate (REVLMTRATE)

Description This parameter specifies the maximum reverse rate of the EV-DO Rel. 0 subscribers at various levels and the reverse guaranteed rate of EV-DO Rel. 0 private lines.



205

Type Internal ordinary parameter of the system level.


LST DOQOS

Value Range RATE0 (0 kbit/s), RATE1 (9.6 kbit/s), RATE2 (19.2 kbit/s), RATE3 (38.4 kbit/s), RATE4 (76.8 kbit/s), and RATE5 (153.6 kbit/s).

Default Value Gold subscribers: RATE5 (153.6 kbit/s).

Silver subscribers: RATE4 (76.8 kbit/s).

Bronze subscribers: RATE3 (38.4 kbit/s).





Remarks REVLMTRATE is valid only when the QoS switch is on.

10.3 Parameters Configured for the Reverse Fixed Rate 10.3.1 AT Fixed Reverse Date Rate Switch(RVSFIXRATESWT)

Description This parameter specifies the AT fixed reverse rate switch. If the switch is on, the system detects whether the AT fixes the reverse rate, and sends a call release request to the BSC if the AT fixes the reverse rate.




206


DSP CBTSCFG


Default Value OFF.





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11 Other Parameters

11.1 Frame Exchange Parameters 11.1.1 Reverse Frame Combination Timer Length (RFCOMBINET)

Description This parameter specifies the maximum time difference allowed between the arrival of the reverse service frame of the first branch and that of the last branch when the BSC combines reverse legs.



LST DOSDUPARA


Default Value 10.

Setting Tradeoff If this parameter is set to a small value, the BSC cannot collect all the reverse service frames of the legs, and thus the frame combination gain decreases. If this parameter is set to a great value, the processing delay increases and does not meet the delay requirements of the DS services.

Remarks The AN enables the combination timer when receiving a new reverse trafic frame from a leg.



208

If the RTC MAC frame is a bad frame, the AN does not enable the combination timer until the AN receives good RTC MAC frame from another leg.

If the AN does not receive any good frames when the combination timer expires, the frames of certain legs must be lost. These lost frames are regarded as bad frames. If the frames of the legs that have already been received by the AN are bad frames, they are also regarded as bad frames.

11.1.2 Reverse Frame Transmission Path Jitter (RPDITHER)

Description This parameter is used to detect whether the existing frame is valid. If the time when the frame is actually received is not within the range of (FN x 26.667 ms – the value of RPDITHER) to (FN x 26.667 ms + the value of RPDITHER), this frame is regarded as an invalid frame.



LST DOSDUPARA

Value Range 40 to 208 (unit: 0.125 ms).

Default Value 81.

Setting Tradeoff If this parameter is set to a small value, large jitter is not allowed when the reverse frames are combined. Thus, a great number of frames received by the AN are invalid. If this parameter is set to a great value, the processing delay increases and the short delay required by the DS services cannot be satisfied.

Remarks If the received frames are invalid before the reverse frame combination timer expires, the system continues to wait for the frames of other legs.

11.1.3 Max. Idle Frame Sending Times (MAXIDLEFRM)

Description This parameter specifies 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 maximum number of idle frames is exceeded, the connection setup fails.



209



LST DOSDUPARA


Default Value 100.

Setting Tradeoff If this parameter is set to a small value, the success ratio of IDLE frame exchange is low. If this parameter is set to a great value, the success ratio of IDLE frame exchange is improved to some extent, but the duration of IDLE frame exchange is prolonged.

Remarks None.

11.1.4 Wait Idle Frame Timer Length (IDLEFRAMET)

Description This parameter specifies 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. If the BSC does not receive an IDLE frame from the BTS before the timer expires, the BSC retransmits IDLE frames within MAXIDLEFRM. If the timer expires or the retransmission times exceed MAXIDLEFRM, the connection setup fails.



LST DOSDUPARA




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Default Value 20.

Setting Tradeoff If this parameter is set to a small value, the success ratio of IDLE frame exchange and the connection setup success ratio are low. If this parameter is set to a great value, the success ratio 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.

11.1.5 Wait Reverse Frame Timer Length(IRFRECEIVET)

Description This parameter specifies the duration for waiting the BTS to capture an AT during call setup. If the BSC does not receive any reverse frames from the BTS within the duration specified by this parameter, the BSC releases this call.



LST DOSDUPARA


Default Value 4000.

Setting Tradeoff If this parameter is set to a small value, reverse capture may fail, and thus the connection setup may fail. If this parameter is set to a great value, the duration of connection setup increases.

Remarks None.



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11.1.6 Maximum Number of Abis Handshake Failures (HANDFAILCNT)

Description An Abis handshake is performed between the BSC and the BTS. When the number of handshake failures reaches the threshold specified by this parameter, the BSC regards that the Abis service is disrupted, and then this service connection is released.



LST DOSDUPARA


Default Value 20.

Setting Tradeoff If this parameter is set to a small value, connections can be abnormally released and the Abis link will be incorrectly considered as unavailable. If this parameter is set to a great value, fewer connections will be abnormally released and the Abis link state can be accurately indicated.

Remarks The BSC maintains the link (handshake) by periodically sending IDLE frames to the BTS in the case of no forward service frames. The BTS periodically sends IDLE frames to the BSC in the case of no reverse service frames. If the BSC does not receive a reverse service frame or a reverse idle frame after the timer expires for N (the value of this parameter) times, the handshake fails, and the connection is released by the DPUb.

11.1.7 Virtual SHO Monitor Timer Length (SHOMONITORT)

Description When the BTS cannot demodulate the DRC or the DRC is assigned to another leg, the BTS requests to stop sending data to this leg by sending a message to the AN. Then, the AN enables the corresponding timer. If the AN does not receive the preceding message from the BTS when the timer expires, the AN regards that call drop occurs or that the virtual handoff fails.



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LST DOSDUPARA

Value Range 1 to 40 (unit: s).

Default Value 3

Setting Tradeoff If this parameter is set to a small value, and if the forward radio environment deteriorates, the AT enters the inactive state before the AN call drop timer expires, and the AT initiates a connection request again. In this case, the call on the AN side is not released, and the connection request is considered to be abnormal. Thus, an abnormal release with the reason value 120e is initiated on the original connection, and the connection request is discarded.

Remarks If this parameter of the AN is inconsistent with that of the AT, the AN initiates a negotiation for the configuration of this parameter.

11.1.8 DRC Supervison Timer (DRCSUPERVISIONTMR)

Description According to the forward call drop mechanism, if the number of DRC = 0 detected by the AT exceeds (DRCSupervisionTimer x 10) + 240 ms, the reverse transmitter is shut down. Then, wait TFTCMPRestartTx (12 control channel periods, that is 5.12s). During this period, if the DRC is still 0, the AT shifts to the inactive state.



LST DOGCNPA




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Default Value 0

Setting Tradeoff If this parameter is set to a small value, and if the forward radio environment deteriorates, the AT enters the inactive state before the AN call drop timer expires, and the AT initiates a connection request again. In this case, the call on the AN side is not released, and the connection request is considered abnormal. Thus, an abnormal release with the reason value 120e is initiated on the original connection, and the connection request is discarded.

Remarks If this parameter of the AN is inconsistent with that of the AT, the AN initiates a negotiation for the configuration of this parameter.

11.2 Power Amplification Parameters 11.2.1 Whether to Support Automatic Blocking of Carrier (AUTODWNCDMACH)

Description This parameter determines whether idle carriers can be automatically disabled in idle time.



LST CDMACH

Value Range YES (supported), or NO (not supported).

Default Value NO.




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Remarks This parameter applies to the networking with multiple carriers. When the system supports automatic blocking, it automatically selects carriers according to the sector load and then blocks or unblocks the carriers. Whether the carrier automatic blocking function needs to be enabled depends on the operations schemes of operators. It is recommended that you enable this function as required by the operators.

11.2.2 Subscriber Threshold of Automatic Blocking EV-DO Carrier (DOUSERCOUNTTHD)

Description This parameter specifies the subscriber threshold of automatic carrier blocking. The system predicts the carrier load. If the average subscriber number of each carrier exceeds that threshold after the idle carriers are shut down, the automatic blocking function cannot be enabled for the carriers. Otherwise, the automatic blocking function is allowed to be enabled for the carriers.

Type Ordinary parameter of the sector level.

Related Commands ADD/MOD CELL

LST CELL


Default Value 20.

Setting Tradeoff If the value of this parameter is large, it is easy to trigger the carrier automatic blocking function. If the value of this parameter is small, it is difficult to trigger the carrier automatic blocking function.

Remarks The default value of this parameter is a great value. It is recommended that you change the default value to eight when the carrier automatic blocking function is required to be enabled.



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11.2.3 Automatic Blocking Times Threshold of EV-DO Carrier (DOAUTODWNCOUNTTHD)

Description This parameter specifies the times for the carrier load to continuously meet the automatic blocking conditions after which the carrier automatic blocking function can be triggered.



LST CELL


Default Value 600.

Setting Tradeoff If the value of this parameter is large, it is difficult to trigger the carrier automatic blocking function. If the value of this parameter is small, it is easy to trigger the carrier automatic blocking function.

Remarks The system detects the carrier load once each second. Thus, the preceding default value is equivalent to ten minutes.

11.2.4 Subscriber Threshold of Automatic Recovering EV-DO Carrier (DOUNBLKUSERCOUNTTHD)

Description This parameter specifies the threshold of carrier automatic unblocking. When the average load of each carrier exceeds that threshold, carriers need to be unblocked.




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LST CELL


Default Value 40.

Setting Tradeoff If the value of this parameter is small, it is easy to trigger the carrier automatic unblocking function. If the value of this parameter is large, it is difficult to trigger the carrier automatic unblocking function.

Remarks The default value of this parameter is a great value. It is recommended that you change the default value to 12 when the carrier automatic blocking function is enabled.

11.2.5 Destination Frequency Sequence for Automatic Blocking of Carrier (TRGARFCN)

Description This parameter specifies the frequencies that support carrier automatic blocking.

Type Ordinary global parameter.


LST DOGP

Value Range None.

Default Value None.




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Remarks It is recommended that subscribers do not enable automatic blocking for basic carriers.

11.2.6 Start Time of Idle Duration for Automatic Blocking (STRTIME)

Description This parameter specifies the start time of carrier automatic blocking.



LST DOGP

Value Range Time0 (0:00), Time1 (0:30), Time2 (1:00), Time3 (1:30), Time4 (2:00)……, and Time47 (23:30).

Default Value Time2 (1:00).


Remarks You must set this parameter according to the actual idle/busy situations of networks.

11.2.7 End Time of Idle Duration for Automatic Blocking (STOPTIME)

Description This parameter specifies the end time of carrier automatic blocking.




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LST DOGP

Value Range Time0 (0:00), Time1 (0:30), Time2 (1:00), Time3 (1:30), Time4 (2:00)……, and Time47 (23:30).

Default Value Time2 (1:00).


Remarks You must set this parameter according to the actual idle/busy situations of networks.

11.3 Access Authentication Parameters .

11.3.1 Retransmission Times for an A12 Request (A12REQRST)

Description This parameter specifies the retransmission times for the A12_Access_Request messages.

Type Parameter of the system level.

Related Commands MOD ANAAA

LST ANAAA

Value Range 1 to 5.

Default Value 2.



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Remarks None.

11.4 MEID Support Information Parameters 11.4.1 BSC Support MEID (BSCMEIDSUP)

Description This parameter determines whether the BSC supports the MEID terminal.

Type Ordinary parameter of the system level.

Related Commands MOD MEIDSUP

LST MEIDSUP


Default Value NO.

Setting Tradeoff It is recommended that you set this parameter to YES if MEID terminals exist in the network.

Remarks The traditional ESN has 32 bits, and it is the unique identifier of mobile phones. With increasing mobile subscribers, ESN resources are in great demand. The new 56-bit mobile equipment identifier (MEID) defined by the 3GPP2 can solve this problem.

11.4.2 Inter BSC Handoff Support MEID (INTERHOMEIDSUP)

Description This parameter determines whether inter-BSC handoff is supported at the MEID terminal.



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LST MEIDSUP


Default Value NO.


Remarks None.

11.4.3 Neighbor AN Support MEID (NBRANMEIDSUP)

Description This parameter determines whether neighbor ANs support the MEID terminal.



LST MEIDSUP


Default Value NO.




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Remarks None.

11.4.4 PDSN Support MEID (PDSNMEIDSUP)

Description This parameter determines whether the PDSN supports the MEID terminal.



LST MEIDSUP


Default Value NO.


Remarks None.

11.4.5 ANAAA Support MEID (ANAAAMEIDSUP)

Description This parameter determines whether AN-AAA supports the MEID terminal.



LST MEIDSUP



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Default Value NO.


Remarks None.

11.4.6 Method of Calculating Public Long Code Mask (CALCUPLCMMETHOD)

Description This parameter determines the method for calculating long code masks. If long code masks are calculated on the basis of the BTS longitude and latitude, you must ensure that the BSC saves the BTS longitude and latitude.

Type Parameter of the system level.


LST MEIDSUP

Value Range BASELONGLAT (BTS assignment based on longitude and latitude).

BASEMEID (BTS assignment based on MEID).

BASEHUAWEIPROPRIETARY (BTS assignment based on the method of Huawei proprietary).

Default Value BASEHUAWEIPROPRIETARY.




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Remarks None.



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12 White List Parameters

The EV-DO white list function allocates dedicated frequencies to particular subscribers and configures them as high-grade subscribers. In this way, the priorities of the subscribers over the air interface and on the Abis link are guaranteed.

12.1 Parameters Configured for the White List Function

12.1.1 Dedicated Carrier Flag (VIPCDMACH)

Description This parameter specifies whether the carrier is configured as the one particularly used for an EV-DO white list subscriber group.



LST CDMACH

Value Range YES (dedicated carrier), NO (common carrier).

Default Value NO (common carrier).




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Remarks This parameter is used only for the EV-DO Rev. A carriers. It specifies whether the carrier is configured as the one particularly used for an EV-DO white list subscriber group. You can run the MOD CDMACH command to modify the configuration of the current carrier and configure it as a carrier dedicated for a white list subscriber group. After the command is executed, no more ordinary subscribers should be allowed to access the carrier. However, the subscribers on this carrier are already in the active state; thus, they can still use this carrier. When these subscribers enter the dormant state, they will be assigned to other carriers.

12.1.2 VIP Group Indicator (VIPGROUP)

Description This parameter specifies which EV-DO white list subscriber group the carrier is dedicated to.



LST CDMACH

Value Range GROUP_1 (white list subscriber group 1)

GROUP_2 (white list subscriber group 2)


Default Value None.


Remarks This parameter is used only for the EV-DO Rev. A carriers. It specifies whether the carrier is configured as the one particularly used for some EV-DO white list groups. You can run the MOD CDMACH command to modify the configuration of the carrier dedicated for a white list subscriber group. When the command is executed, the ordinary subscribers continue to use this carrier because they are already in the active connection. When these subscribers enter the dormant state, they will be assigned to other carriers.



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12.1.3 User Identifier Type (VIPGRPID)

Description This parameter specifies which EV-DO white list subscriber group the subscriber belongs to.

Type ORDINARY PARAMETER OF THE BSC LEVEL.

Related Commands ADD VIPUSR

LST VIPUSR

Value Range GROUP_1 (white list subscriber group 1)



Default Value None.


Remarks A white list subscriber belongs to only one white list subscriber group. Each group contains up to 100 white list subscribers.

12.1.4 User Identifier Type (IDFTYPE)

Description This parameter specifies whether the ESN or MEID is used to identify the white list subscriber.



LST VIPUSR



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Value Range ESN, MEID

Default Value None.


Remarks When the AN enables the MEID function for the MEID ATs, these ATs must be respectively configured with the MEIDs and configured to one subscriber group, and IDFTYPE must be set to MEID. When the AN does not enable the MEID function, the ATs must be respectively configured with the pESNs, and IDFTYPE must be set to ESN.

12.1.5 VIP User ESN/ MEID (ESNLST/MEIDLST)

Description This parameter specifies the ESN or MEID of a white list subscriber.

Type ORDINARY PARAMETER OF THE BSC LEVEL.


LST VIPUSR

Value Range ESN and MEID of the valid format.

Default Value None.


Remarks When IDFTYPE is set to ESN, enter the eight-bit ESN that begins with 0x. A comma is used to separate two ESNs. When IDFTYPE is set MEID, enter the 14-bit MEID that begins with 0x. Up to five white list subscribers can be added at a time when a command is executed.

02 cdma performance parameters (ev-do) v3.3 for customers

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