默认参数设置导致TBF上行掉话率高

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1、文档名称文档密级：N国N局点TBF掉话分析问题发现N国N局点5频3制式网络搬迁和新建。2GBTS和BSC之间部分TDM，部分IP组网。2GPilot搬迁完成后出现了TBF上行掉话率差于原网。分析阶段统计一周TBF上行掉话情况，将超过ReferenceKPI（2%）的站点筛选如下。GCELLTBFDropRateGCELLTBFDropRateAKH118_G9-116.86148008AKH165_G9-12.660342741AKH165_G9-015.35433681AKH151_G9-22.

2、656725062AKH035_G9-211.38722099AKH102_G9-22.63274714AKH086_G9-37.004210628AKH404_G9-12.596914696AKH438_G9-26.879498546AKH035_G9-32.566641427AKH233_G9-25.833333333AKH035_G9-12.389160587AKH086_G9-25.648468878AKH176_G9-12.369768924AKH165_G9-35.493796742A

3、KH450_G9-32.33713427AKH323_G18-85.292479109AKH448_G9-22.321347292AKH450_G9-15.21766628AKH389_G9-22.306583919AKH438_G9-15.075961258AKH395_G9-22.282579183AKH120_G9-14.122765941AKH213_G9-12.243677357AKH264_G9-14.112591567AKH171_G9-12.23707914AKH151_G9-13

4、.763577733AKH038_G9-22.230914017AKH213_G9-33.727231391AKH292_G9-22.21790962AKH006_G9-13.480239601AKH171_G9-22.214668036AKH006_G9-23.288853413AKH213_G9-22.212920837AKH409_G9-23.157796102AKH006_G9-32.200548665AKH110_G9-13.15347964AKH383_G9-22.176500595A

5、KH086_G9-12.973030583AKH165_G9-22.171162508AKH038_G9-32.913654154AKH450_G9-22.168871686AKH151_G9-32.88023727AKH193_G9-12.132811228AKH448_G9-12.761627907AKH438_G9-32.0660327332021-7-23华为机密，未经许可不得扩散第8页,共8页文档名称文档密级：AKH038_G9-12.69199067　　分析其中一个站点相关的TBF上行

6、掉话原因分布：2021-7-23华为机密，未经许可不得扩散第8页,共8页文档名称文档密级：2021-7-23华为机密，未经许可不得扩散第8页,共8页文档名称文档密级：2021-7-23华为机密，未经许可不得扩散第8页,共8页文档名称文档密级：可以看出大部分的掉话原因都是N3101超时导致的掉话。N3101统计的是接入阶段的定时器超时导致的掉话，N3101触发的条件入下协议的解释：N3101:WhenthenetworkaftersettingUSFforagivenTBF,receivesaval

7、iddatablockofthisTBFfromthemobilestationinablockassignedforthisUSF,itwillresetcounterN3101.IfPSHandoverisnotongoing,thenetworkwillincrementcounterN3101foreachUSFforwhichnodataisreceivedforthisTBF.N3101maxshallbegreaterthan8.IfN3101=N3101max,thenetwork

8、shallstoptheschedulingofRLC/MACblocksfromthemobilestationforthisUSFandstarttimerT3169.DuringextendeduplinkTBFmode,counterN3101shallnotbeincrementedifthenetworkdoesnotrequireamobilestationtosendPACKETUPLINKDUMMYCONTROLBLOCKmessageswhenthereisno