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1、自动路测异常掉话分析1故障概述1.1故障描述籽移动反映在市区的测试屮经常出现突然质差,下行RQ为0级直接降为6〜7级,造成掉话,基本每天测试都会出现这样的现彖,出现问题的地点不固定。现场经过录制了5段掉话信令,现彖基木一致。1.2故障分析故障期间主被叫空口和Abis口信令如下图所示:被叫界常释放信令如图1〜3所示,在上下行电平和RQ均比较好的情况下,被叫从某一时刻起,RLLT递减为0,导致掉话;而在此Z前的Abis口信令显示,BTS上报“错误指示”,原因是乱序,网络侧释放信道。1-d31SynchChannelInformationS1形SystemI
2、nformationType6S1tMeasurementReport32令SystemInformationType5S2tMeasurementReport51tMeasurementReportS2形SynchChannelInformation52I-CMD52DisconnectS2tRelease32CallEndS2♦I-CMD52RR-RSFS2I-CMDS2ReleaseComplet©32tRR-RSP52SystemInformationType652tS1岁逻P[Eq.INemeIS2个MeasurementReportIS2O
3、ChannelReleaseIS2tDISC-CMDIS2令UA-RSPIS2令PagingRequestType1IS2占SynchChannelInformationIS2OSynchChannelInformationIS28Syst©mInformationType4IS2OSynchChannelInformationIS2令SynchChannelInformationIS2令SystemInformationType4IS1OSystemInformationType3MSI圍DroppedCallIS1OSynchChannelInfo
4、rmationIS1令SystemInformationType13IS1令SynchChannelInformationIS1令SystemInformationType2quaterIS1&SynchChannelInformationIS1OSystemInformationType3图1被叫异常释放空口信令1Events1[EqEv^ritInfo:2:2:2:2:2IdId:2:22:2CallAttemptDedicatedModeCallCallCallCallCallCallIdleIdleCallCallDedicatedModeCa
5、llAttemptDedicatedModeCallCallCallCallCallIdleSetupSetupEstablishedEstablishedEndEndModeModeInitiationAttemptBCCHARFCN:69,BSIC:5-1MTMOcall,setuptime:3438mscall,setuptime:7969ms’・MSMSBCCHBCCHinitiatedrelease・initiatedrelease.ARFCN:ARFCN:BCCHBCCHMTMOSetupS©tupEstablishedEstablishe
6、dEndNWARFCN:6369,69,ARFCN:call,setupcall,setup69,BSIC:BSIC:BSIC:BSIC:time:time:Calldu...Calldu...5-15-15-13453ms7218ms,・initiatedrelease.Calldu...I口22ModeBCCHARFCN:69,BSIC:5-1BCCHARFCN:63BSIC::2:2:2;22IdIdPacketModeRoutingArea・・・IdleModeCallInitiationCallAttemptDedicatedModeCall
7、AttemptDedicatedModeCallCallCallCallCallCallIdleIdleS©tupSetupEstablishedEstablishedEndEndModeModeBCCHARFCN:BCCHARFCN:6369,69,call,setupcall,setupBCCHARFCN:MTMOBSIC:BSIC:BSIC:5-1time:2906mstime:7563ms’・initiaLt*release・initiatedrelease.MSNWBCCHARFCN:69,BSIC:BCCHARFCN:69,BSIC:Cal
8、ldu...Calldu...5-15-1Site
9、Bls
10、Trx
11、TS
12、SC
13、SAPI
14、RS