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1、自動路測異常掉話分析1故障概述1.1故障描述籽移動反映在市區(qū)的測試屮經(jīng)常出現(xiàn)突然質(zhì)差，下行RQ為0級直接降為6?7級，造成掉話，基本每天測試都會出現(xiàn)這樣的現(xiàn)彖，出現(xiàn)問題的地點不固定。現(xiàn)場經(jīng)過錄制了5段掉話信令，現(xiàn)彖基木一致。1.2故障分析故障期間主被叫空口和Abis口信令如下圖所示：被叫界常釋放信令如圖1?3所示，在上下行電平和RQ均比較好的情況下，被叫從某一時刻起，RLLT遞減為0,導致掉話；而在此Z前的Abis口信令顯示，BTS上報“錯誤指示”，原因是亂序，網(wǎng)絡側釋放信道。1-d31SynchChannelInformationS1形SystemI
2、nformationType6S1tMeasurementReport32令SystemInformationType5S2tMeasurementReport51tMeasurementReportS2形SynchChannelInformation52I-CMD52DisconnectS2tRelease32CallEndS2?I-CMD52RR-RSFS2I-CMDS2ReleaseComplet?32tRR-RSP52SystemInformationType652tS1歲邏P[Eq.INemeIS2個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圖1被叫異常釋放空口信令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
