82Layer3信令分析

§1信令ID解释...............................................................................................................................1§1.1DT信令中ID解释..........................................................................................................1§1.2几个主要ID的解释........................................................................................................2§2正常信令流程.............................................................................................................................5§2.1呼叫建立及主叫释放信令流程......................................................................................5§2.3开机位置更新信令流程.................................................................................................16§2.4跨越LAC区位置更新信令流程...................................................................................17§2.5切换信令流程.................................................................................................................18§2.5.1同步切换信令流程..............................................................................................18§2.5.2非同步切换信令流程..........................................................................................19§3异常信令流程............................................................................................................................20§3.1由设备原因引起呼叫建立失败信令流程.....................................................................20§3.2被叫做位置更新造成主叫呼叫建立失败信令流程.....................................................21§3.3由于拥塞造成的呼叫建立失败信令流程.....................................................................22§3.4由于被叫鉴权被拒绝造成主叫呼叫建立失败信令流程.............................................22§3.5无线链路超时造成掉话信令流程.................................................................................23§3.6切换失败信令流程.........................................................................................................25§1信令ID解释§1.1DT信令中ID解释IDTITTLEMARKAQDLDownlinkAudioQualityMOS值AQIAudioQualityInformationMOS信息CAACallAttempt呼叫尝试CACCallConnectSuccess呼叫成功CADCallDisconnect通话结束CAIIncomingCall呼入CAFCallFailed呼叫失败CHIChannelInfo信道信息CICarrierInterferenceC/I，载干比CRELCellReselection小区重选DSCDownlinkSignalingCounter下行信令计数ERXLEnhancedRXLevel增强型电平FERFrame.ErrorRate误帧率HOAHandoverAttempt切换尝试HOFHandoverFailure切换失败HOPFrequencyHoppingStatus跳频状态HOSHandoverSuccess切换成功L2DLayer2Downlink第二层下行信令L2ULayer2Uplink第二层上行信令L3DLayer3Downlink第三层下行信令L3ULayer3Uplink第三层上行信令LUALocationUpdateAttempt位置更新尝试LUSLocationUpdateAccepted位置更新成功LUFLocationUpdateFailure位置更新失败MSPMSPower手机功率NLISTNeighborList邻区列表PCHIPacketChannelInfoGPRS信道信息RLTRadioLinkTimeout无线链路超时RXLRXLevel电平RXQRXQuality通话质量SEIServiceInformation服务信息TADTimingAdvanceTA值TBFITBFInformation§1.2几个主要ID的解释1AQDL(DownlinkAudioQuality)23.6AudioQualityMean:3.3MOS值第二项2AQI(AudioQualityInformation)3-11SyncStatus:Synchronized第三项1同步0不同步3CAD(CallDisconnect)111416116StatusCCCause1=Normaldisconnect2=Droppedcall.(i.e.,networkrelease)3=Droppedoutofservice.4=Droppedduringhandover/handoff/hardhandover5=Reserved(保留字段),例如:测试设备原因6=Transfertimeoutduringdataorfaxtestcall7=Protocolerrorduringdataorfaxtestcall8=Transferfailedduringdataorfaxtestcall9=Modemconnectionfailure.Dedicatedconnectionalreadyachieved10=Networkbusy(GSM)WhennetworkhasnotsentALERTorCONNECTmessagebeforeitsendsDISCONNECTmessage11=Voicequalitysynchronizationlost1Unassigned(unallocatednumber)3Noroutetodestination6Channelunacceptable8Operatordeterminedbarring16Normalclearing17Userbusy18Nouserresponding19Useralerting,noanswer21Callrejected22Numberchanged26Nonselecteduserclearing27Destinationoutoforder28Invalidnumberformat(incompletenumber)29Facilityrejected30ResponsetoSTATUSENQUIRY31Normal,unspecified34Nocircuit/channelavailable38Networkoutoforder41Temporaryfailure42Switchingequipmentcongestion43Accessinformationdiscarded44Requestedcircuit/Channelnotavailable47Resourcesunavailable,unspecified49Qualityofserviceunavailable50Requestedfacilitynotsubscribed55IncomingcallsbarredwithintheCUG57Bearercapabilitynotauthorized58Bearercapabilitynotpresentlyavailable63Seviceoroptionnotavailable,unspecified65Bearerservicenotimplemented69Requestedfacilitynotimplemented70Onlyrestricteddigitalinformationbearercapabilityisavailable79Serviceoroptionnotimplemented,unspecified81Invalidtransactionindentifiervalue87UsernotmemberofCUG88Incompatibledestination91Invalidtransitnetworkselection95SemanticallyincorrectmessageNEMOTECHNOLOGIES23396Invalidmandatoryinformation97Messagetypenotnon-existent98Messagetypenotcompatiblewithprotocolstate99Informationelementnonexistentornotimplemented100ConditionalIEerror101Messagenotcompatiblewithprotocolstate102Recoveryontimerexpiry111Protocolerror,unspecified127Interworking,unspecified4CAF(CallFailed)52-1State:Testsystemfailure,参考CAD(CallDisconnect)第一项OSRASCause:n/a5CHI(ChannelInfo信道信息)12744179114101-11641357412744179114101-116413574ChannelTypeCarrierNumberCellIdLACRLTExtendedChannelTypeTimeslotBCCH1=controlchannel2=trafficchannel载频频点小区位置区-1=NotAvailable1=BCCH2=CCCH3=CBCH4=SDCCH5=RACH10=TCHhalfrate,firsthalf11=TCHhalfrate,secondhalf12=TCHfu