信令流程.pptx

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1、信令流程主叫流程（一）MSBSCChannel activation ackChannel activationEncryption commandChannel requiredComplete Layer 3 Info.Authentication requestCall proceedingCipher Mode CompleteSABM(cm_serv_req)Immediate assign commandestablish indicationBTSChannel requestUA(cm_serv_req)Cipher Mode CommandImmediate assignme

2、nt MSCAuthentication responseSetupCipher Mode CommandCipher Mode Complete主叫流程（二）MSBSCBTSMSCAssignment RequestChannel activation ackAssignment commandestablish indicationAssignment CompleteAssignment CompleteDeactivate SACCHRelease requestRelease confirmRF Channle releaseRF Channel release ackAlertin

3、gConnectConnect acknowledgeSABMUAChannel activation主叫流程（三）MSBSCBTSMSCChannel ReleaseRelease CompleteReleaseClear CommandRF Channle releaseDISCDeactivate SACCHRF Channel release ackRelease IndicationUADisconnectClear Complete被叫流程（一）MSBSCBTSMSCChannel activation ackChannel activationEncryption command

4、Channel requiredComplete Layer 3 Info.Authentication requestCall confirmCipher Mode CompleteSABM(pag_resp)Immediate assign commandestablish indicationChannel requestUA(pag_resp)Cipher Mode CommandImmediate assignment Authentication responseSetupCipher Mode CommandCipher Mode CompletePaging CommandPa

5、ging RequestPaging被叫流程（二）MSBSCBTSMSCAssignment RequestChannel activation ackAssignment commandestablish indicationAssignment CompleteAssignment CompleteDeactivate SACCHRelease requestRelease confirmRF Channle releaseRF Channel release ackAlertingConnectConnect acknowledgeSABMUAChannel activation位置更新

6、流程（一）MSBSCChannel activation ackChannel activationEncryption commandChannel requiredComplete Layer 3 Info.Authentication requestTMSI reallocation completeCipher Mode CompleteSABM(loc_upd_req)Immediate assign commandestablish indicationBTSChannel requestUA(loc_upd_req)Cipher Mode CommandImmediate ass

7、ignment MSCAuthentication responseLocation updating acceptCipher Mode CommandCipher Mode Complete位置更新流程（二）MSBSCBTSMSCChannel ReleaseClear CommandRF Channle releaseDISCDeactivate SACCHRF Channel release ackRelease IndicationUAClear Complete切换流程小区内切换流程小区间切换流程外部切换流程小区内切换MSCBTSBSCMSSABM(FACCH)Measuremen

8、t resultChannel activation ackEstablish indicationRelease ConfirmationMeasurement reportAssigment complete(FACCH)HO PerformedRF Channel Release ACKAssigment command(FACCH)Release RequestRF Channel ReleaseChannel activationUA（FACCH）Receiver Ready(FACCH)小区间切换MSBSCBTS1BTS2Channel activationChannel acti

9、vation ackMeasurement resultHandover commandMeasurement reportHandover accessHandover completeSABMUAHandover completeHandover performed(to msc)Physical informationestablish indicationHandover detectionRelease RequestRelease ConfirmationRF Channel Release ACKRF Channel Release外部切换MSMSCBSS2BSS1Measure

10、ment Report(SACCH)BTS2BTS1Measurement ResultHandover RequiredHandover RequestChannel ActivationChannel Activation ACKHO Request ACKHandover CommandHandover Command(FACCH)Handover Access(FACCH)Handover DetectionHandover DetectionPhysical Information (FACCH)SABM(FACCH)Establish IndicationUA (FACCH)Han

11、dover Complete(FACCH)Receiver Ready (FACCH)Handover CompleteHandover CompleteClear CommandRelease RequestRelease ConfirmationRF Channel ReleaseRF CH Release ACKClear Command短信发送流程（一）MSBSCChannel activation ackChannel activationEncryption commandChannel requiredComplete Layer 3 Info.Authentication re

12、questCipher Mode CompleteSABM(cm_serv_req)Immediate assign commandestablish indicationBTSChannel requestUA(cm_serv_req)Cipher Mode CommandImmediate assignment MSCAuthentication responseCipher Mode CommandCipher Mode CompleteSABM(SAPI=3)UA(SAPI=3)establish indication短信发送流程（二）MSBSCBTSCP DATA(MS TO SMC

13、)MSCCP ACKCP DATA(SMC TO MS)CP ACKClear CommandChannel ReleaseRF Channel releaseDISCDeactivate SACCHRF Channel release ackRelease IndicationUAClear Complete短信接收流程（一）MSBSCBTSMSCChannel activation ackChannel activationEncryption commandChannel requiredComplete Layer 3 Info.Authentication requestCipher

14、 Mode CompleteSABM(pag_resp)Immediate assign commandestablish indicationChannel requestUA(pag_resp)Cipher Mode CommandImmediate assignment Authentication responseCipher Mode CommandCipher Mode CompletePaging CommandPaging RequestPaging（SMC TO MS）SABM(SAPI=3)UA(SAPI=3)establish indicationestablish co

15、nfirmationCP DATA（SMC TO MS）短信接收流程（二）MSBSCBTSCP DATA(SMC TO MS)MSCCP ACKCP DATA(MS TO SMC)CP ACKClear CommandChannel ReleaseRF Channel releaseDISCDeactivate SACCHRF Channel release ackRelease IndicationUAClear Complete数据业务流程MSHLRSGSNGGSNAttach RequestTriplet requestAuthenticationUpdata LocationInser

16、t Subscriber DataUpdata Location ACKAttach AcceptActivate PDP Context RequestCreat PDP Context RequestCreat PDP Context ResponseActivate PDP Context Response特殊流程单、双频指示IMSI ATTACH/DETACH 切换失败单、双频指示移动台单、双频指示移动台单、双频指示 Classmark 3Classmark 3 是在SYSTEM INFORMATION TYPE 4 中所包含的一个元素。用来指示手机的单、双频状态。其定义情况如下所示：

17、Multibands Supported(3 bit field)Band1 supported(third bit of the field)0 P-GSM not supported1P-GSM supportedBand2supported(second bit of the field)0 E-GSM not supported1 E-GSM supportedBand3supported(first bit of the field)0 DCS1800 not supported1 DCS1800 supportedIMSI ATT/DETA小区允许（禁止）ATTACH/DETACH

18、的标记由小区在 SYSTEM INFORMATION TYPE 3 进行广播。其 定义情况如下所示：ATT,Attach-detach allowed(octet2)Bit 7.0 MSs in the cell are not allowed to apply IMSI attach and detach procedure.1MSs in the cell shall apply IMSI attach and detach procedure.IMSI 的 附 着 是 由 移 动 用 户 送 位 置 更 新 请 求 来 消 除VLR 中 的 分 离 标 志，从 而 恢复 该 用 户 的

19、正 常 呼 叫 处 理。这 类 似 于 正 常 的 位 置 更 新。但 请 求 的 类 型 为“IMSI ATTACH”。另 外，用 户 应 和 分 离 前 在 同 一 位 置 区 内，否 则，它 只 能 启 动一 般 的 位 置更 新过程。IMSI的分离是由移动台发送“IMSI DETACH INDICATION”，网络收 到IMSI 分 离 消 息 后 VLR 给 该 用 户 的 信 息 设 置 一 个IMSI 分 离 的 标 志。并 启 动IMSI 分 离 的 计 时 器“T3220”。计 时 器 超 时，则 从VLR 中 删 除 该 用 户 的 信 息。IMSI 分 离 的 标 志 设

20、 定 后，MSC 将 停 止 寻 呼 该 用 户，尽 管 它 仍 然 在 自 己 的 管 辖 区 内。切换失败当移动台触发切换，在Handover Command 之后，由于各类原因致使移动台无法正常进行切换信令流程，由移动台上行发送 Handover Failure。指示切换失败，并在原服务小区上保持通话。其信令流程如下所示：MSBSCBTS1BTS2Channel activationChannel activation ackMeasurement resultHandover commandMeasurement reportHandover accessHandover Failure