信令流程

信令流程主叫流程（一）MSBSCChannelactivationackChannelactivationEncryptioncommandChannelrequiredCompleteLayer3Info.AuthenticationrequestCallproceedingCipherModeCompleteSABM(cm_serv_req)ImmediateassigncommandestablishindicationBTSChannelrequestUA(cm_serv_req)CipherModeCommandImmediateassignmentMSCAuthenticationresponseSetupCipherModeCommandCipherModeComplete主叫流程（二）MSBSCBTSMSCAssignmentRequestChannelactivationackAssignmentcommandestablishindicationAssignmentCompleteAssignmentCompleteDeactivateSACCHReleaserequestReleaseconfirmRFChannlereleaseRFChannelreleaseackAlertingConnectConnectacknowledgeSABMUAChannelactivation主叫流程（三）MSBSCBTSMSCChannelReleaseReleaseCompleteReleaseClearCommandRFChannlereleaseDISCDeactivateSACCHRFChannelreleaseackReleaseIndicationUADisconnectClearComplete被叫流程（一）MSBSCBTSMSCChannelactivationackChannelactivationEncryptioncommandChannelrequiredCompleteLayer3Info.AuthenticationrequestCallconfirmCipherModeCompleteSABM(pag_resp)ImmediateassigncommandestablishindicationChannelrequestUA(pag_resp)CipherModeCommandImmediateassignmentAuthenticationresponseSetupCipherModeCommandCipherModeCompletePagingCommandPagingRequestPaging被叫流程（二）MSBSCBTSMSCAssignmentRequestChannelactivationackAssignmentcommandestablishindicationAssignmentCompleteAssignmentCompleteDeactivateSACCHReleaserequestReleaseconfirmRFChannlereleaseRFChannelreleaseackAlertingConnectConnectacknowledgeSABMUAChannelactivation位置更新流程（一）MSBSCChannelactivationackChannelactivationEncryptioncommandChannelrequiredCompleteLayer3Info.AuthenticationrequestTMSIreallocationcompleteCipherModeCompleteSABM(loc_upd_req)ImmediateassigncommandestablishindicationBTSChannelrequestUA(loc_upd_req)CipherModeCommandImmediateassignmentMSCAuthenticationresponseLocationupdatingacceptCipherModeCommandCipherModeComplete位置更新流程（二）MSBSCBTSMSCChannelReleaseClearCommandRFChannlereleaseDISCDeactivateSACCHRFChannelreleaseackReleaseIndicationUAClearComplete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)MeasurementresultChannelactivationackEstablishindicationReleaseConfirmationMeasurementreportAssigmentcomplete(FACCH)HOPerformedRFChannelReleaseACKAssigmentcommand(FACCH)ReleaseRequestRFChannelReleaseChannelactivationUA（FACCH）ReceiverReady(FACCH)小区间切换MSBSCBTS1BTS2ChannelactivationChannelactivationackMeasurementresultHandovercommandMeasurementreportHandoveraccessHandovercompleteSABMUAHandovercompleteHandoverperformed(tomsc)PhysicalinformationestablishindicationHandoverdetectionReleaseRequestReleaseConfirmationRFChannelReleaseACKRFChannelRelease外部切换MSMSCBSS2BSS1MeasurementReport(SACCH)BTS2BTS1MeasurementResultHandoverRequiredHandoverRequestChannelActivationChannelActivationACKHORequestACKHandoverCommandHandoverCommand(FACCH)HandoverAccess(FACCH)HandoverDetectionHandoverDetectionPhysicalInformation(FACCH)SABM(FACCH)EstablishIndicationUA(FACCH)HandoverComplete(FACCH)ReceiverReady(FACCH)HandoverCompleteHandoverCompleteClearCommandReleaseRequestReleaseConfirmationRFChannelReleaseRFCHReleaseACKClearCommand短信发送流程（一）MSBSCChannelactivationackChannelactivationEncryptioncommandChannelrequiredCompleteLayer3Info.AuthenticationrequestCipherModeCompleteSABM(cm_serv_req)ImmediateassigncommandestablishindicationBTSChannelrequestUA(cm_serv_req)CipherModeCommandImmediateassignmentMSCAuthenticationresponseCipherModeCommandCipherModeCompleteSABM(SAPI=3)UA(SAPI=3)establishindication短信发送流程（二）MSBSCBTSCPDATA(MSTOSMC)MSCCPACKCPDATA(SMCTOMS)CPACKClearCommandChannelReleaseRFChannelreleaseDISCDeactivateSACCHRFChannelreleaseackReleaseIndicationUAClearComplete短信接收流程（一）MSBSCBTSMSCChannelactivationackChannelactivationEncryptioncommandChannelrequiredCompleteLayer3Info.AuthenticationrequestCipherModeCompleteSABM(pag_resp)ImmediateassigncommandestablishindicationChannelrequestUA(pag_resp)CipherModeCommandImmediateassignmentAuthenticationresponseCipherModeCommandCipherModeCompletePagingCommandPagingRequestPaging（SMCTOMS）SABM(SAPI=3)UA(SAPI=3)establishindicationestablishconfirmationCPDATA（SMCTOMS）短信接收流程（二）MSBSCBTSCPDATA(SMCTOMS)MSCCPACKCPDATA(MSTOSMC)CPACKClearCommandChannelReleaseRFChannelreleaseDISCDeactivateSACCHRFChannelreleaseackReleaseIndicationUAClearComplete数据业务流程MSHLRSGSNGGSNAttachRequestTripletrequestAuthenticationUpdataLocationInsertSubscriberDataUpdataLocationACKAttachAcceptActivatePDPContextRequestCreatPDPContextRequestCreatPDPContextResponseActivatePDPContextResponse特殊流程•单、双频指示•IMSIATTACH/DETACH•切换失败单、双频指示移动台单、双频指示Classmark3Classmark3是在SYSTEMINFORMATIONTYPE4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：MultibandsSupported(3bitfield)Band1supported(thirdbitofthefield)0P-GSMnotsupported1P-GSMsupportedBand2supported(secondbitofthefield)0E-GSMnotsupported1E-GSMsupportedBand3supported(firstbitofthefield)0DCS1800notsupported1DCS1800supportedIMSIATT/DETA小区允许（禁止）ATTACH/DETACH的标记由小区在SYSTEMINFORMATIONTYPE3进行广播。其定义情况如下所示：ATT,Attach-detachallowed(octet2)Bit7.0MSsinthecellarenotallowedtoapplyIMSIattachanddetachprocedure.1MSsinthecellshallapplyIMSIattachanddetachprocedure.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，从而恢复该用户的正常呼叫处理。这类似于正常的位置更新。但请求的类型为“