LTE系统信令流程全集

LTE系统信令流程全集UE开机附着信令流程UEAttach信令流程UEAttach信令流程(续)Spec23.4015.3.2AttachProcedureSpec23.4015.3.2AttachProcedure(cont.)HSS9a.PCEFInitiatedIP-CANSessionModification9.ModifyBearerRequest(A)11.CreateSessionResponse17.UpdateLocationAck18.DeleteSessionRequest19.DeleteSessionResponse4.ContextRequest2.TAURequestnewMMEoldMME/oldS4SGSNnewServingGWPDNGW5.ContextResponse6.Authentication/Security12.UpdateLocation13.CancelLocation14.CancelLocationAck20.TAUAccept21.TAUComplete7.ContextAcknowledgeoldServingGW3.TAURequesteNodeBUE8.CreateSessionRequest10.ModifyBearerResponse(B)1.TriggertostartTAUprocedureRNC15.IuReleaseCommand16.IuReleaseCompletePCRF23.4015.3.3.1S-GW改变的TAU信令流程(TrackingAreaUpdate跟踪区更新)UE移入LTE接入网通过TAU让核心网更新资源2.TrackingAreaUpdateRequest14.UpdateLocationRequest5.ContextResponse6.Authentication/Security20.TrackingAreaUpdateAccept15.CancelLocation7.ContextAcknowledge4.ContextRequest17.IuReleaseCommand18.IuReleaseComplete21.TrackingAreaUpdateCompleteUEeNodeBPDNHSS3.TrackingAreaUpdateRequest19.UpdateLocationAck16.CancelLocationAck9.ModifyBearerRequest13.ModifyBearerResponse10.ModifyBearerRequest12.ModifyBearerResponseRNCBSC(A)PCRFServingGW1.TriggertostartTAUprocedureUEeNodeBMMEOldMME/OldS4SGSNPDNGWHSS11.PCEFInitiatedIP-CANSessionModification23.4015.3.3.2S-GW不变的TAU信令流程(TrackingAreaUpdate跟踪区更新)UE移入LTE接入网通过TAU让核心网更新资源(A)2a.RouteingAreaUpdateRequest7.ModifyBearerRequest11.ModifyBearerResponse12.UpdateLocation15.UpdateLocationAck4.ContextResponse5.Authentication18.RouteingAreaUpdateAccept13.CancelLocation13.CancelLocationAck6.ContextAcknowledge3.ContextRequest19.RouteingAreaUpdateCompleteUERNC/BSSeNodeBSGSNMMEServingGWPDNGWHSS1.UEChangestoUTRANorGERAN8.ModifyBearerRequest10.ModifyBearerResponse2b.RouteingAreaUpdateRequest14.S1-AP:S1ReleaseCommandReleaseE-UTRANconnection14.S1-AP:S1ReleaseCompletePCRF21.RABAssignmentRequest21b.RABAssignmentResponse20.ServiceRequest22.ModifyBearerRequest22b.ModifyBearerResponse9.PCEFInitiatedIP-CANSessionModificationOldSGSN23.4015.3.3.3通过MME交互且S-GW不变的路由区更新(RAU)UE离开LTE接入网已经在2G/3G网通过RAU让核心网修改资源(A)2a.RouteingAreaUpdateRequest7.CreateSessionRequest11.CreateSessionResponse12.UpdateLocation15.UpdateLocationAck4.ContextResponse5.SecurityFunctions18.RouteingAreaUpdateAccept13.CancelLocation13.CancelLocationAck6.ContextAcknowledge3.ContextRequest19.RouteingAreaUpdateCompleteUERNC/BSSeNodeBSGSNMMENewServingGWPDNGWHSS1.UEChangestoUTRANorGERAN8.ModifyBearerRequest10.ModifyBearerResponse2b.RouteingAreaUpdateRequest14.S1-AP:S1ReleaseCommandReleaseE-UTRANconnection14.S1-AP:S1ReleaseCompletePCRF16.DeleteSessionRequest17.DeleteSessionResponse(B)OldServingGW21.RABAssignmentRequest21b.RABAssignmentResponse20.ServiceRequest22.ModifyBearerRequest22b.ModifyBearerResponse9.PCEFInitiatedIP-CANSessionModificationOldSGSN23.4015.3.3.6通过MME交互且S-GW改变的路由区更新(RAU).UE离开LTE接入网已经在2G/3G网通过RAU让核心网更新资源RRCIDLE下，如果有上行数据或者上行信令（与TAU无关的）发送，UE可以在TAUrequest消息中设置“active”标识，来请求建立用户面资源，并且TAU完成后保持NAS信令连接。如果没有设置active标识，则TAU完成后释放NAS信令连接。这个是IDLE下发起的不设置active标识的正常TAU流程图UEEPCeNBconnected下当UE进入的TAI不在保存的TAIlist内3.MME间更新UE上下文等1.ULInformationTransfer(包含TAUrequest消息)4.DOWNLINKNASTRANSPORT(包含TAUAccept消息)5.DLInformationTransfer（包含TAUAccept消息）6.ULInformationTransfer（包含TAUComplete消息）7.UPLINKNASTRANSPORT（包含TAUComplete消息）2.UPLINKNASTRANSPORT（包含TAUrequest消息）这个是RRCConnect状态下发起的的正常TAU流程图(都不设置active标识)Spec23.4015.3.4.1UStriggered“ServiceRequest”ProcedureMMEServingGWPDNGW2.NAS:ServiceRequest1.NAS:ServiceRequest7.S1-AP:InitialContextSetupComplete3.Authentication/SecurityHSS4.S1-AP:InitialContextSetupRequest5.RadioBearerEstablishment6.UplinkData8.ModifyBearerRequest12.ModifyBearerResponseUEeNodeB11.ModifyBearerResponsePCRF(A)10.PCEFInitiatedIP-CANSessionModification9.ModifyBearerRequestUE发起的”servicerequest”流程Spec23.4015.3.4.3Networktriggered“ServiceRequest”ProcedureThepurposeoftheservicerequestprocedureistotransfertheEMMmodefromEMM-IDLEtoEMM-CONNECTEDmodeandestablishtheradioandS1bearerswhenuplinkuserdataorsignallingistobesent.AnotherpurposeofthisprocedureistoinvokeMO/MTCSfallbackor1xCSfallbackprocedures.Thisprocedureisusedwhen:1thenetworkhasdownlinksignallingpending;2theUEhasuplinksignallingpending;3theUEorthenetworkhasuserdatapendingandtheUEisinEMM-IDLEmode;4theUEinEMM-IDLEorEMM-CONNECTEDmodehasrequestedtoperformmobileoriginating/terminatingCSfallbackor1xCSfallback;5thenetworkhasdownlinkcdma2000®signallingpending;or6theUEhasuplinkcdma2000®signallingpending.TheservicerequestprocedureisinitiatedbytheUE,however,forthedownlinktransferofsignalling,cdma2000®signallingoruserdatainEMM-IDLEmode,thetriggerisgivenbythenetworkbymeansofthepagingprocedure.TheUEshallinvoketheservicerequestprocedurewhen:a)theUEinEMM-IDLEmodereceivesapagingrequestwithCNdomainindicatorsettoPSfromthenetwork;b)theUE,inEMM-IDLEmode,haspendinguserdatatobesent;c)theUE,inEMM-IDLEmode,hasuplinksignallingpending;d)theUEinEMM-IDLEorEMM-CONNECTEDmodeisconfiguredtouseCSfallbackandhasamobileoriginatingCSfallbackrequestfromtheupperlayer;e)theUEinEMM-IDLEmodeisconfiguredtouseCSfallbackandreceivesapagingrequest