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.)23.40S-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23.40S-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23.40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23.40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)Spec23.40UStriggered“ServiceRequest”ProcedureUE发起的”servicerequest”流程Spec23.40Networktriggered“ServiceRequest”ProcedureThepurposeoftheservicerequestprocedureistotransfertheEMMmodefromEMM-IDLEtoEMM-CONNECTEDmodeandestablishtheradioandS1bearerswhenuplinkuserdataorsignallingistobesent.AnotherpurposeofthisprocedureistoinvokeMO/MTCSfallbackor1xCSfallbackprocedures.Thisprocedureisusedwhen:1 thenetworkhasdownlinksignallingpending;2 theUEhasuplinksignallingpending;3 theUEorthenetworkhasuserdatapendingandtheUEisinEMM-IDLEmode;4theUEinEMM-IDLEorEMM-CONNECTEDmodehasrequestedtoperformmobileoriginating/terminatingCSfallbackor1xCSfallback;5 thenetworkhasdownlinkcdma2000®signallingpending;or6 theUEhasuplinkcdma2000®signallingpending.TheservicerequestprocedureisinitiatedbytheUE,however,forthedownlinktransferofsignalling,cdma2000®signallingoruserdatainEMM-IDLEmode,thetriggerisgivenbythenetworkbymeansofthepagingprocedure.TheUEshallinvoketheservicerequestprocedurewhen:a) theUEinEMM-IDLEmodereceivesapagingrequestwithCNdomainindicatorsetto"PS"

fromthenetwork;b) theUE,inEMM-IDLEmode,haspendinguserdatatobesent;c) theUE,inEMM-IDLEmode,hasuplinksignallingpending;theUEinEMM-IDLEorEMM-CONNECTEDmodeisconfiguredtouseCSfallbackandhasamobileoriginatingCSfallbackrequestfromtheupperlayer;theUEinEMM-IDLEmode

isconfiguredtouseCSfallbackandreceivesapagingrequest

withCNdomainindicatorsetto"CS",ortheUEinEMM-CONNECTEDmodeisconfiguredtouseCSfallbackandreceivesaCSSERVICENOTIFICATIONmessage;theUEinEMM-IDLEorEMM-CONNECTEDmodeisconfiguredtouse1xCSfallbackandhasamobileoriginating1xCSfallbackrequestfromtheupperlayer;theUEinEMM-CONNECTEDmodeisconfiguredtouse1xCSfallbackand

acceptscdma2000®signallingmessages

containinga1xCSpagingrequest;orh) theUE,inEMM-IDLEmode,hasuplinkcdma2000®signallingpending.Ifoneoftheabovecriteriatoinvoketheservicerequestprocedureisfulfilled,thentheservicerequestproceduremayonlybeinitiatedbytheUEwhenthefollowingconditionsarefulfilled:- itsEPSupdatestatusisEU1UPDATED,andtheTAIofthecurrentservingcellisincludedintheTAIlist;and- noEMMspecificprocedureisongoing.Spec24.3015.6.1“ServiceRequest”ProcedureSpec24.3015.6.1“ServiceRequest”Procedure没有成功的返回消息UE在RRC_IDLE下发起的非关机去附着(Detachprocedure)UE在RRC_CONNECT下发起的非关机去附着(Detachprocedure)UE发起的关机去附着(Detachprocedure)Spec23.40.1UE-initiatedDetachprocedureforE-UTRAN

.2UE-initiatedDetachprocedureforGERAN/UTRANwithISRactivated

Spec23.40MME-initiatedDetachprocedure

Spec23.40ASGSN-initiatedDetachprocedurewithISRactivated

Spec23.40HSS-initiatedDetachprocedure专用承载建立Dedicatedbeareractivation

(Spec23.4015.4.1)

UE触发的专用承载建立流程UE

请求BearerResource修改

(Spec23.4015.4.5)

参考建立流程图5.4.1专用承载修改流程修改QoS不修改QoS只修改TFTP-GW触发专用承载释放Dedicatedbearerdeactivation

(Spec23.40)

MME触发专用承载释放Dedicatedbearerdeactivation

(Spec23.40)

专用承载释放流程PDNGWinitiatedbearermodificationwithbearerQoSupdate

(Spec23.401

)

HSSInitiatedSubscribedQoSModification

(Spec23.401

)

PDNGWinitiatedbearermodificationwithoutbearerQoSupdate

(5.4.3)

切换流程的基本空口信令MeasurementreportRRCreconfigurationRRCreconfigurationcomplete要注意的是RRCReconfiguration和Reconfigurationcomplete是在与不同的eNB交互.2基于S1切换的正常流程Spec23.401Spec23.401

.3基于S1切换的异常流程(拒绝)Spec23.401

.2S-GW不变的基于X2切换Spec23.401

.3S-GW改变的基于X2切换Spec23.401

.2E-UTRANtoUTRANHandoverPreparationphase

Spec23.401

.3E-UTRANtoUTRANHandoverExecutionphase

Spec23.401

.4E-UTRANtoUTRANHandoverReject

Spec23.401

.2UTRANtoE-UTRANHandoverPreparationphase

Spec23.401

.3UTRANtoE-UTRANHandoverExecutionphase

Spec23.401

.4UTRANtoE-UTRANHandoverReject

Spec23.401

.2E-UTRANtoGERANHandoverPreparationphase

Spec23.401

.3E-UTRANtoGERANHand