LTE信令流程概要课件

LTE层3信令流程概要信令流程概要和StatesMachineLTE层3信令流程概要和StatesMachine1E-UTRAN控制面协议栈RRCPDCPRLCMACPHYRRCPDCPRLCMACPHYS1APX2APSCTPL2L1IPS1APX2APSCTPL2L1IPNASNASUEeNodeB MME/eNodeB24.30136.33136.32336.32236.32136.21136.21436.41336.42336.41236.422S1-MME/X2-CLTE-UuGTP-CUDPL2L1IPPDN/S-GW29.274E-UTRAN控制面协议栈RRCPDCPRLCMACP2RRC 信令流程概要信令流程概要(Spec 36.331)5.2SysteminformationConnection control5.3.2Paging5.3.3RRCconnectionestablishment5.3.4Initialsecurityactivation5.3.5RRCconnectionreconfiguration5.3.6Countercheck5.3.7RRCconnectionre-establishment5.3.8RRCconnectionrelease5.3.9RRCconnectionreleaserequestedbyupperlayers5.3.10Radioresourceconfiguration5.3.11Radiolinkfailurerelatedactions5.3.12UEactionsuponleavingRRC_CONNECTED5.3.13UEactionsuponPUCCH/SRSreleaserequest5.4Inter-RATmobility5.5MeasurementsOther5.6.1DLinformationtransfer5.6.2ULinformationtransfer5.6.3UEcapabilitytransfer5.6.4CSFBto1xParametertransferRRC信令流程概要(Spec36.331)5.2S3NAS EPS MM 信令流程概要信令流程概要(Spec 24.301)Common procedures5.4.1GUTIreallocationprocedure5.4.2Authenticationprocedure5.4.3Securitymodecontrolprocedure5.4.4Identificationprocedure5.4.5EMMinformationprocedureSpecific procedures5.5.1Attachprocedure5.5.1.2AttachprocedureforEPSservices5.5.1.3CombinedattachprocedureforEPSservicesandnon-EPSservices5.5.2Detachprocedure5.5.2.2UEinitiateddetachprocedure5.5.2.3Networkinitiateddetachprocedure5.5.3Trackingareaupdatingprocedure5.5.3.2Normalandperiodictrackingareaupdatingprocedure5.5.3.3CombinedtrackingareaupdatingprocedureConnection management(ECM)procedures5.6.1Servicerequestprocedure5.6.2Pagingprocedure5.6.3TransportofNASmessagesprocedure5.6.4GenerictransportofNASmessagesprocedureNASEPSMM信令流程概要(Spec24.3014NetworkinitiatedESMprocedures(ProceduresrelatedtoEPSbearercontexts)6.4.1DefaultEPSbearercontextactivationprocedure6.4.2DedicatedEPSbearercontextactivationprocedure6.4.3EPSbearercontextmodificationprocedure6.4.4EPSbearercontextdeactivationprocedureUErequestedESMprocedures(Transactionrelatedprocedures)6.5.1UErequestedPDNconnectivityprocedure6.5.2UErequestedPDNdisconnectprocedure6.5.3UErequestedbearerresourceallocationprocedure6.5.4UErequestedbearerresourcemodificationprocedureMiscellaneousprocedures6.6.1.2 ESMinformationrequestprocedure6.6.1.3 Exchangeofprotocolconfigurationoptionsinothermessages6.6.2NotificationprocedureNAS EPS SM 信令流程概要信令流程概要(Spec 24.301)NetworkinitiatedESMprocedur5S1-AP 信令流程概要信令流程概要 Class 1(Spec 36.413)Elementary ProcedureInitiating MessageSuccessful OutcomeUnsuccessful OutcomeResponse messageResponse messageHandover PreparationHANDOVER REQUIREDHANDOVER COMMANDHANDOVER PREPARATION FAILUREHandover Resource AllocationHANDOVER REQUESTHANDOVER REQUEST ACKNOWLEDGEHANDOVER FAILUREPath Switch RequestPATH SWITCH REQUESTPATH SWITCH REQUEST ACKNOWLEDGEPATH SWITCH REQUEST FAILUREHandover CancellationHANDOVER CANCELHANDOVER CANCEL ACKNOWLEDGEE-RAB SetupE-RAB SETUP REQUESTE-RAB SETUP RESPONSEE-RAB ModifyE-RAB MODIFY REQUESTE-RAB MODIFY RESPONSEE-RAB ReleaseE-RAB RELEASE COMMANDE-RAB RELEASE RESPONSEInitial Context SetupINITIAL CONTEXT SETUP REQUESTINITIAL CONTEXT SETUP RESPONSEINITIAL CONTEXT SETUP FAILUREResetRESETRESET ACKNOWLEDGES1 SetupS1 SETUP REQUESTS1 SETUP RESPONSES1 SETUP FAILUREUE Context ReleaseUE CONTEXT RELEASE COMMANDUE CONTEXT RELEASE COMPLETEUE Context ModificationUE CONTEXT MODIFICATION REQUESTUE CONTEXT MODIFICATION RESPONSEUE CONTEXT MODIFICATION FAILUREeNB Configuration UpdateENB CONFIGURATION UPDATEENB CONFIGURATION UPDATE ACKNOWLEDGEENB CONFIGURATION UPDATE FAILUREMME Configuration UpdateMME CONFIGURATION UPDATEMME CONFIGURAION UPDATE ACKNOWLEDGEMME CONFIGURATION UPDATE FAILUREWrite-Replace Warning WRITE-REPLACE WARNING REQUESTWRITE-REPLACE WARNING RESPONSEClass 1:ElementaryProcedureswithresponse(successand/orfailure).S1-AP信令流程概要Class1(Spec36.6S1-AP 信令流程概要信令流程概要 Class 2(Spec 36.413)Elementary ProcedureMessageHandover NotificationHANDOVER NOTIFYE-RAB Release IndicationE-RAB RELEASE INDICATIONPagingPAGINGInitial UE MessageINITIAL UE MESSAGEDownlink NAS TransportDOWNLINK NAS TRANSPORTUplink NAS TransportUPLINK NAS TRANSPORTNAS non delivery indicationNAS NON DELIVERY INDICATIONError IndicationERROR INDICATIONUE Context Release RequestUE CONTEXT RELEASE REQUESTDownlinkS1 CDMA2000 TunnelingDOWNLINK S1 CDMA2000 TUNNELINGUplink S1 CDMA2000 TunnelingUPLINK S1 CDMA2000 TUNNELINGUE Capability Info IndicationUE CAPABILITY INFO INDICATIONeNB Status TransfereNB STATUS TRANSFERMME Status TransferMME STATUS TRANSFERDeactivate TraceDEACTIVATE TRACETrace StartTRACE STARTTrace Failure IndicationTRACE FAILURE INDICATIONLocation Reporting ControlLOCATION REPORTING CONTROLLocation Reporting Failure IndicationLOCATION REPORTING FAILURE INDICATIONLocation ReportLOCATION REPORTOverload StartOVERLOAD STARTOverload StopOVERLOAD STOPeNB Direct Information TransfereNB DIRECT INFORMATION TRANSFERMME Direct Information TransferMME DIRECT INFORMATION TRANSFEReNB Configuration TransfereNB CONFIGURATION TRANSFERMME Configuration TransferMME CONFIGURATION TRANSFERCell Traffic TraceCELL TRAFFIC TRACEClass 2:ElementaryProcedureswithoutresponseS1-AP信令流程概要Class2(Spec36.7RRC 状态状态(Spec 36.331 4.2.1)RRC_IDLE:AUEspecificDRXmaybeconfiguredbyupperlayers.UEcontrolledmobility;TheUE:MonitorsaPagingchanneltodetectincomingcalls,systeminformationchange,andforETWScapableUEs,ETWSnotification;Performsneighbouringcellmeasurementsandcell(re-)selection;Acquiressysteminformation.RRC_CONNECTED:Transferofunicastdatato/fromUE.Atlowerlayers,theUEmaybeconfiguredwithaUEspecificDRX.Networkcontrolledmobility,i.e.handoverandcellchangeorderwithoptionalnetworkassistance(NACC)toGERAN;TheUE:MonitorsaPagingchanneland/orSystemInformationBlockType1contentstodetectsysteminformationchange,andforETWScapableUEs,ETWSnotification;Monitorscontrolchannelsassociatedwiththeshareddatachanneltodetermineifdataisscheduledforit;Provideschannelqualityandfeedbackinformation;Performsneighbouringcellmeasurementsandmeasurementreporting;Acquiressysteminformation.RRC状态(Spec36.3314.2.1)RRC8RRC SRB 定义定义(Spec 36.331 4.2.2)4.2.2SignallingradiobearersSignallingRadioBearers(SRBs)aredefinedasRadioBearers(RB)thatareusedonlyforthetransmissionofRRCandNASmessages.Morespecifically,thefollowingthreeSRBsaredefined:-SRB0isforRRCmessagesusingtheCCCHlogicalchannel;-SRB1isforRRCmessages(whichmayincludeapiggybackedNASmessage)aswellasforNASmessagespriortotheestablishmentofSRB2,allusingDCCHlogicalchannel;-SRB2isforNASmessages,usingDCCHlogicalchannel.SRB2hasalower-prioritythanSRB1andisalwaysconfiguredbyE-UTRANafter security activation.IndownlinkpiggybackingofNASmessagesisusedonlyforonedependant(i.e.withjointsuccess/failure)procedure:bearerestablishment/modification/release.InuplinkNASmessagepiggybackingisusedonlyfortransferringtheinitial NAS messageduringconnectionsetup.NOTE:TheNASmessagestransferredviaSRB2arealsocontainedinRRCmessages,whichhoweverdonotincludeanyRRCprotocolcontrolinformation.Oncesecurityisactivated,allRRCmessagesonSRB1andSRB2,includingthosecontainingNASornon-3GPPmessages,areintegrityprotectedandcipheredbyPDCP.NASindependentlyappliesintegrityprotectionandcipheringtotheNASmessages.Initial NAS messages are:-ATTACH REQUEST;-DETACH REQUEST;-TRACKING AREA UPDATE REQUEST;-SERVICE REQUEST;and EXTENDED SERVICE REQUEST.Spec 24.301 5.3.1.1RRCSRB定义(Spec36.3314.2.2)9RRC 状态状态(Spec 36.300)RRC_IDLE:-PLMNselection;-DRXconfiguredbyNAS;-Broadcastofsysteminformation;-Paging;-Cellre-selectionmobility;-TheUEshallhavebeenallocatedanidwhichuniquelyidentifiestheUEinatrackingarea;-NoRRCcontextstoredintheeNBRRC_CONNECTED:-UEhasanE-UTRAN-RRCconnection;-UEhascontextinE-UTRAN;-E-UTRANknowsthecellwhichtheUEbelongsto;-Networkcantransmitand/orreceivedatato/fromUE;-Networkcontrolledmobility(handoverandinter-RATcellchangeordertoGERANwithNACC);-Neighbourcellmeasurements;-AtPDCP/RLC/MAClevel:-UEcantransmitand/orreceivedatato/fromnetwork;-UEmonitorscontrolsignallingchannelforshareddatachanneltoseeifanytransmissionovertheshareddatachannelhasbeenallocatedtotheUE;-UEalsoreportschannelqualityinformationandfeedbackinformationtoeNB;-DRXperiodcanbeconfiguredaccordingtoUEactivitylevelforUEpowersavingandefficientresourceutilization.ThisisundercontroloftheeNB.RRC状态(Spec36.300)RRC_IDLE:10RRC Connection(Sub-)States for UEInitialstatePowerOnSystemAcquisitionIdleStateCell(re-)selectionMeasurementsPagingConnectedstateLimitedconnectivityNouserplaneNoHONoSecurityReadyforfullconnectivitySecurityFullyConnectedUserplaneHOSecurityReleaseConn RequestConn FailureSecurity ActivationSecurity FailureReconfigurationConnectionRe-establishmentFailureSuccessful connection re-establishmentRe-establishment FailureRRCConnection(Sub-)Statesfo11EMM main states in the UE(Spec 24.301 5.1.3.2.2.7)EMMmainstatesintheUE(Spe12EMM main states in the MME(Spec 24.301 5.1.3.4.4)EMMmainstatesintheMME(Sp13EPS Connection Management(ECM)状态状态(Spec 23.401)4.6.3.1ECM-IDLEAUEisinECM-IDLEstatewhennoNASsignallingconnectionbetweenUEandnetworkexists.InECM-IDLEstate,aUEperformscellselection/reselectionaccordingtoTS36.30434andPLMNselectionaccordingtoTS23.12210.ThereexistsnoUEcontextinE-UTRANfortheUEintheECM-IDLEstate.ThereisnoS1_MMEandnoS1_UconnectionfortheUEintheECM-IDLEstate.IntheEMM-REGISTEREDandECM-IDLEstate,theUEshall:-performatrackingareaupdateifthecurrentTAisnotinthelistofTAsthattheUEhasreceivedfromthenetworkinordertomaintaintheregistrationandenabletheMMEtopagetheUE;-performtheperiodictrackingareaupdatingproceduretonotifytheEPCthattheUEisavailable;-performatrackingareaupdateiftheRRCconnectionwasreleasedwithreleasecauseloadbalancingTAUrequired;-performatrackingareaupdatewhentheUEreselectsanE-UTRANcellandtheUEsTINindicatesP-TMSI;-performatrackingareaupdateforachangeoftheUEsCoreNetworkCapabilityinformationortheUEspecificDRXparameter;-performatrackingareaupdatewhentheUEmanuallyselectsaCSGcell,andtheCSGIDofthatcellisabsentfromboththeUEsAllowedCSGlistandtheUEsOperatorCSGlist;-answertopagingfromtheMMEbyperformingaservicerequestprocedure;-performtheservicerequestprocedureinordertoestablishtheradiobearerswhenuplinkuserdataistobesent.TheUEandtheMMEshallentertheECM-CONNECTEDstatewhenthesignallingconnectionisestablishedbetweentheUEandtheMME.InitialNASmessagesthatinitiateatransitionfromECM-IDLEtoECM-CONNECTEDstateareAttachRequest,TrackingAreaUpdateRequest,ServiceRequestorDetachRequest.WhentheUEisinECMIDLEstate,theUEandthenetworkmaybeunsynchronized,i.e.theUEandthenetworkmayhavedifferentsetsofestablishedEPSbearers.WhentheUEandtheMMEentertheECM CONNECTEDstate,thesetofEPSBearersissynchronizedbetweentheUEandnetwork.4.6.3.2ECM-CONNECTEDTheUElocationisknownintheMMEwithanaccuracyofaservingeNodeBID.ThemobilityofUEishandledbythehandoverprocedure.TheUEperformsthetrackingareaupdateprocedurewhentheTAIintheEMMsysteminformationisnotinthelistofTAsthattheUEregisteredwiththenetwork,orwhentheUEhandoverstoanEUTRANcellandtheUEsTINindicatesP-TMSI.ForaUEintheECM-CONNECTEDstate,thereexistsasignallingconnectionbetweentheUEandtheMME.Thesignallingconnectionismadeupoftwoparts:anRRCconnectionandanS1_MMEconnection.TheUEshallentertheECM-IDLEstatewhenitssignallingconnectiontotheMMEhasbeenreleasedorbroken.ThisreleaseorfailureisexplicitlyindicatedbytheeNodeBtotheUEordetectedbytheUE.TheS1releaseprocedurechangesthestateatbothUEandMMEfromECM-CONNECTEDtoECM-IDLE.NOTE1:TheUEmaynotreceivetheindicationfortheS1release,e.g.duetoradiolinkerrororoutofcoverage.Inthiscase,therecanbetemporalmismatchbetweentheECM-stateintheUEandtheECM-stateintheMME.Afterasignallingprocedure,theMMEmaydecidetoreleasethesignallingconnectiontotheUE,afterwhichthestateatboththeUEandtheMMEischangedtoECM-IDLE.NOTE2:TherearesomeabnormalcaseswheretheUEtransitionstoECM-IDLE.WhenaUEchangestoECMCONNECTEDstateandifaradiobearercannotbeestablished,ortheUEcannotmaintainabearerintheECM-CONNECTEDstateduringhandovers,thecorrespondingEPSbearerisdeactivated.EPSConnectionManagement(ECM14EPS Connection Management(ECM)状态状态(Spec 23.401 4.6.4)EPSConnectionManagement(ECM15RRC ECM EMM状态关系状态关系RRCECMEMM状态关系16EPS Session Management(ESM)状态状态(Spec 24.301)EPSSessionManagement(ESM)状态17