LTE信令流程概要課件

LTE層3信令流程概要和StatesMachineLTE層3信令流程概要和StatesMachine1E-UTRAN–控制面協(xié)議棧RRCPDCPRLCMACPHYRRCPDCPRLCMACPHYS1APX2APSCTPL2L1IPS1APX2APSCTPL2L1IPNASNASUEeNodeBMME/eNodeB24.30136.33136.32336.32236.32136.211~36.21436.41336.42336.41236.422S1-MME/X2-CLTE-UuGTP-CUDPL2L1IPPDN/S-GW29.274E-UTRAN–控制面協(xié)議棧RRCPDCPRLCMACP2RRC信令流程概要(Spec36.331)5.2 SysteminformationConnectioncontrol5.3.2 Paging5.3.3 RRCconnectionestablishment5.3.4 Initialsecurityactivation5.3.5 RRCconnectionreconfiguration5.3.6 Countercheck5.3.7 RRCconnectionre-establishment5.3.8 RRCconnectionrelease5.3.9 RRCconnectionreleaserequestedbyupperlayers5.3.10 Radioresourceconfiguration5.3.11 Radiolinkfailurerelatedactions5.3.12 UEactionsuponleavingRRC_CONNECTED5.3.13 UEactionsuponPUCCH/SRSreleaserequest5.4 Inter-RATmobility5.5 MeasurementsOther5.6.1 DLinformationtransfer5.6.2 ULinformationtransfer5.6.3 UEcapabilitytransfer5.6.4 CSFBto1xParametertransferRRC信令流程概要(Spec36.331)5.2 S3NASEPSMM信令流程概要(Spec24.301)Commonprocedures5.4.1 GUTIreallocationprocedure5.4.2 Authenticationprocedure5.4.3 Securitymodecontrolprocedure5.4.4 Identificationprocedure5.4.5 EMMinformationprocedureSpecificprocedures

5.5.1 Attachprocedure AttachprocedureforEPSservices CombinedattachprocedureforEPSservicesandnon-EPSservices 5.5.2 Detachprocedure UEinitiateddetachprocedure Networkinitiateddetachprocedure5.5.3 Trackingareaupdatingprocedure

Normalandperiodictrackingareaupdatingprocedure CombinedtrackingareaupdatingprocedureConnectionmanagement(ECM)procedures

5.6.1 Servicerequestprocedure5.6.2 Pagingprocedure5.6.3 TransportofNASmessagesprocedure5.6.4 GenerictransportofNASmessagesprocedureNASEPSMM信令流程概要(Spec24.3014NetworkinitiatedESMprocedures(ProceduresrelatedtoEPSbearercontexts)6.4.1 DefaultEPSbearercontextactivationprocedure6.4.2 DedicatedEPSbearercontextactivationprocedure6.4.3 EPSbearercontextmodificationprocedure6.4.4 EPSbearercontextdeactivationprocedureUErequestedESMprocedures(Transactionrelatedprocedures)6.5.1 UErequestedPDNconnectivityprocedure6.5.2 UErequestedPDNdisconnectprocedure6.5.3 UErequestedbearerresourceallocationprocedure6.5.4 UErequestedbearerresourcemodificationprocedureMiscellaneousprocedures ESMinformationrequestprocedure Exchangeofprotocolconfigurationoptionsinothermessages6.6.2 NotificationprocedureNASEPSSM信令流程概要(Spec24.301)NetworkinitiatedESMprocedur5S1-AP信令流程概要Class1(Spec36.413)ElementaryProcedureInitiatingMessageSuccessfulOutcomeUnsuccessfulOutcomeResponsemessageResponsemessageHandoverPreparationHANDOVERREQUIREDHANDOVERCOMMANDHANDOVERPREPARATIONFAILUREHandoverResourceAllocationHANDOVERREQUESTHANDOVERREQUESTACKNOWLEDGEHANDOVERFAILUREPathSwitchRequestPATHSWITCHREQUESTPATHSWITCHREQUESTACKNOWLEDGEPATHSWITCHREQUESTFAILUREHandoverCancellationHANDOVERCANCELHANDOVERCANCELACKNOWLEDGEE-RABSetupE-RABSETUPREQUESTE-RABSETUPRESPONSEE-RABModifyE-RABMODIFYREQUESTE-RABMODIFYRESPONSEE-RABReleaseE-RABRELEASECOMMANDE-RABRELEASERESPONSEInitialContextSetupINITIALCONTEXTSETUPREQUESTINITIALCONTEXTSETUPRESPONSEINITIALCONTEXTSETUPFAILUREResetRESETRESETACKNOWLEDGES1SetupS1SETUPREQUESTS1SETUPRESPONSES1SETUPFAILUREUEContextReleaseUECONTEXTRELEASECOMMANDUECONTEXTRELEASECOMPLETEUEContextModificationUECONTEXTMODIFICATIONREQUESTUECONTEXTMODIFICATIONRESPONSEUECONTEXTMODIFICATIONFAILUREeNBConfigurationUpdateENBCONFIGURATIONUPDATEENBCONFIGURATIONUPDATEACKNOWLEDGEENBCONFIGURATIONUPDATEFAILUREMMEConfigurationUpdateMMECONFIGURATIONUPDATEMMECONFIGURAIONUPDATEACKNOWLEDGEMMECONFIGURATIONUPDATEFAILUREWrite-ReplaceWarningWRITE-REPLACEWARNINGREQUESTWRITE-REPLACEWARNINGRESPONSEClass1:ElementaryProcedureswithresponse(successand/orfailure).

S1-AP信令流程概要Class1(Spec36.6S1-AP信令流程概要Class2(Spec36.413)ElementaryProcedureMessageHandoverNotificationHANDOVERNOTIFYE-RABReleaseIndicationE-RABRELEASEINDICATIONPagingPAGINGInitialUEMessageINITIALUEMESSAGEDownlinkNASTransportDOWNLINKNASTRANSPORTUplinkNASTransportUPLINKNASTRANSPORTNASnondeliveryindicationNASNONDELIVERYINDICATIONErrorIndicationERRORINDICATIONUEContextReleaseRequestUECONTEXTRELEASEREQUESTDownlinkS1CDMA2000TunnelingDOWNLINKS1CDMA2000TUNNELINGUplinkS1CDMA2000TunnelingUPLINKS1CDMA2000TUNNELINGUECapabilityInfoIndicationUECAPABILITYINFOINDICATIONeNBStatusTransfereNBSTATUSTRANSFERMMEStatusTransferMMESTATUSTRANSFERDeactivateTraceDEACTIVATETRACETraceStartTRACESTARTTraceFailureIndicationTRACEFAILUREINDICATIONLocationReportingControlLOCATIONREPORTINGCONTROLLocationReportingFailureIndicationLOCATIONREPORTINGFAILUREINDICATIONLocationReportLOCATIONREPORTOverloadStartOVERLOADSTARTOverloadStopOVERLOADSTOPeNBDirectInformationTransfereNBDIRECTINFORMATIONTRANSFERMMEDirectInformationTransferMMEDIRECTINFORMATIONTRANSFEReNBConfigurationTransfereNBCONFIGURATIONTRANSFERMMEConfigurationTransferMMECONFIGURATIONTRANSFERCellTrafficTraceCELLTRAFFICTRACEClass2:ElementaryProcedureswithoutresponse

S1-AP信令流程概要Class2(Spec36.7RRC狀態(tài)(Spec36.3314.2.1)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狀態(tài)(Spec36.3314.2.1)RRC8RRCSRB定義(Spec36.3314.2.2)4.2.2 Signallingradiobearers"SignallingRadioBearers"(SRBs)aredefinedasRadioBearers(RB)thatareusedonlyforthetransmissionofRRCandNASmessages.Morespecifically,thefollowingthreeSRBsaredefined:- SRB0isforRRCmessagesusingtheCCCHlogicalchannel;- SRB1isforRRCmessages(whichmayincludeapiggybackedNASmessage)aswellasforNASmessagespriortotheestablishmentofSRB2,allusingDCCHlogicalchannel;SRB2isforNASmessages,usingDCCHlogicalchannel.SRB2hasalower-prioritythanSRB1andisalwaysconfiguredbyE-UTRANaftersecurityactivation.IndownlinkpiggybackingofNASmessagesisusedonlyforonedependant(i.e.withjointsuccess/failure)procedure:bearerestablishment/modification/release.InuplinkNASmessagepiggybackingisusedonlyfortransferringtheinitialNASmessageduringconnectionsetup.NOTE: TheNASmessagestransferredviaSRB2arealsocontainedinRRCmessages,whichhoweverdonotincludeanyRRCprotocolcontrolinformation.Oncesecurityisactivated,allRRCmessagesonSRB1andSRB2,includingthosecontainingNASornon-3GPPmessages,areintegrityprotectedandcipheredbyPDCP.NASindependentlyappliesintegrityprotectionandcipheringtotheNASmessages.InitialNASmessagesare:- ATTACHREQUEST;- DETACHREQUEST;- TRACKINGAREAUPDATEREQUEST;- SERVICEREQUEST;andEXTENDEDSERVICEREQUEST.Spec24.30RRCSRB定義(Spec36.3314.2.2)9RRC狀態(tài)(Spec36.300)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狀態(tài)(Spec36.300)RRC_IDLE:10RRCConnection(Sub-)StatesforUEInitialstatePowerOnSystemAcquisitionIdleStateCell(re-)selectionMeasurementsPagingConnectedstateLimitedconnectivity

NouserplaneNoHONoSecurityReadyforfullconnectivity

>SecurityFullyConnected

UserplaneHOSecurityReleaseConnRequestConnFailureSecurityActivationSecurityFailureReconfigurationConnectionRe-establishmentFailureSuccessfulconnectionre-establishmentRe-establishmentFailureRRCConnection(Sub-)Statesfo11EMMmainstatesintheUE

(Spec24.30.2.7)EMMmainstatesintheUE(Spe12EMMmainstatesintheMME

(Spec24.30.4)EMMmainstatesintheMME(Sp13EPSConnectionManagement(ECM)狀態(tài)

(Spec23.401) ECM-IDLEAUEisinECM-IDLEstatewhennoNASsignallingconnectionbetweenUEandnetworkexists.InECM-IDLEstate,aUEperformscellselection/reselectionaccordingtoTS

36.304

[34]andPLMNselectionaccordingtoTS

23.122

[10].ThereexistsnoUEcontextinE-UTRANfortheUEintheECM-IDLEstate.ThereisnoS1_MMEandnoS1_UconnectionfortheUEintheECM-IDLEstate.IntheEMM-REGISTEREDandECM-IDLEstate,theUEshall:--performatrackingareaupdateifthecurrentTAisnotinthelistofTAsthattheUEhasreceivedfromthenetworkinordertomaintaintheregistrationandenabletheMMEtopagetheUE;--performtheperiodictrackingareaupdatingproceduretonotifytheEPCthattheUEisavailable;--performatrackingareaupdateiftheRRCconnectionwasreleasedwithreleasecause"loadbalancingTAUrequired";--performatrackingareaupdatewhentheUEreselectsanE-UTRANcellandtheUE'sTINindicates"P-TMSI";--performatrackingareaupdateforachangeoftheUE'sCoreNetworkCapabilityinformationortheUEspecificDRXparameter;--performatrackingareaupdatewhentheUEmanuallyselectsaCSGcell,andtheCSGIDofthatcellisabsentfromboththeUE'sAllowedCSGlistandtheUE'sOperatorCSGlist;--answertopagingfromtheMMEbyperformingaservicerequestprocedure;--performtheservicerequestprocedureinordertoestablishtheradiobearerswhenuplinkuserdataistobesent.TheUEandtheMMEshallentertheECM-CONNECTEDstatewhenthesignallingconnectionisestablishedbetweentheUEandtheMME.InitialNASmessagesthatinitiateatransitionfromECM-IDLEtoECM-CONNECTEDstateareAttachRequest,TrackingAreaUpdateRequest,ServiceRequestorDetachRequest.WhentheUEisinECM?IDLEstate,theUEandthenetworkmaybeunsynchronized,i.e.theUEandthenetworkmayhavedifferentsetsofestablishedEPSbearers.WhentheUEandtheMMEentertheECM?CONNECTEDstate,thesetofEPSBearersissynchronizedbetweentheUEandnetwork. ECM-CONNECTEDTheUElocationisknownintheMMEwithanaccuracyofaservingeNodeBID.ThemobilityofUEishandledbythehandoverprocedure.TheUEperformsthetrackingareaupdateprocedurewhentheTAIintheEMMsysteminformationisnotinthelistofTA'sthattheUEregisteredwiththenetwork,orwhentheUEhandoverstoanE?UTRANcellandtheUE'sTINindicates"P-TMSI".ForaUEintheECM-CONNECTEDstate,thereexistsasignallingconnectionbetweentheUEandtheMME.Thesignallingconnectionismadeupoftwoparts:anRRCconnectionandanS1_MMEconnection.TheUEshallentertheECM-IDLEstatewhenitssignallingconnectiontotheMMEhasbeenreleasedorbroken.ThisreleaseorfailureisexplicitlyindicatedbytheeNodeBtotheUEordetectedbytheUE.TheS1releaseprocedurechangesthestateatbothUEandMMEfromECM-CONNECTEDtoECM-IDLE.NOTE

1: TheUEmaynotreceivetheindicationfortheS1release,e.g.duetoradiolinkerrororoutofcoverage.Inthiscase,therecanbetemporalmismatchbetweentheECM-stateintheUEandtheECM-stateintheMME.Afterasignallingprocedure,theMMEmaydecidetoreleasethesignallingconnectiontotheUE,afterwhichthestateatboththeUEandtheMMEischangedtoECM-IDLE.NOTE

2: TherearesomeabnormalcaseswheretheUEtransitionstoECM-IDLE.WhenaUEchangestoECM?CONNECTEDstateandifaradiobearercannotbeestablished,ortheUEcannotmaintainabearerintheECM-CONNECTEDstateduringhandovers,thecorrespondingEPSbearerisdeactivated.EPSConnectionManagement(ECM14EPSConnectionManagement(ECM)狀態(tài)

(Spec23.4014.6.4)EPSConnectionManagement(ECM15RRCECMEMM狀態(tài)關(guān)系RRCECMEMM狀態(tài)關(guān)系16EPSSessionManagement(ESM)狀態(tài)

(Spec24.301)EPSSessionManagement(ESM)狀態(tài)17LTE層3信令流程概要和StatesMachineLTE層3信令流程概要和StatesMachine18E-UTRAN–控制面協(xié)議棧RRCPDCPRLCMACPHYRRCPDCPRLCMACPHYS1APX2APSCTPL2L1IPS1APX2APSCTPL2L1IPNASNASUEeNodeBMME/eNodeB24.30136.33136.32336.32236.32136.211~36.21436.41336.42336.41236.422S1-MME/X2-CLTE-UuGTP-CUDPL2L1IPPDN/S-GW29.274E-UTRAN–控制面協(xié)議棧RRCPDCPRLCMACP19RRC信令流程概要(Spec36.331)5.2 SysteminformationConnectioncontrol5.3.2 Paging5.3.3 RRCconnectionestablishment5.3.4 Initialsecurityactivation5.3.5 RRCconnectionreconfiguration5.3.6 Countercheck5.3.7 RRCconnectionre-establishment5.3.8 RRCconnectionrelease5.3.9 RRCconnectionreleaserequestedbyupperlayers5.3.10 Radioresourceconfiguration5.3.11 Radiolinkfailurerelatedactions5.3.12 UEactionsuponleavingRRC_CONNECTED5.3.13 UEactionsuponPUCCH/SRSreleaserequest5.4 Inter-RATmobility5.5 MeasurementsOther5.6.1 DLinformationtransfer5.6.2 ULinformationtransfer5.6.3 UEcapabilitytransfer5.6.4 CSFBto1xParametertransferRRC信令流程概要(Spec36.331)5.2 S20NASEPSMM信令流程概要(Spec24.301)Commonprocedures5.4.1 GUTIreallocationprocedure5.4.2 Authenticationprocedure5.4.3 Securitymodecontrolprocedure5.4.4 Identificationprocedure5.4.5 EMMinformationprocedureSpecificprocedures

5.5.1 Attachprocedure AttachprocedureforEPSservices CombinedattachprocedureforEPSservicesandnon-EPSservices 5.5.2 Detachprocedure UEinitiateddetachprocedure Networkinitiateddetachprocedure5.5.3 Trackingareaupdatingprocedure

Normalandperiodictrackingareaupdatingprocedure CombinedtrackingareaupdatingprocedureConnectionmanagement(ECM)procedures

5.6.1 Servicerequestprocedure5.6.2 Pagingprocedure5.6.3 TransportofNASmessagesprocedure5.6.4 GenerictransportofNASmessagesprocedureNASEPSMM信令流程概要(Spec24.30121NetworkinitiatedESMprocedures(ProceduresrelatedtoEPSbearercontexts)6.4.1 DefaultEPSbearercontextactivationprocedure6.4.2 DedicatedEPSbearercontextactivationprocedure6.4.3 EPSbearercontextmodificationprocedure6.4.4 EPSbearercontextdeactivationprocedureUErequestedESMprocedures(Transactionrelatedprocedures)6.5.1 UErequestedPDNconnectivityprocedure6.5.2 UErequestedPDNdisconnectprocedure6.5.3 UErequestedbearerresourceallocationprocedure6.5.4 UErequestedbearerresourcemodificationprocedureMiscellaneousprocedures ESMinformationrequestprocedure Exchangeofprotocolconfigurationoptionsinothermessages6.6.2 NotificationprocedureNASEPSSM信令流程概要(Spec24.301)NetworkinitiatedESMprocedur22S1-AP信令流程概要Class1(Spec36.413)ElementaryProcedureInitiatingMessageSuccessfulOutcomeUnsuccessfulOutcomeResponsemessageResponsemessageHandoverPreparationHANDOVERREQUIREDHANDOVERCOMMANDHANDOVERPREPARATIONFAILUREHandoverResourceAllocationHANDOVERREQUESTHANDOVERREQUESTACKNOWLEDGEHANDOVERFAILUREPathSwitchRequestPATHSWITCHREQUESTPATHSWITCHREQUESTACKNOWLEDGEPATHSWITCHREQUESTFAILUREHandoverCancellationHANDOVERCANCELHANDOVERCANCELACKNOWLEDGEE-RABSetupE-RABSETUPREQUESTE-RABSETUPRESPONSEE-RABModifyE-RABMODIFYREQUESTE-RABMODIFYRESPONSEE-RABReleaseE-RABRELEASECOMMANDE-RABRELEASERESPONSEInitialContextSetupINITIALCONTEXTSETUPREQUESTINITIALCONTEXTSETUPRESPONSEINITIALCONTEXTSETUPFAILUREResetRESETRESETACKNOWLEDGES1SetupS1SETUPREQUESTS1SETUPRESPONSES1SETUPFAILUREUEContextReleaseUECONTEXTRELEASECOMMANDUECONTEXTRELEASECOMPLETEUEContextModificationUECONTEXTMODIFICATIONREQUESTUECONTEXTMODIFICATIONRESPONSEUECONTEXTMODIFICATIONFAILUREeNBConfigurationUpdateENBCONFIGURATIONUPDATEENBCONFIGURATIONUPDATEACKNOWLEDGEENBCONFIGURATIONUPDATEFAILUREMMEConfigurationUpdateMMECONFIGURATIONUPDATEMMECONFIGURAIONUPDATEACKNOWLEDGEMMECONFIGURATIONUPDATEFAILUREWrite-ReplaceWarningWRITE-REPLACEWARNINGREQUESTWRITE-REPLACEWARNINGRESPONSEClass1:ElementaryProcedureswithresponse(successand/orfailure).

S1-AP信令流程概要Class1(Spec36.23S1-AP信令流程概要Class2(Spec36.413)ElementaryProcedureMessageHandoverNotificationHANDOVERNOTIFYE-RABReleaseIndicationE-RABRELEASEINDICATIONPagingPAGINGInitialUEMessageINITIALUEMESSAGEDownlinkNASTransportDOWNLINKNASTRANSPORTUplinkNASTransportUPLINKNASTRANSPORTNASnondeliveryindicationNASNONDELIVERYINDICATIONErrorIndicationERRORINDICATIONUEContextReleaseRequestUECONTEXTRELEASEREQUESTDownlinkS1CDMA2000TunnelingDOWNLINKS1CDMA2000TUNNELINGUplinkS1CDMA2000TunnelingUPLINKS1CDMA2000TUNNELINGUECapabilityInfoIndicationUECAPABILITYINFOINDICATIONeNBStatusTransfereNBSTATUSTRANSFERMMEStatusTransferMMESTATUSTRANSFERDeactivateTraceDEACTIVATETRACETraceStartTRACESTARTTraceFailureIndicationTRACEFAILUREINDICATIONLocationReportingControlLOCATIONREPORTINGCONTROLLocationReportingFailureIndicationLOCATIONREPORTINGFAILUREINDICATIONLocationReportLOCATIONREPORTOverloadStartOVERLOADSTARTOverloadStopOVERLOADSTOPeNBDirectInformationTransfereNBDIRECTINFORMATIONTRANSFERMMEDirectInformationTransferMMEDIRECTINFORMATIONTRANSFEReNBConfigurationTransfereNBCONFIGURATIONTRANSFERMMEConfigurationTransferMMECONFIGURATIONTRANSFERCellTrafficTraceCELLTRAFFICTRACEClass2:ElementaryProcedureswithoutresponse

S1-AP信令流程概要Class2(Spec36.24RRC狀態(tài)(Spec36.3314.2.1)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狀態(tài)(Spec36.3314.2.1)RRC25RRCSRB定義(Spec36.3314.2.2)4.2.2 Signallingradiobearers"SignallingRadioBearers"(SRBs)aredefinedasRadioBearers(RB)thatareusedonlyforthetransmissionofRRCandNASmessages.Morespecifically,thefollowingthreeSRBsaredefined:- SRB0isforRRCmessagesusingtheCCCHlogicalchannel;- SRB1isforRRCmessages(whichmayincludeapiggybackedNASmessage)aswellasforNASmessagespriortotheestablishmentofSRB2,allusingDCCHlogicalchannel;SRB2isforNASmessages,usingDCCHlogicalchannel.SRB2hasalower-prioritythanSRB1andisalwaysconfiguredbyE-UTRANaftersecurityactivation.IndownlinkpiggybackingofNASmessagesisusedonlyforonedependant(i.e.withjointsuccess/failure)procedure:bearerestablishment/modification/release.InuplinkNASmessagepiggybackingisusedonlyfortransferringtheinitialNASmessageduringconnectionsetup.NOTE: TheNASmessagestransferredviaSRB2arealsocontainedinRRCmessages,whichhoweverdonotincludeanyRRCprotocolcontrolinformation.Oncesecurityisactivated,allRRCmessagesonSRB1andSRB2,includingthosecontainingNASornon-3GPPmessages,areintegrityprotectedandcipheredbyPDCP.NASindependentlyappliesintegrityprotectionandcipheringtotheNASmessages.InitialNASmessagesare:- ATTACHREQUEST;- DETACHREQUEST;- TRACKINGAREAUPDATEREQUEST;- SERVICEREQUEST;andEXTENDEDSERVICEREQUEST.Spec24.30RRCSRB定義(Spec36.3314.2.2)26RRC狀態(tài)(Spec36.300)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狀態(tài)(Spec36.300)RRC_IDLE:27RRCConnection(Sub-)StatesforUEInitialstatePowerOnSystemAcquisitionIdleStateCell(re-)selectionMeasurementsPagingConnectedstateLimitedconnectivity

NouserplaneNoHONoSecurityReadyforfullconnectivity

>SecurityFullyConnected

UserplaneHOSecurityReleaseConnRequestConnFailureSecurityActivationSecurityFailureReconfigurationConnectionRe-establishmentFailureSuccessfulconnectionre-establishmentRe-establishmentFailureRRCConnection(Sub-)Statesfo28EMMmainstatesintheUE

(Spec24.30.2.7)EMMmainstatesintheUE(Spe29EMMmainstatesintheMME

(Spec24.30.4)EMMmainstatesintheMME(Sp30EPSConnectionManagement(ECM)狀態(tài)

(Spec23.401) ECM-IDLEAUEisinECM-IDLEstatewhennoNASsignallingconnectionbetweenUEandnetworkexists.InECM-IDLEstate,aUEperformscellselection/reselectionaccordingtoTS

36.304

[34]andPLMNselectionaccordingtoTS

23.122

[10].ThereexistsnoUEcontextinE-UTRANfortheUEintheECM-IDLEstate.ThereisnoS1_MMEandnoS1_UconnectionfortheUEintheECM-IDLEstate.IntheEMM-REGISTEREDandECM-IDLEstate,theUEshall:--performatrackingareaupdateifthecurrentTAisnotinthelistofTAsthattheUEhasreceivedfromthenetworkinordertomaintaintheregistrationandenabletheMMEtopagetheUE;--performtheperiodictrackingareaupdatingproceduretonotifytheEPCthattheUEisavailable;--performatrackingareaupdateiftheRRCconnectionwasreleasedwithreleasecause"loadbalancingTAUrequired";--performatrackingareaupdatewhentheUEreselectsanE-UTRANcellandtheUE'sTINindicates"P-TMSI";--performatrackingareaupdateforachangeoftheUE'sCoreNetworkCapabilityinformationortheUEspecificDRXparameter;--perfor