LTE信令流程概要.ppt

LTE层3信令流程概要和StatesMachine E UTRAN 控制面协议栈 GTP C UDP L2 L1 IP PDN S GW 29 274 RRC信令流程概要 Spec36 331 5 2SysteminformationConnectioncontrol5 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 4CSFBto1xParametertransfer NASEPSMM信令流程概要 Spec24 301 Commonprocedures5 4 1GUTIreallocationprocedure5 4 2Authenticationprocedure5 4 3Securitymodecontrolprocedure5 4 4Identificationprocedure5 4 5EMMinformationprocedureSpecificprocedures5 5 1Attachprocedure5 5 1 2AttachprocedureforEPSservices5 5 1 3CombinedattachprocedureforEPSservicesandnon EPSservices5 5 2Detachprocedure5 5 2 2UEinitiateddetachprocedure5 5 2 3Networkinitiateddetachprocedure5 5 3Trackingareaupdatingprocedure5 5 3 2Normalandperiodictrackingareaupdatingprocedure5 5 3 3CombinedtrackingareaupdatingprocedureConnectionmanagement ECM procedures5 6 1Servicerequestprocedure5 6 2Pagingprocedure5 6 3TransportofNASmessagesprocedure5 6 4GenerictransportofNASmessagesprocedure NetworkinitiatedESMprocedures ProceduresrelatedtoEPSbearercontexts 6 4 1DefaultEPSbearercontextactivationprocedure6 4 2DedicatedEPSbearercontextactivationprocedure6 4 3EPSbearercontextmodificationprocedure6 4 4EPSbearercontextdeactivationprocedureUErequestedESMprocedures Transactionrelatedprocedures 6 5 1UErequestedPDNconnectivityprocedure6 5 2UErequestedPDNdisconnectprocedure6 5 3UErequestedbearerresourceallocationprocedure6 5 4UErequestedbearerresourcemodificationprocedureMiscellaneousprocedures6 6 1 2ESMinformationrequestprocedure6 6 1 3Exchangeofprotocolconfigurationoptionsinothermessages6 6 2Notificationprocedure NASEPSSM信令流程概要 Spec24 301 S1 AP信令流程概要Class1 Spec36 413 Class1 ElementaryProcedureswithresponse successand orfailure S1 AP信令流程概要Class2 Spec36 413 Class2 ElementaryProcedureswithoutresponse RRC状态 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 RRCSRB定义 Spec36 3314 2 2 4 2 2Signallingradiobearers 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 3015 3 1 1 2020 3 15 10 可编辑 RRC状态 Spec36 300 RRC IDLE PLMNselection DRXconfiguredbyNAS Broadcastofsysteminformation Paging Cellre selectionmobility TheUEshallhavebeenallocatedanidwhichuniquelyidentifiestheUEinatrackingarea NoRRCcontextstoredintheeNB RRC 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 RRCConnection Sub StatesforUE InitialstatePowerOnSystemAcquisition IdleStateCell re selectionMeasurementsPaging Connectedstate LimitedconnectivityNouserplaneNoHONoSecurity Readyforfullconnectivity Security FullyConnectedUserplaneHOSecurity Release ConnRequest ConnFailure SecurityActivation SecurityFailure Reconfiguration ConnectionRe establishment Failure Successfulconnectionre establishment Re establishmentFailure EMMmainstatesintheUE Spec24 3015 1 3 2 2 7 EMMmainstatesintheMME Spec24 3015 1 3 4 4 EPSConnectionManagement ECM 状态 Spec23 401 4 6 3 1ECM IDLEAUEisinECM IDLEstatewhennoNASsignallingconnectionbetweenUEandnetworkexists InECM IDLEstate aUEperformscellselection reselectionaccordingtoTS36 304 34 andPLMNselectionaccordingtoTS23 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 4 6 3 2ECM CONNECTEDTheUElocationisknownintheMMEwithanaccuracyofaservingeNodeBID ThemobilityofUEishandledbythehandoverprocedure TheUEperformsthetrackingareaupdateprocedurewhentheTAIintheEMMsysteminformationisnotinthelistofTA sthattheUEregisteredwiththenetwork orwhentheUEhandoverstoanE UTRANcellandtheUE sTINindicates P TMSI ForaUEintheECM CONNECTEDstate thereexistsasignallingconnectionbetweentheUEandtheMME Thesignallingconnectionismadeupoftwoparts anRRCconnectionandanS1 MMEconnection TheUEshallentertheECM IDLEstatewhenitssigna