LTE信令流程概要PPT课件

-,1,LTE层3信令流程概要和StatesMachine,-,2,E-UTRAN控制面协议栈,GTP-C,UDP,L2,L1,IP,PDN/S-GW,29.274,-,3,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,-,4,NASEPSMM信令流程概要(Spec24.301),Commonprocedures5.4.1GUTIreallocationprocedure5.4.2Authenticationprocedure5.4.3Securitymodecontrolprocedure5.4.4Identificationprocedure5.4.5EMMinformationprocedureSpecificprocedures5.5.1AttachprocedureAttachprocedureforEPSservicesCombinedattachprocedureforEPSservicesandnon-EPSservices5.5.2DetachprocedureUEinitiateddetachprocedureNetworkinitiateddetachprocedure5.5.3TrackingareaupdatingprocedureNormalandperiodictrackingareaupdatingprocedureCombinedtrackingareaupdatingprocedureConnectionmanagement(ECM)procedures5.6.1Servicerequestprocedure5.6.2Pagingprocedure5.6.3TransportofNASmessagesprocedure5.6.4GenerictransportofNASmessagesprocedure,-,5,NetworkinitiatedESMprocedures(ProceduresrelatedtoEPSbearercontexts)6.4.1DefaultEPSbearercontextactivationprocedure6.4.2DedicatedEPSbearercontextactivationprocedure6.4.3EPSbearercontextmodificationprocedure6.4.4EPSbearercontextdeactivationprocedureUErequestedESMprocedures(Transactionrelatedprocedures)6.5.1UErequestedPDNconnectivityprocedure6.5.2UErequestedPDNdisconnectprocedure6.5.3UErequestedbearerresourceallocationprocedure6.5.4UErequestedbearerresourcemodificationprocedureMiscellaneousproceduresESMinformationrequestprocedureExchangeofprotocolconfigurationoptionsinothermessages6.6.2Notificationprocedure,NASEPSSM信令流程概要(Spec24.301),-,6,S1-AP信令流程概要Class1(Spec36.413),Class1:ElementaryProcedureswithresponse(successand/orfailure).,-,7,S1-AP信令流程概要Class2(Spec36.413),Class2:ElementaryProcedureswithoutresponse,-,8,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.,-,9,RRCSRB定义(Spec36.3314.2.2),4.2.2SignallingradiobearersSignallingRadioBearers(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.Spec24.30,-,10,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.,-,11,RRCConnection(Sub-)StatesforUE,InitialstatePowerOnSystemAcquisition,IdleStateCell(re-)selectionMeasurementsPaging,Connectedstate,LimitedconnectivityNouserplaneNoHONoSecurity,ReadyforfullconnectivitySecurity,FullyConnectedUserplaneHOSecurity,Release,ConnRequest,ConnFailure,SecurityActivation,SecurityFailure,Reconfiguration,ConnectionRe-establishment,Failure,Successfulconnectionre-establishment,Re-establishmentFailure,-,12,EMMmainstatesintheUE(Spec24.30.2.7),-,13,EMMmainstatesintheMME(Spec24.30.4),-,14,EPSConnectionManagement(ECM)状态(Spec23.401),ECM-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.WhentheUEandtheMMEentertheECMCONNECTEDstate,thesetofEPSBearersissynchronizedbetweentheUEandnetwork.ECM-CONNECTEDTheUElocationisknownintheMMEwithanaccuracyofaservingeNodeBID.ThemobilityofUEishandledbythehandoverprocedure.TheUEperformsthetrackingareaupdateprocedurewhentheTAIintheEMMsysteminformationisnotinthelistofTAsthattheUEregisteredwiththenetwork,orwhentheUEhandoverstoanEUTRANcellandtheUEsTINindicatesP-TMSI.ForaUEintheECM-CONNECTEDstate,thereexistsasignallingconnectionbetweentheUEandtheMME.Thesignallingconnectionismadeupoftwoparts:anRRCconnectionandanS1_MMEconnection.TheUEshallentertheECM-IDLEstatewheni