LTE移动性管理研究-王泽宁

20091010ODERNSCIENCE&TECHNOLOGYOFTELECOMMUNICATIONSM····························LTE。。、LTE。LTE。Abstract:Themobilityinwirelessnetworkreferstothecapabilitytokeepcontinuousconnectionandmaintaincommunicationwhilethelocationofwirelessdeviceschanging.Themobilitymanagementreferstoofferingmobilitymanagementtoprovideusersanddevicescorrespondingfunctionalitytoensureroamingandseamlessmobilityamongheterogeneousnetworks,andkeeptheuserconnectiontothenetworkunderbestcondition.TherehavebeengreatchangesinLTEcorenetworktoaddressthehigh-speedandburstingtrafficsofdataservices,includingflatstructurebeingadopted.Withsucharchitecture,LTEmobilitymanagementhasbecomethefocusofresearchworkforthepurposeofbetterservicetousers.KeyWords:LTEmobilitymanagementEvolvedPacketSystemEPSnon-accessstratusNAS3GPP(LTELongTermEvolution)(SAESystemArchitectureEvolution)。、(EPSEvolvedPacketSystem)、“”。、。LTE。1LTELTELTE1。eNodeBMMEMobilityManagementEntityS1SAE/LTE。S1。S1-UeNodeBSGWServiceGateway。S1-MMEeNodeBMME23MSTTOctober2009eatruesF····························PMIP-PCRF-PSS-PSTN/ISDN1LTES1。eNodeBIPX2Mesh。UE。2G3GLTERNC。LTEAS:AccessStratumNASNonAccessStratum。MAC、RLC、RRCNASSMSessionManagementMMMobilityManagement。LTE〔GPRSServingGPRSSupportNodeGPRSGGSN〕。2G3GLTE、、、GUTIGloballyUniqueTemporaryIdentifierLTELTE(ISR)。UEUEMMENASEPSEMMEPSMobilityManagement。NASEMMGUTI、、、EMM。EMMEMMUE。2LTE2.1GUTIGUTIIMSI。UEMMEGUTI。GUTIUMTSTMSIIMSI。GUTIGUTITAITrackingareaIdentity。TAUTrackingareaUpdateGUTI。GUTITAIlistUE。EMMMME。GUTITAU。GUTIPLMNPLMN。GUTI、UEGUTI、GUTI。2.2LTEUMTSLTEeNodeBeNodeB。eNodeBX2eNodeBMME/SGWS1。UMTSLTE2420091010ODERNSCIENCE&TECHNOLOGYOFTELECOMMUNICATIONSM····························2MMESGSNMMENAS。MME。IMSI、GUTI。LTELTE(AKA:AuthenticationandKeyAgreement)。LTEAKA。UE。LTEUELTE。LTE、GUTI、、。UEKASMEKeyASMELTE。USIMUEUE。UENASUE。UEIMSIGUTIIMSI。NASIMSIUEUEEPS3,。2.3UE,IMSI、IMEI。UET3470。。UEEMMUE。2T3470。UEUSIMUE“”。TAUUETAU。3LTE3.1UE。MMEMMEAKAUE。MMEUEUEPDNGatewayMMEUEIP。UEIP。。UEIPv4IPv6。UEPLMNPLMNTAI(TAC:TrackingAreaCode)。PLMN(E-UTRAN)。UE“PLMN”PLMN“PLMN”。UE“TA”、“TA”“TA25MSTTOctober2009eatruesF····························”TAI。EMMEMM-DeregisteredUEMMEEMMEMM-Registered-initiated。GUTIUETAIGUTI。GUTIUEIMSI。PDN。NASUE。UENAS。EMMUEMME。LTE“”IP“”。LTEAttachEPS。EPS。EPSEPS。EPSLTEEPSEPSEPSESMEPSSessionManagementEMM。EPS。3.2。。。。3.3。1TAListLTEUE。SGSN/MSC。LTETAListLTETAU。TAListLTEMMETAIUETAList。2G3G2G3GRAI。TAListTAIUETATAITAIListUETAUTAU。LTEUETAListTA。2TAURAUE-UTRANGSM/EDGE(GERAN)/UTRANEPCEvolvedPacketCoreNetworkEPCLTETAUTrackingareaUpdateLTE2G3GRAU:RoutingareaUpdate。TAUTAU、MMETAU。UELTETAListUETAITAListTAU。LTETAUSGWSGWTAUMMETAUSGW/PGW2620091010ODERNSCIENCE&TECHNOLOGYOFTELECOMMUNICATIONSM····························MSTTHSSHomeSubscriberServerMME。UEMMEGERAN/UTRANRAU。SGSNUESGW/PGWMMEHSS。TAURAUE-UTRANGERAN/UTRAN。4NAS4.1NASLTENASNASUEMME。LTE/SAEeNodeBLTE/SAEASNASASUEeNodeB。NASUEMMENAS。LTEMMEUENASMME。MMENASNAS。MMEUENASLTE。NASAS。UELTE。“”UEMME。UELTE。S1NASNAS。4.2NASUELTE。NASNAS。NASNAS。NASKNASint、KNASenc、KeNB。KNASintUEMMEKASMEUEMMENAS。KNASencUEMMEKASMEUEMMENAS。KeNBUEMMEKASMEKeNB。5。LTEIP。、、。27