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ID:36769570
大小:1.00 MB
页数:52页
时间:2019-05-10
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1、LTE典型信令过程SoftwareArchitecture3类NAS信令流程1.会话管理相关2.位置管理相关3.鉴权管理相关UEeNBMMESGWPGWRRC:RRCConnectionsetupcompleteNAS:AttachRequestNAS:PDNconnectivityrequestS1AP:InitialUEmessageAuthenticationandNASsecurityprocedureHSSS6a:UpdateLocationrequestS6a:UpdateLocationanswerS11:Createbeare
2、rrequestS5:CreatebearerrequestS5:CreatebearerresponseS11:CreatebearerresponseS1AP:InitialContextsetuprequestNAS:AttachacceptNAS:ActivateDefaultEPSbearerrequestNAS:AttachRequestNAS:PDNconnectivityrequestRRC:RRCConnectionReconfigurationNAS:AttachacceptNAS:ActivateDefaultEPSbe
3、arerrequestRRC:RRCConReconfigCompleteS1AP:InitialContextsetupresponseRRC:ULinformationTransferNAS:AttachcompleteNAS:ActivateDefaultEPSbeareracceptS1AP:UplinkNASTransportNAS:AttachcompleteNAS:ActivateDefaultEPSbeareracceptUEinitiatedDetachProcedureUEeNBMMESGWPGWHSSRRC:RRCCon
4、nectionsetupcompleteNAS:DetachrequestS1AP:InitialUEmessageNAS:DetachrequestAuthenticationandNASsecurityS11:DeletesessionrequestS5:DeletesessionrequestS5:DeletesessionresponseS11:DeletesessionresponseS1AP:DownlinkNAStransportNAS:DetachacceptRRC:DLInformationtransferNAS:Detac
5、hacceptRadioandS1ReleaseS6a:TDelaypurgetimerexpiresS6a:PurgeUErequestS6a:PurgeUEanswerUETriggeredServiceRequestProcedureInitialUEMessageNetworkTriggeredServiceRequestTAUprocedureInterMME-TAU-messageflowHandoverHandoverAirInterfaceTYPESOFHANDOVERX2BasedHandover:withoutSGWcha
6、ngeandwithSGWchangeS1BasedHandover:witheNB,MMEandSGWchangeX2HandoverX2istheinterfacebetweentwoeNB’sandX2-APistheprotocolsusedforcommunicationoverit.ThehandoverisdirectlyperformedbetweentwoeNodeB’s.HandovertakesplacewhentheeNBdetectsthatUEcannolongerbeservedbyitbecauseofthep
7、owerconstraints.TheMMEisonlyinformedattheendofthehandoverprocedureoncethehandoverissuccessfulThereleaseofresourcesatthesourcesideisdirectlytriggeredfromthetargeteNB.RRC:ConnectionReconfigurationRequestRRC:ConnectionReconfigurationCompleteUES-eNBT-eNBMMESGWRRC:MeasurementCon
8、trolX2AP:HandoverRequestS11:ModifybearerrequestS11:ModifybearerresponseX2AP:SNStat
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