《LTE典型信令过程》PPT课件

《《LTE典型信令过程》PPT课件》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

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