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1、LTE系统全网信令流程IntroductionAsanewwirelessmobilecommunicationtechnology,LTE(LongTermEvolution)provideallkindsofservicesthroughnetworkaccessprocedures.SowhenyouaretryingtounderstandtheLTEtechnology,thenetworkaccessprocedureisjustintheclosefrontofyoureyes.Thisdocumentistryingtode
2、scribethegeneralprocedurehandlingsamongthenetworkelementsunderLTEnetworkarchitecture,bywayofshowingyoutheprocedurehandlingsinfigures.Fromthesefigures,youwillgetanoverviewoftheLTEgeneralprocedures,suchas:“TheSystemInformationHandling”,“TheRandomAccessProcedure”,“TheAttachPr
3、ocedure”,“TheTAUProcedure”,“TheHandoverProcedure”,etc.Thefirstseveralfiguresshowtheintroductionofprotocollayerstacksamongnetworkelements,suchas:protocollayerstacks“betweenUE-MME”,“betweenUE-PDNGW”,etc.Fromtheseprotocollayerstacksintroduction,youwilllearnthepeer-to-peerprot
4、ocollayersamongseveralrelatednetworkelements,itwillhelpyoutounderstandLTEprocedures’workingmechanismstuff.Andafter,beginsthedescriptionoftheLTEgeneralprocedure,inanorderfrom“Systeminformationhandling”to“ANRMeasurementprocedure”,withthe“accessprocedure”,“handoverprocedure”,
5、“inter-RAToperationprocedure”,……,inthemiddle.Fromtheseprocedurefiguresdescription,youcangetthedeepdetailsoftheLTEnetworkaccessprocedure,anditwillfinallydirectyoutofoundawhole-system-viewofLTEarchitecture.ThisdocumentissuitablefortheguyswhowanttoknowtheLTEgeneralprocedure,o
6、ruseitasareferencebook.2009-11-068/29/2021AbbreviationsMMEMobilityManagementEntityUEUserEquipmentMSMobileStationeNodeBevolvedNodeBGWGateWayPCRFPolicyandChargingRulesFuctionH-PCRFHome-PCRFV-PCRFVisited-PCRFHSSHomeSubscriberServerEIREquipmentIdentityRegisterUTRANUniversalTer
7、restrialRadioAccessNetworkE-UTRANevolvedUTRANGERANGSM/EDGERadioAccessNetworkPLMNPublicLandMobileNetworkHPLMNHomePLMNVPLMNVisitedPLMNHLRHomeLocationRegisterVLRVisitorLocationRegisterCBCCellBroadcastCentreOMCOperationandMaintenanceCenterBSCBaseStationControlerBTSBaseTranscei
8、verStationBSSBaseStationSubsystemCNCoreNetworkMSC/SGSNMobile-servicesSwitchingCentre/Serv
