LTE系统全网信令流程.docx

■LTE系统全网信令流程

Introduction

Asanewwirelessmobilecommunicationtechnology,LTE(LongTermEvolution)provideallkindsofservicesthroughnetworkaccessprocedures.SowhenyouaretryingtounderstandtheLTEtechnology,thenetworkaccessprocedureisjustintheclosefrontofyoureyes.

ThisdocumentistryingtodescribethegeneralprocedurehandlingsamongthenetworkelementsunderLTEnetworkarchitecture,bywayofshowingyoutheprocedurehandlingsinfigures.Fromthesefigures,youwillgetanoverviewoftheLTEgeneralprocedures,suchas:“TheSystemInformationHandlingυ,uTheRandomAccessProcedure,,5ttTheAttachProcedure5,ttTheTAUProcedure5,uTheHandoverProcedure55,etc.

Thefirstseveralfiguresshowtheintroductionofprotocollayerstacksamongnetworkelements,suchas:protocollayerstacksubetweenUE-MMEυ,ubetweenUE-PDNGW,,5etc.Fromtheseprotocollayerstacksintroduction,youwilllearnthepeer-to-peerprotocollayersamongseveralrelatednetworkelements,itwillhelpyoutounderstandLTEproceduresworkingmechanismstuff.Andafter,beginsthedescriptionoftheLTEgeneralprocedure,inanorderfromuSysteminformationhandling,,to“ANRMeasurementprocedure55,withthettaccessProCedUre”，“handoverprocedure55,tInter-RAToperationprocedure, 5inthemiddle.Fromtheseprocedurefiguresdescription,youcangetthedeepdetailsoftheLTEnetworkaccessprocedure,anditwillfinallydirectyoutofoundawholesystem-viewofLTEarchitecture.

ThisdocumentissuitablefortheguyswhowanttoknowtheLTEgeneralprocedure,oruseitasareferencebook.

2009-11-06

LTEPDUL3RDTeam

Abbreviations

MME

MobiHtyManageInentEntity

UE

USerEqUiPment

MS

MobileStation

eNodeB

evolvedNodeB

GW

GateWay

PCRF

PoliCyandChargingRUleSFUCtiOn

H-PCRF

Home-PCRF

V-PCRF

Visited-PCRF

HSS

HomeSubscriberServer

EIR

EqUiPmentldentityRegiSter

UTRAN

UniversalTerrestrialRadioAccessNetwork

E-UTRAN

evolvedUTRAN

GERAN

GSM/EDG