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1、InternationalJournalofComputerandElectricalEngineering,Vol.2,No.5,October,20101793-81633GPPLTE/SAE:AnOverviewS.M.Chadchan,Member,IEEEandC.B.AkkiLTESAEAbstract—3GPPLTE/SAEisanextgenerationradioaccesssystemthatsupportsfutureend-userrequirements.Thefundamentalaimoflong-termevolu
2、tion(LTE)istoimprovetheserviceprovisioningandreduceuserandoperatorscost,whichEPSwillbefulfilledbyimprovingdatarates,coverage,systemcapacityandreducinglatency.ThepaperpresentsthetechnicalE-UTRAoverviewofLongTermEvolution(LTE)/SystemArchitectureEvolution(SAE),theQoSprovisioning
3、aspectsofEvolvedPacketSystem(EPS),thekeyresearchchallengesandtheUEE-UTRANEPCongoingworktoprovidesolutions.Thediscussionalsoprovidesaninsightinto3GPPLTE-Advanced,whichisthefutureofLTEontheroadwayto4G.Thepaperprovidesthevaluableandconciseinformationtotheresearchersintheareaof3G
4、PPFigure1.EvolvedPacketSystem.LTEand4G.TheEPCisaflatnetworkarchitecture,IPbasedIndexTerms—EPS,E-UTRAN,LTE-Advanced,OFDMA.multi-accesscorenetworkthatsupportstheoperationofacommonpacketcorenetworkfor3GPPradioaccesses,non-3GPPradioaccessesandfixedaccesses.TheEPCI.INTRODUCTIONpro
5、videsaccesstoexternalIPnetworksandperformsvarious3GPPLTE/SAEisanext-generationradioaccesssystemfunctionslikeQoS,security,mobilityandterminalcontextdesignedtosupportthefutureend-usersrequirements[1],[4].managementforidleandactiveterminals.TheLTE-RANThemotivationfortechnologica
6、levolutioninmobileperformsallterminalrelatedradiointerfacefunctions.ThecommunicationcomesfromtheglobalizationofmarketsandLTEusesOrthogonalFrequencyDivisionMultiplexingincreasedvendorcompetence,popularizationofIEEE802(OFDM)asitsradioaccesstechnology,togetherwithwirelesstechnol
7、ogiesinmobilecommunicationdomain,andadvancedantennatechnologies.Itsupportsdifferentcarrierthedemandforadvancedmobileservices.Theincreasedusebandwidths(1.4-20MHz)inbothFrequencyDivisionofmobileservicessuchashigh-speedinternetaccess,Duplex(FDD)andTimeDivisionDuplex(TDD)modes.Th
8、eMultimediaOnlineGaming(MMOG),MobileTV,Web2.0,EPSemploysnetwork-init
