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1、InternationalJournalofNext-GenerationNetworks(IJNGN)Vol.6,No.1,March2014SurveyOnSchedulingAndRadioResourcesAllocationInLte#1*2#3FayssalBendaoud,MarwenAbdennebi,FedouaDidi#LaboratoryofTelecommunicationTlemcen(LTT)*LaboratoryofProcessingandTransmissionofInforma
2、tion(L2TI)ABSTRACTThispaperfocusesonanessentialtaskoftheenhancedNodeBeNodeBelementinLTEarchitecture,theRadioResourceManagerRRM,whichaimstoacceptorrejectrequestsforconnectiontothenetworkbasedonsomeconstraintsandensuringoptimaldistributionofradioresourcesbetwee
3、nUsersEquipmentsUEs.ItsmainfunctionalitiesincludeAdmissionControlACandPacketSchedulingPS.ThispaperwillcentermainlyonthePSpartoftheRRMtask,whichperformstheradioresourceallocationinbothuplinkanddownlinkdirections.Severalapproachesandalgorithmshavebeenproposedin
4、theliteraturetoaddressthisneed(allocateresourcesefficiently),thediversityandmultitudeofalgorithmsisrelatedtothefactorsconsideredfortheoptimalmanagementofradioresource,specifically,thetraffictypeandtheQoS(QualityofService)requestedbytheUE.Inthisarticle,anart’s
5、stateoftheradioresourceallocationstrategiesandadetailedstudyofseveralschedulingalgorithmsproposedforLTE(uplinkanddownlink)aremade.Therefore,weofferourevaluationandcriticism.KEYWORDSEnhancedNodeBeNodeB,LTE,RadioResourcemanagerRRM,AdmissionControlAC,PacketSched
6、ulerPS.1.INTRODUCTIONLongTermEvolution(LTE)or3.9Gsystemsisanimportanttechnologyoriginallydesignedtoachieveasignificantdatarates(50Mbit/sintheuplinkand100Mbit/sinthedownlinkinasystembandwidth20MHz),whileallowingtheminimizingofthelatencyandprovidingaflexibledep
7、loymentofthebandwidth.LTEoffersseveralmainbenefitsforthesubscribersaswellastotheserviceproviders.Itsignificantlysatisfiestheuser’srequirementbytargetingthebroadbandmobileapplicationswithenhancedmobility.Itisdesignatedasthesuccessornetworks3G.Itallowsanefficie
8、ntexecutionofinternetservicesemerginginrecentyears.Itusesthepacketswitchingprocessaswellas3Gnetworks,thedifferenceistheusingofTimeDivisionmultiplexing(TD)andFrequencyDivisionmultiplexing(
