TD-SCDMA系統(tǒng)中RRU代理系統(tǒng)的研究與實(shí)現(xiàn)的中期報告

TD-SCDMA系統(tǒng)中RRU代理系統(tǒng)的研究與實(shí)現(xiàn)的中期報告Abstract:ThisreportpresentsthecurrentstatusofresearchandimplementationoftheRRUproxysystemintheTD-SCDMAcellularnetwork.TheRRUproxysystemisdesignedtoenableefficientandflexibleresourceallocationinthenetwork.ThereportprovidesabriefoverviewoftheTD-SCDMAsystemanditsarchitecture,followedbyadetaileddescriptionoftheRRUproxysystem.Thereportalsodiscussesthechallengesfacedduringtheimplementationofthesystemandproposespossiblesolutions.Finally,thereportpresentsthecurrentstatusoftheimplementationandthefutureworkthatneedstobedone.Keywords:TD-SCDMA,RRUproxysystem,resourceallocation,cellularnetwork1.IntroductionTheTD-SCDMAcellularnetworkisa3GcellularsystemthathasbeendevelopedinChina.Thenetworkisdesignedtoprovidehigh-speeddataservicestomobiledevices.Thenetworkarchitectureconsistsofthreemaincomponents:theRadioAccessNetwork(RAN),theCoreNetwork(CN),andtheUserEquipment(UE).TheRANisresponsibleforprovidingwirelessaccesstothenetwork.Itconsistsoftwosubcomponents:theBaseStationSubsystem(BSS)andtheRadioNetworkController(RNC).TheBSSisresponsibleformanagingtheradioaccessinterface,whereastheRNCisresponsibleformanagingtheBSSsandtheresourcesallocatedtothem.TheRRU(RemoteRadioUnit)isanimportantcomponentoftheRANthatisresponsibleforconvertingthedigitalsignalsintoanalogsignalsandviceversa.TheRRUislocatedclosetotheUE,andhence,itisresponsibleforaverysmallarea.However,theRRUisconnectedtotheRNCviaahigh-speeddatalink,whichenablesittobecontrolledbytheRNC.TheRRUproxysystemhasbeenproposedtoimprovetheresourceallocationefficiencyintheTD-SCDMAnetwork.TheRRUproxysystemisdesignedtoenabletheRNCtoallocatetheresourcestotheRRUinamoreflexibleandefficientmanner.TheRRUproxysystemconsistsoftwomaincomponents:theProxyGateway(PG)andtheResourceAllocationController(RAC).ThePGisresponsibleforprocessingthedatapacketsreceivedfromtheUE,whereastheRACisresponsibleforallocatingtheresourcestotheRRU.2.RRUProxySystemTheRRUproxysystemisdesignedtoenabletheRNCtoallocatetheresourcestotheRRUinamoreflexibleandefficientmanner.TheRRUproxysystemconsistsoftwomaincomponents:theProxyGatewayandtheResourceAllocationController.2.1ProxyGatewayThePGisresponsibleforprocessingthedatapacketsreceivedfromtheUE.ThePGislocatedclosetotheUEandisresponsibleforasmallarea.ThemainfunctionsofthePGare:-Packetforwarding:ThePGisresponsibleforforwardingthedatapacketsreceivedfromtheUEtotheRACforresourceallocation.-Packetbuffering:ThePGisresponsibleforbufferingthedatapacketsincasetheresourcesarenotavailable.-QoSmanagement:ThePGisresponsibleformanagingtheQoSofthedatapackets.ItensuresthatthedatapacketsaredeliveredtotheUEwiththerequireddelayandjitter.-Scheduling:ThePGschedulesthedatapacketsfortransmissionbasedontheavailabilityoftheresourcesandtheQoSrequirements.2.2ResourceAllocationControllerTheRACisresponsibleforallocatingtheresourcestotheRRU.ThemainfunctionsoftheRACare:-Resourceallocation:TheRACallocatestherequiredresourcestotheRRUbasedontherequirementsofthePGandtheavailabilityoftheresources.-Resourcemanagement:TheRACmanagestheresourcesallocatedtotheRRU.Itmonitorstheutilizationoftheresourcesandreallocatesthemifrequired.-QoSmanagement:TheRACensuresthattheQoSrequirementsofthedatapacketsaremet.Itallocatestheresourcesinsuchawaythatthedelayandjitterrequirementsaremet.3.ChallengesTheimplementationoftheRRUproxysystemfacesseveralchallenges,someofwhichare:-Compatibility:TheRRUproxysystemhastobecompatiblewiththeexistingTD-SCDMAnetwork.-Scalability:TheRRUproxysystemhastobescalabletosupportalargenumberofUEs.-Reliability:TheRRUproxysystemhastobereliabletoensurethatthedatapacketsaredeliveredtotheUEswithminimumdelayandloss.-Security:TheRRUproxysystemhastobesecuretopreventunauthorizedaccessandattacks.-Performance:TheRRUproxysystemhastoperformefficientlytomeettherequirementsofthenetwork.4.ConclusionTheRRUproxysystemhasbeenproposedtoimprovetheresourceallocationefficiencyintheTD-SCDMAnetwork.TheRRUproxysystemconsistsoftwomaincomponents:theProxyGatewayandtheResourceAllocationController.The