LTE介绍（诺基亚西门子内部培训资料）

LTEOverview,SunChangsongLBTSI&VHZ2009-05-05,Outline,LTEmotivationandbackground3GPPscheduleLTEKeyTechnologyLTEarchitectureLTEphysicalLayerLTElayer2/3LTEPeakBitRatesSpectralEfficiencyVoiceevolutioninLTE/SAENokiaSiemensNetworksLTE,LTEmotivationandbackground,Wirelineevolutionpusheshigherdatarates,Wirelessdatausagerequiresmorecapacity,Flatratepricingpushesefficiency,LTEexpectations,Othertechnologiespushwirelesscapabilities,DriversforLTE,HSDPAdatapackagesintroducedtrafficexplodes,HSDPAdatavolume,ADSL,VDSL,GPON,40Mbps,80Mbps,10MHz,20MHz,ElisaFlatrate10-30/month,Severalcustomerswith3TB/dayHSDPAtraffic,3GPPschedule,LTEin3GPPRelease8,3GPPandOperatorRequirementsPacketSwitchedDomainOptimizedServer-UERTTUL),PhysicalLayerdefinitionsTS36.211FrameStructure(DL)Slot/Frame,NsymbDLOFDMsymbols(=7OFDMsymbolsNormalCP),CyclicPrefix,160,2048,(xTs),1slot=15360,1,0,2,3,4,5,6,1,0,2,3,4,5,6,0,1,2,3,4,5,6,1frame,1sub-frame,1slot,#0,#1,#8,#2,#3,#4,#5,#6,#7,#9,#10,#11,#12,#19,#13,#14,#15,#16,#17,#18,Ts=1/(15000 x2048)=32.552nsec,Ts=1/(15000 x2048)=32.552nsecTs:Timeclockunitfordefinitions,FrameStructuretype2(TDD),DwPTS,T(variable),Oneradioframe,Tf=307200 xTs=10ms,Onehalf-frame,153600 xTs=5ms,#0,#2,#3,#4,#5,Onesubframe,30720 xTs=1ms,Guardperiod,T(variable),UpPTS,(variable),Oneslot,Tslot=15360 xTs=0.5ms,#7,#8,#9,For5msswitch-pointperiodicity,For10msswitch-pointperiodicity,LTELayer2/3,UserPlaneLTEprotocolstacks,PDCP,UE,RLC,MAC,PhysicalLayer,PDCP,eNodeB,RLC,MAC,PhysicalLayer,LTELayer2,Layer2protocols(=MAC&RLC)terminateinBTS(eNodeB)AlsoPDCP(PacketDataConvergenceProtocol)terminatesineNodeBPDCPincludesIPheadercompressionandciphering,FunctionalityofL2Layer(MAC,RLC,PDCP),MACDataTransferviaLogicalChannels.MultiplexingLogicalChannelsandmappingtoTransportChannels.SchedulingandRadioResourceAllocationbetweenUEsandbetweenLogicalChannels.TransportFormatSelection.HybridARQProtocol.,FunctionalityofL2Layer(MAC,RLC,PDCP),RLCTM,UM,AMDataTransfer.AutomaticRepeatRequest(ARQ)Protocol.Concatenation,Segmentation,Re-segmentation.In-SequenceDelivery.DuplicateDetection.,FunctionalityofL2Layer(MAC,RLC,PDCP),PDCPDataTransferforUserandControlPlane.HeaderCompression.Ciphering.IntegrityProtection.SequenceNumbering.In-SequenceDeliveryduringHO.DuplicateDetection.,LTELayer3(RRC),ControlPlaneLTEprotocolstacks,RRC,UE,RLC,MAC,PhysicalLayer,RRC,eNodeB,RLC,MAC,PhysicalLayer,RadioResourceControl(RRC)signalingisalsoterminatedineNodeB(comparedtoRNCinWCDMA)Oneoftheenablersfortheflatmodelisthelackofmacro-diversityRRChandlesBroadcast,Paging,RRCconnectionmanagement,MobilitymanagementsandUEmeasurements,LTEPeakBitRates,DownlinkPeakBitRate,2x2MIMO64QAMPilotsymbols1outof14Referencesymboloverhead7.7%Result:172Mbpsin20MHzand86Mbpsin10MHz,UplinkPeakBitRate,Singlestreamtransmission16QAMPilotsymbols1outof1457Mbpsin20MHzand28Mbpsin10MHz,SpectralEfficiency,FrequencyReuseOneinLTE,LTEisdesignedforfrequencyreuseofonenofrequencyplanningrequiredInter-siteinterferencecoordinationispossiblebyexchangingloadinformationoverX2interface=softfrequencyreuseCurrentsimulationsshownoclearperformancegainsindownlinkfrominter-siteinterferencecoordinationSomeperformancepotentialinuplinkbyexchangingoverloadindicatorinformation,X2,X2,KeyFeaturesforLTEDownlinkSpectralEfficiencyComparedtoHSPAR6,Inter-cellinterferencerejectioncombiningorcancellation,MIMO=combineduseof2txand2rxantennas,Frequencydomainpacketscheduling,+10%,+20%,+40%,Totalgain,upto3.1x,OFDMwithfrequencydomainequalization,+20.70%,ComparedtosingleantennaBTStxand2-rxterminal,NotfeasibleinHSPAduetocdmamodulation,PossiblealsoinHSPAbutbetterperformanceinOFDMsolution,Duetoorthogonality,3GPPR7bringsequalizerandMIMOalsotoHSPA,VoiceevolutioninLTE/SAE,PotentialvoiceevolutionstepsinLTE,LTEusedforhighspeedpacketdataaccessonlyOperatorvoiceserviceprovidedoverCSnetworkFallbacktoCSvoiceLTEnetworkisusedfordataonlyTerminalissimultaneouslyregisteredtobothLTEand2G/3GCSnetworkVoicecallsareinitiatedandreceivedoverCSnetworkSingleradioVoiceCallContinuity(VCC)OperatorprovidesVoIPoverLTEIMSactsascontrolmachineryVoicecallscanbehandedovertoCSnetworkAll-IPnetworkOperatorprovidesVoIPoverLTEIMSactsascontrolmachineryVoicecallscanbehandedovertootherpacketswitchednetworks,LTEvoiceevolution,Optionally:ComplementaryVoIPviaIMS/NVSandPC-client,Optionally:ComplementaryVoIPviaIMS/NVS,NokiaSiemensNetworksLTE,Threesectorsitesolution1+1+1MultimodeSystemModule3-sectorRFModule3x60WMultimodeHWavailablesinceQ3/2008andSW-upgradeabletoLTE!,MultimodeSystemModule,3-sectorRFModule,CompleteOutdoorBTS(DCpowered)Size:6UhighVolume:50litersWeight:50kg,FlexiMultiradioBTSSite,SizeComparison,FlexiMultimodeSystemModuleFeatures,characteristicsandcapabilities,FlexiMultimodeSystemModuleOutdoorcapable,lowvolume,lowweightMaturemultimodeHWforfielddeploymentIntegratedBaseband,BTSControlandTransportOpticalinterfaces(OBSAI)toRFModulesImportantpartofNokiaSiemensNetworksgloballylaunched“GreenInitiative”forenvironmentalsustainability(EnergyEfficiencysolution),Outdoorcapable-35+55C,IP55Volume:25litersWeight:21kg,FlexiTransportModules,FlexiMultimodeSystemModulewithFlexiTransport(Sub)Module,Multipletransportoptions,2xGEelectrical+1xGEoptical/electricalviaSFPmoduleGEoptical/electricalviaSFPmodule,FTHA,FTLB,3xGE1)+4xE1/T1/JT1symm.(coaxialviapatchpanel)High-capacity(2Gbit/sIPSec)ToP,SyncEthernet,16xE1/T1/JT1symmetrical(coaxialviapatchpanel),FTIB,FTJA,2xFE,1xGE2)4xE1coaxial,2xGE1)+4xE1/T1/JT1symm.(coaxialviapatchpanel)ToP(IEEE1588v2),SyncEthernet,3-SectorRFModule-Multiradio,Flexi3-SectorRFModulewith3x70Wpoweramplifiersdelivers3x60WattheantennaconnectorImprovedOPEX,electricityconsumptionis25%lowerthanpreviousgenerationRF3sectorsLTE(1+1+1)withoneRFModule20MHzbandwidthOutdoorIP65,-35+55CSupportforupto20kmdistancefromSystemModule(distributedsiteconfiguration)All3GPPfrequencybandstobesupportedaccordingtomarketneeds,Sector2Tx&Rx,Sector3Tx&Rx,Sector3DivRx,Sector2DivRx,Sector1DivRx,Ant6,Ant5,Ant4,Ant3,Ant2,Ant1,Sector1Tx&Rx,Themostcost