TD-LTE

PrinciplesandKeyTechnologiesDTM.PX3.016.001-v6.0.0DatangMobileCommunicationEquipmentCo.,Ltd.CustomerServiceCenterTrainingCenterCourseObjectivesUnderstandthenetworkarchitectureofLTEUnderstandthethreekeytechnologiesofLTEMastertheframestructureofphysicallayerUnderstandthedirectionofTD-LTEnetworks"TD-LTEtechnologyprinciplesandsystemdesign",People'sPostsandTelecommunicationsPress"3GPPlongtermevolutiontechnologyprinciplesandsystemdesign",People'sPostsandTelecommunicationsPressLTE,TheUMTSLongTermEvolution-FromTheorytoPracticeBibliography2TD-LTE

PrinciplesandKeyTechnologiesTD-LTE

OverviewTD-LTEKeyTechnologiesFrameStructureandPhysical

ChannelMappingGPRS/EDGEPeakrate0.47/0.47Mbps3GPP

camp(GSM)WCDMAPeakrate：5.76/14.4MbpsHSPATD-SCDMAPeakrate：0.55/1.68MbpsTD-HSPAEV-DORel.0Peakrate：1.8/3.1MbpsD0Rel.ACDMA20001x3GPP2camp(CDMA)LTEFDDPeakrate50M/150MbpsLTETDDPeakrate10M/110MbpsLTE-AdvPeakrate500M~1GbpsMobileWiMAX802.16ePeakrate75MbpsMobileWiMAX802.16mPeakrate500M~1GbpsWiMAX

campTDMACDMAOFDM2G3G3.9G4GStandardevolutionroute41TD-LTEOverview1TD-LTEOverviewLTEisthenextgenerationofwirelesscommunicationstandardsspecifiedby3GPP.TD-LTEistheTDDmodeofLTE.LTEisbasedonOFDMAtechnology,inordertoreducetheuserplanedelay,canceledtheradionetworkcontroller(RNC),usingaflatnetworkarchitecture.

Notsomuchthe3Gtechnology"evolution”,asitis"revolution”.WhatisLTE?LongTermEvolution51

TD-LTEFrameStructureAwirelessframewithalengthof10msconsistsof10subframesoflength1ms;；Eachsubframeconsistsoftwoslotswithalengthof0.5ms；1radioframe，Tf=307200*Ts=10ms1timeslot，Tslot=15360*Ts=0.5ms1

subframe#1#0#3#2#19#18……6FDD

framestructureOne10msradioframeiscomposedoftwo5msfieldsEachfieldconsistsoffive1mssubframesConventionalsubframe:consistsof20.5mstimeslotsSpecialsubframe:consistsofDwPTS,GPandUpPTSSupports5msand10msuplinktransitionpointcycles1TD-LTEFrameStructure71wirelessframe，Tf=307200*Ts=10mssubframe#0subframe#3subframe#2subframe#5#1#01

field，153600*Ts=5mssubframe#4subframe#9subframe#8subframe#71timeslot，Tslot=15360*Ts=0.5ms30720*Ts=1ms1個(gè)subframe，30720TsDwPTSGPUpPTSDwPTSGPUpPTSTDDframestructure1TD-LTEOverviewSystemcapacityRadioaccessnetworkframeworkandevolutionSystemdeploymentSystemperformanceComplexityRadioresourcemanagementLTE

requirementsCostandbusinessneeds8LTE

Requirements1TD-LTEOverviewSystemDesignKeyRequirements9Peakrate20MHzSystembandwidth：Downlinkinstantaneouspeakrate100Mbps（Spectrumefficiency5bps/Hz）；Uplinkinstantaneouspeakrate50Mbps（Spectrumefficiency2.5bps/Hz）DelayThedelayofthecontrolplanefromtheresidentstatetotheactivestateislessthan100ms;Thedelayofthecontrolplanefromthesleepstatetotheactivestateislessthan50ms;TheuserplanezeroloadhasasmallIPpacketdelayoflessthan5ms.CoverageThroughput,spectrumefficiencyandmobilityindicators：Intheradiusof5kmbelowthedistrictshouldbefullymet;Intheradiusof30kminthedistrictperformancemayhaveaslightdecline;Donotexcludecellswitharadiusof100km.Spectrumflexibility

Supportdifferentsizebandsize,from1.4~20MHz;Supportthedeploymentofpairedandunpairedspectrum;Supportmulti-bandcarrieraggregation.Sector3Sector4Sector6Sector7Sector2Sector5Sector11TD-LTEOverviewFrequencydivisionmultipleaccesssystemICICMIMOtechnologyFlatnetwork10MME/SAEGatewayMME/SAEGatewayeNBeNBeNBS1S1X2X2E-UTRANTD-LTECoreTechnology1TD-LTEOverviewFlatnetworkarchitecturetoreduceequipmentinvestmentReducethenumberofinterfaces,IPnetworkinterfaceEnhancedend-to-endQoSCanceltheRNC(centralcontrolnode),leavingonlyonelayerofRANnodes——eNodeBENodeBandcorenetworkusingIP-basedflexiblemulti-connection——S1-flexinterfaceTheadjacenteNodeBusesameshconnection——X2interface11MME/SAEGatewayMME/SAEGatewayeNBeNBeNBX2S1S1S1S1X2X2E-UTRANE-UTRANFlatNetworkArchitecture1TD-LTEOverviewE-UTRANandEPCfunctionaldivision121TD-LTEOverview13CurrentspectrumallocationWRC07distributionRadioandTVTakeupWRC07distribution

TelecomCDMA

uplink

TelecomCDMA

uplink

MobileE-GSM

uplinkMobileGSMuplinkUnicomGSMuplink450470698790806825835870880885890909915

MobileDCS

uplink

Unicom

DCS

uplink

FDD

uplinkMobileDCSdownlinkUnicomDCSdownlink9309359549601710173517551785180518301850MHz

MobileE-GSM

downward

Mobile

GSM

downwardUnicomGSMdownlink

UnicomWCDMA

uplink

FDD

uplinkSatellite

UnicomWCDMAdownlink185018801900192019351940198020102025211021302200FDDdownlink

TelecomEVDO

uplink

Mobile

TD

up-downlink

TelecomEVDOdownlink

FDDdownlinkSatelliteTD-LTEEbandWLANFixedbroadbandandothersWLAN230024002483.5250026903400360057255850MHzTD-LTEDband1955212521452170TD-LTEFbandThinkingquestions1.WhydevelopLTE？2.Whataretherequirements/needsforLTE?Tomeettheseneeds,whatarethecoretechnologiesthatrequireLTEtobeintroduced？

3.WhatistheLTEnetworkarchitecture?13TD-LTE

PrinciplesandKeyTechnologiesTD-LTEOverviewTD-LTEKeyTechnologiesFrameStructureandPhysical

ChannelMapping2.1OrthogonalFrequencyDivisionMultipleAccess2.2Multi-antennaTechnology2.3InterferenceSuppressionTechnologyTD-LTEOverviewTD-LTEKeyTechnologiesFrameStructureandPhysicalChannelMapping2.1OrthogonalFrequencyDivisionMultipleAccessTD-LTEfrequencydivisionmultipleaccesstechnologydownlinkOFDMA：Usersinacertainperiodoftimeexclusiveofa"clean"bandwidthuplinkSC-FDMA：AnimprovedOFDMsystemwithsinglecarriercharacteristics(lowpeak-to-averageratio)uplink：SC-FDMAdownlink：OFDMAFDMATDMACDMAOFDMA17TheessenceofOFDMisafrequencydivisionsystem,andfrequencydivisionisthemostsimplewaytoachievewirelesscommunication.ThesubcarriersoftheOFDMmodulationcanbeoverlappedwitheachotherascomparedwiththeconventionalmulti-carriermodulation(MCM),andtheorthogonalitybetweenthesubcarrierscanbemaintained.TraditionalFDMspectrumOFDM

spectrumOrthogonalFrequencyDivisionMultiplexing18WhatisOFDM？2.1OrthogonalFrequencyDivisionMultipleAccessThechannelsaredividedintoorthogonalsubchannels,theserialhighspeeddatasignalsareconvertedintoparallellowspeedsub-datastreams,modulatedtobetransmittedoneachsubchannel,andthequadraturesignalscanbeseparatedbytherelevanttechniquesatthereceivingend.Sincethebandwidthofeachsubchannelisverysmall,thefadingoneachsubchannelcanberegardedasaflatfading,whichcaneffectivelyeliminateintersymbolinterference;andsincethebandwidthofeachsubchannelisonlyafractionoftheoriginalchannelbandwidth,thechannelEquilibriumalsobecomesrelativelyeasy.19OFDMAbasicprinciples2.1OrthogonalFrequencyDivisionMultipleAccessOFDMimplementation(transmit)toRFtxSize-N

IFFTCP

insertionMsymbolsTuTCPTu=1/f00fMsubcarriersS/PFromcoding&modulationSize-N

FFTCP

removalMsymbols00fromRFrxP/STodemodulation&decodingOFDMimplementation(receive)202.1OrthogonalFrequencyDivisionMultipleAccessOFDMsubcarriertimedomainOFDMsubcarrierfrequencydomain212.1OrthogonalFrequencyDivisionMultipleAccessCPcanovercomethetimedelayinterference,eliminatingthemaximumofinter-symbolinterference(ISI).ThelongertheCP,thelongerthemultipathdelaythatcanresist,butthegreatertheoverhead.ConfigurationCPlength

NCP,fNormalCP?f=15kHz5.2μsforl=04.7μsforl=1,2,…,6ExtendedCP?f=15kHz16.7

μsforl=0,1,…,5?f=7.5kHz33.3μsforl=0,1,222OFDMCP（CyclicPrefix）2.1OrthogonalFrequencyDivisionMultipleAccessCPmakesthewaveformsgeneratedbymultipathswithinasymbolperiodacompletesinewave.Therefore,thetime-domainsignalscorrespondingtodifferentsubcarriersandtheirmultipathintegralarealways0toeliminateinter-carrierinterference(ICI)timeAmplitudetimeAmplitudeAmplitudetime23OFDMCP2.1OrthogonalFrequencyDivisionMultipleAccessAdvantagesofOFDMAResistancetomultipathfadinginthetimedomainInthefrequencydomainselectivefrequencyfading,simplifyingthereceiverchannelequalizationoperation242.1OrthogonalFrequencyDivisionMultipleAccessOFDMCDMAAnti-multipathinterferencecapabilityItcanuseordon’tuseasimpletimedomainequalizerTherequirementsforequalizerarehigherCombinedwithMIMOEachsubcarriercanberegardedasaflatfadingchannel,AntennaincreaseshavelimitedimpactonsystemcomplexityAreceiverthatcanmixMIMOreceptionandchannelequalizationisselectedtogreatlyincreasereceivercomplexityBandwidthscalabilityBetterbandwidthscalability,LTEsupportsavarietyofcarrierbandwidthWorsebandwidthscalabilityFrequencydomainschedulingFrequencydomainschedulingisflexibleFrequencydomainschedulingsmallparticlesize(180KHz)ExtensivefrequencydomainschedulingCarrierschedulingcanonlybeperformed25ComparisonofOFDMandCDMATechnology2.1OrthogonalFrequencyDivisionMultipleAccessTime-frequencysynchronizationrequirementsarehighHighPAPRInterferencewiththesamefrequency26OFDMtechnologyshortcomings2.1OrthogonalFrequencyDivisionMultipleAccessOFDMAresultsinhighPAPRiftheuseofOFDMAiftheuplinkwillaffectthecostoftheUEandthebatterylife27PAPR(Peak-to-AveragePowerRatio)2.1OrthogonalFrequencyDivisionMultipleAccessHighPAPRproblemdiagramSingleCarrierFrequencyDivisionMultiple

AccessSC-FDMAissimilartoOFDMA,butSC-FDMAcanreducePAPR.EffectivelyimprovetheefficiencyofRFpoweramplifier,reduceterminalcostsandpowerconsumption.28WhatisSC-FDMA？2.1OrthogonalFrequencyDivisionMultipleAccessDistributed:RBsassignedtouserare

notcontiguouslocalized:continuousRBtoone

user

Advantages:smallschedulingoverhead

Advantages:FrequencyelectionschedulinggainInthisschedulingcycle,User

Aisdistributed,User

Biscentralized.FrequencyUserAUserBUserCTime29Downlinkmultipleaccessmode—OFDMA2.1OrthogonalFrequencyDivisionMultipleAccessSimilartoOFDMA,thetransmissionbandwidthisdividedintoaseriesoforthogonalsubcarrierresources,anddifferentsubcarrierresourcesareallocatedtodifferentUserimplementations.Notethatthesubcarriersusedbyanyterminalmustbecontinuous.Inanyschedulingcycle,ausersub-carriermustbecontinuousFrequencyTimeUserAUserBUserC30Uplinkmultipleaccessmode—SC-FDMA2.1OrthogonalFrequencyDivisionMultipleAccessThinkingquestions1.WhatistheprincipleofOFDMA?2.ThefunctionofCP?3.WhataretheadvantagesanddisadvantagesofOFDMA?302.1ThinkingquestionsSupportsmultiplebandwidthsettings：1.4MHz3.0MHz5MHz10MHz15MHz20MHzSystembandwidth（MHz）1.435101520Numberofsubcarriers(pcs)72180

3006009001200322.1OrthogonalFrequencyDivisionMultipleAccess2.2Multi-antennaTechnology2.3InterferenceSuppressionTechnologyTD-LTEOverviewTD-LTEKeyTechnologiesFrameStructureandPhysicalChannelMapping2.2Multi-antennaTechnologyApluralityofdatastreamsaretransmittedonapluralityofantennas,respectively；Theuseofmultipathfading,withoutincreasingthebandwidthandantennatransmissionpowerofthecase,improvethechannelcapacityandspectrumutilization,orimprovethetransmissionqualityofdata.MultipleInputMultipleOutput34WhatisMIMO？2.2Multi-antennaTechnologyMIMOmultiplemodesbringavarietyofgains.DiversitygainBeamforminggainSpatialmultiplexinggainImprovespectrumefficiencyItrequiresthespectrumefficiencyofTD-LTEdownlinkbe5bps/Hz(Rel-10is30bps/Hz)Thespectralefficiencyofuplinkis2.5bps/Hz(Rel-10is15bps/Hz).35AdvantagesofMIMO2.2Multi-antennaTechnology36b0b1b2b3Transmitdiversityb0b1b2b3b0b1b2b3b0b1b2b3RecoverdataflowPath1Path2Dataflow2Dataflow1DataflowAntenna1Antenna2MIMOantennatransceiverdiversity:ImprovecommunicationqualitySU-MIMO MU-MIMO

MU-MIMO

ThebasestationwillsendmultipleDataflowsthatoccupythesametime-frequencyresourcetodifferentusers

downlinksupportsbothSU-MIMOandMU-MIMO2.2Multi-antennaTechnology37MIMOantennaSpatialmultiplexing:improvesystemcapacity

TraditionalbeamformingSmallspacingoftheantennaarray,usingmoreantennaunitsIncreasethepeakrate,cellcoverage,reduceinter-cellinterference

2.2Multi-antennaTechnology38MIMOantennabeamforming:Enhancedanti-jammingcapability2.2Multi-antennaTechnology39LTEinnovativetechnology:dual-flowbeamformingBeamforming（BF）MIMO

Reduceinterference

Raisethecoverageradius

IncreasethroughputDual-flowbeamformingtechnique

Increasethroughput

Raisethecoverageradius

Reduceinter-cellinterference

2.2Multi-antennaTechnology40ApplicationofMIMOinTD-LTE(PDSCHtransmissionscheme)TransmissionmodePDSCHtransmissionschemeAdvantageTypicalapplicationscenariosTM1Singleantennatransmissionmode

TheresultingCRSoverheadissmallVariousscenesTM2SenddiversityImprovethetransmissionqualityofthelink,andimprovethecoverageradiusofthecellAsafallbackmodeforotherMIMOmodesTM3Open-loopspacereuseImprovetheaveragespectralefficiencyandpeakrateofthecellHighSpeedMobilesceneTM4Closed-loopspacereuseImprovetheaveragespectralefficiencyandpeakrateofthecellLowspeedMobilesceneTM5Multi-userMIMOImprovetheaveragespectralefficiencyandpeakrateofthecellDensecityTM6Rank=1precodingImprovethecoverageofthecellOnlyrank=1issupportedfortransmissionTM7Single–flowbeamformingImprovelinktransmissionquality.ImprovethecoverageofthecellSuburban,widecoverageofthesceneTM8DoubleflowbeamformingImprovecellcoverage,enhancethecellcenteruserthroughputCellcenterthroughputneedsofthescene2.2Multi-antennaTechnology“Codeword”throughthe“transportblock”toachievetransmission,LTEiscurrentlythelargesttransmissionoftwocodewordsortwotransmissionblocks；Therankisthesameastherank,andtherankis1,2,3,4,whichrepresentsthenumberofindependentpropagationchannelsbetweentheterminalandthebasestationatanyonetime；Thepublicpilot'slogicalantennaporthas1,2,4threecases.Antennaport（1、2、4）codewordcodeword=TB

（1、2）<=layer=rank（1、2、3、4）<=layerTransmissionmodeisdifferent,usingdifferentprecodingmatrices.InsertCRS/DRSDemultiplexesacodewordtomultiplelayers41portPDSCHphysicallayerprocessing2.2Multi-antennaTechnologySimplesttransmissionscheme。PDSCHusesasingleantennaporttotransmit,accordingtoPort0ontheCRSdemodulation.Canbeusedforvariousscenes.Note：CRS，Cell-specificReferenceSignalCell-specificreferencesignal42OneantennaportTM1：Singleantennaporttransmission2.2TD-LTEDownlinkPhysicalChannelandSignalClassificationPrimarysynchronizationsignalSecondarysynchronizationsignalEffectGettimesynchronizationdeterminetheuniquephysicalcellIDClassificationCell-specificreferencesignalDemodulationreferencesignalMBSFNreferencesignalSynchronizationsignalReferencesignal43DownlinkphysicalsignalEffectCellsearchDownstreamchannelqualitymeasurementDownstreamchannelestimationforcoherent

detectionanddemodulationattheUEside2.2TD-LTEDownlinkPhysicalChannelandSignall=0l=6l=0l=6l=0l=6l=0l=6l=0l=6l=0l=6l=0l=6l=0l=6l=0l=6l=0l=6l=0l=6l=0l=6Resourceelement(k,l)NotusedfortransmissiononthisantennaportReferencesymbolsonthisantennaportNormalCP44Singleantennaport2antennaport4antennaportl=0l=6l=0l=6Cell-specificReferenceSignals2.2Multi-antennaTechnologyUsedtoenhancecellcoverage.AsaretracemodeforTM3/4/5/6/7.ImplementationofLTEinSFBC+FSTD.

eNBside

2TXConfigurationeNBside4TXNote：SFBC：SpaceFrequencyBlockCodeFSTD：FrequencySwitchedTransmitDiversity45TM2：Transmitdiversity2.2Multi-antennaTechnologyAlargedelay(CDD)spacemultiplexing,thereceiverdoesnotneedtosendbacktothesenderfeedbackprecodingmatrixinformation.

Usedtoimprovetheaveragecellspectralefficiencyandpeakrate.

AppliestohighspeedMobilescene.Note：CDD：CyclicDelayDiversity46TM3：Openloopspacereuse2.2Multi-antennaTechnologyThesendingendneedstofeedthereceiverwithfeedbackoftheprecodingmatrixinformation.Usedtoimprovetheaveragecellspectralefficiencyandpeakrate.AppliestolowspeedMobilescenes.47TM4：Closed-loopspacereuse2.2Multi-antennaTechnologyOnlysupportseachusersingle-layertransmission,andthemaximumsupportfortwolayers.Usedtoimprovetheaveragecellspectralefficiencyandsystemcapacity.48TM5：Multi-userMIMO2.2Multi-antennaTechnologyUsedtoenhancecellcoverage.Minimizethebearer-relatedcontrolsignalingasmuchaspossible.Onlyrank=1issupportedfortransmission49TM6：ClosedloopRANK=1precoding2.2Multi-antennaTechnologyPDSCHisdemodulatedonDRS(DedicatedReferenceSignal)onport5.Usedtoimprovethecoverageofthecelledgeuser.Single-streambeamforming

isanon-codebeamformingbasedonadedicatedpilot.MainlyforTD-LTEsystem50UETM7：Single-streambeamformingCell-specificreferencesignal2.2Multi-antennaTechnologyDoublebeambeamformingcombinesbeamformingtechnologywithspatialmultiplexing.Bothtoimprovethecelledgeusercoverage,butalsocanenhancethecellcenteruser‘sthroughput.Thedual-streambeamformingisanon-codebeamformingbasedonadedicatedpilot.Dual-streambeamformingisanenhancedtechnologyinTD-LTERel-9.51TM8：Doubleflowbeamforming2.2Multi-antennaTechnologyTerminaltype12345PeakrateDL1050100150300UL525505075ModulationmodeDLQPSK，16QAM，64QAMULQPSK，16QAMQPSK，16QAM，64QAM2

antennareceivediversityDLSupport(toRAN4performanceindicatorstoforcetherequest)2*2MIMODLnotsupportSupport4*4MIMODLnotsupportSupportTxModeMajorMIMOtechnologyApplicablesceneDescriptionTM1SingleantennatransmissionTheUEsetsupasingletransmitter,celledgeRel-8/9TM2Closed-loopspace-divisionmultiplexingHighnoiseratio,lowcorrelation,lowspeedMobileRel-1052TerminalLTEmulti-antennaThinkingquestionsWhataretheadvantagesofMIMO?2.Whyswitchbetweenmodes?3.Whatmodelscanimprovetheperformanceoftheterminalattheedgeofthecell?302.1OrthogonalFrequencyDivisionMultipleAccess2.2Multi-antennaTechnology2.3InterferenceSuppressionTechnologyTD-LTEOverviewTD-LTEKeyTechnologiesFrameStructureandPhysicalChannelMapping2.3InterferenceSuppressionTechnologyThetechnologyhas：InterferencerandomizationtechnologyInterferencecancellationtechnologyInterferencecoordinationtechnology（ICIC）55Theinter-cellinterferencemainlycomesfromthesamefrequencyinterferencecausedbythesamefrequencynetwork.InterferencerandomizationInterferenceeliminationInterferencecoordinationScramblingIntertwinedFrequencyhoppingRadarbeamformingIRCFrequencyresourcecoordinationPowerresourcecoordinationTimedomainresourcecoordinationIt’samulti-cellradioresourcemanagementschemethattakesintoaccounttheuseofresourcesandloadinapluralityofcells.Thebasicidea:bycoordinatingtheradioresourcesbetweenthecellssothatinterferenceiscontrolledCoordinatedradioresourceshas：Time-frequencyresourcesAcertaintimefrequencyresourcesonthepowerresourcesRole:reduceinter-cellinterference,enhancethecelledgeUEperformance2.3InterferenceSuppressionTechnology56Inter-cellinterferencecoordination（ICIC）ICICPartialfrequencyreuseSoftfrequencyreuseFullfrequencyreuse

ClassifiedbyresourceschedulingICICStaticallocationSemi-staticallocationDynamicallocationCoordinationscheduling

Sortbyresourceschedulingcycle2.3InterferenceSuppressionTechnology57Inter-cellinterferencecoordinationICICtoachievealotofways:StaticschedulingSemi-staticschedulingDynamicschedulingCollaborativeschedulingSoftfrequencyreuse√√√×Partialfrequencyreuse√√√×Allfrequencyreuse×√√√Thinkingquestions30Whyisthereinterference?WhatistheInterferencesuppressiontechnology？Usingthisseriesoftechniques,cantheinterferencebecompletelyeliminated?TD-LTE

PrinciplesandKeyTechnologiesTD-LTEOverviewTD-LTEKeyTechnologiesFrameStructureandPhysicalChannelMapping3.1TD-LTEPhysicalLayerOverview3.2TD-LTEFrameStructureandPhysicalResources3.3

TD-LTEDownlinkPhysicalChannel

andSignalTD-LTEOverviewTD-LTEKeyTechnologiesFrameStructureandPhysicalChannelMapping3.4

TD-LTEUplinkPhysicalChannelandSignal3.1TD-LTEPhysicalLayerOverviewPhysicallayer

主要特征MultipleaccessschemeDuplexmodepacketswitchingMIMODownlink

uses

OFDMUplink

uses

SC-FDMASupportfrequencydivisionduplex(FDD)andtimedivisionduplex(TDD)twomodesBasedontheideaofpacketswitching,theuseofsharedchannelsSupportmultipleinputmultipleoutput(MIMO)transmission613.1TD-LTEPhysicalLayerOverviewSupportsmultiplebandwidthsettings：1.4MHz3.0MHz5MHz10MHz15MHz20MHzSystembandwidth（MHz）1.435101520Numberofsubcarriers(pcs)72180

3006009001200623.1TD-LTEPhysicalLayerOverview3.2TD-LTEFrameStructureandPhysicalResources3.3

TD-LTEDownlinkPhysicalChannel

andSignalTD-LTEOverviewTD-LTEKeyTechnologiesFrameStructureandPhysicalChannelMapping3.4

TD-LTEUplinkPhysicalChannelandSignal3.2TD-LTEFrameStructureandPhysicalResourcesAradioframewithalengthof10msconsistsof10subframesoflength1ms；Eachsubframeconsistsoftwoslotswithalengthof0.5ms；1radioframe，Tf=307200*Ts=10ms1timeslot，Tslot=15360*Ts=0.5ms1

subframe#1#0#3#2#19#18……64FDD

framestructureOne10msradioframeiscomposedoftwo5msfieldsEachfieldconsistsoffive1mssubframesNormalsubframe:consistsof2timeslotsSpecialsubframe:consistsofDwPTS,GPandUpPTSSupports5msand10msuplinktransitionpointcycles3.2TD-LTEFrameStructureandPhysicalResources651radioframe，Tf=307200*Ts=10mssubframe#0subframe#3subframe#2subframe#5#1#01

field，153600*Ts=5mssubframe#4subframe#9subframe#8subframe#71timeslot，Tslot=15360*Ts=0.5ms30720*Ts=1ms1個(gè)subframe，30720TsDwPTSGPUpPTSDwPTSGPUpPTSTDDframestructure3.2TD-LTEFrameStructureandPhysicalResources66Specialtimeslotstructure1msDwPTSGPUpPTSD：S：U=1：1：3D：S：U=2：1：2D：S：U=3：1：1D：S：U=6：1：3D：S：U=7：1：2D：S：U=8：1：1D：S：U=3：2：51msuplinkdownlinkDwPTS10msTDDframestructure：UL/DLconfigurationandspecialtimeslotstructure3.2TD-LTEFrameStructureandPhysicalResourcesSpecialsubframeconfigurationNormalCPExtendedCPDwPTSGPUpPTSDwPTSGPUpPTS031013811948321039231121014121372539282693917102---8111---67TDDframestructure：specialsubframeconfiguration3.2TD-LTEFrameStructureandPhysicalResources68TD-LTEphysicalresourceconceptUsedtodistinguishthespatialdifferencesinresourcesPhysicalresourceOFDMsymbolAntennaportframeSubframeTimeslotSubcarrier