主要技術(shù)介紹

LTE主要技術(shù)介COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL

通信人才網(wǎng) 2COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALLRIGHTS通信人才網(wǎng) LTE標(biāo)準(zhǔn)演COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL

通信人才網(wǎng) 3GPP標(biāo)準(zhǔn)演Release9:Stage3Dec

Release10:Stage3Dec

KickoffinRANLTEworkshopNov2004

Dec2004

LTEWorkItemMarch

Release8:LTEStage3“complete”Dec4COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL

通信人才網(wǎng) LTE協(xié)議標(biāo)準(zhǔn)介5COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALLRIGHTS通信人才網(wǎng) Release作為第一版的LTE標(biāo)準(zhǔn)，Rel- 年月凍Rel-8的主要內(nèi)容包括以下幾個方IMS,OAM-6COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) ReleaseRel- 年月凍結(jié)，在LTE方面主要有以下新內(nèi)容definitionofLTEPicoBSRFrequirementsforLTEPicoBSintroductionofBStransmissionandreceptionrequirements,butnonewbasebandperformanceupdateofconformancetestdual-layerBFRel-8single-layBF,和邊緣用戶體驗，Rel-9定義了dual-layerBF。MBMS,SON7COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) Release10LTECarrierEnhancedDownlinkMultipleAntennaTransmissionforUplinkMultipleAntennaTransmissionforRelaysforEnhancedICICfornon-CAbasedLTESONHNBandHeNBMobilityFurtherEnhancementstoMBMSforMinimizationofDriveTestforE-UTRANandLocalIPInDeviceco-existenceandinterferenceNetworkImprovementsforMachine-TypeLTETDDin2600MHzforFixedWirelessCustomer-PremisesEquipment(CPE)RFAdding2GHzbandLTEforATCofMSSinNorthAddingL-BandLTEforATCofMSSinNorthExpanded1900MHzBandforUTRAandExtending850MHz(Feature)-UpperBand(814–8498COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) Release10LTECarrierTofulfiltheLTE-Advancedrequirementsasspecifiedin36.913,LTE-Advancedneedstoalsosupportwidertransmissionbandwidthsthanthecurrentlysupported20MHzspecifiedinRel.8/9whilemaintainingthebackwardscompatibilitywithRel-8/9.ThepreferredsolutiontothisiscarrieraggregationasdefinedduringtheLTE-Advancedstudyitem,wheremultiplecomponentcarriersareaggregatedtoformalargeroveralltransmissionbandwidthEnhancedDownlinkMultipleAntennaTransmissionforEnhancedmulti-antennaoperationforsupportingdownlinkSU-MIMOwithuptoeightlayerspatialmultiplexingisneededtofulfiltargetinTR36.913forLTE-Advancedonpeakratespectralefficiencyof30b/s/Hz.UplinkMultipleAntennaTransmissionforThemulti-antennaoperationforsupportingULSU-MIMOwithuptofourlayerspatialmultiplexingisneededtofulfilrequirementsinTR36.913forLTE-Advancedonpeakratespectralefficiencyof15b/s/Hz.DuringtheLTE-Advancedstudyitem,ULtransmissiondiversityforPUCCHandcodebookbasedtransmissionforPUSCHwillhelpensurethatLTE-Advancedsystemdeploymentsoffergoodcelledgeandaverageperformance.9COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) Release10LTERelaysforRelayshavebeenstudiedaspartoftheLTE-Advancedstudyitem.OneoftheprimeperceivedbenefitsofrelayingistoprovideextendedLTEcoverageintargetedareasatlowcost.ProvidingthisfeatureasearlyaspossibleisthuscrucialtoenableoperatorstomeetuserexpectationsforLTE, isetake-upofLTEFurtherenhancementstoMBMSforInRel-9acoresetofMBMSfeatureswasspecified.ThereisaneedtofurtherevolvethisfeaturesetinordertomaketheMBMSofLTEcompetitive.COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) 3GPP36seriesRANRANRAN

Layer1GeneralDescriptionPhysicalchannelandmodulationMultiplexingandchannelcodingLayer1procedureLayer1EUTRANoveralldescription(stage2)ServicesprovidedbyLayer1UEprocedureinIdleModeUEcapabilitiesLayer2–MeasurementsS1generaldescriptionS1layer1S1signalingS1datatransportX2generaldescriptionX2layerX2signalingtransportX2data

RANRAN

36.521-UE36.521-UEUERRMconformance36.523-Protocol36.523-36.523-

UETxRxBSTxRepeaterTxRxBSandRepeaterEMCUERRMrequirementsBSconformancetestRepeaterconformanceUEconformance–commontestenvironmentSpecialtestfunctionsUETxRxCOPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL

通信人才網(wǎng) LTE網(wǎng)絡(luò)架COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL

通信人才網(wǎng) LTE全I(xiàn)P扁平化網(wǎng)CS

4

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PDNCOPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL

通信人才網(wǎng) EPC架構(gòu)概 PDN-AF,例如

IPCOPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL

通信人才網(wǎng) LTE全I(xiàn)P扁平化網(wǎng)COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALLRIGHTS通信人才網(wǎng) COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL

通信人才網(wǎng) COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) WhyWhyCOPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALLRIGHTS通信人才網(wǎng) 為什么選擇 COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) 為什么選擇COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) WhatWhatOFDMisBadfor?COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALLRIGHTS通信人才網(wǎng) OFDM有什么缺點OFDM的另一個顯著缺點是很高的峰均比（highpeaktoaverageCOPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) 高復(fù)雜DFT/FFTDFT/FFTImplementation COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) DFT/FFT在每個OFDM符號之前插入循環(huán)前綴（CyclicPrefix,CP）以在多徑 COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) 均COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) LTE下行多址技術(shù)-COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) LTE下行多址技術(shù)-COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) LTE上行多址技術(shù)-SC集中式：占用連續(xù)的頻譜，是整個帶寬的一部分布式：占用離散頻譜，LTE不支COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL

通信人才網(wǎng) MIMO介 信道的良好抗性（CreateCOPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) MIMO介空時編碼（AlamoutiCOPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) MIMO介空時編碼（Alamouti

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-S*1S 0接收端收到的四個獨立副本基帶信號COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) MIMO介空時編碼（Alamouti單一信道發(fā)生深 時，對接收端恢復(fù)發(fā)送信號影響較有4個不同的信道副本，分集數(shù)為不能提高吞吐量上述編碼分配對 載波f和f+1，則這種編碼方式又稱作空頻編碼COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) 調(diào)制：QPSK16QAM,COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) 層映COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) 層映COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) 預(yù)編單天線端口預(yù)編碼，空間復(fù)用預(yù)編碼OPMIMO:不需要終端上報 具體公式參考COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) MIMO的三種主要工作方發(fā)送分集(TX在發(fā)射端對數(shù)據(jù)流進(jìn)行聯(lián)合編碼以減小由于信道和噪聲所導(dǎo)致的符號錯誤率。數(shù)據(jù)的混合信號后，利用不同空間信道間獨立的特性，區(qū)分出這些并行的數(shù)據(jù)波束賦形(BeamCOPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL MIMO的三種主要工作方 發(fā)送分集發(fā)送分集(TX C1

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SFBC編CnSFBC編

SFBC S’

COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL

通信人才網(wǎng) MIMO的三種主要工作方 發(fā)送分集射方式無法獲取空間并行信道帶來的速率紅利，發(fā)送分集方案不能提高數(shù)據(jù)率。當(dāng)信道間相 低COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) MIMO的三種主要工作方 空分復(fù)用空分復(fù)用(Spatial┅┅┅┅┅┅┅┅┅COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) MIMO的三種主要工作方 空分復(fù)用 CL- OL-高高COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) MIMO的三種主要工作方 波束賦形波束賦形波束成型技術(shù)又稱為智能天線，通過對多根天線輸出信號的相關(guān)性進(jìn)行相位，使COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) DCISearchTransmissionschemeofPDSCHcorrespondingtoPDCCHModeDCISearchTransmissionschemeofPDSCHcorrespondingtoPDCCHModeDCIformatCommonUEspecificbyC-DCIformatUEspecificbyC-ModeDCIformatCommonUEspecificbyC-DCIformatUEspecificbyC-ModeDCIformatCommonUEspecificbyC-DCIformatUEspecificbyC-LargedelayCDD(seesubclause7.1.3)ModeDCIformatCommonUEspecificbyC-DCIformatUEspecificbyC-Closed-loopspatialmultiplexing(seeModeDCIformatCommonUEspecificbyC-DCIformatUEspecificbyC-ModeDCIformatCommonUEspecificbyC-DCIformatUEspecificbyC-Closed-loopspatialmultiplexing(seeModeDCIformatCommonUEspecificbyC-IfthenumberofPBCHantennaportsisone,Single-antennaport,port0isused(seesubclause7.1.1),otherwiseTransmitDCIformatUEspecificbyC-ModeDCIformatCommonUEspecificbyC-IfthenumberofPBCHantennaportsisone,Single-antennaport,port0isused(seesubclause7.1.1),otherwiseTransmitDCIformat?2011ALCA-LUCENTSHANGHAIBELL.ALLDuallayertransmission;port7and8TSRlSRD.通信人才網(wǎng) LTE物理層介紹-下行物理信COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL

通信人才網(wǎng) 物理資源概念-資源塊（Resource子子(PCFICH,PDCCH,PHICH)ResourceBlock=7OFDMSymbolsx1215Slot(0.5 Slot(0.5 Subframe(1COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) 物理資源概念-帶寬對應(yīng)資1007550525531536COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) 物理資源概念-每個REG包括4個連續(xù)可用下行控制域RE集合，用于下行控制信道資源映COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) 物理資源概念--控制信道粒CCEcontrolchannel1CCE=9REG=36CCE數(shù)目的確 一個PDCCH可映射到，1,2,4,8個PDCCHNumberofNumberofPDCCH01122438COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) 總1.435101520Slot0.5Sub-1.0ms(=215kHz(7.5kHzfor1.92(1/23.847.68(215.36(423.04(630.72(8FFTNumbersub-751503006009001200persubframe7(shortCP),6(long4.69sx6,5.21sx16.67COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) LTE下行信道映PCCH:pagingcontrolchannelBCCH:broadcastcontrolchannelCCCH:commoncontrolchannelDCCH:dedicatedcontrolchannelDTCH:dedicatedtrafficchannelPCH:pagingBCH:broadcastDL-SCH:DLshared

LTEmakesheavyuseofsharedchannelscommoncontrol,paging,andpartofbroadcastinformationcarriedonCOPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL

通信人才網(wǎng) LTE下行鏈路：公共參考信號（RS）結(jié)COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) LTE下行鏈路：用于1,2和4天線端口的公共RS結(jié)COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALLRIGHTS通信人才網(wǎng) P-SCH&S-SCH,PBCH介COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALLRIGHTS通信人才網(wǎng) SSS&PSS位 COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng)

501234…5

forS-SCH

0S0=(m0,m1)S1=(m1,m0)S2=(m0,m1)S3 RadioRadioframeRadioframesubframe

subframesubframe

TDD:5msperiodicityPSS->lastsymbolinslot#1subframeSSS->the3rdsymbolsubframeCOPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL

通信人才網(wǎng) 物理廣播信道物理廣播信周期40ms子幀#0，時隙#1，符號72個子載波，占據(jù)頻帶中間多天線時采用發(fā)射分集方式發(fā)

攜帶MIB消息共24帶寬信PHICH置信息系統(tǒng)幀號 PBCHTTI=Radioframe=10ms Subframe=1ms

CodedBCHtransportCOPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) 物理下行公共控制信道PDCCHCCE1,2,4,or876543210n76543210

COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL

通信人才網(wǎng) 物理下行公共控制信道COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALLRIGHTS通信人才網(wǎng) 物理控制格式指示信道

COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) 物理HARQ指示信道：COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) 移動通 物理下行共享信TransportblockCRCTransportblockCRC CodeblocksegmentationandcodeblockCRCatta Per-code-blockCRCallowspowersavingsindecoderwithearlytermination,alsoallowsparallelprocessingofcodeCodeblocksegmentationandcodeblockCRCatta RateChannelR=1/3turbocodefromUMTSbutwithimprovedturbointerleaver(QPP)whichRateChannelCodeblockSimplifiedcircularbufferratematchingwithsub-blockinterleaving;ratematchingispercodeblocktoallowparallelprocessingCodeblockBit-levelPer-userbitlevelscramblingintroducedforinterferenceBit-levelPDSCHsupportsQPSK,16-QAM,and64-COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) 下行信道總TransportDL-

CodingTurboTurboR=1/3

Physical

QPSK,16-QAM,64-

CodingBlockcodeR=1/16RepetitionR=1/3ConvolutionR=1/3dependingonCCEaggregationlevel

Physical

COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL

通信人才網(wǎng) LTE物理層介紹-上行物理信COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL

通信人才網(wǎng) 上行參考信號COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALLRIGHTS通信人才網(wǎng) 上行參考信號UEUE1UE

DM-RStransmittedonlyoverbandwidthallocatedtoUESRScanbetransmittedoverawidebandwidthtoallowchannelqualityestimationbytheeNBuplinkschedulerCyclicshiftorthogonalsequencesusedtoseparateoutdifferentUEsSRS(8possibleRepetitionfactor(RPF)=2createstwofrequencycombsforincreasedmultiplexingUEUEUE3

Slot=

Slot=

RulesforSRSSRSonlyspansPUSCHSRSisnottransmittedatthesametimeasCQIorSchedulingRequest(SR)onPUCCHShortenedACK/NACKformatisusedonPUCCHtoallowtransmissionofSRSwhilemaintainingsingle-carriertransmissionCOPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL

通信人才網(wǎng) 上行參考信號COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) 物理上行控制信所占頻率位于系統(tǒng)頻率兩PUCCH不與PUSCH一起發(fā)當(dāng)存在PUSCH傳輸時，若需要發(fā)送ACK/NACK或者CQI，則其必須與PUSCH復(fù)與PUSCH相比，對可靠性的要求更System0.5msSystem

COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL

通信人才網(wǎng) 物理上行控制信COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALLRIGHTS通信人才網(wǎng) 物理隨機接入信UE通過解調(diào)SCH獲得下行同步，然后可以發(fā)送前導(dǎo)序eNB通過檢測前導(dǎo)序列，發(fā)送TA命令給UE用于上行同Maxcellsize(m)=3E8*

GaptimereflectsthetiminguncertaintyduetoroundtrippropagationdelayMax1~0.10.8Max1~0.10.8~0.1~1520.8~0.52~0.21.6~0.2~3031.6~0.7~100Formats#2and#3offera2x0.8mspreamblerepetitiontoimprovedetectionperformanceinpoorchannelconditionsfRA=1/0.8ms=1.25kHz sensitivitytodopplershiftfromhighspeedUEs(greaterthan~120km/hr)Rootsequencelength=839;differentsignaturesaregeneratedbyfirstusingdifferentcyclicshiftsofasinglerootsequence(orthogonal),andthenusingadditionalrootsequencesasneeded(lowCOPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL

通信人才網(wǎng) 物理上行共享信TransportblockTransportblockdecoderwithearlycodeblockCRCdecoderwithearlycodeblockCRC CodeblocksegmentationRateChannelR=1/3turbocodewithimprovedturboRateChannelCodesub-blockinterleaving;ratematchingisCodecontrolBit-levelcontrolBit-level

Muxcontrolwhenneeded;dataisratematchedaroundCQI/PMI,butACK/NACKpuncturesoutdata(keptindep.fromRMtomaintainturn-around)Per-userbitlevelscramblingintroducedforinterferencerandomizationPUSCHsupportsQPSKand16-QAM;64-QAMisCOPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL

通信人才網(wǎng) RNTI總COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL

通信人才網(wǎng) RNTI總RNTIRadioNetworkTemporaryWhy在接收信息時，物理層根據(jù)的指示，使用特定的RNTI進(jìn)行PDCCH搜索，根據(jù)RNTI根據(jù)不同的用途C-RNTICellP-RNTIPagingRA-RNTIRandomAccessSI-RNTISystemInformationTPC-PUCCH-RNTITransmitPowerControl-PhysicalUplinkControlChannel-COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) RNTI總RNTICOPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) RNTI總COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) 基本信令流COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL

通信人才網(wǎng) 隨機接入過2.1.基于競爭：適用于所有52.DLCOPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) 隨機接入過of6bitsofdataResponseonDL-

RandomAccess

RandomAccessPreambleInitialULTemporaryC-(foroneormultipleRandomAccessOnUL-SCHwith

ScheduledContention

OnDL-SCH&

UEHARQfeedbackwhenitsIdmatcheswithUEIdechoesinRRCContentionResolutionmessageCOPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL

Variable-sizemessageconsistingofUEId,C-RNTINASmessagecanbe通信人才網(wǎng) 移動通 Preamble–PreambleThereare64preamblesavailableineachIfIfUEhavelargesizeMSG3andgoodradioitwillselectGroupCOPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) RAProcedures----Initial plusthree

message-DetectPreambleIndex,-AllocateTempC--DetectPreambleIndex,-AllocateTempC-RamdonPreambleIndex,f_id,message2(PDCCHaddressonRA-PreambleIndex=SaveTempC--GenerateandsaveULCCCHSDUPDSCH:{1ornPreambleIndex=SaveTempC--GenerateandsaveULCCCHSDU-CompareUEContentionResolutionIDwithULCCCHSDU,ifequal:setC-RNTI<=TempC-RNTI;deliveryDLCCCHSDUtoRRCContentionresolved,RA

message3(PUSCH:UL-SCH:SRB0:CCCHeNBfoundthereisCCCHSDUinreceivedMAC,saveeNBfoundthereisCCCHSDUinreceivedMAC,savetheCCCHSDUforthisTempC-RNTI(s-TMSIorRandomValueisGenerateDLCCCHSDU,"UEContentionResolutionGenerateDLCCCHSDU,"UEContentionResolution=ULCCCHPDSCH:{UEContentionResolutionId,DL-SCH:SRB0:CCCHDLCCCHSDU:RRCCONNECTIONPUSCH:UL-SCH:SRB1:DCCHULDCCHSDU:RRCCONNECTIONSETUPCOPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL

通信人才網(wǎng) RAProcedures----DLdataarrival

message0(PDCCHaddressonC-PDCCHOrderviaDCI1A{Preamble

-DetectPreambleIndex,-DetectPreambleIndex,-AllocateTempC-RNTIsetTempC-RNTI=C-noinfluenceonUEPreambleIndex,f_id,allocatedbyPRACH:Preambleinat/f-Compare:TempC-RNTIisdiscard,RAsuccess message2(PDCCH-Compare:TempC-RNTIisdiscard,RAsuccessPDSCH:{1ornRAPID,[BI],1ornRAR(TA,ULGrant,TempC-PDSCH:{DLCOPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) 下行數(shù)據(jù)傳

PUCCH/ReportedPUCCH/Reported

Scheduling

ControlInformation(PDCCH)Datatransmission(PDSCH)PUCCH/Ack-

COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL

通信人才網(wǎng) 上行數(shù)據(jù)傳

PUCCH/SchedulingPDCCH/Scheduling

SchedulingDatarateselectionatPUCCH/Control&DataPDCCH/Ack-

COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL

通信人才網(wǎng) COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL

通信人才網(wǎng) LTE空口協(xié)議棧-控制平 COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) LTE空口協(xié)議棧-控制平

NASsub-layerSecurityIdlemodemobilityIdlemodepaginggPDCPsub-layergIntegrityprotection&

RRCRRCRadiobearerMobilityUEmeasurementreporting& COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) LTE空口協(xié)議棧-用戶平 COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) LTE空口協(xié)議棧-用戶平Physicalsub-layerDL:ODFMA,UL:SC-ULpowerMulti-streamtransmission&reception(i.e.

PDCPsub-layerHeaderRLCsub-layerTransferringupperlayerIn-sequencedeliveryofFlowMACsub-layerErrorcorrectionthroughPriorityhandlingacrossUEs&logicalIn-sequencedeliveryofRLCradiobearersinto/fromPhCHson COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) LTE空口協(xié)議總NAS（Non-AccessStratum）非接入層協(xié)議，UE與 RRC（RadioResourceControl）層主要通過信令傳輸來控制UE的行為COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) RRC狀態(tài)和狀態(tài)轉(zhuǎn)LTE中RRC只有兩種狀態(tài)：RRC_CONNECTED和RRC_IDLE如果RRC連接已建立，UE處于RRC_CONNECTED狀態(tài)，如果RRC連接未建，UE處于RRC_IDLE狀態(tài)RRC_IDLE狀態(tài)描述特定的DRX配系統(tǒng)信息廣尋鄰小區(qū)測量和小區(qū)選

RRC_CONNECTED狀態(tài)描-特定的DRX配-鄰小區(qū)測量上-信道質(zhì)量反COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) DataNoActiveDataNoActiveActivateRFDeactivateRFRRCConnectedAttachtoDetachfromEstablishRRCRRCConnectionAttachedLTEDetachedActiveDetachedIdleUEisengagedinactiveIdleDormantNotnecessarilyactivelyscheduled&sendingDormantEnterExitEnterExitEmptyRRCConnectedUEhasanRRCconnectionCanbeCOPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) LTE各關(guān)鍵狀態(tài)定COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) LTE各關(guān)鍵狀態(tài)定,COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) NAS消息傳NAS傳輸是S1接口過程，在UE和MME之間傳遞信令eNB不做任何處通過三條消息來傳遞NAS信INITIALUEDOWNLINKNASUPLINKNASCOPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) NAS消息傳INITIALUEENB從空口收到第一條 INITIALUEMESSAGE消息。消息中包含：ENBUES1APNASEUTRANCOPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) NAS消息傳DOWNLINKNASENBUES1APNASMMEUES1APCOPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) NAS消息傳UPLINKNASENBUES1APNASEUTRANMMEUES1APCOPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) NAS消息傳NASNONDELIVERYNASNONDELIVERYIND來向MME報告，該消息中包括：ENBUES1APNASCOPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) 系統(tǒng)信息廣 ?系統(tǒng)信息通過系統(tǒng)信息塊（SIB）的方式來組織，每一個SIB集合了某 COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) 系統(tǒng)信息廣COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) 系統(tǒng)信息廣SI-window在無線幀級別上連續(xù)，具有可配置的公共長COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) 系統(tǒng)消息廣COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) 系統(tǒng)消息廣LTE通過兩種方式來指示系統(tǒng)信息發(fā)通過尋呼指示系統(tǒng)消息改 COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) LTE空口協(xié)議總 COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) LTE空口協(xié)議總TM（透明模式）對于PDCP層來的RLCSDU，RLC層不做任何處理，直接映射到RLCPDU，反 COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) LTE空口協(xié)議總COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) LTE空口協(xié)議總 COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL

通信人才網(wǎng) LTE移動性管LTE支持LTE內(nèi)的移動性，也支持3GPP和非3GPP系統(tǒng)間的移動LTE內(nèi)的移動性包含兩類切換流程，即S1切換流程和X2切換流COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) X2-basedhandoverwithoutServingGW

Downlinkanduplink

PDNForwardingof

Uplinkdata1PathSwitch3

2UserPlaneUpdateUserPlaneUpdate

End

4.EndPathSwitchRequest7.TrackingAreaUpdateCOPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) X2-basedhandoverwithoutServingGW ThetargeteNodeBsendsaPathSwitchRequestmessagetoMMEtoinformthattheUEhaschangedcell,includingtheECGIofthetargetcellandthelistofrejectedEPSbearers.TheMMEdeterminesthattheServingGWcancontinuetoservetheUE TheMMEsendsaUserPlaneUpdateRequest(eNodeBaddress(es)andTEIDsfordownlinkuserplanefortheacceptedEPSbearers)messagetotheServingGW. IncaseanyEPSbearersaretobereleasedtheMMEtriggersthebearerreleaseprocedureasspecifiedinclause. TheServingGWstartssendingdownlinkpacketstothetargeteNodeBusingthenewlyreceivedaddressandTEIDs.AUserPlaneUpdateResponsemessageissentbacktotheMME. InordertoassistthereorderingfunctioninthetargeteNB,theServingGWshallsendonemore"endmarker"packetsontheoldpath yafterswitchingthepathasdefinedTS36.300[5],clause TheMMEconfirmsthePathSwitchRequestmessagewiththePathSwitchRequestAck BysendingReleaseResourcethetargeteNodeBinformssuccessofthehandovertosourceeNodeBandtriggersthereleaseofresources.ThisstepisspecifiedinTS36.300[5]. TheUEinitiatesaTrackingAreaUpdateprocedurewhenoneoftheconditionslistedinclause"Triggersfortrackingareaupdate"applies.COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) X2-basedhandoverwithPDNPDNDownlinkanduplinkdoverdoververexecutionForwardingofd

UplinkPathSwitch4.Create4.Create3a.UpdateBearer3b.UpdateBearerrerer7a.DeletePathSwitchUplinkRelease7b.7b.Deleteerate8.TrackingAreaateCOPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) X2-basedhandoverwithServingGW ThetargeteNodeBsendsaPathSwitchRequestmessagetoMMEtoinformthattheUEhaschangedcell,includingtheECGIofthetargetcellandthelistofrejectedEPSbearers.TheMMEdeterminesthattheServingGWisrelocatedandselectsanewServingGWaccordingtoclauseon"ServingGWSelectionFunction". TheMMEsendsaCreateBearerRequest(bearercontext(s)withPDNGWaddressesandTEIDs(forGTP-basedS5/S8)orGREkeys(forPMIP-basedS5/S8)atthePDNGW(s)foruplinktraffic,eNodeBaddress(es)andTEIDsfordownlinkuserplanefortheacceptedEPSbearers,theProtocolTypeoverS5/S8)messagetothetargetServingGW.ThetargetServingGWallocatestheS-GWaddressesandTEIDsfortheuplinktrafficonS1_Ureferencepoint(oneTEIDperbearer).TheProtocolTypeoverS5/S8isprovidedtoServingGWwhichprotocolshouldbeusedoverS5/S8interface. IncaseanyEPSbearersaretobereleasedtheMMEtriggersthebearerreleaseprocedureasspecifiedinclause. ThetargetServingGWassignsaddressesandTEIDs(oneperbearer)fordownlinktrafficfromthePDNGW.ItsendsanUpdateBearerRequest(ServingGWaddressesforuserplaneandTEID(s))messagetothePDNGW(s).ThePDNGWupdatesitscontextfieldandreturnsanUpdateBearerResponse(PDNGWaddressandTEID,MSISDN,etc.)messagetotheServingGW.TheMSISDNisincludedifthePDNGWhasitstoredinitsUEcontext.ThePDNGWstartssendingdownlinkpacketstothetargetGWusingthenewlyreceivedaddressandTEIDs.ThesedownlinkpacketswillusethenewdownlinkpathviathetargetServingGWtothetargeteNodeB.AnUpdateBearerResponsemessageissentbacktothetargetservingGW. ThetargetServingGWsendsaCreateBearerResponse(ServingGWaddressesanduplinkTEID(s)foruserplane)messagebacktothetargetMME.TheMMEstartsatimer,tobeusedinstep7. TheMMEconfirmsthePathSwitchRequestmessagewiththePathSwitchRequestAck(ServingGWaddressesanduplinkTEID(s)foruserplane)message.ThetargeteNodeBstartsusingthenewServingGWaddress(es)andTEID(s)forforwardingsubsequentuplinkpackets. BysendingReleaseResourcethetargeteNodeBinformssuccessofthehandovertosourceeNodeBandtriggersthereleaseofresources.ThisstepisspecifiedinTS36.300[5]. Whenthetimerhasexpiredafterstep4,thesourceMMEreleasesthebearer(s)inthesourceServingGWbysendingaDeleteBearerRequestmessage,whichisacknowledgedbytheServingGW. TheUEinitiatesaTrackingAreaUpdateprocedurewhenoneoftheconditionslistedinclause"Triggersfortrackingareaupdate"applies.COPYRIGHT?2011ALCA-LUCENTSHANGHAIBELL.ALL 通信人才網(wǎng) TheS1-basedhandoverprocedureisusedwhentheX2-basedhandovercannotbeused.ThesourceeNodeBinitiatesahandoverbysendingHandoverRequiredmessageovertheS1-MMEreferencepoint.ThisproceduremayrelocatetheMME;thisproceduremayalsorelocateboththeMMEandtheServingGW.ThesourceMMEselectsthetargetMME.TheMMEshouldnotberelocatedduringinter-eNodeBhandoverunlesstheUEleavestheMMEPoolAreawheretheUEisserved.ThetargetMMEdeterminesiftheServingGWneedstobeThesourceeNodeBdecideswhichoftheEPSbearersaresubjectforforwardingofpacketsfromthesourceeNodeBtothetargeteNodeB.TheEPCdoesnotchangethedecisionstakenbytheRANnode.PacketforwardingcantakeplaceeitherdirectlyfromthesourceeNodeBtothetargeteNodeB,orindirectlyfromthesourceeNodeBtothetargeteNodeBviathesourceandtargetServingGWsTheavailabilityofadirectforwardingpathisdeterminedinthesourceeNodeBandindicatedtothesourceMME.IfX2connectivityisavailablebetweenthesourceandtargeteNodeBs,adirectforwardingpathisavailable.Ifadirectfor