吳偉民電子與信息工程系wuwm@第一頁(yè)，共三十一頁(yè)。 Overview ProtocolStack MACLayerEvolution TransportChannel PhysicalChannels Evolution:HSDPA+ TerminalCapabilityClasses TimingStructures第二頁(yè)，共三十一頁(yè)。+ HSDPAstandsforHighSpeedDownlinkPacketData+ Release5featureof3GPP/UTRAN+ amajorupgradeto3Gsystemcapabilities+ HSDPAshortensround-triptimebetweennetworkandterminals+ HSDPAreducesvarianceindownlinktransmissiondelay+ HSDPAdoesnotimproveuplinkdatarates(seee-DCHcalledHSUPA)+ HSDPAusesDCHtransportchannel第三頁(yè)，共三十一頁(yè)。+ Optimizedforhigh-speeddownlinkdata >>onlySF=16codesused+ Shorterframes(2msincluding3Timeslots) >>enablesfasterreactionstochangingchannelconditions(AMC) >>enablesfasterretransmissionprotocol(HARQ)

+ AdaptativeModulationandCoding(AMC)adaptsthefollowing transmissionformatattributes >>modulationscheme(QPSK,16QAM) >>numberofphysicalchannel >>redundancyversion >>errorcorrectionrate+ TheUEmeasuresthechannelconditions,andindicatestoNode-B thehighestdatarate(AMC)itcouldsupportthroughCQIindication第四頁(yè)，共三十一頁(yè)。+ FastschedulingperformedbytheNodeB+ TheHARQprotocolimplementsafastacknowledgeddata transmissionscheme >>retransmissionsincludingtheoriginalinformationbits,butthedata packetcontainsmoreredundancy >>Stop-And-WaitARQschemeisusedinHSDPA>>NHARQProcesses,eachStop-And-WaitARQ

第五頁(yè)，共三十一頁(yè)。UE2UE3UE1>>MultiplexingSpreadingCodeforoneUEimposedbycapabilityclass>>UsersaremulitplexedbothintimeCodesTimeHS-DSCH-relatedSharedControlChannel(HS-SCCH)HS-DSCHHighSpeedPhysicalDownlinkSharedChannel(HS-PDSCH)DedicatedPhysicalControlChannel(uplink)forHS-DSCH(HS-DPCCH)第六頁(yè)，共三十一頁(yè)。+ UESide:MAC-hsisresponsiblefor >>HARQ-ACK(HybridAutomaticRepeatRequest) >>Re-ordering+ NodeBSide:MAC-hsisresponsiblefor >>FlowControl >>Scheduling/PriorityHandling >>HARQ >>TFRIMAC-dMAC-hsPHYMAC-hsPHYL1L2HS-DSCHFPL1L2HS-DSCHFPMAC-dUENodeBRNC第七頁(yè)，共三十一頁(yè)。NodeB:Scheduler(Rec25.321§11.6.1) >>SchedulesallUEswithinacell >>Servicespriorityqueues:

TheschedulerschedulesMAC-hsSDUsbasedoninformationfromupperlayers. OneUEmaybeassociatedwithoneormoreMAC-dflows. EachMAC-dflowcontainsHS-DSCHMAC-dPDUsforoneormorepriorityqueues

>>DeterminestheHARQEntityandthequeuetobeserved >>SetstheTSNfornewdatablocksbeingtransferredfromtheselectedqueue:

SettheTSNtovalue0forthefirstMAC-hsPDUtransmittedforeachQueueIDwithinanHS-DSCH IncrementtheTSNwithinoneforeachtransmittedMAC-hsPDUoneachQueueIDwithinanHS-DSCH

>>Schedulenewtransmissionsandretransmission(basedonthestatusreports fromHARQProcesses) >>Determinestheredundancyversion(foreachtransmittedandretransmitted MAC-hsPDU)第八頁(yè)，共三十一頁(yè)。NodeB:HARQEntity(Rec25.321§11.6.2) >>ThereisoneHARQentityforeachUe >>TheHARQentitysetstheQueueIDintransmittedMAC-hsPDUtovalue indicatedbyscheduler >>TheHARQentitysetsthetransmissionsequencenumber(TSN)intransmitted MAC-hsPDUtovalueindicatedbyschedulerNodeB:HARQProcess(Rec25.321§11.6.3) >>TheHARQprocesssetstheNewDataIndicatorintransmittedMAC-hsPDU: ●tothevalue“0”forfirstMAC-hsPDUtransmittedbyaHARQProcess ●notincrementforretransmissionofaMAC-hsPDU ●incrementwithoneforeachtransmittedMAC-hsPDUcontainingnewdata >>TheHARQprocessprocessesreceivedstatusmessagetothescheduler第九頁(yè)，共三十一頁(yè)。MAC-dforUEnMAC-dforUE2HARQProcessQueueID4TSN1NewDataIndHARQProcessQueueID1TSNNewDataIndHARQEntityUEnHARQProcessQueueID0TSN51NewDataIndHARQProcessQueueID1TSN59NewDataIndHARQEntityUE3HARQProcessQueueID0TSN60NewDataIndHARQProcessQueueID5TSN0NewDataIndHARQProcessQueueID1TSN5NewDataIndHARQEntityUE2HARQProcessSCHEDULERQueueID0TSN3NewDataIndNodeBSideHARQProcessQueueID7TSN20NewDataIndHARQProcessQueueID1TSN2NewDataIndHARQEntityUE1HARQProcessQueueID0TSN0NewDataIndMAC-dforUE1QueueID1TSN3NewDataInd第十頁(yè)，共三十一頁(yè)。ReorderingEntityUESideHARQProcessQueueID7TSN20NewDataIndHARQProcessQueueID1TSN2NewDataIndHARQEntityUE1HARQProcess(rec25.321§):IftheMAC-hsPDUisreceivedwithin5sub-framesfromthereceptionofthepreviousMAC-hsPDUintendedforthisHARQprocess

MAC-hdPDUisdiscardedACK/NACKHARQProcessQueueID0TSN0NewDataIndMAC-dforUE1第十一頁(yè)，共三十一頁(yè)。UESideMACArchitecture:Rec.25.321§4.2.3第十二頁(yè)，共三十一頁(yè)。UTRANSideMACArchitecture:Rec.25.321§4.2.4第十三頁(yè)，共三十一頁(yè)。MAC-hsSDUMAC-hsSDUMAC-hsSDUHeaderMACC/T=6RLCPDUHeaderMACC/T=6RLCPDUPaddingN-PDUHeaderPDCPRLCPayloadRLCHeaderPDCP:TCP/IPCompressedRLCPayloadRLCHeaderHeaderMACC/T=7RLCPDURLCPayloadRLCHeaderAMRBlockVoiceMAC-hsHeaderMAC-dPDUSize=336bitsMAC-dPDUSize=336bitsMAC-dPDUSize=144bits!!MAC-hsPDU!!UE1DataMAC-hsPayload第十四頁(yè)，共三十一頁(yè)。MAC-hsHeader:Rec.25.321§9.2.2VFQueueIDTSNSID1N1F1SID2N2F2VF(1bit):VersionFlag:extensioncapabilities0–Normal1–reservedQueueID(3bits):indicationforreorderingqueueinthereceiver,setby HARQEntityTSN(6bits):TransmissionSequenceNumber:usedforreorderingpurposes tosupportin-sequencedeliveryhigherlayers.NumberofSequence byQueueIDSID(3bits):SizeIndexIdentifier,indexcorrespondingtoMAC-dsizeofasetof consecutiveMAC-dPDUs Seein25.331§a?

MAC-dPDUsizeInfo

?N(7bits):SizeNumberofconsecutiveMAC-dPDUswithsameIndexSetMaxnumberPDUsperTTIinFDD70F(1bit):FlagindicatingifmorefieldsarepresentintheMAC-hsHeaderSIDkNkFk第十五頁(yè)，共三十一頁(yè)。HS-DSCH:High-SpeedDownlinkSharedChannel:Rec.25.212§4.5Slot0Slot1Slot22msOnetransportblockonceeveryTTI(2ms),associatedwithoneDCHCRCattachmentaim1,aim2,aim3,...aimACodeblocksegmentationChannelCoding(Rate1/3TurboCoding)dim1,dim2,dim3,...dimBoir1,oir2,oir3,...oirKBitScramblingbim1,bim2,bim3,...bimBPhysicalchannelsegmentationPhCH#1PhCH#PPhysicalLayerHybrid-ARQfunctionalityci1,ci2,ci3,...ciEvp,1,vp,2,vp,3,...vp,Uup,1,up,2,up,3,...up,Uw1,w2,w3,...wRHS-DSCHInterleavingPhysicalchannelmappingConstellationre-arrangementfor16QAMrp,1,rp,2,rp,3,...rp,U第十六頁(yè)，共三十一頁(yè)。HybridARQforHS-DSCH:Rec.25.212§4.5.4ThehybridARQfunctionalitymatchesthenumberofbitsattheoutputofthechannelcodertothetotalnumberofbitsoftheHS-PDSCHsettowhichtheHS-DSCHismapped.ThehybridARQfunctionalityiscontrolledbytheredundancyversion(RV)parameters.TheexactsetofbitsattheoutputofthehybridARQfunctionalitydependsonthenumberofinputbits,thenumberofoutputbits,andtheRVparameters.ThehybridARQfunctionalityconsistsoftworate-matchingstagesandavirtualbuffer.HS-DSCHhybridARQfunctionality第十七頁(yè)，共三十一頁(yè)。HS-PDSCH:HighSpeed-PhysicalDownlinkSharedChannelRec.25.211§3CodesTimeONLYONEblockHS-DSCHHS-PDSCHsk=4M=2forQPSK320bits/slotM=4for16QAM640bits/slotslot#0slot#1slot#2SizeofTransportBlock:TFRI第十八頁(yè)，共三十一頁(yè)。HS-SCCH:HighSpeed–SharedControlChannelRec.25.211§2TheHS-SCCHisafixedrate(60kbps,SF=128)downlinkphysicalchannelusedtocarrydownlinksignallingrelatedtoHS-DSCHtransmission第十九頁(yè)，共三十一頁(yè)。CodingforHS-SCCH,Rec.25.212§4.6HS-SCCHPart1HS-SCCHPart2Slotarealignedtimewith theCPICHRate1/3convolutioncodingQPSKmodulationUpto4HS-SCCHsperUE

(see25.214§6A.1.1)Slot#1Slot#2HS-SCCH:7680chipsSlot#0第二十頁(yè)，共三十一頁(yè)。CodingforHS-SCCH,Rec.25.212§4.6

UEidentity(16bits):xue,1,xue,2,…,xue,16UEidentityistheHS-DSCHRadioNetworkIdentifier(H-RNTIsetsinRadioBearerSetupmessage,see25.331§b)Channelization-code-setinformation(7bits):xccs,1,xccs,2,…,xccs,7P(multi-)codesstartingatcodeO

xccs,1,xccs,2,xccs,3=min(P-1,15-P)

xccs,4,xccs,5,xccs,6,xccs,7=|O-1-P/8*15|HS-PDSCHsslot#0slot#1slot#2

Modulationschemeinformation(1bit):xms,1第二十一頁(yè)，共三十一頁(yè)。Redundancyandconstellationversion(3bits):xrv,1,xrv,2,xrv,3ParametersofthesecondratematchingstageinHARQfunctionality(seeRec25.212§)Newdataindicator(1bit):xnd,1

Hybrid-ARQprocessinformation(3bits):xhap,1,xhap,2,xhap,3IdentifierprocesssentbyRRCinHARQInfo,see25.331§a >NumberofProcesses

>>Memorysize

<1toMaxHProcesses>

>>>ProcessMemorysize:Maximumnumberofsoftchannel bitsavailableinthevirtualIRbuffer

Transport-blocksizeinformation(6bits):xtbs,1,xtbs,2,…,xtbs,6TFRI(TransportFormatResourceIndicator),Rec25.321§9.2.3Letkt

bethesumofthetwovalues:kt

=ki

+k0,i.ThetransportblocksizeL(kt)canbeobtainedbyaccessingthepositionkt.

CodingforHS-SCCH,Rec.25.212§4.6第二十二頁(yè)，共三十一頁(yè)。CodingforHS-SCCH,Rec.25.321§AnnexA………第二十三頁(yè)，共三十一頁(yè)。HS-DPCCH,Rec.25.213§CodeAllocation,Rec25.213§.2第二十四頁(yè)，共三十一頁(yè)。FrameStructureforHS-DPCCH,Rec.25.211§HS-DPCCH10bits/slot第二十五頁(yè)，共三十一頁(yè)。HS-DPCCH,ChannelCodingofHARQ-ACKRec.25.212§4.7.1