移动通信与仿真5-HSDPA-FDD.ppt

吴伟民电子与信息工程系wuwm 视频会议系统 Overview ProtocolStack MACLayerEvolution TransportChannel PhysicalChannels Evolution HSDPA TerminalCapabilityClasses TimingStructures HSDPAstandsforHighSpeedDownlinkPacketData Release5featureof3GPP UTRAN amajorupgradeto3Gsystemcapabilities HSDPAshortensround triptimebetweennetworkandterminals HSDPAreducesvarianceindownlinktransmissiondelay HSDPAdoesnotimproveuplinkdatarates seee DCHcalledHSUPA HSDPAusesDCHtransportchannel Optimizedforhigh speeddownlinkdata onlySF 16codesused Shorterframes 2msincluding3Timeslots enablesfasterreactionstochangingchannelconditions AMC enablesfasterretransmissionprotocol HARQ AdaptativeModulationandCoding AMC adaptsthefollowingtransmissionformatattributes modulationscheme QPSK 16QAM numberofphysicalchannel redundancyversion errorcorrectionrate TheUEmeasuresthechannelconditions andindicatestoNode Bthehighestdatarate AMC itcouldsupportthroughCQIindication FastschedulingperformedbytheNodeB TheHARQprotocolimplementsafastacknowledgeddatatransmissionscheme retransmissionsincludingtheoriginalinformationbits butthedatapacketcontainsmoreredundancy Stop And WaitARQschemeisusedinHSDPA NHARQProcesses eachStop And WaitARQ UE2 UE3 UE1 MultiplexingSpreadingCodeforoneUEimposedbycapabilityclass Usersaremulitplexedbothintime Codes Time HS DSCH relatedSharedControlChannel HS SCCH HS DSCH HighSpeedPhysicalDownlinkSharedChannel HS PDSCH DedicatedPhysicalControlChannel uplink forHS DSCH HS DPCCH UESide MAC hsisresponsiblefor HARQ ACK HybridAutomaticRepeatRequest Re ordering NodeBSide MAC hsisresponsiblefor FlowControl Scheduling PriorityHandling HARQ TFRI MAC d MAC hs PHY MAC hs PHY L1 L2 HS DSCHFP L1 L2 HS DSCHFP MAC d UE NodeB RNC NodeB Scheduler Rec25 321 11 6 1 SchedulesallUEswithinacell Servicespriorityqueues TheschedulerschedulesMAC hsSDUsbasedoninformationfromupperlayers OneUEmaybeassociatedwithoneormoreMAC dflows EachMAC dflowcontainsHS DSCHMAC dPDUsforoneormorepriorityqueues DeterminestheHARQEntityandthequeuetobeserved SetstheTSNfornewdatablocksbeingtransferredfromtheselectedqueue SettheTSNtovalue0forthefirstMAC hsPDUtransmittedforeachQueueIDwithinanHS DSCHIncrementtheTSNwithinoneforeachtransmittedMAC hsPDUoneachQueueIDwithinanHS DSCH Schedulenewtransmissionsandretransmission basedonthestatusreportsfromHARQProcesses Determinestheredundancyversion foreachtransmittedandretransmittedMAC hsPDU NodeB HARQEntity Rec25 321 11 6 2 ThereisoneHARQentityforeachUe TheHARQentitysetstheQueueIDintransmittedMAC hsPDUtovalueindicatedbyscheduler TheHARQentitysetsthetransmissionsequencenumber TSN intransmittedMAC hsPDUtovalueindicatedbyscheduler NodeB HARQProcess Rec25 321 11 6 3 TheHARQprocesssetstheNewDataIndicatorintransmittedMAC hsPDU tothevalue 0 forfirstMAC hsPDUtransmittedbyaHARQProcess notincrementforretransmissionofaMAC hsPDU incrementwithoneforeachtransmittedMAC hsPDUcontainingnewdata TheHARQprocessprocessesreceivedstatusmessagetothescheduler MAC dforUEn MAC dforUE2 HARQEntity UE3 HARQEntity UE2 SCHEDULER QueueID0TSN3NewDataInd NodeBSide MAC dforUE1 QueueID1TSN3NewDataInd ReorderingEntity UESide HARQEntity UE1 HARQProcess rec25 321 11 6 2 2 IftheMAC hsPDUisreceivedwithin5sub framesfromthereceptionofthepreviousMAC hsPDUintendedforthisHARQprocess MAC hdPDUisdiscarded MAC dforUE1 UESideMACArchitecture Rec 25 321 4 2 3 UTRANSideMACArchitecture Rec 25 321 4 2 4 MAC hsSDU MAC hsSDU MAC hsSDU Padding PDCP TCP IPCompressed AMRBlockVoice MAC hsHeader MAC dPDUSize 336bits MAC dPDUSize 336bits MAC dPDUSize 144bits MAC hsPDU UE1Data MAC hsPayload MAC hsHeader Rec 25 321 9 2 2 VF QueueID TSN SID1 N1 F1 SID2 N2 F2 VF 1bit VersionFlag extensioncapabilities0 Normal1 reservedQueueID 3bits indicationforreorderingqueueinthereceiver setbyHARQEntityTSN 6bits TransmissionSequenceNumber usedforreorderingpurposestosupportin sequencedeliveryhigherlayers NumberofSequencebyQueueIDSID 3bits SizeIndexIdentifier indexcorrespondingtoMAC dsizeofasetofconsecutiveMAC dPDUsSeein25 331 10 3 5 1a MAC dPDUsizeInfo N 7bits SizeNumberofconsecutiveMAC dPDUswithsameIndexSetMaxnumberPDUsperTTIinFDD 70F 1bit FlagindicatingifmorefieldsarepresentintheMAC hsHeader SIDk Nk Fk HS DSCH High SpeedDownlinkSharedChannel Rec 25 212 4 5 Slot0 Slot1 Slot2 2ms OnetransportblockonceeveryTTI 2ms associatedwithoneDCH HybridARQforHS DSCH Rec 25 212 4 5 4 ThehybridARQfunctionalitymatchesthenumberofbitsattheoutputofthechannelcodertothetotalnumberofbitsoftheHS PDSCHsettowhichtheHS DSCHismapped ThehybridARQfunctionalityiscontrolledbytheredundancyversion RV parameters TheexactsetofbitsattheoutputofthehybridARQfunctionalitydependsonthenumberofinputbits thenumberofoutputbits andtheRVparameters ThehybridARQfunctionalityconsistsoftworate matchingstagesandavirtualbuffer HS DSCHhybridARQfunctionality HS PDSCH HighSpeed PhysicalDownlinkSharedChannelRec 25 211 5 3 3 13 Codes Time ONLYONEblockHS DSCH HS PDSCHs k 4M 2forQPSK 320bits slotM 4for16QAM 640bits slot slot 0 slot 1 slot 2 SizeofTransportBlock TFRI HS SCCH HighSpeed SharedControlChannelRec 25 211 5 3 3 12 TheHS SCCHisafixedrate 60kbps SF 128 downlinkphysicalchannelusedtocarrydownlinksignallingrelatedtoHS DSCHtransmission CodingforHS SCCH Rec 25 212 4 6 HS SCCHPart1 HS SCCHPart2 SlotarealignedtimewiththeCPICHRate1 3convolutioncodingQPSKmodulationUpto4HS SCCHsperUE see25 214 6A 1 1 Slot 1 Slot 2 HS SCCH 7680chips Slot 0 CodingforHS SCCH Rec 25 212 4 6 UEidentity 16bits xue 1 xue 2 xue 16UEidentityistheHS DSCHRadioNetworkIdentifier H RNTIsetsinRadioBearerSetupmessage see25 331 8 6 3 1b Channelization code setinformation 7bits xccs 1 xccs 2 xccs 7P multi codesstartingatcodeOxccs 1 xccs 2 xccs 3 min P 1 15 P xccs 4 xccs 5 xccs 6 xccs 7 O 1 P 8 15 HS PDSCHs slot 0 slot 1 slot 2 Modulationschemeinformation 1bit xms 1 Redundancyandconstellationversion 3bits xrv 1 xrv 2 xrv 3ParametersofthesecondratematchingstageinHARQfunctionality seeRec25 212 4 5 4 3 Newdataindicator 1bit xnd 1Hybrid ARQprocessinformation 3bits xhap 1 xhap 2 xhap 3IdentifierprocesssentbyRRCinHARQInfo see25 331 10 3 5 7a NumberofProcesses Memorysize ProcessMemorysize MaximumnumberofsoftchannelbitsavailableinthevirtualIRbufferTransport blocksizeinformation 6bits xtbs 1 xtbs 2 xtbs 6TFRI TransportFormatResourceIndicator Rec25 321 9 2 3Letktbethesumofthetwovalues kt ki k0 i ThetransportblocksizeL kt canbeobtainedbyaccessingthepositionkt CodingforHS SCCH Rec 25 212 4 6 CodingforHS SCCH Rec 25 321 AnnexA HS DPCCH Rec 25 213 4 2 1 2 CodeAllocation Rec25 213 4 3 1 2 2 FrameStructureforHS DPCCH Rec 25 211 4 2 1 2 HS DPCCH10bits slot HS DPCCH Ch