hdr air interface overview

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1、1x-EVHighDataRateSystem:AirInterfaceOverviewStanVitebskyAMPS/PCSSystemsEngineering973-581-6935svite@lucent.comFocusofThisPresentation1X-EVAirInterfaceOperationPreliminaryPerformanceResultsOutlineMotivationfor1X-EVCapabilitiesPerformanceFrameandChannelStructureOperation,Proc

2、eduresandFeaturesConclusionsMotivationfor1X-EVMaximizethroughputbyoptimizingairinterfaceforPacketData:RemoveVoiceQOSconstraints(lowdelay,targetFER~1-2%).NocarriersharingbetweenVoiceandDatausers.Exploitpacketnatureofdatatransmission(Variablerateassignment,Scheduling,ManagingC

3、o-channelInterference)LowcosttoServiceProviders:Co-locatedwithexistingIS-95cellsReusethesameanalog/RFdesignsandcomponentsIP-basedbackhaul(fromBStocontroller)Usestandardandoff-the-shelfhigherlayerprotocolsandhardware(TCP/IP,MobileIP,PPP,RouterstoconnecttoInternet)Derivativeof

4、cdmaOneReuseIS-95spectrumReuseIS-95concepts(RLsofthandoff,fastpowercontrol,accessprocedures,synchronization,variablespreadingetc.)dualmodeIS-95/1X-EVASIC1X-EVCapabilitiesAsymmetricserviceMaximumForwardLinkDataRate-2.4MbpsMaximumReverseLinkDataRate-153.6kbpsSinglesharedchanne

5、latconstanttransmitpowerwithfastbestservingsectorselectionanddynamicratecontrolonForwardlinkSofthandoffandfastdynamicpowerandratecontrolonReverseLinkOptimizeddynamicschedulingofpackettransmissionstomaximizeforwardlinkthroughputSingleSharedDownlinkwithFastRateAdaptation(Conc

6、ept)FastRateControlandOptimizedSchedulingFastRateControlandOptimizedScheduling(cont.)Datarateisassignedbasedonthesignalstrengthmeasuredatthemobile.Schedulingalgorithmtakesadvantageofmulti-userdiversitybyservingusersingoodconditionsanddelayingdataforusersinunfavorablecondit

7、ions.Thelatterareservedwhentheirconditionsimprove.Thisapproachmaximizesoverallsectorthroughput.Thisfeatureenables1X-EVtoachievesignificantlyhigherspectralefficiencythanitispossibleforvoiceandotherreal-timeservices.FastBestServingSectorSelectionForwardLinkDataRatesMulti-SlotT

8、ransmissionandEarlyTerminationReverseLinkDataRates1X-EVFrameAlignment1X-EV