3Two dimensional cross-layer optimization for packet transmission over fading channel .pdf

《3Two dimensional cross-layer optimization for packet transmission over fading channel .pdf》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、IEEETRANSACTIONSONWIRELESSCOMMUNICATIONS,VOL.7,NO.10,OCTOBER20083813TwoDimensionalCross-LayerOptimizationforPacketTransmissionoverFadingChannelXiaofengBai,StudentMember,IEEE,andAbdallahShami,Member,IEEEAbstract—Inthispaperasingle-input-single-outputwirelesswher

2、erun-timepoweradjustmentisnotavailable.2)Thisdatatransmissionsystemwithadaptivemodulationandcodingworkdevelopsananalyticalmodeloftheproposedalgorithmovercorrelatedfadingchannelisconsidered,whererun-timeforevaluatingvariousQoSperformancemetrics.3)Combinedpowerad

3、justmentisnotavailable.Higherlayerdatapacketswithpreviousresearch,thisworkproposesanewmethodforareenqueuedintoafinitesizebufferspacebeforebeingre-leasedintothetime-varyingwirelesschannel.Withoutfixingthecross-layerperformanceoptimization.4)Basedontheoptimalphysic

4、allayererrorprobability,theobjectiveistominimizethesolution,thisworkintroducesatractabledesignframeworkaveragejointpacketlossrateduetobotherroneoustransmissionthatgeneratesasetofsuboptimalschemeswithscalableandbufferoverflow.Twooptimizationtechniquesareincorpo-c

5、omplexity-optimalitytradeoff,forpracticalimplementation.ratedtoachievethebestsolution.ThefirstispolicydomainTherestofthispaperisorganizedasfollows.InSectionIIoptimizationthatformulatesthedatarateadaptationdesignasclassicalMarkovdecisionproblem.Thesecondischannel

6、webrieflyreviewsomerelatedresearchwork.InSectionIIIdomainoptimizationthatappropriatelypartitionsthechannelwegivethesystemmodelusedforthisstudy.ThemultiratevariationbasedonparticularfadingenvironmentandcarriedtransmissionschedulingisformulatedasaMarkovdecisiontra

7、fficpattern.ThederivedpolicydomainanalyticalmodelcanprobleminSectionIVandfurtheranalyzedinSectionV.preciselymapanypolicydesignintovariousQoSperformanceInSectionVIandVIIthetwo-dimensionaloptimizationmetricswithfinitebuffersetup.Wethenproposeatractablesuboptimizati

8、onframeworktoproducedifferenttwo-dimensionalandsuboptimizationdesignframeworksareexposited,respec-suboptimalsolutionswithscalablecomplexity-optimalitytradeofftively.Finally,