6An MDP-Based Approach for Multipath Data Transmission over Wireless Networks .pdf

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1、ThisfulltextpaperwaspeerreviewedatthedirectionofIEEECommunicationsSocietysubjectmatterexpertsforpublicationintheICC2008proceedings.AnMDP-basedApproachforMultipathDataTransmissionoverWirelessNetworksVinhBuiandWeipingZhuAlessioBottaandAntonioPescape´TheUniversityofNewSouthWales,AustraliaU

2、niversityofNapoliFedericoII,Italy{v.bui,w.zhu}@adfa.edu.au{a.botta,pescape}@unina.itAbstractMaintainingperformanceandreliabilityinwirelessthemultipathdatatransmissionproblemasaMarkovDecisionnetworksisachallengingtaskduetothenatureofwire-Process(MDP)[21],apowerfulmathematicalframeworkfor

3、lesschannels.Multipathdatatransmissionhasbeenusedinmakingdecisionsincontrolenvironmentsexhibitingdynamicwiredscenariostoreducelatency,improvethroughput,and-behaviors,e.g.wiredandwirelessnetworks[1],[3].Third,wewhen/wherepossible-balancetheload.Inthispaper,weproposeanapproachformultipath

4、datatransmissionoverwirelessintroduceasimplepathstatemonitoringmechanism.Fourth,networks.WedemonstratethattheproblemunderstudycananalgorithmcalledOPI(On-linePolicyIteration),whichbeformulatedasaMarkovDecisionProcess(MDP)andwehasalowcomputationalcomplexity,isproposedtoselectproposeanalgo

5、rithmcalledOn-linePolicyIteration(OPI),totransmissionpathsontheflybyusingtheMPD.Fifth,throughsolvetheformulatedMDPinrealtime.Weverifiedtheproposedsimulationsandrealdata,weshowthefeasibilityofourapproachusingsimulationswithns-2anddatacollectedfromrealheterogeneouswired/wirelessnetworks.The

6、resultsindicateapproachaswellasitscapabilitytoobtainbetterperformancethatweimprovebothdelayandlosscharacteristicsofend-to-endthanclassicalapproachessuchasRoundRobinandJoin-the-wirelesscommunicationsoutperformingtheclassicalmulti-pathShortest-Queue.Also,wearguethatourapproachisgeneralsch

7、emesincludingRoundRobinandJointheShortestQueue.enoughtobeappliedforimprovingotherQoSmetricssuchasthethroughputorafunctionofmultipleQoSparameters.I.INTRODUCTIONAttemptstoimproveQoSinwirelessnetworksbymeansWirelessnetworksarenoisyandunreliablecommunicationofmultipathdatatransmiss