无线AdHoc网络中的跨层QoS保证研究

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1、华中科技大学博士学位论文无线AdHoc网络中的跨层QoS保证研究姓名：阮加勇申请学位级别：博士专业：通信与信息系统指导教师：黄本雄20050401AbstractWithrapiddevelopmentandcommercializationofcurrentInternetmultimediabusinesssuchasVoIP,videomeetingetcandpersonalcommunicationsystembecomingbroadband,theapplicationenvironmentofwireless

2、AdHocnetworkgraduallyextendsfromoriginalmilitaryapplicationtomorecivilfields.However,theconnaturalcharacteristicsofwirelesschannelsandthemobilityofnodes,multi-hopspacesmultiplexingmethodsandself-organizingcharacteristicmakesupportingQoSinwirelessAdhocnetworkfacemuc

3、hmorenewchallenges.Thus,researchofQoSinwirelessAdHocnetworkhasveryimportantpracticalmeaningandapplicablevalue.ThispaperstartsfromtheresearchesofQoSarchitectureQoSsignalingdifferentcontrollingstrategieswhichsupportsoperationdifferentiationandresourceconservationandp

4、ointsoutthatQoScontrollingstrategiesofdifferentlayersareindependentfromeachother,partoptimizationandredundancyofmultilayerrepetitionsimilaritycontrollingstrategylimitstheperformanceofwirelessself-organizednetwork..Itpointsoutthatvagueboundarybetweenlayersandcross-l

5、ayerdesignwouldbethetrendofdevelopmentofwirelessnetwork.ResearchofQoSshouldbreakthroughtheindependencebetweenlayersoftraditionalOSIarchitectureandimprovethewholeperformancebyjointoptimizationthroughtransmittingcontrollingmessageincross-layerarchitecture.Italsoprovi

6、despracticablecross-layerQoSmodel.ThispaperdigsintobasicmediaaccesscontrolprotocolDCFandEDCFinIEEE802.11and802.11e,andadvancescomputingmethodofaveragebackoffwindowandtheoryanalyticalmethodofaccessdelayforDCFandEDCF.Anditvalidatesthevalidityofcomputingmethodthroughs

7、imulation,andthereforeprovidestheorybasisforresearchesofreal-timetransmittingoperationsinwirelessLAN.Thispaperrestrictsdelaythroughcross-layerdesign.Thecross-layerdatachannelmodelitadvancescombinescross-layerprotocoldesignandDiffServarchitecture,appliesDCS-PDDcross

8、-layerschedulingarithmeticincross-layerQoSmappingmodelandadmittingcontrollingmodel.Andinlinklayerthroughusingschedulingarithmeticbasedondelayfeed