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ID:37386051
大小:2.63 MB
页数:109页
时间:2019-05-23
《无线AdHoc网络中的跨层QoS保证研究》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、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
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