无线自组织网络的网络层技术研究

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1、北京邮电大学博士学位论文无线自组织网络的网络层技术研究姓名：陈灿峰申请学位级别：博士专业：信号与信息处理指导教师：吴伟陵20050218!!塞坚皇查堂竖圭堡苎垒堕塑竺AbstractTherapiddevelopmentofwirelesscommunicationsandcomputernetworkshasboostedwirelessIntemetdevelopment．ComparedwithtraditionalwirelessaccessnetworksthatiSbaseduponthecellu

2、lararchitecture．wirelessedhocnetworksCalloperateinaself-organizedfashionwithoutanyestablishedinfrastructure．InnextgenerationwirelessIntemet，itisbelievedthatwirelessadhocnetworkswillplayanimportantroleinsuchfieldsaswirelesspersonalareanetworks(WPAN)，neighbora

3、reanetworks(NAN)，wirelessmeshnetworksandwirelesssensornetworks(WSN)．Thethesishasmainlydiscussedthefollowingnetwork-layertechniquesandprotocolsinwirelessadhocnetworks：(1)．Baseduponthemodelinganalysisofmultipathroutinginadhocnetworks，aframeworktoestimatetheopt

4、imalloadbalancing，minimumend·to—enddelayandrouterobustnessinwirelessadhocnetworkshasbeenproposed．IEEE802．11basedsimulationresultshaveverifiedtheeffectivenessofdispersityandredundantmultipathrouting．(2)．Thenodaltransmissionrangeboundshavebeenderivedforconnect

5、ivityguaranteeinhomogeneouswirelessadhocnetworks，andthemethodofintroducingmulti—radiointoheterogeneousadhocnetworksinordertoenhancetheconnectivityhasbeenproposedaswell．ThesimulationoftopologyconstructioninIEEE802．15_3abasedW涨hasverifiedtheeffectivenessofappl

6、yingmulti—radioinaidingtoeliminate‘‘dumbdevice’’phenomenonandenhancenetworkconnectivity．(3)．AfteranalysizingtheTCPperformanceinwirelessadhocnetworks，thecross—layerdesignmethodthatisbaseduponadaptivemodulationanderror—correcting(ARQandFEC)inlinklayeranddisper

7、sityroutinginnetworklayerhasbeenproposed．TCPperformanceovermultipathroutinghasbeenanalyzedaswell．(4)．Basedupontheanalysisoflocationestimationandlocationbasedroutinginadhocnetworks，all—directionanddirectionallocafionareapredictionmethodshavebeenproposed．Self-

8、organizedcellstructureanddynamiclocationmanagementindistributedwirelesscommunicationsystemhavebeenproposedaswell．KeyWords：WirelessAdHocNetworks，MultipathRouting，LoadBalancing，Multi-Radio，Topolog