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ID:36425678
大小:7.71 MB
页数:129页
时间:2019-05-10
《无线AdHoc网络节点移动技术研究》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、西安电子科技大学博士学位论文无线AdHoc网络节点移动技术研究姓名:公维宾申请学位级别:博士专业:通信与信息系统指导教师:常义林20090101摘要路、确定移动节点和节点移动四个步骤。在确定增补链路时,首先构造网络的分区最小生成树,它的边即为节点传输功率过大的增补链路。在确定移动节点时,PMST-P(PartitionMinimumSpanningTree—Partition)算法采用的是分区移动方法,而PMST-UV(PartitionMinimumSpanningTree.UncutVertices)算法则采用非割节点移
2、动的方法。考虑到网络连通性和节点移动公平性问题,节点移动采用直线、回溯和级联三种方式。对于-PMST-UV,给出了其分布式实现算法LMST_LIⅣ(LocalPartitionMinimumSpanningTree-LocalUncutVertices)。这些算法能够均衡节点的传输功率。经过简单的演变,PMST-P和PMST-UV算法还可以解决分区问题。关键词:无线AdHoe网络移动模型网络部署拓扑控制覆盖率Abstractiiill—————-—-_———-_-,,——-——_————-——————————————————
3、_——————————●——————_——————-———-————————————一一Inwirelessadhocnetworks,duetomobilityofnetworkandunreliabilityofnodesandlinks,manytechniquesmustbeadoptedtoensuenetworkperformance.Beforenetworkdeployment,criticalresources,configurationparametersandperformanceofmajornetw
4、orkprotocolsshouldbedeterminedinadvancethroughnetworksimulations,andthenodemobilitymodelisamongthemostimportantrelatedtechniques.Duringnetworkoperation,toimprovenetworkperformance,thenetworktopologycanbeadjustedandconstructeddynamically.Inthisthesis,wediscussnodemo
5、bilitytechniques,includingautonomousmobilityandcontrolledmobilitytechniques,fromthreeaspects:mobilitymodels,movementdeploymentandmovementtopologycontrol·Themaincontributionsofthisthesisareoutlined弱follows:1.Inordertostudyinfluencesofentrancesofaterrain,themobilitym
6、odelofRWP(RandomWayPoint)withentrances(RWPWE)isproposed.Inthismodel,oneormoreentranceslieintheterrain。Itisimperativeforanodetopassthroughacertainentrancewithacertainprobabilitywhenitentersorexitsfromtheterrain.ThemovementpatternofanodeinaterrainCanbedescribedbyRWPm
7、odel.TmsmodelisageneralizedformofRWrPmodelandCanbeutilizedinreal.worldenvironmentswithentrances.ThismodelprovidesatheoreticalandexperimentalbaSisforevaluationsofthenetworkperformanceinmobileadhocnetworks.2.Inordertostudyinfluencesofrealisticterrainsandtoovercomepro
8、blemsofinaccuracyterrainmodeling,badscalabilityandlargedeviationincurrentrelatedmobilitymodels,theTerrain.BasedMobilityModel(TBMM)isproposed,whic
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