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1、南開大學碩士學位論文基于簇內(nèi)中轉(zhuǎn)鏈路的新型低功耗LEACH算法姓名:馬艷申請學位級別:碩士專業(yè):通信與信息系統(tǒng)指導教師:李維祥20090601摘要摘要無線傳感器網(wǎng)絡是由部署在檢測區(qū)域內(nèi)大量的微型傳感器節(jié)點通過無線通信形式組成的一個多跳自組織網(wǎng)絡系統(tǒng)。其目的是協(xié)作感知、采集和處理網(wǎng)絡覆蓋區(qū)域里被檢測對象的信息,并發(fā)送給觀測者?。無線傳感器網(wǎng)絡通常用于人類無法或因某種原因不能進入的區(qū)域內(nèi)檢測周圍環(huán)境的各種變量,其應用范圍越來越廣泛,其研究已經(jīng)成為無線網(wǎng)絡領域的重要課題。無線傳感器網(wǎng)絡有其自身的特點:節(jié)點能量有限,節(jié)能性能要求高,以數(shù)據(jù)為中心,需要在本地進行信息融合。因此,針對無線傳感器網(wǎng)絡的特
2、點和用途,開發(fā)專用的路由通信協(xié)議已經(jīng)成為當前無線傳感器網(wǎng)絡領域亟待研究的課題。本文主要介紹了低功耗自適應集簇分層型協(xié)議Leach協(xié)議,指出協(xié)議本身存在的相應問題,并在此協(xié)議的基礎上提出了一種新的節(jié)能路由協(xié)議N.Leach,并使用OMNet++平臺進行新算法的仿真,比較和分析了兩種算法的優(yōu)劣。結(jié)果顯示,N—leach協(xié)議通過建立數(shù)據(jù)中轉(zhuǎn)鏈路,采用數(shù)據(jù)融合技術(shù),優(yōu)化了平均傳輸距離,均衡了簇首的工作量,因而節(jié)省了網(wǎng)絡消耗能量,從而延長了整個網(wǎng)絡的壽命。關(guān)鍵詞:無線傳感器網(wǎng)絡Leach中轉(zhuǎn)鏈路OMNet++AbstractWirelesssensornetworkisamulti—hopself-
3、organizednetworksystemcomposedofmanymicro—sensornodeswhicharedeployedintheregionDetectthroughformsofwirelesscommunications.Theaimisperceivedcollaboration,collectionanddealingwiththeobjectinformationthatdetectedinthenetworkcoverageareaandsendobservers.Wirelesssensornetworksareusuallyusedforsomedete
4、ctionregionsthathumanscallnotorforsomereasonCannotentertodetectvarioussurroundingenvironmentvariables,andithasincreasinglywiderangeofapplications,itsresearchareasofwirelessnetworkshasbecomeanimportanttopic.Wirelesssensornetworkhasitsowncharacteristics:limitednodeenergy,energy·savingperformancerequ
5、irements,hi曲data—centric,theneedforintegrationoflocalinformation.Therefore,forwirelesssensornetworkcharacteristicsanduses,thedevelopmentofadedicatedroutingcommunicationprotocolhasbecomethefieldneedtOstudyinwirelesssensornetworks.Thispapermainlyintroduceslow—poweradaptivestratifiedclusterprotocol‘L
6、each’,pointsoutthecorrespondingexistenceproblemshadbyitself,andputforwardanewenergy-efficientroutingprotocol‘N—Leach’onthebasisofprotocol‘Leach’,andsimulatesthenewalgorithmusingOMNet++platformandtakescomparisonandanalysisofthemeritsoftwoalgorithms,resultsshowthat,N.1eachprotocoloptimizestheaverage
7、transmissiondistancethroughtheestablishmentofdatatransferlinkandtheapplicationofdatafusiontechnology,balancetheworkloadofthecluster,thussavingthenetworkenergyconsumption,prolongingthelifespanoftheentirenetwork.Ke