基于最優(yōu)連通功率的無線傳感器網(wǎng)絡(luò)穩(wěn)定成簇算法

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1、第3期李方敏等：基于最優(yōu)連通功率的無線傳感器網(wǎng)絡(luò)穩(wěn)定成簇算法·83·基于最優(yōu)連通功率的無線傳感器網(wǎng)絡(luò)穩(wěn)定成簇算法李方敏1，劉新華1，曠海蘭1,2，方藝霖1(1.武漢理工大學(xué)信息工程學(xué)院，湖北武漢430070；2.衡陽師范學(xué)院計(jì)算機(jī)系，湖南衡陽421008)摘要：針對節(jié)點(diǎn)實(shí)際部署中網(wǎng)絡(luò)易割裂及熱點(diǎn)區(qū)域節(jié)點(diǎn)密集、競爭激烈的情況，提出了一種基于最優(yōu)連通功率的無線傳感器網(wǎng)絡(luò)穩(wěn)定成簇算法。算法基于最優(yōu)鄰居節(jié)點(diǎn)數(shù)，利用可變功率調(diào)制技術(shù)，有效提高了網(wǎng)絡(luò)的信道利用率和網(wǎng)絡(luò)吞吐量，實(shí)現(xiàn)了分簇網(wǎng)絡(luò)的穩(wěn)定連通和穩(wěn)定成簇，簡化了

2、網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu)，最大限度地延長了網(wǎng)絡(luò)生命周期。實(shí)驗(yàn)仿真結(jié)果表明，算法有效維持了網(wǎng)絡(luò)的連通性和穩(wěn)定性，具有較強(qiáng)的自適應(yīng)能力，在提升網(wǎng)絡(luò)的整體性能上作用明顯。關(guān)鍵詞：無線傳感器網(wǎng)絡(luò)；功率控制；最優(yōu)鄰居數(shù)；穩(wěn)定成簇中圖分類號：TP393文獻(xiàn)標(biāo)識碼：A文章編號：1000-436X(2009)03-0075-09ResearchonastableclusteringalgorithmbasedontheoptimalconnectivitypowerforwirelesssensornetworksLIFang-mi

3、n1,LIUXin-hua1,KUANGHai-lan1,2,FANGYi-lin1(1.SchoolofInformationEngineering,WuhanUniversityofTechnology,Wuhan430070,China;2.ComputerDepartmentofHengyangNormalUniversity,Hengyang421008,China)Abstract:Inrealisticenvironment,theactuallayoutofnodesiseasytomak

4、enetworkseparatedandnodesarealwaysdenselydeployedinhotspotslikethesiteofanaccidentordisasterwherethecompetitionintensewasveryhigh.Astableclusteringalgorithmbasedontheoptimalconnectivitypowerforwirelesssensornetworkswasproposed.Thealgorithmmakesuseofthealt

5、erablepowercontroltechnologytoraisethechannelutilizationratioandnetworkthroughputbasedontheoptimalnumberofneighbors,andrealizesthestableconnectivityandclusteringofnetwork.Thealgorithmsimplifiesthetopologyofnetworksothatprolongthenetworklifetimeatthebest.T

6、hesimulationresultsshowthatthealgorithmmaintainstheconnectivityandstabilityofnetworkeffectively,andhasgoodauto-adaptedabilitytoenvironmentandobviouseffectsinthepromotionofwholeperformanceofnetwork.Keywords:wirelesssensornetworks;powercontrol;optimalnumber

7、ofneighbors;stableclustering第3期李方敏等：基于最優(yōu)連通功率的無線傳感器網(wǎng)絡(luò)穩(wěn)定成簇算法·83·1引言收稿日期：2008-06-21；修回日期：2008-11-15基金項(xiàng)目：國家自然科學(xué)基金資助項(xiàng)目（60773212）；教育部重點(diǎn)基金資助項(xiàng)目（107130）；湖北省重點(diǎn)國際科技合作基金資助項(xiàng)目（2007CA009）；湖北省自然科學(xué)基金資助項(xiàng)目（2008CDB337）FoundationItems:TheNationalNaturalScienceFoundationofChin

8、a(60773212);TheKeyProjectofMinistryofEducation(107130);TheKeyProjectofInternationalCooperationandExchangesofHubeiProvince(2007CA009);TheNaturalScienceFoundationofHubeiProvince(2008CDB337)在能量有限條件下通過降低能耗來延長網(wǎng)絡(luò)生存時(shí)間是無線傳感