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1、第28卷第l2期傳感技術(shù)學報Vol_28No．122015年12月CHINESEJOURNALOFSENSORSANDACTUATORSDec．2015AnOptimalClusteringSelectionStrategyStudyontheWeightedNCHS—LeachProtocolⅣGLingfiao，，PENGZhiqiang一，LIZhetao一，GUOHua一，ZHONGYiqun，(1．SchoolofInformationEngineering，XiangtanUniversity．XiangtanHu’nan411105，China2．K
2、eyLaboratoryoflntelligentComputing&InformationProcessingofMinistryofEducation．XiangtanUniversity．Hu’nan411105，China)Abstract：TheLeachprotocolhasbeenproposedtomuchextendthelifecycleofthenetwork，buttheselectionofclusterheadshasnotconsideredthepresentresidualenergyofnodesandnodesdistribu
3、tion。whichleadstounba1．a(chǎn)ncedenergyconsumptionofthenetwork．ItsimprovedNCHS-Leachprotocolhasexistseveralproblems，suchasitdoesnotconsiderthenumberofanodebeingelectedclusterheadnodeandthedistancefromthebasestationtoclus．terheadnode．Accordingly，thispaperproposesanimprovedprotocol，theNPCHS—
4、Leachprotocol，whichcomprehen—sivelyconsidersnodes’residualenergy，thedistancefromthebasestationtotheclusterheadnode，thenumberofanodebeingaclusterheadand】istendensitytooptimizetheselectionstrategyofclusterheadnodetoextendthenet．worklifecyclewhileselectingtheclusterheadnodes．Throughanetw
5、orktopologyestablishedrandomlybyMATLABsimulatestheoperationofNPCHS—Leachprotoco1．LeachprotocolandNCHS-Leachprotoco1．thesimulationresultsshowthatNPCHS—Leachprotoco1canextend40—50％ofthenetworklifecyclemorethanNCHS—Leachprotoco1．Keywords：wirelesssensornetworks；lowenergyconsumption；weight
6、s；clustering；leachprotocolEEACC：6150P；7230doi：10．39690．issn．1004—1699．2015．12．020基于權(quán)重的NPCHS．Leach協(xié)議簇頭選取策略優(yōu)化研究王靈矯，彭志強，李哲濤1,2，郭華，鐘益群(1．湘潭大學信息工程學院，湖南湘潭41l105；2．湖南省湘潭大學智能計算與信息處理教育部重點實驗室，湖南湘潭411105)摘要：Leach協(xié)議的提出很大程度上延長了網(wǎng)絡的生命周期，但簇頭的選取并未考慮當前節(jié)點剩余能量和節(jié)點分布情況，導致網(wǎng)絡能量消耗不平衡。改進的簇頭選擇協(xié)議NCHS—Leach(Novel
7、ClusterHeadSelectingLeach)存在沒有考慮節(jié)點當選簇頭次數(shù)以及節(jié)點距離基站的距離等問題。據(jù)此，該文提出了改進協(xié)議一基于權(quán)值的簇頭選取NPCHS—Leach(NovelPowerClus—terHeadSelectingLeach)協(xié)議，在選取簇頭節(jié)點時綜合考慮節(jié)點的剩余能量、距離、節(jié)點成為簇頭的次數(shù)以及偵聽密度，優(yōu)化簇頭節(jié)點選取策略延長網(wǎng)絡生命周期。通過MATLAB工具軟件隨機建立的網(wǎng)絡拓撲模擬NPCHSLeach協(xié)議、Leach協(xié)議以及NCHS—Leach協(xié)議的運行，其仿真結(jié)果表明該協(xié)議比NCHS—Leach協(xié)議延長網(wǎng)絡生命周期40～50％
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