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1、第28卷第l2期傳感技術(shù)學(xué)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(qiáng),李哲濤1,2,郭華,鐘益群(1.湘潭大學(xué)信息工程學(xué)院,湖南湘潭41l105;2.湖南省湘潭大學(xué)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(luò)的生命周期,但簇頭的選取并未考慮當(dāng)前節(jié)點剩余能量和節(jié)點分布情況,導(dǎo)致網(wǎng)絡(luò)能量消耗不平衡。改進(jìn)的簇頭選擇協(xié)議NCHS—Leach(Novel
7、ClusterHeadSelectingLeach)存在沒有考慮節(jié)點當(dāng)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(jìn)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(luò)生命周期。通過MATLAB工具軟件隨機(jī)建立的網(wǎng)絡(luò)拓?fù)淠MNPCHSLeach協(xié)議、Leach協(xié)議以及NCHS—Leach協(xié)議的運(yùn)行,其仿真結(jié)果表明該協(xié)議比NCHS—Leach協(xié)議延長網(wǎng)絡(luò)生命周期40~50%
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