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ID:32369863
大小:6.71 MB
页数:61页
时间:2019-02-03
《一种有利位置优先wsns群首选择机制地研究》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、万方数据Abs仃actWirelesssensornetworksconsistofhundredssensornodes.Hierarchicalclustering,since21century,playsaremarkableroleinfieldssuchasmachinelifespanmonitor,healthcaremonitor,battlefieldmonitor,andwiseirrigation,enablingtheintellectualizationandautomatio
2、nofourdailylife.LEACHprotocolservesasthebenchmarkofhierarchicalclustering.Thesedays,researchersfromeverywalkimproveitinvariousaspects,presentingSEP,DEEC,PSCNDprotocolsasimprovededitions.Nevertheless,protocolsabovearebomwithrespectivedrawbacks.LEACHignore
3、stherationalityofclusterheaddistribution.SEPmerelydifferentiatestheclusterheadprobabilityintotwocategories,neglectingdetailedconcentrationonresidualenergyandsensorlocation.DEECoverlooksnodepositioninformationandterminatesnetworkoperationprematurely.FLPso
4、lutionsquanderstoomuchtimeonclusterheadselection,whileLEACH—CandPSCNDarenotcompetentforconsideringdata—transmittingenergydissipationfromclusterheadtobasestation.Thjspaperstrivestohedgedrawbacksofaboveprotocolsandcombinetheiradvantages.proposingareasonabl
5、eclusterheadselectionmechanism.Threemajorrevisedpointshavebeenlistedasfollows:1.TimelyupdatetheGvalueofclusterheadcandidates.T11isensuresthatthereareatleastoptimalnumberclusterheadcandidatesineachround,eliminatingthescenariothatnoclusterheademergesduring
6、somespecificrounds.2.Offeramoreaccuratevalueintermsofaverageresidualenergy.Then,thevaluegeneratesamorepreciseclusterheadprobability.Bytheway,thisguaranteesthatWSNscouldoperatetillthelastnodedies.3.Payattentiontodistanceamongclusterheadsaswellasdistancefr
7、omthewould—beclusterheadtothebasestationwhenjudgingthereasonabilityofclusterheadposition.Myapproach,whilepunishinganodeindisadvantageposition,makesmucheasieranodeinfavorablelocationtoserveasclusterhead.Tllispaperpursuesasub—optimalsolutionforclusterheadl
8、ocationdetermination.featuringrelativelylowtimecost.Theexperimentrevealsthatmyprotocolachievesanaggressivegoalonextendingnetworklifespan(notablystableperiod)aswellasslashingweaksensingperiod.Keywords:Stableperiod,Threshold
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