一种有利位置优先wsns群首选择机制地研究

《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