基于dht的无线传感器网络路由协议分析

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1、ABSTRACTGreenhomeisoneoftheapplicationsofmodemagriculture，ituseswiredcommunicationinenvironmentalmonitoring．Althoughsignaltransmissioninwiredcommunicationisrelativelystable，complexwiringandhighercostsisnotgoodforfurtherenhanceinautomationandintelligenceofthegreenhouse．Forlarge-scalewirelesssensorn

2、etworksusedingreenhouse，flatroutingprotocolisclearlynotgoodfortheexpansionofthenetworkanduseofnoderesources，andhierarchicalroutingmethodisstillflawedinclusterheadselection、optimizationoftheclusterheadanddatatransmission,andnetworkswillconsumelargeamountsofenergyifcluster11eadiSselectedbyround．Thee

3、nergyofnodesinwirelesssensornetworksisverylimited．Hierarchicalroutingprotocolgreatlyimprovesthescalabilityoftheentiresystemandextendsthenetworklifetimebyassigningspecificworktotheclusterhead．Inthispaper,currentandcommonlyusedclusteredroutingalgorithmissummarized，andtheadvantagesanddisadvantagesoft

4、hesealgorithmsisalsoorganized；inclusteringprocess，theremainingenergyandrelativedensityofthenodearefullyconsidered，thenimprovedk-meansalgorithmisusedforoptimizationofclusteringresults；clusterheadCanpassdatatothebasestationinmulti—hopmannerthroughaggregationtree；itavoidsenergycostsinfrequentclusteri

5、ngbytheupdateofclusterheadintheprocessofdatatransmission；thispaperintroducesmoreefficientdatalookupsmanners、析ththeadvantagesofDHT．Inordertoverifytheperformanceofproposedalgorithm，thispaperdoessomesimulationexperimentsonPeerSimsimulationplatform，thenitiscompared谢mtheLEACHprotocol，LEACH-Dprotocoland

6、EquitableLEACH-Eprotocolthroughavarietyofscenesimulationtest．First，itsetsnetworksize嬲100m×lOOm，thenincreasethedensityofnodes，andfoundthatwhenthenumberofnodesisgreaterthan15，theproposedalgorithmcaileffectivelysaveenergyofnodesandextendthenetworklifetime，evenwhenthenetworkrunroundis200，theproposedal

7、gorithmstillhasbetterroutingperformance；Second，thenodedensityremainsthesame，thenitincreasesthesizeofthenetworkfrom100m×100m，theproposedalgorithmcalleffectivelysaveenergy．ofnodes、extendnetworklifetimeandreducetheI