graph+based+algorithms+for+topology+control+in+wireless+sensor+network

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1、Abstractlnrecentyears，graphalgorithmshaveemergedasapo、verfultechniquefortopologycontrolandasasolutiontovariousproblemsrelatedtowirelesssensornetworks·Thegoalofthisthesisistoapplygraphalgorithmstosatisfytop0109vcontrolconstraintsinwirelesssensornetworks．ThisthesisproVidesatechnicalandth

2、eoreticaltechniquewhichgreatlvreducesoVerheadsandtimecomplexityoftopologycontrolalgorithmwithrespecttoothera5pectsKquiredinWSNs·Ourresultcouldbealsousefulfordevelopingothertopologycontrolalgorithmsin3-dimensionsandmobileWSNs．Previouslysucllalgorithmsexplicitlyconstructedtopologycontrol

3、、、'ithmoreemphasisonenergvconsumptionwithoutpayanyattentiontotimecomplexitywhichisacriticalfactorforsmalldeviceswithlimitedcomputingcapabilities．WepresentaSimpleFault—TolerantLocalTopologyControl(SFL)algorithm．forreliablewirelessmulti—hopnetworks．thatisanimprovementovertheLTRTalgorithm

4、．whichgix7esatrade。offbetx、’eendifferenttopologycontroldesignfactorsrelatedto∥irelesssensornetw+orks。Ouralgorithmencompassesalltheconstraintsjsuchas：distributedaIgorithm．10calinformation，locationinformationjk—Connectivity，coverage，smallnodedegree，linkbi-directionality，simplicity，lowmes

5、sagecomplexity，energy．efficiency，spanner．convergencetime，andmemoryconsumption．InSFL，eachnodebuildsitslocalSFLindependentlybyapplyingLMSTktimestOachievek。edgeconnectivityandtooptimizeitstransmissionpowerbymaintainingnetv～’orkconnectix7ityinalocalizedmanner．Wediscussseveralsmoothnessterm

6、sthatwecanbeemployed．ExperimentalresultsshowthatSFLhasbetterperformancethanLTRTintermoflowmessagecomplexity．Thelastchapterofthethesisaddressestheissueoftheefficiencvinnetworkdesignfork’vertexconnectivityproblem．Wecomparetherunningtimesofseveralstandardmin‘cut／max-flowalgorithms．Wealsob

7、enchmarkthesealgorithmsonastandardnumberoft>7picalgraphs．Inmostcasespseudo—flowalgorithmworksseveraltimesfasterthantheothersKeywords：netx、’orkdesignproblem；graphalgorithms；minimumcut；maximumflow：reliability；k—vertexconnectivitvIII一t．。’‘‘《摘要近年来，图算法(graphalgorithms)已成为强大的技术用拓扑控制中以解决在无线