无线传感器网络模型设计-英文文献翻译.doc

ModelDesignofWirelessSensorNetworkbasedonScale-FreeNetworkTheoryABSTRACTThekeyissueofresearchesonwirelesssensornetworksistobalancetheenergycostsacrossthewholenetworkandtoenhancetherobustnessinordertoextendthesurvivaltimeofthewholesensornetwork.Asaspecialcomplexnetworklimitedespeciallybytheenvironment,sensornetworkismuchdifferentfromthetraditionalcomplexnetworks,suchasInternetnetwork,ecologicalnetwork,socialnetworkandetc.Itisnecessarytointroduceawayofhowtostudywirelesssensornetworkbycomplexnetworktheoryandanalysismethods,thekeyofwhichliesinasuccessfulmodelingwhichisabletomakecomplexnetworktheoryandanalysismethodsmoresuitablefortheapplicationofwirelesssensornetworkinordertoachievetheoptimizationofsomecertainnetworkcharacteristicsofwirelesssensornetwork.Basedongenerationrulesoftraditionalscale-freenetworks,thispaperaddedseveralrestrictionstotheimprovedmodel.Thesimulationresultshowsthatimprovementsmadeinthispaperhavemadetheentirenetworkhaveabetterrobustnesstotherandomfailureandtheenergycostsaremorebalancedandreasonable.Thisimprovedmodelwhichisbasedonthecomplexnetworktheoryprovesmoreapplicabletotheresearchofwirelesssensornetwork.Key-words:Wirelesssensornetwork;Complexnetwork;Scale-freenetworkI.INTRODUCTIONInrecentyears,wirelesssensornetworkshaveattractedmoreandmorerelatedresearchersforitsadvantages.Sensornodesareusuallylow-powerandnon-rechargeable.Theintegrityoftheoriginalnetworkswillbedestroyedandothernodeswillhavemorebusinessburdenfordatatransmissioniftheenergyofsomecertainnodesdeplete.Thekeyissueofsensornetworkresearchistobalancetheenergyconsumptionofallsensornodesandtominimizetheimpactofrandomfailureofsensornodesorrandomattackstosensornodesontheentirenetwork[1].ComplexnetworktheoryhasbeenforsometimesincefirstproposedbyBarabasiandAlbertin1998,butcomplexnetworktheoryandanalysismethodappliedtowirelesssensornetworksresearchisseriouslyrareanddevelopsinslowprogress.Asaspecialcomplexnetworklimitedespeciallybytheenvironment,sensornetworkismuchdifferentfromthetraditionalcomplexnetwork,andtheexistingcomplexnetworktheoryandanalysismethodscannotbedirectlyappliedtoanalyzesensornetworks.Basedonscale-freenetworktheory(BAmodel)[2],(1)thispaperaddedarandomdamagemechanismtoeachsensornodewhendeployedinthegenerationrule;(2)consideringtherealstatementofwirelesssensornetworks,aminimumandmaxinumrestrictiononsensorcommunicationradiuswasaddedtoeachsensornode;(3)inordertomaintainabalancedenergycomsuptionoftheentirenetwork,thispaperaddedalimiteddegreeofsaturationvaluetoeachsensornode.Thisimprovedscale-freemodelnotonlyhasthementionedimprovementsabove,butalsohaslotsofadvantagesoftraditionalscale-freenetworks,suchasthegoodabilitytoresistrandomattacks,sothattheexistingtheoryandanalysismethodsofcomplexnetworkwillbemoresuitablefortheresearchesofwirelesssensornetwork.II.PROGRESSOFRELATEDRESEARCHHailinZhuandHongLuohaveproposedtwocomplexnetworks-basedmodelsforwirelesssensornetworks[3],thefirstofwhichnamedEnergy-awareevolutionmodel(EAEM)canorganizethenetworksinanenergy-efficientway,andcanproducescale-freenetworkswhichcanimprovethenetworksrelianceagainstrandomfailureofthesensornodes.InthesecondmodelnamedEnergy-balancedevolutionmodel(EBEM),themaximumnumberoflinksforeachnodeisintroducedintothealgorithm,whichcanmakeenergyconsumptionmorebalancedthanthepreviousmodel(EAEM).CHENLijunandMAOYingchihaveproposedatopologycontrolofwirelesssensornetworksunderanaveragedegreeconstraint[4].Inthepreconditionofthetopologyconnectivityofwirelesssensornetworks,howtosolvethesparsenessofthenetworktopologyisaveryimportantprobleminalargenumberofsensornodesdeployedrandomly.Theyprovedtheirproposedschemecandecreaseworkingnodes,guaranteenetworktopologysparseness,predigestroutingcomplexityandprolongnetworksurvivalperiod.LEIMingandLIDeshihaveproposedaresearchonself-organizationreliabilityofwirelesssensornetwork[5],whichaimingonthetwosituations:deficiencyofWSNnodesandunderexternalattack,analyzestheerrortoleranceabilityofdifferenttopologiesofWSN,andeventuallyobtainsoptimizedself—organizedtopologicalmodelsofWSNandproposesarefinedroutingalgorithmbasedonWSN.III.IMPROVEDSCALE-FREEMODELFORWSNBecauseofthelimitedenergyandtheevilapplicationenvironment,wirelesssensornetworksmayeasilycollapsewhensomecertainsensornodesareofenergydepletionordestructionbythenature,andevensomesensornodeshavebeendamagedwhendeployed.Thereisalsoarestrictiononmaxinumandmininumcommunicationradiusofsensornodesratherthantheotherknownscale-freenetworkssuchasInternetnetwork,whichhasnorestrictiononcommunicationradius.Tohaveabalancedenergyconsumption,itisnecessarytosetupasaturationvaluelimiteddegreeofeachsensornode[6].Inresponsetothesepoints,basedonthetraditionalscale-freemodel,thispaperhasmadethefollowingimprovementsintheprocessofmodelestablishment:(1)Alargenumberofresearcheshaveshownthatmanycomplexnetworksinnaturearenotonlytheresultfrominternalforces,butalsotheresultfromexternalforceswhichshouldnotbeignoredtoformanentirecomplexnetwork.Nodefailuremaynotonlyoccourbynodeenergydepletionorrandomattackstothemwhensensornetwo