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1、学术报告 WSNswithEnergyHarvesting ABriefIntroduction2012 09 13紫泉1897 QQ562687381 PART2 WSNsPoweredbybatteries WSNsPoweredbyenergyharvesters Energyislimited lifetimeisfinite Energycanbereplenished lifetimemaybeVerylong WSNswithEnergyHarvestingWSNswithEnergyReplenishmentWSNsPoweredbyAmbientEnergyHarvestin
2、g WSN HEAP RechargeableWSNs RenewableEnergyforWSNs Solar ThemostCommonandmatured Onlyusablewhenthereissufficientsunlightorartificiallight RenewableEnergyforWSNs Mechanical Generatedbymovementsofobjects Especiallyprominentinbridges roadsandrailtracks Vibrationsgeneratedbycontinuoustrafficonthestairca
3、seproduced30 Wfromthepiezoelectricgenerator sufficienttopowerthesensorandradiohardware RenewableEnergyforWSNs Thermal Currentisgeneratedwhenthereisatemperaturedifferencebetweentwojunctionsofaconductingmaterial Difference WSNsvs WSNs EH ThecharacteristicsoftheenergysourcesEnergystoragedevicesusedPowe
4、rmanagementfunctionalityofthenodesProtocolsTheapplications requirements ResearchinWSNswithEnergyHarvesting PowerManagement DataDeliverySchemes Topology Connectivity EnergyStorageTechnique PowerManagement Maximizethebenefitsofhavingtheextraharvestedenergy Informationaboutfutureenergyavailabilityisreq
5、uiredtomakeoptimaldecisions DataDeliverySchemes 1Schemesinvolveofsomeformofback offandretransmissionislikelytobenon optimal 2Cooperativetransmissionprotocolshasbeenanactivearea 3Incorporatetheenergyreplenishmentrateintothecostmetricwhencomputingroutes 4Maximizethenetworkthroughputmaybethemainconside
6、ration Cooperativetransmission SourceDirectmodeRelaymodeRelayOwn trafficModeRelaymode t t 1 t 1 EnergyHarvestingPonPoffEventGenerationQonQoff Topology Connectivity Networktopologyandconnectivitymaybealteredwhennodesgotosleeptochargeupthebattery ItisnecessarytofindtheoptimalparametersforasleepandwakeupstrategyTopologycontrolschemescanexploittransmissionpowercontroltoincreasetheprobabilityofsuccessfullydeliveringthedatatothenexthop Summary NodeCharacteristics
