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1、2009InternationalConferenceonAdvancedInformationNetworkingandApplicationsWorkshopsWirelessSensorNetworks:ASurveyVidyasagarPotdar,AtifSharif,ElizabethChangDigitalEcosystemsandBusinessIntelligenceInstitute,CurtinUniversityofTechnology,Perth,WesternAustraliav.potdar@curtin.edu.au,atif.sharif@postgrad.c
2、urtin.edu.aue.chang@curtin.edu.auAbstract:WirelessSensorNetworks(WSN),anelementofpervasivecomputing,arepresentlybeingusedonalargescaletomonitorreal-timeenvironmentalstatus.Howeverthesesensorsoperateunderextremeenergyconstraintsandaredesignedbykeepinganapplicationinmind.Designinganewwirelesssensornod
3、eisextremelychallengingtaskandinvolvesassessinganumberofdifferentparametersrequiredbythetargetapplication,whichincludesrange,antennatype,targettechnology,components,memory,storage,power,lifetime,security,computationalcapability,communicationtechnology,power,size,programminginterfaceandapplications.T
4、hispaperanalysescommercially(andFig.1WSNNetworkresearchprototypes)availablewirelesssensornodesWSNnodeiscomprisedoflow-powersensingbasedontheseparametersandoutlinesresearchdevices,embeddedprocessor,communicationdirectionsinthisarea.channelandpowermodule.Theembeddedprocessorisgenerallyusedforcollectin
5、gandKeywords:WirelessSensorNetwork(WSN),FPGA,processingthesignaldatatakenfromthesensors.sensornode,ActiveNode,CCU.Sensorelementproducesameasurableresponsetoachangeinthephysicalconditionliketemperature,1.Introductionhumidity,particulatematter(e.g.CO2)etc.ThewirelesscommunicationchannelprovidesaInthel
6、astfewyearswirelesssensornetworksmediumtotransfertheinformationextractedfrom(WSNs)havedrawntheattentionoftheresearchthesensornodetotheexteriorworldwhichmaybeacommunity,drivenbyawealthoftheoreticalandcomputernetworkandinter-nodecommunication[5].practicalchallenges[1].ThisprogressiveresearchinHowever,
7、WSNusingIEEE802.15.4WirelessWSNsexploredvariousnewapplicationsenabledbyPersonalAreaNetworkprotocol(WPAN)orlargerscalenetworksofsensornodescapableofBluetoothiscomplicatedandcostly[10,18].Usingsensingin
