modeling in-network processing and aggregation in sensor networks

《modeling in-network processing and aggregation in sensor networks》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、1ModelingIn-NetworkProcessingandAggregationinSensorNetworksAjayMahimkarDepartmentofElectricalandComputerEngineeringTheUniversityofTexasatAustin,TX78713,USAmahimkar@ece.utexas.eduAbstractTherapidadvancesinprocessor,memoryandradiotechnologyhaveenabledthedevelopmentofdistributednetworksofsens

2、ornodescapableofsensingandcommunicatingusingwirelessmedia.Thebasicoperationinasensornetworkisthesystematicgatheringandtransmissionofsenseddatatotheend-user.Thesevereenergyconstraintsandlimitedcomputingcapabilitiesofthesensorspresentmajorchallengestoitsdesign.Inthisproject,weaimtodevelopane

3、nergy-efficientalgorithmforin-networkprocessingandaggregationinasensornetwork.Wealsoproposetopresentamodelforasensornodeandcommunicationinasensornetwork.IndexTermsSensorNetworks,In-NetworkProcessing,DataAggregation,Energy-EfficientAlgorithms2I.INTRODUCTIONAsensornetworkcomprisesofalargenumbe

4、roflow-powerwirelesssensorsspreadacrossageo-graphicalareathatcanbeusedtomonitorandcontrolthephysicalenvironmentfromremotelocations.Eachsensornodeisbatterypoweredandequippedwithintegratedsensors,dataprocessingcapabilitiesandshort-rangeradiocommunications.Thereadingssensedbythesensorsarerout

5、edtotheenduserbyamulti-hopinfrastructurelessarchitecturethroughthebasestationasshowninFig.1.Potentialapplicationsofsensornetworksincludereal-timetrafficmonitoring,battlefieldsurveillance,nuclearattackdetection,wirelessmeterreadingservices,etc.EndSatelliteInternetWirelessLANsUsersNetworksBase

6、StationSensorNetworkSensorNodesFig.1.ArepresentativeSensorNetworkThebasicoperationinsensornetworksisthesystematicgatheringofsenseddatatobeeventuallydeliveredtothebasestation(referredtoasasink).Sincethesensornodesareenergy-constrained,communicationbetweenthebasestationandthesensorsmustbeene

7、rgy-efficient.Thekeychallengeinsuchanenvironmentisthedesignofcommunicationprotocolsthatmaximizethenetworklifetime.NetworkLifetimeisthetimeatwhichthefirstsensornodeinthenetworkdiesi.e.itcompletely3exhaustsitsbatteryresources.Datafusionoraggregationhasemergedasaus