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1、IEEETRANSACTIONSONVEHICULARTECHNOLOGY,VOL.58,NO.2,FEBRUARY2009843ADynamicProgrammingApproachforQoS-AwarePowerManagementinWirelessVideoSensorNetworksAfshinFallahi,StudentMember,IEEE,andEkramHossain,SeniorMember,IEEEAbstractLimitedbatterypoweratwirelessvideosensornodes,Thisi
2、snotefficientforsensornetworks,specificallythosewithalongwiththetransmissionqualityrequirementsforvideodata,burstytraffic,suchasvideotraffic.Inanotherapproach,sensorsmakesquality-of-service(QoS)provisioninginawirelessvideoinsleepmodearewokenupbyexternalmeans,ifneeded,bysensorn
3、etworkaverychallengingtask.Inthispaper,adynamicusingalow-powerwakeupradiodedicatedforthispurposepower-managementframeworkisproposedforawirelessvideosensornodetoimprovetheenergy-savingperformancewhile[5].Yetanotherapproachisthemodificationofthepower-satisfyingvideotransmissi
4、onqualityrequirements.Thisframe-savingfunctioninthemediumaccesscontrol(MAC)protocolworkisdevelopedbasedonaMarkovdecisionprocessthatcon-toreducetheenergyconsumptionasmuchaspossible[6].sidersthevideotrafficarrivalprocessinthesensornode,theDynamicvoltagescalingwasimplementedin
5、[7]tooptimizesleepandwakeupprocessesinthecameraandwirelesstransceiverenergyconsumptionformultimediaprocessinginvideosensorelectronics,thequeuestatus,andthewirelesschannelcondition.Adynamicprogrammingapproachisusedtofindtheoptimumnetworks.Ingeneral,apowermanagercanmonitorthe
6、power-policytoachievethedesiredperformancemeasuresinanenergy-consumingcomponentsinthesensornodeanddecidewhenalimitedsensornode.sensornodeshouldgotosleeporidlestateandtheamountIndexTermsDynamicprogramming,Markovdecisionprocessoftimetostayinthesestates.Thechoiceofthepolicyth
7、at(MDP),performanceanalysis,powermanagement,quality-of-minimizespowerconsumptionunderperformanceconstraintsservice(QoS)provisioning,wirelessvideosensornetworks.isaconstrainedoptimizationproblem.WhilethereexistasignificantamountofresearchresultsI.INTRODUCTIONonissuesrelatedt
8、odatagathering,routing,andMAC[4]inwirelesssensornetworks,QoSprovisioningformultime-NAwire
