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时间:2020-03-24
《基于信念重用的WSNs能量高效跟踪.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、30传感器与微系统(TransducerandMicrosystemTechnologies)2012年第3l卷第8期基于信念重用的WSNs能量高效跟踪仵博,吴敏,郑红燕,冯延蓬(1.中南大学信息科学与工程学院,湖南长沙410083:2.先进控制与智能自动化湖南省工程实验室,湖南长沙410083:3.深圳职业技术学院教育技术与信息中心,广东深圳518055)摘要:针对无线传感器网络(WSNs)中目标跟踪性能与传感器能量消耗难以平衡问题,提出一种信念重用的WSNs能量高效跟踪算法。使用部分可观察马尔可夫决策过程(POMDPs)对动态不确定环境下的WSNs进行建模,将跟踪性能与能量消耗平
2、衡优化问题转化为POMDPs最优值函数求解过程;采用最大报酬值启发式查找方法获得跟踪性能的逼近最优值;采用信念重用方法避免重复获取信念,有效降低传感器通信带来的能量消耗。实验结果表明:信念重用算法能够有效优化跟踪性能与能量消耗之间的平衡,达到以较低的能量消耗获得较高跟踪性能的目的。关键词:无线传感器网络;能量高效跟踪;信念重用;部分可观察马尔可夫决策过程中图分类号:TP393;TP181文献标识码:A文章编号:1000-9787(2012)08-0030-04Energy·eficienttrackinginWSNsbasedonbeliefreusingWUBo,。WUMin,ZH
3、ENGHong—yan。FENGYan—peng。,,(1.SchoolofInformationScienceandEngineering,CentralSouthUniversity,Changsha410083,China;2.HunanEngineeringLaboratoryforAdvancedControlandIntelligentAutomation,Changsha410083,China;3.EducationTechnologyandInformationCenter,ShenzhenPolytechnic,Shenzhen518055,China)Abstr
4、act:Inordertosolvetheproblemofthetradeofbetweentargettrackingperformanceandsensorsenergyconsumptioninwirelesssensornetworks(WSNs),anovelalgorithmusingbeliefreusingforenergy—efficienttrackinginWSNsisproposed.WSNsismodeledunderdynamicuncertaintyenvironmentusingpartiallyobservableMarkovdecisionpro
5、cesses(POMDPs),andtheoptimizationofthetradeoffbetweentrackingperformanceandenergyconsumptionistransformedintosolvingtheoptimalfunctionvalueofPOMDPs.Themaximumrewardsheuristicsearchalgorithmisusedtoapproximatetheoptimalvaluewithrespecttotrackingperformance.Anovelapproachcalledthebeliefreusing(BR
6、)ispresentedtoavoidrepeatedlyacquiringbeliefstates,thisapproachcaneffectivelyreducesensorsenergyconsumptionduringcommunication.Theexperimentalresuhsshowthattheproposedalgorithmhasitseffectivenessinoptimizingthetradeofbetweentrackingperformanceandenergyconsumption,SOitcanmeettherequirementofhigh
7、trackingperformancewithlowenergyconsumption.Keywords:wirelesssensornetworks(WSNs);energy—eficienttracking;beliefreusing(BR);partiallyobservableMarkovdecisionprocesses(POMDPs)0引言感器能量消耗的冲突。因此,构建合理的节点调度算无线传感器网络(wirelesssensornetworks
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