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1、第1期电子学报Vol.40No.12012年1月ACTAELECTRONICASINICAJan.2012一种面向三维感知的无线多媒体传感器网络覆盖增强算法1,2,31,2,31,2,31肖甫,王汝传,孙力娟,翁娇艳(1.南京邮电大学计算机学院,江苏南京210003;2.江苏省无线传感网高技术研究重点实验室,江苏南京210003;3.宽带无线通信与传感网技术教育部重点实验室,江苏南京210003)摘要:覆盖作为无线传感器网络中的基础问题直接反映了网络感知服务质量.本文在分析现有无线多媒体传感器网络覆
2、盖增强算法的基础上,构建节点三维感知模型,提出面向三维感知的多媒体传感器网络覆盖增强算法(Three-DimensionalPerceptionBasedCoverage-EnhancingAlgorithm,TDPCA).该算法将节点主感知方向划分为仰俯角和偏向角,并根据节点自身位置及监测区域计算并调整各节点最佳仰俯角,在此基础上基于粒子群优化调整节点偏向角,从而有效减少节点感知重叠区及感知盲区,最终实现监测场景的区域覆盖增强.仿真实验表明:对比已有的覆盖增强算法,TDPCA可有效降低除节点感知重
3、叠区和盲区,最终实现网络的高效覆盖.关键词:无线多媒体传感器网络;三维感知模型;覆盖增强;粒子群优化中图分类号:TP393文献标识码:A文章编号:0372-2112(2012)01-0167-06电子学报URL:http://www.ejournal.org.cnDOI:10.3969/j.issn.0372-2112.2012.01.027Coverage-EnhancingAlgorithmforWirelessMult-iMediaSensorNetworksBasedonThree-Dime
4、nsionalPerception1,2,31,2,31,2,31XIAOFu,WANGRu-chuan,SUNL-ijuan,WENGJiao-yan(1.CollegeofComputer,NanjingUniversityofPostsandTelecommunications,Nanjing,Jiangsu210003,China;2.JiangsuHighTechnologyResearchKeyLaboratoryforWirelessSensorNetworks,Nanjing,Jia
5、ngsu210003,China;3.MinistryofEducationKeyLabofBroadbandWirelessCommunicationandSensorNetworkTechnology,Nanjing,Jiangsu210003,China)Abstract:Coverageisoneofthehotresearchtopicsinwirelesssensornetworks,whichindicatessensingQoSbywirelesssensornetworks.Mot
6、ivatedbytheexistingcoverage-enhancingalgorithmofwirelessmultimediasensornetwork,anewthreedimen-sionalsensorperceptionmodelisestablishedandacoverage-enhancingalgorithmbasedthismodel(TDPCA)isproposed.Thisa-lgorithmdividedthethree-dimensionalperceptionmod
7、elintopitchangleanddeviationangle,thusthebestoptimalpitchangleisca-lculatedaccordingthelocationofmonitoringareaandnodes,andthendeviationangleisoptimizedbasedonparticleswarmoptimiza-tion,whicheliminateoverlapandblindperceptionareaeffectively.Experimenta
8、lresultsshowthatcomparedwiththeexistingthree-dimensionalcover-enhancingalgorithminwirelesssensornetwork,sensationoverlapareaandblindspotsmaybeeliminatedbyTD-PCA,andthusultimatecoverageperformanceofthewirelesssensornetworkcanbeenhanced.K
