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时间:2020-03-27
《物联网感知层非周期动态簇维护方法.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、第25卷第12期传感技术学报V01.25No.122012年12月CHINESEJOURNALOFSENSORSANDACTUATORSDec.20l2Non-PeriodicandDynamicClustersMaintainingMethodforSensingLayeroftheInternetofThingsHUXiangdongH,SHANGKeL,WEIQinfang(1.CollegeofAutomation,ChongqingUniversityofPostsandTelecommunications,Chongqing400065,China;2.Editori
2、a1Board.urnafofChongqingUniversityofPostsandTelecommunications,Chongqing400065,China)Abstract:HierarchicalclusteringisabasicnetworkingmodelforsensinglayeroftheInternetofthingsbasedonalarge—scalewirelesssensornetwork,amaintainingmethodfornon—periodic,energy—efficientanddynamicclustersispropose
3、dtosolvetheproblemofnumerousenergyconsumptionresultedfromthetraditionalperiodicandwhole—networkre—clusteringmechanism.Onlychangedclustersarere—clusteredwhentheresidualenergyoftheirclusterheadsislessortheirnodesarecompromised,andaschemeofintegratedinner—clustersandinter—clustersmaintainingmeth
4、odisappliedtosingleOtmulti—hopnetwork.Themethodischaracteristicinnon—periodic,localanddynamicresponseforthechangedcluster(S)ornode(S),itsoutstandingmeritisabletolargelyimprovetheenergyefficiencyofsensornodesinthesensinglayeroftheInternetofthings.Simulationresultsimplythattheproposedmethodcang
5、reatlyprolongthelifetimeofnetworkcomparedwiththetraditionalone,concretely,theaveragelifetimeofnetworknodeskeepunder100%activeandmayincreasebynearly9timesinoursimulationsthanclassicLEACHprotoco1.Keywords:theinternetofthings;clustersmaintaining;non—periodical;dynamicresponse;lifetimeEEACC:6150M
6、;6210Cdoi:10.3969/j.issn.1004—1699.2012.12.026物联网感知层非周期动态簇维护方法胡向东h,尚可,魏琴芳(1.重庆邮电大学自动化学院,重庆400065;2.重庆邮电大学学报编辑部,重庆400065)摘要:层次式分簇网络拓扑结构是基于大规模无线传感网的物联网感知层的基本组网模式,为解决传统周期性全局簇维护所带来的大量能量消耗问题,提出一种非周期高效动态簇维护方法。当簇头剩余能量相对较低或节点被敌方攻陷时,只在受影响簇的局域范围进行重新成簇,并针对单跳或多跳网络,采取簇内和簇间维护相结合的策略。该方法对簇或节点状态变化具有非周期、局域和动态响
7、应的特点,突出的优势是可明显改善物联网感知层传感器节点的能量利用效率。仿真实验结果表明:与传统的周期性全局重新成簇方法相比,本方案能够大大延长网络的生命周期,在仿真条件下对比经典LEACH协议.100%节点存活时网络的平均生命周期最高可延长近9倍。关键词:物联网;簇维护;非周期;动态响应;生命周期中图分类号:TP391.9文献标识码:A文章编号:1004—1699(2012)12—1754—07分簇式无线传感网具有可自动感知、自组织、易分这对于能量、计算、存储和通信资源等极为有限
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