异构无线传感器网络中一种高效簇头选取方法 VIP免费

I异构无线传感器网络中一种高效簇头选取方法摘要众所周知，传统的传感器节点一般使用非循环利用的电池，可以提供的能量不够充足，所以如何维持网络长时间处于活动状态是无线传感器网络中最关键的问题。实际上，由于网络在运行过程中节点能量的不均匀消耗使得出现节点异构的问题，异构性将会使整个网络变得极其不稳定。传感器网络中的簇为动态的，主要是由邻近的传感器节点连接而成，其中存在一个簇头节点，负责将周围的节点数据接收过来并进行聚合。由于目前物联网的大量普及，所以设计新的路由协议来延长传感器网络寿命迫在眉睫。本文在原有的基础上提出改进了可以稳定簇头的选举协议，简称P-SEP，主要原理是经过消耗平衡能量来使无线网络中首个死亡节点的寿命有所延长。P-SEP考虑两级异构节点，即高级节点和正常节点。这两种类型的节点都有可能被选为簇头，分别利用不同的策略在高级节点和正常节点之间进行簇头选举。仿真实验表明在相同参数设置下P-SEP比SEP更好地平衡了网络中的能量，延长了稳定期和网络寿命。关键词：无线传感器网络寿命稳定期高效簇头聚类能耗IIAnefficientclusterheadselectionmethodinheterogeneouswirelesssensornetworksABSTRACTAsweallknow,conventionalsensornodesgenerallyusenon-recyclablebatteries,whichcanprovideinsufficientenergy.Therefore,howtoprolongthenetworklifetimeisakeyissueinwirelesssensornetworks.Infact,theentirenetworkisextremelyunstableduetotheheterogeneousenergyconsumptionofnodes.Inwirelesssensornetworks,aclusterisdynamicallycomposedofadjacentsensornodes.Andthereisaclusterheadwhichreceiveandaggregatethedatasfromsurroundingnodes.BecauseofthepopularityoftheInternetofThingsnow,weshoulddesignanewroutingprotocoltoprolongthewirelessnetworklifetime.Inthistext,Thispaperproposesanimprovedelectionprotocol,p-sepforshort,whichcanstabilizeclusterheadsonthebasisoftheoriginalone.Themainprincipleistoprolongthelifeofthefirstdeadnodeinthewirelessnetworkbyconsumingequilibriumenergy.Two-levelheterogeneityofnodes,advancednodesandnormalnodesisconsideredinP-SEP.Bothtypesofnodesarelikelytobeselectedasclusterheads.Anddifferentstategiesareusedtoselectclusterheadbetweentheadvancednodesandthenormalnodes.SimulationexperimentsshowthatP-SEPisbetterthanSEPinbalancingthenetworkenergyandprolongingthestabilityperiodandnetworklifetimeunderthesameparameters.Keywords:WirelesssensornetworkLifetimeStableperiodEfficientClusterheadClusteringEnergyconsumptionIIIIV目录第一章绪论...............................................................................................................................................21.1研究目的与意义........................................................................................................................21.2国内外研究现状........................................................................................................................21.3论文主要内容和组织结构........................................................................................................3第二章基于分簇的无线传感器网络路由协议.......................................................................................52.1LEACH协议..............................................................................................................................62.2LEACH-C和LEACH-F协议...................................................................................................72.3DCHS协议.................................................................................................................................82.4CONCH协议..................