基于混合天线的能量有效异构WSN分簇算法

基于混合天线的能量有效异构WSN分簇算法

内容简介：针对目前无线传感器网络主要集中于全向天线技术，且分簇路由算法存在簇头分布不均匀、网络稳定周期短、节点能耗不均衡等问题，提出一种基于混合天线的能量有效异构无线传感器网络分簇算法（ECHH）。基于与sink节点的距离为节点分配初始能量，节点可在全向模式和定向模式间自由切换，初始网络将簇头均匀布置形成簇结构，在初始簇结构基础上基于能量和距离选取新簇头，簇头以定向模式向sink发送数据，当网络死亡节点比例超过设定阈值时，存活节点也将以定向模式与sink直接进行通信。仿真结果表明，ECHH算法有效延长了网络稳定周期，提高其在生命周期中所占比例，均衡了各节点能量消耗，具有良好的网络适应性。

Abstract：Considering that the present wireless sensor network (WSN) focuses on omnidirectional antenna technology ,and has problems of cluster head uneven distribution ,short stability period and imbalanced energy consumption ,an energy-efficient clus-tering algorithm based on the hybrid antenna for heterogeneous wireless sensor network ,namely ECHH ,was proposed .The node initial energy was depended on the distance between the sink to the node ,and the node was free to switch between omnidi-rectional pattern and directional pattern ,the cluster heads were uniformly arranged in initial network ,and the new cluster heads were chosen based on energy and distance according to initial cluster structure ,cluster heads sent data to the sink on the direc-tional mode ,when the proportion of dead nodes was larger than that of the given thresholds ,the live nodes communicated direct-ly with the sink on the directional mode .The simulations results show the ECHH algorithm is effective on prolonging the net-work stability period ,improves the stability period proportion in the life cycle ,and balances the energy consumption of every node .At the same time the algorithm has good network adaptability .

作者：孙宝霞, 王卫星, 雷刚, 郑少雄,

关键词：异构无线传感器网络, 分簇算法, 混合天线, 能量有效, 网络稳定周期,