【作者】 万传飞； 杜尚丰；

【Author】 Wan Chuanfei; Du Shangfeng (College of Information and Electrical Engineering, China Agricultural University, Beijing 10083)

【机构】 中国农业大学信息与电气工程学院；

【摘要】 低功耗自适应分簇(Low Energy Adaptive Clustering Hierarchy,LEACH)算法是无线传感器网络分簇路由中最具代表性的协议之一,但它通过簇首收集簇内数据后直接发送给汇聚节点,而没有综合考虑簇首到汇聚节点的距离,以及簇首之间的相对位置关系。本文在LEACH的基础上提出一种簇间多跳的改进算法:通过对簇头节点实施分层建立一条数据通信链路,把簇头与sink节点之间单跳的直接通信转变为簇头间多跳的转发模式。在Matlab环境下开发一套算法仿真实验平台,并进行对照实验,结果证实改进后的算法可有效降低节点平均能耗,延长网络生存时间,更适用于监测区域广泛,汇聚节点距离传感器节点较远的大型网络。更多还原

【Abstract】 Among Wireless Sensor Network(WSN)hierarchical routing protocols, Low Energy Adaptive Clustering Hierarchy (LEACH)is a fairly popular one, but it directly sents data packets from head nodes to sink, does not take into account the distance between head nodes and sink, or the relative position among head nodes. Thus, on the basis of LEACH protocol, an improved algorithm was proposed. It set up a data communication link between head nodes and sink, changed the single-hop direct communication into multi-hop forward mode. A simulation platform was developed by using Matlab tools, too. Results demonstrate that the improved algorithm is much better than LEACH in energy consumption and can significantly increase the lifetime of the network.。更多还原