无线传感器网络中的簇头节点能耗平衡策略

摘要

无线传感器网络(WSNs)具有集中式数据收集和多对一数据通信等特点,使得越靠近汇聚节点的簇头节点能耗越大,最终导致网络中心出现能量空洞.提出一种基于簇内节点分配的簇头节点能耗平衡策略,根据WSNs的分簇汇聚拓扑结构,分析了其中簇头节点的能量消耗情况;在此基础上,通过在各簇内分配一定数量的基本节点,并成比例地增加附加节点的方式,使网络中各簇头节点的能量消耗相等.仿真结果表明:该策略能够适应网络规模和负载的动态变化,最终达到平衡簇头节点能耗的目的.%Wireless sensor networks( WSNs) are characterized by centralized data gathering and many to one data communication pattern. That means the energy consumption of cluster-head nodes which near to the sink node is greater. Aiming at the problem of energy hole, an energy consumption balance strategy for cluster-head nodes is proposed based on distributing nodes in each cluster. According to the clustering aggregation topology in WSNs, the energy consumption of cluster-head nodes is analyzed and the basic nodes and corresponding additional nodes are distributed. Finally, the energy consumption of cluster head nodes in WSNs turns to balance. Experimental results demonstrate that this strategy can adapt the dynamic changes of network size and load, thus balance energy consumption of cluster-head nodes effectively.