基于繁忙因子的VVSN自适应双簇头分簇算法研究

在WSN中,节点之间不平衡通信消耗大量能量,因此网络生存时间较短。为改善网络整体生存时间,提出一种基于网络繁忙因子的簇头自适应切换算法。首先,算法一次性选举双簇头,再根据网络实际情况自适应切换簇头。然后,在簇头选举完成后,节点通过当前簇头与基站通信,若当前簇头的能量低于门限值,则网络中的当前簇头将被切换到次级簇头,此时节点通过次级簇头与基站通信,从而降低节点能耗,减少节点的死亡率。双簇头切换机制缩短了整体通信距离,缓解簇头节点过早死亡,使网络生存时间增长。仿真结果表明,该算法通过缩短整体通信距离可显著降低整体网络的能量消耗,增加网络的生存时间。

A Busy Coefficient Based on Dual Cluster Head Algorithm of Adaptive WSN for Energy Consumption Optimization

The communication between sensor nodes plays an important role in Wireless Sensor Network (WSN), because it affects the network lifetime. However, the communication is quite unbalanced, which may result in an increased energy consumption and decreased network lifetime. To address the problem, a busy coefficient based WSN adaptive cluster head switching algorithm was proposed. Firstly, the algorithm chose dual cluster heads, and the nodes communicated with the base station through the current cluster head and adaptively switch the cluster head according to the actual situation in network. Secondly, if its energy was less than the threshold, the current cluster head was switched to the secondary one, and the node communicated with the base station through the secondary one. Finally, the simulation results demonstrated that the proposed algorithm could improve the network lifetime by shortening the overall communication distance of the nodes, thus outperformed in both energy consumption and in network lifetime.