一种新的无线传感器网络时间同步算法

A Novel Time Synchronization Algorithm for Wireless Sensor Networks

在分析以往各种时间同步优化算法的基础上,提出一种改进的无线传感器网络时间同步算法。该算法主要分为三步:首先对节点进行筛选,排除通信有故障的节点,然后将全网节点进行分层以减少WSN网络的复杂性,最后设计相应的传输协议,利用时间同步算法对分层后的节点进行时间同步。实验结果表明,该算法不仅明显提高了网络同步时间的准确度,而且减少了计算时间开销。

Based on the analysis of the advantages and disadvantages of the previous various time syn‐chronization algorithms ,an improved WSN time synchronization algorithm is proposed .The newly proposed algorithm is divided into three steps .First ,the fault nodes are excluded from the network . Second ,the layering nodes in the whole network are conducted to reduce the complexity of the WSN . Finally the corresponding transmission protocol is designed for time synchronization of layered nodes . Experimental results showed that the proposed algorithm significantly improved the network synchro‐nization time and reduced the computational cost at the same time .