基于分簇的无线传感器网络时间同步算法

时间同步是无线传感器网络中一个重要支撑技术,为了提高时间同步精度,提出了一种基于分簇的无线传感器网络时间同步算法;在部署无线传感器网络的初期阶段,建立簇状拓扑结构,首先是基站与簇首节点实现同步,然后簇内实现同步,最终建立一个全网统一的时钟,在同步过程中,采用了成对节点间的同步算法,很好利用了多信道广播方式;该算法能很好地满足无线传感器网络低能耗的要求;性能分析和实验结果表明,该算法减少了同步层次,提高了同步精度。

Cluster-Based Time Synchronization Algorithm for Wireless Sensor Networks

Time synchronization is an important problem for wireless sensor networks.In order to increase the synchronized precision,a cluster-based time synchronization algorithm for wireless sensor networks was proposed.In the initial period of wireless sensor networks'deployment,the topology of cluster was set up.Firstly the time synchronization was established between the base station and cluster heads,then the synchronization was established in the clusters,finally a global timescale throughout the sensor networks is established. In the synchronized process,a pair wise synchronization algorithm was performed,the way of the multi-channels broadcast is well used.The algorithm is satisfied with energy efficient of wireless sensor networks.The performance analyses and experimental results show that the time synchronization algorithm decreased the hierarchy and increased the synchronized precision.