虚拟时钟指数逼近的无线传感器网络时钟同步协议

Time Synchronization Protocol in WSN Based on Virtual Clock Index Approximation

提出了一个基于虚拟时钟指数逼近的无线传感器网络时钟同步协议,采用一个虚拟时钟作为全网同步的基础,从而实现全网同步。由于采用虚拟时钟,使得各节点进入网络时有了统一的标准,对时钟扭曲和偏移采用指数逼近的方法,在相差较大时调整快,提高了同步效率。仿真数据证明,本协议能有效地提高同步效率,并适应于不同的网络拓扑。

This paper presents a time synchronization protocol based on the virtual clock index approximation in wireless sensor network. As a result of a virtual clock, each node accesses the network with a uniform standard on clock drift and offset, and the more difference between the node and the virtual clock, the faster the node adjusts its drift and offset, thus improving the synchronization efficiency. Simulation data proves that the protocol can effectively improve the synchronization efficiency, and adapt to different network topologies.