摘要： 通过对现有时钟同步算法的分析，为消除触发型同步算法中时钟频率偏差对同步误差的影响，提出一种基于频率校正的触发型传感器网络同步算法。该算法中基站监测事件发生时，相关传感器节点通过线性回归计算时钟晶振频率偏差，通过同步信令的交互，估算往返时延和时间差值。仿真结果表明，该算法能达到良好的同步精度。

关键词: 传感器网络, 事件触发, 频率偏差, 时钟同步

Abstract: The existing algorithms of sensor networks is analyzed and compared. In order to eliminate the effects on synchronization errors which is made by the clock skew, an event-triggered time synchronization algorithm based on skew calculation is proposed. In the algorithm, when an event occurs, each related node calculates the clock skew by linear regression, then estimates round-trip delay and synchronization difference by exchanging synchronization signals. Simulation result indicates that the algorithm can reach a desired accuracy.

Key words: sensor network, event-triggered, clock skew, time synchronization

中图分类号: 

• TP393