摘要： 针对多数无线传感器网络时钟同步方案存在的仅纠正时钟偏移问题，提出一种新的解决方案，整合时钟偏移同步和时钟速率同步，通过3个连续的消息传输实现单跳同步，采用分层的生成树实现多跳同步。仿真实验结果表明，与现有的同步方案比较，该方案的同步错误更小，能够获得更长的再同步周期。

关键词: 无线传感器网络, 时钟同步, 时钟偏移, 时钟速率

Abstract: Aiming at the problems that for the existed synchronization schemes in Wireless Sensor Networks(WSNs) have a main drawback that they only correct the clock offset, a novel clock synchronization scheme is proposed to integrate clock offset synchronization and clock rate synchronization. In this scheme, single-hop synchronization is based on three consecutive message transmissions, and multiple-hop synchronization is based on a layered spanning tree. Simulation experimental results show this scheme can achieve longer resynchronization period and less synchronization error than existed ones.

Key words: Wireless Sensor Networks(WSNs), clock synchronization, clock offset, clock rate

中图分类号: 

• TP393.02