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
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
CLC Number:
HE Li-ming. Integrated Clock Synchronization Scheme in Wireless Sensor Networks[J]. Computer Engineering, 2009, 35(20): 112-114.
何立明. 无线传感器网络整合时钟同步方案[J]. 计算机工程, 2009, 35(20): 112-114.