Simple, accurate time synchronization for wireless sensor networks
Simple, accurate time synchronization for wireless sensor networks
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DOI：
10.1109/wcnc.2003.1200555
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发表时间：
2003-03
期刊：
影响因子：
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通讯作者：
M. Sichitiu;Chanchai Veerarittiphan
中科院分区：
文献类型：
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作者：
M. Sichitiu;Chanchai Veerarittiphan
时间同步对于任何分布式系统都很重要。特别是，无线传感器网络在许多环境中广泛使用同步时间(例如，用于数据融合、TDMA调度、同步睡眠周期等)。现有的时间同步方法在设计时没有考虑到无线传感器，需要扩展或重新设计。我们的解决方案围绕着开发一种与无线传感器网络相关的确定性时间同步方法。提出的方案在网络带宽、存储和处理方面的复杂性最小，并且可以达到很好的精度。与传感器网络高度相关，它还为偏移量和时钟漂移提供了严格的、确定的界限。提出了一种全网同步的方法，为数据融合做准备。无线自组织网络的实际实现被用来评估所提出的方法的性能。
Time synchronization is important for any distributed system. In particular, wireless sensor networks make extensive use of synchronized time in many contexts (e.g. for data fusion, TDMA schedules, synchronized sleep periods, etc.). Existing time synchronization methods were not designed with wireless sensors in mind, and need to be extended or redesigned. Our solution centers around the development of a deterministic time synchronization method relevant for wireless sensor networks. The proposed solution features minimal complexity in network bandwidth, storage and processing and can achieve good accuracy. Highly relevant for sensor networks, it also provides tight, deterministic bounds on both the offsets and clock drifts. A method to synchronize the entire network in preparation for data fusion is presented. A real implementation of a wireless ad-hoc network is used to evaluate the performance of the proposed approach.