Error compensation algorithm in wireless sensor networks synchronisation

Error compensation algorithm in wireless sensor networks synchronisation
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无线传感器网络同步误差补偿算法

DOI:
10.1504/ijsnet.2011.042196
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发表时间:
2011-08
影响因子:
1.1
通讯作者:
Yu, Haibin
Yu, Haibin
中科院分区:
计算机科学4区
文献类型:
--
作者:
Zeng, Peng;Xiao, Yang;Wang, Fuqiang;Yu, Haibin

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时间同步技术在无线传感器网络中有着广泛的应用,如数据融合、TDMA调度和同步休眠等。时间同步精度是无线传感器网络对时间同步的基本要求。现有的时间同步方法并没有被设计为处理动态环境变化。在本文中,我们提出了一种误差补偿算法,旨在补偿硬件时钟漂移和环境变化引起的误差。该算法按照层次结构工作,每一层节点具有相同的跳数,并采用线性回归分析时钟漂移。补偿机制降低了晶体振荡器引起的不稳定性,消除了运行期间积累的误差。该算法在TinyOS平台SIA2420上实现,实验结果表明了算法的可靠性。
Time synchronisation has been extensively used in wireless sensor networks in many contexts, such as data fusion, TDMA schedules and synchronised sleep periods. Precision is the basic requirement for time synchronisation in wireless sensor networks. Existing time synchronisation methods were not designed to deal with dynamic environment changes. In this paper, we propose an error compensation algorithm which is designed to compensate errors caused by hardware clock drift and environment changes. The algorithm works according to a level hierarchy: the nodes in each level have the same hop and linear regression is adopted to analyse clock drift. The compensation mechanism decreases the instability caused by crystal oscillators and eliminates errors accumulated during running time. The algorithm is implemented on the SIA2420 platform using TinyOS and the results show the reliability of our algorithm.
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发表时间: 2006-12
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影响因子: --
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