Lightweight Precision-Adaptive Time Synchronization in Wireless Sensor Networks
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概要
- 論文の詳細を見る
Time synchronization is an essential service for wireless sensor networks (WSNs). However, fixed-period time synchronization can not serve multiple users efficiently in terms of energy consumption. This paper proposes a lightweight precision-adaptive protocol for cluster-based multi-user networks. It consists of a basic average time synchronization algorithm and an adaptive control loop. The basic average time synchronization algorithm achieves 1µs instantaneous synchronization error performance. It also prolongs re-synchronization period by taking the average of two specified nodes local time to be cluster global time. The adaptive control loop realizes diverse levels of synchronization precision based on the proportional relationship between sync error and re-synchronization period. Experimental results show that the proposed precision-adaptive protocol can respond to the sync error bound change within 2 steps. It is faster than the exponential convergence of the adaptive protocols based on multiplicative iterations.
- 2010-09-01
著者
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Li Li
Department of Gynecology, The People's Hospital of Xinjiang Province, Xinjiang Medical University
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Wang Hui
Department Of Clinical Laboratories Peking Union Medical College Hospital Chinese Academy Of Medical
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Yang Huazhong
Department Of Electronic Engineering Tnlist Tsinghua University
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Wang Hui
Department Of Electronic Engineering Tnlist Tsinghua University
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LIU Yongpan
Department of Electronic Engineering, TNList, Tsinghua University
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Liu Yongpan
Department Of Electronic Engineering Tnlist Tsinghua University
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Li Li
Department Of Cardiology Renmin Hospital Of Gansu Province
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Li Li
Department Of Electronic Engineering Tnlist Tsinghua University
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Li Li
Department Of Cancer Epidemiology Chinese Academy Of Medical Sciences
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Wang Hui
Department of Anatomy and Neurobiology, School of Basic Medical Science, Central South University
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