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| Research on Energy-efficient Time Synchronization Algorithm for Wireless Sensor Networks |
| Wang Yi-jun Qian Zhi-hong Wang Gui-qin Zhang Xu |
| College of Communication Engineering, Jilin University, Changchun 130012, China |
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Abstract The traditional Reference Broadcast Synchronization (RBS) algorithm has a problem that network overhead is very large as the network nodes increase in Wireless sensor networks. An Energy-efficient RBS (ERBS) scheme is presented to work out the network overhead issue. Firstly, every receiving node, which is required to receive a couple of reference messages, computes mean phase offset to its nonadjacent receiving nodes, and estimates phase offset by maximum posteriori estimation; Secondly, the algorithm uses least-squares linear regression to fit clock skew periodically. The analysis on simulation result indicates that ERBS algorithm improve synchronization precision and reduce energy usage over RBS.
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Received: 08 March 2012
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Corresponding Authors:
Qian Zhi-hong
E-mail: dr.qzh@163.com
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2012, Vol. 34 
