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An Accurate On-demand References Broadcast Synchronization Protocol for Wireless Sensor Network

Recent advances in technology have made low cost and low power wireless sensors a reality. Time synchronization may play a key role in wireless sensor networks. In this paper, The AORBS (accurate On- demand Reference Broadcast Synchronization Protocol) mainly made two improvements on the basis of typical RBS algorithm. Firstly, the node clock is not synchronized with the natural frequency at all time, and the synchronization algorithm will take effect only after an event of interest has happened. Waste is reduced since the system avoids performing synchronization at times when it is not necessary. Furthermore the algorithm achieves the drift compensation by using Taylor expansion but not the linear regression method, greatly reducing the computation cost and improving the synchronization accuracy. As shown in our experimental results: the improved algorithm is more efficient and can be applied to a variety of scopes and types of wireless sensor networks. Copyright © 2013 IFSA.