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Vol. 154, Issue 7, July 2013, pp. 42-50

 

Bullet

 

An Accurate On-demand References Broadcast Synchronization Protocol for Wireless Sensor Network
 
1 Cheng Fang Zhen, 1, 2 Wenyi Liu, 2 Yulong Hou

1 Key Laboratory of Instrumentation Science & Dynamic Measurement, North University of China, Ministry of Education, TaiYuan 030051, PR China

2 National Key Laboratory for Electronic Measurement Technology, TaiYuan, Shanxi 030051, PR China

1 Tel.: 13994215981, fax: 0351-3558768

1 E-mail: zcf@nuc.edu.cn

 

Received: 28 April 2013   /Accepted: 19 July 2013   /Published: 31 July 2013

Digital Sensors and Sensor Sysstems

 

Abstract: 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.

 

Keywords: Wireless sensor network, RBS (Reference broadcast synchronization), On-demand, Taylor expand.

 

 

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