IEICE Electronics Express
Online ISSN : 1349-2543
ISSN-L : 1349-2543
Precise time synchronization based on ripple flooding in wireless sensor networks
Jinyoung YangDaeyoung Kim
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2012 Volume 9 Issue 7 Pages 691-697


Precise time synchronization is inevitable for duty-cycling and TDMA in wireless sensor networks. To achieve a precise synchronized clock between nodes, fast distribution of time information of a reference node to all other nodes in multi-hop without a scheduling is necessary. In this letter, we propose a time synchronization algorithm, RFTS (Ripple Flooding Time Synchronization), that presents the fastest distribution of time information of a reference node by using synchronized packet broadcasting instead of CSMA-CA based broadcasting. We show that error in any hops is not affected by a prior hop node in the evaluation, average error and distribution time of RFTS outperforms widely used FTSP by a factor of 2.5 and 2 respectively.

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© 2012 by The Institute of Electronics, Information and Communication Engineers
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