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Issue No.02 - Feb. (2013 vol.24)
pp: 406-416
Jun Liu , University of Connecticut, Storrs
Zhong Zhou , University of Connecticut, Storrs
Zheng Peng , Universityy of Connecticut, Storrs
Jun-Hong Cui , University of Connecticut, Storrs
Michael Zuba , University of Connecticut, Storrs
Lance Fiondella , University of Connecticut, Storrs
ABSTRACT
Time synchronization is an important requirement for many services provided by distributed networks. A lot of time synchronization protocols have been proposed for terrestrial Wireless Sensor Networks (WSNs). However, none of them can be directly applied to Underwater Sensor Networks (UWSNs). A synchronization algorithm for UWSNs must consider additional factors such as long propagation delays from the use of acoustic communication and sensor node mobility. These unique challenges make the accuracy of synchronization procedures for UWSNs even more critical. Time synchronization solutions specifically designed for UWSNs are needed to satisfy these new requirements. This paper proposes Mobi-Sync, a novel time synchronization scheme for mobile underwater sensor networks. Mobi-Sync distinguishes itself from previous approaches for terrestrial WSN by considering spatial correlation among the mobility patterns of neighboring UWSNs nodes. This enables Mobi-Sync to accurately estimate the long dynamic propagation delays. Simulation results show that Mobi-Sync outperforms existing schemes in both accuracy and energy efficiency.
INDEX TERMS
Synchronization, Propagation delay, Wireless sensor networks, Accuracy, Delay, Protocols, Linear regression, sensor node, UWSNs, synchronization
CITATION
Jun Liu, Zhong Zhou, Zheng Peng, Jun-Hong Cui, Michael Zuba, Lance Fiondella, "Mobi-Sync: Efficient Time Synchronization for Mobile Underwater Sensor Networks", IEEE Transactions on Parallel & Distributed Systems, vol.24, no. 2, pp. 406-416, Feb. 2013, doi:10.1109/TPDS.2012.71
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