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Sensors 2011, 11(9), 8241-8260; doi:10.3390/s110908241

An Inter-Networking Mechanism with Stepwise Synchronization for Wireless Sensor Networks

Graduate School of Information Science and Technology, Osaka University, 1-5 Yamadaoka, Suita, Osaka 565-0871, Japan
Author to whom correspondence should be addressed.
Received: 12 July 2011 / Revised: 1 August 2011 / Accepted: 22 August 2011 / Published: 25 August 2011
(This article belongs to the Section Physical Sensors)
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To realize the ambient information society, multiple wireless networks deployed in the region and devices carried by users are required to cooperate with each other. Since duty cycles and operational frequencies are different among networks, we need a mechanism to allow networks to efficiently exchange messages. For this purpose, we propose a novel inter-networking mechanism where two networks are synchronized with each other in a moderate manner, which we call stepwise synchronization. With our proposal, to bridge the gap between intrinsic operational frequencies, nodes near the border of networks adjust their operational frequencies in a stepwise fashion based on the pulse-coupled oscillator model as a fundamental theory of synchronization. Through simulation experiments, we show that the communication delay and the energy consumption of border nodes are reduced, which enables wireless sensor networks to communicate longer with each other.
Keywords: wireless sensor network; synchronization; pulse-coupled oscillator model wireless sensor network; synchronization; pulse-coupled oscillator model
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Yamamoto, H.; Wakamiya, N.; Murata, M. An Inter-Networking Mechanism with Stepwise Synchronization for Wireless Sensor Networks. Sensors 2011, 11, 8241-8260.

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