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On the Selection of Transmission Range in Underwater Acoustic Sensor Networks
Sensors 2012, 12(5), 5486-5501; doi:10.3390/s120505486

Localization with a Mobile Beacon in Underwater Acoustic Sensor Networks

School of Information and Mechatronics, Department of Nanobio Materials and Electronics, WCU, Gwangju Institute of Science and Technology (GIST), 1 Oryong-dong, Buk-Gu, Gwangju 500-712, Korea
* Author to whom correspondence should be addressed.
Received: 21 March 2012 / Revised: 23 April 2012 / Accepted: 23 April 2012 / Published: 27 April 2012
(This article belongs to the Special Issue Underwater Sensor Nodes and Underwater Sensor Networks)
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Localization is one of the most important issues associated with underwater acoustic sensor networks, especially when sensor nodes are randomly deployed. Given that it is difficult to deploy beacon nodes at predetermined locations, localization schemes with a mobile beacon on the sea surface or along the planned path are inherently convenient, accurate, and energy-efficient. In this paper, we propose a new range-free Localization with a Mobile Beacon (LoMoB). The mobile beacon periodically broadcasts a beacon message containing its location. Sensor nodes are individually localized by passively receiving the beacon messages without inter-node communications. For location estimation, a set of potential locations are obtained as candidates for a node’s location and then the node’s location is determined through the weighted mean of all the potential locations with the weights computed based on residuals.
Keywords: localization; range-free; mobile beacon; underwater acoustic sensor networks localization; range-free; mobile beacon; underwater acoustic sensor networks
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Lee, S.; Kim, K. Localization with a Mobile Beacon in Underwater Acoustic Sensor Networks. Sensors 2012, 12, 5486-5501.

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