| Conference Paper |
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| Title |
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Multi Stage Underwater Sensor Localization Using Mobile Beacons
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| Abstract |
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Underwater Sensor Networks (USN) are used for harsh oceanographic missions where human operation is dangerous
or impossible. Localization is essential for USNs. It is
required for data tagging, node tracking and position-based
routing algorithms. Localization is challenging because Global
Positioning System (GPS) is not available in underwater; at the
same time, existing GPS-less schemes based on fixed landmarks
have high communication cost. Such cost is critical in Mobile
Underwater Sensor Networks (MUSN), since sensor nodes drift
with the ocean currents, thus requiring continuous refresh. In
this paper, we propose a multi-stage localization scheme using
mobile beacons. The beacons periodically ascent and descent in
the water column. When they resurface, they receive new GPS
coordinates. Then, they dive to the level of the underwater sensors
to advertise these coordinates. In turn, localized sensors become
proxy beacons and propagate their own coordinates, etc. This
iterative, multi-stage localization is the major innovation of this
paper. The goal is to localize the nodes with the smallest number
of beacons using proxies instead, yet achieving an adequate
accuracy. The major benefit is the reduction in operating costs.
Mobility is a critical factor in determining performance. In this
paper, performance (i.e., the percentage of localized nodes during
a cycle, accuracy, delay and communication cost) is tested in
a simulation scenario based on a realistic mobility model. The
“Meandering Current Mobility with Surface Effect” (MCM-SE)
model - a composite model combining surface and subsurface
currents.
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| Download |
Paper: PDF file of paper
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| Information & Date |
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The Second International Conference on Sensor Technologies and Applications, SENSORCOMM 2008, Cap Esterel, France, August. 2008
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| Authors |
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Melike Erol
Luiz Filipe M. Vieira
Antonio Caruso
Francesco Paparella
Mario Gerla
Sema Oktug
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