research unit 1

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Type of publication:Article
Entered by:
TitleEfficient Sensor Network Design for Continuous Monitoring of Moving Objects
Bibtex cite IDRACTI-RU1-2008-8
Journal Journal on "Algorithmic Aspects of Wireless Sensor Networks"
Year published 2008
Month March
Volume 402
Pages 56-66
Note Special Issue of the Theoretical Computer Science (TCS)
Keywords Sensor networks; Tracking; Approximation algorithms; Set cover
We study the problem of localizing and tracking multiple moving targets in wireless sensor networks, from a network design perspective i.e. towards estimating the least possible number of sensors to be deployed, their positions and operation characteristics needed to perform the tracking task. To avoid an expensive massive deployment, we try to take advantage of possible coverage overlaps over space and time, by introducing a novel combinatorial model that captures such overlaps. Under this model, we abstract the tracking network design problem by a combinatorial problem of covering a universe of elements by at least three sets (to ensure that each point in the network area is covered at any time by at least three sensors, and thus being localized). We then design and analyze an efficient approximate method for sensor placement and operation, that with high probability and in polynomial expected time achieves a È(logn) approximation ratio to the optimal solution. Our network design solution can be combined with alternative collaborative processing methods, to suitably fit different tracking scenarios.
Nikoletseas, Sotiris
Spirakis, Paul
sdarticle.pdf (main file)
Publication ID393