JOURNAL OF NETWORKS (JNW)
ISSN : 1796-2056
Volume : 1    Issue : 4    Date : August 2006

An Energy Efficient Approach to Dynamic Coverage in Wireless Sensor Networks
Mohamed K. Watfa and Sesh Commuri
Page(s): 10-20
Full Text:
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Abstract
Tracking of mobile targets is an important application of sensor networks. This is a non-trivial
problem as the increased accuracy of tracking results in an overall reduction in the lifetime of the
sensor network. In this paper, the tracking issue is first addressed through the determination of a
reduced cover for the region of interest. Tracking algorithms are then developed using a reduced set
of sensor nodes. The tradeoffs involved in the energy efficient tracking of the target are studied and
the performance of the distributed tracking algorithms is compared with well known strategies from
the literature. It is shown that the gain in energy savings comes at the expense of reduced quality of
tracking. The algorithms guarantee the robustness and accuracy of tracking as well as the
extension of the overall system lifetime. Numerical simulations are presented to validate the
performance of the proposed algorithms.

Index Terms
ad-hoc and sensor networks, tracking, 3D coverage, energy efficiency, reduced cover.