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Abstract
With the advances in inexpensive sensor technology and wireless
communications, development of large-scale wireless sensor networks
(WSNs) has become cost-effective and their viability has attracted
attention from a wide range of civilian, natural, and military applications. The main challenge in the design of WSNs is the limited
battery power of the sensors and the difficulty of replacing or recharging these batteries due to the nature of the monitored field. Thus, it is necessary that the sensors be densely deployed and energy-efficient protocols be designed to maximize the network lifetime while meeting the specific application requirements in terms of coverage and
connectivity. The proposed mechanism is based on a computationally simple but elegant technique of finding a minimum connect sensor cover of the whole region and then select the perimeter nodes that detect
and record the information of a target entering or leaving the
region. The tradeoffs involved in target tracking are tested in
a simulation environment and compared with straightforward
method. The results of the experiments clearly show the benefits
of the new approach in terms of energy consumption.