Energy Efficient Tracking of Land-Based Targets Using Wireless Sensor Networks
نویسندگان
چکیده
Target tracking is one of the most important applications of Wireless Sensor Networks (WSNs). In this application, a large number of sensors collaborate in the detection and tracking of a target object(s). Because sensors are equipped with non-rechargeable batteries, a key design objective in such applications is to extend the network lifetime while maintaining an acceptable quality of monitoring. One common approach to extend the lifetime of WSNs is to dynamically schedule active /sleep cycles. There are many node scheduling mechanisms published in the literature, most of which, however, assume continuous monitoring with full coverage of the network area. In this paper, we present a dynamic node scheduling mechanism for land-based target detection and tracking applications. To take advantage of the characteristics of such applications, the proposed method requires only the boundary nodes to be in the active mode when no intrusion is detected. In addition, a boundary construction algorithm is proposed that minimizes overlapping coverage among the active boundary nodes. Based on our simulation study, the proposed method achieves better energy conservation than full-area coverage methods while maintaining maximum tracking accuracy.
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تاریخ انتشار 2009