Monitoring the illegal movement across national border effectively is a challenging problem. The emerging\ntechnology of wireless sensor network (WSN) is expected to provide a new way to realize energy-efficient border\nintrusion detection. We propose a scheme to measure and guarantee the coverage quality of WSN. We also design a\nnew coverage model for detecting one-direction path. The simulation results shows that the new coverage model\ncould not only detect the intrusion in border area well, but also extend the network lifetime in an efficient way.
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