A boundary surveillance strategy based on critical line in wireless sensor networks

Environment monitoring is an important class of wireless sensor networks applications. A traditional way for such applications is to deploy sensors all over a region and always aim to cover as more area as possible. However, this way is not only a great waste of money and recourses but also unnecessary and unrealistic. It also invokes many data collisions and brings serious burden to the network protocols. In this paper, we propose a critical line based environment surveillance strategy. We deploy sensors along critical lines instead of all over the region. Our aim is to capture or detect the target or target event rather than tracking it. As coverage is an important factor impacting monitoring, we study the boundary coverage capability under several conditions with consideration of different deploying methods of sensors. We also compare our surveillance strategy with the traditional way, and the results show that our strategy saves great amount of sensors in our strategy.