A heading adjustment method in wireless directional sensor networks

The coverage of a region of interest in wireless directional sensor networks is determined by both the positions and the working headings of directional sensors. A considerable number of studies have focused on the maximization of covered area without concerning the differences between the different positions in the region. Actually, since the exposure possibilities between the different points are distinct, the coverage priorities of points are correspondingly different. In this paper, a coverage improvement method based on the Delaunay triangulation by adjusting the headings of sensors is proposed. The proposed method is not only to enlarge the coverage of the region of interest, but also to strengthen the coverage of vulnerable points. With the help of simulations, we show the effectiveness of the proposed method in coverage improvement with various parameters, such as amount of sensors and radius of sensors, compared with other related methods.