Date Added: May 2009
Sensor nodes may be equipped with a "Directional" sensing device (such as a camera) which senses a physical phenomenon in a certain direction depending on the chosen orientation. In this paper, the authors address the problem of selection and orientation of such directional sensors with the objective of maximizing coverage area. Prior works on sensor coverage have largely focused on coverage with sensors that are associated with a unique sensing region. In contrast, directional sensors have multiple sensing regions associated with them, and the orientation of the sensor determines the actual sensing region.