On coverage issues in directional sensor networks: A survey
Ad Hoc Networks
A new coverage improvement algorithm based on motility capability of directional sensor nodes
ADHOC-NOW'11 Proceedings of the 10th international conference on Ad-hoc, mobile, and wireless networks
Area coverage enhancement schemes in directional sensor networks
International Journal of Internet Protocol Technology
Visual sensor network lifetime maximization by prioritized scheduling of nodes
Journal of Network and Computer Applications
A hybrid optimisation algorithm for coverage enhancement in 3D directional sensor networks
International Journal of Sensor Networks
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In this paper, we consider the issue of angular mobility assisted coverage enhancement in directional camera sensor networks. In our model, each sensor can visually capture (i.e. sense) events within a sector in its field of view, and can also rotate about a fixed axis to enhance its coverage. The problem we particularly address is how to enhance blanket coverage leveraging angular mobility of the sensors in the network starting from an arbitrary initial deployment. The core idea of our algorithm, called the Face Away algorithm, is to use the known directions of neighboring sensors to find the direction with the least density of neighbors for each sensor, in an attempt to minimize the sensing range overlap between neighboring sensors. The algorithm is localized, light-weight and purely distributed. Simulation results are presented to illustrate the performance of our algorithm as a function of various parameters like number of sensor nodes, sensing range, and angle of view.