@article { author = {}, title = {A NOVEL APPROACH TO MEASURING NODE AND ENERGY UNIFORMITY FOR THE OPTIMAL ASSIGNMENT OF DIRECTIONAL SENSORS}, journal = {Iranian Journal of Science and Technology Transactions of Electrical Engineering}, volume = {37}, number = {1}, pages = {17-33}, year = {2013}, publisher = {Shiraz University}, issn = {2228-6179}, eissn = {}, doi = {10.22099/ijste.2013.1758}, abstract = {One of the prevalent methods to increase the network lifetime is to develop theuniformity in the sensor node distribution and load balancing. The existing criteria to calculate theuniformity are only able to locally or globally measure the uniformity of sensor distribution in thenetwork. In this paper, a new criterion is proposed for the uniformity measurement of sensordistribution. The criterion can calculate the both global and local uniformity in various levels ofnode distribution. In addition, using the model of sensing area of each sensor, this criterion hasbeen generalized for the uniformity of sensors energy distribution in the network via calculatingthe uniformity of sensor node distribution. In order to assess the performance of the proposedcriterion, a set of sensor distribution patterns has been utilized; also, the uniformity calculationresults of these patterns have been studied. Then, a method for the sensor assignment has beenproposed in a network, in which sensor nodes have the possibility of rotation and a coverage areais selected. This method enhances the energy distribution uniformity in the network. Thecomparison is finally provided among the perceived results to show an acceptable performance ofthe proposed method.}, keywords = {Uniformity measurement,global uniformity,local uniformity,directional sensor networks,uniformity maximization}, url = {https://ijste.shirazu.ac.ir/article_1758.html}, eprint = {https://ijste.shirazu.ac.ir/article_1758_4fc1d609db35add2f94bd9bf5f4a5cea.pdf} }