Meisam Mapar - Sama technical and vocational training college, Islamic Azad University
Mohsen Heidar Azad Zadeh - ICT Department, SPGC, NIGC
Nilufar Bayati Chaleshtory - Sama technical and vocational training college, Islamic Azad University, Ahwaz

The sensor networks contain many sensors and each sensor has a limited and un-replaceable battery. As each node has a number of different duties, a node's wrong performance leads to energy wasteand its omission from the network structure. In this paper, thanks to sensors placement due to the increase of network lifetime, avigorous algorithm is introduced that is able to cover all areas of network with the lowest cost. This suggested algorithm runs basedon simulated annealing and it can work on networks in which sensors are organized randomly. Since this algorithm analysessensors' status regularly it can be taken as a dynamic algorithm. The simulation results indicate that our proposed algorithm canorganize the best areas of networks with numerous sensors by the lowest possible cost, and it significantly enhances the network's lifetime. It also guarantees that during execution procedure, all network areas are covered by the selected sensors

Wireless Sensor Networks, Sensor, Placement, network's Lifetime, coverage