Oriented energy-aware scheme used in heterogeneous Wireless Sensor Networks

The main challenge facing us in the design and conception of Wireless Sensor Networks (WSNs)is to find the best way to extend their life span. The clustering algorithm is a key technique used to increase the scalability and life span of the network in general. In this paper, we have proposed an energy aware cluster head selection algorithm, for heterogeneous wireless sensor networks, by modifying the manner in which the nodes transmit their sensing data; In addition we introduce the node's remaining energy so as to compute election probabilities. Finally, simulation results show that the proposed algorithm increases the life span of the whole network and performs better than LEACH and than EEHC according to the metric: first node dies.