Abstract:

Due to the limited energy of sensor nodes in wireless sensor networks, how to use energy efficiently has become a hot topic. The random selection of the LEACH’s cluster heads leads to unreasonable cluster composition, accelerates the death of cluster heads, and the communication between cluster heads and the base station causes huge energy consumption. To solve the problems listed above, in this paper we put forward a routing protocol with higher energy efficiency, in which the area is divided based on the number of the best cluster heads. The cluster heads are selected with comprehensive consideration of the energy consumption within cluster heads and the rest energy of the nodes, and the energy is transmitted by multihops. Simulation results show that the improved protocol can reduce the energy consumption of the whole network dramatically and effectively prolong the network’s lifetime.

Key words: LEACH;uneven clustering;path optimization;optimal number of cluster head;Dijkstra algorithm