LEACH-B: An Improved LEACH Protocol for Wireless Sensor Network

Based on the analysis on the defect in LEACH including the fluctuation of the number of cluster heads and the ignorance of the node´s residual energy, this paper presents a novel protocol called LEACH-B (LEACH-Balanced).At each round, after first selection of cluster head according to LEACH protocol, a second selection is introduced to modify the number of cluster head in consideration of node´s residual energy. As a result the number of cluster head is constant and near optimal per round. The simulation by MATLAB shows that the improved protocol has balanced the system energy consumption and has better performance of prolonging the network lifetime than LEACH protocol.