Abstract: Based on LEACH protocol, an improved self-organizing routing algorithm for wireless sensor network is proposed. The algorithm is improved in the cluster head generation of the original LEACH protocol. In the process of cluster head generation, the algorithm compares the current node residual energy with the average residual energy of all wireless sensor network nodes, prevents the nodes whose residual energy is less than the average residual energy of the whole network from being selected as cluster heads, so as to further optimize the balance of energy consumption of nodes in the whole network and effectively delay the dead time of nodes. In the cluster head election stage, the random selection of LEACH is replaced by purposeful screening so as to reduce the energy consumption of wireless sensor network and extend the network life cycle. The test is carried out by MATLAB simulation software. The experimental results show that the improved algorithm can improve the life cycle of wireless network, balance the energy consumption of wireless network, increase network throughput, and effectively delay the dead time of wireless network nodes.

Key words: WSN, LEACH protocol, remaining energy, energy balance