Research on network lifetime optimization based on intermediate nodes in hierarchical clustering WSN

In the large-scale wireless sensor network,the method of selecting the intermediate nodes to construct the hierarchical clustering network can reduce the energy consumption and prolong the network lifetime.In order to select the appropriate intermediate nodes,a low energy path search algorithm named LEPSA is proposed,the algorithm based on the mixed integer linear programming model,potential intermediate nodes is selected from a series of available intermediate nodes according to the residual energy of the nodes in each cluster and the lowest energy consumed by receive and forward data,to determine the best path for data transmission.The simulation results show that compared with P-LEACH protocol and EEM-LEACH protocol ,LEPSA algorithm can effectively reduce the energy consumption of the network,prolong the network lifetime and the computational complexity of the algorithm is not significantly increased.