Energy optimization protocol of heterogeneous WSN based on node energy

The stable election protocol (SEP) is an improved algorithm of the Low Energy Adaptive Clustering Hierarchy (LEACH) in heterogeneous wireless sensor networks (WSN) to improve the life cycle. However, the unbalanced energy consumption of cluster heads and the nodes would decrease the lifetime. On the one hand, add the node energy to the election of cluster head to reduce the energy consumption of cluster heads; on the other hand, decrease the energy consumption of the nodes in the cluster through the indirect transmission by intermediate nodes. At least, greedy routing algorithm is also be used to find the best route. The results show that the improved SEP protocol works well in balancing the energy consumption to improve the lifetime comparing LEACH protocol and SEP protocol with the improved SEP protocol by MATLAB.