Improved Grouping Protocol of Homogeneous Wireless Sensor Network for Smart Environment

Smart environment is widely applied and it is the most important application of wireless sensor networks. Reduction of the energy consumption problem is the key to developing WSN. In the cluster based of energy-efficient method, the fixed cluster head number, the energy of node and the transmission distance are the keys to extending the network lifetime. We propose an improved grouping protocol to make the cluster head number the same with expectancy. The total energy of a group and the distance between node and BS are both used to generate the group. The proposed method is compared with previous works by simulation to evaluate the performances.