Science and Development Network (SciDev.Net)
In this paper, the authors propose a local adaptive transmission power control method to improve the network connectivity, energy efficiency, etc. for wireless sensor networks. Path loss exponent and energy control coefficient are studied carefully to show the minimum cover district of each node more accurately based on network environment and the application scenarios. Their proposed local adaptive power control method can also provide self-healing function which makes the network maintain the best performance for a long time when a few nodes exhaust their energy or a fresh batch of nodes are deployed. Simulation results show that their proposed method is very effective in establishing a good logical network structure and prolonging the network lifetime.