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In this paper, the authors propose a distributed transmission power control algorithm which cannot only prolong the lifetime of sensor nodes by saving the energy consumption but enhance the performance of packet delivery ratio. Besides, it can also reduce the interference between transmitting nodes. Before designing their algorithm, they firstly investigate the impact of link quality when utilizing different transmission power by analyzing lots of experimental data, and then design their algorithm based on those experimental results. In their algorithm, each node utilizes the RSSI (Received Signal Strength Indicator) value and LQI (Link Quality Indicator) value of the radio to determine the appropriate transmission power for its neighbors.
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