Dynamic transmission power control in wireless sensor networks using P-I-D feedback control technique

Energy consumption of Sensor Nodes is an important issue in Wireless Sensor Network design. Since most of the nodes are minuscule battery operated, increased energy consumption will lead to reduced life time of nodes. One of the mechanism used in WSN for reducing energy consumption is the Transmission Power Control. Transmitting at a constant / highest power level leads to energy wastage and also increases the chances of interference in the network. Hence, by controlling the transmission power, energy can be conserved. In this paper we implement a dynamic transmission power control scheme using PID feedback mechanism. We control the RSSI and LQI using PID mechanism with an aim of reducing the energy consumption without compromising link quality. Performance has been evaluated based on both simulation and experimental results. In addition, we compare it with the well known Adaptive Transmission Power Control Algorithm (ATPC).