Transmission Power Control Management for Radio PHY802.15.4 based on LQI for Wireless Sensor Network

Energy-efficiency is an important design consideration of communication schemes for wireless sensor networks (WSNs), because each wireless sensor device (sensor Node) operates with limited sources of Energy (power). There are mainly three modes of power consumption in communication system: Transmission Mode, Receive Mode and Idle Mode. Energy of nodes is consumed according to transmission power required by the radios. In this research, we devise a mechanism, Transmission Power Control Management (TPCM) that saves the battery power of nodes by minimizing the required transmission power consumption of radio during data packet transmission based on Link Quality Indicator (LQI). IEEE 802.15.4 is a standard that specifies the physical layer and media access control designed for low-rate wireless personal area networks (LR-WPANs), it is used as radio at PHY layer (PHY802.15.4) and protocol at MAC layer (MAC802.15.4), and it is generally used for WSNs. In this paper, we use LQI as a parameter to dynamically set required transmission power of radio.