A MAC approach for dynamic power control in wireless sensor network

To design energy efficient Medium Access Control (MAC) protocol for maximizing the network lifetime in Wireless Sensor Network (WSN), is evolving as a challenging portal in research area. The overall radio energy inherently depends on network workload as well as the radio characteristics. Therefore, we have proposed a Dynamic Power Control MAC (DPCMAC) protocol which supports variable power level transmission of packets according to data rate of sources. Our novel approach minimizes the aggregate energy consumption in all power states according to the network traffic. Moreover in our protocol, we calculate the desired power level for the transmission of packets for two types of scenarios: low and high network workload. The protocol is simulated for the variable size of networks and its performance is analyzed on the basis of success rate and energy consumption. The simulation results show that our protocol outperforms the existing Sensor MAC (SMAC) protocol.