ABSTRACT

A critical issue in wireless sensor networks is the limited availability of power and hence optimizing power is very important. In any sensor node, transitions from idle to busy state and vice versa consume most of the power. We propose a new scheme to reduce the power consumption of nodes by reducing the number of transitions of the sensor node based on the number of packets in the queue i.e., queue threshold. We develop an analytical model of a wireless sensor network with finite buffer capacity and analyze the performance of the proposed scheme in terms of performance parameters such as power consumption and mean delay. We also derive the expression for the optimal value of threshold. Results show that the power consumption reduces by 42% for the optimal threshold value when compared to no threshold condition. We perform simulations and the results obtained show that the analytical results match with the simulation results thus validating the analytical model.