Energy Minimization Scheme for Cluster based Sensor Networks
R. Jayaparvathy, Rajagopal Maheswar · 2009
Abstract—Wireless sensor networks consist of spatially distributed sensor devices with sensing, computation capabilities and wireless communication. A critical issue in wireless sensor networks is the limited availability of energy and hence optimizing energy is very important. In any sensor node, transitions from idle to busy state and vice versa consume most of the energy. We propose a new scheme to reduce the energy 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 cluster based sensor network and analyze the performance of the proposed scheme in terms of performance parameters such as energy 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. Index Terms—Wireless sensor network, cluster, data delivery delay, energy consumption, queue threshold I.