Wireless sensor network are a particular type of ad hoc network, which comprise of hundreds to thousands of miniaturized sensor nodes employed in a wide range of data gathering applications. Each sensor node is small, lightweight and portable with a communication infrastructure intended to track, monitor and record conditions at diverse locations. These limited energy nodes are designed to be deployed randomly in hostile environment and hence recharging of large number of nodes is practically not feasible. Therefore, a major domain of interest in their design is the power management. Channel...