DEVELOPING IMPROVED ENERGY-BASED NODE CHARGE REPLENISHMENT MODEL IN LARGE-SCALE WIRELESS RECHARGEABLE SENSOR NETWORKS

Abstract

In Wireless Rechargeable Sensor Network (WRSN), the distributed energy-constrained sensor nodes are to be recharged after consuming for sensing operations. In recent days, researches proposed recharging model with single mobile charger that moves along the network to refill each sensor. But, it is not efficient in Large-Scale WRSNs because of that the mobile charger is also having limited energy. It can be solved by using multiple mobile chargers, but, the implementation and maintenance are costlier process. With that note, this paper develops a novel model called Improved Energy-based Node Charge Replenishment Model (IENCR) that contains Single Portable Device (SPD) with Multiple Charger Nodes (MCNs), which are detachable in design. When energy starvation is found in LS-WRSN, the sensors are to be refilled by the SPD that carries Multiple Charger Nodes through which the nodes are provided with energy services concurrently, by fixing the SPD in the locality of one sensor. Moreover, using the proposed model, lifetime of sensors is effectively enhanced and total route path travelled by the SPD can be considerable reduced. In this work, the least active time of each node is evaluated based on its consumed and residual energy levels. Based on that, Analytical Charging Route (ACR) is framed for energy replenishment of the sensor nodes that are running to be in-active or dead. Further, the IENCR model is examined using simulations and the obtained results outperforms the existing works.