Mobility-aware charger deployment for wireless rechargeable sensor networks

Abstract

Wireless charging technology is considered as one of the promising solutions to solve the energy limitation problem for large-scale wireless sensor networks. Obviously, charger deployment is a critical issue since the number of chargers would be limited by the network construction budget, which makes the full-coverage deployment of chargers infeasible. In many of the applications targeted by large-scale wireless sensor networks, end-devices are usually equipped by the human and their movement follows some degree of regularity. Therefore in this paper, we utilize this property to deploy chargers with partial coverage, with an objective to maximize the survival rate of end-devices. We prove this problem is N P-hard, and propose an algorithm to tackle it. The simulation results show that our proposed algorithm can significantly increase the survival rate of end-devices. To our knowledge, this is one of very first works that consider charger deployment with partial coverage in wireless rechargeable sensor networks.

Quality of Energy Provisioning for Wireless Power Transfer

“…In [11], Chiu et al exploited the mobility of enddevices to deploy wireless chargers with partial coverage, with an objective to maximize the survival rate of end-devices.…”

“…As it reveals the long term working performance of the node itself, QoEP is essential for many monitoring applications. For example, the health monitoring devices carried by the potential or high-risk patients and powered by deployed wireless chargers [11] are expected to work as much as possible, which calls for a high QoEP. In general, QoEP serves as a useful metric and can be incorporated into many system designs.…”

On using Wireless Power Transfer to increase the max flow of Rechargeable Wireless Sensor Networks

“…Lastly, the authors of [10] aim to place static chargers in a manner that allows mobile nodes to recharge frequently.…”

A Power Balance Aware Wireless Charger Deployment Method for Complete Coverage in Wireless Rechargeable Sensor Networks

“…He et al [10] focused on the omnidirectional wireless charger deployment problem and deployed charging devices in the sensing area of interest to provide enough charging power to maintain the operation of the network, but they explored the space with a more traditional triangle solution. Chiu et al [11] divided the sensing areas into grids and placed omnidirectional wireless chargers on various grid points. Their deployment also took into consideration the moving paths of mobile sensors.…”