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14 April 2021
  » arxiv » 1508.2303

 Article overview

RF-Based Charger Placement for Duty Cycle Guarantee in Battery-Free Sensor Networks
Yanjun Li ; Lingkun Fu ; Min Chen ; Kaikai Chi ; Yi-hua Zhu ;
Rating Members: 3.75/5 (1 reader)
Date 10 Aug 2015
AbstractBattery-free sensor networks have emerged as a promising solution to conquer the lifetime limitation of battery-powered systems. In this paper, we study a sensor network built from battery-free sensor nodes which harvest energy from radio frequency (RF) signals transmitted by RF-based chargers, e.g., radio frequency identification (RFID) readers. Due to the insufficiency of harvested energy, the sensor nodes have to work in duty cycles to harvest enough energy before turning active and performing tasks. One fundamental issue in this kind of network design is how to deploy the chargers to ensure that the battery-free nodes can maintain a designated duty cycle for continuous operation. Based on a new wireless recharge model, we formulate the charger placement problem for node’s duty cycle guarantee as a constrained optimization problem. We develop both greedy and efficient heuristics for solving the problem and validate our solutions through extensive simulations. The simulation results show that the proposed particle swarm optimization (PSO)-based divide-and-conquer approach can effectively reduce the number of chargers compared with the greedy approach.
Source arXiv, 1508.2303
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1 review found:
(To access fulltext of a review, click on titles below.)
1. review 15080069    * Rate this comment.
Review title: Battery free RFID = less trouble in human bodies
Reviewer: reviewer1877
Date: 21 August 2015 at 11:25 GMT.
Comment: Medical applications of sensor networks inside the body would seem to benefit from not needing to get into surgery to replace batteries.

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