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Charging While Moving: Deploying Wireless Chargers for Powering Wearable Devices
- Source :
- IEEE Transactions on Vehicular Technology. 67:11575-11586
- Publication Year :
- 2018
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2018.
-
Abstract
- With the promising technology of far-field wireless power transfer, wearable devices are able to harvest radio frequency (RF) energy from RF-based chargers and thus operate continuously. Rational planning of the quantity and positions of the chargers provide an effective way to improve the recharging efficiency and save the charger deployment budget. Existing work on RF-based charger placement mainly considers the situation where the devices are static, or adopt very simple mobility model. In this paper, we consider wireless charging service provision for wearable devices worn by users in a two-dimensional area, with users having a specific stay–move behavior pattern characterized by the trajectories, stay points, and stay time distribution. Based on this mobility pattern, we formulate the problem as how to find a charger placement to minimize the charging service budget, subject to the power non-outage probability requirement of the wearable devices. We further transform this problem to several equivalent problems for easier tractability and prove that it is NP-complete. Both greedy heuristic and particle swarm optimization (PSO) based solutions are proposed to solve the problem with certain approximation ratio. Finally, performances of the proposed solutions are compared with exhaustive search and existing point provisioning algorithm through extensive simulations. Simulation results show that both greedy heuristic and PSO-based solutions outperform the baseline algorithms, while PSO-based solution requires least number of chargers and thus is the most cost-effective.
- Subjects :
- Mobility model
Computer Networks and Communications
Computer science
business.industry
Real-time computing
Aerospace Engineering
020302 automobile design & engineering
020206 networking & telecommunications
02 engineering and technology
0203 mechanical engineering
Automotive Engineering
0202 electrical engineering, electronic engineering, information engineering
Wireless
Wireless power transfer
Electrical and Electronic Engineering
Greedy algorithm
business
Wireless sensor network
Wearable technology
Subjects
Details
- ISSN :
- 19399359 and 00189545
- Volume :
- 67
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Vehicular Technology
- Accession number :
- edsair.doi...........4f9941109030e8e62e01b34f5a07ec74