Back to Search
Start Over
Minimizing Charging Delay for Directional Charging.
- Source :
- IEEE/ACM Transactions on Networking; Dec2021, Vol. 29 Issue 6, p2478-2493, 16p
- Publication Year :
- 2021
-
Abstract
- As a more energy-efficient WPT technology, directional WPT is applied to supply energy for wireless rechargeable sensor networks (WRSNs). Conventional methods that ignore anisotropic energy receiving property of rechargeable sensors cause a waste of energy. To address this issue, in this paper, we focus on minimizing the charging delay with a directional charging scheme. At first, we introduce linear constraints to improve an energy transfer model, which is verified to be practical by experiments. Then, we concern a Minimal chArging Delay with Single charger (S-MAD) problem to promote efficiency, followed by an Optimal Direction Charge with Single charger (S-ODC) solution. Through discretizing charging power and angle, we bound the performance gap of the solution to the optimal one with $\text{a}^{^{^{^{}}}}\,\,\frac {1}{1-\epsilon ^{2}}$ approximation ratio, where $\epsilon $ is the error threshold of discretization. After that, we extend the original S-MAD problem into the large scale WRSN with multiple chargers (i.e., M-MAD) and solve it by proposing M-ODC (i.e., Optimal Direction Charge with Multiple chargers (M-ODC)). Theoretical analyses are presented to exploit the feature of the proposed schemes. Finally, we demonstrate that our methods outperform the baseline methods by an average of 34.2% through simulations and test-bed experiments. [ABSTRACT FROM AUTHOR]
- Subjects :
- WIRELESS sensor networks
ENERGY transfer
POWER resources
Subjects
Details
- Language :
- English
- ISSN :
- 10636692
- Volume :
- 29
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- IEEE/ACM Transactions on Networking
- Publication Type :
- Academic Journal
- Accession number :
- 154237353
- Full Text :
- https://doi.org/10.1109/TNET.2021.3095280