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Wu, Bin Graduate School of Environmental, Life, Natural Science and Technology, Okayama University
Funabiki, Nobuo Graduate School of Environmental, Life, Natural Science and Technology, Okayama University Kaken ID publons researchmap
Kong, Dezheng Graduate School of Environmental, Life, Natural Science and Technology, Okayama University
Wang, Xuan Graduate School of Environmental, Life, Natural Science and Technology, Okayama University
Seto, Taishiro Graduate School of Environmental, Life, Natural Science and Technology, Okayama University
Fan, Yu-Cheng Department of Electronic Engineering, National Taipei University of Technology
Abstract
Wireless Local-Area Networks (WLANs), as a popular internet access solution, are widely used in numerous places, including enterprises, campuses, and public venues. As the number of devices increases, large-scale deployments will cause the problem of dense wireless networks, including a lot of energy consumption. Thus, the optimization of energy-efficient wireless AP devices has become a focal point of attention. To reduce energy consumption, we have proposed the active access-point (AP) configuration algorithm for WLANs using APs with a dual interface. This uses the greedy algorithm combined with the local search optimization method to find the minimum number of activated APs while satisfying the minimum throughput constraint. However, the previous algorithm basically satisfies only the average throughput among the multiple hosts associated with one AP, wherein some hosts may not reach the required one. In this paper, to overcome this limitation, we propose an enhanced active AP configuration algorithm by incorporating the throughput request satisfaction method that controls the actual throughput at the target value (target throughput) for every host by applying traffic shaping. The target throughput is calculated from the single and concurrent communicating throughput of each host based on channel occupancy time. The minimum throughput constraint will be iteratively adjusted to obtain the required target throughput and achieve the fair throughput allocation. For evaluations, we conducted simulations using the WIMNET simulator and experiments using the testbed system with a Raspberry Pi 4B for APs in four topology cases with five APs and ten hosts. The results show that the proposed method always achieved the required minimum throughput in simulations as well as in experiments, while minimizing the number of active APs. Thus, the validity and effectiveness of our proposal were confirmed.
Keywords
energy-efficient WLAN
IoT
active AP configuration algorithm
throughput request satisfaction method
throughput control
traffic shaping
Published Date
2024-08-07
Publication Title
Symmetry
Volume
volume16
Issue
issue8
Publisher
MDPI
Start Page
1005
ISSN
2073-8994
Content Type
Journal Article
language
English
OAI-PMH Set
岡山大学
Copyright Holders
© 2024 by the authors.
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publisher
DOI
Web of Science KeyUT
Related Url
isVersionOf https://doi.org/10.3390/sym16081005
License
https://creativecommons.org/licenses/by/4.0/
Citation
Wu, B.; Funabiki, N.; Kong, D.; Wang, X.; Seto, T.; Fan, Y.-C. An Enhanced Active Access-Point Configuration Algorithm Using the Throughput Request Satisfaction Method for an Energy-Efficient Wireless Local-Area Network. Symmetry 2024, 16, 1005. https://doi.org/10.3390/sym16081005