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Future Internet 2018, 10(8), 73; https://doi.org/10.3390/fi10080073

Joint AP Association and Bandwidth Allocation Optimization Algorithm in High-Dense WLANs

School of Computer Science and Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
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Received: 12 June 2018 / Revised: 1 August 2018 / Accepted: 3 August 2018 / Published: 6 August 2018
(This article belongs to the Section Internet of Things)
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Abstract

Regarding access point (AP) overload and performance anomaly which is caused by mobile terminals with different bitrates, a joint AP association and bandwidth allocation optimization algorithm is presented in this paper. Meanwhile, load balancing and proportional fairness are analyzed and formulated as an optimization model. Then, we present a Fair Bandwidth Allocation algorithm based on clients’ Business Priority (FBA-BP), which allocates bandwidth based on the bandwidth demand of clients and their business priority. Furthermore, we propose a Categorized AP Association algorithm based on clients’ demands (CAA-BD), which classifies APs by different types of clients and chooses an optimal associating AP for a new client according to AP categories and the aggregated demand transmission time that are calculated by the FBA-BP algorithm. The CAA-BD can achieve load balance and solve the performance anomaly caused by multi-rate clients coexisting. The simulation results show that our proposed algorithm obtains significant performance in terms of AP utilization, throughput, transmission delay and channel fairness in different client density levels compared with the categorized and Strong Signal First (SSF) algorithms. View Full-Text
Keywords: AP association; bandwidth allocation; load balancing; WLANs AP association; bandwidth allocation; load balancing; WLANs
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Lei, J.; Tao, J.; Yang, S. Joint AP Association and Bandwidth Allocation Optimization Algorithm in High-Dense WLANs. Future Internet 2018, 10, 73.

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