A Contention Window Adjustment Algorithm for Improving Fairness between Uplink and Downlink in IEEE 802.11 WLANs 


Vol. 36,  No. 4, pp. 329-336, Apr.  2011


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  Abstract

This paper addresses the fairness issue between uplink and downlink traffic in IEEE 802.11 WLANs. Some solutions in existing work try to solve this issue by giving smaller minimum contention window (CWmin) value to an AP compared to stations. In contrast to the existing solutions, a proposed algorithm in this paper aims at finding CWmin values that not only provides fairness between uplink and downlink traffic among stations but also achieves high throughput. For this, in the proposed algorithm, an AP checks the number of stations that have uplink and downlink traffic, respectively. Based on this information, the AP calculates optimal CWmin values and announces it to stations. Our simulation results show that the proposed algorithm outperforms existing algorithms in terms of fairness and throughput.

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  Cite this article

[IEEE Style]

W. Lim, D. Kim, Y. Suh, D. Kwon, "A Contention Window Adjustment Algorithm for Improving Fairness between Uplink and Downlink in IEEE 802.11 WLANs," The Journal of Korean Institute of Communications and Information Sciences, vol. 36, no. 4, pp. 329-336, 2011. DOI: .

[ACM Style]

Wan-Seon Lim, Dong-Wook Kim, Young-Joo Suh, and Dong-Hee Kwon. 2011. A Contention Window Adjustment Algorithm for Improving Fairness between Uplink and Downlink in IEEE 802.11 WLANs. The Journal of Korean Institute of Communications and Information Sciences, 36, 4, (2011), 329-336. DOI: .

[KICS Style]

Wan-Seon Lim, Dong-Wook Kim, Young-Joo Suh, Dong-Hee Kwon, "A Contention Window Adjustment Algorithm for Improving Fairness between Uplink and Downlink in IEEE 802.11 WLANs," The Journal of Korean Institute of Communications and Information Sciences, vol. 36, no. 4, pp. 329-336, 4. 2011.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880