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Temporal Fairness Provisioning in Wirless LANs Considering Transport Layer Protocols  

Kang, Ji-Myung (한국전기연구원 융합기술연구단)
Cho, Seong-Ho (삼성전자 기술총괄)
Choi, Sun-Woong (국민대학교 전자공학부)
Kim, Chong-Kwon (서울대학교 전기.컴퓨터공학부)
Publication Information
Journal of KIISE:Information Networking / v.35, no.5, 2008 , pp. 374-383 More about this Journal
Abstract
IEEE 802.11 WLANs support various data rates in order to adapt to wireless channel condition. It is known that when some WLAN stations use a lower data rate than the others, total throughput is considerably degraded. The concept of temporal fairness which provides equal time to all stations has been introduced to alleviate this performance anomaly problem. However, most previous mechanisms assume that stations have infinite backlogs in the MAC layer and do not consider transport layer. In this paper, we first examine and analyze the performance of previous methods considering transport layer protocols. We then propose two new temporal fairness guarantee methods: AP priority and dynamic CWmin adjustment. We carried out extensive performance study via ns-2 computer simulations. The results show that the proposed methods provide temporal fairness and improve the throughput of WLANs in various environments.
Keywords
IEEE 802.11; Wireless LAN; Temporal fairness; Transport layer;
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