Cited By
View all- Yang ALi BYang MYan ZXie Y(2020)Utility optimization of grouping-based uplink OFDMA random access for the next generation WLANsWireless Networks10.1007/s11276-020-02489-827:1(809-823)Online publication date: 7-Nov-2020
A two-level medium access framework for exploiting multi-user diversity in multi-rate IEEE 802.11 wireless LANs
Pages 5144 - 5154
Abstract
Fast rate adaptation has long been recognized as an effective way to improve the PHY-layer data rate of wireless networks. However, in random access wireless networks such as IEEE 802.11 wireless LANs, MAC-layer throughput is dominated by stations with the lowest transmission rates, resulting in an underutilization of spectrum bandwidth. In this paper, we propose a novel two-level medium access framework, referred to as Two-Level MAC, to solve the aforementioned problem and to significantly improve system spectrum efficiency through the exploitation of multiuser diversity. The key idea of Two-Level MAC is to introduce a second level of deterministic channel access on top of the traditional IEEE 802.11 DCF protocol. By doing so, higher priority is granted to high-rate stations in a fully distributed manner. Meanwhile, collisions among potential contending stations are drastically reduced. Through analysis, we show how such Two-Level MAC can be optimized to achieve the maximum system throughput. The superiority of the proposed protocol is verified through analyses and extensive simulations.
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- A two-level medium access framework for exploiting multi-user diversity in multi-rate IEEE 802.11 wireless LANs
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Publication History
Published: 01 October 2009
Accepted: 08 July 2009
Revised: 17 February 2009
Received: 30 August 2008
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View all- Yang ALi BYang MYan ZXie Y(2020)Utility optimization of grouping-based uplink OFDMA random access for the next generation WLANsWireless Networks10.1007/s11276-020-02489-827:1(809-823)Online publication date: 7-Nov-2020