Journal of South China University of Technology (Natural Science Edition) ›› 2009, Vol. 37 ›› Issue (5): 17-22.

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

A Bandwidth Allocation Scheme Between Uplink and Downlink Flows in IEEE 802.11 WLAN

Cheng Yan-hong  Li Zhi-shu  Zhu Li   

  1. School of Computer Science, Sichuan University, Chengdu 610065, Sichuan, China
  • Received:2008-07-01 Revised:2008-08-13 Online:2009-05-25 Published:2009-05-25
  • Contact: 程艳红（1972-），女，博士生，主要从事无线网络协议、服务质量及性能评价研究． E-mail:bjcyh@263．net
  • About author:程艳红（1972-），女，博士生，主要从事无线网络协议、服务质量及性能评价研究．
  • Supported by:

    国家中小企业创新基金资助项目（06C26225101730）;四川省科技厅基金重点项目（05GG021-003-2）

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Abstract:

In order to overcome the unfairness bandwidth allocation between uplink and downlink flows in an IEEE 802.11 infrastructure Basic Service Set （BSS） network, a novel bandwidth allocation scheme based on the transi- mission probability is proposed, which adjusts the access probability of access point （AP） or wireless terminals by controlling the transmission probability for a fair bandwidth allocation. The relationship between the optimal trans- mission probability for fair bandwidth allocation and the number of downlink flows is also investigated and is then used as a reference to the bandwidth allocation at AP or wireless terminals. Simulated results show that the proposed scheme leads to a fair bandwidth allocation between uplink and downlink flows.

Key words: IEEE 802.11, fairness, bandwidth, allocation scheme, wireless LAN