华南理工大学学报(自然科学版) ›› 2009, Vol. 37 ›› Issue (5): 17-22.

• 电子、通信与自动控制 • 上一篇    下一篇

一种IEEE802.11无线局域网的上下行带宽分配策略

程艳红 李志蜀 朱丽   

  1. 四川大学 计算机学院, 四川 成都 610065
  • 收稿日期:2008-07-01 修回日期:2008-08-13 出版日期:2009-05-25 发布日期:2009-05-25
  • 通信作者: 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
  • 作者简介: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.
  • 基金资助:

    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)

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)

摘要: 针对IEEE802.11基础架构网络中上下行带宽分配不公平的问题,提出了一种新的基于概率发送机制的上下行带宽分配策略,通过调节分组传输概率改变接入点(AP)或终端的接入概率,从而实现上下行带宽的公平分配.文中推导了公平带宽分配的最优发送概率与下行流数的关系,作为在AP或终端进行带宽分配的依据.仿真结果表明,文中策略能够提供准确的上下行带宽分配.

关键词: IEEE802.11 公平性, 带宽, 分配策略, 无线局域网

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