北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2011, Vol. 34 ›› Issue (2): 126-130.doi: 10.13190/jbupt.201102.126.zhangb

• 研究报告 • 上一篇    下一篇

IEEE 802.11中上下行带宽公平分配机制

张兵1,高泽华1,2,文柳1,高峰1,徐大雄1   

  1. 1.信息光子学与光通信教育部重点实验室(北京邮电大学), 北京 100876;2.泛网无线通信教育部重点实验室(北京邮电大学), 北京 100876
  • 出版日期:2011-04-30 发布日期:2011-04-30

Study on Fair Bandwidth Allocation Scheme between Uplink and  Downlink Flows under IEEE 802.11

  • Online:2011-04-30 Published:2011-04-30

摘要:

为了提高网络整体性能,提出了一种基于Markov模型的概率发送机制——上下行带宽公平分配机制,不需要对现有客户端做任何改动,可通过调节接入点的最小竞争窗口和分组传输概率,实现上下行带宽的公平分配. 推导了不同上下行数据流条件下保证带宽公平分配的接入点最优发送概率. 仿真结果表明,该策略能在不降低系统总吞吐量的情况下提供精确的上下行带宽分配.

关键词: Markov模型, 公平性, 带宽, 分配策略

Abstract:

To improve the overall performance of the network, a transmission mechanism of probability based on the Markov model has been proposedfair bandwidth allocation scheme between uplink and downlink flows. There is no need to make changes to the distributed coordination function protocol of station. Only by adjusting the minimum contention window and transmission probability of access point, the fairness between uplink and downlink can be achieved. Detailed simulation results show that the scheme can achieve fairness between uplink and downlink flows with the total throughput increased.

Key words: Markov model, fairness, bandwidth, allocation scheme