A cross‐layer TCP for providing fairness in wireless mesh networks
A cross‐layer TCP for providing fairness in wireless mesh networks
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DOI：
10.1002/dac.1238
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发表时间：
2011-12
影响因子：
2.1
通讯作者：
Jin Ye;Jianxin Wang;Jiawei Huang
中科院分区：
文献类型：
--
作者：
Jin Ye;Jianxin Wang;Jiawei Huang
在无线mesh网络中，资源在不同节点间的公平分配是关键问题之一。现有的解决方案主要集中在速率限制策略或分布式公平MAC方案上，这可能会牺牲网络的总体利用率。本文研究了不同跳数的TCP流之间的一个特殊饥饿问题，以及最近提出的基于IEEE 802.11e的“最小内容窗口”策略。研究发现，由于忽略了该策略对TCP拥塞机制的影响，总吞吐量急剧下降。本文通过使用“跨层显式拥塞通知”提出了基于优先级的拥塞控制。分析和仿真结果表明，该方案可以提高TCP流的公平性，同时总吞吐量比“最小内容窗口”策略至少提高20%。版权所有©2011 John Wiley & Sons， Ltd
The fair allocation of resources among different nodes is one of the critical problems in wireless mesh networks. Existing solutions mainly focus on rate‐limitation policies or distributed fair MAC schemes at the potential expense of total network utilization. This paper investigates a special starvation problem among TCP flows that are different hops away from the BS, as well as its recently proposed solution, the ‘Minimum Content Window’ policy based on IEEE 802.11e. It is found that the aggregate throughput degrades sharply because the effect of this policy on the TCP congestion mechanism has been overlooked. This paper proposes a priority‐based congestion control by using ‘Cross‐Layer Explicit Congestion Notification’. Analysis and simulation results demonstrate that our scheme can improve the fairness of TCP flows while the aggregate throughput is at least 20% higher than the ‘Minimum Content Window’ policy. Copyright © 2011 John Wiley & Sons, Ltd.