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arXiv 1002.4833cs.NI
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无线局域网中不公平性问题的分析评估

Analytical Evaluation of Unfairness Problem in Wireless LANs

Ahmed Mohamedou, Mohamed Othman

摘要:

使用无线局域网的用户数量呈指数级增长,他们的行为也在日复一日地发生变化。如今,由于视频共享等服务和应用的爆炸式增长,无线局域网的用户正在使用大量的带宽。这种情况对无线LAN性能造成了巨大的压力,特别是在无线站之间的公平性方面。在饱和状态下,有限的资源没有得到公平的分配。最重要的资源是接入点缓冲空间。这种重要性是由于接入点是两种不同类型网络之间的瓶颈。这两种类型是具有相对较大带宽的有线网络和具有较小带宽的无线网络。同时,由于传输控制协议(TCP)的贪婪性,不公平性问题也越来越严重。在本文中,我们进行了全面的研究,无线局域网的动力学,并提出了一个新的数学模型,描述其行为的性能和影响。我们使用仿真技术验证所提出的模型。所提出的模型是能够产生很好的近似在大多数情况下。它还让我们深入了解了无线LAN行为中的有效变量以及不公平问题的维度。

英文摘要:

The number of users using wireless Local Area Network is increasing exponentially and their behavior is changing day after day. Nowadays, users of wireless LAN are using huge amount of bandwidth because of the explosive growth of some services and applications such as video sharing. This situation imposes massive pressure on the wireless LAN performance especially in term of fairness among wireless stations. The limited resources are not distributed fairly in saturated conditions. The most important resource is the access point buffer space. This importance is a result of access point being the bottleneck between two different types of networks. These two types are wired network with relatively huge bandwidth and wireless network with much smaller bandwidth. Also the unfairness problem is keep getting worse because of the greedy nature Transmission Control Protocol (TCP). In this paper, we conduct a comprehensive study on wireless LAN dynamics and proposed a new mathematical model that describes the performance and effects of its behavior. We validate the proposed model by using the simulation technique. The proposed model was able to produce very good approximation in most of the cases. It also gave us a great insight into the effective variables in the wireless LAN behavior and what are the dimensions of the unfairness problem.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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