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802.11 Buffers: When Bigger Is Not Better?

机译:802.11缓冲区:什么时候变大并不更好?

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摘要

While there have been considerable advances in the modelling of 802.11's MAC layer in recent years, 802.11 with finite buffer space is considered difficult to analyse. In this paper, we study the impact of finite buffers' effect on the 802.11 performance, in view of the requirements of interactive applications sensitive to delay and packet loss. Using both state-of-the art and simplified queueing models, we identify a surprising result. Specifically, we find that increased buffering throughout an 802.11 network will not only incur delay, but may actually increase the packet loss experienced by stations. By means of numerical analysis and simulations we show that this non-monotonic behaviour arises because of the contention-based nature of the medium access protocol, whose performance is closely related to the traffic load and the buffer size. Finally, we discuss on protocol and buffer tuning towards eliminating such undesirable effect.
机译:尽管近年来在802.11的MAC层建模方面取得了长足的进步,但具有有限缓冲区空间的802.11被认为难以分析。在本文中,鉴于对延迟和数据包丢失敏感的交互式应用程序的要求,我们研究了有限缓冲区效应对802.11性能的影响。使用最先进的队列模型和简化的排队模型,我们可以得出令人惊讶的结果。具体来说,我们发现在整个802.11网络中增加缓冲不仅会导致延迟,而且实际上可能会增加站点遭受的数据包丢失。通过数值分析和模拟,我们表明这种非单调的行为是由于媒体访问协议的基于竞争的性质而出现的,其性能与流量负载和缓冲区大小密切相关。最后,我们讨论了协议和缓冲区调整以消除这种不良影响。

著录项

  • 来源
    《Wireless access flexibility》|2013年|37-48|共12页
  • 会议地点 Kaliningrad(RU)
  • 作者单位

    Hamilton Institute, National University of Ireland Maynooth;

    Hamilton Institute, National University of Ireland Maynooth;

    TSSG, Waterford Institute of Technology, Ireland;

    Hamilton Institute, National University of Ireland Maynooth;

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  • 原文格式 PDF
  • 正文语种 eng
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