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arXiv 1004.3109cs.PF
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随机网络演算在802.11积压和延迟分析中的应用

Applying Stochastic Network Calculus to 802.11 Backlog and Delay Analysis

Yue Wang

摘要:

随机网络演算提供了一种优雅的方式来描述流量和服务过程。然而,在将其应用于诸如802.11的多址通信系统方面几乎没有做出努力。在本文中,我们采取的第一步,将其应用到积压和延迟分析的802.11无线局域网。特别是,我们解决以下问题:在应用随机网络演算,在什么情况下,我们可以得到稳定的积压和延迟的界限?如何推导802.11无线节点的积压和延迟界限?与模拟相比,这些界限有多紧?为了回答这些问题,我们首先推导出无线节点(不限于802.11)的一般稳定性条件。由此,我们给出了802.11无线节点的具体稳定性条件。然后,我们推导出的积压和延迟边界的802.11节点的基础上现有的802.11模型。我们观察到,推导出的界限是松散的NS-2模拟相比,在当前版本的随机网络演算,需要改进。

英文摘要:

Stochastic network calculus provides an elegant way to characterize traffic and service processes. However, little effort has been made on applying it to multi-access communication systems such as 802.11. In this paper, we take the first step to apply it to the backlog and delay analysis of an 802.11 wireless local network. In particular, we address the following questions: In applying stochastic network calculus, under what situations can we derive stable backlog and delay bounds? How to derive the backlog and delay bounds of an 802.11 wireless node? And how tight are these bounds when compared with simulations? To answer these questions, we first derive the general stability condition of a wireless node (not restricted to 802.11). From this, we give the specific stability condition of an 802.11 wireless node. Then we derive the backlog and delay bounds of an 802.11 node based on an existing model of 802.11. We observe that the derived bounds are loose when compared with ns-2 simulations, indicating that improvements are needed in the current version of stochastic network calculus.

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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