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Efficient end-to-end performance evaluation of ATM networks in an integrated traffic environment.

机译:在集成流量环境中对ATM网络进行有效的端到端性能评估。

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Many performance analysis techniques for Asynchronous Transfer Mode (ATM) networks are limited to simple traffic assumptions, topologies and switch architectures. This is because anything but the simplest of traffic or network models can make simulations too time-consuming or queueing analysis intractable. Consequently, current research focuses on expanding the scope of traffic and network conditions that yield to efficient analysis. This thesis contributes to that goal with a framework for computationally efficient end-to-end queueing analysis of ATM networks. Specifically, this dissertation describes techniques for obtaining steady-state Quality of Service (QOS) measures for simple models of integrated bursty (VBR), constant bit-rate (CBR), and available bit-rate (ABR) traffic. Novel approaches are presented for the analysis of networks of output queueing switches with arbitrary speed-up and buffer size, and with several allowable buffer sharing strategies. Analytic techniques are also developed for flow control mechanisms such as backpressure, rate-based control for ABR traffic, and traffic shaping. An analysis tool with graphical interface has been built to make this work easily accessible.; The traffic modeling and queueing analysis in this work make use of the fluid flow approximation which takes advantage of the small size of the ATM cell compared to buffer sizes. The benefit of this approach is independence of computational complexity from buffer size, making the analysis more flexible than many other approaches. Specific contributions of the work include the following: (1) complex buffer sharing strategies are analyzed with a novel iterative approach that approximates the shared buffer with a simpler to analyze partitioned buffer; (2) queueing analysis is developed for reactive traffic shaping mechanisms in which arrival processes depend on queue length; (3) simple fluid-based edge and inter-node traffic models are introduced for VBR, CBR and ABR traffic streams; and (4) tractable models of traffic mixing processes and ABR traffic streams are developed which yield accurate QOS measurements.
机译:异步传输模式(ATM)网络的许多性能分析技术仅限于简单的流量假设,拓扑和交换机体系结构。这是因为除了最简单的流量或网络模型之外,任何其他方法都可能使模拟变得非常耗时或难以进行排队分析。因此,当前的研究重点是扩大流量和网络条件的范围,以进行有效的分析。本论文通过一个对ATM网络进行高效计算的端到端排队分析的框架,为实现这一目标做出了贡献。具体来说,本论文介绍了用于获得集成突发(VBR),恒定比特率(CBR)和可用比特率(ABR)业务量的简单模型的稳态服务质量(QOS)措施的技术。提出了用于分析具有任意加速和缓冲区大小以及几种允许的缓冲区共享策略的输出排队交换机网络的新颖方法。还为流量控制机制(例如背压,ABR流量的基于速率的控制和流量整形)开发了分析技术。具有图形界面的分析工具已被构建,以使这项工作易于访问。这项工作中的流量建模和排队分析利用了流体流量的近似方法,该方法利用了ATM信元与缓冲区大小相比较小的优点。这种方法的好处是计算复杂度与缓冲区大小无关,从而使分析比许多其他方法更灵活。这项工作的具体贡献包括:(1)使用新颖的迭代方法分析复杂的缓冲区共享策略,该方法用更简单的方法来分析共享缓冲区,从而对共享缓冲区进行近似; (2)针对反应式流量整形机制开发了排队分析,其中到达过程取决于队列长度; (3)为VBR,CBR和ABR业务流引入了简单的基于流体的边缘和节点间业务模型; (4)建立了交通混合过程和ABR交通流的易处理模型,可以产生准确的QOS测量值。

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