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Synthetic load generation for ATM traffic measurements

机译：用于ATM流量测量的综合负载生成

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摘要

The only way to validate the performance of an ATM based network is extensive traffic measurements. Obviously, if such measurements shall be meaningful, they must be carried out under a load with characteristics similar to that of real traffic. The network performance measures obtained, e.g. cell loss, delay and jitter, will depend heavily on the load put on the system. The paper starts with a brief discussion of this issue. Next, an introduction to modelling of ATM traffic sources is given. Various approaches to traffic generation is outlined, before the modelling framework on which the STG is based, is presented. The STG (Synthesised Traffic Generator) is an ATM traffic generator, which is designed to generate a traffic load as realistic as possible, and thereby enable trustworthy ATM system measurements. The source type models include the behaviour of physical sources and the formation of ATM cell streams done by the terminal equipment. How such source type models may be established is discussed and exemplified. In the STG, time varying traffic mixes towards various destinations may be defined. These are denoted load scenarios. One STG can generate the multiplexed traffic stemming from up to 2047 independent sources. A nearly infinite number of independent and reproducible cell load sequences, with the same statistical properties, may be generated for each scenario. The paper concludes with a sketch of how the STG functionality may be extended.
机译：验证基于ATM的网络性能的唯一方法是广泛的流量测量。显然，如果此类测量有意义，则必须在具有类似于实际流量的特征的负载下进行测量。获得的网络性能指标，例如信元损耗，延迟和抖动将在很大程度上取决于系统的负载。本文首先对此问题进行简要讨论。接下来，给出了对ATM流量源建模的介绍。在介绍STG所基于的建模框架之前，概述了各种流量生成方法。 STG（综合流量生成器）是ATM流量生成器，旨在生成尽可能实际的流量负载，从而实现可信赖的ATM系统测量。源类型模型包括物理源的行为以及由终端设备完成的ATM信元流的形成。讨论并举例说明了如何建立这样的源类型模型。在STG中，可以定义到各个目的地的时变流量混合。这些称为负载方案。一个STG可以产生多达2047个独立源的多路复用流量。对于每种情况，可能会生成几乎相同数量的具有相同统计属性的独立且可重现的单元格加载序列。本文以可扩展STG功能的草图作为结尾。

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