Using LiTGen, a realistic IP traffic model, to evaluate the impact of burstiness on performance
Using LiTGen, a realistic IP traffic model, to evaluate the impact of burstiness on performance
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使用LiTGen（一种真实的IP 流量模型）来评估突发性对性能的影响
DOI：
10.1145/1416222.1416253
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发表时间：
2008
影响因子：
2.4
通讯作者：
Vincent Borrel
中科院分区：
文献类型：
--
作者：
C. Rolland;J. Ridoux;B. Baynat;Vincent Borrel
出于实际原因，网络模拟器必须根据尽可能真实的流量模型进行设计。本文介绍了 LiTGen（一种现实的 IP 流量模型）的评估，用于生成具有精确时间尺度属性和性能的 IP 流量。我们使用两种评估方法将 LiTGen 与真实数据跟踪进行比较。这些方法分别允许观察流量突发的原因和后果。使用小波谱分析，我们首先突出了流量的内在特征，并展示了 LiTGen 在广泛的时间尺度上准确再现捕获的流量相关结构的能力。然后，基于模拟的性能分析量化了这些特性对简单排队系统的影响，并证明了 LiTGen 生成合成流量以实现实际性能的能力。最后，我们使用无记忆假设对可能的模型简化进行了调查。
For practical reasons, network simulators have to be designed on traffic models as realistic as possible. This paper presents the evaluation of LiTGen, a realistic IP traffic model, for the generation of IP traffic with accurate time scale properties and performance. We confront LiTGen against real data traces using two methods of evaluation. These methods respectively allow to observe the causes and consequences of the traffic burstiness. Using a wavelet spectrum analysis, we first highlight the intrinsic characteristics of the traffic and show LiTGen's ability to reproduce accurately the captured traffic correlation structures over a wide range of timescales. Then, a performance analysis based on simulations quantifies the impact of these characteristics on a simple queuing system, and demonstrates LiTGen's ability to generate synthetic traffic leading to realistic performance. Finally, we conduct an investigation for a possible model reduction using memoryless assumptions.