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首页> 外文会议>ACM SIGCOMM Internet Measurement Conference(IMC 2003); 20031027-20031029; Miami Beach,FL; US >Source-Level IP Packet Bursts: Causes and Effects
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Source-Level IP Packet Bursts: Causes and Effects

机译：源级IP数据包突发：原因和结果

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摘要

By source-level IP packet burst, we mean several IP packets sent back-to-back from the source of a flow. We first identify several causes of source-level bursts, including TCP's slow start, idle restart, window advancement after loss recovery, and segmentation of application messages into multiple UDP packets. We then show that the presence of packet bursts in individual flows can have a major impact on aggregate traffic. In particular, such bursts create scaling in a range of timescales which corresponds to the burst duration. Uniform "spreading" of bursts in the time axis reduces the scaling exponent in short timescales (up to 100-200ms) to almost zero, meaning that the aggregate traffic becomes practically uncorrelated in that range. This result provides a plausible explanation for the scaling behavior of Internet traffic in short timescales. We also show that removing packet bursts from individual flows reduces significantly the tail of the aggregate marginal distribution, and it improves queueing performance, especially in moderate utilizations (50-85%).
机译：通过源级IP数据包突发，我们是指从流的源以背对背发送的几个IP数据包。我们首先确定导致源级突发的几种原因，包括TCP的缓慢启动，空闲的重启，丢失恢复后的窗口扩展以及将应用程序消息分段为多个UDP数据包。然后，我们表明，单个流中数据包突发的存在会对聚合流量产生重大影响。特别地，这样的突发在对应于突发持续时间的时间尺度范围内产生缩放。时间轴上脉冲的均匀“散布”将短时间标度（最多100-200ms）中的标度指数减小到几乎为零，这意味着在该范围内，总流量实际上变得不相关。此结果为短时间范围内Internet流量的扩展行为提供了一个合理的解释。我们还表明，从单个流中除去数据包突发会显着减少聚合边际分布的尾部，并且可以改善排队性能，尤其是在中等利用率（50％至85％）的情况下。

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