Self-Similar Property for TCP Traffic under the Bottleneck Bandwidth Restrainment
Self-Similar Property for TCP Traffic under the Bottleneck Bandwidth Restrainment
复制标题
瓶颈带宽约束下TCP流量的自相似性
DOI：
10.1109/iih-msp.2006.156
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
T. Nakashima
中科院分区：
文献类型：
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作者：
T. Nakashima
在实际网络中已经发现了尺度不变的突发性或自相似性。自相似性与网络和/或系统参数之间的关系主要在应用层的背景下讨论，这种自相似性是由Web服务器的文件大小或用户会话的持续时间引起的。此外，传输层协议还具有自相似突发性的特征。然而，交通动态主要是由资源限制等物理条件产生的。在本文中，我们利用网络模拟器研究了带宽限制下TCP流量的自相似性，使网络参数发生变化。分析模拟结果后，提取了以下属性。首先，在释放瓶颈带宽限制边界处的丢包率突然从10%下降到1%。其次，估计的 Hurst 参数在丢包率超过 4% 时呈现不稳定波动，在丢包率低于 4% 时呈现线性斜率。
The scale-invariant burstiness or self-similarity has been found in real network. Relation between self-similarity and network and/or system parameter is mainly discussed in the context of application layer, and this self-similarity is caused by the file size of Web servers or the duration of user sessions. In addition, self-similar burstiness has been characterized by the transport layer protocol. Traffic dynamics, however, are mainly generated by physical conditions such as the resource restrainment. In this paper, we have investigated self-similar property for TCP traffic under the bandwidth restrainment to make the network parameter vary using the network simulator. After analyzing the simulated results, following properties were extracted. Firstly, the packet loss rate at the boundary of releasing the restriction of bottleneck bandwidth suddenly drops from 10% to 1%. Secondly, estimated Hurst parameter depicts unstable fluctuation at over 4% packet loss rate, with linear slope at under 4% packet loss rate.