Impact of Bottleneck Queue Size on TCP Protocols and Its Measurement
Impact of Bottleneck Queue Size on TCP Protocols and Its Measurement
复制标题
瓶颈队列大小对TCP协议的影响及其测量
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
Masaki Hirabaru
中科院分区：
文献类型：
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作者：
Masaki Hirabaru
瓶颈处的队列大小会影响TCP协议的性能，特别是当在具有大带宽延迟积的网络中运行单个TCP流时。然而，在实验中没有很好地考虑队列大小。本文研究了瓶颈队列大小对TCP协议性能的影响。检查高级TCP的突发性。介绍了估计队列长度的方法。发送UDP数据包序列直到检测到丢失是一种测量排队延迟以估计队列大小的方法。还讨论了在TCP会话中观察丢失以测量往返时间和计算队列大小。实验结果与网络仿真器和一个真实的网络的报告。结果表明，在快速长距离路径中，位于拥塞点的第二层交换机是降低TCP性能的主要因素。
The queue size at a bottleneck would impact the performance of TCP protocols, especially when running a single TCP flow in networks with a large bandwidth-delay product. However, queue size has been not well considered in experiments. This paper shows how bottleneck queue size influences TCP protocols performance. Bursityness of advanced TCPs is examined. Ways of estimating queue size are introduced. Sending a UDP packet train until a loss is detected is a method to measure queuing delay to estimate queue size. Watching a loss in a TCP session to measure round trip time and calculate the queue size is also discussed. Results from experiments with a network emulator and a real network are reported. The results indicated that a layer-2 switch at a congestion point would be a major factor of decreasing TCP performance in a fast long distant path.