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首页> 外文会议>International IFIP-TC6 Networking Conference(NETWORKING 2004); 20040509-20040514; Athens; GR >TCP-DCR: Making TCP Robust to Non-congestion Events
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TCP-DCR: Making TCP Robust to Non-congestion Events

机译：TCP-DCR：使TCP对非拥塞事件具有鲁棒性

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摘要

In this paper, we propose and evaluate TCP-DCR. TCP-DCR makes simple modifications to the TCP congestion control algorithm to make it more robust to non-congestion events. The key idea here is to delay the congestion response of TCP for a short interval of time τ, thereby creating room for local recovery mechanisms to handle any non-congestion events that may have occurred. If at the end of the delay τ, the event is not handled, then it is treated as a congestion loss. We evaluate TCP-DCR through analysis and simulations. The evaluation is done for three scenarios - a wireless network with channel errors, a wired network with packet reordering and a network with zero non-congestion events. The simulation results show that significant performance improvements can be achieved by using TCP-DCR in the presence of non-congestion events with zero or marginal impact in the absence of non-congestion events. TCP-DCR remains fair to the native implementations of TCP that respond to congestion immediately after receiving three dupacks. TCP-DCR is a simple, effective scheme providing a unified solution to several problems with minimal implementation overhead.
机译：在本文中，我们提出并评估了TCP-DCR。 TCP-DCR对TCP拥塞控制算法进行了简单的修改，使其对非拥塞事件更加健壮。此处的关键思想是将TCP的拥塞响应延迟较短的时间间隔τ，从而为本地恢复机制创造空间，以处理可能发生的任何非拥塞事件。如果在延迟τ结束时未处理该事件，则将其视为拥塞损失。我们通过分析和模拟评估TCP-DCR。评估针对以下三种情况进行：有信道错误的无线网络，有数据包重新排序的有线网络和无拥塞事件为零的网络。仿真结果表明，在不存在拥塞事件的情况下，使用TCP-DCR可以实现显着的性能提升，而在不存在非拥塞事件的情况下，影响为零或只有很小的影响。 TCP-DCR对于接收三个dupack后立即响应拥塞的TCP本地实现仍然是公平的。 TCP-DCR是一种简单有效的方案，以最小的实现开销为多个问题提供了统一的解决方案。

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