首页> 外文会议>International IFIP-TC6 Networking Conference(NETWORKING 2004); 20040509-20040514; Athens; GR >Lost Retransmission Detection for TCP Part 2: TCP Using SACK Option
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Lost Retransmission Detection for TCP Part 2: TCP Using SACK Option

机译:TCP的丢失重传检测第2部分:使用SACK选项的TCP

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The performance of transmission control protocol (TCP) is largely dependent upon its loss recovery. Therefore, whether packet losses may be recovered without a retransmission timeout (RTO) or not is a very important issue. Although TCP using selective acknowledgement (SACK) option can recover multiple packet losses in a window, it cannot avoid RTO if a retransmitted packet is lost again. In order to cope with this problem, we propose a simple change to TCP SACK, which is called TCP SACK+ in simple. We use a stochastic model to evaluate the performance of TCP SACK+, and analyze its performance comparatively in terms of loss recovery probability. Numerical results evaluated by simulations show that TCP SACK+ can improve the loss recovery performance of TCP SACK significantly in presence of random losses.
机译:传输控制协议(TCP)的性能在很大程度上取决于其丢失的恢复。因此,是否可以在没有重传超时(RTO)的情况下恢复丢包是一个非常重要的问题。尽管使用选择性确认(SACK)选项的TCP可以在一个窗口中恢复多个数据包丢失,但是如果重新传输的数据包再次丢失,它无法避免RTO。为了解决此问题,我们建议对TCP SACK进行简单的更改,在简单情况下称为TCP SACK +。我们使用随机模型评估TCP SACK +的性能,并根据丢失恢复概率比较分析其性能。通过仿真评估的数值结果表明,在存在随机损失的情况下,TCP SACK +可以显着提高TCP SACK的损失恢复性能。

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