Effects of Retransmission Timeouts on TCP Performance and Mitigations: A Model and Verification 


Vol. 29,  No. 7, pp. 675-684, Jul.  2004


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  Abstract

There have been several efforts to avoid unnecessary retransmission timeouts (RTOs), which is the main cause for TCP throughput degradation. Unnecessary RTOs can be classified into three groups according to their cause. RTOs due to multiple packet losses in the same window for TCP Reno, the most prevalent TCP version, can be avoided by TCP New Reno or using selective acknowledgement (SACK) option. RTOs occurring when a packet is lost in a window that is not large enough to trigger fast retransmit can be avoided by using the Limited Transmit algorithm. In this paper, we comparatively analyze these schemes to cope with unnecessary RTOs by numerical analysis and simulations. On the basis of the results in this paper, TCP performance can be quantitatively predicted from the aspect of loss recovery probability. Considering that overall performance of TCP is largely dependent upon the loss recovery performance, the results shown in this paper are of great importance.

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  Cite this article

[IEEE Style]

B. Kim, S. Kim, J. Lee, "Effects of Retransmission Timeouts on TCP Performance and Mitigations: A Model and Verification," The Journal of Korean Institute of Communications and Information Sciences, vol. 29, no. 7, pp. 675-684, 2004. DOI: .

[ACM Style]

Beomjoon Kim, Seoggyu Kim, and Jaiyong Lee. 2004. Effects of Retransmission Timeouts on TCP Performance and Mitigations: A Model and Verification. The Journal of Korean Institute of Communications and Information Sciences, 29, 7, (2004), 675-684. DOI: .

[KICS Style]

Beomjoon Kim, Seoggyu Kim, Jaiyong Lee, "Effects of Retransmission Timeouts on TCP Performance and Mitigations: A Model and Verification," The Journal of Korean Institute of Communications and Information Sciences, vol. 29, no. 7, pp. 675-684, 7. 2004.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880