Compound TCP Summary in Advanced Computer Networks CS577 Fall 2013
"Learn about Compound TCP, a Microsoft algorithm addressing issues with standard TCP, proposing a combination of delay-based and loss-based approaches for efficient data transfer over high-speed networks. The key objective is to satisfy efficiency and TCP friendliness simultaneously, with a focus on maintaining two windows - cwnd and dwnd. Conclusions show improved throughput compared to regular TCP."
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Presentation Transcript
Compound TCP Summary (by Song, Zhang & Murari) Advanced Computer Networks CS577 Fall 2013 WPI, Worcester. Presented by Pankaj Didwania and Prof. Kinicki Oct.8th, 2013 1
Compound TCP Microsoft Algorithm Introduced during Vista/2008 Server time Addresses issues with standard TCP that fails in fast data transfer over high speed and long distance networks environments. A combination of delay based and loss based approach is proposed in this paper. 2 CS577: Compound TCP Summary
Key Idea Objective : Satisfy efficiency and TCP friendliness requirements simultaneously Use scalable delay-based component into the standard TCP congestion avoidance algorithm Rapid Window increase when network is under-utilized Gracefully reduce the sending rate once the bottleneck queue is built 3 CS577: Compound TCP Summary
Architecture Maintains two windows: cwnd and dwnd win = min ( cwnd + dwnd, awnd) cwnd: conventional congestion window, controls the loss-based component. dwnd: new variable, controls the delay- based component. awnd: advertised window from the receiver. 4 CS577: Compound TCP Summary
Conclusions CTCP generally improves the throughput by 28% to 52% compared to regular TCP 5 CS577: Compound TCP Summary
Conclusions The bandwidth stolen of CTCP with and without gamma auto-tuning. The markers on x-axis, 1:n, mean that there are one regular flow and n CTCP flows 6 CS577: Compound TCP Summary
References: Paper by Song, Zhang and Murari. Review document : Eric Wang 7 CS577: Compound TCP Summary
