Sync-TCP is based on Reno's congestion control, but in addition adapts its cwnd according to changes in one-way delay.

The name "Sync-TCP" is actually a misnomer - the developers initially assumed synchronized clocks between the two TCP endpoints, but it turns out that this isn't actually required by the protocol.


  • Delay-based early congestion detection and adaptation in TCP: impact on web performance, M.C. Weigle, K. Jeffay, F. Donelson Smith, to appear in: Computer Communications. Preprint:
  • Sync-TCP in high-speed environments, A. Khan, D.M. Shah, Z. Xu, Proc. 43rd annual ACM Southeast Regional Conference, Vol. 2, 2005 - ACM portal
  • _posting about Sync-TCP to the ICCRG Mailing List, M. Weigle, November 2006.

-- SimonLeinen - 22 Nov 2006

Topic revision: r1 - 2006-11-22 - SimonLeinen
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