New methods for passive estimation of TCP round-trip times

Bryan Veal, Kang Li, David Lowenthal

Research output: Contribution to journalConference articlepeer-review

52 Scopus citations


We propose two methods to passively measure and monitor changes in round-trip times (RTTs) throughout the lifetime of a TCP connection. Our first method associates data segments with the acknowledgments (ACKs) that trigger them by leveraging the TCP timestamp option. Our second method infers TCP RTT by observing the repeating patterns of segment clusters where the pattern is caused by TCP self-clocking. We evaluate the two methods using both emulated and real Internet tests.

Original languageEnglish (US)
Pages (from-to)121-134
Number of pages14
StatePublished - 2005
Externally publishedYes
Event6th International Workshop on Passive and Active Network Measurement, PAM 2005 - Boston, MA, United States
Duration: Mar 31 2005Apr 1 2005

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Computer Science(all)

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