RFC 4342, "Profile for Datagram Congestion Control Protocol (DCCP) Congestion Control ID 3: TCP-Friendly Rate Control (TFRC)", March 2006

Note: This RFC has been updated by RFC 5348, RFC 6323, RFC 8311

Errata ID: 830
Status: Verified
Type: Technical
Publication Format(s) : TEXT
Reported By: Eddie Kohler
Date Reported: 2007-02-07

Section 5 says:

   The sender's measurement of the round-trip time uses the Elapsed Time
   and/or Timestamp Echo option contained in feedback packets, as
   described in Section 8.2. The Elapsed Time option is required, while
   the Timestamp Echo option is not.  The sender maintains an average
   round-trip time heavily weighted on the most recent measurements.

It should say:

   The sender's measurement of the round-trip time uses DCCP's mechanisms
   for round-trip time measurement.  This includes Elapsed Time and/or
   Timestamp Echo options.  As described in Section 8.2, feedback packets
   must carry an Elapsed Time option; Timestamp Echo is optional.
   The sender maintains an average round-trip time heavily weighted on the
   most recent measurements.  Senders MAY use any available round-trip time
   measurements, including from the initial Request-Response packet exchange,
   to maintain this average.  This differs from [RFC 3448], which constrains
   round-trip time measurements to feedback packets only.

Notes:

Clarification of round-trip time measurement.

Reported By: Eddie Kohler and Sally Floyd, from Gerrit Renker and Arjuna Sathiaseelan

from pending

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