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

Source of RFC: dccp (tsv)
See Also: RFC 4342w/ inline errata

Errata ID: 829
Status: Verified
Type: Technical
Publication Format(s) : TEXT

Reported By: Eddie Kohler
Date Reported: 2007-02-07

Section 5 says:

   Translating this to the packet-based congestion control of CCID 3,
   the initial CCID 3 sending rate is allowed to be at least two packets
   per RTT, and at most four packets per RTT, depending on the packet
   size.  The initial rate is only allowed to be three or four packets
   per RTT when, in terms of segment size, that translates to at most
   4380 bytes per RTT.

It should say:

   Therefore, in contrast to [RFC3448], the initial CCID 3 sending rate
   is allowed to be at least two packets per RTT, and at most four
   packets per RTT, depending on the packet size.  The initial rate is
   only allowed to be three or four packets per RTT when, in terms of
   segment size, that translates to at most 4380 bytes per RTT.  This
   might be implemented, for example, by setting the initial sending
   rate to min(4*s, max(2*s, 4380 bytes)), where "s" as usual is the
   packet size in bytes.

Notes:

Clarification of initial sending rates.

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

from pending

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