[dccp] draft-ietf-dccp-tfrc-voip-05.txt

[Sally Floyd <floyd at icir.org>]

I sent in the revised version of draft-ietf-dccp-tfrc-voip-05.txt
this morning, in response to feedback from Working Group Last Call.  
A local copy is available at:

http://www.icir.org/floyd/papers/draft-ietf-dccp-tfrc-voip-05.txt
http://www.icir.org/floyd/papers/draft-ietf-dccp-tfrc-voip-05.ps

Figures for the graphs are available at:

http://www.icir.org/tfrc/voipsims-05/voipimages-05.ps
http://www.icir.org/tfrc/voipsims-05/voipimages-05.pdf

The list of changes is appended below.  The most interesting additions
are the last two tables in Section 7.3.   "These two sets of
simulations illustrate the dangers of a widespread deployment of
TFRC-SP in an environment where small packets are less likely to
be dropped than large ones."

- Sally
http://www.icir.org/floyd/

     Changes from draft-ietf-dccp-tfrc-voip-04.txt:
      * Added tables showing the response function for TCP, TFRC,
        and TFRC-SP, for a range of packet sizes, for both
        packet and byte drop rates.  In response to feedback
        from Magnus Westerlund.
      * Along with response function, added that TCP's sending
        rate varies linearly with packet size.  From a
        suggestion by Magnus Westerlund.
      * Added a sentence saying that TCP has a range of sender
        algorithms for setting the RTO.
      * Deleted the sentence equating TFRC-SP with TFRC-PS
        referred to in RFC 3448.  From a suggestion
        by Colin Perkins.
      * Added that wireless links sometimes are less likely to
        drop small packets.  Reported from Pete Sholander.
      * Added simulations to the end of Section 7.3 comparing
        the effects of TFRC and of TFRC-SP, for an environment
        with a Drop-Tail queue in bytes, showing the possible
        negative consequences of TFRC-SP.  In response to email
        from Magnus Westerlund.
      * Added an explanation for the Adaptive RED simulation
        with packet drop rates greater than 50%. In response
        to email from Magnus Westerlund.
      * Added a Conclusions section, with a sentence that a
        separate document will be used to specify an
        experimental CCID based on TFRC-PS.  In response
        to feedback during Working Group Last Call.
      * Added a paragraph about "Initializing the Loss History
        after the First Loss Event" in TFRC-SP.