Re: [tcmtf] Next steps with TCM-TF

Manuel,

It sounds good. Could you please provide the link to some documentation
(e.g. a paper, a report) about the "predictably reliable" error control
scheme?

Thanks!

Jose

De: Manuel Gorius [mailto:gorius@nt.uni-saarland.de] 
Enviado el: martes, 10 de septiembre de 2013 14:30
Para: jsaldana@unizar.es
CC: tcmtf@ietf.org
Asunto: Re: [tcmtf] Next steps with TCM-TF

Dear Jose,

It was nice to follow the ideas brought up during the TCM-TF BoF. I think
that a related standard might become important in near future since besides
online gaming there is also a plenty of upcoming interactive and sensor
applications that would be sending small parameter updates (think of smart
factory applications for instance or even e-health services). I highly
appreciate the decision to move the focus away from TCP. Given TCP's limited
efficiency for interactive applications, the concerns of potential impact on
its performance should not put an innovation bottleneck in front of new
ideas improving transport efficiency.

During the BoF session the question of transport reliability for such
multiplexed packet flows was raised. This would be a point where our lab
could contribute. We developed a "predictably reliable" error control scheme
that operates under strict delay constraints. The scheme would particularly
benefit from the larger packets and the higher aggregate data rate of the
multiplexed packet flows. If such error control would be considered
beneficial in TCM-TF, I'd be happy to become active.

Best regards,

          Manuel Gorius

On 09.09.2013, at 18:25, Jose Saldana <jsaldana@unizar.es> wrote:

Dear all,

As you may know, we had a TCM-TF BoF in IETF87 Berlin (
<http://www.ietf.org/proceedings/87/minutes/minutes-87-tcmtf>
http://www.ietf.org/proceedings/87/minutes/minutes-87-tcmtf).

As a result of the BoF, it was clear (IMHO) that there is some interest on
the topic. There were a number of people who thought that a WG should be
created, and several people also volunteered for reviewing documents.

However, in the BoF it was also clear that there are some concerns that have
to be issued before chartering. The main one is the interaction between TCM
optimization and TCP mechanisms. Since TCP controls its rate depending on
the RTT, the addition of a multiplexing delay may modify and even harm TCP
behavior.

As a consequence, we are going to redefine the Charter, removing the
optimization of TCP. So RTP/UDP and UDP will be the considered options for
optimization.

We would like to get more people involved in the discussion, so we would
like to invite those who actively participate on Transport Area discussion
to join the mailing list  <https://www.ietf.org/mailman/listinfo/tcmtf>
https://www.ietf.org/mailman/listinfo/tcmtf, in order to get their feedback.

Thanks in advance,

Jose Saldana

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