On 2/18/2014 12:45 AM, Jose Saldana wrote:
Sure.
We have studied the effect of the added delay (and jitter) on different
services: VoIP, games. We have even used subjective quality estimators in
order to see the degradation as a function of the period.
There's several decades of work - much of this ongoing - studying this
effect. You might look into it and cite some of the existing understanding.
We can include some ideas in the second draft (Delay Limits and Multiplexing
Policies to be employed with Tunneling Compressed Multiplexed Traffic Flows,
http://datatracker.ietf.org/doc/draft-suznjevic-tsvwg-mtd-tcmtf/
AFAICT, this implies you assume that the HCI latency budget is yours to
consume; you need to account for the rest of the system.
Joe
Thanks,
Jose
PS:
A paper about the effect on VoIP:
Jose Saldana, Julian Fernandez-Navajas, Jose Ruiz-Mas, Jenifer Murillo,
Eduardo Viruete, Jose I. Aznar, "Evaluating the Influence of Multiplexing
Schemes and Buffer Implementation on Perceived VoIP Conversation Quality,"
Computer Networks (Elsevier), Volume 56, Issue 7, Pages 1893-1919, May 2012.
doi 10.1016/j.comnet.2012.02.004
Another one about the effect on a game:
Jose Saldana, Julian Fernandez-Navajas, Jose Ruiz-Mas, Eduardo Viruete
Navarro, Luis Casadesus, "Online FPS Games: Effect of Router Buffer and
Multiplexing Techniques on Subjective Quality Estimators," Multimedia Tools
and Applications, Springer. doi 10.1007/s11042-012-1309-4
-----Mensaje original-----
De: Luigi Iannone [mailto:[email protected]]
Enviado el: lunes, 10 de febrero de 2014 16:38
Para: Jose Saldana
CC: Joe Touch; [email protected]; [email protected]
Asunto: Re: [tcmtf] Using the concept of "latency budget" for TCM-TF
Hi,
On 7 Feb. 2014, at 09:44 , Jose Saldana <[email protected]> wrote:
[snip]
The only question that is different in TCM-TF is that we have to
multiplex packets, so for certain services we must define a
"multiplexing period" (the added delay is half the period in average).
In this case, we can control this portion of the added delay. We can
tune the period if the latency gets modified.
Will this be documented in the documents produced by the WG?
I mean, it would be useful to have something that describes performances
with different multiplexing period and may be a recommended setup
depending of the traffic type (e.g. gaming vs voip).
What do you think?
L.
This is why I thought that was interesting here: we can control and
tune a part of the latency in this case.
Joe
Thanks!
Jose
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