[e2e] Fwd: Re: Is sanity in NS2?

[Jordan Augé]

Je m'acharnais sur le papier Eurongi du coup je n'ai même pas pris le temps de 
jeter un oeil aux papiers... Effectivement si c'est le cas ca pourrait être 
intéressant de lui soumettre nos idées. J'essaie de lire les papiers d'ici 
demain.

jordan

> Intéressant.
> J'ai rapidement jeté un coup d'oeil aux 2 drafts. Dans les paragraphes
> "Methodology", il n'y a aucune mention de modèle de trafic dynamique (à
> part une mention du "multiplexage statistique" dans le doc. sur les
> métriques, et là ce nest pas clair ce que ça sous entend).
> On devrait poster quelque chose à la redoutable Sally Floyd!
>
> sara
>
> Jordan Augé a écrit :
> >Salut,
> >
> >Je ne sais pas si tu reçois les mails de la liste e2e. A tout hasard je te
> >forwarde ce mail de S. Floyd pour info.
> >
> >jordan
> >
> >----
> >
> >>Unfortunately, submitted papers that both use unvalidated models
> >>and use them in an unvalidated scenario are all too common.
> >
> >The newly-created Transport Modeling Research Group (TMRG) is working
> >towards creating Best Current Practice sets of simulation and testbed
> >scenarios for the evaluation of congestion control mechanisms.
> >These are not intended to be complete benchmarks, but just "you
> >should have tested with these scenarios also".  Towards that end,
> >two documents have been written so far, "Metrics for the Evaluation
> >of Congestion Control Mechanisms" and "Tools for the Evaluation of
> >Simulation and Testbed Scenarios".
> >
> >http://www.icir.org/tmrg/
> >
> >Any feedback and contributions would be welcome, on the tmrg mailing
> >list.  Abstracts are below, for those who are interested.
> >
> >Many thanks.
> >
> >- Sally
> >
> >Metrics for the Evaluation of Congestion Control Mechanisms:
> >
> >    This document discusses the metrics to be considered in an
> >    evaluation of new or modified congestion control mechanisms for the
> >    Internet.  This document is intended to be the first in a series of
> >    documents aimed at improving the models that we use in the
> >    evaluation of transport protocols.
> >
> >
> >Tools for the Evaluation of Simulation and Testbed Scenarios:
> >
> >    This document describes tools for the evaluation of simulation and
> >    testbed scenarios used in research on Internet congestion control
> >    mechanisms.  We believe that research in congestion control
> >    mechanisms has been seriously hampered by the lack of good models
> >    underpinning analysis, simulation, and testbed experiments, and that
> >    tools for the evaluation of simulation and testbed scenarios can
> >    help in the construction of better scenarios, based on better
> >    underlying models.  One use of the tools described in this document
> >    is in comparing key characteristics of test scenarios with known
> >    characteristics from the diverse and ever-changing real world.
> >    Tools characterizing the aggregate traffic on a link include the
> >    distribution of per-packet round-trip times, the distribution of
> >    packet sequence numbers, and the like.  Tools characterizing end-to-
> >    end paths include drop rates as a function of packet size and of
> >    burst size, the synchronization ratio between two end-to-end TCP
> >    flows, and the like.  For each characteristic, we describe what
> >    aspects of the scenario determine this characteristic, how the
> >    characteristic can affect the results of simulations and experiments
> >    for the evaluation of congestion control mechanisms, and what is
> >    known about this characteristic in the real world.  We also explain
> >    why the use of such tools can add considerable power to our
> >    understanding and evaluation of simulation and testbed scenarios.

-- 
Jordan Augé
Téléphone 01 45 29 59 55
France Télécom Division R&D - CORE/CPN (pièce 005 Bat. B)
38-40, rue du Général Leclerc - 92794 Issy les Moulineaux Cedex 9
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