Re: [re-ECN] preliminary draft of problem statement- authors wanted

Hi Mirja,

Thanks, that is extremely useful. I will try and incorporate it into the next revision of the document...

Toby

> -----Original Message-----
> From: Mirja Kuehlewind [mailto:mirja.kuehlewind@ikr.uni-stuttgart.de]
> Sent: 24 September 2009 12:28
> To: re-ecn@ietf.org
> Cc: Moncaster,T,Toby,DER3 R
> Subject: Re: [re-ECN] preliminary draft of problem statement- authors
> wanted
> 
> Hi Toby,
> 
> I've tried to fill section 5.3 (see below). I've moved some points form
> 4.
> (Requirements for a Solution) into this section. So I'm not sure if 4.
> is
> still an own section. Might be enough to include on paragraph into the
> introduction.
> I hope this input helps somehow as a starting point for 5.3 or if this
> is not
> what was meant to be there it may be included in some other part on the
> document.
> 
> Mirja
> 
> 
> -----------------------------------------
> 5.3.  Re-feedback as a potential solution
> 
> To eliminate the asymmetry of information between end-points and
> network
> components it can be supposed to re-insert the congestion feedback
> signaled
> by the receiver into the Internet. Thereby an approximation about how
> much
> congestion needs to be expected over the whole path is given. Having
> this
> information within the network the congestion policing can be enforced
> before
> other users get discriminated by "heavy users".
> 
> Considering the ECN information as the downstream congestion and the
> re-feedbacked congestion information as whole-path congestion, the
> upstream
> congestion (or rest-path congestion) can easily be achieved by
> subtracting
> one form the other. That enables network components to be responsive to
> congestion instead just rely on the end-hosts.
> 
> The upstream congestion reveals valuable information at ISP borders. On
> the
> one hand the amount of congestion that will be pushed into a domain can
> become part of an inter-domain agreement. One the other hand the amount
> of
> the expected upstream congestion might lead to switch to a less
> congestion
> network-domain (what might boost the competition to provide a more
> reliable
> network).
> 
> Summing up, the exposure of downstream, upstream and the whole-path
> congestion
> can be achieved by re-insertion of congestion notifications and will
> establish an information symmetry between users and network providers.
> This
> will open a door for incremental deployment and an evolution to new
> congestion responses which are not bounded anymore to an "universal
> rate
> adaptable policy" as the information equilibrium implicit controls a
> fair
> capacity sharing.
> 
> 
> On Thursday 24 September 2009 10:04:03 toby.moncaster@bt.com wrote:
> > Hi Michael,
> >
> > Thanks for the useful feedback. Clearly this document is still in its
> > very early stages. I will try and produce a new version by end of the
> > week  which will hopefully address some of your comments.
> >
> > Meanwhile I am still keen to get volunteers willing to contribute
> chunks
> > of text for any of the sections.
> >
> > Toby
> >
> > > -----Original Message-----
> > > From: Michael Menth [mailto:menth@informatik.uni-wuerzburg.de]
> > > Sent: 23 September 2009 22:41
> > > To: Moncaster,T,Toby,DER3 R
> > > Cc: re-ecn@ietf.org
> > > Subject: Re: [re-ECN] preliminary draft of problem statement-
> authors
> > > wanted
> > >
> > > Hi Toby,
> > >
> > > I read the whole document and still it is unclear in many parts. I
> > > marked them in the attached doc-file. I hope this helps to improve
> its
> > > clarity.
> > >
> > > Regards,
> > >
> > >     Michael
> > >
> > > toby.moncaster@bt.com schrieb:
> > > > Hi All,
> > > >
> > > > As promised here is a new draft of the problem statement with a
> bit
> > >
> > > more meat on the bones. There is still an awful lot of work to be
> done
> > > on this and not too much time to do it. Our absolute deadline to
> get
> > > something in is October 19th - only just over 3 weeks away...
> > >
> > > > As before I would welcome any contributions of text or general
> > >
> > > comments. When I have a bit more time I will do proper xml2rfc
> author
> > > entries for everyone that has contributed... For political reasons
> I
> > > want it to be clear that this is a document that has been worked on
> > > from people across the whole range of the IETF community.
> > >
> > > > Toby
> > > >
> > > >
> ____________________________________________________________________
> > > > Toby Moncaster, Senior Researcher, Network Infrastructure
> Practise
> > > > B54/70 Adastral Park, Ipswich, IP53RE, UK.  +44 7918 901170
> >
> > ---------------------------------------------------------------------
> >
> > > -
> > >
> > > > --
> > > >
> > > > _______________________________________________
> > > > re-ECN mailing list
> > > > re-ECN@ietf.org
> > > > https://www.ietf.org/mailman/listinfo/re-ecn
> > >
> > > --
> > > Dr. Michael Menth, Assistant Professor
> > > University of Wuerzburg, Institute of Computer Science Am Hubland,
> D-
> > > 97074 Wuerzburg, Germany, room B206
> > > phone: (+49)-931/31-86644 (new), fax: (+49)-931/888-6632
> > > mailto:menth@informatik.uni-wuerzburg.de
> > > http://www3.informatik.uni-wuerzburg.de/research/ngn
> >
> > _______________________________________________
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> > re-ECN@ietf.org
> > https://www.ietf.org/mailman/listinfo/re-ecn
> 
> 
> 
> --
> -------------------------------------------------------------------
> Dipl.-Ing. Mirja Kühlewind
> Institute of Communication Networks and Computer Engineering (IKR)
> University of Stuttgart, Germany
> Pfaffenwaldring 47, D-70569 Stuttgart
> 
> web: www.ikr.uni-stuttgart.de
> email: mirja.kuehlewind@ikr.uni-stuttgart.de
> tel: +49(0)711/685-67973
> -------------------------------------------------------------------