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

[<[e-mail]>]

Hi Michael,

Thanks for this, extremely useful. I will try to decide which of these
versions fits best into the document. If anyone has views on that shout
now!

Toby

> -----Original Message-----
> From: Michael Menth [mailto:[e-mail]]
> Sent: 25 September 2009 00:01
> To: Moncaster,T,Toby,DER3 R
> Cc: [e-mail]
> Subject: Re: [re-ECN] preliminary draft of problem statement- authors
> wanted
> 
> Hi Toby,
> 
> here is some text for the abstract.
> 
> >    We need to add an abstract summarising the problem and pointing
> >
> >    towards congestion exposure as an answer...
> >
> 
> I like it short:
> 
> The idea of congestion exposure means that a flow reveals an estimate
> of
> the congestion it causes on its remaining downstream path. It makes
> policing or other actions depending on downstream congestion in the
> Internet more effective and leads thereby to a more efficient and
> fairer
> Internet. This document motivates the need for congestion exposure and
> illustrates its usefulness in different use cases. Therefore, actions
> should be taken to implement a simple form of congestion exposure in
> the
> Internet.
> 
> However, an enumeration for what congestion exposure may be useful can
> help to catch the reader's interest:
> 
> The idea of congestion exposure means that a flow reveals an estimate
> of
> the congestion it causes on its remaining downstream path. Congestion
> exposure may be useful for various purposes, e.g.,  meaningful
policing
> at network ingresses, congestion-based accounting between ISPs, fairer
> bandwidth sharing among users, increased trust in the
> congestion-responsiveness of end-systems, and possibly
> congestion-dependent load balancing and routing. Therefore, congestion
> exposure leads to a more efficient and fairer Internet. This document
> motivates the need for congestion exposure and illustrates its
> usefulness in different use cases. Therefore, actions should be taken
> to
> implement a simple form of congestion exposure in the Internet.
> 
> The abstract may also contain a summary of the problem (I don't find
> it's necessary in the abstract) and be placed before the text above:
> 
> The Internet relies on TCP's congestion control algorithm and saved it
> from a major congestion collapse since its adoption. However, TCP is
> applied on a voluntary base and the bandwidth is fairly shared among
> flows instead of users. This is problematic so that ISPs take simple
or
> advanced policing actions on some sorts of traffic. However, since
> congestion on the downstream path of a flow is not visible, these
> approaches possibly hit users unnecessarily and are not effective
> enough.
> 
> 
> Regards,
> 
>     Michael
> 
> [e-mail] schrieb:
> > 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:[e-mail]]
> >> Sent: 23 September 2009 22:41
> >> To: Moncaster,T,Toby,DER3 R
> >> Cc: [e-mail]
> >> 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
> >>
> >> [e-mail] 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.  [phone]
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >
---------------------------------------------------------------------
> >
> >> -
> >>
> >>> --
> >>>
> >>> _______________________________________________
> >>> re-ECN mailing list
> >>> [e-mail]
> >>> 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: [phone] (new), fax: [phone]
> >> mailto:[e-mail]
> >> http://www3.informatik.uni-wuerzburg.de/research/ngn
> >>
> 
> --
> Dr. Michael Menth, Assistant Professor
> University of Wuerzburg, Institute of Computer Science
> Am Hubland, D-97074 Wuerzburg, Germany, room B206
> phone: [phone] (new), fax: [phone]
> mailto:[e-mail]
> http://www3.informatik.uni-wuerzburg.de/research/ngn