Re: [re-ECN] FW: New Version Notification for draft-moncaster-congestion-exposure-problem-02

Hi,

I think the problem statement should be shorten a little as a lot of things 
are mentioned twice and the introduction doesn't come clearly to the point. 
Not sure if someone not involved into the re-ECN activity will be able to 
grab the problem in some simple sentences after reading this. 
Generally, I think it is really good readable, so simply shorten it might 
help...?

Here is some input from my side for the use cases. Not sure if that is what is 
was intended to be, but at least it's some input:

"Congestion exposure can enable ISPs to give an incentive to end-systems to 
response to congestion in a way that leads to a better share of the available 
capacity. For example the introduction of a per-user congestion volume might 
motivate "heavy-user" to back off with their high-bandwidth traffic (when 
congestion occurs) to save their congestion volume for more time-critical 
traffic. If every end-system reacts to congestion in such a way that it 
avoids congestion for non-critical traffic and allow a certain level of 
congestion for the more important traffic (from the user's point of view), 
the all-over user experience will be increased. More-over the network might 
be utilized more equally when less-important traffic is shifted to less 
congested time slots."

Mirja

On Friday 23 October 2009 15:09:30 toby.moncaster@bt.com wrote:
> I have posted an updated version taking into account comments I received
> over the past week or so. Apologies if I have missed any comments.
>
> http://www.ietf.org/id/draft-moncaster-congestion-exposure-problem-02.txt
>
> The big missing pieces still are: use cases (I have added a couple of
> sentences suggesting what the end result should look like) and security
> (which Bob is hoping to be able to do - meanwhile I added some rough notes
> that I hope are a start).
>
> If anyone has anything to contribute before the ID deadline on Monday let
> me have it by 1200 GMT Monday and I will endeavour to add it...
>
> Toby
>
> ____________________________________________________________________
> Toby Moncaster, Senior Researcher, Network Infrastructure Practice
> B54/70 Adastral Park, Ipswich, IP53RE, UK.  +44 7918 901170
>
>
>
> -----Original Message-----
> From: IETF I-D Submission Tool [mailto:idsubmission@ietf.org]
> Sent: 23 October 2009 13:30
> To: Moncaster,T,Toby,DEE1 R
> Cc: Krug,AL,Louise,DES3 R; menth@informatik.uni-wuerzburg.de;
> j.araujo@ee.ucl.ac.uk; sblake@extremenetworks.com;
> richard_woundy@cable.comcast.com Subject: New Version Notification for
> draft-moncaster-congestion-exposure-problem-02
>
>
> A new version of I-D, draft-moncaster-congestion-exposure-problem-02.txt
> has been successfuly submitted by T Moncaster and posted to the IETF
> repository.
>
> Filename:	 draft-moncaster-congestion-exposure-problem
> Revision:	 02
> Title:		 The Need for Congestion Exposure in the Internet
> Creation_date:	 2009-10-23
> WG ID:		 Independent Submission
> Number_of_pages: 19
>
> Abstract:
> The success of the Internet is largely down to the ability to share
> capacity amongst all users while avoiding congestion collapse.
> However this relies on the cooperation of all end users to work
> efficiently - even if everyone uses TCP, a minority of users can
> command a large share of the network.  To mitigate the growth in this
> problem over recent years, some ISPs have imposed various controls on
> traffic using a range of proprietary approaches.  These controls set
> ISPs in conflict with their customers and with some regulators.
>
> The root of the problem lies in the fact the ISPs are unable to see
> the most important information about the traffic - namely the amount
> of congestion that traffic is going to cause in the network.  We
> propose congestion exposure as a possible solution.  This allows
> packets to carry an accurate prediction of the congestion they expect
> to cause downstream.  This memo sets out the motivations for
> congestion exposure and introduces a strawman protocol designed to
> achieve congestion exposure.
>
>
>
> The IETF Secretariat.
>
>
> _______________________________________________
> re-ECN mailing list
> re-ECN@ietf.org
> https://www.ietf.org/mailman/listinfo/re-ecn

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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
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