[e2e] link between Kelly's control and TCP's AIMD

[Cannara]

Well, only 15 years of modest network consulting for over 1000 modest
companies from GM on down.  :]

Have VJ estimate how much delay is incurred by any current TCP under 1% random
packet loss; then 0.1%.  Or, have him or anyone else, itemize the differences
among TCPs deployed by, say, the top 10 systems vendors.

There've been many archived discussions of how TCP does & doesn't work as well
as it should, given all the years that have passed, in which continued
protocol development could have, but did not, occur.  Thus the Internet -- a
study in insecurity, capacity co-option, performance mediocrity, engineering
bureaucracy...  But, that's not what folks want to hear.  Which is why the
mediocrity continues and those of us in consulting & security have good jobs &
good profits.  :]

Alex 

Saverio Mascolo wrote:
> 
> why do you think TCP congestion control is  not linear? I tend to agree with
> Van Jacobson when syas that a network is to a large extend  a linear system
> made of integrators, delays and gains.
> 
> Saverio
> 
> ----- Original Message -----
> From: "Cannara" <cannara at attglobal.net>
> To: <end2end-interest at postel.org>
> Sent: Friday, February 18, 2005 6:12 AM
> Subject: Re: [e2e] link between Kelly's control and TCP's AIMD
> 
> > And, without understanding/modelling TCP's nonlinear behaviors, it will
> only
> > serve for gross predictions.
> >
> > Alex
> >
> > Ted Faber wrote:
> > >
> > > On Thu, Feb 17, 2005 at 01:31:08AM +0000, Damon Wischik wrote:
> > > >
> > > > Roy Xu wrote:
> > > > >I'm looking for a pointer to literatures that link the
> > > > >TCP's (discrete) AIMD to Kelly's (continuous) control formulation.
> > > >
> > > > Kelly's continuous-time formulation uses a differential equation model
> > > > (also called a fluid model) for TCP. You should look at the literature
> > > > which describes this fluid model, starting with
> > > >
> > > > "A Fluid-based Analysis of a Network of AQM Routers Supporting TCP
> Flows
> > > > with an Application to RED", V. Misra, W. Gong, D. Towsley, SIGCOMM
> 2000.
> > >
> > > Fluid flow congestion control analysis goes beck to these guys at least:
> > >
> > > %A D. Mitra
> > > %A T. Seery
> > > %T Dynamic Adaptive Windows for High Speed Data Networks: Theory and
> > > %Simulation
> > > %J Proc. SIGCOMM Symposium on Communications Architectures and Protocols
> > > %P 30-29
> > > %I ACM SIGCOMM
> > > %C Philadelphia, PA
> > > %D Sept 24-27, 1990
> > >