[e2e] Is a control theoretic approach sound?
agrieco at poliba.it
Sat Aug 2 12:45:54 PDT 2003
I think that without the self-clocking you need to scale the gain of the
controller to achieve stability. On the other hand, if you exploit
the self-clocking, the stability of the system is no more dependent on the
value of the gain.
Scrive "John T. Wen" <wen at cat.rpi.edu>:
> Hi Alfredo:
> Self clocking is modeled as scaling the source controller gain to be
> inversely proportional to the delay. This was done in the linear context by
> Low, Paganini, and Doyle in their various papers on scalable congestion
> control. We have also done this in the nonlinear context to achieve global
> asymptotic stability.
> ----- Original Message -----
> From: Alfredo Grieco
> To: end2end-interest at postel.org
> Cc: Saverio Mascolo ; shivkuma at ecse.rpi.edu ; wen at ecse.rpi.edu ;
> arcak at ecse.rpi.edu
> Sent: Saturday, August 02, 2003 7:04 AM
> Subject: Re: [e2e] Is a control theoretic approach sound?
> Hi all,
> I would like to add one more point to this discussion,
> in particular, I noticed that in many papers on TCP modeling, the
> self-clocking principle, which is at the core of the Internet stability, is
> not explicitly taken into account.
> My question is :
> can we effectively model the Internet without taking into account one of
> the major key points of TCP congestion control ?
> Alfredo Grieco
> Luigi Alfredo Grieco
> DEE Politecnico di Bari,
> Via Orabona 4 - 70125 Bari, Italy
> Tel. +39-080-5963301
> Fax +39-080-5963410
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