Re: [conex] Expiration of credits

Hi Toby,

I guess a cap is even more complicated. An expiration would somehow depend on 
RTT but the num of credit you want to send (at once) depend on the congestion 
control mechanism in the endsystem. If I increase the cwnd by 100 packet in 
one RTT I might want to send 100 credits (expect there are still some unused 
sitting in the audit device from a previous RTT).

Mirja

On Wednesday 26 October 2011 11:01:14 Toby Moncaster wrote:
> My view would be that the credits would remain valid for the duration of
> the connection, but there would be a cap on how much credit you could have
> (at most a few packets-worth).
>
> Toby
>
> On 26 Oct 2011, at 09:48, Mirja Kühlewind wrote:
> > Hi list,
> >
> > one more question, we need to answer for the TCP modifications draft:
> >
> > In the draft we propose a way how to use the credits bits in Slow Start.
> > We assume that the credits are valid for a couple of RTTs. But I assume
> > that those credits should not be valid for ever, as otherwise I could
> > just send credits whenever I have 'congestion volume tokens' available
> > and not care about any conex markings later on. I believe we want to
> > avoid this case. But I don't think that any kind of expiration of the
> > credits bit is addressed yet (in the abstract mechanism draft)...?
> >
> > Mirja
> >
> >
> > _______________________________________________
> > conex mailing list
> > conex@ietf.org
> > https://www.ietf.org/mailman/listinfo/conex

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Dipl.-Ing. Mirja Kühlewind
Institute of Communication Networks and Computer Engineering (IKR)
University of Stuttgart, Germany
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email: mirja.kuehlewind@ikr.uni-stuttgart.de
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