RE: IETF54- Informal discussion on BC Model for DS-TE

["Ash, Gerald R (Jerry), ALASO" <gash@att.com>]

Hi Francois,

> > > > It is possible to achieve (i) and (ii) *without* using preemption (you
> > > > don't have to 'sacrifice' anything).  For example, use of dynamic
> > > > bandwidth reservation together with maximum allocation is one approach
> > > > (such a 'BC model' has been used in large-scale applications for many years).

> > > Could you detail this BC model?

> > It's described already in 
> > http://www.ietf.org/internet-drafts/draft-ietf-tewg-qos-routing-04.txt. 
> > More specifically, see Section 3.4.2 of ANNEX 3 (PDF version at 
> > http://www.research.att.com/~jrex/jerry/annex3-tewg-qos-routing-04.txt.pdf). 
> > See also Section 3.3 for the description of dynamic bandwidth reservation 
> > and Section 3.9 for modeling results showing the effectiveness of the method.
> >
> > I'll plan to write a short I-D focusing on the maximum allocation with 
> > reservation (MAR) BC model

> Do you still expect to publish such an I-D?

Yes I do

> Any idea when it is likely to come out?

As soon as possible before the OO cutoff date.

> PS: the description you refer to above is done in a very different context 
> with different concepts/terminology which makes it difficult (for me at 
> least) to see how exactly it applies to the context of DS-TE. I assume the 
> I-D would extract the relevant concepts and describe them in the DS-TE 
> context. Right?

Yes, the I-D will pull out the relevant concepts and show how they apply to the MAR BC model, in order to achieve objectives -iii-, -iv-, and -v- (current numbers from your email yesterday) without preemption.

Thanks,
Regards,
Jerry