Carlos Alberto Kamienski wrote:
>
> > What is interesting is that we found the need to have pre-defined
> > SLSs (we called it "Network Services" but the name can be misleading):
> > for ease of negotiation and implementation only a subset
> > of parameters can be specified, while the others are given by default
> > with reference to a small set of "well known services".
> > This is in perfect agreement with your idea that a well-known service
> > identifer is just a compression of the SLS for ease of negotiation.
>
> Well-known services do negotiation easier, but I don't think they would
> be just a compression of the SLS. I do not think an SLS will be always
> sufficient.
>
> A quantitative well-known services would be a mix of:
>
> - explanation in a human language (eg, English)
In my opinion, this is only the human understandable version of the SLS.
> - mathematics
> - definition of parameters and possibly limit values for them
That is exactly in the SLS. The question is what parameters are included
in order to define various services.
>
> My point is that one domain may not be able to figure out
> services that other domains are willing to negociate just by observing
> parameters in the SLS. I cannot give many examples, but the Virtual
> Wire (VW) PDB is a good one! How could one domain know that one SLS
> refers to VW and not to other different service (maybe not so
> strict) using EF PHB ?
If the values of parameters in the SLS are such that a VW service is
requested, it does not matter, how the ISP is granting the service.
Whether he uses EF, or some other PHB its up the service provider.
Marcus
> Other examples are Intserv "Guaranteed Service" and "Controlled Load"
>
> Regards
>
> Carlos
>
> >
> > We plan to send a contribution to this discussion with a draft
> > document in a short time (one or two weeks) to present our approach.
> >
> > Best regards,
> > Stefano
> >
> > --
> > *******************************************************************
> > Stefano Salsano
> > CoRiTeL - Consorzio di Ricerca sulle Telecomunicazioni
> >
> > E-mail : salsano@coritel.it URL : http://www.coritel.it
> > Tel. : +39 06 20410029 Address : Via di Tor Vergata, 135
> > Fax. : +39 06 20410037 00133 Roma - ITALY
> > *******************************************************************
> >
--Dr. Marcus Brunner C&C Research Laboratories NEC Europe Ltd.
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