Re: [MEDIACTRL] I-D ACTION:draft-ietf-mediactrl-architecture-01.txt

[Lorenzo Miniero <[e-mail]>]

Reading it again, I think I have a comment upon the conferencing section 
I contributed to. The 6.2 paragraph is probably incorrect by stating 
that the 3PCC mechanism alone is always used to add participants to a 
conference. While it may be right in other cases, in MediaCtrl the 
proper way to do such is probably doing the following:

	1. the AS uses 3PCC to attach a UAC to the MS, as always;
	2. the AS uses other means (e.g. the conferencing package) to actually 
join the newly created UAC media leg(s) to a conference when it 
needs/wants to.

This also allows subsequent and/or previous manipulation of the leg in 
other contexts, without explicitely binding it to a conferencing 
scenario as the paragraph suggests. By saying 'other contexts' I'm 
thinking for instance to IVR menus that take place before the join of a 
conference, as prompting for a PIN and so on, or having the join to a 
conference only as one of the possible branches of an IVR menu, and so 
on. Of course, this also means that between the AS and the MS it is not 
important which SIP URI is used (as it is instead between the UAC and 
the AS, since it selects the service to provide), considering that the 
join to a specific conference is accomplished through the control 
channel and not using the URI itself.

I think this may need to be reflected in the draft. About the rest, my 
opinion is that the draft is fine the way it is.

Lorenzo
	

[e-mail] ha scritto:
> A New Internet-Draft is available from the on-line Internet-Drafts 
> directories.
> This draft is a work item of the Media Server Control Working Group of the IETF.
> 
> 	Title		: An Architectural Framework for Media  Server Control
> 	Author(s)	: T. Melanchuk
> 	Filename	: draft-ietf-mediactrl-architecture-01.txt
> 	Pages		: 29
> 	Date		: 2007-11-20
> 	
> This document describes an Architectural Framework for Media Server
>    Control.  The primary focus will be to define logical entities that
>    exist within the context of Media Server control, and define the
>    appropriate naming conventions and interactions between them.
> 
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