Re: [XCON] draft on MSRP conferencing

[Miguel Garcia <Miguel.An.Garcia at nokia.com>]

Adam:

The new DISTSEND method allows to have more than one "recipient target", 
as opposed to the SEND method that assumes a single target.

DISTSEND allows anything in the Distribution header, including but not 
limited to a SIP URI that represents a sidebar. This will allow to send 
a message to a sidebar and some other selected participants.

It is not the intention of the draft to add an alternative mechanism to 
sending MSRP messages to a sidebar, but obviously a sidebar can be a 
potential target of the DISTSEND method as any other participant's URI.

You also mention the sidebar mechanisms that XCON will be developing. 
Unfortunately I haven't found written information about that, perhaps I 
missed it. So I just took into considerations the written stuff about 
sidebars, which is basically in the SIPPING Conferencing Framework, 
indicating that a sidebar is a conference within a conference identified 
by a SIP URI. If there is something else we would need to align let me 
know it.

/Miguel



Adam Roach wrote:

> I'm more than a little confused about the motivation to use a mechanism 
> for sidebars ("DISTSEND") that varies from the sidebar mechanisms that 
> XCON will be developing.
>
> The key benefit of session-oriented media that I have been selling 
> people on is that it is treated identically to that of other media (e.g. 
> voice and video). Once you start defining alternate or multiple ways to 
> do things, such as sidebars, then this benefit starts to disintegrate.
>
> /a
>
> Miguel Garcia wrote:
>
> > Hi:
> >
> > Aki and me had made a new revision of a draft that discusses how to do 
> > conferences with MSRP. We propose to define a new MSRP method and a 
> > couple of new headers, in addition to a number of conventions.
> >
> > Although the draft is intended to reach the SIMPLE mailing list, due 
> > to the proposed extensions to MSRP, the subject also falls in the 
> > scope of XCON, and we would be happy to discuss it here as well.
> >
> > The draft should be officially published soon. In the meantime you can 
> > download a copy from (html and txt):
> >
> > http://people.nokia.net/~miguel/drafts/draft-niemi-simple-chat-02.html
> > http://people.nokia.net/~miguel/drafts/draft-niemi-simple-chat-02.txt
> >
> > Comments are welcome.
> >
> > - Miguel

--
Miguel A. Garcia           tel:+358-50-4804586
Nokia Research Center      Helsinki, Finland

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