Re: [XCON] draft-ietf-xcon-ccmp-02

["Mary Barnes" <mary.barnes at nortel.com>]

Hi Sean,

 

Apologies, as I can't see that anyone ever responded to your question.   Yes, the server would be the one to populate the <available-media> element. Per the XCON framework this is information that would be part of the blueprint. 

 

There is a <mixer-type> for each <user> element that contains the type of media and a <controls> element in the data model that contain basic video and audio controls.  For each <endpoint> there is a <media> element in the data model to capture the source of media(<to-mixer>/<from-mixer>  for a specific endpoint.  These types are all borrowed from RFC 4575, so they are not described in the xcon data-model document.

 

And, there are specific media control elements for floor control. 

 

When a client is joining a conference, the setup of a specific media type would be negotiated between the signaling and media control client (e.g., SIP client) and the focus.  And, something like the mediactrl protocol could be used, which is what is shown in the call flows document:

http://tools.ietf.org/id/draft-barnes-xcon-examples-01.txt

 

Does that answer your question?

 

Regards,

Mary.

 

---

From: xcon-bounces at ietf.org [mailto:xcon-bounces at ietf.org] On Behalf Of Duddy, Sean (Sean)
Sent: Thursday, April 09, 2009 11:55 AM
To: xcon at ietf.org
Subject: [XCON] draft-ietf-xcon-ccmp-02

Hi Folks,

    How does a ccmp client request a specify media type for its conference

(e.g. audio or audio+video or video only)?

 

Th data model has an <available-media> element but only the server has the

information to populate this (http://tools.ietf.org/html/rfc4575#section-5.3.4)

and the definition of this element alone implies what media is available and not

how to request a specific media...

 

Regards

Sean