Re: [dispatch] Disaggregated Media in SIP

Henry Sinnreich wrote:
>>We've looked at various approaches to solve this important
>>problem several times before
> 
> Actually there is one more: IM-ing a URI to some resource, mentioned by 
> Henning Schulzrinne (I don’t recall the document or presentation).
> 
> My two cents is that IM-ing a URL is the most general solution, or is it?

Past suggestions by various people to send control signals (intended to 
be acted upon by automata rather than people) via IM have generally been 
rejected as inappropriate. (The exception so far has been file transfer, 
which has some control behavior and some expected human interaction.)

Now if you just want to say "Bob, please make a video call to 
sip:alice_camera@alice.com in order to see me" then I guess IM is ok. 
But IMO its not otherwise good. Its just a hack.

	Thanks,
	Paul

> Henry
> 
> 
> On 7/6/09 12:07 PM, "Francois Audet" <audet@nortel.com> wrote:
> 
>     I'm glad to see this topic coming back.
> 
>     I see that this draft doesn't propose a solution to problem: it list
>     three options, and describes why they are not adequate. I agree with
>     the conclusions.
> 
>     We've looked at various approaches to solve this important problem
>     several times before:
> 
>     - Feature ref (refer to urn: indicating specific features)
>       http://tools.ietf.org/html/draft-audet-sipping-feature-ref-00
> 
>     - Remote control using REFER to requests & responses
>       http://tools.ietf.org/html/draft-mahy-sip-remote-cc-05
>       (Also, versions -04, -03,-02, -00)
> 
>     - Remore control using REFER with XML body describing function
>       http://tools.ietf.org/html/draft-mahy-sip-remote-cc-01
> 
>     - Remote control using MBUS
>       http://tools.ietf.org/html/draft-mahy-mmusic-mbus-remotecc-01 &
>       http://tools.ietf.org/html/draft-mahy-mmusic-mbus-sdp-01
> 
>     On top of that there are various proprietary mechanisms, and even
>     some legacy
>     PBX-CTI protocols.
> 
>     >  -----Original Message-----
>     >  From: dispatch-bounces@ietf.org
>     >  [mailto:dispatch-bounces@ietf.org] On Behalf Of Salvatore Loreto
>     >  Sent: Monday, July 06, 2009 09:33
>     >  To: dispatch@ietf.org
>     >  Subject: [dispatch] Disaggregated Media in SIP
>     >
>     >  Hi there,
>     >
>     >  I have just submitted a draft that talks of Disaggregated
>     >  Media in the Session Initiation Protocol (SIP).
>     >  http://www.ietf.org/internet-drafts/draft-loreto-dispatch-disa
>     ggregated-media-00.txt
>     >
>     >
>     >  Abstract:
>     >  Disaggregated media refers to the ability for a user to create a
>     >  multimedia session combining different media streams, coming from
>     >  different devices under his or her control, so that they are
>     >  treated by
>     >  the far end of the session as a single media session.
>     >  This document lists several use cases that involve
>     >  disaggregated media
>     >  in SIP.
>     >  Additionally, this document analyzes what types of
>     >  disaggregated media
>     >  can be implemented using existing protocol
>     >  mechanisms, and the pros and cons of using each of those mechanisms.
>     >  Finally, this document describes scenarios that are not covered by
>     >  current mechanisms
>     >  and proposes new IETF work to cover them.
>     >
>     >
>     >  cheers
>     >  Sal
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