Subject: RE: [Simple] Re: Presence Data Model: Overriding services (tuples )

From: "Drage, Keith (Keith)" <[email-masked]>
Date: Wed, 13 Oct 2004 08:28:42 +0100

See below:

> -----Original Message-----
> From: Jonathan Rosenberg [mailto:[email-masked]]
> Sent: 11 October 2004 21:35
> To: [email-masked]
> Cc: [email-masked]
> Subject: [Simple] Re: Presence Data Model: Overriding 
> services (tuples)
> 
> 
> 
> 
> [email-masked] wrote:
> 
> > Hi all,
> > 
> > I have some questions on the overriding functionality described in
> > presence data model draft chapters 6.2 and 7.2.2. The draft says:
> > 
> > Indeed, a client might explicitly choose to publish with the same
> > service URI as another client, if its goal is to explicitly override
> > the service of the other.  Using the same service ID is the 
> "hint" to
> > the presence server that conflicting data exists, and one 
> needs to be
> > chosen.
> > 
> > The assumption in the draft is that each SIP service is represented
> > by a contact that is GRUU. Assuming an event package whereby a PUA
> > can learn about publications of other PUAs before any composition
> > happens, this is a good model since it gives an unique 
> handle to each
> > service, and allows PUAs to really do explicit overrides.
> > 
> > However, my concern is that there are currently many SIP presence
> > systems being worked on which do not support GRUU generation. One
> > example is 3GPP Release 6 IMS. In those systems the SIP service
> > contact address is supposed to be the AoR.
> 
> Is it too late to change this in R6?
> 
>
No and Yes.

Deadline for 3GPP release 6 is now December 3GPP plenaries (at start of December), already deferred from September.

The 3GPP Presence service merely applies IETF Presence to IMS functional entities and makes no other enhancements, other than those that are already being progressed through IETF. Therefore if IETF agree the change then they will fairly automatically transfer to the 3GPP usage.

However, if such changes require two or three more rounds of discussion, then this is obviously going to take more time than we have available. Can you have all the required documents available in IESG approved form by end November?

<Remainder snipped> 

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