Re: [Sip] Comparison of retargeting proposals

["Francois Audet" <audet at nortel.com>]

What a mess.... I pitty the poor implementors who will have to implement this.

In any case, my preference is:

- An history-info-bis, with EXPLICIT history-info parameters that identify
  which entry is a Target and which one is the contact (from re-route). 
  That way you wouldn't need artificial intelligence to parse the history-info.
  Also, we would sort-out all the bugs in history info.

I can also deal with a new header, IF AND ONLY IF we also have a document that
described the accurately and without any ambivalence the different between
P-Called-Header and Target, AND if we still up-issue History-info to describe
how it works with this new header (and how history-info tracks everything).




> -----Original Message-----
> From: Paul Kyzivat [mailto:pkyzivat at cisco.com] 
> Sent: Thursday, April 03, 2008 14:46
> To: Audet, Francois (SC100:3055)
> Cc: Christer Holmberg; Hans Erik van Elburg; Juha Heinanen; 
> sip at ietf.org; DOLLY, MARTIN C, ATTLABS
> Subject: Re: [Sip] Comparison of retargeting proposals
> 
> Francois,
> 
> IMS has the notion of implicit registration, so when you register for
> AOR1 you may implicitly be registered for AOR2 and AOR3 as 
> well. (Using the same Contact URI.)
> 
> So, when you subsequently receive an incoming request at your 
> Contact URI, you can't tell from the Contact address which of 
> the AORs was the target of the request. The P-Called-Party-ID 
> allows you to figure that out, and therefore light up the 
> proper line, or whatever, on your phone.
> 
> 	Paul
> 
> Francois Audet wrote:
> > So what is the P-Called-Party-ID used for?
> > 
> > I'm trying to figure out the different use cases for 
> P-Called-Party-ID 
> > versus Target.
> > 
> >> -----Original Message-----
> >> From: Christer Holmberg [mailto:christer.holmberg at ericsson.com]
> >> Sent: Thursday, April 03, 2008 13:48
> >> To: Audet, Francois (SC100:3055); Hans Erik van Elburg; 
> Juha Heinanen
> >> Cc: sip at ietf.org; DOLLY, MARTIN C, ATTLABS
> >> Subject: RE: [Sip] Comparison of retargeting proposals
> >>
> >>
> >> Hi,
> >>
> >> The P-Called-Party-ID is only inserted by the registrar of 
> the UAS, 
> >> while the Target can be inserted also by other entities.
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> > sipping at ietf.org for new developments on the application of sip
> > 
> 
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