R: [Sipping-tispan] Re: CCBS/CCNR in Version -02f

[Tessa Silvia <[e-mail]>]

Hi,
Hoping that I've correctly interpreted the whole discussion, I believe that the ccbs service requested by a terminal should be active for every device the calling user is registered to (even if it's no PSTN requirement, I suppose it is reasonable requirement). Moreover, if a user does the following actions, in order:
1) request ccbs
2) unregister
3) registers back from another location...
... should the CCBS service still work for him ? My personal answer is yes, actually this issue seems more important than the previous one.

What I haven't understood from the discussion is the outcome, is it a requirement ?
If so, would it be okay to add/modify a requirement as:

When the service-specific condition related to the callee's state is met,
the CCBS/CCNR service must be able to reach the caller at any of his locations.

Otherwise, forget it :)

Regards
silvia


> -----Messaggio originale-----
> Da: Tom-PT Taylor [mailto:[e-mail]]
> Inviato: giovedì 29 settembre 2005 15.46
> A: GARCIN Sebastien RD-CORE-ISS
> Cc: Elwell, John; Miguel Garcia; Michael Hammer (mhammer); Tessa Silvia;
> [e-mail]
> Oggetto: Re: [Sipping-tispan] Re: CCBS/CCNR in Version -02f
> 
> Paul has already given his response to the substance of John's question,
> but I thought I would try to make it clearer to you.  Suppose the caller
> has multiple devices, say a cell phone and a fixed line, as possible
> contacts, all through the same address of record.  John is asking
> whether the call returned by CCBS must come back to the cell phone if
> that is where the original call came from, or whether any of the devices
> associated with that address of record could receive the return call.
> 
> GARCIN Sebastien RD-CORE-ISS wrote:
> > John,
> >
> > I am not sure I understand your question. I assume you are asking about
> how the O-AS gets the calling party issue the CCBS/CCNR recall or ...?
> >
> > If this is the case, we are studying several possibilities (3rd party
> call, REFER...) in TISPAN but none of them have SIP extension
> requirements.
> >
> > Could you please be more specific as to what requirement you feel needs
> to be captured?
> >
> > sébastien
> >
> >
> >
> > -----Message d'origine-----
> > De : Elwell, John [mailto:[e-mail]]
> > Envoyé : jeudi 29 septembre 2005 14:22
> > À : GARCIN Sebastien RD-CORE-ISS; Miguel Garcia; Michael Hammer
> (mhammer)
> > Cc : Tessa Silvia; [e-mail]
> > Objet : RE: [Sipping-tispan] Re: CCBS/CCNR in Version -02f
> >
> > Sebastien,
> >
> > Irrespective of the need for a service provider on the caller side, what
> is the requirement concerning the call resulting from CCBS/CCNR - should
> it use the same caller UA as that which issued the CCBS/CCNR request, or
> should it use any UA registered as contact for the AoR concerned?
> >
> > John
> >
> >
> >
> >>-----Original Message-----
> >>From: GARCIN Sebastien RD-CORE-ISS
> >>[mailto:[e-mail]]
> >>Sent: 29 September 2005 12:58
> >>To: Elwell, John; Miguel Garcia; Michael Hammer (mhammer)
> >>Cc: Tessa Silvia; [e-mail]
> >>Subject: RE: [Sipping-tispan] Re: CCBS/CCNR in Version -02f
> >>
> >>John,
> >>
> >>Basically it enables "service interactions", "charging model",
> >>"control of subscriber rights to the service", "playing CCBS related
> >>announcement"...Having the service logic embedded in an Application
> >>Server serving the originating user makes all this possible.
> >>
> >>If you want a more detailed to understand the role of the service
> >>provider acting of behalf of the caller, I suggest you read the
> >>related section dealing with the originating exchange in ITU-T Q.733
> >>or contact your Siemens collegues that participate to TISPAN.
> >>
> >>Regards,
> >>sébastien
> >>
> >>
> >>
> >>
> >>-----Message d'origine-----
> >>De : Elwell, John [mailto:[e-mail]] Envoyé : jeudi 29
> >>septembre 2005 13:11 À : GARCIN Sebastien RD-CORE-ISS; Miguel Garcia;
> >>Michael Hammer (mhammer) Cc : Tessa Silvia; [e-mail]
> >>Objet : RE: [Sipping-tispan] Re: CCBS/CCNR in Version -02f
> >>
> >>Sebastien,
> >>
> >>I was not trying to open up an old debate. I was simply continuing the
> >>recent debate about on whose behalf the service provider is acting,
> >>and whether there are two service providers or one. I can see a role
> >>for a service provider acting on behalf of the callee, since it needs
> >>to look out for different UAs registered for the AoR concerned that
> >>might be in a position to satisfy the CCBS/CCNR request. I am not sure
> >>I understand what a service provider acting on behalf of the caller
> >>would do. It would be good to get an answer to my question about
> >>whether a CCBS/CCNR request results in a call from the same UA as that
> >>from which the request was made or any UA registered as contact for
> >>the caller's AoR.
> >>
> >>John
> >>
> >>
> >>
> >>>-----Original Message-----
> >>>From: GARCIN Sebastien RD-CORE-ISS
> >>>[mailto:[e-mail]]
> >>>Sent: 29 September 2005 09:11
> >>>To: Elwell, John; Miguel Garcia; Michael Hammer (mhammer)
> >>>Cc: Tessa Silvia; [e-mail]
> >>>Subject: RE: [Sipping-tispan] Re: CCBS/CCNR in Version -02f
> >>>
> >>>John,
> >>>
> >>>You seems to want try and open the endless debate about where the
> >>>intelligence should be placed in the network or in the
> >>
> >>terminals. The
> >>
> >>>approach you are proposing is not something that TISPAN
> >>
> >>will accept so
> >>
> >>>I suggest that we move out of this debate.
> >>>
> >>>sébastien
> >>>
> >>>
> >>>-----Message d'origine-----
> >>>De : [e-mail]
> >>>[mailto:[e-mail]] De la part de Elwell, John
> >>>Envoyé : jeudi 29 septembre 2005 08:20 À : Miguel Garcia; Michael
> >>>Hammer (mhammer) Cc : Tessa Silvia; [e-mail] Objet :
> >>>RE: [Sipping-tispan] Re: CCBS/CCNR in Version -02f
> >>>
> >>>Miguel,
> >>>
> >>>In-line,
> >>>
> >>>John
> >>>
> >>>
> >>>>-----Original Message-----
> >>>>From: Miguel Garcia [mailto:[e-mail]]
> >>>>Sent: 28 September 2005 10:31
> >>>>To: Michael Hammer (mhammer)
> >>>>Cc: Tessa Silvia; [e-mail]
> >>>>Subject: Re: [Sipping-tispan] Re: CCBS/CCNR in Version -02f
> >>>>
> >>>>Hi Mike:
> >>>>
> >>>>Inline discussion.
> >>>>
> >>>>Michael Hammer (mhammer) wrote:
> >>>>
> >>>>
> >>>>>Miguel,
> >>>>>
> >>>>>I think there is still a little bit of schizophrenia in the
> >>>>>requirements.  I assume that a server is acting on behalf
> >>>>
> >>>>of either the
> >>>>
> >>>>>caller or the callee, but not both because each could be
> >>>
> >>>served by a
> >>>
> >>>>>different host, domain, or organization.  The first
> >>>>
> >>>>requirement seems to
> >>>>
> >>>>>assume that the CCBS is a terminating service of the
> >>>
> >>>callee.  Other
> >>>
> >>>>>requirements seem to assume that the CCBS is a service of
> >>>>
> >>>>the caller.
> >>>>
> >>>>>Which is it?
> >>>>
> >>>>Both. It has been demonstrated that CCBS is a service
> >>
> >>that requires
> >>
> >>>>cooperation of both the originating and terminatine service
> >>>
> >>>providers.
> >>>
> >>>>This cooperation is mostly required to manage queues of both the
> >>>>caller and callee, and to manage susped/resume states.
> >>>
> >>>[JRE] It is not clear to me what the involvement of the originating
> >>>service provider is. Perhaps this comes down to what
> >>
> >>exactly are the
> >>
> >>>requirements for notifying the caller that a call may now
> >>
> >>succeed. Is
> >>
> >>>this notification constrained to go to the same UA that requested
> >>>CCBS/CCNR in the first place, or should it go to any UA currently
> >>>registered as a contact for the caller's AoR? In my opinion
> >>
> >>the former
> >>
> >>>is sufficient and indeed probably preferable. If I request
> >>
> >>CCBS/CCNR
> >>
> >>>from a particular UA I would expect to receive the notification on
> >>>that same UA and make the new call attempt from there. In the
> >>>relatively infrequent event that I move to a different UA in the
> >>>intervening period, I could simply request CCBS/CCNR again from the
> >>>new UA.
> >>>
> >>>So on the assumption that CCBS/CCNR involves only a single
> >>
> >>UA on the
> >>
> >>>caller side, what service does the originating service provider
> >>>perform? Why can't the UA directly request CCBS/CCNR and
> >>
> >>communicate
> >>
> >>>with the service provider on the callee side to achieve this? The
> >>>caller's UA will receive notification when a the call can
> >>
> >>be made and
> >>
> >>>can present that information to the caller somehow, allowing the
> >>>caller to choose when to proceed with that call, e.g., whether to
> >>>interrupt any ongoing communications in order to make that call.
> >>>
> >>>
> >>>_______________________________________________
> >>>Sipping-tispan mailing list
> >>>[e-mail]
> >>>https://www1.ietf.org/mailman/listinfo/sipping-tispan
> >>>
> >>
> >
> > _______________________________________________
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> > [e-mail]
> > https://www1.ietf.org/mailman/listinfo/sipping-tispan
> >
> >



Gruppo Telecom Italia - Direzione e coordinamento di Telecom Italia S.p.A.

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