Re: [sixpac] Capability and preference expression and interrogation
Gunnar Hellström <gunnar.hellstrom@omnitor.se> Mon, 07 March 2011 07:39 UTC
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Date: Mon, 07 Mar 2011 08:40:52 +0100
From: Gunnar Hellström <gunnar.hellstrom@omnitor.se>
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Subject: Re: [sixpac] Capability and preference expression and interrogation
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The requirement to express the capability of XMPP messaging in SIP described below also may need an extension for declaration of capability details. REQ-y: Negotiable features in XMPP must be possible to express and interrogate at SIP Session establishment level. Use case: Alice want to send a nice HTML-formatted invitation letter to Bob. She wonders if she can do it in a SIP session with messaging enabled. Therefore, when she calls Bob, she indicates a desire to use Rich formatted messages. The resonse shows that Bob has no capability for such features, so Alice decides to send an e-mail instead and discuss it in a plain vice phone call. Gunnar ------------------------------------- Gunnar Hellström skrev 2011-02-08 20:16: > I think it is important that the capability to do XMPP messaging with > a SIP endpoint is expressed in regular SIP ways, so that capability > checking for that function even can be done before a session is > initiated, and also during session initiation. E.g. the functionality > should have the possibility to influence the outcome of caller > preferences - callee capabilities interrogations (RFC 3840, RFC 3841 ). > > It seems to me that that is easily achieved, but that is not the issue > at the moment, when collecting requirements. > I cannot find exactly that need described in the current requirements, > so I suggest to add a requirement like this: > > REQ-x: The capability or preference to initiate and accept XMPP > messages must be possible to express and interrogate by the standard > mechanisms for such functions in SIP for caller preferences and callee > capabilities. ( RFC 3840, RFC 3841 etc.) > > Use case: Alice want to call Bob to have his view of some new poems > she has written. She has a SIP phone with XMPP chat addition. She > makes sure that her phone expresses a preference for audio and text > messaging in the call. Bob has two phones registered on his address. > One only with audio functionality, the other with both audio and text > messaging. The SIP server can match the Alice's preferences with the > capabilities of Bob's phones, and direct the call to the device where > he can receive and read the poems and comment them in their voice > conversation. > > --- > > I am not sure if similar standardised features are available for XMPP > so that it is relevant to express the symmetric requirements on the > XMPP side. > > Gunnar > > ______________________________________________________________________________-- > > Simo.Veikkolainen@nokia.com skrev 2011-01-26 21:20: >> You're right, we should get some discussion going on. >> >> I have just uploaded a new version of >> draft-veikkolainen-sip-xmpp-coex-reqs, which can be found at >> http://www.ietf.org/internet-drafts/draft-veikkolainen-sip-xmpp-coex-reqs-02.txt >> >> The changes in this version address the comments made by Peter >> Musgrave (mainly clarifications): >> >> In REQ-1: “SIP contact” changed to “SIP address” >> >> In REQ-3: "It must be possible to include SIP real-time media related >> contact and status in XMPP presence information." changed to "It must >> be possible to include SIP address and status information in XMPP >> presence." >> >> And a couple of typos. >> >> One further comment made by Peter might merit a bit more discussion, >> namely saying something about cases where two SIP devices are >> registered to the same AOR and two XMPP clients are logged in. This >> is related to the discussion we had an correlation, and whether or >> not it should be mentioned in the charter or not. >> >> Opinions on this would be helpful. >> >> Also, please take a fresh look at the draft and express your opinions >> on whether the approach in general makes sense, do you agree with the >> use cases and requirements, is something missing etc. >> >> Thanks >> Simo >> >> >> -----Original Message----- >> From: ext IETF I-D Submission Tool [mailto:idsubmission@ietf.org] >> Sent: 26 January, 2011 22:05 >> To: Veikkolainen Simo (Nokia-MS/Helsinki) >> Cc: Isomaki Markus (Nokia-CIC/Espoo) >> Subject: New Version Notification for >> draft-veikkolainen-sip-xmpp-coex-reqs-02 >> >> >> A new version of I-D, draft-veikkolainen-sip-xmpp-coex-reqs-02.txt >> has been successfully submitted by Simo Veikkolainen and posted to >> the IETF repository. >> >> Filename: draft-veikkolainen-sip-xmpp-coex-reqs >> Revision: 02 >> Title: Requirements and Use Cases for Combining SIP Based >> Real-time Media Sessions With XMPP Based Instant Messaging and >> Presence Service. >> Creation_date: 2011-01-26 >> WG ID: Independent Submission >> Number_of_pages: 8 >> >> Abstract: >> This memo defines use cases and requirements for combining Session >> Initiation Protocol (SIP) based real-time media sessions with >> Extensible Messaging and Presence Protocol (XMPP) based instant >> messaging and presence services in a seamless manner. >> >> >> >> The IETF Secretariat. >> >> >> _______________________________________________ >> sixpac mailing list >> sixpac@ietf.org >> https://www.ietf.org/mailman/listinfo/sixpac > _______________________________________________ > sixpac mailing list > sixpac@ietf.org > https://www.ietf.org/mailman/listinfo/sixpac
- [sixpac] FW: New Version Notification for draft-v… Simo.Veikkolainen
- Re: [sixpac] FW: New Version Notification for dra… Elwell, John
- Re: [sixpac] FW: New Version Notification for dra… Simo.Veikkolainen
- Re: [sixpac] FW: New Version Notification for dra… Markus.Isomaki
- Re: [sixpac] FW: New Version Notification for dra… Markus.Isomaki
- [sixpac] Resolving SIP/XMPP URIs Markus.Isomaki
- Re: [sixpac] Resolving SIP/XMPP URIs Elwell, John
- Re: [sixpac] Resolving SIP/XMPP URIs Emil Ivov
- Re: [sixpac] Resolving SIP/XMPP URIs Simo.Veikkolainen
- Re: [sixpac] Resolving SIP/XMPP URIs Elwell, John
- [sixpac] Capability and preference expression and… Gunnar Hellström
- Re: [sixpac] FW: New Version Notification for dra… Elwell, John
- Re: [sixpac] Capability and preference expression… Gunnar Hellström
- Re: [sixpac] Capability and preference expression… Joe Hildebrand
- Re: [sixpac] Capability and preference expression… Simo.Veikkolainen
- Re: [sixpac] Capability and preference expression… Gunnar Hellström
- Re: [sixpac] Capability and preference expression… Simo.Veikkolainen
- Re: [sixpac] Capability and preference expression… Gunnar Hellström