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[dispatch] Charter proposal on combining SIP voice with XMPP IM and presence

<Simo.Veikkolainen@nokia.com> Mon, 21 September 2009 12:27 UTC

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From: Simo.Veikkolainen@nokia.com
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Date: Mon, 21 Sep 2009 14:28:43 +0200
Thread-Topic: Charter proposal on combining SIP voice with XMPP IM and presence
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Subject: [dispatch] Charter proposal on combining SIP voice with XMPP IM and presence
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Hello,

Below is the draft charter text for our proposal on combining SIP voice with XMPP IM and presence.

Comments are very welcome!

Regards,
Simo


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Combining SIP VoIP and XMPP IM/Presence
=======================================

Currently most standards-based Voice over IP (VoIP) deployments use the Session Initiation Protocol (SIP).  In addition to providing basic voice service SIP has an extensive support for more advanced telephony features including interworking with the traditional Public Switched Telephone Network (PSTN).  SIP is also gaining popularity in the field of video communication. At the same time, the Extensible Messaging and Presence Protocol (XMPP) is enjoying widespread usage in instant messaging and presence services.  

Both SIP and XMPP offer extensions for voice as well as IM and presence (XMPP voice via the Jingle extension, and SIP IM/presence via SIMPLE protocols). However, widespread deployment of these extensions has not so far taken place. In order to speed up deployment of integrated VoIP and IM systems, SIP based voice and XMPP based IM/Presence could be combined in endpoints to offer a voice, IM and presence service without any changes to existing SIP and XMPP service infrastrucure. 

The objective of this Working Group is to develop solutions for combining SIP based voice with XMPP based IM and Presence such that a unified user experience can be offered to end user. Specifically, solutions are needed on 
- addressing; end users should be able to initiate sessions to a user identity in either SIP or XMPP domain. The corresponding user identity in the other protocol domain needs to be learned automatically.
- session correlation; endpoints need to be able to correlate voice sessions with IM/Presence such that they can be presented to the end user in a seamless fashion
- presence; it should be possible to change the XMPP presence status based on the user's activity in the SIP domain.

The goal is to rely on existing service infrastructre, and new requirements should be imposed only to the endpoint. 

Protocol interworking, that is, translation from one protocol to another, is out of scope of this WG.

Milestones
Feb 2010 Problem statement and use cases submitted to IESG as Informational
Dec 2010 Specification on combining SIP based voice and XMPP based IM/Presence in a seamless manner submitted to IESG as Proposed Standard.

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