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DesignXMPP presence

Version 2 (Saúl Ibarra Corretgé, 05/31/2012 11:09 am)

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h1. SIP-XMPP Presence
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XMPP defines 2 ways for exchanging presence information: simple presence and rich presence.






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* Simple presence: The _presence_ stanza is used and it conveys basic information about the user's availability, such as the status, availability note and a timestamp indicating the last time it was seen.






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* Rich presence: _IQ_ stanzas are used and it enhances the simple presence by adding information such as the user avatar, music the user is listening to, etc.






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SIP, on the contrary, defines a single framework for presence (SIMPLE) and then multiple extensions have been published which extend the information that can be conveyed in the payload.






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The current implementation acts as a gateway just for XMPP simple presence, support for rich presence will be added at a later stage.






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The mechanisms described here follow the currently available specifications for SIP-XMPP interoperability:






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* http://xmpp.org/internet-drafts/attic/draft-saintandre-sip-xmpp-presence-02.html






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h3. Model differences






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TODO






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h3. SIP-XMPP translation






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TODO






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h3. XMPP-SIP translation






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TODO