“” How much richer would it be if the network... extract more useful 'state' information about the device
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“” How much richer would it be if the network could extract more useful 'state' information about the device and/or user, especially if it is enriched with embedded sensors... "phone on charge", "user is on a Bluetooth headset", "battery low", "at location xyz", "moving in a way that looks like it's on train", "in a darkened room" and so on.... . “” Dean Bubley 2008 XMPP - Extensible Real-Time Services Research Seminar for Dept. Communications and Networking (TKK) Matti Vesterinen 11.1.2008 Public presentation 2 © Nokia Siemens Networks XMPP / Matti Vesterinen / 11.1.2008 Note: Slide notes contain more info! agenda Protocol basics History, standardisation & current implementations Extensible Messaging and Presence Protocol Near future Potential Other protocols Q&A Public presentation 3 © Nokia Siemens Networks XMPP / Matti Vesterinen / 11.1.2008 XML stream <stream> stanza <presence> <show/> </presence> <message to='foo'> <body/> </message> <iq to='bar'> <query/> </iq> [ ... ] </stream> Public presentation 4 © Nokia Siemens Networks XMPP / Matti Vesterinen / 11.1.2008 open stream <?xml version='1.0'?> <stream:stream from='juliet@example.com' to='example.com' version='1.0' xml:lang='en' xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams'> <?xml version='1.0'?> <stream:stream from='example.com' id='++TR84Sm6A3hnt3Q065SnAbbk3Y=' to='juliet@example.com' version='1.0' xml:lang='en' xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams'> Public presentation 5 © Nokia Siemens Networks XMPP / Matti Vesterinen / 11.1.2008 Client initiates a stream to server Server response […] Public presentation 6 © Nokia Siemens Networks XMPP / Matti Vesterinen / 11.1.2008 close stream </stream:stream> Either entity may close the stream </stream:stream> Other entity will reply Public presentation 7 © Nokia Siemens Networks XMPP / Matti Vesterinen / 11.1.2008 <presence/> initial presence Public presentation 8 © Nokia Siemens Networks XMPP / Matti Vesterinen / 11.1.2008 I’m now available presence <presence> <show>away</show> </presence> Client updates presence to away <presence from='juliet@example.com/balcony' to='romeo@example.net'> <show>away</show> </presence> Public presentation 9 © Nokia Siemens Networks XMPP / Matti Vesterinen / 11.1.2008 Contact receives the update iq:roster <iq from='juliet@example.com/balcony' type='get‘ id='roster_1'> <query xmlns='jabber:iq:roster'/> </iq> Client queries for roster <iq to='juliet@example.com/balcony‘ type='result' id='roster_1'> <query xmlns='jabber:iq:roster'> <item jid='romeo@example.net‘ name='Romeo' subscription='both'> <group>Friends</group> </item> <item jid='mercutio@example.org' name='Mercutio' subscription='from'/> </query> </iq> Server returns user’s roster Public presentation 10 © Nokia Siemens Networks XMPP / Matti Vesterinen / 11.1.2008 <message from='juliet@example.com/balcony' to='romeo@example.net' type='chat' xml:lang='en'> <body>How do you do ?</body> </message> Public presentation 11 © Nokia Siemens Networks XMPP / Matti Vesterinen / 11.1.2008 Public presentation 12 © Nokia Siemens Networks XMPP / Matti Vesterinen / 11.1.2008 Public presentation 13 © Nokia Siemens Networks XMPP / Matti Vesterinen / 11.1.2008 not just presence & IM “” There are mission-critical XMPP deployments at most Wall Street banks, numerous major corporations, high-profile agencies of the U.S. federal government, and countless universities and small businesses worldwide. And the percentage of those organizations participating in the process of standardizing XMPP extensions continues to grow significantly, including contributions regarding voice and video integration from Google and on real-time language translation from the U.S. Department of Defense. “” Peter Saint-Andre, January 2007 Public presentation 14 © Nokia Siemens Networks XMPP / Matti Vesterinen / 11.1.2008 Public presentation 15 © Nokia Siemens Networks XMPP / Matti Vesterinen / 11.1.2008 session vs. session initiation Public presentation 16 © Nokia Siemens Networks XMPP / Matti Vesterinen / 11.1.2008 extensibility – scalability Protocol XMPP Extension Protocols (XEPs): publish-subscribe, multi-user chat, chat rooms, multimedia sessions (Jingle), link-local messaging, … Services Server components Service discovery Servers Clustering a common solution but not part of XMPP Server components help as well Public presentation 17 © Nokia Siemens Networks XMPP / Matti Vesterinen / 11.1.2008 near future potential real-time protocol for Internet Public presentation 18 © Nokia Siemens Networks XMPP / Matti Vesterinen / 11.1.2008 IETF meetings potential in mobile / Internet XMPP is a protocol that can deliver what Dean Bubley descriped in his 2008 prediction (1st slide) Contextual data fits well with Publish-Subscribe Android, mobile platform, has XMPP support Any kind of messages between devices Part of Google APIs and services (fixed to Google) Public presentation 19 © Nokia Siemens Networks XMPP / Matti Vesterinen / 11.1.2008 enablers Open, standard protocol Code libraries for your favorite language Open source projects Clients Servers Server components Code libraries Security TLS, SASL, SPIM prevention, TCP stream, etc. Public presentation 20 © Nokia Siemens Networks XMPP / Matti Vesterinen / 11.1.2008 other protocols SIP/SIMPLE Voice drives SIP development Implementation getting difficult due to enormous number of specifications Bandwidth inefficient NATs and firewall troubles (UDP, message based) Proxy functionality (does not exist in XMPP) Proprietary protocols Fast development for specific needs Need gateways to interconnect One initial idea behind XMPP was to offer transparent comunication to other IM systems Public presentation 21 © Nokia Siemens Networks XMPP / Matti Vesterinen / 11.1.2008 conclusions Open and standard protocol Strong commitment to interoperability Implementations drive standardisation A lot of available extensions while easy to extend as needed One client – server XML stream TCP; http bindings available Transfer any smallish content over IP in real-time using XMPP Public presentation 22 © Nokia Siemens Networks XMPP / Matti Vesterinen / 11.1.2008 Questions & Answers ? Public presentation 23 © Nokia Siemens Networks XMPP / Matti Vesterinen / 11.1.2008
