Kamailio & IMS

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Experiences while deploying IMS and the benefits brought by relying on Kamailio and open source for building flexible IMS platforms. Not many took the challenges of developing IMS extensions, even fewer could keep it going, this talk comes to present that IMS implementation is mature, with key deployments world wide, at a moment when this technology has to become the core of 4G+ networks.

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Kamailio & IMS

  1. 1. Kamailio and theIP Multimedia Subsystem (IMS)
  2. 2. (very) Basic IMS Architecture overview
  3. 3. Where do we stand?● Integration of IMS (OpenIMS-Core) started 2010● By now, all basic IMS functionality is ready:● SIP-Proxies (Proxy-/Interrogating-/Serving-CSCF)● With according Diameter-Interfaces (Rx, Cx/Dx, Ro)● All necessary components are part of Kamailio 4All components are stable, reliable & fast!
  4. 4. What is missing?(according to IMS specs)● IPSec (aka. the „GM“-Interface)● Emergency-CSCF (for emergency services)● … some fine tuningThats about it!
  5. 5. GSMAs RCS and Kamailio● SIP/SIMPLE is integrated in Kamailio for years● Including Extensions for RLS & Conferencing● Including an XMPP Gateway functionality● Integrated XCap-Server was added in 2010● Integrated MSRP-Relay was added in March 2012All protocols forGSMAs RCS-Standards implemented!
  6. 6. Other thoughts on IMS„IMS is about keeping old business models andpreserving them in the new technichal platform,instead of using the potential of the new technologyto change business models.“(Olle E. Johansson)
  7. 7. New business models? Fine, but...…dont you still want:● an efficient network?● a secure network?● a reliable network?● billing?
  8. 8. Dont re-invent the wheel!Billing & Charging:● Diameter Ro-Interface in Kamailio*● Pre- and Postpaid billing● Tested against jBilling, Ericsson Prepaid-Server,Mobicents and others... ;-)*) available in the next Kamailio release
  9. 9. An efficient & reliable setupGoals:● Maximum reliability & security● Shortest Media-Path for efficiency & quality● Scaling factors
  10. 10. An efficient & reliable setup
  11. 11. Conclusion● IMS provides all core functions for your network● Registration, Call-Routing, Security, Scalability,Billing, Authorization, Authentication, ...Focus on building applicationsInstead of re-inventing the wheel again!
  12. 12. People involved in IMS on KamailioJason Penton & Richard GoodSmile Communications (South Africa)Alexis Marcou & Camille OudotOrange (France)
  13. 13. Questions?
  14. 14. Thank you!Contact: www.ng-voice.com - carsten@ng-voice.com

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