IMS presentation

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Brief presentation for ims for be updated with NGN

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IMS presentation

  1. 1. IMS( IP Multimedia Subsystem )Presented by: Naouar ilies
  2. 2. OutlineIntroductionNext Generation Network (NGN)Concept and architecture of NGNIP Multimedia SubsystemArchitecture and entities of IMSIMS Call 2
  3. 3. IntroductionWith the model defined by the operators, the telephonenetwork could not provide any other services than thescheduled ones.So, the emergence of a new concept, the intelligentnetwork ( “Intelligent Network IN”) 3
  4. 4. Next Generation NetworkThe Challenge of NGN should provide all these criteria 4
  5. 5. Next Generation Network Concept 5
  6. 6. Evolution of Technology IMS IP 3G Wireless 3G wireless + IP ++ PSTN Wireless Internet W-CDMA Standard ServicesCircuit switched – VoIPa GPRS/UMTS Platform Circuit switchedAnalog – Instant Messaging ConvergedDigital Analog Applications & – Web Applications ContentSS7 DigitalISDNaa Access 2G (GSM Independence & CDMA ANSI-41) 6
  7. 7. IMS Architecture 7
  8. 8. IMS Entities 8
  9. 9. SIP Protocol•Session Initiation Protocol is a protocolstandardized by the IETF.•Designed to establish, modify and terminatemultimedia sessions•Does not convey the information exchangedduring the session such as voice or video•RTP provides the most audio and videosessions 9
  10. 10. IMS Call: SIP & IMS•SIP has been chosen by the IMS for its simplicityand its specific role.•Also,in the instant messaging, it will detect thepresence or not of the subscriber. 10
  11. 11. Thank you for your attention 11

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