1. IMS Workshop- Summary James Rafferty August 10. 2006

2. Agenda Recap –Goals of IMS –Key Elements of Architecture –Applications –Relevance for the Enterprise –Best Practices Resources Your Takeaways Q & A

3. What is IMS… IP Multimedia Subsystem (IMS) is an architecture that enables wireline, wireless and cable operators to offer a new generation of rich multimedia services –Across both circuit switched and packet switched networking infrastructures IMS defines a architecture of logical elements using SIP for call signaling between network elements –Provides a layered approach with defined service, control, and transport planes

4. The IMS Architecture

5. IMS – Simplified View  AS – Application Server  SCIM - Service Capability Interaction Manager  MRFC - Multimedia Resource Function Controller  MRFP - Multimedia Resource Function Processor  MRF – Media Resource Function  CSCF- Call Session Control Function  BGCF - Breakout Gateway Control Function  MGCF - Media Gateway Control Function  MGW - Media Gateway  HSS - Home Subscription Server  HLR - Home Location Register Key Elements: Application Server HSS/HLR MRFC MRFP CSCF MGW SCIM S-CSCF I-CSCFP-CSCF BGCF MGCF MRF SIP RTP

6. Other Key IMS Concepts Multiple Plane Architecture –Makes use of separate planes: Application, Transport and Session Control Common Security and Login functions –Makes use of Diameter protocol and HSS (Home Subscriber Server) to validate users Applications and Services are independent of Access Method –Enables support for 3G mobile, WiFi, DSL, etc.

7. IMS Benefits Shared Resources Media server resources Common user data Single user profile across applications Integrated applications Shared Resources Media server resources Common user data Single user profile across applications Integrated applications Session Control Common Session Control (SIP) Provides common service policies Leverages investments across multiple applications Session Control Common Session Control (SIP) Provides common service policies Leverages investments across multiple applications Access Network Agnostic Eliminates multiple service solutions Network transparency Consistent services across networks Access Network Agnostic Eliminates multiple service solutions Network transparency Consistent services across networks Converged Applications Across Networks Reduced development costs and time Voice, Video and data services Write once / use many Converged Applications Across Networks Reduced development costs and time Voice, Video and data services Write once / use many Transport Control Applications DSL Mobile PSTN Voice Video Hosted Services Web Content MP3 Win Media Text Data SIP Access CMTS

8. Why IMS? Need a better environment for creating and deploying high value multimedia services Transform business models from voice-driven to service-driven businesses Fixed-Mobile Convergence on a common IP application and service delivery architecture Grow and protect subscriber base, increase ARPU (Average Revenue Per User) Deliver a differentiated portfolio of value-added services Provide more subscriber focused offerings Controlling CAPEX and OPEX Maturity and adoption of SIP and XML Web model development model shortens the required investment of a programmer to develop new applications Enables best-of-breed solutions with focus on new IP application services Faster time to market with new services Develop on standards-based technology Reduce time to market for new applications with web development model

9. IMS Applications NFS HTTP FTP Network Storage Web Content mp3 Win Media Text Video Ringback Video Conferencing Gaming Sponsored Calling SIP MSCML ConferencingVideo MailAnnouncements RTP Pre-PaidVoice Mail SIP (MRFC/MRFP) IP MSCMGWCMTS SIP SIP SIP w/ VoiceXML SIP w/ MSCML Unified Messaging SIP SIP VoiceXML MPEG-4 IMG SIP Routing Cloud 3G 2.5G PSTN Cable IP Phones S-CSCF / SCIM MRF

10. Other Likely IMS Applications FMC – Fixed Mobile Convergence IP Centrex Hosting for Businesses Audio and Video combined with other services –For example, conferencing, push-to-communicate, Multimedia over Broadband, Multimedia IM Legacy Migration –Voice mail, conferencing, SMS, Prepaid Services

11. IMS and the Enterprise How will IMS affect the Enterprise? 1.IMS will be the preferred hosted services environment for carriers 2.Enterprises can borrow “best practices” from IMS for its own services 3.Service orientation of IMS echoes and complements Enterprise driven approaches such as SOA (Service Oriented Architecture)

12. IMS Best Practices IMS includes “lessons learned” from many predecessor architectures Best Practices include: –Separation of signaling from media –Separation of Applications from underlying sessions and transport –Services provided are independent of underlying transport –Common mechanisms for authenticating users and securing sessions Review Call Center Example

13. Enterprise LAN Call Center Server w/ Voip Gateway Agents on IP Phones PSTN Agent on Soft Phone Customer Local Campus (Traditional) RTP H.323 T1/E1 ISDN/CAS All Agents in single location Uses all-in-one system to handle all calls Signaling and Media combined in one system

14. Application of IMS Best Practices Contact Center Example Separate the application server apart from the Media Use a separate Media Resource Function –Single MRF can support multiple applications Use XML + markup languages for fast development and flexible, mid-call agent interactions Use SIP as the protocol which ties the pieces together

15. Signaling Gateway Enterprise LAN Application Server Agents on IP Phones PSTN Agent on Soft Phone Customer Web Customer Email Customer Remote Agent Internet Case Study: Distributed Contact Center MRF RTP Media GW SIP/ VoiceXML MSCML Improved Scalability: Separate Application from Media Ability to add new media such as video as needs evolve Fast development using SIP + XML

16. Resources IMS Forum – www.imsforum.org 3GPP – www.3GPP.orgwww.3GPP.org Internet Engineering Task Force – www.ietf.org www.ietf.org ETSI TISPAN - http://portal.etsi.org/portal_common/home.asp?tbkey1=TISPAN

17. Workshop What our your “Takeaways” from this course? Is there other material you would have liked to have been covered? Any other comments

18. Q & A