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Migration Towards Converged Networks

FORUM ON NEXT GENERATION STANDARDIZATION (Colombo, Sri Lanka, 7-10 April 2009). Migration Towards Converged Networks. Dr. Ghassem Koleyni. Content. Telecommunications network Network evolution Needs and expectations What is NGN? PSTN & ISDN evolution to NGN Standardization activities

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Migration Towards Converged Networks

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  1. FORUM ON NEXT GENERATION STANDARDIZATION (Colombo, Sri Lanka, 7-10 April 2009) Migration Towards Converged Networks Dr. Ghassem Koleyni

  2. Content Colmbo, Sri Lanka, 7-10 April 2009 Telecommunications network Network evolution Needs and expectations What is NGN? PSTN & ISDN evolution to NGN Standardization activities Conclusion

  3. Telecommunications Network Colmbo, Sri Lanka, 7-10 April 2009 Core Network Home Network Home Network Access Network Access Network

  4. Network Evolution Colmbo, Sri Lanka, 7-10 April 2009 • IP: Mid to late 1970’s (No QoS guaranteed) • Ethernet: 1973-1975 at Xerox • ISDN: Mid to late 1980’s (QoS guaranteed while increasing the bandwidth, many new services ) • X.25: Mid to late 1980’s (transmission of data without loss nor duplication) • FR: Mid to late 1980’s (QoS guaranteed while increasing the bandwidth) • ATM: Early 1990’s (guaranteed QoS, increased bandwidth,combined switching and transport capability with high level of performance and scalability)

  5. Vertically-Integrated Networks Colmbo, Sri Lanka, 7-10 April 2009 Voice Services Data Services Video Services Voice Services Network Data Services Network Video Services Network • Different sets of services and networks • Reduced efficiency • Increased cost

  6. Expectations (I) Colmbo, Sri Lanka, 7-10 April 2009 • Reduced expenses • Fewer core switches and transit exchanges • Reduced CAPEX & OPEX • Faster return on investment • Increased network efficiency and utilisation • Reduced deployment time • Fast and open service creation platform • One-stop shop for billing • A set of management functions shared between different services • Open services architecture

  7. Expectations (II) Colmbo, Sri Lanka, 7-10 April 2009 • Interoperable networks • Standardized interfaces and protocols • Faster service deployment • Multimedia services support • Guaranteed QoS and QoS differentiation • Access agnostic (copper, cable, fibre, wireless) • Service continuity between fixed and mobile • Terminal portability • Increased bandwidth availability • Secure, reliable and simple (ease of use) • Affordable

  8. The Evolution Trend Colmbo, Sri Lanka, 7-10 April 2009 Circuit- switched Telephone services TDM based Proprietary Switching Services Transmission Interfaces Packet- switched Multimedia services SDH, PDH, etc. Standardized

  9. Colmbo, Sri Lanka, 7-10 April 2009 NGN standardization in ITU-T

  10. Chronology of NGN Standardization in ITU-T Colmbo, Sri Lanka, 7-10 April 2009 • First workshop on NGN in ITU-T convened in Geneva, 9-10 July 2003 • Meeting convened with cooperation from SGs 11, 13, 16 and SSG (predecessor to SG 19) • Presentations from different interest groups • SG 13 was tasked to lead study group on NGN • First JRG-NGN meeting, 29 September to 2 October 2003 • Four draft Recommendations were generated • NGN Focus Group was formed in May 2004 • Study Group 13 (NGN SG) established by WTSA-04 as the lead SG for NGN studies • NGN-GSI started in 2006 and is continuing

  11. Next Generation Network (NGN) Colmbo, Sri Lanka, 7-10 April 2009 A packet-based network able to provide telecommunication services and able to make use of multiple broadband, QoS-enabled transport technologiesand in whichservice-related functionsareindependent from underlying transport-related technologies. It enables unfettered access for users to networks and to competing service providers and/or services of their choice. It supports generalized mobility which will allow consistent and ubiquitous provision of services to users. Source: ITU-T RecommendationY.2001

  12. Different aspects of NGN (I) Colmbo, Sri Lanka, 7-10 April 2009 Packet-based transfer  Separation of control functions among bearer capabilities, call/session, and application/service Decoupling of service provision from transport, and provision of open interfaces Support for a wide range of services, applications and mechanisms based on service building blocks (including real time/streaming/non-real time services and multi-media)

  13. Different aspects of NGN (II) Colmbo, Sri Lanka, 7-10 April 2009 Broadband capabilities with end-to-end QoS and transparency Interworking with legacy networks via open interfaces Generalised mobility Unfettered access by users to different service providers A variety of identification schemes which can be resolved to IP addresses for the purposes of routing in IP networks 

  14. Different aspects of NGN (III) Colmbo, Sri Lanka, 7-10 April 2009 Unified service characteristics for the same service as perceived by the user Converged services between Fixed and Mobile networks Independence of service-related functions from underlying transport technologies Support of multiple last mile technologies Compliant with all Regulatory requirements, for example concerning emergency communications and security/privacy

  15. In Brief Colmbo, Sri Lanka, 7-10 April 2009 NGN, a single network providing services agnostic to the underlying transmission technologies and through different access networks • Simplicity • Increased productivity • Increase customer satisfaction • Increased revenue

  16. Horizontally Integrated Network Colmbo, Sri Lanka, 7-10 April 2009 Management plane Control User plane NGN Services Stratum Management plane Control User plane NGN Transport Stratum NGN Basic Reference Model (NGN BRM)

  17. Separation of Services from Transport in NGN Colmbo, Sri Lanka, 7-10 April 2009 e.g., Video services (TV, movie, etc.) e.g., Data services (WWW, e-mail, etc.) e.g., voice telephony services (audio, fax, etc.) NGN services CO-CS, CO-PS and CLPS layer technologies NGN transport

  18. General NGN Functional Model Colmbo, Sri Lanka, 7-10 April 2009 Infrastructural, application, middleware and baseware services Services NGN Service Resources Service control functions Service management functions Transport control functions Transport management functions s e c r NGN Transport u o s e R Transfer functional area

  19. Colmbo, Sri Lanka, 7-10 April 2009 Applications Service User Profiles ANI Application Support Functions & Service Support Functions Service Control Functions Service stratum Transport User Profiles Management Functions Network Attachment Control Functions Resource and Admission Control Functions End-User Functions Other Networks Transport Control Functions Transport Functions UNI NNI Transport stratum Management Media Control 19

  20. Re-distribution of Service Intelligence Colmbo, Sri Lanka, 7-10 April 2009 Core Migration of Service Intelligence User Access Access User

  21. Colmbo, Sri Lanka, 7-10 April 2009 PSTN & ISDN Evolution to NGN

  22. What to consider when evolving PSTN/ISDN to NGN Colmbo, Sri Lanka, 7-10 April 2009 • Transport • Signalling and control • Management • Services • Bearer services • Supplementary services • Operation, administration and maintenance (OAM) • Naming, numbering and addressing • Accounting, charging and billing • Inter-working • National regulations • Emergency telecommunications • Security aspects

  23. Different Approaches Colmbo, Sri Lanka, 7-10 April 2009 • Call server (CS)-based • Equipment re-use • Service continuity • IP multimedia sub-system (IMS)-based • Immediate migration • Access to new services

  24. NGN: CS-based Colmbo, Sri Lanka, 7-10 April 2009 PSTN ISDN Call Server Cable, IAD, xDSL Packet Switched Network Private Lines Wireless AN PABX signalling

  25. Example of PSTN/ISDN Evolution Colmbo, Sri Lanka, 7-10 April 2009

  26. NGN: IMS-based Colmbo, Sri Lanka, 7-10 April 2009 IMS Packet Switched Network Other networks Other networks signalling

  27. PSTN/ISDN Emulation & Simulation Colmbo, Sri Lanka, 7-10 April 2009 • PSTN/ISDN emulation Provides PSTN/ISDN servicecapabilities and interfaces using adaptation to an IP infrastructure. • PSTN/ISDN simulation ProvidesPSTN/ISDN-like servicecapabilities using session control over IP interfaces and infrastructure.

  28. Colmbo, Sri Lanka, 7-10 April 2009 Emulation, Simulation, Interoperability and Interworking with NGN User Equipment NGN (Carrier Y) PLMN User Equipment NNI UNI UNI NGN (Carrier X) UNI UNI NNI Public IP NETWORK PSTN/ISDN User Equipment SIMULATION EMULATION

  29. Evolution Strategy Colmbo, Sri Lanka, 7-10 April 2009 • Transition cost • Business model • Customer expectation • Are customers ready for changes? • If higher expenses are involved, are customerstready to pay? • Choice of technology • Products and services to be offered • Domestic regulations

  30. NGN Recommendations, Y Series Colmbo, Sri Lanka, 7-10 April 2009

  31. NGN Recommendations, Q Series Colmbo, Sri Lanka, 7-10 April 2009

  32. Conclusion Colmbo, Sri Lanka, 7-10 April 2009 • Substantial progress has been made in the preparation of specifications addressing evolution of networks to NGN • Good progress on signalling and protocol work • More work needs to be done, specifically on the OAM, management and control & signalling aspects Compliance to global standards would reduce procurement costs and promote inter-operability

  33. List of Acronyms ) Colmbo, Sri Lanka, 7-10 April 2009 ADF Adaptation Function AG Access Gateway AN Access Network ANI Application Network Interface ATM Asynchronous Transfer Mode CAPEX CAPital EXpenditure CO-CS connection-oriented circuit- switched CO-PS connection-oriented packet- switched CLPS connectionless packet- switched CS Call Server DSL Digital Subscriber Line DTE Data Terminal Equipment FR Frame Relay IAD Integrated Access Device IMS IP Multimedia Sub-system IP Internet Protocol ISDN Integrated Services Digital Network IWF Inter-working Function LE Local Exchange NGN Next Generation Network NNI Network Network Interface OAM Operation, Administration, Maintenance OPEX OPerating EXpenditure PABX Private Automatic Branch eXchange PBX Private Branch eXchange PDH Plesiochronous Digital Hierarchy PLMN Public Land Mobile Network PSPDN Packet Switched Public Data Network PSTN Public Switched Telephone Network QoS Quality of Service REV Reverse Charging SDH Synchronous Digital Hierarchy SG Signalling Gateway SIP Session Initiation Protocol TDM Time Division Multiplexing TE Transit Exchange TMG Trunking Media Gateway TV Television UAM User Access Module UNI User-Network Interface WWW World Wide Web

  34. Thank you for your attention Colmbo, Sri Lanka, 7-10 April 2009 Dr. Ghassem Koleyni Email:ghassem@rogers.com Tel: +1 613 592 5344

  35. Colmbo, Sri Lanka, 7-10 April 2009 Back up slides

  36. ITU-T NGN Related Recommendations (Q Series) Colmbo, Sri Lanka, 7-10 April 2009

  37. ITU-T NGN Related Recommendations (Q Series) Colmbo, Sri Lanka, 7-10 April 2009

  38. ITU-T NGN Related Recommendations (Q Series) Colmbo, Sri Lanka, 7-10 April 2009

  39. ITU-T NGN Related Recommendations (Y Series) Colmbo, Sri Lanka, 7-10 April 2009

  40. ITU-T NGN Related Recommendations (Y Series) Colmbo, Sri Lanka, 7-10 April 2009

  41. ITU-T NGN Related Recommendations (Y Series) Colmbo, Sri Lanka, 7-10 April 2009

  42. Useful Links Colmbo, Sri Lanka, 7-10 April 2009 • ITU • http://www.itu.int • NGN Global Standards Initiative (NGN-GSI) • http://www.itu.int/ITU-T/ngn/index.html • SG11 (Signalling & Control Protocols) • http://www.itu.int/ITU-T/studygroups/com11/index.asp • SG 13 (Future Networks and NGN) • http://www.itu.int/ITU-T/studygroups/com13/index.asp

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