1. Geneva, 15 May 2009 Status of NGN architecture related studies in ITU-T SG13 Olivier Le Grand WP 3/13 chairman France Telecom JOINT ITU-T SG13 - IEEE NGSON WORKSHOP ON OVERLAY NETWORKING (Geneva, 15 May 2009)

2. Geneva, 15 May 2009 2 Separation of services from transport in NGN (Rec. Y.2011) 2 NGN transport NGN services e.g., Voice telephony services (audio, fax, etc.) e.g., Data services (WWW, e-mail, etc.) e.g., Video services (TV, movie, etc.) CO-CS, CO-PS and CL-PS layer technologies "NGN service stratum" vs "NGN transport stratum" Each stratum comprises one or more layers, where each layer is conceptually composed of a data (or user) plane, a control plane, and a management plane

3. Geneva, 15 May 2009 3 NGN architecture overview (Rec Y.2012) Transport stratum Service stratum Control Media Management Functions Management ANI Transport Control Functions Resource and Admission Control Functions Network Attachment Control Functions NNI UNI Application Support Functions & Service Support Functions Applications Transport Functions End-User Functions Other Networks Service Control Functions Service User Profiles Transport User Profiles

4. Geneva, 15 May 2009 4 Legacy Terminals Note: Gateway (GW) may exist in either Transport Stratum or End-User Functions. * Legacy Terminals Transport Stratum Service Stratum End-User Functions Application Functions Core transport Functions NGN Terminals Customer Networks Other Networks Application Support Functions and Service Support Functions (ASF&SSF) Core Transport Functions Other Networks Edge Functions Service Control Functions Network Access Attachment Functions Network Attachment Control Functions (NACF) Access Network Functions Resource and Admission Control Functions (RACF) User Profile Functions T. User Profile Functions GW Other NGN Service Components PSTN/ISDN Emulation Service Component IP Multimedia Component &PSTN/ISDN Simulation IP Multimedia Service Component S. User Profile Functions GW Applications Re-use and adaptation of 3GPP IMS to provide multimedia services (Rec Y.2021) A unified IP network with improved security and QoS (Rec Y.2111) "Service delivery platform" making use of NGN easily Evolution scenario of PSTN and short-term solution (Y.2031) NGN functional components Network attachment (Rec Y.2014)

5. Geneva, 15 May 2009 5 Functional Entities (ASF&SSF, Y.2012) A-3: APL-SCM-FE * A-2: APL-GW-FE* Applications A-4: SS-FE A-1: AS-FE* Application Support Functions and Service Support Functions ANI S-1: S-CSC-FE S-4: SL-FE S-15: GSC-FE S-6: SAA-FE Service Control Functions S-14: MRB-FE Note: * may include Authentication, Authorization, and Accounting S-5: SUP-FE A-S 4 A-S 1 A-S 2 A-S 6 A-S 5 A-S 3 T-9: SG-FE Transport Processing Functions End User Functions A-U 1 A-T 1 UNI S-13: MRC-FE

6. Geneva, 15 May 2009 6 "Open Service Environment functional architecture in NGN": Based on OSE capabilities and functional components defined in Rec ITU-T Y.2234 Objectives: define the OSE functional architecture model relationship/mapping with already defined Y.2012 ASF&SSF FEs Ongoing work on ASF&SSF: Y.OSE-arch

7. Geneva, 15 May 2009 7 NGN OSE functional positioning

8. Geneva, 15 May 2009 8 Overlay networking and NGN Inputs referring to "Overlay networking" targeting different scenarios: e.g. for supporting multicast (IPTV, Content Delivery), … Scenarios, corresponding requirements and capabilities to be consolidated Relationship to NGN functional architecture: Cases to be considered (on a per scenario basis): Overlay to the IP layer but still part of NGN Transport stratum Overlay to the NGN Transport stratum, i.e. part of the NGN Service stratum Overlay to the NGN Service stratum, i.e. above the NGN Functions to be supported Relationship to existing NGN functions and functional entities to be assessed

9. Geneva, 15 May 2009 9 Conclusion The NGN architecture is being enhanced in order to support Open Service Environment (OSE) capabilities as defined in Y.2234 Paving the way towards a possible NGN "Service Delivery Environment/Platform" architecture Collaboration with other SDOs such as OMA, OASIS, TMF,… Use of "Overlay networking" techniques in NGN is being studied Consolidation expected in terms of addressed scenarios, corresponding requirements and related architectural impacts Note: See backup slides for information on NGN architecture related recommendations (approved or under development)

10. Geneva, 15 May 2009 10 Back up slides

11. Geneva, 15 May 2009 11 ITU-T NGN architecture related Recommendations (Y Series) 11 Y.2001 General overview of NGN Y.2011 General principles and general reference model for Next Generation Networks Y.2012 Functional requirements and architecture of the NGN Y.2014 Network attachment control functions in next generation networks Y.2015 General requirements for ID/locator separation in NGN Y.2021 IMS for Next Generation Networks Y.2031 PSTN/ISDN emulation architecture Y.2111 Resource and admission control functions in Next Generation Networks Y.2233 Requirements and framework allowing accounting and charging capabilities in NGN Y.2234 Open service environment capabilities for NGN Y.1910 IPTV functional architecture

12. Geneva, 15 May 2009 12 ITU-T NGN architecture related Recommendations (Y series) 12 Y.2804 Generic framework of mobility management for NGN Y.2805 Framework of location management for NGN Y.2806 Framework of handover control for NGN Y.2901 The carrier grade open environment reference model Y.FRA2 Functional requirements and architecture of the NGN (version 2) Y.MMCF Mobility management and control framework and architecture within the NGN transport stratum Y.SMF Mobility management in service stratum for NGN Y.OSE-arch Open Service Environment Functional Architecture for NGN Y.FMC-IMS Fixed mobile convergence with a common IMS session control domain Y.FAid-loc- split Functional architecture of Id-Loc-split in NGN Y.CD&S Architectural configuration of Content Delivery and Storage in NGN

13. Geneva, 15 May 2009 13 Useful Links ITU http://www.itu.int NGN Global Standards Initiative (NGN-GSI) http://www.itu.int/ITU-T/ngn/index.html SG 13 (Future Networks including mobile and NGN) http://www.itu.int/ITU- T/studygroups/com13/index.asp 13