Information Document 20-E

1. Information Document 20-E ITU-T Study Group 2 March 2003 QUESTION: ALL SOURCE: TSB TITLE: NGN activities in ITU-T (by Y-H. Choe, Engineer, ITU-T SG4)

2. CONTENTS • NGN activities • NGN project plan • NGN Aspects • Total solution in ITU-T • Conclusions

3. NGN Initial Considerations • NGN difficult to define in terms of: • specific technologies, specific architecture, Topology • Identify high-level paradigms • Separation of concerns, services from networks, Service Platform approach • Identify emerging NGN-generic issues • Architectural principles, OSI model relevance • Need for NGN models to show separation of concerns via functional architectures • Access/Core Separation • Competitive Access to Services • “Access Network” to include switching/routing • Multiple transport technologies, Ethernet, ATM, IP, MPLS in various combinations • Global Roaming (fixed and wireless networks)

4. Toys Communicating Coffee-maker IP Clock-radio (Stan Moyer, Telcordia) Musical instruments Communicating Digital Camera IP Telephone Games Internet (NGI) Virtual vision in ordinary prescription eyeglasses Engine monitoring, toll collection IP Maps, directions, Internet radio, engine software upgrades AC IP Lighbulb (Vint Cerf, MCI) Digital Car IP Radio/TV/ Audio Player NGN Service concept

5. IP IntServ DiffServ MPLS Internet QoS / Required to large Bandwidth IP/DiffServ/GMPLS over DWDM Differentiated Optical QoS Service Framework SONET/SDH DWDM Survivability & Network optimization NGN Backbone N.K. technology

6. ITU-T NGN activities • SG2 (Operational aspects of service provision, networks and performance, including numbering, naming, and addressing) • SG 4 (Network Management including TMN) • SG 11 (Signaling requirements and protocols) • SG 12 (End-to-end transmission performance of networks and terminals, QoS) • SG 13 (Multi-protocol and IP-based networks and their internetworking) • SG 15 (Optical and other transport networks) • SG16 (Multimedia services, systems and terminals) • SG 17 (Data Networks and Telecommunication Software) • SSG ("IMT-2000 and Beyond and for mobility)

7. NGN project plan • The concept of a NGN has been introduced to take account the new situation in telecoms, characterized by a lot of factors : • it aims at open competition between operators due to the total deregulation of markets, • explosion of digital traffic, e.g. due to the increasing use of internet, increasing demand from users for new multimedia services, • increasing demand from users for a general mobility, etc.. • major goal is to facilitate convergence of networks and services.

8. Basic characteristics of NGN • Packet-based transfer, • Separation of control functions • Decoupling of service provision • Support for a wide range of services • Broadband capabilities • Interworking with legacy networks • Generalized mobility • Unfettered access

9. ITU-T Study areas on NGN • General framework models • Functional architecture models • End-to-end Quality of Service (QoS) • Service platforms (APIs) • Network management • Security • Mobility

10. General framework models • General architectural principles • This will provide a basis for NGN. • The technical objective will be to develop a functional methodology and general model • Functional architecture methodology model • will provide guidelines on how to define a functional architecture for NGN

11. Functional architecture models • Use of generic RM techniques, Definition of interworking functions, • Determination of how end-to-end service, call control and user mobility can be supported across heterogeneous networks, • Definition of functionality of NGN-aware terminals, • In terms of software upgrade mechanisms • Redundancy and evolution of cost-reduced terminals • Version negotiation and management

12. Applicative, Middleware, Baseware svc.s Customer Operations Processes Resources Invocation Assurance Billing Fulfilment Functional groupings Management Control Transport Overall functional architecture model for NGN I .

13. End-to-end Quality of Service (QoS) • To handle both the way in which different end system can reach agreement ; • on the end-to-end QoS for a call • how the parameters set with this upper layer protocol can be used to control the lower layer • transport and access level QoS mechanisms. • For the issue of upper layer QoS control; • a distinction can be made between telephony the wider topic of QoS for multimedia • Likewise the control of lower layer QoS mechanisms is best divided into two topics: • “vertical” protocol linking the upper and lower layer QoS mechanisms (diffserv, etc) • lower layer “horizontal” mechanism to link the lower layer QoS control between different domains and networks.

14. Control Mechanism for QoS • DWDM based NGN QoS provision

15. Service platforms(APIs) • NGN work on service platforms(API) should concentrate on: • Definition of service control architectures covering both OSA APIs and proxy aspects; • Enhancement of mechanisms to support provision of services across multiple networks covering both service roaming and interconnectivity of services; • Development of mechanisms to support user presence and user control of service customisation and profiles; • Impact of user mobility on service platforms.

16. Network management • Enhancement “core” network management architecture • definition of basic network management services and interfaces • Development common TMN working methods • TMN to TMN interoperation using X-interface • Information models for Optical Transport Network (OTN) management for NGN • Inclusion and application of new architectural concepts and new technologies such as tML.

17. End-to-end SPVC/SVCs PNNI Networking • L2/L3 VPN services • Traditional L2 services • L2/L3 VPN services • Traditional L2 services IWF IWF Stacked LSPs MPLS Gateway Networking Solution implicat.s Multiservice Access Networks Core Network Multiservice Access Networks . MPLS Gateway MPLS Gateway ATM ATM FR CR-LDP/RSVP-TE FR L2 Access Networks L2 Access Networks PNNI PNNI Ethernet Ethernet MPLS Core IP-based Networks IP Routing IP Routing • L3 VPN and other IP services • L3 VPN and other IP services IP-based Networks

18. LSP “tunnel” OAM & Fault Management I.610 Y.iw Y.1711 IWF IWF ATM Network A ATM Network B Q3, M3 ? OSF/TMN SNMP = Possible trouble location

19. Security • Key Production • Key Management • Authentication • Need to further develop authentication • Global certification on security products/solutions • provision of support for the transition from a traditional network environment to IP-based networks

20. Mobility • NGN wireless network and terminal configurability, including the adaptation of resource allocation, • Integration of fixed/mobile/broadcasting networks and rules for distribution and decentralized control of functional entities, • Protocols that permit the network to adapt dynamically to changing channel conditions/Hand-over • Global Roaming, • Congestion-control algorithms,

21. Total Solution in ITU-T • Perfect Environment andUniversal Functionality • Optical and Transport Network • Security • QoS, Data network and Telecommunication Software • Network Management • Signaling and protocols • Mobility • Language and Tools • Multi protocol and IP-based network • Operational aspects, Service provision and Performance • Electro-magnetic environment • Multimedia

22. CONCLUSIONS • NGN is the most expected near future network • First Recommendation is expected 2004 • Will combine Fixed network and Wireless network • Makes come true to ‘Mobile computing Environment’ • ITU-T is the most perfect org. to NGN • Bring your business/requirements and make it Universal Recommendation • Please visit : http://www.itu.int