1. International Telecommunication Union Workshop on Next Generation Networks: What, When & How? Geneva, 9-10 July 2003 Resonant Communication Network Architecture NTT’s Plans for NGN and Proposals for the Areas of Standardization Takashi Hanazawa Nippon Telegraph and Telephone Corporation

2. ITU-T 1 9-10 July 2003 Workshop on Next Generation Networks: What, When & How? NTT's Operating Revenue (Trillion yen) Decrease in revenue from POTS Major ISPs have started IP phone services in the last few years 8% (domestic) and 37% (int’l) drop in prices from 1998 to 2002 80% increase in users from 1998 to 2002 Spread of cellular phones Start of IP phone Increased competition

3. ITU-T 2 9-10 July 2003 Workshop on Next Generation Networks: What, When & How? Broadband Services in Japan (Thousand subscribers) 200120022003 Number of subscribers

4. ITU-T 3 9-10 July 2003 Workshop on Next Generation Networks: What, When & How? NTT’s “Vision for a New Optical Generation”  What are the aims?  For a carrier to provide added value to the broadband and ubiquitous network environment, by network services.  To create a rich variety of new services and business opportunities that capitalize on such features. <Broadband leading to the world of resonant communication> In the new-generation communications environment, people, as well as companies and other groups in society, will: - become “interactive,” using broadband; - be connected by a ubiquitous network, “anytime, anywhere and with anyone or anything”; - enjoy superior usability that is “secure, reliable and simple”.

5. ITU-T 4 9-10 July 2003 Workshop on Next Generation Networks: What, When & How? Interactive end-to-end communication services  Diversification in service features, such as security, service level guarantees, and presence information.  Penetration of easy-to-use terminals is a key issue.  New means of communication that will replace telephony in the future. Video delivery services  Appropriate business models are being explored which take account of copyright issues.  Amid the convergence between telecommunications and broadcasting, and in light of the soon-to-start digital terrestrial b/c, the b/c industry is highly interested. Potential demand is certain. Virtual Private Network (VPN) services  The diversification of means of network access, and the need for flexible network configuration have made highly value-added VPN a key to differentiation. Information home appliance control services  Widespread use of cellular phones and PDAs allows users to be always connected.  Initial targets are remote control of home appliances and home security services  Future targets include diverse services using RFID tags and various sensors. Network services envisaged for the NGN

6. ITU-T 5 9-10 July 2003 Workshop on Next Generation Networks: What, When & How? OXC IPv6 Diffserv Resonant Communication Network User premises Home GW GMPLS Firewall ENUM SIP Core network High-speed, high- capacity, QoS Presence Mobile IP Discovery End-to-end connection MPLS CWDM FWA B-PON GE-PON DNS Access network Service/network control platform Security RENA Resonant Communication Network Architecture Authentication IPSec Encryption

7. ITU-T 6 9-10 July 2003 Workshop on Next Generation Networks: What, When & How? Important standardization areas Core network Information home appliance control CommunitycollaborationContentcirculation Search engine Web Other network Service/network control platform Inter-node IF  Control protocol for multilayer transfer (GMPLS based) Inter-network IF  Control protocol for multilayer transfer Network-PF IF  NTW-PF interworking for security (SIP, MIDCOM)  NTW-PF Interworking for achieving QoS (SIP) Terminal-PF IF  Security when multiple SIPs are involved (SIP)  End-to-end security/QoS  Remote maintenance of terminals Inter-terminal IF  QoS through inter-terminal control (RTCP)  Remote-controlled services Access network IF  Optical access IF (B-PON, GE-PON) (ITU-T G983, IEEE802.3ahEFM) Network software architecture  Functional architecture allowing flexible implementation of network software  Inter-OSS IF allowing interworking between OSSs both inside and outside a corporation Home GW GW: gateway IF: interface PF: platform Home GW

8. ITU-T 7 9-10 July 2003 Workshop on Next Generation Networks: What, When & How? Home Gateway Remote control  Session control Authentication Home GW User network Home GW firmware Remote maintenance center Home GW functions are parts of NGN and will be implemented in stand-alone unit or in a broadband router, PC, or home appliance. Home GW firmware can be down-loaded from the service provider. To support fair competition and marketing, basic interfaces around the home GW should be well standardized. Service/network control platform RENA-based network Desired standardization areas

9. ITU-T 8 9-10 July 2003 Workshop on Next Generation Networks: What, When & How? Edge node Core node IP network Wavelength Optical/TDM network ISP Ether network ATM network Ether network ATM network Optical/TDM network OIX GMPLS Multilayer pass-through network architecture Control protocol Photonic network Edge node Desired standardization areas -GMPLS based protocol - Mapping onto L1 to pass as much as possible Tens of Tbit/s throughput will be needed in NGN. New core network architecture should be discussed and standardized. NTT is studying “multilayer pass-through network architecture” as one proposal for this.

10. ITU-T 9 9-10 July 2003 Workshop on Next Generation Networks: What, When & How? API Common applications NTT’s applications Third-party applications Network software platform Applications Open API for network software  effective development of new services  use of third-party applications  flexible operation of business Network software architecture  Flexible platform functions  Vendor-independent systems Network Software Desired standardization areas

11. ITU-T 10 9-10 July 2003 Workshop on Next Generation Networks: What, When & How? Conclusions Amid the radically evolving telecommunication industry environment, NTT places its business priority on “building broadband and ubiquitous networks.” NTT R&D continues to develop network services with the most advanced technology available, incorporating both de jure and de facto standards. NTT has a vast amount of accumulated know-how and experience, and firmly intends to make the most of these assets in pursuing its R&D programs.