1. Korea Telecom 1 Architectures & Interworking in ITU-T SG13 14 May 2001 Chae-Sub, LEE (Korea Telecom)

2. Korea Telecom 2 Contents 1.Scope of WP 2/13 2.Questions in WP 2/13 3.Future Evolution Trend 4.Role & Activities of WP 2/13 study 5.Vision of WP 2/13

3. Korea Telecom 3 1. Scope of WP 2/13 GII 64 kbps based ISDN ATM/B- ISDN IP based network Multi-Protocol based network NGN INTERWORKING ARCHITECTURE

4. Korea Telecom 4 Scope and impacts of Architecture Work Service requirements and its Provision Facility Network Identification of Resources Assignment to Functional Group Identification of Reference Points Specifying required Capabilities Principles Business Model Logical Model / Framework Functional Model Implementational Model Specification of capabilities Scenarios Architecture Work ToP Down Bottom Up Long Term Short Term PC based Multimedia Mobile communication Home/Personal video Netizen Router/switch Soft switch wireless access, xDSL/WDM

5. Korea Telecom 5 Question Title 1/13 Principles, Requirements, Frameworks and Architectures for an Overall Heterogeneous Network Environment 5/13 Network Interworking including IP Multiservice Networks 10/13 Core Network Architecture and Interworking Principles 13/13 Interoperability of Satellite and Terrestrial Networks 14/13 Access Architecture Principles and Features at the Lower Layers for IP-Based and Other Systems 16/13 Telecommunication Architecture for an Evolving Environment 2. Questions in WP 2/13

6. Korea Telecom 6 Circuit based Electronic based Packet based transport Optic based transmission Integrated Telecommunication Infrastructure Voice Data inc. Voice Integrated Service Client to Server End to End User friendly control Full Open and Competition Environments Telecom. Business Broadcasting Business Tele-Broadcasting Business 2. Future Evolution Trend Change of Environment

7. Korea Telecom 7 Market Changes and its Push Circuit based Packet over Circuit Packet based Circuit over Packet

8. Korea Telecom 8 Expected Future Transition Trend Past : Seper. of Voice & Data Transp. Circuit Switch. Access Capa. Circuit Switch. Transp. Capa. Packet Switch. Transp. Capa. Present : Sep. of V & D Access xDSL / FTTx Circuit Switch. Access Capa. Circuit Switch. Transp. Capa. Packet Switch. Transp. Capa. Packet Switch. Access Capa. Near Future : Integration of V & D Transport VoIP / VToA Circuit Switch. Access Capa. Circuit Switch. Transp. Capa. Packet Switch. Transp. Capa. Packet Switch. Access Capa. Future : Integration of V & D Access and Transp. Packet Switch. Transp. Capa. Packet Switch. Access Capa.

9. Korea Telecom 9 Server based Configuration Net. A Net. C Net. D Net. B Service / Application 1 Service / Application 2 Service / Application 3 Service / Application 4 Connectivity Network Naming Server Policy Server Feature Server Subscrib. Server Resource Server Server (Middleware) Network Service / Application 1 Service / Application 2 Service / Application 3 Service / Application 4 Service / Application

10. Korea Telecom 10 Extension of Core Network Functions Switching Transmission Past Switching Transmission Brokering Today Routing Switching Transmission Traffic Policing Resource Arranging Media Adaptation Brokering Near Future Routing

11. Korea Telecom 11 Switching Routing Backbone Transmission Network Access Switching Network Access Network Accessing - ISDN - ADSL - Cable Modem - FLC - FTTH Addressing - IPv4, v6 - E.164 - NSAPNetworkManagement Multiplexing - IP - ATM - F/R - SDH/PDH - WDM Transmission - ATM - SDH - WDM Switching & Routing - IP - MPLS - ATM Management Platform - CMIP - SNMP - JAVA - CORBA - DCOM Backbone Switching Network Diversity of Access Technologies Policing

12. Korea Telecom 12 Computer/Consumer Technologies Broad- casting Infra. Telec. Infra. IP Platform or Others Structural Model of Convergence Tele- gaming TV Mail Interac. TV Web TV/FM TV Internet E- Comm. New Technologies and their Products Interworking between two Infrastructures and their convergence Networking Technologies and their Adaptations New Applications and their Service Interworking Relations Enterprise Model  Regulation User Operator Program Provider Regulator Possible Convergence Model of Tele-Broadcasting

13. Korea Telecom 13 4. Role and Activities of WP 2/13 Study Interconnection Architecture Interworking Develop Framework Architecture for RPOI Identify Reference Point of Interconnection Specify Attributes and Requirements of RPOI Framework Architecture of GII and Principle Develop Telecom. Archit. For Evolv. Environ. Study of New Reference Model Develop Framework of IP based Network Develop Automatic Transport Net. Archit. Develop Access Network Architecture Specify Network Capabilities for IP and others Develop Framework for Interworking Specify Interworking Functions btw. Different Networks and Services

14. Korea Telecom 14 Framework for RPOIs (Refer Rec. Y.140)

15. Korea Telecom 15 identify the functions and behaviors between the user and network facilities in terms of middleware services ; ensure adequate de-coupling between end user and network technologies; define functions and behavior of middleware components; identify points at which open interfaces might be defined. Party Identification Session Management Transport Selection Information Communication Architecture (Rec.Y.130)

16. Korea Telecom 16 G.astn ASTN Architecture ASTN Control Plane Discovery Signaling Routing CAC Link management Restoration Transport G.ndisc G.sdisc G.dcm Modified existing or G.otnrtg G.otncac G.otnlm Modified existing or G.otnres G.959.1/ G.709/G.798/ G.dcn/etc G.ason Work plan of Automatic Switched Transport Network Consent at this May SG 13 Meeting Consent at this October SG 15 Meeting

17. Korea Telecom 17 Interworking between Telecom Networks and IP based Network Transport Plane Interworking Control Plane Interworking Management Plane Interworking Ref. Rec. Y.1401

18. Korea Telecom 18 5. Vision of WP2/13 Application of IP technology into Telecom infra and specify Interworking between IP and Telecom service/network IP Issues Packet based infrastructure New architecture for full Packet based infrastructure (inc.Voice) Migration path from Circuit based to Packet based infra (inc. Interworking) Service and network capabilities for providing Packet based services New access technology, OAM and Performance study based on full Packet infra