1. The Distance Learning Session Management System for the Next Generation Internet 2003. 1. 22. Se-Jun Na

2. 2 Contents Outline Goals Related Technologies System Architecture System Features Conclusion

3. 3 Outline Existing Problems – few distance learning systems using the advantages of next generation network – lack of ability to manage sessions Solution – developing more effective & systematic session management system – using IPv6, Multicast, & WebService based on APII test-bed

4. 4 Goals Developing Multicast Session Management System – most suitable for Distance Learning environment – supporting IPv6 – adopting the WebService to exchange session information – applying DBMS to store session & lecture information – lecture browser including simple White-Board ability Reuse of Existing Mbone Tools – VIC(Video Conferencing Tool), RAT(Robust Audio Tool) – supporting inter-operatibility with existing Mbone tools Platform Independency – JAVA application

5. 5 Related Technologies(1) Multicast – bandwidth conserving technology – major role in supporting group-oriented applications – session management protocols;SDP, SAP IPv6 – solution to the lack of available IP addresses – scalability of multicast routing is improved

6. 6 Related Technologies(2) XML(eXtensible Markup Language) – the universal format for data on Web – used in WebService WebService – the platform for application integration – SOAP(Simple Object Access Protocol) – WSDL(Web Service Description Language) – UDDI(Universal Description Discovery & Integration)

7. 7 Web Service Model Related Technologies(3) Service Registry Service Requester Service Provider Find (WSDL, UDDI) Publish (WSDL, UDDI) Bind (SOAP)

8. 8 System Architecture(1) Session Menu Lecture Browser Invocation Interface VICRATEtc. Multicast Chat Distance Learning Client

9. 9 System Architecture(2) Distance Learning Server Session Management Server Database Resource Pool SQL System I/O

10. 10 Multicast Network Multicast Network System Architecture(3) IPv6 Multicast Network Multicast Routing Protocol (PIM-SM) IPv4/v6 Dual Stack Configured Tunneling IPv6 DNS Service IPv6 Router

11. 11 System Architecture(4) Overall Architecture DL Client DL Server IPv6 Multicast Network Web Service Session Announcing Discovery (UDDI) Description (WSDL) XML Messaging (SOAP) Transport (HTTP) Description (SDP) Announcement (SAP) Transport (Multicast)

12. 12 Data Format Architecture System Architecture(5) SDP SQL XML Java Beans for Session Announcemen t for DBMS for WebService for Application

13. 13 System Features(1) Main System Interface Session Menu Invoking Mbone Tools Multicast Chatting Lecture Browser

14. 14 System Features(2) Session Menu

15. 15 System Features(3) Inter-operation with VIC, RAT

16. 16 System Features(4) WSDL Document describing this WebService

17. 17 System Features(5) Internal WebService Message

18. 18 Conclusion Multicast Session Management System – best fit to the distance learning – applying WebService – using Mbone tools – supporting IPv6 Future Work – introducing SIP(Session Initiation Protocol) – security, accounting

19. 19 The End Thank you! Se-Jun Na sjna@hyuee.hanyang.ac.kr

20. 20

21. 21 IPv6 Tunneling

22. 22 Test between HYU & WASEDA