1. Temasek Engineering School S atellite-Internet Competency Unit Presented by KK Kwong on behalf of John Leong Satellite-Internet WG APAN Technology Area

2. Agenda u SG-MY link and project trials u SG-JP AI3 link u Proposal to include HKPolyU in Satellite network u Test results in projects: u - TCP/IP over Satellite u - Hybrid Asymmetric link u New project proposal from members

3. TP Modem SG-MY Satellite Link TP Router USM Modem USM Router Mlabs MCS server Mlabs MCS client Mlabs MCS server Mlabs MCS client This Multipoint-to-Multipoint Video Conferencing System uses IGMP multicasting for efficient transmission of real-time multimedia data. Multicasting greatly reduces multimedia traffic compared to conventional unicast traffic, thus improving bandwidth utilization. Project Partner: Universiti Sains Malaysia (USM) MeaSAT provides free 2 Mbps satellite bandwidth MCS: Multimedia Conferencing System Mlabs: Multimedia Research Lab

4. SG-JP Link u Joined the AI3 network in Dec 99 with a 1.5 Mbps link via JCSAT-3 u Link from Temasek Polytechnic to Keio University, SFC campus established u Layer 2 router test successful

5. SG-JP Link TCP/IP protocol is designed to work with terrestrial copper or fibre- optic transmission medium. Its performance degrades over satellite link due to the inherent propagation delay over satellites. The setup below will study the performance issues faced by TCP/IP protocol over satellite link, and enable tests to be conducted to verify improvements in modified TCP/IP protocol over satellite link Internet Gateway VSAT ODUVSAT IDUVSAT ODUVSAT IDUInternet Gateway IDU : Indoor Unit ODU : Outdoor Unit Project Partners: Keio University, Japan NTU/NTRC & NUS/CIR, Spore

6. AI3 Project: Web Caching Internet Gateway Hub Cache Caching is a technique used to improve the performance of internet access by buffering the recently accessed web objects for future access. In the Asia Internet Interconnection Initiatives (AI3) grouping, a web cache bone is conceived to control and more efficiently utilize the satellite bandwidth consumption by web traffic. Internet Rim Cache Project Partners : CyberWay AIT, Thailand Keio University, Japan

7. AI3 Project: Multicast Internet Traffic over Satellite The advantage that Satellite transmission media has over cable or point-to-point terrestrial link is its ability to broadcast. Multicast or group addressing ensures that registered members of a group receive the Internet traffic with the same transmission, thus saving bandwidth Applications: Video Conferencing, Video Streaming, Distance Learning, Web Caching Collaboration: Universiti Sains Malaysia ITB, Indonesia Technology: DVMRP, PIM, Multicast Tunnel

8. AI3 Project: Internet Protocol Version 6 Internet Protocol version 6 (IPv6) looks set to be the successor to the current version of Internet Protocol, ie IPv4. IPv6 offers numerous benefits including 128-bit addressing (compared to IPv4s 32-bit), auto address configuration, and elaborate security features (IPSec) IPv6 IPv6/ IPv4 IPv6/ IPv4 IPv6 Router IPv4-tunnelled IPv6 configuration Temasek Polytechnic Singapore NAIST,Japan

9. TP Modem Proposal to include Hong Kong Polytechnic University in Satellite Network TP Router HKPU Modem HKPU Router VRCIM Client GDM Server VRCIM Server GDM Client Project Partner: Hong Kong Polytechnic University Temasek Polytechnic Required 2 Mbps satellite bandwidth WebCast Server RESONATE Server RESONATE Client

10. Project Results – TCP/IP Over Satellite Setup of Project Hub Router Modem Satellite Dish MeaSat 2 Satellite Dish Modem Router Switch Master PC Slave PC (1) Slave PC (2) Command File Test File Acknowledgement

11. Project Results – TCP/IP Over Satellite Results u RX Packets vs Delivery Time

12. Project Result – Hybrid Asymmetric Link Internet Application Server Hybrid Gateway Server Router Masquerading Host Asymmetric Satellite- Terrestrial Network Conventional Network User Network

13. Future u New Proposal for projects