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Satellite Internet Competency Unit

This presentation discusses the SG-MY and SG-JP satellite internet links, proposal to include HKPolyU in the network, and test results of TCP/IP over satellite and hybrid asymmetric links.

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Satellite Internet Competency Unit

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  1. Temasek Engineering SchoolSatellite-Internet Competency Unit Presented byKK Kwong on behalf of John LeongSatellite-Internet WGAPAN Technology Area

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

  3. SG-MY Satellite Link 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 Mlabs MCS server Mlabs MCS server TP Modem USM Modem Mlabs MCS client Mlabs MCS client TP Router USM Router

  4. SG-JP Link • Joined the AI3 network in Dec 99 with a 1.5 Mbps link via JCSAT-3 • Link from Temasek Polytechnic to Keio University, SFC campus established • 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 • Project Partners: • Keio University, Japan • NTU/NTRC & NUS/CIR, S’pore Internet Gateway VSAT IDU VSAT ODU VSAT ODU VSAT IDU Internet Gateway IDU : Indoor Unit ODU : Outdoor Unit

  6. AI3 Project: Web Caching 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 Rim Cache Internet Gateway Hub Cache Project Partners : CyberWay AIT, Thailand Keio University, Japan Rim Cache

  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 Technology: DVMRP, PIM, Multicast Tunnel Applications: Video Conferencing, Video Streaming, Distance Learning, Web Caching Collaboration: Universiti Sains Malaysia ITB, Indonesia

  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 IPv4’s 32-bit), auto address configuration, and elaborate security features (IPSec) Temasek Polytechnic Singapore NAIST,Japan IPv6/ IPv4 IPv6/ IPv4 IPv6 IPv6 Router Router IPv4-tunnelled IPv6 configuration

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

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

  11. Project Results – TCP/IP Over Satellite Results • RX Packets vs DeliveryTime

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

  13. Future • New Proposal for projects

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