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Temasek Engineering School S atellite-Internet Competency Unit Presented by KK Kwong on behalf of John Leong Satellite-Internet WG APAN Technology Area. Agenda. SG-MY link and project trials SG-JP AI3 link Proposal to include HKPolyU in Satellite network Test results in projects:

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


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


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


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


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


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


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


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


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


Project Results – TCP/IP Over Satellite Satellite Network

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)


Project Results – TCP/IP Over Satellite Satellite Network

Results

  • RX Packets vs DeliveryTime


Project Result – Hybrid Asymmetric Link Satellite Network

Asymmetric Satellite-

Terrestrial Network

User Network

Conventional Network

Router

Router

Hybrid

Gateway Server

Internet

Application Server

Masquerading

Host


Future Satellite Network

  • New Proposal for projects


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