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

Temasek Engineering SchoolSatellite-Internet Competency Unit

Presented by

KK Kwong on behalf of John Leong

Satellite-Internet WGAPAN Technology Area

AgendaAgenda

SG-MY link and project trialsSG-MY link and project trials

SG-JP AI3 link SG-JP AI3 link

Proposal to include HKPolyU in Proposal to include HKPolyU in

Satellite networkSatellite network

Test results in projects:Test results in projects:

- TCP/IP over Satellite- TCP/IP over Satellite

- Hybrid Asymmetric link- Hybrid Asymmetric link

New project proposal from membersNew project proposal from members

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 SystemMlabs: Multimedia Research Lab

SG-JP LinkSG-JP Link

Joined the AI3 network in Dec 99 with a 1.5 Mbps Joined the AI3 network in Dec 99 with a 1.5 Mbps

link via JCSAT-3link via JCSAT-3

Link from Temasek Polytechnic to Keio Link from Temasek Polytechnic to Keio

University, SFC campus establishedUniversity, SFC campus established

Layer 2 router test successfulLayer 2 router test successful

SG-JP LinkTCP/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 IDU VSAT ODU VSAT IDU Internet Gateway

IDU : Indoor UnitODU : Outdoor Unit

Project Partners:• Keio University, Japan• NTU/NTRC & NUS/CIR, S’pore

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

Rim Cache

Rim CacheProject Partners : CyberWay

AIT, Thailand Keio University, Japan

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

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)

IPv6IPv6/IPv4

IPv6/IPv4 IPv6

Router Router

IPv4-tunnelled IPv6 configuration

Temasek PolytechnicSingapore NAIST,Japan

TP Modem

Proposal to include Hong Kong Polytechnic University in Satellite Network

TP Router

HKPU Modem

HKPU Router

VRCIM Client

GDM Server

VRCIMServer

GDM Client

Project Partner: • Hong Kong Polytechnic University• Temasek Polytechnic • Required 2 Mbps satellite bandwidth

WebCast Server

RESONATE Server

RESONATE Client

Project Results – TCP/IP Over SatelliteProject 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

Project Results – TCP/IP Over SatelliteProject Results – TCP/IP Over Satellite

Results RX Packets vs DeliveryRX Packets vs Delivery Time Time

Project Result – Hybrid Asymmetric LinkProject Result – Hybrid Asymmetric Link

Internet Application Server

Hybrid Gateway Server

RouterRouterMasquerading Host

Asymmetric Satellite-Terrestrial Network

Conventional Network

User Network

FutureFuture

New Proposal for projectsNew Proposal for projects