Project Wireless VietnamFinal Presentation 21st of May 2003 Royal Institute of Technology, KTH Stockholm, Sweden
Project Wireless Vietnam
Final Presentation 21st of May 2003 Royal Institute of Technology, KTH Stockholm, Sweden
Project Team
Joanna Kühn Christine Simon Tung Thanh Nguyen Nhien To Ngo Hanh Van Nguyen
KTH KTH MoST MoST MoST
joannak@kth.se iw02_sch@it.kth.se tungnt@moste.gov.vn ntnhien@moste.gov.vn hanh@moste.gov.vn
Project Team (cont)
Principal: Coach: Co-coach:
Lars Gimbert Alberto Escudero-Pascual Van Nguyen Hong
glimmen@dsv.su.se aep@it.kth.se hvan@moste.gov.vn
DSV/Sida KTH/IT MoST
Overview
Introduction
Background
Project goal
Time Plan
Wireless Technology
Network design & implementation
Test link results
Future expansion
Risk analysis
Treats & weaknesses
Problems
Benefits
Summary & Conclusions
Questions & Answers
Background
The Wireless Vietnam project is a subproject of the ongoing Science, Technology and Education network (STE-NET) project
The STE-NET project aims to build an educational network infrastructure
The infrastructure will provide Internet connectivity and information services to the different educational sectors in Vietnam
Background (cont)
The STE-NET project is co-operation between:
Sida – Swedish International Development co-operation Agency
MoST – Ministry of Science and Technology in Vietnam
IT – University in Kista, Sweden
Project goal
Provide a showcase and evaluate the wireless broadband technology by deploying a testbed, which connects MoST with two other buildings.
The two chosen buildings acting as pilot sites:
NACENTECH (National Centre for Scientific and Technological Information and Documentation)
NACESTID (National Centre for Technology Progress)
Time plan
January – March: Stockholm
Initialization of the project
Research in wireless technologies
Selection of an appropriate wireless technology
Design the wireless network
April – Middle of May: Hanoi
Testing equipment
Implementation of the testbed
Evaluation of the design network
Documentation
May: Stockholm
Course deliverables (final presentation, video, final report, exhibition material, lesson learned paper)
Wireless Technology
Why IEEE 802.11b was chosen?
Worldwide used technology
Open standard
Low cost
Regulatory aspects (e.g. frequency, output power)
Wireless Technology (cont)
Two ways of building wireless networks:
Ad-hoc
Peer-to-Peer
Infrastructure
Point-to-Point
Point-to-Multipoint
Peer-to-Peer
No backbone, computers communication directly to each other
Suitable for a smaller area (e.g. home networks)
Point-to-Point
Suitable for long distant dedicated links
Wireless Outdoor Router (WOR) are used in bridging or router mode
Point-to-Multipoint
Suitable for long distant links with multiple clients sharing public networks
Hidden node problem occurs
Hidden node problem
Occurs when the nodes do not “hear” each other due to obstacles (e.g. trees, buildings) between them
Avoided by extending the standard IEEE 802.11b with polling function
Wireless testbed
Equipment
COR-1100 OR-500 Antenna
VP470/24 Antenna
CA27/24 Antenna Cable Pigtails PC Card Gold S375 Cable IEEE 802.11b Radio equipment Low loss microwaves cables 2.4 GHz Antennas
Team working in Hanoi
Equipment configuration at the MoST office Working on the roof of the MoST building
Setting up antennas
1st test trial with bamboo stick 2nd test trial with steel tower
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