PNGARNet

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PNGARNet

• Satellite Communication for Universities and
  Research Institutes A New Design
• Peggy Kegana
• DWU - PNGUpdate 15th April 2008

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PNGARNet

• Implementation - 2008
• DWU IT Services

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Very Small Aperture Terminal (VSAT)
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3 M Vanuatu
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Satellite in Geostationary Orbit 38586 km
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Geostationary Orbits

• The speed and height of these satellites allow
  them to remain synchronised above a specific
  location on the earth at all times.
• Time delays of about 0.5 sec are experienced in
  back and forth transmissions which can be a
  problem for time-critical applications

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Transponder

• Receiver tuned to uplink band
• Frequency shifter to change frequency to downlink
  band
• Power amplifier
• Electric power from solar cells on flat panels

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ASIASAT 4 Footprint (Area covered by downlink)
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Ground Station, Satellite, Hub
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Typical Client Side
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Main Hub Speedcast - Hong Kong
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Internet Connection
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Speedcast / ASIASat NOC Teleport
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Hong Kong Teleport

• Hong Kong as a central convergent point for the
  Internet
• Convergence of submarine cables see next slide
• Only 2/3 hops to US and UK improving access to
  WWW
• Oceanic Broadband Solutions to serve as ISP for
  PNGARNet

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Colocated Server Farm at Hong Kong Hub (NOC or
Data Centre)

• Remote administration from DWU IT Services
• Hardware maintained on-site
• Hardware Redundancy
• Clustering used to provide Load Balancing and
  Fault Tolerance

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Internet Access from Hong Kong Optical Fibre
Submarine Cables
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Server side
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Colocated Server Farm at Hong Kong Hub
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NOC / Data Centre
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Equipment Racks
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NOC / Data Centre