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Some characteristics of satellite –can be rapidly deployed beyond the terrestrial networks –offers high bandwidths such as 2Mbps/512Kbps (asymetric is typical though not mandatory –suits most situations, including data distribution, Internet, streaming, voice –has inherent broadcast/multicast capabilities –requires some care in installation –is less used for highly interactive applications like gaming
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Rural Wings Training
Satellite Communications System Overview
Why satellite?
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7EL=0°EL=5°
EL=15°
EL=30°
EL=45°
S1
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WC
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BAS service on S1 beamof [email protected]°E.D/L Beam Pointing: 4.15°E; 6.92°N
TW T Power: 101.6 Watts.
Map of Receiver Antenna Size forDIG(41.5Mbps,OH=0.0Mbps, 3/4FEC,RS=188/204,QPSK)
(30.0 MSym/s) carrier withservice availability >= 99.50 %/yr.
0.75 m.
0.9 m.
1.2 m.References
Fri Dec 15 18:15:26 2006 \ pc5h114-2
Some characteristics of satellite– can be rapidly deployed beyond the terrestrial networks
– offers high bandwidths such as 2Mbps/512Kbps (asymetric is typical though not mandatory
– suits most situations, including data distribution, Internet, streaming, voice
– has inherent broadcast/multicast capabilities
– requires some care in installation
– is less used for highly interactive applications like gaming
Equipment - Outdoors
Satellite Dish & Transmitter
Wireless Antenna Omni-directional
Wireless Access Point
Equipment - Indoors
PC / LaptopSatellite ModemRadio Receivers
Connections
Coaxial
To the Internet
Satellite GatewayLocal Users
Wifi Connections
Satellite Hub
London
Host
Bewholme
Home
Bewholme
How does it work?What happens when you type a URL <CR>?
Server
Australia?
Request sent by satellite
Request sent by wifi
Request sent by cable
Page received by wifi
Page received by satellite
Page received by cable
Flexibility
+ Games terminals
Standards & Safety
– The equipment complies with all relevant standards and safety requirements
– These are too numerous to mention but are available on request
Performance
– What can you do with 1 Mbps
• Time to download a photo• Etc
– Sharing Bandwidth
• Don’t always see top speed• Shared just like ADSL• Use it at non-popular hours
– Characteristics
• E.g. batched surfing
