Delivering Broadband Services over Satellite

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Delivering Broadband Services over Satellite
Anggoro K. Widiawan Centre for Communication
Systems Research University of Surrey Guildford,
Surrey, UK
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Outline

• Market and Service Issues
• Critical Issues
• Possible Solutions

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Service Requirements

• Future services are expected to support
• Higher Data Rate
• Wider Connectivity
• (Regional to Global)
• More Mobility

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Major Broadband Carriers

• xDSL
• Cable Modem
• Fibre Optic

• Wireless LAN
• Wireless PAN
• Wireless Local Loop
• 3G and beyond 3G Mobile Systems
• DVB and DAB
• HAPS
• Satellites

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Delivering Broadband over Satellite
HAPS
Wired Networks
Satellite can be positioned as
Broadband Access
Capacity Connectivity Support
GPRS/EDGE
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Outline

• Market and Service Issues
• Critical Issues
• Possible Solutions

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Satellite Characteristics

• GEO
• Regional Global Coverage
• Enables Continues access and Efficient
  Broadcast/Multicast services
• But it has link budget disadvantage and high
  delay

• LEO
• Global Coverage
• To enable continues access, complete
  constellation is required
• Much lower delay and path loss (compared to GEO)
  but suffered by large doppler shifts and some
  other channel characteristics

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Critical Issues

• High Propagation Loss (GEO)
• High Propagation Delay (GEO)
• High Complexity (LEO)

Lead to High Terminal and Service Delivery Cost
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VSAT Terminal Cost Sample Review
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Outline

• Market and Service Issues
• Critical Issues
• Possible Solutions

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Possible Solutions

• Transmission Technology Improvement to pull down
  the costs, for example
• Resource Management
• Network Protocols
• Air Interface
• Antenna (Ground and Space Segment)
• Efficient energy supply
• Efficient inter-satellite links Implementation
• Move forward regenerative payload (On Board
  Processing)
• Multiple spot beam coverage (GEO case) to
  optimise the bandwidth

Interoperability with other systems
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SATIN Approach Mobile
 
  Note 1. Broadcast Applications including Data
and Video Services (Sport, News, etc.) are
specified with data rates up to 400Kbps.
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Conclusion

• Satellite communications are expected to play an
  important role in broadband market
• Improvements such as network protocol, air
  interface, antenna technology, efficient energy
  supply, power amplifier, the use of
  inter-satellite links, multi-spot beam antenna
  and OBP may potentially strengthen its role