Ultra-Broadband for Cable Operators

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HSD Bandwidth Calculator

High Speed Data

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To provide a node serving 750 homes with a 30% penetration rate and an average 8 Mbps HSD service rate, the Operator will need to provide 18 Mpbs of downstream capacity to this node.

VOD Bandwidth Calculator

Video On Demand

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To provide a node serving 750 homes with a 30% penetration rate and an average 20% peak VOD concurrency rate, the Operator will need to provide 169 Mbps of narrowcast capacity to this node.

Important Notes

The average bandwidth requirements to be supplied to a Fiber Node (FN) for any service can be planned as the product H*P*C*B of four factors:

H = Households per fiber node

P = Penetration (subscribers per fiber node)

C = Concurrency Ratio (supplied concurrently active)

B = Bandwidth (peak bits per second)

HPCB applies to any service:

  • High Speed Data (HSD)
  • Voice over IP (VoIP)
  • Video-on-Demand (VOD) – MPEG or IPTV
  • Switched Broadcast (SB) – MPEG or IPTV

Concurrency C is the inverse of “overbooking”:

  • 1.0% C means 100-to-1 overbooking
  • Worldwide HSD C range: 0.75% to 2.0%
  • U.S. Average C: 1.0% (1000 4M subs per DS QAM)
  • Worldwide VOD C range: 10 to 25%
  • U.S. Average VOD C peak: 20%

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