Broadband access network deployment in Brasil: toward a low cost HFC implementation.

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Broadband access network deployment in
Brasiltoward a low cost HFC implementation.
Workshop on Access Network Construction and
Installation Techniques (ANCIT) CSELT, Turin - 30
- 31 March 1998

• M. Giansante and A.C.G. Bordeaux R.
• CPqD_TELEBRÁS
• J. Davide Felix
• TELEGOIÁS

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TELEBRÁS SYSTEM - Organisation Chart
27 TELCOs
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(No Transcript)
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Optical fibres in the access network
TELEGOIÁS
TELEBRÁS

• 1993 _ Initial deployment of DLCs
• 1994 _The bidding process for HFC network
  construction was started
• 1995 _ Regulatory changes in CATV market
• 1996 _ The deal with the HFC supplier was
  made.

• 1994/5_Technical Advisory for the first
  generation FITL systems (point-to-point such as
  Digital Loop Carrier)
• 1996/7_Technical Advisory for Hybrid Fibre/Coax
  networks.

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HFC TELEBRÁS considerationsMain driving forces

• Demand for CATV services
• New revenue opportunities
• Possibility to provide POTS
• Becoming more competitive to face new players in
  the near future.

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HFC TELEBRÁS considerationsMain characteristics
of the Network Planning

• HFC and FITL transceptors integrated at the same
  Service Access Point
• Whole number of earlier POTS serving areas
• Fibre node not bigger than 1920 hp
• Wavelength transmission requirements in 1.3?m and
  1.55?m.

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HFC TELEGOIÁS case

• The regulatory changes X CATV purpose
• FITL/HFC integration in the same cabinet
• Coverage of the coax distribution network
• Cost effectiveness 440 hp X 1920 hp fibre nodes
  
• 1.3 ?m as a solution for better flexibility.

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Network Topology
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CMS Architecture
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CDI Architecture
FROM THE FIBER NODES
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Fibre Node Layout
OPTICA FIBER
FIBRA
440 HP
ÓPTICA
1310nm
FIBER NODE LEG
1310nm
AMPLIFIER
ONU
RXO
COUPLER
POWER SUPPLY
110 HP
110 HP
FOR OTHER LEG
110 HP
110 HP
AMPLIFIER
TAP
FOR OTHER LEG
FIBER NODE LEG
BUILDING
COUPLER
AMPLIFIER
TAP
HOUSE
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Network Cost Breakdown
the civil works and enclosure costs are
diluted in the others
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Conclusions

• The regulatory changes forced TELEGOIÁS to find
  other killer application
• The final network was determinated by the
  Installed First Cost
• Changes on the earlier project saved 25 on the
  final network cost per home-passed, allowing the
  growth of the plant from 108,407 hp to 211,084
  hp
• Therefore, higher service penetration and
  performance can be reached from now on.