Casestudy rural FttH design

Rural FTTH design including Fiber Ring

FTTH case study , a rural area example, 12.000 homes, Scotland

Summary: FTTH network design and BOQ & BOM for a rural area.

Keywords: FTTH, rural, 12.000 homes, Scotland, ring structure, micro-ducts, P2P, 4 OF minimum cable size, Home=>DP=>Cabinet=>POP, optimization, Autocad Map3D, Google Earth, BOQ, BOM.

The network concept, micro-ducts and blown cables:
The network is based on direct-buried micro ducts and micro ducts installed in existing sewers. We planned 1×7/4mm micro-ducts from the street to the home. And planned 6&12×7/4mm micro-ducts in the streets for the 4 OF drop-cables. For the distribution network we use 7×14/10mm micro-ducts.

Per building: a 4/12/36 OF cable (with 1 live OF per FTU).

In the DP:
Typical amount of FTU (subscribers) per DP is 22 (+ 2 spare=24 total). Local requirement: P2P network with 4 OF per FTU all the way to the Cabinet.

A closed fiber ring
The POPs are to be connected by a closed fiber network ring for redundancy. Between the POP’s a 144 OF blown-cable is installed in one of the 7 micro ducts of the 50mm/7x12mm micro-ducts. This leaves 6x12mm micro ducts empty for future expansions. For the existing sewer system a 144 OF sewer cable will be applied.

About this case study:

The network design and the related Bill of Quantities are automatically made with our optimization software using advanced optimization algorithms. The optimization makes approx. 1 million calculations per 100 homes to calculate: the manipulation point areas and central positions and to design the best network routes. By doing this considerable savings are made for material and installations costs. This also results in less digging and less expensive road crossings.

The case study results:

  • Autocad (Map3D) dwg designs with:
    • Optimized manipulation point positions (DP, Cabinet, POP).
    • Optimized cable routes (drop, distribution, feeder & trunk).
    • Optimized micro-duct routes.
  • NetProject: BOQ and BOM, all quantities and costs.
    Case location
    A closer impression of the area.
    FTTH P2P micro-duct network concept with a maximum of 22 planned FTU/homes per DP and 288 FTU per Cabinet.
    Autocad(Map3D) No real data available. The design process starts with just an area-name.
    Autocad(Map3D) FTU locations / home entry-points and possible cable routes are created.
    Our NetOptimus software uses complex algorithms to create the cost optimized FTTH network design.
    The NetOptimus software lists all possible designs with installation & material costs.
    Autocad (Map3D): the FTTH network design for Kirkliston with cost optimized routes and road-crossings.
    Autocad (Map3D) Kirkliston network designs: drop, distribution and feeder level.
    FTTH ring-structure via Cramond, Queensferry and Kirkliston. A1 and A2: the Edinburgh City Airport connection needs to be planned. F1 and F2: two large farms that need to be included in the plans. S1 and S2: utilizing the existing sewer system.
    Ring structure, cables and ducts. A part of the trunk/ring trench is combined with the distribution network trench.
    FTTH BOQ reporting summary for Kirkliston
    FTTH BOQ reporting summary for the ring structure. The total ring length is estimated as: 24567m (16066 m trench + 8501m Sewer system). The Feeder ring \ Installation costs are mainly based on the Sewer cable installation costs.