broadband access network design

ANCIT WORKSHOPTorino, 30-31 March 1998

Broadband Access Network Design

Enrico Mondo

Sirti S.p.A. - Design Centre

Via Galileo Galilei, 5 - 20060 Cassina de’ Pecchi (MI) - Italy

Tel: +39 2 66773865 - Fax: +39 2 66773894 - e-mail: [email protected]


Summary

• Design workflow

• The Design Centre’s experience

• World-wide design

• Why a Telecommunication Operator needs high

quality design and as-builds drawings

• Conclusions


Design workflow

•Criteria•Specifications•Symbology•Forecast Users•Cartography•Existing infrastructure

DESIGNDESIGNDOCUMENTATIONDOCUMENTATION

Maps acquisition or digitisation

Survey

System engineering & Network design

Civils design

Permits map preparation

Bill of MaterialsInvestments evaluation

>SIREN (Sirti owned CAD system application)>Workflow Management System

Networkdata base

Input:


Maps acquisition/digitisation

• Designing on paper leads to slow production, poor quality and problems in design updating

• Accuracy and precision of digitised maps must be verified during survey

• SW application must allow both automatic and manual measurements acquisition

• Map digitisation


SurveySurvey information includes:

• housecounting and MDU internal wiring

• definition of entry point to premises

• proposed cabinet sites• verification of digital map

information• inspection of existing

infrastructure• footways and carriageways

surface type• poles location and status

> Pen-PC can be used to store information on site


RF design

RF Design includes:

• Catchment areas definition

• Amplifiers and passives location

• Coaxial cable routes

• Signal calculation

• Powering

• Generation of geo-schematics and orthogonal schematics


RF Design


Copper network design

Copper network design includes:

• location of DPs and MUXes/ADMs

• copper cable dimensioning and route identification

• copper joints location• pair assignment


Fibre optic design


Fibre optic design

• Identification of existing cables and spare fibres

• Fibre cable routes definition

• Fibre joints location

• Fibre assignment

• Dimensioning of Optical Transmitters/Receivers

• Signal loss calculation

• Geo-schematic diagrams


PON + ADSL/HDSL/VDSL

• Data loading• Choice of MONU type• MONU cabinet location

according to survey• Analysis of existing copper

network

• Identification of copper network adjustments

• PON design (choice of OLTs, splitters definition and location, optical power budget and ranging calculation,...)


DECT design


DECT Design

• Design steps:– Draft design– Survey– Design adjustment– Documentation preparation and delivery

• Identification of RBS/RFP’s sites

• Complete radio coverage of the area must be guaranteed

• Use of portable pen-PC essential for handling information


Civils design


Civils design

• Design includes:> trench route> ducts dimensioning> location of pits, chambers and cabinets> location of swept-tees> overhead infrastructure> mains power connection

• Link to Database

• Optimisation essential to contain high costs of trench and other civil infrastructures


Bill of Materials

• Database link

• Automatic generation of complete list of materials for the entire network at any time during design

• Automatic cost evaluation of each single area and global

• Statistical analysis


Design Centre - Milan, Italy


Sirti’s OfferFeasibility

Studies andPlanning

Design

ProcurementEngineering andNetworks Construction

ManagementSystems

Maintenance

Telecommunications Telecommunications NetworksNetworks


ConstructionInstallationActivation

Synergies

Design

TechnicalDept.

SWDevelopment

Research


World-wide Design


Why a Telecom Operator needs high quality design and as-builds

drawings• Costs optimisation

• Database and graphical archives reliability and

efficiency

• Link to Network Management and Billing Systems

• Network upgrade or changeout


Conclusions

We have seen:

• what is network design;• Sirti’s Design Centre organisation and experience;• the importance of a good design.

broadband access network design

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