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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: E.Mondo@sirti.it
ANCIT WORKSHOPTorino, 30-31 March 1998
Summary
• Design workflow
• The Design Centre’s experience
• World-wide design
• Why a Telecommunication Operator needs high
quality design and as-builds drawings
• Conclusions
ANCIT WORKSHOPTorino, 30-31 March 1998
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:
ANCIT WORKSHOPTorino, 30-31 March 1998
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
ANCIT WORKSHOPTorino, 30-31 March 1998
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
ANCIT WORKSHOPTorino, 30-31 March 1998
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
ANCIT WORKSHOPTorino, 30-31 March 1998
RF Design
ANCIT WORKSHOPTorino, 30-31 March 1998
Copper network design
Copper network design includes:
• location of DPs and MUXes/ADMs
• copper cable dimensioning and route identification
• copper joints location• pair assignment
ANCIT WORKSHOPTorino, 30-31 March 1998
Fibre optic design
ANCIT WORKSHOPTorino, 30-31 March 1998
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
ANCIT WORKSHOPTorino, 30-31 March 1998
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,...)
ANCIT WORKSHOPTorino, 30-31 March 1998
DECT design
ANCIT WORKSHOPTorino, 30-31 March 1998
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
ANCIT WORKSHOPTorino, 30-31 March 1998
Civils design
ANCIT WORKSHOPTorino, 30-31 March 1998
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
ANCIT WORKSHOPTorino, 30-31 March 1998
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
ANCIT WORKSHOPTorino, 30-31 March 1998
Design Centre - Milan, Italy
ANCIT WORKSHOPTorino, 30-31 March 1998
Sirti’s OfferFeasibility
Studies andPlanning
Design
ProcurementEngineering andNetworks Construction
ManagementSystems
Maintenance
Telecommunications Telecommunications NetworksNetworks
ANCIT WORKSHOPTorino, 30-31 March 1998
ConstructionInstallationActivation
Synergies
Design
TechnicalDept.
SWDevelopment
Research
ANCIT WORKSHOPTorino, 30-31 March 1998
World-wide Design
ANCIT WORKSHOPTorino, 30-31 March 1998
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
ANCIT WORKSHOPTorino, 30-31 March 1998
Conclusions
We have seen:
• what is network design;• Sirti’s Design Centre organisation and experience;• the importance of a good design.