RADIOELECTRIC SITES CONTROL FOR
COMPLIANCE OF GSM OBILE CELLULAR
TELEPHONY NETWORKS IN COTE
D’IVOIRE
Workshop of ITU-T Study Group 5
Regional Group for Africa,
Cotonou, Benin, 19 July 2012
VALSCH-Consulting
DALLY BRICE LANDRY
Technical Manager
CONTENT

PURPOSE OF THE EXPERTISE

MISSION SCOPE

REFERENCES TO STANDARDS

STRUCTURES OVERVIEW

STRUCTURING OF THE MISSION

MISSION OPERATION

OBSERVATIONS

FAULTS PICTORIAL

EXPOSURES BY THE POPULATIONS

MEASUREMENTS PICTORIAL

REPORT AND SYNTHESIS


PURPOSE OF THE EXPERTISE

Control the compliance of GSM radioelectric sites to standards
requirement in the pylon implementation, electric security, buoying and
electromagnetic compatibility;

Abide by technical prespecriptions, namely perimeters for security and
control;

Enhance ATCI basic information over technical parameters for
radioelectric operating setups;
MISSION SCOPE

The campaign covers the networks for the following mobile cellular
telephony operators: ORANGE COTE D’IVOIRE (OCI), MTN-CI, COMIUM
(Koz), ATLANTIQUE TELECOM (Moov) and ORICEL (Green).
 REFERENCES TO STANDARDS

FOUNDATION
DTU P 18.702: French Regulations BAEL 91 regulations for design and the
calculation of armed concrete works following the method of neighbouring
countries.
DTU 13.12 : French Regulations for the calculation of surface foundations
 METALLIC STRUCTURE (PYLON)
DTU P 06.002 : French Regulations NV 65 – regulations that define snow and
wind impacts on constructions/ Eurocode I.
DTU P 22.701 : French Regulations CM 66 and addendum 80 – regulations of
calculation of steel constructions / Eurocode III.
DTU P 22.703 : Justification par le calcul de la sécurité des constructions règles de calculs des constructions à parois minces en acier.
NFP22-430, NFP22-460 à 469 (assemblages métalliques).
REFERENCES TO
STANDARDS
SYSTEM OF OVERHEAD SIGNALLING (BUOYING)
Recommendations of the International Civil Aviation Organization, OACI annex 14
chapter 6 (11/1999).
LIGHTNING SYSTEM
Rec IUT K56 : Protection of radio base stations against lightning discharges.
(01/2010).
Standards NFC 17-100 : Protection of structures against lightning (12/1997).
Standards NFC 15-100 : Electric Installations and Cables.
DIRECTIVES : IFC (international Financial Company) / WORLD BANK GROUP
Environmental, sanitary and security directives for Telecommunications
 INFRASTRUCTURES OVERVIEW
FREE STANDING PYLON
INFRASTRUCTURES OVERVIEW
Guyed Pylon
INFRASTRUCTURES OVERVIEW
MAST and TRIPOD
 MISSION STRUCTURING
No of
activity
01
Designation of activity
Development work
ATCI-VALSCH-OPERATORS OF CELLULAR
MOBILE TELEPHONY
02
Receiving of fragment for engineering
table and positioning of sites Mapping
03
Physical tracking for sites
Budget
(Day)
0,5
Working session, explanation on
the purpose and control points
related to the mission
0,5
-
-
Mission performance
04
05
06
0,5
Draft of mission report
Draft of synthesis report
3
3
Presentation of outcomes
07
Comments
0,5
Operation of the site
implementation
Visual controls and
measurement for IN SITU
compliance, site per site
Site per site,
Synthesis of standard gaps in
percentage, for each plate
covered
Plate per plate in line with the
Operator’s DESIGN RADIO
 MISSION OPERATION
POSITIONING OF SITES
(MAP Info / Google Earth)
MISSION’S OPERATION
 ENVIRONMENTAL CONTROL OF RADIOELECTRIC INFRASTRUCTURE
Such chapter deals with environmental verification for radioelectric sites, impacts
over environment/works done during the operational phases, rehabilitation and
re-development.
 PYLON
Such chapter deals with measurements and visual controls to verify the stability
of the infrastructure (aerial plants).
 SYSTEM OF AERIAL SIGNALLING
This chapter deals with the control of buoying operations night and day
according to the general prescriptions of the International Civil Aviation
Organisation (OACI) and local civil aviation authority.
MISSION’S OPERATION
 SYSTEM OF LIGHTNING
This chapter deals with the system control for combatting lightning to protect
Telecom installation equipment and neighbouring.
 RADIOELECTRIC DISCHARGE
This chapter is about the reading of true technical parameters, control of state
and evaluation of radioelectric discharge embarked on pylons and other
relevant structures.
 SYNTHESIS AND PRESCRIPTIONS
This chapter is about the synthesis of faults and recommendations for
rehabilitation and compliance of works.
MISSION’S DETAIL : CONTROL FOR INFRASTRUCTURE RADIOELECTRIC COMPLIANCE.docx
 OBSERVATIONS
1. ENVIRONEMENTAL CONTROL FOR RADIOELECTRIC INFRASTRUCTURE
 Zones Concept and Signagee
 Observations
•
•
•
Non existence of the security perimeter;
fault of security system in place;
Absence of appropriate signage.
OBSERVATIONS
ENVIRONMENT AND INSTALLATION
−
−
−
−
−
−
−
−
Dirty Site;
Oxydization of shelter at some points;
Intallation of cables outside CDCH ;
Knickpoint of walls and concretes;
Grids of non secured oxdized condensers;
Electric Enclosures not secured;
Fuel leakage under generator;
Extinguisher: expired use period.
2.PYLON
−
−
−
−
−
−
−
Preventers of end ofthe non existing higher ribs;
Reach of the main structure;
Advanced Oxydization of nuts and bolts;
Security Kit, oxydized, damaged or not exist;
Ladder and safety bow, oxydized, damaged or not exist;
Mechanic tensions not in compliance with prescriptions;
Vertical fault.
OBSERVATIONS
3.SYSTEM OF SIGNALLING
−
−
−
−
Deterioated Day buoying;
Non Operative Night Buoying;
Open junction box;
Non operative dusk to dawn switch
4.LIGHTNING PROTECTION
−
−
−
−
−
−
Measured value (isolated) higher to 10 Ohms ;
Old Lightning conductor;
Non Labelled Earthing Network;
Earthing system;
Absence of earthing system for some equipment;
Vandalized site, Site vandalisé , cut and robbed flats.
5. RADIOELECTRIC DISCHARGE
− Brake caliper, nuts and bolts, retransmission arms oxydized;
− Retransmission arms not galvanized;
− Antenna not well fixed / Design Radio not in compliance with
engineering table/space isolation not respected;
− Deteriorated leaktightness not well completed;
− Higher head discharge almost prescribed;
 FAULTS PICTORIAL

ENVIRONMENT AND INSTALLATION
- non existing perimeter for security, home activities on radioelectric site;
- Concrete cracking on radioelectric infrastructure.
PICTORIAL

PYLON
Balancing clamps not well aligned, nuts and bolts and oxydized safety kits
PICTORIAL

SYSTEM OF SIGNALLING
Non existing buoying, components of the night buoying system damaged
PICTORIAL

SYSTEM ANTI-LIGHTNING
Lightning conductor posts oxydized, ground rod oxydized, earthing network robbed, cut
and robbed strap copper, isolated measurement not in compliance with standard
prescription
PICTORIAL

RADIOELECTRIC DISCHARGE
Plug holes and GSM antenna fixing stirrup attachments damaged.
EXPOSURES BY THE POPULATIONS
-
Exposure to electromagnetic waves transmitting
sources (electrosmog) ;
-
Electrocution ;
-
Fire ;
-
Houses Destruction;
-
Aircraft crash (aeroplanes) ;
-
Destruction of home appliances;
-
Bad quality or interruption of communications;
-
Etc.
MEASUREMENTS PICTORIAL
Measurement of faulting vertical angle.
Measurement of mechanic tension of
Hauban cable.
Measurement of earth resistibility.
MEASUREMENTS PICTORIAL
REPORT AND SYNTHESIS
DVD-OCI 28-062012\001_RAPPORT_VC_ATCI_RX_OCI.xls
x
THANKS FOR YOUR ATTENTION