Cabinets, networks and telecom GSM-R / RRH

Grolleau is assisting the SNCF with their deployment of the GSM-R network (via Synerail) and therefore contributes to the modernisation of its global communication system.

  • A component of the European Rail Traffic Management System (ERTMS),
  • Telecommunications standard for over 20 European countries (opening of networks, interoperability),
  • Private mobile network infrastructure, wireless RF (Media of the European train signalling/control system ETCS).
Antenne GSM

Operating stages

GSM-R (global system for mobile communication – railways)

  1. Wireless/radio communication Transmission or Reception:
    DATA: Control of trains’ position & speed, VOICE: Calls,
  2. GSM-R cells, BTS radio sites (cabinets, pylons, etc.):
    15,000 Km of tracks covered, including 1000 sites (Grolleau’s annex bays, 2011-2017),
  3. Data Transmission Network:
    TRANSmission Network from BTS to BTS (cells/platform sectors) & to the core network. TRANSport network in copper, terrestrial, optical fibre.
  4. Base Station Controller (BTS), BSC:
    Acts as controller, traffic switcher in the plate, (between BTS cells) & to the other plates.  
  5. Core network, NSS:
    Databases with user identity & location, communication routing network switch.
  6. Instant delivery of communication:
    Entering / leaving on fixed infrastructure (station, control or operation centre, etc.) & to BSC.

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Annex bay (2018 generation)

Functions

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Conveyance to the power grid:
Connection to the energy supplier's supply terminal
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Conveyance to the transmission link:
Connection & hosting of transmission link equipment (SNCF wire, SDSL FO wire, RF),
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Power supply (normal, emergency / battery backup):
BTS 6K GSM-R Kpasch KIT (DM & RRH modules), transmission and utility equipment
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Integration of the DM module:
Part of the BTS 6K GSM-R kit. Equipment that manges communication between radio transmitters & GSM-R networks.

Main characteristics

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Dimension (LxHxD) :
2040 x 2037 x 722 mm
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Telecom format:
19’’ / 30 U (useful depth 500 mm)
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Operating temperature:
-20°C à 45°C
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Protection factor :
IP55 (double-skin)
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Power supply:
TMain low-voltage switchboard 230 VAC Class II with: - Inverter generator set - Utilities: internal heating, site lighting, maintenance socket
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Electrical distribution:
48 Volts DC via Electrical distribution device 2x3KWatts: - Flatpack 5U Eltek - Netsure 501 Emerson 230 Volts AC ripple current via inverter: - 3 Backup battery branches from 105 to 180 Ah / branch

3 columns

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ENERGY + KIT BTS 6K GSM-R / DM module
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CUSTOMER EQUIPMENT + TRANS GSM R
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BATTERY BACKUP

RRH bay

Functions

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Radio link connection to the pylon / Antennas:
Ensure the incoming / outgoing radio link (RRH "amplifier module")
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Integration of Radio RRH equipment:
Operational constraints of 24/7 access by a single person, not compatible with integration on a pylon (night intervention security)
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Protection of RRH modules:
Restricted access to RF, FO etc. jumpers

Main characteristics

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Dimension (LxHxD) :
700 x 2037 x 722 mm
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Operating temperature :
-20°C à 45°C
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Protection factor :
IP55 (double-skin)
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Weight :
# 200 Kg - 2+2 RRH max of 40 Kg
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Power supply :
Arriving from the 2018 annex bay: - 230 Vac: internal lighting, maintenance socket - 48Vdc: RRH radio module
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Equipment Integration :
Kapsch RRH Radio (BTS kit, etc.) : - Connection to antennas by RF band - Connection to the DM module in the annex bay by FO & Copper (A-Bis) - Integrated on site by Vinci Energie / Axians infrastructure teams

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GSM-R / RRH products

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