Radio Communications in Railway Tunnels

To avoid human disasters

Railway tunnels are one of the most dangerous confined spaces that thousands of people pass through every day. In case of accidents, the probability of human disaster is extremely high : in addition of the crash, fire or smoke can kill.

Reliable critical communications

In case of intervention, emergency services as Fire Brigades, Ambulances, Police, Army, need a robust and reliable radio coverage system to communicate inside railway tunnels with the same efficiency as outside. A destroyed train can be a fantastic metal heap that will block the communication if the electromagnetic field is not enough powerful.

Reliable operating communications

During maintenance and services operations, tunnel operators need an efficient private communication network to work quickly and safely to reduce traffic interruption.

ERTMS system

Modern communications include Railway Traffic Management System that requires full continuity and 99% reliability of GSM-R radio network.

Solutions for connectivity

Travellers don’t accept to be disconnected, and the railway tunnel operators must propose, in addition to safety and operating networks, continuity of services with WIFI and Cell Telephony.

Solutions for smart tunnels

As new technologies are implemented in railway tunnels to make them smarter, sensors and probes retrieve parameters such as pollution, noise, human presence. These wireless devices can communicate on the Internet of Things (IoT) networks.

Fully integrated solution

For each tunnel, SEE TELECOM offers tailored engineering deployments to retransmit all requested radio networks. RF signals are picked up, multiplexed, and converted into optical signals in the master station. The signals are then distributed by optical fibre down to the slave stations, Finally they are converted back into RF, amplified and multiplexed. Slave stations feed antennas made of single leaky feeders that covers the bores, as well as spots in technical rooms, emergency ways and safety rooms.

Long operational availability

SEE TELECOM can provide repairs and spare, equivalent, or new fully compatible parts, to guarantee continuity of services during at least 15 years. Along this lifecycle, innovations can be incorporated at the rhythm of the needs.

User-friendly monitoring software

SEE TELECOM has developed useful monitoring tools to be placed in the tunnel control room:

  • EMS : Web interface to monitor all devices that compose the system.
  • AMCE : Console based on Server / Clients architecture to monitor both locally and remotely the complete system, with gateways to SCADA via OPC-DA, OPC –UA.
  • BICE : Console based on Server / Clients architecture to dynamically and automatically insert emergency messages inside tunnels (1 or 2 tubes, multi-language, zones, etc…).