FRMCS

Future Railway Mobile Communication System

FRMCS in short

  • A first phase based on 5G in a special frequency band (n101, 1900 MHz ..1910 MHz), but basically transmission layer and application layer is separated: other transport (Wifi, Satellite, 6G…) can be used too
  • The current band (n100, around 900 MHz FDD) will be available too
  • FRMCS speaks about a wide range of functions, which are separated and independed from each
  • It is based on MCX (MC: mission critical) services MCPTT, MCDATA, MCVIDEO from “blue light” communitywith an additional number of functions
  • It should provide a unified solution for telecom on board (“Toba box”): one gateway for all operational communication on a vehicle.

FRMCS Status standardization – FRMCS V1

  • A first phase for the introduction of a new class A radio system has been completed with the FRMCS v1 specifications (as part of the TSI CCS 2023, FRMCS Baseline 0, «FRMCS Ready»).
  • Work on FRMCS v2 has started. It will be the baseline for larger FRMCS pilot projects such as MORANE 2.
  • Funkwerk is supporting this standardization of different levels and working groups.

The advantages of the FRMCS migration to current radio communication systems

Upgradeability for future requirements

  • Modular system architecture
  • Multi-Mode Systems:
    Analogue Radio (Class B) / GSM-R / 4G / 5G / FRMCS

Optimized antenna solutions

  • Use of one dual mode antenna for FRMCS and GSM-R
  • No additional antennas for FRMCS necessary

Upgradeability for future requirements

  • Operation of GSM-R and FRMCS via the existing HMI
  • Ease of use for operators

Upgradeability for future requirements

  • Further use of existing system components
  • Investment in additional FRMCS components only:
    Radio Modules / FRMCS Gateway

Should we upgrade our existing GSM-R solutions or wait for FRMCS?

For a railway operator, this is a critical question.
The short answer: Yes, continue to invest in GSM-R.

Your GSM-R network remains the backbone of mission-critical communication, and it will continue to play that role for many years—even after FRMCS is fully deployed.

While FRMCS is on the horizon, the rollout is gradual. Many specifications are still under development, and the overall timeline continues to shift. This means GSM-R will remain essential for the foreseeable future.

The good news? Most Cab Radios can be upgraded to FRMCS when the time comes.

Until then, stay operational and secure by:

  • Upgrading your GSM-R radio modules
  • Purchasing additional handheld units and spare parts
  • Ensuring your team has a reliable communication system in place

Don’t wait. Keep your fleet connected—today and tomorrow.

FRMCS trial and POC

5G-Racom DB & SNCF funding project – FRMCS multipath & GSM-R coexistence

  • Funkwerk is on-board partner in the 5G-RACOM funding project with DB and SNCF as consortium leaders.
  • To be designed, implemented and tested:
    – Multipath function with dedicated FRMCS and public mobile network (test field Erzgebirge).
    – Coexistence of GSM-R and FRMCS in the 900 MHz range (SNCF test field).
  • The project will start at the end of 2022 and is scheduled to run for 3 years until the end of 2025.

Current setup and equipment for FRMCS test – FGW-1 and CRLT.20

  • From the ETSI FRMCS and MCX plug tests 2022 and E2E Erzgebirge.
  • FGW-1 as gateway with two radio modules:
    – Basic functions OBAPP (pre-FRMCSv1) on GBit ethernet interfaces, auxiliary function via MQTT protocol, implementation of OBAPP according to FRMCS FFFIS v1 in 2023.
    – Basic functions Multipath TCP for multi-channel radio via both UEs in
    different networks, further development by 5GRACOM.
    – Own MCX/FRMCS client (without GUI) based on Linux for connection of data applications such as ETCS/ATO via MCData IPConn, further development of API according to Subset-037-3.
  • CRLT.20
    – Small cab radio with touch panel and audio interfaces.
    – Own MCX/FRMCS client based on Android, MCPTT (emergency and group calls, private calls) and MCData (SDS) according to 3GPP Rel-16 with support of functional alias.

Upcoming setup and equipment for FRMCS tests – MESA®26 with NR26-1 and MMIL

  • For development of FRMCS operating mode on MESA 26 and new 10″ touch panel MMIL for possible additional applications (from 2023).
  • NR26-1 as a mini gateway with a 5G radio module
    – Basic functions OBAPP (pre-FRMCSv1) on GBit ethernet interfaces, auxiliary function via MQTT protocol, implementation of OBAPP according to FRMCS FFFIS v1 in 2023.
    – Own MCX/FRMCS client on Linux basis for voice radio (feedback-free operating mode) as well as further virtual clients for connection of other loosely coupled data applications.

High Flexibility: 10“ – Operator terminal

  • MMIL as multifunctional control unit.
  • Integrated MCX/FRMCS client based on Linux for voice radio (MCPTT, MCData, MCVideo) with connection to gateway (OB )APP.
  • Powerful application processor for third-party application (also with access to a FRMCS network as loose coupled).
  • Touch operation, audio, Ethernet and Bluetooth interface.
  • Large 10″ Colour TFT Display

Funkwerk Train Antenna for FRMCS

  • Cooperation between Huber & Suhner and Funkwerk on the issue of migration from GSM-R to FRMCS.
  • The novel train radio antenna with two beam elements.
  • Separation of the two elements through horizontal and vertical polarization.
  • The system of train radio antenna and the Funkwerk MT5E radio module fulfils the requirements of the german technical recommendation Antennas (TE-ANT) of 56dB isolation between two GSM-R systems.
  • White paper to explain the facts in completion.