FRMCS standards and specifications

FU-7120 — FRMCS Functional Requirements Specification

v2.1.0Evidenced Issue

Describes the communication functions that FRMCS is intended to provide for railway operations. Starting point for the derivation of technical requirements and the assessment of functional coverage.

The ERA reference list for Baseline 0 lists version 1.0.0; this card describes the more recent UIC issue.

Original retrievedPDF retrieved from UIC's document server (img1.uic.org); cover page shows reference, version and date 29 April 2025. uic.org itself showed a maintenance page.

AT-7800 — FRMCS System Requirements Specification

v2.1.0Evidenced Issue

Translates the functional requirements into technical system requirements. Describes architectural principles, system functions and mechanisms for the interaction of FRMCS components.

Published UIC issue; not to be equated with version 1.0.0 in the ERA directory for Baseline 0.

Original retrievedPDF retrieved from UIC's document server (img1.uic.org); cover page shows reference, version and date 30 April 2025. uic.org itself showed a maintenance page.

TOBA-7510 — On-Board FRMCS Functional Requirements Specification

v2.1.0Evidenced Issue

Defines the functional requirements for FRMCS on the vehicle. Describes which tasks the on-board system must fulfil and how it should support the applications on the train.

Original retrievedPDF retrieved from UIC's document server (img1.uic.org); cover page shows reference, version and date 25 April 2025. uic.org itself showed a maintenance page.

FFFIS-7950 — FRMCS Form Fit Functional Interface Specification

v2.1.0Evidenced Issue

Specifies the interfaces between railway applications and FRMCS on the on-board and infrastructure side. Creates a common basis for the integration of applications and communication systems.

Document history on printed page 4: Version 2.1.0 dated 29 April 2025.

Original retrievedUIC PDF retrieved; document history on printed page 4 identifies Version 2.1.0 dated 29 April 2025.

FIS-7970 — FRMCS Functional Interface Specification

v2.1.0Evidenced Issue

Describes functional procedures and call flows for FRMCS applications. Links the operational requirements with the technical interaction of the communication services.

Original retrievedPDF retrieved from UIC's document server (img1.uic.org); cover page shows reference, version and date 30 April 2025. uic.org itself showed a maintenance page.

FU-7100 — FRMCS User Requirements Specification

v5.0.0Evidenced Issue

Collates the requirements of railway users for the future communication system. Provides the operational starting point for the subsequent functional and technical specifications.

Original retrievedPDF retrieved from UIC's document server (img1.uic.org); cover page shows reference, version and date 19 February 2020. uic.org itself showed a maintenance page.

MG-7900 — FRMCS Use Cases

v2.1.0Evidenced Issue

Describes use cases for railway communications. Illustrates the operational situations from which the requirements for FRMCS are derived.

Original retrievedPDF retrieved from UIC's document server (img1.uic.org); cover page shows reference, version and date 24 February 2023. uic.org itself showed a maintenance page.

TOBA-7515 — Migration Variants for Existing ETCS and Cab Radio On-Board Units

v1.2Evidenced Issue

Investigates migration options for existing ETCS and train radio equipment on the vehicle. Supports the assessment of how existing equipment can be included in the transition to FRMCS.

Original retrievedOfficial UIC mirror PDF retrieved; cover and document history identify Version 1.2 dated 14 November 2019.

TOBA-7540 — FRMCS Telecom On-Board System: Architecture Migration Scenarios

v1.0.0Evidenced Issue

Describes architectural scenarios for the migration of the on-board telecommunication system. Helps to consider transition states between existing train radio equipment and FRMCS in a structured manner.

Original retrievedUIC PDF retrieved; cover and document history identify Version 1.0.0 dated 15 April 2020. Annex A on printed page 22 embeds TOBA-7515 Version 1.2.

FRMCS-Transition — Technical Guidelines

v1.0Evidenced Issue

Technical guideline for applying FRMCS to 4G networks. Classifies transition options where 5G deployment is constrained, including frequency availability, deployment planning and migration.

Original retrievedPDF retrieved from UIC's document server (img1.uic.org); cover page shows reference, version and date 19 July 2024. uic.org itself showed a maintenance page.

ETSI TS 103 764 — System Architecture

v1.1.1Evidenced Issue

Describes the overall FRMCS system architecture and the relationships between its components. Serves as an introduction to the complementary specifications for transport, services and interfaces.

Original retrievedETSI deliverable PDF retrieved; number and version match the address.

ETSI TS 103 765-1 — Building Blocks and Functions — Part 1: Transport Stratum

v1.1.1Evidenced Issue

Defines the transport layer with radio access, core network and transport functions. Addresses, among other things, mobility, roaming and Quality of Service for the transmission of FRMCS communication.

Original retrievedETSI deliverable PDF retrieved; number and version match the address.

ETSI TS 103 765-2 — Building Blocks and Functions — Part 2: Service Stratum

v1.1.1Evidenced Issue

Defines the service layer based on Mission Critical Services and associated SIP/IMS functions. Describes their interfaces, prioritisation, identities and security aspects.

Original retrievedETSI deliverable PDF retrieved; number and version match the address.

ETSI TS 103 765-3 — Building Blocks and Functions — Part 3: Train On-Board Functions and Interfaces

v1.1.1Evidenced Issue

Specifies functions and interfaces of the on-board FRMCS system. Details how the components on the train cooperate and fit into the overall architecture.

Original retrievedETSI deliverable PDF retrieved; number and version match the address.

ETSI TS 103 765-4 — Building Blocks and Functions — Part 4: Trackside Functions and Interfaces

v1.1.1Evidenced Issue

Specifies functions and interfaces of the infrastructure-side FRMCS components. Describes the technical integration of the trackside applications and system functions.

Original retrievedETSI deliverable PDF retrieved; number and version match the address.

ETSI TS 103 765-5 — Building Blocks and Functions — Part 5: User Equipment Capabilities

v1.1.1Evidenced Issue

Defines the required capabilities of FRMCS user equipment. Provides a technical reference for the selection and evaluation of compatible User Equipment.

Original retrievedETSI deliverable PDF retrieved; number and version match the address.

ETSI TS 103 792 — Interworking with GSM-R

v1.1.1Evidenced Issue

Specifies the interworking of FRMCS and GSM-R. Describes the implementation of communication flows at the system boundary for operation during migration.

Original retrievedETSI deliverable PDF retrieved; number and version match the address.

ETSI TS 103 793 — Radio Characteristics

v1.1.1Evidenced Issue

Defines FRMCS-specific radio requirements and measurement procedures for base stations and user equipment. Specifically addresses operation in the 5G bands n100 and n101.

Original retrievedETSI deliverable PDF retrieved; number and version match the address.

ETSI TS 104 069-1 — Services over 5G: Application Conformance Specification for Client

v1.1.1Evidenced Issue

Defines conformance tests for the client side of FRMCS services over 5G. Enables systematic testing of the specified application behaviour.

Original retrievedETSI deliverable PDF retrieved; number and version match the address.

ETSI TS 104 069-2 — Services over 5G: Application Conformance Specification for Server

v0.0.21 draftEvidenced draft issue

The draft describes conformance tests for the server side of FRMCS services over 5G and complements the client tests with the specified behaviour of the service servers.

ETSI lists V0.0.21 as a final draft registered by the Secretariat. No V1.1.1 publication is recorded.

Original retrievedETSI work-item record retrieved: final draft V0.0.21 was registered by the ETSI Secretariat on 10 July 2026; no publication is recorded.

ETSI TS 104 070 — FRMCS Conformance Specification: Test Applicability and ICS Pro Forma

v1.1.1Evidenced Issue

Defines the declaration of supported implementation features and the applicability of conformance tests. Helps to determine the required tests appropriate to the functional scope of an implementation.

Original retrievedETSI deliverable PDF retrieved; number and version match the address.

ETSI TS 103 564 — Plugtests Scenarios for Mission Critical Services

v1.6.1Evidenced Issue

Describes interoperability scenarios for Mission Critical Services, including railway-related test cases. Serves as a basis for multi-vendor MCX and FRMCS plugtests.

Updated from the previous list: issue 1.6.1 is officially documented. No assurance that this is the latest issue.

Original retrievedETSI deliverable PDF retrieved; number and version match the address.

ETSI TR 103 333 — System Reference Document: GSM-R Networks Evolution

v1.1.1Evidenced Issue

Describes the evolution of railway communications and the associated frequency requirements. Historical basis for the discussion of spectrum and coexistence in the FRMCS context.

Published study; not a standalone implementation or conformance specification.

Original retrievedETSI deliverable PDF retrieved; number and version match the address.

ETSI TR 103 459 — FRMCS — Study on System Architecture

v1.2.1Evidenced Issue

Investigates architectural approaches, system components and migration scenarios for FRMCS. Documents the conceptual considerations prior to the later published technical system specifications.

Published study; not a standalone implementation or conformance specification.

Original retrievedETSI deliverable PDF retrieved; number and version match the address.

ETSI TR 103 554 — Next Generation Communication System: LTE Radio Performance Simulations and Evaluations in Rail Environment

v1.1.1Evidenced Issue

Investigates LTE as a possible radio access for railway communications. The publication documents a historical state of investigation and does not define a current FRMCS target architecture.

Published study; not a standalone implementation or conformance specification.

Original retrievedETSI deliverable PDF retrieved; number and version match the address.

ETSI TR 103 554-1 — Radio Performance Simulations and Evaluations in Rail Environment — Part 1: LTE

v1.2.1Evidenced Issue

Evaluates LTE radio performance based on railway-specific simulations. Provides technical principles on performance and limitations under railway operating conditions.

Published study; not a standalone implementation or conformance specification.

Original retrievedETSI deliverable PDF retrieved; number and version match the address.

ETSI TR 103 554-2 — Radio Performance Simulations and Evaluations in Rail Environment — Part 2: NR

v1.1.1Evidenced Issue

Investigates 5G New Radio scenarios in the railway environment for 900 MHz FDD and 1900 MHz TDD. Documents simulation assumptions, results and railway-specific limitations.

Published study; not a standalone implementation or conformance specification.

Original retrievedETSI deliverable PDF retrieved; number and version match the address.

ETSI TR 103 768 — FRMCS — Interworking Study with Legacy Systems

v1.1.1Evidenced Issue

Investigates the interworking of FRMCS with existing communication systems. Provides conceptual principles for the later technical specification of GSM-R interworking.

Published study; not a standalone implementation or conformance specification.

Original retrievedETSI deliverable PDF retrieved; number and version match the address.

ETSI TR 103 791 — FRMCS — Terminology for FRMCS Specifications

v1.1.1Evidenced Issue

Collates terms and terminology of the FRMCS specifications. Supports a common understanding across architecture, interface and function documents.

Published study; not a standalone implementation or conformance specification.

Original retrievedETSI deliverable PDF retrieved; number and version match the address.

ETSI TR 103 865 — FRMCS — Radio Performance Aspects

v1.1.1Evidenced Issue

Investigates technical aspects of FRMCS radio performance. Complements the system specifications with background knowledge for the assessment of radio transmission in the railway environment.

Published study; not a standalone implementation or conformance specification.

Original retrievedETSI deliverable PDF retrieved; number and version match the address.

ETSI TR 104 006 — FRMCS — Study on Onboard Radio Interface

v1.1.1Evidenced Issue

Investigates the on-board interface between the FRMCS radio module and other on-board functions. Provides a basis for the technical design of OBRAD.

Published study; not a standalone implementation or conformance specification.

Original retrievedETSI deliverable PDF retrieved; number and version match the address.

3GPP TS 22.289 — Mobile Communication System for Railways

v19.0.1 · Release 19Evidenced Issue

Defines requirements for mobile communications for railways. Describes railway-specific communication needs and performance requirements as a basis for technical standardisation.

ETSI publication: TS 122 289. The release version to be applied for a project must be specified separately.

Original retrievedETSI deliverable PDF retrieved; number and version match the address.

3GPP TS 23.289 — Mission Critical Services over 5G System; Stage 2

v19.7.0 · Release 19Evidenced Issue

Describes the architecture and procedures for Mission Critical Services over the 5G system. Connects the MCX services with the capabilities of the 5G network.

Also evidenced: Version 18.11.0, published on 01 Oct 2025. Release 19 is not automatically the FRMCS project baseline.

Original retrieved3GPP archive lists 23289-j70.zip (V19.7.0), file dated 2025/09/29 — an upload date, not a formal publication date.

3GPP TS 23.228 — IP Multimedia Subsystem — Stage 2

v18.9.0 · Release 18Issue referenced in the FRMCS Service Stratum

Describes the architecture of the IP Multimedia Subsystem. Reference for IMS functions in the FRMCS Service Stratum.

Version from the normative references of ETSI TS 103 765-2 V1.1.1. The month is the ETSI publication month of the exact issue, not the original 3GPP approval date.

Original retrievedOriginal ETSI exact-version PDF cover retrieved; it identifies publication month Apr 2025. This is the ETSI publication month, not the original 3GPP approval date. The version is cited in ETSI TS 103 765-2 V1.1.1.

3GPP TS 23.280 — Common Functional Architecture to Support Mission Critical Services — Stage 2

v18.12.0 · Release 18Issue referenced in the FRMCS Service Stratum

Defines the common architecture for Mission Critical Services. Basis for the interaction of cross-service MCX functions.

Version from the normative references of ETSI TS 103 765-2 V1.1.1. The month is the ETSI publication month of the exact issue, not the original 3GPP approval date.

Original retrievedOriginal ETSI exact-version PDF cover retrieved; it identifies publication month Apr 2025. This is the ETSI publication month, not the original 3GPP approval date. The version is cited in ETSI TS 103 765-2 V1.1.1.

3GPP TS 23.379 — Functional Architecture and Information Flows to Support MCPTT — Stage 2

v18.12.0 · Release 18Issue referenced in the FRMCS Service Stratum

Describes the architecture and information flows for Mission Critical Push to Talk. Basis of MCPTT voice communication.

Version from the normative references of ETSI TS 103 765-2 V1.1.1. The month is the ETSI publication month of the exact issue, not the original 3GPP approval date.

Original retrievedOriginal ETSI exact-version PDF cover retrieved; it identifies publication month Apr 2025. This is the ETSI publication month, not the original 3GPP approval date. The version is cited in ETSI TS 103 765-2 V1.1.1.

3GPP TS 24.379 — MCPTT Call Control — Protocol Specification

v18.10.0 · Release 18Issue referenced in the FRMCS Service Stratum

Specifies the call control for Mission Critical Push to Talk. Defines the protocol behaviour of the involved components.

Version from the normative references of ETSI TS 103 765-2 V1.1.1. The month is the ETSI publication month of the exact issue, not the original 3GPP approval date.

Original retrievedOriginal ETSI exact-version PDF cover retrieved; it identifies publication month Mar 2025. This is the ETSI publication month, not the original 3GPP approval date. The version is cited in ETSI TS 103 765-2 V1.1.1.

3GPP TS 23.282 — Functional Architecture and Information Flows to Support MCData — Stage 2

v18.10.0 · Release 18Issue referenced in the FRMCS Service Stratum

Describes the architecture and information flows of Mission-Critical Data communication. Basis for MCData services within FRMCS.

Version from the normative references of ETSI TS 103 765-2 V1.1.1. The month is the ETSI publication month of the exact issue, not the original 3GPP approval date.

Original retrievedOriginal ETSI exact-version PDF cover retrieved; it identifies publication month Apr 2025. This is the ETSI publication month, not the original 3GPP approval date. The version is cited in ETSI TS 103 765-2 V1.1.1.

3GPP TS 24.282 — MCData Signalling Control — Protocol Specification

v18.10.0 · Release 18Issue referenced in the FRMCS Service Stratum

Specifies the signalling control for MCData. Details the protocol flows of Mission-Critical Data communication.

Version from the normative references of ETSI TS 103 765-2 V1.1.1. The month is the ETSI publication month of the exact issue, not the original 3GPP approval date.

Original retrievedOriginal ETSI exact-version PDF cover retrieved; it identifies publication month Mar 2025. This is the ETSI publication month, not the original 3GPP approval date. The version is cited in ETSI TS 103 765-2 V1.1.1.

3GPP TS 24.582 — MCData Media Plane Control — Protocol Specification

v18.2.0 · Release 18Issue referenced in the FRMCS Service Stratum

Defines protocols for controlling the MCData media plane. Complements the signalling specification for data transmission.

Version from the normative references of ETSI TS 103 765-2 V1.1.1. The month is the ETSI publication month of the exact issue, not the original 3GPP approval date.

Original retrievedOriginal ETSI exact-version PDF cover retrieved; it identifies publication month May 2024. This is the ETSI publication month, not the original 3GPP approval date. The version is cited in ETSI TS 103 765-2 V1.1.1.

3GPP TS 23.281 — Functional Architecture and Information Flows to Support MCVideo — Stage 2

v18.9.0 · Release 18Issue referenced in the FRMCS Service Stratum

Describes the architecture and information flows of Mission Critical Video. Technical basis for MCVideo services.

Version from the normative references of ETSI TS 103 765-2 V1.1.1. The month is the ETSI publication month of the exact issue, not the original 3GPP approval date.

Original retrievedOriginal ETSI exact-version PDF cover retrieved; it identifies publication month Jan 2025. This is the ETSI publication month, not the original 3GPP approval date. The version is cited in ETSI TS 103 765-2 V1.1.1.

3GPP TS 24.482 — Mission Critical Services Identity Management — Protocol Specification

v18.0.1 · Release 18Issue referenced in the FRMCS Service Stratum

Specifies the identity management for Mission Critical Services. Reference for the administration and use of MCX identities.

Version from the normative references of ETSI TS 103 765-2 V1.1.1. The month is the ETSI publication month of the exact issue, not the original 3GPP approval date.

Original retrievedOriginal ETSI exact-version PDF cover retrieved; it identifies publication month May 2024. This is the ETSI publication month, not the original 3GPP approval date. The version is cited in ETSI TS 103 765-2 V1.1.1.

3GPP TS 24.484 — Mission Critical Services Configuration Management — Protocol Specification

v18.7.0 · Release 18Issue referenced in the FRMCS Service Stratum

Defines protocols for the configuration management of Mission Critical Services. Basis for the provisioning of MCX configurations.

Version from the normative references of ETSI TS 103 765-2 V1.1.1. The month is the ETSI publication month of the exact issue, not the original 3GPP approval date.

Original retrievedETSI's official publication register was retrieved and identifies this exact version and publication month (Oct 2024); the linked exact-version PDF was inaccessible or too large. The month is not the original 3GPP approval date. The version is cited in ETSI TS 103 765-2 V1.1.1. · ETSI publication register

3GPP TS 33.180 — Security of the Mission Critical Service

v18.1.0 · Release 18Issue referenced in the FRMCS Service Stratum

Defines security mechanisms for Mission Critical Services. Central security reference for the MCX service layer.

Version from the normative references of ETSI TS 103 765-2 V1.1.1. The month is the ETSI publication month of the exact issue, not the original 3GPP approval date.

Original retrievedOriginal ETSI exact-version PDF cover retrieved; it identifies publication month May 2024. This is the ETSI publication month, not the original 3GPP approval date. The version is cited in ETSI TS 103 765-2 V1.1.1.

3GPP TS 24.229 — IP Multimedia Call Control Protocol Based on SIP and SDP — Stage 3

v18.7.0 · Release 18Issue referenced in the FRMCS Service Stratum

Specifies the SIP- and SDP-based control of IP multimedia sessions. Protocol reference for corresponding FRMCS service functions.

Version from the normative references of ETSI TS 103 765-2 V1.1.1. The month is the ETSI publication month of the exact issue, not the original 3GPP approval date.

Original retrievedOriginal ETSI exact-version PDF cover retrieved; it identifies publication month Jan 2025. This is the ETSI publication month, not the original 3GPP approval date. The version is cited in ETSI TS 103 765-2 V1.1.1.

3GPP TS 33.203 — 3G Security — Access Security for IP-Based Services

v18.1.0 · Release 18Issue referenced in the FRMCS Service Stratum

Describes the access security for IP-based services. Complements the security requirements of IMS-related communication.

Version from the normative references of ETSI TS 103 765-2 V1.1.1. The month is the ETSI publication month of the exact issue, not the original 3GPP approval date.

Original retrievedOriginal ETSI exact-version PDF cover retrieved; it identifies publication month Jul 2024. This is the ETSI publication month, not the original 3GPP approval date. The version is cited in ETSI TS 103 765-2 V1.1.1.

3GPP TS 23.283 — Mission Critical Communication Interworking with Land Mobile Radio Systems

v18.2.0 · Release 18Issue referenced in the FRMCS Service Stratum

Describes the interaction between Mission-Critical communication and Land Mobile Radio systems. Reference for cross-system communication functions.

Version from the normative references of ETSI TS 103 765-2 V1.1.1. The month is the ETSI publication month of the exact issue, not the original 3GPP approval date.

Original retrievedOriginal ETSI exact-version PDF cover retrieved; it identifies publication month Apr 2025. This is the ETSI publication month, not the original 3GPP approval date. The version is cited in ETSI TS 103 765-2 V1.1.1.

3GPP TS 23.002 — Network Architecture

v18.0.0 · Release 18Issue referenced in the FRMCS Service Stratum

Defines fundamental mobile network architectures and relationships of their components. Architectural reference of the FRMCS Service Stratum.

Version from the normative references of ETSI TS 103 765-2 V1.1.1. The month is the ETSI publication month of the exact issue, not the original 3GPP approval date.

Original retrievedOriginal ETSI exact-version PDF cover retrieved; it identifies publication month Apr 2024. This is the ETSI publication month, not the original 3GPP approval date. The version is cited in ETSI TS 103 765-2 V1.1.1.

3GPP TS 23.203 — Policy and Charging Control Architecture

v18.0.0 · Release 18Issue referenced in the FRMCS Service Stratum

Describes the architecture for Policy and Charging Control. Is referenced in the FRMCS Service Stratum as a technical basis.

Version from the normative references of ETSI TS 103 765-2 V1.1.1. The month is the ETSI publication month of the exact issue, not the original 3GPP approval date.

Original retrievedOriginal ETSI exact-version PDF cover retrieved; it identifies publication month Apr 2024. This is the ETSI publication month, not the original 3GPP approval date. The version is cited in ETSI TS 103 765-2 V1.1.1.

3GPP TS 23.503 — Policy and Charging Control Framework for the 5G System — Stage 2

v18.9.0 · Release 18Issue referenced in the FRMCS Service Stratum

Defines the policy and charging framework of the 5G system. Basis for policy-based control and Quality of Service handling.

Version from the normative references of ETSI TS 103 765-2 V1.1.1. The month is the ETSI publication month of the exact issue, not the original 3GPP approval date.

Original retrievedOriginal ETSI exact-version PDF cover retrieved; it identifies publication month Apr 2025. This is the ETSI publication month, not the original 3GPP approval date. The version is cited in ETSI TS 103 765-2 V1.1.1.

3GPP TS 38.101-1 — NR User Equipment Radio Transmission and Reception — Part 1: Range 1 Standalone

v18.9.0 · Release 18Issue referenced in the FRMCS Radio Requirements

Defines transmission and reception requirements for 5G-NR user equipment in Frequency Range 1. Technical basis for the complementary FRMCS radio requirements.

Version from the normative references of ETSI TS 103 793 V1.1.1. The month is the ETSI publication month of the exact issue, not the original 3GPP approval date.

Original retrievedOriginal ETSI exact-version PDF cover retrieved; it identifies publication month Apr 2025. This is the ETSI publication month, not the original 3GPP approval date. The version is cited in ETSI TS 103 793 V1.1.1.

3GPP TS 38.104 — NR Base Station Radio Transmission and Reception

v18.9.0 · Release 18Issue referenced in the FRMCS Radio Requirements

Defines the transmission and reception characteristics of 5G-NR base stations. Reference for the FRMCS-specific radio parameters.

Version from the normative references of ETSI TS 103 793 V1.1.1. The month is the ETSI publication month of the exact issue, not the original 3GPP approval date.

Original retrievedOriginal ETSI exact-version PDF cover retrieved; it identifies publication month Apr 2025. This is the ETSI publication month, not the original 3GPP approval date. The version is cited in ETSI TS 103 793 V1.1.1.

3GPP TS 38.141-1 — NR Base Station Conformance Testing — Part 1: Conducted Conformance Testing

v18.9.0 · Release 18Issue referenced in the FRMCS Radio Requirements

Specifies conducted conformance tests for 5G-NR base stations. Provides the test basis for corresponding FRMCS radio tests.

Version from the normative references of ETSI TS 103 793 V1.1.1. The month is the ETSI publication month of the exact issue, not the original 3GPP approval date.

Original retrievedOriginal ETSI exact-version PDF cover retrieved; it identifies publication month Apr 2025. This is the ETSI publication month, not the original 3GPP approval date. The version is cited in ETSI TS 103 793 V1.1.1.

3GPP TS 38.508-1 — 5GS User Equipment Conformance Specification — Part 1: Common Test Environment

v18.6.0 · Release 18Issue referenced in the FRMCS Radio Requirements

Defines the common test environment for 5G user equipment conformance tests. Supports reproducible measurement and test conditions.

Version from the normative references of ETSI TS 103 793 V1.1.1. The month is the ETSI publication month of the exact issue, not the original 3GPP approval date.

Original retrievedETSI's official publication register was retrieved and identifies this exact version and publication month (Apr 2025); the linked exact-version PDF was inaccessible or too large. The month is not the original 3GPP approval date. The version is cited in ETSI TS 103 793 V1.1.1. · ETSI publication register

3GPP TS 38.521-1 — NR User Equipment Conformance Specification: Radio Transmission and Reception — Part 1: Range 1 Standalone

v18.6.0 · Release 18Issue referenced in the FRMCS Radio Requirements

Specifies radio conformance tests for 5G-NR user equipment in Frequency Range 1. Complements the requirements for their transmission and reception behaviour.

Version from the normative references of ETSI TS 103 793 V1.1.1. The month is the ETSI publication month of the exact issue, not the original 3GPP approval date.

Original retrievedETSI's official publication register was retrieved and identifies this exact version and publication month (May 2025); the linked exact-version PDF was inaccessible or too large. The month is not the original 3GPP approval date. The version is cited in ETSI TS 103 793 V1.1.1. · ETSI publication register

Durchführungsverordnung (EU) 2023/1695 — TSI CCS

v–No separate issue specified

Stipulates the European interoperability framework for train control, protection and signalling. The associated specification references place FRMCS within the RMR context.

The card identifies the basic legal act. It does not confirm the complete amendment status or the applicability of individual regulations.

Original retrievedEUR-Lex returned an automated-access check; the act (Commission Implementing Regulation (EU) 2023/1695 of 10 August 2023, CCS TSI) was confirmed via the EU Publications Office record https://publications.europa.eu/resource/celex/32023R1695.

CCS TSI Appendix A — FRMCS Baseline 0

vBaseline 0Evidenced Issue

Lists the referenced FRMCS documents and their versions. Lists FRS, SRS, TOBA FRS, FIS and FFFIS, each in version 1.0.0, with their associated notes.

The individual notes must be observed. The entry does not imply a general binding nature of all requirements or more recent issues.

Original retrievedERA Appendix A folder retrieved; it lists FRMCS FRS (FU-7120) and FFFIS (FFFIS-7950) v1.0.0 as the FRMCS B0 mandatory specifications. This is a live reference register, so a single publication date is not applicable.

ERA/OPI/2024-10 — Opinion on FRMCS Version 2, einschliesslich Addendum

v–No separate issue specified

Documents the ERA assessment of the FRMCS Version 2 specifications. The official page provides the opinion, an addendum and associated technical documents.

The opinion and addendum form a joint register entry here. Both documents are non-binding opinions, not standalone implementation specifications.

Original retrievedOriginal ERA opinion PDF retrieved; signature on printed page 23 is dated 19 December 2024. Original Addendum V1.0 retrieved; signature on printed page 3 is dated 12 May 2025. Both are non-binding opinions. · Addendum V1.0 — signed 12 May 2025

ECC Decision (20)02 — Harmonised Use of Spectrum for Railway Mobile Radio

vÄnderungsstand 28.06.2024Evidenced Issue

Harmonises the RMR frequency bands 874.4–880 MHz, 919.4–925 MHz and 1900–1910 MHz. Central frequency reference for GSM-R and FRMCS in Europe.

Original decision of 20 Nov 2020; the official CEPT metadata record identifies it as amended on 28 June 2024 and active. CEPT Report 90 describes the June 2024 amendment; its original PDF was not accessible when checked. National implementation and specific rights of use must be checked separately.

Link not re-checkedMetadata-only verification: the authoritative CEPT document index identifies ECC/DEC/(20)02 as amended on 28 June 2024 and active. CEPT Report 90 independently describes the June 2024 amendment, but direct access to its original PDF returned 403; neither item is represented as a retrieved full text. · CEPT Report 90 — original PDF (access returned 403)

Durchführungsbeschluss (EU) 2021/1730 — Harmonised Use of RMR Spectrum

v–No separate issue specified

Regulates the harmonised use of the RMR frequency bands in the European Union. The base act was amended by Commission Implementing Decision (EU) 2026/291 for additional use cases in the paired 874.4–880 / 919.4–925 MHz bands.

Base act of 28 September 2021. Official EUR-Lex metadata identifies amending Decision (EU) 2026/291 as adopted on 9 February 2026 and published on 11 February 2026. The full text was not directly retrievable because of the bot check; this is not a complete legal opinion or validity check.

Original retrievedThe 2021 base act was confirmed via the EU Publications Office record and the text copy at https://docdb.cept.org/download/3474. Official indexed EUR-Lex metadata identifies amending Decision (EU) 2026/291 as adopted on 9 February 2026 and published in the Official Journal on 11 February 2026, covering additional use cases in the paired 874.4–880 / 919.4–925 MHz bands. Direct access to the amendment and PDF reached a bot check, so its full text is not represented as retrieved. · Amending Decision (EU) 2026/291 — official indexed record · Decision (EU) 2026/291 — official PDF (bot check)

SUBSET-037-3 — EuroRadio FIS: FRMCS Communication Functional Module

v4.1.4Evidenced Issue

Specifies the FRMCS communication module in the EuroRadio context. Describes the technical connection for ETCS communication via FRMCS.

Published by ERA in the context of the opinion on FRMCS Version 2. Publication alone does not confirm the inclusion of this version in a mandatory baseline.

Original retrievedERA PDF retrieved: cover identifies SUBSET-037-3 issue 4.1.4, dated 11 April 2025. Publication does not by itself establish inclusion in a mandatory baseline.

ETSI TS 103 765-6 — Building Blocks and Functions: FRMCS Multipath Function

v0.0.4 draftEvidenced draft issue

Intended to describe the FRMCS multipath function in a separate part of the specification series. Addresses the use of multiple transport paths as a distinct standardisation topic.

Listed as a draft in the reviewed work programme. No completed publication confirmed.

Original retrievedExact ETSI work-item record retrieved: early draft V0.0.4 dated 9 July 2026; no final publication.

ETSI TS 104 127 — FRMCS Onboard Radio Interface

v0.0.8 draftEvidenced draft issue

Intended to technically specify the on-board radio interface OBRAD. Complements the already published OBRAD study TR 104 006 with the planned interface specification.

In progress in the reviewed work programme. No binding publication date can be derived from the review.

Original retrievedExact ETSI work-item record retrieved: early draft V0.0.8 dated 16 September 2026; no final publication.

ETSI TR 104 318 — FRMCS n101 Reference TDD Frame Applicability

v–No separate issue specified

Planned study on the applicability of a reference TDD frame in the FRMCS band n101. Intended to provide a technical basis for the temporal organisation of radio operation.

Work item evidenced; completed publication not confirmed.

Original retrievedExact ETSI work-item record retrieved: work item adopted on 15 July 2026; no published report version is recorded.

FRMCS V3 — First Edition Specification Set

v–No separate issue specified

Planned advanced FRMCS specification set. Intended to consolidate findings from development and trials into an implementable first system edition.

A document package, not a single standard. Complete public final issue and reliable publication date not confirmed in this review.

Original retrievedOfficial UIC article mirror retrieved: published 12 June 2026; the next V3 specification version was planned for November 2026 and TSI incorporation for 2028. These are plans, not publications. The article also describes ERIG, the Steering Group and six working groups.