ETSI TR 103 580 V1.2.1 (2024-07)

Urban Rail ITS and Road ITS applications in the 5,9 GHz band; Investigations for the shared use of spectrum

RTR/RT-JTFIR-3

General Information

• Status: Not Published
• Technical Committee: RT JTFIR - Joint Task Force ITS RT
• Current Stage: 12 - Completion
• Due Date: 09-Jul-2024
• Completion Date: 04-Jul-2024

Standards Content (Sample)

TECHNICAL REPORT
Urban Rail ITS and Road ITS applications
in the 5,9 GHz band;
Investigations for the shared use of spectrum

2 ETSI TR 103 580 V1.2.1 (2024-07)

Reference
RTR/RT-JTFIR-3
Keywords
ITS, railways
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - APE 7112B
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° w061004871

Important notice
The present document can be downloaded from:
https://www.etsi.org/standards-search
The present document may be made available in electronic versions and/or in print. The content of any electronic and/or
print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any
existing or perceived difference in contents between such versions and/or in print, the prevailing version of an ETSI
deliverable is the one made publicly available in PDF format at www.etsi.org/deliver.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
https://portal.etsi.org/TB/ETSIDeliverableStatus.aspx
If you find errors in the present document, please send your comment to one of the following services:
https://portal.etsi.org/People/CommiteeSupportStaff.aspx
If you find a security vulnerability in the present document, please report it through our
Coordinated Vulnerability Disclosure Program:
https://www.etsi.org/standards/coordinated-vulnerability-disclosure
Notice of disclaimer & limitation of liability
The information provided in the present deliverable is directed solely to professionals who have the appropriate degree of
experience to understand and interpret its content in accordance with generally accepted engineering or
other professional standard and applicable regulations.
No recommendation as to products and services or vendors is made or should be implied.
No representation or warranty is made that this deliverable is technically accurate or sufficient or conforms to any law
and/or governmental rule and/or regulation and further, no representation or warranty is made of merchantability or fitness
for any particular purpose or against infringement of intellectual property rights.
In no event shall ETSI be held liable for loss of profits or any other incidental or consequential damages.

Any software contained in this deliverable is provided "AS IS" with no warranties, express or implied, including but not
limited to, the warranties of merchantability, fitness for a particular purpose and non-infringement of intellectual property
rights and ETSI shall not be held liable in any event for any damages whatsoever (including, without limitation, damages
for loss of profits, business interruption, loss of information, or any other pecuniary loss) arising out of or related to the use
of or inability to use the software.
Copyright Notification
No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm except as authorized by written permission of ETSI.
The content of the PDF version shall not be modified without the written authorization of ETSI.
The copyright and the foregoing restriction extend to reproduction in all media.

© ETSI 2024.
All rights reserved.
ETSI
3 ETSI TR 103 580 V1.2.1 (2024-07)
Contents
Intellectual Property Rights . 6
Foreword . 6
Modal verbs terminology . 6
Executive summary . 6
Introduction . 7
1 Scope . 9
2 References . 9
2.1 Normative references . 9
2.2 Informative references . 9
3 Definitions of terms, symbols and abbreviations . 11
3.1 Terms . 11
3.2 Symbols . 12
3.3 Abbreviations . 12
4 Spectrum framework and technical descriptions of Urban Rail and Road ITS technologies . 14
4.1 Current spectrum regulatory framework . 14
4.2 Technical description of CBTC system communications. 16
4.2.1 Overview . 16
4.2.2 Detailed technical characteristics of CBTC using DSSS/TDMA communication system. . 17
4.2.3 Detailed technical characteristics of CBTC using IEEE 802.11 based communications . 19
4.3 Technical characteristics of Road ITS . 22
5 Evaluation of the areas of mutual impact . 22
5.1 Introduction . 22
5.2 Case studies . 22
5.2.1 Methodology . 22
5.2.2 Results . 24
5.2.2.1 Urban area: RATP Line 6 case . 24
5.2.2.2 Sub-Urban area: RATP Line 8 case . 27
5.3 RF propagation simulations for real situations . 29
5.4 Hidden nodes, exposed nodes and detection . 30
5.5 Channel occupancy and aggregated effect . 33
5.6 Suggested methodologies for the definition of restricted zones . 34
5.6.1 Purpose of the R-RMO . 34
5.6.2 Computation of R-RMOs . 34
5.6.3 Improvements of R-RMOs . 36
5.6.4 Examples of application of the process for a CBTC radio system based on IEEE 802.11 technology. 36
5.6.4.1 EIRP of the vehicles to be considered . 36
5.6.4.2 Methodology applied on line 6, with R-RMOs defined with distances derived from existing
measurements. . 36
5.6.4.3 Methodology applied on line 8, with R-RMOs defined from radio simulations. . 40
6 Restricted Modes of Operations (RMOs) . 44
6.1 Generalities on RMOs . 44
6.2 Progressive power restriction . 44
7 Sharing solution . 45
7.1 Introduction and general considerations . 45
7.2 Map server sub-system . 45
7.3 Hosting and uploading data . 46
7.4 On the implementation of maps . 47
7.5 On the implementation of distribution networks. . 50
8 General conclusions and summary . 50
Annex A: Simulations of various scenarios performed prior to measurements campaign. . 52
ETSI
4 ETSI TR 103 580 V1.2.1 (2024-07)
A.1 Scenario 2. Parallel road "Avenida Marcelino Camacho" between Andalucia Tech metro station
and depot facilities in Màlaga (Spain), metro line 1. Scenario CBTC depot . 52
A.2 Scenario 3. Parallel road "Boulevard Auguste Blanqui" between Saint-Jacques and Corvisart
metro station in Paris (France), metro line 6. Urban Rail tracks and road at same level with
buildings (NLOS) . 55
A.3 Scenario 4. Parallel highway and bridge in "N13" between La Defense and Les Sablons metro
station in Paris (France), metro line 1. Road on a bridge crossing the track . 58
A.4 Scenario 5. A86 Highway is intersecting the railroad between Houilles Carrieres-Sur-Seine and
La Garenne-Colombes RER train system. Urban Rail on a viaduct, above the road level . 61
Annex B: CBTC communication needs when using IEEE 802.11 based communication
system. . 65
B.1 Introduction . 65
B.2 Throughput needs for communication of a train with one ZC . 65
B.3 Throughput needs for communication for a train with three ZC . 66
B.4 Throughput needs for communication with for a train three ZC and PSD . 67
Annex C: CBTC communication needs when using IEEE 802.11 based communication
system with a 5 MHz-channel occupancy . 68
C.1 Protocol key parameters . 68
C.2 Results of analysis . 68
Annex D: Channel load as seen by a CBTC receiver . 70
Annex E: Summary of the Beaconing for the protection of CEN DSRC . 78
Annex F: Database for the protection of CEN DSRC . 80
Annex G: Methods of identification studied . 82
G.1 Facility Layer sharing zone identification techniques . 82
G.1.1 Overview . 82
G.1.2 ITS beaconing for the protection of Urban Rail . 82
G.1.2.1 General consideration . 82
G.1.2.2 Introduction. 82
G.1.2.3 Urban Rail ITS beacon transmission . 83
G.1.2.4 Urban Rail ITS beacon message format . 84
G.2 ITS Database for the protection of Urban Rail systems . . 88
G.2.1 General consideration . 88
G.2.2 Read-only database proposal for the protection of Urban Rail ITS . 88
G.2.3 Updatable database . 88
G.3 Combined beacon and database solution . 90
G.3.1 Database combined with Urban Rail PZ beaconing . 90
G.3.2 Updatable database combined with permissive beaconing . 90
G.4 Comparisons of different identification methods . 90
Annex H: Integration of Urban Rail systems in C-ITS . 94
H.1 Introduction . 94
H.2 Description of Option 1: Connection-based solution . 95
H.3 Description of Option 2: Broadcast-based solution . 95
H.3.1 Overview . 95
H.3.2 ITS protocols: nomenclature and main properties . 95
H.3.3 Road ITS communications architecture and protocol stack . 96
ETSI
5 ETSI TR 103 580 V1.2.1 (2024-07)
H.3.4 Requirements and solutions for safety and security . 97
H.3.5 Preliminary considerations to the use of broadcast mode . 98
H.3.6 Security and availability of CBTC communications . 99
H.3.7 Message set proposal . 99
H.4 Summary . 102
Annex I: Alternative RMOs. . 105
I.1 Stop transmission for all the vehicles in a R-RMO . 105
I.2 Duty cycle control . 105
I.3 Combined methods . 106
I.4 Comparison of solutions for sharing and mitigation . 106
Annex J: Plaint text GeoJSON . 108
Annex K: Change History . 109
History . 110

ETSI
6 ETSI TR 103 580 V1.2.1 (2024-07)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are publicly available for ETSI members and non-members, and can be
found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to
ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the
ETSI Web server (https://ipr.etsi.org/).
Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not
referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become,
essential to the present document.
Trademarks
The present document may include trademarks and/or tradenames which are asserted and/or registered by their owners.
ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its

Members. 3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and of the 3GPP
Organizational Partners. oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and of the ®
oneM2M Partners. GSM and the GSM logo are trademarks registered and owned by the GSM Association. ®
BLUETOOTH is a trademark registered and owned by Bluetooth SIG, Inc.
Foreword
This Technical Report (TR) has been produced by ETSI Technical Committee Railway Telecommunications (RT).
Modal verbs terminology
In the present document "should", "should not", "may", "need not", "will", "will not", "can" and "cannot" are to be
interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
Executive summary
The present document is in response to CEPT's invitation to ETSI to develop sharing and interference mitigation
techniques within three years, to ensure co-channel coexistence in the frequency range 5875 MHz to 5925 MHz
between Road ITS and Urban Rail radio technologies. It was initiated through the RSC (RSCOM17-26 rev.3 (Final)
[i.41]) with the wherein the following recommendation was made:
• "Mitigation techniques developed through ETSI standardization should be accompanied by technical
conditions for spectrum access and relevant harmonised standards, in a technology neutral approach."
CEPT Report 71 [i.12] proposed that technical solutions already deployed should remain available for maintenance and
evolution and the continued rollout of these systems should not be unduly hindered by a change of the spectrum
regulatory environment.
ETSI
7 ETSI TR 103 580 V1.2.1 (2024-07)
The present document proposes methods to allow sharing of Road ITS and Urban Rail in the frequency range
5 915 MHz to 5925 MHz where Urban Rail's priority is respected. Urban Rail intents to use the spectrum from
5875 MHz to 5 915 MHz within closed tunnels where interference with Road ITS services is not expected to be an
issue. The regulatory basis for this usage needs to be defined but is outside the scope of the present document. Usage of
this spectrum outside of tunnels is not considered in the present document. However, it may be addressed in the future.
The sharing techniques described in the present document should be extendable to other "aggressor" or "victim"
channels and bandwidths, if needed, to protect CBTC systems.
The present document proposes:
• Methods to compute the zones where Urban Rail and Road Intelligent Transportation Systems are likely to
interfere, based on the outcome of the measurement campaign.
• Principles governing the sharing solution and outline the design of the technical infrastructure allowing Road
ITS equipped vehicles to have access to up to date sharing information.
• Appropriate mitigation features to be implemented. These are Restricted Modes of Operations (RMOs) that
Road ITS equipped vehicles would activate to avoid interfering with Urban Rail ITS.
It is recommended that:
• a new Technical Specification (ETSI TS 103 745 [i.47]) be developed to address detection and mitigation
techniques outlined in the present document; and
• the regulatory and normative frameworks be subsequently updated to enable the use of the 5 915 MHz to
5 925 MHz by Road ITS subject to the implementation of the selected sharing solution.
Introduction
Modern mass-transit Urban Rail systems run trains at short intervals - often 90 seconds apart, sometimes even less. To
enable this in complete safety, automatic train control systems are employed, which drive the train, continuously
supervise train speed and enforce safe separation between trains.
These systems require continuous, bidirectional data transmission from track to trains, for which radio has been
increasingly used over the past fifteen years. Frequencies above 5 905 MHz are used based on national authorizations in
several countries (see Annex 1, Table 2b in CEPT Report 71 [i.12]) with proprietary radio technologies and protocols.
These radio-based systems are known as Communications Based Train Control (CBTC) systems.
In the context of extensive use of the spectrum, and to enable Public Transport Operators to modernize existing systems
and to plan new lines with CBTC, the need for a designated harmonised bandwidth for CBTC, with suitable quality of
service, has been expressed in the ETSI TR 103 111 [i.17].
Later, ETSI TR 103 442 [i.10] was developed to present to the ECC a common point of view between TC ITS and
TC RT, regarding sharing possibilities between CBTC and Road ITS applications in the 5 875 MHz to 5 925 MHz
frequency band. CEPT WGFM invited ETSI to provide a detailed and agreed technical standard allowing practical
implementation of both Urban Rail and Road ITS applications in the 5 875 MHz to 5 925 MHz band.
At EU level, the RSCOM mandated an ITS study [i.41] for the extension of the upper edge of the EC harmonised
safety-related ITS band (5 875 MHz to 5 905 MHz) by 20 MHz up to 5 925 MHz and allowing Urban Rail (using
Communication Based Train Control, (CBTC)) to use the EC harmonised safety-related ITS band. Its outcome is CEPT
Report 71 [i.12]. The RSCOM states, that it is important to note that the potential spectrum expansion is not intended to
support segmentation and segregation between technologies and applications within the same band and thus to
compensate for any cases of inefficient spectrum use.
CEPT Report 71 [i.12] also mentioned the fact that technical solutions already deployed should remain available for
maintenance and evolution and the continued rollout of these systems should not be unduly hindered by a change of the
spectrum regulatory environment.
CEPT Report 71 [i.12] responds to that mandate, inviting the European Commission to take into consideration the
following improvements in the regulatory framework for ITS: "The restriction to road transportation system should be
withdrawn and should encompass all ground-based land transportation systems including Urban Rail".
ETSI
8 ETSI TR 103 580 V1.2.1 (2024-07)
CEPT invited ETSI to develop sharing and interference mitigation techniques with a reasonable timeframe (no more
than 3 years), to ensure co-channel coexistence in the frequency range 5 875 MHz to 5 925 MHz between Road ITS and
Urban Rail applications, and between Road ITS radio technologies, considering the following from CEPT 71 report:
• "the frequency band 5875-5925 MHz is designated for all safety-related ITS applications (Road ITS and
Urban Rail ITS);
• the frequency band 5925-5935 MHz is designated for safety-related Urban Rail ITS applications.
• define priority to Road ITS applications below 5915 MHz and to Urban Rail ITS applications above
5915 MHz, so that protection is afforded to the application having priority;".
CEPT Report 71 [i.12] also mentioned the fact that technical solutions already deployed should stay available for
maintenance and evolution and the continued rollout of these systems should not be unduly hindered by a change of the
spectrum regulatory environment.
The current frequency allocation is summarized in Figure 1.

Figure 1: Road ITS and Urban Rail ITS bands
Sharing mechanisms will be specified in a subsequent technical specification which is anticipated to be referenced in a
harmonised standard. Indeed, equipment being made available on the market has to be in conformity with the RED,
especially article 3.2, and a harmonised standard will have to describe all conditions for the conformity especially with
article 3.2. If the manufacturer declares conformity using a notified body the same condition requirements would apply.
The essential requirement according to RED article 3.2. is that radio equipment is constructed so that it both effectively
uses and supports the efficient use of radio spectrum in order to avoid harmful interference.

ETSI
9 ETSI TR 103 580 V1.2.1 (2024-07)
1 Scope
The present document proposes methods to ensure co-channel coexistence in the frequency range 5 915 MHz to
5 925 MHz where Urban Rail is the priority application.
In the present document, tramways are considered to be Road ITS because they are not segregated from road or
pedestrian traffic.
NOTE: In the present document, no specific sharing methods for the operation of Urban Rail equipment in the
bands, where Road ITS has priority, are considered given that Urban Rail equipment is not operating in
these bands in areas where ITS equipment needs protection.
2 References
2.1 Normative references
Normative references are not applicable in the present document.
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee
their long-term validity.
The following referenced documents are not necessary for the application of the present document, but they assist the
user regarding a particular subject area.
[i.1] ETSI TS 102 792: "Intelligent Transport Systems (ITS); Mitigation techniques to avoid
interference between European CEN Dedicated Short Range Communication (CEN DSRC)
equipment and Intelligent Transport Systems (ITS) operating in the 5 GHz frequency range".
[i.2] ETSI EN 302 637-2 (V1.4.1): "Intelligent Transport Systems (ITS); Vehicular Communications;
Basic Set of Applications; Part 2: Specification of Cooperative Awareness Basic Service".
[i.3] ETSI TS 102 894-2 (V1.3.1): "Intelligent Transport Systems (ITS); Users and applications
requirements; Part 2: Applications and facilities layer common data dictionary".
[i.4] Void.
[i.5] ETSI EN 302 637-3 (V1.2.2): "Intelligent Transport Systems (ITS); Vehicular Communications;
Basic Set of Applications; Part 3: Specifications of Decentralized Environmental Notification
Basic Service".
[i.6] ETSI EN 302 663 (V1.2.1): "Intelligent Transport Systems (ITS); Access layer specification for
Intelligent Transport Systems operating in the 5 GHz frequency band".
[i.7] Void.
[i.8] Void.
[i.9] ETSI EN 302 665 (V1.1.1): "Intelligent Transport Systems (ITS); Communications Architecture".
[i.10] ETSI TR 103 442 (V1.1.1): "Railways Telecommunications (RT); Shared use of spectrum
between Communication Based Train Control (CBTC) and ITS applications".
[i.11] Void.
ETSI
10 ETSI TR 103 580 V1.2.1 (2024-07)
[i.12] CEPT Report 71: "Report from CEPT to the European Commission in response to the Mandate to
study the extension of the Intelligent Transport Systems (ITS) safety-related band at 5.9 GHz".
[i.13] IEEE 1474.1™-2004: "Communications-Based Train Control (CBTC) Performance and
Functional Requirements".
[i.14] IEC 62290.1 (2014): "Railway applications - Urban guided transport management and
command/control systems - Part 1: System principles and fundamental concepts".
[i.15] IEEE 802.11™-2016: "IEEE Standard for Information technology -- Telecommunications and
information exchange between systems Local and metropolitan area networks -- Specific
requirements -- Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY)
Specifications".
[i.16] ETSI EN 301 893 (V2.1.1): "5 GHz RLAN Harmonised Standard covering the essential
requirements of article 3.2 of Directive 2014/53/EU".
[i.17] ETSI TR 103 111 (V1.1.1): "Electromagnetic compatibility and Radio spectrum Matters (ERM);
System Reference document (SRdoc); Spectrum requirements for Urban Rail Systems in the
5,9 GHz range".
[i.18] Void.
[i.19] Void.
[i.20] Void.
[i.21] Void.
[i.22] ETSI EN 302 931 (V1.1.1): "Intelligent Transport Systems (ITS); Vehicular Communications;
Geographical Area Definition".
[i.23] Void.
[i.24] Void.
[i.25] EN 50128: "Railway applications - Communications, signalling and processing systems - Software
for railway control and protection systems" (produced by CENELEC).
[i.26] EN 50129: "Railway applications - Communication, signalling and processing systems - Safety
related electronic systems for signalling" (produced by CENELEC).
[i.27] Void.
[i.28] Void.
[i.29] ISO 3166-1: "Codes for the representation of names of countries and their subdivisions -- Part 1:
Country codes".
[i.30] ISO 26262 (all parts): "Road vehicles -- Functional safety".
[i.31] IEC 62132-1:2015: "Integrated circuits - Measurement of electromagnetic immunity - Part 1:
General conditions and definitions".
[i.32] ETSI TS 103 097: "Intelligent Transport Systems (ITS); Security; Security header and certificate
formats".
[i.33] ETSI TS 103 301: "Intelligent Transport Systems (ITS); Vehicular Communications; Basic Set of
Applications; Facilities layer protocols and communication requirements for infrastructure
services".
[i.34] Void.
[i.35] AEC - Q100: "Failure Mechanism Based Stress Test Qualification For Integrated Circuits".
[i.36] SAE J2735: "Dedicated Short Range Communications (DSRC) Message Set Dictionary™".
ETSI
11 ETSI TR 103 580 V1.2.1 (2024-07)
[i.37] Void.
[i.38] Directive 2014/53/EU of the European Parliament and of the Council of 16 April 2014 on the
harmonisation of the laws of the Member States relating to the making available on the market of
radio equipment and repealing Directive 1999/5/EC Text with EEA relevance.
[i.39] Brussels, 13.3.2019 C (2019) 1789 final ANNEX 3 to the Commission Delegated Regulation
supplementing Directive 2010/40/EU of the European Parliament and of the Council with regard
to the deployment and operational use of cooperative intelligent transport systems.
[i.40] ETSI TR 103 704 (V1.1.1): "Urban Rail ITS and Road ITS applications in the 5,9 GHz band;
Measurement campaign to confirm simulation parameters to define Urban Rail ITS protected
zones in 5 915 MHz to 5 925 MHz".
[i.41] RSCOM17-26 rev.3 (Final) Brussels, 18 October 2017 DG CONNECT/B4: "Opinion of the RSC
pursuant to Advisory Procedure under Article 4 of Regulation 182/2011/EU and Article 4.2 of
Radio Spectrum Decision 676/2002/EC - Subject: Mandate to CEPT to study the extension of the
Intelligent Transport Systems (ITS) safety-related band at 5.9 GHz".
[i.42] Car 2 Car consortium report: "Survey on ITS-G5 CAM statistics", December 2018.
[i.43] Commission Implementing Decision (EU) 2020/1426 of 7 October 2020 on the harmonised use of
radio spectrum in the 5 875-5 935 MHz frequency band for safety-related applications of
intelligent transport systems (ITS) and repealing Decision 2008/671/EC.
[i.44] Commission Implementing Decision (EU) 2019/1345 of 2 August 2019 amending Decision
2006/771/EC updating harmonized technical conditions in the area of radio spectrum use for short-
range devices.
[i.45] ETSI EN 303 867: "Rail telecommunications (RT); Urban rail radiocommunications equipment
operating in the 5 875 MHz to 5 935 MHz frequency band; Harmonised Standard for access to
radio spectrum".
[i.46] ETSI TR 103 853: "System Reference document (SRdoc); Road ITS equipment operating in the
5,9 GHz band with channel bandwidths larger than 10 MHz".
[i.47] ETSI TS 103 745: "Urban Rail ITS and Road ITS applications in the 5855-5925 MHz frequency
band; Requirements for the shared use of spectrum".
[i.48] Next Generation V2X - IEEE 8 02.11bd™ as fully backward compatible evolution of
IEEE 802.11p - CAR 2 CAR Communication Consortium - 2023-02-02.
[i.49] C-ITS Point of Contact (CPOC) Protocol in the EU C-ITS Security Credential Management
System (EU CCMS) - Release 3.0 January 2024.
[i.50] ECC/DEC/(08)01 of 14 March 2008 on the harmonised use of Safety-Related Intelligent Transport
Systems (ITS) in the 5875-5935 MHz frequency band, latest updated on 18 November 2022.
[i.51] ETSI EN 302 571 (V2.1.1): "Intelligent Transport Systems (ITS); Radiocommunications
equipment operating in the 5 855 MHz to 5 925 MHz frequency band; Harmonised Standard
covering the essential requirements of article 3.2 of Directive 2014/53/EU".
3 Definitions of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the following terms apply:
5 GHz ITS frequency band: band from 5 875 MHz to 5 935 MHz
ETSI
12 ETSI TR 103 580 V1.2.1 (2024-07)
Communications-Based Train Control (CBTC): Automatic Train Control (ATC) system using radio for train to
wayside data communications
NOTE: The general functional requirements of CBTC systems have been standardized by the IEEE in
IEEE 1474.1 [i.13], and by the IEC standard 62290.1 [i.14], which give the following definition:
 A CBTC system is a continuous, automatic Communication-Based Train Control system utilizing:
- high-resolution train location determination, independent of track circuits;
- continuous, high-capacity, bidirectional train-to-wayside data communications; and
- train borne and wayside processors capable of implementing Automatic Train Protection
(ATP) functions, as well as optional Automatic Train Operation (ATO) and Automatic Train
Supervision (ATS) functions.
road ITS: ITS systems based on vehicle-to-vehicle, vehicle-to-infrastructure and infrastructure-to-infrastructure
communications for the exchange of information between road vehicles and their environment
NOTE: In the present document Road ITS includes all kinds of ground based ITS except Urban Rail ITS systems.
road ITS station: station transmitting in the 5 GHz ITS frequency band, as defined in ETSI EN 302 665 [i.9]
static detection method: method used by a Road ITS station to detect that it is in a geographical area where Urban Rail
protection is requested, even if there is no train in the area and therefore no actual need to mitigate
Urban Rail: public transport system permanently guided at least by one rail, intended for the operation of local, urban
and suburban passenger services with self-propelled vehicles and segregated from general road and pedestrian traffic
Urban Rail ITS: Urban Rail system controlled by a CBTC application with communications operating in the 5 GHz
ITS frequency band
NOTE: Trams are not included in this definition.
Urban Rail station: Urban Rail device transmitting CBTC messages in the 5 GHz ITS frequency band
vehicle: all types of land mobile device
3.2 Symbols
Void.
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
ACK ACKnowledgment
AP Access Point
API Application Programming Interface
ASECAP Association Européenne des Concessionnaires d'Autoroutes et d'Ouvrages à Péage (European
Association of Operators of Road Tolling Infrastructure)
ASIL Automotive Safety Integrity Level
ASN Abstract Syntax Notation
ATC Automatic Train Control
ATO Automatic Train Operation
ATP Automatic Train Protection
ATS Automatic Train Supervision
BS Base Station
BSS Basic Service Set
CABS Cooperative Awareness Basic Service
CAM Cooperative Awareness Message
CAS Cooperative Awareness basic Service
CBTC Communications-Based Train Control
ETSI
13 ETSI TR 103 580 V1.2.1 (2024-07)
CBTC BS Communications-Based Train Control Base Station
CCH Control Channel
CDD Common Data Dictionary
CEN Comité Européen de Normalisation (European Committee for Standardization)
C-ITS Cooperative Intelligent Transportation Systems
C-ITS-S Cooperative ITS Station
CMS Certificate Management System
C/N Carrier-to-Noise
CRA Communication Relevance Area
CSMA/CA Carrier Sense Multiple Access with Collision Avoidance
CTS Clear To Send
DCC Decentralized Congestion Control
DE Data Element
DEN Decentralized Environmental Notification
DENM Decentralized Environmental Notification Message
DF Data Frame
DIFS Distributed coordination function Interframe space
DSRC Dedicated Short-Range Communications
DSSS Direct Sequence Spread Spectrum
E2E End-to-End
EIRP Equivalent Isotropic Radiated Power
NOTE: Unless stated otherwise, EIRP denotes the maximum value over all directions.
EMC ElectroMagnetic Compatibility
FCS Frame Check Sequence
FWA Fixed Wireless Access
GN GeoNetworking
GPS Global Positioning System
HF High Frequency
IBSS Independent Basic Service Set
ID IDentity
IEC International Electrotechnical Commission
IEEE Institute of Electrical and Electronics Engineers
IP Internet Protocol
ISO International Standards Organization
ITS Intelligent Transport Systems
ITS-G5 IEEE 802.11 radio access technology in the 5,9 GHz band
ITS-S Intelligent Transport Systems Station
ITU-R International Telecommunication Union - Radio
I2V Infrastructure-to-Vehicle
LDM Local Dynamic Map
LF Low Frequency
LTE Long Term Evolution
MAC Medium Access Control
MAP Map data
MCO MultiChannel Operation
NLOS No Line Of Sight
OBU On Board Unit
OCB Outside the Context of a BSS
OEM Original Equipment Manufacturer
OFDM Orthogonal Frequency-Division Multiplexing
OJEU Official Journal of the European Union
PHY PHYsical layer
PKI Public Key Infrastructure
PR Protection Ratio
PSD Platform Screen Doors
PZ Protection Zone
PZM Protection Zone Message
RATP Régie Autonome des Transport Parisien
NOTE: Metro operator of Paris.
ETSI
14 ETSI TR 103 580 V1.2.1 (2024-07)
RED Radio Equipment Directive
RER Reseau Express Regional
NOTE: Suburban metro lines in Paris.
RF Radio Frequency
R-ITS Road Intelligent Transport Systems
RMO Restricted Mode of Operations
R-RMO Region of Restricted Mode of Operations
RSU Road Side Unit or Rail Side Unit
RSSI Received Signal Strength Indicator
RTS Request To Send
SAE Society of Automotive Engineers
SIFS Short InterFrame Space
SIL4 Safety Integrity Level 4
SINR Signal Interference + Noise Ratio
SPAT Signal Phase and Timing
SRD Short Term Devices
TDD Time Division Duplexing
TDMA Time Division Multiple Access
T-ITS-S Train ITS Station
TS Technical Specification
TS-ITS-S Track Side ITS Station
T-OBU Train OnBoard Unit
TX Transmitter
UDP User Datagram Protocol
UR Urban Rail
UR-CAM Urban Rail CAM
UR-DENM Urban Rail DENM-like message
UR-ITS-S Urban Rail ITS Station
NOTE: An UR-ITS-S is either a T-ITS-S or a TS-ITS-S.
UTC Coordinated Universal Time
V-ITS-S Vehicle ITS Station
V2I Vehicle-to-Infrastructure
V2V Vehicle-to-Vehicle
V2X Vehicle-to-Everything
WGFM Working Group Frequency Management
WGS World Geodetic System ®
MAC & PHY specified in IEEE 802.11 [i.15]
Wi-Fi
XML eXtensible Markup Language
ZC Zone Controller
4 Spectrum framework and technical descriptions of
Urban Rail and Road ITS technologies
4.1 Current spectrum regulatory framework
The present document is compiled on the Commission Implementing Decision (EU) 2020/1426 [i.43].
ETSI
15 ETSI TR 103 580 V1.2.1 (2024-07)
Urban Rail has priority /
Road ITS allowed
Figure 2: Spectrum status for Road ITS and Urban Rail ITS
Figure 2 depicts the spectrum situation for Road ITS and Urban Rail ITS. The SRD band from 5 855 MHz to 5 875
MHz has a designation for non-safety ITS services and the ITS band from 5 875 MHz to 5 935 MHz for safety related
services. Th
...