IEC 61375-2-3:2015

Electronic railway equipment - Train communication network (TCN) - Part 2-3: TCN communication profile

IEC 61375-2-3:2015 specifies rules for the data exchange between consists in trains. The aggregation of these rules defines the TCN communication profile. The objective of the communication profile is to ensure interoperability between consists of the said trains with respect to the exchange of information. For this purpose it defines all items which are necessary for communication interoperability:
- an architecture with defined train directions related to different train views;
- a common functional addressing concept;
- common communication protocol for data exchange between functions;
- a set of services for train communication control. The contents of the corrigendum of December 2015 and October 2016 have been included in this copy.

Matériel électronique ferroviaire - Réseau embarqué de train (TCN) - Partie 2-3: Profil de communication TCN

l'IEC 61375-2-3:2015 spécifie les règles relatives à l'échange de données entre les rames de trains. L'agrégation de ces règles définit le profil de communication TCN. L'objectif du profil de communication est d'assurer l'interopérabilité entre les rames desdits trains du point de vue de l'échange d'informations. Pour cela, il définit l'ensemble des éléments nécessaires à l'interopérabilité de communication:
- une architecture, avec des directions de train définies relatives à différentes vues du train;
- un concept d'adressage fonctionnel commun;
- un protocole de communication commun pour l'échange des données entre les fonctions;
- un ensemble de services pour le contrôle des communications de trains.
Le contenu des corrigenda de décembre 2015 et d'octobre 2016 a été inclus dans cette version.

General Information

• Status: Published
• Publication Date: 15-Jul-2015
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 45.060.01 - Railway rolling stock in general
• Technical Committee: TC 9 - Electrical equipment and systems for railways
• Drafting Committee: WG 43 - TC 9/WG 43
• Current Stage: PPUB - Publication issued
• Start Date: 31-Jul-2015
• Completion Date: 16-Jul-2015

Relations

• Corrected By: IEC 61375-2-3:2015/COR2:2016 - Corrigendum 2 - Electronic railway equipment - Train communication network (TCN) - Part 2-3: TCN communication profile
• Effective Date: 05-Sep-2023
• Corrected By: IEC 61375-2-3:2015/COR1:2015 - Corrigendum 1 - Electronic railway equipment - Train communication network (TCN) - Part 2-3: TCN communication profile
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61375-2-3 ®
Edition 1.0 2015-07
INTERNATIONAL
STANDARD
colour
inside
Electronic railway equipment – Train communication network (TCN) –
Part 2-3: TCN communication profile
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Central Office Tel.: [phone]
3, rue de Varembé Fax: [phone]
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Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

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IEC 61375-2-3 ®
Edition 1.0 2015-07
INTERNATIONAL
STANDARD
colour
inside
Electronic railway equipment – Train communication network (TCN) –

Part 2-3: TCN communication profile

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 45.060 ISBN 978-2-8322-2775-6

– 2 – IEC 61375-2-3:2015  IEC 2015
CONTENTS
FOREWORD . 13
INTRODUCTION . 15
1 Scope . 16
2 Normative references . 17
3 Terms, definitions, abbreviations, acronyms, and conventions . 18
3.1 Terms and definitions . 18
3.2 Abbreviations and acronyms . 26
3.3 Conventions . 28
3.3.1 Base of numeric values . 28
3.3.2 Character strings and citations . 28
3.3.3 Naming conventions . 29
3.3.4 Diagram conventions . 29
3.3.5 Annotation of data structures . 29
4 Architecture . 31
4.1 General . 31
4.2 Physical train architecture (system breakdown). 31
4.2.1 General . 31
4.2.2 Train network architectures . 31
4.2.3 Closed Trains . 35
4.2.4 Directions . 36
4.2.5 Consist and vehicle basic properties . 37
4.3 Logical Train Architecture (Functional Breakdown) . 38
4.3.1 General . 38
4.3.2 Service classification . 38
4.3.3 Operational Services Overview . 39
4.3.4 Service Provider . 40
5 Common ETB framework . 40
5.1 General . 40
5.1.1 Overview . 40
5.1.2 Interoperability . 40
5.2 CSTINFO telegram . 41
5.2.1 General . 41
5.2.2 Closed train support (Option) . 41
5.2.3 Protocol . 41
5.2.4 CSTINFO classes . 41
5.2.5 CSTINFO Notification Message . 42
5.2.6 CSTINFO Request . 43
5.3 Train topology database . 45
5.3.1 General . 45
5.3.2 Computation of the TTDB . 47
5.3.3 Data structure . 52
5.3.4 Train Topology Database for multiple ETBs (Option) . 60
5.4 Service Addressing . 62
5.4.1 General . 62
5.4.2 TCN Domain Name System (TCN-DNS) . 63
5.4.3 TCN Domain Names . 64

5.4.4 TCN-URI Scheme . 64
5.4.5 Mapping TCN-URI to IP address . 70
5.4.6 Support of other URI schemas . 74
5.5 TCN-DNS Server . 74
5.5.1 General . 74
5.5.2 Architecture . 74
5.5.3 Functional address resolution . 74
5.5.4 Protocol . 77
5.5.5 Multiple ETBs . 78
5.6 Data exchange . 78
5.6.1 General . 78
5.6.2 Operational network communication . 78
5.6.3 OMTS network communication . 79
5.6.4 Quality of Service (QoS) . 79
5.7 Service discovery . 80
5.8 Train Info Service . 80
6 Services of the communication profile – ETB Control Service . 80
6.1 General . 80
6.2 Communication model . 80
6.3 ECSP Supervision . 81
6.4 ECSP Interconnection . 81
6.4.1 General . 81
6.4.2 ETBCTRL telegram exchange selection . 81
6.4.3 ETBCTRL telegram transmission . 81
6.4.4 Structure of the ETBCTRL telegram . 82
6.4.5 Operational train directory computation process . 84
6.5 Function “Leading” . 87
6.5.1 General . 87
6.5.2 Function primitives . 88
6.5.3 ECSP to ECSP protocol . 89
6.6 Function Confirmation/Correction . 93
6.6.1 General . 93
6.6.2 Function primitives . 93
6.6.3 ECSP to ECSP protocol . 95
6.6.4 State diagram . 98
6.6.5 ECSC Failure . 100
6.7 Computation of the operational train directory . 100
6.7.1 General . 100
6.7.2 Action setCorrInfo . 101
6.7.3 Action computeOpTrnDir . 105
6.8 Function Sleep Mode (Option) . 107
6.8.1 General . 107
6.8.2 Sleep Mode Use Case (informal) . 107
6.8.3 Exclusivity . 109
6.8.4 Function primitives . 109
6.8.5 ECSP to ECSP protocol . 111
Annex A (normative) Train Real-Time Data Protocol (TRDP) . 115
A.1 General .
...

IEC 61375-2-3 ®
Edition 1.0 2015-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electronic railway equipment – Train communication network (TCN) –
Part 2-3: TCN communication profile

Matériel électronique ferroviaire – Réseau embarqué de train (TCN) –
Partie 2-3: Profil de communication TCN

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
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About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

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documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
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The advanced search enables to find IEC publications by a 67 000 electrotechnical terminology entries in English and
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IEC 61375-2-3 ®
Edition 1.0 2015-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electronic railway equipment – Train communication network (TCN) –

Part 2-3: TCN communication profile

Matériel électronique ferroviaire – Réseau embarqué de train (TCN) –

Partie 2-3: Profil de communication TCN

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 45.060.01 ISBN 978-2-8322-6098-2

– 2 – IEC 61375-2-3:2015  IEC 2015
CONTENTS
FOREWORD . 13
INTRODUCTION . 15
1 Scope . 16
2 Normative references . 17
3 Terms, definitions, abbreviations, acronyms, and conventions . 18
3.1 Terms and definitions . 18
3.2 Abbreviations and acronyms . 26
3.3 Conventions . 28
3.3.1 Base of numeric values . 28
3.3.2 Character strings and citations . 28
3.3.3 Naming conventions . 29
3.3.4 Diagram conventions . 29
3.3.5 Annotation of data structures . 29
4 Architecture . 31
4.1 General . 31
4.2 Physical train architecture (system breakdown). 31
4.2.1 General . 31
4.2.2 Train network architectures . 31
4.2.3 Closed Trains . 35
4.2.4 Directions . 36
4.2.5 Consist and vehicle basic properties . 37
4.3 Logical Train Architecture (Functional Breakdown) . 38
4.3.1 General . 38
4.3.2 Service classification . 38
4.3.3 Operational Services Overview . 39
4.3.4 Service Provider . 40
5 Common ETB framework . 40
5.1 General . 40
5.1.1 Overview . 40
5.1.2 Interoperability . 40
5.2 CSTINFO telegram . 41
5.2.1 General . 41
5.2.2 Closed train support (Option) . 41
5.2.3 Protocol . 41
5.2.4 CSTINFO classes . 41
5.2.5 CSTINFO Notification Message . 42
5.2.6 CSTINFO Request . 43
5.3 Train topology database . 45
5.3.1 General . 45
5.3.2 Computation of the TTDB . 47
5.3.3 Data structure . 52
5.3.4 Train Topology Database for multiple ETBs (Option) . 60
5.4 Service Addressing . 62
5.4.1 General . 62
5.4.2 TCN Domain Name System (TCN-DNS) . 63
5.4.3 TCN Domain Names . 64
5.4.4 TCN-URI Scheme . 64

5.4.5 Mapping TCN-URI to IP address . 71
5.4.6 Support of other URI schemas . 74
5.5 TCN-DNS Server . 74
5.5.1 General . 74
5.5.2 Architecture . 75
5.5.3 Functional address resolution . 75
5.5.4 Protocol . 77
5.5.5 Multiple ETBs . 78
5.6 Data exchange . 78
5.6.1 General . 78
5.6.2 Operational network communication . 78
5.6.3 OMTS network communication . 79
5.6.4 Quality of Service (QoS) . 79
5.7 Service discovery . 80
5.8 Train Info Service . 80
6 Services of the communication profile – ETB Control Service . 80
6.1 General . 80
6.2 Communication model . 80
6.3 ECSP Supervision . 81
6.4 ECSP Interconnection . 81
6.4.1 General .
...