SIST EN 61375-2-5:2015

SLOVENSKI STANDARD
SIST EN 61375-2-5:2015
01-maj-2015
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Electronic railway equipment - Train backbone - Part 2-5: Ethernet Train Backbone
Elektronische Betriebsmittel für Bahnen - Zug-Kommunikations-Netzwerk - Teil 2-5: ETB
- Ethernet Train Backbone
Matériel électronique ferroviaire - Réseau de train - Partie 2-5: Réseau de Train Ethernet
Ta slovenski standard je istoveten z: EN 61375-2-5:2015
ICS:
45.020 Železniška tehnika na Railway engineering in
splošno general
SIST EN 61375-2-5:2015 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 61375-2-5:2015

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SIST EN 61375-2-5:2015


EUROPEAN STANDARD EN 61375-2-5

NORME EUROPÉENNE

EUROPÄISCHE NORM
February 2015
ICS 45.060

English Version
Electronic railway equipment - Train communication network
(TCN) - Part 2-5: Ethernet train backbone
(IEC 61375-2-5:2014)
Matériel électronique ferroviaire - Réseau embarqué de Elektronische Betriebsmittel für Bahnen - Zug-
train (TCN) - Partie 2-5: Réseau central de train Ethernet Kommunikations-Netzwerk - Teil 2-5: ETB - Ethernet Train
(IEC 61375-2-5:2014) Backbone
(IEC 61375-2-5:2014)
This European Standard was approved by CENELEC on 2014-09-29. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.



European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN 61375-2-5:2015 E

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SIST EN 61375-2-5:2015
EN 61375-2-5:2015 - 2 -
Foreword
The text of document 9/1933/FDIS, future edition 1 of IEC 61375-2-5, prepared by IEC/TC 9 "Electrical
equipment and systems for railways" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN 61375-2-5:2015.
The following dates are fixed:
(dop) 2015-08-27
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2017-09-29
standards conflicting with the
document have to be withdrawn

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent
rights.
Endorsement notice
The text of the International Standard IEC 61375-2-5:2014 was approved by CENELEC as a European
Standard without any modification.
IEC 61375-2-1:2012 NOTE  Harmonized as EN 61375-2-1:2012.
IEC 61784-2 NOTE  Harmonized as EN 61784-2.
IEC 61918 NOTE  Harmonized as EN 61918.

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SIST EN 61375-2-5:2015
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Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD

applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 61076-2-101 2012 Connectors for electronic equipment - EN 61076-2-101 2012
Product requirements -- Part 2-101: Circular
connectors - Detail specification for M12
connectors with screw-locking
IEC 61156 series Multicore and symmetrical pair/quad cables - series
for digital communications
IEC 61156-1 2007 Multicore and symmetrical pair/quad cables - -
for digital communications - Part 1: Generic
specification
IEC 61156-5 -  Multicore and symmetrical pair/quad cables - -
for digital communications - Part 5:
Symmetrical pair/quad cables with
transmission characteristics up to 1 000
MHz - Horizontal floor wiring - Sectional
specification
IEC 61375-1 2012 Electronic railway equipment - Train EN 61375-1 2012
communication network (TCN) -- Part 1:
General architecture
IEC 61375-2-3 -  Electronic railway equipment - Train FprEN 61375-2-3 -
Communication Network (TCN) - Part 2-3:
TCN communication profile
IEC 61375-3-4 -  Electronic railway equipment - Train Bus - EN 61375-3-4 -
Part 3-4: ECN - Ethernet Consist Network
IEC 62236-3-2 -  Railway applications - Electromagnetic - -
compatibility -- Part 3-2: Rolling stock -
Apparatus
ISO/IEC 7498 series Information processing systems - Open - series
systems interconnection - Basic reference
model
ISO/IEC 8824 series Information technology - Abstract Syntax - series
Notation One (ASN.1)
ISO/IEC 9646 series Information technology - Open Systems EN ISO/IEC 9646 series
Interconnection
ISO/IEC 11801 2002 Information technology - Generic cabling for - -
customer premises
IEEE 802.1AB -  IEEE Standard for Local and Metropolitan - -
Area Networks - Station and Media Access
Control Connectivity Discovery
IEEE 802.1AX 2008 IEEE Standard for Local and metropolitan - -
area networks - Link Aggregation

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SIST EN 61375-2-5:2015
EN 61375-2-5:2015 - 4 -
IEEE 802.1D 2012 IEEE Standard for local and metropolitan - -
area networks - Media Access Control
(MAC) Bridges
IEEE 802.1Q -  IEEE Standard for Local and metropolitan - -
area networks - Media Access Control
(MAC) Bridges and Virtual Bridges
IEEE 802.2 -  IEEE Standard for Information technology - - -
Telecommunications and information
exchange between systems - Local and
metropolitan area networks - Specific
requirements - Part 2: Logical Link Control
IEEE 802.3 2012 IEEE Standard for Ethernet - -

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Annex ZZ
(informative)

Relationship between this European Standard and the Essential
Requirements of EU Directive 2008/57/EC

This European Standard has been prepared under a mandate given to CENELEC by the European
Commission and the European Free Trade Association and within its scope the standard covers all
relevant essential requirements as given in Annex lll of the EC Directive 2008/57/EC (also named as
New Approach Directive 2008/57/EC Rail Systems: Interoperability).

Once this standard is cited in the Official Journal of the European Union under that Directive and has
been implemented as a national standard in at least one Member State, compliance with the
clauses of this standard given in Table ZZ.1 relating to the ‘rolling stock - locomotives and
passenger rolling stock’ subsystem of the rail system in the European Union, confers, within the
limits of the scope of this standard, a presumption of conformity with the corresponding Essential
Requirements of that Directive and associated EFTA regulations.

Table ZZ.1 - Correspondence between this European Standard, the RST LOC&PAS TSI
(published in the Official Journal L 356 on 12 December 2014, p. 228) and Directive
2008/57/EC

Clauses of this Chapter / § / points / Essential Comments
European Standard of RST LOC&PAS TSI Requirements (ER) of
Directive 2008/57/EC

2. Requirements specific
4.2.4.9 Brake state and
to each sub-subsystem
fault indication
2.4. Rolling Stock

The TSI does not impose
4.2.5.2 Audible 2.4.1. Safety
any technical solution
communication system
regarding physical
2.4.2. Reliability

interfaces between units.
and availability
4.2.5.3 Passenger alarm

2.4.3. Technical
The whole standard is The standard offers a
4.2.5.4 Communication
compatibility
applicable
general multi-purpose
devices for passengers

solution for the inter-

4.2.5.5 Exterior doors
vehicle digital

communication network
4.2.12.2 General
and it is relevant to
documentation: -
vehicle interoperability.
description of
computerised onboard

systems





WARNING: Other requirements and other EU Directives may be applicable to the products

falling within the scope of this standard.

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SIST EN 61375-2-5:2015

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SIST EN 61375-2-5:2015




IEC 61375-2-5

®


Edition 1.0 2014-08




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE
colour

inside










Electronic railway equipment – Train communication network (TCN) –

Part 2-5: Ethernet train backbone




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

Partie 2-5: Réseau central de train Ethernet
















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE

PRICE CODE
INTERNATIONALE

XF
CODE PRIX


ICS 45.060 ISBN 978-2-8322-1772-6



Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN 61375-2-5:2015
– 2 – IEC 61375-2-5:2014 © IEC 2014
CONTENTS
FOREWORD . 7
INTRODUCTION . 9
1 Scope . 10
2 Normative references. 10
3 Terms, definitions, symbols, abbreviations and conventions . 11
3.1 Terms and definitions . 11
3.2 Symbols and abbreviations . 15
3.3 Conventions . 17
3.3.1 Base of numeric values . 17
3.3.2 Naming conventions . 17
3.3.3 State diagram conventions . 17
3.3.4 Annotation of data structures . 17
4 ETB physical layer . 17
4.1 Train regions . 17
4.2 Physical characteristics . 18
4.2.1 General . 18
4.2.2 Intra car physical layer . 18
4.2.3 Inter car physical layer . 20
4.2.4 Inter Consist physical layer . 24
4.3 Power over Ethernet (PoE) . 27
4.4 ETB physical architecture and redundancy. 29
4.4.1 General . 29
4.4.2 Link aggregation architecture . 29
4.4.3 Functions . 31
5 ETB data link layer . 32
6 ETB network layer: IPv4 subnets definition . 33
6.1 General . 33
6.2 IP mapping introduction . 34
6.3 Topology . 34
6.3.1 General . 34
6.3.2 Closed train . 35
6.4 Network IP address map . 36
6.4.1 Global IPv4 address space . 36
6.4.2 Train subnet definition . 36
6.4.3 Train IP address map summary . 40
6.4.4 Train IP group addresses (multicast) . 41
6.5 Particular hosts IP addresses . 41
6.5.1 ETBN (Ethernet Train Backbone Node) . 41
6.5.2 Hosts on train subnet . 42
6.5.3 Host inside a closed train . 43
6.6 Some use cases . 45
6.7 Dynamic IP routing management . 48
6.7.1 Unicast routes . 48
6.7.2 Multicast routes . 48
7 ETB Transport layer . 49
8 ETB Train Inauguration: TTDP . 50

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SIST EN 61375-2-5:2015
IEC 61375-2-5:2014 © IEC 2014 – 3 –
8.1 Contents of this clause . 50
8.2 Objectives and assumptions . 50
8.2.1 Goals . 50
8.2.2 Out of scope . 51
8.2.3 Assumptions . 51
8.3 ETBN settings . 52
8.3.1 ETB switch port states . 52
8.3.2 Node settings . 52
8.4 General behaviour . 54
8.5 ETBN Inauguration state diagram . 54
8.5.1 General . 54
8.5.2 Actions . 55
8.5.3 Transitions . 57
8.6 ETBN peers discovery . 58
8.6.1 Internal peers detection . 58
8.6.2 External peers detection . 58
8.6.3 Switch port states handling. 59
8.6.4 ETB lines statuses . 59
8.7 TTDP messages description . 61
8.7.1 General . 61
8.7.2 Convention . 61
8.7.3 TTDP frame tagging . 61
8.7.4 Transport and addressing . 61
8.7.5 TTDP HELLO frame . 62
8.7.6 TTDP TOPOLOGY frame . 66
8.8 TTDP data structures . 72
8.8.1 Connectivity Vector . 72
8.8.2 ETBN Vector . 73
8.8.3 Connectivity Table . 73
8.8.4 Connectivity Table CRC . 74
8.8.5 Train network directory . 76
8.8.6 Train network directory CRC (Topology Counter) . 78
8.8.7 Corrected topology . 78
8.9 TTDP frames timing . 79
8.9.1 TTDP HELLO . 79
8.9.2 TTDP TOPOLOGY . 81
8.10 Inauguration Train Application interface . 83
8.11 Degraded modes . 83
8.11.1 Late insertion ETBN . 83
8.11.2 Losing ETBN . 84
8.11.3 End ETBN failure and partial topology counter . 84
8.12 Some discovery timing . 85
8.12.1 ETBN wakeup . 85
8.12.2 ETBN failure . 86
8.12.3 Consist coupling . 87
9 ETB ETBN redundancy . 88
10 ETB physical train naming convention (optional) . 89
10.1 General . 89
10.2 ETB Train domain . 89

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SIST EN 61375-2-5:2015
– 4 – IEC 61375-2-5:2014 © IEC 2014
10.3 Hostname . 90
11 ETB Quality of Service . 91
11.1 Contents of this clause . 91
11.2 Frame forwarding . 91
11.2.1 ETBN switching rate . 91
11.2.2 No Head-of-Line blocking . 91
11.2.3 Switching priorities . 91
11.2.4 Switching queuing scheme . 92
11.3 Priority of Inauguration frames . 92
11.4 ETB ingress rate limiting . 92
11.5 ETB egress rate shaping . 92
11.6 ETB data classes . 92
12 ETB Management and monitoring . 93
13 ETB Application interface . 93
13.1 Contents of this clause . 93
13.2 Abstract communication model . 93
13.3 ETB Process Data and Message Data protocols . 94
13.4 ETB protocol transparency . 94
13.5 ETBN interfaces . 94
13.5.1 Application . 94
13.5.2 Maintenance and monitoring . 95
14 ETB conformity statement . 96
Annex A (normative) Summary of ETB sizing parameters. 97
Annex B (normative) Physical topology building algorithm . 98
Annex C (normative) TTDP MIB definition . 101
Bibliography . 121

Figure 1 – ETB train regions . 18
Figure 2 – ETB Inter car at same potential . 23
Figure 3 – ETB Inter car not at the same potential . 24
Figure 4 – ETB Consist reversing . 26
Figure 5 – ETB Inter Consist segment . 27
Figure 6 – ETBN PSE PoE use case . 27
Figure 7 – ETBN PD PoE use case . 28
Figure 8 – PoE in inter-Consist. 28
Figure 9 – PoE PSE alternative A . 29
Figure 10 – Redundant train backbone architecture . 29
Figure 11 – Link aggregation model . 30
Figure 12 – Link aggregation group . 31
Figure 13 – Conversations over LAG . 31
Figure 14 – Hierarchical Consist topology . 35
Figure 15 – Closed train . 36
Figure 16 – "Subnet Id" with single Consist Network . 38
Figure 17 – "Subnet Id" with two single Consist Networks . 38
Figure 18 – Multiple Consist Networks, without fault tolerance . 39

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SIST EN 61375-2-5:2015
IEC 61375-2-5:2014 © IEC 2014 – 5 –
Figure 19 – "Subnet Id" with ETBN redundancy . 39
Figure 20 – "Subnet Id" in multiple units with ETBN redundancy . 40
Figure 21 – IP train address space summary . 40
Figure 22 – Relative addressing example . 45
Figure 23 – Train composed of a single Consist Network . 46
Figure 24 – Train composed of two single Consist Networks . 46
Figure 25 – Train composed of single Consist Network with ETBN redundancy . 47
Figure 26 – Train composed of two Consist Networks with ETBN redundancy . 47
Figure 27 – Train with two Consist Networks in single Consist . 48
Figure 28 – ETBN top node reference . 51
Figure 29 – ETBN orientation capability . 52
Figure 30 – ETB switch in passive bypass setting . 53
Figure 31 – ETB switch in intermediate setting . 53
Figure 32 – ETB switch in End Node Setting . 54
Figure 33 – ETBN Inauguration state diagram . 55
Figure 34 – Switch port state diagram . 59
Figure 35 – ETBN physical line state machine . 60
Figure 36 – TTDP HELLO frame LLDPDU structure .
...