IEC TR 61375-2-7:2014

Electronic railway equipment - Train communication network (TCN) - Part 2-7: Wireless Train Backbone (WLTB)

IEC TR 61375-2-7:2014 describes the protocols stack of a radio based wireless train backbone which is used in distributed power freight trains. This part provides information on the physical layer, the data link layer, the application layer and distributed power application.

General Information

• Status: Published
• Publication Date: 09-Apr-2014
• 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
• Current Stage: PPUB - Publication issued
• Start Date: 15-Jul-2014
• Completion Date: 10-Apr-2014

Standards Content (Sample)

IEC TR 61375-2-7 ®
Edition 1.0 2014-04
TECHNICAL
REPORT
colour
inside
Electronic railway equipment – Train communication network (TCN) –
Part 2-7: Wireless Train Backbone (WLTB)

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IEC TR 61375-2-7 ®
Edition 1.0 2014-04
TECHNICAL
REPORT
colour
inside
Electronic railway equipment – Train communication network (TCN) –

Part 2-7: Wireless Train Backbone (WLTB)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
V
ICS 45.060 ISBN 978-2-8322-1518-0

– 2 – IEC TR 61375-2-7:2014 © IEC 2014
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Terms, definitions and abbreviations . 7
2.1 Terms and definitions . 7
2.2 Abbreviations . 9
3 Architecture . 10
3.1 Framework of the train communication backbones . 10
3.2 Distributed power train compositions . 11
3.3 Communication protocols of the WLTB nodes . 11
4 Physical layer . 12
4.1 General . 12
4.2 Transmission power . 12
4.3 Frequency . 12
4.4 Modulation . 12
4.5 Antenna and feeder . 12
5 Data link layer . 13
6 Application layer . 13
6.1 Communication schedule . 13
6.1.1 General . 13
6.1.2 Flow chart of sending command by the WNL . 14
6.1.3 Flow chart of receiving command data and status data by the WNGs. 15
6.1.4 Addressing . 16
6.2 PDU . 16
6.3 Network security . 17
7 WLTB inauguration . 17
7.1 General . 17
7.2 Parameters . 18
7.3 Procedure . 18
7.4 User Dataset . 19
7.4.1 InaugInfoCheckRequest1 . 19
7.4.2 InaugInfoCheckRequest2 . 21
7.4.3 InaugInfoCheckResponse . 22
7.4.4 InaugTestRequest . 22
7.4.5 InaugtestResponse . 23
7.4.6 InaugCompletionRequest . 23
7.4.7 InaugCompletionResponse . 23
8 Process data communication . 24
8.1 General . 24
8.2 LTV process dataset . 24
8.3 GTV process dataset . 24
9 Distributed power operation application . 24
9.1 Operating conditions . 24
9.2 Function model . 25
9.2.1 Remote control process . 25
9.3 Function definition . 25

9.3.1 General . 25
9.3.2 Train composition . 25
9.3.3 Operation direction . 26
9.3.4 Primary energy . 26
9.3.5 Main switch . 26
9.3.6 Air and pneumatics . 27
9.3.7 Traction and dynamic brake . 27
9.3.8 Emergency brake . 28
9.3.9 Equipment protection . 28
9.3.10 Handling of communication loss . 28
9.3.11 Data verification . 28
Annex A (informative) Nation code specification . 29
Bibliography . 31

Figure 1 – Framework of the Train Communication Backbones . 10
Figure 2 – WLTB in a distributed power train composed of 3 traction vehicles . 11
Figure 3 – OSI-ISO model and structure of WLTB communication protocols . 11
Figure 4 – Example of communication in a train composed of 4 traction vehicles . 14
Figure 5 – Flow chart of sending command data by the WNL . 15
Figure 6 – Flow chart of the GTV . 16
Figure 7 – Structure of PDU . 17
Figure 8 – Procedure of inauguration . 19
Figure 9 – Logic diagram of the remote control process . 25
Figure 10 – Train composition cases . 25

Table 1 – Channels and frequencies of the radio . 12
Table 2 – Specifications of the antenna and feeder . 13
Table 3 – Segments of the address for the WLTB node . 16
Table 4 – PDU for the inauguration . 17
Table 5 – InaugInfoCheckRequest1 user dataset . 20
Table 6 – InaugInfoCheckRequest2 user dataset . 21
Table 7 – InaugInfoCheckResponse user dataset . 22
Table 8 – InaugTestRequest user dataset . 22
Table 9 – InaugTestResponse user dataset . 23
Table 10 – InaugCompletionRequest user dataset . 23
Table 11 – InaugCompletionResponse user dataset . 23
Table 12 – LTV process dataset. 24
Table 13 – GTV process dataset . 24
Table A.1 – Nation identification code . 29

– 4 – IEC TR 61375-2-7:2014 © IEC 2014
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRONIC RAILWAY EQUIPMENT –
TRAIN COMMUNICATION NETWORK (TCN) –

Part 2-7: Wireless Train Backbone (WLTB)

FOREWORD
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