prEN IEC 61375-2-6:2024

SLOVENSKI STANDARD
01-september-2024
Železniške elektronske naprave - Komunikacijsko omrežje vlaka - 2-6. del:
Komunikacija vlak-tla
Electronic railway equipment - Train communication network (TCN) - Part 2-6: On-board
to ground communication
Elektronische Betriebsmittel für Bahnen - Zug-Kommunikations-Netzwerk (TCN) - Teil 2-
6: Kommunikation vom Zug zur Landseite
Matériel électronique ferroviaire - Réseau embarqué de train (TCN) - Partie 2-6:
Communication train-sol
Ta slovenski standard je istoveten z: prEN IEC 61375-2-6:2024
ICS:
35.240.60 Uporabniške rešitve IT v IT applications in transport
prometu
45.060.01 Železniška vozila na splošno Railway rolling stock in
general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

9/3082/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61375-2-6 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2024-06-28 2024-09-20
SUPERSEDES DOCUMENTS:
9/2838/CD, 9/2876/CC
IEC TC 9 : ELECTRICAL EQUIPMENT AND SYSTEMS FOR RAILWAYS
SECRETARIAT: SECRETARY:
France Mr Denis MIGLIANICO
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:

Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some
Countries” clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is the
final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Electronic railway equipment - Train communication network (TCN) - Part 2-6: On-board to
ground communication
PROPOSED STABILITY DATE: 2030
NOTE FROM TC/SC OFFICERS:
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.

IEC CDV 61375-2-6 © IEC 2024 – 2 – 9/3082/CDV
1 CONTENTS
2 FOREWORD . 9
3 INTRODUCTION . 11
4 1 Scope . 12
5 2 Normative references . 13
6 3 Terms, definitions, symbols, abbreviated terms and conventions . 13
7 3.1 Terms and definitions . 13
8 3.2 Symbols and abbreviated terms . 19
9 3.3 State diagram conventions . 22
10 4 Train to Ground Communication system architecture . 23
11 4.1 General . 23
12 4.2 Requirements . 24
13 4.3 Mobile communication network architecture . 26
14 4.4 System breakdown . 28
15 4.5 Functional breakdown . 28
16 4.5.1 General . 28
17 4.5.2 Data transfer from train to ground . 28
18 4.5.3 Data transfer from ground to train . 29
19 4.5.4 Connection Management between train and ground . 31
20 4.5.5 Addressing functions on a train from groundside applications . 32
21 4.5.6 Addressing groundside applications/functions from a train . 33
22 4.6 Mobile Communication Gateway . 34
23 4.6.1 Architecture . 34
24 4.6.2 Mobile communication gateway . 36
25 4.7 Addressing concept . 37
26 4.7.1 Use cases. 37
27 4.7.2 Consist and train Identification . 37
28 4.7.3 T2G Network Borders . 40
29 4.7.4 T2G minimum network . 40
30 4.7.5 T2G addressing . 41
31 4.7.6 HTTP-URI . 43
32 4.8 Mobile communication redundancy . 44
33 4.8.1 General . 44
34 4.8.2 Full performance redundancy . 45
35 4.8.3 Reduced performance redundancy . 46
36 4.9 Cybersecurity . 46
37 4.9.1 Zones and conduits . 46
38 4.9.2 Security measures . 46
39 4.9.3 Authentication authorization accounting model . 47
40 4.9.4 Network and MCG classification . 48
41 5 Communication framework . 50
42 5.1 General . 50
43 5.2 MCG broker service architecture . 51
44 5.3 Train composition operational changes (Option) . 51
45 5.4 Data classes for T2G communication . 52
46 5.4.1 General . 52
47 5.4.2 Communication channel establishment . 53
48 5.4.3 Message data . 53
49 5.4.4 Process data . 53

IEC CDV 61375-2-6 © IEC 2024 – 3 – 9/3082/CDV
50 5.4.5 Stream Data . 54
51 5.4.6 Bulk data . 54
52 5.5 Communication protocol. 54
53 5.5.1 General . 54
54 5.5.2 HTTP(S) - HTTP running over TLS . 56
55 5.5.3 MQTT (Telemetry / Process Data Option) . 58
56 5.5.4 RTP (Streaming Option) . 58
57 5.6 Communication services . 59
58 5.6.1 General . 59
59 5.6.2 Message data communication service . 60
60 5.6.3 File transfer communication service . 66
61 5.6.4 Process Data Service (Binary Format for Telemetry) . 89
62 5.6.5 Process Data Service (IoT Telemetry) . 93
63 5.6.6 Stream Data Service . 103
64 6 Services and interfaces (MCG) . 105
65 6.1 Overview. 105
66 6.1.1 MCG system service architecture . 105
67 6.1.2 MCG / GCG system service interfaces . 106
68 6.1.3 MCG / GCG communication relationship . 106
69 6.2 MCG / GCG system service description . 107
70 6.2.1 Communication Services . 107
71 6.2.2 Capability detection . 108
72 6.2.3 Train Location Service (Option) . 116
73 6.2.4 Train Information Service . 120
74 6.2.5 MCG Network Selector Service . 125
75 6.2.6 Train telemetry service (Option) . 127
76 6.2.7 MCG Train Wake-up Service (Option) . 137
77 6.2.8 MCG Poll Command Set Service (Option) . 144
78 7 Services and interfaces (GCG) . 151
79 7.1 GCG Overview . 151
80 7.2 GCG Addressing . 153
81 7.2.1 Wireless MCG Interface . 153
82 7.2.2 Ground GCG Interface . 153
83 7.3 GCG Implementation . 153
84 7.3.1 General (informative) . 153
85 7.3.2 GCG Availability . 154
86 7.3.3 GCG Workload . 154
87 7.3.4 GCG Security . 154
88 7.4 GCG services . 154
89 7.4.1 GCG services protocol . 154
90 7.4.2 GCG Fleet Database . 154
91 7.4.3 MCG-GCG services . 154
92 7.4.4 File transfer communication service . 155
93 7.4.5 Local Ground GCG Interface. 155
94 7.4.6 Home GCG – Foreign GCG services . 156
95 7.4.7 Public Ground GCG services . 156
96 Annex A (normative)  JSON Message presentation . 158
97 A.1 General . 158
98 A.2 Transmission rules . 158
99 A.3 Generic message .
...