1、 IEC 61375-2-5 Edition 1.0 2014-08 INTERNATIONAL STANDARD NORME INTERNATIONALE Electronic railway equipment Train communication network (TCN) Part 2-5: Ethernet train backbone Matriel lectronique ferroviaire Rseau embarqu de train (TCN) Partie 2-5: Rseau central de train Ethernet IEC 61375-2-5:2014-
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19、 - webstore.iec.ch/csc Si vous dsirez nous donner des commentaires sur cette publication ou si vous avez des questions contactez-nous: csciec.ch. IEC 61375-2-5 Edition 1.0 2014-08 INTERNATIONAL STANDARD NORME INTERNATIONALE Electronic railway equipment Train communication network (TCN) Part 2-5: Eth
20、ernet train backbone Matriel lectronique ferroviaire Rseau embarqu de train (TCN) Partie 2-5: Rseau central de train Ethernet INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE XF ICS 45.060 PRICE CODE CODE PRIX ISBN 978-2-8322-1772-6 Registered trademark of the Int
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22、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 Base of numeric values 17 3.3.1Naming convention
23、s . 17 3.3.2State diagram conventions . 17 3.3.3Annotation of data structures 17 3.3.4 4 ETB physical layer . 17 4.1 Train regions . 17 4.2 Physical characteristics . 18 General . 18 4.2.1Intra car physical layer . 18 4.2.2Inter car physical layer . 20 4.2.3Inter Consist physical layer 24 4.2.4 4.3
24、Power over Ethernet (PoE) 27 4.4 ETB physical architecture and redundancy. 29 General . 29 4.4.1Link aggregation architecture . 29 4.4.2Functions . 31 4.4.3 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
25、General . 34 6.3.1Closed train . 35 6.3.2 6.4 Network IP address map . 36 Global IPv4 address space . 36 6.4.1Train subnet definition 36 6.4.2Train IP address map summary 40 6.4.3Train IP group addresses (multicast) 41 6.4.4 6.5 Particular hosts IP addresses 41 ETBN (Ethernet Train Backbone Node) .
26、41 6.5.1Hosts on train subnet . 42 6.5.2Host inside a closed train . 43 6.5.3 6.6 Some use cases 45 6.7 Dynamic IP routing management . 48 Unicast routes 48 6.7.1Multicast routes . 48 6.7.2 7 ETB Transport layer . 49 8 ETB Train Inauguration: TTDP . 50 IEC 61375-2-5:2014 IEC 2014 3 8.1 Contents of t
27、his clause 50 8.2 Objectives and assumptions 50 Goals . 50 8.2.1Out of scope 51 8.2.2Assumptions 51 8.2.3 8.3 ETBN settings . 52 ETB switch port states . 52 8.3.1Node settings . 52 8.3.2 8.4 General behaviour . 54 8.5 ETBN Inauguration state diagram 54 General . 54 8.5.1Actions 55 8.5.2Transitions .
28、 57 8.5.3 8.6 ETBN peers discovery . 58 Internal peers detection 58 8.6.1External peers detection . 58 8.6.2Switch port states handling. 59 8.6.3ETB lines statuses . 59 8.6.4 8.7 TTDP messages description 61 General . 61 8.7.1Convention 61 8.7.2TTDP frame tagging . 61 8.7.3Transport and addressing .
29、 61 8.7.4TTDP HELLO frame . 62 8.7.5TTDP TOPOLOGY frame . 66 8.7.6 8.8 TTDP data structures 72 Connectivity Vector 72 8.8.1ETBN Vector 73 8.8.2Connectivity Table . 73 8.8.3Connectivity Table CRC . 74 8.8.4Train network directory . 76 8.8.5Train network directory CRC (Topology Counter) 78 8.8.6Correc
30、ted topology . 78 8.8.7 8.9 TTDP frames timing 79 TTDP HELLO . 79 8.9.1TTDP TOPOLOGY . 81 8.9.2 8.10 Inauguration Train Application interface . 83 8.11 Degraded modes . 83 Late insertion ETBN . 83 8.11.1Losing ETBN 84 8.11.2End ETBN failure and partial topology counter 84 8.11.3 8.12 Some discovery
31、timing 85 ETBN wakeup 85 8.12.1ETBN failure 86 8.12.2Consist coupling 87 8.12.3 9 ETB ETBN redundancy 88 10 ETB physical train naming convention (optional) . 89 10.1 General . 89 10.2 ETB Train domain . 89 4 IEC 61375-2-5:2014 IEC 2014 10.3 Hostname . 90 11 ETB Quality of Service . 91 11.1 Contents
32、of this clause 91 11.2 Frame forwarding 91 ETBN switching rate . 91 11.2.1No Head-of-Line blocking . 91 11.2.2Switching priorities . 91 11.2.3Switching queuing scheme . 92 11.2.4 11.3 Priority of Inauguration frames . 92 11.4 ETB ingress rate limiting . 92 11.5 ETB egress rate shaping . 92 11.6 ETB
33、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 Application . 94 13.5.1Maintenance
34、and monitoring . 95 13.5.2 14 ETB conformity statement 96 (normative) Summary of ETB sizing parameters 97 Annex A(normative) Physical topology building algorithm . 98 Annex B(normative) TTDP MIB definition 101 Annex C Bibliography . 121 Figure 1 ETB train regions . 18 Figure 2 ETB Inter car at same
35、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
36、 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 s
37、ingle Consist Networks 38 Figure 18 Multiple Consist Networks, without fault tolerance . 39 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 a
38、ddressing 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 Trai
39、n 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 Inaugurati
40、on 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 . 62 Figure 37 LLDP organizationally TLV structure . 62 Figure 38 TTDP HELLO frame structure . 66 Figure 39 TTDP specific HELLO TLV structure . 6
41、6 Figure 40 TTDP TOPOLOGY frame structure 71 Figure 41 TTDP TOPOLOGY specific ETB TLV structure 72 Figure 42 TTDP TOPOLOGY specific CN TLV structure 72 Figure 43 Train composition for TNDir example 77 Figure 44 TTDP HELLO normal mode and recovery timing 80 Figure 45 TTDP HELLO failure timing . 81 Fi
42、gure 46 TTDP TOPOLOGY frames handling 82 Figure 47 TTDP ETBNs wake up timing 85 Figure 48 TTDP ETBN failure timing . 86 Figure 49 TTDP Consist coupling timing . 87 Figure 50 Example of ETBN IP routing table without redundancy 88 Figure 51 Example of ETBN IP routing table with redundancy . 88 Figure
43、52 ETB train domain defintion 90 Figure 53 Abstract communication model for ETB communication . 94 Figure B.1 Physical topology building . 98 Figure C.1 TTDP MIB tree view 103 Table 1 ETB Intra car physical layer interface . 19 Table 2 ETB Inter car physical layer interface . 21 Table 3 ETB Inter co
44、nsist physical layer interface . 25 Table 4 ETB Switch data link layer interface . 32 Table 5 ETB OSI Network layer 33 6 IEC 61375-2-5:2014 IEC 2014 Table 6 Train subnet definition . 36 Table 7 Train subnet decomposition . 37 Table 8 Train IP group addresses reserved range . 41 Table 9 ETBN ETB IP a
45、ddress . 42 Table 10 Hosts IP on train subnet . 43 Table 11 Application ED common interface . 50 Table 12 ETB switch port states . 52 Table 13 TTDP destination MAC addresses 62 Table 14 Connectivity Vector 73 Table 15 Connectivity Vector Fields . 73 Table 16 ETBN Vector . 73 Table 17 ETBN Vector Fie
46、lds . 73 Table 18 Connectivity Table . 74 Table 19 Connectivity Table fields 74 Table 20 Train network directory 76 Table 21 Train network directory fields . 76 Table 22 Train network directory (example) 78 Table 23 DSCP field mapping . 91 Table 24 ETB Switching Priorities . 92 Table 25 Train Topolo
47、gy Discovery Object 95 Table A.1 ETB sizing parameters . 97 IEC 61375-2-5:2014 IEC 2014 7 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ELECTRONIC RAILWAY EQUIPMENT TRAIN COMMUNICATION NETWORK (TCN) Part 2-5: Ethernet train backbone FOREWORD 1) The International Electrotechnical Commission (IEC) is a
48、worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National
