scope:

This part of IEC 61375 specifies rules for the data exchangebetween consists in trains. The aggregation of these rules definesthe TCN communication profile. The objective of the communicationprofile is to ensure interoperability between consists of the saidtrains with respect to the exchange of information. For this itdefines all those items which are necessary for communicationinteroperability: ? an architecture with defined train directionsrelated to different train views ? a common functional addressingconcept ? common communication protocol for data exchange betweenfunctions ? a set of services for train communication control. As arestriction, this communication profile is adhered to the EthernetTrain Backbone (ETB) technology as defined in IEC 61375-2-5.Towards the consist networks, a more abstract interface is definedwhich does not restrict the appliance of any consist networktechnology as for instance MVB (IEC 61375-3-1), CANOpen (IEC61375-3-3) or ECN (IEC 61375-3-4). It is not within the scope ofthe communication profile to define application data content andits meaning (e.g. syntax and semantics). This is within theresponsibility of the application profiles. Namely two applicationprofiles are explicitly supported as shown in Figure 1: the TCMSapplication profile as defined in IEC 61375-2-4, and the onboardmultimedia and telematic services (OMTS) related profiles asdefined in the IEC 62580 series.