Division 4.1.1 BASIC PARAMETERS OF THE SUBSYSTEM: INTERNAL FUNCTIONS

This section specifies the functions of control-command class A equipment that are essential to interoperability. The ETCS functions required for interoperability are:

• the cab-signalling function,

• the automatic train protection function, comprising:

  • selecting the speed supervision mode,

  • defining and providing the intervention function,

  • setting the train characteristics,

• proving train integrity^f1 (note: rolling stock TSI is also concerned),

• equipment health monitoring and failure mode support, comprising:

  • initialising the subsystem,

  • testing the subsystem in service,

  • testing the subsystem in depot,

  • providing failure mode support,

• exchanging data between the trackside assembly and the on-board assembly,

• managing the STMs,

• support to cab-signalling and automatic train protection, comprising:

  • supporting driving,

  • providing odometry,

  • recording data,

  • the vigilance function.

To achieve interoperability it is not necessary to standardise all the functions within the whole control-command and signalling subsystem. The principle followed is the definition of:

• trackside standard functions, able to read data from national interlocking and signalling systems and to translate such data into standard messages for the trains,

• standard interfaces for track-to-train and train-to-track communication,

• on-board standard functions, ensuring that every train will react to data received from trackside in a predictable way.

Only the above mentioned functionality is considered in this chapter.

The GSM-R functions required for interoperability are the voice and data communication between trackside and on-board.

• In Annex A, index 0a, the ETCS functional requirement specifications are indicated.

• In Annex A, index 0b, the GSM-R functional requirement specifications are indicated.

The control-command functions are classified in three categories:

M

standard functions whose implementation is mandatory. For example: the ETCS end-of-movement authority,

O

functions for which the implementation is optional, but if implemented a standard specification applies. For example: GSM-R fax transmission,

N

functions of the national part of control-command. For example: interlocking functions.

The classification of the functions is indicated within the text of the ETCS FRS and the GSM-R FRS.

ETCS functions shall be implemented in accordance with the technical specifications indicated in Annex A, indices 5, 6, 7, 8, 9, and their performance shall conform to indices 2 and 18.

The vigilance function shall be implemented on-board in accordance with Annex A, index 10. Implementation may be:

• outside the ERTMS/ETCS, with an optional interface to the ERTMS/ETCS equipment on-board, or

• inside the ERTMS/ETCS on-board equipment.

The infill data transmission function in ETCS level 1 applications is only mandatory on-board under the conditions defined in section 7.

GSM-R radio functions shall be implemented in accordance with the technical specifications indicated in Annex A, index 11.