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Ph.D. - geht es zur Homepage der Informatik des Fachbereiches 3 ...

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2.2. European Train Control System<br />

ETCS vehicle on-board devic<strong>es</strong><br />

Devic<strong>es</strong> on the train are mainly an European Vital Computer<br />

(EVC), a Driver Machine Interface (DMI), a distance<br />

measurement device 5 , a GSM-R transmitting device<br />

/ Euroradio, a rea<strong>der</strong> for Eurobalis<strong>es</strong>, and an acc<strong>es</strong>s device<br />

to the brake systems. STMs are optional.<br />

Most of those already exist and do not have to be developed <strong>es</strong>pecially for ETCS. Therefore,<br />

the development primary focus<strong>es</strong> on the software-side of railway systems. Figure 2.1 shows<br />

the (simplified) architecture [84, p. 8] of ETCS for track and train. The focus is on the<br />

Train<br />

Track<br />

Odometer<br />

Brak<strong>es</strong><br />

Euroloop<br />

Euroloop Rea<strong>der</strong><br />

EVC<br />

DMI<br />

Driver<br />

Eurobalise<br />

Eurobalise Rea<strong>der</strong><br />

STM<br />

National System<br />

Euroradio<br />

Euroradio<br />

Figure 2.1.: ETCS architecture of track and train (simplified)<br />

communication and the data flow between the components of track and train. The integration<br />

of a control centre is omitted for simplification.<br />

The following sections introduce some central parts for the train operation un<strong>der</strong> ETCS.<br />

2.2.2. Application Levels<br />

The ETCS Application Levels were introduced to distinguish between different safety requirements.<br />

ETCS Level 0 is the low<strong>es</strong>t and 3 the high<strong>es</strong>t. The ETCS Application Level d<strong>es</strong>crib<strong>es</strong>,<br />

which components from Subsection 2.2.1 are available / used in the rail track and in the train.<br />

Trains are downwards compatible but tracks are not [84].<br />

2.2.2.1. Level 0<br />

In this Level, no ETCS track-side components are available. The train conductor only us<strong>es</strong> the<br />

conventional signal and signs [67]. The ETCS on-board equipment only supervis<strong>es</strong> the static<br />

maximum speed of the train and the track [84, pp. 11-12].<br />

5 also called: odometer<br />

15

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