Case study description

The telematics systems under test are integrated in-car entertainment and infotainment components such as the Head Unit (central user interface for the driver), Navigation System, Radio, Audio Amplifier, CD Changer etc. Most of the telematics features are realised by the simultaneous interplay of these components (e.g. on receiving a telephone call, the CD Player is paused and the Audio Amplifier allocates audio channels to allow for hands free speech using microphones and speakers built into the dashboard).

The figure below shows the architecture of the automotive telematics case study. A tester (a special test component) connected to the telematics ring sends test cases in form of messages and observes the behaviour of the telematics components. For accessing and observing the MOST ring two special devices, called Optolyzers, are used. Test cases specified in TTCN-3 and executed on this telematics configuration are simulating user actions on the Head Unit as for example the switching between the CD Player and the Radio.