This paper presents methods to easily increase the dependability and fault tolerance of a scalable bit-oriented cyclic protocol, QRcontrol, utilizing TDMA technique. Minor changes to the protocol software and built-in techniques in the controller can give increased dependability for changing requirements on the system. These techniques include for example enabling of double buses, checksums for a node or a whole TDMA cycle, bus guardians and different fault detection mechanisms for some or all nodes in the cluster. In the present work a prototype system is implemented. Fault injection and simulation methods are used to evaluate the system dependability. This is also one of the advantages using the same 'backbone' protocol. The same set of test devices and tools can be used. The concept can be assigned to a very broad range of applications, from body electronics in cars to 'By-Wire' applications with the highest dependability requirements.
Achieving a cost efficient and dependability scalable system for automotive applications, using the QRcontrol communication protocol
Kostengünstiges skalierbares Kommunikationsprotokoll für Automotive-Anwendungen
2001
5 Seiten, 4 Bilder, 5 Quellen
Conference paper
English
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