Priority Scheduling Versus Pre-Run-Time Scheduling
Real-Time Systems - Selected papers from IFAC/IFIP workshops on real-time programming
Priority Inheritance Protocols: An Approach to Real-Time Synchronization
IEEE Transactions on Computers
Reliability Modelling of Time-Critical Distributed Systems
FTRTFT '00 Proceedings of the 6th International Symposium on Formal Techniques in Real-Time and Fault-Tolerant Systems
Probabilistic Scheduling Guarantees for Fault-Tolerant Real-Time Systems
DCCA '99 Proceedings of the conference on Dependable Computing for Critical Applications
Response Time Analysis under Errors for CAN
RTAS '00 Proceedings of the Sixth IEEE Real Time Technology and Applications Symposium (RTAS 2000)
Reliability Modelling of Time-Critical Distributed Systems
FTRTFT '00 Proceedings of the 6th International Symposium on Formal Techniques in Real-Time and Fault-Tolerant Systems
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In cost conscious industries, such as automotive, it is imperative for designers to adhere to policies that reduce system resources to the extent feasible, even for safety-critical sub-systems. However, the overall reliability requirement, typically in the order of 10-9 faults/hour, must be both analysable and met. Faults can be hardware, software or timing faults. The latter being handled by hard-real time schedulability analysis, which is used to prove that no timing violations will occur. However, from a reliability and cost perspective there is a tradeoff between timing guarantees, the level of hardware and software faults, and the per-unit cost for meeting the overall reliability requirement. This paper outlines a reliability analysis method that considers the effect of faults on schedulability analysis and its impact on the reliability estimation of the system. The ideas have general applicability, but the method has been developed with modeling of external interferences of automotive CAN buses in mind. We illustrate the method using the example of a distributed braking system.