Design of Reliable Real-Time Applications Distributed over CAN (Controller Area Network)
Résumé
Real-time applications distributed over the CAN network are characterized by stringent temporal and dependability constraints. Our goal is to take account of transmission errors in the design of real-time distributed applications because in practice the consequences of such disturbances are potentially disastrous. In the paper, we propose, on the one hand, a method for computing for each message the tolerable threshold of transmission errors guaranteeing the timing constraints to be met. On the other hand, we also suggest an error model enabling us to consider both error frequency and error gravity. Our error model follows a generalized Poisson process and its stochastic parameters have been derived. The analysis has been applied to an industrial case-study to compute the probability that the deadlines will be respected.