Specification and Analysis of Soft Real-Time Systems: Quantity and Quality
| Title | Specification and Analysis of Soft Real-Time Systems: Quantity and Quality |
| Publication Type | Conference Paper |
| Year of Publication | 1999 |
| Authors | D'Argenio, PR, Katoen, J-P, Brinksma, E |
| Conference Name | Proceedings of the 20th IEEE Real-Time Systems Symposium, Phoenix, AZ, USA, December 1-3, 1999 |
| Publisher | IEEE Computer Society |
| Abstract | This paper presents a process algebra for specifying soft real-time constraints in a compositional way. For these soft constraints we take a stochastic point of view and allow arbitrary probability distributions to express delays of activities. The semantics of this process algebra is given in terms of stochastic automata, a variant of timed automata where clocks are initialised randomly and run backwards. To analyse quantitative properties, an algorithm is presented for the on-the-fly generation of a discrete-event simulation model from a process algebra specification. On the qualitative side, a symbolic technique for classical reachability analysis of stochastic automata is presented. As a result a unifying framework for the specification and analysis of quantitative and qualitative properties is obtained. We discuss an implementation of both analytic methods and specify and analyse a fault-tolerant multi-processor system. |
| DOI | 10.1109/REAL.1999.818832 |
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