From the specification to the scheduling of time-dependent systems

Abstract

This paper introduces and formalizes a new variant of Timed Automata, called Time Labeled Scheduling Automata. A Time Labeled Scheduling Automaton is a single clock implementation model expressing globally the time constraints that a system has to meet. An algorithm is presented to show how a Time Labeled Scheduling Automaton can be synthesized from a minimal reachability graph derived from a high-level specification expressing the composition of different time constraints. It is shown how the reachability graph may be corrected before synthesizing the Time Labeled Scheduling Automaton to remove all its potentially inconsistent behaviors. Current applications of the model are the scheduling of interactive multimedia documents and a simple illustration is given in this area.