Computer Science (Jan 2002)

Time Extensions of Petri Nets for Modelling and Verification of Hard Real-Time Systems

  • Tomasz Szmuc,
  • Slawomir Samolej

Journal volume & issue
Vol. 4, no. 1
pp. 55 – 77

Abstract

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The main aim ofthe paper is a presentation of time extensions of Petri nets appropriate for modelling and analysis of hard real-time systems. It is assumed, that the extensions must provide a model of time flow an ability to force a transition to fire within a stated timing constraint (the so-called the strong firing rule), and timing constraints represented by intervals. The presented survey includes extensions of classical Place/Transition Petri nets, as well as the ones applied to high-level Petri nets. An expressiveness of each time extension is illustrated using simple hard real-time system. The paper includes also a brief description of analysis and veryication methods related to the extensions, and a survey of software tools supporting modelling and analysis ofthe considered Petri nets.

Keywords