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Resumen de Decentralized observability of discrete event systems with synchronizations

Alessandro Giua, Cristian Mahulea, Carla Seatzu

  • Abstract This paper deals with the problem of decentralized observability of discrete event systems. We consider a set of sites each capable of observing a subset of the total event set. When a synchronization occurs, each site transmits its own observation to a coordinator that decides if the word observed belongs to a reference language K or not. Two different properties are studied: uniform q -observability and q -sync observability. It is proved that both properties are decidable for regular languages. Finally, under the assumption that languages K and L are regular, and all the events are observable by at least one site, we propose a procedure to determine the instants at which synchronization should occur to detect the occurrence of any word not in K , as soon as it occurs. The advantage of the proposed approach is that most of the burdensome computations can be moved off-line.


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