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Erschienen in:
2013 | OriginalPaper | Buchkapitel
Controllable-Choice Message Sequence Graphs
verfasst von : Martin Chmelík, Vojtěch Řehák
Erschienen in: Mathematical and Engineering Methods in Computer Science
Verlag: Springer Berlin Heidelberg
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We focus on the realizability problem of Message Sequence Graphs (MSG), i.e. the problem whether a given MSG specification is correctly distributable among parallel components communicating via messages. This fundamental problem of MSG is known to be undecidable. We introduce a well motivated restricted class of MSG, so called controllable-choice MSG, and show that all its models are realizable and moreover it is decidable whether a given MSG model is a member of this class. In more detail, this class of MSG specifications admits a deadlock-free realization by overloading existing messages with additional bounded control data. We also show that the presented class is the largest known subclass of MSG that allows for deadlock-free realization.