Bounded MSC communication

  • Authors:
  • Markus Lohrey;Anca Muscholl

  • Affiliations:
  • Universität Stuttgart, FMI, Universitätsstrasse 38, 70569 Stuttgart, Germany;LIAFA, Université Paris VII, 2, place Jussieu, case 7014, 75251 Paris cedex 05, France

  • Venue:
  • Information and Computation
  • Year:
  • 2004

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Abstract

Message sequence charts (MSCs) and high-level message sequence charts (HMSCs) are popular formalisms for the specification of communication protocols between asynchronous processes. An important concept in this context is the size of the communication buffers used between processes. Since real systems impose limitations on the capacity (or speed) of communication links, we ask whether a given HMSC can be implemented with respect to a given buffer size imposed by the environment. We introduce four different measures for buffer sizes and investigate for each of these measures the complexity of deciding whether a given MSC (or HMSC, or nested MSC) satisfies a given bound on the buffer size. The complexity of these problems varies between the classes P, NP, and coNP.