Specification and verification of multimedia synchronization scenarios using Time-Estelle
Software—Practice & Experience
Compositional Validation of Time-Critical Systems Using Communicating Time Petri Nets
IEEE Transactions on Software Engineering
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Verification of formal specifications for multimedia systems, with time taken into consideration, is still a subject of much research. Estelle, an internationally standardised Formal Description Technique (FDT) based on an extended finite state machine model, does not have enough expressive power to describe timing behaviours of distributed multimedia systems. To address this limitation, we have developed Time-Estelle, an extended Estelle which is capable of doing so. We also have developed a methodology for verifying Time-Estelle specification, which includes time properties. The verification method [1] involves translating a Time-Estelle specification to Communicating Time Petri Nets, which can then be verified using the tool, ORIS. In this paper, we describe the results obtained by applying our method to a real-life multimedia protocol, the Reliable Adaptive Multicast Protocol (RAMP).