Abstract

The article describes an experience on using the formal description technique LOTOS for developing a protocol architecture on a real time embedded multiprocessor systems. The product developed during the project is a satellite communications mobile terminal 1 to be installed on board of aircrafts, ships, or trucks. The objective of the experiment has been evaluating the impact of using formal languages for systems specification and design, in the software life cycle. The use of behaviour equivalences and hiding in LOTOS, as well as its precise semantical definition, give a powerful basis for analyzing the design of a system which clearly supersedes the normal approach to design analysis based on walk-throughs, inspections, reachability analysis, etc, … The main phases of the project development are analyzed, with emphasis on the influence of using LOTOS in the design cycle.

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