This page intentionally left blank. Formal Description of Telecommunication Services
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Abstract:
Abstract. This paper shows how an engineer could write a full formal description of the service layer of a telecommunication system, organized according to the Distributed Feature Composition virtual architecture. Descriptions in Promela and Z can be composed using a joint semantics based on the transition-axiom method. The described system can be reasoned about in several ways, including use of tools developed for the individual languages. 1. The Distributed Feature Composition virtual architecture Distributed Feature Composition (DFC) is a new architecture for the description of telecommunication services. One of its primary design goals was feature modularity. The other of its primary design goals was abstraction away from most implementation detail (hence the term "virtual"). As it appears to achieve these goals to a useful degree, it provides a good foundation for the application of formal methods to telecommunications. DFC was developed by Michael Jackson and myself. A full definition of the architecture, along with motivations, intuitive explanations, and examples, can be found elsewhere [6,13]. We are currently exploring various extensions, analysis/verification
