Expressing environment assumptions and real-time requirements for a distributed embedded system with shared variables

Apresentado na 6th IFIP TC10 Working Conference on Distributed and Parallel Embedded Systems (DIPES 2008), no âmbito do 20th IFIP World Computer Congress, Milão, Itália, set/2008.In a distributed embedded system, it is often necessary to share variables among its computing nodes to allow the distribution of control algorithms. It is therefore necessary to include a component in each node that provides the service of variable sharing. For that type of component, this paper discusses how to create a Colored Petri Nets (CPN) model that formally expresses the following elements in a clearly separated structure: (1) assumptions about the behavior of the environment of the component, (2) real-time requirements for the component, and (3) a possible solution in terms of an algorithm for the component. The CPN model can be used to validate the environment assumptions and the requirements. The validation is performed by execution of the model during which traces of events and states are automatically generated and evaluated against the requirements.(undefined

Formal requirements modeling with executable use cases and Coloured Petri Nets

This paper presents executable use cases (EUCs), which constitute a model-based approach to requirements engineering. EUCs may be used as a supplement to model-driven development (MDD) and can describe and link user-level requirements and more technical software specifications. In MDD, user-level requirements are not always explicitly described, since usually it is sufficient that one provides a specification, or platform-independent model, of the software that is to be developed. Therefore, a combination of EUCs and MDD may have potential to cover the path from user-level requirements via specifications to implementations of computer-based systems

Designing tool support for translating use cases and UML 2.0 Sequence Diagrams into a Coloured Petri Net

Using a case study on the specification of an elevator controller, this paper presents an approach that can translate given UML descriptions into a Coloured Petri Net (CPN) model. The UML descriptions must be specified in the form of Use Cases and UML 2.0 Sequence Diagrams. The CPN model constitutes one single, coherent and executable representation of all possible behaviours that are specified by the given UML artefacts. CPNs consitute a formal modelling language that enables construction and analysis of scalable, executable models of behaviour. A combined use of UML and CPN can be useful in several projects. CPN is well supported by CPN Tools and the work we present here is aimed at building a CPN Tools front-end engine that implements the proposed translation.Fundação para a Ciência e a Tecnologia (FCT) - SFRH/BSAB/607/200

Validation Support for Distributed Real-Time Embedded Systems in VDM++

Contains fulltext : 36669.pdf (preprint version ) (Open Access

Model-based Testing of a Reactive

In this paper, a reactive and nondeterministic system is tested. This is done by applying a generic model that has been specified as a configurable Coloured Petri Net. In this way, model-based testing is possible for a wide class of reactive system at the level of discrete events. Concurrently executed tasks are specified at a high level of abstraction and test traces are collected through state space analysis of the model