A Formal Requirements Modeling Approach: Application to Rail Communication

Steve Fotso, Régine Laleau, Hector Barradas, Marc Frappier, Amel Mammar

2019

Abstract

This paper is about the formal specification of requirements of a rail communication protocol called Saturn, proposed by ClearSy systems engineering, a French company specialised in safety critical systems. The protocol was developed and implemented within a rail product, widely used, without modeling, verifying and even documenting its requirements. This paper outlines the formal specification, verification and validation of Saturn’s requirements in order to guarantee its correct behavior and to allow the definition of slightly different product lines. The specification is performed according to SysML/KAOS, a formal requirements engineering method developed in the ANR FORMOSE project for critical and complex systems. System requirements, captured with a goal modeling language, give rise to the behavioral part of a B System specification. In addition, an ontology modeling language allows the specification of domain entities and properties. The domain models thus obtained are used to derive the structural part of the B System specification obtained from system requirements. The B System model, once completed with the body of events, can then be verified and validated using the whole range of tools that support the B method. Five refinement levels of the rail communication protocol were constructed. The method has proven useful. However, several missing features were identified. This paper also provides a formally defined extension of the modeling languages to fill the shortcomings.

Paper Citation

in Harvard Style

Fotso S., Laleau R., Barradas H., Frappier M. and Mammar A. (2019). A Formal Requirements Modeling Approach: Application to Rail Communication.In Proceedings of the 14th International Conference on Software Technologies - Volume 1: ICSOFT, ISBN 978-989-758-379-7, pages 170-177. DOI: 10.5220/0007809701700177

in Bibtex Style

@conference{icsoft19,
author={Steve Fotso and Régine Laleau and Hector Barradas and Marc Frappier and Amel Mammar},
title={A Formal Requirements Modeling Approach: Application to Rail Communication},
booktitle={Proceedings of the 14th International Conference on Software Technologies - Volume 1: ICSOFT,},
year={2019},
pages={170-177},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0007809701700177},
isbn={978-989-758-379-7},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 14th International Conference on Software Technologies - Volume 1: ICSOFT,
TI - A Formal Requirements Modeling Approach: Application to Rail Communication
SN - 978-989-758-379-7
AU - Fotso S.
AU - Laleau R.
AU - Barradas H.
AU - Frappier M.
AU - Mammar A.
PY - 2019
SP - 170
EP - 177
DO - 10.5220/0007809701700177