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Authors: Steve Fotso 1 ; Régine Laleau 2 ; Hector Barradas 3 ; Marc Frappier 4 and Amel Mammar 5

Affiliations: 1 Université Paris-Est Créteil, LACL, Créteil, France, Université de Sherbrooke, GRIL, Québec and Canada ; 2 Université Paris-Est Créteil, LACL, Créteil and France ; 3 ClearSy System Engineering, Aix-en-Provence and France ; 4 Université de Sherbrooke, GRIL, Québec and Canada ; 5 Télécom SudParis, SAMOVAR-CNRS, Evry and France

ISBN: 978-989-758-379-7

Keyword(s): Saturn Rail Communication Protocol, Requirements Engineering, Formal Models, Domain Modeling, Railway, SysML/KAOS, B System, Event-B.

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 d erive 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. (More)

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Paper citation in several formats:
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

@conference{icsoft19,
author={Steve J. Tueno Fotso. and Régine Laleau. and Hector Ruiz 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},
}

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

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