Dependability and safety properties of an on-board satellite positioning system dedicated to railway safety operations

This article examines how to evaluate dependability and safety performances of on-board railway systems that localize themselves using satellite signals. Several research projects have already shown the interest and the feasibility to use GNSS (Global Navigation Satellite Systems) in railway applications. For the moment, position errors in these applications have no impact on the safety. Today, the use of satellite technologies is envisaged in a safety framework. Indeed, these technologies can answer to interoperability and competitiveness needs of railway transportations, in particular for the traffic management. However, the safe use of GNSS in the developed localization systems requires the RAMS analysis of these systems to comply with railway standards. No evaluation technique exists for the analysis of the signals used by these systems, especially the degradations they undergo in an operating environment. In this article, we propose an approach based on the simulation of a Petri net model. We apply the method to different positioning data obtained in several typical railway environments. The obtained results are presented and discussed.

  • Authors:
    • BEUGIN, Julie
    • MARAIS, Juliette
  • Conference:
  • Publication Date: 2012


  • French

Media Info

  • Media Type: Digital/other
  • Pagination: 9p

Subject/Index Terms

Filing Info

  • Accession Number: 01493049
  • Record Type: Publication
  • Source Agency: Institut Francais des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)
  • Files: ITRD
  • Created Date: Sep 17 2013 11:41AM