The major goal of unified European train control, signaling, and train protection system, ETCS (European Train Control Systems), has led to highly complex functionality for the onboard units, which converts into a level of complexity for the safety critical software not seen on rail vehicles before. A lack of standardization on various levels, different national homologation procedures and a diversity of operational rules to be covered, combined with interfacing to several legacy systems during a lengthy transitional period has to be considered as a major cost driver. Therefore, even compared with some of the more sophisticated legacy Automatic Train Protection (ATP) and ATC systems in Europe ETCS has turned out to be far more expensive without providing much if any additional performance or safety advantages. Due to ambiguities in the system requirement specification (SRS) various deviations have been revealed in several projects, so that even the ultimate goal of full interoperability has not yet been accomplished. Therefore the development of ETCS has to be considered as 'work in progress', resulting in many software upgrades to be expected in the near and distant future. Since almost all products on the market are based on proprietary software, this means a low degree of standardization for the most complex component as well as life-long dependency to the original equipment manufacturers with high cost of ownership for vehicle holders and operators. Therefore an open source approach has been suggested, not only covering the embedded control software of the ETCS onboard unit itself, but including all tools and documents in order to make the whole product life cycle as transparent as possible optimizing economy, reliability, safety and security alike. This concept is called 'open proof' a new approach for the railway signaling sector. A dual licensing concept is suggested, based on the European Union Public License with a 'copy left' provision on the one hand, combined with a non-copy left 'for-fee-license' on the other hand to provide a cost sharing effect for participating suppliers and service providers. By offering a trusted repository, a dedicated sources code access policy in combination with a release schedule policy, economical as well as safety and security considerations can be taken into account.


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    Titel :

    'Open proof' for railway safety software - A potential way-out of vendor lock-in advancing to standardization, transparency, and software security


    Weitere Titelangaben:

    Die Eisenbahn-Sicherheits-Software Open Proof


    Beteiligte:


    Erscheinungsdatum :

    2011


    Format / Umfang :

    34 Seiten, 12 Bilder, 43 Quellen




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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