Manz, H.; Schnieder, L.; Schnieder, E.:
Requirements of rail safety specification to satellite based localization systems.
EURO - Zel 2010 - 18th International Symposium EURO - Zel 2010, ''5 2010.


Requirements of rail safety specification to satellite based localization systems Hansjörg Manz, Dr.-Ing. Lars Schnieder, Prof. Dr.-Ing. Dr. h.c. Eckehard Schnieder Technische Universität Braunschweig, Institute for Traffic Safety and Automation Engineering Address: Langer Kamp 8, 38106 Braunschweig, Germany Phone: (+49) 531-391-3322, Fax: (+49) 531-391-5197, E-mail: This paper presents a new approach for specifying a satellite based railway localization system by means of ontology-based system engineering. The objective is the application for safety relevant and highly precise localization tasks in railways. The presented approach gives the railway domain the opportunity to phrase its requirements in its own terminology compliant to existing standards followed by translation to a commonly valid terminology. Furthermore this approach enables government organizations and developers to harmonize domain specific requirements to localization. The main content of this paper will be the illustration of a method to define and phrase a common terminology valid for railway and satellite applications. Today each transport domain has several standards and regulations in parallel which define the requirements of location determination. Each domain – railway, road, aviation and maritime – has specified its own domain specific terminology and requirements, for example for the terms accuracy and availability. Railway standards define the requirements to safety relevant functions and requirements, e.g. localization, in detail. In contrast the development of the Galileo system stems from the aerospace perspective. There is a lack of interfaces between the terminologies of those systems which complicate the development of satellite based localization systems fulfilling the needs of potential users. To solve the problem of different domain specific terminologies, this paper presents an approach for harmonization and transfer based on advanced linguistic foundation of terminologies and their formalization by means of class diagrams. Class diagrams are used here as a formal description of hierarchic attributes in terminology such as term, property and characteristic up to single data. Furthermore the relations between different items of terminology are displayed. Hence the misleading discrepancy between different domain specific interpretations of synonyms can be revealed and avoided. As results of the work undertaken this paper presents terminologies of the domains railway and satellite systems and their linguistic interfaces as well as their implementation into IGLOS. IGLOS is the acronym for "intelligent glossary" which is a terminology management system developed by the Institute for Traffic Safety and Automation Engineering. Thus this work is a base for the future development of a common terminology of all transport modes which enables the recognition according to the generally accepted codes of practice and standards.