MODELLING OF SAFETY-RELATED COMMUNICATIONS FOR RAILWAY APPLICATIONS
DOI:
https://doi.org/10.15802/stp2016/83915Keywords:
safety integrity level, railway applications, safety-related communications, safety code, CRC, Matlab, modelingAbstract
Purpose. The authors according to requirements of the standard valid for safety-related communication between interlocking systems (EN 50159) analyze the situation of message undetected which is transmitted across BSC channel. The main part is orientated to description of model with CRC code used for messages assurance across noise communication channel. Methodology. For mathematical description of encoding, decoding, error detection and error correction is used algebra of polynomials. Findings. The determination of the intensity of dangerous failure caused by the electromagnetic interference was calculated. Originality. To obtain information on the probability of undetected error in transmission code and safety code and on the intensity of dangerous failure from the motel it was created program with graphical interface. To calculate the probability of undetected error for any block code (n, k) was created a supporting program that displays the probabilityof undetected error for selected interval of error bit rate. Practical value.From the measured and calculated values obtained by the simulation one can see that with increasing error bit rate is increasing also intensity of dangerous failures. Transmission code did not detect all corrupted messages therefore it is necessary to use safety code independent on transmission code in safety-related applications. CRC is not able to detect errors if all bits are logical 0.
References
Białoń, A., & Pawlik, M. (2014). Bezpieczeństwo i ryzyko na przykładzie urządzeń sterowania ruchem kolejowym. Problemy kolejnictwa, 163, 25-41.
Cauner, R. (2015). Models of transmission systems with cyclic code generation via SW tool Matlab for safety-related applications. In: Slovak. Diploma work. Žilina: University of Žilina.
Clark, G. C., & Jr. and J. Bibb Cain, (1988). Error–Correction Codes for Digital Communications. New York: Plenum Press. doi:10.1007/978-1-4899-2174-1
Franeková, M., Kállay, F., Peniak, P., & Vestenický, P. (2007). Communication security of industrial networks: In Slovak, Komunikačná bezpečnosť priemyselných sietí. Žilina: EDIS ŽU.
EN 50159: Railway applications. Communication, signalling and processing systems. Safety-related communication in transmission systems (2010).
Franeková, M., Pirník, R., & Pekár, L. (2014). Modelovanie prenosu dát v prostredí Matlab, Simulink a Communications Sytem Toolbox. Žilina: Žilinská univerzita.
Muzikářová, Ľ., & Franeková, M. (2009). Teória informácie a signálov. Žilina: Žilinská univerzita.
Popov, G., Hristova, M., & Hristov, H. (2012). Methods of increasing reliability of Semi-Ergatic Systems in extreme situation. Latest Trend in Applied Informatics and Computing. Paper presented at 3rd Intern. Conf. on Applied Informatics and Computing Theory (AICT 2012), Barcelona.
Published
How to Cite
Issue
Section
License
Copyright and Licensing
This journal provides open access to all of its content.
As such, copyright for articles published in this journal is retained by the authors, under the terms of the Creative Commons Attribution 4.0 International License (CC BY 4.0). The CC BY license permits commercial and non-commercial reuse. Such access is associated with increased readership and increased citation of an author's work. For more information on this approach, see the Public Knowledge Project, the Directory of Open Access Journals, or the Budapest Open Access Initiative.
The CC BY 4.0 license allows users to copy, distribute and adapt the work in any way, provided that they properly point to the author. Therefore, the editorial board of the journal does not prevent from placing published materials in third-party repositories. In order to protect manuscripts from misappropriation by unscrupulous authors, reference should be made to the original version of the work.
