Modeling of ERTMS Level 2 As an Sos and Evaluation of Its Dependability Parameters Using Statecharts Siqi Qiu, Mohamed Sallak, Walter Schön, and Zohra Cherfi-Boulanger
This article has been accepted for inclusion in a future issue of this journal. Content is final as presented, with the exception of pagination. IEEE SYSTEMS JOURNAL 1 Modeling of ERTMS Level 2 as an SoS and Evaluation of its Dependability Parameters Using Statecharts Siqi Qiu, Mohamed Sallak, Walter Schön, and Zohra Cherfi-Boulanger Abstract—In this paper, we consider the European Rail Traffic INCOSE International Council on Systems Engineering. Management System (ERTMS) as a System-of-Systems (SoS) and GSM-R Global System for Mobile communications— propose modeling it using Unified Modeling Language statecharts. Railways. We define the performance evaluation of the SoS in terms of dependability parameters and average time spent in each state RTM Radio Transmission Module. (working state, degraded state, and failed state). The originality BTM Balise Transmission Module. of this work lies in the approach that considers ERTMS Level 2 TIU Train Interface Unit. as an SoS and seeks to evaluate its dependability parameters by DMI Driver Machine Interface. considering the unavailability of the whole SoS as an emergent EVC European Vital Computer. property. In addition, human factors, network failures, Common- Cause Failures (CCFs), and imprecise failure and repair rates are RBC Radio Block Center. taken into account in the proposed model. EEIG European Economic Interest Group. MUT Mean Up Time. Index Terms—Common-Cause Failures (CCFs), dependability, emergent property, European Rail Traffic Management System MDT Mean Down Time. (ERTMS), human factors, network failures, statecharts, System- MTTF Mean Time to Failure. of-Systems (SoS). MTBF Mean Time Between Failures. ACRONYMS ERTMS European Rail Traffic Management System.
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