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Analysis of a radio mobile communication network availability with reference to railway applications

Summary - RFI and the University of Rome Tor Vergata launched in 2018 a research on the mobile radio system that could replace the GSM-R. At the start of the study, LTE was a strong candidate for this role; however, the continuation of research and the rapid maturation of 5G have changed the application perspective in favour of the latter technology. We point out that the result of this study can be used for the methodological utility as basis for RAMS evaluations of the 5G system. The goal of this research work is to perform a reliability analysis and select the most suitable LTE (Long term Evolution) model according to Italian Infrastructure Manager’s (RFI-Rete Ferroviaria Italiana) needs. Through the Isograph tool, this research work has designed 6 LTE network models. Model 5 allows the LTE network to have a redundant architecture in the core parts, to be deployed to different (geographical) nodes and to work in the pool area. In conclusion, this research work shows that Model 5 is an adequate balance that combines, besides the value of total down-time, the high availability and the possibility to have a redundant network architecture. Those advantages enable RFI (Rete Ferroviaria Italiana) to satisfy the safety requirements of ERTMS.


  • Febbraio
Num. 2
Pag. 103