Analysis of the analogue and digital cooperation of the railway radio communications in the context of the emergency call

The paper presents the selected issues concerning the migration between the VHF 150 MHz communication and the GSM-R standard, which will be operated in the Polish railway industry at the same time. The analysis of the RADIOSTOP railway alarm signals in the VHF 150 MHz radio communication network was conducted. The service of the REC emergency call in the GSM-R system was characterised. Then, the technical problems related to the generation of alarm signals in the migration period were described. In addition to the problems associated with the technical aspect of connection of both alarm signals, the issues resulted from their radio range were analysed. Emergency call service REC / e-REC in the GSM-R system, analysis and assessment of the implementation of the emergency call function during the migration period, phases of the REC emergency call, railway emergency call service, generation of the alarm signals during the migration of systems, differences in the range of the GSM-R and VHF 150 MHz systems, implementation of GSM-R on the entire railway line are presented in the paper.