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Digital radio communication system for high-speed rail lines in Poland
Published in Andrzej Żurkowski, High-Speed Rail in Poland, 2018
GSM-R is a system of digital cellular telephony used for railway purposes. The system provides digital voice communication and digital data transmission functionality. It offers extended functionality of the GSM system. System infrastructure is located only near railway lines. The 900 MHz frequency was adopted, in order to prevent electromagnetic interferences. GSM-R role is to assist systems implemented in Europe: European Rail Traffic Management System and European Train Control System, collecting and exchanging rail vehicle data, such as speed or position, on an ongoing basis. GSM-R system is the transmission medium of ETCS, mediating between transmission of information to drivers and railway services. Implementation of the aforementioned systems improves the safety of railway traffic, allows real-time train diagnostics, and monitoring of shipments and wagons/cars. In addition, it may significantly increase the throughput on individual railway lines by allowing accurate determination of distances between trains.
Safety of Transport, Storage and Food Economy:
Published in Andrzej Szymonik, Robert Stanisławski, Supply Chain Security, 2023
Andrzej Szymonik, Robert Stanisławski
The GSM-R is a railway version of the GSM operating in the 900 MHz band and providing users, apart from the “talking” channel, with a digital radio channel for data transmission and performance of functions intended for specialized railway applications. The GSM-R, in addition to the technical communication function for railways, is also a transmission medium for the ETCS levels 2 and 3, through which travel permits issued by a Radio Block Centre (RBC) are sent to individual trains within the area of a given RBC. Updated information is also sent via the GSM-R in the ETCS level 1 system, using the radio infill function.
Application of multifractal detrended fluctuation analysis in fault diagnosis for a railway track circuit
Published in HKIE Transactions, 2018
Zicheng Wang, Yadong Zhang, Jin Guo, Lina Su
The China Railway Corporation developed a technical standard called the China Train Control System (CTCS) in 2002. In order to meet the transport requirements of different railway lines, CTCS was divided into five levels [1]: CTCS-0: consists of a intermittent type cab signal and a monitoring and recording device for the running of the train. The driver drives according to the ground signal;CTCS-1: consists of a continuous type cab signal and a safety device for monitoring and recording the running of the train. The top running speed of trains in CTCS-1 is 160 km h−1;CTCS-2: a typical track circuit based train control (TBTC) system; the track circuit is used to detect train occupancy and to transfer control information to trains. CTCS-2 is suitable for high-speed railways with speed of 200–250 km h−1;CTCS-3: dual-direction transmission of control information is achieved through wireless communication: GSM-R (global system for mobile communication – railway). However, the train occupancy detection still relies on the track circuit. The top running speed of trains in CTCS-3 can reach 300–350 km h−1;CTCS-4: a moving block based train control system. Less trackside equipment is needed, reducing construction and maintenance costs. No technical solutions have been developed until now, but this is the future trend for CTCS.