关键词: 5G-R, 列控系统, 车地通信系统, 车载电台, PPP

Abstract: The requirements for intelligent train control systems of the new generation of high-speed railways make the train-ground communication data richer and more diverse than before, and there are requirements for safer and more reliable data transmission and for lower delays. The original train control communication system based on GSM cannot meet the new requirements, so it is necessary to develop a new generation of train control communication system based on 5G technology. In this paper, a 5G-R communication system is studied, a new onboard radio based on embedded system is designed, and the structure, composition and interface of ground network system are proposed. The protocol encapsulation/de-encapsulation and the interface transmission process of service data in the whole train-ground transmission process are analyzed in detail, and the adaptability of the new generation of train control communication system to meet the requirements of future train-ground communication is expounded, which lays a communication foundation for intelligent train control for high-speed railways.

Key words: 5G-R, CTCS, train-ground communication system, onboard radio, PPP