Communication-Based Train Control (CBTC) system is a critical signal system to ensure rail transit’s safe operation. Compared with the train-ground CBTC system, the train control system based on train-to-train (T2T) communication has the advantages of fast response speed, simple structure, and low operating cost. As the core part of the train control system based on T2T communication, the reliability of the data communication system (DCS) is of great significance to ensure the train’s safe and efficient operation. According to the T2T communication system requirements, this paper adopts Long-Term Evolution-Unlicensed (LTE-U) technology to design the DCS structure and establishes the reliability model of the communication system based on Deterministic and Stochastic Petri Nets (DSPN). Based on testing the real line’s communication performance parameters, the DSPN model is simulated and solved by -tool, and the reliability index of the system is obtained. The research results show that the LTE-U-based T2T communication system designed in this paper meets the train control system’s needs for communication transmission. This paper’s reliability evaluation method can complete the reliability modeling of train control DCS based on T2T communication. The research in this paper will provide a strong practical and theoretical basis for the design and optimization of train control DCS based on T2T communication.

中文翻译：

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CBTC中基于LTE-U的火车到火车通信系统：系统设计和可靠性分析

基于通信的列车控制（CBTC）系统是确保铁路运输安全运行的关键信号系统。与列车地面CBTC系统相比，基于列车到列车（T2T）通信的列车控制系统具有响应速度快，结构简单，运行成本低的优点。作为基于T2T通信的列车控制系统的核心部分，数据通信系统（DCS）的可靠性对于确保列车的安全高效运行具有重要意义。根据T2T通信系统的要求，本文采用长期无执照技术（LTE-U）设计DCS结构，建立基于确定性和随机Petri网（DSPN）的通信系统可靠性模型。-工具，并获得系统的可靠性指标。研究结果表明，本文设计的基于LTE-U的T2T通信系统能够满足列车控制系统对通信传输的需求。本文的可靠性评估方法可以完成基于T2T通信的列车控制DCS的可靠性建模。本文的研究将为基于T2T通信的列车控制DCS的设计和优化提供强大的实践和理论基础。