• Research on Experimental Application of Train Control Center and Interlocking Integrated System
• Li Wentao, Xie Kang, Kang Hui
• 2024 Vol. 21 (10): 1-6. DOI:10.3969/j.issn.1673-4440.2024.10.001
• Abstract ( ) PDF (1262KB)( )
• The Train control center and Interlocking integrated System (TIS) is a new safety-critical control system that meets the needs for safe operation of railway station equipment. The experimental application of the TIS system equipment on the Ruoqiang-Hetian Railway plays an exemplary role in the technical upgrading and development of signaling control system equipment. This paper describes the main functions and technical characteristics of the TIS system. In view of the experimental application of the TIS system on the Ruoqiang-Hetian Railway, it also summarizes and analyzes the differences between the TIS system and the traditional relay interlocking system from the aspects of construction and maintenance, which provides support and reference for the operation, maintenance and engineering application of the TIS system.
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• Design and Control Method of Safe Switching Module
• Ding Huan, Ren Xiguo, Han Shuai
• 2024 Vol. 21 (10): 7-11,41. DOI:10.3969/j.issn.1673-4440.2024.10.002
• Abstract ( ) PDF (1396KB)( )
• To solve the shortcomings of long switching time and poor reliability in the double-system hot standby switching of the vital computer platform of existing signaling systems, this paper presents the design of a switching module with high reliability and safety. It also provides the analysis and verification of the system scheme and control logic of the proposed module. When any system of the vital computer platform is abnormal, the main and backup systems of the platform and the safe switching module determine the status of the main and backup systems after the secure communication and operation of the dual-mode interface. This enables the fast, undisturbed and safe switching and smooth operation of the platform, thereby improving system safety and reliability.
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• Discussion on Section Train Number Tracking Based on New Train Control System
• Qu Yisheng
• 2024 Vol. 21 (10): 12-15,48. DOI:10.3969/j.issn.1673-4440.2024.10.003
• Abstract ( ) PDF (1039KB)( )
• The train location information is combined with the real-time track circuit status information to carry out multi-level train locating. A logical tracking method is proposed for section train number tracking based on a new train control system. The proposed method solves the problem that the CTC system cannot achieve the logical tracking of train number when multiple trains enter the same block section under the new train control system, and provides accurate and reliable train number information for dispatching commands.
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• Impact Analysis of Different Broken Chainge Settings of Railway Operation Mileage in Train Control System
• Xu Yu, Liu Changbo
• 2024 Vol. 21 (10): 16-21,93. DOI:10.3969/j.issn.1673-4440.2024.10.004
• Abstract ( ) PDF (1181KB)( )
• The broken chainage information is critical for the railway line mileage and train control data, and is essential for ensuring the safety of train operation and the accurate issuance of temporary speed restriction (TSR) commands. There are remarkable differences in broken chainage identification between the broken chainage regulations issued in 2014 and 2024. To fully identify the impact range and safety of these differences, this paper provides a traversal description and makes an analysis of different scenarios of issuing TSR commands to reach the conclusion of no safety risk. It also provides an impact summary and gives recommendations to provide reference during the transition period before the adjustment of the operation mileage and the modification of the train control system of existing railways.
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• Analysis and Application of Comprehensive Management System for Computer Based Interlocking Test
• He Ding, Liu Chongjun, Zou Yao, Dong Yan, Su Chen
• 2024 Vol. 21 (10): 22-28. DOI:10.3969/j.issn.1673-4440.2024.10.005
• Abstract ( ) PDF (1794KB)( )
• The Computer Based Interlocking (CBI) system serves as core equipment for train operation, and the CBI test has a direct bearing on the normal operation of the CBI system. To improve the efficiency in conducting CBI tests and avoid the risk of failure in manually preparing test records, a comprehensive management system is established for railway CBI tests. The data analysis and computer technologies are used to achieve whole-process recording for interlocking test data, and standardized templates are established to provide template documents for interlocking tests. After the tests are completed, the data technology is used to analyze the interlocking data, which provides guidance for subsequent interlocking tests.
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• 5G-R System Coverage Scheme for Long Railway Tunnels
• Ren Chao, Liu Weichuan, Ge Weitao
• 2024 Vol. 21 (10): 29-34. DOI:10.3969/j.issn.1673-4440.2024.10.006
• Abstract ( ) PDF (1223KB)( )
• Due to the limited number of RRUs connected by BBUs and limited remote signal distance of optical fibers between BBUs and RRUs in the 5G-R system, and in view of the difficulties in the construction and maintenance of long tunnels, the 5G-R system coverage scheme for long tunnels deserves special attention under the condition of no BBU in the tunnel. On the basis of a survey of the equipment manufacturers and an analysis of the published technical conditions of the 5G-R system, this paper firstly analyzes the characteristics and networking method of 5G-R base stations. It then studies the link budget of and proposes a RRU setting interval for the 5G-R system in tunnels. In view of the scenarios of long tunnels of different lengths, it finally provides suggestions on the coverage scheme for the 5G-R system in tunnels of different lengths under the condition of no BBU in the tunnel.
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• Research on Reliability Technologies for Train-Wayside Wireless Communication of Rail Transport Based on Public Network
• Wang Xiao, Wang Xiaoyang
• 2024 Vol. 21 (10): 35-41. DOI:10.3969/j.issn.1673-4440.2024.10.007
• Abstract ( ) PDF (1263KB)( )
• In view of the potential risks related to reliability and security when the train control data are carried by the public networks of telecom operators, this paper studies the reliability technologies for train-wayside wireless communication of rail transport based on the public network, and presents the adoption of the L2TP tunneling technology and IPSec encryption technology to protect the transmission channels and improve the reliability of data transmission. Based on the application locations of these two technologies, three network deployment schemes are proposed for train-wayside wireless communication, and comparative analysis is made among these three schemes.
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• Research on Construction Scheme for Network Management Cloud Platform of Railway Communication
• 2024 Vol. 21 (10): 42-48. DOI:10.3969/j.issn.1673-4440.2024.10.008
• Abstract ( ) PDF (1245KB)( )
• The traditional network management architecture of railway communication faces the challenges of low resource utilization rate, poor scalability and low reliability. In view of the actual situation of engineering design, this paper analyzes and compares two architecture of cloud infrastructure, and considers the existing resources of the bearer network system of a certain communication network management center of China Railway Guangzhou Group Co., Ltd., to propose a construction scheme for the network management cloud platform of the railway communication bearer network. The proposed scheme involves the fused application of cloud computing, virtualization technology and railway communication network management to enhance network management efficiency, reduce the cost of operation and maintenance and increase network flexibility.
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• Research on Resource Management System for Railway Data Communication Network Based on NetFlow and SNMP Protocols
• Chen Xiaoping, Liu Chang
• 2024 Vol. 21 (10): 49-54. DOI:10.3969/j.issn.1673-4440.2024.10.009
• Abstract ( ) PDF (1042KB)( )
• To improve the resource management as well as operation and maintenance efficiency of the railway data communication network, this paper studies the resource management mechanism for the data communication network. NetFlow and SNMP protocols are used to achieve automatic data collection on the equipment resources, IP resource utilization situation, service online status and service behavior characteristics of the railway data communication network. Test environment design, resource management system development and deployment as well as field testing are conducted to verify the resource management mechanism for railway data communication network based on the NetFlow and SNMP protocols. The proposed resource management system can profile the service flow, and describe such service attributes as source port, destination port, protocol, traffic volume, service type and location. It can achieve the dynamic monitoring of IP address resources, simplify the statistical calculation, analysis and allocation of IP addresses, and improve the utilization efficiency of IP resources.
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• Research on Construction and Maintenance of Public Mobile  Communication Network for Railway Stations
• Ding Jie
• 2024 Vol. 21 (10): 55-60. DOI:10.3969/j.issn.1673-4440.2024.10.010
• Abstract ( ) PDF (1252KB)( )
• To meet the growing demand of various parties for mobile communication, there has been continuous iteration and upgrading of the public mobile communication network for railway stations. For lack of effective preliminary planning and supervision, various telecom operators have built public mobile communication networks but have brought some security hazards in railway stations. On the basis of a survey of the current operation and maintenance situation of the existing public mobile communication networks in railways stations, this paper carries out in-depth research from the aspects of design, construction and maintenance. It also sorts out main issues and puts forward scientific and effective countermeasures in relation to construction and maintenance, which better improves passenger travel experience, and further ensures railway transport safety.
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• Optical Fiber Online Monitoring System Based on Idle Transmission Ports
• Yao Wei, Zhu Zengzheng
• 2024 Vol. 21 (10): 61-65. DOI:10.3969/j.issn.1673-4440.2024.10.011
• Abstract ( ) PDF (1063KB)( )
• This paper introduces and analyzes the working principles and limitations of traditional optical fiber online monitoring systems. It also proposes a new optical fiber monitoring system based on idle transmission ports. It provides a detailed description of the key technologies, implementation method and actual results as well as an in-depth explanation of the core components and working principles of the new system. The proposed system utilizes the idle transmission ports of the existing transmission equipment in the communication equipment rooms to monitor optical signal transmission and reception, which eliminates the need for additional fault nodes and poses no safety hazards to safe railway operation. The real-time acquisition, processing and display of optical power data allows the accurate monitoring of the performance of optical fiber links and the timely identification of issues and provision of fault judgments, which provides an effective solution for the stable operation of optical fiber communication lines.
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• Research on Optimization Design Scheme for Dynamic Inspection System of 450 MHz Wireless Train Dispatching Communication System
• Qiao Zhi
• 2024 Vol. 21 (10): 66-72. DOI:10.3969/j.issn.1673-4440.2024.10.012
• Abstract ( ) PDF (2155KB)( )
• In view of China’s current policies for the 450-470 MHz frequency band, this paper explains the current operation situation of the 450 MHz wireless train dispatching communication system and the necessity of conducting dynamic inspection for the existing in-use equipment. After an introduction to the 450 MHz wireless train dispatching communication system and the starting mode of dynamic inspection of wireless field strength, it studies the operation method of dynamic inspection for wireless train dispatching communication system, and proposes a dynamic inspection system for the 450 MHz wireless train dispatching communication system. In view of the shortcomings of the current starting mechanism for field strength testing, it provides optimization suggestions for the inspection system.
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• Technology Research on Driver Machine Interface Compatible with CTCS and CBTC Systems
• Zhang Youbing, Zhu Zhicheng, He Fengxiang, Huang Rui
• 2024 Vol. 21 (10): 73-79. DOI:10.3969/j.issn.1673-4440.2024.10.013
• Abstract ( ) PDF (1275KB)( )
• To achieve “Integration of Four Networks”, it is necessary to make use of urban (suburban) railways as the connection and linkage, and it is a must to integrate two signaling types, i.e. CTCS system and CBTC system, to support cross-line train operation. This paper provides a detailed introduction to the composition of an integrated onboard equipment system compatible with both CTCS and CBTC systems, with a focus on the composition, working principles and key technologies of an integrated DMI system. The integrated DMI system supports the interface display of both CTCS and CBTC systems, and allows the automatic switchover of interface display based on control rights, which saves installation space, reduces equipment costs and has a high intelligence level. It can be widely used for urban railways that need to support cross-line operation of CTCS and CBTC trains.
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• Research and Application of Train Graph Optimization for Energy Saving Based on Cloud Platform for Urban Rail Transit
• Yu Ke, Ma Kai, Shao Chuanbo, Zhang Hui
• 2024 Vol. 21 (10): 80-87,107. DOI:10.3969/j.issn.1673-4440.2024.10.014
• Abstract ( ) PDF (1779KB)( )
• To address the challenges brought by the expansion of the urban rail transit network, this paper focuses on the problem of how to reduce energy consumption during networked operations, and proposes the establishment of a cloud platform for urban rail transit and the development of a new optimization model for train energy saving. The proposed model significantly enhances the utilization rate of regenerative braking energy by optimizing the train headways across different lines and increasing the overlap in traction and braking scenarios, and thus effectively reduces the energy consumption for the network’s operations. Moreover, the network storage function of the cloud platform further promotes the resource sharing and interoperable operations among various lines. This research not only charts a course for the future development of urban rail transit, but also has significant scientific and practical value in terms of resource sharing as well as operation and maintenance management.
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• Fare Clearing Scheme for Urban Rail Transit Based on Mobile Phone Signaling Data
• Huang Zhiwei, Li Daming, Chen Kehang
• 2024 Vol. 21 (10): 88-93. DOI:10.3969/j.issn.1673-4440.2024.10.015
• Abstract ( ) PDF (1215KB)( )
• Fare clearing is one of the key problems faced by urban rail transit networks with complex structure and multiple operators. In-depth research on the fare clearing method for urban rail transit has great significance in further improving the accuracy of fare clearing and effectively ensuring the fair and reasonable distribution of ticket revenue among various operators. This paper first introduces the general fare clearing method of urban rail transit for seamless transfer; then proposes a fare clearing scheme based on the mobile phone signaling data, and gives a brief explanation through an example; and finally summarizes the proposed scheme.
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• Scheme Design of Operation and Maintenance System for Onboard Signaling and Communication Equipment of Urban Railways
• Li Guoqiang, Ye Yibiao, Wang Shuaiqiang
• 2024 Vol. 21 (10): 94-100. DOI:10.3969/j.issn.1673-4440.2024.10.016
• Abstract ( ) PDF (2876KB)( )
• On the basis of a survey of the current situation of Chinese and foreign railways, this paper presents the achievement of innovative application by drawing on the good construction and application experience of national railways, and taking into account the operational characteristics of urban railways. It summarizes the operation and maintenance needs of onboard signaling and communication equipment, and proposes an intelligent operation and maintenance system for the onboard signaling and communication equipment of urban railways. The proposed system achieves the integration of comprehensive monitoring, intelligent inspection and repair management of the onboard signaling and communication equipment, the equipment health management across the whole lifecyle, and the dynamic intelligent management of the train control data of the signaling and communication equipment. It breaks the data barriers across various disciplines and systems, and improves the quality of comprehensive equipment management.
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• Research on Simulation Testing for Fault Isolation Function Between Platform Screen Doors and Train Doors of FAO Signaling System
• Jin Yungong
• 2024 Vol. 21 (10): 101-107. DOI:10.3969/j.issn.1673-4440.2024.10.017
• Abstract ( ) PDF (1181KB)( )
• In the FAO train control system, an additional fault isolation function is provided between the platform screen doors and train doors in contraposition. Before the fault isolation function is implemented, the relevant functions need to be tested. The fault isolation function is achieved through the linked operation of multiple systems. The traditional test method involves the manual simulation of fault conditions, including the physical operation of the platform screen doors and train doors, and the manual simulation of the signaling systems, and has the problems of low efficiency and high costs. To meet the test requirements of improving efficiency and reducing costs, this paper presents the design of a simulation testing device for the fault isolation function. On the basis of a study of the indoor testing principles of the relevant functions, it proposes a scheme for the simulation testing device, and presents the achievement of the indoor testing function for the fault isolation function of the FAO signaling system. The proposed simulation testing device can effectively improve the product integration capability of the train control signaling system, and further ensure passenger safety and normal train operation.
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• Study on Application of New Balise in Urban Rail Signaling Systems
• Zan Zhuang
• 2024 Vol. 21 (10): 108-113. DOI:10.3969/j.issn.1673-4440.2024.10.018
• Abstract ( ) PDF (1135KB)( )
• The new balise can achieve function extension on the basis of the existing balise. This paper studies how to achieve train-to-wayside communication, automatic tracking of train front and rear end locations, train section and track occupancy detection as well train integrity detection while retaining the existing functions. The new balise simplifies the equipment types of signaling system, reduces the quantity of wayside equipment, and lowers construction and maintenance costs. It can either form part of a low-cost and efficient intermittent signaling system or serve as the backup mode of a CBTC system, and can ensure real-time emergency response through low-cost wireless communication methods.
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