This paper analyzes the hidden danger sand causes of giant network in railway transmission system, proposes to set DCC transparent transmission to solve the problem of giant ECC network, and to solve the hidden dangers that may lead to abnormal switching of two-fiber shared multiplex section protection ring (MSP) after subnetting. Trough the detailed analysis of the actual situation of the railway network, the advantages and disadvantages of DCC transparent transmission are summarized to provide reference for the networking application in the later stage.

Machine learning has many theoretical researches and applications in turnout fault detection and diagnosis technology because of its advantages such as adaptive processing of large amounts of data, realization of intelligent classification and prediction. This paper classifies and sorts out data-based turnout fault diagnosis algorithms, and focuses on the feature extraction and data-based modeling methods, which have certain guiding significance for the selection and application of machine learning algorithms. Finally, by analyzing the current research status of turnouts in prognostics and health management, the application of machine learning in the field of turnout fault prognostics and health management is prospected.

Due to the particularity of switch equipment, it is difficult to obtain real-time operation parameters, which restricts the development of maintenance mode of switch equipment. Based on the existing sensor technology and switch machine monitoring requirements, combined with the safety and reliability requirements of the switch machine, this paper puts forward the switch machine moni-toring items that can be implemented at this stage, and takes ZDJ9 switch machine as an example for implementation. The measured parameters can be used as the basic data for subsequent processing, and can be used for fault prediction and health diagnosis of switch machine.

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.

An AFC system directly serves the vast number of passengers, and its operation status is directly related to the level of operation safety and services. Intelligent operation and maintenance is of great significance to the system. Firstly, this paper analyzes the connotation of the intelligent operation and maintenance of AFC systems, analyzes the problems existing in the operation and maintenance of the current AFC system, and points out the necessity and urgency of the intelligent operation and maintenance of AFC systems.Then, the functions of the service scenario of intelligent operation and maintenance are analyzed, and the design scheme of an AFC intelligent operation and maintenance system is given from two aspects: the design of system architecture and of service architecture.Finally, this paper puts forward suggestions on the application and implementation of the intelligent operation and maintenance system from two aspects: network standards, and operation and maintenance ideas.The AFC intelligent operation and maintenance system can effectively improve the level of operation and management and reduce their costs, which are the inevitable results of intelligent management.

The track circuit is one of the important signaling equipment to monitor the idle rail line and reflect the train operation. In application of 25 Hz track circuit, the red light strap fault, especially the flashing red fault, which is easily affected by the change of the equipment characteristics and the interference of the external environment, is very difficult to deal with in an emergency, and interferes greatly with the normal transportation order. This paper makes an analysis and discussion on how to deal with the faults of 25 Hz track circuit, making full use of monitoring, adjustment and analysis combined with frequency shift meter, and adopting the method of combining voltage method with current method to rapidly and effectively handle the red light strap fault in track circuit.

The signaling and communication system is an important equipment to ensure the safe operation of trains, and it is the key to ensure the safe and stable operation of signaling and communication equipment for newly-built lines by forming a set of effective organization and implementation scheme for joint debugging and commissioning of signaling and communication system. Combining with the practical experience of organization, implementation and management of joint debugging and commissioning for the signaling and communication system in recent years, from establish rules and regulations system, strict on safety management, to carry out the key card control, strengthening emergency disposal, improve the quality problem to overcome, and improve the mechanism of rewards and punishments in this paper, the analysis of how to realize the high speed railway signal system group company level alignment al try to organize the implementation of standardized management.

Aiming at the problem of how to continuously improve the effectiveness and efficiency of interlocking software test, this paper analyzes the requirements of automatic interlocking software test, and takes the gray-box test as an idea, adopting a hierarchical framework structure, to design and implement an automatic test system based on script driver. The automatic test system can improve the efficiency of computer interlocking test and guarantee the reliability of computer interlocking test.

GSM-R system will evolve to 5G-R system. Before the 5G-R system is put into use, the GSM-R system still needs to be built, and the 5G-R system and the GSM-R system will operate simultaneously for a period of time in the future. Therefore, this paper makes an in-depth discussion from the aspects of equipment evolution, service realization and infrastructure sharing, and puts forward the 5G-R and GSM-R infrastructure sharing project scheme, to ensure smooth transition from GSM-R to 5G-R and protect investment in railway construction.

The construction standards of conventional and high speed railways are different, and the coverage schemes of 5G-R are also different. Aiming at different scenarios such as conventional railway and high speed railway, this paper studies the networking scheme of 5G-R wireless access network in tunnel and non-tunnel areas along the railway lines, respectively analyzes the advantages and disadvantages of the two schemes with and without bridge, and proposes the scheme for reference for railway 5G-R network planning.

This paper studies the realization scheme of intelligent parking lot for super large comprehensive transportation hubs, and solves many problems such as low operating efficiency of traditional parking lots, difficulties in reverse car search, low utilization rate of parking spaces, single payment method, poor safety and poor travel experience. With the comprehensive use of AI, 5G, indoor positioning and navigation, cloud computing, big data, mobile payment and other emerging technologies, through the hub integrated management platform to deeply integrate each subsystem, and receive external information such as smart city and smart transportation, to form a highly collaborative intelligent parking system. After the completion of the smart parking lot, it can effectively improve the operation efficiency of the hub, relieve parking and traffic pressure, improve service level and travel convenience, protect the safety of people's lives and property, and promote social and economic development.

The technologies for dynamic optimization function of metro fleet composition include physical coupling/decoupling technologies and virtual coupling/decoupling technologies. This paper focuses on the study on physical coupling/decoupling technologies, providing a relevant signaling system solution. Based on the analysis of the operation requirements, this paper presents the target of physical coupling and decoupling functions, and introduces the coupling and decoupling processes. Meanwhile, it also discusses the methods for realizing such key technologies as coupling speed control, train interface, location report transmission mechanism, and the switchover of the leading end of a newly coupled train, taking into consideration the CBTC features for interoperability.

In this paper, aiming at the current situation for the difficult and complicated artificial fault diagnosis of ZPW-2000A track circuit, according to its common faults, the causes and modes of faults are analyzed, and the fault diagnosis of ZPW-2000A track circuit is discussed by using several techniques of artificial intelligence theory, such as expert system, artificial neural network, and fuzzy theory.

Through the introduction of big data technology, the platform established based on the line networking data center has gradually replaced the previous integrated monitoring system of single grid level. This paper analyzes and studies the application requirements, application ideas, application methods and business scenarios of big data technology in rail transit construction, and forms intelligent decision analysis through big data analysis technology to assist the coordination command of urban rail line networking and provide powerful support services of big data.

This paper summarizes the development history of interlocking system and train control center system in China. Based on the experience of high-speed railway development, it analyzes the application status and problems of individually configuration of train control center equipment and interlocking equipment in Chinese Train Control System (CTCS) in China. Combined with the latest development direction of technology, this paper also discusses the application prospect and advantage of full electronic train control and interlocking integrated equipment in future engineering.

This paper starts with the classification of the EU railway standards, outlines the background, history and composition of TSI and introduces the TSI directive and rules, clarifies the position of CCS TSI in the EU railway standards by top-down and step-by-step breakdown. It also analyzes the composition of different ERTMS baselines and three versions of ERTMS baselines and studies the main evolution and development trend of baseline 3 maintenance release 1 to baseline 3 release 2, and provides technical advice for signaling system adopting EU railway standards.

This paper introduces the concept of integrated travel service, analyzes the design objectives of the integrated travel service platform, proposes the design elements and overall architecture of the platform based on the design objectives, and introduces the implementation scheme of the platform from four layers: perception layer, network layer, platform layer and application layer, which provides a good reference for the construction of the whole chain integrated travel service system and is conductive to promote the development of urban traffic circle and the formation of new ecology for integrated transportation.

Flexible coupling is the key to improve train operation efficiency and achieve dynamic balance between transportation capacity and demand. Combined with the operation scenarios of flexible coupling trains, aiming at the operating mode, this paper analyzes the adaptability of Fully Automatic Operation (FAO) system to flexible coupling operation from three aspects of coupling, keeping and decoupling train set formation, and puts forward a feasible solution of operating mode based on FAO system.

Through elaborating the current status of the existing railway mobile communication private network and researching the requirements of railway mobile communication applications, three typical railway application requirements are highlighted. Combined with the practical application of railway, the concept of railway 5G private network is proposed, and the functional architecture of railway 5G private network is focused on. Based on this, three deployment plans of railway 5G private network that meet the requirements of current railway mobile private network construction are proposed. The advantages and disadvantages of the respective solution provide a certain theoretical basis for the future construction of railway mobile communication networks, and also provide the basic support for the rapid landing of "5G + Railways" and the intelligent development of railways.

Various application scenarios are realized through the Internet of Things (IoT) in an urban rail transit system by adding various sensors and communication modules that enable the terminals of all technical fields to be controllable, manageable and interoperable. This paper analyzes the technology and development of IoT, mainly discusses the application of IoT technology in AFC systems of urban rail transit, studies the perception layer, network layer and application layer, provides the system architecture, and finally discusses the outlook for the development of urban rail transit industry based on IoT.