CN118790322A - A kind of conventional railway station interlocking route information security transmission equipment - Google Patents

Abstract

The interlocking route transmission equipment of the present invention is a miniaturized station-level signal safety equipment installed at the station, which realizes the safe transmission of interlocking route information to the on-board train control equipment. It includes a communication interface unit, a main control unit, a power supply unit and a maintenance unit. The main control unit receives the interlocking route information sent by the station interlocking equipment, performs safety verification, adds the station-related number to the verified interlocking route information to form the station interlocking route identification number information, and sends it to the communication interface unit; the interlocking route transmission equipment adopts a dual-system structure, and the two systems are respectively connected to the operation display machine and the electrical maintenance machine of the station interlocking equipment. The failure of a single system does not affect the normal operation of the interlocking route transmission equipment. Technical advantages of the present invention: the interlocking route transmission equipment does not directly interface with the interlocking host, which can improve the adaptability of the interface modification of the existing line station interlocking equipment; it can solve the problem of the safe interface of the interlocking route information; the dual-system structure is adopted to meet the reliability requirements of the train control system.

Description

A kind of conventional railway station interlocking route information security transmission equipment

Technical Field

The present invention belongs to the field of train operation control, and in particular relates to a conventional railway station interlocking route information security transmission device and method.

Background Art

The basic function of the train control system is to effectively ensure the safety of train operation without interfering with the normal driving of the locomotive crew. It is mainly composed of on-board train control equipment and ground train control equipment. There are many ways to transmit information between train and ground equipment, among which wireless communication is being used more and more widely. In response to the needs of conventional railway transportation safety and technological development, the industry is currently studying the use of existing conventional railway wireless communication networks to achieve train-to-ground communication of the train control system and transmit ground station interlocking information to on-board train control equipment. This solution is expected to become an important part of the conventional railway train control system.

The current railway wireless communication networks, such as GSM-R networks, all have core network equipment installed in the railway dispatching center. The train control system uses this wireless communication network, and generally needs to set up central train control equipment in the dispatching center. On the one hand, it interfaces with the wireless communication core network to meet the requirements of vehicle-ground information interaction of the train control system. On the other hand, it centralizes the control functions of the train control ground equipment to the center, further optimizes the system structure, and reduces the train control ground equipment. This puts forward the requirement to transmit the interlocking route information of stations along the railway to the central train control equipment. At the same time, in order to meet the safety requirements of the train control system, the acquisition and transmission functions of the interlocking route information need to meet the railway signal safety requirements.

The conventional railway train control system will be mainly implemented on existing railways, adding station train control equipment and interfacing with existing station interlocking equipment to transmit route information. If it is directly interfaced with its interlocking host, it is necessary to expand the interlocking host safety hardware equipment and modify the interlocking host core control software, which directly affects the railway driving safety. The change control process is strict, the change implementation steps are many, the change time cycle is long, and the safety pressure of on-site operation and management departments is high. At the same time, the upgrade and transformation of the conventional train control system involves long lines and many stations, which makes the feasibility of the scheme with the station interlocking host interface even smaller. Therefore, it is necessary to study an equipment interface scheme that does not involve the transformation of the existing line station interlocking host to meet the requirements of the conventional train control system engineering implementation. At the same time, the central train control equipment in the scheme controls and manages multiple station interlocking equipment along the line, and each station interlocking equipment controls multiple operating routes at the same time. It is necessary to study a method for controlling the transmission of interlocking route information to meet the requirements of information security transmission and improve safety processing performance. That is, it is necessary to invent a conventional railway station interlocking route information transmission equipment and control method, aiming at the transformation of existing line signal equipment, to achieve the goals of low cost, short cycle and high efficiency, and to meet the requirements of safe transmission and control of the train control system.

Summary of the invention

The present invention proposes a conventional railway station interlocking route information security transmission device, which can realize the secure transmission of station interlocking route information to a central train control device via a railway communication transmission network or a signal security data network.

The interlocking route information safety transmission equipment (hereinafter referred to as interlocking route transmission equipment) is a miniaturized station-level signal safety equipment installed at the station, which realizes the safe transmission of interlocking route information to the on-board train control equipment. Its functional units include a communication interface unit, a main control unit, a power supply unit and a maintenance unit.

The communication interface unit is an interface unit between the interlocking route transmission device and the station interlocking device, the railway communication transmission network or the railway signal safety data network, which receives the interlocking route information sent by the station interlocking device and sends it to the main control unit, and receives the station interlocking route identification number sent by the main control unit and sends it to the central train control device through the railway communication transmission network or the railway signal safety data network;

The main control unit receives the interlocking route information sent by the station interlocking device, performs safety verification, adds the station-related number to the interlocking route information that passes the verification to form the station interlocking route identification number information, and sends it to the communication interface unit;

The maintenance unit is connected to the railway signal centralized monitoring data network, establishes communication with the centralized monitoring system, and transmits the status information and alarm information of the interlocking route transmission equipment to the centralized monitoring system in real time;

The interlocking route transmission equipment adopts a double-system structure, and the two systems are respectively connected to the operation display machine and the electrical maintenance machine of the station interlocking equipment. A single-system failure will not affect the normal operation of the interlocking route transmission equipment.

The present invention also proposes a method for controlling the safe transmission of interlocking route information of conventional railways, which is used to realize the safety verification of station interlocking route information sent by the interlocking route transmission equipment by the on-board train control equipment and the central train control equipment of the conventional railway train control system, so as to ensure the safety and reliability of the transmission of interlocking route information.

Technical advantages of the present invention: The interlocking route transmission equipment of the present invention does not directly interface with the interlocking host, which can improve the adaptability of the interface modification of the interlocking equipment of the existing line station; it can solve the problem of the interlocking route information security interface; it can realize the unified and standardized design of the interlocking route transmission equipment, and each device only needs to be configured with fixed parameters, which improves the applicability of the equipment in engineering applications; the method for interactive interlocking route information between the interlocking route transmission equipment, the central train control equipment and the on-board train control equipment can realize the multiple verification of the ground train control equipment information by the on-board train control equipment, and further ensure the security of the interlocking route information transmission; the interlocking route transmission equipment adopts a dual-system structure, and is redundantly connected to the interlocking equipment, the railway communication transmission network or the railway signal safety data network, which can meet the reliability requirements of the train control system.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention, the figures required for use in the embodiments will be briefly introduced below. Obviously, the figures described below are only some embodiments of the present invention. For ordinary technicians in this field, other figures can be obtained based on these figures without paying creative work.

Figure 1 is a schematic diagram of the connection and jurisdiction of the interlocking route transmission equipment and the central train control equipment

Figure 2 is a functional block diagram of the interlocking route transmission equipment and a schematic diagram of the interface connection

Figure 3(a) is a schematic diagram of the connection between the interlocking route transmission equipment and the station interlocking equipment

Figure 3(b) is a schematic diagram of the redundant connection between the interlocking route transmission equipment and the station interlocking equipment

Figure 4 is a schematic diagram of the safe transmission and verification process of the interlocking route identification number

DETAILED DESCRIPTION

The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help technicians further understand the present invention, and the embodiments are only illustrative and should not be construed as any form of limitation of the present invention. It should be pointed out that any modification and improvement made by technicians without departing from the concept of the present invention belongs to the protection scope of the present invention.

The present invention is based on the existing conventional railway CTCS-0 level system. By adding interlocking route information security transmission equipment (hereinafter referred to as interlocking route transmission equipment) at the station, adding central train control equipment at the center, and adding necessary safety protection measures to the transmission process and information, etc., the interlocking route information is securely transmitted to the on-board train control equipment.

Interlocking route transmission equipment is installed at the station, interfaces with the station interlocking equipment, obtains interlocking route information, and transmits it to the central train control equipment through the railway communication transmission network or the railway signal safety data network. The central train control equipment is installed in the dispatching center, corresponding to the central equipment of the railway train dispatching and command system (TDCS) or the dispatching centralized system (CTC). The scope of the station under its jurisdiction is consistent with the CTC/TDCS dispatching center equipment. It obtains station interlocking route information through the railway communication transmission network or the railway signal safety data network, and communicates with trains in the stations under its jurisdiction through the wireless communication network, and transmits the route information to the on-board train control equipment. The on-board train control equipment performs speed monitoring according to the received route information.

Figure 1 is a schematic diagram of the connection and jurisdiction of the interlocking route transmission equipment and central train control equipment proposed in an embodiment of the present invention. The central train control equipment controls and manages multiple interlocking route transmission equipment along the line. Each interlocking route transmission equipment is connected to a station interlocking equipment. Each station interlocking equipment controls multiple operating routes at the same time, that is, each central train control equipment can manage multiple route information of multiple stations at the same time. Through this hierarchical structure design, the control functions of the train control ground equipment are centralized to the center, further optimizing the train control system structure.

The interlocking route transmission equipment does not perform train control business-related logical conversion or mapping processing on the received interlocking route information. It directly selects the corresponding interlocking route number from the received data, adds the corresponding station-related number information, and then sends it to the central train control equipment. This means that the interlocking route information is transparently transmitted, which can realize the unified and standardized design of the interlocking route transmission equipment. Each device only needs to be configured with necessary parameters such as the address.

The interlocking route transmission device of the present invention is mainly composed of functional units such as a communication interface unit, a main control unit, a power supply unit and a maintenance unit. Figure 2 is a functional structure and interface diagram of the interlocking route transmission device proposed in an embodiment of the present invention.

The communication interface unit is an interface unit between the interlocking route transmission equipment and the station interlocking equipment, the railway communication transmission network or the railway signal safety data network. It receives the interlocking route information sent by the interlocking equipment and sends it to the main control unit, and receives the station interlocking route identification number sent by the main control unit and sends it to the central train control equipment through the railway communication transmission network or the railway signal safety data network.

The station interlocking equipment refers to the equipment that controls the station's switches, routes and signals and realizes the interlocking relationship between them. It is mainly composed of an operating indication machine, an electrical maintenance machine, an interlocking host machine, and an execution indication device. Among them, the interlocking host machine and interlocking route transmission equipment are safety equipment that meet the requirements of the train control system, and the operating indication machine and the electrical maintenance machine are non-functional safety requirement equipment.

The railway communication transmission network is an existing network of existing conventional railways, and is mainly a comprehensive special communication network used for transmitting and exchanging various information between railway command and management agencies at all levels, stations, and yards. The railway signal security data network is not an existing network of existing conventional railways and needs to be rebuilt. It is mainly used for the secure interaction of data between ground train control equipment.

The central train control equipment is set up in correspondence with the CTC/TDCS dispatching desk to manage the interlocking route transmission equipment of the same number of stations; it obtains temporary train control data from the CTC/TDCS equipment and route information from the station interlocking route transmission equipment, centrally completes the interlocking route information, train control temporary data and other ground variable control vehicle data control and transmission functions, and also has the function of communicating with the wireless communication network center interface.

Figure 3(a) is a schematic diagram of the connection between the interlocking route transmission equipment proposed in an embodiment of the present invention and the station interlocking equipment interface through a communication interface unit. The interlocking route transmission equipment is interfaced with the operation display machine and the electrical maintenance machine of the station interlocking equipment, and is not directly interfaced with the interlocking host of the interlocking equipment, i.e., there is no need to modify or upgrade the interlocking host, thereby meeting the needs of interface modification of existing line interlocking equipment and improving the feasibility of modification. After the operation indication machine and the electrical maintenance machine receive the interlocking route information sent by the interlocking machine host and add the necessary security protection information, they directly and transparently forward it to the interlocking route transmission equipment through the above-mentioned interface channel, that is, the route information packet is not unpacked and parsed, etc., to ensure the authenticity of the data, avoid data being destroyed or tampered with during transmission, and improve the security of the interlocking route information transmission channel function; constitute two interlocking route information transmission channels of "interlocking host-operation indication machine-interlocking route transmission equipment" and "interlocking host-electrical maintenance machine-interlocking route transmission equipment", and the dual channels use different communication protocols, without random failures and system common cause failures, that is, the hardware and software components in the transmission channel are more stable and reliable, reducing the risk of data loss or transmission errors due to hardware failures or system errors. Through the above measures, the security problem of interlocking route information transmission is solved.

The interlocking route information sent by the station interlocking equipment to the interlocking route transmission equipment includes station train route and shunting route information, etc.

The main control unit receives the interlocking route information sent by the communication interface unit, performs safety verification, adds the station-related number to the verified interlocking route information to form the interlocking route identification number information, and sends it to the communication interface unit. The main control unit adopts a two-out-of-two safety computer platform to realize functions such as parameter configuration, interlocking route information comparison, information processing, and information transmission.

The parameter configuration function is used to configure the station-related numbers and network IP addresses where the interlocking route transmission equipment is located; the station-related numbers include the regional number, the partition number, the station number and the station serial number; the network IP addresses are uniformly planned by the National Railway Group.

The information comparison function is to implement a two-out-of-two comparison verification of the dual-channel interlocking route information received from the station interlocking equipment. If they are consistent, subsequent information processing is performed; if they are inconsistent, corresponding abnormal processing is performed;

The information processing function is to obtain the interlocking route number from the interlocking route information obtained through information comparison, and add the station-related number to form an interlocking route identification number, including the zone number, partition number, station number, station serial number and interlocking route number. The interlocking route identification number is unique throughout the route and can be used for safety verification of the interlocking route identification number by on-board train control equipment and central train control equipment; the interlocking route number is the code given in the interlocking diagram of the route arranged by the station interlocking equipment, and the route number corresponding to each interlocking route is unique.

The information transmission function is used to communicate with the communication interface unit and the maintenance unit, and to receive and send interlocking route information and related maintenance information.

After the main control unit verifies the security of the received interlocking route information, it directly obtains the interlocking route number, adds the corresponding station-related code, forms the station interlocking route identification number, and sends it to the communication interface unit. This process does not perform logical conversion or mapping processing related to the train control business, and transparently transmits the interlocking route information. The unified and standardized design of interlocking route transmission equipment can be realized, and each device only needs to be configured with necessary parameters, which improves the engineering application applicability of the equipment.

The power supply unit supplies power to each unit of the train control station equipment, and is redundantly configured. A single power supply module does not affect the normal operation of the equipment.

The maintenance unit is connected to the railway signal centralized monitoring data network, establishes communication with the centralized monitoring system, and transmits status information and alarm information of the interlocking route transmission equipment to the centralized monitoring system in real time.

The interlocking route transmission equipment adopts a dual-system structure, and each system (I and II systems) is connected to the operation display machine and the electrical maintenance machine of the station interlocking equipment respectively. A single-system failure does not affect the normal operation of the interlocking route transmission equipment, and can meet the reliability requirements of the train control system. The interface can adopt serial port or Ethernet communication form, as shown in Figure 3(b), which is a schematic diagram of the connection between an interlocking route transmission equipment and an interlocking device in this embodiment.

The interlocking route transmission equipment meets the highest safety integrity level requirements for railway signals.

The conventional railway station interlocking route information transmission control method of the present invention is used to realize the safety verification of the station interlocking route identification number sent by the interlocking route transmission equipment by the on-board train control equipment and the central train control equipment of the conventional railway train control system, so as to ensure the safety and reliability of the transmission of the interlocking route identification number.

As shown in FIG2 , it is a schematic diagram of an interlocking route information transmission process in this embodiment. Compared with the existing conventional railway CTCS-0 level system, the central train control equipment, interlocking route transmission equipment, and related interfaces and transmission networks are added, so that the route information can be automatically transmitted from the station interlocking equipment to the on-board train control equipment through the wireless network.

As shown in FIG. 4 , it is a schematic diagram of a safe transmission and verification process of an interlocking route identification number in this embodiment.

The interlocking route transmission equipment is directly interfaced with the station interlocking equipment operation display machine and the electrical maintenance machine. The interlocking host sends the interlocking route information to the operation display machine and the electrical maintenance machine respectively. The operation display machine and the electrical maintenance machine do not unpack and parse the received interlocking route information, but directly add the necessary safety protection information and then transparently transmit it to the interlocking route transmission equipment. The interlocking route transmission equipment receives the interlocking route information of the two channels, performs a two-by-two comparison, and after the comparison is consistent, obtains the interlocking route number and adds the station-related code to form an interlocking route identification number composed of the zone number, partition number, station number, station serial number and interlocking route number. This identification number is unique throughout the entire railway. The interlocking route transmission equipment sends the interlocking route identification number to the central train control equipment through the railway communication transmission network or the railway signal safety data network.

The central train control equipment pre-configures the interlocking route identification number and its corresponding route identification transponder number within its jurisdiction. The interlocking route identification number is composed of the regional number, the partition number, the station number, the station serial number and the interlocking route number; the route identification transponder is used to identify all interlocking routes corresponding to the same station entrance or departure track of the station (yard), that is, the route identification transponder and the station (yard) related routes are in a one-to-many relationship and are arranged in key positions related to the routes; the route identification transponder number is composed of the regional number, the partition number, the station number and the transponder number. When configuring relevant data, it is necessary to check the regional number, the partition number and the station number in the interlocking route identification and the route identification transponder number to ensure the correctness of the configuration data.

After the central train control device receives the interlocking route identification number from the interlocking route transmission device, it checks it and confirms that it is within the configured interlocking route identification number range, then stores the relevant interlocking route identification number and the corresponding route identification transponder number. If it is not within the configured range, the received information is discarded and corresponding exception processing is performed.

After the station completes the route processing and the train receives the route identification transponder, the corresponding identification transponder number is sent to the central train control device through the wireless network. The central train control device selects the corresponding interlocking route identification number according to the corresponding route identification transponder number and sends it to the on-board train control device. The on-board train control device verifies the received interlocking route identification number. If the zone number, partition number, station number and station serial number are consistent with the relevant information of the station where the train is located, the corresponding route information is used to retrieve the line data to monitor the train operation. If they are inconsistent, the corresponding exception processing is performed; the relevant information of the station where the train is located is the zone number, partition number and station serial number of the station. This information can be written in the route identification transponder, or pre-stored in the line basic data of the on-board train control device.

In this embodiment, the central train control device may optionally pre-configure data including the interlocking route identification number, the corresponding route identification transponder number, and the corresponding track number or branch line number within its jurisdiction. The track number is composed of the region number, the partition number, the station number, the station serial number, and the track number. The branch line number is composed of the region number, the partition number, the station number, the station serial number, and the branch line number. The central train control device selects the corresponding track number or branch line number based on the route identification transponder number received from the on-board train control device and the interlocking route identification number received from the interlocking route transmission device, and sends it to the on-board train control device. The on-board train control device verifies the received track number or branch line number. If the region number, partition number, station number, and station serial number are consistent with the relevant information of the station where the train is located, the corresponding track number or branch line number information is used to retrieve the line data to monitor the train operation. If they are inconsistent, the corresponding exception processing is performed.

It can be seen from the above technical scheme that the interlocking route transmission equipment interfaces with the operation display machine and the electrical maintenance machine of the station interlocking equipment, and does not directly interface with the interlocking host, which can improve the adaptability of the interface transformation of the interlocking equipment of the existing line station; the operation display machine and the electrical maintenance machine of the station interlocking equipment will transparently transmit the interlocking route information received from the interlocking host to the interlocking route transmission equipment. The interlocking route transmission equipment compares and verifies the dual-channel information based on a two-out-of-two safety computer platform, solving the problem of the interlocking route information security interface; the interlocking route transmission equipment obtains the interlocking route number after verifying the received dual-channel information, and outputs it safely after adding the station-related number, without Other train control business logic conversions are directly transparently transmitted to the central train control equipment, which can realize the unified and standardized design of interlocking route transmission equipment. Each device only needs to be configured with parameters such as the relevant station number and network IP address, which improves the applicability of the equipment in engineering applications; the interactive interlocking route identification numbers between the interlocking route transmission equipment, the central train control equipment and the on-board train control equipment can realize the multiple verification of the ground train control equipment information by the on-board train control equipment, further ensuring the security of the interlocking route information transmission; the interlocking route transmission equipment adopts a dual-system structure, and is redundantly connected to the interlocking equipment, railway communication transmission network or railway signal safety data network, which can meet the reliability requirements of the train control system.

The above embodiments are provided to persons familiar with the art to implement or use the present invention. Personnel familiar with the art may make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention, and these modifications or changes all fall within the protection scope of the present invention.

Claims (10)

1. An interlocking route transmission device is miniaturized station-level signal safety equipment arranged at a station, realizes the safe transmission of interlocking route information to vehicle-mounted train control equipment, and comprises a functional unit comprising a communication interface unit, a main control unit, a power supply unit and a maintenance unit,

The communication interface unit is an interface unit of the interlocking route transmission equipment and the station interlocking equipment, the railway communication transmission network or the railway signal safety data network, and is used for receiving the interlocking route information sent by the station interlocking equipment and sending the interlocking route information to the main control unit, and receiving the station interlocking route identification number sent by the main control unit and sending the station interlocking route identification number to the central train control equipment through the railway communication transmission network or the railway signal safety data network;

The main control unit receives the interlocking route information sent by the station interlocking equipment, performs safety verification, adds station related numbers to the verified interlocking route information to form station interlocking route identification number information, and sends the station interlocking route identification number information to the communication interface unit;

The maintenance unit is connected to the railway signal centralized monitoring data network, establishes communication with the centralized monitoring system, and transmits state information and alarm information of the interlocking route transmission equipment to the centralized monitoring system in real time;

the interlocking route transmission equipment adopts a double-system structure, the two systems are respectively connected with an operation indicator and an electric service maintenance machine of the station interlocking equipment, and the normal operation of the interlocking route transmission equipment is not affected by single-system faults.

2. The enhanced train operation monitoring device according to claim 1, wherein the main control unit directly acquires the interlocking route number in the received interlocking route information after the safety verification of the interlocking route information, and adds a corresponding station related code to form the station interlocking route identification number, and sends the station interlocking route identification number to the communication interface unit, and the process does not perform the train control service related logic conversion or mapping processing, so that transparent transmission is realized on the interlocking route information.

3. The enhanced train operation monitoring device according to claim 1, wherein the interlocking route transmission equipment is connected with an operation indicator and an electric service maintenance machine of the station interlocking equipment, and is not directly connected with an interlocking host of the interlocking equipment, namely, the interlocking host is not required to be modified and upgraded, so that the requirement of modification of the existing wire interlocking equipment interface is met.

4. The enhanced train operation monitoring device according to claim 3, wherein the operation indicator and the electrical service maintenance machine receive the interlocking route information sent by the interlocking machine host, and directly and transparently forward and transmit the interlocking route information to the interlocking route transmission equipment through the interface, namely, the route information packet is not subjected to unpacking, analysis and other processes, so that the authenticity of the data is ensured, the data is prevented from being damaged or tampered in the transmission process, and the safety of the function of the interlocking route information transmission channel is improved.

5. The enhanced train operation monitoring device according to claim 4, wherein the two interlocking route information transmission channels of the interlocking host-operation representing machine-interlocking route transmission equipment and the interlocking host-electric service maintenance machine-interlocking route transmission equipment adopt different communication protocols, and have no random failure and system common cause failure.

6. The enhanced train operation monitoring apparatus according to claim 1, wherein the central train control device is an interlocking route transmission device which manages the same number of stations in correspondence with CTC/TDCS dispatch stations; the system acquires train control temporary data from CTC/TDCS equipment, acquires route information from the interlocking route transmission equipment, centrally completes the ground variable control vehicle data control transmission functions of the interlocking route information, train control temporary data and the like, and simultaneously has the communication function with a wireless communication network center interface.

7. The enhanced train operation monitoring device according to claim 6, wherein the central train control equipment controls and manages a plurality of the interlocking route transmission equipment along the line, each interlocking route transmission equipment is connected with one station interlocking equipment, each station interlocking equipment simultaneously controls a plurality of operation routes, namely, each central train control equipment can simultaneously manage a plurality of route information of a plurality of stations, and the central train control ground equipment control function is concentrated to the center through the hierarchical structure design.

8. The enhanced train operation monitoring device according to claim 1, wherein the interlocking route information transmitted from the station interlocking device to the interlocking route transmission device includes station train route and shunting route information.

9. The enhanced train operation monitoring device according to claim 8, wherein the main control unit adopts a two-out-of-two safety computer platform, two-out-of-two comparison verification is realized on the two-channel interlocking route information received from the station interlocking equipment, the comparison is consistent, the subsequent information processing is performed, and the corresponding exception processing is performed if the comparison is inconsistent.

10. The enhanced train operation monitoring device according to claim 1, wherein the station interlocking equipment is equipment for controlling turnout, route and signal machines of a station and realizing interlocking relation between the turnout, route and signal machines, and mainly comprises an operation indicator, an electric service maintenance machine, an interlocking host and an execution indicator, wherein the interlocking host and the interlocking route transmission equipment are safety equipment meeting the requirement of a train control system, and the operation indicator and the electric service maintenance machine are nonfunctional safety requirement equipment.