Train communication method, device and train

Abstract

The present disclosure relates to a communication method, device and train for a train, including: determining the front train as a called train, establishing a first connection with the called train based on a first communication protocol, and sending notification information to the called train according to the first connection; after receiving confirmation information fed back by the called train in response to the notification information, verifying the identity of the called train based on a second communication protocol and a key; when the verification is successful, establishing a second connection with the called train based on the second communication protocol, and sending train safety-related data to the called train according to the second connection. In this way, two different types of communication protocols can be used at the same time to complete vehicle-to-vehicle communication, solve the problem of low efficiency of the master-called switching between trains, ensure that the master-called relationship can be switched in time during vehicle-to-vehicle communication, and also ensure communication security at the same time, thereby achieving safe communication between trains without increasing communication costs.

Description

Technical Field

[0001] The present disclosure relates to the field of trains, and in particular, to a communication method and device for a train, and a train. Background Art

[0002] The inventors have found that the vehicle-to-vehicle communication protocol used by most TACS (Train Autonomous Circumambulate System) currently used in rail transit is the Railway Signal Safety Protocol I (RSSP_I). At the same time, the caller and the called party between trains are determined through ground systems such as ATS (Automatic Train Supervision) / OC (Object controller), and the caller and the called party are notified to modify the corresponding communication configurations respectively. However, the communication based on RSSP_I can only prevent duplication, loss (deletion), insertion, misorder (reordering), wrong code (bad) and delay, and cannot identify the disguised train identity or prevent intrusion. The communication security is poor. In order to improve the communication security between trains, it is necessary to put forward anti-intrusion and anti-disguise requirements for the DCS (Data Communication System) network, and a dedicated encrypted wireless network is required, which leads to the problem of increasing communication costs. In addition, the process of determining the caller and the called party between trains through ground systems such as ATS / OC, and notifying the caller and the called party to modify the corresponding communication configurations respectively is inefficient, which will reduce the autonomy of the train's autonomous operation to a certain extent. Summary of the invention

[0003] The purpose of the present disclosure is to provide a train communication method, device and train, which can use two different types of communication protocols at the same time to complete the communication between trains, ensure that when the communication relationship between trains changes, the caller-called relationship can be switched in time, and can also ensure the security of communication at the same time, thereby realizing safe communication between trains without increasing communication costs.

[0004] In order to achieve the above objectives, in a first aspect, the present disclosure provides a train communication method, the method comprising:

[0005] Configure this train as the calling end train;

[0006] Determine the called end train, where the called end train is the preceding train running on the target line and adjacent to the present train;

[0007] Establishing a first connection with the called train based on a first communication protocol, and sending notification information to the called train, wherein the notification information is used to notify the called train to set itself as the called train;

[0008] After receiving confirmation information fed back by the called train in response to the notification information, verifying the identity of the called train;

[0009] When the identity authentication of the called train is successful, a second connection is established with the called train based on the second communication protocol, and train safety related data is sent to the called train.

[0010] In a second aspect, the present disclosure further provides a communication method for a train, the method comprising:

[0011] Establishing a first connection with a following vehicle in the target route based on a first communication protocol;

[0012] receiving notification information sent by the following vehicle according to the first connection, and setting the vehicle as a called train corresponding to the following vehicle according to the notification information, and determining the following vehicle as a calling train corresponding to the vehicle;

[0013] After the setting of the called train is completed, feedback confirmation information to the calling train;

[0014] Verifying the identity of the calling train;

[0015] When the identity authentication of the calling-end train is successful, a second connection is established with the calling-end train based on the second communication protocol to receive train safety-related data sent by the calling-end train.

[0016] In a third aspect, the present disclosure further provides a communication device for a train, the device comprising:

[0017] a memory having a computer program stored thereon;

[0018] A processor is used to execute the computer program in the memory to implement the steps of the method described in the first aspect above.

[0019] In a fourth aspect, the present disclosure further provides a communication device for a train, the device comprising:

[0020] a memory having a computer program stored thereon;

[0021] A processor is used to execute the computer program in the memory to implement the steps of the method described in the second aspect above.

[0022] The present disclosure also provides a train, comprising the communication device described above.

[0023] Through the above technical solution, two different types of communication protocols can be used simultaneously to complete the communication between trains. The first communication protocol can solve the problem of low efficiency of switching between the caller and the called party between trains, and ensure that when the communication relationship between trains changes, the caller and the called party relationship can be switched in time, and the communication security can also be guaranteed at the same time, thereby realizing safe communication between trains without increasing communication costs.

[0024] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0026] Figure 1 The figure is a flow chart of a train communication method according to an exemplary embodiment of the present disclosure.

[0027] Figure 2 The present invention is a flowchart of a train communication method according to another exemplary embodiment of the present invention.

[0028] Figure 3 The figure is a flow chart of a train communication method according to an exemplary embodiment of the present disclosure.

[0029] Figure 4 The present invention is a flowchart of a train communication method according to another exemplary embodiment of the present invention.

[0030] Figure 5 It is a schematic diagram of an information interaction process between trains according to another exemplary embodiment of the present disclosure.

[0031] Figure 6 It is a structural block diagram of a communication device for rail transit according to an exemplary embodiment of the present disclosure.

[0032] Figure 7 It is a structural block diagram of a communication device for rail transit according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0033] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0034] In the TACS system, the communication between trains is very flexible, and the communication relationship may change and adjust at any time. For example, if the original front car fails and the original rear car adjustment plan chooses to change ends and detour, the communication relationship will change, and the vehicle behind the original rear car may be re-determined as the new front car corresponding to the original rear car. Therefore, in the TACS system, the communication relationship between trains will often change, and the communication relationship between trains often needs to be re-determined. The efficiency of determining the caller-called communication relationship between trains and trains through ground systems such as ATS / OC and notifying both trains to modify the configuration related to the communication relationship is very low. In addition, the communication protocol currently used in the TACS system has poor security. In order to improve the communication security in the TACS system without increasing the communication cost, and to improve the efficiency of determining and modifying the communication relationship between trains, a train communication method is proposed.

[0035] Figure 1 FIG. 1 is a flow chart of a train communication method according to an exemplary embodiment of the present disclosure. Figure 1 As shown, the method includes steps 101 to 104.

[0036] In step 101, the train is configured as a calling end train.

[0037] For each train operating on the track line, the train can be set as the calling train, and this setting can be configured by default when the train is powered on and initialized.

[0038] In step 102, a called train is determined, where the called train is the preceding train running on the target line and adjacent to the present train.

[0039] The target route may be the route where the vehicle is currently located, and the target route may change accordingly depending on the route to which the vehicle is traveling. In the target route, the train that is in front of the vehicle's route and closest to the vehicle may be used as the preceding vehicle on the target route.

[0040] In step 103, a first connection is established with the called train based on a first communication protocol, and notification information is sent to the called train, wherein the notification information is used to notify the called train to set itself as the called train.

[0041] After determining the preceding vehicle relative to this vehicle, the preceding vehicle can be used as the called train. Since each train operating on the track line can configure itself as the calling train during power-on initialization, after using the preceding vehicle as the called train, train-to-train communication can be carried out with the called train as the calling train.

[0042] Furthermore, in order to achieve communication with the called train, it is necessary to notify the called train to set its own configuration to the called train corresponding to the train. The specific contents that need to be set may include, for example, a monitoring data flag and a called flag, etc. By setting the called flag and the monitoring data flag, the called identity of the called train can be represented and some train data can be monitored by the calling train.

[0043] In this embodiment, the first connection can be established with the called end train based on the first communication protocol, and then the notification information is sent to the called end train according to the first connection to notify the called end train to set itself as the called end train corresponding to the train. Among them, the first communication protocol can be any communication protocol that does not need to modify the train configuration according to the difference between the calling end and the called end. For example, it can be the Railway Safety Communication Protocol I (RSSP_I) widely used in the current TACS system. In the communication relationship based on RSSP_I, the communication configurations of the calling end train and the called end train are the same, and the calling and the called can be switched at any time without switching the configuration. Therefore, the communication connection can be made at any time according to the communication relationship between the trains, thereby solving the problem that the communication between trains in the TACS system will switch the communication object at any time and the switching efficiency of the communication relationship cannot be guaranteed. Among them, the first communication protocol does not need to have a high security requirement, and its security can be low. For example, the connection and communication content between trains can be encrypted without encryption, as long as it can be guaranteed to be able to switch to the latest communication relationship at any time after the communication relationship between the trains changes, and establish the relevant communication connection.

[0044] Since the first communication protocol does not require high communication security and only requires the ability to switch communication objects at any time, after establishing the first connection, in order to ensure communication security, train safety-related data related to train safety will not be sent directly through the first connection, but a more secure connection will be further established. Therefore, after establishing the first connection, the notification information is sent to the called train through the first connection so that the called train sets itself as the called train, so that a more secure communication connection can be further established according to the setting. Among them, the specific needs of the called train are determined in response to the settings made by the notification information, and can be determined according to the second communication protocol based on which the second connection is established as needed.

[0045] The second communication protocol can be any communication protocol that encrypts the establishment of communication relations and the content of communication, thereby ensuring the transmission security of train safety-related data and playing a role in preventing intrusion and camouflage. For example, the second communication protocol can be the Railway Safety Communication Protocol II (RSSP_II), which specifies the signal safety equipment through an open transmission system in detail, and the secure communication interface between railway signal safety equipment adopts a hierarchical structure. On the basis of the TCP / IP five-layer model, the adaptation and redundancy management layer, the message authentication security layer and the security application intermediate sublayer are added to form a special RSSP_II communication model. The open network is defined in the secure communication and secure communication standard EN50159-2 as: "A transmission system with an unknown number of connected devices, which has unknown, variable and untrusted characteristics and is used for unknown communication services. Unauthorized access should be evaluated for this system." According to the EN50159-2 standard, for an open transmission system, all possible threats include duplication, deletion, insertion, reordering, damage, delay, and camouflage. RSSP_II can identify and prevent all the above threat sources. The data receiving end performs security checks on the received data and guides the data to safe processing after errors. Therefore, the communication security based on this communication protocol can be guaranteed to a certain extent.

[0046] After the communication configuration of the called train in the current communication relationship is set up through the first connection preliminarily established based on the first communication protocol, a more secure communication connection can be further established based on the second communication protocol to transmit train safety-related data.

[0047] In step 104, after receiving confirmation information fed back by the called train in response to the notification information, the identity of the called train is verified.

[0048] The confirmation information fed back in response to the notification system information can be used to indicate that the configuration settings of the called train are completed. When the confirmation information is received, it indicates that the called train can further establish a more secure communication connection.

[0049] In the process of further establishing a more secure communication connection based on the second communication protocol to transmit train safety-related data, in order to ensure the further security of the communication connection established based on the second communication protocol, it is necessary to verify the identity of the called train. Among them, the verification method can include multiple methods, and different identity authentication methods can be selected according to the second communication protocol. For example, the verification method can be a key-based verification. The second communication protocol and the first communication protocol are both pre-configured in each train, and the key is also configured with the configuration information in each train when configuring the second communication protocol, which is used to perform key verification on the communication object when establishing a communication connection based on the second communication protocol to determine the identity of the communication object, so as to prevent intrusion and camouflage.

[0050] In step 105, when the identity authentication of the called train is successful, a second connection is established with the called train based on the second communication protocol, and train safety related data is sent to the called train.

[0051] If the identity authentication of the called train is successful, the second connection can be successfully established, and then communication can be carried out with the called train through the second connection according to the second communication protocol, that is, the train safety-related data is sent. The train safety-related data includes the train identification number, train driving mode, train speed and train safety envelope, etc. The train safety-related data can be used for calculations such as safety tracking between any trains.

[0052] Through the above technical solution, two different types of communication protocols can be used simultaneously to complete the communication between trains. The first communication protocol can solve the problem of low efficiency of switching between the caller and the called party between trains, and ensure that when the communication relationship between trains changes, the caller and the called party relationship can be switched in time, and the communication security can also be guaranteed at the same time, thereby realizing safe communication between trains without increasing communication costs.

[0053] In a possible implementation, in the process of determining the called train, the train identification number of the called train can also be obtained to establish the first connection and the second connection. Alternatively, the first connection and the second connection can also be established by obtaining train information such as ETCSID (train control system ID), IP address and port corresponding to the train. As long as it can represent the information related to the communication with the preceding train, it is feasible. The specific method of establishing the first connection and the second connection through the train identification number can include: searching the communication equipment on the called train according to the train identification number of the called train in a pre-configured list to establish a first connection with the communication equipment on the called train based on the first communication protocol; or searching the communication equipment on the called train according to the train identification number of the called train in a pre-configured class table to establish a second connection with the communication equipment on the called train based on the second communication protocol. The pre-configured list can be a communication equipment list configured before the train is powered on and initialized. That is, all trains on the target line except the train can be pre-configured in the communication equipment list corresponding to the first communication protocol and the call list corresponding to the second communication protocol. The train identification number is then routed to the corresponding communication device to establish a connection. The communication device information in the same train stored in the call list and the communication device list corresponding to the second communication protocol and the first communication protocol respectively may be the same or different, that is, different communication devices may be set based on different communication protocols in the same train to establish different connections with other trains.

[0054] In a possible implementation, the method for determining the called train may be as follows: obtaining the train position status on the target line through a preset ground device; determining the train located in front of the vehicle in the direction of travel and closest to the vehicle as the leading vehicle according to the train position status, and determining the leading vehicle as the called train. The train position status may be obtained through preset ground equipment, such as ground systems such as ATS / OC. Alternatively, it may be obtained through other equipment arranged in the train or on the ground. In the present disclosure, the method for obtaining the train position status and the device for obtaining the train position status are not limited, and the preset ground equipment is only an example. The train position status may include the position status of all trains on the target line, or it may be the position status of trains on the target line within a certain range from the vehicle, and so on.

[0055] Figure 2 A rail transit communication method is shown according to another exemplary embodiment of the present disclosure. Figure 2 As shown, the method further includes step 201 and step 202.

[0056] In step 201, train safety related data sent by the called train is received.

[0057] In step 202, the called train is tracked according to the train safety related data sent by the called train, and the safety margin between the own train and the called train is calculated.

[0058] That is, after receiving the train safety-related data sent by this train, the called train will also feed back its own train safety-related data to this train, so that this train can track the called train according to the train safety-related data of the called train, calculate the safety margin between this train and the called train according to the speed and safety envelope of the called train, and combine the safety braking model to perform calculations for autonomous train operation.

[0059] In a possible implementation, Figure 2 As shown, the method further includes step 203 and step 204.

[0060] In step 203, the called train is determined according to a preset period;

[0061] In step 204, if the called train determined in the current cycle is different from the called train determined in the previous cycle, and the first connection and / or the second connection has been established with the called train determined in the previous cycle, all communication connections with the called train determined in the previous cycle are disconnected.

[0062] That is, as the running status and position of the calling and called trains change, if the preceding vehicle determined by the calling train in a certain period changes and is no longer the previously determined called train, the preceding vehicle determined in the period will be used as the called train and before a new connection is established with the replaced called train, the connection with the called train before the replacement will be disconnected. Moreover, no matter what connection status the vehicle is in with the called train, for example, only the first connection is established, or both the first connection and the second connection are established, all communication connections with the called train will be directly interrupted, and the new preceding vehicle will be used to determine the new called train to re-establish the first connection and the second connection. Among them, in the case where the called train has modified its own communication settings to the called settings according to the notification information, the called vehicle can be re-notified to restore to the previous settings when the connection is disconnected.

[0063] In a possible implementation manner, the notification information includes the train identification number of the vehicle to indicate the identity of the vehicle, thereby facilitating communication between the called train and the vehicle.

[0064] In a possible implementation, the first communication protocol is Railway Safety Communication Protocol I, and the second communication protocol is Railway Safety Communication Protocol II.

[0065] Figure 3 FIG. 1 is a flow chart of a train communication method according to an exemplary embodiment of the present disclosure. Figure 3 As shown, the method includes steps 301 to 305.

[0066] In step 301, a first connection is established with a following vehicle in a target route based on a first communication protocol.

[0067] In step 302, the notification information sent by the following vehicle is received according to the first connection, and according to the notification information, the vehicle is set as the called train corresponding to the following vehicle, and the following vehicle is determined as the calling train corresponding to the vehicle.

[0068] In step 303, after the setting of the called train is completed, confirmation information is fed back to the calling train.

[0069] In step 304, the identity of the calling train is verified.

[0070] In step 305, when the identity authentication of the calling train is successful, a second connection is established with the calling train based on the second communication protocol and the key, and train safety-related data sent by the calling train is received according to the second connection.

[0071] That is, the train in the target line can not only serve as a calling end train and establish a communication connection with the front train as a called end train to realize autonomous train operation, but also respond to the signal of the rear train to serve as the called end of the rear train and communicate with the rear train. The calling end train is the same as the calling end train in the above communication method, and the connection mode and communication mode between the calling end and the called end are also consistent with those shown in the above communication method, and the first communication protocol and the second communication protocol are also the same protocol.

[0072] In a possible implementation, the calling end train and the called end train may be the same train, that is, the train in the target line may have a default initialized calling end setting, or may be set as the called end corresponding to the following train in response to the notification information of the following train. The same train may simultaneously serve as the calling end of the leading train and the called end of the following train to establish a communication connection with the two trains for communication.

[0073] Through the above technical solution, two different types of communication protocols can be used simultaneously to complete the communication between trains. The first communication protocol can solve the problem of low efficiency of switching between the caller and the called party between trains, and ensure that when the communication relationship between trains changes, the caller and the called party relationship can be switched in time, and the communication security can also be guaranteed at the same time, thereby realizing safe communication between trains without increasing communication costs.

[0074] Figure 4 FIG. 1 is a flow chart of a rail transit communication method according to another exemplary embodiment of the present disclosure. Figure 4 As shown, the method further includes step 401.

[0075] In step 401, after receiving the train safety-related data sent by the calling train, the train safety-related data of the vehicle is sent to the calling train, wherein the train safety-related data includes a train identification number, a train driving mode, a train speed and a train safety envelope.

[0076] In a possible implementation, the first communication protocol is Railway Safety Communication Protocol I, and the second communication protocol is Railway Safety Communication Protocol II.

[0077] The following is a specific example of establishing a communication relationship and performing communication between multiple trains in a target line.

[0078] like Figure 5 As shown, in the target route of train 1, train 2 is the preceding train of train 1. After train 1 obtains the information of train 2, the information interaction process between train 1 and train 2 can be as follows:

[0079] 1. Train 1 establishes a first connection with Train 2; if the connection establishment fails, you can continue to try to establish the first connection within the time threshold

[0080] 2. When the first connection is successfully established, train 1 sends a notification message to train 2;

[0081] 3. Train 2 responds to the notification information and sets itself as the called train corresponding to Train 1;

[0082] 4. After the setting is completed, Train 2 feeds back confirmation information to Train 1;

[0083] 5. After receiving the confirmation information, the train 1 verifies whether the identity of the train 2 is safe based on the second communication protocol and the corresponding key before establishing the second connection; if the train 1 has not received the confirmation information, it can continue to wait for receiving the confirmation information, or repeatedly send the notification information. If the time threshold is exceeded, the called end determination step can be repeated, that is, the aforementioned steps 1-3 can be re-executed;

[0084] 6. If the identity verification of train 2 is successful, establish a second connection with train 2 based on the second communication protocol; if the identity verification of train 2 is unsuccessful, continue to attempt to verify the identity of train 2 within the time threshold;

[0085] 7. After the second connection is successfully established, train 1 sends its own train safety-related data to train 2;

[0086] 8. After receiving the train safety related data sent by train 1, train 2 also returns its own train safety related data to train 1.

[0087] Figure 6 FIG. 1 is a structural block diagram of a rail transit communication device according to an exemplary embodiment of the present disclosure. Figure 6 As shown, the communication device 600 may include: a processor 601 and a memory 602. The communication device 600 may also include one or more of a multimedia component 603, an input / output (I / O) interface 604, and a communication component 605.

[0088] The processor 601 is used to control the overall operation of the communication device 600 to complete all or part of the steps in the above-mentioned train communication method. The memory 602 is used to store various types of data to support the operation of the communication device 600. For example, these data may include instructions for any application or method used to operate on the communication device 600, and application-related data, such as communication device list data, call list data, sent and received messages, pictures, audio, video, etc. The memory 602 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (Static Random Access Memory, referred to as SRAM), electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, referred to as EEPROM), erasable programmable read-only memory (Erasable Programmable Read-Only Memory, referred to as EPROM), programmable read-only memory (Programmable Read-Only Memory, referred to as PROM), read-only memory (Read-Only Memory, referred to as ROM), magnetic memory, flash memory, magnetic disk or optical disk. The multimedia component 603 may include a screen and an audio component. The screen may be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may be further stored in the memory 602 or sent through the communication component 605. The audio component also includes at least one speaker for outputting audio signals. The I / O interface 604 provides an interface between the processor 601 and other interface modules, and the other interface modules may be keyboards, mice, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 605 is used for wired or wireless communication between the communication device 600 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or a combination of one or more of them, is not limited here. Therefore, the corresponding communication component 605 may include: Wi-Fi module, Bluetooth module, NFC module, etc.

[0089] In an exemplary embodiment, the communication device 600 can be implemented by one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), controllers, microcontrollers, microprocessors or other electronic components to execute the above-mentioned train communication method.

[0090] Figure 7 is a block diagram of a communication device 700 for a train according to an exemplary embodiment. For example, the communication device 700 may be provided as a server. Figure 7 The communication device 700 includes a processor 722, which may be one or more, and a memory 732 for storing a computer program executable by the processor 722. The computer program stored in the memory 732 may include one or more modules each corresponding to a set of instructions. In addition, the processor 722 may be configured to execute the computer program to perform the above-mentioned train communication method.

[0091] In addition, the communication device 700 may further include a power supply component 726 and a communication component 750, wherein the power supply component 726 may be configured to perform power management of the communication device 700, and the communication component 750 may be configured to implement communication, such as wired or wireless communication, of the communication device 700. In addition, the communication device 700 may further include an input / output (I / O) interface 758. The communication device 700 may operate based on an operating system stored in the memory 732, such as Windows Server™, Mac OSX™, Unix™, Linux™, etc.

[0092] A train comprises the communication device mentioned above.

[0093] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0094] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0095] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A train communication method, characterized in that: The method comprises: Configure this train as the calling end train; Determine a called train, where the called train is a preceding train running on a target line and adjacent to the present train; Establishing a first connection with the called train based on a first communication protocol, and sending notification information to the called train, wherein the notification information is used to notify the called train to set itself as the called train, and the first communication protocol is the Railway Safety Communication Protocol I; After receiving confirmation information fed back by the called train in response to the notification information, verifying the identity of the called train; When the identity authentication of the called train is successful, a second connection is established with the called train based on a second communication protocol, and train safety related data is sent to the called train, where the second communication protocol is Railway Safety Communication Protocol II.

2. The method according to claim 1, characterized in that Before establishing the first connection with the called train based on the first communication protocol, the method further includes: configuring all trains on the target line except the train itself in a communication device list corresponding to the first communication protocol; and All trains on the target line except the train itself are configured in a call list corresponding to the second communication protocol.

3. The method according to claim 1, characterized in that Determining the called train includes: Acquiring the train position status on the target line through a preset ground device; According to the train position status, the train located in front of the vehicle in the driving direction and closest to the vehicle is determined as the leading vehicle, and the leading vehicle is determined as the called train.

4. The method according to claim 1, characterized in that: Determining the called train includes: Determining the called train according to a preset period; The method further comprises: If the called train determined in the current cycle is different from the called train determined in the previous cycle, and the first connection and / or the second connection has been established with the called train determined in the previous cycle, all communication connections with the called train determined in the previous cycle are disconnected.

5. The method according to claim 1, characterized in that Determining the called train includes: Determine the train identification number of the called train.

6. The method according to claim 1, characterized in that The method further comprises: Receiving train safety related data sent by the called train; The called train is tracked according to the train safety related data sent by the called train, and the safety margin between the own train and the called train is calculated.

7. The method according to claim 1, characterized in that The verification of the identity of the called train includes: The identity of the called train is verified based on the second communication protocol and the key.

8. The method according to claim 1, characterized in that The notification information includes the train identification number of the vehicle.

9. The method according to claim 1, characterized in that: The train safety related data includes train identification number, train driving mode, train speed and train safety envelope.

10. A train communication method, characterized in that: The method comprises: Establishing a first connection with a following vehicle in the target line based on a first communication protocol, wherein the first communication protocol is a railway safety communication protocol I; receiving notification information sent by the following vehicle according to the first connection, and setting the vehicle as a called train corresponding to the following vehicle according to the notification information, and determining the following vehicle as a calling train corresponding to the vehicle; After the setting of the called train is completed, feedback confirmation information to the calling train; Verifying the identity of the calling train; When the identity authentication of the calling train is successful, a second connection is established with the calling train based on a second communication protocol, and train safety-related data sent by the calling train is received according to the second connection, and the second communication protocol is the Railway Safety Communication Protocol II.

11. The method according to claim 10, characterized in that The method further comprises: After receiving the train safety related data sent by the calling end train, sending the train safety related data of the own train to the calling end train; The train safety related data includes train identification number, train driving mode, train speed and train safety envelope.

12. A communication device for a train, characterized in that: The device comprises: a memory having a computer program stored thereon; A processor, configured to execute the computer program in the memory to implement the steps of the method according to any one of claims 1 to 9.

13. A communication device for a train, characterized in that: The device comprises: a memory having a computer program stored thereon; A processor, configured to execute the computer program in the memory to implement the steps of the method according to any one of claims 10 to 11.

14. A train, characterized in that: Includes the communication device described in claim 12 and / or claim 13.

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