WO2023097821A1

WO2023097821A1 - Virtual coupling network system for trains

Info

Publication number: WO2023097821A1
Application number: PCT/CN2021/140804
Authority: WO
Inventors: 曹春伟; 刘鸿宇; 王洋; 王大海; 赵中强; 张天
Original assignee: 中车唐山机车车辆有限公司
Priority date: 2021-12-03
Filing date: 2021-12-23
Publication date: 2023-06-08
Also published as: CN114162174B; CN114162174A

Abstract

Provided in the present application is a virtual coupling network system for trains. The system comprises a control center and a plurality of groups of trains for coupling, wherein two ends of each train are each provided with an RFID transponder, and each train is internally provided with a vehicle-mounted apparatus of a train-ground communication system, one RFID reader, one WLTBN and one UE; the control center generates coupling information and sends the coupling information to each train; the UE of each train receives the coupling information; the UE of each train performs train discovery according to the coupling information, and establishes train backbone network communication; the UE of the train which establishes the train backbone network communication generates a white list; the UE of the train which establishes the train backbone network communication determines a main role of the WLTBN according to the white list; and when the WLTBN in an activated state is not the main role, the UE of the train where the WTBN in the activated state is located controls the WLTBN of the train to be in a backup state; moreover, the UE of the train where the main role is located controls the WLTBN of the train to be in the activated state.

Description

A train virtual marshalling network system

technical field

The present application relates to the technical field of rail transit, in particular to a network system for train virtual marshalling.

Background technique

With the rapid development of the smart rail transit industry, train virtual marshalling technology has become the main marshalling technology for target train operation. This technology enables the following vehicle to obtain the running status of the preceding vehicle to control the operation of the following vehicle through direct wireless communication between vehicles, so as to realize the coordinated operation of multiple trains at the same speed and with a very small interval through wireless communication. In this way, the trains running synchronously at a certain distance can be regarded as being coupled, and compared with the traditional method, the traditional physical coupling is changed into a wireless communication coupling.

In the virtual train marshalling technology, the realization of the train virtual marshalling network system is more important.

Contents of the invention

In order to solve the above-mentioned technical problems, the present application provides a train virtual formation network system.

The first aspect of the present application provides a train virtual marshalling network system. The system includes: a control center and multiple groups of trains for marshalling; each group of trains is equipped with a radio frequency identification (RFID) transponder at both ends; each group of trains The on-board device of the train-ground communication system, an RFID reader, a wireless train backbone network node device WLTBN and a backbone network user access device UE are all installed inside;

The control center generates grouping information according to the information of the multiple groups of trains;

The control center sends the composition information to the multiple groups of trains;

The UEs of each group of trains receive the grouping information through the on-board device of the vehicle-ground communication system or the RFID reader;

The UEs of each group of trains discover the trains through RFID readers and RFID transponders according to the marshalling information, and establish train backbone network communication; among the trains establishing train backbone network communication, there is only one group of trains whose WLTBN is in an active state ;

Create a whitelist for the UE of the train that establishes the train backbone network communication;

The UE of the train establishing the train backbone network communication determines the main role of the WLTBN according to the white list;

When the active WLTBN is not in the master role, the UE on the train where the active WLTBN is located controls its WLTBN to be in the backup state, and at the same time, the UE on the train where the master role is located controls its WLTBN to be in the active state.

The application provides a train virtual marshalling network system, which includes: a control center and multiple trains for marshalling; an RFID transponder is installed at both ends of the train, and an on-board device of the train-ground communication system and an RFID reader are installed inside. , one WLTBN and one UE; the control center generates marshalling information and sends the marshalling information to the train; the UE of the train receives the marshalling information; the UE of the train discovers the train according to the marshalling information, establishes the train backbone network communication; establishes the train backbone network communication The UE of the train generating the white list; the UE of the train establishing train backbone network communication determines the main role of the WLTBN according to the white list; when the activated WLTBN is not the main role, the UE of the train where the activated WLTBN is At the same time, the UE of the train where the main character is located controls its WLTBN to be in the active state, realizing the establishment of a train virtual marshalling network system.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the application and constitute a part of the application. The schematic embodiments of the application and their descriptions are used to explain the application and do not constitute improper limitations to the application. In the attached picture:

Fig. 1 is a schematic structural diagram of a train virtual marshalling network system provided by an embodiment of the present application;

Fig. 2 is a schematic structural diagram of a train provided in an embodiment of the present application.

Detailed ways

In order to make the technical solutions and advantages in the embodiments of the present application clearer, the exemplary embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are only part of the embodiments of the present application, and Not an exhaustive list of all embodiments. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

In the process of realizing the present application, the inventor found that with the rapid development of the smart rail transit industry, the train virtual marshalling technology has become the main marshalling technology for the target train operation. This technology enables the following vehicle to obtain the running status of the preceding vehicle to control the operation of the following vehicle through direct wireless communication between vehicles, so as to realize the coordinated operation of multiple trains at the same speed and with a very small interval through wireless communication. In this way, the trains running synchronously at a certain distance can be regarded as being coupled, and compared with the traditional method, the traditional physical coupling is changed into a wireless communication coupling. In the virtual train marshalling technology, the realization of the train virtual marshalling network system is more important.

In view of the above problems, the embodiment of the present application provides a train virtual marshalling network system, the system includes: a control center and multiple trains for marshalling; an RFID transponder is set at both ends of the train, and a train-ground communication system is set inside On-board device, one RFID reader, one WLTBN and one UE; the control center generates marshalling information, and sends the marshalling information to the train; the UE of the train receives the marshalling information; the UE of the train discovers the train according to the marshalling information, and establishes the train backbone Network communication; the UE of the train that establishes the train backbone network communication generates a white list; the UE of the train establishing the train backbone network communication determines the main role of the WLTBN according to the white list; when the active WLTBN is not the main role, the active WLTBN The UE of the train controls its WLTBN to be in the backup state, and at the same time, the UE of the train where the master role is located controls its WLTBN to be in the active state, realizing the establishment of a train virtual marshalling network system.

Referring to FIG. 1 , the train virtual marshalling network system provided by this embodiment includes: a control center and multiple groups of trains for marshalling.

Wherein, the control center is used to generate formation information according to the information of multiple sets of trains, and send the formation information to multiple sets of trains. At the same time, when multiple groups of trains establish train backbone network communication, the control center is used to synchronize information with the trains.

Multiple groups of trains are used to establish the train backbone network communication according to the formation information sent by the control center, and then complete the virtual formation of trains.

In addition, a radio frequency identification RFID transponder is respectively installed at both ends of each group of trains. Each group of trains is equipped with an on-board device of the train-ground communication system, an RFID reader, a wireless train backbone network node device WLTBN and a backbone network user access device UE.

For example, in the train shown in Figure 2, 1 and 2 are RFID transponders installed at both ends of the train, WLTBN is the wireless train backbone network node device, UE is the backbone network user access device, and ED is the RFID reader.

The process of virtual marshalling performed by the train virtual marshalling network system provided by this embodiment will be described in detail below.

101. The control center generates composition information according to the information of multiple groups of trains.

Wherein, the formation information includes the ID (identification), direction and number of carriages of each train.

When trains need to be organized, the control center will determine the trains to be organized.

Among them, there are many situations where trains need to be marshalled, for example:

1. Two sets of trains on different lines meet at a turnout

In this case, the control center will determine that the two groups of trains are the trains for marshalling.

In specific implementation, 1) the group of trains that first obtains the control right of the turnout is the front vehicle, and passes through the turnout with priority; Establish train backbone network communication between them, and establish virtual marshalling; 3) The front car passes the turnout according to the single-vehicle crossing mode; 4) The rear car passes the turnout according to the command of the front car.

2. Two groups of trains on the same line meet at the turnout

During specific implementation, 1) the rear car catches up with the front car, establishes the train backbone network communication between the two groups of trains by the method provided by the application, and establishes a virtual formation;

In addition to the above two situations, it is also necessary to establish train backbone network communication through the method provided by this application at different stages, and then perform marshalling. For example:

1. The car behind catches up with the car in front

In view of this situation, the control center will determine that the two groups of trains before and after are the trains for marshalling.

In the specific implementation, the following train chases the preceding train, and the method provided by this application establishes the train backbone network communication between the two groups of trains, establishes a virtual marshalling process, and then marshals the trains to achieve a stable target interval.

In the process of the following vehicle chasing the preceding vehicle, the goal of interval control can also be achieved by controlling the train to be at a certain interval during operation and adopting the corresponding operating speed.

Marshalling cooperative control adjusts the target interval according to the different working conditions of the two vehicles. The train runs with the acceleration a _up and the maximum deceleration a _down during the speed change process. At the same time, the rate of change of acceleration (jerk) should not affect the comfort of passengers. These values are determined according to the operating characteristics of the train.

According to the status of the front and rear vehicles when they are marshalling, the working conditions are divided into the following 9 types:

1) The vehicle in front runs at a constant speed

The front vehicle runs at a constant speed of V1, and the rear vehicle runs at a constant speed of V2, V2>V1. Through the method provided by this application, the train backbone network communication is established between the two groups of trains. When establishing a virtual formation, the front car obtains the position of the rear car through inter-vehicle communication, and calculates the distance between the front and rear trains based on the position of the own train.

The scene decomposition of the front vehicle running at a constant speed is shown in Table 1:

Table 1

序号serial number	编组时刻后车状态The state of the rear vehicle at the time of marshalling	编组后前车控制后车行为After marshalling, the front vehicle controls the behavior of the rear vehicle
11	匀速uniform speed	匀速->减速运行Uniform speed -> deceleration operation
22	加速accelerate	加速->减速运行Acceleration -> deceleration run
33	减速slow down	减速到V1->匀速运行Decelerate to V1 -> run at a constant speed

2) The vehicle in front accelerates evenly

The front vehicle runs at a uniform speed of V1, and the rear vehicle runs at a speed of V2, V2>V1. Through the method provided by this application, the train backbone network communication is established between the two groups of trains. When establishing a virtual formation, the front car obtains the position of the rear car through inter-vehicle communication, and calculates the distance between the front and rear trains based on the position of the own train.

Table 2 shows the decomposition of the running scene of the vehicle in front at uniform acceleration:

Table 2

3) The vehicle in front runs at a uniform deceleration

The vehicle in front begins to run at a uniform deceleration at speed V1, and the vehicle behind runs at speed V2, V2>V1. Through the method provided by this application, the train backbone network communication is established between the two groups of trains. When establishing a virtual formation, the front car obtains the position of the rear car through inter-vehicle communication, and calculates the distance between the front and rear trains based on the position of the own train.

The scene decomposition of the vehicle in front with uniform deceleration is shown in Table 3:

table 3

in,

LB1 is the deceleration distance. After the front and rear vehicles reach the deceleration distance, the rear vehicle must decelerate;

2. Interval control process

Through the method provided by this application, the train backbone network communication is established between the two groups of trains. At the first moment after the establishment of the virtual formation, the rear train sends its own traction braking force information to the front train, and the traction force exerted by the front train and the rear train is controlled. Based on the power, calculate the force at the next moment.

U is the output traction force, and U _last is the traction force calculated last time.

For the next calculated value, calculate the speed-distance curve of the rear car under nine working conditions according to the front car, obtain the location information of the rear car through inter-train communication, and calculate the relative distance between the two trains; when the front car stably receives the rear car After using the signal sent by the precise positioning method, the preceding vehicle will first use the precise positioning method, and redundantly use the train positioning to calculate the distance between the two vehicles to obtain the distance between the two vehicles; the leading vehicle collects the train speed information in real time, and calculates the speed deviation according to the distance between the two vehicles ;According to the speed deviation, consider the train speed limit, acceleration limit, and jerk limit value to calculate the traction/braking force F to be applied; the front car sends the traction/braking force to be applied to the rear car wireless formation control through the wireless formation control unit Unit, the wireless marshalling control unit of the rear car forwards to the CCU; the CCU of the rear car sends a request value to the traction system or braking system of the train to apply traction to accelerate the train to the control speed, or apply braking force to decelerate the train to a specified value.

The vehicle in front calculates the speed-distance curve at regular intervals (5s), and corrects the running deviation.

102. The control center sends formation information to multiple sets of trains.

Specifically, the control center sends formation information to multiple groups of trains through the vehicle-ground communication system. Alternatively, the control center sends formation information to multiple sets of trains through RFID transponders located at fixed locations on the track.

For example, for each train that the control center determines to be formed and run, the train ID, direction, and number of cars that need to be formed form a message, that is, the formation input information is transmitted to the formation through LTE wireless communication; at the same time, the control center writes the information to the track Fixed position RFID transponder.

103. The UEs of each group of trains receive formation information through an on-vehicle device or an RFID reader of the train-to-ground communication system.

For any set of trains,

The UEs of any group of trains receive formation information through the on-board device of the vehicle-ground communication system of any group of trains. Or, UEs of any group of trains receive composition information from RFID transponders located at fixed positions on the track through RFID readers of any group of trains.

In addition, after the UEs of each group of trains receive the formation information through the on-board device of the vehicle-ground communication system or the RFID reader, the UEs of each group of trains will also store the formation information in their respective WLTBNs

For the convenience of description, this embodiment takes any group of trains as train A as an example for description.

For example, the UE of train A obtains the formation information sent by the control center through the on-vehicle device of the train's train-to-ground communication system. Alternatively, the UE of train A obtains the formation information sent by the control center from the RFID transponder at a fixed position on the track through the RFID reader of the train.

In addition, after the train A acquires the formation information sent by the control center, the UE of the train A will also store the formation information in the WLTBN of the train.

It should be noted that train A is a separate group of trains for which no train backbone network communication has been established.

104. The UEs of each group of trains discover the trains through the RFID reader and the RFID transponder according to the formation information, and establish the train backbone network communication.

Among the trains establishing the train backbone network communication, only the WLTBN of the only group of trains is active.

Specifically, for any set of trains,

UEs of any group of trains obtain responses from other RFID transponders through their RFID readers.

If the response is obtained, the UE of any group of trains determines whether there is an identifier of the second train in the formation information. Wherein, the second train is the train where the responding RFID transponder is located.

If so, the UE of any group of trains determines to discover the trains in the consist.

The UEs of any group of trains exchange communication signals with the UEs of the second train to establish train backbone network communication.

If the UE of the second train only establishes a train backbone network communication connection with the UEs of any group of trains, the UE of the first small-identified train controls its WLTBN to be in an active state, wherein the first small-identified train is the second train with any Identify the smaller train in the group of trains.

If the UE of the second train establishes a train backbone network communication connection with the UEs of multiple groups of trains, the UE of the second small-identified train controls its WLTBN to be in an active state. Wherein, the train with the second small mark is all the trains with the train backbone network communication connection established by the second train and the train with the small mark in the second train.

Still taking any group of trains as train A as an example,

1. The UE of train A obtains responses from other RFID transponders through its RFID reader.

2. If the response from the RFID transponder of the second train (such as train B) is obtained, the UE of train A determines whether there is an identifier of train B in the formation information.

3. If there is, the UE of train A determines to find the train in the formation, and continues to perform the subsequent steps. If it does not exist, the UE of train A determines that no train in the formation has been found, and re-executes the step of the UE of train A obtaining responses from other RFID transponders through its RFID reader, and continues to find the train.

4. The UE of train A exchanges communication signals with the UE of train B to establish train backbone network communication.

5. Perform initial activation of WLTBN

specific,

If the UE of train B only establishes a train backbone network communication connection with the UE of train A (that is, train B and train A have not established train backbone network communication, and they are two separate trains), then the UE of the first small-identified train controls its WLTBN is active.

Wherein, the train with the first small mark is the train with the small mark among train B and train A.

If the UE of train B establishes a train backbone network communication connection with UEs of multiple groups of trains (that is, train A has established train backbone network communication, it is a separate train, but train B has established train backbone network communication, and train B is an established train backbone network In a group of trains located at the end of a group train for network communication), the UE of the train with the second small ID controls its WLTBN to be in an active state.

Wherein, the train with the second small mark is all the trains with the train backbone network communication connection established by train B and the train with small mark in train A.

That is to say, during the initial activation process, no matter how many groups of trains there are after the train backbone network communication is established, the WLTBN of the group with the smallest identification will always be in the activated state.

However, in the train backbone network communication established by the method provided in the present application, only the WLTBNs of one group of trains are active. And for the situation that the other trains found are the trains located at the end of the formed trains that have established the train backbone network communication, because the formed trains that have established the train backbone network communication are establishing the train backbone network through the method provided by the application During communication, the activated WLTBN (that is, the WLTBN corresponding to the train with the smallest identifier) has been determined during the initial activation process. If train A has a smaller identifier after joining train A, then the activated WLTBN needs to be changed to a backup state. That is, the UE of train A sends a request to the UE of the train corresponding to the smallest identifier, and the request is used to instruct the UE of the train corresponding to the smallest identifier to control its WLTBN to be in the backup state.

specific,

After the UE of the train with the second small ID controls its WLTBN to be in the activated state, it will also determine whether there are two groups of trains whose WLTBNs are in the activated state among all the trains currently establishing the train backbone network communication connection. If the WLTBNs of two sets of trains are in the active state among all the trains currently establishing the train backbone network communication connection, the UE controller WLTBN of the third train is in the backup state.

Wherein, the WLTBN of the third train is in an activated state, and the third train is not the train with the second small identifier.

That is to say, if there are two groups of trains whose WLTBN is in the activated state among all the trains currently establishing the train backbone network communication connection, then the two groups of trains with the WLTBN in the activated state are respectively the train with the second small mark and the third train. At this time, It is necessary to change the state of the third train WLTBN from the active state to the backup state.

Specifically, the UE controller WLTBN of the third train is in the backup state and the implementation process is as follows:

The UE of the second small-identified train sends a request to the UE of the third train.

After receiving the request, the UE of the third train controls its WLTBN to be in the backup state.

In addition, after the UE of train A controls the WLTBN of train A to be in the activated state, record the identifier of the activated WLTBN.

After the initial activation of WLTBN, the activated WLTBN identification will also be synchronized to all trains establishing train backbone network communication.

The activated WLTBN logo synchronization process is as follows:

The fourth train sends the identification of its WLTBN to the control center through the on-board device of its train-to-ground communication system.

Wherein, the fourth train is a train whose WLTBN is activated in the train backbone network communication. That is the above-mentioned two small logo trains.

The control center writes the identification of WLTBN into the RFID transponder located at a fixed position on the track.

In the train backbone network communication, all trains receive the WLTBN identification from the RFID transponder located at a fixed position on the track through their own RFID readers.

Taking the fourth train as train A as an example,

1) The UE of train A sends the WLTBN identifier of train A to the control center through the vehicle-ground communication system of the train to instruct the control center to synchronize the WLTBN identifier of train A.

2) The control center obtains the WLTBN identification of the marshalling train (that is, the WLTBN identification of train A) that has established the train backbone network communication, and synchronizes the WLTBN identification to each train through the RFID transponder located at a fixed position on the track.

3) The UEs of all trains (including train A) that establish train backbone network communication receive the WLTBN identity synchronized by the control center (that is, the WLTBN identity of train A) from the RFID transponder at a fixed position on the track through the RFID reader of the train.

If the train other than train A receives the WLTBN identifier, then the identifier is a new WLTBN identifier, and the new WLTBN identifier is recorded. That is, the new WLTBN identification is not the WLTBN identification received from the train itself.

If train A receives the WLTBN identity, since the received WLTBN identity is the WLTBN identity of train A, at this time, the identity is not a new WLTBN identity, after the UE of train A controls the WLTBN of train A to be in the active state, it has recorded that it is active The identifier of the WLTBN is no longer recorded at this time.

In addition, the UEs of any group of trains exchange communication signals with the UEs of the second train, and after the train backbone network communication is established, the discovered train identifiers will be synchronized.

Specifically, the UE of the second train sends the identification of any group of trains to the control center through the on-vehicle device of the vehicle-ground communication system.

The control center writes the identification of any group of trains into the RFID transponder located at a fixed position on the track.

In the train backbone network communication, all trains receive the identification of any group of trains from the RFID transponder at a fixed position on the track through their respective RFID readers, and mark the identification of any group of trains.

For example,

The UE of train B (that is, the second train) sends the identification of train A (that is, any group of trains) to the control center through the on-board device of its vehicle-ground communication system.

The control center writes the identification of train A into the RFID transponder located at a fixed position on the track.

In the train backbone network communication, all trains (including train A) receive the identification of train A from the RFID transponder at a fixed position on the track through their respective RFID readers, and mark the identification of train A.

There are two situations in which the UE of train A obtains the responses of other RFID transponders through its RFID reader. One situation is that train A is a group of individual trains that have not established train backbone network communication, and train A reads through its RFID reader. The reader obtains responses from other RFID transponders and finds another group of trains that need to be marshalled. The other group of trains can be a group of individual trains that have not established train backbone network communication, or have established train backbone network communication with other trains. One of the multiple sets of trains. Another situation is that train A itself has established train backbone network communication, that is, train A is one of the multiple groups of trains that have established train backbone network communication with other trains, and train A is used by another group of other trains that need to be organized (such as train C) found. For example, train A once established train backbone network communication with other trains through the train virtual formation network system provided by this embodiment, and this time the train virtual formation network system provided by this embodiment was discovered by other trains (such as train C) arrive.

The above process describes the first case, that is, train A is a single group of trains for which no train backbone network communication has been established. For the second case, the implementation process of this step is:

For any set of trains,

After the RFID transponder of any group of trains responds to other RFID readers, the RFID reader of any group of trains obtains the identification of the third train from the RFID transponder of the third train. Wherein, the third train is the train where the responding RFID reader is located.

The UE of any group of trains determines whether there is an identifier of the third train in the formation information.

If there is, then the UE of any group of trains is determined to be discovered by the trains in the formation.

The UEs of any group of trains interact with the UEs of the third train to establish communication on the train backbone network.

That is, in this case, the UE of train A and the UE of train C perform communication signal interaction to establish train backbone network communication.

For example, after the RFID transponder of train A responds to other RFID readers, the RFID reader of train A obtains the identification of train C from the RFID transponder of the third train (such as train C).

Wherein, train C is the train where the responding RFID reader is located.

The UE of train A determines whether there is an identifier of train C in the formation information.

If there is, then the UE of train A is determined to be discovered by the trains in the formation. That is, train A is discovered by train C. If it does not exist, then end the process of being discovered this time, re-execute the step that the UE of train A obtains the responses of other RFID transponders through its RFID reader, and continue to discover the train.

The UE of train A exchanges communication signals with the UE of train C to establish train backbone network communication.

In addition, if train A has activated its WLTBN during the above steps, and during this round of being discovered by train C, the identity of train C is smaller than the identity of train A, then train C will activate its WLTBN, and train A needs Change its WLTBN to a backup state to ensure that only one group of trains' WLTBNs are active in the established train backbone network communication.

Specifically, the UE of train C sends a request to the UE of train A, and the UE of train A receives the request sent by train C. The UE of train A controls the WLTBN of train A to be in backup state.

In addition, after train C and train A establish the train backbone network communication, train A will also mark the logo of train C, that is,

1) The UE of train A marks the identity of train C.

2) The UE of train A sends the identification of train C to the control center through the on-board device of the vehicle-ground communication system of the train to instruct the control center to synchronize the identification of train C.

3) The control center sends the identification of the train C to the RFID transponder located at a fixed position on the track, so as to synchronize with each train through the RFID transponder.

4) UEs of all trains (including train A and train C) that establish train backbone network communication receive the identity of train C synchronized by the control center from the RFID transponder at a fixed position on the track through the RFID reader of the train.

5) The UEs of all trains establishing train backbone network communication mark the identity of train C.

If all the marks in the marshalling information are marked by the UE of the train, the establishment of the train backbone network communication is completed, and the UE control of the train jumps out of the establishment method of the train backbone network communication.

So far, the method for establishing the train backbone network communication provided by this application has been completed.

105. Create a whitelist for the UE of the train that establishes train backbone network communication.

specific,

1. The UE of the train establishing train backbone network communication determines whether it is located at the end.

The determination process is:

For any train establishing train backbone network communication,

The UE of any train confirms through its RFID reader whether there is an RFID transponder of the eighth train interacting with it.

Wherein, the eighth train is a train for establishing train backbone network communication, and the eighth train is not any train.

If there are two sets of eighth trains interacting with it, the UE of any train determines that any train is not at the end.

If there is only one set of eighth trains to interact with, the UE of any train determines that any train is at the end.

That is to say: if there are two groups of trains interacting with it, it means that a group of trains are connected to its front end and rear end, and the UE of any train determines that any train is not located at the end of the virtual formation, that is, it is located in the middle of the virtual formation. If there is only one group of trains interacting with it, it means that there is a group of trains connected to its front end or rear end, and not all trains are connected at both ends, and the UE of any train determines that any train is located at the end of the virtual formation.

2. The UE of the fifth train generates a sublist.

Wherein, the sublist includes the identifier of the fifth train.

The fifth train is the train located at the end among the trains establishing the train backbone network communication.

3. The UE of the fifth train transmits the sublist to the seventh train after supplementing the identifiers of the sixth trains to the sublist through the sixth trains in turn.

Among them, the sixth train is the train not located at the end among the trains establishing the train backbone network communication, and the seventh train is the train located at the other end among the trains establishing the train backbone network communication.

specific,

The UE of the fifth train sends the sublist to a set of UEs of the sixth train directly connected to it.

The UE of the sixth train that received the sublist adds its identity to the last line of the received sublist.

The UE of the sixth train that has received the sublist sends the supplementary sublist to the next group of trains.

If the latter group of trains is the sixth train, repeat the last group of UEs of the sixth train to add its identifier to the last line of the received sublist, and send the supplementary sublist of the latter group of UEs of the sixth train to the latter Steps to group the train.

Take train C, train A, train B and train D as an example in the train sequence of the virtual formation. If train C is the fifth train, then both train A and train B are the sixth train, and train D is the seventh train.

The UE of train C sends the sublist (including the identity of train C) to the UE of train A directly connected to it.

The UE of train A adds its identity to the last line of the received sublist. At this time, the sublist is the identifier of train C and the identifier of train A.

Train A sends the supplementary sublist (ie, the sublist is the identifier of train C, and the identifier of train A) to the next group of trains (ie, train B).

If train B is not another group of trains located at the end of the virtual formation, the UE of train B will add the identifier of train B to the last line of the received sublist (that is, the sublist is the identifier of train C, the identifier of train A, and the identifier of train B ID of train 3), and send the sub-list supplemented by the UE of train 3 (that is, the sub-list is the ID of train C, the ID of train A, and the ID of train B) to the next group of trains (ie, train D).

Since the train D is another group of trains located at the end of the virtual formation, this step is exited and subsequent steps are performed.

Through this step, all the trains located in the middle of the virtual formation will add their identifications to the sublist according to their order in the virtual formation.

In addition, in order to ensure that the trains in the registration list are all matching trains, the trains in the list will also be verified, such as confirming whether the brakes and the maximum speed match.

Specifically, before the UE of the sixth train that has received the sublist sends the supplementary sublist to a subsequent group of trains, the UE of the sixth train that has received the sublist will also verify the received sublist and determine Validation succeeded. If the verification is unsuccessful, it means that the train does not match, and then the whitelist establishment process will be exited, and the establishment of the whitelist will be stopped.

The UEs of the sixth train in the latter group add their identifiers before the last line of the received sublist, and the UEs in the sixth train in the latter group verify the received sublist and determine that the verification is successful. If the verification is unsuccessful, it means that the train does not match, and then the whitelist establishment process will be exited, and the establishment of the whitelist will be stopped.

4. The UE of the seventh train adds its identifier to the received sublist and then establishes a whitelist.

specific,

The UEs of the seventh train add their identities to the received sublist.

The UE of the seventh train synchronizes its supplemented sublist with the ninth train through the established train backbone network communication.

Wherein, the ninth train is a train for establishing train backbone network communication, and the ninth train is not the seventh train.

After receiving the synchronized sublist, the UE of the tenth train checks the synchronized sublist.

Among them, the tenth train is the train whose WLTBN is in the activated state during the establishment of the train backbone network communication.

If the verification is passed, the UE in the tenth train determines the synchronized sublist as the whitelist.

Still take the example that the train sequence of the virtual formation is train C, train A, train B and train D. If train D is the seventh train, then train C, train A and train B are all ninth trains, and train D is the seventh train. The tenth train is the train whose WLTBN is activated among train C, train A, train B and train D (that is, the train with the smallest identifier of train C, train A, train B and train D).

That is, the UE of train D adds its identifier to the received sublist (that is, the sublist includes the identifier of train C, the identifier of train A, the identifier of train B, and the identifier of train D).

The UE of train D synchronizes its supplemented sublist with train C, train A and train B (that is, the sublist is the identifier of train C, the identifier of train A, the identifier of train B, and the identifier of train D).

After receiving the synchronized sublist, the UE of the train whose WLTBN is in the activated state checks the synchronized sublist.

If the verification is passed, the UE of the train whose WLTBN is in the activated state determines the synchronized sublist as the whitelist.

Similarly, in order to ensure that the trains in the registration form are all matching trains, before the UE of the seventh train adds its identifier to the received sublist, the UE of the seventh train verifies the received sublist and confirms the verification success. If the verification is unsuccessful, it means that the train does not match, and then the whitelist establishment process will be exited, and the establishment of the whitelist will be stopped.

After step 105 is executed, the white list will also be synchronized to all trains in the virtual formation.

For example: the UE of the train whose WLTBN is in the activated state synchronizes the whitelist to other trains in the virtual formation. That is, the UE of the tenth train synchronizes the white list with the eleventh train through the established train backbone network communication.

Wherein, the eleventh train is a train for establishing train backbone network communication, and the eleventh train is not the tenth train.

After synchronizing the whitelist, the UE of the train whose WLTBN is in the activated state sends a whitelist establishment completion message to other trains in the virtual formation. That is, the UE of the tenth train sends whitelist establishment completion information to the eleventh train through the established train backbone network communication.

106. The UE of the train establishing the train backbone network communication determines the main role of the WLTBN according to the white list.

Before step 106 is executed, the entire virtual grouping has been completed, that is, all signs in the grouping information have been marked.

When performing step 106,

1. The UE of the tenth train determines the number of train groups for establishing train backbone network communication.

Since the initial activation of the WLTBN was performed when the train backbone network communication was established and then marshalled, there was already a group of trains whose WLTBN was activated before this step, that is, the train with the smallest identifier among all the trains in the virtual marshalling WLTBN is active.

In this step, the trains whose WLTBN is activated determine the total number of trains in the virtual formation.

2. The UE of the tenth train determines the main role train among the trains establishing train backbone network communication according to the number of groups.

Specifically, if the number of groups is not greater than 2, the UE of the tenth train determines that the main role train is the tenth train.

If the number of groups is greater than 2, then

When the group number is an odd number, the UE of the tenth train determines that the master role train is a group of trains located in the middle of the train backbone network communication.

When the number of groups is an even number, the UE of the tenth train determines that the main role train is a group of trains with a smaller ID among the two groups of trains located in the middle of the train backbone network communication.

That is, the train in the middle of the virtual formation is the main role train, and if there are two trains in the middle, the one with the smallest identifier among the two is selected as the main role train.

In order to ensure the validity of the main role, after the WLTBN activated train determines the main role train, it will also obtain the confirmation of the main role train. If confirmed, the next group of trains of the main character train will be determined as the main role train, and the confirmation of the new main role train will be obtained again. , until it is confirmed by a group of trains, and finally the main character train is obtained.

That is, the UE of the tenth train obtains the confirmation message fed back by the UE of the master train. If the confirmation message is not obtained, the UE of the tenth train updates the main role train to a group of trains following the main role train. Repeat the execution, the UE of the tenth train obtains the confirmation message fed back by the UE of the main role train, if the confirmation message is not obtained, the UE of the tenth train updates the main role train to the next group of trains of the main role train until A confirmation message is obtained.

For example, the UE of the train whose WLTBN is in the activated state obtains the confirmation message fed back by the UE of the master train. If the confirmation message is not obtained, the UE of the train whose WLTBN is in the activated state updates the main role train to a group of trains after the main role train. Repeat the execution, the UE of the train whose WLTBN is in the activated state obtains the confirmation message fed back by the UE of the main role train. The step of forming a train until a confirmation message is obtained.

3. The UE of the master role train sends the WLTBN identifier and UE identifier of the master role train to the eleventh train through the established train backbone network communication.

For example, the UE of the main role train synchronizes the WLTBN identifier of the main role train with other trains in the virtual formation.

107. When the activated WLTBN is not in the master role, the UE on the train where the activated WLTBN is located controls its WLTBN to be in the backup state, and at the same time, the UE on the train where the master role is located controls its WLTBN to be in the active state.

Due to the train backbone network communication established by the method provided by the present application, only the WLTBN of one group of trains will be active. Therefore, this step will change the only active WLTBN of the virtual consist to the WLTBN of the main role train.

That is, the UE of the tenth train controls its WLTBN to be in backup state. The UE of the master role train controls its WLTBN to be active.

During the process in which the UE of the main role train controls its WLTBN to be in an activated state, the UE of the tenth train sends an activation request to the UE of the main role train. Based on the activation request, the UE of the master role train controls its WLTBN to be in the activated state.

For example: before the main role train synchronizes the WLTBN identification of the main role train to other trains in the virtual formation, the UE of the train whose WLTBN is activated controls its WLTBN to be in the backup state. The UE of the master role train controls its WLTBN to be active.

For example, the UE of the train whose WLTBN is activated sends an activation request to the UE of the master train. Based on the activation request, the UE of the master role train controls its WLTBN to be in the activated state.

The train virtual marshalling network system provided in this embodiment includes a control center and multiple groups of trains for marshalling. Through this system, the establishment of train backbone network communication can be completed, and then virtual networking can be realized.

In order to complete the identification of information between trains, RFID transponders and RFID readers are installed at both ends of each group of trains. The communication between trains is realized by LTE technology, and a set of LTE core network and access network integrated equipment WLTBN is configured on each group of trains, and a set of marshalling network and UE is configured.

Among them, ED obtains marshalling information via RFID and sends it to UE; UE is an LTE client to realize inter-train communication signal interaction; WLTBN represents the integrated equipment of LTE core network and access network, providing connections with UEs of different trains , that is, the initial operation of trains in different formations (that is, the identification and initialization of information between trains in flexible formations).

According to various input conditions such as passenger flow and lines, the ground control center sends to the train the vehicle information that needs to be marshalled (that is, the marshalling information), that is, the marshalling identification number that needs to be marshalled, and each marshalling collects marshalling input information. After the marshalling vehicle collects the marshalling request, in order to realize the flexible marshalling of the train, it first needs to realize the communication function on the train backbone network, and the communication terminal equipment of each marshalling needs to discover each other. Because the structure of the train formation may change (reconnection of formations or failure of a certain formation in the formation train), it is necessary to formulate corresponding mechanisms for different application scenarios, that is, to realize the initial operation configuration of WLTBN and the line selection under fault conditions Strategy.

The train backbone network communication established by the establishment system of the train backbone network communication of the embodiment has the following characteristics:

1. In the process of establishing the train backbone network communication, only the WLTBN in one group of trains is allowed to be activated, that is, to work as the master node, and the WLTBNs in other groups are in backup mode.

2. UEs in each group of trains can only connect to one WLTBN at a time.

3. UEs of different trains can be connected to one WLTBN at the same time, that is, the WLTBN in the activated state.

4. The RFID transponder provides marshalling data to the train where it is located. The marshalling data includes at least: the marshalling ID of the local marshalling, the direction information of the local marshalling, the number of cars in the local marshalling, the ID of the WLTBN it belongs to, and the ID of the UE it belongs to.

5. The UE of the train uses the formation information provided by RFID, and adds the information to the white list of WLTBN, and establishes communication with other formations.

When the initial operation of the train begins, the ED obtains the formation information with the help of the RFID devices installed at both ends of the vehicle, and sends the formation information to the UE of this formation, and stores it in WLTBN, and the UE uses the formation information to establish a communication connection with other trains .

During the establishment of train backbone network communication,

1. The control center determines the trains to be marshalled, and forms a message with the ID of the train that needs to be marshalled, that is, the marshalling input information is transmitted to each marshalling train through LTE wireless communication; at the same time, the control center writes the information to a specific RFID in the track, The information is obtained as soon as the train passes; after the train reads the information, it compares it with its own information, if it is, it needs to enter the marshalling program, if not, it does not need to be processed.

2. The ED of each train acquires formation information by means of the RFID transponders installed at both ends of the train, or by means of the on-board device of the train-ground communication system.

3. The UE inserts the grouping information into the WLTBN of the grouping.

4. The train formation discovery process starts from any two groups of vehicles. The WLTBNs of the two groups of vehicles use a competition mechanism. By default, the WLTBN with the smaller formation ID is activated, and the WLTBN of the other formation is in a backup state. After that, the UE and other formations are used. The UE performs information exchange.

5. The UE of each formation vehicle marks the newly accessed formation information in the formation request table of the WLTBN of the formation.

6. Repeat steps 3-5 until all formations in all formations have been discovered, and the WLTBN formation request tables of any formation are all marked and completed, then the train backbone network communication is established, and the backbone network establishment process is exited.

After the backbone network is established, the white list is established, among which

1. Each group vehicle detects the relative position of its own group, that is, uses RFID to detect whether the group vehicle is at the end of the group.

2. If it is an end formation vehicle, then send the sublist of formation information such as the vehicle identification of the formation vehicle to the adjacent formation vehicles; if it is not an end formation vehicle, wait for the sublist sent by the adjacent formation vehicles.

3. The UE of the non-end formation vehicle adds the formation information of the formation to the obtained sublist (ie formation information packet) in order, and sends it to the next formation train in the opposite direction of the received sublist.

4. The UE of any grouped vehicle receives the information of all the grouped vehicles, checks the grouped information packet, and adds grouping information such as the vehicle identification to the sublist after the verification is correct.

5. After receiving the sublist sent by the previous train, the marshalling vehicles at the WLTBN activation end will perform a second verification. After the verification is correct, the communication white list will be established, and the white list establishment completion information will be sent to each marshalling group to exit the white list. Create a process. The white list contains information of all trains in the formation, and the information table defines the white list of communication connections.

After the train completes the discovery process, it will determine the main role of the WLTBN, that is, establish an optimal communication path according to the number and position of the formation configuration, that is, re-determine the WLTBN of the intermediate formation as the master node, and as the active state, the UEs of other formations via The main WLTBN implements signal interaction, and the WLTBNs of other formations work as standby. The primary WLTBN is determined by means of ED equipment.

After the train backbone network communication whitelist is established, each formation UE acts as a gateway for information exchange between the formation and the train backbone network.

The process of determining the main role of WLTBN is as follows:

1. The end group currently in the WLTBN activation state determines which group is the middle group according to the communication white list table.

2. If the number of formations is only one or two, the end formation in the WLTBN activation state maintains the WLTBN main state; otherwise, the end formation in the WLTBN activation state requests the WLTBN activation of the formation through the intermediate formation UE, and implements the formation WLTBN master release.

3. The WLTBN formed in the middle takes over the function of the master node and is set to the active state, and according to the communication whitelist, the master WLTBN establishes a communication connection with UEs in other groups (if the communication connection times out, the master role determination process of the WLTBN will exit).

4. The WLTBN master role information is distributed to all trains in the formation, and the WLTBNs of other formations are set to work in a standby state. All trains in the formation receive the information and confirm it.

5. When the number of formations is an even number, the middle formation is defined as the formation at the front end of the train with the smaller mark among the two formations in the middle. And if the WLTBN with the small train logo close to the formation cannot become the main WLTBN for some reason, then the WLTBN in the formation after formation is selected as the main operation.

6. Repeat steps 4 and 5 until the main role of WLTBN is selected.

It should be noted that "first", "second" and "eleven" in this embodiment are all labels, which are used to distinguish trains in different situations and have no other meanings. For the same group of trains, different labels may be used in different situations. For example, for the end train, it may be the first train when the train is discovered, and it may be the "fifth" train when the whitelist is established. Therefore, this The embodiment does not limit whether the trains with different numbers are the same, and may be the same or different.

The train virtual marshalling network system provided by this embodiment includes: a control center and a plurality of trains for marshalling; an RFID transponder is respectively arranged at both ends of the train, and an on-board device of the train-ground communication system and an RFID reader are arranged inside , one WLTBN and one UE; the control center generates marshalling information and sends the marshalling information to the train; the UE of the train receives the marshalling information; the UE of the train discovers the train according to the marshalling information, establishes the train backbone network communication; establishes the train backbone network communication The UE of the train generating the white list; the UE of the train establishing train backbone network communication determines the main role of the WLTBN according to the white list; when the activated WLTBN is not the main role, the UE of the train where the activated WLTBN is At the same time, the UE of the train where the main character is located controls its WLTBN to be in the active state, realizing the establishment of a train virtual marshalling network system.

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein. The solutions in the embodiments of the present application can be realized by using various computer languages, for example, the object-oriented programming language Java and the literal translation scripting language JavaScript.

The present application is described with reference to flowcharts and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

While preferred embodiments of the present application have been described, additional changes and modifications can be made to these embodiments by those skilled in the art once the basic inventive concept is appreciated. Therefore, the appended claims are intended to be construed to cover the preferred embodiment and all changes and modifications which fall within the scope of the application.

Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

A train virtual marshalling network system, characterized in that the system includes: a control center and multiple groups of trains for marshalling; a radio frequency identification (RFID) transponder is respectively arranged at both ends of each group of trains; The on-board device of the communication system, an RFID reader, a wireless train backbone network node device WLTBN and a backbone network user access device UE;

The control center generates grouping information according to the information of the multiple groups of trains;

The control center sends the composition information to the multiple groups of trains;

The UEs of each group of trains receive the grouping information through the on-board device of the vehicle-ground communication system or the RFID reader;

The UEs of each group of trains discover the trains through RFID readers and RFID transponders according to the marshalling information, and establish train backbone network communication; among the trains establishing train backbone network communication, there is only one group of trains whose WLTBN is in an active state ;

Create a whitelist for the UE of the train that establishes the train backbone network communication;

The UE of the train establishing the train backbone network communication determines the main role of the WLTBN according to the white list;

When the active WLTBN is not in the master role, the UE on the train where the active WLTBN is located controls its WLTBN to be in the backup state, and at the same time, the UE on the train where the master role is located controls its WLTBN to be in the active state.
The system according to claim 1, wherein the composition information includes the identification, direction and number of carriages of each group of trains.
The system according to claim 1, wherein the control center sends the grouping information to the multiple groups of trains, including:

The control center sends the composition information to the multiple groups of trains through the vehicle-ground communication system; or,

The control center sends the composition information to the multiple groups of trains through RFID transponders located at fixed positions on the track.
The system according to claim 3, wherein the UEs of each group of trains receive the grouping information through a vehicle-mounted device or an RFID reader of the train-ground communication system, including:

For any set of trains,

The UE of any group of trains receives the composition information through the on-board device of the vehicle-ground communication system of any group of trains; or,

UEs of any group of trains receive formation information from RFID transponders located at fixed positions on the track through the RFID readers of any group of trains.
The system according to claim 4, characterized in that, after the UEs of each group of trains receive the grouping information through the on-board device or RFID reader of the vehicle-ground communication system, further comprising:

The UEs of each group of trains store the formation information in their respective WLTBNs.
The system according to claim 2, wherein the UEs of each group of trains perform train discovery through RFID readers and RFID transponders according to the formation information, and establish train backbone network communication, including:

For any set of trains,

The UEs of any group of trains obtain responses from other RFID transponders through their RFID readers;

If the response is obtained, the UE of any group of trains determines whether there is an identifier of the second train in the composition information; wherein, the second train is the train where the RFID transponder of the response is located;

If there is, the UE of any group of trains determines to discover the trains in the formation;

The UE of any group of trains performs communication signal interaction with the UE of the second train to establish train backbone network communication;

If the UE of the second train only establishes a train backbone network communication connection with the UEs of any group of trains, the UE of the first small-identified train controls its WLTBN to be in an active state, wherein the first small-identified train is the The second train and the train with the smaller identifier in any group of trains;

If the UE of the second train establishes a train backbone network communication connection with the UEs of multiple groups of trains, the UE of the second small-identified train controls its WLTBN to be in an active state, wherein the second small-identified train is established for the second train All the trains that are communicatively connected to the train backbone network communicate with the train with the smaller identifier in the first train.
The system according to claim 2, wherein the UEs of each group of trains perform train discovery through RFID readers and RFID transponders according to the formation information, and establish train backbone network communication, including:

For any set of trains,

After the RFID transponder of any group of trains answers other RFID readers, the RFID reader of any group of trains obtains the identification of the third train from the RFID transponder of the third train; The third train is the train where the responding RFID reader is located;

The UE of any group of trains determines whether there is an identifier of a third train in the formation information;

If there is, the UE of any group of trains is determined to be found by the trains in the formation;

The UEs of any group of trains exchange communication signals with the UEs of the third train to establish train backbone network communication.
The system according to claim 6, wherein after the UE of the train with the second small ID controls its WLTBN to be in an activated state, it further includes:

If the WLTBNs of two groups of trains are in the active state among all the trains currently establishing the train backbone network communication connection, the UE controller WLTBN of the third train is in the backup state; the WLTBN of the third train is in the active state, and the WLTBN of the first train The third train is not the train with the second smallest logo.
The system according to claim 8, wherein the UE controller WLTBN of the third train is in a backup state, comprising:

The UE of the second small-identified train sends a request to the UE of the third train;

After receiving the request, the UE of the third train controls its WLTBN to be in the backup state.
The system according to claim 1, characterized in that, after the train backbone network communication is established, further comprising:

The fourth train sends the identification of its WLTBN to the control center through the on-board device of its train-ground communication system, wherein the fourth train is a train whose WLTBN is activated in the train backbone network communication;

The control center writes the identification of the WLTBN into the RFID transponder located at a fixed position on the track;

In the train backbone network communication, all trains receive the WLTBN identification from the RFID transponder at a fixed position on the track through their respective RFID readers.
The system according to claim 6, wherein the UEs of any group of trains perform communication signal interaction with the UEs of the second train, and after the train backbone network communication is established, further comprising:

The UE of the second train sends the identification of any group of trains to the control center through the on-board device of its vehicle-ground communication system;

The control center writes the identification of any group of trains into the RFID transponder located at a fixed position on the track;

All trains in the train backbone network communication receive the identification of any group of trains from the RFID transponder at a fixed position on the track through their respective RFID readers, and label the identification of any group of trains.
The system according to claim 2, wherein the white list is generated by the UE of the train establishing train backbone network communication, including:

The UE of the train establishing the train backbone network communication determines whether it is located at the end;

The UE of the fifth train generates a sub-list; wherein, the sub-list includes the identifier of the fifth train, and the fifth train is a train at the end of the trains establishing the train backbone network communication;

The UE of the fifth train transmits the sublist to the seventh train after supplementing the identifiers of the sixth trains to the sublist through the sixth trains in turn; wherein, the sixth train is to establish a train backbone network Among the trains in communication, the trains that are not located at the end, the seventh train is the train located at the other end among the trains establishing the train backbone network communication;

The UE in the seventh train adds its identity to the received sublist and then establishes a whitelist.
The system according to claim 12, wherein determining whether the UE of the train establishing the train backbone network communication is located at the end includes:

For any train establishing train backbone network communication,

The UE of any train confirms through its RFID reader whether there is an RFID transponder of the eighth train interacting with it; wherein, the eighth train is a train for establishing train backbone network communication, and the eighth train is not the any train;

If there are two sets of eighth trains interacting with it, the UE of any train determines that the any train is not located at the end;

If there is only one set of eighth trains interacting with it, the UE of any train determines that the any train is at the end.
The system according to claim 12, wherein the UE of the fifth train transmits the sub-list to the sub-list after sequentially adding the identifiers of the sixth trains to the sub-list through the sixth trains. Seven trains, including:

The UE of the fifth train sends the sublist to a group of UEs of the sixth train directly connected to it;

The UE of the sixth train that has received the sublist adds its identity to the last line of the received sublist;

The UE of the sixth train that has received the sublist sends the supplementary sublist to a subsequent group of trains;

If the latter group of trains is the sixth train, repeat the last group of UEs of the sixth train to add its identifier to the last line of the received sublist, and send the supplementary sublist of the latter group of UEs of the sixth train to the latter Steps to group the train.
The system according to claim 12, wherein the UE of the seventh train adds its identity to the received sublist and then establishes a whitelist, including:

The UE of the seventh train adds its identity to the received sublist;

The UE of the seventh train synchronizes its supplemented sublist to the ninth train through the established train backbone network communication; the ninth train is the train for which the train backbone network communication is established, and the ninth train is not the seventh train ;

After the UE of the tenth train receives the synchronized sublist, it checks the synchronized sublist; wherein, the tenth train is a train whose WLTBN is in an activated state during the establishment of the train backbone network communication;

If the verification is passed, the UE in the tenth train determines the synchronized sublist as the whitelist.
The system according to claim 14, wherein before the UE of the sixth train that has received the sublist sends the supplementary sublist to a subsequent group of trains, it further includes:

The UE of the sixth train that has received the sublist verifies the received sublist and determines that the verification is successful;

The UE of the sixth train in the latter group adds its identity to before the last line of the received sublist, which also includes:

The UEs of the sixth train in the latter group check the received sublist and determine that the check is successful.
The system according to claim 15, wherein the UE of the seventh train adds its identity to the received sublist, further comprising:

The UE in the seventh train checks the received sublist and determines that the check is successful.
The system according to claim 15, wherein after the UE of the tenth train determines the synchronized sublist as a whitelist, it further includes:

The UE of the tenth train synchronizes the whitelist to the eleventh train through the established train backbone network communication; wherein, the eleventh train is the train for which the train backbone network communication is established, and the eleventh train is not the Tenth train.
The system according to claim 15, wherein after the UE of the tenth train determines the synchronized sublist as a whitelist, it further includes:

The UE of the tenth train sends whitelist establishment completion information to the eleventh train through the established train backbone network communication;

Wherein, the eleventh train is a train establishing train backbone network communication, and the eleventh train is not the tenth train.
The system according to claim 11, wherein, before the UE of the train establishing train backbone network communication determines the main role of WLTBN according to the white list, further comprising:

Each group of trains confirms that all signs in the formation information are marked.
The system according to claim 20, wherein the UE of the train establishing the train backbone network communication determines the main role of the WLTBN according to the white list, including:

The UE of the tenth train determines the number of train groups for establishing train backbone network communication; wherein, the tenth train is a train whose WLTBN is in an activated state during the establishment of train backbone network communication;

The UE of the tenth train determines the main role train among the trains establishing the train backbone network communication according to the group number;

The UE of the main role train sends the WLTBN identification and UE identification of the main role train to the eleventh train through the established train backbone network communication;

Wherein, the eleventh train is a train establishing train backbone network communication, and the eleventh train is not the tenth train.
The system according to claim 21, wherein the UE of the tenth train determines the main role train among the trains establishing train backbone network communication according to the number of groups, including:

If the number of groups is not greater than 2, the UE of the tenth train determines that the main role train is the tenth train.
The system according to claim 21, wherein the UE of the tenth train determines the main role train among the trains establishing train backbone network communication according to the number of groups, including:

If the number of groups is greater than 2, then

When the number of groups is an odd number, the UE of the tenth train determines that the main role train is a group of trains located in the middle of the train backbone network communication;

When the group number is an even number, the UE of the tenth train determines that the main role train is a group of trains with a smaller identifier among the two groups of trains located in the middle of the train backbone network communication.
The system according to claim 23, characterized in that, after the main role train is determined in the train establishing the train backbone network communication, further comprising:

The UE of the tenth train obtains the confirmation message fed back by the UE of the main role train;

If the confirmation message is not obtained, the UE of the tenth train updates the main role train to a set of subsequent trains of the main role train;

Repeated execution, the UE of the tenth train obtains the confirmation message fed back by the UE of the main role train, if the confirmation message is not obtained, the UE of the tenth train updates the main role train to the next group of trains of the main role train until a confirmation message is obtained.
The system according to claim 4, wherein before the UE of the main role train sends the WLTBN identity and UE identity of the main role train to the eleventh train through the established train backbone network communication, further comprising: :

The UE of the tenth train controls its WLTBN to be in a backup state;

The UE of the master role train controls its WLTBN to be active.
The system according to claim 25, wherein the UE of the main role train controls its WLTBN to be in an active state, including:

The UE of the tenth train sends an activation request to the UE of the master role train;

The UE of the master role train controls its WLTBN to be in an activated state based on the activation request.