Train communication method and system

Abstract

The invention discloses a train communication method and system. The method comprises the steps that when a train travels to a first position, a control center issues a second position corresponding to the train and a target condition to the train; wherein the train is in communication connection with the control center through the first communication module; the second position is located in an overlapping area of a communication coverage area of the first communication module and a communication coverage area of a second communication module to be switched; and under the condition that the actual driving information of the train meets the target condition, the train establishes connection with the second communication module at the second position and sends data to the control center through the first communication module and the second communication module. According to the scheme, the position and condition of the train for executing communication module switching can be determined based on the control center, and the accuracy of switching position determination and the efficiency of executing communication network switching are improved; meanwhile, due to the redundant transmission design of the data after the communication modules are switched, communication interruption when the train executes switching of the communication modules is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of train communications, and in particular to a train communication method and system. Background Art

[0002] The wireless network coverage of high-speed railways and heavy-load railways is linear, distributed linearly along the railway, and the network focuses on covering the railway tracks and areas along the line. The design of the base station spacing must ensure that the communication of the train is not interrupted during high-speed driving. To ensure the reliability of communication, the network uses overlapping coverage for redundancy. When a base station signal becomes weak or fails, the train quickly switches to the adjacent base station signal in the overlapping coverage area to prevent communication interruption.

[0003] At present, the train network switching adopts hard switching, where the train's onboard communication equipment first disconnects from the original base station and then establishes a communication link with the new base station. However, when the train is moving at high speed, communication interruption during the communication network switching will lead to serious problems such as loss of train control information; and the distance between the train and different base stations and the signal propagation environment are constantly changing, causing the communication signal to fail to switch due to terrain obstruction and other reasons. Summary of the invention

[0004] The present invention provides a train communication method and system to solve the problem of communication interruption or switching failure when the train switches the communication network during high-speed movement.

[0005] According to one aspect of the present invention, a train communication method is provided, the method comprising:

[0006] When the train reaches the first position, the control center sends the second position and target conditions corresponding to the train to the train; wherein the train is connected to the control center through the first communication module; the second position is located inside the overlapping area of ​​the communication coverage area of ​​the first communication module and the communication coverage area of ​​the second communication module to be switched;

[0007] When the actual travel information of the train meets the target condition, the train establishes a connection with the second communication module at the second position, and sends data to the control center through the first communication module and the second communication module.

[0008] According to another aspect of the present invention, a train communication system is provided, the system comprising: a control center, a plurality of trains and a plurality of communication modules; the control center transmits data to the trains through the communication modules connected to the trains; wherein,

[0009] The control center is used to send a second position and a target condition corresponding to the train to the train when the train travels to the first position; wherein the train is connected to the control center through a first communication module among the plurality of communication modules; and the second position is located inside an overlapping area between a communication coverage area of ​​the first communication module and a communication coverage area of ​​the second communication module to be switched;

[0010] The train is used to establish a connection with a second communication module among multiple communication modules at a second position when its actual travel information meets the target condition, and send data to the control center through the first communication module and the second communication module.

[0011] The technical solution of the embodiment of the present invention is that when the train travels to the first position, the control center sends the second position and target conditions corresponding to the train to the train; wherein the train is connected to the control center through the first communication module; the second position is located inside the overlapping area of ​​the communication coverage area of ​​the first communication module and the communication coverage area of ​​the second communication module to be switched, so that the position and conditions for the train to execute the communication module switching are determined by the control center, and the accuracy of the switching position determination is improved, thereby improving the efficiency of executing the communication module switching and avoiding the waste of network resources; when the actual driving information of the train meets the target conditions, the train establishes a connection with the second communication module at the second position, and sends data to the control center through the first communication module and the second communication module, realizing the redundant transmission of the data after the communication module switching, and being able to send data to the control center through the first communication module and the second communication module at the same time, avoiding the communication interruption when the train executes the communication module switching, reducing the risk of data loss, and making the network switching safe and reliable.

[0012] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 A flow chart of a train communication method provided in Embodiment 1 of the present invention;

[0015] Figure 2 This is an architecture diagram of a train onboard system provided in Embodiment 1 of the present invention;

[0016] Figure 3 A structural diagram of a control center provided in Embodiment 1 of the present invention;

[0017] Figure 4 A schematic diagram of a train running in a communication coverage area provided in Embodiment 1 of the present invention;

[0018] Figure 5 A schematic diagram of a switching scenario of a communication module during train travel provided by Embodiment 1 of the present invention;

[0019] Figure 6 A flow chart of a train communication method provided in Embodiment 2 of the present invention;

[0020] Figure 7 This is a structural diagram of a train communication system provided in Example 3 of the present invention. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0022] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0023] It should be noted that the modifications of "one" and "plurality" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0024] The names of the messages or information exchanged between multiple devices in the embodiments of the present disclosure are only used for illustrative purposes and are not used to limit the scope of these messages or information.

[0025] It is understandable that before using the technical solutions disclosed in the embodiments of the present disclosure, the types, scope of use, usage scenarios, etc. of the personal information involved in the present disclosure should be informed to the user and the user's authorization should be obtained in an appropriate manner in accordance with relevant laws and regulations.

[0026] For example, in response to receiving an active request from a user, a prompt message is sent to the user to clearly prompt the user that the operation requested to be performed will require obtaining and using the user's personal information. Thus, the user can autonomously choose whether to provide personal information to software or hardware such as an electronic device, application, server, or storage medium that performs the operation of the technical solution of the present disclosure according to the prompt message.

[0027] As an optional but non-limiting implementation, in response to receiving an active request from the user, the prompt information may be sent to the user in the form of a pop-up window, in which the prompt information may be presented in text form. In addition, the pop-up window may also carry a selection control for the user to choose "agree" or "disagree" to provide personal information to the electronic device.

[0028] It is understandable that the above notification and the process of obtaining user authorization are merely illustrative and do not constitute a limitation on the implementation of the present disclosure. Other methods that meet the relevant laws and regulations may also be applied to the implementation of the present disclosure.

[0029] It is understandable that the data involved in this technical solution (including but not limited to the data itself, the acquisition or use of the data) shall comply with the requirements of relevant laws, regulations and relevant provisions.

[0030] Embodiment 1

[0031] Figure 1 This is a flow chart of a train communication method provided in Embodiment 1 of the present invention. This embodiment is applicable to the case where communication network switching is performed during the operation of a train. The method can be executed by a train communication system, which can be implemented in the form of hardware and / or software.

[0032] like Figure 1 As shown, the method may specifically include:

[0033] S101. When the train reaches the first position, the control center sends the second position and target conditions corresponding to the train to the train; wherein the train is connected to the control center through the first communication module; the second position is located inside the overlapping area between the communication coverage area of ​​the first communication module and the communication coverage area of ​​the second communication module to be switched.

[0034] In the embodiment of the present invention, a train may refer to a vehicle running along a railway track for transportation between different areas, such as a freight train or a passenger train. Figure 2 , the train is equipped with on-board train control system signal equipment and integrated communication devices. Among them, the on-board train control system signal equipment records the train's location information, speed information, clock information, running direction, line data and environmental data and synchronizes them to the integrated communication device. The integrated communication device is usually arranged around the track of the train. Exemplarily, the integrated communication device includes one or more communication units of different communication formats such as the fifth generation railway mobile communication system (5th Generation Railway Mobile Communication System, 5G-R), the long term evolution railway communication system (Long Term Evolution for Railway, LTE-R), the global system for mobile communications-railway (Global System for Mobile Communications-Railway, GSM-R) and satellites, which are used to establish a communication link within the network coverage of the corresponding communication format.

[0035] The control center may refer to a center established on the ground for controlling the operation of trains. Figure 3 , the control center includes Internet equipment, data processing center and network control center. The Internet equipment in the control center provides network access and is connected to networks such as GSM-R network, LET-R network, 5G-R network and satellite network. Among them, the base station equipment of networks such as GSM-R network, LET-R network, 5G-R network and satellite network can be set in the vicinity of the train track. The Internet equipment in the control center is also used to collect wireless data, train control data and train operation information and send them to the data processing center and the network control center respectively. The data processing center is used to store and process various communication signal data, train control data and driving data of the train. The network control center is used to comprehensively calculate the target conditions that the train meets when executing the communication module switching based on the received train position information, speed information, running direction information, train number, line information, operating environment information and train operation diagram, combined with electronic maps, GMS-R, satellite, 5G-R and LET-R network coverage key information, such as field strength, network load, etc.

[0036] refer to Figure 4 The first communication module can be configured in a base station or a satellite. When the train is within the communication coverage area of ​​the first communication module, the train can communicate with the control center through the first communication module. The second position can refer to the position of the train when the communication module is switched. The first position can refer to the position of the train before it reaches the second position in the driving path.

[0037] Specifically, the control center can determine the position of the train when the communication module is switched within the overlapping area of ​​the communication coverage area of ​​the first communication module and the communication coverage area of ​​the second communication module to be switched as the second position. Then, when the train reaches the first position, the control center can send the second position and target conditions corresponding to the train to the train.

[0038] Exemplary, reference Figure 5 , the communication coverage area of ​​the first communication module is area 1, the communication coverage area of ​​the second communication module to be switched is area 2, and the second position is point C in the overlapping area of ​​area 1 and area 2. Then, when the train travels to the first position before the second position C, the control center can send the second position C and the target conditions to the train.

[0039] As an optional implementation of the embodiment of the present invention, the first position is located inside the communication coverage area of ​​the first communication module and outside the communication coverage area of ​​the second communication module.

[0040] Specifically, the first position may refer to a position in the train travel path that is located inside the communication coverage area of ​​the first communication module and outside the communication coverage area of ​​the second communication module. Figure 5 Point A is located inside region 1 and outside region 2.

[0041] As an optional implementation manner of an embodiment of the present invention, before the control center sends the second position and target conditions corresponding to the train to the train when the train travels to the first position, it also includes: the control center determines the second communication module corresponding to the train according to the travel position and travel route of the train, and obtains the overlapping area between the communication coverage area of ​​the first communication module connected to the train and the communication coverage area of ​​the second communication module; the control center determines the target distance according to the train type and / or travel speed of the train, and determines the position whose distance from the position where the train enters the overlapping area is greater than or equal to the target distance as the first position.

[0042] Specifically, when the train is traveling within the communication coverage area of ​​the first communication module, the train can transmit the train's driving position and driving route to the control center through the first communication module. Thus, the control center can determine the second communication module to be switched corresponding to the train based on the received driving position and driving route of the train, and determine the communication coverage area of ​​the second communication module and the overlapping area between the communication coverage area of ​​the first communication module and the communication coverage area of ​​the second communication module. Furthermore, the target distance can be determined based on the train type of the train, the driving speed of the train, or the train type and driving speed of the train, and the position in the train's driving path where the distance from the overlapping area is greater than or equal to the target distance is taken as the first position.

[0043] Optionally, the control center determines the target time according to the train type and / or the travel speed of the train, and determines the position where the time from the position where the train enters the overlapping area is greater than or equal to the target time as the first position.

[0044] As an optional implementation manner of an embodiment of the present invention, after obtaining the overlapping area between the communication coverage area of ​​the first communication module connected to the train and the communication coverage area of ​​the second communication module, it also includes: the control center determines the second position corresponding to the train from multiple candidate positions according to the preset driving information of the train, the expected communication signal strength at multiple candidate positions in the overlapping area, the communication load of the first communication module and the communication load of the second communication module.

[0045] In the embodiment of the present invention, the preset driving information may refer to the preset driving information that the train complies with when the train is running. For example, the preset driving speed, driving time and driving direction of the train. The communication signal strength can be used to evaluate the communication performance, affect the communication quality or data transmission rate, etc. The communication load may refer to a number of trains connected to the communication module in the communication coverage area of ​​the communication module.

[0046] Specifically, the control center can determine the second position when the train executes communication module switching from multiple candidate positions based on the preset driving information of the pre-set train, the expected communication signal strength at multiple candidate positions in the overlapping area, the communication load of the first communication module, and the communication load of the second communication module.

[0047] Exemplarily, the control center can determine the second position at which the train executes communication module switching from multiple candidate positions when the preset driving information of the train meets the preset information restriction conditions, the expected communication signal strength at multiple candidate positions in the overlapping area is within the preset strength range or reaches the preset strength threshold, the communication load of the first communication module is lower than the first preset load, and the communication load of the second communication module is lower than the second preset load.

[0048] S102: When the actual travel information of the train meets the target condition, the train establishes a connection with the second communication module at the second position, and sends data to the control center through the first communication module and the second communication module.

[0049] Specifically, when the train receives the second position and target conditions sent by the control center, it can determine in real time or periodically whether the actual driving information of the train meets the target conditions. The actual driving information may refer to the train driving information actually collected when the train is driving. Furthermore, when it is detected that the actual driving information of the train meets the target conditions and the train travels to the second position, a connection with the second communication module is established. When the connection between the train and the second communication module is established, the train can send data to the control center through the first communication module and the second communication module at the same time.

[0050] Exemplary, reference Figure 5 , Figure 5 The position of point B is the position of the projection point on the track of the farthest boundary point of the overlapping area (the nearest boundary point of the communication coverage area of ​​the second communication module) before the train enters the overlapping area between the communication coverage area of ​​the first communication module and the communication coverage area of ​​the second communication module, along the direction of the train track. Furthermore, when the train receives the second position and target conditions issued by the control center at the first position A, it can initiate a connection request with the second communication module at point A, and start real-time judgment or periodic judgment at the intersection of the boundary of the overlapping area and the track when the train enters the overlapping area. Whether the actual driving information of the train meets the target conditions, and when the actual driving information of the train meets the target conditions, it starts to establish a connection with the second communication module at the second position C, and enters the switching process between the first communication module and the second communication module. When the train completes the connection with the second communication module, it arrives Figure 5 At point D, the train can send data to the control center through the first communication module and the second communication module at the same time after point D and before leaving the overlapping area.

[0051] As an optional implementation manner of an embodiment of the present invention, the target condition includes at least one of the following conditions: the train's running speed is within a preset speed range; the change in the train's running speed within a preset time period is within a preset change range; the train's actual running track is a preset running track; the position deviation between the train's actual running position and the expected running position is within a preset deviation range; the time difference between the train's actual arrival time at the target position and the expected arrival time is within a preset difference range; the communication load of the first communication module and / or the second communication module satisfies the preset load condition; the communication signal strength of the first communication module and / or the second communication module satisfies the preset first strength condition.

[0052] Specifically, when the train's running speed is within a preset speed range, the change in the train's running speed within a preset time period is within a preset change range, the train's actual running track is a preset running track, the position deviation between the train's actual running position and the expected running position is within a preset deviation range, the time difference between the train's actual arrival time at the target position and the expected arrival time is within a preset difference range, the communication load of the first communication module and / or the second communication module satisfies the preset load condition, and the communication signal strength of the first communication module and / or the second communication module satisfies at least one of the preset first strength conditions, it can be considered that the actual running information of the train meets the target condition.

[0053] The technical solution of the embodiment of the present invention is that when the train travels to the first position, the control center sends the second position and target conditions corresponding to the train to the train; wherein the train is connected to the control center through the first communication module; the second position is located inside the overlapping area of ​​the communication coverage area of ​​the first communication module and the communication coverage area of ​​the second communication module to be switched, so that the position and conditions for the train to execute the communication module switching are determined by the control center, and the accuracy of the switching position determination is improved, thereby improving the efficiency of executing the communication module switching and avoiding the waste of network resources; when the actual driving information of the train meets the target conditions, the train establishes a connection with the second communication module at the second position, and sends data to the control center through the first communication module and the second communication module, realizing the redundant transmission of the data after the communication module switching, and being able to send data to the control center through the first communication module and the second communication module at the same time, avoiding the communication interruption when the train executes the communication module switching, reducing the risk of data loss, and making the network switching safe and reliable.

[0054] Embodiment 2

[0055] Figure 6 A flow chart of a train communication method provided in the second embodiment of the present invention. The technical solution of this embodiment is based on the technical solution of the above embodiment, and further refines the process in the above embodiment in which the control center sends the second position and target condition corresponding to the train to the train when the train travels to the first position. The specific implementation method can refer to the description of this embodiment. Among them, the technical features that are the same or similar to the above embodiment are not repeated here.

[0056] like Figure 6 As shown, the method may specifically include:

[0057] S201. When the train reaches the first position, the control center sends the second position and target conditions corresponding to the train to the train; wherein the train is connected to the control center through the first communication module; the second position is located inside the overlapping area between the communication coverage area of ​​the first communication module and the communication coverage area of ​​the second communication module to be switched.

[0058] S202. When the actual driving information of the train does not meet the target condition, after the train enters the overlapping area between the communication coverage area of ​​the first communication module and the communication coverage area of ​​the second communication module to be switched, the communication signal strength of the first communication module and the second communication module are obtained.

[0059] Specifically, when the actual driving information of the train does not meet the target conditions and the train travels into the overlapping area between the communication coverage area of ​​the first communication module and the communication coverage area of ​​the second communication module, the communication signal strength of the first communication module and the communication signal strength of the second communication module are obtained respectively.

[0060] S203: Establish a communication connection with the second communication module at a third position where the communication signal strength of the first communication module and / or the second communication module meets a preset second strength condition, and send data to the control center through the first communication module and the second communication module.

[0061] Specifically, when the train enters the overlapping area between the communication coverage area of ​​the first communication module and the communication coverage area of ​​the second communication module, the position of the train when the communication signal strength of the first communication module meets the second strength condition, the communication signal strength of the second communication module meets the second strength condition, or the communication signal strengths of the first communication module and the second communication module both meet the second strength condition can be used as the third position. Among them, the second strength condition can be pre-set according to actual conditions and ensure that the train can establish a connection with the second communication module. Furthermore, the train can establish a connection with the second communication module at the third position, and when the connection between the train and the second communication module is established, the train can send data to the control center through the first communication module and the second communication module at the same time.

[0062] Exemplary, reference Figure 5 When the train travels to the second position point C, if the actual travel information of the train does not meet the target condition, the third position corresponding to the train is determined, and a connection with the second communication module is established at the third position.

[0063] As an optional implementation of the embodiment of the present invention, the second strength condition includes that the communication signal strength of the second communication module reaches a preset first strength threshold and / or the communication signal strength of the second communication module is stronger than the communication signal strength of the first communication module.

[0064] Specifically, the second strength condition may be that the communication signal strength of the second communication module reaches the first strength threshold, the communication signal strength of the second communication module is greater than the communication signal strength of the first communication module, or the communication signal strength of the second communication module reaches the first strength threshold and is greater than the communication signal strength of the first communication module. The communication signal strength of the second communication module reaches the first strength threshold to ensure that the train can establish a connection with the second communication module.

[0065] S204: When the actual travel information of the train meets the target condition, the train establishes a connection with the second communication module at the second position, and sends data to the control center through the first communication module and the second communication module.

[0066] As an optional implementation of an embodiment of the present invention, after sending data to the control center through the first communication module and the second communication module, it also includes: when the train travels to the fourth position, disconnecting from the first communication module, sending data to the control center through the second communication module.

[0067] Specifically, the fourth position may refer to the position of the train when normal communication between the train and the first communication module cannot be performed. Therefore, when the train reaches the fourth position, the train may interrupt the connection with the first communication module and send data to the control center through the second communication module.

[0068] As an optional implementation manner of an embodiment of the present invention, the fourth position includes the position where the train exits the overlapping area of ​​the communication coverage area of ​​the first communication module and the communication coverage area of ​​the second communication module to be switched and / or the position where the communication signal strength of the first communication module is lower than a preset second strength threshold.

[0069] Specifically, refer to Figure 5 The fourth position can be the position of the projection point on the track of the farthest boundary point of the overlapping area (the farthest boundary point of the communication coverage area of ​​the first communication module) after the train leaves the overlapping area between the communication coverage area of ​​the first communication module and the communication coverage area of ​​the second communication module, i.e., the position of point E, along the direction of the train track. Alternatively, the fourth position can be the intersection position of the boundary of the overlapping area and the track when the train leaves the overlapping area. The fourth position can also be the position of the train when the communication signal strength of the first communication module is lower than the preset second strength threshold. When the communication signal strength of the first communication module is lower than the preset second strength threshold, the train and the first communication module cannot communicate normally.

[0070] The technical solution of the embodiment of the present invention is that the control center sends the second position and target conditions corresponding to the train to the train when the train travels to the first position; wherein the train is connected to the control center through the first communication module; the second position is located inside the overlapping area of ​​the communication coverage area of ​​the first communication module and the communication coverage area of ​​the second communication module to be switched, so that the control center determines the position and conditions for the train to execute the communication module switching, improves the accuracy of the switching position determination, thereby improving the efficiency of executing the communication module switching and avoiding the waste of network resources; when the actual driving information of the train does not meet the target conditions, after the train enters the overlapping area of ​​the communication coverage area of ​​the first communication module and the communication coverage area of ​​the second communication module to be switched, the communication signal strength of the first communication module and the second communication module is obtained; at the first communication module and / or Or a communication connection is established between the train and the second communication module at a third position where the communication signal strength of the second communication module meets the preset second strength condition, and data is sent to the control center through the first communication module and the second communication module, thereby realizing that when the actual driving information of the train does not meet the target conditions, the position where the train executes the communication module switching is determined according to the communication signal strength of the first communication module and the second communication module; when the actual driving information of the train meets the target conditions, the train establishes a connection with the second communication module at the second position, and sends data to the control center through the first communication module and the second communication module, thereby realizing redundant transmission of the data after the communication module switching, and being able to send data to the control center through the first communication module and the second communication module at the same time, thereby avoiding communication interruption when the train executes the communication module switching, reducing the risk of data loss, and making the network switching safe and reliable.

[0071] Embodiment 3

[0072] Figure 7 This is a structural diagram of a train communication system provided by Embodiment 3 of the present invention. This embodiment is applicable to the case where communication network switching is performed during the operation of a train. The system can be implemented in the form of hardware and / or software. Figure 7 As shown, the system includes: a control center 301, multiple trains 302 and multiple communication modules 303; the control center 301 transmits data with the trains through the communication modules connected to the trains; wherein,

[0073] The control center 301 is used to send a second position and a target condition corresponding to the train to the train when the train travels to the first position; wherein the train is connected to the control center through a first communication module among the multiple communication modules; the second position is located inside the overlapping area of ​​the communication coverage area of ​​the first communication module and the communication coverage area of ​​the second communication module to be switched;

[0074] The multiple trains 302 are used to establish a connection with a second communication module among the multiple communication modules at a second position when their actual travel information meets the target condition, and send data to the control center through the first communication module and the second communication module.

[0075] The technical solution of the embodiment of the present invention is that when the train travels to the first position, the control center 301 sends the second position and target conditions corresponding to the train to the train; wherein the train is connected to the control center through the first communication module; the second position is located inside the overlapping area of ​​the communication coverage area of ​​the first communication module and the communication coverage area of ​​the second communication module to be switched, so that the position and conditions for the train to execute the communication module switching are determined by the control center, and the accuracy of the switching position determination is improved, thereby improving the efficiency of executing the communication module switching and avoiding the waste of network resources; when the actual driving information of multiple trains 302 meets the target conditions, a connection is established with the second communication module at the second position, and data is sent to the control center through the first communication module and the second communication module, so that redundant transmission of the data after the communication module switching is realized, and data can be sent to the control center through the first communication module and the second communication module at the same time, so as to avoid communication interruption when the train executes the communication module switching, reduce the risk of data loss, and make the network switching safe and reliable.

[0076] Based on any of the above optional technical solutions, optionally, the first position is located inside the communication coverage area of ​​the first communication module and outside the communication coverage area of ​​the second communication module.

[0077] On the basis of any of the above optional technical solutions, optionally, the control center 301 is also used for: before the second position and target conditions corresponding to the train are sent to the train when the train reaches the first position, the control center 301 determines the second communication module corresponding to the train according to the train's driving position and driving route, and obtains the overlapping area between the communication coverage area of ​​the first communication module connected to the train and the communication coverage area of ​​the second communication module; the control center 301 determines the target distance according to the train type and / or driving speed of the train, and determines the position whose distance from the position where the train enters the overlapping area is greater than or equal to the target distance as the first position.

[0078] Based on any of the above-mentioned optional technical solutions, optionally, the control center 301 is also used to: after obtaining the overlapping area between the communication coverage area of ​​the first communication module connected to the train and the communication coverage area of ​​the second communication module, the control center 301 determines the second position corresponding to the train from the multiple candidate positions according to the preset driving information of the train, the expected communication signal strength at multiple candidate positions in the overlapping area, the communication load of the first communication module, and the communication load of the second communication module.

[0079] Based on any of the above-mentioned optional technical solutions, optionally, the target condition includes at least one of the following conditions: the train's running speed is within a preset speed range; the change in the train's running speed within a preset time period is within a preset change range; the train's actual running track is a preset running track; the position deviation between the train's actual running position and the expected running position is within a preset deviation range; the time difference between the train's actual arrival time at the target position and the expected arrival time is within a preset difference range; the communication load of the first communication module and / or the second communication module satisfies the preset load condition; the communication signal strength of the first communication module and / or the second communication module satisfies the preset first strength condition.

[0080] On the basis of any of the above optional technical solutions, optionally, the train communication system of the embodiment of the present invention further includes: a communication signal strength acquisition module and a communication connection establishment module. Among them, the communication signal strength acquisition module is used to obtain the communication signal strength of the first communication module and the second communication module after the control center sends the second position and target conditions corresponding to the train to the train when the train travels to the first position, and when the train's actual travel information does not meet the target conditions, after the train enters the overlapping area of ​​the communication coverage area of ​​the first communication module and the communication coverage area of ​​the second communication module to be switched; the communication connection establishment module is used to establish a communication connection with the second communication module at a third position where the communication signal strength of the first communication module and / or the second communication module meets the preset second strength condition, and send data to the control center through the first communication module and the second communication module.

[0081] Based on any of the above optional technical solutions, optionally, the second strength condition includes that the communication signal strength of the second communication module reaches a preset first strength threshold and / or the communication signal strength of the second communication module is stronger than the communication signal strength of the first communication module.

[0082] Based on any of the above optional technical solutions, optionally, the multiple trains 302 are also used to: after sending data to the control center through the first communication module and the second communication module, when the train travels to the fourth position, disconnect from the first communication module and send data to the control center through the second communication module.

[0083] Based on any of the above optional technical solutions, optionally, the fourth position includes the position where the train exits the overlapping area of ​​the communication coverage area of ​​the first communication module and the communication coverage area of ​​the second communication module to be switched and / or the position where the communication signal strength of the first communication module is lower than a preset second strength threshold.

[0084] The train communication system provided by the embodiment of the present invention can execute the train communication method provided by any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0085] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0086] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A train communication method, characterized in that: The method comprises: When the train travels to the first position, the control center sends the second position corresponding to the train and the target condition to the train; wherein the train is connected to the control center through the first communication module; the second position is located inside the overlapping area of ​​the communication coverage area of ​​the first communication module and the communication coverage area of ​​the second communication module to be switched; When the actual travel information of the train meets the target condition, the train establishes a connection with the second communication module at the second position, and sends data to the control center through the first communication module and the second communication module.

2. The method according to claim 1, characterized in that The first position is located inside a communication coverage area of ​​the first communication module and outside a communication coverage area of ​​the second communication module.

3. The method according to claim 1, characterized in that Before the control center sends the second position and target condition corresponding to the train to the train when the train travels to the first position, the control center further includes: The control center determines the second communication module corresponding to the train according to the driving position and driving route of the train, and obtains the overlapping area between the communication coverage area of ​​the first communication module connected to the train and the communication coverage area of ​​the second communication module; The control center determines a target distance according to the train type and / or the travel speed of the train, and determines a position whose distance from the position where the train enters the overlapping area is greater than or equal to the target distance as the first position.

4. The method according to claim 3, characterized in that After acquiring the overlapping area between the communication coverage area of ​​the first communication module connected to the train and the communication coverage area of ​​the second communication module, the method further includes: The control center determines a second position corresponding to the train from multiple candidate positions based on preset driving information of the train, expected communication signal strengths at multiple candidate positions in the overlapping area, the communication load of the first communication module, and the communication load of the second communication module.

5. The method according to claim 1, characterized in that: The target condition includes at least one of the following conditions: The running speed of the train is within a preset speed range; The variation of the running speed of the train within a preset time period is within a preset variation range; The actual running track of the train is the preset running track; The position deviation between the actual running position and the expected running position of the train is within a preset deviation range; The time difference between the actual arrival time and the expected arrival time of the train at the target location is within a preset difference range; The communication load of the first communication module and / or the second communication module meets a preset load condition; The communication signal strength of the first communication module and / or the second communication module meets a preset first strength condition.

6. The method according to claim 1, characterized in that After the control center sends the second position and target condition corresponding to the train to the train when the train travels to the first position, the method further includes: When actual travel information of the train does not meet the target condition, after the train enters an overlapping area between a communication coverage area of ​​the first communication module and a communication coverage area of ​​the second communication module to be switched, obtaining communication signal strengths of the first communication module and the second communication module; A communication connection is established between the first communication module and / or the second communication module at a third position where the communication signal strength of the first communication module and / or the second communication module meets a preset second strength condition, and data is sent to the control center through the first communication module and the second communication module.

7. The method according to claim 6, characterized in that The second strength condition includes that the communication signal strength of the second communication module reaches a preset first strength threshold and / or the communication signal strength of the second communication module is stronger than the communication signal strength of the first communication module.

8. The method according to claim 1, characterized in that After sending data to the control center through the first communication module and the second communication module, the method further includes: When the train travels to the fourth position, the train disconnects from the first communication module and sends data to the control center through the second communication module.

9. The method according to claim 8, characterized in that The fourth position includes a position where the train exits an overlapping area between a communication coverage area of ​​the first communication module and a communication coverage area of ​​a second communication module to be switched and / or a position where the communication signal strength of the first communication module is lower than a preset second strength threshold.

10. A train communication system, characterized in that: The system includes: a control center, multiple trains and multiple communication modules; the control center transmits data to the trains through the communication modules connected to the trains; wherein, The control center is used to send a second position and target condition corresponding to the train to the train when the train travels to the first position; wherein the train is connected to the control center through a first communication module among a plurality of communication modules; the second position is located inside an overlapping area between a communication coverage area of ​​the first communication module and a communication coverage area of ​​a second communication module to be switched; The train is used to establish a connection with a second communication module among multiple communication modules at the second position when its actual driving information meets the target condition, and send data to the control center through the first communication module and the second communication module.

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