Vehicle-ground LTE wireless network access method, device and equipment, and storage medium

Abstract

Embodiments of the present disclosure provide a train-ground LTE wireless network access method and device, equipment and a storage medium. The method is applied to TAU, comprising: receiving a SIM activation instruction sent by a vehicle controller, wherein the vehicle controller sending the SIM activation instruction comprises: the vehicle controller obtaining position information of the train, and determining the area where the train is located according to the position information, if the area is a main line area, sending the SIM activation instruction corresponding to the main line area to the TAU, if the area where the train is located is a test line area, sending the SIM activation instruction corresponding to the test line area to the TAU; according to the SIM activation instruction, activating the SIM associated with the SIM activation instruction in the TAU, and accessing the train-ground LTE wireless network of the area. In this way, based on the position information of the train, the TAU can automatically select and access the train-ground LTE wireless network of the area where the train is currently located, avoiding mutual interference between the train-ground LTE wireless network of the test line in the vehicle base and the train-ground LTE wireless network of the main line.

Description

Technical Field

[0001] This disclosure relates to the field of rail transit technology, and in particular to a vehicle-to-ground LTE wireless network access method, apparatus, device, and storage medium. Background Technology

[0002] Due to its advantages such as low transmission latency, good mobility support, multi-service concurrency, and strong anti-interference capabilities, Long Term Evolution (LTE) technology has become the main vehicle-to-ground wireless communication technology for Communication-based Train Control (CBTC) systems, and is widely used in new line construction and upgrades of existing lines. However, with the large-scale application of LTE technology, the scarcity of wireless spectrum resources has become prominent, leading to frequent interference between LTE-based vehicle-to-ground wireless networks, especially between the test track and the main line.

[0003] The test track is located within the vehicle depot. Newly purchased trains and overhauled trains must undergo dynamic testing and performance trials on the test track before being put into official operation to verify whether the trains meet the relevant design requirements. Therefore, the test track is equipped with a signal control system that is completely identical to that of the main line. Furthermore, all vehicles used must be able to access the vehicle-to-ground LTE wireless network on both the test track and the main line. To prevent unnecessary impacts on main line operations during the testing process, there are generally certain isolation requirements between the test track and the main line.

[0004] Due to the limited area of ​​the vehicle depot, the physical distance between the test track and the mainline is finite, inevitably leading to interference between the vehicle-to-ground LTE wireless networks on the test track and the mainline, causing a decrease in network transmission performance or even interruption in both areas. Therefore, how to avoid mutual interference between the vehicle-to-ground LTE wireless networks on the test track and the mainline within the vehicle depot has become an urgent technical problem to be solved. Summary of the Invention

[0005] Embodiments of this disclosure provide a vehicle-to-ground LTE wireless network access method, apparatus, device, and storage medium.

[0006] In a first aspect, embodiments of this disclosure provide a vehicle-to-ground LTE wireless network access method, which is applied to a Train Access Unit (TAU) and includes:

[0007] The system receives a Subscriber Identity Module (SIM) activation command sent by the onboard controller. The SIM activation command sent by the onboard controller includes: the onboard controller obtaining the train's location information and determining the area where the train is located based on the location information; if the area is the mainline area, the system sends a SIM activation command corresponding to the mainline area to the TAU; if the area where the train is located is the test track area, the system sends a SIM activation command corresponding to the test track area to the TAU.

[0008] According to the SIM activation command, activate the SIM associated with the area corresponding to the SIM activation command in the TAU and access the vehicle-to-ground LTE wireless network of the area.

[0009] In some possible implementations of the first aspect, in the event of a failure to acquire location information, the SIM activation command sent by the vehicle controller is the SIM activation command corresponding to the mainline area.

[0010] In some possible implementations of the first aspect, the vehicle-to-ground LTE wireless network includes: a vehicle-to-ground LTE access network and a vehicle-to-ground LTE core network;

[0011] According to the SIM activation command, activate the SIM associated with the area corresponding to the SIM activation command in the TAU, and access the vehicle-to-ground LTE wireless network of the area, including:

[0012] According to the SIM activation instruction, activate the SIM associated with the region corresponding to the SIM activation instruction in the TAU and obtain the SIM's International Mobile Subscriber Identification Number (IMSI);

[0013] The SIM's IMSI is compared with the IMSI stored in the Home Subscriber Server (HSS) network element of the vehicle-to-ground LTE core network in the region;

[0014] If the stored IMSI contains the SIM's IMSI, then the vehicle-to-ground LTE access network of the access area is available.

[0015] In some possible implementations of the first aspect, the IMSI of the SIM associated with the mainline area in the TAU is stored in the HSS network element of the vehicle-to-ground LTE core network in the mainline area; the IMSI of the SIM associated with the test track area in the TAU is stored in the HSS network element of the vehicle-to-ground LTE core network in the test track area.

[0016] In some possible implementations of the first aspect, according to the SIM activation instruction, the SIM associated with the area corresponding to the SIM activation instruction in the TAU is activated, and the vehicle-to-ground LTE wireless network of the area is accessed, including:

[0017] If the SIM activation command is the first SIM activation command received by the TAU in this power-on cycle, then the SIM activation command is stored, and the SIM associated with the area corresponding to the SIM activation command in the TAU is activated according to the SIM activation command, and the vehicle-to-ground LTE wireless network of the area is accessed.

[0018] If the SIM activation command is not the first SIM activation command received by the TAU in this power-on cycle, and the SIM activation command is inconsistent with the stored SIM activation command, then the stored SIM activation command is deleted, and the new SIM activation command is stored. Based on the SIM activation command, the SIM associated with the area corresponding to the SIM activation command in the TAU is activated, other SIMs are stopped from being activated, and the vehicle-to-ground LTE wireless network of the access area is established.

[0019] Among some possible implementations of the first aspect, the method also includes:

[0020] When TAU restarts, delete the stored SIM activation instructions.

[0021] In some possible implementations of the first aspect, the SIM is either a hardware SIM or a virtual SIM.

[0022] Secondly, embodiments of this disclosure provide a vehicle-to-ground LTE wireless network access device, which is applied to a TAU and includes:

[0023] The receiving module is used to receive the SIM activation command sent by the vehicle controller. The SIM activation command sent by the vehicle controller includes: the vehicle controller obtains the location information of the train and determines the area where the train is located based on the location information. If the area is the main line area, the vehicle controller sends the SIM activation command corresponding to the main line area to the TAU. If the area where the train is located is the test track area, the vehicle controller sends the SIM activation command corresponding to the test track area to the TAU.

[0024] The activation module is used to activate the SIM associated with the area corresponding to the SIM activation command in the TAU according to the SIM activation command, and access the vehicle-to-ground LTE wireless network of the area.

[0025] Thirdly, embodiments of this disclosure provide an electronic device comprising: at least one processor; and a memory communicatively connected to the at least one processor; the memory storing instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform the methods described above.

[0026] Fourthly, embodiments of this disclosure provide a non-transitory computer-readable storage medium storing computer instructions for causing a computer to perform the methods described above.

[0027] In the embodiments of this disclosure, the TAU can automatically select and access the vehicle-to-ground LTE wireless network in the area where the train is currently located based on the train's location information. This avoids mutual interference between the vehicle-to-ground LTE wireless network of the test track and the vehicle-to-ground LTE wireless network of the main line within the vehicle depot, achieving complete independence of the test track and simplifying the wireless debugging process of the test track during engineering implementation.

[0028] It should be understood that the description in the Summary of the Invention is not intended to limit the key or essential features of the embodiments of this disclosure, nor is it intended to restrict the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0029] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. The drawings are provided for a better understanding of the invention and are not intended to limit the scope of this disclosure. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein:

[0030] Figure 1 A schematic diagram of an exemplary operating environment in which embodiments of the present disclosure can be implemented is shown;

[0031] Figure 2 A flowchart illustrating a vehicle-to-ground LTE wireless network access method provided by an embodiment of this disclosure is shown;

[0032] Figure 3 A flowchart illustrating the operation of an on-board controller provided by an embodiment of this disclosure is shown;

[0033] Figure 4 A TAU workflow diagram provided by an embodiment of this disclosure is shown;

[0034] Figure 5 A structural diagram of a vehicle-to-ground LTE wireless network access device provided in an embodiment of this disclosure is shown;

[0035] Figure 6 A structural diagram of an exemplary electronic device capable of implementing embodiments of the present disclosure is shown. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0037] Furthermore, the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0038] To address the problems in the background art, embodiments of this disclosure provide a vehicle-to-ground LTE wireless network access method, apparatus, device, and storage medium. Specifically, the onboard controller acquires the train's location information and determines the area where the train is located based on the location information. If the area is a mainline area, it sends a SIM activation command corresponding to the mainline area to the TAU; if the area is a test track area, it sends a SIM activation command corresponding to the test track area to the TAU. The TAU receives the SIM activation command sent by the onboard controller and, according to the SIM activation command, activates the SIM associated with the area corresponding to the SIM activation command in the TAU, thereby accessing the vehicle-to-ground LTE wireless network in the area.

[0039] In this way, based on the train's location information, the TAU can automatically select and connect to the train-to-ground LTE wireless network in the area where the train is currently located, avoiding mutual interference between the train-to-ground LTE wireless network on the test track and the train-to-ground LTE wireless network on the main line within the vehicle depot, achieving complete independence of the test track, and simplifying the wireless debugging process of the test track during the project implementation.

[0040] The vehicle-to-ground LTE wireless network access method, apparatus, device, and storage medium provided in this disclosure will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] Figure 1 A schematic diagram of an exemplary operating environment in which embodiments of the present disclosure can be implemented is shown, such as... Figure 1 As shown, the operating environment 100 may include: an on-board controller and a TAU, which are interconnected.

[0042] Figure 2 A flowchart illustrating a vehicle-to-ground LTE wireless network access method provided by an embodiment of this disclosure is shown, such as... Figure 2As shown, the vehicle-to-ground LTE wireless network access method 200 can be applied to the above-mentioned operating environment 100, and includes the following steps:

[0043] S210, the on-board controller obtains the train's location information and determines the area where the train is located based on the location information.

[0044] For example, the on-board controller can obtain the train's location information (e.g., GPS positioning information) through an internal positioning module (e.g., a GPS positioning module), and determine the area where the train is located based on the location information, that is, whether the train is in the mainline area or the test track area.

[0045] S220: If the area is a mainline area, the onboard controller sends a SIM activation command corresponding to the mainline area to the TAU; if the area is a test track area, the onboard controller sends a SIM activation command corresponding to the test track area to the TAU.

[0046] Understandably, if location information acquisition fails (e.g., positioning failure or loss of train location), the onboard controller can send a SIM activation command corresponding to the mainline area to the TAU.

[0047] In this way, it can be ensured that the train can access the train-to-ground LTE wireless network in the main line area when the train's location is unknown, thereby enabling train-to-ground LTE wireless network access in case of emergencies and ensuring the safe operation of the train.

[0048] As an example, SIM activation instructions can be sent continuously, without any restrictions.

[0049] S230, the TAU receives the SIM activation command sent by the vehicle controller, and activates the SIM associated with the area corresponding to the SIM activation command in the TAU according to the SIM activation command, and accesses the vehicle-to-ground LTE wireless network of the area.

[0050] In some embodiments, if the currently received SIM activation command is the first SIM activation command received by the TAU in this power-on cycle, the TAU stores the SIM activation command and activates the SIM in the TAU associated with the area corresponding to the SIM activation command, thereby accessing the vehicle-to-ground LTE wireless network in that area. For example, if the SIM activation command is for the mainline area, the SIM in the TAU associated with the mainline area is activated, and the vehicle-to-ground LTE wireless network in the mainline area is accessed; if the SIM activation command is for the test track area, the SIM in the TAU associated with the test track area is activated, and the vehicle-to-ground LTE wireless network in the test track area is accessed.

[0051] If the currently received SIM activation command is not the first SIM activation command received by the TAU in this power-on cycle, and the SIM activation command is inconsistent with the stored SIM activation command, then the TAU deletes the stored SIM activation command, stores the currently received SIM activation command, activates the SIM associated with the area corresponding to the SIM activation command in the TAU according to the currently received SIM activation command, stops activating other SIMs, and accesses the vehicle-to-ground LTE wireless network in that area.

[0052] In other words, within the same power-on operating cycle, when the TAU receives the first SIM activation command, it stores the command and activates the corresponding SIM according to it, thereby accessing the vehicle-to-ground LTE wireless network in the corresponding area. Afterward, the TAU can only replace the stored SIM activation command with the new one upon receiving a different SIM activation command, activating the corresponding SIM according to the latest command and stopping the activation of other activated SIMs, thus accessing the vehicle-to-ground LTE wireless network in the corresponding area. Correspondingly, when the TAU restarts, i.e., when starting a new power-on operating cycle, it can delete the stored SIM activation commands.

[0053] In this way, only the SIM corresponding to the area where the train is currently located can be activated during the power-on working cycle, thereby connecting to the train-to-ground LTE wireless network in the area where the train is currently located, effectively avoiding network interference.

[0054] It is important to note that the vehicle-to-ground LTE wireless network can include a vehicle-to-ground LTE access network and a vehicle-to-ground LTE core network. When activating a SIM, the TAU can activate the SIM associated with the area corresponding to the SIM activation command, obtain the SIM's IMSI, and compare it with the IMSI stored in the HSS network element of the vehicle-to-ground LTE core network in that area. If the IMSI of the SIM exists in the stored IMSIs, then the user can access the vehicle-to-ground LTE access network in that area.

[0055] In this way, the train can autonomously identify and access the train-to-ground LTE wireless network in the area where the train is currently located, based on the IMSI of the SIM associated with the corresponding area and the IMSI stored in the HSS network element of the train-to-ground LTE core network in the corresponding area, effectively avoiding network interference.

[0056] As an example, the IMSI of the SIM associated with the mainline area in the TAU is stored in the HSS network element of the vehicle-to-ground LTE core network in the mainline area; the IMSI of the SIM associated with the test track area in the TAU is stored in the HSS network element of the vehicle-to-ground LTE core network in the test track area.

[0057] For example, the TAU has two SIMs. One SIM is associated with the main line area, and the IMSI of the SIM associated with the main line area is stored in the HSS network element of the vehicle-to-ground LTE core network in the main line area. The other SIM is associated with the test track area, and the IMSI of the SIM associated with the test track area is stored in the HSS network element of the vehicle-to-ground LTE core network in the test track area.

[0058] In this way, the user ownership information of the vehicle-to-ground LTE access network in the main line area and the test line area can be ensured to be independent of each other.

[0059] Understandably, the IMSIs of the two SIMs in the TAU can be obtained in advance, one of the SIMs can be associated with the main line area, and the IMSI of the SIM associated with the main line area can be stored in the HSS network element of the vehicle-to-ground LTE core network of the main line area; the other SIM can be associated with the test track area, and the IMSI of the SIM associated with the test track area can be stored in the HSS network element of the vehicle-to-ground LTE core network of the test track area.

[0060] In the embodiments of this disclosure, the TAU can automatically select and access the vehicle-to-ground LTE wireless network in the area where the train is currently located based on the train's location information. This avoids mutual interference between the vehicle-to-ground LTE wireless network of the test track and the vehicle-to-ground LTE wireless network of the main line within the vehicle depot, achieving complete independence of the test track and simplifying the wireless debugging process of the test track during engineering implementation.

[0061] It is worth noting that, in order to improve versatility, the SIM mentioned above can be a hardware SIM or a virtual SIM, and there are no restrictions here.

[0062] The vehicle-to-ground LTE wireless network access method provided by this disclosure will be described in detail below with reference to a specific embodiment:

[0063] Figure 3 A flowchart illustrating the operation of an on-board controller according to an embodiment of this disclosure is shown, such as... Figure 3 As shown, it includes the following steps:

[0064] S310 obtains the train's location information through its internal positioning module.

[0065] S320: Determine whether the location information acquisition was successful. If successful, proceed to S330; otherwise, terminate.

[0066] S330 determines the area where the train is located based on location information.

[0067] S340: Determine if the current area is a positive line area. If it is a positive line area, execute S350; otherwise, execute S360.

[0068] S350 continuously sends the SIM activation command corresponding to the mainline area to TAU, i.e., the mainline area SIM activation command.

[0069] S360: Determine if the current area is a test track area. If it is a test track area, execute S370; otherwise, end the process.

[0070] S370 continuously sends the SIM activation command corresponding to the test track area to TAU, i.e., the test track area SIM activation command.

[0071] Figure 4 A TAU workflow diagram provided by an embodiment of this disclosure is shown, such as Figure 4 As shown, it includes the following steps:

[0072] S410 determines whether to restart. If restarting is required, proceed to S420; otherwise, proceed to S430.

[0073] S420, delete the stored SIM activation command.

[0074] S430 receives the SIM activation command sent by the vehicle controller.

[0075] S440: Determine whether the currently received SIM activation command is the first SIM activation command. If yes, execute S450; otherwise, execute S480.

[0076] S450 stores the currently received SIM activation command.

[0077] S460, according to the SIM activation instruction, activate the SIM in the TAU associated with the area corresponding to the SIM activation instruction, and obtain the IMSI of the SIM.

[0078] S470: Compare the IMSI of the SIM with the IMSI stored in the HSS network element of the vehicle-to-ground LTE core network in the area. If the IMSI of the SIM exists in the stored IMSI, then access the vehicle-to-ground LTE access network in the area.

[0079] S480: Determine whether the currently received SIM activation command is consistent with the stored SIM activation command. If they are consistent, the process ends; otherwise, proceed to S490.

[0080] S490: Delete the stored SIM activation command and store the currently received SIM activation command, then execute S460.

[0081] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this disclosure is not limited to the described order of actions, because according to this disclosure, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to this disclosure.

[0082] The above is an introduction to the method embodiments. The following describes the solution described in this disclosure further through device embodiments.

[0083] Figure 5 A structural diagram of a vehicle-to-ground LTE wireless network access device according to an embodiment of this disclosure is shown, such as... Figure 5 As shown, the vehicle-to-ground LTE wireless network access device 500 can be applied to Figure 1 The TAU shown includes:

[0084] The receiving module 510 is used to receive a SIM activation command sent by the vehicle controller. The SIM activation command sent by the vehicle controller includes: the vehicle controller acquiring the location information of the train and determining the area where the train is located based on the location information; if the area is the mainline area, the vehicle controller sends a SIM activation command corresponding to the mainline area to the TAU; if the area where the train is located is the test track area, the vehicle controller sends a SIM activation command corresponding to the test track area to the TAU.

[0085] The activation module 520 is used to activate the SIM in the TAU associated with the area corresponding to the SIM activation instruction according to the SIM activation instruction, and access the vehicle-to-ground LTE wireless network of the area.

[0086] In some embodiments, if the location information acquisition fails, the SIM activation command sent by the vehicle controller is the SIM activation command corresponding to the main line area.

[0087] In some embodiments, the vehicle-to-ground LTE wireless network includes: a vehicle-to-ground LTE access network and a vehicle-to-ground LTE core network;

[0088] Activation module 520 is specifically used for:

[0089] According to the SIM activation instruction, activate the SIM in the TAU associated with the region corresponding to the SIM activation instruction, and obtain the International Mobile Subscriber Identity (IMSI) of the SIM;

[0090] The IMSI of the SIM is compared with the IMSI stored in the Home Subscriber Server (HSS) network element of the vehicle-to-ground LTE core network in the region.

[0091] If the IMSI of the SIM exists in the stored IMSIs, then the vehicle-to-ground LTE access network of the area is accessed.

[0092] In some embodiments, the IMSI of the SIM associated with the mainline area in the TAU is stored in the HSS network element of the vehicle-to-ground LTE core network in the mainline area; the IMSI of the SIM associated with the test track area in the TAU is stored in the HSS network element of the vehicle-to-ground LTE core network in the test track area.

[0093] In some embodiments, the activation module 520 is specifically used for:

[0094] If the SIM activation instruction is the first SIM activation instruction received by the TAU in this power-on cycle, then the SIM activation instruction is stored, and according to the SIM activation instruction, the SIM associated with the area corresponding to the SIM activation instruction in the TAU is activated to access the vehicle-to-ground LTE wireless network of the area.

[0095] If the SIM activation command is not the first SIM activation command received by the TAU in this power-on cycle, and the SIM activation command is inconsistent with the stored SIM activation command, then the stored SIM activation command is deleted, and the SIM activation command is stored. According to the SIM activation command, the SIM associated with the area corresponding to the SIM activation command in the TAU is activated, other SIMs are stopped from being activated, and the vehicle-to-ground LTE wireless network in the area is accessed.

[0096] In some embodiments, the vehicle-to-ground LTE wireless network access device 500 further includes:

[0097] The deletion module is used to delete stored SIM activation instructions when the TAU restarts.

[0098] In some embodiments, the SIM is a hardware SIM or a virtual SIM.

[0099] Understandable, Figure 5 Each module / unit in the vehicle-to-ground LTE wireless network access device 500 shown has the ability to implement Figure 2 The functions of each step in the vehicle-to-ground LTE wireless network access method 200 shown, and the corresponding technical effects they achieve, will not be elaborated here for the sake of brevity.

[0100] Figure 6A structural diagram of an exemplary electronic device capable of implementing embodiments of the present disclosure is shown. Electronic device 600 is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. Electronic device 600 may also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the present disclosure described and / or claimed herein.

[0101] like Figure 6 As shown, the electronic device 600 may include a computing unit 601, which can perform various appropriate actions and processes according to a computer program stored in a read-only memory (ROM) 602 or a computer program loaded from a storage unit 608 into a random access memory (RAM) 603. The RAM 603 may also store various programs and data required for the operation of the electronic device 600. The computing unit 601, ROM 602, and RAM 603 are interconnected via a bus 604. An input / output (I / O) interface 605 is also connected to the bus 604.

[0102] Multiple components in electronic device 600 are connected to I / O interface 605, including: input unit 606, such as keyboard, mouse, etc.; output unit 607, such as various types of displays, speakers, etc.; storage unit 608, such as disk, optical disk, etc.; and communication unit 609, such as network card, modem, wireless transceiver, etc. Communication unit 609 allows electronic device 600 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0103] The computing unit 601 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of the computing unit 601 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various computing units running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. The computing unit 601 performs the various methods and processes described above, such as method 200. For example, in some embodiments, method 200 may be implemented as a computer program product, including a computer program tangibly contained in a computer-readable medium, such as storage unit 608. In some embodiments, part or all of the computer program may be loaded and / or installed on device 600 via ROM 602 and / or communication unit 609. When the computer program is loaded into RAM 603 and executed by the computing unit 601, one or more steps of method 200 described above may be performed. Alternatively, in other embodiments, the computing unit 601 may be configured to perform method 200 by any other suitable means (e.g., by means of firmware).

[0104] The various embodiments described above can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), system-on-a-chip (SoCs), payload programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0105] The program code used to implement the methods of this disclosure may be written in any combination of one or more programming languages. This program code may be provided to a processor or controller of a general-purpose computer, special-purpose computer, or other programmable data processing apparatus, such that when executed by the processor or controller, the program code causes the functions / operations specified in the flowcharts and / or block diagrams to be implemented. The program code may be executed entirely on a machine, partially on a machine, as a standalone software package partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0106] In the context of this disclosure, a computer-readable medium can be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. A computer-readable medium can be, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. More specific examples of computer-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0107] It should be noted that this disclosure also provides a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to cause a computer to execute method 200 and achieve the corresponding technical effects achieved by the embodiments of this disclosure in executing the method. For the sake of brevity, further details are omitted here.

[0108] In addition, this disclosure also provides a computer program product including a computer program that implements method 200 when executed by a processor.

[0109] To provide interaction with a user, the embodiments described above can be implemented on a computer having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the computer. Other types of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0110] The embodiments described above can be implemented in computing systems that include backend components (e.g., as a data server), or computing systems that include middleware components (e.g., an application server), or computing systems that include frontend components (e.g., a user computer with a graphical user interface or web browser through which a user can interact with the implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication (e.g., a communication network) of any form or medium. Examples of communication networks include local area networks (LANs), wide area networks (WANs), and the Internet.

[0111] Computer systems can include clients and servers. Clients and servers are generally located far apart and typically interact via communication networks. Client-server relationships are created by computer programs running on the respective computers and having a client-server relationship with each other. Servers can be cloud servers, servers in distributed systems, or servers incorporating blockchain technology.

[0112] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this disclosure can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this disclosure can be achieved, and this is not limited herein.

[0113] The specific embodiments described above do not constitute a limitation on the scope of protection of this disclosure. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A method for accessing a long term evolution (LTE) wireless network from a vehicle, the method comprising: The method is applied to a train access unit (TAU), and comprises the following steps: receiving a user identity module (SIM) activation instruction sent by a train controller, wherein the train controller sends the SIM activation instruction by the following steps: acquiring position information of a train, determining a region where the train is located according to the position information, if the region is a main line region, sending a SIM activation instruction corresponding to the main line region to the TAU, and if the region is a test line region, sending a SIM activation instruction corresponding to the test line region to the TAU; activating, according to the SIM activation instruction, a SIM associated with a region corresponding to the SIM activation instruction in the TAU, and accessing a train-ground LTE wireless network in the region; the step of activating, according to the SIM activation instruction, the SIM associated with the region corresponding to the SIM activation instruction in the TAU, and accessing the train-ground LTE wireless network in the region comprises the following steps: if the SIM activation instruction is a first SIM activation instruction received by the TAU in a current power-on cycle, storing the SIM activation instruction, and activating, according to the SIM activation instruction, the SIM associated with the region corresponding to the SIM activation instruction in the TAU, and accessing the train-ground LTE wireless network in the region; if the SIM activation instruction is not the first SIM activation instruction received by the TAU in the current power-on cycle, and the SIM activation instruction is inconsistent with a stored SIM activation instruction, deleting the stored SIM activation instruction, storing the SIM activation instruction, activating, according to the SIM activation instruction, the SIM associated with the region corresponding to the SIM activation instruction in the TAU, stopping activating other SIMs, and accessing the train-ground LTE wireless network in the region; the train-ground LTE wireless network comprises a train-ground LTE access network and a train-ground LTE core network; the step of activating, according to the SIM activation instruction, the SIM associated with the region corresponding to the SIM activation instruction in the TAU, and accessing the train-ground LTE wireless network in the region comprises the following steps: activating, according to the SIM activation instruction, the SIM associated with the region corresponding to the SIM activation instruction in the TAU, and acquiring an international mobile subscriber identity (IMSI) of the SIM; comparing the IMSI of the SIM with an IMSI stored in a home subscriber server (HSS) network element of the train-ground LTE core network in the region; if the IMSI of the SIM exists in the stored IMSI, accessing the train-ground LTE access network in the region; an IMSI of a SIM associated with the main line region in the TAU is stored in a HSS network element of the train-ground LTE core network in the main line region, and an IMSI of a SIM associated with the test line region in the TAU is stored in a HSS network element of the train-ground LTE core network in the test line region.

2. The method of claim 1, wherein, in the case that the position information acquisition fails, the SIM activation instruction sent by the train controller is a SIM activation instruction corresponding to the main line region.

3. The method of claim 1, wherein, the method further comprises the following steps: when the TAU is restarted, deleting the stored SIM activation instruction.

4. The method according to any one of claims 1 to 3, characterized in that, The SIM is a hardware SIM or a virtual SIM.

5. A vehicle-to-ground LTE wireless network access device, characterized by comprising: The device is applied to TAU, and comprises: A receiving module, configured to receive a SIM (Subscriber Identity Module) activation instruction sent by a vehicle-mounted controller, wherein the vehicle-mounted controller sends the SIM activation instruction by: acquiring position information of a train, determining a region where the train is located according to the position information, sending a SIM activation instruction corresponding to a main line region to the TAU if the region where the train is located is the main line region, and sending a SIM activation instruction corresponding to a test line region to the TAU if the region where the train is located is the test line region; An activating module, configured to activate, according to the SIM activation instruction, a SIM associated with a region corresponding to the SIM activation instruction in the TAU, and access a train-ground LTE wireless network in the region. The activating module is specifically configured to: If the SIM activation instruction is a first SIM activation instruction received by the TAU in a current power-on cycle, store the SIM activation instruction, activate, according to the SIM activation instruction, a SIM associated with a region corresponding to the SIM activation instruction in the TAU, and access a train-ground LTE wireless network in the region; If the SIM activation instruction is not a first SIM activation instruction received by the TAU in the current power-on cycle, and the SIM activation instruction is inconsistent with a stored SIM activation instruction, delete the stored SIM activation instruction, store the SIM activation instruction, activate, according to the SIM activation instruction, a SIM associated with a region corresponding to the SIM activation instruction in the TAU, stop activating other SIMs, and access a train-ground LTE wireless network in the region. The train-ground LTE wireless network comprises a train-ground LTE access network and a train-ground LTE core network. The activating module is specifically configured to: Activate, according to the SIM activation instruction, a SIM associated with a region corresponding to the SIM activation instruction in the TAU, and acquire an IMSI (International Mobile Subscriber Identity) of the SIM. Compare the IMSI of the SIM with an IMSI stored in a HSS (Home Subscriber Server) network element of a train-ground LTE core network of the region. If the IMSI of the SIM exists in the stored IMSI, access a train-ground LTE access network in the region. An IMSI of a SIM associated with a main line region in the TAU is stored in a HSS network element of a train-ground LTE core network of the main line region, and an IMSI of a SIM associated with a test line region in the TAU is stored in a HSS network element of a train-ground LTE core network of the test line region.

6. An electronic device, comprising: The electronic device comprises: at least one processor; and a memory connected with the at least one processor in communication; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method in any one of claims 1-4.

7. A non-transitory computer-readable storage medium having stored thereon computer instructions, wherein, The computer instructions are used to enable a computer to perform the method in any one of claims 1-4.

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