Method for improving reloading speed through distributed storage of LKJ vehicle-mounted basic data

Abstract

According to the method for improving the reloading speed through distributed storage of LKJ vehicle-mounted basic data, the problem that the data reloading speed is low in the traditional wireless reloading process is solved, a vehicle-mounted wireless reloading system is in communication connection with a train operation monitoring and recording system, communication connection with a ground system is achieved under the control of the train operation monitoring and recording system, and the data reloading speed is increased. The external network server is in communication connection with the vehicle-mounted wireless reloading system through a public wireless communication network; the data storage unit is used for storing a to-be-reloaded vehicle-mounted data file, and the to-be-reloaded vehicle-mounted data file is encrypted before wireless reloading and then is transmitted to the data storage unit through the railway mobile data transmission unified platform; the ground system generates a reloading instruction set and an information set for decrypting the vehicle-mounted data file according to conditions; after receiving the reloading instruction, the locomotive downloads a vehicle-mounted basic data file from the external network communication server or other appointed locomotives; and the locomotive decrypts and verifies the downloaded data file by using the received decryption information.

Description

Technical Field

[0001] The present invention relates to the field of train onboard data replacement, and in particular to a method for distributed storage of LKJ onboard basic data to improve replacement speed. Background Art

[0002] As the core equipment of China's train operation control system, LKJ2000 plays a vital role in ensuring the safe operation of trains and improving the operating ability of crew members. The system pre-stores LKJ on-board basic data (including operation organization data and line facility parameters, etc.) as a basis for monitoring, and uses advanced display technology to achieve efficient information interaction with the driver. Due to the frequent reconstruction and construction of conventional railway lines, the number of replacements of LKJ on-board basic data files is also relatively large. According to statistics, in 2022, the entire railway will replace the LKJ basic data file version 1,197 times and replace 304,860 locomotives.

[0003] Although the LKJ on-board basic data file replacement has been upgraded from a manual method to a remote wireless replacement method, the high replacement frequency, large data files and narrow internal and external network penetration bandwidth provided by the MTUP channel have caused the LKJ on-board basic data file replacement efficiency to be low, limiting the rapid turnover of my country's railway locomotives.

[0004] Specifically, with the continuous growth of the volume of LKJ on-board basic data files, it has now reached about 7M bytes per unit. In the application scenario where the railway bureau carries out large-scale replacement of LKJ on-board basic data, for example, with 1,000 locomotives, the replacement speed of LKJ on-board basic data is slow, which seriously affects the replacement efficiency and the timeliness of train operation.

[0005] At present, the on-board basic data wireless replacement technology adopted by LKJ2000 mainly relies on public network communication (such as 4G or 5G) for remote updating. Every time the LKJ on-board basic data is replaced, each locomotive that needs to replace the LKJ on-board basic data file needs to exchange data through the MTUP channel. Assuming that a railway bureau has 1,000 locomotives, the size of the LKJ on-board basic data file is 7M bytes. In addition to the protection data specified by the vehicle-ground transmission protocol, only 1000×7=7000M bytes of valid data penetrate MTUP. Due to the limited bandwidth service provided by MTUP, only 20 locomotives can be concurrently used each time the LKJ on-board basic data file is replaced. This significantly increases the burden on the MTUP channel and reduces its processing efficiency, resulting in a slow data replacement speed, which seriously affects the replacement efficiency and the timeliness of train operation. Summary of the invention

[0006] In view of the above problems, the purpose of the present invention is to provide a method for distributed storage of LKJ vehicle-mounted basic data to improve the speed of changing, so as to solve the problem of slow data changing speed during traditional wireless changing.

[0007] The technical solution is that it includes a train operation monitoring and recording system and an on-board wireless changing system, wherein the on-board wireless changing system is connected to the train operation monitoring and recording system in communication, and is connected to a ground system under the control of the train operation monitoring and recording system, wherein the ground system includes an external network server, a railway mobile data transmission unified platform, and an internal network server, and the external network server is connected to the on-board wireless changing system in communication through a public wireless communication network;

[0008] It also includes a data storage unit located at the external network server or the vehicle-mounted device, the data storage unit is used to store the vehicle-mounted data file to be replaced, and the vehicle-mounted data file to be replaced is encrypted and transmitted to the data storage unit by the railway mobile data transmission unified platform before wireless replacement;

[0009] The ground system generates a reloading instruction set and an information set for decrypting the vehicle-mounted data file according to conditions;

[0010] When wireless refitting is performed, after receiving the refitting instruction, the locomotive downloads the onboard basic data file from the external network communication server or other designated locomotives according to the information in the instruction;

[0011] The locomotive decrypts and verifies the downloaded data file using the received decryption information.

[0012] In the above or some embodiments, the vehicle-mounted data file to be replaced is

[0013] The Rivest-Shamir-Adleman asymmetric encryption technology uses a pair of keys for encryption and decryption; the vehicle-mounted data file to be replaced is encrypted using a public key, and the private key is the information set used for decryption.

[0014] In the above or some embodiments, data integrity verification is also included when performing data decryption.

[0015] In the above or some embodiments, when performing data integrity verification, digital signatures and timestamps may be used as data integrity verification means.

[0016] The present invention performs only one MTUP channel penetration operation on the LKJ vehicle-mounted basic data file to be replaced. In this process, the data file is safely and efficiently transmitted from the railway intranet to the external network environment and stored in the designated locomotive or external network communication server. This strategy avoids the burden of frequently penetrating the MTUP channel in the traditional method, and significantly improves the efficiency and stability of data transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the system of the present invention.

[0018] Figure 2 It is a schematic diagram of LKJ2000 and LKJ wireless dressing system in one embodiment. DETAILED DESCRIPTION

[0019] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of the present invention, “plurality” means two or more than two, unless otherwise clearly and specifically defined.

[0021] The train operation monitoring and recording system is included. In one embodiment, the train operation monitoring and recording system is LKJ2000, including LKJ2000 host, LKJ screen display at end I, and LKJ screen display at end II. The LKJ2000 host is connected to LKJ screen display at end I and LKJ screen display at end II via CAN bus communication. The LKJ2000 host is the core unit of the system, which mainly performs speed measurement, distance measurement, monitoring logic judgment, brake calculation and monitoring control functions, locomotive operation parameter recording and temporary storage, file dumping and sending, etc. The LKJ screen display is mainly used for better information exchange between LKJ2000 and the driver. It displays the actual operating speed trajectory curve and the mode limit speed (or line allowed speed) curve in a scrolling manner, and uses graphics, symbols, and Chinese characters to display the location, type, and curves, ramps, bridges, tunnels, and crossings of the ground signal, as well as information such as operating line curves, ramps, bridges, tunnels, and crossings. At the same time, it can display the guiding optimized operating speed curve and the handle level curve to prompt or guide the crew's operation. The I-end screen display is installed in the I-end driver's cab, and the II-end screen display is installed in the II-end driver's cab.

[0022] It also includes a vehicle-mounted wireless refitting system, which is connected to the train operation monitoring and recording system. The LKJ wireless remote refitting device mainly realizes the LKJ vehicle-mounted basic data wireless remote refitting function. It mainly interacts with the ground system through the public network communication (such as 4G or 5G) transmission channel; then temporarily stores the received data files; and realizes the LKJ vehicle-mounted basic data refitting through ground command control.

[0023] The present invention performs only one MTUP (Mobile Transmission Unified Platform) channel penetration operation on the LKJ on-board basic data file to be replaced. In this process, the data file is safely and efficiently transmitted from the railway intranet to the external network environment, and is stored on the designated locomotive or external network communication server. This strategy avoids the burden brought by frequent penetration of the MTUP channel in traditional methods, and significantly improves the efficiency and stability of data transmission. During the data transmission process, the railway dedicated network is only responsible for sending the LKJ on-board basic data file replacement instructions, keys and data verification codes to the target locomotive. This design eliminates the need for the railway dedicated network to directly transmit a large number of data files, thereby effectively reducing its burden.

[0024] At the same time, the sending of the key and data verification code ensures that the locomotive can decrypt and accurately verify the data after receiving the data file, further ensuring the integrity and security of the data.

[0025] The present invention makes full use of the high-speed transmission capacity of the public network to achieve the rapid distribution of LKJ vehicle-mounted basic data files to each locomotive in the external network environment. By optimizing the data transmission protocol and routing strategy, the efficient transmission of data in the external network is ensured, thereby significantly improving the speed of data replacement.

[0026] Although the data files are transmitted in an external network environment, the present invention uses a pair of keys (public key and private key) for encryption and decryption by adopting advanced RSA (Rivest-Shamir-Adleman) asymmetric encryption technology. The public key is used for encryption and the private key is used for decryption, which provides higher security and can effectively prevent the risk of data being leaked or tampered with during transmission. At the same time, a cyclic redundancy check (CRC) mechanism is adopted, which is based on the principle of binary division and generates a check code through polynomial division, which can detect and correct multi-bit errors. After receiving the data file, the locomotive can perform accurate verification and authentication, and at the same time, digital signatures, timestamps and other technologies are used to protect the integrity of the data, thereby ensuring the integrity of the data.

[0027] Step 1: Data preparation and verification

[0028] First, in the railway intranet environment, the LKJ vehicle basic data file to be replaced is generated. To ensure the accuracy and integrity of the data, a double verification mechanism is adopted, that is, two independent verification operations are performed on the data file to minimize the possibility of data errors.

[0029] Step 2: Single-pass transmission of data files

[0030] The LKJ vehicle-mounted basic data files that have been double-checked are transmitted to an external network communication server that serves as a relay through the MTUP channel at one time. In this step, we fully utilized the security and stability of the MTUP channel to ensure the security and integrity of the data files during the transmission process. At the same time, since only one penetration transmission is performed, we effectively reduce the burden on the MTUP channel and improve the efficiency of data transmission.

[0031] Step 3: Sending the reinstallation instruction, key and verification code

[0032] While the data file is being transmitted to the external network communication server, the railway private network generates a short message containing a reload instruction, a key, and a data check code. This information is sent to all locomotives that need to update data through a secure channel (such as an encrypted communication protocol). The reload instruction instructs the locomotive to download and update data, while the key and data check code are used by the locomotive to decrypt and verify the data integrity after receiving the data file.

[0033] Step 4: Download and verify data files

[0034] After receiving the refitting instruction, the locomotive downloads the LKJ onboard basic data file from the external network communication server or other designated locomotives according to the information in the instruction. After the download is completed, the locomotive uses the received key and data verification code to decrypt and verify the downloaded data file to ensure the security, integrity and accuracy of the data. This step is one of the key links to ensure the success of data refitting.

[0035] Step 5: Data replacement

[0036] After completing the verification of the data files, the locomotive began to replace and update the LKJ2000 on-board basic data.

[0037] The present invention performs only one MTUP channel penetration operation on the LKJ vehicle-mounted basic data file to be replaced. In this process, the data file is safely and efficiently transmitted from the railway intranet to the external network environment and stored in the designated locomotive or external network communication server. This strategy avoids the burden of frequently penetrating the MTUP channel in the traditional method, and significantly improves the efficiency and stability of data transmission.

Claims

1. A method for distributed storage of LKJ on-board basic data to improve the speed of refitting, comprising a train operation monitoring and recording system, and also comprising an on-board wireless refitting system, wherein the on-board wireless refitting system is communicatively connected with the train operation monitoring and recording system, and is communicatively connected with a ground system under the control of the train operation monitoring and recording system, wherein the ground system comprises an external network server, a railway mobile data transmission unified platform, and an internal network server, wherein the external network server is communicatively connected with the on-board wireless refitting system through a public wireless communication network; It is characterized in that It also includes a data storage unit located at the external network server or the vehicle-mounted device, the data storage unit is used to store the vehicle-mounted data file to be replaced, and the vehicle-mounted data file to be replaced is encrypted and transmitted to the data storage unit by the railway mobile data transmission unified platform before wireless replacement; The ground system generates a reloading instruction set and an information set for decrypting the vehicle-mounted data file according to conditions; When wireless refitting is performed, after receiving the refitting instruction, the locomotive downloads the onboard basic data file from the external network communication server or other designated locomotives according to the information in the instruction; The locomotive decrypts and verifies the downloaded data file using the received decryption information.

2. According to claim 1, a method for improving the speed of changing equipment by distributing and storing LKJ vehicle-mounted basic data is characterized in that: The vehicle-mounted data file to be replaced is encrypted and decrypted using a pair of keys using the Rivest-Shamir-Adleman asymmetric encryption technology; the vehicle-mounted data file to be replaced is encrypted using a public key, and the private key is the information set used for decryption.

3. According to claim 1, a method for improving the speed of changing equipment by distributing and storing LKJ vehicle-mounted basic data is characterized in that: Data decryption also includes data integrity verification.

4. According to claim 3, a method for improving the speed of reloading by distributing the LKJ vehicle-borne basic data storage is characterized in that: When verifying data integrity, digital signatures and timestamps can be used as means of data integrity verification.

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