A train-ground wireless transmission method for rail transit

Abstract

The present application relates to the field of rail transit data transmission technology, and discloses a train-ground wireless transmission method for rail transit; the train-ground wireless transmission method for rail transit comprises the following steps: S1: transmission architecture construction; S2: security architecture construction; S3: data segment transmission; S4: cloud edge collaborative storage, the terminal, RAN, bearing and core network in the transmission network, that is, the 5G network, are segmented and encrypted, so that different encryption modes can be set according to data transmission requirements, the safety of data transmission can be ensured while the data transmission rate is ensured, a more targeted data protection mechanism is obtained, the data processing amount of the total control end can be reduced, the data receiving and processing efficiency of the total control end can be improved, the instantaneity of total control command is ensured, the storage integrity of data is ensured, and data mining and fusion can be conveniently carried out subsequently.

Description

Technical Field

[0001] The present invention belongs to the technical field of rail transit data transmission, and in particular relates to a vehicle-to-ground wireless transmission method for rail transit. Background Art

[0002] Rail transit is a vehicle transportation system that uses track structures for load-bearing and guidance. Urban rail transit is the backbone of urban public transportation. It offers energy-saving, land-saving, high-capacity, all-weather, pollution-free, and safe transportation. It is a green and environmentally friendly transportation system particularly suitable for large and medium-sized cities.

[0003] Rail transit needs to obtain its transmission data when it is being controlled. Existing data is generally encrypted by encrypting the entire transmission network during transmission to ensure data security. This method requires processing the encrypted data of the entire network, and the data processing volume is large. During data transmission, different encryption methods are required for different ports, and the current overall encryption cannot perform targeted encryption according to needs; therefore, in view of the current situation, it needs to be improved. Summary of the Invention

[0004] In view of the above situation, in order to overcome the defects of the existing technology, the present invention provides a vehicle-to-ground wireless transmission method for rail transit, which effectively solves the problem that rail transit needs to obtain rail transit transmission data when it is controlled. The existing data is generally encrypted by the entire transmission network during transmission to ensure data security. This method needs to process the encrypted data of the entire network, and the data processing volume is large. During data transmission, different encryption methods are required for different ports, and the current overall encryption cannot perform targeted encryption according to needs.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a vehicle-to-ground wireless transmission method for rail transit, comprising the following steps:

[0006] S1: Transmission architecture construction: Node servers are established on the track at a specified distance of 300-500m, and an identification code is set for each node server. The identification code corresponds to the node server in a one-to-one relationship. After the node server is built, a node server base station and a switch are established at each rail transit stop. The node server, node server base station, and switch are all connected to the 5G base station.

[0007] S2: Security architecture construction: When constructing a security architecture, it is divided into two aspects: one is equipment security, and the other is data transmission security. When constructing an architecture for equipment security, equipment status monitoring devices are installed at node servers, node server base stations, and switches. The equipment status monitoring devices transmit the monitoring data of the corresponding node servers, node server base stations, and switches to the master control end in a transmission cycle of 1-2 minutes. When constructing an architecture for data transmission security, the 5G network used in the overall data transmission is divided into terminals, RAN, bearer, and core network, and these four segments are encrypted in sections.

[0008] S3: Segmented Data Transmission: Based on steps S1 and S2 above, when the rail transit reaches the nearest node server, the data transmission device on the rail transit itself sends a signal, which is received by the nearest node server and transmitted through the encrypted terminal, RAN, bearer, and core network to the nearest rail transit stop node server base station and switch. The data is then segmented and analyzed by the nearest rail transit stop node server base station and switch, and then transmitted to the master control end for overall analysis.

[0009] S4: Cloud-edge collaborative storage: Based on step S3, after the data is transmitted to the master control end for overall analysis, it is immediately stored in the master control end, and the stored data is transmitted to the cloud connected to the master control end in a cycle of 5-7 days. After the transmission, the data that has been transmitted in the master control end is deleted.

[0010] Preferably, in step S1, the node server is equipped with a positioning unit and a speed measuring unit, the positioning unit is specifically a centimeter-level real-time positioning technology based on NovAtel real-time RTK technology and NovAtel post-differential technology, and the speed measuring unit is specifically a GIS-based ranging microwave radar.

[0011] Preferably, in step S1, the process of identifying the identification code of the node server is: first receiving the identification code, then analyzing the characteristics of the domain name type of the identification code and obtaining the word segmentation characteristics; finally completing the identification based on whether the word segmentation characteristics correspond.

[0012] Preferably, in step S2, the specific carriers of the equipment status monitoring equipment are a monitoring camera unit and a data monitoring unit, and the monitoring camera unit is specifically one or a combination of an infrared camera, a motion camera or an AI intelligent sensing camera; the data monitoring unit is specifically a temperature sensor, a humidity sensor, a signal sensor, a current sensor, a voltage sensor and a resistance sensor.

[0013] Preferably, in step S2, physical security and logical security methods are specifically used for segmented encryption of terminals, RAN, bearers and core networks, and CA authentication is used between the 5G network and node servers, node server base stations and switches, and virtual or physical firewalls are deployed, and access policies are set.

[0014] Preferably, in step S3, the specific steps for the nearest rail transit stop node server base station and switch to perform segmented analysis on the data are: ①: preprocessing the data; ②: calculating the security threshold of the preprocessed data; ③: transmitting the results of the security threshold calculation and the preprocessed data.

[0015] Preferably, the preprocessing steps include: removing unique attributes, missing value processing, outlier processing, feature encoding, data standardization and feature selection.

[0016] Preferably, in step S4, the cloud is specifically one or a combination of private cloud, self-built server, China Mobile Cloud, China Unicom Cloud, China Telecom Cloud, IBM Cloud or Google Cloud.

[0017] Compared with the existing technology, the present invention has the following advantages: 1. The transmission network, i.e., the terminal, RAN, bearer, and core network in the 5G network, performs segmented encryption to set different encryption methods according to data transmission requirements. While ensuring the data transmission rate, it can also ensure the security of data transmission, thus obtaining a more targeted data protection mechanism;

[0018] 2. The data is processed by the pause node server base station and the switch before being transmitted to the master control end, thereby reducing the data processing volume of the master control end, improving the data receiving and processing efficiency of the master control end, and ensuring the immediacy of the master control command;

[0019] 3. Collaborative data storage between the cloud and the master control terminal can ensure the integrity of data storage and facilitate subsequent data mining and fusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0021] In the attached figure:

[0022] Figure 1 This is a flow chart of a vehicle-to-ground wireless transmission method for rail transit according to the present invention. DETAILED DESCRIPTION

[0023] The technical solutions 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, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] like Figure 1 As shown, the present invention provides a technical solution: a vehicle-to-ground wireless transmission method for rail transit, comprising the following steps:

[0025] S1: Transmission architecture construction: Node servers are established on the track at a specified distance of 300-500m, and an identification code is set for each node server. The identification code corresponds to the node server in a one-to-one relationship. After the node server is built, a node server base station and a switch are established at each rail transit stop. The node server, node server base station, and switch are all connected to the 5G base station.

[0026] S2: Security architecture construction: When constructing a security architecture, it is divided into two aspects: one is equipment security, and the other is data transmission security. When constructing an architecture for equipment security, equipment status monitoring devices are installed at node servers, node server base stations, and switches. The equipment status monitoring devices transmit the monitoring data of the corresponding node servers, node server base stations, and switches to the master control end in a transmission cycle of 1-2 minutes. When constructing an architecture for data transmission security, the 5G network used in the overall data transmission is divided into terminals, RAN, bearer, and core network, and these four segments are encrypted in sections.

[0027] S3: Segmented Data Transmission: Based on steps S1 and S2 above, when the rail transit reaches the nearest node server, the data transmission device on the rail transit itself sends a signal, which is received by the nearest node server and transmitted through the encrypted terminal, RAN, bearer, and core network to the nearest rail transit stop node server base station and switch. The data is then segmented and analyzed by the nearest rail transit stop node server base station and switch, and then transmitted to the master control end for overall analysis.

[0028] S4: Cloud-edge collaborative storage: Based on step S3, after the data is transmitted to the master control end for overall analysis, it is immediately stored in the master control end, and the stored data is transmitted to the cloud connected to the master control end in a cycle of 5-7 days. After the transmission, the data that has been transmitted in the master control end is deleted.

[0029] Among them, in step S1, the node server is equipped with a positioning unit and a speed measurement unit. The positioning unit is specifically a centimeter-level real-time positioning technology based on NovAtel real-time RTK technology and NovAtel post-differential technology, and the speed measurement unit is specifically a GIS-based ranging microwave radar; the identification code recognition process of the node server is: first, the identification code is received, and then the characteristics of the domain name type of the identification code are analyzed to obtain the word segmentation characteristics; finally, the recognition is completed according to whether the word segmentation characteristics correspond, and the driving speed and current position of the vehicle can be located and transmitted through the positioning unit and the speed measurement unit.

[0030] In step S2, the specific carriers of the equipment status monitoring equipment are monitoring camera units and data monitoring units. The monitoring camera unit is specifically an infrared camera, a motion camera or an AI smart sensing camera, or a combination of several of them; the data monitoring unit is specifically a temperature sensor, a humidity sensor, a signal sensor, a current sensor, a voltage sensor and a resistance sensor; the segmented encryption of the terminal, RAN, bearer and core network specifically adopts physical security methods and logical security methods, and the CA authentication method is adopted between the 5G network and the node server, the node server base station and the switch, and a virtual or physical firewall is deployed, and an access policy is set to segment the terminal, RAN, bearer and core network in the transmission network, i.e. the 5G network, so as to set different encryption methods according to the data transmission requirements. While ensuring the data transmission rate, the security of the data transmission can be guaranteed, and a more targeted data protection mechanism can be obtained.

[0031] In step S3, the specific steps for the nearest rail transit pause station node server base station and switch to perform segmented analysis on the data are: ①: preprocessing the data; ②: calculating the security threshold of the preprocessed data; ③: transmitting the results of the security threshold calculation and the preprocessed data; the preprocessing steps include: removing unique attributes, missing value processing, outlier processing, feature encoding, data standardization and feature selection. The data is processed by the pause station node server base station and the switch and then transmitted to the master control end, thereby reducing the data processing volume of the master control end, improving the data receiving and processing efficiency of the master control end, and ensuring the immediacy of the master control command.

[0032] In step S4, the cloud is specifically a private cloud, a self-built server, a mobile cloud, a Unicom cloud, a Telecom cloud, an IBM cloud or a Google cloud, or a combination of these. By coordinating data storage between the cloud and the master control terminal, the integrity of the data storage can be ensured, facilitating subsequent data mining and fusion.

[0033] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0034] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A vehicle-to-ground wireless transmission method for rail transit, characterized by: The following steps are involved: S1: Transmission architecture construction: Node servers are established on the track at a specified distance of 300-500m, and an identification code is set for each node server. The identification code corresponds to the node server in a one-to-one relationship. After the node server is built, a node server base station and a switch are established at each rail transit stop. The node server, node server base station, and switch are all connected to the 5G base station. S2: Security architecture construction: When constructing a security architecture, it is divided into two aspects: one is equipment security, and the other is data transmission security. When constructing an architecture for equipment security, equipment status monitoring devices are installed at node servers, node server base stations, and switches. The equipment status monitoring devices transmit the monitoring data of the corresponding node servers, node server base stations, and switches to the master control end in a transmission cycle of 1-2 minutes. When constructing an architecture for data transmission security, the 5G network used in the overall data transmission is divided into terminals, RAN, bearer, and core network, and these four segments are encrypted in sections. S3: Segmented Data Transmission: Based on steps S1 and S2 above, when the rail transit reaches the nearest node server, the data transmission device on the rail transit itself sends a signal, which is received by the nearest node server and transmitted through the encrypted terminal, RAN, bearer, and core network to the nearest rail transit stop node server base station and switch. The data is then segmented and analyzed by the nearest rail transit stop node server base station and switch, and then transmitted to the master control end for overall analysis. S4: Cloud-edge collaborative storage: Based on step S3, after the data is transmitted to the master control end for overall analysis, it is immediately stored in the master control end, and the stored data is transmitted to the cloud connected to the master control end in a cycle of 5-7 days. After the transmission, the data that has been transmitted in the master control end is deleted.

2. The vehicle-to-ground wireless transmission method for rail transit according to claim 1, characterized in that: In step S1, the node server is equipped with a positioning unit and a speed measuring unit. The positioning unit is specifically a centimeter-level real-time positioning technology based on NovAtel real-time RTK technology and NovAtel post-differential technology, and the speed measuring unit is specifically a GIS-based ranging microwave radar.

3. The vehicle-to-ground wireless transmission method for rail transit according to claim 2, characterized in that: In step S1, the process of identifying the identification code of the node server is as follows: first, the identification code is received; second, the characteristics of the domain name type of the identification code are analyzed to obtain the word segmentation characteristics; and finally, the identification is completed based on whether the word segmentation characteristics correspond.

4. The vehicle-to-ground wireless transmission method for rail transit according to claim 1, characterized in that: In step S2, the specific carriers of the equipment status monitoring equipment are a monitoring camera unit and a data monitoring unit. The monitoring camera unit is specifically an infrared camera, a motion camera or an AI intelligent sensing camera or a combination of several of them; the data monitoring unit is specifically a temperature sensor, a humidity sensor, a signal sensor, a current sensor, a voltage sensor and a resistance sensor.

5. The vehicle-to-ground wireless transmission method for rail transit according to claim 4, characterized in that: In step S2, physical security and logical security methods are specifically used for segmented encryption of terminals, RAN, bearers, and core networks, and CA authentication is used between the 5G network and node servers, node server base stations, and switches. Virtual or physical firewalls are deployed, and access policies are set.

6. The vehicle-to-ground wireless transmission method for rail transit according to claim 1, characterized in that: In step S3, the specific steps of segmenting and analyzing the data by the nearest rail transit stop node server base station and switch are as follows: ① pre-processing the data; ②: Calculate the security threshold of the pre-processed data; ③: Transmit the results of security threshold calculation and preprocessed data.

7. The vehicle-to-ground wireless transmission method for rail transit according to claim 6, characterized in that: The preprocessing steps include: removing unique attributes, missing value processing, outlier processing, feature encoding, data standardization and feature selection.

8. The vehicle-to-ground wireless transmission method for rail transit according to claim 1, characterized in that: In step S4, the cloud is specifically one or a combination of private cloud, self-built server, China Mobile Cloud, China Unicom Cloud, China Telecom Cloud, IBM Cloud or Google Cloud.

Images