High-capacity wireless dump system based on private network 5G communication and control method

Abstract

The invention discloses a large-capacity wireless dump system based on private network 5G communication and a control method, and the system comprises a vehicle-mounted subsystem which comprises a vehicle-mounted dump host and vehicle-mounted antennas, and the vehicle-mounted dump host is connected with the two vehicle-mounted antennas through two Ethernet interfaces; the ground subsystem comprises a ground dump server, an optical fiber communication switch and two ground base stations; two Ethernet interfaces of the vehicle-mounted dump host are connected with the ground base station through the vehicle-mounted antenna and then form a local area network with the ground dump server; the ground dump server is used as a DHCP server, and two network cards of the vehicle-mounted dump host are used as DHCP clients to dynamically acquire an ip address from the ground dump server so as to realize data transmission. The control method is implemented based on the system. The method has the advantages that the structure is simple and compact, the implementation is easy, the wireless network communication signal quality can be improved, the effective data transmission time is prolonged, and the success rate and integrity of data downloading are improved.

Description

Technical Field

[0001] The present invention mainly relates to the field of rail transit communication technology, and in particular to a large-capacity wireless dump system and control method based on private network 5G communication. Background Art

[0002] With the rapid development of rail transit information technology, the intelligence level of on-board equipment has been continuously improved, generating a large amount of operating status data of various on-board equipment, especially large-capacity high-definition camera video data. In order to ensure the safe operation of locomotives / vehicles, a large amount of on-board operating status data needs to be analyzed and mined during locomotive operation, inspection, and maintenance to achieve the status repair of locomotives / vehicles and fault warning of important components. This fault warning is very necessary. In particular, the accident analysis after an accident during the operation of a locomotive / vehicle requires a large amount of comprehensive data samples, and the download of large-capacity on-board equipment operating status data has become a major technical problem.

[0003] The traditional solution for onboard data download is to wait for the locomotive to return to the depot, and then have the staff get on the locomotive to dump the data into a portable storage medium (U disk, hard disk, laptop), which is slow and time-consuming. In recent years, with the promotion and application of the CMD system (Chinese locomotive remote Monitoring and Diagnosis system) in various railway bureaus, the WLAN wireless automatic download function it uses can solve some of the problems of manual downloading. However, since the 2.4GHz and 5.8GHz frequency bands used are widely used in the commercial general field, the interference caused by similar signals in the surrounding area is very large, resulting in slow download speeds (less than 1MB / s in actual applications), which is far from meeting the needs of big data analysis.

[0004] In response to the problem of large-capacity data download on vehicles, some practitioners have proposed a locomotive large-capacity wireless dump system based on 5G technology. It uses 5G high-frequency wireless transmission technology to achieve a download speed of 1Gb / s, achieving the goal of high-speed, large-bandwidth data download. However, in its system solution, a directional on-board antenna needs to be installed on the locomotive, and the locomotive / vehicle can only dump data in a certain area of ​​the unilateral depot line (see Figure 1 ), that is, when the locomotive / vehicle enters from exit 1, the local area network between the vehicle and the ground server can only be established within area A, and the effective time for data dump is limited. Sometimes it is even difficult to successfully download the data required for this trip. Incomplete data download will lead to data unavailability. In addition, due to the directional characteristics of the vehicle antenna, when the locomotive is returned to the main factory for maintenance and the front and rear of the locomotive are reversed (see Figure 2), no matter where the locomotive / vehicle is, the onboard antenna and the ground base station cannot establish a connection, resulting in the inability to download data. In addition, when both sides (entrance 1 and exit 2) can enter the warehouse, if the locomotive / vehicle enters from entrance 2, it needs to wait until it runs into area A to establish a connection between the vehicle and the ground. In this case, the locomotive / vehicle normally stays in area C for a long time and in area A for a short time, which will result in a shorter data transmission time and the integrity of data transmission cannot be guaranteed.

[0005] In summary, the technical solutions of the prior art have the following deficiencies:

[0006] 1. The existing technical solutions have a small signal coverage range and a short effective data transmission time.

[0007] 2. When two or more transmission channels are connected to the vehicle host at the same time, due to the change of the effective transmission channel, the data transmission channel cannot be automatically switched in a short time, causing data transmission delay or failure.

[0008] 3. In the existing technical solution, when the head and tail directions of the locomotive / vehicle are reversed, the vehicle-ground connection cannot be established.

[0009] 4. The existing technical solutions are not suitable for line environments where both sides can enter and exit the warehouse.

[0010] 5. The network structure of the existing technical solution has changed, and the business application software needs to be adjusted accordingly. Summary of the invention

[0011] The technical problem to be solved by the present invention is: In view of the technical problems existing in the prior art, the present invention provides a large-capacity wireless dump system and control method based on private network 5G communication, which has a simple and compact structure, is easy to implement, can improve the quality of wireless network communication signals, extend the effective data transmission time, and improve the success rate and integrity of data downloading.

[0012] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0013] A large-capacity wireless dump system based on private network 5G communication, comprising:

[0014] The vehicle-mounted subsystem includes a vehicle-mounted dump host and a vehicle-mounted antenna. The vehicle-mounted dump host collects data of various vehicle-mounted subsystem devices through a communication interface and is connected to two vehicle-mounted antennas through two Ethernet interfaces to complete power supply and data transmission of the vehicle-mounted antennas.

[0015] A ground subsystem, comprising a ground dump server, an optical fiber communication switch and two ground base stations, wherein the two ground base stations are connected to the optical fiber communication switch via an optical fiber interface, and the ground dump server is connected to the optical fiber communication switch via a network interface;

[0016] After the two Ethernet interfaces of the vehicle-mounted dump host are connected to the ground base station through the vehicle-mounted antenna, a local area network is formed with the ground dump server; the ground dump server acts as a DHCP server, and the two network cards of the vehicle-mounted dump host act as DHCP clients to dynamically obtain IP addresses from the ground dump server, and data transmission is realized after the network connection is established.

[0017] As a further improvement of the system of the present invention: the on-board subsystems include one or more of the locomotive network control system TCMS, the locomotive on-board safety protection system 6A, the China Locomotive Remote Monitoring and Diagnosis System CMD and other subsystems.

[0018] As a further improvement of the system of the present invention: the two vehicle-mounted antennas are symmetrically installed on the top of the locomotive / vehicle, and the two ground base stations are symmetrically installed on both sides of the track.

[0019] As a further improvement of the system of the present invention: the vehicle-mounted antenna and the ground base station both use a dedicated 5G high-frequency unlicensed frequency band, the signal transmission adopts a horizontal directional method, and the scanning range is between vertical ±15° and horizontal ±45°.

[0020] As a further improvement of the system of the present invention: the ground base station and the vehicle-mounted antenna are both powered by POE.

[0021] As a further improvement of the system of the present invention: the vehicle-mounted antenna adopts an M12 interface to be connected to the 2.5G network interface of the vehicle-mounted dump host to achieve power supply and data transmission.

[0022] As a further improvement of the system of the present invention: the ground base station is deployed in front of the locomotive / vehicle storage and maintenance shed, and there is no obstruction in the upper space.

[0023] As a further improvement of the system of the present invention: the vehicle-mounted antennas are respectively installed on the roof of the locomotive / vehicle, and the two vehicle-mounted antennas are installed back to back, and the back-to-back installation method has opposite signal transmission directions and no intersection; the back-to-back distance between the vehicle-mounted antennas is L.

[0024] As a further improvement of the system of the present invention: the vehicle-mounted antenna is a directional antenna, or an omnidirectional antenna, or a vehicle-mounted antenna with a steering and following function.

[0025] The present invention further provides a control method based on any one of the above systems, comprising:

[0026] When the locomotive / vehicle enters from the first entrance and exit and enters the first area, a connection is established between the vehicle-mounted antenna A and the first ground base station, and the first network card of the vehicle-mounted dump host connected to the vehicle-mounted antenna A obtains the IP address assigned by the ground dump server, completes the vehicle-ground communication, and performs large-capacity data dump;

[0027] When a locomotive / vehicle enters the second area from the first area, since this area is a signal blind area, any vehicle-mounted antenna cannot establish a connection with any ground base station;

[0028] When the locomotive / vehicle enters the third area from the second area, a connection is established between the vehicle-mounted antenna B and the second ground base station, and the second network card of the vehicle-mounted dump host connected to the vehicle-mounted antenna B obtains the IP address assigned by the ground dump server; by executing the fast switching control strategy of the transmission channel, the channel between the second network card and the vehicle-mounted antenna B is quickly switched to ensure the smoothness of the network;

[0029] When the locomotive / vehicle leaves the third area, the connection between the vehicle-mounted antenna B and the second ground base station is disconnected, and the vehicle-mounted dump host is disconnected from the ground dump server local area network;

[0030] If the locomotive / vehicle enters from the second entrance and exit, according to the symmetrical design principle, the entire signal change and connection state change process is similar to the above;

[0031] If the locomotive / vehicle switches directions, according to the symmetrical design principle, the entire signal change and connection status change process is similar to the above.

[0032] As a further improvement of the method of the present invention: the fast switching control strategy of the transmission channel includes:

[0033] Step S10: After the vehicle-mounted dump host is powered on, it independently runs the control logic program for the rapid switching of the transmission channel and performs initialization;

[0034] Step S20: Delay t1 seconds to determine whether the first network card or the second network card has obtained the IP address. If not, there is no need to switch the transmission channel, and the current logic control ends, and the system immediately returns to wait for the next logic processing.

[0035] Step S30: If the first network card or the second network card obtains the IP address, the network connectivity with the ground dump server is determined by pinging the IP address of the ground dump server. If the ping is successful, it indicates that the 5G network wireless transmission channel is normal and there is no need to switch the transmission channel. This logic control ends and the system immediately returns to wait for the next logic processing.

[0036] Step S40: If the ping command fails when pinging the IP address of the ground dump server, the first network card is disabled, and then enabled again, and the ping command is executed again after a delay of t2 seconds. If the ping command returns successfully, it means that the network switching is successful, and the current logic control ends, and the command returns immediately to wait for the next logic processing to be executed.

[0037] Step S50: If pinging the IP address of the ground dump server still returns a failure, disable the second network card, then enable the second network card, and execute the ping command again after a delay of t2 seconds. If ping returns a successful result, it means that the network switch is successful, the current logic control ends, and immediately returns to wait for the next logic processing to be executed;

[0038] Step S60: If ping still returns failure, and if the network downtime does not exceed t3 seconds, the current logic control ends and returns immediately to wait for the next logic processing to be executed; if the network downtime has exceeded t3 seconds, the IP addresses of the first network card and the second network card are released, the current logic control ends, and returns immediately to wait for the next logic processing to be executed.

[0039] Compared with the prior art, the advantages of the present invention are:

[0040] 1. The large-capacity wireless dump system and control method based on private network 5G communication of the present invention have a simple and compact structure and are easy to implement. They can improve the quality of wireless network communication signals, extend the effective data transmission time, and improve the success rate and integrity of data downloading.

[0041] 2. The large-capacity wireless dump system and control method based on private network 5G communication of the present invention symmetrically installs two vehicle-mounted antennas on the top of the locomotive / vehicle, and symmetrically installs two ground base stations on both sides of the track. The relevant parameters (H, α, β, LH, LV, L) can be further adjusted according to the on-site conditions. This not only expands the coverage range of the ground base station signal, but also improves the quality of the wireless network communication signal.

[0042] 3. The large-capacity wireless dump system and control method based on private network 5G communication of the present invention has a fast switching control strategy for effective transmission channels. The fast switching control strategy effectively ensures the fast switching of effective transmission channels and runs independently. It does not affect the logical processing of the original business application software, while ensuring the timeliness of data downloading, improving the success rate of data downloading, and improving data integrity.

[0043] 4. In the large-capacity wireless dump system and control method based on private network 5G communication of the present invention, both the ground base station and the vehicle-mounted antenna are installed symmetrically, which solves the problem that the vehicle cannot establish a vehicle-ground connection after the locomotive / vehicle is reversed due to returning to the main engine factory for maintenance, etc., and can also be adapted to the environment of bilateral access lines.

[0044] 5. In the large-capacity wireless dump system and control method based on private network 5G communication of the present invention, two ground base stations and two vehicle-mounted antennas are installed back to back, which effectively avoids cross-interference of similar high-frequency signals and improves the bandwidth and efficiency of vehicle-to-ground data transmission.

[0045] 6. The large-capacity wireless dump system and control method based on private network 5G communication of the present invention has two ground base stations and vehicle-mounted antennas that are exactly the same and do not need to be redesigned, which reduces product development and maintenance costs and accelerates the application and promotion of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 The present invention is a schematic diagram of the working principle of a large-capacity wireless dump system for locomotives in the prior art.

[0047] Figure 2 The present invention is a schematic diagram of the working principle of a large-capacity wireless dump system for a locomotive after reversing in the prior art.

[0048] Figure 3 It is a schematic diagram of the topological structure principle of the wireless dump system of the present invention.

[0049] Figure 4 It is a schematic diagram of the working principle of the wireless dump system of the present invention in a specific application example.

[0050] Figure 5 It is a schematic diagram of the layout of the horizontal direction and the track direction of the ground base station signal transmission surface in a specific application example of the present invention.

[0051] Figure 6 It is a schematic diagram of the layout of the vertical direction and the track direction of the ground base station signal transmission surface in a specific application example of the present invention.

[0052] Figure 7 It is a schematic diagram of the layout between the installation level and the vehicle-mounted antenna on the top of a locomotive / vehicle in a specific application example of the present invention.

[0053] Figure 8 It is a layout schematic diagram of the horizontal distance and the vertical distance between ground base stations in a specific application example of the present invention.

[0054] Fig. 9 It is a schematic layout diagram of two vehicle-mounted antennas in a back-to-back installation manner in a specific application example of the present invention.

[0055] Fig.10 It is a flow chart of a fast switching control strategy of a transmission channel in a specific application example of the present invention. DETAILED DESCRIPTION

[0056] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0057] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0058] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0059] In this application, unless otherwise clearly specified and limited, the terms "assemble", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0060] like Figure 3 As shown, a large-capacity wireless dump system based on private network 5G communication of the present invention includes a vehicle-mounted subsystem and a ground subsystem, wherein:

[0061] The on-board subsystem includes an on-board dump host and an on-board antenna. The on-board dump host collects data from various on-board subsystem devices through communication interfaces such as Ethernet, RS485, and MVB, and connects two on-board antennas (A and B) respectively through two independent 2.5G Ethernet interfaces with POE power supply through two physical links to realize power supply and data transmission of the on-board antennas. The subsystem equipment includes but is not limited to: TCMS (Train Control and Management System), 6A (Locomotive On-board Safety Protection System), CMD (China Locomotive Remote Monitoring and Diagnostic System), etc.

[0062] The ground subsystem includes a ground dump server, a fiber optic communication switch and two ground base stations (A and B). The two ground base stations are connected to the fiber optic communication switch via a fiber optic interface, and the ground dump server is connected to the fiber optic communication switch via a 10 Gigabit network port.

[0063] After the two 2.5G Ethernet interfaces of the vehicle-mounted dump host in the present invention are connected to the ground base station through the vehicle-mounted antenna, a local area network is formed with the ground dump server. The ground dump server acts as a DHCP server, and the two 2.5G network cards of the vehicle-mounted dump host act as DHCP clients to dynamically obtain IP addresses from the ground dump server, and data transmission is realized after the network connection is established.

[0064] By adopting the above technical solution of the present invention, two vehicle-mounted antennas are symmetrically installed on the top of the locomotive / vehicle, and two ground base stations are symmetrically installed on both sides of the track. According to the on-site conditions, the relevant parameters are adjusted to adjust the download speed and download time to the optimal state. In this way, the signal coverage and signal quality of the ground base station can be expanded, the effective data transmission time can be extended, and the success rate and integrity of data download can be improved. Due to the symmetrical design principle, the connection between the vehicle and the ground and the data download are not affected after the locomotive / vehicle changes direction from head to tail; it can also solve the data download problem in the environment of bilateral access lines.

[0065] By adopting the above-mentioned technical solution of the present invention, it is possible to solve the problem that the large-capacity data that needs to be downloaded has not been downloaded in a short time due to the movement of the locomotive / vehicle into the warehouse, the locomotive / vehicle is no longer within the coverage of the ground base station signal, or the locomotive / vehicle cannot enter the coverage of the ground base station signal because the head and tail are swapped.

[0066] In a specific application example, the vehicle-mounted antenna and the ground base station both use a dedicated 5G high-frequency unlicensed frequency band (60GHz), and the signal transmission adopts a horizontal directional method, with a scanning range between vertical ±15° and horizontal ±45°; the single-link air interface rate between the vehicle-mounted antenna and the ground base station can reach an average of 1.7Gbps.

[0067] In a specific application example, both the ground base station and the vehicle-mounted antenna are powered by POE.

[0068] In a specific application example, the vehicle-mounted antenna adopts an M12 interface to connect to the 2.5G network port of the vehicle-mounted dump host to achieve power supply and data transmission.

[0069] In a specific application example, the ground base station uses a fastened RJ45 interface to achieve POE power supply and network debugging, and the network data communication interface uses an optical fiber interface with a transmission rate of up to 10Gbps.

[0070] As a preferred embodiment, the ground base station is preferably deployed in front of the locomotive / vehicle storage preparation shed (because the locomotive / vehicle stays here for a long time when entering the warehouse, providing time guarantee for large-capacity data dump), requiring no obstruction in the upper space range, and a ground base station is symmetrically deployed on both sides of the track (see Figure 4 ).

[0071] Further, preferably, the horizontal direction of the signal transmission surface of each ground base station maintains an oblique angle α with the track direction (see Figure 5 ), maintain the β-viewing angle in the vertical direction (see Figure 6 ), the installation level is higher than the vehicle-mounted antenna on the top of the locomotive / vehicle (see Figure 7 ), the two ground base stations maintain a horizontal distance LH and a vertical distance LV (see Figure 8 ), thereby ensuring that the vehicle-mounted antenna of the locomotive / vehicle can establish a stable connection within 500 meters of the ground base station signal transmission direction.

[0072] Further, preferably, the vehicle-mounted antennas in the present invention are respectively installed on the roof of the locomotive / vehicle, and the two vehicle-mounted antennas are installed in a back-to-back manner (that is, the signal transmission directions are opposite and there is no intersection), and the back-to-back distance between the antennas is L (see Fig. 9 ). Through the back-to-back design, cross-interference of similar high-frequency signals can be avoided, and the bandwidth of vehicle-to-ground data transmission can be improved.

[0073] In other embodiments, the present invention may also adopt omnidirectional ground base stations and vehicle-mounted antennas instead of directional antennas according to actual needs, which can functionally achieve the purpose of the present invention and should also be within the scope of protection of the present invention.

[0074] In other embodiments, the present invention may also adopt a vehicle-mounted antenna with a steering following function instead of two directional antennas according to actual needs. The vehicle-mounted host can obtain the status of the locomotive / vehicle entering and exiting the warehouse through an external system, and only activate the steering following function when needed. This should also be within the protection scope of the present invention.

[0075] In other embodiments, the present invention can also adopt free optical communication equipment instead of private network 5G communication equipment according to actual needs, that is, both the ground base station and the vehicle-mounted antenna adopt free optical communication equipment, the network topology remains unchanged, and the control strategy remains unchanged, which should also be within the protection scope of the present invention.

[0076] The present invention further provides a control method based on the above system, see Fig.10 and Figure 4 , the process of the method of the present invention comprises:

[0077] When the locomotive / vehicle enters from the first entrance and exit (entrance and exit 1) and enters the first area (area A), a connection is established between the vehicle-mounted antenna A and the first ground base station (ground base station 1), and the first network card (eth1) of the vehicle-mounted dump host connected to the vehicle-mounted antenna A obtains the IP address assigned by the ground dump server, thereby realizing vehicle-ground communication and performing large-capacity data dump;

[0078] When the locomotive / vehicle enters the second area (area B) from the first area (area A), since this area is a signal blind area, any vehicle-mounted antenna cannot establish a connection with any ground base station.

[0079] When the locomotive / vehicle enters the third area (area C) from the second area (area B), a connection is established between the vehicle-mounted antenna B and the second ground base station (ground base station 2), and the second network card (eth2) of the vehicle-mounted dump host connected to the vehicle-mounted antenna B obtains the IP address assigned by the ground dump server; however, since the IP address dynamically obtained by the first network card (eth1) of the vehicle-mounted dump host through DHCP is still within the validity period of the lease within the first area (area A), the second network card (eth2) also dynamically obtains the IP address from the ground dump server, so that the first network card (eth1) and the second network card (eth2) both have IP addresses and are in the same network segment; due to the default network routing principle, the data transmitted to the ground dump server still defaults to the first network card (eth1) and the vehicle-mounted antenna A channel, but in fact, the connection between the vehicle-mounted antenna A and the ground base station has been disconnected at this time, which causes the data to be unable to be transmitted to the ground dump server. At this time, by executing the fast switching control strategy of the transmission channel in the present invention, the channel between the second network card (eth2) and the vehicle-mounted antenna B is quickly switched to ensure the smoothness of the network.

[0080] When the locomotive / vehicle leaves the third area (area C), the connection between the vehicle-mounted antenna B and the second ground base station (ground base station 2) is disconnected, and the vehicle-mounted dump host is disconnected from the ground dump server local area network.

[0081] If the locomotive / vehicle enters from the second entrance and exit (entrance and exit 2), according to the symmetrical design principle, the entire signal change and connection state change process is similar to the above, and will not be repeated here.

[0082] If the locomotive / vehicle switches directions head to tail, according to the symmetrical design principle, the entire signal change and connection status change process is similar to the above, and will not be repeated here.

[0083] In a specific application example, the horizontal height difference H between the ground base station and the vehicle-mounted antenna, the horizontal offset angle α and the overhead viewing angle β of the signal transmission surface of the ground base station, the lateral distance LH and the longitudinal distance LV between the two ground base stations, and the back distance L between the two vehicle-mounted antennas in the present invention comprehensively determine the size of the signal effective area (area A and area C) and the signal blind area (area B).

[0084] In a specific application example, the fast switching control strategy of the transmission channel (see Fig.10 ) may include the following processes:

[0085] Step S10: After the vehicle-mounted dump host is powered on, it independently runs the control logic program for the rapid switching of the transmission channel and performs initialization;

[0086] Step S20: Delay t1 seconds (the size of t1 is set according to the actual situation), determine whether the first network card (eth1) or the second network card (eth2) obtains the IP address, if not, it means that there is no connection between the two transmission channels at this time, and there is no need to switch the transmission channel. This logic control ends and immediately returns to wait for the next logic processing;

[0087] Step S30: If the first network card (eth1) or the second network card (eth2) obtains the IP address, the ground dump server IP address is pinged (when the vehicle-mounted dump host obtains the IP address from the ground dump server through DHCP, the ground dump server IP address can be recorded) to determine the network connectivity with the ground dump server. If it can be pinged, it means that the 5G network wireless transmission channel is normal and there is no need to switch the transmission channel. This logic control ends and returns immediately to wait for the next logic processing.

[0088] Step S40: If a failure is returned when pinging the IP address of the ground dump server, it means that the wireless transmission channel of the 5G network is abnormal. At this time, disable the first network card (eth1), then enable the first network card (eth1), and delay for t2 seconds (the size of t2 is set according to the actual situation), and then execute the ping command. If it returns successfully at this time, it means that the network switching is successful, the current logic control ends, and it returns immediately to wait for the next logic processing.

[0089] Step S50: If pinging the ground dump server IP address still returns failure, it means that the 5G network wireless transmission channel is still in an abnormal state. At this time, disable the second network card (eth2), then enable the second network card (eth2), and execute the ping command again after a delay of t2 seconds. If ping returns a successful result, it means that the network switch is successful, the current logic control ends, and it returns immediately to wait for the next logic processing to be executed.

[0090] Step S60: If ping still returns failure, it means that there is no effective connection to the 5G network. If the network is disconnected for less than t3 seconds (the size of t3 is set according to the actual situation), the current logic control ends and returns immediately to wait for the next logic processing. If the network is disconnected for more than t3 seconds, the IP addresses of the first network card (eth1) and the second network card (eth2) are released (to avoid occupying the resources of the dynamic IP address pool of the ground dump server), the current logic control ends, and returns immediately to wait for the next logic processing.

[0091] Furthermore, in a preferred embodiment, the fast switching control strategy of the present invention is a description of two network cards in the same network segment. For the case of n network cards in the same network segment, the processing logic is similar. The processing principle is to keep only one network card in the application state at a time (disabling the other n-1 network cards) until the network channel is switched successfully or all n network cards have been traversed.

[0092] By adopting the above control strategy, it is possible to switch to an effective transmission channel in time, ensure the timeliness of data download, improve the success rate of data download, and improve the integrity of data. By adopting the above control strategy, it runs independently of the business application software, ensuring the smoothness of the network, and the business application software remains consistent with the original technical solution; the original business application software does not need to be modified due to changes in the network structure, which improves the versatility of the business application software.

[0093] The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims

1. A large-capacity wireless dump system based on private network 5G communication, characterized in that: include: The vehicle-mounted subsystem includes a vehicle-mounted dump host and a vehicle-mounted antenna. The vehicle-mounted dump host collects data of various vehicle-mounted subsystem devices through a communication interface and is connected to two vehicle-mounted antennas through two Ethernet interfaces to complete power supply and data transmission of the vehicle-mounted antennas. A ground subsystem, comprising a ground dump server, an optical fiber communication switch and two ground base stations, wherein the two ground base stations are connected to the optical fiber communication switch via an optical fiber interface, and the ground dump server is connected to the optical fiber communication switch via a network interface; After the two Ethernet interfaces of the vehicle-mounted dump host are connected to the ground base station through the vehicle-mounted antenna, a local area network is formed with the ground dump server; the ground dump server acts as a DHCP server, and the two network cards of the vehicle-mounted dump host act as DHCP clients to dynamically obtain IP addresses from the ground dump server, and data transmission is realized after the network connection is established.

2. According to claim 1, the large-capacity wireless dump system based on private network 5G communication is characterized in that: The on-board subsystems include one or more of the locomotive network control system TCMS, the locomotive on-board safety protection system 6A, and the China Locomotive Remote Monitoring and Diagnosis System CMD.

3. According to claim 1, the large-capacity wireless dump system based on private network 5G communication is characterized in that: The two vehicle-mounted antennas are symmetrically installed on the top of the locomotive / vehicle, and the two ground base stations are symmetrically installed on both sides of the track.

4. According to claim 1, the large-capacity wireless dump system based on private network 5G communication is characterized in that: The vehicle-mounted antenna and the ground base station both use a dedicated 5G high-frequency unlicensed frequency band, and the signal transmission adopts a horizontal directional method. The scanning range is between vertical ±15° and horizontal ±45°.

5. According to claim 1, the large-capacity wireless dump system based on private network 5G communication is characterized in that: The ground base station and the vehicle-mounted antenna are both powered by POE.

6. The large-capacity wireless dump system based on private network 5G communication according to claim 1 is characterized in that: The vehicle-mounted antenna adopts an M12 interface to connect to the 2.5G network interface of the vehicle-mounted dump host to achieve power supply and data transmission.

7. The large-capacity wireless dump system based on private network 5G communication according to claim 1 is characterized in that: The ground base station is deployed in front of the locomotive / vehicle storage and maintenance shed, and there is no obstruction in the upper space.

8. The large-capacity wireless dump system based on private network 5G communication according to claim 1 is characterized in that: The vehicle-mounted antennas are respectively installed on the roof of the locomotive / vehicle, and the two vehicle-mounted antennas are installed in a back-to-back manner, in which the signal transmission directions are opposite and there is no intersection; the back-to-back distance between the vehicle-mounted antennas is L.

9. The large-capacity wireless dump system based on private network 5G communication according to claim 1 is characterized in that: The vehicle-mounted antenna is a directional antenna, an omnidirectional antenna, or a vehicle-mounted antenna with a steering and following function.

10. A control method based on the system according to any one of claims 1 to 9, characterized in that: include: When the locomotive / vehicle enters from the first entrance and exit and enters the first area, a connection is established between the vehicle-mounted antenna A and the first ground base station, and the first network card of the vehicle-mounted dump host connected to the vehicle-mounted antenna A obtains the IP address assigned by the ground dump server, completes the vehicle-ground communication, and performs large-capacity data dump; When a locomotive / vehicle enters the second area from the first area, since this area is a signal blind area, any vehicle-mounted antenna cannot establish a connection with any ground base station; When the locomotive / vehicle enters the third area from the second area, a connection is established between the vehicle-mounted antenna B and the second ground base station, and the second network card of the vehicle-mounted dump host connected to the vehicle-mounted antenna B obtains the IP address assigned by the ground dump server; by executing the fast switching control strategy of the transmission channel, the channel between the second network card and the vehicle-mounted antenna B is quickly switched to ensure the smoothness of the network; When the locomotive / vehicle drives out of the third area, the connection between the vehicle-mounted antenna B and the second ground base station is disconnected, and the vehicle-mounted dump host is disconnected from the ground dump server local area network; If the locomotive / vehicle enters from the second entrance and exit, according to the symmetrical design principle, the entire signal change and connection state change process is similar to the above; If the locomotive / vehicle switches directions, according to the symmetrical design principle, the entire signal change and connection status change process is similar to the above.

11. The control method according to claim 10, characterized in that: The fast switching control strategy of the transmission channel includes: Step S10: After the vehicle-mounted dump host is powered on, it independently runs the control logic program for the rapid switching of the transmission channel and performs initialization; Step S20: Delay t1 seconds to determine whether the first network card or the second network card has obtained the IP address. If not, there is no need to switch the transmission channel, and the current logic control ends, and the system immediately returns to wait for the next logic processing. Step S30: If the first network card or the second network card obtains the IP address, the network connectivity with the ground dump server is determined by pinging the IP address of the ground dump server. If the ping is successful, it indicates that the 5G network wireless transmission channel is normal and there is no need to switch the transmission channel. This logic control ends and the system immediately returns to wait for the next logic processing. Step S40: If the ping command fails when pinging the IP address of the ground dump server, the first network card is disabled, and then enabled again, and the ping command is executed again after a delay of t2 seconds. If the ping command returns successfully, it means that the network switching is successful, and the current logic control ends, and the command returns immediately to wait for the next logic processing to be executed. Step S50: If pinging the IP address of the ground dump server still returns a failure, disable the second network card, then enable the second network card, and execute the ping command again after a delay of t2 seconds. If ping returns a successful result, it means that the network switch is successful, the current logic control ends, and immediately returns to wait for the next logic processing to be executed; Step S60: If ping still returns failure, and if the network downtime does not exceed t3 seconds, the current logic control ends and returns immediately to wait for the next logic processing to be executed; if the network downtime has exceeded t3 seconds, the IP addresses of the first network card and the second network card are released, the current logic control ends, and returns immediately to wait for the next logic processing to be executed.

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