A wireless communication method and system for remote control of vehicles in a yard operation area

Abstract

The application discloses a wireless communication method and system for remote control of vehicles in a yard operation area, and relates to the technical field of multi-mode fusion wireless communication. The main technical scheme of the application is as follows: according to the center side connection structure, the base station side connection structure and the mobile vehicle side connection structure included in the system, for a target vehicle in the yard operation area, at least two millimeter wave frequency band transmission links corresponding to the target vehicle are used to respectively and synchronously transmit collected data information related to a business to a center redundant switch, and the center redundant switch decides to transmit the data information on which link to a target control platform; a wideband wireless frequency band is used as a redundant standby working frequency band of the millimeter wave frequency band, so that when the target vehicle is about to enter another operation area or is about to enter a millimeter wave frequency band coverage blind area, the wideband wireless frequency band can be started in time to ensure that the data information related to the business is transmitted to the target control platform.

Description

Technical Field

[0001] This application relates to the field of multi-mode fusion wireless communication technology, and in particular to a wireless communication method and system for remote control of vehicles in yard operation areas. Background Technology

[0002] With the continuous improvement of port automation and intelligence, the amount of business data carried by port remote control (RC) systems has increased dramatically. Early remote control systems only needed to transmit low-bandwidth control commands and status information, with bandwidth requirements typically in the tens of megabits per second (Mbps). However, current and future remote control services typically include multiple high-definition or even ultra-high-definition video streams (primarily used for remote operator views, cabin monitoring, container number identification, etc.), a large amount of sensor data, and control commands, resulting in total bandwidth requirements now consistently exceeding 300 Mbps and growing towards gigabit levels.

[0003] Currently, traditional Sub6 GHz wireless systems (especially the commonly used 5.8 GHz band) face bottlenecks in terms of spectrum resources, anti-interference capabilities, and single-site capacity, making it difficult to independently meet the requirements of such high bandwidth and extremely low latency. Therefore, an innovative wireless communication solution is urgently needed. Summary of the Invention

[0004] This application provides a wireless communication method and system for remote control of vehicles in yard operation areas. The main purpose is to use multi-band intelligent switching and cooperation. Since the multi-band used is a fusion of "millimeter wave band" and "broadband wireless band", the wireless communication solution provided by this application can not only make full use of the large bandwidth and low latency characteristics of millimeter wave as the backbone of data transmission, but also integrate the advantages of wide coverage and good mobility of wireless communication as a guarantee for seamless switching, thereby building a highly reliable, high-capacity, and continuously covered mobile vehicle remote control communication network.

[0005] To achieve the above objectives, this application mainly provides the following technical solutions: The first aspect of this application provides a wireless communication method for remote control of vehicles in a yard operation area, the method comprising: For a target vehicle in the yard operation area, at least two first-band transmission links deployed for the target vehicle are used to synchronously transmit the collected business-related data information to the central redundancy switcher, so that the central redundancy switcher selects one of the at least two first-band transmission links to upload the data information on the target link to the target control platform. By utilizing the second frequency band transmission link deployed corresponding to the target vehicle, the collected status information of the second frequency band transmission link is transmitted to the central redundancy switch, enabling the central redundancy switch to monitor the operating status of the second frequency band transmission link in real time; wherein, the second frequency band serves as a redundant backup working frequency band for the first frequency band to ensure that business-related data information is transmitted to the target control platform; When it is predicted that the target vehicle is about to move to another work area based on the target vehicle's driving trajectory, or when it is predicted that the target vehicle is about to enter the coverage blind spot of the first frequency band, a channel switching instruction is issued to the central redundant switcher. The cross-frequency band switching instruction includes cross-frequency band switching strategies corresponding to different predictions of the target vehicle. According to the cross-band switching strategy, the central redundant switcher generates a link switching command and issues it to the target vehicle, so that the target vehicle switches to use the second frequency band transmission link to transmit the collected service-related data information to the central redundant switcher, so that the central redundant switcher uploads the data information to the target control platform.

[0006] A second aspect of this application provides a wireless communication system for remote vehicle control in a yard operation area, the system comprising: The system includes: a central side connection structure, a base station side connection structure, and a mobile vehicle side connection structure; The central-side connection structure includes: a port machinery location positioning system functional unit, a host computer, and a central redundancy switch; the port machinery location positioning system functional unit transmits the collected port machinery location information to the host computer; the host computer formulates a channel switching strategy based on the location information, yard terrain, and base station layout, generates a channel switching command, and sends it to the central redundancy switch; the central redundancy switch, as the system decision center, receives the channel switching command and sends a link switching command to the base station-side connection structure and the mobile vehicle-side connection structure; The base station-side connection structure includes: a second frequency band base station, and a base station group consisting of at least two first frequency band base stations and an optoelectronic switch; the optoelectronic switch is used to aggregate the wireless data of each first frequency band base station; the second frequency band base station and the base station group transmit their respective wireless data to the central redundancy switcher, and simultaneously receive the link switching command from the central redundancy switcher and forward it to the mobile vehicle-side connection structure; The mobile vehicle-side connection structure includes: at least two first-band remote stations, a second-band remote station, a redundant switching terminal, and vehicle-mounted equipment; the redundant switching terminal establishes data communication with the first-band remote station, the second-band remote station, and the vehicle-mounted equipment respectively, so as to receive and summarize the service-related data information collected by the vehicle-mounted equipment, and distribute the data information to different frequency band remote stations according to the link switching instructions issued by the central redundant switcher.

[0007] A third aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the wireless communication method for remote vehicle control in a yard work area as described above.

[0008] A fourth aspect of this application provides an electronic device, the device including at least one processor, and at least one memory and bus connected to the processor; The processor and the memory communicate with each other via the bus. The processor is used to call program instructions in the memory to execute the wireless communication method for remote vehicle control in the yard operation area as described above.

[0009] By employing the above-described technical solution, the technical solution provided in this application has at least the following advantages: This application provides a wireless communication method and system for remote control of vehicles in a yard operation area. Based on the system's central-side connection structure, base station-side connection structure, and mobile vehicle-side connection structure, for a target vehicle in the yard operation area, this application utilizes at least two millimeter-wave frequency band transmission links deployed for the target vehicle to synchronously transmit the collected service-related data information to a central redundant switch. The central redundant switch then decides which link's data information to transmit to the target control platform. Thus, this application employs at least a "dual-active data" method to achieve data information transmission and selects high-quality data, thereby ensuring the data acquisition quality of the target control platform. Furthermore, a broadband wireless frequency band is used as a redundant backup working frequency band for the millimeter-wave frequency band. Therefore, when the target vehicle is about to move to another operation area or enter a millimeter-wave frequency band coverage blind spot, the broadband wireless frequency band can be activated in a timely manner to ensure the transmission of service-related data information to the target control platform.

[0010] Compared to existing technologies, wireless systems cannot independently meet the high bandwidth and extremely low latency requirements of remote control of mobile vehicles in ports. This application uses multi-band intelligent switching and collaboration. Furthermore, since the multi-band used is a fusion of "millimeter wave band" and "broadband wireless band", the wireless communication solution provided by this application can fully utilize the high bandwidth and low latency characteristics of millimeter waves as the backbone of data transmission, and also integrate the advantages of wide coverage and good mobility of wireless communication as a guarantee for seamless switching, thereby constructing a highly reliable, high-capacity, and continuously covered remote control communication network for mobile vehicles.

[0011] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0012] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A block diagram illustrating the composition of a wireless communication system for remote vehicle control in a yard operation area, provided in an embodiment of this application; Figure 2 For the purposes of this application's embodiments Figure 1 The example diagram provided for the system shown is illustrated below. Figure 3 This is a system network architecture diagram provided by this application for remote control of multiple vehicles in the yard operation area; Figure 4 A flowchart illustrating the composition of a wireless communication method for remote vehicle control in a yard operation area, provided in this application embodiment; Figure 5 This is a flowchart illustrating the process of generating channel switching instructions by the host computer, as provided in an embodiment of this application. Detailed Implementation

[0013] Exemplary embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of the present application to those skilled in the art.

[0014] With the continuous advancement of port automation and intelligence, the amount of business data carried by the port remote control (RC) system has increased dramatically, and the total bandwidth requirement has steadily exceeded 300Mbps and is climbing towards the gigabit level.

[0015] Currently, traditional Sub-6 GHz wireless systems (especially the widely used 5.8 GHz band) are gradually showing bottlenecks in terms of spectrum resources, anti-interference capabilities, and single-site capacity, making it difficult to independently meet the demands for such high bandwidth and low latency. Existing technical solutions mainly suffer from the following shortcomings: (1) Bandwidth bottleneck: The capacity of a single base station in a traditional 5.8GHz system is usually less than 800Mbps, which is difficult to adapt to the high bandwidth requirements of high-definition video backhaul and real-time control of multiple devices; (2) Insufficient switching performance: The switching time of the master-slave switching mechanism is relatively long (usually >100ms), which cannot guarantee the continuity of real-time control services; (3) Coverage and capacity contradiction: A single frequency band is difficult to simultaneously meet the dual requirements of coverage and data capacity; (4) Poor environmental adaptability: In the complex electromagnetic environment of ports, a single communication method is easily interfered with, and reliability is difficult to be effectively guaranteed.

[0016] Therefore, in order to provide an innovative wireless communication solution, the inventors discovered through research that every communication technology has its advantages and disadvantages. So, if multi-mode fusion is used instead of a single wireless communication technology, the advantages of different wireless communication technologies can be utilized to build a solution that meets the high bandwidth and low latency requirements of today's port mobile vehicle remote control systems.

[0017] For example, millimeter wave (such as 60GHz) communication technology, relying on its abundant spectrum resources, can provide access bandwidth of several gigabits per second (Gbps) and ultra-low latency of milliseconds (<2ms), which is highly compatible with the urgent needs of mobile vehicle remote control services for high bandwidth and high real-time performance. While taking into account the advantages of millimeter wave communication technology, we should also avoid its inherent limitations (such as relatively short transmission distance, weak diffraction ability, and susceptibility to blockage). For example, we can integrate the advantages of 5.8GHz wireless communication, such as wide coverage and good mobility, as a guarantee for seamless switching, thereby building a highly reliable, high-capacity, and continuously covered mobile vehicle remote control communication network.

[0018] Based on the above considerations, embodiments of this application provide a wireless communication system for remote vehicle control in yard operation areas, such as... Figure 1 As shown, the system includes: a central-side connection structure 1, a base station-side connection structure 2, and a mobile vehicle-side connection structure 3, and... Figure 1 The system shown provides an example illustration (such as...). Figure 2 ), combined Figure 1 and Figure 2 The specific explanation includes the following: The central-side connection structure 1 comprises a port machinery location positioning system functional unit 11, a host computer 12, and a central redundancy switch 13, connected in a hierarchical manner. The port machinery location positioning system functional unit 11 transmits the collected port machinery location information to the host computer 12; the host computer 12 formulates a channel switching strategy based on the location information, yard terrain, and base station layout, generates a channel switching command, and sends it to the central redundancy switch 13; the central redundancy switch 13, as the system decision-making center, receives the channel switching command and then sends control commands such as link switching to the base station-side connection structure 2 and the moving vehicle-side connection structure 3.

[0019] It should be noted that the main function of the host computer 12 is to interface with the port machinery positioning system functional unit 11 and obtain external requirements such as control commands and work plans based on external interfaces (such as mobile vehicle positioning systems and other systems). That is, it obtains multi-source data information from multiple sources and has a central data processing function to process this multi-source data information to generate "channel switching commands".

[0020] Furthermore, the central redundancy switcher 13 includes a quality assessment module and an intelligent routing module. The quality assessment module is used to assess the data transmission quality of at least two first-band transmission links to select the best data information transmitted on a target link and finally send it to the target control platform (or, the control core network). The intelligent routing module is used to generate a "link switching instruction" for switching different transmission links after receiving the "channel switching instruction" issued by the host computer 12.

[0021] The base station-side connection structure 2 includes: a second-band base station 21, and a base station group 22 consisting of at least two first-band base stations 221 and an optoelectronic switch 222; the optoelectronic switch 222 is used to aggregate the wireless data of each first-band base station 221; the second-band base station 21 and the base station group 22 transmit their respective wireless data to the central redundancy switch 13, and simultaneously receive link switching instructions from the central redundancy switch 13, forwarding them to the mobile vehicle-side connection structure 3. For example, the first band is a millimeter-wave band, such as a 60GHz millimeter-wave base station, and the second band is a broadband wireless band, such as a 5.8GHz broadband wireless base station 21.

[0022] Specifically, the first-band base stations are deployed on the high ground on both sides of the storage yard, using 60GHz millimeter-wave equipment with integrated 90° beamforming antennas to form the main coverage area; the second-band base stations are deployed in the center of the storage yard or at high points, using tri-polarized sector antennas to form a full-field coverage network.

[0023] The mobile vehicle-side connection structure 3 includes: at least two first-band remote stations 31, a second-band remote station 32, a redundancy switching terminal 33, and an on-board device 34. The redundancy switching terminal 33 establishes data communication with the first-band remote station 31, the second-band remote station 32, and the on-board device 34 respectively, to receive and summarize service-related data information collected by the on-board device 34, and to distribute data information to different frequency band remote stations according to the link switching instructions issued by the central redundancy switcher 13. For example, the first-band remote station is a millimeter-wave remote station, and the second-band remote station is a 5.8GHz broadband wireless remote station.

[0024] like Figure 1 For a wireless communication system for remote vehicle control in a yard operation area, implemented for a mobile vehicle-side connection structure (i.e., a target vehicle), in some modified embodiments, it is possible to... Figure 1 Extending this further, a wireless communication system for remote vehicle control in the yard operation area is obtained, which addresses at least one (i.e., multiple) mobile vehicle-side connection structures (i.e., a target vehicle). Figure 3 The system network architecture diagram shown below will be discussed later. Figure 3 A detailed explanation is provided, including the following: like Figure 3 The diagram shows the connection relationships and data flow paths of the various devices. From bottom to top, the system network architecture includes a data acquisition layer, a base station layer, and a decision control layer. The data acquisition layer may include multiple mobile vehicle-side connection structures 3 (such as...). Figure 1 ),but Figure 3 Taking only two mobile vehicle-side connection structures 3 as an example; in the base station layer, a corresponding base station-side connection structure 2 is deployed for each mobile vehicle-side connection structure 3 (e.g., Figure 1 ); Deploy a central-side connection structure 1 (e.g., at the decision-making and control level) Figure 1 Furthermore, it should be noted that as the number of mobile vehicle-side connection structures 3 deployed in the data acquisition layer increases, in order to meet certain data processing efficiency requirements, this application embodiment may deploy, but is not limited to, a central-side connection structure 1 in the decision control layer. However, it is necessary to ensure that the correspondence between the central-side connection structure 1, the base station-side connection structure 2, and the mobile vehicle-side connection structure 3 in the data acquisition layer, the base station layer, and the decision control layer is clear. Below, with reference to example scenarios, the data acquisition layer, the base station layer, and the decision control layer will be explained and described respectively, including the following: The data acquisition layer corresponds to the mobile vehicle end. For each target vehicle, it uses onboard equipment to collect business-related data such as video stream data, control data, and information data. It uses the data communication established between the onboard equipment and the redundant switching terminal to summarize all the collected data information. Then, according to the redundant switching equipment, it connects to "5.8GHz broadband wireless remote station", "millimeter wave remote station A", and "millimeter wave remote station B" to realize parallel access of multi-band links. That is, according to the link switching command issued by the decision control layer, it further controls which channel the redundant switching terminal transmits data information to the central redundant switcher through.

[0025] The base station layer is designed to enable wireless transmission, including providing millimeter-wave links and 5.8GHz links.

[0026] For the "millimeter-wave link," each base station (such as base station 1) has "millimeter-wave base station A" and "millimeter-wave base station B" corresponding to a target vehicle's on-board "millimeter-wave remote station A" and "millimeter-wave remote station B," respectively, establishing a main transmission link through the 60GHz frequency band. Furthermore, for each base station (such as base station 1), this embodiment uses an "optical-electric switch" to convert the wireless signal into a wired signal and transmit it back to the "central redundancy switcher" in the central control room.

[0027] For the "5.8GHz link", the "5.8GHz broadband wireless base station" establishes a redundant backup link with the "5.8GHz broadband wireless remote station" on the vehicle via the 5.8GHz frequency band.

[0028] The decision control layer, serving as the central control unit of the system provided in this application embodiment, can communicate with external systems (such as a port machinery location system). The central redundant switcher receives link data from all base stations and simultaneously obtains the "port machinery location information" from the port machinery location system through the "external policy control interface." After processing by the "host computer," a "channel switching command" is generated and sent back to the central redundant switcher. This causes the central redundant switcher to generate a link switching command, which is then sent down to the mobile vehicle terminal through the base station layer. This enables control of the redundant switching terminal on each target vehicle to switch and select different channel transmission links to transmit service-related data information collected by the data acquisition layer.

[0029] Furthermore, regarding such Figure 1 To further explain the working principle of the "wireless communication system for remote vehicle control in yard operation areas" shown, this application also provides a wireless communication system method for remote vehicle control in yard operation areas, such as... Figure 4 As shown, the following implementation steps are provided in this embodiment of the application: 101. For target vehicles in the yard operation area, at least two first-band transmission links deployed for the target vehicle are used to synchronously transmit the collected business-related data information to the central redundancy switcher, so that the central redundancy switcher can select one of the at least two first-band transmission links to upload the data information on the target link to the target control platform.

[0030] It should be noted that, in order to distinguish different frequency bands, the embodiments of this application use the terms "first" and "second" for identification, namely, the first frequency band and the second frequency band. The purpose of using two frequency bands in the embodiments of this application is to use the "first frequency band" as the primary band and the "second frequency band" as a redundancy guarantee. For example, the first frequency band is a millimeter wave band, and the second frequency band is a broadband wireless band. The division of frequency band functions implemented by the "millimeter wave band" and the "5.8GHz band" is as follows: With "millimeter wave" as the mainstay: leveraging the large bandwidth characteristics of the 60GHz band, it undertakes high-bandwidth, low-latency services, such as multiple high-definition video streams and real-time control commands. A single base station provides an access capability of ≥1.8Gbps, meeting the high bandwidth requirements of port remote control scenarios.

[0031] Using "5.8GHz" as redundancy: leveraging its wide coverage and strong diffraction capability, it undertakes redundancy backup (taking over services when the millimeter-wave link fails) and relocation communication (basic connection when vehicles move between yards), providing 750Mbps of backup capacity to ensure uninterrupted service.

[0032] In step 101, with the "first frequency band" as the dominant factor, at least two first frequency band transmission links are used to synchronously transmit the collected service-related data information to the central redundant switch. This is to achieve "data dual-active" for the service-related data information collected by the on-board equipment of a target vehicle using these two frequency band transmission links. For example, the service-related data information collected by the on-board equipment of the target vehicle is transmitted simultaneously on the first frequency band transmission links formed by the two first frequency band remote stations.

[0033] Specifically, in combination with, for example Figure 1The system shown, comprising "central side connection structure 1, base station side connection structure 2, and mobile vehicle side connection structure 3," achieves the following: Redundant switching terminals are deployed on the target vehicle, simultaneously connecting to each first-band remote station and each second-band remote station (note that "first" and "second" are used as identifiers to distinguish remote stations in different frequency bands). Utilizing at least two first-band transmission links deployed on the target vehicle, the collected service-related data information is synchronously transmitted to the central redundant switcher. This includes: on the target vehicle, using the redundant switching terminals to aggregate the collected service-related data information; using the redundant switching terminals to synchronously distribute the data information to each first-band remote station; and using the first-band link formed by each first-band remote station and its corresponding first-band base station to transmit the data information to the central redundant switcher.

[0034] Furthermore, under the premise of achieving "data dual-active" by utilizing two first-band transmission links, the central redundant switch receives the "data dual-active" data information, and then the central redundant switch selects the data information on a target link to upload to the target control platform (i.e., the designated platform that requires business-related data information).

[0035] 102. Using the second frequency band transmission link deployed for the target vehicle, the collected status information of the second frequency band transmission link is transmitted to the central redundancy switch, so that the central redundancy switch can monitor the operation status of the second frequency band transmission link in real time; wherein, the second frequency band serves as a redundant backup working frequency band for the first frequency band to ensure that business-related data information is transmitted to the target control platform.

[0036] Step 102 describes the scenario where the second frequency band transmission link is not enabled for transmitting "service-related data information," such as... Figure 1 In the system shown, the "central side connection structure 1, base station side connection structure 2, and mobile vehicle side connection structure 3" utilize the second-band transmission link formed by the second-band remote station deployed in the "mobile vehicle side connection structure 3" and its corresponding second-band base station in the "base station side connection structure 2". This link status information, which enables real-time monitoring of the second-band transmission link itself, is transmitted to the central redundancy switch in the "central side connection structure 1". This allows the central redundancy switch to monitor the operating status of the second-band transmission link in real time, so that it can be activated at any time when the second-band transmission link is needed as a redundant backup link.

[0037] Steps 101-102 above describe the data transmission method implemented under normal operating conditions of the target vehicle in the yard operation area. The following example 1 is provided for explanation.

[0038] Example 1: Using "millimeter wave band" and "5.8GHz band" as examples, explain "data transmission under normal operating conditions": For example, three vehicles are moving and operating normally in the yard. The "wireless communication system for remote control of vehicles in the yard" activates a "millimeter-wave dual-active + 5.8GHz monitoring" mode. Each target vehicle transmits service-related data (such as control data and video data (bandwidth ≥ 300Mbps)) through two millimeter-wave links (load-sharing). At the same time, the 5.8GHz link only transmits a small amount of management data such as heartbeat packets as a redundancy backup. After the central redundancy switch aggregates the dual millimeter-wave data, it selectively uploads it to the control core network to ensure stable transmission of high-bandwidth services.

[0039] 103. When it is predicted that the target vehicle is about to move to another work area based on the target vehicle's driving trajectory, or when it is predicted that the target vehicle is about to enter the coverage blind spot of the first frequency band, a channel switching command is issued to the central redundant switcher. The cross-frequency band switching command includes the cross-frequency band switching strategy corresponding to different predictions of the target vehicle.

[0040] Step 103 describes the specific implementation methods for enabling the second frequency band transmission link to achieve "data transmission guarantee" in two different scenarios. The following provides illustrative explanations of the two different scenarios.

[0041] One scenario is "communication assurance for target vehicles during relocation and street crossings" in a yard operation area. The essence of this scenario is that the movement of the target vehicle necessitates a switch in frequency band channels, i.e., a pre-switch to a "second frequency band" to ensure uninterrupted continuous monitoring of the target vehicle. The implementation scenario involves the target vehicle relocating to another operation area, crossing a millimeter-wave coverage blind spot. Example 2 is provided below for explanation.

[0042] Example 2: Using "millimeter wave band" and "5.8GHz band" as examples, explain why "the target vehicle needs to be moved to another work area, crossing the millimeter wave coverage blind spot": The "Wireless Communication System for Remote Vehicle Control in Yard Operation Areas" initiates a "pre-switching + 5.8GHz Guarantee" mechanism. By predicting movement trajectories through external policy control interfaces (such as port machinery positioning systems), the system switches the primary communication network to 5.8GHz in advance. During the relocation process, 5.8GHz provides at least 50Mbps of basic bandwidth to ensure uninterrupted control commands, while video surveillance is transmitted at a low frame rate (to reduce the load on non-critical services). Upon entering the new operation area, the system automatically reconnects to the millimeter-wave network, restoring high-speed communication of ≥1.8Gbps.

[0043] Another scenario is "data transmission assurance" achieved through intelligent switching based on external commands. The essence of this scenario is that due to the impending entry into the "first frequency band coverage blind zone," causing the "first frequency band signal to disappear," a frequency band channel switch is required, i.e., a pre-emptive switch to the "second frequency band" is needed to ensure uninterrupted continuous monitoring of the target vehicle. The implementation scenario is: the target vehicle is about to enter the first frequency band coverage blind zone according to "external commands" (such as a work plan), requiring a pre-emptive link switch. Example 3 is provided below for explanation.

[0044] Example 3: Taking "millimeter wave band" and "5.8GHz band" as examples, explain why "the target vehicle is about to enter the coverage blind spot of the first frequency band and needs to switch links in advance": The "Wireless Communication System for Remote Vehicle Control in Yard Operation Areas" initiates an "Externally Strategy-Driven Pre-Switching" mechanism. The port machinery positioning system sends location information to the host computer, which, combined with the yard map and base station locations, formulates a switching strategy and issues a channel switching command to the central redundant switcher. The central redundant switcher triggers a switch to the 5.8GHz link 50ms in advance, while simultaneously prioritizing the control command link (dynamically adjusting video bandwidth) according to the operation plan (i.e., external commands). When the target vehicle leaves the "millimeter-wave band" blind zone, the system automatically restores the millimeter-wave link, requiring no manual intervention throughout the entire process, achieving an intelligent closed loop of "prediction-switching-recovery".

[0045] In step 103, the central redundancy switcher receives a "channel switching instruction," which is generated by the upper-level central processing terminal (such as a host computer) based on data information obtained from the "port machinery positioning system" and other data information obtained through external interfaces, through relevant calculations. For example,... Figure 5 As shown, the following specific implementation methods are provided: 201-205; 201. Use the host computer to obtain the target vehicle's location information, driving status information, yard map information, the location information of the first base station corresponding to each first frequency band transmission link, and the location information of the second station corresponding to the second frequency band transmission link.

[0046] 202. Based on the target vehicle's location information, driving status information, and yard map information, use the host computer to predict the target vehicle's driving trajectory.

[0047] 203. Based on the target vehicle's driving trajectory, the location information of the first base station corresponding to each first frequency band transmission link, and the location information of the second base station corresponding to the second frequency band transmission link, predict the target vehicle's driving scenario and the buffer time corresponding to the driving scenario. The driving scenario includes at least the target vehicle about to move to another work area, or the target vehicle about to enter the coverage blind spot of the first frequency band.

[0048] 204. Based on the target vehicle's driving scenario and the corresponding buffer time, the host computer generates a cross-band switching strategy for each driving scenario.

[0049] 205. Based on the cross-frequency band switching strategy corresponding to each driving scenario, the host computer generates the channel switching instruction corresponding to the target vehicle.

[0050] For 201-205, combined with the explanations of Examples 2 and 3 above, it can be seen that 203, "based on the target vehicle's driving trajectory, the location information of the first base station corresponding to each first frequency band transmission link, and the location information of the second base station corresponding to the second frequency band transmission link," can further predict the target vehicle's driving scenario. For example, the target vehicle is about to move to another work area (Example 2), or it is predicted that the target vehicle is about to enter the coverage blind spot of the first frequency band (Example 3). Furthermore, based on the prediction of different driving scenarios, and further based on the target vehicle's driving trajectory and driving status (such as speed and acceleration), the buffer time (i.e., how long it will take to occur) of the "driving scenario" can be further predicted, so as to further predict the urgency of switching transmission links on the target vehicle side. Therefore, in Embodiment 205 of this application, the cross-frequency band switching strategy in the "channel switching instruction" is generated based on the two factors of "the target vehicle's driving scenario and the buffer time corresponding to the driving scenario," so that the system can intervene in a timely manner according to such a "channel switching instruction" to determine which transmission link to use to transmit service-related data information.

[0051] 104. According to the cross-band switching strategy, the central redundant switcher generates a link switching command and issues it to the target vehicle, so that the target vehicle switches to the second frequency band transmission link to transmit the collected service-related data information to the central redundant switcher, so that the central redundant switcher can upload the data information to the target control platform.

[0052] After generating the "channel switching instruction," it is sent to the central redundant switcher. The central redundant switcher then generates a link switching instruction based on the cross-frequency band switching strategy in the "channel switching instruction." Specifically, this may include the following implementation steps: By analyzing the cross-band handover strategy, the central redundant switcher determines the driving scenario and handover requirements corresponding to the target vehicle. Based on the driving scenario and handover requirements, the central redundant switcher generates a link handover command, which includes the trigger timing. The central redundant switcher sends the link handover command to the redundant switching terminal on the target terminal. Based on the trigger timing included in the link handover command, the redundant switching terminal distributes service-related data to the second-band remote station. The data is then transmitted to the central redundant switcher using the second-band link formed by each second-band remote station and its corresponding second-band base station.

[0053] In some modified embodiments, after step 101 determines that the central redundancy switch selects one target link from at least two first-band transmission links to upload data information to the target control platform, if the central redundancy switch evaluates that the quality of the data information transmitted via the target link is substandard, a new target link is selected from the remaining first-band transmission links; and the data information on the new target link is uploaded to the target control platform. Specifically, the following example 4 is used for explanation: Example 4: Using "millimeter wave band" and "5.8GHz band" as examples, explain "millimeter wave link interruption and fast handover"; the scenario is: "A vehicle moves to the back of the container stacking area, and a single millimeter wave base station is blocked."

[0054] The "Wireless Communication System for Remote Vehicle Control in Yard Operation Areas" triggers a "0ms Handover within Millimeter Wave" mechanism. The central redundant switch monitors link quality (latency, packet loss rate) in real time. When signal degradation is detected on one millimeter wave link, the system immediately switches services to another millimeter wave link (0ms handover time). Because the dual millimeter wave links operate on a "load-sharing + hot backup" basis, the service remains unaffected after the handover, and video and control commands continue to function smoothly. Simultaneously, the system initiates self-recovery detection for the blocked link, automatically restoring the dual-link state once the blockage is removed.

[0055] Furthermore, in some modified embodiments, if the central redundancy switcher evaluates the data information on each first frequency band transmission link and determines that the data transmission quality of each first frequency band transmission link is substandard, the central redundancy switcher generates a channel switching command. The central redundancy switcher sends the channel switching command to the redundant switching terminal on the target terminal. Based on the command triggering timing included in the channel switching command, the redundant switching terminal distributes service-related data information to the second frequency band remote station. The data information is then transmitted to the central redundancy switcher using the second frequency band link formed by each second frequency band remote station and its corresponding second frequency band base station. Specifically, Example 5 is used for explanation: Example 5: Taking "millimeter wave band" and "5.8GHz band" as examples, explain "cross-band redundancy handover guarantee"; the scenario provided is: continuous vehicle movement causes signal degradation in both millimeter wave links.

[0056] The "wireless communication system for remote vehicle control in the yard operation area" triggers a "50ms cross-band switching" mechanism. When both millimeter-wave links are unavailable, the central redundant switcher decides to switch to the 5.8GHz link within 50ms. At this time, the 5.8GHz band handles all service data transmission, and the bandwidth is adjusted to 150Mbps (prioritizing critical services such as control commands). After the vehicle moves out of the obstruction area and the millimeter-wave link is restored, the system automatically switches back to the millimeter-wave channel to resume high-bandwidth transmission.

[0057] In summary, the embodiments of this application provide a wireless communication method and system for remote control of vehicles in yard operation areas. It uses multi-band intelligent switching and cooperation. Because the multi-band adopted is a fusion of "millimeter wave band" and "wideband wireless band", the wireless communication solution provided by this application can not only make full use of the large bandwidth and low latency characteristics of millimeter wave as the backbone of data transmission, but also integrate the advantages of wide coverage and good mobility of wireless communication as a guarantee for seamless switching, thereby constructing a highly reliable, high-capacity, and continuously covered mobile vehicle remote control communication network.

[0058] This application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the wireless communication method for remote vehicle control in a yard operation area as described above.

[0059] This application provides an electronic device, which includes at least one processor, at least one memory and a bus connected to the processor; wherein the processor and the memory communicate with each other through the bus; the processor is used to call program instructions in the memory to execute the wireless communication method for remote control of vehicles in the yard operation area as described above.

[0060] This application also provides a computer program product that, when executed on a data processing device, is adapted to perform a program that initializes a wireless communication method for remotely controlling vehicles in a yard operation area.

[0061] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1A device that provides the functions specified in one or more boxes.

[0062] In a typical configuration, the device includes one or more processors (CPUs), memory, and a bus. The device may also include input / output interfaces, network interfaces, etc.

[0063] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and memory includes at least one memory chip. Memory is an example of computer-readable media.

[0064] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0065] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0066] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0067] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A wireless communication method for remote vehicle control in a yard operation area, characterized in that, The method includes: For a target vehicle in the yard operation area, at least two first-band transmission links deployed for the target vehicle are used to synchronously transmit the collected business-related data information to the central redundancy switcher, so that the central redundancy switcher selects one of the at least two first-band transmission links to upload the data information on the target link to the target control platform. The target vehicle is equipped with a redundant switching terminal, which simultaneously connects to each first-band remote station and each second-band remote station. The process of synchronously transmitting the collected service-related data to the central redundant switcher using at least two first-band transmission links deployed on the target vehicle includes: on the target vehicle, using the redundant switching terminal to aggregate the collected service-related data; using the redundant switching terminal to synchronously distribute the data to each first-band remote station; and using the first-band link formed by each first-band remote station and its corresponding first-band base station to transmit the data to the central redundant switcher. The status information of the second frequency band transmission link deployed for the target vehicle is transmitted to the central redundancy switch, enabling the central redundancy switch to monitor the operation status of the second frequency band transmission link in real time. The first frequency band is a millimeter wave band, the second frequency band is a broadband wireless band, and the second frequency band serves as a redundant backup working frequency band for the first frequency band to ensure that business-related data information is transmitted to the target control platform. When the host computer predicts, based on the target vehicle's driving trajectory, that the target vehicle is about to move to another work area, or predicts that the target vehicle is about to enter the coverage blind spot of the first frequency band, the host computer sends a channel switching command to the central redundancy switcher. The channel switching command includes cross-frequency band switching strategies corresponding to different predictions of the target vehicle. The host computer is pre-deployed to send the channel switching command to the central redundancy switcher. According to the cross-frequency band switching strategy, the central redundant switcher generates a link switching command and issues it to the target vehicle, so that the target vehicle switches to use the second frequency band transmission link to transmit the collected service-related data information to the central redundant switcher, so that the central redundant switcher uploads the data information to the target control platform. The process includes: according to the cross-band handover strategy, the central redundant switcher generates a link handover command and issues it to the target vehicle, so that the target vehicle switches to using the second frequency band transmission link to transmit the collected service-related data information to the central redundant switcher. This includes: by parsing the cross-band handover strategy, the central redundant switcher determines the driving scenario corresponding to the target vehicle and the handover requirements corresponding to the driving scenario; according to the driving scenario and the handover requirements corresponding to the driving scenario, the central redundant switcher generates a link handover command, which includes a command triggering timing; the central redundant switcher issues the link handover command to the redundant switching terminal on the target terminal; according to the command triggering timing included in the link handover command, the redundant switching terminal distributes the service-related data information to the second frequency band remote station; and using the second frequency band link composed of each second frequency band remote station and its corresponding second frequency band base station, the data information is transmitted to the central redundant switcher.

2. The method according to claim 1, characterized in that, After determining that the central redundancy switcher selects one of at least two first-band transmission links to upload data information on a target link to the target control platform, the method further includes: If the central redundancy switch evaluates that the quality of the data information transmitted through the target link is not up to standard, then a new target link is selected from the remaining first frequency band transmission links. The data information on the new target link is uploaded to the target control platform.

3. The method according to claim 2, characterized in that, If, after evaluating the data information on each first frequency band transmission link, the central redundancy switch determines that the data transmission quality of each first frequency band transmission link is substandard, then the method further includes: The central redundancy switcher generates channel switching instructions; The central redundancy switcher sends the channel switching command to the redundancy switching terminal on the target terminal; According to the channel switching instruction including the instruction triggering timing, the redundant switching terminal distributes service-related data information to the remote station of the second frequency band; The data information is transmitted to the central redundant switch using the second frequency band link formed by each second frequency band remote station and its corresponding second frequency band base station.

4. The method according to claim 1, characterized in that, The method further includes: The host computer is used to obtain the target vehicle's location information, driving status information, yard map information, the location information of the first base station corresponding to each first frequency band transmission link, and the location information of the second station corresponding to the second frequency band transmission link; Based on the target vehicle's location information, driving status information, and yard map information, the host computer predicts the target vehicle's driving trajectory. Based on the target vehicle's driving trajectory, the location information of the first base station corresponding to each first frequency band transmission link, and the location information of the second base station corresponding to the second frequency band transmission link, the driving scenario of the target vehicle and the buffer time corresponding to the driving scenario are predicted. The driving scenario includes at least the target vehicle about to move to another work area, or the target vehicle is predicted to enter the coverage blind spot of the first frequency band. Based on the target vehicle's driving scenario and the corresponding buffer time, the host computer generates a cross-frequency band switching strategy for each driving scenario. Based on the cross-frequency band switching strategy corresponding to each driving scenario, the host computer generates the channel switching instruction corresponding to the target vehicle.

5. The method according to claim 1, characterized in that, The first frequency band is a millimeter wave band, and the second frequency band is a 5.8 GHz band.

6. A wireless communication system for remote vehicle control in a yard operation area, characterized in that, The system, applied to the method as described in any one of claims 1 to 5, comprises: a central-side connection structure, a base station-side connection structure, and a mobile vehicle-side connection structure; The central-side connection structure includes: a port machinery location positioning system functional unit, a host computer, and a central redundancy switch; the port machinery location positioning system functional unit transmits the collected port machinery location information to the host computer; the host computer formulates a channel switching strategy based on the location information, yard terrain, and base station layout, generates a channel switching command, and sends it to the central redundancy switch; the central redundancy switch, as the system decision center, receives the channel switching command and sends a link switching command to the base station-side connection structure and the mobile vehicle-side connection structure; The base station-side connection structure includes: a second frequency band base station, and a base station group consisting of at least two first frequency band base stations and an optoelectronic switch; the optoelectronic switch is used to aggregate the wireless data of each first frequency band base station; the second frequency band base station and the base station group transmit their respective wireless data to the central redundancy switcher, and simultaneously receive the link switching command from the central redundancy switcher and forward it to the mobile vehicle-side connection structure; The mobile vehicle-side connection structure includes: at least two first-band remote stations, a second-band remote station, a redundant switching terminal, and vehicle-mounted equipment; the redundant switching terminal establishes data communication with the first-band remote station, the second-band remote station, and the vehicle-mounted equipment respectively, so as to receive and summarize the service-related data information collected by the vehicle-mounted equipment, and distribute the data information to different frequency band remote stations according to the link switching instructions issued by the central redundant switcher.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements a wireless communication method for remote vehicle control in a yard work area as described in any one of claims 1-5.

8. An electronic device, characterized in that, The device includes at least one processor, and at least one memory and bus connected to the processor; The processor and the memory communicate with each other via the bus. The processor is used to call program instructions in the memory to execute a wireless communication method for remote vehicle control in a yard operation area as described in any one of claims 1-5.

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