Vehicle-mounted communication device and system, vehicle-mounted antenna switching method and storage medium

Abstract

The invention discloses a vehicle-mounted communication device and system, a vehicle-mounted antenna switching method and a storage medium. The device comprises a plurality of vehicle-mounted antennas which comprise a main antenna and at least one auxiliary antenna; the radio frequency switch comprises a first communication end, a channel control end and a plurality of second communication ends, the vehicle-mounted antennas are connected with different second communication ends, and the second communication ends connected with the interior of the first communication end are switched based on switching instructions received by the channel control end; the communication module is connected with a first communication end and a channel control end of the radio frequency switch circuit and is used for sending an enable signal to the first communication end to drive a corresponding vehicle-mounted antenna to work, acquiring a signal strength parameter of the corresponding vehicle-mounted antenna from the first communication end, and sending the signal strength parameter to the channel control end when the signal strength parameter does not meet a preset communication quality condition; and sending a switching instruction to the channel control end. Through the device, the vehicle-mounted antenna can be quickly and adaptively switched, multiplexing of the vehicle-mounted antenna is realized, and stability and reliability of vehicle-mounted communication are ensured.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle-mounted devices, and in particular to a vehicle-mounted communication device, a system, a vehicle-mounted antenna switching method, and a storage medium. Background Art

[0002] With the development of vehicle intelligence and networking, vehicles are increasingly relying on communication technologies such as mobile communication, vehicle networking, satellite communication, or emergency call. The implementation of these communication technologies requires the use of multiple vehicle-mounted antennas corresponding to different systems.

[0003] Currently, the antennas of vehicle-mounted devices usually adopt a multi-antenna independent design. Different functional scenarios, such as data transmission, emergency call, MIMO (Multiple Input Multiple Output) communication, etc., require separate configuration of different dedicated antennas, resulting in redundant antenna quantity and complex layout. If an antenna is affected by the external environment, such as impact, corrosion, etc., resulting in damage or destruction, the related communication function will be restricted to varying degrees, thereby reducing the fluency and timeliness of the use of the related vehicle-mounted communication device, making the related vehicle-mounted communication device unable to effectively and reliably execute the corresponding communication function. In extreme cases, if the antenna fails and causes a communication interruption, the information of vehicle failure and accident cannot be reported in time, which may even endanger the driving safety and the lives of passengers. Summary of the Invention

[0004] The present application mainly provides a vehicle-mounted communication device, a system, a vehicle-mounted antenna switching method, and a storage medium, aiming to solve the problem of poor reliability of vehicle-mounted communication.

[0005] To solve the above technical problems, the technical solution adopted by the present application is: providing a vehicle-mounted communication device. The vehicle-mounted communication device includes: a plurality of vehicle-mounted antennas, including a main antenna and at least one sub-antenna; a radio frequency switch, including a first communication end, a channel control end, and a plurality of second communication ends. Each of the vehicle-mounted antennas is connected to a different second communication end. The radio frequency switch internally connects the first communication end to the second communication end corresponding to the main antenna by default, and based on a switching instruction received by the channel control end, switches the second communication end internally connected to the first communication end; a communication module, connected to the first communication end and the channel control end of the radio frequency switch circuit, for sending an enabling signal to the first communication end to drive the corresponding vehicle-mounted antenna to work, obtaining a signal strength parameter of the corresponding vehicle-mounted antenna from the first communication end, and sending the switching instruction to the channel control end when the signal strength parameter does not meet a preset communication quality condition.

[0006] In some embodiments, the communication module is further configured to: poll the signal strength parameter of the target polling antenna, where the target polling antenna is the vehicle-mounted antenna for which it has been confirmed that the signal strength parameter does not meet the preset communication quality condition; when the signal strength parameter of the target polling antenna meets the preset communication quality condition again, allow the first communication end to connect to the second communication end corresponding to the target polling antenna again; after polling the target polling antenna a preset number of times, if the signal strength parameter of the target polling antenna still does not meet the preset communication quality condition, generate abnormal status information corresponding to the vehicle-mounted antenna.

[0007] In some embodiments, the communication module is further configured to connect to the terminal main control and report the generated abnormal status information to the terminal main control for the terminal main control to generate an abnormal warning based on the abnormal status information.

[0008] In some embodiments, the vehicle-mounted communication device is further configured to connect to a display and map the signal strength parameter of the vehicle-mounted antenna onto the display.

[0009] In some embodiments, the signal strength parameter includes at least one of reference signal receiving quality, reference signal receiving power, and signal-to-noise ratio; the communication module is further configured to: determine that the signal strength parameter does not meet the preset communication quality condition when the reference signal receiving quality is lower than a preset receiving quality threshold, and / or the reference signal receiving power is lower than a preset receiving power threshold, and / or the signal-to-noise ratio is lower than a preset signal-to-noise ratio threshold.

[0010] In some embodiments, the switching time of the RF switch is less than 10 ms, and the isolation of the RF switch is greater than 25 dB.

[0011] To solve the above technical problems, another technical solution adopted by this application is: to provide a vehicle-mounted communication system, which includes: the vehicle-mounted communication device as described above; a terminal main control, connected to the communication module of the vehicle-mounted communication device, for receiving the information reported by the communication module and processing the information reported by the communication module; a display, connected to the communication module of the vehicle-mounted communication device, for mapping and displaying the signal strength parameter of the vehicle-mounted antenna in the vehicle-mounted communication device.

[0012] To solve the above technical problems, another technical solution adopted by this application is: to provide a vehicle-mounted antenna switching method, which is applied to the communication module of the vehicle-mounted communication device as described above. The vehicle-mounted antenna switching method includes: controlling the RF switch to connect to the main antenna; monitoring the signal strength parameter of the main antenna; when the signal strength parameter of the main antenna does not meet the preset communication quality condition, controlling the RF switch to connect to the secondary antenna; and controlling the vehicle-mounted antenna connected to the RF switch based on the signal strength parameter of the secondary antenna.

[0013] In some embodiments, after controlling the RF switch to connect to the secondary antenna when the signal strength parameter of the main antenna does not meet the preset communication quality condition, it further includes: polling the signal strength parameter of the main antenna; if the signal strength parameter of the main antenna meets the preset communication quality condition again, controlling the RF switch to connect to the main antenna; after polling the main antenna a preset number of times, if the signal strength parameter of the main antenna still does not meet the preset communication quality condition, generating abnormal state information corresponding to the main antenna.

[0014] To solve the above technical problems, another technical solution adopted by this application is: to provide a storage medium, on which program data is stored. The program data, when executed by a processor, implements the steps of the vehicle-mounted antenna switching method as described above.

[0015] The beneficial effects of this application are as follows: Different from the prior art, this application discloses a vehicle-mounted communication device, system, vehicle-mounted antenna switching method and storage medium. By setting multiple vehicle-mounted antennas and using an RF switch and a communication module to achieve intelligent switching between vehicle-mounted antennas, when the signal strength parameter of one vehicle-mounted antenna does not meet the preset communication quality condition, the communication module can automatically switch to other vehicle-mounted antennas for communication. This intelligent switching and abnormal handling mechanism can ensure that the vehicle-mounted device maintains a stable communication connection in various communication scenarios, effectively improving the reliability and safety of the vehicle-mounted communication device, reducing the risk of communication interruption caused by antenna failures, and providing a strong guarantee for driving safety and the safety of passengers' lives. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings, where:

[0017] Figure 1 It is a schematic structural diagram of an embodiment of the vehicle-mounted communication device provided by this application;

[0018] Figure 2 It is a schematic structural diagram of an embodiment of the vehicle-mounted communication system provided by the present application;

[0019] Figure 3 It is a schematic flowchart of an embodiment of the vehicle-mounted antenna switching method provided by the present application;

[0020] Figure 4 It is a schematic structural diagram of an embodiment of the storage medium provided by the present application. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0022] The terms "first", "second", and "third" in the embodiments of the present application are only for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with "first", "second", and "third" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products, or devices.

[0023] Referring to "embodiment" herein means that the specific features, structures, or characteristics described in connection with the embodiment may be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0024] The present application provides a vehicle-mounted communication device. Refer to Figure 1 , Figure 1FIG. 0 is a schematic structural diagram of an embodiment of an in-vehicle communication device 100 provided by the present application. The in-vehicle communication device 100 includes: a plurality of in-vehicle antennas 110, including a main antenna 111 and at least one sub-antenna 112; a radio frequency switch 120, including a first communication end 121, a channel control end 122, and a plurality of second communication ends 123. Each in-vehicle antenna 110 is connected to a different second communication end 123. The radio frequency switch 120 internally connects the first communication end 121 to the second communication end 123 corresponding to the main antenna 111 by default, and switches the second communication end 123 internally connected to the first communication end 121 based on a switching instruction received by the channel control end 122; a communication module 130, connected to the first communication end 121 and the channel control end 122 of the radio frequency switch 120 circuit, for sending an enable signal to the first communication end 121 to drive the corresponding in-vehicle antenna 110 to work, obtaining the signal strength parameter of the corresponding in-vehicle antenna 110 from the first communication end 121, and sending a switching instruction to the channel control end 122 when the signal strength parameter does not meet the preset communication quality condition.

[0025] In this embodiment, the in-vehicle communication device 100 refers to a device installed on a vehicle for enabling communication between the vehicle and an external communication network or other vehicles. The in-vehicle communication can support a variety of different communication systems, such as 5G (5th Generation Mobile Communication Technology), 4G (4th Generation Mobile Communication Technology), and 3G (3th Generation Mobile Communication Technology) and other mobile communication technologies, as well as one or more of the communication systems corresponding to communication technologies such as vehicle-to-everything (V2X), satellite communication, or emergency call. The in-vehicle communication device 100 can specifically be an on-board unit (OBU), a telematics box (T-BOX), an in-vehicle gateway, or an integrated antenna system, etc.

[0026] In this embodiment, the vehicle-mounted communication device 100 receives and transmits communication signals through the vehicle-mounted antenna 110. The vehicle-mounted antenna 110 can specifically be a 5G antenna, a 4G antenna, or a 3G antenna for mobile communication, a C-V2X (Cellular-Vehicle to Everything) antenna or a DSRC (Dedicated Short Range Communications) antenna for vehicle-to-everything communication, a GNSS (Global Navigation Satellite System) antenna for satellite communication, an eCall (Emergency Call) antenna for emergency calls, etc. The vehicle-mounted antenna 110 includes a main antenna 111 and at least one sub-antenna 112. The main antenna 111 is a multi-band integrated antenna that by default undertakes core communication tasks, while the sub-antenna 112 is used to assist the main antenna 111 for redundancy backup or MIMO diversity antenna. For example, when the main antenna 111 is a 5G antenna, the sub-antenna 112 can be a 4G antenna or a 3G antenna. When the 5G signal is weak or unavailable, the vehicle-mounted communication device 100 can switch to the 4G antenna or the 3G antenna for communication to ensure the continuity and stability of communication. The sub-antenna 112 is distributed in different areas of the vehicle body to cover signal blind spots or handle failures of the main antenna 111.

[0027] In this embodiment, these vehicle-mounted antennas 110 can specifically be distributed in different areas of the vehicle according to the vehicle body structure. For example, the antennas for cellular communication and satellite communication are set on the roof to facilitate signal coverage and reduce the shielding effect of the metal structure, and the antennas for vehicle-to-everything communication are set in the rearview mirror to improve the forward coverage range and facilitate interaction with roadside units and vehicles. This application does not make specific restrictions on this. In the traditional vehicle-mounted communication device 100, the vehicle-mounted antenna 110 is usually directly led out from the communication module 130, that is, each vehicle-mounted antenna 110 is an independent design. When it is necessary to automatically change the communication system or actively switch the antenna according to the setting, it is necessary to manually replace the antenna or adjust the setting of the communication module 130. This is not only cumbersome to operate, but also cannot respond quickly in an emergency, affecting driving safety. However, for the vehicle-mounted communication device 100 provided in this application, by introducing the radio frequency switch 120 and setting the radio frequency switch 120 between the vehicle-mounted antenna 110 and the communication module 130, it is used to switch the connection between the vehicle-mounted antenna 110 and the communication module 130 to achieve intelligent switching between the vehicle-mounted antennas 110.

[0028] In this embodiment, the radio frequency switch 120 is a component that dynamically switches radio frequency signal paths through an electrically controlled signal. Its structure includes a first communication end 121, a channel control end 122, and multiple second communication ends 123. Among them, the first communication end 121 is a port for connecting the radio frequency signal input and output of the communication module 130, and is used to transmit the radio frequency signal generated by the communication module 130 to the antenna for information transmission or receive external signals captured by the antenna. The channel control end 122 is a logical interface for receiving switching instructions from the communication module 130, and is used to parse the control signal and drive the internal circuit of the radio frequency switch 120 to switch the conduction path, and adjust the second communication end 123 that is communicatively connected to the first communication end 121. The second communication ends 123 are respectively physically connected to different vehicle-mounted antennas 110. By switching the conduction state of the radio frequency switch 120, the currently activated antenna channel is dynamically selected, and a connection is established between the antenna corresponding to the corresponding antenna channel and the communication module 130, so that the communication module 130 can communicate with an external communication network or other vehicles through the corresponding antenna. The radio frequency switch 120 defaults to conducting the first communication end 121 and the second communication end 123 corresponding to the main antenna 111 to form a main communication link, and switches the second communication end 123 internally connected to the first communication end 121 according to the received switching instruction to switch to other vehicle-mounted antennas 110 for communication. Similarly, when the radio frequency switch 120 switches to the first communication end 121 and the second communication end 123 corresponding to the secondary antenna 112 being conducted, it will also switch back to the main antenna 111 or other secondary antennas 112 for communication according to the switching instruction to ensure the continuity and stability of communication.

[0029] In this embodiment, the communication module 130 (Communication Module) is the core control and data processing unit of the vehicle-mounted communication device 100. It is connected to the first communication end 121 and the channel control end 122 of the RF switch 120 circuit. By sending an enable signal to the first communication end 121, it activates the corresponding vehicle-mounted antenna 110 to work, and receives the external signal captured by the vehicle-mounted antenna 110 or the communication signal sent from the first communication end 121, and then demodulates and decodes the signal to restore the original information, or encodes and modulates the information to be sent to generate a radio frequency signal and sends it out through the corresponding vehicle-mounted antenna 110. Specifically, the communication module 130 can be connected to the first communication end 121 of the RF switch 120 through an ANT (Antenna) interface, and connected to the channel control end 122 of the RF switch 120 through digital control interfaces such as MIPI (Mobile Industry Processor Interface) or GPIO (General Purpose Input / Output). By sending high and low levels or protocol instructions, it determines the internal switching conduction path of the RF switch 120 to achieve dynamic selection of the antenna channel and reconstruction of the communication link.

[0030] In this embodiment, the communication module 130 is also responsible for monitoring the signal strength parameters of the corresponding vehicle-mounted antenna 110 obtained from the first communication end 121. These signal strength parameters can reflect the communication quality between the current vehicle-mounted antenna 110 and the external communication network, such as the Reference Signal Receiving Quality (RSRQ), the Reference Signal Receiving Power (RSRP), and the Signal to Noise Ratio (SNR), etc. After the communication module 130 obtains these signal strength parameters, it will compare them with the preset communication quality conditions. The preset communication quality conditions can specifically refer to the threshold of a single parameter, the threshold determined by a combination of multiple parameters, or the threshold dynamically adjusted according to the scenario. For example, when the preset communication quality conditions are met, the reference signal receiving power needs to be greater than a certain threshold, or the reference signal receiving quality, the reference signal receiving power, and the signal to noise ratio all need to be greater than a certain threshold, or in a normal scenario, the reference signal receiving power needs to be greater than a certain threshold, while in an emergency call scenario, the reference signal receiving power needs to be greater than another set threshold, etc. If the signal strength parameters do not meet the preset communication quality conditions, it is determined that the signal quality of the current vehicle-mounted antenna 110 is poor. The communication module 130 will send a switching instruction to the RF switch 120 through the channel control end 122, drive the RF switch 120 to switch to the standby antenna channel, and at the same time start a polling detection mechanism to periodically backtest the status of the original antenna, so as to achieve seamless switching and fault self-healing of the communication link.

[0031] In this embodiment, the communication module 130 can specifically be an automotive-grade communication module. An automotive-grade communication module refers to a communication module that meets the automotive electronics reliability standards, such as the AEC-Q100 certification. Automotive-grade communication modules usually integrate multi-mode baseband chips, RF front-ends, and embedded processors, and can operate stably in a wide temperature environment and high vibration conditions. They usually support multi-mode communications such as 5G / 4G / 3G, V2X, GNSS, etc., and ensure communication reliability in critical scenarios through functional safety certification. The hardware design of these modules usually adopts redundant power management and electromagnetic compatibility optimization technologies to ensure accurate control of the switching action of the RF switch 120 in a complex electromagnetic environment. In addition, automotive-grade communication modules usually also have a built-in security encryption engine, which can perform end-to-end encryption and integrity verification on V2X messages to prevent the communication link from being maliciously attacked or data tampered with. By using these automotive-grade communication modules as the communication module 130, the strict requirements for communication performance and security of the vehicle-mounted communication device 100 can be met, ensuring stable and reliable communication of the vehicle in various complex environments.

[0032] This embodiment can refer toFigure 1 For example, Figure 1 In Figure 1 , taking the vehicle-mounted antenna 110 including a main antenna 111 and three sub-antennas 112a, 112b, and 112c as an example, the second communication end 123 of the RF switch 120 includes 123a, 123b, 123c, and 123d. 123a is connected to the main antenna 111, 123b is connected to the corresponding sub-antenna 112a, 123c is connected to the corresponding sub-antenna 112b, and 123d is connected to the corresponding sub-antenna 112c. By default, it internally connects the first communication end 121 to the second communication end 123a corresponding to the main antenna 111 to form a main communication link. At this time, the communication module 130 activates the main antenna 111 to work by sending an enable signal to the first communication end 121, and the main antenna 111 starts to receive or send communication signals. The communication module 130 receives the external signals captured by the main antenna 111 or the communication signals sent from the first communication end 121, and performs demodulation, decoding, etc. on them, or encodes, modulates, etc. the information to be sent, generates a radio frequency signal and sends it out through the main antenna 111.

[0033] In this embodiment, the communication module 130 also monitors the signal strength parameter of the corresponding main antenna 111 obtained from the first communication end 121 to evaluate the communication quality between the current main antenna 111 and the external communication network. If the signal strength parameter meets the preset communication quality condition, the communication module 130 maintains the current communication link unchanged; if the signal strength parameter does not meet the preset communication quality condition, it is determined that the signal quality of the current main antenna 111 is poor and cannot meet the communication requirements. At this time, the communication module 130 will send a switching instruction to the RF switch 120 through the channel control end 122, and the switching instruction carries the identification information of the target antenna. After receiving the switching instruction, the RF switch 120 analyzes the target antenna identification information in the switching instruction and switches the second communication end 123 internally connected to the first communication end 121 to the second communication end 123 corresponding to the target antenna, such as switching to the second communication end 123 corresponding to the sub-antenna 112, to communicate through the sub-antenna 112. Similarly, when the RF switch 120 switches to conduct the first communication end 121 and the second communication end 123 corresponding to the sub-antenna 112, if the signal strength parameter of the sub-antenna 112 also does not meet the preset communication quality condition, the communication module 130 will send a switching instruction to the RF switch 120 again through the channel control end 122, switch to other sub-antennas 112 such as sub-antenna 112 or sub-antenna 112 for communication, or switch back to the main antenna 111 for communication, and so on, until a vehicle-mounted antenna 110 that meets the preset communication quality condition is found.

[0034] In this embodiment, by setting multiple vehicle-mounted antennas 110 and using a radio frequency switch 120 and a communication module 130 to achieve intelligent switching between the vehicle-mounted antennas 110, when the signal strength parameter of one vehicle-mounted antenna 110 does not meet the preset communication quality condition, the communication module 130 can automatically switch to other vehicle-mounted antennas 110 for communication through self-checking, realizing intelligent path switching and dynamic optimization. This intelligent switching and exception handling mechanism can ensure that the vehicle-mounted device maintains a stable communication connection in various communication scenarios, effectively improving the reliability and safety of the vehicle-mounted communication device 100, reducing the risk of communication interruption caused by antenna failures, providing strong protection for driving safety and the safety of passengers' lives, and providing a highly reliable and full-scenario communication infrastructure support for intelligent connected vehicles. This device implements a dynamic channel state evaluation and adaptive optimization mechanism similar to the SRS (Sounding Reference Signal) technology. However, different from SRS, this method can achieve autonomous link management through terminal-side hardware redundancy and fast switching, which is beneficial to ensuring the continuity of critical services in scenarios without base station intervention, while supporting multi-mode cooperation and fault self-healing functions, significantly improving the scenario adaptability and functional safety of the vehicle-mounted communication system.

[0035] Optionally, in some embodiments, the communication module 130 is further configured to: poll the signal strength parameter of the target polling antenna, where the target polling antenna is a vehicle-mounted antenna 110 whose signal strength parameter has been confirmed not to meet the preset communication quality condition; when the signal strength parameter of the target polling antenna meets the preset communication quality condition again, allow the first communication end 121 to connect to the second communication end 123 corresponding to the target polling antenna again; after polling the target polling antenna a preset number of times, if the signal strength parameter of the target polling antenna still does not meet the preset communication quality condition, generate abnormal state information corresponding to the vehicle-mounted antenna 110.

[0036] In this alternative embodiment, a polling mechanism is provided for performing a status backtest on the vehicle-mounted antenna 110 whose signal strength parameter does not meet the preset communication quality condition. When the communication module 130 determines that the signal strength parameter of a certain vehicle-mounted antenna 110 does not meet the preset communication quality condition, it will mark it as the target polling antenna and start the polling mechanism to periodically backtest the signal strength parameter of the target polling antenna. If, during subsequent polling, the signal strength parameter of the target polling antenna meets the preset communication quality condition again, the communication module 130 will control the RF switch 120 to allow the first communication end 121 to be connected to the second communication end 123 corresponding to the target polling antenna again. Subsequently, the vehicle-mounted antenna 110 can be actively or passively switched to the antenna with restored communication quality for communication again. For example, the comprehensive performance of the current antenna and the antenna with restored communication quality can be compared, and the antenna with better signal quality can be switched for communication. Or when the communication quality of the current antenna is good, the current link can be maintained all the time to avoid the instability risk brought by frequent switching. Also, different antennas can be set with priorities. For example, the main antenna 111 is usually set to have the highest priority. If the antenna with a higher priority restores communication quality, it will be preferentially switched to for communication.

[0037] In this alternative embodiment, if after polling the target polling antenna a preset number of times, the signal strength parameter of the target polling antenna still fails to meet the preset communication quality condition, it indicates that there is a hardware fault in this antenna or it is in a long-term irreversible signal degradation environment. At this time, the communication module 130 will generate and report an abnormal status information. Among them, the preset number of times can be specifically set dynamically according to the communication scenario to balance the accuracy of fault confirmation and response timeliness. And the abnormal status information is structured alarm data indicating information such as the fault type, location identifier, and historical data. Specifically, it can include information such as the faulty antenna number, fault type code, polling log, degradation timeline, and the value of the last valid signal parameter, etc. The abnormal status information can be transmitted to the vehicle head unit device, mobile terminal, or remote service center, etc. through specific communication protocols such as Controller Area Network bus protocol, Ethernet protocol, Universal Asynchronous Receiver-Transmitter protocol, Universal Serial Bus protocol, etc., so that the driver or vehicle maintenance personnel can obtain the status information of the vehicle-mounted antenna 110 in time, which is conducive to quickly locating the fault point and performing corresponding fault troubleshooting or repair processing, and can also provide data support for the antenna layout optimization strategy during the vehicle R & D process.

[0038] Optionally, in some embodiments, the communication module 130 is further configured to connect to the terminal main control and report the generated abnormal status information to the terminal main control for the terminal main control to generate an abnormal warning based on the abnormal status information.

[0039] In this alternative embodiment, the terminal main controller refers to the core control unit in the vehicle communication system, such as the MCU (Microcontroller Unit, a control unit), SOC (System on Chip), or ECU (Electronic Control Unit) in devices such as the vehicle center console, in-vehicle computer, or domain controller. It is usually integrated with a high-performance processor and rich peripheral interfaces, and is used to receive the abnormal status information reported by the communication module 130 and process and respond to it. By connecting the communication module 130 to the terminal main controller, deep coordination between the communication status and the vehicle function system is achieved. The terminal main controller can receive the abnormal status information sent by the communication module 130, and based on information such as the fault type code and the faulty antenna number in the abnormal status information, quickly identify and locate the fault point of the vehicle antenna 110 system through built-in diagnostic algorithms or preset fault identification rules, etc., to obtain an abnormal warning. This abnormal warning can specifically be a pop-up window on the visual user interface, a voice broadcast prompt, or a notification message remotely pushed to the owner's mobile terminal application, etc., and can be transmitted to the user or maintenance personnel through the in-vehicle display screen, speaker system, or cellular network communication link, realizing multi-channel alarm coverage. This can ensure that users can promptly perceive the fault and take corresponding measures, which is beneficial to shortening the fault response time, reducing the driving risks caused by communication interruptions, and providing an accurate fault location basis for after-sales maintenance, guaranteeing the safe operation of the vehicle. In addition, after receiving the abnormal warning, the terminal main controller can further automatically or prompt the driver to take corresponding emergency measures according to preset emergency handling strategies, such as starting a backup communication link, reducing the vehicle speed, or parking to avoid danger, etc., so as to maximize the guarantee of driving safety and the safety of passengers' lives.

[0040] Optionally, in some embodiments, the vehicle communication device 100 is further configured to connect to a display and map the signal strength parameter of the vehicle antenna 110 onto the display.

[0041] In this alternative embodiment, the display can specifically be a visual device such as an in-vehicle center control screen, a digital instrument panel, or a head-up display system in a vehicle. It can be connected to the communication module 130 through an in-vehicle bus or a wireless screen mirroring protocol, etc., and can receive and render the information of the signal strength parameters of the vehicle-mounted antenna 110 in real time. It is dynamically visualized through real-time curve graphs, heat maps, or status icons and text prompts, etc. By mapping the signal strength parameters of the vehicle-mounted antenna 110 onto the display, the driver or vehicle maintenance personnel can intuitively understand the real-time communication status of the vehicle-mounted antenna 110. For example, on the in-vehicle center control screen, the change trend of the signal strength parameters of each vehicle-mounted antenna 110 can be displayed through a dynamic curve graph, and the quality of the signal can be represented by different colors or brightness. At the same time, with the cooperation of text prompts or icon markings, it helps users quickly identify the status of the current communication link and whether there are potential fault risks. This visual presentation method not only improves the readability of information but also helps users make timely and accurate responses, thereby further enhancing the reliability and user experience of the vehicle-mounted communication device 100.

[0042] Optionally, in some embodiments, the signal strength parameters include at least one of reference signal reception quality, reference signal reception power, and signal-to-noise ratio; the communication module 130 is further configured to: when the reference signal reception quality is lower than a preset reception quality threshold, and / or the reference signal reception power is lower than a preset reception power threshold, and / or the signal-to-noise ratio is lower than a preset signal-to-noise ratio threshold, determine that the signal strength parameters do not meet the preset communication quality conditions.

[0043] In this alternative embodiment, the types of signal strength parameters are specified, as well as the specific method for determining whether the signal strength parameters meet the preset communication quality conditions. Among them, the reference signal received quality refers to the ratio of the signal quality to the interference noise, reflecting the anti-interference ability of the signal in a complex environment; the reference signal received power refers to the average power of the reference signal measured at the receiving end, reflecting the basic strength of the signal, that is, the strength of the signal; and the signal-to-noise ratio refers to the ratio of the effective signal power to the background noise power, reflecting the clarity of signal transmission. When any one of these parameters is lower than the preset threshold, the communication module 130 will determine that the communication quality of the current communication connection does not meet the standard, that is, does not meet the preset communication quality conditions, and trigger corresponding antenna switching or warning actions. The preset thresholds include a preset received quality threshold, a preset received power threshold, and a preset signal-to-noise ratio threshold. These preset thresholds are statically preset or dynamically configurable values, which can be set according to the characteristics of the communication system, the requirements of scenarios such as normal driving and emergency calls, and the driving or stationary state of the vehicle. For example, the preset received power threshold in a 5G communication scenario is -115 dBm, while it is increased to -100 dBm in an emergency call scenario to enhance reliability. Through this method of judging whether the preset communication quality conditions are met, it is possible to flexibly adapt to the communication requirements of different scenarios, taking into account the accuracy and real-time nature of the judgment, avoiding false switching caused by short-term signal fluctuations, and quickly responding in case of real faults or long-term degradation, ensuring the stability and safety of the communication link.

[0044] Optionally, in some embodiments, the switching time of the RF switch 120 is less than 10 ms, and the isolation of the RF switch 120 is greater than 25 dB.

[0045] In this alternative embodiment, requirements are imposed on the performance indicators of the RF switch 120. Among them, the switch switching time is the time required for the RF switch 120 to switch from the current conducting channel to the target channel, reflecting the response speed and real-time performance of the system to changes in the communication link; while the isolation degree refers to the signal isolation ability between different channels of the RF switch 120 in the off state, reflecting the suppression level of signal crosstalk between multiple antennas. In this embodiment, it is required that the switching time of the RF switch 120 is less than 10 ms. Because in the vehicle-mounted communication scenario, such as high-speed driving or emergency calls, if the switching time is too long, such as exceeding 50 ms, it may cause data transmission interruption or critical service delay, and the switching within 10 ms can ensure seamless transition of the communication link. The requirement for the isolation degree to be greater than 25 dB is considered in the typical scenario of dense deployment of vehicle-mounted antennas 110. When the isolation degree reaches more than 25 dB, it can effectively suppress signal leakage between adjacent antennas, and when it is too low, it may cause signal crosstalk and lead to a decline in communication quality. In order to make the RF switch 120 meet these performance indicators, a dedicated RF switch that meets these performance indicators is usually selected as the RF switch 120. The specific type of the RF switch 120 can be SP2T (single-pole double-throw), 3P3T (three-pole three-throw), DP4T (double-pole four-throw) or other single-pole or multi-pole multi-throw switches, etc., which can be specifically set according to the number of antennas. By selecting an RF switch 120 that meets high speed, high isolation and low insertion loss, this application can achieve millisecond-level communication link switching and avoid signal crosstalk in complex electromagnetic environments or multi-mode concurrent scenarios, which is beneficial to ensuring the real-time performance and reliability of high-priority services, and at the same time reducing the risk of performance degradation of the vehicle-mounted communication system caused by signal interference.

[0046] Refer to Figure 2 , Figure 2 FIG. is a schematic structural diagram of an embodiment of a vehicle-mounted communication system provided by this application. The vehicle-mounted communication system 200 includes: as Figure 1 described vehicle-mounted communication device 100; a terminal main control 210, connected to the communication module 130 of the vehicle-mounted communication device 100, for receiving the information reported by the communication module 130 and processing the information reported by the communication module 130; a display 220, connected to the communication module 130 of the vehicle-mounted communication device 100, for mapping and displaying the signal strength parameters of the vehicle-mounted antennas 110 in the vehicle-mounted communication device 100.

[0047] In this embodiment, the vehicle-mounted communication system 200 refers to a platform for multi-mode communication management and interaction integrated in a vehicle, which may specifically be a vehicle-mounted telematics system, an intelligent connected vehicle communication control system, an autonomous driving communication integration system, or a specific intelligent driving car machine system, etc. The vehicle-mounted communication system 200 may specifically be an embedded communication module deployed in vehicle-mounted devices such as vehicle-mounted telematics processors, vehicle-mounted gateways, or domain controllers. By interconnecting the corresponding vehicle-mounted devices through hardware interfaces and communication protocols, dynamic management and collaborative optimization of multi-mode signals such as cellular communication, V2X, and satellite communication can be realized on the vehicle.

[0048] In this embodiment, the vehicle-mounted communication system 200 integrates the vehicle-mounted communication device 100 as described above. Through the dynamic switching of the radio frequency switch 120 and the intelligent scheduling of the communication module 130, multi-antenna collaboration and fault tolerance are achieved. The vehicle-mounted communication system 200 also integrates a terminal main control 210 and a display 220. By the terminal main control 210 parsing the abnormal state information reported by the communication module 130 in real time, an alarm mechanism can be accurately and effectively triggered, and the vehicle functions can be dynamically adjusted. Through the display 220, the signal strength parameters and fault states of each antenna can be presented in a visual form, intuitively reflecting the health state of the communication system and assisting users or maintenance personnel in making quick decisions. The settings of the terminal main control 210 and the display 220 can refer to the corresponding introductions above and will not be elaborated here. The vehicle-mounted communication system 200 realizes a closed-loop interaction link of signal detection, fault determination, switching execution, and status feedback through the integration of the vehicle-mounted communication device 100, the terminal main control 210, and the display 220. Through this system, seamless switching of the communication link can be realized in complex driving scenarios, significantly reducing the risk of communication interruption, which is beneficial to improving the reliability of autonomous driving functions, optimizing the user interaction experience, and providing accurate fault diagnosis data support for after-sales maintenance.

[0049] Since some embodiments of this system correspond to the embodiments of the vehicle-mounted communication device 100 above, the introduction of the vehicle-mounted communication system 200 provided in the embodiments of the present invention can refer to the embodiments of the vehicle-mounted communication device 100 above. The embodiments of the present invention will not be elaborated here, and it has the same beneficial effects as the vehicle-mounted communication device 100 above.

[0050] Refer to Figure 3 , Figure 3 which is a schematic flowchart of an embodiment of the vehicle-mounted antenna switching method provided in this application. The vehicle-mounted antenna switching method is applied to the communication module 130 in the vehicle-mounted communication device 100 as described in any one of claims 1-6. The method includes:

[0051] Step 310: Control the radio frequency switch 120 to connect to the main antenna 111.

[0052] Step 320: Monitor the signal strength parameter of the main antenna 111.

[0053] Step 330: When the signal strength parameter of the main antenna 111 does not meet the preset communication quality condition, control the RF switch 120 to connect to the secondary antenna 112.

[0054] Step 340: Based on the signal strength parameter of the secondary antenna 112, control the vehicle-mounted antenna 110 connected to the RF switch 120.

[0055] In this embodiment, a vehicle-mounted antenna switching method based on the intelligent decision-making and dynamic control capabilities of the communication module 130 in the vehicle-mounted communication device 100 is provided. This method realizes the switching of the vehicle-mounted antenna 110 based on the structure of the corresponding vehicle-mounted communication device 100. Specifically, this vehicle-mounted antenna switching method will first initialize the main antenna 111 link through the communication module 130 and monitor its signal quality in real time, and then trigger the RF switch 120 to switch to the secondary antenna 112 and start the polling detection mechanism when the signal deteriorates. In this way, seamless switching and fault self-healing of the communication link can be achieved, thereby ensuring the continuity and reliability of vehicle-mounted communication, which is beneficial to maintaining the functional integrity of high-priority services such as autonomous driving and emergency calls in complex driving scenarios.

[0056] Optionally, in some embodiments, after controlling the RF switch 120 to connect to the secondary antenna 112 when the signal strength parameter of the main antenna 111 does not meet the preset communication quality condition, it further includes: polling the signal strength parameter of the main antenna 111; if the signal strength parameter of the main antenna 111 meets the preset communication quality condition again, control the RF switch 120 to connect to the main antenna 111; after polling the main antenna 111 a preset number of times, if the signal strength parameter of the main antenna 111 still does not meet the preset communication quality condition, generate abnormal status information corresponding to the main antenna 111.

[0057] This optional embodiment provides a polling mechanism. Taking the status recovery detection of the main antenna 111 as an example, by periodically reactivating the main antenna 111 and detecting its signal parameters, it can automatically switch back to the main link after the main antenna 111 fails to recover to optimize the communication performance. It can be understood that this method provides an embodiment for the main antenna 111, and the secondary antenna 112 is also applicable to a similar polling detection logic. By periodically detecting the signal quality of the secondary antenna 112, dynamic maintenance and redundancy guarantee of the secondary antenna 112 can be achieved, and it can quickly switch to other standby antennas when the secondary antenna 112 fails. Through the setting of this polling mechanism, a multi-layer self-healing communication link management logic can be constructed, which is beneficial to improving the adaptive ability and long-term reliability of the vehicle-mounted communication system 200, and at the same time reducing the risk of communication interruption caused by single-point failures.

[0058] Optionally, in some embodiments, after the radio frequency switch 120 is controlled to connect to the secondary antenna 112 when the signal strength parameter of the main antenna 111 does not meet the preset communication quality condition, the method further includes: reporting the generated abnormal status information to the terminal main control for the terminal main control to generate an abnormal warning based on the abnormal status information.

[0059] Optionally, in some embodiments, after monitoring the signal strength parameter of the main antenna 111, the method further includes: mapping the signal strength parameter of the vehicle-mounted antenna 110 to the display 220.

[0060] Optionally, in some embodiments, the signal strength parameter includes at least one of reference signal receiving quality, reference signal receiving power, and signal-to-noise ratio; before controlling the radio frequency switch 120 to connect to the secondary antenna 112 when the signal strength parameter of the main antenna 111 does not meet the preset communication quality condition, the method further includes: determining that the signal strength parameter does not meet the preset communication quality condition when the reference signal receiving quality is lower than the preset receiving quality threshold, and / or the reference signal receiving power is lower than the preset receiving power threshold, and / or the signal-to-noise ratio is lower than the preset signal-to-noise ratio threshold.

[0061] Optionally, in some embodiments, the switching time of the radio frequency switch 120 in the vehicle-mounted communication device 100 is less than 10 ms, and the isolation degree of the radio frequency switch 120 is greater than 25 dB.

[0062] Since some embodiments of this method part correspond to the embodiments of the above vehicle-mounted communication device 100, for the introduction of the vehicle-mounted antenna switching method provided by the embodiments of the present invention, please refer to the embodiments of the above vehicle-mounted communication device 100. The embodiments of the present invention will not be described in detail herein, and it has the same beneficial effects as the above vehicle-mounted communication device 100.

[0063] Refer to Figure 4 , Figure 4 is a schematic structural diagram of an embodiment of the storage medium provided by the present application.

[0064] The storage medium 400 stores program data 410, and when the program data 410 is executed by a processor, it implements the vehicle-mounted communication device 100 as Figure 1 described.

[0065] The program data 410 is stored in a storage medium 400 and includes several instructions for causing a network device (which can be a router, a personal computer, a server, etc.) or a processor to execute all or part of the steps of the methods described in the various embodiments of the present application.

[0066] Optionally, the storage medium 400 can be various media such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disc that can store the program data 410.

[0067] Differing from the prior art, the present application discloses a vehicle-mounted communication device, a system, a vehicle-mounted antenna switching method, and a storage medium. By setting multiple vehicle-mounted antennas and using a radio frequency switch and a communication module to achieve intelligent switching between vehicle-mounted antennas, when the signal strength parameter of one vehicle-mounted antenna does not meet the preset communication quality condition, the communication module can automatically switch to other vehicle-mounted antennas for communication. This intelligent switching and exception handling mechanism can ensure that the vehicle-mounted device maintains a stable communication connection in various communication scenarios, effectively improving the reliability and safety of the vehicle-mounted communication device, reducing the risk of communication interruption caused by antenna failures, and providing strong guarantees for driving safety and the safety of passengers' lives.

[0068] Each embodiment in this specification is described in a progressive manner. The same or similar parts between each embodiment can be referred to each other, and the key point of each embodiment is to illustrate the differences from other embodiments. In particular, for the embodiments of the vehicle-mounted communication system, the vehicle-mounted antenna switching method, and the storage medium, since they are basically similar to the embodiment of the vehicle-mounted communication device, the description is relatively simple, and the relevant parts can be referred to the partial description of the embodiment of the vehicle-mounted communication device.

[0069] In several implementation manners provided by the present application, it should be understood that the disclosed device, system, method, and storage medium can be implemented in other ways. For example, the device implementation manner described above is only illustrative. For example, the division of the module or unit is only a logical function division, and there can be other division manners in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0070] The unit described as a separated component may or may not be physically separated, and the component shown as a unit may or may not be a physical unit, that is, it may be located in one place, or may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this implementation manner.

[0071] In addition, each functional unit in each implementation manner of the present application can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0072] The above are only embodiments of the present application, and thus do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present application.

Claims

1. A vehicle-mounted communication device, characterized in that, Comprising: A plurality of vehicle-mounted antennas, including a main antenna and at least one sub-antenna; A radio frequency switch, including a first communication terminal, a channel control terminal, and a plurality of second communication terminals. Each of the vehicle-mounted antennas is connected to a different one of the second communication terminals. The radio frequency switch internally connects the first communication terminal to the second communication terminal corresponding to the main antenna by default, and switches the second communication terminal internally connected to the first communication terminal based on a switching instruction received by the channel control terminal; A communication module, connected to the first communication terminal and the channel control terminal of the radio frequency switch circuit, for sending an enabling signal to the first communication terminal to drive the corresponding vehicle-mounted antenna to work, obtaining the signal strength parameter of the corresponding vehicle-mounted antenna from the first communication terminal, and sending the switching instruction to the channel control terminal when the signal strength parameter does not meet the preset communication quality condition.

2. The in-vehicle communication device according to claim 1, wherein The communication module is further configured to: Poll the signal strength parameter of the target polling antenna, where the target polling antenna is a vehicle-mounted antenna for which it has been confirmed that the signal strength parameter does not meet the preset communication quality condition; When the signal strength parameter of the target polling antenna meets the preset communication quality condition again, allow the first communication terminal to be connected to the second communication terminal corresponding to the target polling antenna again; After polling the target polling antenna a preset number of times, if the signal strength parameter of the target polling antenna still does not meet the preset communication quality condition, generate abnormal status information corresponding to the vehicle-mounted antenna.

3. The in-vehicle communication device according to claim 2, wherein The communication module is further configured to connect to a terminal main control and report the generated abnormal status information to the terminal main control for the terminal main control to generate an abnormal warning based on the abnormal status information.

4. The in-vehicle communication device according to claim 1, wherein The vehicle-mounted communication device is further configured to connect to a display and map the signal strength parameter of the vehicle-mounted antenna to the display.

5. The in-vehicle communication device according to claim 1, characterized in that, The signal strength parameter includes at least one of reference signal reception quality, reference signal reception power, and signal-to-noise ratio; The communication module is further configured to: Determine that the signal strength parameter does not meet the preset communication quality condition when the reference signal reception quality is lower than a preset reception quality threshold, and / or the reference signal reception power is lower than a preset reception power threshold, and / or the signal-to-noise ratio is lower than a preset signal-to-noise ratio threshold.

6. The vehicle-mounted communication device according to claim 1, characterized in that, The switching time of the radio frequency switch is less than 10 ms, and the isolation degree of the radio frequency switch is greater than 25 dB.

7. A vehicle-mounted communication system, characterized in that, The vehicle-mounted communication system includes: The vehicle-mounted communication device according to any one of claims 1-6; A terminal main control, connected to the communication module of the vehicle-mounted communication device, for receiving the information reported by the communication module and processing the information reported by the communication module; A display, connected to the communication module of the vehicle-mounted communication device, for mapping and displaying the signal strength parameter of the vehicle-mounted antenna in the vehicle-mounted communication device.

8. A vehicle-mounted antenna switching method, applied to a communication module in the vehicle-mounted communication device according to any one of claims 1-6, characterized in that, Comprising: Control the radio frequency switch to connect to the main antenna; Monitor the signal strength parameter of the main antenna; When the signal strength parameter of the main antenna does not meet the preset communication quality condition, control the radio frequency switch to connect to the sub-antenna; Based on the signal strength parameter of the secondary antenna, control the vehicle-mounted antenna connected to the RF switch.

9. The vehicle-mounted antenna switching method according to claim 8, characterized in that, When the signal strength parameter of the main antenna does not meet the preset communication quality condition, after controlling the RF switch to connect to the secondary antenna, it further includes: Poll the signal strength parameter of the main antenna; If the signal strength parameter of the main antenna meets the preset communication quality condition again, control the RF switch to connect to the main antenna; After polling the main antenna a preset number of times, if the signal strength parameter of the main antenna still does not meet the preset communication quality condition, generate abnormal state information corresponding to the main antenna.

10. A storage medium having program data stored thereon, characterized in that, When the program data is executed by a processor, it implements the steps of the vehicle-mounted antenna switching method as described in claim 8 or 9.

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