Vehicle-mounted communication terminal and vehicle

Abstract

The utility model provides a vehicle-mounted communication terminal and a vehicle, which are applied to the field of communication. The vehicle-mounted communication terminal comprises a mother board provided with a power supply system; the first layer of daughter board is arranged on the mother board; the first layer of daughter board is provided with a plurality of functional subsystems; the second layer of daughter board is arranged on the first layer of daughter board; the second layer of daughter board is provided with a plurality of debugging subsystems; the mother board and the first layer daughter board are connected through a pluggable standard signal connector, and the first layer daughter board and the second layer daughter board are connected through a pluggable standard signal connector. According to the utility model, functional module packaging is carried out on the vehicle-mounted communication terminal, the vehicle-mounted communication terminal is divided into the mother board, the first-layer daughter board and the second-layer daughter board, and the mother board and the daughter boards as well as the daughter boards are connected through the pluggable standard signal connectors, so that the vehicle-mounted communication terminal is convenient to disassemble and assemble, part of modules are convenient to replace, and the cost is reduced. The whole vehicle-mounted communication terminal does not need to be replaced, time can be saved, and cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of communication technologies, and in particular to a vehicle-mounted communication terminal and a vehicle. Background Art

[0002] With the development and iterative update of communication technologies, various communication modules may need to be replaced during use. However, in existing vehicle-mounted communication terminals, each communication module is directly fixedly installed on a PCB (Printed Circuit Board). After production, it cannot be modified. If one of the modules or chips needs to be replaced, the entire vehicle-mounted communication terminal needs to be replaced, or the PCB board needs to be re-laid out, the wiring needs to be modified, the interface protocol needs to be adjusted, and the board needs to be re-made and verified by chip mounting, etc., which takes a long time and incurs high costs. Content of the Utility Model

[0003] Embodiments of the utility model provide a vehicle-mounted communication terminal and a vehicle to solve the problem that it takes a long time and incurs high costs when a module or chip in an existing vehicle-mounted communication terminal needs to be replaced.

[0004] In a first aspect, embodiments of the utility model provide a vehicle-mounted communication terminal, including:

[0005] A motherboard provided with a power system;

[0006] A first-layer daughter board arranged on the motherboard; the first-layer daughter board is provided with a plurality of functional subsystems; and,

[0007] A second-layer daughter board arranged on the first-layer daughter board; the second-layer daughter board is provided with a plurality of debugging subsystems;

[0008] The motherboard and the first-layer daughter board, and the first-layer daughter board and the second-layer daughter board are both connected through pluggable standard signal connectors.

[0009] In a possible implementation manner, the first-layer daughter board includes a first daughter board provided with a control subsystem, a second daughter board provided with a cellular communication subsystem, a third daughter board provided with an audio subsystem, a fourth daughter board provided with a satellite communication subsystem, a fifth daughter board provided with a positioning subsystem, and a sixth daughter board provided with a digital key subsystem;

[0010] The first daughter board, the second daughter board, the third daughter board, the fourth daughter board, the fifth daughter board, and the sixth daughter board are all connected to the motherboard through their respective corresponding standard signal connectors.

[0011] In a possible implementation manner, the second-layer daughter board is arranged on the second daughter board.

[0012] In a possible implementation, the second-layer daughter board includes a first debug daughter board provided with an application processor and a second debug daughter board provided with an Ethernet communication subsystem;

[0013] Both the first debug daughter board and the second debug daughter board are connected to the first-layer daughter board through their respective corresponding standard signal connectors.

[0014] In a possible implementation, a main connector for connecting to an external device is further provided on the motherboard.

[0015] In a possible implementation, the control subsystem includes a micro control unit and a first crystal oscillator, a monitoring chip, a real-time clock chip, a first controller area network bus transceiver, and a second controller area network bus transceiver connected to the micro control unit.

[0016] In a possible implementation, the cellular communication subsystem includes a cellular communication module and an independent cellular vehicle-to-everything communication module, a first inertial measurement unit, a memory, a hardware security module, a WIFI and Bluetooth module, a first electronic subscriber identification card, a cellular communication antenna, and a first Ethernet physical layer chip connected to the cellular communication module.

[0017] In a possible implementation, the positioning subsystem includes a positioning module and a second inertial measurement unit.

[0018] In a possible implementation, the digital key subsystem includes an ultra-wideband chip, a Bluetooth chip, and a security encryption chip connected to the Bluetooth chip.

[0019] In a possible implementation, the audio subsystem includes an audio codec and an audio amplifier.

[0020] In a second aspect, an embodiment of the present invention provides a vehicle, including an in-vehicle communication terminal according to the first aspect or any one of the possible implementations of the first aspect.

[0021] An embodiment of the present invention provides an in-vehicle communication terminal and a vehicle. The in-vehicle communication terminal includes a motherboard provided with a power supply system; a first-layer daughter board provided on the motherboard; the first-layer daughter board is provided with a plurality of functional subsystems; and a second-layer daughter board provided on the first-layer daughter board; the second-layer daughter board is provided with a plurality of debug subsystems; between the motherboard and the first-layer daughter board, and between the first-layer daughter board and the second-layer daughter board are all connected through pluggable standard signal connectors. By functionally modularizing the in-vehicle communication terminal in the embodiments of the present application, it is divided into a motherboard, a first-layer daughter board, and a second-layer daughter board, and the motherboard and the daughter board and between the daughter boards are all connected through pluggable standard signal connectors, which is convenient for disassembly and installation, and convenient for replacing some modules without replacing the entire in-vehicle communication terminal, which can save time and reduce costs. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic structural diagram of a vehicle-mounted communication terminal provided by an embodiment of the present utility model;

[0024] Figure 2 It is a schematic diagram of the connection relationship of a vehicle-mounted communication terminal provided by an embodiment of the present utility model. Specific embodiments

[0025] The following further clarifies the present application with specific embodiments. The following embodiments will help those skilled in the art further understand the function of the present application, but do not limit the present application in any form. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made. These all belong to the protection scope of the present application.

[0026] It should be understood that when used in the description of the specification and the appended claims of the present application, the term "comprising" indicates the presence of the described features, wholes, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0027] It should also be understood that the term "and / or" used in the description of the specification and the appended claims of the present application refers to any combination and all possible combinations of one or more of the related listed items, and includes these combinations.

[0028] In the description of the specification and the appended claims of the present application, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0029] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that specific features, structures, or characteristics described in connection with that embodiment are included in one or more embodiments of this application. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments", etc. that appear in different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0030] In addition, the "plurality" mentioned in the embodiments of this application should be construed as two or more.

[0031] The implementation of the present utility model will be described in detail below in conjunction with specific drawings:

[0032] With the development and iterative update of communication technologies, after each communication module is updated, it may need to be replaced. With the development of intelligence, when the intelligent demand increases, it may be necessary to add chips or communication modules.

[0033] However, in existing vehicle-mounted communication terminals, each communication module is directly fixedly installed on the PCB board and cannot be modified after production. Exemplarily, existing vehicle-mounted communication terminals may have a 5G (5th Generation Mobile Communication Technology) communication module, a V2X (vehicle to X) communication module, a WIFI communication module, a satellite communication module, etc. fixedly installed on the PCB board. The PCB board and each communication module are taken as a whole, and it is difficult to modify or replace a certain communication module among them.

[0034] For existing vehicle-mounted communication terminals, if you want to replace one of the modules or chips, you need to replace the entire vehicle-mounted communication terminal, or you need to re-layout the PCB board, modify the wiring, adjust the interface protocol, re-board and patch for verification, etc., which takes a long time and has a high cost.

[0035] To solve the above problems, the embodiments of this application provide a vehicle-mounted communication terminal. Figure 1 The following is a schematic structural diagram of a vehicle-mounted communication terminal provided by an embodiment of the present utility model. Refer to Figure 1 , the vehicle-mounted communication terminal may include:

[0036] A motherboard 10 provided with a power system 11;

[0037] The first - layer daughter board disposed on the motherboard 10; the first - layer daughter board is provided with a plurality of functional subsystems; and,

[0038] The second - layer daughter board disposed on the first - layer daughter board; the second - layer daughter board is provided with a plurality of debugging subsystems;

[0039] Between the motherboard 10 and the first - layer daughter board, and between the first - layer daughter board and the second - layer daughter board, they are all connected through a plug - and - play standard signal connector 20.

[0040] Among them, the motherboard 10, the first - layer daughter board, and the second - layer daughter board can all be PCB boards. In Figure 1 , the PCB board filled with left - slashes is the motherboard 10, the blank - filled PCB board is the first - layer daughter board, and the square - filled PCB board is the second - layer daughter board. Between the motherboard 10 and the first - layer daughter board, and between the first - layer daughter board and the second - layer daughter board, they are all connected through a plug - and - play standard signal connector 20 and PCB traces. The connections between various devices on the motherboard 10, the connections between various functional subsystems and various devices on the first - layer daughter board, and the connections between various debugging subsystems and various devices on the second - layer daughter board can all be realized through PCB traces.

[0041] The standard signal connector 20 is a standardized Board To Board (B2B) connector. When connecting the motherboard 10 and the first - layer daughter board through the standard signal connector 20, the first connection terminal of the standard signal connector 20 can be provided on the motherboard 10, and the second connection terminal of the standard signal connector 20 can be provided on the first - layer daughter board. The first connection terminal and the second connection terminal are connected in one - to - one correspondence to achieve plug - and - play connection. When connecting the first - layer daughter board and the second - layer daughter board through the standard signal connector 20, similarly, it will not be elaborated.

[0042] In the embodiments of the present application, through requirements analysis, the pin requirements of both connected parties (including power supply, control, communication interfaces, etc.), as well as the reserved pin requirements for compatibility and scalability design, are designed according to the PCB layout specifications and B2B connector specifications requirements to form standardized PIN foot and PIN sequence definitions, thereby realizing the standard signal connector 20. When a certain daughter board needs to be replaced later, only the signals of the connection pins of the daughter board need to be corresponding to the signals of the pins of the corresponding standard signal connector, and then rapid replacement can be achieved.

[0043] The standard signal connector 20, as the main connection point between the motherboard 10 and the daughter board, undertakes a large number of signal and data transmission tasks.

[0044] The motherboard 10 is the main power supply system of the vehicle-mounted communication terminal, responsible for functions such as power supply and protection of each subsystem. Therefore, a power supply system 11 is provided on the motherboard 10. The power supply system 11 can serve as the energy source of the vehicle-mounted communication terminal, providing stable electric energy for all daughter boards. The power supply system 11 can include components such as a buck / boost DC-DC module, an LDO (Low-dropout regulator), a CAN-FD (CAN with Flexible Data Rate) chip, a backup battery, and interface protection. The motherboard 10 can be interconnected with each subsystem through a standard signal connector 20 with 80 pins or 40 pins.

[0045] Integrating the power supply system 11 on the motherboard 10 can conveniently distribute power to each daughter board, ensuring that all subsystems can obtain stable and reliable power. The power supply system 11 will generate certain electromagnetic radiation during operation. Integrating the power supply system 11 on the motherboard 10 can reduce electromagnetic interference through reasonable layout and shielding measures compared with setting a power supply on each daughter board. In addition, by setting the power supply system 11 on the motherboard 10, the first-layer daughter board and the second-layer daughter board can share a power supply system, instead of setting a power supply system for each daughter board, which can save power chips and reduce space occupation.

[0046] The functional subsystems are the subsystems corresponding to different functions divided by the vehicle-mounted communication terminal. By dividing it into multiple subsystems, each subsystem can be independently designed, developed, and tested, reducing the complexity of the entire system, improving the maintainability and scalability of the entire system, facilitating subsequent function upgrades and module replacements, and reducing the coupling degree between systems.

[0047] The debugging subsystem is the subsystem of the vehicle-mounted communication terminal used for relevant design verification and function debugging. Setting it on the second-layer daughter board can facilitate debugging and testing without affecting the normal operation of other subsystems.

[0048] The vehicle-mounted communication terminal provided by the embodiment of this application is the vehicle-mounted T-BOX.

[0049] The in-vehicle communication terminal provided by the embodiment of the present application includes a motherboard 10 provided with a power system 11; a first-layer daughter board arranged on the motherboard 10; the first-layer daughter board is provided with a plurality of functional subsystems; and a second-layer daughter board arranged on the first-layer daughter board; the second-layer daughter board is provided with a plurality of debugging subsystems; the motherboard 10 is connected to the first-layer daughter board, and between the first-layer daughter board and the second-layer daughter board through a pluggable standard signal connector 20. By functionally modularizing the in-vehicle communication terminal in the embodiment of the present application, it is divided into a motherboard 10, a first-layer daughter board and a second-layer daughter board, and the motherboard 10 is connected to the daughter board and between the daughter boards through a pluggable standard signal connector 20, which is convenient for disassembly and installation, and is convenient for replacing some modules without replacing the entire in-vehicle communication terminal, which can save time and reduce costs.

[0050] The overall structure of the in-vehicle communication terminal is introduced above, which includes a first-layer daughter board provided with a plurality of functional subsystems. The structure of the first-layer daughter board will be continued to be introduced below.

[0051] In some embodiments, referring to Figure 1 , the first-layer daughter board includes a first daughter board 21 provided with a control subsystem, a second daughter board 22 provided with a cellular communication subsystem, a third daughter board 23 provided with an audio subsystem, a fourth daughter board 24 provided with a satellite communication subsystem, a fifth daughter board 25 provided with a positioning subsystem, and a sixth daughter board 26 provided with a digital key subsystem;

[0052] The first daughter board 21, the second daughter board 22, the third daughter board 23, the fourth daughter board 24, the fifth daughter board 25 and the sixth daughter board 26 are all connected to the motherboard 10 through their respective corresponding standard signal connectors 20.

[0053] In this embodiment, between the motherboard 10 and each daughter board, and between each daughter board, signal and / or energy transmission can be achieved through the corresponding standard signal connector 20 and PCB traces, etc.

[0054] The control subsystem is the main control system of the in-vehicle communication terminal, and can be used for functions such as interrupt detection / wake-up, PWM (Pulse Width Modulation) detection, timing, power management, enable control, SPI (Serial Peripheral Interface) / UART (Universal Asynchronous Receiver Transmitter) communication, etc.

[0055] The first daughter board 21 equipped with a control subsystem can be connected to the motherboard 10 through a 2×80Pin standard signal connector 20. Power supply, I / O, communication and other interfaces are all transmitted through this standard signal connector 20.

[0056] The cellular communication subsystem is the main communication system of the vehicle-mounted communication terminal and can be used for functions related to TSP (Telematics Service Provider, remote service provider) connection (remote control, authentication, diagnosis, etc.), B / E-CALL (Breakdown / Emergency Call), V2X (vehicle to X), positioning, time calibration, WIFI / BT (BlueTooth) connection, Ethernet communication and other functions.

[0057] The second daughter board 22 equipped with a cellular communication subsystem can be connected to the motherboard 10 through a 2 / 3×40Pin standard signal connector 20. Power supply, I / O, communication and other interfaces are all transmitted through this standard signal connector 20.

[0058] The audio subsystem can be used for analog / digital audio conversion, transmission, and amplification functions.

[0059] The third daughter board 23 equipped with an audio subsystem can be connected to the motherboard 10 through a 1×40Pin standard signal connector 20. Power supply, I / O, communication and other interfaces are all transmitted through this standard signal connector 20.

[0060] The satellite communication subsystem can be used for functions related to Tiantong satellite communication (satellite phone, short message, etc.).

[0061] The fourth daughter board 24 equipped with a satellite communication subsystem can be connected to the motherboard 10 through a 2×40Pin standard signal connector 20. Power supply, I / O, communication and other interfaces are all transmitted through this standard signal connector 20.

[0062] The positioning subsystem is a high-precision positioning subsystem and can adopt multi-mode satellite positioning technologies such as Beidou, GPS (Global Positioning System), GLONASS (Global Navigation Satellite System), and Galileo to achieve centimeter-level high-precision positioning functions. The positioning subsystem can provide accurate position information for applications such as driverless cars and precision agriculture.

[0063] The fifth daughter board 25 equipped with a positioning subsystem can be connected to the motherboard 10 through a 1×40Pin standard signal connector 20. Power supply, I / O, communication and other interfaces are all transmitted through this standard signal connector 20.

[0064] The digital key subsystem can implement the digital key function based on wireless communication technologies such as Bluetooth and UWB (Ultra Wide Band). Through the digital key subsystem, users can perform operations such as unlocking and starting the device through intelligent devices such as smartphones, improving the convenience and security of use.

[0065] The sixth daughter board 26 equipped with the digital key subsystem can be connected to the motherboard 10 through a 1×40Pin standard signal connector 20, and power supply, I / O, communication and other interfaces are all transmitted through this standard signal connector 20.

[0066] In this embodiment, the control subsystem is respectively connected to the cellular communication subsystem, the satellite communication subsystem, the audio subsystem, the digital key subsystem and the positioning subsystem; the cellular communication subsystem is respectively connected to the positioning subsystem, the audio subsystem and the satellite communication subsystem; the cellular communication subsystem is also connected to the debugging subsystem of the second-layer daughter board.

[0067] It should be noted that Figure 1 although the standard signal connectors 20 in [[ ]] are all represented by the same label, the standard signal connectors 20 in different positions represent different standard signal connectors 20.

[0068] In this embodiment, the vehicle-mounted communication terminal is functionally divided into the above-mentioned control subsystem, cellular communication subsystem, audio subsystem, satellite communication subsystem, positioning subsystem and digital key subsystem. Different functional subsystems are set on their respective separate daughter boards, which is convenient for pluggable replacement with the smallest subsystems, and can better achieve modular design, improve the reusability and iteration of the system, and simplify the design complexity. And each subsystem can be optimized and updated according to its characteristics. For example, the processor performance of the control subsystem, the sound quality processing of the audio subsystem, etc., reduce the dependence on the entire system and improve the flexibility. Through modular design, this embodiment allows the use of hardware resources more suitable for specific subsystems, thereby improving the overall performance. In addition, different subsystems can be combined into different system configurations to meet diverse application requirements, and it is convenient to quickly adjust the system configuration and functions according to market demands and technological developments. Modular design also allows reducing the overall cost by replacing or upgrading specific modules while maintaining the system performance, reducing unnecessary hardware redundancy, and improving the utilization rate of hardware resources.

[0069] The foregoing embodiment introduced the internal structure of the vehicle-mounted communication terminal. However, the vehicle-mounted communication terminal also needs to communicate with other devices of the vehicle to implement corresponding vehicle functions. To achieve communication with other devices of the vehicle, refer to Figure 1 , a main connector 12 for connecting to external devices is also provided on the motherboard 10.

[0070] The main connector 12 can be a 32-pin main connector.

[0071] The vehicle-mounted communication terminal realizes communication with external devices through the main connector 12. For example, it transmits signals to various controllers of the vehicle, and so on. Specifically, the control subsystem of the vehicle-mounted communication terminal communicates with external devices through the main connector 12.

[0072] In the foregoing embodiments, it is introduced that the first-layer daughter board includes multiple individual daughter boards provided with different functional subsystems. Next, the devices included in each functional subsystem and their connection relationships are further introduced.

[0073] In some embodiments, referring to Figure 1 and Figure 2 , the control subsystem may include an MCU (Microcontroller Unit) 211, a first crystal oscillator 212 connected to the MCU 211, a monitoring chip 213, a Real-Time Clock (RTC) chip 214, a first Controller Area Network (CAN) bus transceiver 215, and a second Controller Area Network (CAN) bus transceiver 216.

[0074] Among them, the MCU 211 is the main control unit of the vehicle-mounted communication terminal. The first crystal oscillator 212 is a crystal oscillator, which can be a high-speed / low-speed crystal oscillator and is an external crystal oscillator of the MCU 211. The monitoring chip 213 can be a hardware watchdog, which realizes the status monitoring of the MCU 11. The first Controller Area Network (CAN) bus transceiver 215 and the second Controller Area Network (CAN) bus transceiver 216 can both be CAN-FD transceivers. The second Controller Area Network (CAN) bus transceiver 216 can be used as a redundant or backup design. When needed, the second Controller Area Network (CAN) bus transceiver 216 is used.

[0075] The MCU 211 can be connected to the main connector 12, and can also be connected to the main connector 12 through the first Controller Area Network (CAN) bus transceiver 215 and the second Controller Area Network (CAN) bus transceiver 216.

[0076] The control subsystem provided by the embodiments of the present application considers the possible future development trends of the control subsystem. In order to achieve a compatible design, it includes various devices that the control subsystem may use in the future, so as to facilitate the rapid iterative update of the control subsystem. Specifically, the control subsystem includes a monitoring chip, which can be compatible with an MCU that does not implement software monitoring, and the hardware monitoring chip has higher security; the control subsystem includes two CAN-FD transceivers, one of which can be used for the existing CAN, and the other transceiver can be used as a backup. When needed in the future, for example, when it is necessary to be compatible with the communication of a private CAN, this transceiver can be used.

[0077] See Figure 1 and Figure 2 , the cellular communication subsystem includes a cellular communication module 221 and an independent Cellular Vehicle to Everything (C-V2X) communication module 222, a first Inertial Measurement Unit (IMU) 223, a memory 224, a Hardware Security Module (HSM) 225, a WIFI and Bluetooth module 226, a first Embedded-SIM (eSIM) 227, a cellular communication antenna 228, and a first Ethernet Physical (PHY) chip 229 that are connected to the cellular communication module 221.

[0078] Among them, the independent C-V2X communication module 222 is an independent module that needs to interact with the cellular communication module 221 and can rely on the cellular communication module 221 to perform related calculations. The cellular communication module 221 can be called NAD. Some cellular communication modules 221 have a C-V2X communication module inside, while some do not. Considering compatibility design, the cellular communication subsystem in the embodiments of the present application includes an independent C-V2X communication module 222.

[0079] The first IMU 223 can be a six-axis gyroscope. Although the first IMU 223 is connected to the cellular communication module 221, it actually works for the independent C-V2X communication module 222. After the data measured by it is calculated by the cellular communication module 221, the cellular communication module 221 sends the calculated data to the independent C-V2X communication module 222 for use. Based on the first IMU 223 and the positioning chip inside the cellular communication module 221, inertial navigation measurement can be achieved.

[0080] The memory 224 can be an eMMC (Embedded Multi Media Card) to store data for the cellular communication module 221.

[0081] The hardware security module 225 is a hardware security encryption chip that can implement signature and signature verification for the independent C-V2X communication module 222. The hardware security module 225 can be connected to the cellular communication module 221 or directly connected to the independent C-V2X communication module 222.

[0082] The WIFI and Bluetooth module 226 can be used to implement functions such as WIFI sharing and Bluetooth connection. The WIFI and Bluetooth module 226 can also be connected to a WIFI antenna, a Bluetooth antenna, and / or an integrated Bluetooth and WIFI antenna. Based on the WIFI and Bluetooth module 226, a user's mobile terminal can connect to the vehicle-mounted communication terminal, and then realize a satellite phone through the satellite communication subsystem; when the vehicle-mounted communication terminal fails or needs a program upgrade, the staff can directly connect to the vehicle-mounted communication terminal through the WIFI and Bluetooth module 226 to quickly solve the problem and upgrade the program, without connecting to the vehicle-mounted communication terminal through the vehicle's host computer again.

[0083] The cellular communication antenna 228 is the antenna of the cellular communication module 221 and is used for sending and receiving cellular communication signals.

[0084] The first Ethernet physical layer chip 229 can be a 1000BASE-T1 PHY chip and can implement Ethernet communication. The first Ethernet physical layer chip 229 is also connected to the Ethernet connector 220.

[0085] The cellular communication module 221 can be connected to the MCU 211.

[0086] In some possible implementation manners, the cellular communication subsystem may further include devices such as a USIM (Universal Subscriber Identity Module), a cable antenna, a 4-in-1 mini FAKRA, and a power chip. The USIM is connected to the cellular communication module.

[0087] Similar to the control subsystem, based on the same compatibility consideration, the cellular communication subsystem provided in the embodiments of the present application includes various devices that may be used in the future, so as to be compatible with different devices and realize rapid iterative updates of the cellular communication subsystem. Specifically, the cellular communication subsystem includes an independent cellular vehicle-to-everything (C-V2X) communication module 222, which can be compatible with a cellular communication module without a C-V2X communication module internally; the cellular communication subsystem includes a first inertial measurement unit 223, which can be used to implement inertial navigation measurement; the cellular communication subsystem includes a WIFI and Bluetooth module 226, which can realize functions such as satellite calls and rapid program upgrades.

[0088] See Figure 1 and Figure 2 , the positioning subsystem includes a positioning module 251 and a second inertial measurement unit 252.

[0089] Among them, the positioning module 251 may include a high-precision GNSS module, which is an independent high-precision positioning module for the PBOX. The second inertial measurement unit 252 is a high-precision IMU for the PBOX. The measurement accuracy of the second inertial measurement unit 252 is higher than that of the first inertial measurement unit 223.

[0090] The positioning module 251 can be connected to the cellular communication module 221 and can also be connected to the MCU 211. The second inertial measurement unit 252 can be connected to the MCU 211.

[0091] The positioning subsystem of the embodiment of the present application can achieve high-precision positioning and can output positioning data, providing accurate positioning data for intelligent driving.

[0092] See Figure 1 and Figure 2 , the audio subsystem includes an audio codec 232 and an audio amplifier 231.

[0093] The audio codec 232 can be an Audio Codec for encoding and decoding audio. The audio amplifier 231 can be an Audio AMP for amplifying audio. The audio subsystem can process various audio, such as audio processing during a call, etc.

[0094] The audio codec 232 is respectively connected to the cellular communication module 221 and the audio amplifier 231. The audio amplifier 231 is also connected to the MCU 211. The audio amplifier 231 can also be connected to a speaker for playing audio through the speaker. The audio codec 232 can also be connected to an audio acquisition device, such as a microphone, for acquiring audio.

[0095] In the embodiment of the present application, the audio codec 232 and the audio amplifier 231 are separately arranged on a sub-board, which can achieve quick replacement when one of the devices is damaged.

[0096] In some possible implementation manners, see Figure 1 and Figure 2 , the satellite communication subsystem may include a satellite communication module 241 and a second electronic subscriber identity module 242.

[0097] The second electronic subscriber identity module 242 can be an embedded subscriber identity module. The satellite communication module 241 is respectively connected to the cellular communication module 221, the MCU 211, and the second electronic subscriber identity module 242, and is also connected to a satellite communication antenna.

[0098] In this embodiment, functions such as satellite phone and satellite text message can be achieved through the satellite communication subsystem. By arranging it on a separate sub-board, quick replacement can be achieved.

[0099] See Figure 1 and Figure 2 the digital key subsystem may include an Ultra-Wideband (UWB) chip 262, a Bluetooth chip 261, and a secure encryption chip 263 connected to the Bluetooth chip.

[0100] Among them, the Bluetooth chip 261 may be a BLE (Bluetooth Low Energy) chip, and the secure encryption chip 263 may be an eSE (Embedded Secure Element) chip.

[0101] The secure encryption chip 263 is connected to the Bluetooth chip 261 for secure encryption. The Bluetooth chip 261 is also connected to the MCU 211 and the BLE antenna. The ultra-wideband chip 262 is respectively connected to the MCU 211 and the UWB antenna.

[0102] The digital key subsystem may further include a third crystal oscillator connected to the UWB chip 262 and a fourth crystal oscillator connected to the BLE chip 261.

[0103] The Bluetooth chip 261 can sense whether the vehicle owner is within the sensing range through the BLE antenna. When the vehicle owner is within the sensing range, the ultra-wideband chip 262 can be awakened. The ultra-wideband chip 262 locates the vehicle owner's position through the UWB antenna and automatically unlocks when the vehicle owner is at the door position and the door handle is pulled.

[0104] In the related art, the digital key function is only implemented through the Bluetooth chip 261, but the positioning accuracy achieved by the Bluetooth chip 261 is poor, and the digital key often fails. In the embodiments of the present application, by combining the ultra-wideband chip 262 and the Bluetooth chip 261, accurate positioning can be achieved, the probability of digital key failure can be reduced, and at the same time, the success rate of the remote control function can be improved. In addition, by setting the digital key subsystem in the vehicle-mounted communication terminal, chips can be shared with other subsystems, such as sharing the MCU, power management chip, etc., which can save chips and space occupied at the same time.

[0105] It should be noted that only the main devices of the control subsystem, cellular communication subsystem, positioning subsystem, audio subsystem, satellite communication subsystem, and digital key subsystem are given in the embodiments of the present application. According to actual needs, the control subsystem, cellular communication subsystem, positioning subsystem, audio subsystem, satellite communication subsystem, and digital key subsystem may further include other devices, which are not specifically limited herein.

[0106] The above has introduced each functional subsystem of the first-layer daughter board in detail. Next, each debugging subsystem on the second-layer daughter board will be introduced.

[0107] In some embodiments, seeFigure 1 , the second-layer daughter board is disposed on the second daughter board 22.

[0108] The second-layer daughter board includes a first debug daughter board 31 provided with an Application Processor (AP) and a second debug daughter board 32 provided with an Ethernet communication subsystem;

[0109] Both the first debug daughter board 31 and the second debug daughter board 32 are connected to the first-layer daughter board through their respective corresponding standard signal connectors 20.

[0110] The application processor can be a C-V2X AP or an application processor of other communication modules. When it is a C-V2X AP, it can provide calculation examples when there is no built-in C-V2X module in the cellular communication module and there are no calculation examples in the independent C-V2X communication module.

[0111] The C-V2X AP can be used to process the communication function of C-V2X. By setting it on the first-layer daughter board, that is, on the first debug daughter board 31, the C-V2X communication can be conveniently debugged and tested without affecting the normal operation of other subsystems.

[0112] See Figure 1 and Figure 2 , the Ethernet communication subsystem may include an Ethernet switch control chip (ETH Switch chip) 321, a second Ethernet PHY chip 322, a third Ethernet PHY chip 323, a second crystal oscillator 324, and a flash memory (FLASH) 325.

[0113] The Ethernet switch control chip 321 is respectively connected to the cellular communication module 221, the second Ethernet PHY chip 322, the third Ethernet PHY chip 323, the second crystal oscillator 324, and the flash memory 325. The second Ethernet PHY chip 322, the third Ethernet PHY chip 323, and the Ethernet switch control chip 321 are also connected to the Ethernet connector 220.

[0114] Among them, the second Ethernet PHY chip 322 can be a 1000BASE-T1 PHY chip; the third Ethernet PHY chip 323 can be a 100BASE-T1 PHY chip. The number of Ethernet PHY chips included in the Ethernet communication subsystem can be set according to actual needs and is not limited to two.

[0115] The Ethernet communication subsystem can be used to implement data exchange between network devices. To be compatible with the communication interconnection between multiple devices, the Ethernet communication subsystem is provided with an Ethernet switch control chip, which can be connected to multiple Ethernet PHY chips according to actual needs, providing multiple communication lines, and thus can easily connect the debugging device to other components in the system to achieve remote debugging and data transmission.

[0116] Each functional subsystem and each debugging subsystem provided in the embodiments of the present application consider future compatibility design, including as many devices as possible that may be used in the future, so as to enable rapid iterative updates of each functional subsystem and each debugging subsystem.

[0117] In the vehicle-mounted communication terminal, the layout positions of each device can be referred to Figure 1 and the connection relationships of each device can be referred to Figure 2 and will not be elaborated here.

[0118] Based on the vehicle-mounted communication terminal provided in the embodiments of the present application, the following takes the cellular communication subsystem as an example to introduce the hardware design process. Other subsystems are designed based on the same principle, and finally the goal of "building blocks" and "assembling T-BOX" is achieved.

[0119] Based on the requirement of modular pluggable replacement, the hardware architecture should support a variety of different communication daughter boards, including different manufacturers, different standards (4G, 5G), different 3GPP protocol versions (R15, R16), etc. These daughter boards can be replaced with the motherboard 10 through standardized interfaces and connection methods. In addition, different communication daughter boards should support corresponding communication protocols and frequency bands. Based on this, mainstream 4G communication modules and 5G communication modules can be selected for the design of communication daughter boards. By developing standardized interfaces and connectors, different communication daughter boards can be easily inserted and replaced, and finally the differentiated product requirements can be achieved by replacing the daughter boards, and rapid iterative verification can be carried out.

[0120] When the vehicle-mounted communication terminal that does not adopt the embodiments of the present application is used, the entire production process is: scheme → schematic diagram → layout → software development and debugging → experimental certification, which is relatively cumbersome and takes a long time. Each step requires rigorous demonstration and design, and once an error occurs, it needs to be redesigned, so the development cycle is relatively long.

[0121] After adopting the in-vehicle communication terminal provided by the embodiments of the present application, the entire production process becomes: T-BOX assembly prototype configuration (hardware / software) → layout → experimental certification. The software development and debugging process can be omitted, and the prototype configuration and experimental certification can be directly carried out, which can greatly shorten the development cycle. At the same time, due to the adoption of the T-BOX assembly method, the prototype configuration and experimental certification can be carried out quickly, improving the development efficiency and realizing agile development, and the original project implementation process can be simplified.

[0122] The solution provided by the embodiments of the present application starts from the system-level and component-level requirements of the 5G platform and tries to meet the requirements of future product planning. By encapsulating the materials into functional modules, the reuse on different platform products can be realized, and the purposes of rapid development iteration, cost reduction, supply guarantee, and quality guarantee can be achieved. In addition, the in-vehicle communication terminal provided by the embodiments of the present application can also realize the reserved expandability design and promote the prior design in the form of the motherboard 10 plus plug-ins.

[0123] Corresponding to the above in-vehicle communication terminal, an embodiment of the present invention further provides a vehicle, including any one of the above in-vehicle communication terminals, and having the same beneficial effects as the in-vehicle communication terminal.

[0124] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vehicle-mounted communication terminal, characterized in that: include: A motherboard provided with a power supply system; A first layer of daughter boards are arranged on the motherboard; the first layer of daughter boards are provided with a plurality of functional subsystems; as well as, A second layer of sub-board is arranged on the first layer of sub-board; the second layer of sub-board is provided with a plurality of debugging sub-systems; The motherboard and the first-layer daughter board, as well as the first-layer daughter board and the second-layer daughter board are connected via pluggable standard signal connectors.

2. The vehicle-mounted communication terminal according to claim 1, characterized in that: The first layer of sub-boards includes a first sub-board provided with a control sub-system, a second sub-board provided with a cellular communication sub-system, a third sub-board provided with an audio sub-system, a fourth sub-board provided with a satellite communication sub-system, a fifth sub-board provided with a positioning sub-system, and a sixth sub-board provided with a digital key sub-system; The first sub-board, the second sub-board, the third sub-board, the fourth sub-board, the fifth sub-board and the sixth sub-board are all connected to the motherboard through their corresponding standard signal connectors.

3. The vehicle-mounted communication terminal according to claim 2, characterized in that: The second layer sub-board is arranged on the second sub-board.

4. The vehicle-mounted communication terminal according to claim 1, characterized in that: The second layer of sub-boards includes a first debugging sub-board provided with an application processor and a second debugging sub-board provided with an Ethernet communication sub-system; The first debugging sub-board and the second debugging sub-board are both connected to the first layer of sub-boards through their corresponding standard signal connectors.

5. The vehicle-mounted communication terminal according to any one of claims 1 to 4, characterized in that: The motherboard is also provided with a main connector for connecting with external devices.

6. The vehicle-mounted communication terminal according to claim 2, characterized in that: The control subsystem comprises a micro control unit and a first crystal oscillator, a monitoring chip, a real-time clock chip, a first controller area network bus transceiver and a second controller area network bus transceiver connected to the micro control unit.

7. The vehicle-mounted communication terminal according to claim 2, characterized in that: The cellular communication subsystem includes a cellular communication module and an independent cellular Internet of Vehicles communication module connected to the cellular communication module, a first inertial measurement unit, a memory, a hardware security module, a WIFI and Bluetooth module, a first electronic user identification card, a cellular communication antenna and a first Ethernet physical layer chip.

8. The vehicle-mounted communication terminal according to claim 2, characterized in that: The positioning subsystem includes a positioning module and a second inertial measurement unit.

9. The vehicle-mounted communication terminal according to claim 2, characterized in that: The digital key subsystem includes an ultra-wideband chip, a Bluetooth chip, and a security encryption chip connected to the Bluetooth chip.

10. A vehicle, characterized in that: It comprises the vehicle-mounted communication terminal as claimed in any one of claims 1 to 9.

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