CN111988058A - Wireless communication device for vehicle and vehicle - Google Patents
Wireless communication device for vehicle and vehicle Download PDFInfo
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- CN111988058A CN111988058A CN201910428428.9A CN201910428428A CN111988058A CN 111988058 A CN111988058 A CN 111988058A CN 201910428428 A CN201910428428 A CN 201910428428A CN 111988058 A CN111988058 A CN 111988058A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3822—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving specially adapted for use in vehicles
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
- H04N7/147—Communication arrangements, e.g. identifying the communication as a video-communication, intermediate storage of the signals
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- Computer Networks & Wireless Communication (AREA)
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- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses a wireless communication device for a vehicle and the vehicle, wherein the wireless communication device comprises: the radio frequency transceiving module comprises a radio frequency transceiving controller; the baseband processing module comprises a baseband processor and is used for demodulating the wireless signal and modulating the signal to be transmitted into a radio frequency signal for being transmitted by the transmitter; the audio and video bridging module comprises an audio and video bridging processor and is used for transmitting the demodulated signals to the vehicle-mounted Ethernet bus and transmitting signals to be transmitted sent by the vehicle-mounted Ethernet bus to the baseband processor; and the power management module is used for respectively supplying power to the radio frequency transceiver controller, the baseband processor and the audio and video bridging processor. The wireless communication device can transmit audio and video by an Ethernet audio and video bridging protocol through the audio and video bridging module, so that low time delay of high-definition voice and video call is ensured, and user experience is improved.
Description
Technical Field
The present invention relates to the field of vehicle technologies, and in particular, to a wireless communication device for a vehicle and a vehicle.
Background
With the establishment of 5G (5th-Generation, fifth Generation mobile communication technology) standard, automobile-assisted driving and automatic unmanned driving become the current topic of hot spot, and the wireless communication module of the vehicle plays an increasingly important role, and the communication bus of the existing vehicle and the vehicle-mounted end is generally a CAN (Controller Area Network) bus or traditional ethernet communication. However, this prior art has two disadvantages: on one hand, the physical layer interface is an 8-wire RJ45 interface, the wiring is complex, the requirement of simplification of the wiring cannot be met, and the cost is high; on the other hand, the system cannot support an AVB (Audio Video Bridging) protocol, and cannot realize high-definition and low-delay voice and Video calls.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, an object of the present invention is to provide a wireless communication device for a vehicle, which can transmit audio and video via an ethernet audio and video bridging protocol through an audio and video bridging module, so as to ensure low time delay of high-definition voice and video calls and improve user experience.
Another object of the invention is to propose a vehicle.
To achieve the above object, an embodiment of a first aspect of the present invention provides a wireless communication device for a vehicle, including: the radio frequency transceiving module comprises a radio frequency transceiving controller, and the radio frequency transceiving controller is integrated with a receiver for receiving wireless signals and a transmitter for transmitting radio frequency signals; the baseband processing module comprises a baseband processor, and the baseband processor is respectively connected with the receiver and the transmitter and is used for demodulating the wireless signals and modulating signals to be transmitted into the radio-frequency signals for the transmitter to transmit; the audio and video bridging module comprises an audio and video bridging processor, and the audio and video bridging processor is connected with the baseband processor and is used for transmitting the demodulated signals to a vehicle-mounted Ethernet bus and transmitting signals to be transmitted, which are sent by the vehicle-mounted Ethernet bus, to the baseband processor; and the power management module is used for respectively supplying power to the radio frequency transceiver controller, the baseband processor and the audio and video bridging processor.
According to the wireless communication device for the vehicle, the audio and video bridging processor outputs a signal to be transmitted sent by the vehicle-mounted Ethernet bus to the baseband processor, the baseband processor modulates the signal to be transmitted into a radio frequency signal for the transmitter to transmit the radio frequency signal, the baseband processor demodulates the received wireless signal and then outputs the demodulated signal to the audio and video bridging module, and the audio and video bridging module transmits the demodulated signal to the Ethernet bus. Therefore, the wireless communication device can transmit the audio and the video by an Ethernet audio and video bridging protocol through the audio and video bridging module, so that low time delay of high-definition voice and video call is ensured, and user experience is improved.
In addition, the wireless communication device for a vehicle according to the above-described embodiment of the present invention may further have the following additional technical features:
according to an embodiment of the present invention, the radio frequency transceiver module further includes: the first end of the main antenna switch is connected with a main antenna arranged on the vehicle, and the second end of the main antenna switch is connected with the receiver, wherein when the first end and the second end of the main antenna switch are communicated, the receiver receives wireless signals through the main antenna; the power amplifier is connected with the third end of the main antenna switch at one end and the transmitter at the other end, and is used for amplifying radio-frequency signals, when the first end and the third end of the main antenna switch are communicated, the transmitter transmits the radio-frequency signals through the main antenna, and the power amplifier supplies power through the external power supply; a GNSS (Global Navigation Satellite System) antenna filter, one end of which is connected to a GNSS antenna provided on the vehicle and the other end of which is connected to the receiver, for performing filtering processing on a wireless signal received by the GNSS antenna; a diversity reception antenna switch, one end of which is connected to a diversity reception antenna provided on the vehicle; one end of the diversity receiving antenna filter is connected with the other end of the diversity receiving antenna switch, and the other end of the diversity receiving antenna filter is connected with the receiver and used for filtering the wireless signals received by the diversity receiving antenna.
According to an embodiment of the present invention, the baseband processing module further includes a memory and an identification module, wherein the memory and the identification module are both connected to the baseband processor.
According to an embodiment of the present invention, the audio/video bridging module further includes: the physical interface transceiver is connected with the audio and video bridging processor; the first end of the low-dropout linear regulator is connected with the power management module, the second end of the low-dropout linear regulator is connected with the power supply end of the audio and video bridging processor, and the third end of the low-dropout linear regulator is connected with the power supply end of the physical interface transceiver; a low pass filter coupled to the physical interface transceiver.
According to an embodiment of the present invention, the audio/video bridging module further includes: one end of the first filter capacitor is connected with the first end of the low dropout linear regulator, and the other end of the first filter capacitor is grounded; one end of the second filter capacitor is connected with the second end of the low dropout regulator, and the other end of the second filter capacitor is grounded; and one end of the third filter capacitor is connected with the third end of the low dropout regulator, and the other end of the third filter capacitor is grounded.
According to an embodiment of the present invention, the audio/video bridge processor and the baseband processor each have an HSIC/PCIe interface and an I2C interface, and are connected to the I2C interface through the HSIC/PCIe interface.
According to an embodiment of the present invention, the audio/video bridging processor and the physical interface transceiver each have an RGMII interface and an MDIO/MDC interface, and are connected to the MDIO/MDC interface through the RGMII interface, where the physical interface transceiver adopts an ethernet PHY chip, has differential interfaces TRD _ P and TRD _ N supporting 100/1000BASE-T1, and is connected to the low pass filter through the differential interfaces TRD _ P and TRD _ N.
According to an embodiment of the present invention, the wireless communication device for a vehicle further includes a package structure, the package structure is configured to package the rf transceiver module, the baseband processing module, the audio/video bridge module, and the power management module, and an outer surface of the package structure is provided with a plurality of pad interfaces, where the plurality of pad interfaces include: an ANT _ MAIN interface, an ANT _ GNSS interface, an ANT _ DIV interface, and a VBAT _ RF interface connected to the RF transceiver module, wherein the ANT _ MAIN interface is connected to one end of the MAIN antenna switch, the ANT _ GNSS interface is connected to one end of the GNSS antenna filter, the ANT _ DIV interface is connected to one end of the diversity receiving antenna switch, and the VBAT _ RF interface is connected to a power supply end of the power amplifier; the system comprises an SPI (serial peripheral interface), a USB (universal serial bus) interface, a plurality of UART (universal asynchronous receiver/transmitter) interfaces, a plurality of SDIO interfaces and a plurality of GPIO (general purpose input/output) interfaces, wherein the SPI interfaces, the USB interface, the plurality of UART interfaces and the plurality of GPIO interfaces are connected with a baseband processor, the SDIO interfaces comprise interfaces for WIFI connection and interfaces for SD card/eMMC connection, and the UART interfaces comprise a main string interface, an interface for Bluetooth connection and an interface for debugging Debug; ethernet interfaces TRD _ P and TRD _ N connected with the audio and video bridging processing module; and a VBAT _ BB interface, a VDD _ EXT interface, a startup interface PWRKEY, a reset interface REST _ N, an emergency shutdown interface SHDN _ N, a STATUS indicator lamp interface STATUS, a network lamp indication interface NET _ STATUS and an analog-digital conversion interface ADC which are connected with the power management module, wherein the power management module is used for converting power voltage received through the VBAT _ BB into power supply voltages required by the radio frequency transceiver controller, the baseband processor and the audio-video bridging processor so as to respectively supply power to the radio frequency transceiver controller, the baseband processor and the audio-video bridging processor, and the power management module is also used for supplying power to external equipment through the VDD _ EXT interface.
According to an embodiment of the present invention, the package structure adopts a grid array package manner, and a plurality of circular pad interfaces are disposed in the middle of the package structure as a ground interface.
In order to achieve the above object, a second aspect of the present invention provides a vehicle including the wireless communication device for a vehicle according to the first aspect of the present invention.
According to the vehicle provided by the embodiment of the invention, by adopting the wireless communication device for the vehicle and the audio and video bridging module, the audio and video can be transmitted by an Ethernet audio and video bridging protocol, so that low time delay of high-definition voice and video call is ensured, and the user experience is improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic configuration diagram of a wireless communication device for a vehicle according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a wireless communication device for a vehicle according to one example of the present invention;
fig. 3 is a schematic diagram of an exemplary audio video bridging processor according to the present invention;
Fig. 4 is a schematic structural view of a package structure according to an example of the present invention;
FIG. 5 is a schematic diagram of a plurality of pad interfaces according to one example of the invention;
fig. 6 is a block diagram of a vehicle according to an embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A wireless communication device for a vehicle and a vehicle according to an embodiment of the present invention will be described below with reference to the drawings.
Fig. 1 is a schematic configuration diagram of a wireless communication device for a vehicle according to an embodiment of the present invention.
As shown in fig. 1, the wireless communication device 100 for a vehicle includes: the device comprises a radio frequency transceiving module 10, a baseband processing module 20, an audio/video bridging module 30 and a power management module 40.
The radio frequency transceiving module 10 comprises a radio frequency transceiving controller 11, wherein the radio frequency transceiving controller 11 is integrated with a receiver 111 for receiving a wireless signal and a transmitter 112 for transmitting a radio frequency signal; the baseband processing module 20 includes a baseband processor 21, and the baseband processor 21 is respectively connected to the receiver 111 and the transmitter 112, and is configured to demodulate a wireless signal and modulate a signal to be transmitted into a radio frequency signal for the transmitter 112 to transmit; the audio/video bridging module 30 includes an audio/video bridging processor 31, and the audio/video bridging processor 31 is connected to the baseband processor 21, and is configured to transmit the demodulated signal to the vehicle-mounted ethernet bus a, and transmit a signal to be transmitted, which is sent by the vehicle-mounted ethernet bus a, to the baseband processor 21; the power management module 40 is used for respectively supplying power to the rf transceiver controller 11, the baseband processor 21 and the audio/video bridge processor 31.
Specifically, the vehicle-mounted ethernet a sends a signal to be transmitted to the audio processor 31, the audio/video bridging processor 31 transmits the signal to be transmitted to the baseband processor 21, and the baseband processor 21 may modulate the signal to be transmitted into a radio frequency signal (analog signal) and then transmit the radio frequency signal through the transmitter 112; meanwhile, the receiver 111 receives a wireless signal, the baseband processor 21 demodulates the wireless signal, converts the demodulated signal into a baseband signal (digital signal), and then outputs the digital signal to the audio/video bridge processor 31, and the audio/video bridge processor 31 processes the digital signal and transmits the processed digital signal to the vehicle-mounted ethernet bus a.
It should be noted that, as described above, the modem may be integrated in the baseband processor 21. Alternatively, the modem may be integrated in the rf transceiver controller 11, and the baseband processor 21 is only used for analog-to-digital conversion and digital-to-analog conversion, and the modulation and demodulation are respectively implemented by the rf transceiver controller 11. Specifically, the vehicle-mounted ethernet a sends a signal to be transmitted to the audio/video bridge processor 31, the audio/video bridge processor 31 transmits the signal to be transmitted to the baseband processor 21, the baseband processor 21 can convert the signal to be transmitted into an analog signal (low frequency) and transmit the analog signal to the radio frequency transceiver controller 11, and the radio frequency transceiver controller 11 modulates the analog signal into a radio frequency signal (high frequency) and transmits the radio frequency signal through the transmitter 112; meanwhile, the receiver 111 receives a wireless signal, the radio frequency transceiver controller 11 demodulates the wireless signal, and transmits the demodulated signal to the baseband processor 21, the baseband processor 21 may convert the demodulated signal into a digital signal, and then outputs the digital signal to the audio/video bridge processor 31, and the audio/video bridge processor 31 processes the digital signal and transmits the processed digital signal to the vehicle ethernet bus a.
It can be understood that information such as voice, video, etc. cannot be directly transmitted in a long distance, while radio frequency signals (signals with a certain transmitting frequency) can be transmitted in a long distance, and the baseband processor 21 and the radio frequency transceiver controller 11 convert and modulate information such as voice, video, etc. and then output radio frequency signals, and further transmit the radio frequency signals, so as to realize wireless transmission of information such as voice, video, etc.
Specifically, taking voice transmission as an example, a user can input a voice signal to be transmitted through a microphone at a vehicle-mounted end, the microphone can transmit the voice signal input by the user to the audio/video bridging processor 31 through the vehicle-mounted ethernet bus a, the audio/video bridging processor 31 processes the voice signal and then sends the processed voice signal to the baseband processor 21, the baseband processor 21 converts the voice signal into a radio frequency signal, and then the radio frequency signal is transmitted through the transmitter 112 to realize the transmission of the voice signal; meanwhile, the receiver 111 may receive a wireless signal, the wireless signal passes through the baseband processor 21, and restores the demodulated signal to a corresponding voice signal (baseband signal), and then outputs the signal to the vehicle-mounted ethernet bus a after being processed by the audio/video bridging processor 31, and the vehicle-mounted ethernet bus a may be connected to a vehicle-mounted loudspeaker or a speaker, and then sends out voice information through the loudspeaker or the speaker.
Preferably, as shown in fig. 2, the power management module 40 may include a power management device 41, a crystal oscillator 42 and a real-time clock 43, wherein the power management device 41 supplies power to the rf transceiver controller 11, the baseband processor 21 and the av bridge processor 31; the real-time clock 43 generates a clock signal, and the crystal oscillator generates a corresponding clock to drive the wireless communication device 100, and ensure the synchronous operation of the modules.
Therefore, the wireless communication device enables the audio and the video to be transmitted by an Ethernet audio and video bridging protocol through the audio and video bridging module, can ensure low time delay of high-definition voice and video call, and improves user experience.
In an embodiment of the present invention, as shown in fig. 2, the rf transceiver module 10 further includes: a main antenna switch 12, a power amplifier 13, a GNSS antenna filter 14, a diversity receive antenna switch 15 and a diversity receive antenna filter 16.
Wherein, the first end of the main antenna switch 12 is connected with the main antenna 1 arranged on the vehicle, the second end is connected with the receiver 111, wherein, when the first end and the second end of the main antenna switch 12 are communicated, the receiver 111 receives the wireless signal through the main antenna 1; one end of the power amplifier 13 is connected to the third end of the main antenna switch 12, and the other end is connected to the transmitter 112, and is configured to amplify the radio frequency signal, where when the first end of the main antenna switch 12 is communicated with the third end, the transmitter 112 transmits the radio frequency signal through the main antenna 1, and the power amplifier 13 supplies power through an external power supply; one end of the GNSS antenna filter 14 is connected to the GNSS antenna 2 provided on the vehicle, and the other end is connected to the receiver 111, and is configured to perform filtering processing on a wireless signal received by the GNSS antenna 2; one end of the diversity receiving antenna switch 15 is connected to a diversity receiving antenna 3 provided on the vehicle; the diversity receiving antenna filter 16 has one end connected to the other end of the diversity receiving antenna switch 15, and the other end connected to the receiver 111, and is configured to filter the wireless signal received by the diversity receiving antenna 3.
Specifically, for the radio frequency signal, after it is transmitted from the transmitter 112, it is power amplified by the power amplifier 13 to obtain enough radio frequency power for transmission through the main antenna 1. For wireless signals, they may be received by any one or more of the main antenna 1, GNSS antenna 2, diversity receive antenna 3. When the main antenna switch 12 is controlled to be closed, a wireless signal can be received through the main antenna 1 and transmitted to the receiver 111; after the wireless signals received by the GNSS antenna 2 are filtered by the GNSS antenna filter 14, unnecessary signals and interference signals in the wireless signals are filtered out and then transmitted to the receiver 111 for subsequent transmission; when the diversity receiving antenna switch 15 is controlled to be closed, a radio signal can be diversity-received by the diversity receiving antenna 3, and the radio signal is filtered by the diversity receiving antenna filter 16 to remove unwanted signals and interference signals and then transmitted to the receiver 111.
For this reason, the diversity receiving antenna 3 may include a plurality of antennas, and the receiver 111 may receive wireless signals of different paths through the plurality of antennas, and then select and combine these signals into an overall signal to mitigate the influence of signal fading, i.e., obtain the maximum signal gain.
Alternatively, the main antenna switch 12 may have a frequency selection function, and specifically, when a radio frequency signal having sufficient radio frequency power is transmitted through the main antenna 1, the main antenna switch 12 is closed and the radio frequency signal may be selected to be transmitted at a certain frequency, which may be 800MHz, 900MHz, 1800MHz, or the like. Therefore, the high efficiency of receiving wireless signals and transmitting radio frequency signals is guaranteed.
In one embodiment of the present invention, referring to fig. 2, the baseband processing module 20 further includes a memory 22 and an identification module 23, wherein the memory 22 and the identification module 23 are both connected to the baseband processor 21.
In this embodiment, the memory 22 may store relevant signals, such as digital signals, in the baseband processor 21, and the identification module 23 may identify the authority of the user according to the face information and/or fingerprint information of the user to determine whether the current user can perform wireless transmission through the wireless communication device 100. Therefore, the safety of wireless communication is guaranteed.
In an embodiment of the present invention, as shown in fig. 3, the av bridge module 30 further includes: a physical interface transceiver 32, a low dropout linear regulator 33 and a low pass filter 34.
The physical interface transceiver 32 is connected with the audio/video bridging processor 31; the first end of the low dropout regulator 33 is connected with the power management module 40, the second end is connected with the power supply end of the audio/video bridging processor 31, and the third end is connected with the power supply end of the physical interface transceiver 32; the low pass filter 34 is connected to the physical interface transceiver 32.
Further, referring to fig. 3, the audio/video bridging module 30 may further include: a first filter capacitor C1, a second filter capacitor C2, and a third filter capacitor C3.
One end of the first filter capacitor C1 is connected to the first end of the low dropout regulator 33, and the other end is grounded GND; one end of the second filter capacitor C2 is connected to the second end of the low dropout regulator 33, and the other end is grounded GND; one end of the third filter capacitor C3 is connected to the third end of the low dropout regulator 33, and the other end is grounded GND.
In this embodiment, the output voltage of the power management module 40 is output to the audio/video bridge processor 31 and the physical interface transceiver 32 through the low dropout regulator 33 to provide a stable voltage to the audio/video bridge processor 31 and the physical interface transceiver 32, and the first filter capacitor C1, the second filter capacitor C2, and the third filter capacitor C3 may eliminate noise in the voltage to avoid the influence of the noise on the audio/video bridge module 30.
In one embodiment of the invention, referring to fig. 2, the av bridge processor 31 and the baseband processor 21 each have an HSIC/PCIe interface and an I2C interface and are connected via the HSIC/PCIe interface and an I2C interface.
In one example, referring to fig. 3, the video bridging processor 31 and the physical interface transceiver 32 may each have an RGMII interface and an MDIO/MDC interface and are connected via the RGMII interface and the MDIO/MDC interface, wherein the physical interface transceiver 32 employs an ethernet PHY chip, has differential interfaces TRD _ P and TRD _ N supporting 100/1000BASE-T1, and is connected to the low pass filter 34 via the differential interfaces TRD _ P and TRD _ N.
Specifically, the RGMII interface and the MDIO/MDC interface of the audio/video bridge processor 31 are both pulse interfaces, and transmit data at the same time on the rising edge and the falling edge, and the transmission rate can reach 1000Mbps, and the audio/video bridge processor 31 can output a control signal to the physical interface transceiver 32 through the MDIO/MDC to configure the physical interface transceiver 32, so that data is received and transmitted between the physical interface transceiver 32 and the audio/video bridge processor 31 through the RGMII interface.
In this embodiment, the audio/video bridge module 30 provides the differential interfaces TRD _ P and TRD _ N with support of 100/1000BASE-T1 to the outside, that is, only one pair of differential lines is needed to connect to the Vehicle-mounted terminal and other devices in the Vehicle, which greatly simplifies the wiring complexity, reduces the wiring cost, and simultaneously, can provide 1000M ethernet bandwidth, can improve the transmission bandwidth and transmission speed of the audio/video, and provide bandwidth guarantee for the transmission of large data, for example, the V2X (Vehicle to external information exchange) technology.
In an embodiment of the present invention, as shown in fig. 4, the wireless communication device 100 for a vehicle further includes a package structure 50, where the package structure 50 is used to package the rf transceiver module 10, the baseband processing module 20, the av bridge module 30, and the power management module 40, and an outer surface of the package structure 50 is provided with a plurality of pad interfaces, where, as shown in fig. 5, the plurality of pad interfaces include: an ANT _ MAIN interface, an ANT _ GNSS interface, an ANT _ DIV interface, and a VBAT _ RF interface connected to the RF transceiver module 10, an SPI interface, a USB interface, a plurality of UART interfaces, a plurality of SDIO interfaces, and a plurality of GPIO interfaces connected to the baseband processor 21, ethernet interfaces TRD _ P and TRD _ N connected to the audio/video bridge processing module 30, and a VBAT _ BB interface, VDD _ EXT interface, power on interface PWRKEY, reset interface REST _ N, emergency power off interface SHDN _ N, STATUS indicator light interface STATUS, network light indicator interface NET _ STATUS, and analog-to-digital conversion interface ADC connected to the power management module 40.
An ANT _ MAIN interface is connected with one end of the MAIN antenna switch 12, an ANT _ GNSS interface is connected with one end of the GNSS antenna filter 14, an ANT _ DIV interface is connected with one end of the diversity reception antenna switch 15, and a VBAT _ RF interface is connected with a power supply end of the power amplifier 13; the SDIO interfaces comprise interfaces for WIFI connection and interfaces for SD card/eMMC connection, and the UART interfaces comprise main string interfaces, interfaces for Bluetooth connection and interfaces for debugging Debug; the power management module 40 is configured to convert a power voltage received through VBAT _ BB into power voltages required by the rf transceiver controller 11, the baseband processor 21, and the audio/video bridge processor 31 to respectively supply power to the rf transceiver controller 11, the baseband processor 21, and the audio/video bridge processor 31, and the power management module 40 is further configured to supply power to an external device through a VDD _ EXT interface.
Further, referring to fig. 4, the package structure 50 adopts an LGA (Land Grid Array) package method, and a plurality of circular pad interfaces are disposed in the middle of the package structure 50 as ground interfaces.
Optionally, the VDD _ EXT interface may output a voltage of 1.8V to supply power to an external device (e.g., other device on the vehicle side). A plurality of (e.g., 261) LGA pads may be disposed in the middle of the package structure 50, and in addition to the power signal interface, one of the pads may be a reserve pin for internal testing, and the other pad may be a ground pad on which a plurality of circular pad interfaces are disposed as ground interfaces.
In conclusion, the wireless communication device for the vehicle can enable audio and video to be transmitted by an Ethernet audio and video bridging protocol, so that low time delay of high-definition voice and video call is ensured, and user experience is improved; the wireless communication device can provide 1000M Ethernet bandwidth, improve the transmission bandwidth and transmission speed of audio and video, provide guarantee for big data transmission, simultaneously support the Ethernet interface, only need a pair of differential wires, can connect the wireless communication device to the vehicle-mounted end, greatly simplify wiring complexity, and reduce wiring cost; when a plurality of circular pad interfaces ground connection, can provide quick scattering to the mainboard is in time scattered fast to guarantee wireless communication device's heat, is favorable to promoting this communication device's performance.
Fig. 6 is a block diagram of a vehicle according to an embodiment of the invention.
As shown in fig. 6, the vehicle 100 includes the wireless communication device 100 for a vehicle of the embodiment of the present invention.
According to the vehicle provided by the embodiment of the invention, by adopting the wireless communication device for the vehicle and the audio and video bridging module, the audio and video can be transmitted by an Ethernet audio and video bridging protocol, so that low time delay of high-definition voice and video call is ensured, and user experience is improved.
In addition, other configurations and functions of the vehicle according to the embodiment of the present invention are known to those skilled in the art, and are not described herein in detail to reduce redundancy.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A wireless communication device for a vehicle, comprising:
the radio frequency transceiving module comprises a radio frequency transceiving controller, and the radio frequency transceiving controller is integrated with a receiver for receiving wireless signals and a transmitter for transmitting radio frequency signals;
the baseband processing module comprises a baseband processor, and the baseband processor is respectively connected with the receiver and the transmitter and is used for demodulating the wireless signals and modulating signals to be transmitted into the radio-frequency signals for the transmitter to transmit;
the audio and video bridging module comprises an audio and video bridging processor, and the audio and video bridging processor is connected with the baseband processor and is used for transmitting the demodulated signals to a vehicle-mounted Ethernet bus and transmitting signals to be transmitted, which are sent by the vehicle-mounted Ethernet bus, to the baseband processor;
And the power management module is used for respectively supplying power to the radio frequency transceiver controller, the baseband processor and the audio and video bridging processor.
2. The wireless communication device for a vehicle according to claim 1, wherein the radio frequency transceiver module further comprises:
the first end of the main antenna switch is connected with a main antenna arranged on the vehicle, and the second end of the main antenna switch is connected with the receiver, wherein when the first end and the second end of the main antenna switch are communicated, the receiver receives wireless signals through the main antenna;
the power amplifier is connected with the third end of the main antenna switch at one end and the transmitter at the other end, and is used for amplifying radio-frequency signals, when the first end and the third end of the main antenna switch are communicated, the transmitter transmits the radio-frequency signals through the main antenna, and the power amplifier supplies power through the external power supply;
the GNSS antenna filter is connected with a GNSS antenna arranged on the vehicle at one end and connected with the receiver at the other end, and is used for filtering wireless signals received by the GNSS antenna;
A diversity reception antenna switch, one end of which is connected to a diversity reception antenna provided on the vehicle;
one end of the diversity receiving antenna filter is connected with the other end of the diversity receiving antenna switch, and the other end of the diversity receiving antenna filter is connected with the receiver and used for filtering the wireless signals received by the diversity receiving antenna.
3. The wireless communication device for a vehicle according to claim 1, wherein the baseband processing module further comprises a memory and an identification module, wherein the memory and the identification module are both coupled to the baseband processor.
4. The wireless communication device for a vehicle according to claim 1, wherein the av bridge module further comprises:
the physical interface transceiver is connected with the audio and video bridging processor;
the first end of the low-dropout linear regulator is connected with the power management module, the second end of the low-dropout linear regulator is connected with the power supply end of the audio and video bridging processor, and the third end of the low-dropout linear regulator is connected with the power supply end of the physical interface transceiver;
A low pass filter coupled to the physical interface transceiver.
5. The wireless communication device for a vehicle according to claim 4, wherein the av bridge module further comprises:
one end of the first filter capacitor is connected with the first end of the low dropout linear regulator, and the other end of the first filter capacitor is grounded;
one end of the second filter capacitor is connected with the second end of the low dropout regulator, and the other end of the second filter capacitor is grounded;
and one end of the third filter capacitor is connected with the third end of the low dropout regulator, and the other end of the third filter capacitor is grounded.
6. The wireless communication device for a vehicle of claim 1, wherein the audio video bridge processor and the baseband processor each have an HSIC/PCIe interface and an I2C interface and are connected to the I2C interface through the HSIC/PCIe interface.
7. The wireless communication apparatus for vehicle according to claim 4, wherein the av bridge processor and the physical interface transceiver each have an RGMII interface and an MDIO/MDC interface and are connected to the MDIO/MDC interface through the RGMII interface, and wherein the physical interface transceiver employs an ethernet PHY chip, has differential interfaces TRD _ P and TRD _ N supporting 100/1000BASE-T1, and is connected to the low pass filter through the differential interfaces TRD _ P and TRD _ N.
8. The wireless communication device for a vehicle according to claim 1, further comprising a package structure, wherein the package structure is configured to package the rf transceiver module, the baseband processing module, the av bridge module, and the power management module, and an outer surface of the package structure is provided with a plurality of pad interfaces, wherein the plurality of pad interfaces include:
an ANT _ MAIN interface, an ANT _ GNSS interface, an ANT _ DIV interface, and a VBAT _ RF interface connected to the RF transceiver module, wherein the ANT _ MAIN interface is connected to one end of the MAIN antenna switch, the ANT _ GNSS interface is connected to one end of the GNSS antenna filter, the ANT _ DIV interface is connected to one end of the diversity receiving antenna switch, and the VBAT _ RF interface is connected to a power supply end of the power amplifier;
the system comprises an SPI (serial peripheral interface), a USB (universal serial bus) interface, a plurality of UART (universal asynchronous receiver/transmitter) interfaces, a plurality of SDIO interfaces and a plurality of GPIO (general purpose input/output) interfaces, wherein the SPI interfaces, the USB interface, the plurality of UART interfaces and the plurality of GPIO interfaces are connected with a baseband processor, the SDIO interfaces comprise interfaces for WIFI connection and interfaces for SD card/eMMC connection, and the UART interfaces comprise a main string interface, an interface for Bluetooth connection and an interface for debugging Debug;
Ethernet interfaces TRD _ P and TRD _ N connected with the audio and video bridging processing module; and a VBAT _ BB interface, a VDD _ EXT interface, a startup interface PWRKEY, a reset interface REST _ N, an emergency shutdown interface SHDN _ N, a STATUS indicator lamp interface STATUS, a network lamp indication interface NET _ STATUS and an analog-digital conversion interface ADC which are connected with the power management module, wherein the power management module is used for converting power voltage received through the VBAT _ BB into power supply voltages required by the radio frequency transceiver controller, the baseband processor and the audio-video bridging processor so as to respectively supply power to the radio frequency transceiver controller, the baseband processor and the audio-video bridging processor, and the power management module is also used for supplying power to external equipment through the VDD _ EXT interface.
9. The wireless communication device for a vehicle according to claim 8, wherein the package structure body adopts a grid array package manner, and a plurality of circular pad interfaces are provided in the middle of the package structure body as a ground interface.
10. A vehicle characterized by comprising a wireless communication device for a vehicle according to any one of claims 1-9.
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| CN201910428428.9A CN111988058A (en) | 2019-05-22 | 2019-05-22 | Wireless communication device for vehicle and vehicle |
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| CN201910428428.9A CN111988058A (en) | 2019-05-22 | 2019-05-22 | Wireless communication device for vehicle and vehicle |
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