CN114759945A - Wireless transceiver, ETC system and data wireless transmission method - Google Patents

Abstract

The invention discloses a wireless transceiver, an ETC system and a data wireless transmission method, wherein the wireless transceiver comprises an outdoor control unit and a radio frequency transceiver unit; the outdoor control unit comprises a first core board, a first verification module and a coding modulation module; the first verification module is connected with the first core board, and the coding modulation module is connected with the first core board and configured to code, decode and modulate the received and transmitted signals; the first core board is configured to process data from the first verification module and the code modulation module, or receive service data from the edge calculation unit; the radio frequency transceiving unit comprises a radio frequency transmitting module and a radio frequency receiving module. The wireless transceiver of the scheme has the advantages of high data transmission rate, large communication area and low time delay; when being applied to the ETC system, can also realize better user service to the harmless quick transmission high-quality service data of OBU equipment under different use scenes in addition to accomplishing conventional deduction and identification.

Description

Wireless transceiver, ETC system and data wireless transmission method

Technical Field

The present invention relates to the field of ETC systems, and more particularly, to a wireless transceiver, an ETC system and a wireless data transmission method.

Background

The current electronic toll collection system (ETC) utilizes computer networking technology and bank to carry out background settlement processing through the special short-range communication that carries out between the on-vehicle electronic tags who installs on vehicle windshield and the microwave antenna on toll station ETC lane to reach the purpose that the vehicle can accept highway or bridge expense through highway or bridge toll station without stopping. The roadside microwave antenna and the vehicle-mounted electronic tag are based on a 5.8G Radio Frequency Identification (RFID) technology, a low-end ASK modulation mode is adopted, the data transmission rate is only 256Kbit/s in downlink and 512Kbit/s in uplink, and only small data amount of instruction information can be transmitted in a short passing time. Therefore, the current ETC system can only be used for vehicle identification and non-stop fee deduction.

Along with the development of ETC, the user group of ETC is more and more, and the contradiction between the demand diversification of user and the single function of current ETC is bigger and bigger. The ETC system cannot only provide a charging function, but also needs to provide services to users, such as road condition information broadcasting, real-time danger early warning, lane cooperative application and the like, and can also make full use of route information collected through an ITS (intelligent transportation system) to expand into a brand-new service system.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Disclosure of Invention

In order to solve the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a wireless transceiver, an ETC system and a wireless data transmission method.

In order to achieve the purpose, the technical scheme of the invention is as follows:

in a first aspect, the present invention provides a wireless transceiver device, including an outdoor control unit and a radio frequency transceiver unit;

the outdoor control unit comprises a first core board, a first verification module and a coding modulation module; the first verification module is connected with the first core board and configured to encrypt and verify transaction information; the coding modulation module is connected with the first core board and is configured to code and decode the transceiving signals and modulate the signals; the first core board is configured to process data from the first verification module and the code modulation module, or receive service data from an edge calculation unit;

the radio frequency transceiving unit comprises a radio frequency transmitting module and a radio frequency receiving module which are connected with the code modulation module; the radio frequency transmitting module is provided with a plurality of transmitting channels and is configured to radiate transmitting signals to a target area; the radio frequency receiving module is provided with a plurality of receiving channels, configured to receive uplink signals from a monitoring area, and transmitted to the code modulation module.

The system further comprises an indoor control unit, wherein the indoor control unit comprises a second core board, a communication module and a second verification module; the communication module connects the second core board with the edge computing unit, and the second core board and the edge computing unit perform data communication through the communication module; the second verification module is connected with the second core board and configured to encrypt and verify transaction information; the second core board is connected to the first core board and configured to transmit service data from the edge computing unit to the first core board or receive reception data transmitted from the outdoor control unit.

Further, the transmission channel comprises a voltage-controlled oscillator, a band-pass filter, a power amplifier and a transmission antenna; the input end of the voltage-controlled oscillator is connected with the code modulation module, the output end of the voltage-controlled oscillator is connected with the input end of the band-pass filter, the output end of the band-pass filter is connected with the input end of the power amplifier, the output end of the power amplifier is connected with the transmitting antenna, and a transmitting signal is radiated to a target area through the transmitting antenna.

Further, the receiving channel comprises a low noise amplifier, a mixer, a low pass filter, an envelope detector and a receiving antenna; the output end of the envelope detector is connected with the coding modulation module, the input end of the envelope detector is connected with the output end of the low-pass filter, the input end of the low-pass filter is connected with the output end of the mixer, the input end of the mixer is connected with the output end of the low-noise amplifier, the input end of the low-noise amplifier is connected with the receiving antenna, and the receiving antenna receives uplink signals from a monitoring area.

Further, the second core board is connected with the first core board through an ethernet interface; the second core board is connected with the edge computing unit through an Ethernet interface.

In a second aspect, the invention provides an ETC system including a wireless transceiver device as described above.

In a third aspect, the present invention provides a data wireless transmission method applied to the downlink of the above-mentioned wireless transceiver, including the following steps:

acquiring emission data;

coding the transmitting data through a coding modulation module to obtain coded transmitting data;

carrying out GFSK modulation on the coded transmitting data through a radio frequency transmitting module to obtain a modulated transmitting signal modulated on a target channel;

and the modulated transmission signal is radiated to a target area through a transmission channel of a radio frequency transmission module to finish transmitting data.

Further, the step of acquiring emission data includes;

the service information is converted into transmission data by the edge computing unit, and the transmission data is acquired from the edge computing unit through the Ethernet.

In a fourth aspect, the present invention provides a data wireless transmission method applied to the uplink of the wireless transceiver device, including the following steps:

receiving uplink signals from a monitoring area through a plurality of receiving channels of a radio frequency receiving module;

demodulating the uplink signal through a radio frequency receiving module to obtain a demodulated received signal;

and decoding the demodulated received signal through a coding modulation module to obtain received data, and completing the uploading of the received data.

Further, the step of decoding the demodulated received signal by the code modulation module to obtain received data and completing uploading of the received data includes;

and sending the received data to an edge computing unit through Ethernet, and carrying out data processing on the received data through the edge computing unit.

Compared with the prior art, the invention has the beneficial effects that: the invention provides a wireless transceiver, an ETC system and a data wireless transmission method, the wireless transceiver of the scheme modulates or demodulates a transmitting and receiving signal GFSK by using a multi-channel radio frequency transmitting and receiving unit, can realize the data transmission rate of at least 4Mbps, and has the advantages of high data transmission rate, large communication area and low time delay; when being applied to the ETC system, can satisfy the function of conventional ETC deduction and identification, can also satisfy not haring the high-quality service data of quick transmission to OBU equipment under the different use scenes, realize better user service.

The invention is further described below with reference to the figures and the specific embodiments.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a block diagram of a wireless transceiver according to an embodiment of the present invention;

fig. 2 is a block diagram of a transmit channel of a wireless transceiver according to an embodiment of the present invention;

fig. 3 is a block diagram of a receiving channel of a wireless transceiver according to an embodiment of the present invention;

fig. 4 is a block diagram of a wireless transceiver device according to another embodiment of the present invention;

fig. 5 is a flowchart illustrating a wireless data transmission method according to an embodiment of the present invention;

fig. 6 is a flowchart illustrating a data wireless transmission method according to another embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be further understood that the term "and/or" as used in this specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items and includes such combinations.

The noun interpretation:

OBU equipment (On board Unit), On-board Unit, ETC system, OBU equipment is put On the car, and the roadside sets up the trackside equipment, carries out the communication through the microwave each other.

Fig. 1 is a schematic block diagram of a wireless transceiver according to an embodiment of the present invention. Referring to fig. 1, the wireless transceiver device of the present embodiment includes an outdoor control unit 10 and a radio frequency transceiver unit 20. According to the scheme, the outdoor control unit 10 radiates service data to a target area through the radio frequency transceiving unit 20, or receives uploaded data from other terminals through the radio frequency transceiving unit 20, and the outdoor control unit has the characteristics of high data transmission rate, large communication area and low time delay, and can meet the requirements of lossless and rapid high-quality image, voice and video stream data transmission under different application scenes. Specifically, the wireless transceiver of this embodiment may be applied to an ETC system, and performs wireless data transmission with an on-board OBU device.

The outdoor control unit 10 of the present embodiment serves as the core of the entire radio transmitting and receiving apparatus. Referring to fig. 1, the outdoor control unit 10 includes a first core board 11, a first verification module 13, and a coded modulation module 12. The first verification module 13 is connected with the first core board 11 and configured to perform encryption verification on the transaction information; the coding modulation module 12 is connected to the first core board 11, and is configured to encode and decode the transmission and reception signals and modulate the signals; the first core board 11 is connected to the edge technology unit, configured to process data from the first verification module 13 and the code modulation module 12, and performs data communication and deployment of application software with the edge calculation unit 40.

The edge calculating unit 40 serves as a provider of service resources, and may transmit service data to the outdoor control unit 10, and then further transmit the service data through the radio frequency transceiver unit 20, or quickly transmit an uplink signal received by the radio frequency transceiver unit 20 to the edge calculating unit 40 through an ethernet interface for output screening and processing after the uplink signal is processed by the outdoor control unit 10. The service data comprises data converted from text, voice, pictures, video and the like of information broadcasting.

In this embodiment, the code modulation module 12 is an FPGA (Field Programmable Gate Array). The first authentication module 13 is provided with a PSAM card.

Referring to fig. 1, the rf transceiver unit 20 of the present embodiment includes an rf transmitting module 21 and an rf receiving module 22 connected to the code modulation module 12; the radio frequency transmitting module 21 is provided with a plurality of transmitting channels configured to radiate transmitting signals to a target area; the rf receiving module 22 is provided with a plurality of receiving channels, configured to receive the uplink signals from the monitoring area, and transmit the uplink signals to the code modulation module 12.

In this embodiment, in order to satisfy the innovative characteristics of the wireless transceiver device, such as long communication area, high data transmission rate, high concurrency, low latency, simultaneous access by multiple users, and easy design and commercialization for implementation, the radio frequency architecture of the whole radio frequency transceiver unit 20 adopts a multi-channel frequency division full duplex mechanism, that is, a multi-transmission channel frequency division full duplex and a multi-reception channel frequency division full duplex operating mode, and the modem mode adopts GFSK, so as to achieve a data transmission rate of at least 4 Mbps.

Referring to fig. 2, the transmission channel of the present embodiment includes a voltage-controlled oscillator 211, a band-pass filter 212, a power amplifier 213, and a transmission antenna 214; the input end of the voltage-controlled oscillator 211 is connected to the code modulation module 12, the output end is connected to the input end of the band-pass filter 212, the output end of the band-pass filter 212 is connected to the input end of the power amplifier 213, the output end of the power amplifier 213 is connected to the transmitting antenna 214, and the transmitting antenna 214 radiates the transmitting signal to the target area.

In this embodiment, the code modulation module 12 is used as a main control chip for coding and modulating the transmission channel, and the code modulation module 12 is configured to control the voltage-controlled oscillator 211 to perform GFSK modulation and channel interval division on the transmission signal, or to encode and decode the transmission signal. When the voltage controlled oscillator 211 (VCO) is controlled to perform GFSK modulation and channel spacing division, the specific GFSK frequency offset is 1MHz, the channel spacing is 5MHz, and the specific division is as shown in the following table:

transmission channel	5830MHz	5835 MHz	5840MHz	…
					GFSK modulation frequency	5829MHz 5831MHz	5834MHz 5836MHz	5839MHz 5841MHz	…

The output of the voltage-controlled oscillator 211 of each transmit channel is connected to a band-pass filter 212 (BPF), which performs out-of-band spurious suppression by the band-pass filter 212, then enters a power amplifier 213 (PA) for signal amplification, and finally radiates the signal to the working area through a transmit antenna 214.

Referring to fig. 3, the reception channel of the present embodiment includes a low noise amplifier 224, a mixer 223, a low pass filter 222, an envelope detector 221, and a reception antenna 225; the output end of the envelope detector 221 is connected to the coded modulation module 12, the input end is connected to the output end of the low-pass filter 222, the input end of the low-pass filter 222 is connected to the output end of the mixer 223, the input end of the mixer 223 is connected to the output end of the low-noise amplifier 224, the input end of the low-noise amplifier 224 is connected to the receiving antenna 225, and the uplink signal from the monitored area is received through the receiving antenna 225.

In this embodiment, different receive channels (receive channels 1-n) are responsible for receiving different upstream signals. An uplink signal received by the receiving antenna 225 is amplified by a low noise amplifier 224 (LNA), and then enters a mixer 223 (MIX) for down-conversion, wherein the down-conversion is performed to reduce the carrier frequency of the signal or directly remove the carrier frequency to obtain a baseband signal. The down-converted signal passes through a low pass filter 222 (LPF) to suppress the high frequency modulation point of the GFSK modulated signal, so as to convert the FSK modulated spectrum into an ASK modulated spectrum, then enters an envelope detector 221 to perform envelope detection to output an analog envelope waveform of the original signal, and finally enters a code modulation module 12 to perform demodulation and decoding, so as to restore the original data, thereby completing the reception of the uplink signal/data.

For example, on-vehicle OBU equipment passes through the CAN bus with the vehicle and links to each other, and the vehicle controller converts the data message that the vehicle was gathered including text sound, picture, video that the information was reported into data, sends OBU equipment for through the CAN bus as required. The OBU equipment sends the data information to the wireless transceiver through a 5.8GHz high-frequency signal, and the data information is received by the receiving antenna 225 and then transmitted to a receiving channel; the receiving channel performs low noise amplification on the received 5.8GHz high frequency signal, demodulates the signal in the radio frequency chip, and transmits the demodulated signal to the code modulation module 12 for decoding. The data decoded by the coding modulation module 12 is transmitted to the first core board 11 through the GPMC bus, and the first core board 11 sends the data sub-packets to the edge calculation unit through the high-speed ethernet for data summarization, display and validity discrimination.

The wireless transceiver device of the embodiment can be independently arranged to realize high-speed data transmission and reception and realize wireless high-speed transmission only by comprising the outdoor control unit 10 and the radio frequency transceiver unit 20, and can be particularly and directly arranged in scenes such as expressway ramp branching and merging, tunnel entrances and exits, urban complex roads and the like which are inconvenient for installing indoor control units. When the core board is normally used, the first core board 11 acquires transmission data from the edge technology unit, the transmission data includes but is not limited to high-quality large-capacity data such as picture, voice and video stream data, and the transmission data is modulated in a 5.8GHz channel through the coding modulation module 12, the debugging mode is GFSK, the data rate reaches 4Mbit/s, and the data transmission rate is far higher than the existing transmission mode; finally, the modulated 5.8GHz high-frequency signal is radiated to a vehicle passing area of an expressway and an urban road through the transmitting antenna 214, and after receiving the transmitted data, the vehicle-mounted equipment demodulates and decodes the data, restores the data into information such as voice characters, pictures, videos and the like, and provides I2V service for the vehicle.

The wireless transceiver of the embodiment has the advantages of high data transmission rate, large communication area and low time delay; when being applied to the ETC system, can satisfy the function of conventional ETC deduction and identification, can also satisfy not haring the high-quality service data of quick transmission to OBU equipment under the different use scenes, realize better user service.

Fig. 4 is a schematic block diagram of a wireless transceiver according to another embodiment of the present invention. Referring to fig. 4, the wireless transceiver of this embodiment further includes an indoor control unit 30 in addition to the outdoor control unit 10 and the rf transceiver unit 20, and the outdoor control unit 10 and the rf transceiver unit 20 of this embodiment are the same as the above embodiments, and thus are not described herein again

Specifically, the indoor control unit 30 includes a second core board 31, a communication module 32, and a second verification module 33; the communication module 32 connects the second core board 31 with the edge computing unit 40, the second core board 31 and the edge computing unit 40 perform data communication through the communication module 32, and transmit service data from the edge computing unit 40 to the second core board 31, or the second core board 31 uploads received data to the edge computing unit 40; the second verification module 33 is connected to the second core board 31 and configured to perform encryption verification on the transaction information; the second core board 31 is connected to the first core board 11 and configured to transmit service data from the edge computing unit 40 to the first core board 11, or the rf transceiver unit 20 receives an uplink signal from the monitoring area, and the outdoor control unit 10 finally transmits the received data to the edge computing unit 40.

The edge calculating unit 40 serves as a provider of service resources, and may transmit service data to the indoor control unit 30, and then the indoor control unit 30 performs packetization and transmits the packetized service data to the outdoor control unit 10 through the high-speed ethernet interface, and further performs transmission through the radio frequency transceiver unit 20, or an uplink signal received by the radio frequency transceiver unit 20 is processed by the outdoor control unit 10, and then is quickly transmitted to the edge calculating unit 40 through the ethernet interface through the indoor control unit 30 for output screening and processing. The service data includes data converted from text, voice, picture, video, etc. for information broadcast.

In this embodiment, the second core board 31 is connected to the first core board 11 through an ethernet interface; the second core board 31 is connected to the edge computing unit 40 via an ethernet interface. The second core board 31 is connected with the first core board 11 and the edge computing unit 40 through high-speed ethernet interfaces, which can ensure that service data or received data can be transmitted at high speed inside the wireless transceiver; the transmission data is modulated in a channel of 5.8GHz by matching with the coding modulation module 12, the debugging mode is GFSK, the data rate reaches 4Mbit/s, and the data transmission rate is far higher than the existing transmission mode; finally, the modulated 5.8GHz high frequency signal is radiated to the vehicle passing area of the expressway and the urban road through the transmitting antenna 214, and after receiving the transmitted data, the vehicle-mounted device demodulates and decodes the data, restores the data into information such as voice characters, pictures, videos and the like, and transmits the information to the edge calculating unit 40 through the high-speed ethernet for further screening and processing.

In this embodiment, an ethernet control chip is disposed in the communication module 32, and the SPI communication bus is integrated with the ethernet control chip. The SPI is an abbreviation for Serial Peripheral Interface (Serial Peripheral Interface), and the SPI communication bus is a high-speed, full-duplex, synchronous communication bus, and occupies only four wires on the pins of the chip, saving the pins of the chip, and providing convenience for saving space on the layout of the PCB. This scheme adopts the ethernet control chip who has integrateed the SPI bus, has guaranteed promptly that data are at the inside transmission rate of wireless transceiver, has simplified wireless transceiver again.

In this embodiment, the second verification module 33 includes an MCU and a PSMA card, and the MCU is connected to the second core board 31 through an ethernet interface; the PSMA card is connected with the MCU and configured to encrypt and verify transaction data.

The wireless transceiver of the embodiment adopts a working mode that the indoor control unit 30 and the outdoor control unit 10 are dragged by one, the wireless transceiver of the mode is mainly applied to the scenes of the portal frame of the expressway and the entrance and exit of the toll station, for example, the outdoor control unit 10 is arranged in an outdoor setting area, and the indoor control unit 30 is arranged in a sentry box or a roadside control cabinet, so that the working stability of the wireless transceiver is improved.

The wireless transceiver of the embodiment has the advantages of high data transmission rate, large communication area and low time delay; when being applied to the ETC system, can satisfy the function of conventional ETC deduction and identification, can also satisfy under different use scenes to the harmless high-quality service data of quick transmission of OBU equipment, realize better user service.

The invention further provides an ETC system, which comprises the wireless transceiver device in the embodiment, and data are wirelessly transmitted at high speed with OBU equipment at a vehicle end in a monitoring area through the wireless transceiver device.

The ETC system provided by the implementation applies the wireless transceiving device in the embodiment, is applied to the ETC system, has high data transmission rate, large communication area and low time delay, can meet the functions of fee deduction and identity recognition of the conventional ETC system, can also meet the requirement of lossless and rapid transmission of high-quality picture, voice and video stream data to vehicle-mounted OBU equipment under expressway or urban scenes, and can better serve users.

Fig. 5 is a flowchart of a data wireless transmission method according to an embodiment of the present invention, which is applied to a downlink of the wireless transceiver. As shown in fig. 5, the method includes the following steps S110 to S140.

And S110, acquiring emission data.

In this embodiment, the wireless transceiver needs to acquire corresponding service data and instruction data first when sending data wirelessly, in this scheme, the service data may be cloud data from the edge computing unit, or may be local data prestored in the outdoor control unit, and the service data includes, but is not limited to, data converted from text, sound, pictures, videos, and the like. Compare in the instruction information that present ETC system can only transmit the small data volume, this scheme can launch the service data that the data volume is bigger.

In an embodiment, step S110 further includes step S111.

And S111, converting the service information into transmission data through the edge computing unit, and acquiring the transmission data from the edge computing unit through the Ethernet.

In this embodiment, the wireless transceiver is connected to the edge computing unit through the high-speed ethernet interface, when data transmission is needed, service data can be quickly acquired from the edge computing unit through ethernet connection for transmission, the transmission data acquisition rate is high, and meanwhile, the server as the transmission data has various data types, is not limited to instruction data of a small data volume, and can also be high-quality image, voice and video stream data of a larger data volume, and high-speed wireless data transmission is better realized to provide services for customers.

And S120, coding the transmitting data through a coding modulation module to obtain coded transmitting data.

S130, the coded transmitting data is subjected to GFSK modulation through a radio frequency transmitting module, so that a modulated transmitting signal modulated on a target channel is obtained.

And S140, radiating the modulated transmission signal to a target area through a transmission channel of the radio frequency transmission module to finish transmitting data.

In this embodiment, the code modulation module is used as a main control chip for coding and modulating the transmission channel, and the code modulation module can control the voltage-controlled oscillator to perform GFSK modulation and channel interval division on the transmission signal, or encode and decode the transmission and reception signal. When a Voltage Controlled Oscillator (VCO) is controlled to carry out GFSK modulation and channel interval division, the specific GFSK frequency offset is 1MHz, and the channel interval is 5 MHz. The modulated transmission signal modulated by the GFSK is modulated on a channel of 5.8GHz, the data rate reaches 4Mbit/s, and the data transmission rate is far higher than that of the existing transmission mode; and finally, the modulated 5.8GHz high-frequency signal is radiated to a vehicle passing area of an expressway and an urban road through a transmitting antenna, so that data issuing can be completed.

In this embodiment, the radio frequency architecture of the radio frequency transmitting module adopts a multi-channel frequency division full duplex mechanism, that is, a multi-transmission channel frequency division full duplex mechanism, the modulation mode adopts GFSK, and a data transmission rate of at least 4Mbps can be realized, and the radio frequency transceiver unit has the advantages of a long communication area, a high data transmission rate, high concurrency, low delay, and capability of satisfying simultaneous access of multiple users.

Specifically, the target area may be a specific city intersection, a toll station, a lane junction, and the like, and the area where the wireless transceiver and the OBU device need to perform wireless data transmission.

The data wireless transmission method of the embodiment obtains and encodes the service data with large data volume, then carries out GFSK modulation, and radiates the service data to a target area through a plurality of transmitting channels, so that the data wireless transmission method has the advantages of high speed, large communication area and low time delay; when being applied to the ETC system, can satisfy the function of conventional ETC deduction and identification, can also satisfy not haring the high-quality service data of quick transmission to OBU equipment under the different use scenes, realize better user service.

Fig. 6 is a flowchart illustrating a data wireless transmission method according to an embodiment of the invention, which is applied to an uplink of the wireless transceiver device. As shown in fig. 6, the method includes the following steps S210 to S230.

S210, receiving the uplink signals from the monitoring area through a plurality of receiving channels of the radio frequency receiving module.

In this embodiment, the rf receiving module is provided with a plurality of receiving channels, and can simultaneously receive uplink signals from different OBU devices, and further process the uplink signals and transmit the processed uplink signals to the wireless transceiver. Specifically, the radio frequency architecture of the radio frequency receiving module in the scheme adopts a multi-channel frequency division full duplex mechanism, namely a multi-receiving channel frequency division full duplex mechanism, the modulation and demodulation mode adopts GFSK (quadrature frequency shift keying), the data transmission rate of at least 4Mbps can be realized, and the radio frequency receiving and transmitting unit has the advantages of long communication area, high data transmission rate, high concurrency, low time delay and simultaneous access of multiple users. According to the scheme, uplink signals are received for the monitoring area through the plurality of receiving channels arranged in the radio frequency receiving module, the data transmission speed is high, the monitoring coverage range is long, and data transmission of vehicles in the monitoring area can be better achieved.

S220, demodulating the uplink signal through a radio frequency receiving module to obtain a demodulated received signal.

And S230, decoding the demodulated received signal through a coding modulation module to obtain received data, and finishing the uploading of the received data.

In this embodiment, different receiving channels (receiving channels 1-n) of the rf receiving module are responsible for receiving different uplink signals. An uplink signal received by a receiving antenna is amplified by a Low Noise Amplifier (LNA) and then enters a Mixer (MIX) for down-conversion, and the purpose of down-conversion is to reduce the carrier frequency of the signal or directly remove the carrier frequency to obtain a baseband signal. And (3) the signal after the down-conversion passes through a Low Pass Filter (LPF) to suppress a high-frequency modulation point of a GFSK modulation signal, so that the FSK modulation spectrum is converted into an ASK modulation spectrum, then the ASK modulation spectrum enters an envelope detector to perform envelope detection to output an analog envelope waveform of an original signal, and finally the ASK modulation spectrum enters a coding modulation module to perform demodulation and decoding to restore the original data and complete the reception of uplink signals/data.

For example, on-vehicle OBU equipment passes through the CAN bus with the vehicle and links to each other, and the vehicle controller converts the data message that the vehicle was gathered including text sound, picture, video that the information was reported into data, sends OBU equipment for through the CAN bus as required. The OBU equipment sends the data information to a wireless transceiver through a 5.8GHz high-frequency signal, and the data information is received by a receiving antenna and then transmitted to a receiving channel; and the receiving channel performs low-noise amplification on the received 5.8GHz high-frequency signal, demodulates the signal in the radio frequency chip and transmits the demodulated signal to the coding modulation module for decoding. The data decoded by the code modulation module is transmitted to the first core board through the GPMC bus,

in one embodiment, step S230 includes step S231.

And S231, sending the received data to an edge computing unit through the Ethernet, and carrying out data processing on the received data through the edge computing unit.

In this embodiment, after receiving the large amount of received data uploaded by the on-board OBU device, the indoor control unit and the outdoor control unit further send the data sub-packets to the edge computing unit through the high-speed ethernet, which ensures efficient data transmission. In the edge computing unit, the received data can be subjected to data summarization, display and validity screening so as to better provide the I2V service for the vehicle.

The data wireless transmission method of the embodiment receives the uplink signals in the monitoring area through a plurality of receiving channels, demodulates and decodes the uplink signals to obtain original receiving data, and has the advantages of high speed, large communication area and low time delay; when being applied to the ETC system, can satisfy the function of conventional ETC deduction and identification, can also satisfy not haring the high-quality service data of quick transmission to OBU equipment under the different use scenes, realize better user service.

While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A wireless transceiver device is characterized by comprising an outdoor control unit and a radio frequency transceiver unit;

the outdoor control unit comprises a first core board, a first verification module and a coding modulation module; the first verification module is connected with the first core board and configured to encrypt and verify transaction information; the coding modulation module is connected with the first core board and is configured to code and decode the transceiving signals and modulate the signals; the first core board is configured to process data from the first verification module and the code modulation module, or perform data communication with an edge computing unit;

the radio frequency transceiving unit comprises a radio frequency transmitting module and a radio frequency receiving module which are connected with the code modulation module; the radio frequency transmitting module is provided with a plurality of transmitting channels and is configured to radiate transmitting signals to a target area; the radio frequency receiving module is provided with a plurality of receiving channels, configured to receive uplink signals from a monitoring area, and transmitted to the code modulation module.

2. The wireless transceiver device of claim 1, further comprising an indoor control unit, the indoor control unit comprising a second core board, a communication module, and a second verification module; the communication module connects the second core board with the edge computing unit, and the second core board and the edge computing unit perform data communication through the communication module; the second verification module is connected with the second core board and configured to encrypt and verify transaction information; the second core board is connected to the first core board and configured to transmit service data from the edge computing unit to the first core board or receive reception data transmitted from the outdoor control unit.

3. The wireless transceiver of claim 1, wherein the transmit channel comprises a voltage controlled oscillator, a band pass filter, a power amplifier, and a transmit antenna; the input end of the voltage-controlled oscillator is connected with the code modulation module, the output end of the voltage-controlled oscillator is connected with the input end of the band-pass filter, the output end of the band-pass filter is connected with the input end of the power amplifier, the output end of the power amplifier is connected with the transmitting antenna, and a transmitting signal is radiated to a target area through the transmitting antenna.

4. The wireless transceiver of claim 1, wherein the receive channel comprises a low noise amplifier, a mixer, a low pass filter, an envelope detector, and a receive antenna; the output end of the envelope detector is connected with the coding modulation module, the input end of the envelope detector is connected with the output end of the low-pass filter, the input end of the low-pass filter is connected with the output end of the frequency mixer, the input end of the frequency mixer is connected with the output end of the low-noise amplifier, the input end of the low-noise amplifier is connected with the receiving antenna, and the receiving antenna receives uplink signals from a monitoring area.

5. The wireless transceiver of claim 2, wherein the second core board is connected to the first core board via an ethernet interface; the second core board is connected with the edge computing unit through an Ethernet interface.

6. An ETC system comprising the wireless transmission/reception device according to any one of claims 1 to 5.

7. A data wireless transmission method applied to the downlink of the wireless transceiver apparatus according to any one of claims 1 to 5, comprising the steps of:

acquiring emission data;

coding the transmitting data through a coding modulation module to obtain coded transmitting data;

carrying out GFSK modulation on the coded transmitting data through a radio frequency transmitting module to obtain a modulated transmitting signal modulated on a target channel;

and the modulated transmission signal is radiated to a target area through a transmission channel of a radio frequency transmission module to finish transmitting data.

8. The method for wireless data transmission according to claim 7, wherein the step of obtaining the transmission data comprises;

the service information is converted into transmission data through the edge computing unit, and the transmission data is obtained from the edge computing unit through the Ethernet.

9. A method for wireless transmission of data, applied to the uplink of the radio transceiver device according to any one of claims 1-5, comprising the steps of:

receiving uplink signals from a monitoring area through a plurality of receiving channels of a radio frequency receiving module;

demodulating the uplink signal through a radio frequency receiving module to obtain a demodulated received signal;

and decoding the demodulated received signal through a coding modulation module to obtain received data, and finishing the uploading of the received data.

10. The method of claim 9, wherein the step of decoding the demodulated received signal by the code modulation module to obtain received data and completing uploading the received data comprises;

and sending the received data to an edge computing unit through Ethernet, and carrying out data processing on the received data through the edge computing unit.

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