Vehicle-mounted multi-mode multi-frequency relay amplification system and method

Abstract

The invention provides a vehicle-mounted multi-mode multi-frequency relay amplification system and method, and relates to the technical field of mobile communication. According to the system, a GPS unit and a synchronization unit are connected with a 4G channel and a 5G channel, a control unit is connected with a communication unit, the communication unit is connected with the 4G channel and the 5G channel, a first combiner is connected with an intelligent return antenna, and a second combiner is connected with an intelligent retransmission antenna. The system can be installed at the top of a carriage of a bus, a tramcar and other vehicles, the antenna wave beam of the relay amplification system can be adjusted in real time according to a scanning result when the vehicle runs through GPS / BD positioning track and initialization of the scanning result, wireless signal 4 / 5G coverage can be provided for the surrounding environment outside the vehicle, 4 / 5G service can be provided for passengers in the vehicle, and the system is suitable for popularization and application. And even unmanned driving of the bus can be realized. According to the invention, the purpose of fully utilizing a large number of vehicles in a city as site resources is achieved. According to the invention, the problems of difficulty in base station site selection and overhigh base station deployment cost in the prior art are solved.

Description

Technical Field

[0001] The present invention relates to the field of mobile communication technology, and in particular to a vehicle-mounted multi-mode and multi-frequency relay amplification system and method. Background Art

[0002] With the continuous development of mobile communications, my country has built the largest number of 4G and 5G base stations in the world. In particular, 5G base stations have high frequency, wide bandwidth and low spectrum density. In order to meet the requirements of network coverage and capacity, more and more dense base stations need to be deployed. However, the problem is that the site resources in cities are limited, the site selection of base stations is becoming more and more difficult, and the site rental cost is becoming more and more expensive. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a vehicle-mounted multi-mode and multi-frequency relay amplification system and method, which solves the problems of difficulty in base station site selection and high cost of deploying base stations in the prior art.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] A vehicle-mounted multi-mode multi-frequency relay amplification system, comprising:

[0006] A power supply unit and a smart retransmission antenna, a 4G channel, a 5G channel, a smart backhaul antenna, a control unit, a communication unit, a GPS unit, a synchronization unit, a first combiner, and a second combiner, all of which are connected to the power supply unit;

[0007] The GPS unit and the synchronization unit are both connected to the 4G channel and the 5G channel, the control unit is connected to the communication unit, the communication unit is connected to the 4G channel and the 5G channel, the first combiner is connected to the smart backhaul antenna, and the second combiner is connected to the smart retransmission antenna;

[0008] The power supply unit is used to supply power to the smart retransmission antenna, the 4G channel, the 5G channel, the smart backhaul antenna, the control unit, the communication unit, the GPS unit and the synchronization unit. The GPS unit is used to obtain the geographic location information of the vehicle in real time. The synchronization unit is used to obtain the synchronization information of the 4G channel and the 5G channel. The 4G channel is used to transmit the 4G signal and generate a first control signal according to the geographic location information and the synchronization information. The 5G channel is used to transmit the 5G signal and generate a second control signal according to the geographic location information and the synchronization information. The communication unit is used to transmit the first control signal and the second control information to the control unit. The control unit is used to generate a first control instruction and a second control instruction according to the first control signal and the second control signal, the smart backhaul antenna is used to adjust the beam direction according to the first control instruction to receive and send the base station signal, and the smart retransmission antenna is used to adjust the beam direction according to the second control instruction to use the base station signal for signal coverage and receive the UE signal for backhaul to the smart backhaul antenna, wherein the UE signal and the base station signal include: 4G signal and 5G signal, and the first combiner and the second combiner are used to split or synthesize the UE signal and the base station signal into 4G signals and 5G signals.

[0009] Preferably, the 5G channel includes:

[0010] A first switch, a second switch, a first duplexer, a second duplexer, a first receiving module, a first TRX1 module, a first FPGA module, a second TRX1 module, a first transmitting module, a second receiving module, and a second transmitting module;

[0011] The first switch is connected to the first duplexer, the first duplexer is connected to the first receiving module, the first TRX1 module, the first FPGA module, the second TRX1 module, the first transmitting module, the second duplexer and the second switch in sequence, and the second duplexer is connected to the second receiving module, the second TRX1 module, the first FPGA module, the first TRX1 module, the second transmitting module and the first duplexer in sequence;

[0012] The first receiving module is used to filter and perform low-noise amplification processing on the 5G signal output by the smart backhaul antenna to obtain a first amplified signal. The first TRX1 module is used to amplify, frequency-convert, filter and AD process the first amplified signal in sequence to obtain a first AD signal. The first FPGA module is used to perform digital filtering and demodulation on the first AD signal to obtain a first digital signal and generate a second control signal according to the geographic location information and the synchronization information. The first transmitting module is used to perform DA conversion, frequency-converting filtering, amplifying and outputting on the first digital signal in sequence to obtain a first output signal. The second receiving module is used to receive the 5G signal of the smart retransmission antenna and perform low-noise amplification, filtering and amplification processing in sequence to obtain a second amplified signal. The second TRX1 module is also used to down-convert and AD-convert the second amplified signal to obtain a second AD signal. The first FPGA module is also used to perform digital domain processing on the second AD signal to obtain a second digital signal. The first TRX1 module is also used to perform DA conversion processing on the second digital signal to obtain a second DA signal. The second transmitting module is used to perform filtering and amplification processing on the second DA signal to obtain a second output signal.

[0013] Preferably, the 4G channel includes:

[0014] A third switch, a fourth switch, a third duplexer, a fourth duplexer, a third receiving module, a third TRX1 module, a second FPGA module, a fourth TRX1 module, a third transmitting module, a fourth receiving module, and a fourth transmitting module;

[0015] The third switch is connected to the third duplexer, the third duplexer is connected to the third receiving module, the third TRX1 module, the second FPGA module, the fourth TRX1 module, the second transmitting module, the fourth duplexer and the fourth switch in sequence, and the fourth duplexer is connected to the fourth receiving module, the fourth TRX1 module, the second FPGA module, the third TRX1 module, the fourth transmitting module and the third duplexer in sequence;

[0016] The third receiving module is used to filter and perform low-noise amplification processing on the 5G signal output by the smart backhaul antenna to obtain a third amplified signal. The third TRX1 module is used to amplify, frequency-convert, filter and AD process the third amplified signal in sequence to obtain a third AD signal. The second FPGA module is used to perform digital filtering and demodulation on the third AD signal to obtain a third digital signal and generate a first control signal according to the geographic location information and the synchronization information. The third transmitting module is used to perform DA conversion, frequency conversion filtering, amplification and output on the third digital signal in sequence to obtain a third output signal. The fourth receiving module is used to receive the 5G signal of the smart retransmission antenna and perform low-noise amplification, filtering and amplification processing in sequence to obtain a fourth amplified signal. The fourth TRX1 module is also used to down-convert and AD-convert the fourth amplified signal to obtain a fourth AD signal. The third FPGA module is also used to perform digital domain processing on the fourth AD signal to obtain a fourth digital signal. The third TRX1 module is also used to perform DA conversion processing on the fourth digital signal to obtain a fourth DA signal. The fourth transmitting module is used to perform filtering and amplification processing on the fourth DA signal to obtain a fourth output signal.

[0017] Preferably, the method comprises:

[0018] Using the smart retransmission antenna and the smart return antenna to perform signal scanning, obtain the signal scanning results and transmit them to the first FPGA module and the second FPGA module;

[0019] Using the GPS unit to obtain the real-time geographic location information of the vehicle and transmit it to the first FPGA module and the second FPGA module;

[0020] Acquire synchronization information using a synchronization unit and transmit the synchronization information to the first FPGA module and the second FPGA module;

[0021] Using the first FPGA module and the second FPGA module, algorithm processing is performed according to the geographic location information, synchronization information and signal scanning results of the vehicle to obtain a first control signal and a second control signal;

[0022] Using a control unit, generating a first control instruction and a second control instruction according to the first control signal and the second control signal;

[0023] The first control instruction and the second control instruction are used to adjust the beam pointing of the smart retransmission antenna and the smart backhaul antenna respectively.

[0024] The present invention discloses the following technical effects:

[0025] The present invention provides a vehicle-mounted multi-mode and multi-frequency relay amplification system, comprising: a power supply unit and an intelligent retransmission antenna, a 4G channel, a 5G channel, an intelligent backhaul antenna, a control unit, a communication unit, a GPS unit, a synchronization unit, a first combiner, and a second combiner, all of which are connected to the power supply unit; the GPS unit and the synchronization unit are both connected to the 4G channel and the 5G channel, the control unit is connected to the communication unit, the communication unit is connected to the 4G channel and the 5G channel, the first combiner is connected to the intelligent backhaul antenna, and the second combiner is connected to the intelligent retransmission antenna; the power supply unit is used to supply power to the intelligent retransmission antenna, the 4G channel, the 5G channel, the intelligent backhaul antenna, the control unit, the communication unit, the GPS unit, and the synchronization unit, the GPS unit is used to obtain the geographic location information of the vehicle in real time, the synchronization unit is used to obtain the synchronization information of the 4G channel and the 5G channel, the 4G channel is used to transmit 4G signals and transmit according to The geographic location information and the synchronization information generate a first control signal, the 5G channel is used to transmit the 5G signal and generate a second control signal according to the geographic location information and the synchronization information, the communication unit is used to transmit the first control signal and the second control information to the control unit, the control unit is used to generate a first control instruction and a second control instruction according to the first control signal and the second control signal, the smart backhaul antenna is used to adjust the beam direction according to the first control instruction to receive and send the base station signal, the smart retransmission antenna is used to adjust the beam direction according to the second control instruction to use the base station signal for signal coverage and receive the UE signal for backhaul to the smart backhaul antenna, wherein the UE signal and the base station signal include: 4G signal and 5G signal, the first combiner and the second combiner are used to split or synthesize the UE signal and the base station signal into 4G signal and 5G signal. The present invention can not only provide wireless signal 4 / 5G coverage to the surrounding environment outside the vehicle, but also provide 4 / 5G services to passengers in the vehicle by installing a 4 / 5G relay station on the vehicle and adjusting the antenna beam of the relay amplification system in real time through GPS / BD positioning trajectory. Therefore, the present invention realizes the expansion of wireless signal coverage by deploying a 4 / 5G multi-mode multi-frequency relay amplification system on vehicles, so as to make full use of a large number of vehicles in the city as "site resources". The 4 / 5G relay station uses the 4 / 5G macro base station as the donor base station and connects to the macro base station through wireless backhaul, without the need to deploy optical fiber, and has strong deployment flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 A schematic diagram of the structure of a vehicle-mounted multi-mode and multi-frequency relay amplification system provided by an embodiment of the present invention;

[0028] Figure 2 A detailed schematic diagram of a vehicle-mounted multi-mode and multi-frequency relay amplification system provided by an embodiment of the present invention;

[0029] Figure 3 A flowchart of work initialization provided for an embodiment of the present invention;

[0030] Figure 4 A schematic diagram of a synchronization unit flow chart provided in an embodiment of the present invention.

[0031] Description of reference numerals:

[0032] 1-intelligent backhaul antenna, 2-first combiner, 3-5G channel, 4-4G channel, 5-second combiner, 6-intelligent retransmission antenna, 7-communication unit, 8-control unit, 9-GPS unit, 10-synchronization unit, 11-power supply unit. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] like Figure 1 As shown, the present invention provides a vehicle-mounted multi-mode multi-frequency relay amplification system, comprising:

[0036] A power supply unit 11 and a smart retransmission antenna 6, a 4G channel 4, a 5G channel 3, a smart backhaul antenna 1, a control unit 8, a communication unit 7, a GPS unit 9, a synchronization unit 10, a first combiner 2, and a second combiner 5, all of which are connected to the power supply unit 11;

[0037] The GPS unit 9 and the synchronization unit 10 are both connected to the 4G channel 4 and the 5G channel 3, the control unit 8 is connected to the communication unit 7, the communication unit 7 is connected to the 4G channel 4 and the 5G channel 3, the first combiner 2 is connected to the smart backhaul antenna 1, and the second combiner 5 is connected to the smart retransmission antenna 6;

[0038] The power supply unit 11 is used to supply power to the smart retransmission antenna 6, the 4G channel 4, the 5G channel 3, the smart backhaul antenna 1, the control unit 8, the communication unit 7, the GPS unit 9 and the synchronization unit 10. The GPS unit 9 is used to obtain the geographic location information of the vehicle in real time. The synchronization unit 10 is used to obtain the synchronization information of the 4G channel 4 and the 5G channel 3. The 4G channel 4 is used to transmit a 4G signal and generate a first control signal according to the geographic location information and the synchronization information. The 5G channel 3 is used to transmit a 5G signal and generate a second control signal according to the geographic location information and the synchronization information. The communication unit 7 is used to transmit the first control signal and the second control information to The control unit 8 is used to generate a first control instruction and a second control instruction according to the first control signal and the second control signal, the smart backhaul antenna 1 is used to adjust the beam direction according to the first control instruction to receive and send the base station signal, and the smart retransmission antenna 6 is used to adjust the beam direction according to the second control instruction to use the base station signal for signal coverage and receive the UE signal for backhaul to the smart backhaul antenna 1, wherein the UE signal and the base station signal include: 4G signal and 5G signal, and the first combiner 2 and the second combiner 5 are used to split or synthesize the UE signal and the base station signal into 4G signals and 5G signals.

[0039] Specifically, GPS / BD unit: This unit can obtain the geographic location information of the vehicle in real time, providing a basis for subsequent beam adjustment. The backend server remotely monitors the working status of the relay amplifier in real time, such as working status or shutdown status, etc. Communication unit 7: Provides connection and communication functions for the vehicle-mounted relay amplifier system and the backend server; Control unit 8: Receives the control command provided by the FPGA processing unit, and passes the command to the smart backhaul antenna 1, the smart retransmission antenna 6 and other parts; Power supply unit 11: Provides power for the entire vehicle-mounted relay amplifier system; Smart backhaul antenna 1: Receives the control instruction sent by the control unit 8, and adjusts the beam pointing of the backhaul antenna 1 in real time to ensure that the best macro station signal can be received; 4 / 5GFPGA: According to the geographic location data provided by the GPS / BD unit and the data collected by the 4 / 5G synchronization unit 10, generates real-time control information according to the corresponding algorithm and the set threshold, and sends it to the control unit 8; Smart retransmission antenna 6: Receives the control instruction sent by the control unit 8, and adjusts the beam pointing of the retransmission antenna in real time to ensure coverage.

[0040] like Figure 2 As shown, the intelligent backhaul antenna 1 is a broadband multi-beam high-gain antenna that can switch beams to select the optimal macro station wireless signal; the intelligent retransmission antenna 6 is a broadband multi-beam antenna that can retransmit the relay amplified RF signal; the 4G RF channel and the 5G RF channel share two combiners (the first combiner 2 and the second combiner 5) to achieve the branching and synthesis of 4G and 5G signals; the 5G switch / duplexer (the first switch, the second switch, the first duplexer and the second duplexer) realizes signal branching or synthesis; the 5G receiving module_D (the first receiving module) realizes macro station signal filtering and low-noise amplification; 5G_TRX1 (first TRX1 module) amplifies, frequency-converts, filters, and performs AD processing on the RF signal after low-noise amplification; 5G_FPGA (first FPGA module) performs digital filtering and demodulation on the digital signal output by TRX; 5G_TRX2 (second TRX2 module) performs DA conversion on the signal processed by FPGA, frequency-converts, filters, amplifies, and outputs it; 5G transmitting module_D (first transmitting module) filters and amplifies the RF signal and sends it to the 4 / 5G combiner (second combiner 5), and finally passes through the intelligent retransmission antenna 6 to achieve 5G coverage in weak signal areas.

[0041] Furthermore, the 5G channel 3 includes:

[0042] A first switch, a second switch, a first duplexer, a second duplexer, a first receiving module, a first TRX1 module, a first FPGA module, a second TRX1 module, a first transmitting module, a second receiving module, and a second transmitting module;

[0043] Specifically, the switch is used in 4G or 5G systems in TDD mode, and the duplexer is used in 4G or 5G systems in FDD mode. In normal applications, TDD and FDD are in an OR relationship, that is, the TDD system uses the switch and the FDD system uses the duplexer.

[0044] The first switch is connected to the first duplexer, the first duplexer is connected to the first receiving module, the first TRX1 module, the first FPGA module, the second TRX1 module, the first transmitting module, the second duplexer and the second switch in sequence, and the second duplexer is connected to the second receiving module, the second TRX1 module, the first FPGA module, the first TRX1 module, the second transmitting module and the first duplexer in sequence;

[0045] The first receiving module is used to filter and perform low-noise amplification processing on the 5G signal output by the smart backhaul antenna 1 to obtain a first amplified signal. The first TRX1 module is used to amplify, frequency-convert, filter and AD process the first amplified signal in sequence to obtain a first AD signal. The first FPGA module is used to perform digital filtering and demodulation on the first AD signal to obtain a first digital signal and generate a second control signal according to the geographic location information and the synchronization information. The first transmitting module is used to perform DA conversion, frequency-converting filtering, amplifying and outputting on the first digital signal in sequence to obtain a first output signal. The second receiving module is used to receive the 5G signal of the smart retransmission antenna 6 and perform low-noise amplification, filtering and amplification processing in sequence to obtain a second amplified signal. The second TRX1 module is also used to down-convert and AD-convert the second amplified signal to obtain a second AD signal. The first FPGA module is also used to perform digital domain processing on the second AD signal to obtain a second digital signal. The first TRX1 module is also used to perform DA conversion processing on the second digital signal to obtain a second DA signal. The second transmitting module is used to perform filtering and amplification processing on the second DA signal to obtain a second output signal.

[0046] Specifically, the retransmission antenna receives the UE 5G signal in the coverage area, performs low-noise filtering and amplification through the 5G receiving module_U (the second receiving module), then performs down-conversion and AD conversion through 5G_TRX2, performs digital domain processing through 5G_FPGA, and implements DA conversion and up-conversion into RF signals through 5G_TRX1, which is filtered and amplified by the 5G transmitting module_U (the second transmitting module) and then sent to the macro station through the backhaul antenna 1.

[0047] Furthermore, the 4G channel 4 includes:

[0048] A third switch, a fourth switch, a third duplexer, a fourth duplexer, a third receiving module, a third TRX1 module, a second FPGA module, a fourth TRX1 module, a third transmitting module, a fourth receiving module, and a fourth transmitting module;

[0049] The third switch is connected to the third duplexer, the third duplexer is connected to the third receiving module, the third TRX1 module, the second FPGA module, the fourth TRX1 module, the second transmitting module, the fourth duplexer and the fourth switch in sequence, and the fourth duplexer is connected to the fourth receiving module, the fourth TRX1 module, the second FPGA module, the third TRX1 module, the fourth transmitting module and the third duplexer in sequence;

[0050] The third receiving module is used to filter and perform low-noise amplification processing on the 5G signal output by the smart backhaul antenna 1 to obtain a third amplified signal. The third TRX1 module is used to amplify, frequency-convert, filter and AD process the third amplified signal in sequence to obtain a third AD signal. The second FPGA module is used to perform digital filtering and demodulation on the third AD signal to obtain a third digital signal and generate a first control signal according to the geographic location information and the synchronization information. The third transmitting module is used to perform DA conversion, frequency conversion filtering, amplification and output on the third digital signal in sequence to obtain a third output signal. The fourth receiving module is used to receive the 5G signal of the smart retransmission antenna 6 and perform low-noise amplification, filtering and amplification processing in sequence to obtain a fourth amplified signal. The fourth TRX1 module is also used to down-convert and AD-convert the fourth amplified signal to obtain a fourth AD signal. The third FPGA module is also used to perform digital domain processing on the fourth AD signal to obtain a fourth digital signal. The third TRX1 module is also used to perform DA conversion processing on the fourth digital signal to obtain a fourth DA signal. The fourth transmitting module is used to perform filtering and amplification processing on the fourth DA signal to obtain a fourth output signal.

[0051] Specifically, the 4G switch / duplexer realizes signal splitting or synthesis; the 4G receiving module_D realizes macro station signal filtering and low-noise amplification; 4G_TRX1 amplifies the RF signal after low-noise amplification, performs frequency conversion filtering and AD processing, etc.; 4G_FPGA performs digital filtering and demodulation on the digital signal output by TRX, etc.; 4G_TRX2 performs DA conversion on the signal processed by FPGA, and then performs frequency conversion filtering, amplification and output; the 4G transmitting module_D filters and amplifies the RF signal and sends it to the 4 / 5G combiner, and finally passes through the intelligent retransmission antenna 6 to achieve 4G coverage in weak signal areas.

[0052] The retransmission antenna receives the UE 4G signal in the coverage area, performs low noise filtering and amplification through the 4G receiving module_U, then performs down-conversion and AD conversion through 4G_TRX2, performs digital domain processing through 4G_FPGA, and realizes DA conversion and up-conversion into RF signal by 4G_TRX1, which is filtered and amplified by the 4G transmitting module_U and sent to the macro base station through the backhaul antenna 1.

[0053] Specifically, Figure 3 As shown, the workflow of the present invention is as follows:

[0054] During the first operation of the vehicle, the intelligent backhaul antenna 1 omnidirectionally scans the 4 / 5G signal of the macro station on the vehicle's running track, and sends it to the 4 / 5G synchronization unit 10 after amplification through the main channel downlink, and analyzes the signal strength and signal quality, and sends it to the processing unit in real time; the purpose is to ensure that when the vehicle is in different geographical locations, different beam directions are selected to ensure real-time selection of the optimal macro station 4 / 5G signal. During the first operation of the vehicle, the intelligent retransmission antenna 6 omnidirectionally scans the 4 / 5G signal in the coverage area on the vehicle's running track, and sends it to the 4 / 5G synchronization unit 10 after amplification through the main channel uplink, and analyzes the signal strength and signal quality, and sends it to the processing unit in real time; the purpose is to ensure that when the vehicle is in different geographical locations, the area that needs to be covered is selected for good coverage. The GPS / BD unit provides real-time geographical location information when the vehicle is running, and sends it to the processing unit in real time.

[0055] The processing unit will obtain the real-time geographic location information provided by the GPS / BD unit, and the 4 / 5G signal data collected by the smart backhaul antenna 1 and the smart retransmission antenna 6, and save them in real time. The processing unit generates a series of control information instructions according to the designed algorithm and universal parameter threshold, and transmits them to the control unit 8; the control unit 8 controls and selects the channel, the beam of the smart backhaul antenna 1, and the beam of the smart retransmission antenna 6. This ensures that during the operation of the vehicle, the smart backhaul antenna 1 can select the optimal macro station signal in real time, and after the control device channel performs active filtering and amplification, the smart retransmission antenna 6 selects the area that needs to be covered most in real time and performs the best coverage.

[0056] This embodiment also provides a vehicle-mounted multi-mode multi-frequency relay amplification method, the method comprising:

[0057] Using the smart retransmission antenna 6 and the smart return antenna 1 to perform signal scanning, obtain the signal scanning results and transmit them to the first FPGA module and the second FPGA module;

[0058] Using the GPS unit 9 to obtain the real-time geographic location information of the vehicle and transmit it to the first FPGA module and the second FPGA module;

[0059] Using the synchronization unit 10 to acquire synchronization information and transmit it to the first FPGA module and the second FPGA module;

[0060] Using the first FPGA module and the second FPGA module, according to the geographic location information and synchronization unit signal information of the vehicle, the received real-time geographic location information, real-time synchronization signal data, and retransmission antenna control information are analyzed and synthesized to generate a data table, and the FPGA compares according to a preset signal quality threshold, selects the optimal signal from the data table, generates the required data table, performs algorithm processing, and obtains the first control signal and the second control signal;

[0061] Using the control unit 8, generating a first control instruction and a second control instruction according to the first control signal and the second control signal;

[0062] The first control instruction and the second control instruction are used to adjust the beam pointing of the smart retransmission antenna 6 and the smart backhaul antenna 1 respectively.

[0063] Specifically, in step 1, when the vehicle is running for the first time, the on-board relay amplifier system performs real-time signal scanning and saves the scanning results through the control unit 8, mainly including the full-range scanning of the macro station 4 / 5G signal received by the backhaul antenna 1 and the saving of the scanning results; the scanning results are processed by the FPGA unit;

[0064] Step 2: The GPS / BD unit performs real-time positioning and storage when the vehicle is running for the first time, and sends the data to the FPGA processing unit in real time.

[0065] Step 3: FPGA processes the location information and collected signals stored by the GPS / BD unit and the return antenna 1 through an algorithm, and sends the processing results to the control unit 8. The control unit 8 controls the channel shutoff of the vehicle-mounted relay amplifier system and the beam pointing of the return antenna 1 during the operation of the vehicle according to the information;

[0066] like Figure 4 As shown, the 4 / 5G synchronization unit 10 mainly realizes the collection of 4 / 5G signal strength and signal quality of the macro station, and its algorithm is as follows:

[0067] Step 1: PSS synchronization. PSS uses M sequence modulation, the carrier position is fixed (127 subcarriers, the existing network frequency is fixed), and the initial value of the M sequence is related to the cell ID, that is, There are three possibilities, and the receiving end needs to traverse and search for the three possible situations.

[0068] Step 2: SSS synchronization. After completing PPS synchronization, the system completes the initial positioning of the SSB time slot. There is a time slot between SSS and PSS, so the time slot where SSS is located can be obtained through PSS. SSS uses M sequence modulation in the frequency domain, which is composed of There are 336 possible choices. Since there are many types of SSS, we perform FFT transformation on the SSS time slots in the time domain and transfer them to the frequency domain for correlation to find the best solution.

[0069] 1) According to and You can get the cell ID.

[0070] 2) DMRS information solution. DMRS and PBCH are spaced, with one DMRS for every 4 subcarriers. The DMRS location is determined by the cell ID. The DMRS information is taken out according to the cell ID. The information length is 144 subcarriers, which occupy 60 subcarriers in time slots 1 and 3, and 12 subcarriers in time slot 2 except SSS. The DMRS signal is determined by the offset of SSB, and there are 8 possibilities. After splicing the DMRS information, 8 different DMRS sequences and splicing sequences are used to correlate and solve to get the SSB offset i ssb , thus obtaining the frame start position.

[0071] The main functions of the TRX and FPGA units include up and down conversion, AD / DA conversion, signal processing, communication and other functions. The FPGA working method includes the following steps:

[0072] In the first step, FPGA converts the analog signal into AD, and the AD converter performs real-time data acquisition;

[0073] In the second step, the collected data is processed inside the FPGA and I / Q separation is completed at the same time;

[0074] In the third step, the data after I / Q separation is stored in the first-level cache. When the first-level cache is full of data, the backend is notified to perform I and Q filtering;

[0075] The fourth step is to store the filtered data in the second-level cache. After all the data are filtered, the adaptive algorithm is used to calculate the data weight value.

[0076] The fifth step is to perform real-time weighted output of the weighted value and the real-time collected data, and the output data is converted into an analog signal through a D / A converter;

[0077] In the sixth step, the analog signal is restored to the original signal through the up-conversion module.

[0078] The intelligent return antenna 1 and the retransmission antenna scanning base FPGA processing method include:

[0079] Step 1: The smart backhaul antenna 1 automatically and omnidirectionally scans the macro station 4 / 5G signals on the vehicle's running track. The on-board relay amplification system is initially set to the downlink long-transmission state to amplify the 4 / 5G signals scanned by the smart backhaul antenna 1.

[0080] Step 2: The 4 / 5G synchronization unit 10 receives the amplified 4 / 5G outdoor macro base station signal, synchronously determines the received signal strength and quality, saves the real-time results, and sends them to the FPGA processing unit. The real-time results include the antenna beam pointing and the signal strength and signal quality corresponding to the beam pointing;

[0081] Step 3: The intelligent retransmission antenna 6 of the vehicle-mounted relay amplification system automatically scans the macro base station signal in the coverage area, and the vehicle-mounted relay amplification system sets the uplink part to a long transmission state, amplifies the 4 / 5G signal received by the retransmission antenna, and sends it to the 4 / 5G synchronization unit 10;

[0082] Step 4: The 4 / 5G synchronization unit 10 receives the 4 / 5G signal, determines the strength and quality of the received signal by synchronization, and saves the real-time result, which includes the antenna beam pointing and the signal strength and signal quality corresponding to the beam pointing;

[0083] Step 5: The GPS / BD unit records and saves the vehicle's geographic location information in real time according to the vehicle's running trajectory and sends it to the processing unit;

[0084] Step 6: The processing unit forms a table of location information, backhaul antenna 1 beam, and 4 / 5G channel data according to the signal strength and quality and corresponding beam pointing and location information according to the designed algorithm based on the set signal strength and signal quality threshold, and sends the control information to the control unit 8, which controls the backhaul antenna 1 accordingly to ensure that the vehicle can select the best macro station signal and cover the weakest area in real time when running.

[0085] Step 7: When the vehicle is run for the first time, all data information is saved. When the vehicle is run subsequently, the data information saved in the first run is automatically matched with the data information table saved in the first run and the current geographical location of the vehicle, and the corresponding control command is selected to realize relay amplification and control during vehicle operation.

[0086] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0087] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A vehicle-mounted multi-mode multi-frequency relay amplification system, characterized in that: include: A power supply unit and a smart retransmission antenna, a 4G channel, a 5G channel, a smart backhaul antenna, a control unit, a communication unit, a GPS unit, a synchronization unit, a first combiner, and a second combiner, all of which are connected to the power supply unit; The GPS unit and the synchronization unit are both connected to the 4G channel and the 5G channel, the control unit is connected to the communication unit, the communication unit is connected to the 4G channel and the 5G channel, the first combiner is connected to the smart backhaul antenna, and the second combiner is connected to the smart retransmission antenna; The power supply unit is used to supply power to the smart retransmission antenna, the 4G channel, the 5G channel, the smart backhaul antenna, the control unit, the communication unit, the GPS unit and the synchronization unit. The GPS unit is used to obtain the geographic location information of the vehicle in real time. The synchronization unit is used to obtain the synchronization information of the 4G channel and the 5G channel. The 4G channel is used to transmit the 4G signal and generate a first control signal according to the geographic location information and the synchronization information. The 5G channel is used to transmit the 5G signal and generate a second control signal according to the geographic location information and the synchronization information. The communication unit is used to transmit the first control signal and the second control information to the control unit. The control unit is used to generate a first control instruction and a second control instruction according to the first control signal and the second control signal, the smart backhaul antenna is used to adjust the beam direction according to the first control instruction to receive and send the base station signal, and the smart retransmission antenna is used to adjust the beam direction according to the second control instruction to use the base station signal for signal coverage and receive the UE signal for backhaul to the smart backhaul antenna, wherein the UE signal and the base station signal include: 4G signal and 5G signal, and the first combiner and the second combiner are used to split or synthesize the UE signal and the base station signal into 4G signals and 5G signals.

2. The vehicle-mounted multi-mode multi-frequency relay amplification system according to claim 1, characterized in that: The 5G channel includes: A first switch, a second switch, a first duplexer, a second duplexer, a first receiving module, a first TRX1 module, a first FPGA module, a second TRX1 module, a first transmitting module, a second receiving module, and a second transmitting module; The first switch is connected to the first duplexer, the first duplexer is connected to the first receiving module, the first TRX1 module, the first FPGA module, the second TRX1 module, the first transmitting module, the second duplexer and the second switch in sequence, and the second duplexer is connected to the second receiving module, the second TRX1 module, the first FPGA module, the first TRX1 module, the second transmitting module and the first duplexer in sequence; The first receiving module is used to filter and perform low-noise amplification processing on the 5G signal output by the smart backhaul antenna to obtain a first amplified signal. The first TRX1 module is used to amplify, frequency-convert, filter and AD process the first amplified signal in sequence to obtain a first AD signal. The first FPGA module is used to perform digital filtering and demodulation on the first AD signal to obtain a first digital signal and generate a second control signal according to the geographic location information and the synchronization information. The first transmitting module is used to perform DA conversion, frequency-converting filtering, amplifying and outputting on the first digital signal in sequence to obtain a first output signal. The second receiving module is used to receive the 5G signal of the smart retransmission antenna and perform low-noise amplification, filtering and amplification processing in sequence to obtain a second amplified signal. The second TRX1 module is also used to down-convert and AD-convert the second amplified signal to obtain a second AD signal. The first FPGA module is also used to perform digital domain processing on the second AD signal to obtain a second digital signal. The first TRX1 module is also used to perform DA conversion processing on the second digital signal to obtain a second DA signal. The second transmitting module is used to perform filtering and amplification processing on the second DA signal to obtain a second output signal.

3. The vehicle-mounted multi-mode multi-frequency relay amplification system according to claim 1, characterized in that: The 4G channel includes: A third switch, a fourth switch, a third duplexer, a fourth duplexer, a third receiving module, a third TRX1 module, a second FPGA module, a fourth TRX1 module, a third transmitting module, a fourth receiving module, and a fourth transmitting module; The third switch is connected to the third duplexer, the third duplexer is connected to the third receiving module, the third TRX1 module, the second FPGA module, the fourth TRX1 module, the second transmitting module, the fourth duplexer and the fourth switch in sequence, and the fourth duplexer is connected to the fourth receiving module, the fourth TRX1 module, the second FPGA module, the third TRX1 module, the fourth transmitting module and the third duplexer in sequence; The third receiving module is used to filter and perform low-noise amplification processing on the 5G signal output by the smart backhaul antenna to obtain a third amplified signal. The third TRX1 module is used to amplify, frequency-convert, filter and AD process the third amplified signal in sequence to obtain a third AD signal. The second FPGA module is used to perform digital filtering and demodulation on the third AD signal to obtain a third digital signal and generate a first control signal according to the geographic location information and the synchronization information. The third transmitting module is used to perform DA conversion, frequency conversion filtering, amplification and output on the third digital signal in sequence to obtain a third output signal. The fourth receiving module is used to receive the 5G signal of the smart retransmission antenna and perform low-noise amplification, filtering and amplification processing in sequence to obtain a fourth amplified signal. The fourth TRX1 module is also used to down-convert and AD-convert the fourth amplified signal to obtain a fourth AD signal. The third FPGA module is also used to perform digital domain processing on the fourth AD signal to obtain a fourth digital signal. The third TRX1 module is also used to perform DA conversion processing on the fourth digital signal to obtain a fourth DA signal. The fourth transmitting module is used to perform filtering and amplification processing on the fourth DA signal to obtain a fourth output signal.

4. A vehicle-mounted multi-mode multi-frequency relay amplification method, applied to the system according to any one of claims 1 to 3, characterized in that: The method comprises: Using the smart retransmission antenna and the smart return antenna to perform signal scanning, obtain the signal scanning results and transmit them to the first FPGA module and the second FPGA module; Using the GPS unit to obtain the real-time geographic location information of the vehicle and transmit it to the first FPGA module and the second FPGA module; Acquire synchronization information using a synchronization unit and transmit the synchronization information to the first FPGA module and the second FPGA module; Using the first FPGA module and the second FPGA module, algorithm processing is performed according to the geographic location information, synchronization information and signal scanning results of the vehicle to obtain a first control signal and a second control signal; Using a control unit, generating a first control instruction and a second control instruction according to the first control signal and the second control signal; The first control instruction and the second control instruction are used to adjust the beam pointing of the smart retransmission antenna and the smart backhaul antenna respectively.

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