A communication method, system and storage medium

Abstract

The application relates to a communication method, a system and a storage medium, the method is applied to a base station corresponding to a first frequency band, and comprises the following steps: acquiring a first downlink signal corresponding to the first frequency band and a timing control signal corresponding to the first frequency band; the timing control signal is used for controlling the transmission timing of the first downlink signal; performing frequency conversion processing on the first downlink signal to obtain a second downlink signal corresponding to a second frequency band; the second frequency band is different from the first frequency band; performing power amplification processing on the second downlink signal based on the timing control signal to obtain a first transmission signal; and transmitting the first transmission signal to a first terminal. In the frequency conversion scene, the transmission timing of the frequency-converted downlink signal is controlled by multiplexing the original timing control signal of the base station, the accurate synchronization between the timing of the frequency-converted downlink signal and the timing of the base station is realized, the cross-frequency band timing misplacement problem is solved, and the cross-frequency band communication is stable and reliable.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a communication method, system and storage medium. Background Technology

[0002] While existing cross-band frequency conversion communication schemes can achieve frequency conversion, cross-band TDD (Time Division Duplexing) timing synchronization is difficult, which can easily lead to problems such as uplink and downlink timing misalignment, transmit and receive interference, and power amplifier (PA) power consumption ineffectiveness. Summary of the Invention

[0003] To address the aforementioned technical issues, this application discloses a communication method, system, and storage medium. In frequency conversion scenarios, the transmission timing of the downlink signal after frequency conversion is controlled by reusing the base station's native timing control signal. The power amplifier corresponding to the downlink signal after frequency conversion only operates in the downlink time slot, avoiding signal transmission and reception interference and power amplifier ineffective power consumption. This achieves precise synchronization between the timing of the downlink signal after frequency conversion and the base station timing, solving the problem of cross-frequency band timing misalignment and ensuring stable and reliable cross-frequency band communication. On one hand, this application provides a communication method applied to a base station corresponding to a first frequency band, the method comprising: The first downlink signal corresponding to the first frequency band and the timing control signal corresponding to the first frequency band are acquired; the timing control signal is used to control the transmission timing of the first downlink signal. The first downlink signal is frequency-converted to obtain a second downlink signal corresponding to the second frequency band; the second frequency band is different from the first frequency band. The second downlink signal is amplified based on the timing control signal to obtain the first transmit signal; The first transmission signal is sent to the first terminal.

[0004] In some embodiments, the step of performing power amplification processing on the second downlink signal based on the timing control signal to obtain the first transmit signal includes: Extract timing information from the timing control signal; the timing information includes the start and end information of the downlink time period and the start and end information of the uplink time period. A first control signal is generated during the downlink time period so that the power amplifier corresponding to the second frequency band amplifies the power of the second downlink signal to obtain the first transmit signal; the downlink time period is determined based on the start and end information of the downlink time period. A second control signal is generated during the uplink time period to cause the power amplifier corresponding to the second frequency band to stop working; the uplink time period is determined based on the start and end information of the uplink time period.

[0005] In some embodiments, the step of performing frequency conversion processing on the first downlink signal to obtain a second downlink signal corresponding to the second frequency band includes: The first downlink signal is mixed with a preset oscillation signal to obtain the second downlink signal.

[0006] In some embodiments, the method further includes: During the uplink time period, receive the second transmitted signal corresponding to the second frequency band sent by the first terminal; The second transmitted signal is subjected to noise reduction processing to obtain the first noise-reduced signal; The first noise-reduced signal is frequency-converted to obtain the first received signal corresponding to the first frequency band.

[0007] In some embodiments, obtaining the first downlink signal corresponding to the first frequency band includes: Receive the third transmitted signal corresponding to the second frequency band sent by the second terminal; The third transmitted signal is subjected to noise reduction processing to obtain the second noise-reduced signal; The second noise-reduced signal is frequency-converted to obtain the second received signal corresponding to the first frequency band; The second received signal is modulated to obtain the first downlink signal.

[0008] On the other hand, this application also provides a communication method applied to a first terminal, the method comprising: The system receives a first transmitted signal corresponding to the second frequency band sent by a base station; the first transmitted signal carries timing information corresponding to the base station. The first transmitted signal is frequency-converted to obtain a frequency-converted signal corresponding to a first frequency band; the first frequency band is different from the second frequency band. The frequency conversion signal is demodulated based on the terminal control signal to obtain a third received signal; the terminal control signal is generated based on the timing information.

[0009] In some embodiments, the terminal control signal includes a third control signal, and the demodulation processing of the frequency conversion signal based on the terminal control signal to obtain a third received signal includes: Extract the timing information from the frequency conversion signal; the timing information includes the start and end information of the downlink time period. The third control signal is generated during the downlink time period; the downlink time period is determined based on the start and end information of the downlink time period. The frequency conversion signal is demodulated based on the third control signal to obtain the third received signal.

[0010] In some embodiments, the terminal control signal further includes a fourth control signal, the timing information further includes uplink time period start and end information, and the method further includes: Generate the first uplink signal corresponding to the first frequency band; The fourth control signal is generated during the uplink time period; the uplink time period is determined based on the start and end information of the uplink time period. Based on the fourth control signal, the first uplink signal is frequency-converted to obtain the second uplink signal corresponding to the second frequency band; The second uplink signal is amplified to obtain the second transmit signal; The second transmission signal is sent to the base station.

[0011] On the other hand, this application also provides a communication system, the system including a base station and at least one terminal; The base station is used to perform the communication method as described above; The at least one terminal is used to perform the communication method as described above.

[0012] On the other hand, this application also provides a computer-readable storage medium storing at least one instruction or at least one program, which is loaded and executed by a processor to implement the communication method as described above.

[0013] Implementing the embodiments of this application has the following beneficial effects: The communication method disclosed in this application controls the transmission timing of the downlink signal after frequency conversion in a frequency conversion scenario by reusing the original timing control signal of the base station. The power amplifier corresponding to the downlink signal after frequency conversion only works in the downlink time slot, avoiding signal transmission and reception interference and power amplifier ineffective power consumption. This achieves precise synchronization between the timing of the downlink signal after frequency conversion and the timing of the base station, solves the problem of cross-frequency band timing misalignment, and ensures stable and reliable cross-frequency band communication. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A flowchart illustrating a communication method provided in an embodiment of this application; Figure 2 This application provides a schematic diagram of the structure of a communication system according to an embodiment of the present application. Figure 3 This application provides a schematic diagram of the structure of a communication system according to an embodiment of the present application. Figure 4 A flowchart illustrating a communication method provided in an embodiment of this application; Figure 5 This application provides a schematic diagram of the structure of a communication system according to an embodiment of the present application. Figure 6 This is a schematic diagram of the hardware structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0017] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Furthermore, the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such information can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in a sequence other than that illustrated or described herein.

[0018] See Figure 1 , Figure 1 This is a flowchart illustrating a communication method provided in an embodiment of this application. The method is applied to a base station corresponding to a first frequency band, and the method includes: S101, acquire the first downlink signal corresponding to the first frequency band and the timing control signal corresponding to the first frequency band; the timing control signal is used to control the transmission timing of the first downlink signal; In some embodiments, the base station can generate a first downlink signal belonging to a first frequency band and a timing control signal corresponding to the first frequency band. The timing control signal corresponding to the first frequency band refers to the base station's native timing control signal, which is used to provide a precise on / off command for the transmission link inside the base station under the TDD communication standard, so as to ensure that the base station transmits signals only in the downlink time slot and receives signals in the uplink time slot. Even in communication scenarios that do not involve frequency conversion, the base station will generate a timing control signal corresponding to the first frequency band. The timing control signal corresponding to the first frequency band includes the length and ratio of the uplink and downlink time slots (i.e., timing ratio), and is a base station native control signal that appears periodically according to the timing ratio.

[0019] S103, perform frequency conversion processing on the first downlink signal to obtain a second downlink signal corresponding to the second frequency band; the second frequency band is different from the first frequency band. In some embodiments, a first downlink signal belonging to a first frequency band is frequency-converted to obtain a second downlink signal belonging to a second frequency band.

[0020] S105, the second downlink signal is amplified based on the timing control signal to obtain the first transmit signal; In some embodiments, the power amplifier corresponding to the second frequency band is controlled by reusing the original timing control signal of the base station to perform power amplification processing on the frequency-converted second downlink signal. Specifically, the timing control signal corresponding to the first frequency band becomes active (e.g., high level) only at the beginning of the downlink time slot and becomes inactive (e.g., low level) at the end of the downlink time slot, so that the power amplifier corresponding to the second frequency band only works in the downlink time slot to perform power amplification processing on the second downlink signal, and stops working during the uplink time slot and guard interval.

[0021] S107, the first transmission signal is sent to the first terminal.

[0022] In some embodiments, the first transmit signal obtained by amplifying the power of the second downlink signal is sent to the first terminal.

[0023] In some embodiments, the step of performing power amplification processing on the second downlink signal based on the timing control signal to obtain the first transmit signal includes: Extract timing information from the timing control signal; the timing information includes the start and end information of the downlink time period and the start and end information of the uplink time period. A first control signal is generated during the downlink time period so that the power amplifier corresponding to the second frequency band amplifies the power of the second downlink signal to obtain the first transmit signal; the downlink time period is determined based on the start and end information of the downlink time period. A second control signal is generated during the uplink time period to cause the power amplifier corresponding to the second frequency band to stop working; the uplink time period is determined based on the start and end information of the uplink time period.

[0024] In some embodiments, the timing control signal corresponding to the first frequency band includes timing information, which includes the start and end information of the downlink time period (i.e., downlink time slot) and the start and end information of the uplink time period (i.e., uplink time slot). A first control signal is generated during the downlink time period so that the power amplifier corresponding to the second frequency band performs power amplification processing on the second downlink signal to obtain the first transmit signal. A second control signal is generated during the uplink time period so that the power amplifier corresponding to the second frequency band stops working.

[0025] In the frequency conversion scenario, this application embodiment controls the transmission timing of the downlink signal after frequency conversion by reusing the original timing control signal of the base station. The power amplifier corresponding to the downlink signal after frequency conversion only works in the downlink time slot, avoiding signal transmission and reception interference and power amplifier ineffective power consumption. This achieves accurate synchronization between the timing of the downlink signal after frequency conversion and the timing of the base station, solves the problem of cross-frequency band timing misalignment, and ensures stable and reliable cross-frequency band communication.

[0026] In some embodiments, the step of performing frequency conversion processing on the first downlink signal to obtain a second downlink signal corresponding to the second frequency band includes: The first downlink signal is mixed with a preset oscillation signal to obtain the second downlink signal.

[0027] In some embodiments, a local oscillator (LO) generates a preset oscillation signal, and the first downlink signal is frequency-converted by mixing the first downlink signal with the preset oscillation signal, thereby converting the first downlink signal belonging to the first frequency band into a second downlink signal belonging to the second frequency band.

[0028] This application embodiment uses a mixing process to convert a first downlink signal belonging to the first frequency band into a second downlink signal belonging to the second frequency band, ensuring the accuracy and stability of frequency conversion.

[0029] In some embodiments, the method further includes: During the uplink time period, receive the second transmitted signal corresponding to the second frequency band sent by the first terminal; The second transmitted signal is subjected to noise reduction processing to obtain the first noise-reduced signal; The first noise-reduced signal is frequency-converted to obtain the first received signal corresponding to the first frequency band.

[0030] In some embodiments, see Figure 2 , Figure 2This is a schematic diagram of a communication system provided in an embodiment of this application. The communication system includes a base station and a first terminal. Figure 2 In the diagram, ① represents the first frequency band, and ② represents the second frequency band. During the downlink period, the base station generates a first downlink signal belonging to the first frequency band, which is then converted and amplified to obtain a first transmit signal belonging to the second frequency band. The first terminal receives the first transmit signal and converts and demodulates it to obtain a third receive signal belonging to the first frequency band. During the uplink period, the first terminal generates a first uplink signal belonging to the first frequency band, which is converted and amplified to obtain a second transmit signal belonging to the second frequency band. The base station receives the second transmit signal and reduces noise and converts it to obtain a first receive signal belonging to the first frequency band.

[0031] For example, the first frequency band could be the N41 band (frequency range 2496-2690MHz), and the second frequency band could be the N50 band (frequency range 1432-1517MHz). The N50 band belongs to the FR1 (Frequency Range 1) band in the Sub-6GHz range. Due to its lower frequency, it has better radio wave propagation and penetration characteristics compared to bands above 2.5GHz, making it particularly suitable for private network scenarios with wide coverage and high penetration requirements. However, currently, 5G network equipment natively supporting the N50 band (including macro base stations, small base stations, CPEs, data transmission modules, and smartphones) is scarce, expensive, and has an unstable supply chain, creating a technical bottleneck of "having spectrum but no equipment." The N41 band is the most widely used and mature 5G band globally. As one of the TDD frequency bands, the N41 band has benefited from its early application in TD-LTE (Time Division Duplex Long Term Evolution) networks and its smooth evolution to 5G. It has formed a large and mature industrial ecosystem, with a large number of cost-effective N41 base stations (especially small cells), CPEs (Customer Premise Equipment), communication modules, and chips from various suppliers. These devices have been validated through large-scale commercial deployments, demonstrating mature technology, stable performance, and low cost. Therefore, the mature equipment ecosystem of the N41 band can be leveraged to quickly and cost-effectively build 5G private networks operating in the N50 band.

[0032] Specifically, the base station side workflow includes: (1) Signal generation: The N41 small base station generates the 5G NR (New Radio) downlink radio frequency signal (i.e., the first downlink signal corresponding to the first frequency band) of the N41 band according to the standard TDD timing, and outputs it to the base station's frequency conversion radio frequency front-end module; (2) Downconversion: The bidirectional frequency converter receives the N41 downlink radio frequency signal, performs mixing processing with the local oscillator, and downconverts the N41 signal to the N50 band; (3) Power amplification and synchronization control: The N50 band dedicated power amplifier PA receives the converted N50 signal (i.e., the second downlink signal corresponding to the second frequency band), and under the drive of the control signal output by the TDD synchronization control unit (i.e., the timing control signal corresponding to the first frequency band), it only guides the downlink signal in the downlink time slot. The N50 signal is amplified to improve signal coverage. The timing control signal can be the native "TXon" signal of the N41 base station. The "TXon" signal is the native hardware control signal generated inside the standard N41 small base station, which is used to indicate its downlink transmission timing. (4) Signal transmission: The amplified N50 downlink signal (i.e. the first transmission signal) is transmitted through the first antenna unit. (5) Uplink reception: In the uplink time slot, the first antenna unit receives the N50 uplink signal (i.e. the second transmission signal corresponding to the second frequency band) sent by the terminal. After noise reduction by the N50 frequency band low noise amplifier (LNA), it is sent to the uplink channel of the bidirectional frequency converter, up-converted back to the N41 frequency band (i.e. the first reception signal corresponding to the first frequency band), and then sent to the receiving port of the N41 small base station to complete the uplink signal transmission.

[0033] This application embodiment controls the base station to send frequency-converted signals to the terminal in the downlink time slot and receive frequency-converted signals sent by the terminal in the uplink time slot by reusing the base station's native timing control signals. This ensures timing synchronization of bidirectional cross-frequency band communication between the base station and the terminal, avoids transmission and reception interference, and improves communication stability.

[0034] In some embodiments, obtaining the first downlink signal corresponding to the first frequency band includes: Receive the third transmitted signal corresponding to the second frequency band sent by the second terminal; The third transmitted signal is subjected to noise reduction processing to obtain the second noise-reduced signal; The second noise-reduced signal is frequency-converted to obtain the second received signal corresponding to the first frequency band; The second received signal is modulated to obtain the first downlink signal.

[0035] In some embodiments, see Figure 3 , Figure 3 This is a schematic diagram of a communication system provided in an embodiment of this application. The communication system includes a base station, a first terminal, and a second terminal. Figure 3 In the diagram, ① represents the first frequency band, and ② represents the second frequency band. During the uplink period, the second terminal generates a second downlink signal belonging to the first frequency band, and obtains a third transmit signal belonging to the second frequency band through frequency conversion and power amplification. The base station receives the third transmit signal and obtains a second receive signal belonging to the first frequency band through noise reduction and frequency conversion. During the downlink period, the base station obtains a first transmit signal belonging to the second frequency band through modulation, frequency conversion, and power amplification. The first terminal receives the first transmit signal and obtains a third receive signal belonging to the first frequency band through frequency conversion and demodulation.

[0036] This application embodiment controls the base station to receive signals sent by the second terminal in the uplink time slot by reusing the base station's native timing control signals. After processing, the signals are then sent to the first terminal in the downlink time slot, ensuring timing synchronization of cross-frequency band communication between the base station and multiple terminals, avoiding transmission and reception interference, and improving communication stability.

[0037] See Figure 4 , Figure 4 This is a flowchart illustrating a communication method provided in an embodiment of this application. The method is applied to a first terminal and includes: S401, Receive a first transmission signal corresponding to the second frequency band sent by the base station; the first transmission signal carries timing information corresponding to the base station; In some embodiments, the first terminal receives a first transmission signal belonging to the second frequency band sent by the base station. The first transmission signal carries timing information corresponding to the base station, namely the timing information in the timing control signal, including downlink time period start and end information and uplink time period start and end information.

[0038] S403, perform frequency conversion processing on the first transmitted signal to obtain a frequency conversion signal corresponding to the first frequency band; the first frequency band is different from the second frequency band; In some embodiments, the first transmitted signal belonging to the second frequency band is frequency-converted to obtain a frequency-converted signal belonging to the first frequency band.

[0039] S405, the frequency conversion signal is demodulated based on the terminal control signal to obtain a third received signal; the terminal control signal is generated based on the timing information.

[0040] In some embodiments, a terminal control signal for controlling the timing of the first terminal is generated based on timing information, and the first terminal is controlled to demodulate the frequency conversion signal in the downlink time slot based on the terminal control signal to obtain a third received signal belonging to the first frequency band.

[0041] In the frequency conversion scenario, the embodiments of this application enable the terminal to autonomously parse and utilize the timing information from the base station to generate local control signals to precisely control the demodulation process. This achieves reliable synchronization of cross-frequency band TDD timing between the terminal and the base station, ensuring that the terminal receives signals in the correct time window and guaranteeing the stability of cross-frequency band bidirectional communication.

[0042] In some embodiments, the terminal control signal includes a third control signal, and the demodulation processing of the frequency conversion signal based on the terminal control signal to obtain a third received signal includes: Extract the timing information from the frequency conversion signal; the timing information includes the start and end information of the downlink time period. The third control signal is generated during the downlink time period; the downlink time period is determined based on the start and end information of the downlink time period. The frequency conversion signal is demodulated based on the third control signal to obtain the third received signal.

[0043] In some embodiments, a third control signal is generated during the downlink time period so that the radio frequency switch connects the antenna path to the receiving port of the CPE module, and the CPE module demodulates the frequency conversion signal and performs subsequent data processing to obtain the third received signal.

[0044] In the frequency conversion scenario, the embodiments of this application enable the terminal to autonomously parse and utilize the timing information from the base station to generate local control signals to precisely control the demodulation process. This achieves reliable synchronization of cross-frequency band TDD timing between the terminal and the base station, ensuring that the terminal receives signals in the correct time window and guaranteeing the stability of cross-frequency band bidirectional communication.

[0045] In some embodiments, the terminal control signal further includes a fourth control signal, the timing information further includes uplink time period start and end information, and the method further includes: Generate the first uplink signal corresponding to the first frequency band; The fourth control signal is generated during the uplink time period; the uplink time period is determined based on the start and end information of the uplink time period. Based on the fourth control signal, the first uplink signal is frequency-converted to obtain the second uplink signal corresponding to the second frequency band; The second uplink signal is amplified to obtain the second transmit signal; The second transmission signal is sent to the base station.

[0046] In some embodiments, a fourth control signal is generated during the uplink time period to switch the radio frequency switch to the CPE module's transmit port, sending the first uplink signal generated by the CPE module into a bidirectional frequency converter. The bidirectional frequency converter converts the first uplink signal into a second uplink signal belonging to the second frequency band. After being amplified by the power amplifier corresponding to the second frequency band, it is transmitted to the base station through the second antenna unit to complete bidirectional communication.

[0047] For example, the first frequency band can be the N41 band (frequency range 2496-2690MHz), and the second frequency band can be the N50 band (frequency range 1432-1517MHz). The terminal-side (CPE) workflow includes: (1) Signal reception: The second antenna unit receives the N50 downlink signal (i.e., the first transmitted signal) transmitted by the base station and sends it to the terminal frequency conversion RF front-end module; (2) Downconversion recovery: The bidirectional frequency converter downconverts the N50 downlink signal to the N41 band signal (i.e., the frequency conversion signal corresponding to the first frequency band), and sends part of the signal to the standard N41 CPE module, and the other part of the signal to the independent timing analysis module; (3) Timing analysis and path switching: The independent timing analysis module analyzes the frame structure of the N41 signal, extracts the length and ratio of the uplink and downlink time slots, and outputs GPIO (General Purpose Input). Output (General Purpose Input / Output) control signal (i.e., terminal control signal) drives the RF switch. In the downlink time slot, the RF switch connects the antenna path to the CPE module receiving port. The CPE module demodulates the signal and performs subsequent data processing. (4) Signal transmission: In the uplink time slot, the RF switch switches to the CPE module transmitting port and sends the N41 uplink signal (i.e., the first uplink signal corresponding to the first frequency band) generated by the CPE module to the bidirectional frequency converter. The bidirectional frequency converter upconverts the N41 uplink signal to the N50 frequency band signal (i.e., the second uplink signal corresponding to the second frequency band). After being amplified by the PA, it is transmitted to the base station through the second antenna unit to complete bidirectional communication.

[0048] In the frequency conversion scenario, the present application embodiment uses the terminal to autonomously parse and utilize the timing information from the base station to generate a local control signal to accurately control the frequency conversion process. This achieves reliable synchronization of cross-band TDD timing between the terminal and the base station, ensuring that the terminal transmits signals in the correct time window and guaranteeing the stability of cross-band bidirectional communication.

[0049] This application provides a communication method applied to a base station corresponding to a first frequency band. The method includes: acquiring a first downlink signal corresponding to the first frequency band and a timing control signal corresponding to the first frequency band; the timing control signal is used to control the transmission timing of the first downlink signal; performing frequency conversion processing on the first downlink signal to obtain a second downlink signal corresponding to a second frequency band; the second frequency band is different from the first frequency band; performing power amplification processing on the second downlink signal based on the timing control signal to obtain a first transmit signal; and transmitting the first transmit signal to a first terminal. In the frequency conversion scenario, this application uses the base station's native timing control signal to control the transmission timing of the frequency-converted downlink signal. The power amplifier corresponding to the frequency-converted downlink signal only operates in the downlink time slot, avoiding signal transmission and reception interference and power amplifier ineffective power consumption. This achieves precise synchronization between the timing of the frequency-converted downlink signal and the base station timing, solving the problem of cross-frequency band timing misalignment and ensuring stable and reliable cross-frequency band communication.

[0050] See Figure 5 , Figure 5 This is a schematic diagram of a communication system provided in an embodiment of this application. The communication system mainly consists of two parts: base station-side equipment and terminal-side equipment, as follows: The base station-side equipment consists of a standard N41 small base station, a base station-side frequency conversion radio frequency front-end module, and an N50 band first antenna unit. The standard N41 small base station is existing mature equipment that requires no hardware or software modification and is responsible for generating and processing N41 band radio frequency signals. The terminal-side equipment (CPE) consists of a standard N41 CPE module, a terminal frequency conversion radio frequency front-end module, and an N50 band second antenna unit. The standard N41 CPE module is also existing mature equipment that requires no modification and is responsible for receiving and processing N41 band radio frequency signals. The entire communication system operates entirely in N41 mode at the protocol stack level (physical layer, MAC layer, network layer, etc.). The baseband chips and protocol stack software of the base station and terminal do not require any modification and always believe they are communicating in the N41 band. Frequency conversion is completely transparently completed at the radio frequency front-end and does not affect upper-layer service data transmission.

[0051] The structure of the frequency conversion radio frequency front-end module of the base station and the terminal is the same. Both are bidirectional designs and include the following components: (1) Bidirectional frequency converter: built-in fixed local oscillator, used to realize bidirectional mixing conversion between N41 band and N50 band. In the downlink direction, the N41 signal is downconverted to N50 band, and in the uplink direction, the N50 signal is upconverted to N41 band. The conversion accuracy meets the requirements of 5GNR signal transmission; (2) N50 band dedicated power amplifier (PA): designed for the propagation loss characteristics of N50 band (1432-1517 MHz), improves signal transmission power and coverage, and reduces ineffective power consumption. Its enable state is precisely controlled by TDD timing control signal; (3) N50 band low noise amplifier (LNA): adapted to the interference characteristics of N50 band, reduces signal reception noise, improves reception sensitivity, and ensures signal transmission quality in long-distance and high-obstruction environments in private network scenarios. The radio frequency switch (RFSwitch) is configured only in the terminal frequency conversion module and is used to switch the terminal transceiver path. It is driven by the terminal control signal output by the timing parsing module on the terminal side to achieve synchronization and alignment with the TDD timing on the base station side.

[0052] The TDD synchronization mechanism is divided into two parts: base station-side synchronization and terminal-side synchronization. (1) Base station-side native TDD synchronization multiplexing: The base station-side frequency converter module integrates a TDD synchronization control unit. This unit directly reuses the native TDD timing control signal of the N41 small base station (such as the "TXon" signal), extracts the downlink time slot timing information, and outputs the first control signal to the enable terminal of the N50 dedicated PA. This ensures that the PA only operates in the downlink time slot and closes the uplink time slot, avoiding uplink reception interference and reducing the PA's ineffective power consumption. This achieves accurate synchronization with the TDD timing of the N41 base station without the need for additional components. Synchronization module or signaling; (2) Independent TDD timing analysis on the terminal side: The terminal frequency conversion module integrates an independent timing analysis module. This module directly receives the N41 band signal after downconversion and recovery. By analyzing the 5G signal frame structure, such as PSS / SSS synchronization signal (main synchronization signal / auxiliary synchronization signal), time slot ratio information, etc., it accurately extracts the uplink and downlink time slot timing information, outputs GPIO control signals to drive the radio frequency switch, realizes the automatic switching of the terminal side's transmit and receive path, ensures complete alignment with the TDD timing of the base station side, and does not need to rely on the base station to send additional synchronization signaling, thereby improving the system's flexibility and reliability.

[0053] The embodiments of this application have the following beneficial effects: (1) Significantly reduce network construction costs: Reuse the mature N41 band equipment ecosystem, without the need to purchase expensive and scarce N50 native equipment, and without the need to modify the equipment baseband and protocol stack, saving software development and debugging costs and shortening the project deployment cycle; (2) Achieve rapid and compliant deployment: Without waiting for the N50 industry chain to mature, it is only necessary to integrate the frequency conversion radio frequency front-end module on the existing N41 equipment, so that a compliant 5G private network can be quickly built in areas where only the N50 band is approved, solving the deployment dilemma of "having spectrum but no equipment"; (3) High reliability of cross-band synchronization: Through the dual-end collaborative synchronization mechanism of base station side native timing control signal multiplexing and terminal side independent frame structure parsing, the cross-band TDD timing misalignment problem is completely solved. Avoid interference between transmission and reception, reduce the system error rate, and significantly improve communication stability; (4) Fully transparent and highly compatible: The baseband chip and protocol stack software of the N41 base station and terminal are completely transparent and require no modification. It is compatible with N41 equipment from any supplier and has strong scalability and maintainability, reducing the cost of equipment replacement and upgrade; (5) Activate low-frequency spectrum resources: Provide a practical application path for low-frequency spectrum such as N50 that has been allocated but has slow industrialization, and improve the efficiency of spectrum resource utilization; (6) Outstanding scenario adaptability: The LNA / PA design optimized for the propagation and penetration characteristics of the N50 band is more suitable for private network scenarios with wide coverage and high obstruction, such as industrial plants, mines, and remote areas, and meets the core needs of industrial IoT and data transmission.

[0054] This application embodiment also provides a communication device, the device comprising: The signal acquisition module is used to acquire a first downlink signal corresponding to the first frequency band and a timing control signal corresponding to the first frequency band; the timing control signal is used to control the transmission timing of the first downlink signal. The first frequency conversion module is used to perform frequency conversion processing on the first downlink signal to obtain a second downlink signal corresponding to the second frequency band; the second frequency band is different from the first frequency band. A first power amplification module is used to amplify the power of the second downlink signal based on the timing control signal to obtain a first transmit signal; The first signal transmitting module is used to send the first transmitting signal to the first terminal.

[0055] In some embodiments, the first power amplification module includes: The first timing information extraction unit is used to extract timing information from the timing control signal; the timing information includes downlink time period start and end information and uplink time period start and end information. The first control signal generation unit is used to generate a first control signal during a downlink time period, so that the power amplifier corresponding to the second frequency band performs power amplification processing on the second downlink signal to obtain the first transmit signal; the downlink time period is determined based on the start and end information of the downlink time period. The second control signal generation unit is used to generate a second control signal during the uplink time period so that the power amplifier corresponding to the second frequency band stops working; the uplink time period is determined based on the start and end information of the uplink time period.

[0056] In some embodiments, the first frequency converter module includes: A mixing unit is used to mix the first downlink signal with a preset oscillation signal to obtain the second downlink signal.

[0057] In some embodiments, the apparatus further includes: The second transmit signal receiving module is used to receive the second transmit signal corresponding to the second frequency band sent by the first terminal during the uplink time period; A noise reduction module is used to perform noise reduction processing on the second transmitted signal to obtain a first noise-reduced signal; The second frequency conversion module is used to perform frequency conversion processing on the first noise reduction signal to obtain the first received signal corresponding to the first frequency band.

[0058] In some embodiments, the signal acquisition module includes: The third transmission signal receiving unit is used to receive the third transmission signal corresponding to the second frequency band sent by the second terminal; A noise reduction unit is used to perform noise reduction processing on the third transmitted signal to obtain a second noise-reduced signal; A frequency conversion unit is used to perform frequency conversion processing on the second noise reduction signal to obtain a second received signal corresponding to the first frequency band. A modulation unit is used to modulate the second received signal to obtain the first downlink signal.

[0059] This application embodiment also provides a communication device, the device comprising: The first transmission signal receiving module is used to receive a first transmission signal corresponding to the second frequency band sent by the base station; the first transmission signal carries timing information corresponding to the base station. The third frequency conversion module is used to perform frequency conversion processing on the first transmitted signal to obtain a frequency conversion signal corresponding to the first frequency band; the first frequency band is different from the second frequency band. The demodulation module is used to demodulate the frequency conversion signal based on the terminal control signal to obtain a third received signal; the terminal control signal is generated based on the timing information.

[0060] In some embodiments, the terminal control signal includes a third control signal, and the demodulation module includes: The second timing information extraction unit is used to extract the timing information from the frequency conversion signal; the timing information includes the start and end information of the downlink time period. The third control signal generation unit is used to generate the third control signal during the downlink time period; the downlink time period is determined based on the start and end information of the downlink time period. The demodulation unit is used to demodulate the frequency conversion signal based on the third control signal to obtain the third received signal.

[0061] In some embodiments, the terminal control signal further includes a fourth control signal, the timing information further includes uplink time period start and end information, and the device further includes: The first uplink signal generation module is used to generate the first uplink signal corresponding to the first frequency band; The fourth control signal generation module is used to generate the fourth control signal during the uplink time period; the uplink time period is determined based on the start and end information of the uplink time period. The fourth frequency conversion module is used to perform frequency conversion processing on the first uplink signal based on the fourth control signal to obtain the second uplink signal corresponding to the second frequency band; The second power amplifier module is used to amplify the power of the second uplink signal to obtain the second transmit signal; The second signal transmitting module is used to send the second transmitting signal to the base station.

[0062] The apparatus provided in the above embodiments can execute the method provided in any embodiment of this application, and has the corresponding functional modules and beneficial effects for executing the method. Technical details not described in detail in the above embodiments can be found in a communication method provided in any embodiment of this application.

[0063] This embodiment also provides a computer-readable storage medium storing computer-executable instructions, which are loaded by a processor and executed by a communication method described above in this embodiment.

[0064] This embodiment also provides an electronic device, which includes a processor and a memory, wherein the memory stores a computer program adapted to be loaded by the processor and executed as described above in this embodiment.

[0065] The electronic device may be a computer terminal, a mobile terminal, or a server, and may also participate in constituting the apparatus or system provided in the embodiments of this application. For example... Figure 6As shown, electronic device 6 may include one or more (shown as 602a, 602b, ..., 602n in the figure) processors 602 (processors 602 may include, but are not limited to, microprocessors MCUs or programmable logic devices FPLDs), memory 604 for storing information, and transmission devices 606 for communication functions. In addition, it may also include: input / output interfaces (I / O interfaces) and network interfaces. Those skilled in the art will understand that... Figure 6 The structure shown is for illustrative purposes only and does not limit the structure of the aforementioned electronic device. For example, electronic device 6 may also include... Figure 6 The more or fewer components shown, or having the same Figure 6 The different configurations shown.

[0066] It should be noted that the aforementioned one or more processors 602 and / or other information processing circuits are generally referred to herein as "information processing circuits". These information processing circuits may be wholly or partially embodied in software, hardware, firmware, or any other combination thereof. Furthermore, the information processing circuits may be a single, independent processing module, or may be wholly or partially integrated into any other element in the electronic device 6.

[0067] The memory 604 can be used to store software programs and modules of application software, such as the program instruction / information storage device corresponding to the method described in the embodiments of this application. The processor 602 executes various functional applications and information processing by running the software programs and modules stored in the memory 604, thereby realizing the above-mentioned communication method. The memory 604 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 604 may further include memory remotely located relative to the processor 602, and these remote memories can be connected to the electronic device 6 via a network. Examples of the above-mentioned networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0068] The transmission device 606 is used to receive or send information via a network. Specific examples of the network described above may include a wireless network provided by the communication provider of the electronic device 6. In one example, the transmission device 606 includes a Network Interface Controller (NIC), which can connect to other network devices via a base station to communicate with the Internet. In another example, the transmission device 606 may be a Radio Frequency (RF) module, used for wireless communication with the Internet.

[0069] This specification provides the operational steps of the methods described in the embodiments or flowcharts, but more or fewer operational steps may be included based on conventional or non-inventive labor. The steps and order listed in the embodiments are merely one possible execution order among many steps and do not represent the only execution order. In actual system or interrupt product execution, the methods shown in the embodiments or drawings can be executed sequentially or in parallel (e.g., in a parallel processor or multi-threaded processing environment).

[0070] The structure shown in this embodiment is only a partial structure related to the solution of this application and does not constitute a limitation on the device to which the solution of this application is applied. Specific devices may include more or fewer components than shown, or combinations of certain components, or arrangements of different components. It should be understood that the methods, apparatuses, etc., disclosed in this embodiment can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For example, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between devices or unit modules through some interfaces.

[0071] Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0072] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed in this specification can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of each example have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0073] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A communication method, characterized in that, The method is applied to a base station corresponding to a first frequency band, and the method includes: The first downlink signal corresponding to the first frequency band and the timing control signal corresponding to the first frequency band are acquired; the timing control signal is used to control the transmission timing of the first downlink signal. The first downlink signal is frequency-converted to obtain a second downlink signal corresponding to the second frequency band; the second frequency band is different from the first frequency band. The second downlink signal is amplified based on the timing control signal to obtain the first transmit signal; The first transmission signal is sent to the first terminal.

2. The communication method according to claim 1, characterized in that, The step of amplifying the power of the second downlink signal based on the timing control signal to obtain the first transmit signal includes: Extract timing information from the timing control signal; the timing information includes the start and end information of the downlink time period and the start and end information of the uplink time period. A first control signal is generated during the downlink time period so that the power amplifier corresponding to the second frequency band amplifies the power of the second downlink signal to obtain the first transmit signal; the downlink time period is determined based on the start and end information of the downlink time period. A second control signal is generated during the uplink time period to cause the power amplifier corresponding to the second frequency band to stop working; the uplink time period is determined based on the start and end information of the uplink time period.

3. The communication method according to claim 1, characterized in that, The step of performing frequency conversion processing on the first downlink signal to obtain the second downlink signal corresponding to the second frequency band includes: The first downlink signal is mixed with a preset oscillation signal to obtain the second downlink signal.

4. The communication method according to claim 2, characterized in that, The method further includes: During the uplink time period, receive the second transmitted signal corresponding to the second frequency band sent by the first terminal; The second transmitted signal is subjected to noise reduction processing to obtain the first noise-reduced signal; The first noise-reduced signal is frequency-converted to obtain the first received signal corresponding to the first frequency band.

5. The communication method according to claim 1, characterized in that, The step of obtaining the first downlink signal corresponding to the first frequency band includes: Receive the third transmitted signal corresponding to the second frequency band sent by the second terminal; The third transmitted signal is subjected to noise reduction processing to obtain the second noise-reduced signal; The second noise-reduced signal is frequency-converted to obtain the second received signal corresponding to the first frequency band; The second received signal is modulated to obtain the first downlink signal.

6. A communication method, characterized in that, The method is applied to a first terminal, and the method includes: The system receives a first transmitted signal corresponding to the second frequency band sent by a base station; the first transmitted signal carries timing information corresponding to the base station. The first transmitted signal is frequency-converted to obtain a frequency-converted signal corresponding to a first frequency band; the first frequency band is different from the second frequency band. The frequency conversion signal is demodulated based on the terminal control signal to obtain a third received signal; the terminal control signal is generated based on the timing information.

7. The communication method according to claim 6, characterized in that, The terminal control signal includes a third control signal, and the demodulation processing of the frequency conversion signal based on the terminal control signal to obtain the third received signal includes: Extract the timing information from the frequency conversion signal; the timing information includes the start and end information of the downlink time period. The third control signal is generated during the downlink time period; the downlink time period is determined based on the start and end information of the downlink time period. The frequency conversion signal is demodulated based on the third control signal to obtain the third received signal.

8. The communication method according to claim 7, characterized in that, The terminal control signal further includes a fourth control signal, and the timing information further includes uplink time period start and end information. The method further includes: Generate the first uplink signal corresponding to the first frequency band; The fourth control signal is generated during the uplink time period; the uplink time period is determined based on the start and end information of the uplink time period. Based on the fourth control signal, the first uplink signal is frequency-converted to obtain the second uplink signal corresponding to the second frequency band; The second uplink signal is amplified to obtain the second transmit signal; The second transmission signal is sent to the base station.

9. A communication system, characterized in that, The system includes a base station and at least one terminal; The base station is used to perform the communication method as described in any one of claims 1-5; The at least one terminal is used to perform the communication method as described in any one of claims 6-8.

10. A computer-readable storage medium, characterized in that, The storage medium stores at least one instruction or at least one program segment, which is loaded and executed by a processor to implement the communication method as described in any one of claims 1-8.

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