Signal transmission method and device based on power line carrier, computer equipment and storage medium

Abstract

The invention relates to a signal transmission method based on a power line carrier, and the method comprises the steps: obtaining a received alternative digital signal, analyzing the intensity and stability of the alternative digital signal, obtaining an optimal signal, and enabling the optimal signal to serve as a signal source; analyzing an NR protocol stack of the signal source to obtain architecture parameters of the signal source; the PLC modem is configured according to the architecture parameters; the PLC modem carries out signal conversion according to the configuration and converts a digital signal into an analog signal; the method comprises the following steps: acquiring a wiring mode and impedance of a power line for transmitting an analog signal, determining transmission parameters of the analog signal according to the wiring mode and the impedance, and transmitting the analog signal in the power line according to the transmission parameters. The PLC modem and 5G digital signals are integrated into one terminal, miniaturization is achieved, and meanwhile the requirement for 5G signal transmission is met.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a signal transmission method, device, computer equipment and storage medium based on power line carrier. Background Art

[0002] With the rapid development and widespread adoption of the Internet of Things (IoT), the demand for smart homes is increasing. Traditional Wi-Fi coverage solutions are often hampered by factors such as wall obstruction and distance limitations, making it difficult to achieve comprehensive and stable network coverage. Furthermore, in multi-room or multi-story homes, the wireless signal strength of a single router is insufficient to meet daily usage needs, especially for high-bandwidth applications such as HD video streaming and online gaming. Consequently, there is a strong market demand for products and services that can effectively improve the quality of in-home networks.

[0003] Currently, several solutions are available on the market, including but not limited to: adding multiple Wi-Fi access points, using network cable bridging technology, and deploying mesh Wi-Fi systems. Adding multiple Wi-Fi access points can expand network coverage to a certain extent, but the configuration is complex and prone to channel interference. While network cable bridging is stable and reliable, it is labor-intensive and costly. And while mesh Wi-Fi systems offer ease of use and flexibility, they can still experience signal attenuation and other issues in certain environments. Summary of the Invention

[0004] The object of the present invention is to provide a signal transmission method based on a power line carrier to solve the problems in the background technology.

[0005] A first aspect of the present invention provides a signal transmission method based on a power line carrier, comprising: Acquire the received candidate digital signal, analyze the strength and stability of the candidate digital signal, and obtain an optimal signal, wherein the optimal signal is used as a signal source; Parsing the NR protocol stack of the signal source to obtain architecture parameters of the signal source; configuring the PLC modem according to the architecture parameters; The PLC modem performs signal conversion according to the configuration to convert the digital signal into an analog signal; A wiring pattern and impedance of a power line for transmitting an analog signal are obtained, transmission parameters of the analog signal are determined according to the wiring pattern and impedance, and the analog signal is transmitted in the power line according to the transmission parameters.

[0006] In this invention, 5G digital signals are effectively screened to obtain the strongest and most stable 5G signal as the signal source for transmission. This signal source is then effectively analyzed, enabling the PLC modem to quickly and accurately convert the digital signal into an analog signal suitable for transmission over power lines. Furthermore, the PLC modem and 5G digital signal are integrated into a single terminal, achieving miniaturization while meeting the requirements of 5G signal transmission.

[0007] In one possible implementation, obtaining the received candidate digital signal, analyzing the strength and stability of the candidate digital signal to obtain an optimal signal, and using the optimal signal as a signal source, includes: Using a MIMO antenna array to scan a three-dimensional spatial beam to obtain a plurality of candidate digital signals; Applying a blind source separation algorithm to perform interference elimination processing on each of the candidate digital signals; Signal strength detection is performed on each candidate digital signal after the interference elimination process, and the candidate digital signal with the largest signal strength is used as the signal source.

[0008] In a possible implementation, parsing the NR protocol stack of the signal source to obtain the architecture parameters of the signal source includes: When extracting PDCP layer data units, deep packet inspection is performed to filter out interference data; Extract service type features from signal source data that has undergone deep packet inspection; According to the QoS priority mapping table, the extracted service type features are classified and sorted; The architecture parameters of the signal source are determined according to the classification and sorting results.

[0009] Furthermore, configuring the PLC modem according to the architecture parameters includes: Determining an input channel of the data service type in the PLC modem according to the data service type in the architecture parameter; The order in which the data enters the PLC modem for digital-to-analog conversion is determined based on the order in which the data arrives.

[0010] In one possible implementation, obtaining a wiring pattern and an impedance of a power line for transmitting an analog signal, determining transmission parameters of the analog signal based on the wiring pattern and the impedance, and transmitting the analog signal on the power line based on the transmission parameters includes: Measure the power line reflection coefficient matrix by injecting a swept frequency test signal: In the single-phase wiring mode, the characteristic impedance is detected to be purely resistive at 50Hz. In the three-phase four-wire mode, three groups of impedance parameters are identified to be symmetrically distributed. When the line impedance Z is less than 200Ω, the high frequency band of 30-86Hz is activated and π / 4-DQPSK modulation is used. Otherwise, the low frequency band of 1-30HZ is used for transmission.

[0011] In one possible implementation, the steps of obtaining a wiring pattern and an impedance of a power line for transmitting an analog signal, determining transmission parameters of the analog signal based on the wiring pattern and the impedance, and transmitting the analog signal on the power line based on the transmission parameters further include: Monitor the working status of the power line in real time to obtain the signal-to-noise ratio (SNR) of the power line. SNR= log 10 (P s / P n ) Among them, P s is the real-time noise, P n is the base noise within 1MHz bandwidth; Determine the gain of the analog signal according to the signal-to-noise ratio, and adjust the strength of the analog signal transmitted via the power line using a PLC modem according to the gain. The gain is obtained as follows: (1) Calculate the error signal e(t): e(t) = SNR ref −SNR (t), SNR ref is the reference signal-to-noise ratio, SNR (t) is the signal-to-noise ratio at the current moment, (2) Generate control output value u(t): ‌u(t) = , e(t) is the current error value, ‌K p is the proportional gain coefficient, k i is the integral gain coefficient, k d is the differential gain coefficient, (3) Gain (dB): Gain (dB) = 20*log 10 (u(t) / V ref ), V ref is the reference voltage.

[0012] A second aspect of the present invention provides a signal transmission device based on a power line carrier, comprising: A signal acquisition module is used to obtain the received candidate digital signals, analyze the strength and stability of the candidate digital signals, and obtain an optimal signal, which is used as a signal source; a signal processing module, configured to parse the NR protocol stack of the signal source, obtain architecture parameters of the signal source, and configure the PLC modem according to the architecture parameters; A PLC modem, configured to perform signal conversion according to the configuration, converting digital signals into analog signals; an analog electrical processing module, configured to obtain a wiring pattern and an impedance of a power line for transmitting an analog signal, determine transmission parameters of the analog signal according to the wiring pattern and the impedance, and determine transmission parameters of the analog signal according to the transmission parameters; Power lines are used to transmit analog electrical signals to the user terminals.

[0013] In a possible implementation manner, the power line carrier-based signal transmission device further includes: The real-time detection module is used to monitor the working status of the power line and adjust the transmission parameters of the analog signal according to the working status of the power line.

[0014] A third aspect of the present invention provides a computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the signal transmission method based on power line carrier as described in the first aspect of the present invention is implemented.

[0015] A fourth aspect of the present invention provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the signal transmission method based on power line carrier as described in the first aspect of the present invention is implemented.

[0016] Compared with the prior art, the present invention has the following beneficial effects: By effectively screening the 5G digital signal, the strongest and most stable 5G signal is obtained as the signal source for transmission. Then, the signal source is effectively analyzed, enabling the PLC modem to quickly and accurately convert the digital signal into an analog signal that can be transmitted in the power line.

[0017] Integrating the PLC modem and 5G digital signal into one terminal achieves miniaturization while meeting the needs of 5G signal transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the flow of the signal transmission method based on power line carrier of the present invention; Figure 2 is a schematic diagram of a signal transmission device based on a power line carrier according to the present invention; Figure 3 Schematic diagram of a computer device of the present invention. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clear, the technical solutions of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, ordinary technicians in this field will not All other embodiments obtained under the premise of creative work shall fall within the scope of protection of the present invention.

[0020] It should be noted that the serial numbers assigned to the components in the embodiments of the present invention, such as "first" and "second", are only used to distinguish the objects being described and do not have any order or technical meaning.

[0021] The following combination Figure 1 The signal transmission method based on power line carrier of the present invention is described.

[0022] A first aspect of the present invention provides a signal transmission method based on a power line carrier, comprising: A first aspect provides a signal transmission method based on a power line carrier, comprising: S1. Obtaining a received candidate digital signal, analyzing the strength and stability of the candidate digital signal to obtain an optimal signal, and using the optimal signal as a signal source; Specifically, the following steps may be employed: S11: Using a MIMO antenna array to scan a three-dimensional spatial beam to obtain multiple candidate digital signals; the MIMO antenna array uses multiple antennas to simultaneously transmit and receive independent data streams, expanding single-channel transmission into multiple parallel transmissions. According to Shannon's formula, under power and bandwidth constraints, increasing the number of antennas can significantly improve channel capacity.

[0023] S12, then applying a blind source separation algorithm to perform interference elimination processing on each of the candidate digital signals; The following steps can be used to handle it: Establish a hybrid model: Assume that the device selection digital signal is a linear combination of the mixing matrix and the source signal, that is, X=AS, where A is the unknown matrix, S is the source signal, and X is the candidate digital signal; Signal preprocessing: A combination of discrete wavelet transform (DWT) and ensemble empirical mode decomposition (EEMD) is used to eliminate high-frequency noise and extract the essential modal components of the signal; Apply the ICA algorithm to maximize the non-Gaussian separation of signals; Adopting adaptive modified natural gradient algorithm, the step size and power factor are dynamically adjusted through the distance measurement function; Interference cancellation is performed based on step size and power factor.

[0024] S13 , performing signal strength detection on each candidate digital signal after the interference elimination process, and taking the candidate digital signal with the largest signal strength as the signal source.

[0025] S2. parse the NR protocol stack of the signal source to obtain architecture parameters of the signal source; The specific steps can be as follows: First, when extracting the PDCP layer data unit, deep packet inspection is performed to filter out interference data; deep packet inspection can be performed on the packet header and data, and the IPS intrusion prevention system is used to block the transmission of harmful data packets to complete the filtering of interference data.

[0026] Then, the service type features of the signal source data that has undergone deep packet inspection are extracted; the service types include: emergency type, priority type and normal type, among which the emergency type and priority type will be marked with special characters on the packet header. By identifying the special characters on the packet header, the service type of the data can be obtained.

[0027] Next, the extracted service type features are classified and sorted according to the QoS priority mapping table, and the architecture parameters of the signal source are determined according to the classification and sorting results.

[0028] The QoS priority mapping table can be formulated as follows: Prioritize the service types, assign priority numbers to the data of each service type in order, and establish a QoS priority mapping table in the order of the numbers, as shown in the following table: Traffic type Priority QoS policy Real-time video / audio 1 Ensure minimum bandwidth, low latency, and high packet loss tolerance Real-time gaming 2 Ensure medium bandwidth and low latency Important data transmission 3 Ensure a certain bandwidth and medium delay tolerance Normal web browsing 4 Use shared bandwidth, high latency tolerance e-mail 5 Use shared bandwidth, high latency tolerance S3. configuring the PLC modem according to the architecture parameters; Specifically, the input channel of the data service type in the PLC modem can be determined based on the data service type determined in the aforementioned manner; the PLC modem has multiple channels from top to bottom, each of which can output analog signals of different frequencies. Inputting different service types into different channels can avoid interference between data of different service types and affect the transmission effect.

[0029] Then, the order in which the data arrives determines the order in which it is processed by the PLC modem for digital-to-analog conversion. Each channel performs digital-to-analog conversion based on the order in which the data arrives, ensuring that data is not easily lost.

[0030] S4, the PLC modem performs signal conversion according to the configuration, converting the digital signal into an analog signal; S5. Acquire a wiring pattern and impedance of a power line for transmitting an analog signal, determine transmission parameters of the analog signal according to the wiring pattern and impedance, and transmit the analog signal in the power line according to the transmission parameters.

[0031] Specifically, the following method can be used: measure the power line reflection coefficient matrix by injecting a swept frequency test signal: In the single-phase wiring mode, the characteristic impedance is detected to be purely resistive at 50Hz. In the three-phase four-wire mode, three groups of impedance parameters are identified to be symmetrically distributed. When the line impedance Z is less than 200Ω, the high frequency band of 30-86Hz is activated and π / 4-DQPSK modulation is used. Otherwise, the low frequency band of 1-30HZ is used for transmission.

[0032] In this invention, 5G digital signals are effectively screened to obtain the strongest and most stable 5G signal as the signal source for transmission. This signal source is then effectively analyzed, enabling the PLC modem to quickly and accurately convert the digital signal into an analog signal suitable for transmission over power lines. Furthermore, the PLC modem and 5G digital signal are integrated into a single terminal, achieving miniaturization while meeting the requirements of 5G signal transmission.

[0033] In order to better improve the stability of analog signals transmitted over power lines, the present invention can monitor the working state of the power lines in real time to obtain the signal-to-noise ratio (SNR) of the power lines. SNR= log 10 (P s / P n ) Among them, P s is the real-time noise, P n is the base noise within 1MHz bandwidth; Determine the gain of the analog signal according to the signal-to-noise ratio, and adjust the strength of the analog signal transmitted via the power line using a PLC modem according to the gain. The gain is obtained as follows: (1) Calculate the error signal e(t): e(t) = SNR ref −SNR (t), SNR ref is the reference signal-to-noise ratio, SNR (t) is the signal-to-noise ratio at the current moment, (2) Generate control output value u(t): ‌u(t) = , e(t) is the current error value, ‌K p is the proportional gain coefficient, k i is the integral gain coefficient, k dis the differential gain coefficient, (3) Gain (dB): Gain (dB) = 20*log 10 (u(t) / V ref ), V ref is the reference voltage.

[0034] A second aspect of the present invention provides a signal transmission device based on a power line carrier, comprising: The signal acquisition module 10 is used to obtain the received candidate digital signals, analyze the strength and stability of the candidate digital signals, and obtain the optimal signal, which is used as the signal source; a signal processing module 20 configured to parse the NR protocol stack of the signal source, obtain architecture parameters of the signal source, and configure the PLC modem according to the architecture parameters; A PLC modem 30, configured to convert digital signals into analog signals according to the configuration; The analog electrical processing module 40 is used to obtain the wiring mode and impedance of the power line transmitting the analog signal, determine the transmission parameters of the analog signal according to the wiring mode and impedance, and determine the transmission parameters according to the transmission parameters; The power line 50 is used to transmit analog electrical signals to the user terminal. In the present invention, the user terminal is equipped with an analog-to-digital converter to convert the analog signals transmitted by the power line into digital signals for use.

[0035] Furthermore, to monitor the power line's operating status in real time and prevent the line from failing to properly transmit analog signals due to noise and excessive output power, the signal transmission device of this application also includes a real-time detection module 60. This module is used to monitor the power line's operating status and adjust the analog signal transmission parameters accordingly. Specifically, when the power line is overloaded, its temperature rises, and its impedance increases, secondary noise reduction is required to improve transmission performance.

[0036] The third aspect of the present invention is as follows Figure 3 As shown, a computer device 70 is provided, including a memory 72, a processor 71, and a computer program 73 stored in the memory 72 and executable on the processor 71. When the processor 71 executes the computer program 73, the steps of the data transmission method in the above-mentioned embodiment are implemented. To avoid repetition, they are not described here. Alternatively, when the processor 71 executes the computer program 73, the functions of each module in the above-mentioned embodiment of the signal transmission device based on the power line carrier are implemented. To avoid repetition, they are not described here.

[0037] In a fourth aspect, the present invention provides a readable storage medium storing a computer program 73. When executed by a processor 71, the computer program 73 implements the steps of the data transmission method described in the above embodiment. To avoid repetition, these steps are not described here. Alternatively, when the processor 71 executes the computer program 73, the functions of the modules in the above embodiment of the data transmission device are implemented. To avoid repetition, these steps are not described here.

[0038] Those skilled in the art will understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided by the present invention may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM, Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct RAMbus dynamic RAM (DRDRAM), and RAMbus dynamic RAM (RDRAM).

[0039] Those skilled in the art will clearly understand that for the sake of convenience and brevity in description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional modules, sub-modules and units as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A signal transmission method based on power line carrier, characterized in that: include: Acquire the received candidate digital signal, analyze the strength and stability of the candidate digital signal, and obtain an optimal signal, wherein the optimal signal is used as a signal source; Parsing the NR protocol stack of the signal source to obtain architecture parameters of the signal source; configuring the PLC modem according to the architecture parameters; The PLC modem performs signal conversion according to the configuration to convert the digital signal into an analog signal; A wiring pattern and impedance of a power line for transmitting an analog signal are obtained, transmission parameters of the analog signal are determined according to the wiring pattern and impedance, and the analog signal is transmitted in the power line according to the transmission parameters.

2. The signal transmission method based on power line carrier according to claim 1, characterized in that: The step of obtaining the received candidate digital signal, analyzing the strength and stability of the candidate digital signal to obtain an optimal signal, wherein the optimal signal is used as a signal source, includes: Using a MIMO antenna array to scan a three-dimensional spatial beam to obtain a plurality of candidate digital signals; Applying a blind source separation algorithm to perform interference elimination processing on each of the candidate digital signals; Signal strength detection is performed on each candidate digital signal after the interference elimination process, and the candidate digital signal with the largest signal strength is used as the signal source.

3. The signal transmission method based on power line carrier according to claim 1, characterized in that: The parsing the NR protocol stack of the signal source to obtain the architecture parameters of the signal source includes: When extracting PDCP layer data units, deep packet inspection is performed to filter out interference data; Extract service type features from signal source data that has undergone deep packet inspection; According to the QoS priority mapping table, the extracted service type features are classified and sorted; The architecture parameters of the signal source are determined according to the classification and sorting results.

4. The signal transmission method based on power line carrier according to claim 3, characterized in that: Configuring the PLC modem according to the architecture parameters includes: Determining an input channel of the data service type in the PLC modem according to the data service type in the architecture parameter; The order in which the data enters the PLC modem for digital-to-analog conversion is determined based on the order in which the data arrives.

5. The signal transmission method based on power line carrier according to claim 1, characterized in that: The obtaining of a wiring pattern and an impedance of a power line for transmitting an analog signal, determining transmission parameters of the analog signal according to the wiring pattern and the impedance, and transmitting the analog signal in the power line according to the transmission parameters includes: Measure the power line reflection coefficient matrix by injecting a swept frequency test signal: In the single-phase wiring mode, the characteristic impedance is detected to be purely resistive at 50Hz. In the three-phase four-wire mode, three groups of impedance parameters are identified to be symmetrically distributed. When the line impedance Z is less than 200Ω, the high frequency band of 30-86Hz is activated and π / 4-DQPSK modulation is used. Otherwise, the low frequency band of 1-30HZ is used for transmission.

6. The signal transmission method based on power line carrier according to claim 1, characterized in that: After acquiring a wiring pattern and an impedance of a power line for transmitting an analog signal, determining transmission parameters of the analog signal based on the wiring pattern and the impedance, and transmitting the analog signal in the power line based on the transmission parameters, the method further includes: Monitor the working status of the power line in real time to obtain the signal-to-noise ratio (SNR) of the power line. SNR= onion 10 (P s / P n ) Among them, P s is the real-time noise, P n is the base noise within 1MHz bandwidth; Determine the gain of the analog signal according to the signal-to-noise ratio, and adjust the strength of the analog signal transmitted via the power line using a PLC modem according to the gain. The gain is obtained in the following manner: (1) Calculate the error signal e(t): e(t) = SNR ref −SNR (t), SNR ref is the reference signal-to-noise ratio, SNR (t) is the signal-to-noise ratio at the current moment, (2) Generate control output value u(t): ‌u(t) = , e(t) is the current error value, ‌K p is the proportional gain coefficient, k i is the integral gain coefficient, k d is the differential gain coefficient, (3) Gain (dB): Gain (dB) = 20*log 10 (u(t) / V ref ), V ref is the reference voltage.

7. A signal transmission device based on power line carrier, comprising: A signal acquisition module is used to obtain the received candidate digital signals, analyze the strength and stability of the candidate digital signals, and obtain an optimal signal, which is used as a signal source; a signal processing module, configured to parse the NR protocol stack of the signal source, obtain architecture parameters of the signal source, and configure the PLC modem according to the architecture parameters; A PLC modem, configured to perform signal conversion according to the configuration, converting digital signals into analog signals; an analog electrical processing module, configured to obtain a wiring pattern and an impedance of a power line for transmitting an analog signal, determine transmission parameters of the analog signal according to the wiring pattern and the impedance, and determine transmission parameters of the analog signal according to the transmission parameters; Power lines are used to transmit analog electrical signals to the user terminals.

8. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the signal transmission method based on power line carrier according to any one of claims 1 to 6 is implemented.

9. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the signal transmission method based on power line carrier according to any one of claims 1 to 6 is implemented.

Images