Long-distance signal repeater and stable signal transmission method based on same

Abstract

The invention discloses a long-distance signal repeater and a stable signal transmission method based on the same, and relates to the technical field of repeaters, and the signal repeater comprises a signal input interface, a signal amplification module, a signal output interface and a power supply module. According to the repeater, a unique signal amplification algorithm is adopted, the transmission quality of signals is effectively improved, the transmission quality index of each signal transmission path is calculated, the transmission quality of each path is comprehensively and accurately evaluated, the limitation of single index evaluation is avoided, and the reliability of the repeater is improved. The optimal signal transmission path is selected according to the principle that the transmission quality is highest and the transmission delay is minimum, signals are ensured to be transmitted along the optimal path all the time in the network, the problems of quality reduction, congestion and the like of the current transmission path are found, the transmission path can be adjusted in time, and a new optimal path can be selected. Influences on communication caused by network faults or performance reduction are effectively avoided, and continuity and stability of network communication are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of repeaters, and particularly to a long-distance signal repeater and a signal stable transmission method based on the same. Background Art

[0002] A repeater is a network device mainly used to extend the signal range and enhance the signal strength in a local area network or a wide area network to maintain the integrity and reliability of data transmission. In network communication, data signals gradually attenuate during transmission. When the signal attenuates to a certain extent, the receiving end may not be able to correctly identify the data, resulting in data transmission errors. The repeater can receive these weak signals, amplify them and then send them out, thereby extending the signal transmission distance. By amplifying the signal, it can maintain good signal quality during long-distance transmission and reduce the impact of signal attenuation on data transmission. By amplifying and shaping the signal, the repeater can reduce the bit error rate caused by noise and interference and improve the reliability and rate of data transmission. With the rapid development of network technology, network communication is increasingly widely used in various fields.

[0003] In modern communication and electronic technologies, long-distance signal transmission is an important issue. With the development of technology, the requirements for the quality and stability of signal transmission are getting higher and higher. Traditional signal repeaters have problems such as poor signal amplification effect, high noise coefficient, and low signal gain during long-distance transmission. At the same time, traditional signal transmission methods are also difficult to effectively avoid congestion and interference, resulting in low signal transmission efficiency and stability. Therefore, it is necessary to propose a long-distance signal repeater and a signal stable transmission method based on the same to solve the problems in the prior art. Summary of the Invention

[0004] The purpose of the present invention is to make up for the deficiencies of the prior art and provide a long-distance signal repeater and a signal stable transmission method based on the same. It can effectively improve the signal gain and reduce the noise coefficient, thereby significantly improving the signal transmission quality. The signal transmission method can automatically select the best signal transmission path, avoid congestion and interference, and improve the signal transmission efficiency and stability.

[0005] To solve the above technical problems, the present invention provides the following technical solution: A long-distance signal repeater, which includes: a signal input interface, a signal amplification module, a signal output interface, and a power supply module;

[0006] The signal input interface is used to receive an input signal;

[0007] The signal amplification module is used to efficiently amplify the input signal. By detecting the intensity and frequency of the input signal, it selects appropriate amplification methods and parameters according to the detection results, and monitors and adjusts the signal in real time during the amplification process to maintain the integrity and accuracy of the signal;

[0008] The signal output interface is used to output the amplified signal;

[0009] The power supply module provides power for the repeater.

[0010] Further, the specific implementation steps of the signal amplification module include:

[0011] The signal amplification module first samples the input signal. The sampling frequency is determined according to the frequency range of the input signal and the requirements of subsequent processing. Defining the sampling frequency as fs and the input signal as x(t), the sampled discrete signal is x(n) = x(t)|t = n / f s , where n is the sampling point serial number;

[0012] Perform a fast Fourier transform (FFT) on the sampled signal to obtain the signal spectrum X(k), where k = 0, 1, 2,..., N - 1, N is the number of points of the FFT, and the calculation formula of the FFT is:

[0013] Analyze the signal spectrum to determine the main frequency components and intensity of the signal. According to the frequency and intensity information of the signal, calculate the initial amplification parameter A 0 and the frequency compensation parameter fc. The calculation formula of the initial amplification parameter A 0 is: A 0 = α·max(|X(k)|), where α is a constant determined according to actual experience. The calculation formula of the frequency compensation parameter f c is: f c = f 0 + β·(f center - f 0 ), where f 0 is the nominal center frequency of the signal, f center is the center frequency of the actual signal spectrum, and β is an adjustment coefficient.

[0014] Furthermore, the specific implementation steps of the signal amplification module also include:

[0015] According to the calculated initial amplification parameter and frequency compensation parameter, amplify and frequency-compensate the signal. The amplified signal is

[0016] During the amplification process, monitor the power and signal-to-noise ratio of the signal in real time. The calculation formula of the signal power is: The calculation of the signal-to-noise ratio is achieved by estimating the signal power and the noise power, where P n is the noise power, which is obtained by estimating the background noise of the signal;

[0017] According to the monitored signal power and the signal-to-noise ratio, the amplification parameters and the frequency compensation parameters are dynamically adjusted to maintain the integrity and accuracy of the signal.

[0018] A signal stable transmission method based on a long-distance signal repeater, the method comprising the following steps:

[0019] Through a network monitoring device, obtain the connection relationships and signal quality parameters of each node in the network, including signal strength and signal-to-noise ratio, and store them in a database;

[0020] According to the collected network topology information and signal quality data, calculate the transmission quality indicators of each signal transmission path;

[0021] According to the calculated transmission quality indicators, select the best signal transmission path according to the principles of the highest transmission quality and the minimum transmission delay;

[0022] During the signal transmission process, monitor the changes in the network status and signal quality in real time, and when it is found that the quality of the current transmission path deteriorates and congestion problems occur, adjust the transmission path in a timely manner and select a new best path.

[0023] Further, through a network monitoring device, obtain the connection relationships and signal quality parameters of each node in the network, the method comprising:

[0024] According to the network scale and topology, select network monitoring devices, including network probes and traffic analyzers;

[0025] Deploy network monitoring devices at key nodes and locations in the network. For a wired network, connect the monitoring device to the mirror port of the network switch. For a wireless network, reasonably distribute the monitoring devices within the coverage area to obtain signal quality information at different locations;

[0026] According to the signal quality parameters and connection relationship information to be collected, perform corresponding parameter settings on the network monitoring device, including setting the measurement range of the signal strength, the calculation method of the signal-to-noise ratio, and the time interval of data acquisition;

[0027] Start the network monitoring device, collect the signal quality parameters and connection relationship information of each node in the network, and perform preliminary preprocessing on the collected data;

[0028] The monitoring device transmits the preprocessed data to the database server via a network connection. On the database server side, a dedicated data table is established to store the collected network information.

[0029] Before storing the data in the database, data validation is performed. For the discovered error and abnormal data, corrections and markings are made in a timely manner. At the same time, the network information in the database is updated regularly to reflect the dynamic changes in the network topology and signal quality.

[0030] Furthermore, according to the collected network topology information and signal quality data, the transmission quality indicators of each signal transmission path are calculated. The method includes:

[0031] Obtain the collected network topology information and signal quality data from the database. The network topology is represented by a graph G=(V, E), where V is the set of nodes and E is the set of edges. Each edge represents the connection between two nodes. The signal quality data includes the signal strength S i and the signal-to-noise ratio SNR i of each node, as well as some basic information about the links between nodes.

[0032] For any signal transmission path P=(v 1 , v 2 , …, v n ), where v i ∈V represents the nodes on the path. The signal strength S P of the path is calculated by the weighted sum of the signal strengths of the nodes on the path. Define the link weight from node v i to node v i+1 as w i(i+1) . Then the calculation formula for the path signal strength is:

[0033] Similarly, for path P, the signal-to-noise ratio SNR P on the path is calculated by a certain combination method of the signal-to-noise ratios of the links on the path. Define the link signal-to-noise ratio from node v i to node v i+1 as SNR ij . The calculation method is to take the minimum value of the signal-to-noise ratios of the links on the path as the signal-to-noise ratio of the path, that is: SNR P =min 1≤i≤n-1 SNR i(i+1) ;

[0034] The transmission delay is the time required for the signal to propagate on the transmission path. For a wired link, the transmission delay mainly depends on the link length and the propagation speed of the signal in the link. Define the propagation speed of the signal in the wired link as v. Then for node v i to node v i+1Link transmission delay

[0035] Furthermore, according to the collected network topology information and signal quality data, calculate the transmission quality indicators of each signal transmission path. The method further includes:

[0036] The total transmission delay T of path P P is the sum of the transmission delays of each link on the path in the above steps, that is:

[0037] To comprehensively consider factors such as signal strength, signal-to-noise ratio, and transmission delay, define a comprehensive transmission quality indicator Q P , and perform a weighted sum of these three indicators, that is: Q P =λ 1 ·S P +λ 2 ·SNR P -λ 3 ·T P , where λ 1 , λ 2 , λ 3 are positive weight coefficients.

[0038] Furthermore, according to the calculated transmission quality indicators, select the best signal transmission path according to the principles of the highest transmission quality and the smallest transmission delay. The method includes:

[0039] Obtain all signal transmission paths and their corresponding transmission quality indicators from the calculation steps, including signal strength S P , signal-to-noise ratio SNR P , transmission delay T P and comprehensive transmission quality indicator Q P ;

[0040] Perform a preliminary screening according to the principle of the smallest transmission delay. Define a maximum allowable transmission delay threshold T max , and retain all paths with transmission delay T P less than or equal to T max , and eliminate paths with excessive transmission delays;

[0041] For the paths that pass the preliminary screening, further evaluate and rank them according to the principle of the highest transmission quality. The evaluation is based on the comprehensive transmission quality indicator Q P ;

[0042] After sorting, the path ranked first is the best signal transmission path. If there are multiple paths with the same and optimal comprehensive transmission quality indicators, determine the final best path according to other secondary factors and random selection methods;

[0043] If no path satisfying the conditions is found after the above steps, corresponding measures need to be taken according to the specific situation, such as adjusting the maximum allowable transmission delay threshold, re-evaluating the network topology and signal quality data, and finding other solutions.

[0044] Furthermore, during the signal transmission process, the network status and signal quality changes are monitored in real time. When it is found that the quality of the current transmission path deteriorates and congestion problems occur, the transmission path is adjusted in a timely manner and a new optimal path is selected. The method includes:

[0045] Use network monitoring devices to continuously monitor the currently used signal transmission path in real time. The monitored parameters include signal strength, signal-to-noise ratio, transmission delay, and network congestion metrics, and set the monitoring time interval.

[0046] For the real-time data collected, according to the preset thresholds and rules, judge whether the quality of the current transmission path deteriorates and congestion occurs. If the value of the comprehensive transmission quality index Q P is lower than the preset threshold, it is determined that the quality of the transmission path has deteriorated.

[0047] Furthermore, during the signal transmission process, the network status and signal quality changes are monitored in real time. When it is found that the quality of the current transmission path deteriorates and congestion problems occur, the transmission path is adjusted in a timely manner and a new optimal path is selected. The method also includes:

[0048] Once it is determined that the quality of the current transmission path deteriorates and congestion occurs, immediately trigger the path adjustment mechanism.

[0049] After triggering the path adjustment mechanism, according to the current network topology and real-time signal quality data, re-execute the previous calculation and selection steps to determine the new optimal transmission path.

[0050] After determining the new optimal transmission path, switch the signal transmission to the new path through network configuration and routing protocol methods.

[0051] After completing the path switching, update the information about the signal transmission path in the database, record the new optimal path and related transmission quality parameters. At the same time, reset the monitoring status to monitor the new path, and continue to monitor the network status and signal quality changes in real time.

[0052] Compared with the prior art, the long-distance signal repeater and the signal stable transmission method based on it have the following beneficial effects:

[0053] The repeater of the present invention adopts a unique signal amplification algorithm, effectively improving the transmission quality of signals. It calculates the transmission quality indicators of each signal transmission path, comprehensively and accurately evaluates the transmission quality of each path, avoids the limitations of single-index evaluation, and selects the best signal transmission path according to the principles of the highest transmission quality and the minimum transmission delay, ensuring that the signal always transmits along the optimal path in the network. When it detects problems such as a decline in the quality of the current transmission path and congestion, it can timely adjust the transmission path and select a new best path, effectively avoiding the impact on communication caused by network failures or performance degradation, and ensuring the continuity and stability of network communication.

[0054] Other advantages, objectives, and features of the present invention will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0056] Figure 1 It is a schematic structural diagram of a long-distance signal repeater;

[0057] Figure 2 It is a flowchart of a signal stable transmission method based on a long-distance signal repeater. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0058] The following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0059] Embodiment 1

[0060] To solve the above technical problems, the present invention provides the following technical solutions: a long-distance signal repeater, which includes: a signal input interface, a signal amplification module, a signal output interface, and a power supply module.

[0061] The signal input interface is used to receive input signals. It adopts a high-sensitivity interface circuit to ensure stable reception of weak input signals and has good anti-interference ability.

[0062] A signal amplification module is used to efficiently amplify the input signal by adopting a unique signal amplification algorithm. This algorithm detects the intensity and frequency of the input signal, selects appropriate amplification methods and parameters according to the detection results, and monitors and adjusts the signal in real time during the amplification process to maintain the integrity and accuracy of the signal, while having a lower noise coefficient and a higher signal gain.

[0063] The signal amplification module first samples the input signal, and the sampling frequency is determined according to the frequency range of the input signal and the requirements of subsequent processing. Define the sampling frequency as f s . If the input signal is x(t), then the sampled discrete signal is x(n) = x(t)|t = n / f s . Where n is the sampling point serial number. Perform a fast Fourier transform (FFT) on the sampled signal to obtain the signal spectrum X(k), where k = 0, 1, 2,..., N - 1, and N is the number of points of the FFT. The calculation formula of the FFT is: Analyze the signal spectrum to determine the main frequency components and intensity of the signal. According to the frequency and intensity information of the signal, calculate the initial amplification parameter A 0 and the frequency compensation parameter f c . The initial amplification parameter A 0 is determined by using an empirical formula and according to a preset mapping table. The calculation formula of the initial amplification parameter A 0 is: A 0 = α·max(|X(k)|), where α is a constant determined according to actual experience. The frequency compensation parameter f c is determined according to the center frequency of the signal and the preset frequency deviation range. The calculation formula of the frequency compensation parameter f c is: f c = f 0 + β·(f center - f 0 ), where f 0 is the nominal center frequency of the signal, f center is the center frequency of the actual signal spectrum, and β is an adjustment coefficient. According to the calculated initial amplification parameter and frequency compensation parameter, amplify and frequency-compensate the signal. The amplified signal is

[0064] During the amplification process, monitor the power and signal-to-noise ratio of the signal in real time. The calculation formula of the signal power is: The calculation of the signal-to-noise ratio is achieved by estimating the signal power and the noise power. Where P nis the noise power, which is obtained by estimating the background noise of the signal. According to the monitored signal power and signal-to-noise ratio, the amplification parameters and frequency compensation parameters are dynamically adjusted to maintain the integrity and accuracy of the signal. The specific adjustment strategy can be designed according to the actual situation. For example, when the signal power exceeds the preset threshold, the amplification parameter is appropriately reduced; when the signal-to-noise ratio is lower than the preset threshold, the frequency compensation parameter is adjusted to reduce the influence of noise.

[0065] The signal output interface is used to output the amplified signal. An interface circuit with strong output driving ability is selected to ensure that the amplified signal can be stably and accurately output and is matched with the subsequent transmission link or receiving device.

[0066] The power supply module provides power for the repeater. A power supply design with high efficiency and low noise is adopted to provide a stable and reliable power supply for the repeater. At the same time, necessary filtering and voltage stabilization measures are taken to reduce the influence of power supply noise on the signal amplification module.

[0067] Embodiment 2

[0068] This embodiment further describes in detail the signal stable transmission method of the long-distance signal repeater on the basis of Embodiment 1.

[0069] A signal stable transmission method based on a long-distance signal repeater, the method comprising the following steps:

[0070] First, through network monitoring devices, obtain the connection relationships and signal quality parameters of each node in the network, including signal strength and signal-to-noise ratio, and store them in a database.

[0071] According to the network scale and topology, select network monitoring devices, including network probes and traffic analyzers. These devices should have high-precision signal detection capabilities, be able to accurately obtain the signal strength, signal-to-noise ratio and other quality parameters of each node in the network, as well as the connection relationship information between nodes. Deploy network monitoring devices at key nodes and positions in the network to ensure that the installation positions of the devices are reasonable, can comprehensively cover the network, and will not interfere with the normal operation of the network. For wired networks, connect the monitoring devices to the mirror port of the network switch to obtain all network traffic data flowing through the switch. For wireless networks, reasonably distribute the monitoring devices within the coverage area to obtain signal quality information at different positions.

[0072] According to the signal quality parameters and connection relationship information to be collected, corresponding parameter settings are made for the network monitoring device, including setting the measurement range of signal strength, the calculation method of signal-to-noise ratio, and the time interval of data acquisition. At the same time, ensure that the communication settings between the monitoring device and the database are correct so that the collected data can be transmitted to the database in time for storage. Start the network monitoring device to collect the signal quality parameters and connection relationship information of each node in the network. The monitoring device performs data acquisition at the preset time interval and conducts preliminary preprocessing on the collected data, such as removing outliers and data format conversion. The preprocessed data will be temporarily stored in the local memory of the monitoring device and wait to be transmitted to the database.

[0073] The monitoring device transmits the preprocessed data to the database server through the network connection. The data transmission can be in the form of real-time transmission or scheduled batch transmission, which is specifically selected according to the network conditions and the amount of data. On the database server side, a special data table is established to store the collected network information, including node identification, signal strength, signal-to-noise ratio, and connection relationship fields. Ensure that the database has sufficient storage space and performance to handle the storage and query requirements of a large amount of data. Before storing the data in the database, perform data verification to ensure the accuracy and integrity of the data. Verification can be carried out by setting data verification rules, comparing with historical data, etc. For the discovered error and abnormal data, correct and mark them in time. At the same time, regularly update the network information in the database to reflect the dynamic changes of the network topology structure and signal quality. An appropriate update period can be set according to the actual situation of the network, such as every few minutes, hours, or a day, etc.

[0074] Then, according to the collected network topology structure information and signal quality data, calculate the transmission quality indicators of each signal transmission path. The transmission quality indicators include signal strength, signal-to-noise ratio, and transmission delay.

[0075] Obtain the collected network topology structure information and signal quality data from the database. The network topology structure is represented by a graph G=(V, E), where V is the set of nodes and E is the set of edges. Each edge represents the connection between two nodes. The signal quality data includes the signal strength S of each node i and the signal-to-noise ratio SNRi, as well as some basic information about the links between nodes, such as the link length L ij (for wired links) or propagation distance (for wireless links). For any signal transmission path P=(v 1 , v 2 , …, v n ), where v i ∈V represents the nodes on the path, and the signal strength S of the path PIt is calculated by the weighted sum of the signal strengths of each node on the path. Define the node v on the path i to node v i+1 The link weight is w i(i+1) , then the calculation formula for the path signal strength is: The link weight here can be set according to the actual situation. For example, it can be simply set to 1, or more complex calculations can be performed according to factors such as the quality and distance of the link. Similarly, for path P, the signal-to-noise ratio SNR P is calculated by a certain combination method of the signal-to-noise ratios of each link on the path. Define the signal-to-noise ratio of the link from node v i to node v i+1 as SNRij. The calculation method is to take the minimum value of the signal-to-noise ratios of each link on the path as the signal-to-noise ratio of the path, that is: SNR P = min 1≤i≤n-1 SNR i(i+1) .

[0076] The transmission delay is the time required for the signal to propagate on the transmission path. For a wired link, the transmission delay mainly depends on the link length and the propagation speed of the signal in the link. Define the propagation speed of the signal in the wired link as v (usually a known constant), then the link transmission delay from node v i to node v i+1 For a wireless link, the calculation of the transmission delay is more complex and requires considering various factors such as the propagation distance and environmental interference.

[0077] The total transmission delay T of path P P is the sum of the transmission delays of each link on the path in the above steps, that is: To comprehensively consider the factors of signal strength, signal-to-noise ratio, and transmission delay, define a comprehensive transmission quality index Q P , and perform a weighted sum of these three indicators, that is: Q P = λ 1 ·S P + λ 2 ·SNR P - λ 3 ·T P , where λ 1 , λ 2 , λ 3 are positive weight coefficients, and their values can be determined according to actual needs and the degree of emphasis on different indicators. By adjusting these weight coefficients, the sensitivity of the comprehensive transmission quality index to each factor can be flexibly changed.

[0078] ​Next, based on the calculated transmission quality indicators, select the best signal transmission path according to the principles of the highest transmission quality and the minimum transmission delay.

[0079] Obtain all signal transmission paths and their corresponding transmission quality indicators from the calculation steps, including the signal strength S P , signal-to-noise ratio SNR P , transmission delay T P and comprehensive transmission quality indicator Q P . Conduct a preliminary screening according to the principle of the minimum transmission delay. Define a maximum allowable transmission delay threshold T max . Retain all paths with transmission delay T P less than or equal to T max , and eliminate paths with excessive transmission delays. This can ensure that the selected paths are further evaluated on the premise of meeting the real-time requirements. For the paths that pass the preliminary screening, further evaluate and sort them according to the principle of the highest transmission quality. The evaluation is based on the comprehensive transmission quality indicator Q P .

[0080] If only a single factor of transmission quality is concerned, such as the maximum signal strength or the highest signal-to-noise ratio, the paths can be directly sorted according to the corresponding indicators. For example, sort the paths in descending order of signal strength, or sort them in descending order of signal-to-noise ratio. However, in order to consider the impact of multiple factors on transmission quality more comprehensively, the comprehensive transmission quality indicator Q P is usually used. Sort the paths in descending order according to the value of Q P , that is, the path with a larger Q P value ranks higher, indicating better transmission quality.

[0081] After sorting, the path ranked first is the best signal transmission path. If there are multiple paths with the same and optimal comprehensive transmission quality indicators, the final best path is determined according to other secondary factors and random selection. If no path that meets the conditions is found after the above steps (for example, the transmission delays of all paths exceed the maximum allowable threshold), corresponding measures need to be taken according to the specific situation, adjust the maximum allowable transmission delay threshold, re-evaluate the network topology structure and signal quality data, and find other solutions.

[0082] Finally, during the signal transmission process, monitor the changes in the network status and signal quality in real time. When it is found that the quality of the current transmission path deteriorates and congestion problems occur, adjust the transmission path in time and select a new best path.

[0083] Use network monitoring devices to continuously monitor the currently used signal transmission path in real time. The monitored parameters include signal strength, signal-to-noise ratio, transmission delay, and network congestion metrics. These parameters can be obtained by deploying probes at key nodes on the transmission path or using a network management system, and the monitoring time interval is set, for example, data collection is performed every few milliseconds or seconds to ensure that changes in network conditions and signal quality can be detected in a timely manner. For the collected real-time data, judge whether the quality of the current transmission path has deteriorated and congestion has occurred according to preset thresholds and rules. For example, if the signal strength is lower than a certain threshold, the signal-to-noise ratio is lower than the set value, the transmission delay exceeds the maximum allowable delay, or the network congestion metric exceeds a certain limit, it is considered that there is a problem with the transmission path. Considering that the comprehensive transmission quality index Q P is lower than the preset threshold, it is determined that the quality of the transmission path has deteriorated.

[0084] Once it is determined that the quality of the current transmission path has deteriorated and congestion has occurred, immediately trigger the path adjustment mechanism. The activation of the path adjustment mechanism can be achieved by sending an interrupt signal or triggering a specific event handler. After triggering the path adjustment mechanism, according to the current network topology and real-time signal quality data, re-execute the previous calculation and selection steps to determine a new optimal transmission path. This includes recalculating the transmission quality metrics of all possible paths and selecting according to the principles of the highest transmission quality and the smallest transmission delay. After determining the new optimal transmission path, switch the signal transmission to the new path through network configuration and routing protocol methods. The switching process should be as smooth as possible to reduce the impact on the ongoing signal transmission. For example, the method of first establishing a new path and then gradually switching the data traffic to the new path at an appropriate time can be adopted. After completing the path switching, update the information about the signal transmission path in the database, record the new optimal path and related transmission quality parameters. At the same time, reset the monitoring status to monitor the new path and continue to monitor the changes in network conditions and signal quality in real time to ensure that the signal can be transmitted stably and efficiently.

[0085] Through the above method, calculate the transmission quality metrics of each signal transmission path, comprehensively and accurately evaluate the transmission quality of each path, select the optimal signal transmission path according to the principles of the highest transmission quality and the smallest transmission delay, ensure that the signal always travels along the optimal path in the network, detect problems such as the deterioration of the quality of the current transmission path and congestion, and be able to adjust the transmission path in a timely manner and select a new optimal path.

[0086] It is obvious to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Thus, all changes that fall within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. A long distance signal repeater, characterized in that: The signal repeater comprises: a signal input interface, a signal amplification module, a signal output interface and a power supply module; The signal input interface is used to receive an input signal; The signal amplification module is used to efficiently amplify the input signal by detecting the strength and frequency of the input signal, selecting a suitable amplification method and parameters according to the detection results, and monitoring and adjusting the signal in real time during the amplification process to maintain the integrity and accuracy of the signal; The signal output interface is used to output the amplified signal; The power module provides power to the repeater.

2. A long distance signal repeater according to claim 1, characterized in that: The specific execution steps of the signal amplification module include: The signal amplification module first samples the input signal. The sampling frequency is determined according to the frequency range of the input signal and the requirements of subsequent processing. The sampling frequency is defined as f s , the input signal is x(t), then the discrete signal after sampling is x(n)=x(t)|t=n / f s , where n is the sampling point number; Perform fast Fourier transform FFT on the sampled signal to obtain the signal spectrum X(k), where k = 0, 1, 2, ..., N-1, N is the number of FFT points, and the FFT calculation formula is: Analyze the signal spectrum, determine the main frequency components and strength of the signal, and calculate the initial amplification parameter A0 and frequency compensation parameter f according to the frequency and strength information of the signal. c The calculation formula of the initial amplification parameter A0 is: A0 = α max (|X (k) |), where α is a constant determined based on actual experience, and the frequency compensation parameter f c The calculation formula is: c =f0+β·(f center -f0), where f0 is the nominal center frequency of the signal, f center is the center frequency of the actual signal spectrum, and β is an adjustment coefficient.

3. A long distance signal repeater according to claim 2, characterized in that: The specific execution steps of the signal amplification module also include: According to the calculated initial amplification parameters and frequency compensation parameters, the signal is amplified and frequency compensated. The amplified signal is: During the amplification process, the signal power and signal-to-noise ratio are monitored in real time. The signal power is calculated as follows: The signal-to-noise ratio is calculated by estimating the signal power and the noise power. Where P n is the noise power, obtained by estimating the background noise of the signal; According to the monitored signal power and signal-to-noise ratio, the amplification parameters and frequency compensation parameters are dynamically adjusted to maintain the integrity and accuracy of the signal.

4. A stable signal transmission method based on a long-distance signal repeater, characterized in that: The method comprises the following steps: Through the network monitoring equipment, the connection relationship and signal quality parameters of each node in the network, including signal strength and signal-to-noise ratio, are obtained and stored in the database; Calculate the transmission quality index of each signal transmission path based on the collected network topology information and signal quality data; According to the calculated transmission quality index, the best signal transmission path is selected according to the principle of highest transmission quality and minimum transmission delay; During the signal transmission process, the network status and changes in signal quality are monitored in real time. If the quality of the current transmission path deteriorates or congestion occurs, the transmission path can be adjusted in time to select a new optimal path.

5. A method for stable signal transmission based on a long-distance signal repeater according to claim 4, characterized in that: The connection relationship and signal quality parameters of each node in the network are obtained through a network monitoring device. The method includes: Select network monitoring equipment, including network probes and traffic analyzers, based on network size and topology; Deploy network monitoring devices at key nodes and locations in the network. For wired networks, connect the monitoring devices to the mirror port of the network switch. For wireless networks, reasonably distribute the monitoring devices in the coverage area to obtain signal quality information at different locations. According to the signal quality parameters and connection relationship information that need to be collected, the corresponding parameters of the network monitoring equipment are set, including setting the measurement range of signal strength, the calculation method of signal-to-noise ratio and the time interval for data collection; Start the network monitoring equipment, collect the signal quality parameters and connection relationship information of each node in the network, and perform preliminary preprocessing on the collected data; The monitoring device transmits the pre-processed data to the database server through a network connection. On the database server side, a special data table is established to store the collected network information; Before data is stored in the database, data verification is performed, and any errors and abnormal data found are corrected and marked in a timely manner. At the same time, the network information in the database is updated regularly to reflect the dynamic changes in network topology and signal quality.

6. A stable signal transmission method based on a long-distance signal repeater according to claim 4, characterized in that: Calculating the transmission quality index of each signal transmission path according to the collected network topology information and signal quality data, the method includes: The collected network topology information and signal quality data are obtained from the database. The network topology is represented by a graph G = (V, E), where V is a set of nodes and E is a set of edges. Each edge represents a connection between two nodes. The signal quality data includes the signal strength S of each node. i and signal-to-noise ratio SNR i , and some basic information about the links between nodes; For any signal transmission path P=(v1,v2,…,v n ), where v i ∈V represents the nodes on the path, and the signal strength of the path is S P The signal strength of each node on the path is calculated by weighted summation, and the node v on the path is defined i To node v i+1 The link weight is w i(i+1) , then the calculation formula for the path signal strength is: Similarly, for path P, the signal-to-noise ratio SNR on the path P The signal-to-noise ratio of each link on the path is calculated by a certain combination of methods, and the node v is defined i To node v i+1 The link signal-to-noise ratio is SNR ij The calculation method is to take the minimum value of the signal-to-noise ratio of each link on the path as the signal-to-noise ratio of the path, that is: SNR P =min 1≤i≤n-1 SNR i(i+1) ; Transmission delay is the time required for a signal to propagate along a transmission path. For a wired link, transmission delay mainly depends on the link length and the signal propagation speed in the link. The signal propagation speed in a wired link is defined as v, then node v i To node v i+1 Link transmission delay 7. A long-distance signal repeater and a stable signal transmission method based thereon according to claim 6, characterized in that: Calculating the transmission quality index of each signal transmission path according to the collected network topology information and signal quality data, the method further includes: The total transmission delay T of path P P is the sum of the transmission delays of each link on the path in the above steps, that is: In order to comprehensively consider the signal strength, signal-to-noise ratio and transmission delay factors, a comprehensive transmission quality index Q is defined. P , the weighted sum of these three indicators is: Q P =λ1·S P +λ2·SNR P -λ3·T P , where λ1, λ2, and λ3 are positive weight coefficients.

8. The method for stable signal transmission based on a long-distance signal repeater according to claim 4, characterized in that: According to the calculated transmission quality index, selecting the best signal transmission path according to the principle of highest transmission quality and minimum transmission delay, the method includes: Obtain all signal transmission paths and their corresponding transmission quality indicators from the calculation step, including signal strength S P , signal-to-noise ratio SNR P , transmission delay T P and comprehensive transmission quality index Q P ; Perform preliminary screening based on the principle of minimum transmission delay and define a maximum allowable transmission delay threshold T max , delaying all transmissions by T P Less than or equal to T max The paths with the longest transmission delay are retained, and the paths with the longest transmission delay are eliminated. For the paths that pass the initial screening, they are further evaluated and ranked according to the principle of highest transmission quality. The evaluation is based on the comprehensive transmission quality indicator Q P conduct; After sorting, the path ranked first is the best signal transmission path. If the comprehensive transmission quality indicators of multiple paths are the same and optimal, the final best path is determined based on other secondary factors and random selection; If no path that meets the conditions is found after the above steps, it is necessary to take appropriate measures according to the specific situation, adjust the maximum allowable transmission delay threshold, re-evaluate the network topology and signal quality data, and find other solutions.

9. The method for stable signal transmission based on a long-distance signal repeater according to claim 4, characterized in that: During the signal transmission process, the network status and signal quality changes are monitored in real time, and the quality of the current transmission path is found to be degraded and congestion occurs. The transmission path is adjusted in time and a new optimal path is selected. The method includes: Use network monitoring equipment to continuously monitor the signal transmission path in use in real time. The monitoring parameters include signal strength, signal-to-noise ratio, transmission delay, and network congestion indicators, and set the monitoring time interval; For the collected real-time data, the preset thresholds and rules are used to determine whether the quality of the current transmission path has declined or congestion has occurred. The comprehensive transmission quality index Q P If the value is lower than the preset threshold, it is determined that the transmission path quality has deteriorated.

10. A stable signal transmission method based on a long-distance signal repeater according to claim 9, characterized in that: During the signal transmission process, the network status and signal quality changes are monitored in real time, and if the quality of the current transmission path is reduced or congestion occurs, the transmission path is adjusted in time and a new optimal path is selected. The method also includes: Once it is determined that the quality of the current transmission path has deteriorated and congestion has occurred, the path adjustment mechanism is immediately triggered; After the path adjustment mechanism is triggered, the previous calculation and selection steps are re-executed to determine a new optimal transmission path based on the current network topology and real-time signal quality data; After determining the new best transmission path, the signal transmission is switched to the new path through network configuration and routing protocol; After the path switching is completed, the information about the signal transmission path in the database is updated, and the new optimal path and related transmission quality parameters are recorded. At the same time, the monitoring status is reset to monitor the new path, and the network status and signal quality changes continue to be monitored in real time.

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