Communication crosstalk suppression method and communication system

Abstract

The present disclosure relates to a communication crosstalk suppression method and a communication system. The method comprises: during communication crosstalk suppression, first acquiring communication state data of a target network, and, on the basis of the communication state data, determining whether crosstalk exists between the target network and other networks; when crosstalk exists between the target network and other networks, adjusting a communication signal of the target network on the basis of a first signal adjustment mode, and synchronously acquiring a communication quality parameter after signal adjustment; and if the communication quality parameter after communication signal adjustment does not satisfy a preset communication condition, adjusting the communication signal on the basis of a second signal adjustment mode. The first signal adjustment mode and the second signal adjustment mode are different adjustment modes.

Description

Communication crosstalk suppression methods and communication systems

[0001] Related applications

[0002] This disclosure claims priority to Chinese patent application filed on December 2, 2024, with application number 2024117630346, entitled "Communication Crosstalk Suppression Method and Communication System", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of communication transmission technology, and in particular to a communication crosstalk suppression method and communication system. Background Technology

[0004] Photovoltaic power generation is a technology that converts solar energy into electrical energy. As a renewable energy source, photovoltaic power generation helps meet the growing demand for electricity.

[0005] In photovoltaic systems, data acquisition devices and power converters can transmit data via power line communication (PLC) technology. PLC technology utilizes existing power line infrastructure to superimpose communication data with power signals for transmission. However, when communicating over power lines, data from different devices may interfere with each other, causing crosstalk and affecting transmission efficiency and quality. Traditional crosstalk suppression methods are relatively simple, using fixed suppression techniques that cannot be adjusted according to actual communication quality, resulting in poor flexibility. Summary of the Invention

[0006] Therefore, it is necessary to provide a communication crosstalk suppression method and communication system that can reduce crosstalk during PLC communication and improve the transmission rate of communication data while ensuring the transmission quality of communication data.

[0007] In a first aspect, this disclosure proposes a communication crosstalk suppression method, which includes:

[0008] Acquire the communication status data of the target network, and determine whether there is crosstalk between the target network and other networks based on the communication status data;

[0009] In the presence of crosstalk, the communication signal of the target network is adjusted according to the first signal adjustment method, and the communication quality parameters after the communication signal adjustment are obtained.

[0010] If the communication quality parameters do not meet the preset communication quality conditions, the communication signal is adjusted according to the second signal adjustment method; the first signal adjustment method and the second signal adjustment method are different.

[0011] In some embodiments, after adjusting the communication signal of the target network according to the first signal adjustment method and obtaining the communication quality parameters after the communication signal adjustment, the method further includes:

[0012] Determine whether crosstalk still exists between the adjusted target network and other networks;

[0013] If crosstalk still exists and the communication quality parameters meet the preset communication quality conditions, then the communication signal of the target network is adjusted repeatedly according to the first signal adjustment method.

[0014] In some embodiments, when the first signal adjustment method is used to adjust the signal strength, the communication signal of the target network is adjusted according to the first adjustment method, including: adjusting the transmission power of the communication signal so as to achieve a change in the communication signal strength through the change in transmission power;

[0015] or,

[0016] When the second signal adjustment method is used to adjust the signal strength, the communication signal of the target network is adjusted according to the second adjustment method, including: adjusting the transmission power of the communication signal so as to achieve a change in the communication signal strength through the change in transmission power.

[0017] In some embodiments, acquiring communication status data of the target network and determining whether crosstalk exists between the target network and other networks based on the communication status data includes:

[0018] In the target network, identify the target network device to be communicated with, and determine the status of the communication line between the target network device and the target network device;

[0019] If the communication line status indicates that the communication line with the target network device is occupied, then it is determined that there is crosstalk between the target network and other networks.

[0020] In some embodiments, determining the status of the communication line with the target network device includes:

[0021] Send test data to the target network device and receive the confirmation data frame returned after the test data is sent;

[0022] Identify and confirm the data frame, and obtain the line status identifier used to characterize the communication line status based on the data frame.

[0023] In some embodiments, the method further includes:

[0024] If network parameters corresponding to other networks are received, and the network identifiers of other networks are identified in the network parameters, it is determined that there is crosstalk between the target network and other networks. The network parameters are parameters that are periodically broadcast by each network.

[0025] In some embodiments, the method further includes:

[0026] If crosstalk always exists between the target network and other networks, reduce the frequency of data transmission in the target network.

[0027] In some embodiments, the method further includes, before adjusting the communication signal strength of the target network:

[0028] Determine the priority of the first piece of communication data to be transmitted;

[0029] If the priority is greater than the priority threshold, the data transmission frequency of other networks is reduced so that the first communication data is transmitted first.

[0030] In some embodiments, the method is used for a target device in a target network, where the target device is a network device or network control device in a communication system, and the method further includes:

[0031] Second communication data is obtained through the target network;

[0032] If the network identifier in the second communication data is different from the network identifier configured in the target device, and the network identifier in the second communication data does not belong to the valid identifier list of the target device, the second communication data will not be processed.

[0033] Secondly, this disclosure proposes a communication system comprising:

[0034] Several network devices, each connected to a photovoltaic module, are used to convert the electrical signals generated by the photovoltaic devices to obtain the converted electrical signals;

[0035] The network control device is connected to each network device and is used to collect the converted electrical signals sent by each network device and to collect the device data of each network device.

[0036] Power distribution equipment, connected to network control equipment, is used to connect the network control equipment to the power grid; wherein:

[0037] The communication system suppresses crosstalk between the target network and other networks in the communication system according to the communication crosstalk suppression method proposed in the first aspect above.

[0038] In some embodiments, the communication system further includes a wave-blocking device disposed between the network control device and the power distribution device, for isolating the communication signals of the target network from the communication signals of other networks.

[0039] The aforementioned communication crosstalk suppression method first acquires the communication status data of the target network and determines whether crosstalk exists between the target network and other networks based on the communication status data. If crosstalk exists between the target network and other networks, the communication signal of the target network is adjusted according to a first signal adjustment method, and the communication quality parameters after signal adjustment are acquired simultaneously. If the communication quality parameters after signal adjustment do not meet preset communication conditions, the communication signal is adjusted according to a second signal adjustment method. The first and second signal adjustment methods are different adjustment methods.

[0040] The communication crosstalk suppression scheme disclosed herein first adjusts the communication signal using a first signal adjustment method when crosstalk exists in the communication system. This reduces crosstalk between the target network and other networks by altering the target network's communication signal. Simultaneously, this crosstalk suppression method monitors communication quality parameters in real time during signal adjustment. If the adjusted communication quality parameters do not meet preset communication quality conditions, a second signal adjustment method, different from the first, is used to further adjust the communication signal. This crosstalk suppression method flexibly determines the signal adjustment method based on communication quality parameters and preset communication quality conditions. When the communication quality parameters adjusted using the first signal adjustment method do not meet the conditions, a second signal adjustment method can be selected to adjust the communication signal. This disclosure allows for the use of diverse suppression methods during crosstalk control, with the adjustment method determined based on communication quality parameters, offering good flexibility. This reduces the impact of crosstalk between the target network and other networks in the communication system on data transmission, improves the quality of communication signals during transmission, ensures reliable data transmission, and increases the transmission rate of communication signals. Furthermore, this crosstalk suppression method also considers monitoring communication quality parameters, improving the reliability of data transmission. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments or conventional technologies of this disclosure, the accompanying drawings used in the description of the embodiments or conventional technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the disclosed drawings without creative effort.

[0042] Figure 1 is a schematic diagram of a communication system structure according to an embodiment;

[0043] Figure 2 is a flowchart illustrating a communication crosstalk suppression method according to an embodiment;

[0044] Figure 3 is a flowchart illustrating a communication crosstalk suppression method according to another embodiment;

[0045] Figure 4 is a schematic diagram of the communication system structure according to another embodiment;

[0046] Figure 5 is a schematic diagram of communication crosstalk generation in another embodiment. Detailed Implementation

[0047] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this disclosure.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure.

[0049] It is understood that the terms "first," "second," etc., as used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the scope of this disclosure, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0050] It is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.

[0051] It is understandable that "at least one" refers to one or more, and "multiple" refers to two or more. "At least a part of an element" refers to part or all of an element.

[0052] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0053] A photovoltaic (PV) system mainly consists of PV modules, a power converter, a data acquisition unit, and a load. During operation, the PV modules convert solar radiation energy into electrical energy. The power converter converts the direct current (DC) generated by the PV modules into alternating current (AC), which is then used to power the load. The data acquisition unit is connected to both the power converter and the load to collect and transmit data from these devices, facilitating monitoring and real-time analysis. The data collected by the data acquisition unit can include operating parameters of the power converter, such as voltage, current, and power.

[0054] Power converters are electrical conversion devices used to transform electrical energy from one form to another, enabling energy transmission and control under different power requirements. Power converters can be microinverters (STAs, Stations), energy storage converters, etc. For example, a microinverter can convert DC power to AC power. The DC input of the microinverter is connected to a DC source (photovoltaic modules), and the AC output can be connected to the AC power grid and AC equipment.

[0055] In photovoltaic systems, data acquisition devices and power converters can transmit data via power line communication (PLC) technology. PLC technology utilizes existing power line infrastructure to superimpose communication data with power signals, thereby enabling data transmission.

[0056] Taking the communication system shown in Figure 1 as an example, this system uses PLC technology for communication, and the communication equipment is also electrical equipment. As shown in Figure 1, multiple photovoltaic systems exist under the same power distribution equipment, each photovoltaic system corresponding to a network. Power data and communication data between different networks are all collected at the power distribution equipment. The power distribution equipment has signal isolation capabilities to prevent interference between circuits.

[0057] Each network device is controlled and managed through the network control device of that network. A network includes one network control device and several network devices. The network control device is connected to each network device and monitors the network device data by collecting data from each network device.

[0058] As shown in Figure 1, the power distribution equipment includes two networks, Network A and Network B. Network A includes network control device A and n network devices: network device A1, network device A2, ..., network device An. Network control device A is connected to each network device through switches such as relays to control and collect data from each network device. It can be understood that the network devices in Network A are all photovoltaic modules used to convert solar energy into electrical energy to power load A.

[0059] It should be noted that load devices can also be directly connected to power distribution equipment to be supplied directly through the power grid. Taking network B in Figure 1 as an example, load B can be connected to various network devices in network B (such as network device B1, network device B2, ..., network device Bm) through network control device B, or it can be directly connected to the power distribution equipment. Load B can be supplied with electricity generated by photovoltaic modules acting as network devices, or it can be supplied directly through the power distribution equipment.

[0060] Furthermore, in the communication system shown in Figure 1, a network may correspond to a small-scale building such as a home, a company, a warehouse, or a restaurant. Generally, different networks under the same power distribution equipment can be different types of buildings within a preset distance range. For example, network A is the network of a home, and network B is the network of a shop within a preset distance range.

[0061] Specifically, in Figure 1, the network devices can be power converters in a photovoltaic system, the network control devices can be data acquisition devices in a photovoltaic system, and the power distribution equipment can be transformers in the power distribution network of a photovoltaic system. Because data communication in a photovoltaic system is based on mains power lines, communication data between different network control devices may flow between each other, generating crosstalk. PLC communication, however, uses collision detection and multiple access control (MATC). As long as data transmission occurs at any node on the communication bus, other nodes cannot transmit data simultaneously. In other words, crosstalk degrades the communication quality of the system and affects the efficiency of data transmission. Traditional crosstalk suppression methods also affect the quality of communication signals in the system, reducing the reliability of data transmission.

[0062] In some exemplary embodiments, as shown in Figure 2, a communication crosstalk suppression method is proposed, which can be used to suppress crosstalk when data transmission in a photovoltaic system generates crosstalk. This method includes steps 202 to 206. Wherein:

[0063] Step 202: Obtain the communication status data of the target network, and determine whether there is crosstalk between the target network and other networks based on the communication status data.

[0064] As described above, one power distribution device can correspond to multiple photovoltaic systems, and each photovoltaic system corresponds to a communication network. Each network includes a network control device and several network devices. In each network, the network control device is connected to each network device to transmit and interact with data. The network control device can be the data acquisition unit (COO, Concentrator) in the photovoltaic system disclosed herein, the network devices can be the power converters in the photovoltaic system, and the power distribution device can be a transformer connected to the mains power supply.

[0065] Because networks connected by the same power distribution equipment are often close together, crosstalk can easily occur during data transmission. To ensure the data transmission quality and efficiency of the target network, crosstalk needs to be suppressed. Before crosstalk suppression, crosstalk identification is necessary to determine whether crosstalk exists between the target network and other networks.

[0066] The target network represents the network from which data transmission is required. Other networks represent networks connected to the same power distribution equipment as the target network. Communication status data represents the communication connection status within the network, such as status identifiers indicating the connection status between network control devices and network devices, or identifiers indicating the data transmission results between network control devices and network devices. For example, if a connection status identifier indicates that a device is not connected, one possibility is that the device is not physically connected to the data transmission link. Another possibility is that crosstalk exists between the target network and other networks, causing the data transmission link between the network control device and the network device to be disconnected. If a data transmission identifier indicates that data transmission has failed, it may also be due to crosstalk between the target network and other networks, causing the data transmission between the network control device and the network device to fail.

[0067] For example, communication status data can be determined when a communication link is established between devices in the target network. For instance, when a data acquisition device needs to collect data from a power converter, it needs to establish a communication link with the power converter first. Based on the establishment of this communication link, the communication connection status between the data acquisition device and the power converter can be determined, thereby determining whether crosstalk exists in the current target network.

[0068] Step 204: In the presence of crosstalk, adjust the communication signal of the target network according to the first signal adjustment method, and obtain the communication quality parameters after the communication signal adjustment.

[0069] Communication quality parameters are parameters that characterize the quality of communication links in a communication system. These include link quality parameters expressed as Link Quality Indicators (LQI) or transmission quality parameters expressed as packet loss rate. LQI is a commonly used metric for measuring communication link quality. LQI is typically calculated based on factors such as received signal strength, noise interference, or packet loss rate, and the stability and reliability of the link are determined according to the quality of the received signal. When the communication link quality is good, the LQI value is high, corresponding to a strong communication signal, less signal interference, and stable data transmission; when the communication link quality is poor, the LQI value is low, corresponding to a weak communication signal, greater signal interference, and unstable data transmission.

[0070] The first signal adjustment method involves adjusting the communication signal to suppress crosstalk between the target network and other networks. For example, the first signal adjustment method could involve adjusting the strength, amplitude, phase, gain, bandwidth, modulation mode, etc., of the communication signal.

[0071] Modulation mode characterizes the way parameters such as signal amplitude and phase are modulated during data transmission. Different communication scenarios require different modulation modes. Please refer to Table 1, which shows the correspondence between modulation mode and signal-to-noise ratio (SNR). Generally, the more complex the modulation mode, the higher the transmission rate supported by the channel, and the higher the required SNR.

[0072] Table 1

[0073] Signal-to-noise ratio (SNR) is related to link quality parameters. Taking signal quality index (LQI) as an example, LQI is related to the received signal strength and signal quality; a higher LQI indicates better signal quality transmitted through the communication link. SNR represents the relationship between signal strength and noise level; a higher SNR indicates better signal strength and better communication quality. It can be understood that SNR is directly proportional to LQI, meaning a higher SNR corresponds to a higher LQI. For example, the empirical formula SNR = LQI / 4 - 10 can be used to convert between SNR and LQI.

[0074] Different networks require different Level Quality Indicators (LQIs) to parse communication data. A network with a high LQI cannot parse communication data from a network with a low LQI. This embodiment changes the LQI for communication data parsing by adjusting the modulation mode, thereby suppressing crosstalk. For example, if the current signal modulation mode in the target network is DBPSK, a signal-to-noise ratio (SNR) of at least 3.7 dB is required for data transmission. If crosstalk exists between the target network and other networks, the modulation mode of the communication signal is adjusted to DQPSK. With the change in modulation mode, the required SNR for data transmission becomes at least 6.7 dB, and the LQI required to parse the data transmission link also increases accordingly. As the LQI required for the target network to parse data increases, low-LQI communication data transmitted from other networks will not be parsed, and the crosstalk between the target network's communication signal and other networks is reduced.

[0075] This embodiment adjusts the communication signal of the target network according to the first signal adjustment method and acquires the communication quality parameters after the adjustment in real time. For example, the communication quality parameters can be determined by calculating parameters such as LQI value, packet loss rate, and noise interference during data transmission between the data acquisition unit and the power converter. For instance, when the network control device transmits data with the network device, the packet loss rate over a period of time is calculated, and the calculated packet loss rate is used as the communication quality parameter; alternatively, the LQI value can be directly acquired from the network control device and used as the communication quality parameter.

[0076] Step 206: If the communication quality parameters do not meet the preset communication quality conditions, the communication signal is adjusted according to the second signal adjustment method; the first signal adjustment method and the second signal adjustment method are different.

[0077] The preset communication quality conditions represent the minimum standards for normal communication between devices on the target network. Meeting the preset communication quality conditions means that the communication system meets basic communication quality standards. When the communication quality parameters of the target network after the communication signal do not meet the preset communication quality conditions, it means that data transmission between devices on the target network cannot be carried out normally, and the current adjustment method for the communication signal must be stopped.

[0078] The second signal adjustment method can also be to adjust the strength, amplitude, phase, gain, bandwidth, modulation mode, etc. of the communication signal. However, the second signal adjustment method differs from the first signal adjustment method. For example, while the first signal adjustment method adjusts the strength of the communication signal, the second signal adjustment method can adjust the modulation mode of the communication signal.

[0079] Adjustments to communication signals affect data transmission in a communication system; however, different signal adjustment methods have varying degrees of impact on communication quality parameters. When communication quality parameters are detected as not meeting preset communication quality conditions during signal adjustment, this embodiment can replace the first signal adjustment method with a second signal adjustment method to adjust the communication signal of the target network. This embodiment can flexibly employ diverse suppression methods for crosstalk suppression control based on communication quality parameters. If the communication quality parameters adjusted by the first signal adjustment method still do not meet the conditions, the second signal adjustment method is adjusted to continue adjusting the communication signal. This flexible crosstalk suppression approach ensures the reliability of data transmission in the target network.

[0080] For example, the first signal adjustment method adjusts the strength of the communication signal. When the communication signal strength is adjusted to a level that does not meet the preset communication quality conditions, if crosstalk still exists between the target network and other networks, continuing to reduce the communication signal strength using the first signal adjustment method will affect data transmission. Therefore, the signal adjustment method is changed, and the communication signal is further adjusted by changing its modulation method. After updating the modulation method, the signal-to-noise ratio required for data transmission increases, and the LQI required to resolve the data transmission link also increases accordingly. Since the LQI corresponding to the received communication data from other networks is low, after the target network's modulation mode changes and the required LQI for the target network increases, it will be unable to resolve the low-LQI crosstalk data from other networks. This suppresses crosstalk between the target network and other networks, giving the communication signal better noise and interference resistance and improving the reliability of data transmission in the target network.

[0081] The communication crosstalk suppression scheme disclosed herein first adjusts the communication signal of the target network using a first signal adjustment method when crosstalk exists in the communication system. This adjustment can be made by modifying the signal strength, amplitude, phase, gain, bandwidth, modulation mode, etc., to alter the target network's communication signal. As the target network's communication signal changes, crosstalk between the target network and other networks under the same power distribution equipment can be reduced, thus achieving communication crosstalk suppression. Furthermore, this embodiment simultaneously acquires the target network's communication quality parameters in real time while adjusting the target network's communication signal. If the adjusted communication quality parameters do not meet preset communication quality conditions, a second signal adjustment method is switched to further adjust the communication signal. The second signal adjustment method can also adjust the communication signal's strength, amplitude, phase, gain, bandwidth, modulation mode, etc. However, unlike the first signal adjustment method, the second signal adjustment method allows for flexible selection of the signal adjustment method based on the communication quality parameters and preset communication quality conditions. When the communication quality parameters adjusted by the first signal adjustment method do not meet the conditions, the second signal adjustment method can be selected to adjust the communication signal. This reduces the impact of crosstalk between the target network and other networks on data transmission, ensuring reliable data transmission while also guaranteeing the data transmission quality of the target network, thus improving data transmission efficiency. In this embodiment, diverse suppression methods can be used for crosstalk suppression control, and the adjustment method can be freely determined based on communication quality parameters, offering good flexibility.

[0082] In some further embodiments, after adjusting the communication signal of the target network according to the first signal adjustment method and obtaining the communication quality parameters after the communication signal adjustment, the method further includes: determining whether there is still crosstalk between the adjusted target network and other networks; if there is still crosstalk and the communication quality parameters meet the preset communication quality conditions, then the communication signal of the target network is adjusted again according to the first signal adjustment method.

[0083] For example, the strategy for adjusting the communication signal of the target network can be implemented multiple times. Taking the adjustment of the communication signal strength as an example, the signal strength can be adjusted multiple times, such as decreasing it by 1dB each time. After each adjustment, the communication quality parameters are obtained, and it is determined whether crosstalk still exists between the target network and other networks. If crosstalk still exists between the target network and other networks after the signal adjustment, and the communication quality parameters meet the preset communication quality conditions, the communication signal can be adjusted again in the same way, that is, the communication signal is still adjusted using the first signal adjustment method, until the adjusted communication quality parameters no longer meet the preset communication quality conditions. At this point, even if crosstalk still exists between the target network and other networks, the first signal adjustment method cannot be used for signal adjustment, and crosstalk suppression needs to be performed using other methods.

[0084] This embodiment can repeatedly use the first signal adjustment method to adjust the communication signal. After adjustment, it determines whether crosstalk exists and whether further adjustment using the current signal adjustment method is necessary. If crosstalk between networks still exists, and the current communication quality meets preset communication quality conditions, crosstalk suppression can be repeated using the current first signal adjustment method, improving the reliability of crosstalk suppression. In other words, this embodiment's crosstalk suppression method can repeatedly use the same signal adjustment method to adjust the communication signal multiple times before adjusting the signal adjustment method, so that adjusting the communication signal using a certain signal adjustment method can minimize communication crosstalk between the target network and other networks. This ensures both communication quality parameters and flexible adjustment methods.

[0085] In some other implementations, when signal adjustment continues according to the second signal adjustment method, the communication signal can be repeatedly adjusted using the second signal adjustment method even if crosstalk exists and the communication quality parameters meet the preset communication quality conditions. Furthermore, if the communication signal is adjusted to the point where the communication quality parameters no longer meet the preset communication quality conditions, a third signal adjustment method can be used to adjust the communication signal, and so on. It is understood that the third signal adjustment method is different from both the second and first signal adjustment methods. This embodiment can flexibly determine the adjustment method of the communication signal based on the communication quality parameters and preset communication quality conditions, reducing the impact of crosstalk between the target network and other networks on data transmission, ensuring reliable data transmission while also guaranteeing the data transmission quality of the target network, improving data transmission efficiency, and offering high flexibility and reliability.

[0086] In some specific embodiments, when the first signal adjustment method is used to adjust the signal strength, adjusting the communication signal of the target network according to the first adjustment method includes: adjusting the transmission power of the communication signal to achieve a change in the communication signal strength through a change in the transmission power; or, when the second signal adjustment method is used to adjust the signal strength, adjusting the communication signal of the target network according to the second adjustment method includes: adjusting the transmission power of the communication signal to achieve a change in the communication signal strength through a change in the transmission power.

[0087] Signal strength is data characterizing the quality of a signal in a communication system. Signal strength can be directly represented by the power of the communication signal, or indirectly by parameters such as signal quality, bit error rate, and signal coverage. This embodiment does not restrict the adjustment methods corresponding to the first and second signal adjustment methods, only requiring that the first and second adjustment methods are different. When either the first or second signal adjustment method involves adjusting the communication signal strength, the adjustment can be achieved by adjusting the transmission power of the communication signal in the target network. Generally, when suppressing communication crosstalk, the transmission power of the communication signal needs to be reduced to decrease the communication signal strength.

[0088] For example, when it is necessary to adjust the transmission power of a communication signal, the network control device controls itself and its connected network devices to reduce the signal transmission power, thereby reducing the communication signal strength. It can be understood that as the communication signal strength decreases, the distance between devices for data transmission shortens. The signal transmission power can be adjusted sequentially according to a set value, for example, reducing the transmission power by 2dB each time, and so on.

[0089] This embodiment uses a network control device to control itself and its connected network devices, changing the transmission power of the communication signal to reduce its signal strength. This reduces the impact of crosstalk between the target network and other networks on data transmission, improving communication quality. Since reducing signal strength affects transmission distance, this embodiment adjusts the transmission power in small, frequent adjustments to balance communication quality and crosstalk threshold, achieving crosstalk suppression with minimal signal strength adjustments and ensuring high-quality transmission.

[0090] In some other implementations, the communication signal strength can also be achieved by setting attenuators, wave traps, or other signal adjustment devices in the target network. This disclosure does not limit the method of adjusting the communication signal strength; in practical applications, the method of adjusting the communication signal strength can be flexibly determined according to specific needs.

[0091] In some other embodiments, step 202 involves obtaining communication status data of the target network and determining whether there is crosstalk between the target network and other networks based on the communication status data. This includes: identifying the target network device to be communicated with in the target network and determining the communication line status between the target network device and the target network device; if the communication line status indicates that the communication line between the target network device and the target network device is occupied, then it is determined that there is crosstalk between the target network and other networks.

[0092] The target network primarily involves data transmission between network control devices and network devices, specifically between the data acquisition unit and the power converter. A target network device represents a device within the target network with which the network control device needs to transmit data. When a network control device needs to transmit data with a particular network device, that network device is designated as the target network device, and a communication link is established between the network control device and the target network device.

[0093] The communication line status refers to the link connection status between the network control device and the target network device. By determining the communication line status between the network control device and the target network device, it can be determined whether data transmission can occur between them, and thus whether crosstalk exists between the target network and other networks. If the communication line status indicates that the communication line between the network control device and the target network device is occupied, data transmission cannot occur between them, and crosstalk is considered to exist between the target network and other networks. This embodiment identifies communication crosstalk by analyzing communication status data. The network control device can directly identify crosstalk in the received communication status data without additional judgment steps, making the operation simple and easy to implement.

[0094] In some specific embodiments, determining the communication line status with the target network device includes: sending test data to the target network device and receiving an acknowledgment data frame returned after the test data is sent; identifying the acknowledgment data frame and obtaining a line status identifier for characterizing the communication line status based on the acknowledgment data frame.

[0095] When constructing the target network, the network control device must first be networked with each network device. Once the network is established, when the network control device needs to transmit data with the target network device in the target network, a communication link is established with the target network device, and data transmission is performed based on this communication link.

[0096] Test data is data sent by the network control device when establishing a communication link with the target network device. Test data can be data to be transmitted or any data used for testing. An acknowledgment frame is a data frame received from the target network device after the network control device sends the test data. The acknowledgment frame includes information characterizing the connection or communication status between the target network device and the network control device. By identifying the acknowledgment frame, a line status identifier characterizing the communication line status can be obtained. The line status identifier is used to determine whether the communication line is normal, the communication node has not been found, or the communication line is occupied.

[0097] For example, when constructing the target network, the network control device and network devices are first networked together to obtain the network structure of the target network. When the network control device needs to transmit data, it first determines the target network device for data communication. After the target network device is determined, the network control device sends test data to the target network device and receives a confirmation data frame from the target network device after the test data is sent. By analyzing and identifying the confirmation data frame, a line status identifier representing the communication line status is obtained. This line status identifier can indicate the reason for the test data transmission failure. For example, the target network device cannot be found, or the communication line is occupied. If the target network device cannot be found, there may be an anomaly during network construction, meaning that the target network device is not included in the network structure. If the communication line is occupied, there may be crosstalk between the target network and other networks.

[0098] Furthermore, in the above embodiments, if the test data transmission fails, the test data can be repeatedly transmitted to verify the communication line status between the network control device and the target network device. If the communication line is occupied after multiple repetitions, it can be basically determined that there is crosstalk between the target network and other networks.

[0099] In some other embodiments, the method further includes: if network parameters corresponding to other networks are received and network identifiers of other networks are identified in the network parameters, then it is determined that there is crosstalk between the target network and other networks, and the network parameters are parameters periodically broadcast by each network.

[0100] As mentioned earlier, multiple networks exist under the same power distribution equipment, and each network corresponds to a network identifier, which can be called a PANID (Personal Area Network Identifier). In the communication system disclosed in this paper, each network periodically broadcasts its network parameters to update network data and ensure that all devices in the network are in normal working condition. The network parameters periodically broadcast by each network include the network identifier of the network itself.

[0101] Therefore, if a network obtains the network identifier of another network on its communication line, it indicates that the network's communication line is occupied, and crosstalk exists. In other words, crosstalk between a target network and other networks can be determined by analyzing and processing network broadcast data.

[0102] For example, if a target network receives its own network identifier from another network through periodic broadcast, it means that the target network's communication line can receive network parameters broadcast by other networks, that is, the target network's communication line is occupied by other networks, and there is communication crosstalk between the target network and other networks.

[0103] In some other embodiments, the method further includes reducing the frequency of data transmission in the target network if crosstalk always exists between the target network and other networks.

[0104] The data transmission frequency can be determined by the data transmission period. The longer the data transmission period, the lower the data transmission frequency; the shorter the data transmission period, the higher the data transmission frequency.

[0105] Crosstalk between the target network and other networks can be represented as the target network's communication lines being occupied. That is, when a device in the target network needs to transmit data, data from another network is being transmitted on that communication line. Therefore, when uncontrollable crosstalk consistently exists between the target network and other networks, the data transmission cycle in the target network can be increased by using network control devices to reduce the data transmission frequency. For example, if the communication line is occupied during data transmission at the first moment, data transmission can be resumed at the second moment, as long as data can be successfully transmitted within the transmission cycle.

[0106] In this embodiment, when crosstalk always exists between the target network and other networks, the data transmission frequency in the target network is reduced, and the data transmission timeliness is sacrificed to ensure the successful transmission of data in the target network.

[0107] In other embodiments, before adjusting the communication signal strength of the target network, the method further includes: determining the priority of the first communication data to be transmitted; if the priority is greater than a priority threshold, reducing the data transmission frequency of other networks so that the first communication data is transmitted with priority.

[0108] Communication data refers to data transmitted between network devices, or between network devices and network control devices. Priority is used to characterize the importance of communication data. Specifically, the "first" in "first communication data" distinguishes whether the communication data is to be sent by a network device or a network control device, while the "second" in "second communication data" in other embodiments of this application distinguishes whether the communication data is received by a network device or a network control device. For example, when upgrading, protecting, or scheduling devices in a target network is required, the priority of upgrade data, protection signals during system faults, or scheduling control signals is higher than that of conventionally transmitted device monitoring data, and therefore needs to be transmitted first. The priority of the first communication data can be determined by a priority identifier during communication interaction when the communication link is established.

[0109] For example, if the priority of the first communication data is greater than the priority threshold, the data transmission frequency of other networks is reduced, that is, the data transmission cycle of other networks is increased, so that the first communication data of the target network can be transmitted with priority.

[0110] In this embodiment, when the target network needs to transmit the first communication data, if crosstalk is detected between the target network and other networks, the data transmission cycle of other networks is adjusted to reduce the data transmission frequency of other networks, and important, high-priority data is transmitted first, so as to ensure the stability of the operation of each device in the system.

[0111] In some embodiments, the provided communication crosstalk suppression method is used for a target device in a target network, wherein the target device is a network device or a network control device in a communication system. The method further includes: acquiring second communication data through the target network; and not processing the second communication data if the network identifier in the second communication data is different from the network identifier configured in the target device and the network identifier in the second communication data does not belong to the valid identifier list of the target device.

[0112] In this embodiment, the same network identifier is configured for each network device or network control device in the same network. When the network device or network control device sends communication data, it carries the network identifier in the communication data, so that the receiver can determine whether the data was sent by a device in the same network based on the network identifier in the received communication data, thus avoiding responding to incorrect instructions.

[0113] For example, the network identifier in the communication data is PANID. PANID is a short 16-bit integer (0x0000 to 0xFFFF) used to uniquely represent a specific personal area network in wireless communication. Its main function is to allow multiple networks in the same physical space to distinguish each other and not interfere with each other.

[0114] In one implementation, during the networking process of network devices and network control devices, devices in the same network are assigned the same network identifier. After receiving the second communication data, the network device or network control device will first determine whether the network identifier carried in the second communication data is the same as the network identifier configured in its own device. If they are different, the second communication data will not be processed to prevent crosstalk and avoid performing incorrect operations. If they are the same, the second communication data will continue to be processed, parsed, and the corresponding operation will be performed.

[0115] In some implementation scenarios, there are network devices in the target network that have been disassembled and reassembled from other networks. These disassembled and reassembled devices (referred to as Class A devices for ease of description) have been assigned network identifiers from other networks. In order for these devices to communicate with the original network devices or network control devices in the target network (referred to as Class B devices for ease of description), the network identifier of the target network is written into the list of valid identifiers of Class A devices, and the valid identifier of Class A devices is written into the list of valid identifiers of Class B devices.

[0116] For example, this method is applied to a data acquisition unit in a target network device, where the data acquisition unit is an original device in the target network, and the network identifier in the data acquisition unit is the network identifier of the target network. The valid identifier list of the data acquisition unit includes the network identifier configured in a power converter disassembled from another network. In this embodiment, the data acquisition unit obtains second communication data sent by the power converter through the target network. If the network identifier in the second communication data is different from the network identifier configured in the data acquisition unit, and the network identifier in the second communication data does not belong to the valid identifier list of the data acquisition unit, the data acquisition unit does not process the second communication data. If the network identifier in the second communication data is the same as the network identifier configured in the data acquisition unit, or if the network identifier in the second communication data belongs to the valid identifier list of the data acquisition unit, the data acquisition unit processes the second communication data.

[0117] For example, this method is applied to a power converter in a target network device. This power converter is a power converter salvaged from another network, and the network identifier in this power converter is not the network identifier of the target network. The valid identifier list of the power converter includes the network identifier of the target network. In this embodiment, the power converter obtains second communication data sent by a data acquisition unit through the target network. If the network identifier in the second communication data is different from the network identifier configured in the data acquisition unit, and the network identifier in the second communication data is not in the valid identifier list of the power converter, the second communication data is not processed. If the network identifier in the second communication data is the same as the network identifier configured in the power converter, or if the network identifier in the second communication data is in the valid identifier list of the power converter, the power converter processes the second communication data.

[0118] In some embodiments, as shown in FIG3, a communication crosstalk suppression method is provided, the method comprising steps 302 to 310. Wherein:

[0119] Step 302: Determine whether there is crosstalk between the target network and other networks.

[0120] Communication crosstalk can be determined by analyzing the communication status data of the target network.

[0121] Communication status data can represent the communication line status, indicating the connection status between network devices. Taking communication between a network control device and other network devices as an example, after the network control device completes its connection with each network device, it sends test data to the target network device. After the test data is sent, the network control device receives an acknowledgment data frame returned after the test data transmission. By identifying this acknowledgment data frame, it obtains a line status identifier indicating the communication line status. If this line status identifier indicates that the current communication line is occupied, it means that there is crosstalk between the target network and other networks at the current moment.

[0122] In some other implementations, since each network periodically broadcasts its own network parameters on the communication bus, it is also possible to determine whether there is crosstalk between the target network and other networks by acquiring the broadcast network parameters of other networks on the communication bus and identifying whether the acquired network parameters include the network identifiers of other networks.

[0123] Step 304: Determine the priority of the first communication data, and prioritize the transmission of the first communication data with a priority greater than the priority threshold.

[0124] If the priority of the first communication data is greater than the priority threshold, the data transmission frequency of other networks is reduced, that is, the data transmission cycle of other networks is increased, so that the first communication data of the target network can be transmitted first.

[0125] Step 306: In the event of crosstalk between the target network and other networks, crosstalk suppression is achieved by adjusting the communication signal strength of the target network according to the first signal adjustment method.

[0126] At this point, the first signal adjustment method is used to adjust the communication signal strength. This adjustment is achieved by adjusting the transmitted signal power in the target network. As the communication signal strength of the target network decreases, crosstalk between the target network and other networks can be suppressed. During the adjustment of the communication signal strength, the communication quality parameters of the target network after adjustment are obtained, and it is determined whether these parameters meet preset communication quality conditions. If the adjusted communication quality parameters do not meet the preset conditions, the communication signal strength is further reduced and the communication quality parameters are updated until the updated parameters meet the preset communication conditions.

[0127] For example, when it is necessary to adjust the transmission signal power, the network control device controls itself and connected network devices to reduce the signal transmission power, thereby reducing the communication signal strength. It can be understood that as the communication signal strength decreases, the distance between devices for data transmission shortens. When reducing the signal transmission power, adjustments can be made sequentially according to a set value, for example, reducing the transmission power by 2dB each time, and so on.

[0128] After adjusting the signal strength of the communication signal, the network control device statistically analyzes communication quality parameters such as packet loss rate or LQI for itself and connected network devices, and compares the obtained communication quality parameters with preset communication quality conditions. Preset communication quality conditions include, for example, a packet loss rate of no more than 0.5% or an LQI value greater than 70. If the communication quality parameters do not meet the preset conditions, it indicates that the current target network no longer meets the minimum communication standards, and the adjustment of the communication signal strength ceases.

[0129] After each adjustment of the communication signal strength, crosstalk between the target network and other networks can be detected. If crosstalk still exists after the communication signal strength is reduced, and the communication quality parameters also meet the preset communication quality conditions, the communication signal is adjusted again according to the first signal adjustment method by adjusting the signal strength.

[0130] Step 308: If crosstalk still exists between the target network and other networks, and the communication quality parameters do not meet the preset communication conditions, crosstalk suppression is achieved by adjusting the modulation mode of the signal in the target network according to the second signal adjustment method.

[0131] As shown in Table 1, different modulation modes correspond to different signal-to-noise ratios (SNR). SNR is related to the link quality index (LQI). When the communication signal strength is adjusted to the point where the communication quality index does not meet the preset communication quality conditions, but crosstalk still exists between the target network and other networks, the second signal adjustment mode can be used. By adjusting the modulation mode of the signal, the LQI requirement for data parsing is increased. Since the LQI of the crosstalk data from other networks is lower, as the LQI required for data parsing by the target network increases, the low-LQI crosstalk data cannot be parsed, thus achieving communication crosstalk suppression.

[0132] In the adjustment according to the second signal adjustment mode, if crosstalk still exists between the target network and other networks after the modulation mode of the signal in the target network is adjusted, the modulation mode is adjusted repeatedly, and the current link quality parameter LQI is determined after each adjustment of the modulation mode, until the adjusted link quality parameter LQI does not meet the standard link quality parameter in the preset communication quality conditions.

[0133] Step 310: If crosstalk still exists between the target network and other networks, crosstalk suppression is achieved by adjusting the frequency of data transmission in the target network.

[0134] When crosstalk exists between the target network and other networks, the data transmission cycle in the target network is increased to reduce the data transmission frequency. By sacrificing the timeliness of data transmission, the successful transmission of data in the target network is guaranteed.

[0135] This embodiment is applied to communication in a photovoltaic system. When a device in the target network needs to transmit data but crosstalk exists between the target network and other networks, a signal adjustment method can be flexibly selected based on communication quality parameters and preset communication quality conditions. This includes various signal adjustment methods such as reducing the communication signal strength, adjusting the signal modulation mode, and adjusting the signal transmission frequency. By adjusting the communication signal, crosstalk is suppressed, thereby reducing the impact of crosstalk between the target network and other networks on data transmission. In this embodiment, the communication system suppresses crosstalk in the target network using the aforementioned crosstalk suppression methods during data transmission, ensuring successful data transmission and improving the data transmission quality in the target network, thus increasing the data transmission efficiency.

[0136] It is understood that this disclosure provides multiple methods for suppressing communication crosstalk. In practical applications, any one or more methods can be selected for crosstalk suppression, and this disclosure does not limit the order or number of these communication crosstalk suppression measures.

[0137] In some embodiments, a communication system is proposed that suppresses crosstalk present in the communication system using the communication crosstalk suppression method proposed in the above embodiments. The structure of the communication system is shown in Figure 1, including several network devices, a network control device, and a power distribution device. Each network device is connected to a photovoltaic module and is used to convert the electrical signals generated by the photovoltaic device to obtain converted electrical signals. The network control device is connected to each network device and is used to collect the converted electrical signals sent by each network device and acquire device data from each network device. The power distribution device is connected to the network control device and is used to connect the network control device to the power grid.

[0138] Furthermore, a switch can be provided between the network control device and the network devices to connect the network devices to the network control device. For example, this switch can be an air switch or a relay.

[0139] In some other embodiments, as shown in FIG4, the communication system further includes a wave-blocking device, which is disposed between the network control device and the power distribution device to isolate and block signals in the circuit, thereby isolating the communication signals of the target network from the communication signals of other networks.

[0140] As shown in Figure 5, the close proximity of network A and network B causes interference in their communication data, resulting in crosstalk. In some other embodiments, the distance between the lines of different photovoltaic systems can be increased during deployment to reduce coupling interference between lines and suppress crosstalk.

[0141] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0142] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0143] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the scope of protection of this disclosure. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A method for suppressing crosstalk in communication, wherein, The method includes: Acquire communication status data of the target network, and determine whether there is crosstalk between the target network and other networks based on the communication status data; In the presence of crosstalk, the communication signal of the target network is adjusted according to the first signal adjustment method, and the communication quality parameters after the communication signal adjustment are obtained; If the communication quality parameters do not meet the preset communication quality conditions, the communication signal is adjusted according to the second signal adjustment method; the first signal adjustment method and the second signal adjustment method are different.

2. The method according to claim 1, wherein, After adjusting the communication signal of the target network according to the first signal adjustment method and obtaining the communication quality parameters after the communication signal adjustment, the method further includes: Determine whether crosstalk still exists between the adjusted target network and the other networks; If crosstalk still exists and the communication quality parameters meet the preset communication quality conditions, then the communication signal of the target network is repeatedly adjusted according to the first signal adjustment method.

3. The method according to claim 1, wherein, When the first signal adjustment method is used to adjust the signal strength, adjusting the communication signal of the target network according to the first signal adjustment method includes: adjusting the transmission power of the communication signal so as to achieve a change in the communication signal strength through the change in the transmission power; or, When the second signal adjustment method is used to adjust the signal strength, adjusting the communication signal of the target network according to the second signal adjustment method includes: adjusting the transmission power of the communication signal so as to achieve a change in the communication signal strength through the change in the transmission power.

4. The method according to claim 1, wherein, The step of acquiring communication status data of the target network and determining whether crosstalk exists between the target network and other networks based on the communication status data includes: In the target network, identify the target network device to be communicated with, and determine the status of the communication line between the target network device and the target network device; If the communication line between the target network device and the target network device is found to be occupied based on the communication line status, then it is determined that there is crosstalk between the target network and the other networks.

5. The method according to claim 4, wherein, Determining the communication line status with the target network device includes: Send test data to the target network device and receive an acknowledgment data frame returned after the test data is sent; Identify the confirmation data frame and obtain a line status identifier that characterizes the communication line status based on the confirmation data frame.

6. The method according to claim 1, wherein, The method further includes: If network parameters corresponding to other networks are received, and the network identifier of other networks is identified in the network parameters, it is determined that there is crosstalk between the target network and the other networks. The network parameters are parameters that are periodically broadcast by each network.

7. The method according to any one of claims 1 to 6, wherein, The method further includes: If crosstalk always exists between the target network and the other networks, the frequency of data transmission in the target network should be reduced.

8. The method according to claim 1, wherein, Before adjusting the communication signal of the target network according to the target signal adjustment method, the method further includes: Determine the priority of the first piece of communication data to be transmitted; If the priority is greater than the priority threshold, the data transmission frequency of the other networks is reduced so that the first communication data is transmitted with priority.

9. The method according to claim 1, wherein, The method is used for a target device in a target network, wherein the target device is a network device or a network control device in the communication system, and the method further includes: Second communication data is obtained through the target network; If the network identifier in the second communication data is different from the network identifier configured in the target device and the network identifier in the second communication data does not belong to the valid identifier list of the target device, the second communication data will not be processed.

10. A communication system, wherein, The communication system includes: Several network devices, each of which is connected to a photovoltaic module, are used to convert the electrical signals generated by the photovoltaic device to obtain the converted electrical signals; A network control device, connected to each of the network devices, is used to collect the converted electrical signals sent by each of the network devices and to collect the device data of each of the network devices; Power distribution equipment, connected to the network control equipment, for connecting the network control equipment to the power grid; wherein: The communication system suppresses crosstalk between the target network and other networks in the communication system according to the communication crosstalk suppression method as described in any one of claims 1-9.

11. The communication system according to claim 10, wherein, The communication system also includes a wave-blocking device, which is disposed between the network control device and the power distribution device to isolate the communication signals of the target network from the communication signals of other networks.

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