PLC method and apparatus, and chip, chip module and storage medium

Abstract

A PLC method and apparatus, and a chip, a chip module and a storage medium. The method comprises: generating a first signal, wherein the first signal is repeated in n orthogonal spatial domain directions or space-time directions; and sending the first signal in the n orthogonal spatial domain directions or space-time directions of an m-dimensional linear space, wherein m and n are positive integers, and m≥n. By using the solution of the present application, the reliability of PLC is improved by means of repeatedly sending a signal in a plurality of orthogonal spatial domain directions or space-time directions.

Description

PLC communication method, device, chip, chip module and storage medium

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on November 29, 2023, with application number 202311628304.8 and invention name “PLC communication method, device, chip, chip module and storage medium”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of power line communication (PLC), and in particular to a PLC communication method, device, chip, chip module and storage medium. Background Art

[0003] Since power lines are not specifically used as a medium for communication, the environmental characteristics of power lines (mainly power line noise, load and impedance, environmental time-varying, etc.) create some characteristics of PLC communication (time-varying, large attenuation, and complex interference noise).

[0004] Space-time codes can be used to improve diversity gain in broadcast frames.

[0005] However, the signals sent in some directions are subject to strong noise interference, resulting in poor signal reliability. Therefore, how to improve the reliability of PLC communication is an urgent problem to be solved.

[0006] Summary of the Invention

[0007] The present application provides a PLC communication method, device, chip, chip module and storage medium to improve the reliability of PLC communication.

[0008] In a first aspect, a PLC communication method is provided, which is applied to a first PLC node, or a circuit or chip used for the first PLC node, the method comprising: generating a first signal, wherein the first signal is repeated in n orthogonal spatial directions or space-time directions; and sending the first signal in the n orthogonal spatial directions or space-time directions in an m-dimensional linear space, where m and n are positive integers, and m≥n.

[0009] In this aspect, the reliability of PLC communication is improved by repeatedly sending signals in multiple orthogonal spatial directions or space-time directions.

[0010] In a second aspect, a PLC communication device is provided, which can implement the method in the first aspect or any one of the implementations of the first aspect. The method can be implemented by software, hardware, or by hardware executing corresponding software.

[0011] In one possible implementation, the device includes: a processing unit and a transceiver unit; wherein the processing unit is used to generate a first signal, wherein the first signal is repeated in n orthogonal spatial directions or space-time directions; and the transceiver unit is used to send the first signal in the n orthogonal spatial directions or space-time directions in an m-dimensional linear space, where m and n are positive integers, and m≥n.

[0012] In another possible implementation, the device in the second aspect includes a processor coupled to a memory; the processor is configured to support the device in performing the corresponding functions in the above method. The memory is used to couple with the processor, and stores the necessary programs (instructions) and / or data for the device. Optionally, the device may further include an interface for supporting interaction between the device and other devices. Optionally, the memory may be located inside the device or outside the device. Optionally, the memory and the processor may be integrated together.

[0013] In another possible implementation, the device in the second aspect includes a processor and an interface circuit, the processor being coupled to the interface circuit, the processor being used to execute a computer program or instruction to control the interface circuit to receive and send information; when the processor executes the computer program or instruction, the processor is also used to implement the above method through a logic circuit or execution code instruction. The interface circuit may be a transceiver, a transceiver circuit, or an input / output interface, configured to receive signals from other devices outside the device and transmit them to the processor, or to send signals from the processor to other devices outside the device. When the device is a chip, the interface circuit is a transceiver circuit or an input / output interface.

[0014] When the device in the second aspect described above is a chip or a chip module, the sending unit may be an output unit, such as an output circuit or an interface; and the receiving unit may be an input unit, such as an input circuit or an interface.

[0015] In combination with the first aspect or the second aspect, in a possible implementation, the first signal includes a control field, and the control field is used to indicate that the first signal is repeated in n orthogonal spatial directions or space-time directions.

[0016] In this implementation, by indicating in the control field of the first signal that the first signal is repeated in n orthogonal spatial directions or space-time directions, the receiving end (eg, the second PLC node) can accurately receive and demodulate the first signal.

[0017] In combination with the first aspect or the second aspect, in another possible implementation, m=2, n=2, the first signal is sent via two transmitters, and the first signal s0 satisfies:

[0018] Among them, y(0) is the received signal at time 0, y * (1) is the conjugate of the received signal y(1) at the first moment, h0 is the channel gain from the first transmitter to the receiving antenna, h1 is the channel gain from the second transmitter to the receiving antenna, n(0) is the noise at the 0th moment, n * (1) is the conjugate of the noise n(1) at the first moment, is the conjugate of h0, is the conjugate of h1;

[0019] First direction Second direction The first direction and the second direction are orthogonal to each other.

[0020] For example, the received signal at time 0 may be the kth subcarrier of the 0th orthogonal frequency division multiplexing (OFDM) symbol; and the received signal at time 1 may be the kth subcarrier of the 1st OFDM symbol, where k is a positive integer.

[0021] Exemplarily, the control field includes 1 bit, and the 1 bit is used to indicate whether the first signal is repeated in two orthogonal spatial directions or space-time directions.

[0022] In this implementation, for the scenario of two transmitters, the reliability of PLC communication is improved by repeatedly sending signals in two orthogonal spatial directions or space-time directions.

[0023] In combination with the first aspect or the second aspect, in yet another possible implementation, m=4, n=3, the first signal is sent via three transmitters, and the first signal s0 satisfies:

[0024] Among them, y(0) is the received signal at time 0, y * (1) is the conjugate of the received signal y(1) at the first moment, y * (2) is the conjugate of the received signal y(2) at the second moment, y *(3) is the conjugate of the received signal y(3) at the third moment, h0 is the channel gain from the first transmitter to the receiving antenna, h1 is the channel gain from the second transmitter to the receiving antenna, h2 is the channel gain from the third transmitter to the receiving antenna, n(0) is the noise at the 0th moment, n * (1) is the conjugate of the noise n(1) at the first moment, n * (2) is the conjugate of the noise n(2) at the second moment, n * (3) is the conjugate of the noise n(3) at the third moment, is the conjugate of h0, is the conjugate of h1, is the conjugate of h2;

[0025] First direction Second direction The third direction The first direction, the second direction and the third direction are orthogonal to each other.

[0026] For example, the received signal at time 0 may be the kth subcarrier of the 0th OFDM symbol; the received signal at time 1 may be the kth subcarrier of the 1st OFDM symbol; the received signal at time 2 may be the kth subcarrier of the 2nd OFDM symbol; and the received signal at time 3 may be the kth subcarrier of the 3rd OFDM symbol, where k is a positive integer.

[0027] Exemplarily, the control field includes 1 bit, and the 1 bit is used to indicate whether the first signal is repeated in 3 orthogonal spatial directions or space-time directions.

[0028] In this implementation, for the scenario of three transmitters, the reliability of PLC communication is improved by repeatedly sending signals in three orthogonal spatial directions or space-time directions.

[0029] In combination with the first aspect or the second aspect, in yet another possible implementation, m=4, n=4, the first signal is sent via three transmitters, and the first signal s0 satisfies:

[0030] Wherein, y(0) is the received signal at the 0th moment, y*(1) is the conjugate of the received signal y(1) at the 1st moment, y*(2) is the conjugate of the received signal y(2) at the 2nd moment, y(3) is the received signal at the 3rd moment, h0 is the channel gain from the first transmitter to the receiving antenna, h1 is the channel gain from the second transmitter to the receiving antenna, h2 is the channel gain from the third transmitter to the receiving antenna, n(0) is the noise at the 0th moment, n*(1) is the conjugate of the noise n(1) at the 1st moment, n*(2) is the conjugate of the noise n(2) at the 2nd moment, and n*(3) is the conjugate of the noise n(3) at the 3rd moment. is the conjugate of h0, is the conjugate of h1, is the conjugate of h2;

[0031] First direction Second direction The third direction Fourth Direction The first direction is orthogonal to the second direction and the third direction, the fourth direction is orthogonal to the second direction and the third direction, the second direction is orthogonal to the first direction and the fourth direction, and the third direction is orthogonal to the first direction and the fourth direction.

[0032] For example, the received signal at time 0 may be the kth subcarrier of the 0th OFDM symbol; the received signal at time 1 may be the kth subcarrier of the 1st OFDM symbol; the received signal at time 2 may be the kth subcarrier of the 2nd OFDM symbol; and the received signal at time 3 may be the kth subcarrier of the 3rd OFDM symbol, where k is a positive integer.

[0033] In this implementation, for the scenario of three transmitters, the reliability of PLC communication is improved by repeatedly sending signals in four orthogonal spatial directions or space-time directions.

[0034] In combination with the first aspect or the second aspect, in yet another possible implementation, the first signal is further repeated on multiple time-frequency domain resources.

[0035] In this implementation, in addition to repeatedly sending signals in orthogonal spatial directions or space-time directions, signals can also be repeatedly sent in the time-frequency domain, further improving the reliability of PLC communication.

[0036] In a third aspect, a computer-readable storage medium is provided, in which a computer program or instruction is stored. When a computer executes the computer program or instruction, the method described in the first aspect or any one of the implementations of the first aspect is implemented.

[0037] In a fourth aspect, a computer program product comprising instructions is provided. When the instructions are executed on a device, the device executes the method described in the first aspect or any one of the implementations of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] FIG1 is a schematic diagram of a power line carrier communication networking method;

[0039] Figure 2 is a schematic diagram of the structure of PLC communication in three-phase power;

[0040] FIG3 is a flow chart of a PLC communication method provided in an embodiment of the present application;

[0041] FIG4 is a schematic structural diagram of a PLC communication device provided in an embodiment of the present application;

[0042] FIG5 is a schematic diagram of the structure of another PLC communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0043] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0044] PLC is a communication method that uses power lines as a transmission medium. PLC technology has a wide range of applications, including smart grids, smart homes, and industrial automation. The basic principle of PLC technology is to use power lines as a transmission medium, transmitting digital signals by varying the voltage and current of the power lines. PLC technology primarily involves modulation and demodulation, signal transmission, and signal processing. Modulation and demodulation convert digital signals into analog signals, signal transmission transmits analog signals over power lines, and signal processing converts the transmitted analog signals back into digital signals.

[0045] Power line high-speed carrier communication technology utilizes OFDM modulation, ensuring reliable data transmission in harsh environments with multipath and electromagnetic interference. Power lines are not designed specifically for communication, so the characteristics of the power line environment contribute to certain features of PLC communication. These environmental characteristics primarily include power line noise, load and impedance, and time-varying environmental conditions. The transmission characteristics of power line carrier channels are characterized by time-varying transmission, significant attenuation, and complex interference noise.

[0046] Figure 1 shows the network structure for power line carrier communication. It forms a tree-like network with a central coordinator (CCO) at the center and proxy coordinators (PCOs) as relay agents, connecting all stations (STAs) in a multi-level, interconnected network. The CCO is the master node in the communication network, responsible for network control, network maintenance, and management, and for point-to-point communication with STAs. The PCO relays data between the CCO and STAs, or between STAs.

[0047] The PLC node in this application is a module with PLC communication capabilities that can be installed in concentrators, switches, meters, and other power equipment. It is divided into CCO, PCO, STA and other roles.

[0048] Among them, the concentrator is the central management device and control device of the remote centralized meter reading system, responsible for functions such as regular reading of terminal data, system command transmission, data communication, network management, event recording, and horizontal transmission of data.

[0049] Among them, the PLC network refers to a tree network composed of PLC nodes with roles such as CCO, PCO, and STA.

[0050] CCO: It is the root node of the PLC network and is generally installed in the concentrator. It collects information from all PLC nodes in the PLC network and then transmits it to the power bureau's computer room via 4G / 5G / optical fiber and other communication methods.

[0051] PCO: The communication nodes of a power line network form a tree-like network. Leaf nodes (STAs) communicate with the CCOs through proxy nodes (PCOs), which may pass through multiple levels of proxy nodes. PLC nodes can be installed at locations such as power switches and meters and serve as PCOs. The tree network topology is adaptive and constantly changing, and the PLC node's role as PCO may switch between STAs and PCOs as the topology changes.

[0052] STA: This node is the last node in the power line network and does not relay to other nodes. Locations such as power switches and meters can serve as STAs. The topology of a tree network is adaptive and constantly changing. As the topology changes, the PLC node's PCO role may switch between the STA role and the PCO role.

[0053] In a PLC network, there are two types of signal frames: broadcast frames and unicast frames.

[0054] For unicast frames, two stations may perform transmit beamforming (tx beamforming) training and bit loading (bit loading) training during point-to-point communication, and then communicate between the two stations.

[0055] Training is generally not possible for broadcast frames because there are many receiving nodes and there is no optimal beamforming and bit loading solution for all nodes receiving broadcast frames.

[0056] Taking the application of PLC technology in the field of smart grid as an example, most single-phase meters in the PLC network have only one receiving port, and the receiving performance of the single-phase meter is limited.

[0057] For three-phase meters using PLC technology, the three-phase power is located at the junction box, and signals can be transmitted using either port 2 or port 3. Figure 2 shows a schematic diagram of the structure for PLC communication in three-phase power. The transmitting end (which can be located on the junction box) includes three transmitting ports, port 0, port 1, and port 2, which are connected to the junction box's AN phase, BN phase, and CN phase, respectively. The receiving end includes three receiving ports, port 0, port 1, and port 2, which are connected to the AN phase, BN phase, and CN phase, respectively. A / B / C are the live wires of the 220V power line, and N is the neutral wire of the 220V power line.

[0058] Among them, the above-mentioned smart grid refers to a new type of power grid based on the physical power grid, which is formed by highly integrating modern advanced sensing and measurement technology, communication technology, information technology, computer technology and control technology with the physical power grid.

[0059] Space-time coding can be used in broadcast frames to improve diversity gain. Currently, space-time coding can be used in scenarios where multiple transmissions (TX) and one reception (RX) are used, improving the diversity reception performance of the RX.

[0060] (1) The complex orthogonal space-time code of 2 transmitting antennas and 1 receiving antenna is as follows:

[0061] The first transmitter TX0 sends s0 at time 0 and sends The second transmitter TX1 sends s1 at time 0 and sends is the conjugate of s0; is the conjugate of s1.

[0062] y(0) is the received signal at time 0, y(1) is the received signal at time 1, h0 is the channel gain from the first transmitter to the receiving antenna, h1 is the channel gain from the second transmitter to the receiving antenna, n(0) is the noise at time 0, and n(1) is the noise at time 1.

[0063] The above formula 1 can be written in another form:

[0064] Can be seen as v0 and v1 are orthogonal

[0065] It can be regarded as the signal being transmitted in two mutually orthogonal directions in a two-dimensional linear space. This space-time code transmits two symbols in two time slots, with a code rate of R = 1, which is less than the code rate of space division multiplexing R = 2.

[0066] (2) The complex orthogonal space-time code of 3 transmitting antennas and 1 receiving antenna is as follows:

[0067] The first transmitter TX0 sends s0 at time 0 and sends Sent at time 2 Send 0 at the 3rd moment;

[0068] The second transmitter TX1 sends s1 at time 0 and sends Send 0 at the second moment and send 0 at the third moment

[0069] The third transmitter TX2 sends s2 at time 0, sends 0 at time 1, and sends Sent at time 3

[0070] Wherein, y(0) is the received signal at the 0th moment, y(1) is the received signal at the 1st moment, y(2) is the received signal at the 2nd moment, y(3) is the received signal at the 3rd moment, h0 is the channel gain from the first transmitter to the receiving antenna, h1 is the channel gain from the second transmitter to the receiving antenna, h2 is the channel gain from the third transmitter to the receiving antenna, n(0) is the noise at the 0th moment, n(1) is the noise at the 1st moment, n(2) is the noise at the 2nd moment, and n(3) is the noise at the 3rd moment.

[0071] is the conjugate of s0; is the conjugate of s1; is the conjugate of s2.

[0072] The above formula 3 can be written in another form:

[0073] Can be seen as v0 and v1 are orthogonal v0 and v2 are orthogonal v1 and v2 are orthogonal

[0074] The signal is transmitted in three mutually orthogonal directions in a four-dimensional linear space. This space-time code transmits three symbols in four time slots, with a code rate of R = 3 / 4, which is less than the code rate R = 1 of the space-time code of TX2.

[0075] (3) The quasi-orthogonal space-time code of 3 transmitting antennas and 1 receiving antenna is as follows:

[0076] Wherein, y(0) is the received signal at the 0th moment, y(1) is the received signal at the 1st moment, y(2) is the received signal at the 2nd moment, y(3) is the received signal at the 3rd moment, h0 is the channel gain from the first transmitter to the receiving antenna, h1 is the channel gain from the second transmitter to the receiving antenna, h2 is the channel gain from the third transmitter to the receiving antenna, n(0) is the noise at the 0th moment, n(1) is the noise at the 1st moment, n(2) is the noise at the 2nd moment, and n(3) is the noise at the 3rd moment.

[0077] is the conjugate of s0; is the conjugate of s1; is the conjugate of s2.

[0078] The above formula 5 can be written in another form:

[0079] Among them, the first direction Second direction The third direction Fourth Direction

[0080] v0 is orthogonal to v1 and v2;

[0081] v3 is orthogonal to v1 and v2; v1 is orthogonal to v0 and v3;

[0082] v2 is orthogonal to v0 and v3;

[0083] v0 and v3 as the first group are orthogonal to the second group of v1 and v2, but v0 and v3 in the first group are not orthogonal, and v1 and v2 in the second group are not orthogonal. The groups are orthogonal, but not orthogonal within the groups, so it is called quasi-orthogonal.

[0084] For a quasi-orthogonal space-time code with three transmitters, four symbols are sent in four time slots, with a code rate of 1, which is higher than the code rate of 3 / 4 of the complex orthogonal space-time code.

[0085] In this article, "transmitter" can also be called "transmitting port"; "receiver" can also be called "receiving port".

[0086] However, unlike white noise (which has the same noise interference power in every direction), the predominant impulse noise in PLC networks is typically stronger in one direction than in other directions in linear space. For the aforementioned complex orthogonal space-time code with two transmit antennas and one receive antenna, or the complex orthogonal space-time code with three transmit antennas and one receive antenna, sending different signals in different orthogonal directions may result in stronger interference from impulse noise in one direction, making the signal in that direction unreliable.

[0087] In addition, the OFDM signal format is commonly used in PLC communications, with multiple copies being repeated across different OFDM symbols and frequency subcarriers to achieve time and frequency domain diversity. However, using only time and frequency domain repetition diversity is insufficient for multiple-input, multiple-output (MIMO) communications.

[0088] In view of this, the present application provides a PLC communication solution, which improves the reliability of PLC communication by repeatedly sending signals in multiple orthogonal spatial directions or space-time directions.

[0089] The PLC communication method provided by the embodiment of the present application is described in detail below. It can be understood that the present application uses the first PLC node and the second PLC node as examples of the execution subjects of the interaction diagram, but the present application does not limit the execution subjects of the interaction diagram. For example, the first PLC node in the method provided by the present application can also be a chip, chip system, circuit or processor applied to the first PLC node, or a logical node, logic module or software that can implement all or part of the first PLC node; the second PLC node in the method provided by the present application can also be a chip, chip system, circuit or processor applied to the second PLC node, or a logical node, logic module or software that can implement all or part of the functions of the second PLC node.

[0090] As shown in FIG3 , a flow chart of a PLC communication method provided in an embodiment of the present application is shown. Exemplarily, the method may include the following steps:

[0091] S301. The first PLC node generates a first signal.

[0092] In this embodiment, the first PLC node serves as a transmitter. Exemplarily, the first PLC node may be any PLC node in the PLC network shown in FIG1 , such as a CCO, a PCO, or a STA.

[0093] Before sending the first signal, the first PLC node generates the first signal. In this embodiment, the first signal generated by the first PLC node is repeated in n orthogonal spatial directions or space-time directions, that is, the first PLC node repeatedly copies the first signal in the n orthogonal spatial directions or space-time directions.

[0094] The first signal is repeated in n orthogonal spatial directions, and the first PLC node is sent in different spatial directions at different times. Therefore, it can also be considered that the first signal is repeated in n orthogonal space-time directions.

[0095] In a PLC network, since the main pulse noise in the PLC network is, in linear space, generally stronger in a certain direction than in other directions, in this embodiment, the first PLC node repeatedly copies the first signal in n orthogonal spatial directions or space-time directions, so that the receiving end (i.e., the second PLC node) can have better signal quality in at least one direction (the direction with weaker noise), thereby reliably receiving and demodulating the first signal.

[0096] Furthermore, the first signal control field is used to indicate that the first signal is repeated in n orthogonal spatial directions or space-time directions. By indicating in the control field of the first signal that the first signal is repeated in n orthogonal spatial directions or space-time directions, the second PLC node can accurately receive and demodulate the first signal.

[0097] In the first example, m=2, n=2, the first signal is sent via two transmitters, and the first signal s0 satisfies:

[0098] Where y(0) is the received signal at time 0, y*(1) is the conjugate of the received signal y(1) at time 1, h0 is the channel gain from the first transmitter to the receiving antenna, h1 is the channel gain from the second transmitter to the receiving antenna, n(0) is the noise at time 0, and n*(1) is the conjugate of the noise n(1) at time 1. is the conjugate of h0, is the conjugate of h1;

[0099] First direction Second direction The first direction and the second direction are orthogonal to each other.

[0100] For example, the received signal at time 0 may be the kth subcarrier of the 0th OFDM symbol, and the received signal at time 1 may be the kth subcarrier of the 1st OFDM symbol, where k is a positive integer.

[0101] Exemplarily, the control field may include one bit, which is used to indicate whether the first signal is repeated in two orthogonal spatial directions or space-time directions. For example, when the value of this bit is "1", it is used to indicate that the first signal is repeated in two orthogonal spatial directions or space-time directions; when the value of this bit is "0", it is used to indicate that the first signal is not repeated in two orthogonal spatial directions or space-time directions. The reverse is also possible.

[0102] For the above scenario of two transmitters, the reliability of PLC communication is improved by repeatedly sending signals in two orthogonal spatial directions or space-time directions.

[0103] In the second example, m=4, n=3, the first signal is sent through three transmitters, and the first signal s0 satisfies:

[0104] Where y(0) is the received signal at time 0, y*(1) is the conjugate of the received signal y(1) at time 1, y*(2) is the conjugate of the received signal y(2) at time 2, y*(3) is the conjugate of the received signal y(3) at time 3, h0 is the channel gain from the first transmitter to the receiving antenna, h1 is the channel gain from the second transmitter to the receiving antenna, h2 is the channel gain from the third transmitter to the receiving antenna, n(0) is the noise at time 0, n*(1) is the conjugate of the noise n(1) at time 1, n*(2) is the conjugate of the noise n(2) at time 2, and n*(3) is the conjugate of the noise n(3) at time 3. is the conjugate of h0, is the conjugate of h1, is the conjugate of h2;

[0105] First direction Second direction The third direction The first direction, the second direction and the third direction are orthogonal to each other.

[0106] For example, the received signal at time 0 may be the kth subcarrier of the 0th OFDM symbol; the received signal at time 1 may be the kth subcarrier of the 1st OFDM symbol; the received signal at time 2 may be the kth subcarrier of the 2nd OFDM symbol; and the received signal at time 3 may be the kth subcarrier of the 3rd OFDM symbol, where k is a positive integer.

[0107] Exemplarily, the control field includes one bit, which is used to indicate whether the first signal is repeated in three orthogonal spatial directions or space-time directions. For example, when the value of this bit is "1", it is used to indicate that the first signal is repeated in three orthogonal spatial directions or space-time directions; when the value of this bit is "0", it is used to indicate that the first signal is not repeated in the three orthogonal spatial directions or space-time directions. The reverse is also possible.

[0108] For the scenario with three transmitters, the reliability of PLC communication is improved by repeatedly sending signals in three orthogonal spatial directions or space-time directions.

[0109] In the third example, m=4, n=4, the first signal is sent through three transmitters, and the first signal s0 satisfies:

[0110] Where y(0) is the received signal at time 0, y*(1) is the conjugate of the received signal y(1) at time 1, y*(2) is the conjugate of the received signal y(2) at time 2, y(3) is the received signal at time 3, h0 is the channel gain from the first transmitter to the receiving antenna, h1 is the channel gain from the second transmitter to the receiving antenna, h2 is the channel gain from the third transmitter to the receiving antenna, n(0) is the noise at time 0, n*(1) is the conjugate of the noise n(1) at time 1, n*(2) is the conjugate of the noise n(2) at time 2, and n*(3) is the conjugate of the noise n(3) at time 3. is the conjugate of h0, is the conjugate of h1, is the conjugate of h2;

[0111] First direction Second direction The third direction Fourth Direction The first direction is orthogonal to the second direction and the third direction, the fourth direction is orthogonal to the second direction and the third direction, the second direction is orthogonal to the first direction and the fourth direction, and the third direction is orthogonal to the first direction and the fourth direction.

[0112] Right now: v0 is orthogonal to v1 and v2;

[0113] v3 is orthogonal to v1 and v2;

[0114] v1 is orthogonal to v0 and v3;

[0115] v2 is orthogonal to v0 and v3;

[0116] v0 and v3 can be regarded as the first group, which is orthogonal to the second group of v1 and v2. However, v0 and v3 in the first group are not orthogonal, and v1 and v2 in the second group are not orthogonal. The groups are orthogonal, but not orthogonal within the groups, so it is called quasi-orthogonal.

[0117] For example, the received signal at time 0 may be the kth subcarrier of the 0th OFDM symbol; the received signal at time 1 may be the kth subcarrier of the 1st OFDM symbol; the received signal at time 2 may be the kth subcarrier of the 2nd OFDM symbol; and the received signal at time 3 may be the kth subcarrier of the 3rd OFDM symbol, where k is a positive integer.

[0118] In this example, the copy s0 is repeated in four quasi-orthogonal spatial directions or space-time directions.

[0119] For the scenario of the three transmitters mentioned above, the reliability of PLC communication is improved by repeatedly sending signals in four orthogonal spatial directions or space-time directions.

[0120] Furthermore, the first signal can be repeated on multiple time-frequency domain resources. Thus, in addition to repeatedly sending signals in orthogonal spatial or space-time directions, signals can also be repeatedly sent in the time-frequency domain, further improving the reliability of PLC communication.

[0121] For example, in the prior art, the first PLC node may make four copies at four time-frequency domain positions. However, using only time-domain and frequency-domain repetition diversity is insufficient in MIMO communication.

[0122] In this embodiment, in the first example described above, the first PLC node performs two copies in two orthogonal spatial or space-time directions, and also performs two copies at two time-frequency domain locations. This allows for repeated copies to be made not only at the time-frequency domain locations, but also in the spatial or space-time directions, thereby improving diversity gain. If the first PLC node performs two copies in the space-time direction at the 0th and 1st OFDM symbols, the first PLC node can perform the first copy at the time-frequency domain location at the 0th or 1st OFDM symbol, and the second copy at the time-frequency domain location at the 2nd or 3rd OFDM symbol.

[0123] By adopting this example, the diversity gain can be further improved compared to the first PLC node making four copies at four time-frequency domain positions.

[0124] In the second example above, the first PLC node makes three copies in three orthogonal spatial directions or space-time directions, and also makes x copies at x time-frequency domain positions, so that repeated copies are made not only in the time-frequency domain positions, but also in the spatial direction or space-time direction, thereby improving diversity gain. If the first PLC node makes three copies in the space-time direction on the 0th, 1st, and 2nd OFDM symbols, then the first PLC node can make the first copy of the time-frequency domain position on the 0th, 1st, or 2nd OFDM symbol, and the x-1th copy of the time-frequency domain position on the 3rd, 4th, or 5th OFDM symbol, and so on. Where x is a positive integer greater than or equal to 1.

[0125] In the third example above, the first PLC node makes four copies in four orthogonal spatial directions or space-time directions, and also makes y copies at y time-frequency domain positions, so that repeated copies are made not only in the time-frequency domain positions, but also in the spatial direction or space-time direction, thereby improving diversity gain. If the first PLC node makes four copies in the space-time direction on the 0th, 1st, 2nd, and 3rd OFDM symbols, then the first PLC node can make the first copy of the time-frequency domain position on the 0th, 1st, 2nd, or 3rd OFDM symbol, and the y-1th copy of the time-frequency domain position on the 4th, 5th, 6th, or 7th OFDM symbol, and so on. Where y is a positive integer greater than or equal to 1.

[0126] S302. The first PLC node sends a first signal to the second PLC node in n orthogonal spatial directions or space-time directions in the m-dimensional linear space. Correspondingly, the second PLC node receives the first signal in n orthogonal spatial directions or space-time directions in the m-dimensional linear space.

[0127] After the first PLC node generates the first signal, it sends the first signal to the second PLC node in n orthogonal spatial directions or space-time directions in the m-dimensional linear space, where m and n are positive integers and m≥n.

[0128] This method can be applied to broadcast frames or unicast frames with fixed modulation and code rate without bitloading or beamforming, and can improve diversity gain.

[0129] According to a PLC communication method provided by an embodiment of the present application, the reliability of PLC communication is improved by repeatedly sending signals in multiple orthogonal spatial directions or space-time directions.

[0130] In another embodiment, the first PLC node may repeatedly transmit the signal in partially orthogonal spatial directions or space-time directions.

[0131] In the fourth example, m=4, n=3, the first signal is sent through three transmitters, and in addition, the first PLC node also generates and sends the second signal s1. The first signal s0 and the second signal s1 satisfy:

[0132] Where y(0) is the received signal at time 0, y*(1) is the conjugate of the received signal y(1) at time 1, y*(2) is the conjugate of the received signal y(2) at time 2, y*(3) is the conjugate of the received signal y(3) at time 3, h0 is the channel gain from the first transmitter to the receiving antenna, h1 is the channel gain from the second transmitter to the receiving antenna, h2 is the channel gain from the third transmitter to the receiving antenna, n(0) is the noise at time 0, n*(1) is the conjugate of the noise n(1) at time 1, n*(2) is the conjugate of the noise n(2) at time 2, and n*(3) is the conjugate of the noise n(3) at time 3. is the conjugate of h0, is the conjugate of h1, is the conjugate of h2;

[0133] First direction Second direction The third direction The first direction, the second direction and the third direction are orthogonal to each other.

[0134] For example, the received signal at time 0 may be the kth subcarrier of the 0th OFDM symbol; the received signal at time 1 may be the kth subcarrier of the 1st OFDM symbol; the received signal at time 2 may be the kth subcarrier of the 2nd OFDM symbol; and the received signal at time 3 may be the kth subcarrier of the 3rd OFDM symbol, where k is a positive integer.

[0135] For the scenario of three transmitters mentioned above, the reliability of PLC communication is improved by repeatedly sending signals in two orthogonal spatial directions or space-time directions.

[0136] For the quasi-orthogonal space-time codes of the three transmit ports mentioned above, there are three copying schemes:

[0137] (1) Copy scheme 1, copy 4 times, its quasi-orthogonal space-time code is shown in the above formula 9;

[0138] (2) Copy scheme 2, copy twice, s0 is transmitted in two directions in the first group, and s1 is transmitted in two directions in the second group. Its quasi-orthogonal space-time code is as follows:

[0139] (3) Copying scheme 3: copy twice. s0 and s1 are transmitted in two directions in the first group and then copied to the second group orthogonal to the first group. The quasi-orthogonal space-time code is as follows:

[0140] Three copying schemes exist for the quasi-orthogonal space-time codes of the three transmit ports. A control field can be included in the transmitted signal. This control field can consist of two bits, with the corresponding values ​​of these two bits corresponding to: "00" for no copying; "01" for copying scheme 1; "10" for copying scheme 2; and "11" for copying scheme 3. Both the first and second PLC nodes pre-store the correspondence between these copying schemes and control field values. Therefore, after the second PLC node receives the signal and parses the control field, it can accurately receive and demodulate the received signal based on the control field.

[0141] In this application, "sending information to... (e.g., a second PLC node)" or the related diagrams in the accompanying drawings can be understood as the destination end of the information being the second PLC node. This can include sending information to the second PLC node directly or indirectly. "Receiving information from... (e.g., a second PLC node)" or "receiving information from... (e.g., a second PLC node)", or the related diagrams in the accompanying drawings can be understood as the source end of the information being the second PLC node, this can include receiving information from the second PLC node directly or indirectly. The information may be processed as necessary between the source end and the destination end of the information transmission, such as format changes, etc., but the destination end can understand the valid information from the source end. Similar expressions in this application can be understood similarly and will not be repeated here.

[0142] The above description mainly describes the solutions provided by the embodiments of the present application from the perspective of interaction between various nodes. Accordingly, the embodiments of the present application also provide a PLC communication device, which is used to implement the above method. The PLC communication device can be the first PLC node in the above method embodiment, or a component that can be used for the first PLC node; alternatively, the PLC communication device can be the second PLC node in the above method embodiment, or a component that can be used for the second PLC node. It will be understood that, in order to implement the above functions, the PLC communication device includes hardware structures and / or software modules corresponding to performing each function. Those skilled in the art will readily appreciate that, in combination with the various exemplary units and algorithm steps described in the embodiments disclosed herein, the present application can be implemented in hardware or a combination of hardware and computer software. Whether a function is implemented in hardware or in a hardware-driven manner by computer software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0143] In the embodiment of the present application, the functional modules of the PLC communication device can be divided according to the above method embodiment. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing unit. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical functional division. In actual implementation, there may be other division methods.

[0144] Based on the same concept of the above-mentioned PLC communication method, the present application also provides the following PLC communication device:

[0145] As shown in FIG4 , it is a schematic diagram of the structure of a PLC communication device provided in an embodiment of the present application. The PLC communication device 400 includes a processing unit 410 and a transceiver unit 411 ; wherein,

[0146] When the PLC communication device 400 is used to implement the function of the first PLC node in the method embodiment shown in Figure 3: the processing unit 410 is used to implement step S301 in the embodiment shown in Figure 3, and the transceiver unit 411 is used to implement the function of the first PLC node in step S302 in the embodiment shown in Figure 3.

[0147] A more detailed description of the processing unit 410 and the transceiver unit 411 can be directly obtained by referring to the relevant description in the method embodiment shown in FIG3 , and is not repeated here.

[0148] As shown in Figure 5, a schematic diagram of the structure of another PLC communication device provided in an embodiment of the present application is shown. The PLC communication device 500 includes a processor 510 and may also include an interface circuit 520. The processor 510 and the interface circuit 520 are coupled to each other. It is understood that the interface circuit 520 can be a transceiver or an input / output interface. Optionally, the PLC communication device 500 may also include a memory 530 (indicated by a dotted line in the figure) for storing instructions executed by the processor 510, or storing input data required by the processor 510 to execute instructions, or storing data generated after the processor 510 executes instructions.

[0149] When the PLC communication device 500 is used to implement the function of the first PLC node in the method embodiment shown in Figure 3: the processor 510 is used to implement step S301 in the embodiment shown in Figure 3, and the interface circuit 520 is used to implement the function of the first PLC node in step S302 in the embodiment shown in Figure 3.

[0150] A more detailed description of the processor 510 and the interface circuit 520 can be directly obtained by referring to the relevant description in the method embodiment shown in FIG3 , and is not repeated here.

[0151] The division of modules in this application is illustrative and represents only a logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional modules in the examples of this application may be integrated into a single processor, exist physically as separate modules, or two or more modules may be integrated into a single module. The aforementioned integrated modules may be implemented in either hardware or software functional modules.

[0152] It is understood that the processor in the embodiments of the present application may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0153] An embodiment of the present application further provides a computer-readable storage medium, in which a computer program or instruction is stored. When the computer program or instruction is executed, the method in the above embodiment is implemented.

[0154] An embodiment of the present application further provides a computer program product comprising instructions, which, when executed on a computer, enables the computer to execute the method in the above embodiment.

[0155] An embodiment of the present application further provides a communication system, including the first PLC node and the second PLC node mentioned above.

[0156] The present application also provides a circuit, which is coupled to a memory and is used to execute the method shown in the above embodiment. The circuit may include a chip circuit.

[0157] When the communication device is a module applied to a first PLC node, the first PLC node module implements the functions of the first PLC node in the above method embodiment. The first PLC node module receives information from other modules in the first PLC node, where the information is sent from the second PLC node to the first PLC node; or the first PLC node module sends information to other modules in the first PLC node, where the information is sent from the first PLC node to the second PLC node.

[0158] It should be noted that the above units or one or more of the units can be implemented by software, hardware, or a combination of the two. When any of the above units or units is implemented by software, the software exists in the form of computer program instructions and is stored in a memory, and a processor can be used to execute the program instructions and implement the above method flow.

[0159] In this application, a processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or all or part of the circuitry in the aforementioned devices used to implement processing functions, which may implement or execute the various methods, steps, and logic block diagrams disclosed in this application. A general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the methods disclosed in this application may be directly implemented as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor.

[0160] When the above units or units are implemented in hardware, the hardware can be any one or any combination of a CPU, a microprocessor, a DSP chip, a microcontroller unit (MCU), an artificial intelligence processor, an ASIC, a SoC, an FPGA, a PLD, a dedicated digital circuit, a hardware accelerator or a non-integrated discrete device, which can run the necessary software or not rely on the software to execute the above method flow.

[0161] Optionally, an embodiment of the present application further provides a chip system, comprising: at least one processor and an interface, wherein the at least one processor is coupled to a memory via the interface, and when the at least one processor executes a computer program or instruction in the memory, the chip system executes the method in any of the above method embodiments. Optionally, the chip system may be composed of a chip, or may include a chip and other discrete devices, which is not specifically limited in the embodiments of the present application.

[0162] The memory in the present application may also be a circuit or any other device capable of implementing a storage function for storing program instructions and / or data. A memory is any other medium that can be used to carry or store a desired program code in the form of an instruction or data structure and can be accessed by a computer, but is not limited thereto. For example, the memory may be a non-volatile memory, such as a digital versatile disc (DVD), a hard disk drive (HDD), or a solid-state drive (SSD), or a volatile memory, such as a random-access memory (RAM).

[0163] It should be understood that in the description of this application, unless otherwise specified, " / " indicates that the objects associated with each other are in an "or" relationship. For example, A / B can mean A or B, where A and B can be singular or plural. Furthermore, in the description of this application, unless otherwise specified, "multiple" means two or more than two. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or plural. In addition, to facilitate the clear description of the technical solutions of the embodiments of this application, in the embodiments of this application, words such as "first" and "second" are used to distinguish between identical or similar items with substantially the same functions and effects. Those skilled in the art will understand that words such as "first" and "second" do not limit the quantity or order of execution, and words such as "first" and "second" do not necessarily mean different. At the same time, in the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner to facilitate understanding.

[0164] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using a software program, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means.

[0165] Although the present application is described herein in conjunction with various embodiments, in the process of implementing the claimed application, those skilled in the art can understand and implement other changes to the disclosed embodiments by reviewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude multiple situations. A single processor or other unit can implement several functions listed in the claims. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0166] It is understood that the various numbers used in the embodiments of this application are merely for ease of description and are not intended to limit the scope of the embodiments of this application. The order of the sequence numbers of the above-mentioned processes does not necessarily imply a specific order of execution; the order of execution of the processes should be determined by their functions and inherent logic.

[0167] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0168] The components in the device of the embodiment of the present application can be merged, divided, or deleted according to actual needs. Those skilled in the art can combine or combine the different embodiments and features of the different embodiments described in this specification.

[0169] In this application, under the premise of no logical contradiction, the examples can reference each other, for example, the methods and / or terms between method embodiments can reference each other, for example, the functions and / or terms between device embodiments can reference each other, for example, the functions and / or terms between device examples and method examples can reference each other.

Claims

1. A PLC communication method, characterized in that: The method comprises: generating a first signal, wherein the first signal is repeated in n orthogonal spatial directions or space-time directions; The first signal is sent in the n orthogonal spatial directions or space-time directions in the m-dimensional linear space, where m and n are positive integers, and m≥n.

2. The method according to claim 1, characterized in that The first signal includes a control field, and the control field is used to indicate that the first signal is repeated in n orthogonal spatial directions or space-time directions.

3. The method according to claim 1 or 2, characterized in that The m=2, the n=2, the first signal is sent via two transmitters, and the first signal s0 satisfies: Among them, y(0) is the received signal at time 0, y * (1) is the conjugate of the received signal y(1) at the first moment, h0 is the channel gain from the first transmitter to the receiving antenna, h1 is the channel gain from the second transmitter to the receiving antenna, n(0) is the noise at the 0th moment, n * (1) is the conjugate of the noise n(1) at the first moment, is the conjugate of h0, is the conjugate of h1; First Direction Second direction The first direction and the second direction are orthogonal to each other.

4. The method according to claim 1 or 2, characterized in that: The m=4, the n=3, the first signal is sent via three transmitters, and the first signal s0 satisfies: Among them, y(0) is the received signal at time 0, y * (1) is the conjugate of the received signal y(1) at the first moment, y * (2) is the conjugate of the received signal y(2) at the second moment, y * (3) is the conjugate of the received signal y(3) at the third moment, h0 is the channel gain from the first transmitter to the receiving antenna, h1 is the channel gain from the second transmitter to the receiving antenna, h2 is the channel gain from the third transmitter to the receiving antenna, n(0) is the noise at the 0th moment, n * (1) is the conjugate of the noise n(1) at the first moment, n * (2) is the conjugate of the noise n(2) at the second moment, n * (3) is the conjugate of the noise n(3) at the third moment, is the conjugate of h0, is the conjugate of h1, is the conjugate of h2; First Direction Second direction The third direction The first direction, the second direction and the third direction are orthogonal to each other.

5. The method according to claim 1 or 2, characterized in that: The m=4, the n=4, the first signal is sent via three transmitters, and the first signal s0 satisfies: Among them, y(0) is the received signal at time 0, y * (1) is the conjugate of the received signal y(1) at the first moment, y * (2) is the conjugate of the received signal y(2) at the second moment, y(3) is the received signal at the third moment, h0 is the channel gain from the first transmitter to the receiving antenna, h1 is the channel gain from the second transmitter to the receiving antenna, h2 is the channel gain from the third transmitter to the receiving antenna, n(0) is the noise at the 0th moment, n * (1) is the conjugate of the noise n(1) at the first moment, n * (2) is the conjugate of the noise n(2) at the second moment, n * (3) is the conjugate of the noise n(3) at the third moment, is the conjugate of h0, is the conjugate of h1, is the conjugate of h2; First Direction Second direction The third direction The fourth direction The first direction is orthogonal to the second direction and the third direction, the fourth direction is orthogonal to the second direction and the third direction, the second direction is orthogonal to the first direction and the fourth direction, and the third direction is orthogonal to the first direction and the fourth direction.

6. The method according to any one of claims 1 to 5, characterized in that The first signal is also repeated on multiple time-frequency domain resources.

7. A PLC communication device, characterized in that: The device comprises: a processing unit and a transceiver unit; wherein: The processing unit is configured to generate a first signal, wherein the first signal is repeated in n orthogonal spatial directions or space-time directions; The transceiver unit is used to send the first signal in the n orthogonal spatial directions or space-time directions in the m-dimensional linear space, where m and n are positive integers, and m≥n.

8. The device according to claim 7, characterized in that The first signal includes a control field, and the control field is used to indicate that the first signal is repeated in n orthogonal spatial directions or space-time directions.

9. The device according to claim 7 or 8, characterized in that The m=2, the n=2, the first signal is sent via two transmitters, and the first signal s0 satisfies: Among them, y(0) is the received signal at time 0, y * (1) is the conjugate of the received signal y(1) at the first moment, h0 is the channel gain from the first transmitter to the receiving antenna, h1 is the channel gain from the second transmitter to the receiving antenna, n(0) is the noise at the 0th moment, n * (1) is the conjugate of the noise n(1) at the first moment, is the conjugate of h0, is the conjugate of h1; First Direction Second direction The first direction and the second direction are orthogonal to each other.

10. The device according to claim 7 or 8, characterized in that The m=4, the n=3, the first signal is sent via three transmitters, and the first signal s0 satisfies: Among them, y(0) is the received signal at time 0, y * (1) is the conjugate of the received signal y(1) at the first moment, y * (2) is the conjugate of the received signal y(2) at the second moment, y * (3) is the conjugate of the received signal y(3) at the third moment, h0 is the channel gain from the first transmitter to the receiving antenna, h1 is the channel gain from the second transmitter to the receiving antenna, h2 is the channel gain from the third transmitter to the receiving antenna, n(0) is the noise at the 0th moment, n * (1) is the conjugate of the noise n(1) at the first moment, n * (2) is the conjugate of the noise n(2) at the second moment, n * (3) is the conjugate of the noise n(3) at the third moment, is the conjugate of h0, is the conjugate of h1, is the conjugate of h2; First Direction Second direction The third direction The first direction, the second direction and the third direction are orthogonal to each other.

11. The device according to claim 7 or 8, characterized in that The m=4, the n=4, the first signal is sent via three transmitters, and the first signal s0 satisfies: Among them, y(0) is the received signal at time 0, y * (1) is the conjugate of the received signal y(1) at the first moment, y * (2) is the conjugate of the received signal y(2) at the second moment, y(3) is the received signal at the third moment, h0 is the channel gain from the first transmitter to the receiving antenna, h1 is the channel gain from the second transmitter to the receiving antenna, h2 is the channel gain from the third transmitter to the receiving antenna, n(0) is the noise at the 0th moment, n * (1) is the conjugate of the noise n(1) at the first moment, n * (2) is the conjugate of the noise n(2) at the second moment, n * (3) is the conjugate of the noise n(3) at the third moment, is the conjugate of h0, is the conjugate of h1, is the conjugate of h2; First Direction Second direction The third direction The fourth direction The first direction is orthogonal to the second direction and the third direction, the fourth direction is orthogonal to the second direction and the third direction, the second direction is orthogonal to the first direction and the fourth direction, and the third direction is orthogonal to the first direction and the fourth direction.

12. The device according to any one of claims 7 to 11, characterized in that The first signal is also repeated on multiple time-frequency domain resources.

13. A PLC communication device, characterized in that: The device comprises a processor and an interface circuit, wherein the interface circuit is used to receive signals from other devices outside the device and transmit them to the processor, or to send signals from the processor to other devices outside the device, and the processor is used to implement the method as described in any one of claims 1 to 6 through a logic circuit or executing code instructions.

14. A chip, characterized in that: The chip is used to execute the method according to any one of claims 1 to 6.

15. A chip module, characterized in that: The invention comprises a transceiver component and a chip, wherein the chip is used to execute the method according to any one of claims 1 to 6.

16. A computer-readable storage medium, characterized in that: The storage medium stores a computer program or instruction. When the computer program or instruction is executed by the PLC communication device, the method according to any one of claims 1 to 6 is implemented.

17. A computer program product, characterized in that The computer program product comprises program instructions, and when the program instructions are executed, the method according to any one of claims 1 to 6 is implemented.

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