A power line communication system, a power line communication method and a device

Abstract

The application relates to the technical field of power line communication, and discloses a power line communication system, a power line communication method and equipment, which are used for solving the problem of channel blockage of the power line communication system, reducing time delay, and realizing rapid adjustment of a central coordinator to a station. The power line communication system comprises the central coordinator and the station, the central coordinator is connected with the station through a power line, the central coordinator has a first channel and a second channel, the central coordinator is used for sending an interrupt signal to the station through the second channel before sending a first service frame to the station, and sending the first service frame to the station through the first channel after a set time length; the station has a third channel and a fourth channel, the station is used for interrupting the sending of a second service frame to the central coordinator through the third channel after receiving the interrupt signal through the fourth channel, vacating a channel of the power line communication system, and then receiving the first service frame through the third channel; and the frequency band of the interrupt signal is different from the frequency bands of the first service frame and the second service frame.

Description

Technical Field

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

[0002] Power line communication (PLC) is a communication technology that uses power lines as the communication medium to transmit signals via carrier waves. The electronic devices involved in communication within a PLC system can include a central coordinator (CCO), a proxy coordinator (PCO), and stations (STAs). The CCO can schedule or control STAs by sending control frames, while STAs can report their equipment status by sending service frames to the CCO. The PCO can assist STAs that are geographically distant from the CCO in accessing the PLC network.

[0003] In long-distance communication scenarios, the communication frequency band of the PLC system is relatively low, which leads to a significant reduction in the effective transmission bandwidth of the PLC system and a noticeable increase in the time it takes for the STA to send service frames to the CCO. Since service frames and control frames are on the same frequency band, when the channel is used to transmit low-priority service frames, high-priority control frames can only be transmitted and demodulated sequentially after a low-priority service frame has completed. This results in increased control channel latency, making it impossible for the CCO to quickly adjust the STA, and the scheduling latency cannot meet the requirements and specifications of the PLC system. Summary of the Invention

[0004] This application provides a power line communication system, power line communication method, and device to solve the problem of channel congestion in power line communication systems, reduce latency, and enable the central coordinator to quickly schedule stations.

[0005] In a first aspect, this application provides a power line communication system, which may include a central coordinator and stations connected via a power line. The central coordinator may have a first channel and a second channel, each connected to a first end of the power line. The central coordinator may send an interrupt signal to the station via the second channel before sending a first service frame, and then send the first service frame to the station via the first channel after a set duration. The station may have a third channel and a fourth channel, each connected to a second end of the power line. After receiving the interrupt signal via the fourth channel, the station may interrupt the transmission of a second service frame to the central coordinator via the third channel, thus freeing up the power line communication system's channels, and then receive the first service frame via the third channel. The frequency band of the interrupt signal is different from the frequency bands of the first and second service frames.

[0006] In the above scheme, when the central coordinator needs to schedule stations promptly, and the channel used to transmit the first service frame is occupied by the second service frame, the central coordinator can send an interrupt signal to the station via the second channel before sending the first service frame. This interrupt signal can be transmitted to the station via another channel on the power line. After receiving the interrupt signal, the station can interrupt the transmission of the second service frame to the central coordinator via the third channel, thereby freeing up the corresponding channel. In this way, the central coordinator can preempt the freed-up channel and send the first service frame to the station promptly. Therefore, this scheme can effectively solve the channel congestion problem in power line communication systems, reduce transmission latency, and enable the central coordinator to quickly schedule stations.

[0007] In some possible implementations, the first and second channels of the central coordinator can both be understood as logical channels, which can be implemented by the same physical channel or by different physical channels. Similarly, the third and fourth channels on the STA side are also logical channels, which can be implemented by the same physical channel or by different physical channels.

[0008] In some possible implementations, the interrupt signal may be of the following types, including but not limited to pulse signals, single-tone or double-tone signals, M-sequences, etc.

[0009] In some possible implementations, the power line communication system may also include a first coupler disposed on the central coordinator side, which may be disposed near a first end of the power line, for coupling signals transmitted by the central coordinator into the power line, and coupling signals from the site side in the power line into the central coordinator.

[0010] Similarly, the power line communication system may also include a second coupler located at the site side, which may be located near the second end of the power line, for coupling signals transmitted from the site into the power line, and for coupling signals from the power line from the central coordinator side into the site.

[0011] In some possible implementations, the first channel may include a first transmit channel and a first receive channel, and the central coordinator may be used to send a first service frame to the site through the first transmit channel and to receive a second service frame through the first receive channel.

[0012] In a specific implementation, a first amplifier may be provided between the first transmission channel and the first end of the power line. In this case, the central coordinator may also be used to turn on the first amplifier before sending the first service frame to the station through the first transmission channel, thereby opening the first transmission channel so that the first service frame can be transmitted to the power line along the first transmission channel.

[0013] In addition, a second amplifier can be installed between the second channel and the first end of the power line. The central coordinator can also be used to turn on the second amplifier before sending an interruption signal to the station through the second channel, thereby opening the second channel so that the interruption signal can be sent out smoothly.

[0014] In some possible implementations, the third channel may include a third transmit channel and a third receive channel, specifically used by a station to send a second service frame to the central coordinator via the third transmit channel and to receive a first service frame via the third receive channel.

[0015] In a specific implementation, a third amplifier can be installed between the third transmission channel and the second end of the power line. In this case, the station can use the third amplifier to shut down after receiving an interruption signal through the fourth channel, thereby shutting down the third transmission channel, interrupting the transmission of the second service frame to the central coordinator, and freeing up the channel.

[0016] In some possible implementations, the central coordinator can also be used to clear the transmission buffer data after sending an interruption signal to the station via the second channel, in order to reduce the risk of errors in the content of the first service frame sent subsequently and improve the accuracy of signal transmission.

[0017] In some possible implementations, the site can also be used to clear the transmit buffer data and receive buffer data after the transmission of the second service frame to the central coordinator is interrupted, in order to reduce the risk of errors in the content of the received first service frame and the subsequently retransmitted second service frame, and improve the accuracy of signal transmission.

[0018] Secondly, this application also provides a power line communication method, which can be applied to a central coordinator in a power line communication system. The central coordinator has a first channel and a second channel, which are respectively connected to a first end of a power line. The method includes:

[0019] Before sending the first service frame to the station in the power line communication system, an interrupt signal is sent to the station through the second channel;

[0020] After sending an interrupt signal to the site for a set duration, the first service frame is sent to the site through the first channel;

[0021] The frequency band of the interrupt signal is different from that of the first service frame.

[0022] In the above scheme, the central coordinator can send an interrupt signal to the station via a second channel before sending the first service frame. This interrupt signal can be transmitted to the station via another channel on the power line. After receiving the interrupt signal, the station vacates the corresponding channel, allowing the central coordinator to preempt the vacated channel and promptly send the first service frame to the station. Therefore, this scheme effectively solves the channel congestion problem in power line communication systems, reduces transmission latency, and enables the central coordinator to quickly schedule stations.

[0023] In some possible implementations, the first channel may include a first transmission channel and a first reception channel. The method further includes: sending a first service frame to the station through the first transmission channel and receiving a second service frame through the first reception channel.

[0024] In some possible implementations, the above method may further include: after sending an interrupt signal to the station through the second channel, clearing the transmission buffer data to reduce the risk of errors in the content of the first service frame sent subsequently and to improve the accuracy of signal transmission.

[0025] Thirdly, this application also provides a power line communication method, which can be applied to a station in a power line communication system. The station has a third channel and a fourth channel, which are respectively connected to the second end of the power line. The method includes:

[0026] After receiving the interrupt signal through the fourth channel, the interrupt sends the second service frame to the central coordinator through the third channel, freeing up the channel of the power line communication system, and then receives the first service frame through the third channel.

[0027] The frequency band of the interrupt signal is different from that of the second service frame.

[0028] In the above scheme, after receiving an interruption signal, the station can interrupt the transmission of the second service frame to the central coordinator on the third channel, thereby freeing up the corresponding channel. The central coordinator can then preempt the freed-up channel and promptly transmit the first service frame to the station. Therefore, this scheme effectively solves the channel congestion problem in power line communication systems, reduces transmission latency, and enables the central coordinator to quickly schedule stations.

[0029] In some possible implementations, the third channel may include a third transmit channel and a third receive channel. The method further includes: sending a second service frame to the central coordinator through the third transmit channel and receiving a first service frame through the third receive channel.

[0030] In some possible implementations, the above method may further include: after interrupting the transmission of the second service frame to the central coordinator via the third channel, clearing the transmit buffer data and receive buffer data to reduce the risk of errors in the content of the received first service frame and the subsequently retransmitted second service frame, thereby improving the accuracy of signal transmission.

[0031] Fourthly, this application also provides a central coordinator including at least one processor coupled to at least one memory, the at least one processor being configured to read a computer program stored in the at least one memory to execute the method of any possible implementation of the second aspect above.

[0032] Fifthly, this application also provides an electronic device including at least one processor coupled to at least one memory, the at least one processor being configured to read a computer program stored in the at least one memory to perform the method of any possible implementation of the third aspect above.

[0033] In a sixth aspect, this application also provides a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the method in any possible implementation of the second aspect or the method in any possible implementation of the third aspect.

[0034] In a seventh aspect, this application also provides a computer program product that, when run on a computer, causes the computer to perform the method in any possible implementation of the second aspect or the method in any possible implementation of the third aspect. Attached Figure Description

[0035] Figure 1 A schematic diagram of a PLC system provided in an embodiment of this application;

[0036] Figure 2This is an architecture diagram of a power line communication system provided in an embodiment of this application;

[0037] Figure 3 This is a schematic diagram of the specific structure of the power line transmission system provided in the embodiments of this application;

[0038] Figure 4 This is a flowchart illustrating the power line communication method provided in an embodiment of this application. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. The same reference numerals in the figures denote the same or similar structures, and therefore repeated descriptions of them will be omitted. The terms expressing position and direction described in the embodiments of this application are illustrative based on the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this application. The accompanying drawings of the embodiments of this application are only for illustrating relative positional relationships and do not represent actual scale.

[0040] It should be noted that specific details are set forth in the following description to facilitate understanding of this application. However, the embodiments of this application can be implemented in many ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the embodiments of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0041] PLC (Power Line Control) is a communication technology that uses power lines as the communication medium and transmits signals via carrier waves. A major advantage of PLC over other communication technologies is that it can utilize existing power lines as the transmission medium, eliminating the need to install new lines and significantly reducing initial deployment costs. Furthermore, it eliminates the need for separate line maintenance, further reducing subsequent maintenance costs.

[0042] Based on the State Grid's technical specifications for interconnection and interoperability of broadband carrier communication on low-voltage power lines, the Institute of Electrical and Electronics Engineers (IEEE) standard 1901.1 was officially released and implemented. This standard divides the PLC protocol stack into the following layers: application layer, transport layer, network layer, data link layer, and physical layer. The data link layer includes a network management sublayer and a medium access control (MAC) sublayer. The network management sublayer is responsible for the aggregation and fragmentation of application layer messages, network management, and route updates and maintenance. The MAC sublayer is responsible for preempting physical channels to provide reliable communication. The physical layer is responsible for encoding and modulating data from the MAC sublayer before sending it to the power line, and for demodulating and decoding signals received from the power line before sending them back to the MAC sublayer.

[0043] The PLC system will be further introduced below. Figure 1 This is a schematic diagram of a PLC system provided in an embodiment of this application. (Reference) Figure 1 In a PLC system, the electronic devices that communicate include the Central Coordinator (CCO), the Platform Control Center (PCO), and the Stations on the STA (STA). The CCO acts as the PLC gateway, responsible for network management, such as managing the network status of PCOs and STAs within the PLC network. The PCO can assist STAs that are geographically distant from the CCO in accessing the PLC network, manage the device status of STAs connected to the PCO, and report the device status of STAs connected to the PCO to the CCO. It should be noted that in this embodiment, the PCO can also be called a proxy station, and the STA can also be called a discovery station. Unless otherwise specified, in this embodiment, "station" refers to the discovery station (STA). For example, refer to... Figure 1 PCO1-PCO3 are proxy sites, and STA1-STA9 are discovery sites.

[0044] In this embodiment, the Control Center (CCO) can send a first service frame to one or more STAs. Exemplarily, this first service frame can be a control frame, used to schedule or control one or more STAs. One or more STAs can report their own device status by sending a second service frame to the CCO. Exemplarily, the CCO includes, but is not limited to, a digital data acquisition unit (DJU), and the STAs include, but are not limited to, inverters.

[0045] In long-distance communication scenarios, the communication frequency band of the PLC system is relatively low, which leads to a significant reduction in the effective transmission bandwidth of the PLC system and a noticeable increase in the time it takes for the STA to send service frames to the CCO. Since service frames and control frames are on the same frequency band, when the channel is used to transmit low-priority service frames, high-priority control frames can only be transmitted and demodulated sequentially after a low-priority service frame has completed. This results in increased control channel latency, making it impossible for the CCO to quickly schedule the STA, and the scheduling latency cannot meet the requirements and specifications of the PLC system.

[0046] In view of this, embodiments of this application provide a power line communication system in which the Control Center (CCO) can send a preamble signal before sending a control frame to the STA. Upon detecting the preamble signal, the STA shuts down the transmission of service frames, thereby freeing up the channel. This allows the CCO to send a control frame to the STA after preempting the channel, achieving rapid scheduling of the STA. The embodiments of this application will be further described in detail below with reference to the accompanying drawings and specific examples.

[0047] refer to Figure 2 As shown, Figure 2 This is an architecture diagram of a power line communication system provided in an embodiment of this application. In this embodiment, the Control Center (CCO) may include a first channel and a second channel, which are respectively connected to a first end a of the power line. The CCO can be used to send a first service frame to the STA via the first channel, and to receive a second service frame sent by the STA, and to send an interrupt signal to the STA via the second channel. The STA may include a third channel and a fourth channel, which are respectively connected to a second end b of the power line. The STA can be used to send a second service frame to the CCO via the third channel, and to receive a first service frame sent by the CCO, and to receive an interrupt signal sent by the CCO via the fourth channel.

[0048] It should be noted that, in this embodiment, the first and second channels on the CCO side can both be understood as logical channels. They can be implemented by the same physical channel or by different physical channels, and this application does not impose any restrictions on this. Similarly, the third and fourth channels on the STA side are also logical channels, and they can be implemented by the same physical channel or by different physical channels.

[0049] In some embodiments, the power line communication system may further include a first coupler disposed on the CCO side, which is located near a first end a of the power line. This first coupler couples signals transmitted by the CCO into the power line and signals from the STA in the power line to the CCO, thereby isolating the signals from the high voltage in the power line. Exemplarily, the first coupler may include, but is not limited to, a transformer. Similarly, the power line communication system may further include a second coupler disposed on the STA side, which is located near a second end b of the power line. This second coupler couples signals transmitted by the STA into the power line and signals from the CCO in the power line to the STA, thereby isolating the signals from the high voltage in the power line. Exemplarily, the second coupler may include, but is not limited to, a transformer.

[0050] In this embodiment, the first service frame and the second service frame operate in the same frequency band and are transmitted on the power line using time-division multiplexing to improve the utilization of limited spectrum resources in the power line communication system. For example, the first and second service frames may be approximately in the 0.5MHz to 2.1MHz frequency band. The interrupt signal operates in a different frequency band than the first and second service frames, therefore the interrupt signal and the first and second service frames can be transmitted on different channels of the power line. In specific implementations, the frequency band of the interrupt signal may be lower or higher than the frequency bands of the first and second service frames; this application does not impose any limitations on this. For example, the frequency band of the interrupt signal may be less than 0.3MHz. Furthermore, the type of interrupt signal includes, but is not limited to, pulse signals, single-tone or dual-tone signals, M-sequences, etc.

[0051] In practical implementation, when the CCO needs to schedule or adjust the STA in a timely manner, and the channel used to transmit the first service frame is occupied by a low-priority second service frame, the CCO can send the aforementioned interrupt signal to the STA through the second channel before sending the first service frame. This interrupt signal can be transmitted to the STA through another channel on the power line. After receiving the interrupt signal, the STA can interrupt the transmission of the second service frame to the CCO through the third channel, thereby freeing up the corresponding channel. After sending the interrupt signal to the STA, the CCO can send the first service frame to the STA through the first channel after a set time, thereby preempting the freed-up channel and promptly conveying control commands to the STA. In addition, in this embodiment, after the CCO sends the interrupt signal to the STA, the operating frequency band of the first service frame can be extended to the frequency band used by the interrupt signal. That is, in the uplink direction, the bandwidth used by the first service frame is expanded, thus it can carry more information, thereby helping to further reduce latency.

[0052] The aforementioned set duration refers to the time used by the first service frame to preempt the channel. This duration can be set based on the transmission duration of the interrupt signal between the CCO and STA. It is understood that the set duration must be at least greater than the transmission duration of the interrupt signal to ensure that the STA has received the interrupt signal and interrupted the transmission of the second service frame when the CCO sends the first service frame. For example, in this embodiment, the interrupt signal can be designed as an ultra-short frame to increase the transmission rate of the interrupt signal and shorten the set duration. Furthermore, the set duration is at least less than or significantly less than the transmission duration of a second service frame between the STA and CCO, so that the time for the first service frame to preempt the channel is less than the remaining transmission duration of the currently transmitted service frame, thereby reducing latency.

[0053] Please refer to the above. Figure 3 As shown, Figure 3 This is a schematic diagram of the specific structure of the power line transmission system provided in this application embodiment. In this application embodiment, the first service frame, the second service frame, and the interrupt signal can all be transmitted in the form of differential signals to improve the signal's anti-interference capability. The first channel may include a first transmit channel TX1 and a first receive channel RX1. Specifically, the CCO can be used to send the first service frame to the STA through the first transmit channel TX1 and to receive the second service frame sent by the STA through the first receive channel RX1. A first amplifier LD1 may be provided on the first transmit channel TX1. The first amplifier LD1 can amplify the first service frame sent by the CCO and then couple it to the power line through a first coupler. A first filter F1 may be provided on the first receive channel RX1. The first filter F1 can be used to filter the second service frame transmitted by the STA before it is demodulated by the CCO.

[0054] Furthermore, as mentioned earlier, the first service frame sent by the CCO to the STA and the second service frame sent by the STA to the CCO are transmitted within different time periods. Therefore, when the first receive channel RX1 is receiving the second service frame, the first transmit channel TX1 can be turned off, and when it is necessary to send the first service frame to the STA, the first transmit channel TX1 can be turned on. For example, the switching on and off of the first transmit channel TX1 can be achieved through the first amplifier LD1. For instance, the CCO can turn on the first transmit channel TX1 by turning on the first amplifier LD1 and turn off the first transmit channel TX1 by turning off the first amplifier LD1.

[0055] For example, in some possible embodiments, the CCO can also be used to turn on the first amplifier LD1 before sending the first service frame to the STA via the first transmit channel TX1, thereby turning on the first transmit channel TX1 so that the first service frame can be transmitted along the first transmit channel TX1 to the first coupler, and further coupled to the power line by the first coupler.

[0056] Based on the same principle, a second amplifier LD2 can also be installed on the second channel. LD2 amplifies the interrupt signal sent by the CCO and then couples it to the power line via the first coupler. Additionally, LD2 can also be used to open or close the second channel. For example, when the CCO and STA are normally transmitting the first or second service frame, the CCO can close the second channel by turning off LD2. When the first service frame needs to preempt the channel, the CCO can turn on LD2 before sending the interrupt signal to the STA, thus opening the second channel and allowing the interrupt signal to be transmitted smoothly.

[0057] Similarly, the third channel may include a third transmit channel TX3 and a third receive channel RX3. Specifically, the STA can use the third transmit channel TX3 to send a second service frame to the CCO, and the third receive channel RX3 to receive a first service frame sent by the CCO. A third amplifier LD3 may be installed on the third transmit channel TX3, which amplifies the second service frame sent by the STA and then couples it to the power line via a second coupler. A second filter F2 may be installed on the third receive channel, which filters the first service frame transmitted from the CCO before demodulation by the STA.

[0058] Similarly, since the second service frame sent by the STA to the CCO and the first service frame sent by the CCO to the STA are transmitted in different time periods, the third transmit channel TX3 can be turned on when the STA sends the second service frame to the CCO, and the third transmit channel TX3 can be turned off when the first service frame is received through the third receive channel RX3. For example, the turning on and off of the third transmit channel TX3 can be achieved through the third amplifier LD3. The STA can turn on the third transmit channel TX3 by turning on the third amplifier LD3 and turn off the third transmit channel TX3 by turning off the third amplifier LD3. For instance, in one specific embodiment, the STA can turn off the third amplifier LD3 after receiving an interrupt signal through the fourth channel, thereby turning off the third transmit channel TX3, interrupting the transmission of the second service frame to the CCO, and freeing up the channel.

[0059] In addition, a third filter F3 can also be provided on the fourth channel. The third filter F3 can be used to filter the interrupt signal transmitted by the CCO and then demodulate it by the STA. Depending on the signal type of the interrupt signal, it can be correlated demodulation or uncorrelated demodulation. This application does not make any specific limitation on this.

[0060] In some embodiments, the CCO can also be used to clear the transmission buffer data after sending an interrupt signal to the STA via the second channel, so as to reduce the risk of errors in the content of the first service frame sent subsequently and improve the accuracy of signal transmission.

[0061] In some embodiments, the STA can also be used to clear the receive buffer data and transmit buffer data after the transmission of the second service frame to the CCO via the third channel is interrupted, so as to reduce the risk of errors in the content of the received first service frame and the subsequently retransmitted second service frame, and improve the accuracy of signal transmission.

[0062] Based on the same inventive concept, embodiments of this application also provide a power line communication method. (Reference) Figure 4 As shown, Figure 4 This is a flowchart illustrating the power line communication method provided in an embodiment of this application. Figure 4 The communication method shown can be derived from Figure 1 The CCO and STA in the power line communication system shown are executed as described in the previous embodiments, and will not be repeated here. This communication method may include the following steps:

[0063] Before sending the first service frame to the STA, S101 and CCO send an interrupt signal to the STA through the second channel.

[0064] In this configuration, the first and second service frames operate on the same frequency band, while the interrupt signal operates on a different frequency band. Therefore, the interrupt signal can be transmitted on a different channel of the power line than the first and second service frames. Thus, when the CCO needs to schedule or adjust the STA in a timely manner, and the channel used to transmit the first and second service frames is occupied by the lower-priority second service frame, the CCO can send the aforementioned interrupt signal to the STA via a second channel before sending the first service frame. This interrupt signal can then be transmitted to the STA via another channel of the power line.

[0065] In some possible embodiments, the CCO may also clear the transmission buffer data after sending an interrupt signal to the STA, in order to reduce the risk of errors in the content of the first service frame sent subsequently and improve the accuracy of signal transmission.

[0066] In some possible embodiments, the first channel may include a first receive channel and a first transmit channel, through which the CCO can transmit a first service frame to the STA. Additionally, the CCO may activate a first amplifier to open the first transmit channel before transmitting the first service frame to the STA. Furthermore, when the first service frame needs to preempt the channel, the CCO may activate a second amplifier to open a second channel before sending an interrupt signal to the station.

[0067] After receiving the interrupt signal sent by the STA through the fourth channel, the interrupt sends the second service frame to the CCO through the third channel, thereby freeing up the corresponding channel.

[0068] In some possible embodiments, the STA may also clear the receive buffer data and transmit buffer data after interrupting the transmission of the second service frame to the CCO, so as to reduce the risk of errors in the content of the received first service frame and the subsequently retransmitted second service frame, and improve the accuracy of signal transmission.

[0069] In some possible embodiments, the third channel may include a third receive channel and a third transmit channel, through which the STA can transmit the second service frame to the CCO. The STA may also, upon receiving an interrupt signal, turn off the third amplifier, shut down the third transmit channel, interrupt the transmission of the second service frame to the CCO, and free up the channel.

[0070] After S103 and CCO send an interrupt signal to the STA for a set duration, they send the first service frame to the STA through the first channel, thereby preempting the vacated channel and promptly transmitting control commands to the STA.

[0071] The aforementioned set duration can be configured based on the transmission duration of the interrupt signal between the CCO and STA. It is understood that the set duration must be at least greater than the transmission duration of the interrupt signal to ensure that the STA has received the interrupt signal and interrupted the transmission of the second service frame when the CCO sends the first service frame. Furthermore, the set duration must be at least less than or significantly less than the transmission duration of a second service frame between the STA and CCO, so that the time the first service frame preempts the channel is less than the remaining transmission duration of the currently transmitted second service frame, thereby reducing latency.

[0072] S104, STA receives the first service frame sent by CCO through the third channel, enabling CCO to quickly adjust STA.

[0073] Based on the above embodiments, this application also provides a power line communication method. This communication method can be executed by the CCO and STA in the power line communication system. The configuration of the CCO and STA can be referred to the description in the foregoing embodiments, and will not be repeated here. The communication method may include the following steps:

[0074] Before sending the first service frame to the STA, the CCO sends an interrupt signal to the STA through the second channel; the STA receives the interrupt signal through the fourth channel and then stops sending the second service frame to the CCO through the third channel.

[0075] After the CCO sends an interrupt signal to the STA for a set duration, it sends the first service frame to the STA through the first channel; the STA receives the first service frame sent by the CCO through the third channel.

[0076] Based on the above embodiments, this application also provides a central coordinator, including multiple functional modules; the multiple functional modules interact to implement the functions performed by the central coordinator in the methods described in the embodiments of this application, such as performing... Figure 4 S101 and S103 are executed by the CCO in the illustrated embodiment. The plurality of functional modules can be implemented based on software, hardware, or a combination of software and hardware, and the plurality of functional modules can be arbitrarily combined or divided based on specific implementation.

[0077] Based on the above embodiments, this application also provides a central coordinator, which includes at least one processor and at least one memory. The at least one memory stores computer program instructions. When the central coordinator runs, the at least one processor executes the functions performed by the central coordinator in the various methods described in the embodiments of this application, such as executing... Figure 4 S101 and S103 are executed by the central coordinator in the illustrated embodiment.

[0078] Based on the above embodiments, this application also provides an electronic device, which includes multiple functional modules; the multiple functional modules interact to realize the functions performed by the stations in the methods described in the embodiments of this application, such as performing... Figure 4 The examples shown illustrate S102 and S104 executed by the site. These multiple functional modules can be implemented using software, hardware, or a combination of both, and can be arbitrarily combined or divided based on specific implementations.

[0079] Based on the above embodiments, this application also provides an electronic device, which includes at least one processor and at least one memory, wherein the at least one memory stores computer program instructions. When the electronic device is running, the at least one processor performs the functions performed by the stations in the various methods described in the embodiments of this application, such as executing... Figure 4 S102 and S104 are executed by the site in the illustrated embodiment.

[0080] Based on the above embodiments, this application also provides a computer program product containing instructions, which, when run on a computer, causes the computer to execute the methods described in the embodiments of this application.

[0081] Based on the above embodiments, this application also provides a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the methods described in the embodiments of this application.

[0082] Based on the above embodiments, this application also provides a chip for reading computer programs stored in a memory to implement the methods described in the embodiments of this application.

[0083] Based on the above embodiments, this application provides a chip system including a processor for supporting a computer device in implementing the methods described in the embodiments of this application. In one possible design, the chip system further includes a memory for storing necessary programs and data of the computer device. This chip system may be composed of chips or may include chips and other discrete devices.

[0084] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A power line communication system, characterized in that, It includes a central coordinator and stations, wherein the central coordinator and stations are connected via power lines, wherein, The central coordinator has a first channel and a second channel, which are respectively connected to a first end of the power line. The central coordinator is used to send an interrupt signal to the station through the second channel before sending the first service frame to the station, and to send the first service frame to the station through the first channel after a set time. The station has a third channel and a fourth channel, which are respectively connected to the second end of the power line; the station is used to interrupt the transmission of the second service frame to the central coordinator through the third channel after receiving the interruption signal through the fourth channel, and to receive the first service frame through the third channel. The frequency band of the interrupt signal is different from the frequency band of the first service frame and the second service frame.

2. The power line communication system as described in claim 1, characterized in that, The first channel includes a first transmit channel and a first receive channel, and the central coordinator is specifically used for: The first service frame is sent to the station through the first transmission channel, and the second service frame is received through the first reception channel.

3. The power line communication system as described in claim 2, characterized in that, A first amplifier is disposed between the first transmission channel and the first end of the power line, and the central coordinator is further configured to: Before sending the first service frame to the station through the first transmission channel, the first amplifier is turned on.

4. The power line communication system as described in any one of claims 1 to 3, characterized in that, A second amplifier is provided between the second channel and the first end of the power line, and the central coordinator is further used for: The second amplifier is turned on before an interrupt signal is sent to the station via the second channel.

5. The power line communication system as described in any one of claims 1 to 4, characterized in that, The third channel includes a third transmission channel and a third reception channel, and the station is specifically used for: The second service frame is sent to the central coordinator through the third transmission channel, and the first service frame is received through the third reception channel.

6. The power line communication system as described in claim 5, characterized in that, A third amplifier is provided between the third transmission channel and the second end of the power line, and the station is specifically used for: After receiving the interrupt signal through the fourth channel, the third amplifier is turned off, interrupting the transmission of the second service frame to the central coordinator through the third transmission channel.

7. The power line communication system as described in any one of claims 1 to 6, characterized in that, The central coordinator is also used for: After sending the interrupt signal to the station via the second channel, the transmission buffer data is cleared.

8. The power line communication system as described in any one of claims 1 to 7, characterized in that, The site is also used for: After interrupting the transmission of the second service frame to the central coordinator via the third channel, the transmit buffer data and receive buffer data are cleared.

9. A power line communication method, characterized in that, A central coordinator for use in a power line communication system, the central coordinator having a first channel and a second channel, the first channel and the second channel being respectively connected to a first end of a power line; the method includes: Before sending the first service frame to the station in the power line communication system, an interrupt signal is sent to the station through the second channel; After sending an interrupt signal to the site for a set duration, the first service frame is sent to the site through the first channel; The frequency band of the interrupt signal is different from the frequency band of the first service frame.

10. The power line communication method as described in claim 9, characterized in that, The first channel includes a first transmitting channel and a first receiving channel; the method further includes: The first service frame is sent to the station through the first transmission channel, and the second service frame is received through the first reception channel.

11. The power line communication method as described in claim 9 or 10, characterized in that, The method further includes: After sending the interrupt signal to the station via the second channel, the transmission buffer data is cleared.

12. A power line communication method, characterized in that, A station applied in a power line communication system, the station comprising a third channel and a fourth channel, the third channel and the fourth channel being respectively connected to a second end of the power line; the method comprising: After receiving the interrupt signal sent by the central coordinator in the power line communication system through the fourth channel, the interrupt sends a second service frame to the central coordinator through the third channel and receives the first service frame sent by the central coordinator through the third channel. The frequency band of the interrupt signal is different from the frequency band of the second service frame.

13. The power line communication method as described in claim 12, characterized in that, The third channel includes a third transmitting channel and a third receiving channel; the method further includes: After receiving the interrupt signal through the fourth channel, the interrupt sends the second service frame to the central coordinator through the third transmission channel and receives the first service frame through the third reception channel.

14. The power line communication method as described in claim 12 or 13, characterized in that, The method further includes: After interrupting the transmission of the second service frame to the central coordinator via the third channel, the transmit buffer data and receive buffer data are cleared.

15. A central coordinator, characterized in that, It includes at least one processor coupled to at least one memory, the at least one processor being configured to read a computer program stored in the at least one memory to perform the method as described in any one of claims 9 to 11.

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