A method of monitoring a BPLC communication network

Abstract

The application discloses a BPLC communication network monitoring method, which is applied to track circuit monitoring, and the BPLC communication network comprises at least one communication networking, and the communication networkings are connected through relay circuit modules, and comprises the following steps: S100, setting a power line carrier channel of a communication networking to be scanned as a management channel, performing carrier scanning on the management channel, and the management channel being different from the power line carrier channel of each communication networking; S200, judging whether a new power line carrier terminal node is scanned, if yes, performing step S300, and if not, performing step S400; S300, setting a power line carrier channel of the new power line carrier terminal node as a power line carrier initial channel of the communication networking to be scanned, and restoring the power line carrier channel of the communication networking to be scanned to the power line carrier initial channel; and S400, restoring the power line carrier channel of the communication networking to be scanned to the power line carrier initial channel.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power line carrier communication, in particular to a BPLC communication network monitoring method. BACKGROUND

[0002] At present, in the track circuit monitoring application, when a train drives from a distance to a station, the sensors of the power line carrier terminal nodes along the way will report the situation to the station control room to ensure that the train is running normally and the nearby environment is effectively monitored. Its communication networking is mainly G3-modem or HPLC technology, but the increasing nodes and monitoring range will reduce the bandwidth, and the delay is large, which has been a pain point in the industry.

[0003] With the increasing busy of railway development, the requirement for track circuit monitoring will only be higher and higher. Although the traditional broadband power line carrier technology can provide sufficient bandwidth and low delay, the connection distance cannot exceed 1.0km. Adding nodes in the existing track network, there are trains passing by on the running railway, and the time area for arranging installation or modifying equipment is very short. If the on-site installation is arranged by skilled personnel, the cost is high and the efficiency is low, and long time waiting or working on the track will also increase the safety risk.

[0004] Therefore, it is urgent to develop a power line carrier communication monitoring technology which can support remote management and remote configuration, reduce on-site working time on the track, and provide sufficient bandwidth and low delay for long-distance connection, to meet the updated higher track circuit monitoring requirements. SUMMARY

[0005] Based on the above status, the main purpose of the present application is to provide a BPLC communication network monitoring method which can be installed simply, support remote management and configuration, reduce on-site working time on the track, and provide sufficient bandwidth and low delay for long-distance connection under the condition of existing communication wire and resource.

[0006] To achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0007] The application discloses a BPLC communication network monitoring method, which is applied to track circuit monitoring, and the BPLC communication network comprises at least one communication network, and the communication networks are connected through relay circuit modules. The method comprises the following steps: S100, setting a power line carrier channel of a communication network to be scanned as a management channel, and performing carrier scanning on the management channel, wherein the management channel is different from a power line carrier channel of each communication network; S200, judging whether a new power line carrier terminal node is scanned, if yes, performing step S300, and if not, performing step S400; S300, setting a power line carrier channel of the new power line carrier terminal node as a power line carrier initial channel of the communication network to be scanned, and restoring the power line carrier channel of the communication network to be scanned to the power line carrier initial channel; and S400, restoring the power line carrier channel of the communication network to be scanned to the power line carrier initial channel.

[0008] Preferably, the carrier scanning on the management channel in the step S100 comprises scanning MAC addresses of the power line carrier terminal nodes on the management channel through Ethernet.

[0009] Preferably, the step S200 judges whether the new power line carrier terminal node is scanned, which comprises judging whether a MAC address not in a MAC address table is detected, wherein the MAC address table comprises MAC addresses of communication devices on the BPLC communication network.

[0010] Preferably, the step S300 further comprises saving the MAC address not in the MAC address table into the MAC address table.

[0011] Preferably, after the step S300 restores the power line carrier channel of the communication network to be scanned to the power line carrier initial channel, the method further comprises performing carrier scanning on the power line carrier initial channel, and updating a network node connection topology of the communication network to be scanned according to a scanning result.

[0012] Preferably, the relay circuit module comprises a first carrier module and a second carrier module, the first carrier module is connected with a previous stage communication network, the second carrier module is connected with a next stage communication network, and the first carrier module and the second carrier module are connected through an Ethernet; the power line carrier frequency channels of the previous stage communication network and the next stage communication network connected with each relay circuit module are different, the working frequency channel of the first carrier module is the power line carrier frequency channel of the previous stage communication network, and the working frequency channel of the second carrier module is the power line carrier frequency channel of the next stage communication network; the first carrier module receives data transmitted by the previous stage communication network and forwards the data to the second carrier module through the Ethernet, and the second carrier module transmits the data to the next stage communication network.

[0013] Preferably, the working mode of the first carrier module is a terminal mode, and the working mode of the second carrier module is a local mode.

[0014] Preferably, the power line carrier frequency channel of each communication network is a low frequency channel obtained by 1 / 8 frequency division of the BPLC full frequency band, and the management frequency channel is a frequency channel obtained by 1 / 8 frequency division of the BPLC full frequency band except the low frequency channel.

[0015] Preferably, the spectrum of the low frequency channel is 0.25MHz-3.5MHz, 3.75MHz-7.0MHz, 7.25MHz-10.5MHz or 10.75MHz-14MHz, and the spectrum of the management frequency channel is 0.5MHz-7.0MHz or 7.5MHz-14MHz.

[0016] Preferably, the method sequentially performs the steps S100 to S400 on each communication network starting from the first stage communication network of the BPLC communication network.

[0017] The technical scheme of the application reserves one frequency channel as a management frequency channel, and the default configuration of the power line carrier terminal node STA out of the factory can be the management frequency channel. When a new power line carrier terminal node is added in the track network, the power line carrier frequency channel of the communication network to be executed is modified, it is inquired whether the new power line carrier terminal node is added, and the carrier frequency channel of the newly added power line carrier terminal node is dynamically modified, so that the newly added node can join the communication network and work normally. The application provides a BPLC communication network monitoring method which can be installed simply under the existing communication wire and resource conditions, supports remote management and configuration, reduces the on-site work time, avoids on-site monitoring and debugging of workers, reduces the cost and on-site work risk, can be connected remotely, provides sufficient bandwidth and low latency, and is suitable for updating higher track circuit monitoring requirements.

[0018] Other beneficial effects of the present invention will be explained in detail through the introduction of specific technical features and technical solutions in specific embodiments. Those skilled in the art should be able to understand the beneficial technical effects brought about by these technical features and technical solutions through the introduction of these technical features and technical solutions. Attached Figure Description

[0019] The preferred embodiment of the BPLC communication network monitoring method according to the present invention will now be described with reference to the accompanying drawings. In the drawings:

[0020] Figure 1 This is a flowchart of a BPLC communication network monitoring method according to a preferred embodiment of the present invention;

[0021] Figure 2 This is a block diagram of a relay circuit module according to a preferred embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of a BPLC communication network according to a preferred embodiment of the present invention;

[0023] Figure 4 In order to be in Figure 3 The topology diagram of the network nodes of the BPLC communication network;

[0024] Figure 5 In order to be in Figure 3 A schematic diagram of adding a power line carrier terminal node in a BPLC communication network;

[0025] Figure 6 To be Figure 5 A schematic diagram of the first-level communication network in a BPLC communication network after the power line carrier is modified to a management channel;

[0026] Figure 7 for Figure 6 The topology diagram of the network nodes performing carrier scanning in the first-level communication network of the BPLC communication network;

[0027] Figure 8 To be Figure 5 A schematic diagram of the second-level communication network in a BPLC communication network after the power line carrier is modified to a management channel;

[0028] Figure 9 for Figure 8 A topology diagram of network nodes performing carrier scanning in a BPLC communication network for the second-level communication network.

[0029] Figure 10 To be Figure 5 A schematic diagram of the third-level communication network in a BPLC communication network after the power line carrier is modified to a management channel;

[0030] Figure 11 for Figure 10 A topology diagram of network nodes performing carrier scanning in a BPLC communication network for a third-level communication network.

[0031] Figure 12 To Figure 5 The topology diagram of the network nodes after network monitoring of the BPLC communication network. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0034] In the description of this invention, unless otherwise explicitly defined, terms such as "setup" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0035] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0036] Figure 1 This is a flowchart of a BPLC communication network monitoring method according to a preferred embodiment of the present invention. The method is applied to track circuit monitoring. The BPLC communication network includes at least one level of communication network, and the communication networks are connected through relay circuit modules. The method includes the following steps:

[0037] S100, set the power line carrier frequency channel of the communication network to be scanned as a management frequency channel, and perform carrier scanning on the management frequency channel, which is different from the power line carrier frequency channel of each level of communication network;

[0038] S200, determine whether a new power line carrier terminal node is scanned, if yes, execute step S300, otherwise execute step S400;

[0039] S300, set the power line carrier frequency channel of the new power line carrier terminal node as the power line carrier initial frequency channel of the communication network to be scanned, and restore the power line carrier frequency channel of the communication network to be scanned to the power line carrier initial frequency channel;

[0040] S400, restore the power line carrier frequency channel of the communication network to be scanned to the power line carrier initial frequency channel.

[0041] In a specific embodiment, the BPLC communication network can include a central coordinator (CCO), a plurality of relay circuit modules and a plurality of power line carrier terminal nodes STA (Station), the communication link between the central coordinator and the first relay circuit module usually constitutes the first level of communication network, and each communication network has its own power line carrier initial frequency channel. The latest power carrier chip can be used, which conforms to the IEEE 1901-2020 standard and provides dynamic allocation of spectrum and bandwidth functions to dynamically allocate frequency channels for each communication network.

[0042] The technical scheme of the application reserves one frequency channel as a management frequency channel, and the power line carrier terminal node STA can be configured as the management frequency channel by default when it leaves the factory. When a new power line carrier terminal node is added in the track network, the power line carrier frequency channel of the communication network to be scanned is modified to inquire whether a new power line carrier terminal node is added, and the carrier frequency channel of the newly added power line carrier terminal node is dynamically modified, so that the newly added node can join the communication network and work normally. The application provides a BPLC communication network monitoring method which can be installed simply, supports remote management and configuration, reduces on-site work time, avoids on-site monitoring and debugging of workers, reduces cost and on-site work risk, can be connected remotely, provides a BPLC communication network monitoring method with sufficient bandwidth and low latency, and is suitable for updating higher track circuit monitoring requirements.

[0043] In a preferred embodiment, the carrier scanning on the management channel in step S100 can include scanning the MAC address of the power line carrier terminal node on the management channel through Ethernet. In a specific embodiment, all the relay circuit modules and the power line carrier terminal nodes in the BPLC communication network have their own MAC addresses, and the carrier scanning can be performed by scanning the MAC addresses of the devices on the management channel through Ethernet.

[0044] In a preferred embodiment, the judging whether a new power line carrier terminal node is scanned in step S200 can include judging whether a MAC address not in the MAC address table is detected, the MAC address table including the MAC addresses of the communication devices in the BPLC communication network. In a specific embodiment, the CCO in the BPLC communication network can store the MAC address table, which stores the MAC addresses of the communication devices in the BPLC communication network. When a new power line carrier terminal node is added to the BPLC communication network, the MAC address of the new device in the original MAC address table can be found by scanning the MAC addresses of the devices on the management channel through Ethernet, which is the MAC address of the new power line carrier terminal node, so that it can be judged that a new power line carrier terminal node is scanned.

[0045] In a preferred embodiment, step S300 can further include saving the MAC address not in the MAC address table into the MAC address table. Specifically, if a new power line carrier terminal node is scanned, the MAC address of the power line carrier terminal node can be saved into the original MAC address table, so as to facilitate the subsequent network monitoring. If it is found that a MAC address in the original MAC address table is not in the communication network in the scanning, the MAC address in the MAC address table can be deleted.

[0046] In a preferred embodiment, after the power line carrier channel of the communication network to be scanned is restored to the power line carrier initial channel in step S300, the power line carrier initial channel can be further scanned, and the network node connection topology of the communication network to be scanned can be updated according to the scanning result. That is, the new power line carrier terminal node can be updated to the communication network to be scanned.

[0047] In a preferred embodiment, as shown in FIG. 1, the CCO 101 can be connected to the power line carrier terminal node 102 through the power line carrier channel, and the CCO 101 can be connected to the power line carrier terminal node 103 through the power line carrier channel. Figure 2As shown, the relay circuit module can include a first carrier module and a second carrier module, the first carrier module is connected with the previous stage communication network, the second carrier module is connected with the next stage communication network, the first carrier module and the second carrier module are connected through Ethernet, the power line carrier frequency channels of the previous stage communication network and the next stage communication network connected by each relay circuit module are different, that is, ch-A and ch-B are different, the working frequency channel of the first carrier module is the power line carrier frequency channel ch-A of the previous stage communication network, the working frequency channel of the second carrier module is the power line carrier frequency channel ch-B of the next stage communication network, wherein the first carrier module receives the data transmitted by the previous stage communication network, and forwards the data to the second carrier module through Ethernet, and the second carrier module transmits the data to the next stage communication network. In this way, the data transmission on the BPLC communication network is completed.

[0048] The relay circuit module adopts a frequency-modulated carrier hybrid relay design, uses two different frequency channel carrier modules, connects the carrier local end signal input of the previous stage, exchanges data through Ethernet, and outputs the signal of the local end of the other frequency channel of the next stage. Support directional routing protocol naming, can repeatedly cascade connect multiple groups of relay circuits, and can solve the long-distance, high-bandwidth, and low-delay of track circuit monitoring.

[0049] In a preferred embodiment, the working mode of the first carrier module is terminal mode, and the working mode of the second carrier module is local mode. Specifically, the terminal mode can generally refer to a device without relay forwarding capability in the BPLC communication network, which can also be called a non-relay mode, for example, STA is a terminal mode device, and the local mode refers to a device with relay forwarding capability, which can also be called a relay mode, for example, CCO device and PCO device are local mode devices.

[0050] In a preferred embodiment, the power line carrier frequency channel of each communication network is a low frequency channel obtained by dividing the BPLC full frequency band by 1 / 8, and the management frequency channel is a frequency channel obtained by dividing the BPLC full frequency band by 1 / 8, except for the low frequency channel.

[0051] In the BPLC technology, the full frequency band of BPLC is 2-28MHz, the full frequency band of BPLC will get two channels ch2 and ch3 after 1 / 2 frequency division, the spectrum of channel ch2 and ch3 from low to high is 1MHz-14MHz and 15MHz-28MHz respectively, the full frequency band of BPLC will get four channels ch4-ch7 after 1 / 4 frequency division, the spectrum of channel ch4-ch7 from low to high is 0.5MHz-7MHz, 7.5MHz-14MHz, 14.5MHz-21MHz and 21.5MHz-28MHz respectively, the full frequency band of BPLC will get eight channels ch8-ch15 after 1 / 8 frequency division, the spectrum of channel ch8-ch15 from low to high is 0.25MHz-3.5MHz, 3.75MHz-7.0MHz, 7.25MHz-10.5MHz, 10.75MHz-14MHz, 14.25-17.5MHz, 17.75MHz-21MHz, 21.25MHz-24.5MHz and 24.75MHz-28MHz respectively. In theory, all channels can be used as power line carrier channels for communication networking, but considering that the attenuation of high frequency signal is relatively obvious with the increase of distance, the higher the frequency, the shorter the communication distance, after repeated testing and verification, ch-8 (0.25MHz-3.5MHz), ch-9 (3.75MHz-7.0MHz), ch-10 (7.25MHz-10.5MHz) and ch11 (10.75MHz-14MHz) are used as power line carrier communication channels, which can ensure the communication distance and bandwidth requirement. If the carrier network only needs to be within 1km, other channels can also be used.

[0052] In a preferred embodiment, the management channel can be preset. For example, the STA device is factory-set with a default management channel, which can be any channel other than the communication networking power line carrier channel, preferably ch-4 (0.5MHz-7.0MHz) or ch-5 (7.5MHz-14MHz) as described above. The communication distance of ch-4 is farther than that of ch-5, and the signal transmission is more stable and less susceptible to interference.

[0053] In a preferred embodiment, the BPLC communication network monitoring method of the present application can perform steps S100-S302 on each communication network in turn from the first level communication network of the BPLC communication network.

[0054] Figure 3This is a schematic diagram of a BPLC communication network according to a preferred embodiment of the present invention. It includes a power line carrier central office (CCO), whose carrier channel is adjustable, and is therefore also called an FM carrier central office; two power line carrier terminals (STAs), whose carrier channels are adjustable, and are also called FM carrier terminals; and two relay circuit modules. Both the first and second relay circuit modules include a first carrier module and a second carrier module, which are connected via Ethernet. Each of the FM carrier terminals, the two power line carrier terminals, and the carrier modules in the relay circuit modules has its own MAC address. The MAC address of the FM carrier central office is 05:15, and the MAC addresses of the two power line carrier terminals are 01:13 and 01:34, respectively. The MAC addresses of the carrier modules in the first relay circuit module are 01:28 and 02:23, respectively, and the MAC addresses of the carrier modules in the second relay circuit module are 03:45 and 02:38, respectively. Figure 3 The CCP demonstrates a three-level communication network: Level 1 is the communication between the FM carrier central office and the first carrier module within the first relay circuit module; Level 2 is the communication between the second carrier module within the first relay circuit module and the first carrier module within the second relay circuit module; and Level 3 is the communication between the second carrier module within the second relay circuit module and the subsequent modules. The initial power line carrier channel for Level 1 is ch-9, for Level 2 it is ch-8, and for Level 3 it is ch-10. The FM carrier central office sends communication signals, which are then modulated onto the power lines for transmission after passing through the distribution cabinet. Figure 4 for Figure 3 The topology diagram of the network nodes of the BPLC communication network is as follows: Master corresponds to the frequency modulation carrier central office, S1 corresponds to the first carrier module in the first relay circuit module, M2 corresponds to the second carrier module in the first relay circuit module, S2 (MAC 02:23) corresponds to the power line carrier terminal, S2 (MAC 03:45) corresponds to the first carrier module in the second relay circuit module, M2 corresponds to the second carrier module in the second relay circuit module, and S3 corresponds to the power line carrier terminal (MAC 02:55).

[0055] like Figure 5 As shown, the dashed lines indicate the newly added... Figure 3 The power line carrier terminal in the BPLC communication network shown has a MAC address of 01:34. When a new terminal is added to the communication network, the technical solution of this invention can be used to scan and detect the communication network.

[0056] like Figure 6As shown, the power line carrier channel of the first level communication network can be modified to the management channel ch-4 first. After carrier scanning, no new node is found, and the corresponding node connection topology diagram is as shown in the upper part of Figure 7 the node connection topology diagram of the network in the above. Since the power line carrier channel of the first level communication network is the management channel ch-4, at this time, the carrier scanning cannot scan the communication nodes behind. The power line carrier channel of the first level communication network is restored to ch-9, and the new scanning will appear as shown in the lower part of Figure 7 the node connection topology diagram of the network, that is, the starting node connection topology diagram of the network as shown in Figure 4 the upper part of

[0057] Next, as shown in Figure 8 , the carrier channel of the second level communication network is modified to the management channel ch-4, and after carrier scanning, a new node MAC 01:34 is found, and the corresponding node connection topology diagram is as shown in the upper part of Figure 9 the node connection topology diagram of the network. The system modifies the carrier channel of the newly connected power line carrier terminal node to the original channel ch-8 of the second level communication network, and then restores the carrier channel ch-8 of the second level communication network. The new scanning will appear as shown in the lower part of Figure 9 the node connection topology diagram of the network, that is, the updated node connection topology diagram of the network.

[0058] Finally, as shown in Figure 10 , the carrier channel of the third level communication network is modified to the management channel ch-4, and after carrier scanning, no new node is found, and the corresponding node connection topology diagram is as shown in Figure 11 . Since the power line carrier channel of the third level communication network is the management channel ch-4, at this time, the carrier scanning cannot scan the communication nodes behind. The system restores the carrier channel ch-10 of the third level communication network, and there is no next level communication network. The BPLC communication network monitoring is completed, and the new scanning will appear the updated node connection topology diagram of the network as shown in Figure 12 .

[0059] The BPLC communication network monitoring method of the application is a plug-and-play method that can automatically correct the registration of the access network channel. When a new terminal device is installed to the network, the system can perform the naming of the directed routing protocol. All terminal devices have a default management channel, and when naming is performed, the system will change the communication channel level by level, monitor whether a new node terminal is added, and then modify its application channel according to the current network configuration. When the system returns to normal operation, the latest network node connection topology diagram is automatically recorded. Only a simple installation method is needed, which can greatly reduce the time of technical personnel on-site installation and maintenance of equipment, reduce the working risk of workers near the track, reduce the influence of adding or deleting nodes on normal operation, and increase the efficiency.

[0060] Figures 3 to 12 The process of monitoring step by step from the first communication network is shown in the above embodiment, in other embodiments, the monitoring can be directly performed on the communication network with new nodes, so that time can be saved.

[0061] In particular, according to the above-mentioned embodiments of the present application, the process described in the above embodiments can be implemented as a computer program. For example, the embodiments of the present application also provide a computer program product comprising a computer program loaded on a computer readable medium, the computer program comprising program codes for executing the BPLC communication network monitoring method of the present application. In such embodiments, the computer program can be downloaded and installed from the network through the communication interface, or installed from the memory. When the computer program is executed by the processor, the above-mentioned functions defined in the above-mentioned embodiments of the method are executed.

[0062] It should be noted that the above-mentioned computer readable medium can include but is not limited to: can include volatile memory (volatile memory), such as random access memory (random access memory, RAM); the memory can also include non-volatile memory (non-volatile memory), such as read-only memory (read-only memory, ROM), flash memory (flash memory), hard disk (hard disk drive, HDD) or solid-state drive (solid-statedrive, SSD); the memory can also include a combination of the above types of memory.

[0063] In the present application, the computer readable storage medium can be any tangible medium containing or storing a program, which can be used or combined with an instruction execution system, device or apparatus.

[0064] The above-mentioned computer readable medium can be contained in the above-mentioned electronic device; it can also exist separately and not be assembled into the electronic device.

[0065] In an optional embodiment, the embodiments of the present application also provide a computer storage medium, which can be used for computer software instructions, comprising a computer program, which is executed by a processor to execute the BPLC communication network monitoring method as described in the above-mentioned embodiments. The storage medium includes but is not limited to flash memory, hard disk, solid-state drive.

[0066] It should be noted that the step numbers (letter or number) are used in the present application to refer to certain specific method steps, merely for the purpose of convenience and brevity of description, and by no means to limit the order of the method steps by the letter or number.

[0067] It is understood by those skilled in the art that the above-mentioned preferred embodiments can be freely combined and superimposed, without conflict.

[0068] It should be understood that the above-mentioned embodiments are merely exemplary and non-limiting, and various obvious or equivalent modifications or replacements to the above-mentioned details can be made by those skilled in the art without departing from the essential principles of the present application, which shall be included in the scope of the claims of the present application.

Claims

1. A method of monitoring a BPLC communication network, characterized by, The method is applied to track circuit monitoring, the BPLC communication network comprises at least one level of communication networking, the communication networkings are connected through relay circuit modules, and the method comprises the steps of: S100, setting a power line carrier frequency channel of a communication networking to be scanned as a management frequency channel, and performing carrier scanning on the management frequency channel, wherein the management frequency channel is different from a power line carrier frequency channel of each level of communication networking; S200, judging whether a new power line carrier terminal node is scanned, if yes, performing step S300, and if not, performing step S400; S300, setting a power line carrier frequency channel of the new power line carrier terminal node as a power line carrier initial frequency channel of the communication networking to be scanned, and restoring the power line carrier frequency channel of the communication networking to be scanned to the power line carrier initial frequency channel; S400, restoring the power line carrier frequency channel of the communication networking to be scanned to the power line carrier initial frequency channel; The relay circuit module comprises a first carrier module and a second carrier module, the first carrier module is connected with a previous level of communication networking, the second carrier module is connected with a next level of communication networking, and the first carrier module and the second carrier module are connected through an Ethernet; The power line carrier frequency channels of the previous level of communication networking and the next level of communication networking connected with each relay circuit module are different, a working frequency channel of the first carrier module is a power line carrier frequency channel of the previous level of communication networking, and a working frequency channel of the second carrier module is a power line carrier frequency channel of the next level of communication networking; The first carrier module receives data transmitted by the previous level of communication networking, and forwards the data to the second carrier module through the Ethernet, and the second carrier module transmits the data to the next level of communication networking.

2. The BPLC communication network monitoring method of claim 1, characterized in that, The carrier scanning on the management frequency channel in step S100 comprises: Scanning a MAC address of a power line carrier terminal node on the management frequency channel through the Ethernet.

3. The BPLC communication network monitoring method of claim 2, wherein, The step S200 judging whether a new power line carrier terminal node is scanned comprises: Judging whether a MAC address not in a MAC address table is detected, wherein the MAC address table comprises MAC addresses of communication devices on the BPLC communication network.

4. The BPLC communication network monitoring method of claim 3, wherein, The step S300 further comprises: saving the MAC address not in the MAC address table into the MAC address table.

5. The BPLC communication network monitoring method of claim 1, wherein, After the step S300 of restoring the power line carrier frequency channel of the communication networking to be scanned to the power line carrier initial frequency channel, the method further comprises: Performing carrier scanning on the power line carrier initial frequency channel, and updating a networking node connection topology of the communication networking to be scanned according to a scanning result.

6. The BPLC communication network monitoring method of claim 1, wherein, The working mode of the first carrier module is a terminal mode, and the working mode of the second carrier module is a local mode.

7. The BPLC communication network monitoring method of claim 1, wherein, The power line carrier frequency channel of each communication networking is a low frequency channel obtained by dividing the whole frequency band of the BPLC by 8, and the management frequency channel is a frequency channel obtained by dividing the whole frequency band of the BPLC by 8, except the low frequency channel.

8. The BPLC communication network monitoring method according to claim 7, characterized in that, the low frequency channel has a spectrum of 0.25-3.5 MHz, 3.75-7.0 MHz, 7.25-10.5 MHz or 10.75-14 MHz; the management channel has a spectrum of 0.5-7.0 MHz or 7.5-14 MHz.

9. The BPLC communication network monitoring method according to any one of claims 1-8, characterized in that, the method performs the steps S100-S400 successively for each communication network starting from a first communication network of the BPLC communication network.

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