Adjustable central coordinator for BPLC communication network and BPLC communication network comprising same

Abstract

The invention discloses an adjustable central coordinator for a BPLC communication network, which comprises a first broadband power line carrier communication module, a second broadband power line carrier communication module, a controller module and an Ethernet switch module, according to the configuration information, the working channel of the first broadband power line carrier communication module is set as a first channel through the Ethernet switch module, the working channel of the second broadband power line carrier communication module is set as a second channel, and the first broadband power line carrier communication module is set as a BPLC communication slave end; setting a second broadband power line carrier communication module as a BPLC communication main end, wherein the frequency spectrum of the first channel is different from the frequency spectrum of the second channel; the first broadband power line carrier communication module receives a BPLC signal transmitted by a first channel, the Ethernet switch module forwards the BPLC signal to the second broadband power line carrier communication module, and the second broadband power line carrier communication module transmits the BPLC signal on a second channel.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power line carrier communication, in particular to an adjustable central coordinator for a BPLC communication network and a BPLC communication network comprising the same. BACKGROUND

[0002] Power line carrier (PLC) is a communication technology that uses power lines to realize data transmission. Because it reuses the existing power line resources on the trackside, it does not need additional wiring and is widely used in railway communication, especially trackside communication. HPLC uses a 2-12MHz modulation frequency, and the maximum single-hop point-to-point distance is 1.5km. With multi-stage relaying, it can realize data communication over 10km or more. It is widely used in scenarios where the last generation of track circuit monitoring does not require high bandwidth.

[0003] However, the traditional PLC relay mode only uses the communication module as a relay to receive and forward data, solving the problem of signal attenuation and expanding the network coverage, but it does not help to solve the problem of insufficient bandwidth and large delay in long-distance communication. Moreover, when there are many PLC network nodes in the field and the power lines are close together or even bundled into a single power line, signal coupling and jumper problems are likely to occur.

[0004] Broadband power line carrier (BPLC) uses a 2-28MHz modulation frequency and Wavelet-OFDM supports 4096-QAM mode, using high-order OFDM modulation technology. Within the same modulation frequency band, BPLC has a larger bandwidth than HPLC. BPLC uses convolutional Turbo code, LDPC code, and interleaving technology to solve most errors, and then uses ARQ to cover the bottom and works with QAM to ensure stable and reliable high bandwidth. BPLC has been used in trackside switch monitoring applications for many years, and generally uses ADSL+BPLC or optical switch+BPLC hybrid networking, mainly applied to the end 500 meters within the switch gap and working condition monitoring. However, traditional BPLC has the problem of narrow effective bandwidth, short communication distance, and no relay protocol to realize chain multi-hop point-to-point networking for track circuit monitoring in the interval. SUMMARY

[0005] Based on the above status, the main purpose of the present application is to provide an adjustable central coordinator for a BPLC communication network and a BPLC communication network comprising the same, which can reduce the relay depth and improve the effective bandwidth, providing communication support for the remote real-time diagnosis of the new generation of train control system, intelligent operation and maintenance of trains, and state monitoring, and high-definition video monitoring.

[0006] To achieve the above purpose, the technical solution adopted by the present application is as follows: An adjustable central coordinator for a BPLC communication network, the adjustable central coordinator is used for track circuit monitoring, the adjustable central coordinator comprises a first broadband power line carrier communication module, a second broadband power line carrier communication module, a controller module and an Ethernet switch module, the controller module is connected with the Ethernet switch module through Ethernet, and the Ethernet switch module is connected with the first broadband power line carrier communication module and the second broadband power line carrier communication module respectively; the controller module is used for receiving configuration information, and setting a working channel of the first broadband power line carrier communication module as a first channel, setting a working channel of the second broadband power line carrier communication module as a second channel, setting the first broadband power line carrier communication module as a BPLC communication slave end, and setting the second broadband power line carrier communication module as a BPLC communication master end through the Ethernet switch module according to the configuration information, and a spectrum of the first channel is different from a spectrum of the second channel; the first broadband power line carrier communication module receives a BPLC signal transmitted through the first channel, the Ethernet switch module forwards the BPLC signal to the second broadband power line carrier communication module, and the second broadband power line carrier communication module transmits the BPLC signal on the second channel.

[0007] Preferably, the first channel is a first low-frequency channel obtained by dividing the BPLC full frequency band by 1 / 8, and the second channel is a second low-frequency channel obtained by dividing the BPLC full frequency band by 1 / 8.

[0008] Preferably, the spectrum of the first low-frequency channel is 0.25MHz-3.5MHz, 3.75MHz-7MHz, or 7.25MHz-10.5MHz; and the spectrum of the second low-frequency channel is 0.25MHz-3.5MHz, 3.75MHz-7MHz, or 7.25MHz-10.5MHz.

[0009] Preferably, the controller module receives the configuration information through Ethernet, an RS232 interface, or a GPIO interface.

[0010] Preferably, the controller module is connected with the first broadband power line carrier communication module and the second broadband power line carrier communication module through a serial interface, and the controller module is further used for setting a working channel and a working state of the first broadband power line carrier communication module and the second broadband power line carrier communication module through the serial interface, the working channel comprises the first channel and the second channel, and the working state comprises the slave end and the master end.

[0011] Preferably, the configuration information further comprises working mode information of the first wideband power line carrier communication module and the second wideband power line carrier communication module, and the working mode information comprises a relay mode and a non-relay mode.

[0012] The application further discloses a BPLC communication network for track circuit monitoring, which comprises the adjustable central coordinator according to any one of the application, and the adjustable central coordinator converts the BPLC communication network into at least two communication links, and each communication link works on a different frequency channel.

[0013] Preferably, the different frequency channels comprise a first low-frequency frequency channel, a second low-frequency frequency channel and a third low-frequency frequency channel obtained by dividing the full frequency band of the BPLC by 1 / 8, the frequency spectrum of the first low-frequency frequency channel is 0.25-3.5 MHz, the frequency spectrum of the second low-frequency frequency channel is 3.75-7 MHz, and the frequency spectrum of the third low-frequency frequency channel is 7.25-10.5 MHz.

[0014] Preferably, the relay depth of the BPLC communication network is N, when 4 < N < 8, the adjustable central coordinator is arranged at N / 2, and when N >= 8, one adjustable central coordinator is arranged every M proxy coordinators, and the M is 2 or 3.

[0015] Preferably, the BPLC communication network comprises a plurality of adjustable central coordinators according to the application, and the plurality of adjustable central coordinators are sequentially cascaded.

[0016] The adjustable central coordinator for the BPLC communication network of the application adopts two wideband power line carrier communication modules, an Ethernet switch and a controller module, the two wideband power line carrier communication modules and the controller module are converged and cascaded through the Ethernet switch, the controller module controls the two wideband power line carrier communication modules to work on different frequency channels and master-slave states respectively, the two wideband power line carrier communication modules do not produce interference in different frequency channels, and play a role of relay and extension of communication distance in the BPLC communication network. Meanwhile, the relay depth of each of the first frequency channel and the second frequency channel is reduced through the adjustable central coordinator, thereby increasing the effective bandwidth of each frequency channel. In addition, due to the low delay and high bandwidth characteristics of the BPLC communication network itself, it is more suitable for mixed networking of long and short distances, and provides communication guarantee for remote real-time diagnosis of the new generation train control system, intelligent operation and maintenance and state monitoring of trains and high-definition video monitoring.

[0017] Other beneficial effects of the application will be described in the specific implementation mode through the introduction of specific technical features and technical solutions, and those skilled in the art should be able to understand the beneficial technical effects brought by the technical features and technical solutions through the introduction of the technical features and technical solutions. BRIEF DESCRIPTION OF DRAWINGS

[0018] The following will describe the preferred embodiments of the adjustable central coordinator for BPLC communication network and the BPLC communication network comprising the same according to the present application with reference to the accompanying drawings. In the drawings: Figure 1 The circuit block diagram of the adjustable central coordinator for BPLC communication network according to one preferred embodiment of the present application; Figure 2 The circuit block diagram of the adjustable central coordinator for BPLC communication network according to another preferred embodiment of the present application; Figure 3 The circuit block diagram of the adjustable central coordinator for BPLC communication network according to yet another preferred embodiment of the present application; Figure 4 The schematic diagram of the PLC networking of the track circuit according to the prior art; Figure 5 The schematic diagram of the BPLC communication network for track single circuit monitoring according to one preferred embodiment of the present application; Figure 6 The schematic diagram of the BPLC communication network for track single circuit monitoring according to another preferred embodiment of the present application; Figure 7 The schematic diagram of the BPLC communication network for track single circuit monitoring according to yet another preferred embodiment of the present application. DETAILED DESCRIPTION

[0019] In order to make the objects, technical solutions and advantages of the present application clearer, the following will describe the technical solutions of the present application clearly and completely through embodiments with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0020] In the description of the present application, if the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, exceeding and the like are understood as not including the number, above, below, within and the like are understood as including the number. If it is described that the first, the second is only used for distinguishing the technical features for the purpose, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0021] In the description of the present application, unless otherwise explicitly limited, the setting and the like words should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solutions.

[0022] In the description of the application, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" and the like means that the specific features or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application. In the description, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0023] Figure 1 For a tunable central coordinator circuit block diagram for a BPLC communication network according to a preferred embodiment of the application, the tunable central coordinator (CCO, Central Coordinator) is used for track circuit monitoring, the tunable central coordinator includes a first broadband power line carrier communication module 100, a second broadband power line carrier communication module 200, a controller module 300 and an Ethernet switch module 400, the controller module 300 is connected with the Ethernet switch module 400 through Ethernet, the Ethernet switch module 400 is connected with the first broadband power line carrier communication module 100 and the second broadband power line carrier communication module 200 respectively; the controller module 300 is used for receiving configuration information, and setting the working channel of the first broadband power line carrier communication module 100 as a first channel and the working channel of the second broadband power line carrier communication module 200 as a second channel through the Ethernet switch module 400 according to the configuration information, and setting the first broadband power line carrier communication module 100 as a BPLC communication slave end and the second broadband power line carrier communication module 200 as a BPLC communication master end, the spectrum of the first channel is different from the spectrum of the second channel; the first broadband power line carrier communication module 100 receives the BPLC signal transmitted on the first channel, the Ethernet switch module 400 forwards the BPLC signal to the second broadband power line carrier communication module 200, and the second broadband power line carrier communication module 200 transmits the BPLC signal on the second channel.

[0024] The first broadband power line carrier communication module 100 and the second broadband power line carrier communication module 200 generally refer to a modem module capable of modulating Ethernet signals for transmission on power lines.

[0025] The adjustable central coordinator for the BPLC communication network of the present application adopts two broadband power line carrier communication modules, an Ethernet switch and a controller module, the two broadband power line carrier communication modules and the controller module are converged and cascaded through the Ethernet switch, the controller module controls the two broadband power line carrier communication modules to work in different frequency channels and master-slave states respectively, the two broadband power line carrier communication modules in different frequency channels do not produce interference and play a role of relaying and extending the communication distance in the BPLC communication network. At the same time, the adjustable central coordinator reduces the respective relay depths of the first frequency channel and the second frequency channel, thereby increasing the effective bandwidth of each frequency channel. In addition, due to the low delay and high bandwidth characteristics of the BPLC communication network itself, it is more suitable for mixed networking of long and short distances, and provides communication support for remote real-time diagnosis, train intelligent operation and maintenance and state monitoring, and high-definition video monitoring of the new generation of train control systems.

[0026] In a preferred embodiment, the configuration information can include working frequency channel information, working state information and the like of the first broadband power line carrier communication module 100 and the second broadband power line carrier communication module 200. The working state information includes a BPLC communication slave end and a BPLC communication master end.

[0027] In a preferred embodiment, the first frequency channel is a first low frequency channel obtained by dividing the BPLC full frequency band by 1 / 8, and the second frequency channel is a second low frequency channel obtained by dividing the BPLC full frequency band by 1 / 8.

[0028] In a specific embodiment, a power line carrier chip conforming to the IEEE 1901-2020 standard can be used, which provides the function of dynamically allocating spectrum and bandwidth and supports the frequency channel allocation as shown in Table 1. In Table 1, the highest bandwidth refers to the transmission speed of short distance (200m) connection, and the guaranteed bandwidth is the minimum bandwidth that can be guaranteed for connection and data transmission at a specified distance.

[0029] Table 1

[0030] The frequency modulation technology of broadband power line carrier can be used to cut 2-28MHz into 8 1 / 8 frequency bands f1-f8, corresponding to the frequency channels ch-8-ch-15 in Table 1. For example, ch-8 and ch-9 can be selected as the first low frequency channel and the second low frequency channel, ch-8 modulation frequency 0.25MHz-3.5MHz, ch-9 modulation frequency 3.75MHz-7MHz, the lower the modulation frequency band, the farther the point-to-point transmission distance.

[0031] In a preferred embodiment, the spectrum of the first low-frequency channel can be 0.25MHz-3.5MHz, 3.75MHz-7MHz, or 7.25MHz-10.5MHz; the spectrum of the second low-frequency channel can be 0.25MHz-3.5MHz, 3.75MHz-7MHz, or 7.25MHz-10.5MHz; it is also necessary to ensure that the spectrum of the first low-frequency channel is different from that of the second low-frequency channel. Higher frequency frequencies result in shorter communication distances, which is not practically valuable for track circuit monitoring. The high-frequency point should be controlled within 12MHz; therefore, channels ch-8, ch-9, and ch-10 are preferred.

[0032] In a preferred embodiment, the controller module 300 can receive the configuration information via Ethernet, an RS232 interface, or a GPIO interface. For example, the controller module 300 of the present invention may be a processor with embedded TCP / IP and a web configuration interface. The controller module 300 has complete network communication capabilities and runs a web server. The controller module 300 can receive the configuration information via Ethernet, and users can conveniently remotely access and configure the adjustable central coordinator of the present invention using any standard web browser. For example, a user can remotely send configuration information to the adjustable central coordinator of the present invention, and the controller module 300 can receive the configuration information and configure other modules accordingly. Users can also remotely access the first broadband power line carrier communication module 100 and the second broadband power line carrier communication module 200 to read the operating status information of these modules.

[0033] In a preferred embodiment, such as Figure 2 As shown, the controller module 300, the first broadband power line carrier communication module 100, and the second broadband power line carrier communication module 200 can also be connected via a serial interface. The controller module 300 is further used to set the working channels and working states of the first broadband power line carrier communication module 100 and the second broadband power line carrier communication module 200 through the serial interface. The working channels include the first channel and the second channel, and the working states include the BPLC communication slave end and the BPLC communication master end. In this embodiment, in the case of remote configuration, a method for local DIP configuration of copper via a serial interface is added, which can further meet the needs of on-site construction and provide convenient conditions for on-site construction.

[0034] In a preferred embodiment, the configuration information can further include working mode information of the first and second broadband power line carrier communication modules, the working mode information including a relay mode and a non-relay mode. A device with the relay mode is usually referred to as a PCO (Proxy Coordinator), which is a relay and proxy bridge of a BPLC communication network, and its core function is to forward data between a CCO and a remote STA (Station), solve the problem of signal attenuation, expand the network coverage, and also assist the CCO in managing subordinate STA nodes, while also having the basic functions of a STA. The non-relay mode refers to a STA (Station), a terminal node, which is usually referred to as a user terminal and has no relay forwarding capability. Corresponding entity devices include smart meters, charging piles, intelligent switches, and other terminal devices. For example, the controller module 300 can set the first broadband power line carrier communication module to the non-relay mode and set the second broadband power line carrier communication module to the relay mode.

[0035] In a preferred embodiment, when the first broadband power line carrier communication module 100 is set as a BPLC communication slave end, the first broadband power line carrier communication module 100 only receives the BPLC signal transmitted on the first frequency channel; and when the second broadband power line carrier communication module 200 is set as a BPLC communication master end, the second broadband power line carrier communication module 200 only transmits the BPLC signal on the second frequency channel. Specifically, the "master end" in a PLC communication network is the core hub of the network, which is responsible for creating the network, allocating communication resources, managing the access / offline state of all network nodes (PCO and STA), and also undertakes the core scheduling task of issuing instructions and data aggregation. The "slave end" in a PLC network is a terminal data acquisition / execution unit, which is only responsible for collecting its own data or receiving and executing control instructions issued by the CCO. When the first broadband power line carrier communication module 100 is set as a BPLC communication slave end, the first broadband power line carrier communication module 100 only receives the BPLC signal transmitted by the CCO on the first frequency channel, and can also collect its own data, but does not forward the received BPLC signal. However, the received BPLC signal is broadcasted and forwarded to the second broadband power line carrier communication module 200 through the Ethernet switch module. The second broadband power line carrier communication module 200 is set as a master end state, and has the function of data issuing. The second broadband power line carrier communication module 200 continues to send the BPLC signal on the second frequency channel. Since different channels are configured before and after, the influence between them is less, on the one hand, reducing the terminal signal coupling and jumper problem of different chains, and on the other hand, reducing the connection depth and improving the communication bandwidth.

[0036] In a preferred embodiment, as Figure 3As shown, the adjustable central coordinator can also include a power carrier signal isolator module 500 for filtering noise signals of the power line. For example, other frequency mechanical interference signals generated by other electrical devices on the power line.

[0037] The application also discloses a BPLC communication network for track circuit monitoring, which comprises the adjustable central coordinator according to any one of the application, and the adjustable central coordinator converts the BPLC communication network into at least two communication links, each of which works on a different frequency channel.

[0038] In a preferred embodiment, the different frequency channels can include a first low frequency channel, a second low frequency channel and a third low frequency channel obtained by dividing the full frequency band of the BPLC by 1 / 8. Specifically, the frequency spectrum of the first low frequency channel can be 0.25-3.5 MHz, the frequency spectrum of the second low frequency channel can be 3.75-7 MHz, and the frequency spectrum of the third low frequency channel can be 7.25-10.5 MHz.

[0039] In a preferred embodiment, the relay depth of at least two communication links in the BPLC communication network is N, when 4 Figure 4 As shown, it is a typical track circuit PLC networking, the number of PCOs is n, and the relay depth is n. When the relay depth N of at least two communication links in the BPLC communication network is greater than 4 and less than 8, for example, N is 5, the third PCO can be replaced by the adjustable central coordinator (adjustable CCO) in the application, and the adjustable CCO converts the original BPLC network from frequency channel f1 to f2, so that the networking depth of frequency channel f1 and the networking depth of frequency channel f2 are both reduced, and the effective bandwidth is improved. When N is greater than or equal to 8, for example, N is 8, one adjustable CCO can be set every 2 or 3 PCOs, and each adjustable CCO converts the previous frequency channel to the next frequency channel, thereby reducing the networking depth of each frequency channel and improving the bandwidth.

[0040] In a preferred embodiment, as shown in FIG. 6, the adjustable central coordinator can also include a power carrier signal isolator module 500 for filtering noise signals of the power line. For example, other frequency mechanical interference signals generated by other electrical devices on the power line. Figure 5As shown, the BPLC communication network can include a first tunable central coordinator, which converts the BPLC communication network into a first communication link (red link on the left side of the figure) and a second communication link (yellow link on the right side of the figure), the first communication link has a working frequency channel of a first frequency f1, the second communication network has a working frequency channel of a second frequency f2, a first broadband power line carrier communication module (BPLC module 1) in the first tunable central coordinator receives BPLC signals transmitted by the first communication link, an Ethernet switch module in the first tunable central coordinator forwards the BPLC signals to a second broadband power line carrier communication module (BPLC module 2) in the first tunable central coordinator, and the second broadband power line carrier communication module in the first tunable central coordinator transmits the BPLC signals in the second communication link.

[0041] Figure 5 In the first communication link, a CCO (A), two PCOs (PCO (A1) and PCO (A2)), and two STAs (STA (A1) and STA (A2)) are included, in the second communication link, two PCOs (PCO (B1) and PCO (B2)) and three STAs (STA (B1), STA (B2), and STA (B3)) are included, the first broadband power line carrier communication module (BPLC module 1) is connected to the PCO (A2) as a slave end, which is equivalent to the end STA in the first communication link, and the second broadband power line carrier communication module (BPLC module 2) is connected to the PCO (B1) as a master end, which is equivalent to the CCO of the second communication link, by using the first tunable central coordinator, the original BPLC network is converted from the frequency channel f1 to the frequency channel f2, so as to reduce the networking depth of each frequency channel and improve the bandwidth.

[0042] In a preferred embodiment, as shown in Figure 6 As shown, the BPLC communication network further includes a second tunable central coordinator, the second communication link is connected to a third communication link through the second tunable central coordinator, the third communication link has a working frequency channel of a third frequency f3, a first broadband power line carrier communication module (BPLC module 1) in the second tunable central coordinator receives BPLC signals transmitted by the second communication network, an Ethernet switch module in the second tunable central coordinator forwards the BPLC signals to a second broadband power line carrier communication module (BPLC module 2) in the second tunable central coordinator, and the second broadband power line carrier communication module (BPLC module 2) in the second tunable central coordinator transmits the BPLC signals in the third communication link.

[0043] Figure 6In the third communication link, two PCOs (PCO(C1) and PCO(C2)) and three STAs (STA(C1), STA(C2) and STA(C3)) are included. The first broadband power line carrier communication module (BPLC module 1) in the second adjustable central coordinator is connected to PCO(B2) as a slave terminal, which is equivalent to the end STA in the second communication link. The second broadband power line carrier communication module (BPLC module 2) is connected to PCO(C1) as a master terminal, which is equivalent to the CCO in the third communication link. By further using the second adjustable central coordinator, the BPLC network in the third communication link is converted into the BPLC network in the fourth communication link, so as to further reduce the networking depth of each channel and improve the bandwidth. Figure 4 The BPLC network in the third communication link is further converted into the BPLC network in the fourth communication link by using the second adjustable central coordinator, so as to further reduce the networking depth of each channel and improve the bandwidth.

[0044] The track circuit monitoring feature is that the distance between each section is 1-1.5 KM, so the low frequency band can meet the communication distance, that is, the lower three channels in the 1 / 8 frequency division of BPLC can meet the requirements of track single-channel monitoring. If a high frequency band is selected, the communication distance is short and cannot meet the requirements. However, if it is street lamp control, stage lamp control, building intercom, etc., the point-to-point distance is within 500 meters, then the high frequency band can be selected, and the anti-interference performance will be poor. If the bandwidth is high and the communication distance is within 100, the high frequency part of the band must be used.

[0045] In a preferred embodiment, as shown in Figure 7 The BPLC communication network can include a plurality of adjustable central coordinators according to the application, and each adjustable central coordinator is sequentially cascaded. Figure 7 In the third communication link, two PCOs (PCO(C1) and PCO(C2)) and three STAs (STA(C1), STA(C2) and STA(C3)) are included. The first broadband power line carrier communication module (BPLC module 1) in the second adjustable central coordinator is connected to PCO(B2) as a slave terminal, which is equivalent to the end STA in the second communication link. The second broadband power line carrier communication module (BPLC module 2) is connected to PCO(C1) as a master terminal, which is equivalent to the CCO in the third communication link. By further using the second adjustable central coordinator, the BPLC network in the third communication link is converted into the BPLC network in the fourth communication link, so as to further reduce the networking depth of each channel and improve the bandwidth.

[0046] Those skilled in the art can understand that the above preferred schemes can be freely combined and superimposed without conflict.

[0047] It should be understood that the above embodiments are only exemplary and not limiting, and those skilled in the art can make various obvious or equivalent modifications or replacements to the above details without departing from the basic principles of the application, which shall be included in the scope of the claims of the application.

Claims

1. A tunable central coordinator for a BPLC communication network, said tunable central coordinator being used for track circuit monitoring, characterized in that, The adjustable central coordinator comprises a first broadband power line carrier communication module, a second broadband power line carrier communication module, a controller module and an Ethernet switch module, The controller module is connected with the Ethernet switch module, and the Ethernet switch module is connected with the first broadband power line carrier communication module and the second broadband power line carrier communication module respectively; The controller module is configured to receive configuration information, and set a working channel of the first broadband power line carrier communication module as a first channel, set a working channel of the second broadband power line carrier communication module as a second channel, set the first broadband power line carrier communication module as a BPLC communication slave end, and set the second broadband power line carrier communication module as a BPLC communication master end according to the configuration information through the Ethernet switch module, wherein a spectrum of the first channel is different from a spectrum of the second channel. The first broadband power line carrier communication module receives a BPLC signal transmitted on the first channel, the Ethernet switch module forwards the BPLC signal to the second broadband power line carrier communication module, and the second broadband power line carrier communication module transmits the BPLC signal on the second channel.

2. The tunable central coordinator for a BPLC communication network according to claim 1, characterized in that, The first channel is a first low-frequency channel obtained by dividing a full frequency band of the BPLC by 1 / 8, and the second channel is a second low-frequency channel obtained by dividing the full frequency band of the BPLC by 1 / 8.

3. The adjustable central coordinator for a BPLC communication network according to claim 2, wherein The spectrum of the first low-frequency channel is 0.25-3.5 MHz, 3.75-7 MHz or 7.25-10.5 MHz. The spectrum of the second low-frequency channel is 0.25-3.5 MHz, 3.75-7 MHz or 7.25-10.5 MHz.

4. The tunable central coordinator for a BPLC communication network of claim 1, wherein, The controller module receives the configuration information through Ethernet, RS232 interface or GPIO interface.

5. The tunable central coordinator for a BPLC communication network of claim 1, wherein, The controller module is connected with the first broadband power line carrier communication module and the second broadband power line carrier communication module through a serial interface, The controller module is further configured to set a working channel and a working state of the first broadband power line carrier communication module and the second broadband power line carrier communication module through the serial interface, wherein the working channel comprises the first channel and the second channel, and the working state comprises the slave end and the master end.

6. The tunable central coordinator for a BPLC communication network of claim 1, wherein, The configuration information further comprises working mode information of the first broadband power line carrier communication module and the second broadband power line carrier communication module, and the working mode information comprises a relay mode and a non-relay mode.

7. A BPLC communication network for track circuit monitoring, characterized in that, The BPLC communication network comprises the adjustable central coordinator according to any one of claims 1-6, The adjustable central coordinator converts the BPLC communication network into at least two communication links, and each communication link works on a different channel.

8. The BPLC communication network for track circuit monitoring according to claim 7, characterized in that, The different frequency channels include a first low frequency channel, a second low frequency channel and a third low frequency channel obtained by dividing the BPLC full frequency band by 1 / 8, The frequency spectrum of the first low frequency channel is 0.25MHz-3.5MHz, the frequency spectrum of the second low frequency channel is 3.75MHz-7MHz, and the frequency spectrum of the third low frequency channel is 7.25MHz-10.5MHz.

9. The BPLC communication network for track circuit monitoring according to claim 7, characterized in that, The relay depth of the BPLC communication network is N, When 4<N<8, the adjustable central coordinator is arranged at N / 2; When N≧8, one adjustable central coordinator is arranged every M proxy coordinators, and the M is 2 or 3.

10. The BPLC communication network for track circuit monitoring according to claim 7, characterized in that, The BPLC communication network includes a plurality of adjustable central coordinators as claimed in any one of claims 1-9 in turn cascaded.

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