Network segmentation unit, gateway device comprising network segmentation unit, network segmentation method and network segmentation system

Abstract

The invention provides a network segmentation unit, a gateway device comprising the network segmentation unit, a network segmentation method and a network segmentation system. The gateway device comprises a gateway unit and a network segmentation unit, and the network segmentation unit is arranged between the gateway unit and an external power grid. Wherein an impedance regulator is arranged in the network segmentation unit, and the network segmentation unit is configured to be capable of supplying power to the gateway unit through a first signal in a non-specific frequency interval in a low-impedance manner; the gateway unit can pass through a second signal in a high-impedance manner so as to adjust the ratio of the power before and after the second signal passes through the network segmentation unit to be greater than a limited threshold value, so that the gateway unit can segment the local area network and other networks based on the power value of the received signal; the frequency of the first signal is lower than that of the second signal, and the second signal is used for communication of the local area network.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of smart home, and in particular to a network segmentation unit, a gateway device comprising the same, a network segmentation method and system. BACKGROUND

[0002] With the improvement of people's living standards, the smart home control system is becoming more and more important. In the prior art, wireless technology is usually used for communication between smart devices in a smart home control system, such as Wi-Fi, Zigbee, Bluetooth, etc. However, wireless communication has its own defects, such as limited communication distance and poor stability of Wi-Fi technology, poor networking capability of Bluetooth, and few network nodes, which is not suitable for multi-point control; Zigbee is a low-speed short-range wireless network protocol, which has low data transmission rate, small effective range and poor anti-interference performance. In addition, in a home environment, wireless technology is constrained by the scene and house type, and the attenuation of wireless transmission through walls and metal panels is more serious, often resulting in no signal in some areas, especially in the use of large house types, the disadvantages of wireless communication are more obvious. Therefore, power line carrier communication technology based on power lines is applied to smart home control.

[0003] However, in the power line carrier communication technology, the communication signal is transmitted on the power line and can be transmitted in any direction along the power line, and the existing gateway device for power line carrier communication has poor segmentation capability for local area networks, which can easily cause data leakage between the local area network and other networks, resulting in data security problems. SUMMARY

[0004] In order to overcome the problems in the prior art, the present application provides a network segmentation unit, a gateway device comprising the same, a network segmentation method and system.

[0005] One object of the present application is to provide a network segmentation unit, a gateway device comprising the same, a network segmentation method and system, wherein the network segmentation unit is adapted to be arranged between at least two networks for segmenting the two networks and blocking the transmission of communication signals between the at least two networks.

[0006] Another object of the present application is to provide a network segmentation unit, a gateway device comprising the same, a network segmentation method and system, wherein the network segmentation unit is adapted to be arranged at the power supply input end of a local area network for preventing the transmission of communication signals in the local area network to the outside of the local area network, avoiding the loss of signals and data leakage in the local area network, and improving the security of data.

[0007] Another object of the present application is to provide a network segmentation unit and a gateway device, a network segmentation method and a system comprising the same, wherein the network segmentation unit is adapted to be arranged at a power supply input of a local area network for preventing communication signals in at least one other network from entering the local area network, so as to avoid the communication signals in the other network occupying bandwidth in the local area network and affecting transmission speed in the local area network.

[0008] Another object of the present application is to provide a network segmentation unit and a gateway device, a network segmentation method and a system comprising the same, wherein the network segmentation unit is configured to pass the first signals with low impedance, the first signals being used to supply power to the local area network and the smart devices in the network via the power grid.

[0009] Another object of the present application is to provide a network segmentation unit and a gateway device, a network segmentation method and a system comprising the same, wherein the network segmentation unit is configured to pass the second signals in a specific frequency range with high impedance, and the transmission of the second signals between the at least two networks is blocked by attenuating the second signals.

[0010] To achieve at least one of the above objects, according to a first aspect of the present application, there is provided a gateway device having a network segmentation function, the gateway device comprising:

[0011] a gateway unit having a first conveyor for accessing or discharging a target conductor, and being capable of establishing a local area network in a state that the target conductor is accessed by the first conveyor; wherein,

[0012] The gateway device is further provided with at least one network segmentation unit capable of being electrically connected to the first conveyor via the target conductor and arranged between the gateway unit and an external power grid; wherein the network segmentation unit is provided with an impedance adjuster to form a sudden increase in impedance of the second signals in a specific frequency range passing through the network segmentation unit, and the network segmentation unit is configured to pass the first signals in a non-specific frequency range with low impedance to supply power to the gateway unit, and to pass the second signals with high impedance to adjust the ratio of power before and after the second signals passing through the network segmentation unit to be above a limited threshold, so that the gateway unit can segment the local area network and other networks based on the power value of the received signals; the frequency of the first signals is lower than the frequency of the second signals, and the second signals are used for communication of the local area network.

[0013] To achieve at least one of the above objects, according to a second aspect of the present application, there is provided a network segmentation unit adapted to be disposed at a power input end of a local network to segment the local network from other networks; wherein the network segmentation unit has an impedance adjuster to form a sudden increase of impedance of a second signal of a specific frequency interval passing through the network segmentation unit, and the network segmentation unit is configured to pass a first signal of a non-specific frequency interval at a low impedance to form a power supply path, and to pass the second signal at a high impedance to adjust a ratio of power before and after the second signal passing through the network segmentation unit to be above a defined threshold, so that the gateway unit is able to segment the local network and other networks based on a power value of the received signal; the frequency of the first signal is lower than that of the second signal, and the second signal is used for communication of the local network.

[0014] To achieve at least one of the above objects, according to a third aspect of the present application, there is provided a network segmentation method, comprising the steps of:

[0015] accessing a network segmentation unit at a power input end of a local network;

[0016] the network segmentation unit forms a sudden increase of impedance of a second signal of a specific frequency interval passing through the network segmentation unit by an impedance adjuster, and the network segmentation unit passes a first signal of a non-specific frequency interval at a low impedance to form a power supply path, and passes the second signal at a high impedance to adjust a ratio of power before and after the second signal passing through the network segmentation unit to be above a defined threshold;

[0017] the gateway unit segments the local network and other networks based on a power value of the received signal; the frequency of the first signal is lower than that of the second signal, and the second signal is used for communication of the local network.

[0018] To achieve at least one of the above objects, according to a fourth aspect of the present application, there is provided a control system, comprising: a gateway device;

[0019] the network segmentation unit according to the second aspect described above; or,

[0020] the network segmentation unit for implementing the network segmentation method according to the third aspect described above.

[0021] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. The drawings incorporated into the description and forming a part of the description, show the embodiments consistent with the present application, and together with the description, serve to explain the principles of the present application. Obviously, the drawings in the following description only show some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0023] Figure 1a is a schematic diagram of a local area network based on a traditional gateway;

[0024] Figure 1b is a schematic diagram of two adjacent local area networks based on a traditional gateway

[0025] Figure 2 is a schematic block diagram of a gateway device in some embodiments of the present application;

[0026] Figure 3a is a schematic diagram of a local area network based on a gateway device in some embodiments of the present application;

[0027] Figure 3b , Figure 3c is a schematic diagram of two adjacent local area networks based on a gateway device in some embodiments of the present application;

[0028] Figure 4 is a schematic block diagram of a network segmentation unit in some embodiments of the present application;

[0029] Figure 10 is a measured diagram of signal attenuation by a network segmentation unit in some embodiments of the present application;

[0030] Figures 11-12 is a schematic block diagram of a gateway unit in some embodiments of the present application;

[0031] Figure 13 is a circuit schematic diagram of a gateway chip in some embodiments of the present application;

[0032] Figures 14-16 is a circuit schematic diagram of a power carrier communication chip in some embodiments of the present application;

[0033] Figure 17 is a circuit schematic diagram of a watchdog in a gateway unit in some embodiments of the present application;

[0034] Figure 18 is a schematic block diagram of a network segmentation unit in some embodiments of the present application;

[0035] Figure 19aFig. 1 is a schematic block diagram of a local area network constructed based on a network segmentation unit in some embodiments of the present application;

[0036] Figure 19b Figure 19c Fig. 2 is a schematic block diagram of two adjacent local area networks constructed based on a network segmentation unit in some embodiments of the present application;

[0037] Figure 20 Fig. 3 is a flowchart of a network segmentation method in some embodiments of the present application;

[0038] Figure 21a Figure 21b Fig. 4 is a schematic diagram of a control system in some embodiments of the present application;

[0039] Figure 22a Figure 22b 22c Fig. 5 is a schematic diagram of a control system in some other embodiments of the present application;

[0040] Figure 23 Fig. 6 is a schematic diagram of a control system in some other embodiments of the present application. DETAILED DESCRIPTION

[0041] The embodiments of the present application will be described in detail below with reference to the drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. It is apparent that the described embodiments are merely a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0042] ​​​​It should be understood that, in the description of all embodiments of the present application, the terms "upper", "lower", "left", "right", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features referred to. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. The terms "coupled", "connected" and the like should be broadly understood, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection or can communicate with each other; can be directly connected, or indirectly connected through an intermediate medium to form a linkage relationship, can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] Referring to Figure 1a , a schematic diagram of an existing local network based on power line carrier communication technology established by a traditional gateway is given; Figure 1a The local network 1 established by the traditional gateway 1001 is exemplarily given in the figure. The external power grid supplies power to the traditional gateway 1001 and the sub-devices (2011, 2012, …, 201N) through the power line, and all the sub-devices connected with the traditional gateway 1001 are accessed into the local network 1 constructed by the traditional gateway 1001; the traditional gateway 1001 converts the signal into a power line carrier signal and loads it on the power line, and sends it to each sub-device (2011, 2012, …, 201N) in the local network through the power line; at the same time, the power line carrier data generated by each sub-device is also transmitted to the traditional gateway 1001 through the power line. The power line is both a power supply line and a signal line in the entire local network system. Since the electric signal in the power line can be transmitted bidirectionally, the power line carrier signal loaded on the electric signal can be transmitted in any direction in the power grid along with the electric signal. Taking Figure 1aThe power carrier signal transmitted by the traditional gateway 1001 in the exemplary local area network 1 can be transmitted along the power line to each sub-device (2011, 2012, …, 201N) in the local area network, and can also be transmitted along the power line to the external power grid. Similarly, the power carrier data transmitted by each sub-device (2011, 2012, …, 201N) in the local area network 1 can be transmitted to the traditional gateway 1001 in the local area network, and can also be transmitted along the power line to the external power grid. Therefore, the local area network established based on the power carrier technology is not clearly separated from other networks (such as the external power grid), which can cause signal loss and data leakage. In one specific example, Figure 1a The network configuration request transmitted by each sub-device (2011, 2012, …, 201N) in the local area network 1 to the traditional gateway 1001 in the network can be transmitted along the power line to the external power grid, which can cause other users in the external power grid to also receive the network configuration request, and can cause the other users to also control the devices in the local area network 1. In another example, the data collected by each sub-device (2021, 2022, …, 202N) in the local area network 1 is fed back to the traditional gateway 1001, but the data can be transmitted along the power line to the external power grid, which can cause any other user in the external power grid to also receive the user data in the local area network 1, and can cause information leakage. It can be seen that the local area network of the existing smart home control system established based on the power carrier technology is not clearly separated from the external power grid, which can cause the data in the local area network to be obtained by other users in the external power grid, and can cause data security risks.

[0044] In addition, referring to Figure 1b , the structure block diagram of the adjacent local area networks established based on the traditional gateway and the power carrier communication technology is given; Figure 1b In the example, the local area network 1 and the local area network 2 established by the two adjacent traditional gateways 1001 and 1002 are given, and the number of local area networks can be two or more. For example, Figure 1b In the exemplary adjacent network, the power carrier signal for communication between the traditional gateway 1001 and the sub-devices connected thereto in the local area network 1 can be transmitted along the power line within the local area network 1, and can also be transmitted along the power line to the power grid direction, superimposed on the power supply signal and transmitted to the local area network 2 along the power line. Similarly, the power carrier signal for communication within the local area network 2 can also be transmitted along the power line to the power grid direction, superimposed on the power supply signal and transmitted to the local area network 1 along the power line. It can be seen that when there are multiple wired local area networks established based on the power carrier technology in the entire power system, the network division between the local area networks is not clear, which can cause data leakage due to data mutual interference between the networks. In one specific example, Figure 1bThe sub-devices (2011, 2012, …, 201N) in the local area network 1 send a network configuration request to the traditional gateway 1001 of the network, however, the traditional gateway 1002 can also receive the request, at this time, once the network configuration is successful, the devices inside the local area network 1 home will be controlled by the user of the local area network 2. In another example, the sub-devices (2021, 2022, …, 202N) in the local area network 2 feed back the data collected by themselves to the traditional gateway 1002, however, the traditional gateway 1001 can also receive the feedback data, at this time, the data of the local area network 2 will inevitably be seen by the user of the local area network 1. It can be seen that in the local area network of the existing smart home control system based on the power carrier technology, the unclear network segmentation between adjacent local area networks will cause serious information leakage and data security risks.

[0045] Based on this, the present application provides a gateway device with a network segmentation function, which realizes the segmentation between the local area network established by the gateway device and other networks through a network segmentation unit, so as to solve the at least one technical problem.

[0046] In addition, the present application also provides a network segmentation unit, a network segmentation method and a control system based on the gateway device, which are discussed below with reference to the accompanying drawings. However, those skilled in the art will easily understand that the detailed description given herein with reference to these drawings is only for illustrative purposes and should not be understood as limiting.

[0047] Please refer to Figures 2-17 , based on Figures 2-17 , a gateway device with a network segmentation function is specifically illustrated; as shown in Figure 2 , the gateway device 10 comprises:

[0048] a gateway unit 100, which has a first conveyor 101 for accessing or discharging a target conductor 300, and can establish a local area network in the state that the target conductor 300 is accessed by the first conveyor 101; when the gateway unit is powered on, the local area network can be established, and all sub-devices connected with the gateway device are accessed to the local area network;

[0049] The gateway device is also provided with at least one network segmentation unit 200, which can be connected to the first conveyor 101 through the target conductor 300 to be arranged between the gateway unit 100 and the external power grid; the network segmentation unit 200 is added before the gateway unit 100, the external power grid passes through the network segmentation unit 200, and the gateway unit 100 is provided with power through the first conveyor 101 based on the target conductor 300; wherein the signal for powering the local area network is called the first signal, which can be a 220V / 50Hz alternating current signal or other power supply signals;

[0050] The network partition unit 200 is provided with an impedance adjuster 201 to form a sudden increase of impedance of the second signal in a specific frequency range passing through the network partition unit, and the network partition unit 200 is configured to pass the first signal in a non-specific frequency range at a low impedance to supply power to the gateway unit 100 and pass the second signal at a high impedance to adjust the ratio of the power of the second signal before and after passing through the network partition unit 200 to be above a limited threshold, so that the gateway unit 100 can partition the local area network and other networks based on the power value of the received signal; the frequency of the first signal is lower than that of the second signal, and the second signal is used for communication of the local area network.

[0051] In other words, the impedance adjuster 201 in the network partition unit 200 forms a high impedance isolation protection effect on the second signal in a specific frequency range, so that when the second signal passes through the network partition unit 200, most of the second signal is hindered and cannot pass due to the presence of the impedance adjuster 201, and the first signal different from the second signal can pass smoothly at a low impedance and be used to supply power to the gateway unit 100. Therefore, the impedance sudden increase should be understood as that when the second signal enters the network partition unit 200, the impedance adjuster 201 instantaneously shows high impedance to the second signal, producing a strong blocking effect and a strong degree of attenuation to the second signal. When the first signal for power supply enters the network partition unit 200 from the power grid, the impedance adjuster 201 shows low impedance to it, does not block it, and the power supply signal can pass almost without loss and supply power to the gateway unit 100 based on the target conductor 300.

[0052] The second signal should be understood as a kind of signal used for communication, which can be a message generated in a specific format based on a certain protocol (such as IEEE1901.1), and different purposes based on different contents of related fields in the message to form second signals with different functions. It is worth noting that the second signal is a signal in a specific frequency range with information, and the communication in the entire local area network is based on the second signal, and the frequency is significantly higher than that of the first signal. The second signal can be loaded on the target conductor and transmitted together with the first signal in the entire local area network; in a specific example, the specific frequency range of the second signal can be any segment within 0.7MHz-12MHz, such as 2.4MHz-5.6MHz, 1.95MHz-12MHz, 0.78MHz-2.93MHz, or 1.76MHz-2.93MHz, etc. Those skilled in the art can set the corresponding specific frequency range based on actual use requirements, and the frequency range of the second signal is not limited too much in this embodiment.

[0053] In the embodiment, due to the existence of the network segmentation unit, if the second signal enters the network segmentation unit, the impedance of the network segmentation unit to the second signal suddenly increases, a strong blocking effect is generated, a strong degree of attenuation is generated to the second signal, so that only a small part of the second signal can pass through, and the signal strength of the second signal output after passing through the network segmentation unit is very weak, that is, the ratio of the power of the second signal before and after passing through the network segmentation unit is adjusted to be above the limited threshold, so that the second signal between the two adjacent networks cannot pass through the network segmentation unit to the other network without loss, and then, the gateway unit judges whether the received second signal belongs to the second signal in the local area network based on the signal strength of the received second signal, so as to segment the local area network and other networks. In the embodiment, the other network can be an external power grid or other local area networks and the like. In addition, in the embodiment, in combination with the distance between the sub-device and the gateway device in a general family and the normal loss of the power line to the second signal, the limited threshold is set to 10 6 ~ 10 12 , and then, based on the limited threshold, the second signal of the other network will be attenuated to a degree that is easy to be distinguished by the gateway unit after passing through the network segmentation unit of the local area network, so that the gateway unit can filter out the second signal which does not belong to the local area network with low intensity, and also will not filter out the second signal sent by the sub-device which is far away from the gateway device in the local area network. In a specific example, the limited threshold is preferably set to 10 8 . Based on the preferred limited threshold, the gateway device can achieve a better balance between the segmentation performance between the local area network and the other network and the consideration between the sub-devices with weak signal strength in the local area network.

[0054] In addition, it is worth noting that in the present application, the second signal entering the network segmentation unit includes not only entering from the external power grid direction, passing through the network segmentation unit and outputting to the gateway unit direction, but also entering from the gateway unit direction, passing through the network segmentation unit and outputting to the external power grid direction. When the second signal enters the network segmentation unit from the external power grid direction and outputs to the gateway unit direction, the ratio of the power of the second signal when the external power grid enters the network segmentation unit to the power of the second signal when outputting from the network segmentation unit to the gateway unit needs to be above the limited threshold; when the second signal enters the network segmentation unit from the gateway unit direction and outputs to the external power grid direction, the ratio of the power of the second signal when the gateway unit enters the network segmentation unit to the power of the second signal when outputting from the network segmentation unit to the external power grid needs to be above the limited threshold.

[0055] Reference Figure 3aFor the local area network diagram constructed based on the gateway device in the embodiment, it can be seen that the external power grid supplies power to the gateway device 10 and each sub-device (2011, 2012, …, 201N) connected thereto, respectively. If the power supply signal of the external power grid carries other communication signals (such as a second signal), the power supply signal and the other communication signals enter the local area network 1 together. The impedance regulator 201 in the network segmentation unit 200 presents low impedance to the power supply signal, so that the power supply signal passes through smoothly, and the power supply to the gateway unit 100 and the sub-devices (2011, 2012, …, 201N) connected thereto is completed. However, the impedance regulator 201 presents a sudden increase in impedance to the second signal superimposed on the power supply signal, so that the second signal is greatly attenuated. After passing through the network segmentation unit 200, the intensity of the second signal is very weak, so that it cannot be detected / recognized by the gateway unit 100, or it is judged by the gateway that it does not belong to the local area network, and communication / control is not performed based on the second signal. In this way, the effect of segmentation of the local area network 1 and the external power grid is achieved. When the second signal for communication between the gateway unit 100 and the sub-devices (2011, 2012, …, 201N) connected thereto in the local area network 1 enters the network segmentation unit 200 along the power line as the target conductor 300 from the gateway unit 100, the impedance regulator 201 in the network segmentation unit 200 presents a sudden increase in impedance to the second signal superimposed on the target conductor, so that the second signal is almost completely blocked on the side of the gateway unit 100, and almost cannot pass through the network segmentation unit to reach the external power grid, thereby avoiding the flow of the second signal in the local area network to the external network. The network segmentation unit improves the network segmentation capability of the gateway device, shields the communication signals in the external power grid outside the local area network, and blocks the signals in the local area network inside the local area network. In this way, the effect of segmentation of the local area network 1 and the external power grid is achieved, and the data security in the local area network is protected.

[0056] Reference Figure 3bFor another embodiment, the local area network diagram based on the gateway device is shown in the figure, two adjacent local area networks are exemplarily shown, wherein the local area network 1 is constructed by using the gateway device 10, and the local area network 2 is constructed by using the traditional gateway 1002. Of course, the number of local area networks can be two or more, and the specific number of local area networks should not be understood as a limitation on the protection scope of the present application. If the second signal for communication between the traditional gateway 1002 and the sub-devices (2021, 2022, …, 202N) connected thereto in the local area network 2 enters the external power grid along the power line, and is superimposed on the power supply signal to enter the local area network 1, the impedance adjuster in the network segmentation unit 200 in the gateway device 10 presents low impedance to the power supply signal, so that the power supply signal passes through smoothly, and the power supply to the gateway unit 100 and the sub-devices (2011, 2012, …, 201N) connected thereto is completed. The impedance adjuster presents a sudden increase in impedance to the second signal of the local area network 2 superimposed on the power supply signal, so that the second signal is greatly attenuated, and the intensity of the second signal after passing through the network segmentation unit 200 is very weak, so that it cannot be recognized / detected by the gateway unit 100, or it is judged by the gateway that it does not belong to the local area network, and communication / control is not based on the second signal. In this way, the effect of segmentation of the two local area networks of the local area network 1 and the local area network 2 is achieved, and the mutual interference of signals between adjacent networks is avoided. When the second signal for communication between the gateway unit 100 and the sub-devices (2011, 2012, …, 201N) connected thereto enters the network segmentation unit 200 along the power line from the gateway unit 100, the impedance adjuster in the network segmentation unit 200 presents a sudden increase in impedance to the second signal, so that the second signal is almost completely blocked on the side of the gateway unit 100, and almost cannot be output from the network segmentation unit to the external power grid, thereby preventing the second signal inside the local area network 1 from flowing to the external network. The network segmentation unit improves the network segmentation capability of the gateway device, shields the communication signals of adjacent local area networks outside the local area network, and blocks the signals inside the local area network on one side of the local area network, so as to achieve the effect of segmentation of adjacent local area networks.

[0057] Reference Figure 3cFig. 6 is a schematic diagram of two adjacent local area networks constructed based on the gateway device according to another embodiment, wherein both the local area network 1 and the local area network 2 are constructed by using the gateway device, and the transmission of the second signal between the two networks needs to pass through two-stage network partition units for attenuation. Specifically, the second signal for communication between the gateway unit 100-2 and the sub-devices (2021, 2022, …, 202N) connected thereto in the local area network 2, when transmitted from the gateway 100-2 to the external power grid, enters the network partition unit 200-2 along the power line as the target conductor 300, and the impedance regulator in the network partition unit 200-2 presents a sudden increase in impedance to the second signal superimposed on the target conductor, so that the second signal is almost completely blocked on the side of the gateway unit 100-2 and cannot be output to the external power grid. The signal strength of the second signal transmitted to the external power grid has been attenuated to be very weak, which is superimposed on the power supply signal and enters the local area network 1 along the power line. The impedance regulator in the network partition unit 200-1 presents low impedance to the power supply signal, so that the power supply signal passes through for power supply. The second signal of the local area network 2 superimposed on the power supply signal and attenuated by the network partition unit 200-2 presents a sudden increase in impedance, so that the signal strength is attenuated again after passing through the network partition unit 200-1, so as to be too weak to be recognized / detected by the gateway unit 100-1 or to be judged by the gateway as not belonging to the local area network. Similarly, the second signal for communication between the gateway unit 100-1 and the sub-devices (2011, 2012, …, 201N) connected thereto in the local area network 1 is blocked in the local area network 1 due to the high impedance of the network partition unit 200-1. Even if a small part of the second signal passes through the network partition unit 200-1 to enter the external power grid, it is greatly attenuated and has very weak signal strength. When entering the local area network 2, the second signal is further attenuated by the network partition unit 200-2. In summary, the multi-stage network partition unit can better divide the two adjacent local area networks and better protect the privacy of users and avoid data leakage.

[0058] So far, the gateway device with the network segmentation function provided based on the technical scheme can segment the established local area network from other external networks while establishing the local area network, so that the established internal network is more stable and secure, and the data inside the local area network is protected. At the same time, external signals are prevented from occupying the communication bandwidth in the local area network, and the data transmission speed is ensured. In addition, the inventor found that when the gateway unit and the network segmentation unit are integrally arranged in the same shell and used as a whole device, the overall volume of the gateway device after the combination of the two will inevitably increase, and then in the application scenario where the installation space is limited, the gateway device with large volume is not convenient to install. Moreover, since the network segmentation unit is powered by strong electricity, the gateway unit has many weak electric components, and the close installation distance between the two will cause the network segmentation unit to affect the work of the gateway unit. Therefore, considering this technical problem, in some embodiments of the present application, the gateway unit and the network segmentation unit are arranged separately and connected through the power line as the target conductor. Then in this embodiment, the gateway unit and the network segmentation unit can be split into two independent units and used separately, and the two are connected through the power line to realize signal communication between the two units through the power line as the power line and the signal line. In this way, the installation can be more flexible, the applicability of the application scenario is enhanced, and at the same time, the network segmentation unit can also be avoided to heat up and cause the instability of the gateway unit. In addition, according to the power consumption of the local area network device, a network segmentation unit with matched power consumption can be designed, for example, if the power consumption of the local area network is 1500W, the network segmentation unit can be designed to match the power consumption of 2200W, which further improves the stability and durability of the device.

[0059] As Figure 4As shown, in some embodiments, the network partition unit 200 further comprises at least two capacitors 202, 203 connected in series between the zero line and the live line of the impedance regulator 201 on the side away from the gateway unit 100, and the capacitance parameters of the capacitors are configured such that the capacitors can cooperate with each other to make the overall self-resonant frequency in the specific frequency range. In this embodiment, the low impedance characteristic of the capacitors at high frequency signals is used to further improve the partitioning capability of the network partition unit. When the telecommunication signal entering the network partition unit contains a second signal, the impedance regulator exhibits a sudden increase in impedance to the second signal, and at the same time, the low impedance characteristic of the capacitors to high frequency signals quickly shorts the second signal, preventing the second signal from entering the network partition unit, and further improving the isolation capability of the network partition unit. In addition, in actual use, the capacitive reactance frequency curve of the capacitor will present a "V" shape, and at its self-resonant frequency, the capacitive reactance of the capacitor reaches the minimum. Therefore, in order to further reduce the impedance of the capacitor to the second signal, the self-resonant frequency of the capacitor combination is located in the specific frequency range of the second signal, so that for any frequency of the second signal in the specific frequency range, the capacitor combination can maintain a small impedance.

[0060] As Figure 5As shown, in some embodiments, the network partition unit 200 is connected with a first inductor 211 in series to form the impedance adjuster on the live wire or the neutral wire corresponding to the target wire 300. In this way, when the gateway unit 100 accesses the first signal through the network partition unit 200, based on the frequency selection characteristics of the first inductor 211, the impedance of the network partition unit 200 to the second signal in a specific frequency range will suddenly increase. The inductor is equivalent to a wire for low-frequency signals and does not have a blocking effect, but presents a large impedance for high-frequency signals. When the power supply signal based on the first signal enters the network partition unit 200 along the neutral wire as the target wire, the first signal can pass through the network partition unit 200 almost without loss and then supply power to the gateway unit 100. For the second signal with a higher frequency superimposed on the first signal, when it faces the high impedance of the first inductor 211 and the low impedance characteristics of the capacitor 202 and the capacitor 203, most of the second signal entering the network partition unit 200 will be quickly short-circuited by the capacitor 202 and the capacitor 203, and a small part of the second signal that continues to enter the network partition unit 200 will be attenuated again by the first inductor 211 with a sudden increase in impedance, so that the second signal strength output from the network partition unit 200 is very small, so as to be unable to be recognized / detected by the gateway unit 100, or to be judged by the gateway 100 as not belonging to the local area network, and not to be communicated / controlled based on the second signal. The second signal from the gateway unit 100 side entering the network partition unit 200 faces the high impedance of the first inductor 211, and most of the second signal is blocked on the side of the gateway unit 100, and a small part of the second signal passing through the first inductor 211 is quickly short-circuited by the low-impedance capacitor 202 and the capacitor 203, thereby avoiding the flow of the second signal in the local area network to the external network. Finally, the effect of partitioning the local area network and the external power grid is achieved.

[0061] As Figure 6As shown, in some embodiments, the network segmentation unit 200 connects a first inductor 211 in series on the live wire corresponding to the target conductor 300 and a second inductor 221 in series on the neutral wire to form the impedance regulator. Thus, when the gateway unit 100 receives a first signal via the network segmentation unit 200, based on the frequency selectivity of the first inductor 211 and the second inductor 221, a second signal in a specific frequency range experiences a sudden increase in impedance through the network segmentation unit 200. In this embodiment, an inductor 211 and an inductor 221 are connected in series on the live wire and the neutral wire respectively to further increase the attenuation of the second signal by the impedance regulator and further improve the blocking performance of the network segmentation unit. It should be noted that in this embodiment, an inductor is connected in series on both the neutral and live wires, rather than simply increasing the inductance value to improve the impedance. This is because the load current limits the inductance of a single inductor, so connecting two inductors in series further increases the overall impedance of the inductor. Furthermore, the influence of the inductor's self-resonant frequency is considered. Generally, the larger the inductance value, the larger the parasitic parameters, and the smaller the corresponding self-resonant frequency. Therefore, to avoid directly increasing the inductance value and causing a shift in the overall impedance resonance point, connecting an inductor in series on both the neutral and live wires increases the impedance of the impedance regulator to the second signal.

[0062] Furthermore, such as Figure 7 and Figure 8As shown, the network partition unit 200 is also connected between the zero line and the live line on the side of the first inductor 211 away from the gateway unit, and three capacitors 202, 203, 204 with different capacitances are connected in parallel, and the capacitances of the three capacitors are configured to be able to short the second signal. In this embodiment, when the power supply signal based on the first signal enters the network partition unit 200 along the zero line and the live line as the target conductors, the first signal can pass through the network partition unit 200 almost without loss and then supply power to the gateway unit 100, while for the second signal with a higher frequency superimposed on the first signal, the low impedance characteristic of the capacitors will rapidly short the vast majority of the second signal entering the network partition unit 200, and the small part of the second signal that continues to enter the network partition unit 200 will face the inductor 211 or the inductor 211 and the inductor 221 with a sudden increase in impedance, and again be attenuated, so that the second signal strength output from the network isolation unit 200 is very small, so as to be unable to be recognized / detected by the gateway unit 100, or be judged by the gateway 100 as not belonging to the local area network, and not to communicate / control based on the second signal; and the second signal entering the network partition unit 200 from the side of the gateway unit 100 will face the inductor 211 or the inductor 211 and the inductor 221 with a sudden increase in high impedance, and the vast majority of the second signal will be blocked on the side of the gateway unit 100, and the small part of the second signal passing through the inductor 211 or the inductor 211 and the inductor 221 will be rapidly shorted by the low-impedance capacitors 202, 203, 204, thereby avoiding the flow of the second signal inside the local area network to the external network. Finally, the effect of partitioning the local area network from the external network is achieved.

[0063] In addition, capacitors with different capacitances have a large difference in their self-resonant frequencies, and generally the larger the capacitance, the smaller the self-resonant frequency. Therefore, in this embodiment, in order to ensure that the impedance of the capacitor as a whole can remain relatively small in a range as large as possible near the specific frequency range of the second signal, the three capacitors should have different capacitances. In this embodiment, the relationship between the capacitances (C1, C2, C3) of the three capacitors is set as C1>C2>C3, and the corresponding relationship between the self-resonant frequencies (f1, f2, f3) is f1>f2>f3; when the signal frequency is less than f1, the impedance decreases as the frequency increases, when the signal frequency is greater than f3, the impedance increases as the frequency increases, and when the signal frequency is between f1 and f3, the combined impedance of the capacitor combination can be maintained at a relatively low level due to the self-resonant frequency f2. Therefore, in this embodiment, the combination of capacitors with different capacitances in parallel can provide the possibility of maintaining a small impedance in a range as large as possible near the specific frequency range, thereby providing more excellent low-impedance performance for the second signal that continuously changes within the specific frequency range.

[0064] As Figure 9a、 Figure 9b As shown in FIG. 8, in some embodiments, the network partition unit 200 sequentially connects a first inductor 211 and a second inductor 221 in the direction away from the gateway unit 100 along the live wire or the neutral wire corresponding to the target wire 300 to form the impedance adjuster. In this way, when the gateway unit 100 accesses the first signal through the network partition unit 200, based on the frequency selection characteristics of the first inductor 211 and the second inductor 221, the impedance of the second signal in a specific frequency range suddenly increases when passing through the network partition unit 200.

[0065] The network partition unit 200 further connects at least one capacitor 202 between the live wire and the neutral wire between the first inductor 211 and the second inductor 221, and at least another capacitor between the live wire and the neutral wire on the side of the second inductor 221 away from the first inductor 211 to form a short-circuit effect on the second signal.

[0066] In this embodiment, the capacitors and inductors are arranged in a spaced manner to form multi-stage blocking and attenuation of the second signal. Taking the direction from the external power grid to the gateway unit as an example, when the second signal enters the network partition unit 200 along the power line as the target wire, most of the second signal is short-circuited by the capacitor 203, or the capacitor 203 and the capacitor 204, which present low impedance, and cannot continue to pass through the network partition unit 200. The few second signals that continue to enter the network partition unit 200 are attenuated by the inductor 221, and their signal strength is significantly reduced. At this time, most of them are again short-circuited by the capacitor 202, which presents low impedance. The remaining part of the second signal is again attenuated by the inductor 211. After multiple attenuations, the signal strength of the second signal output through the network partition unit 200 is attenuated to be very small, so that it cannot be recognized / detected by the gateway unit 100, or the gateway 100 judges that it does not belong to the local area network, and does not communicate / control based on the second signal, thereby achieving the purpose of network partition.

[0067] After actual testing, Figure 7 、 Figure 8 , the blocking effects of the three circuit structures on the second signal are shown in Table 1. In the table, dB represents the ratio of the power of the second signal after passing through the network partition unit to the previous power. From the experimental data, it can be seen that in the example specific frequency range of 2.4M-5.6MHz, the three circuit structures can all greatly attenuate the second signal and produce a strong blocking effect between the local area network and other networks.

[0068] Table 1:

[0069]

[0070] In all the above embodiments, the inductance of the first inductor is configured such that the self-resonant frequency is in the specific frequency range. Since the inductance is also not an ideal device in practice, it has the highest impedance at the self-resonant frequency. In order to further improve the high impedance effect of the network segmentation unit on the second signal, the self-resonant frequency of the first inductor is in the specific frequency range, so as to ensure that the network segmentation unit has higher impedance characteristics for the second signal with the specific frequency range to intercept the signal.

[0071] In all the above embodiments, the capacitance of each capacitor is set to 47nF-470nF; the inductance of the first inductor is [1uH-1mH], and the specific frequency range is set to 1MHz-12MHz, so that the power of the second signal after passing through the network segmentation unit is at least reduced to below -65db. Generally, the capacitance of the capacitor is inversely proportional to its self-resonant frequency, so the capacitance of the capacitor should not be too large or too small. Referring to Table III, through actual measurement, the resonant frequency of the 47nF capacitor is about 5.2MHz, and the resonant frequency of the 470nF capacitor is about 1.6MHz. Considering that the self-resonant frequency of the capacitor combination should be within the specific frequency range, in this embodiment, the capacitance of the capacitor is set to 47nF-470nF.

[0072] For the inductor value, since the network segmentation unit is located at the front end of the entire local area network, the power supply signal of the entire local area network flows through the inductor, so the current passing through is relatively large, which can generally reach more than 10A. Under the condition of a certain inductance, the thicker the winding coil of the inductor, the larger the volume of the inductor produced. For the gateway device, the overall volume is limited, and the volume of the inductor in the network segmentation unit is also correspondingly limited. For inductors of the same size, the larger the inductance, the smaller the rated current, the larger the direct current resistance DCR, the larger the heat generated by the same current, and the higher the cost. Therefore, the volume, cost and heat problem will in turn restrict the inductance value. In addition, the smaller the inductance, the smaller the impedance at the same frequency. Therefore, the inductance of the inductor in the network segmentation unit should not be too large or too small. In order to ensure that the impedance of the inductor can meet the requirements in the specific frequency range, after testing, the inductance value of the inductor is set to 1uH-1mH for the second signal with the specific frequency range of 1MHz-12MHz, so that the power of the second signal after passing through the network segmentation unit is at least reduced to below -65db.

[0073] Different network partition units are added between the gateway and the sub-devices, and the communication signals between the gateway and the sub-devices are tested, as shown in Table 2. As shown in Table 3, in the absence of the network partition unit, the average power of the second signal is -1db, and after the network partition unit is added between the two, the average value of the second signal power is -65db at most. It can be seen that the two local area networks have been well partitioned.

[0074] Table 2

[0075]

[0076] In a specific example, the capacitance values of the three capacitors are 47nF, 100nF and 470nF respectively, and / or the inductance value of the first inductor is set to 33uH, so that the network partition unit has at least one frequency point in the specific frequency range 2.4MHz-5.6MHz, which can make the attenuation of the second signal reach the maximum value.

[0077] In this embodiment, the specific frequency range of the second signal is preferably 2.4MHz-5.6MHz.

[0078] Table 3 shows the parameter table of the attenuation degree of the signal of the capacitors with different capacitance values tested by the network analyzer. It can be seen that the capacitor with a capacitance value of 470nF has the maximum attenuation to the signal at 2.4MHz; the capacitor with a capacitance value of 47nF has the maximum attenuation to the signal at 5.6MHz. In order to further maintain the maximum attenuation in the frequency range of 2.4-5.6MHz, the capacitor with a capacitance value of 100nF is selected to balance the characteristic frequency points, which has good performance at both 2.4MHz and 5.6MHz. Therefore, the capacitance values of the three capacitors are preferably 47nF, 100nF and 470nF. In a specific example, the capacitance values of the capacitor 202, the capacitor 203 and the capacitor 204 are 47nF, 100nF and 470nF respectively.

[0079] Table 3

[0080]

[0081] In combination with the volume of the gateway device, the volume, DC impedance, load capacity, heat generation and cost of the inductor, a 33uH vertical 20A inductor is selected in this embodiment. In a specific example, the first inductor 211 selects a 33uH vertical 20A inductor. In another specific example, the first inductor 211 and the second inductor 221 select a 33uH vertical 20A inductor; in another specific example, the first inductor 211 and the second inductor 221 select a 33uH / 30A inductor.

[0082] As Figure 10As shown, the capacitance of the capacitor 202, the capacitor 203 and the capacitor 204 is 47nF, 100nF and 470nF respectively, the first inductor 211 and the second inductor 221 are selected as 33uH vertical type 20A, and the attenuation actual measurement diagram of the second signal is shown. At a frequency of about 2.74MHz, the signal has the maximum attenuation, which can reach -106.21db; and in the frequency range of 2.4-5.6MHz, the second signal can maintain a relatively large attenuation.

[0083] In all the above embodiments, at least one common mode inductor is arranged in the network segmentation unit for filtering common mode interference signals. The common mode inductor can be arranged at any position of the network segmentation unit for filtering common mode noise introduced by the power grid or generated in the user local area network. In one specific example, a 2mH / 15A common mode inductor is arranged between the inductor 204 and the inductor 203. In another specific example, a 5mH / 20A common mode inductor is arranged between the inductor 204 and the inductor 203. In still another specific example, a 1mH common mode inductor is arranged between the inductor 204 and the inductor 203, and between the inductor 203 and the inductor 202.

[0084] In all the above embodiments, the shell of the network segmentation unit is filled with a fixing medium. The network segmentation unit includes a shell. In order to avoid the vibration of the device caused by the interference signal flowing through the network segmentation unit at 20kHz-20kHz, the network segmentation unit is filled with a solid medium in the accommodation cavity of the network segmentation unit for reducing the vibration of the components.

[0085] In some embodiments, the gateway unit is configured to receive downlink network data through the second conveyor connected network, demodulate the network data to obtain a second signal in a specific frequency range, and load the second signal to a target wire for sending to a corresponding device in the local area network where the gateway unit is located; and receive a second signal in the local area network through the first conveyor and demodulate the second signal to obtain uplink network data, and upload the uplink network data to the network through the second conveyor.

[0086] The gateway unit communicates with the Ethernet through the second conveyor, and the user can also communicate with the gateway unit based on the Ethernet through a terminal. Specifically, the gateway unit can receive network data issued by the Ethernet, such as a control instruction sent by the user to the gateway unit through the terminal. The gateway unit receives the control instruction through the second conveyor, converts the control instruction into a second signal in a specific frequency range with control information, loads the second signal onto a target wire, and sends the second signal to any device in the local area network through the power line.

[0087] Meanwhile, the gateway unit can also convert the second signal extracted from the target conductor into network data and upload the network data to the network or further feedback to the user's terminal; thus, the gateway unit realizes the communication between the local area network and the Ethernet.

[0088] As shown in the figure, in some embodiments, the gateway unit 100 includes a signal processor 102 and a signal converter 103; Figure 11 The signal processor 102 is electrically connected to the second conveyor 104, so as to receive the downlink network data through the second conveyor 104 in the state that the second conveyor 104 is connected to a router 20 through a network data line and accesses the network; the gateway unit 100 accesses the Ethernet through the connection with the router 20, the user terminal 30 sends an instruction to the router 20, and the gateway unit 100 receives the instruction from the router 20, thereby realizing the communication between the local area network and the Ethernet.

[0089] The signal converter 103 is electrically connected to the signal processor 102, so as to demodulate the downlink network data to obtain the second signal in a specific frequency interval; wherein the gateway unit 100 is communicatively connected to the first conveyor 101 through a transformer 105 and a coupling capacitor 106, so as to form a coupling circuit with high-pass characteristics in the state that the first conveyor 101 accesses the target conductor 300, the primary side of the coupling capacitor 106 and the transformer 105 are electrically connected, so as to form selectivity of the coupling circuit based on the coupling circuit, so that the signal converter 103 can inject the downlink network data corresponding to the second signal into the target conductor 300 in isolation on the secondary side of the transformer 105 based on the selectivity of the coupling circuit.

[0090] In this embodiment, the target conductor 300 accesses the gateway unit 100 through the first conveyor 101, and introduces a telecommunication signal to the gateway unit 100, which on the one hand supplies power to the signal converter 103 and the signal processor 102 with the first signal, to ensure the normal work of the gateway unit 100; on the other hand, the coupling capacitor 106 and the transformer 105 are arranged between the first conveyor 101 and the signal converter 103, which are used to extract the second signal with a specific frequency interval from the target conductor 300, or load the second signal with a specific frequency interval generated by the signal converter 103 and carrying control information into the target conductor 300; meanwhile, the transformer 105 also plays a role in isolating strong and weak electricity, avoiding the strong current in the external power grid from entering the signal converter 103 and the signal processor 102 in the gateway unit 100, causing the chip to burn out, and also ensuring the safety of the user.

[0091]

[0092] ​In addition, the gateway unit 100 receives network data from the router 20 through the second conveyor 104, and generates corresponding control instructions through the processing of the signal processor 102. The control instructions are converted into second signals with control information and a specific frequency range through the data converter 103, and the second signals are coupled to the target conductor 300 through the transformer 105 and the capacitor 106, and are sent to any sub-device inside the local area network as the target conductor power line; or, the second signals sent by the sub-device in the local area network enter the gateway unit 100 through the loading of the target conductor 300. The capacitor 106 with high-pass characteristics and the transformer 105 can select the second signals with a specific frequency range to enter the signal converter 103, and block other electrical signals except the second signals to ensure the purity of the extracted second signals. The signal converter 103 converts the received second signals into control signals that can be recognized by the signal processor 102 through demodulation, and then the signal processor 102 can perform self-operation processing, or send the data to the router 20 through the second conveyor 104 to realize data uploading.

[0093] As shown in Figure 12 some embodiments, the signal processor 102 includes a gateway chip 1021, and the signal converter 103 includes a power carrier communication chip 1031.

[0094] Figure 12 A block diagram of the gateway unit 100 in some embodiments is shown. The gateway unit 100 obtains electrical signals from the target conductor 300 through the first conveyor 101, and the first signals are supplied to the gateway chip 1021 through the protection circuit 107, the first conversion circuit 108, the second conversion circuit 109, and the control switch 110; the second conversion circuit 109 is supplied to the power carrier communication chip 1031 together with the third conversion circuit 111 through the third conversion circuit 111; the first conversion circuit 108 is an AC-DC converter for converting the first signals into direct current power supply signals; the second conversion circuit 109 and the third conversion circuit 111 are DC-DC converters for converting the direct current power supply signals into power supply signals required by the gateway chip 1021 and the power carrier communication chip 1031; the first conversion circuit 108, the second conversion circuit 109, and the third conversion circuit 111 can adopt any conversion topology in the prior art, and the topology structure is not limited in the present embodiment;

[0095] In this embodiment, the signal processor 102 uses the SSD202 core module of the XIAOYU cloud as the gateway chip 1021, and the signal converter 103 uses the MHCP01G chip of Xiaomi Communications Technology Co., Ltd. as the power carrier communication chip 1031; the SSD202 module requires 3.3V direct current power supply, the MHCP01G chip requires 3.3V and 7V dual direct current power supply, and the 3.3V power supply is required to be powered on first; therefore, in this embodiment, the first conversion circuit 108 adopts a primary side feedback flyback converter to convert the first power supply signal into a 5V direct current voltage source signal, the second conversion circuit 109 applies a step-down chip BL8039 to convert the 5V power supply into a 3.3V power supply to supply power to the SSD202 module and the MHCP01G chip, and the third conversion circuit 111 applies a step-up chip TC6291C to convert the 3.3V power supply into a 7V power supply to supply power to the MHCP01G chip.

[0096] The protection circuit 107 is used to protect the circuits inside the gateway unit 100; with reference to Figure 14 , in this embodiment, the protection circuit includes a fuse F1 and a pressure-sensitive resistor RV1, the fuse F1 is used to cut off the circuit when overcurrent occurs due to line failure, to protect the circuit components from being damaged, and the pressure-sensitive resistor RV1 can provide a discharge path when the AC input is disconnected, to prevent a large current impact, and also has a good clamping effect on the impact voltage.

[0097] The gateway chip 1021 is connected with the network port 114 through the network transformer 113, and the network port 114 is connected with the router 20 through the network data line.

[0098] As Figure 13 shown, it is the circuit diagram of the gateway chip 1021 in this embodiment. The SSD202 module is powered by 3.3V direct current, Figure 13 the VDD terminal is the power supply terminal, and since the SSD202 module has a high requirement for input power supply ripple, an LC filter is added to the power supply input terminal for filtering power supply noise; Figure 13 C1, L4, C22, C23 and C19 are used to filter noise, D16 is used to protect the circuit, and LED1 is a power-on indicator; the corresponding serial ports of pins 9 and 10 are connected with the signal converter 103 for transmitting control signals; pin 5 outputs a pwm0 signal for monitoring the working state of the module; and pins 81-84 are connected with the hundred-megabit network port through the network transformer.

[0099] As Figure 14 , Figure 15 shown, it is the circuit schematic diagram of a specific embodiment of the power carrier communication chip MHCP01G taking power from the zero fire line of the power line as the target wire.

[0100] As Figure 14As shown, the first conveyor J1 from the target wire 300 corresponding to the zero fire line power, fire line in series fuse F1, and then in the zero fire line both ends of the parallel pressure sensitive resistor RV1, both ends of the pressure sensitive resistor is the output terminal of the protection circuit.

[0101] As shown, the coupling capacitor CX1 and transformer T2 are connected after the fuse F1 and the pressure sensitive resistor RV1, which prevents the surge on the external power grid from damaging the coupling circuit; the fire line L is connected to the pin 5 of the primary side of the transformer T2 through the capacitor CX1, and the zero line N is connected to the other pin 8 of the primary side of the transformer T2; the two pins 3, 4 of the secondary side of the transformer T2 are connected to the pins 1, 2 of the power carrier communication chip MHCP01G after being connected in series with the resistors R40, R39; the bidirectional diode D5 is connected in parallel between the pins 5, 8 of the primary side of the transformer T2; the bidirectional diode D4 is connected in parallel between the pins 4, 3 of the secondary side of the transformer T2; a diode is connected between the pin 4 of the secondary side of the transformer T2 and the ground, with the positive electrode connected to the ground; a diode is connected between the pin 4 and the 7V power supply, with the positive electrode connected to the pin 4; a diode is connected between the pin 3 and the ground, with the positive electrode connected to the ground; and a diode is connected between the pin 3 and the 7V power supply, with the positive electrode connected to the pin 3. Figure 15 The working principle of the power carrier chip extracting the second signal from the target wire is as follows: the primary side of the capacitor CX1 and the transformer T2 constitutes a high-pass filter, which blocks the first signal used for power supply, while the second signal with higher frequency is coupled to the secondary side of the transformer T2, enters the power carrier communication chip MHCP01G through the protection resistors R39, R40 for preventing surge voltage. The bidirectional TVS tubes D4, D5 are used to eliminate instantaneous impact voltage and protect the internal circuit; the four diodes D13, D14 ensure the stability of the second signal, and the principle is as follows: during the positive half cycle, when the second signal in the pin 4 exceeds 7V, the diode above D13 is turned on to filter out the wave crest in the second signal exceeding 7V, and when the second signal in the pin 3 is lower than zero, the diode below D14 is turned on to filter out the wave trough less than 0V; similarly, during the negative half cycle, when the second signal in the pin 3 exceeds 7V, the diode above D14 is turned on to filter out the wave crest in the second signal exceeding 7V, and when the second signal in the pin 4 is lower than zero, the diode below D13 is turned on to filter out the wave trough less than 0V; in this way, the wave crest exceeding 7V in the second signal can be filtered out, and the wave trough less than zero is filled, so that the second signal is more stable and clean.

[0102] As shown, the coupling capacitor CX1 and transformer T2 are connected after the fuse F1 and the pressure sensitive resistor RV1, which prevents the surge on the external power grid from damaging the coupling circuit; the fire line L is connected to the pin 5 of the primary side of the transformer T2 through the capacitor CX1, and the zero line N is connected to the other pin 8 of the primary side of the transformer T2; the two pins 3, 4 of the secondary side of the transformer T2 are connected to the pins 1, 2 of the power carrier communication chip MHCP01G after being connected in series with the resistors R40, R39; the bidirectional diode D5 is connected in parallel between the pins 5, 8 of the primary side of the transformer T2; the bidirectional diode D4 is connected in parallel between the pins 4, 3 of the secondary side of the transformer T2; a diode is connected between the pin 4 of the secondary side of the transformer T2 and the ground, with the positive electrode connected to the ground; a diode is connected between the pin 4 and the 7V power supply, with the positive electrode connected to the pin 4; a diode is connected between the pin 3 and the ground, with the positive electrode connected to the ground; and a diode is connected between the pin 3 and the 7V power supply, with the positive electrode connected to the pin 3.

[0103] Figure 16 ​As shown, pins 10, 13 are power supply pins of the chip, connected to 7V, 3.3V power supply respectively; pins 1, 2 are input / output pins of the second signal, connected to both ends of the secondary side of transformer T2, used for transmitting the second signal; pins 6, 7 are connected to serial port pins 9, 10 of gateway chip SSD202 respectively, used for transmitting control signals. Gateway chip SSD202 transmits the generated control signals to pins 6, 7 of power carrier communication chip MHCP01G through serial port pins 9, 10, and power carrier communication chip MHCP01G modulates the control signals into the second signal of a specific frequency range, and loads them onto the power line as the target conductor through transformer T2 and capacitor CX1, and then sends them to the sub-devices in the local network; similarly, the second signal generated by the sub-devices in the local network enters power carrier communication chip MHCP01G through capacitor CX1 and transformer T2, and power carrier communication chip MHCP01G demodulates the second signal into control signals that can be processed by gateway chip SSD202, and sends them to gateway chip SSD202 through serial port pins 6, 7, and then gateway chip SSD202 operates the control signals or uploads them to the router.

[0104] As shown in FIG. 1, in some embodiments, the gateway unit 100 further comprises a state monitor 112, which is electrically connected to the signal processor 1021, to determine the working state of the signal processor 1021 based on whether the specific signal sent by the signal processor 1021 meets the specified state, and to determine that the working state is abnormal and to power off and restart the signal processor 1021 when the specified state is not met. Figure 12

[0105] The gateway is a long-term unattended device, and has very high requirements for reliability. The state monitor is added to monitor whether the signal processor is working normally. When the signal processor is abnormal, the function of power-off and restart is realized.

[0106] In some embodiments, the state monitor 112 comprises a watchdog circuit, which is separately arranged relative to the signal processor.

[0107] A dedicated watchdog chip SGM821 of Shengbang Micro is selected as the independently running state monitor. Within a time period, the watchdog chip will not output a reset signal when the signal processor outputs a feed dog signal; if the signal processor does not output the feed dog signal on time within a time period, the watchdog chip will output a reset signal to make the signal processor power off and restart. The selection of the dedicated watchdog chip ensures the reliability of the monitoring, and avoids the failure of the monitoring system due to the self-failure of the monitoring system such as dead lock.

[0108] As shown in FIG. 1, in some embodiments, the gateway unit 100 further comprises a state monitor 112, which is electrically connected to the signal processor 1021, to determine the working state of the signal processor 1021 based on whether the specific signal sent by the signal processor 1021 meets the specified state, and to determine that the working state is abnormal and to power off and restart the signal processor 1021 when the specified state is not met. Figure 17 ​As shown in the figure, it is a watchdog circuit diagram in the embodiment. Figure 12 and Figure 17 The working process of the watchdog circuit is as follows: in the embodiment, the switch tube Q1 is used as the control switch 110 for controlling the power supply of the signal processor 102; VDD is the power supply terminal of the signal processor 102, 3.3V is the power supply of the watchdog, and the potential of VDD is controlled by the watchdog through the switch tube Q1, so as to control the power supply of the signal processor, that is, when Q1 is turned on, VDD is 3.3V, the power supply of the signal processor is normal, and vice versa, the signal processor is powered off.

[0109] The pwm wave output by the signal processor 102 is used as a specific signal for output, which is used to reflect the working state, and the specific signal is used as a dog feeding signal and input to the done pin of the watchdog;

[0110] When the signal processor works normally, the PWM0 can stably output the specific signal, feed the dog on time, the RSTn outputs a high level, the Q2 is turned on, there is a voltage difference between the gate and the drain of Q1, Q1 is turned on, VDD is 3.3V, and the power supply of the signal processor is normal.

[0111] When the signal processor works abnormally, the specific signal cannot be output on time, and the dog cannot be fed on time, the RSTn outputs a low level, the Q2 is not turned on, there is no voltage difference between the gate and the drain of Q1, Q1 is not turned on, VDD cannot supply power to the signal processor, and the signal processor is powered off and restarted.

[0112] In another example, the first conveyor 101 includes at least one power line terminal, and the second conveyor 104 includes at least one network interface.

[0113] In addition, in order to further improve the technical problem that adjacent networks are not clear in the prior art, the application further provides a network segmentation unit, as shown in the figure, Figure 18 The network segmentation unit 200 is adapted to be arranged at the power supply input end of a local area network to segment the local area network and other networks; the network segmentation unit is arranged at the power supply input end of the local area network to make a barrier between the local area network and other networks; so that the communication signals in the local area network are only transmitted within the local area network, and almost cannot be transmitted outside the local area network, and at the same time, the communication signals outside the local area network also almost cannot enter the local area network, so as to achieve the effect of network segmentation;

[0114] The network partition unit 200 has an impedance adjuster 201 to form an impedance surge of the second signal in a specific frequency range passing through the network partition unit, and the network partition unit is configured to pass the first signal in a non-specific frequency range with low impedance to form a power supply path, and pass the second signal with high impedance to adjust the power ratio of the second signal before and after passing through the network partition unit to above a limited threshold, so that the gateway unit 100 can partition the local area network and other networks based on the power value of the received signal; the frequency of the first signal is lower than the frequency of the second signal, and the second signal is used for communication of the local area network.

[0115] In other words, the impedance adjuster 201 in the network partition unit 200 forms a high impedance isolation protection effect for the second signal in a specific frequency range, so that when the second signal passes through the network partition unit 200, most of the second signal is hindered and cannot pass due to the presence of the impedance adjuster 201, and the first signal different from the second signal can pass smoothly with low impedance and be used to power the gateway unit 100. Therefore, the impedance surge should be understood as: when the second signal enters the network partition unit 200, the impedance adjuster 201 instantaneously exhibits high impedance to the second signal, producing a strong blocking effect and a strong degree of attenuation to the second signal. When the first signal for power supply enters the network partition unit 200 from the power grid, the impedance adjuster 201 exhibits low impedance to it, does not block it, and the power supply signal can pass almost without loss and power the gateway unit 100 based on the target conductor 300.

[0116] The second signal should be understood as a kind of signal used for communication, which can be a message generated in a specific format based on a protocol (such as IEEE1901.1), and different fields in the message have different contents to form second signals with different functions based on different purposes. It is worth noting that the second signal is a signal in a specific frequency range with information, and communication in the entire local area network is based on the second signal, which has a frequency significantly higher than the first signal, and the second signal can be loaded on the target conductor and transmitted together with the first signal in the entire local area network; in a specific example, the specific frequency range of the second signal can be any segment within 0.7MHz-12MHz, such as 2.4MHz-5.6MHz, 1.95MHz-12MHz, 0.78MHz-2.93MHz, or 1.76MHz-2.93MHz, etc. Those skilled in the art can set the corresponding specific frequency range based on actual use requirements, and this embodiment does not limit the frequency range of the second signal too much.

[0117] In the embodiment, due to the existence of the network segmentation unit, if the second signal enters the network segmentation unit, the impedance of the network segmentation unit to the second signal suddenly increases, a strong blocking effect is generated, a strong degree of attenuation is generated to the second signal, so that only a small part of the second signal can pass through, and the signal strength of the second signal output after passing through the network segmentation unit is very weak, that is, the ratio of the power of the second signal before and after passing through the network segmentation unit is adjusted to be higher than a limited threshold, so that the second signal between the two adjacent networks cannot pass through the network segmentation unit to the other local area network without loss, and then, the gateway unit judges whether the received second signal belongs to the second signal in the local area network based on the signal strength of the received second signal, so as to segment the local area network and other networks. In the embodiment, the other network can be an external power grid or other local area network. In addition, in the embodiment, in combination with the distance between the sub-device and the gateway device in a general family and the normal loss of the power line to the second signal, the limited threshold is set to 10 6 ~ 10 12 , and then, based on the limited threshold, the second signal of the other network will be attenuated to a degree that is easy to be distinguished by the gateway unit after passing through the network segmentation unit of the local area network, so that the gateway unit can filter out the second signal which does not belong to the local area network with low intensity, and also does not filter out the second signal sent by the sub-device which is far away from the gateway unit in the local area network. In a specific example, the limited threshold is preferably set to 10 8 .

[0118] In addition, it is worth noting that in the present application, the second signal entering the network segmentation unit includes not only entering from the external power grid direction, passing through the network segmentation unit and outputting to the gateway unit direction, but also entering from the gateway unit direction, passing through the network segmentation unit and outputting to the external power grid direction. When the second signal enters the network segmentation unit from the external power grid direction and outputs to the gateway unit direction, the ratio of the power of the second signal when the external power grid enters the network segmentation unit to the power of the second signal when outputting from the network segmentation unit to the gateway unit needs to be higher than the limited threshold; when the second signal enters the network segmentation unit from the gateway unit direction and outputs to the external power grid direction, the ratio of the power of the second signal when the gateway unit enters the network segmentation unit to the power of the second signal when outputting from the network segmentation unit to the external power grid needs to be higher than the limited threshold.

[0119] Reference Figure 19aFor the local area network diagram constructed by the above-mentioned segmentation unit in this embodiment, it can be seen that the external power grid supplies power to the gateway unit 100 and each sub-device (2011, 2012, …, 201N) connected thereto. If the external power grid carries other communication signals (such as other second signals) in the power supply signal, the power supply signal enters the local area network together, the impedance regulator 201 in the network segmentation unit 200 presents low impedance to the power supply signal, so that the power supply signal passes through smoothly, and the power supply to the gateway unit 100 and the sub-devices (2011, 2012, …, 201N) connected thereto is completed. However, the impedance regulator presents a sudden increase in impedance to the second signal superimposed on the power supply signal, so that the second signal is greatly attenuated, and the intensity of the second signal after passing through the network segmentation unit 200 is very weak, so that it cannot be detected / recognized by the gateway unit 100, or the gateway judges that it does not belong to the local area network, and does not communicate based on the second signal, thereby achieving the effect of segmentation of the local area network 1 and the external power grid. When the second signal for communication between the gateway unit 100 and the sub-devices (2011, 2012, …, 201N) connected thereto in the local area network 1 enters the network segmentation unit 200 along the power line as the target conductor 300 from the gateway unit 100, the impedance regulator in the network segmentation unit 200 presents a sudden increase in impedance to the second signal superimposed on the target conductor, so that the second signal is almost completely blocked on the side of the gateway unit 100, and almost cannot be output from the network segmentation unit to the external power grid, thereby avoiding the flow of the second signal in the local area network to the external network. The network segmentation unit screens the communication signals in the external power grid outside the local area network, and blocks the signals in the local area network on one side of the local area network, thereby achieving the effect of segmentation of the local area network and the external power grid, and protecting the data security in the local area network.

[0120] Reference Figure 19bFor another embodiment, the local area network constructed by the above-mentioned network partition unit is shown in the schematic diagram, two adjacent local area networks are exemplarily shown in the diagram, wherein the network partition unit 200 is arranged in front of the gateway unit 100 of the local area network 1, and the traditional gateway 1002 is used in the local area network 2. If the second signal for communication between the traditional gateway 1002 and the sub-devices (2021, 2022, …, 202N) connected thereto in the local area network 2 enters the external power grid along the power line, and is superimposed on the power supply signal to enter the local area network 1, the impedance adjuster in the network partition unit 200 presents low impedance to the power supply signal, so that the power supply signal passes through smoothly, and the power supply to the gateway unit 100 and the sub-devices (2011, 2012, …, 201N) connected thereto is completed. However, the second signal of the local area network 2 superimposed on the power supply signal presents a sudden increase in impedance, so that the second signal is greatly attenuated after passing through the network partition unit 200, and the intensity of the second signal is very weak, so that it cannot be recognized / detected by the gateway unit 100, or it is judged by the gateway that it does not belong to the local area network, and communication is not carried out based on the second signal, so as to achieve the partition effect of the two adjacent local area networks of the local area network 1 and the local area network 2. When the second signal for communication between the gateway unit 100 and the sub-devices (2011, 2012, …, 201N) connected thereto enters the network partition unit 200 along the power line from the gateway unit 100, the impedance adjuster in the network partition unit 200 presents a sudden increase in impedance to the superimposed second signal, so that the second signal is almost completely blocked on the side of the gateway unit 100, and almost cannot be output to the external power grid by the network partition unit, so as to avoid the flow of the second signal in the local area network 1 to the external network, and avoid the mutual interference of signals between adjacent networks. The network partition unit shields the communication signals of the adjacent local area networks outside the local area network, and blocks the signals in the local area network on one side of the local area network, so as to achieve the partition effect of the adjacent local area networks.

[0121] Reference Figure 19cFor the schematic diagram of two adjacent local area networks constructed in another embodiment, it can be seen that the network partition unit is arranged in front of the gateway unit in both the local area network 1 and the local area network 2, and the transmission of the second signal between the two networks needs to pass through the attenuation of two levels of network partition units. Specifically, the second signal used for communication between the gateway unit 100-2 and the sub-devices (2021, 2022, …, 202N) connected thereto in the local area network 2, when transmitted from the gateway 100-2 to the external power grid, enters the network partition unit 200-2 along the power line as the target conductor 300, and the impedance adjuster in the network partition unit 200-2 presents a sudden increase in impedance to the second signal superimposed on the target conductor, so that the second signal is almost completely blocked on the side of the gateway unit 100-2 and cannot be output to the external power grid. The signal strength of the second signal transmitted to the external power grid has been attenuated to be very weak, which is superimposed on the power supply signal, enters the local area network 1 along the power line, and the impedance adjuster in the network partition unit 200-1 presents a sudden increase in impedance to the second signal of the local area network 2 which has been attenuated by the network partition unit 200-2 and superimposed on the power supply signal, so that the second signal is attenuated again, so that the signal strength is even weaker after passing through the network partition unit 200-1, so as to be unable to be recognized / detected by the gateway unit 100-1 or be judged by the gateway as not belonging to the local area network. Similarly, in the local area network 1, the second signal used for communication between the gateway unit 100-1 and the sub-devices (2011, 2012, …, 201N) connected thereto is blocked in the local area network 1 due to the high impedance of the network partition unit 200-1. Even if a small part of the second signal passes through the network partition unit 200-1 to enter the external power grid, it is greatly attenuated and has very weak signal strength, and before entering the local area network 2, the second signal will be attenuated again by the network partition unit 200-2. In summary, the multi-level network partition unit can better divide two adjacent local area networks and more effectively protect the privacy of users and avoid data leakage.

[0122] So far, the network partition unit provided based on the above technical solution can partition adjacent networks, protect the data inside the local area network, improve the stability of communication while ensuring the security of data, and avoid the occupation of the communication bandwidth in the local area network by external signals to ensure the data transmission speed. Since the network partition unit can be placed in front of any communication network to block the data transmission between any two networks that do not want to communicate, the installation is simple and does not need to rewire or rewire the local area network.

[0123] As Figure 4As shown, in some embodiments, the network partition unit 200 further comprises at least two capacitors 202, 203 connected in parallel between the zero line and the fire line of the impedance regulator 201 near the input end of the network partition unit 200, and the capacitance parameters of the capacitors are configured such that the capacitors can cooperate with each other to make the overall self-resonant frequency in the specific frequency range. In this embodiment, the low impedance characteristic of the capacitor at high frequency is used to further improve the partitioning capability of the network partition unit. When the electrical signal entering the network partition unit contains a second signal, the impedance regulator exhibits a sudden increase in impedance for the second signal, and at the same time, the low impedance characteristic of the capacitor for high frequency signals is used to quickly short-circuit the second signal, preventing the second signal from entering the network partition unit, and further improving the isolation capability of the network partition unit. In addition, since in practice the capacitor is no longer an ideal device, its capacitive reactance frequency curve is "V" shaped, and at the self-resonant frequency, the capacitive reactance of the capacitor reaches the minimum. Therefore, in order to further reduce the impedance of the capacitor to the second signal, the self-resonant frequency of the capacitor combination is located in the specific frequency range of the second signal, so that for any frequency of the second signal within the specific frequency range, the capacitor combination can maintain a small impedance.

[0124] As Figure 5As shown, in some embodiments, the network partition unit 200 is connected with a first inductor 211 in series to form the impedance adjuster on the live wire or the neutral wire corresponding to the target wire 300, so that in the state that the gateway unit 100 accesses the first signal through the network partition unit 200, based on the frequency selection characteristic of the first inductor 211, the impedance of the network partition unit 200 to the second signal in a specific frequency interval is suddenly increased. The inductor is equivalent to a wire for low frequency signals and does not have a blocking effect, but presents a large impedance for high frequency signals. When the power supply signal based on the first signal enters the network partition unit 200 along the neutral wire or the live wire as the target wire, the first signal can pass through the network partition unit 200 almost without loss and then supply power to the gateway unit 100, while for the second signal superimposed on the first signal, when facing the high impedance suddenly increased by the first inductor 211 and the low impedance characteristic of the capacitors 202 and 203, most of the second signal entering the network partition unit 200 will be quickly short-circuited by the capacitors 202 and 203, and a small part of the second signal continuing to enter the network partition unit 200 is again attenuated by the first inductor 211 with suddenly increased impedance, so that the second signal strength output from the network partition unit 200 is very small, so as to be unable to be recognized / detected by the gateway unit 100, or be judged by the gateway 100 as not belonging to the local area network, and not to communicate / control based on the second signal; and the second signal entering the network partition unit 200 from the gateway unit 100 side faces the high impedance suddenly increased by the first inductor 211, most of the second signal is blocked on the side of the gateway unit 100, and a small part of the second signal passing through the first inductor 211 is quickly short-circuited by the low impedance capacitors 202 and 203, thereby avoiding the flow of the second signal in the local area network to the external network. Finally, the effect of partitioning the local area network and the external power grid is achieved.

[0125] As Figure 6In some embodiments, the network partition unit 200 is connected in series with a first inductor 211 on the live wire and a second inductor 221 on the neutral wire to form the impedance adjuster. In this way, when the gateway unit 100 accesses the first signal through the network partition unit 200, the second signal of a specific frequency interval will have a sudden increase in impedance when passing through the network partition unit 200 based on the frequency selection characteristics of the first inductor 211 and the second inductor 221. In this embodiment, one inductor 211, 221 is connected in series on the live wire and the neutral wire, respectively, to further increase the attenuation of the impedance adjuster to the second signal and further improve the blocking performance of the network partition unit. It should be noted that in this embodiment, one inductor is connected in series on the live wire and the neutral wire, respectively, rather than simply increasing the inductance of the inductor to increase the impedance of the inductor. On the one hand, the load current limits the inductance of a single inductor, so the impedance of the inductor as a whole is further increased by connecting two inductors in series. On the other hand, the effect of the self-resonant frequency of the inductor is considered. Generally speaking, the larger the inductance of the inductor, the larger the parasitic parameters, and the smaller the corresponding self-resonant frequency. Therefore, to avoid the shift of the overall impedance resonance point caused by directly increasing the inductance, one inductor is connected in series on the live wire and the neutral wire, respectively, to increase the impedance of the impedance adjuster to the second signal.

[0126] Further, as shown in FIG. 4, the network partition unit 200 is connected in series with a first inductor 211 on the live wire and a second inductor 221 on the neutral wire to form the impedance adjuster. In this way, when the gateway unit 100 accesses the first signal through the network partition unit 200, the second signal of a specific frequency interval will have a sudden increase in impedance when passing through the network partition unit 200 based on the frequency selection characteristics of the first inductor 211 and the second inductor 221. In this embodiment, one inductor 211, 221 is connected in series on the live wire and the neutral wire, respectively, to further increase the attenuation of the impedance adjuster to the second signal and further improve the blocking performance of the network partition unit. It should be noted that in this embodiment, one inductor is connected in series on the live wire and the neutral wire, respectively, rather than simply increasing the inductance of the inductor to increase the impedance of the inductor. On the one hand, the load current limits the inductance of a single inductor, so the impedance of the inductor as a whole is further increased by connecting two inductors in series. On the other hand, the effect of the self-resonant frequency of the inductor is considered. Generally speaking, the larger the inductance of the inductor, the larger the parasitic parameters, and the smaller the corresponding self-resonant frequency. Therefore, to avoid the shift of the overall impedance resonance point caused by directly increasing the inductance, one inductor is connected in series on the live wire and the neutral wire, respectively, to increase the impedance of the impedance adjuster to the second signal. Figure 7 , Figure 8As shown, the network partition unit 200 is also connected between the zero line and the live line of the first inductor 211 near the input end of the network partition unit, and three capacitors 202, 203, 204 with different capacitances are connected in parallel, and the capacitances of the three capacitors are configured to be able to short the second signal. In this embodiment, when the power supply signal based on the first signal enters the network partition unit 200 along the zero line and the live line as the target conductors, the first signal can pass through the network partition unit 200 almost without loss and then supply power to the gateway unit 100, while for the second signal superimposed on the first signal, the low impedance characteristic of the capacitors rapidly shorts most of the second signal entering the network partition unit 200, and a small part of the second signal continuing to enter the network partition unit faces the inductor 211 or the inductor 211 and the inductor 221 with a sudden increase in impedance, or the inductor 211 and the inductor 221, which is attenuated again, so that the second signal strength output from the network isolation unit 200 is very small, so as to be unable to be recognized / detected by the gateway unit 100, or be judged by the gateway 100 as not belonging to the local area network, and not to communicate / control based on the second signal; and the second signal entering the network partition unit 200 from the gateway unit 100 side faces the inductor 211 or the inductor 211 and the inductor 221 with a sudden increase in high impedance, and most of the second signal is blocked on the side of the gateway unit 100, and a small part of the second signal passing through the inductor 211 or the inductor 211 and the inductor 221 is rapidly shorted by the low-impedance capacitors 202, 203, 204, thereby avoiding the flow of the second signal in the local area network to the external network. Finally, the effect of partitioning the local area network and the external network is achieved.

[0127] In addition, capacitors with different capacitances have a large difference in self-resonant frequency, and generally the larger the capacitance, the smaller the self-resonant frequency; therefore, in this embodiment, in order to ensure that the impedance of the capacitor as a whole can remain relatively small in a range as large as possible near the specific frequency range of the second signal, the three capacitors should have different capacitances. Assuming that the capacitance relationship of the three capacitors is C1>C2>C3, the corresponding self-resonant frequencies are f1>f2>f3; when the signal frequency is less than f1, the impedance decreases as the frequency increases, when the signal frequency is greater than f3, the impedance increases as the frequency increases, and when the signal frequency is between f1 and f3, due to the self-resonant frequency f2, the combined impedance of the capacitor combination can be maintained at a relatively low level; therefore, the combination of capacitors with different capacitances in parallel can provide the possibility of maintaining a small impedance in a range as large as possible near a specific frequency range, thereby providing more excellent low-impedance performance for the second signal that continuously changes within a specific frequency range.

[0128] As shown in FIG. 6, the network partition unit 200 is connected between the zero line and the live line of the first inductor 211 near the input end of the network partition unit, and three capacitors 202, 203, 204 with different capacitances are connected in parallel, and the capacitances of the three capacitors are configured to be able to short the second signal. Figure 9a , Figure 9bAs shown, in some embodiments, the network partition unit 200 has a first inductor 211 and a second inductor 221 connected in series along the direction of the input of the network partition unit 200 on the live wire or the neutral wire corresponding to the target wire 300 to form the impedance adjuster. In this way, when the gateway unit 100 accesses the first signal via the network partition unit 200, the second signal of a specific frequency interval will have a sudden increase in impedance when passing through the network partition unit 200 based on the frequency selection characteristics of the first inductor 211 and the second inductor 221.

[0129] The network partition unit 200 also has at least one capacitor 202 connected between the live wire and the neutral wire between the first inductor 211 and the second inductor 221, and at least another capacitor connected between the live wire and the neutral wire away from the first inductor 211 on the side of the second inductor 221 to form a short-circuit effect on the second signal.

[0130] In this embodiment, the capacitors and inductors are arranged in a spaced manner, which constitutes a multi-stage blocking and attenuation of the second signal. Taking the direction from the external power grid to the gateway unit as an example, when the second signal enters the network partition unit 200 along the power line as the target wire, most of the second signal is short-circuited by the capacitor 203, or the capacitor 203 and the capacitor 204, which present low impedance, and cannot continue to pass through the network partition unit 200, and a small part of the second signal that continues to enter the network partition unit 200 is attenuated by the inductor 221, and the signal strength has been significantly reduced. At this time, most of it is again short-circuited by the capacitor 202, which presents low impedance, and the remaining part of the second signal is again attenuated by the inductor 211. After multiple attenuations, the signal strength of the second signal output by the network partition unit 200 is attenuated to be very small, so as to be unable to be recognized / detected by the gateway unit 100, or to be judged by the gateway 100 as not belonging to the local area network, and not to communicate / control based on the second signal, thereby achieving the purpose of network partitioning.

[0131] In all the above embodiments, the capacitance of each capacitor is set to 47nF-470nF; in all the above embodiments, the inductance of the first inductor is set to [1uH-1mH], and the specific frequency range is set to 1MHz-12MHz, so that the power of the second signal after passing through the network segmentation unit is reduced to at least -65db or below. Generally, the capacitance of the capacitor is inversely proportional to its self-resonant frequency, so the capacitance of the capacitor should not be too large or too small. According to Table 3, the resonant frequency of a 47nF capacitor is about 5.2MHz, and the resonant frequency of a 470nF capacitor is about 1.6MHz. Considering that the self-resonant frequency of the capacitor combination should be within the specific frequency range, the capacitance of the capacitor is set to 47nF-470nF.

[0132] For the inductor, since the network segmentation unit is located at the front end of the entire local area network, the power supply signal of the entire local area network flows through the inductor, so the current passing through is relatively large, which can generally reach 10A or more. In the case of a certain inductance, the thicker the winding coil, the larger the current it can carry, and the larger the volume of the inductor produced. For the gateway device, the overall volume is limited, and the volume of the inductor in the network segmentation unit is also correspondingly limited. For inductors of the same size, the larger the inductance, the smaller the rated current, the larger the direct current resistance DCR, the larger the heat generated by the same current, and the higher the cost. Therefore, the volume, cost and heat problem will in turn restrict the inductance value. In addition, the smaller the inductance, the smaller the impedance at the same frequency. Therefore, the inductance of the inductor in the network segmentation unit should not be too large or too small. In order to ensure that the impedance of the inductor can meet the requirements within a certain frequency range, after testing, the inductance of the inductor is set to 1uH-1mH for the second signal with a specific frequency range of 1MHz-12MHz, so that the power of the second signal after passing through the network segmentation unit is reduced to at least -65db or below.

[0133] In a specific example, the capacitances of the three capacitors are 47nF, 100nF and 470nF, respectively, and / or the inductance of the first inductor is set to 33uH, so that the network segmentation unit has at least one frequency point within the specific frequency range of 2.4MHz-5.6MHz, which can make the attenuation of the second signal reach the maximum value.

[0134] In this embodiment, the specific frequency range of the second signal is preferably 2.4MHz-5.6MHz.

[0135] A network analyzer was used to test the signal attenuation of capacitors with different capacitance values. A 470nF capacitor showed the greatest signal attenuation at 2.4MHz; a 47nF capacitor showed the greatest attenuation at 5.6MHz. To further maintain the greatest possible attenuation within the 2.4-5.6MHz frequency range, a 100nF capacitor, which performs well at both 2.4MHz and 5.6MHz, was selected to balance the characteristic frequency points. Therefore, the preferred capacitance values ​​for the three capacitors are 47nF, 100nF, and 470nF. In a specific example, capacitors 202, 203, and 204 have capacitance values ​​of 47nF, 100nF, and 470nF, respectively.

[0136] Considering the overall size of the gateway device, the size of the inductor, its DC impedance, load capacity, heat generation, and cost, this embodiment selects a 33uH vertical 20A inductor. In one specific example, the first inductor 211 is a 33uH vertical 20A inductor. In another specific example, the first inductor 211 and the second inductor 221 are both 33uH vertical 20A inductors; and in yet another specific example, the first inductor 211 and the second inductor 221 are both 33uH / 30A inductors.

[0137] like Figure 10 The figure shows the measured attenuation of the second signal when capacitors 202, 203, and 204 have capacitance values ​​of 47nF, 100nF, and 470nF respectively, and the first inductor 211 and the second inductor 221 are selected as 33uH vertical 20A. The maximum attenuation of the signal is achieved at approximately 2.74MHz, reaching -106.21dB; and within the frequency range of 2.4-5.6MHz, relatively large attenuation of the second signal is maintained.

[0138] In all the above embodiments, the network segmentation unit further includes at least one common-mode inductor for filtering common-mode interference signals. The common-mode inductor can be positioned anywhere within the network segmentation unit to filter common-mode noise introduced by the power grid or generated in the user's local area network. In one specific example, a 2mH / 15A common-mode inductor is provided between inductor 204 and inductor 203. In another specific example, a 5mH / 20A common-mode inductor is provided between inductor 204 and inductor 203. In yet another specific example, a 1mH common-mode inductor is provided between inductor 204 and inductor 203, and between inductor 203 and inductor 202.

[0139] In all the above embodiments, the network partition unit is filled with a fixed medium inside the shell. The network partition unit includes a shell, in order to avoid the vibration of the device caused by the signal of 20 kHz-20 kHz flowing through the network partition unit, the network partition unit is filled with a solid medium in the accommodating cavity of the network partition unit, so as to reduce the vibration of the device.

[0140] As shown in Figure 20 , a flowchart of a network partition method provided by the application is shown, the network partition method includes:

[0141] S1, a network partition unit is connected to the power input end of a local area network;

[0142] The network partition unit is placed at the power input end of the local area network to make a barrier between the local area network and other networks; so that the communication signal in the local area network is only transmitted inside the local area network, and it is almost impossible to be transmitted outside the local area network, at the same time, the communication signal outside the local area network is also almost impossible to enter the local area network, so as to achieve the effect of network partition;

[0143] S2, the network partition unit forms a second signal of a specific frequency interval through the sudden increase of the impedance of the network partition unit by an impedance regulator, and then the network partition unit passes the first signal of a non-specific frequency interval with low impedance to form a power supply path, and passes the second signal with high impedance to adjust the power ratio of the second signal before and after passing through the network partition unit to be above a limited threshold value;

[0144] S3, the gateway unit partitions the local area network and other networks based on the power value of the received signal; the frequency of the first signal is lower than that of the second signal, and the second signal is used for communication of the local area network.

[0145] Reference Figure 18 , according to the above network partition unit. The impedance regulator 201 forms a high-impedance isolation protection effect for the second signal of a specific frequency interval in the network partition unit 200, so that when the second signal passes through the network partition unit 200, most of the second signal is hindered and cannot pass due to the existence of the impedance regulator 201, and the first signal different from the second signal can pass smoothly with low impedance and be used to power the gateway unit 100. Therefore, the impedance sudden increase should be understood as: when the second signal enters the network partition unit 200, the impedance regulator 201 shows high impedance to the second signal instantaneously, producing a strong blocking effect, and the second signal is attenuated to a strong degree. When the first signal for power supply enters the network partition unit 200 from the power grid, the impedance regulator 201 shows low impedance to it, does not block it, and the power supply signal can pass almost without loss, and powers the gateway unit 100 based on the target lead 300.

[0146] The second signal should be understood as a kind of signal used for communication, which can be a message generated in a specific format based on a certain protocol (for example, IEEE 1901.1). Different purposes based on the content of the relevant fields in the message form second signals with different functions. It should be noted that the second signal is a signal with information in a specific frequency range. The communication in the entire local network is based on the second signal, and the frequency of the second signal is significantly higher than that of the first signal. The second signal can be loaded on the target conductor and transmitted together with the first signal in the entire local network. In a specific example, the specific frequency range of the second signal can be any segment within 0.7 MHz to 12 MHz, such as 2.4 MHz to 5.6 MHz, 1.95 MHz to 12 MHz, 0.78 MHz to 2.93 MHz, or 1.76 MHz to 2.93 MHz. Those skilled in the art can set the corresponding specific frequency range based on actual use requirements. The frequency range of the second signal is not limited in this embodiment.

[0147] In this embodiment, due to the presence of the network segmentation unit, if the second signal enters the network segmentation unit, the impedance of the network segmentation unit to the second signal suddenly increases, producing a strong blocking effect and a strong degree of attenuation of the second signal, so that only a small part of the second signal can pass through, and the signal strength of the second signal output after passing through the network segmentation unit is very weak. That is, the ratio of the power of the second signal before and after passing through the network segmentation unit is adjusted to be above a limited threshold, so that the second signal between two adjacent networks cannot pass through the network segmentation unit to the other network without loss. Further, the gateway unit determines whether the received second signal belongs to the second signal in the local network based on the signal strength of the received second signal, so as to segment the local network and other networks. In this embodiment, the other network can be an external power grid or other local network. In addition, in this embodiment, the limited threshold is set to 10 6 ~ 10 12 , and further, based on the limited threshold, the second signal of the other network will be attenuated to a degree that can be easily distinguished by the gateway unit after passing through the network segmentation unit of the local network, so that the gateway unit can filter out the second signal of the local network with low intensity without filtering out the second signal of the sub-device far away from the gateway device in the local network. In a specific example, the limited threshold is preferably set to 10 8 .

[0148] In addition, it is worth noting that the second signal enters the network segmentation unit in the present application, which includes not only the direction from the external power grid to the gateway unit via the network segmentation unit, but also the direction from the gateway unit to the external power grid via the network segmentation unit. When the second signal enters the network segmentation unit from the external power grid to the gateway unit, the ratio of the power of the second signal when the external power grid enters the network segmentation unit to the power of the second signal when it is output from the network segmentation unit to the gateway unit needs to reach above a limited threshold. When the second signal enters the network segmentation unit from the gateway unit to the external power grid, the ratio of the power of the second signal when the gateway unit enters the network segmentation unit to the power of the second signal when it is output from the network segmentation unit to the external power grid needs to reach above a limited threshold.

[0149] Reference Figure 19a For the local area network constructed by using the above segmentation method in the present embodiment, it can be seen that the external power grid supplies power to the gateway unit 100 and each sub-device (2011, 2012, …, 201N) connected thereto. If the power supply signal of the external power grid carries other communication signals (such as the second signal), which enter the local area network together with the power supply signal, the impedance regulator in the network segmentation unit 200 presents low impedance to the power supply signal, so that the power supply signal passes through smoothly, completing the power supply to the gateway unit 100 and the sub-devices (2011, 2012, …, 201N) connected thereto. However, the impedance regulator presents a sudden increase in impedance to the second signal superimposed on the power supply signal, greatly attenuating the second signal, so that the intensity of the second signal is very weak after passing through the network segmentation unit 200, so as to be unable to be detected / recognized by the gateway unit 100 or be judged by the gateway as not belonging to the local area network, thereby achieving the effect of segmentation of the local area network 1 and the external power grid. When the second signal for communication between the gateway unit 100 and the sub-devices (2011, 2012, …, 201N) connected thereto enters the network segmentation unit 200 from the gateway unit 100 along the power line as the target conductor 300, the impedance regulator 201 in the network segmentation unit 200 presents a sudden increase in impedance to the second signal superimposed on the target conductor, so as to almost completely block the second signal on the side of the gateway unit 100, and almost cannot be output from the network segmentation unit to the external power grid, thereby avoiding the flow of the second signal in the local area network to the external network. The arrangement of the network segmentation unit shields the communication signal in the external power grid outside the local area network, and blocks the signal in the local area network on one side of the local area network, thereby achieving the effect of segmentation of the local area network and the external power grid, and protecting the data security in the local area network.

[0150] Reference Figure 19bFor another embodiment, the local area network constructed by using the above-mentioned segmentation method is shown in the schematic diagram, two adjacent local area networks are exemplarily shown in the diagram, wherein the local area network 1 is constructed by using the above-mentioned segmentation method, and the local area network 2 uses the traditional gateway 1002. If the second signal for communication between the traditional gateway 1002 and the sub-devices (2021, 2022, …, 202N) connected thereto in the local area network 2 enters the external power grid along the power line, superimposes on the power supply signal and enters the local area network 1 together, the impedance adjuster in the network segmentation unit 200 presents low impedance to the power supply signal, so that the power supply signal passes through smoothly, and the power supply to the gateway unit 100 and the sub-devices (2011, 2012, …, 201N) connected thereto is completed. However, the second signal of the local area network 2 superimposed on the power supply signal presents a sudden increase in impedance, so that the second signal is greatly attenuated after passing through the network segmentation unit 200, so that the intensity of the second signal is very weak, so as to be unable to be recognized / detected by the gateway unit 100, or be judged by the gateway as not belonging to the local area network, so as to achieve the effect of segmentation of the two local area networks corresponding to the local area network 1 and the local area network 2, and avoid the mutual interference of signals between adjacent networks. When the second signal for communication between the gateway unit 100 and the sub-devices (2011, 2012, …, 201N) connected thereto enters the network segmentation unit 200 along the power line from the gateway unit 100, the impedance adjuster in the network segmentation unit 200 presents a sudden increase in impedance to the superimposed second signal, so that the second signal is almost completely blocked on the side of the gateway unit 100, and almost cannot be output to the external power grid by the network segmentation unit, so as to avoid the flow of the second signal in the local area network 1 to the external network. The network segmentation unit screens the communication signals of the adjacent local area networks outside the local area network, and blocks the signals in the local area network on the side of the local area network, so as to achieve the effect of segmentation of the adjacent local area networks.

[0151] Reference Figure 19cFor the schematic diagram of two adjacent local area networks constructed in another embodiment, it can be seen that the local area network 1 and the local area network 2 are both constructed by using the network segmentation method described above, and the transmission of the second signal between the two networks needs to pass through the attenuation of two levels of network segmentation units. Specifically, the second signal used for communication between the gateway unit 100-2 and the sub-devices (2021, 2022, …, 202N) connected thereto in the local area network 2, when being transmitted from the gateway 100-2 to the external power grid, when entering the network segmentation unit 200-2 along the power line as the target conductor 300, the impedance adjuster in the network segmentation unit 200-2 presents a sudden increase in impedance to the second signal superimposed on the target conductor, so that the second signal is almost completely blocked on the side of the gateway unit 100-2, and almost cannot be output to the external power grid from the network segmentation unit, and the signal strength of the second signal transmitted to the external power grid has been attenuated to be very weak, which is superimposed on the power supply signal, enters the local area network 1 along the power line, and the impedance adjuster in the network segmentation unit 200-1 presents a sudden increase in impedance to the second signal of the local area network 2 superimposed on the power supply signal which has been attenuated by the network segmentation unit 200-2, so that the second signal is attenuated again, so that the signal strength is even weaker after passing through the network segmentation unit 200-1, so as to be unable to be recognized / detected by the gateway unit 100-1, or be judged by the gateway as not belonging to the local area network; similarly, in the local area network 1, the second signal used for communication between the gateway unit 100-1 and the sub-devices (2011, 2012, …, 201N) connected thereto is blocked in the local area network 1 due to the high impedance of the network segmentation unit 200-1, and even if a small part of the second signal passes through the network segmentation unit 200-1 to enter the external power grid, it is greatly attenuated, and the signal strength is very weak, and before entering the local area network 2, the second signal will be attenuated again by the network segmentation unit 200-2. In summary, the multi-level network segmentation unit can better divide two adjacent local area networks, and better protect the privacy of users and avoid data leakage.

[0152] Thus far, based on the network segmentation method provided in the above technical solution, any two local area networks which do not wish to interact information can be segmented, the data inside the local area network is protected, the communication stability is improved while the data security is ensured; at the same time, the external signal is avoided from occupying the communication bandwidth in the local area network, and the data transmission speed is ensured.

[0153] As Figure 4As shown, in some embodiments, the method further comprises: connecting at least two capacitors 202, 203 across the zero line and the fire line on the side of the impedance regulator 201 close to the input end of the network partition unit 200, and configuring the capacitance parameters of the capacitors so that the capacitors can cooperate with each other to make the overall self-resonant frequency in the specific frequency range. In this embodiment, the low impedance characteristic of the capacitor under high frequency signal is used to further improve the partitioning capability of the network partition unit. When the telecommunication signal entering the network partition unit contains a second signal, the impedance regulator shows a sudden increase in impedance to the second signal, and at the same time, the low impedance characteristic of the capacitor to the high frequency signal quickly shorts the second signal, preventing the second signal from entering the network partition unit, and further improving the isolation capability of the network partition unit. In addition, since in practice the capacitor is no longer an ideal device, its capacitive reactance frequency curve is "V" shaped, and at the self-resonant frequency, the capacitive reactance of the capacitor reaches the minimum. Therefore, in order to further reduce the impedance of the capacitor to the second signal, the self-resonant frequency of the capacitor combination is located in the specific frequency range of the second signal, so that for any frequency of the second signal in the specific frequency range, the capacitor combination can maintain a small impedance.

[0154] As Figure 5As shown in the figure, in some embodiments, the network partition unit 200 forms a sudden increase in impedance of the network partition unit 200 for the second signal in a specific frequency range by means of an impedance adjuster 201, which specifically includes: the network partition unit 200 is connected in series with a first inductor 211 on the live wire or neutral wire corresponding to the target wire 300 to form the impedance adjuster. In this way, in the state that the gateway unit 100 accesses the first signal through the network partition unit 200, based on the frequency selection characteristics of the first inductor 211, a sudden increase in impedance of the network partition unit is formed for the second signal in a specific frequency range. The inductor is equivalent to a wire for low-frequency signals and does not have a blocking effect, but presents a large impedance for high-frequency signals. When the power supply signal based on the first signal enters the network partition unit 200 along the neutral or live wire as the target wire, the first signal can pass through the network partition unit 200 almost without loss and then supply power to the gateway unit 100, while for the second signal with a higher frequency superimposed on the first signal, in the face of the high impedance of the first inductor 211 and the low impedance characteristics of the capacitors 202 and 203, most of the second signal entering the network partition unit 200 will be quickly short-circuited by the capacitors 202 and 203, and a small part of the second signal that continues to enter the network partition unit 200 is again attenuated by the first inductor 211 with a sudden increase in impedance, so that the intensity of the second signal output from the network partition unit 200 is very small, so as to be unable to be recognized / detected by the gateway unit 100, or be judged by the gateway 100 as not belonging to the local area network, and not to communicate / control based on the second signal; and the second signal entering the network partition unit 200 from the gateway unit 100 side faces the high impedance of the first inductor 211 with a sudden increase, and most of the second signal is blocked on the side of the gateway unit 100, while a small part of the second signal passing through the first inductor 211 is quickly short-circuited by the low-impedance capacitors 202 and 203, thereby avoiding the flow of the second signal in the local area network to the external network. Finally, the effect of partitioning the local area network and the external power grid is achieved.

[0155] In a specific example, the capacitors have three capacitance values of 47nF, 100nF and 470nF, and / or the inductance value of the first inductor is set to 33uH; so that the network partition unit has at least one frequency point in the specific frequency range of 2.4MHz-5.6MHz, which can make the attenuation degree of the second signal reach a maximum value.

[0156] In this embodiment, the specific frequency range of the second signal is preferably 2.4MHz-5.6MHz.

[0157] The network analyzer is used to test the attenuation of the signal by capacitors with different capacitance. The capacitor with 470nF has the maximum attenuation to the signal at 2.4MHz; the capacitor with 47nF has the maximum attenuation to the signal at 5.6MHz. In order to maintain the maximum attenuation in the frequency range of 2.4-5.6MHz, the capacitor with 100nF is selected to balance the characteristic frequency points, which has good performance at both 2.4MHz and 5.6MHz. Thus, the capacitances of the three capacitors are preferably 47nF, 100nF and 470nF. In a specific example, the capacitances of the capacitor 202, the capacitor 203 and the capacitor 204 are 47nF, 100nF and 470nF respectively.

[0158] After comprehensively evaluating the volume of the gateway device, the volume, DC impedance, load capacity, heat generation and cost of the inductor, the inductor with 33uH vertical 20A is selected in the embodiment. In a specific example, the first inductor 211 is selected as the inductor with 33uH vertical 20A. In another specific example, the first inductor 211 and the second inductor 221 are selected as the inductor with 33uH vertical 20A; in another specific example, the first inductor 211 and the second inductor 221 are selected as the inductor with 33uH / 30A.

[0159] As shown in FIG. 6, when the capacitances of the capacitor 202, the capacitor 203 and the capacitor 204 are 47nF, 100nF and 470nF respectively, and the first inductor 211 and the second inductor 221 are selected as the inductor with 33uH vertical 20A, the attenuation measurement diagram of the second signal is shown. The maximum attenuation to the signal is about -106.21db at the frequency of about 2.74MHz, and the relatively large attenuation to the signal can be maintained in the frequency range of 2.4-5.6MHz. Figure 10

[0160] In all the above embodiments, at least one common-mode inductor is further arranged in the network splitting unit to filter the common-mode interference signal. The common-mode inductor can be arranged at any position of the network splitting unit to filter the common-mode noise introduced by the power grid or generated in the user local area network. In a specific example, a common-mode inductor with 2mH / 15A is arranged between the inductor 204 and the inductor 203. In another specific example, a common-mode inductor with 5mH / 20A is arranged between the inductor 204 and the inductor 203. In another specific example, a common-mode inductor with 1mH is arranged between the inductor 204 and the inductor 203, and between the inductor 203 and the inductor 202 respectively.

[0161] In addition, as shown in FIG. 6, the present application further provides a control system, which comprises: Figure 21a Figure 21b ​​​

[0162] The gateway device, the network partition unit 200 described above; or the network partition unit 200 for implementing the network partition method described above.

[0163] As shown in Figure 21a In a specific example, the gateway device is a traditional gateway 1000. If the second signal is superimposed on the power supply signal of the external power grid, the second signal enters the local area network 1 together with the power supply signal, the impedance regulator in the network partition unit 200 presents low impedance to the power supply signal, so that the power supply signal passes smoothly, and the power supply to the traditional gateway and the sub-devices (2011, 2012, …, 201N) connected thereto is completed. However, the impedance regulator presents a sudden increase in impedance to the second signal superimposed on the power supply signal, so that the second signal is greatly attenuated, so that the signal strength after passing through the network partition unit 200 is very weak, so as to be unable to be detected / recognized by the traditional gateway 1000, or to be judged by the gateway as not belonging to the local area network, thereby achieving the effect of partitioning the local area network 1 and the external power grid. When the second signal for communication between the traditional gateway 1000 and the sub-devices (2011, 2012, …, 201N) connected thereto enters the network partition unit 200 along the power line as the target conductor 300 from the traditional gateway 1000, the impedance regulator in the network partition unit 200 presents a sudden increase in impedance to the second signal superimposed on the target conductor, so that the second signal is almost completely blocked on the side of the traditional gateway 1000, and almost cannot be output to the external power grid by the network partition unit 200, thereby avoiding the flow of the second signal in the local area network 1 to the external network, thereby achieving the effect of partitioning the local area network 1 and the external power grid.

[0164] As shown in Figure 21bAs shown, in another specific example, the gateway device is the gateway device 10 with the network partition unit 2000. The transmission of the second signal between the external power grid and the local area network 1 needs to pass through the attenuation of two-stage network partition units. Specifically, if the second signal is superimposed in the power supply signal of the external power grid, the second signal and the power supply signal enter the network partition unit 200 together. The impedance regulator in the network partition unit 200 presents low impedance to the power supply signal, so that the power supply signal passes through smoothly, and presents a sudden increase in impedance to the second signal superimposed on the power supply signal, so that the second signal is greatly attenuated, so that the signal strength after passing through the network partition unit 200 is very weak, and the second signal attenuated by the network partition unit 200 is superimposed on the power supply signal, and then enters the gateway device 10 together. The network partition unit 2000 in the gateway device 10 presents almost no resistance to the power supply signal, and attenuates the second signal again, so that the second signal strength is attenuated again after passing through the network partition unit 2000, so as to be unable to be recognized / detected by the gateway unit 100-1, or be judged by the gateway as not belonging to the local area network. Similarly, the second signal for communication between the gateway unit 100 and the sub-devices (2011, 2012, …, 201N) connected thereto in the local area network 1 is almost completely blocked inside the local area network 1 due to the high impedance of the network partition unit 2000. Even if a small part passes through the network partition unit 2000, the signal strength of the second signal has been attenuated to very weak by the network partition unit 2000, and will be attenuated again by the network partition unit 200 before entering the external power grid, thereby protecting the data security inside the local area network 1. The two-stage network partition unit can better separate the local area network and the external power grid.

[0165] In some embodiments, the gateway device has multiple gateway devices, at least one of which is set as the above-mentioned gateway device, or at least one of which has the network partition unit between the external power grid.

[0166] As shown in Figure 22a , Figure 22b , an exemplary schematic diagram of two adjacent networks is given. One of the gateway devices 10 has a network partition unit 2000, and the other gateway device is a traditional gateway 1002. At least two network partition units 200, 2000 are included between the local area network 1 and the local area network 2, which can better separate the two adjacent local area networks.

[0167] As shown in Figure 22c , an exemplary schematic diagram of two adjacent networks is given. The gateway device 1 and the gateway device 2 can be a gateway device with a network partition unit or a traditional gateway. At least one network partition unit 200 is included between the local area network 1 and the local area network 2, which can separate the two adjacent local area networks.

[0168] In some embodiments, the gateway devices are multiple, each for establishing a corresponding local network, and each of the gateway devices is provided with the network segmentation unit between the corresponding local network and the external power grid, so that the second signal of the local network corresponding to a gateway device can be attenuated at least twice when entering the local network corresponding to another gateway device, thereby segmenting each local network and maintaining the independence between each local network.

[0169] As Figure 23 For the topology diagram of two adjacent local networks constructed in an embodiment, it can be seen that the network segmentation unit 200 is provided between the local network 1 and the external power grid, and between the local network 2 and the external power grid, wherein the gateway device 1 and the gateway device 2 can be gateway devices with network segmentation units or traditional gateways. The transmission of the second signal between the two networks needs to pass through at least two levels of network segmentation unit attenuation.

[0170] Specifically, when the gateway device 1 and the gateway device 2 are both traditional gateways, the second signal used for communication between the gateway device 2 and the sub-devices (2021, 2022, …, 202N) connected thereto in the local network 2 is transmitted from the gateway device 2 to the external power grid. When the second signal enters the network segmentation unit 200-2 along the power line as the target conductor, the impedance adjuster in the network segmentation unit 200-2 presents a sudden increase in impedance to the second signal superimposed on the target conductor, so that the second signal is almost completely blocked on the side of the gateway device 2 and cannot be output to the external power grid. The signal strength of the second signal transmitted to the external power grid has been attenuated to be very weak, which is superimposed on the power supply signal and enters the local network 1 along the power line. The impedance adjuster in the network segmentation unit 200-1 presents a sudden increase in impedance to the second signal of the local network 2 superimposed on the power supply signal, which has been attenuated by the network segmentation unit 200-2, so that the second signal is attenuated again, so that the signal strength after passing through the network segmentation unit 200-1 is very weak, so as to be unable to be recognized / detected by the gateway device 1 or be determined by the gateway as not belonging to the local network. Similarly, in the local network 1, the second signal used for communication between the gateway device 1 and the sub-devices (2011, 2012, …, 201N) connected thereto is blocked in the local network 1 due to the high impedance of the network segmentation unit 200-1. Even if a small part of the second signal passes through the network segmentation unit 200-1 to enter the external power grid, it is greatly attenuated and has very weak signal strength, and before entering the local network 2, it will be attenuated again by the network segmentation unit 200-2. In summary, the multi-level network segmentation unit can better divide two adjacent local networks and better protect the privacy of users and avoid data leakage.

[0171] When the gateway device 1 and / or the gateway device 2 is a gateway device with a network partition unit, the number of network partition units between the local area network 1 and the local area network 2 is increased, more levels of greater degree of attenuation are performed on the signals between the two networks, and the two adjacent local area networks are better partitioned.

[0172] Based on the control system provided in the technical solution, the adjacent networks can be partitioned, the data in the local area network is protected, the security of the data is ensured, and the communication bandwidth in the local area network is prevented from being occupied by external signals, and the data transmission speed is ensured.

[0173] In the description of the specification, the description of the terms "some embodiments", "a specific embodiment", "a specific implementation process", "an example", and the like means that the specific features, structures, materials, or characteristics described in combination with the embodiments or examples are included in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms corresponds to the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0174] In addition, it should be noted that each of the above embodiments can be combined with each other, and the same or similar concepts or processes can not be described in some embodiments, that is, the technical solutions disclosed in the later embodiments (recorded in the order of the text) should include the technical solutions recorded in this embodiment and the technical solutions in all the embodiments before this embodiment.

[0175] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A network partitioning unit, characterized by The network segmentation unit is adapted to be arranged at a power supply input end of a local area network to segment the local area network and other networks; The local area network is based on second signal communication, the second signal being a signal in a specific frequency range with information; If the second signal enters the network segmentation unit, the impedance of the network segmentation unit to the second signal suddenly increases, the network segmentation unit is configured to pass the first signal in a non-specific frequency range with low impedance to form a power supply path, and to pass the second signal with high impedance to adjust the ratio of the power of the second signal before and after passing through the network segmentation unit to above a limited threshold, so that the gateway unit can segment the local area network and other networks based on the power value of the received signal.

2. The network partitioning unit of claim 1, wherein, The segmented local area network and other networks include: After passing through the network segmentation unit, the second signal strength cannot be detected or recognized by the gateway unit; Alternatively, the second signal is judged by the gateway unit as not belonging to the local area network and cannot be communicated based on the second signal.

3. The network partitioning unit of claim 1, wherein, The second signal entering the network segmentation unit includes: The second signal enters from the external power grid direction, passes through the network segmentation unit and is output to the gateway unit; wherein, When the second signal enters the network segmentation unit from the external power grid direction and is output to the gateway unit direction, the ratio of the power of the second signal when the external power grid enters the network segmentation unit to the power of the second signal when it is output from the network segmentation unit to the gateway unit reaches above a limited threshold.

4. The network partitioning unit of claim 1, wherein, The second signal entering the network segmentation unit includes: The second signal enters from the gateway unit, passes through the network segmentation unit and is output to the external power grid direction; wherein, When the second signal enters the network segmentation unit from the gateway unit direction and is output to the external power grid direction, the ratio of the power of the second signal when the gateway unit enters the network segmentation unit to the power of the second signal when it is output from the network segmentation unit to the external power grid reaches above a limited threshold.

5. The network splitting unit according to any of claims 1-4, characterized by, The network segmentation unit has an impedance adjuster; The network segmentation unit sequentially connects a first inductor and a second inductor in the direction of approaching the input end of the network segmentation unit along the hot wire or the zero wire corresponding to the target wire to form the impedance adjuster, so that in the state that the gateway unit accesses the first signal through the network segmentation unit, based on the frequency selection characteristics of the first inductor and the second inductor, the impedance of the second signal in the specific frequency range passing through the network segmentation unit suddenly increases.

6. The network partitioning unit of claim 5, wherein, The inductance value of the inductor is [1uH-1mH], and the specific frequency range is set to 1MHz-12MHz, so that the power of the second signal after passing through the network segmentation unit is at least reduced to below -65db.

7. A gateway device having a network segmentation function, characterized by comprising: The gateway device includes: A gateway unit has a first feeder for accessing or discharging a target conductor, and is capable of establishing a local area network in a state that the target conductor is accessed by the first feeder; the local area network is based on second signal communication, the second signal being a signal in a specific frequency interval with information; wherein the gateway unit is configured to load the second signal to the target conductor for sending to a corresponding device in the local area network where the gateway unit is located; The gateway device is further provided with at least one network segmentation unit, which is capable of being electrically connected to the first feeder through the target conductor to be arranged between the gateway unit and an external power grid; wherein if the second signal enters the network segmentation unit, the impedance of the network segmentation unit to the second signal suddenly increases, the network segmentation unit is configured to pass the first signal in a non-specific frequency interval with low impedance to form a power supply path, and pass the second signal with high impedance to adjust the power ratio of the second signal before and after passing through the network segmentation unit to above a limited threshold, so that the gateway unit can segment the local area network and other networks based on the power value of the received signal.

8. A network partitioning method characterized by, Comprise: Access a network segmentation unit at the power supply input end of a local area network; the local area network is based on second signal communication, the second signal being a signal in a specific frequency interval with information; If the second signal enters the network segmentation unit, the impedance of the network segmentation unit to the second signal suddenly increases, the network segmentation unit is capable of passing the first signal in a non-specific frequency interval with low impedance to form a power supply path, and passing the second signal with high impedance to adjust the power ratio of the second signal before and after passing through the network segmentation unit to above a limited threshold, so that the gateway unit can segment the local area network and other networks based on the power value of the received signal.

9. The network partitioning unit of claim 8, wherein, The segmentation method further comprises: The second signal strength cannot be detected or recognized by the gateway unit; Or, the gateway unit judges that the second signal does not belong to the local area network and cannot be based on second signal communication.

10. The network partitioning unit of claim 8, wherein, If the second signal enters the network segmentation unit, comprising: The second signal enters from the direction of the external power grid, passes through the network segmentation unit and is output to the gateway unit; wherein, When the second signal enters the network segmentation unit from the direction of the external power grid and is output to the direction of the gateway unit, the ratio of the power of the second signal when the external power grid enters the network segmentation unit to the power of the second signal when it is output from the network segmentation unit to the gateway unit reaches above a limited threshold; The second signal enters from the direction of the gateway unit, passes through the network segmentation unit and is output to the direction of the external power grid; wherein, When the second signal enters the network segmentation unit from the direction of the gateway unit and is output to the direction of the external power grid, the ratio of the power of the second signal when the gateway unit enters the network segmentation unit to the power of the second signal when it is output from the network segmentation unit to the external power grid reaches above a limited threshold.

Images