CN118214455A

CN118214455A - Communication device, communication device control method and communication system

Info

Publication number: CN118214455A
Application number: CN202211617217.8A
Authority: CN
Inventors: 李伟光; 艾其江; 潘稻; 李亚奇
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-12-15
Filing date: 2022-12-15
Publication date: 2024-06-18
Also published as: WO2024125415A1

Abstract

The embodiment of the application discloses a communication device, a communication device control method and a communication system, relates to the technical field of communication, and can improve the data transmission rate during power line communication. The specific scheme is as follows: there is provided a communication device for use in a power line carrier communication system, the communication device comprising a first signal coupling terminal, a first circuit and a second circuit, the first terminal of the first circuit and the first terminal of the second circuit being coupled to the first signal coupling terminal, the second terminal of the first circuit and the second terminal of the second circuit being for coupling with any two of a hot wire, a neutral wire and a ground wire. The first circuit is used for transmitting a power signal, and the second circuit is used for transmitting a communication signal.

Description

Communication device, communication device control method and communication system

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a communication device, a communication device control method and a communication system.

Background

Power line communication (power line communication, PLC), also known as power line carrier (LINE CARRIER, PLC) communication, refers to a communication technology in which an analog signal or a digital signal is modulated on a power line by a carrier system for data transmission. The power line includes three types of conductors, namely a live wire (L), a neutral wire (naught wire, N) and a ground wire (protective earthing conductor, PE), and the power line carrier communication generally transmits differential signals with the same amplitude and opposite phases on two conductors in the power line through a differential transmission mode so as to transmit data. For example, the differential signals are modulated on the hot and neutral wires by a power line communication modem to transmit data, a mode in which data is transmitted using the hot and neutral wires is commonly referred to as a single-input single-output (SISO) mode.

However, the power line is not a line specifically designed for communication, and the presence of grid noise and electrical noise in the power line results in lower signal-to-noise ratio when power line communication is employed, and thus lower data transmission rate when communication is performed.

Disclosure of Invention

The embodiment of the application provides a communication device, a communication device control method and a communication system, which solve the problem of low data transmission rate during power line communication.

In order to achieve the above purpose, the embodiment of the application adopts the following technical scheme:

In a first aspect of the embodiment of the present application, a communication device is provided, where the communication device is applied to a power line carrier communication system, and the communication device includes a first signal coupling end, a first circuit and a second circuit, where the first end of the first circuit and the first end of the second circuit are coupled to the first signal coupling end, and the second end of the first circuit and the second end of the second circuit are used for coupling with any two of a live wire, a neutral wire and a ground wire. The first circuit is used for transmitting a power signal, and the second circuit is used for transmitting a communication signal.

Alternatively, the first circuit may be an inductor, and the embodiment of the present application is not limited to the specific structure of the first circuit.

Alternatively, the second circuit may be a capacitor, and the embodiment of the present application is not limited to the specific structure of the second circuit.

According to the communication device provided by the embodiment of the application, the characteristics of the first circuit for transmitting the power supply signal and the second circuit for transmitting the communication signal are utilized, and the switching of the transmission differential signal wires can be realized in a passive mode, so that the wires with smaller interference to the differential signal can be selected for transmitting the differential signal, the signal-to-noise ratio during power line communication can be improved, and the data transmission rate during power line communication can be improved.

With reference to the first aspect, in one possible implementation manner, when the first signal coupling end receives the communication signal, the second circuit is further configured to: the communication signal is received through the first end of the second circuit and transmitted through the second end of the second circuit. Or the second circuit is further configured to send the communication signal to the first signal coupling terminal through the first terminal of the second circuit when the second terminal of the second circuit receives the communication signal.

According to the communication device provided by the embodiment of the application, the communication signal is transmitted through the second circuit, so that the switching of the transmission differential signal wires can be realized by changing the connection relation between the second circuit and the power line, the wires with smaller interference to the differential signal can be selected to transmit the differential signal, the signal-to-noise ratio during the power line communication can be improved, and the data transmission rate during the power line communication can be improved.

With reference to the first aspect, in one possible implementation manner, the first circuit is further configured to block transmission of the communication signal, and the second circuit is further configured to block transmission of the power signal.

According to the communication device provided by the embodiment of the application, the characteristics that the first circuit transmits the power supply signal and prevents the transmission of the communication signal, and the second circuit transmits the communication signal and prevents the transmission of the power supply signal are utilized, and the switching of the wires for transmitting the differential signals can be realized in a passive mode, so that the wires with smaller interference to the differential signals can be selected to transmit the differential signals, the signal-to-noise ratio during power line communication can be improved, and the data transmission rate during power line communication can be improved.

With reference to the first aspect, in one possible implementation manner, the communication apparatus further includes: the transformer comprises a second signal coupling end, a first signal processing circuit, a transformer and a power circuit, wherein the second signal coupling end is used for being coupled with a live wire or a zero wire. The first differential signal end of the transformer is coupled with the first signal processing circuit, the second differential signal end of the transformer comprises a third end and a fourth end, the first input ends of the third end and the power supply circuit are both coupled with the second signal coupling end, and the second input ends of the fourth end and the power supply circuit are both coupled with the first signal coupling end.

According to the communication device provided by the embodiment of the application, the characteristics that the first circuit transmits the power supply signal to prevent transmission of the communication signal and the second circuit transmits the communication signal to prevent transmission of the power supply signal are utilized, so that the power supply circuit can acquire the power supply signal and meanwhile, the switching of the transmission differential signal wires is realized in a passive mode, the wires with smaller interference to the differential signal can be selected to transmit the differential signal, the signal-to-noise ratio in power line communication can be improved, and the data transmission rate in power line communication is improved.

With reference to the first aspect, in one possible implementation manner, the transformer includes: the first capacitor, the second capacitor, the first coil, and the second coil magnetically coupled to the first coil. The two ends of the first coil are coupled with a first differential signal end of the transformer, one end of the second coil is coupled with one end of the first capacitor, the other end of the first capacitor is coupled with the third end, the other end of the second coil is coupled with one end of the second capacitor, and the other end of the second capacitor is coupled with the fourth end.

With reference to the first aspect, in one possible implementation manner, the communication device further includes a second signal processing circuit, where a differential signal end of the second signal processing circuit includes a fifth end and a sixth end, where the fifth end is coupled to a common mode end of the first signal coupling end and the second signal coupling end, and the sixth end is coupled to the second end of the first circuit.

According to the communication device provided by the embodiment of the application, the second signal processing circuit is arranged, so that the communication device can communicate with other communication devices through the first signal processing circuit and the second signal processing circuit, and the communication mode can be called as a multiple-input multiple-output mode, so that the communication quality of the communication device can be improved.

With reference to the first aspect, in a possible implementation manner, the second coil includes a first sub-coil and a second sub-coil coupled in series, and the coupling ends of the first sub-coil and the second sub-coil are the common-mode ends, and the communication device further includes a transformer, where a first differential signal end of the transformer is coupled to the second signal processing circuit, and a second differential signal end of the transformer includes a seventh end and an eighth end, where the seventh end is coupled to the common-mode ends of the first signal coupling end and the second signal coupling end, and the eighth end is coupled to the second end of the first circuit.

Specifically, the transformer includes a third capacitor, a fourth capacitor, a third coil, and a fourth coil magnetically coupled to the third coil. The two ends of the third coil are coupled with the first differential signal end of the transformer, one end of the fourth coil is coupled with one end of the third capacitor, the other end of the third capacitor is coupled with the seventh end, the other end of the fourth coil is coupled with one end of the fourth capacitor, and the other end of the fourth capacitor is coupled with the eighth end.

A second aspect of the embodiments of the present application provides a method for controlling a communication device, where the method is applied to the communication device in the first aspect or any one of the possible implementation manners of the first aspect, and the method includes: the first circuit transmits a power signal and the second circuit transmits a communication signal.

With reference to the second aspect, in one possible implementation manner, the transmitting, by the second circuit, the communication signal includes: when the first signal coupling receives the communication signal, the second circuit receives the communication signal through the first end of the second circuit and transmits the communication signal through the second end of the second circuit. Or when the second end of the second circuit receives the communication signal, the second circuit sends the communication signal to the first signal coupling end through the first end of the second circuit.

With reference to the second aspect, in one possible implementation manner, the transmitting, by the first circuit, the power signal includes: the first circuit transmits a power signal and prevents transmission of a communication signal; the second circuit transmitting the communication signal further comprises: the second circuit transmits the communication signal and blocks transmission of the power signal.

In a third aspect of the embodiment of the present application, there is provided a communication apparatus including a third signal processing circuit, a power supply circuit, and a switching circuit, the switching circuit including: the signal coupling terminal circuit is provided with a plurality of pluggable signal coupling terminals, and each signal coupling terminal is used for being connected with one wiring terminal in a pluggable mode.

The power supply circuit comprises a power supply circuit, a third signal processing circuit, a ground wire connecting terminal, a power supply circuit and a signal coupling terminal circuit, wherein the power supply circuit comprises a power wire connecting terminal, a zero wire connecting terminal and a ground wire connecting terminal, the signal coupling terminals comprise a power wire signal coupling terminal, a zero wire signal coupling terminal and a ground wire signal coupling terminal, two input ends of the power supply circuit are respectively coupled with the power wire connecting terminal and the ground wire connecting terminal, and the third signal processing circuit is coupled with the signal coupling terminal circuit.

According to the communication device provided by the embodiment of the application, the wires for transmitting the differential signals can be switched by changing the coupling relation between the wiring terminal and the signal coupling terminal, so that the wires with smaller interference to the differential signals can be selected to transmit the differential signals, the signal-to-noise ratio during power line communication can be improved, and the data transmission rate during power line communication can be improved. Moreover, the user can realize switching through the plug signal coupling terminal and the binding post, and user operation is simple convenient to use, and user experience is better, can improve user satisfaction.

In a fourth aspect of embodiments of the present application, a power line carrier communication system is provided, the communication system including a plurality of communication devices coupled by a power line. Wherein the plurality of communication devices each comprise a communication apparatus as described in the first aspect or any one of the possible implementation manners of the first aspect, or the communication apparatus is a communication apparatus as described in the third aspect.

The description of the second and fourth aspects of the present application may refer to the detailed description of the first and third aspects; moreover, the advantages described in the second aspect and the fourth aspect may refer to the analysis of the advantages of the first aspect and the third aspect, and will not be described here again.

Drawings

Fig. 1 is a schematic diagram of a power line communication modem;

fig. 2 is a schematic flow chart of a power line communication control method;

fig. 3 is a schematic structural diagram of a communication device according to an embodiment of the present application;

Fig. 4 is a schematic structural diagram of another communication device according to an embodiment of the present application;

Fig. 5 is a schematic structural diagram of another communication device according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of still another communication device according to an embodiment of the present application;

fig. 7 is a flow chart of a control method of a communication device according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of still another communication device according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a power line carrier communication system according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of another power line carrier communication system according to an embodiment of the present application;

Fig. 11 is a schematic structural diagram of yet another power line carrier communication system according to an embodiment of the present application;

Fig. 12 is a schematic structural diagram of still another power line carrier communication system according to an embodiment of the present application.

Detailed Description

The making and using of the various embodiments are discussed in detail below. It should be appreciated that the numerous applicable inventive concepts provided by the present application may be embodied in a wide variety of specific contexts. The specific embodiments discussed are merely illustrative of specific ways to make and use the description and technology, and do not limit the scope of the application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art.

Each circuit or other component may be described or referred to as "for" performing one or more tasks. In this case, "for" is used to connote structure by indicating that circuitry/components includes structure (e.g., circuitry) that performs one or more tasks during operation. Thus, a given circuit/component may be said to be used to perform that task even when the circuit/component is not currently operational (e.g., not open). Circuits/components used with the term "for" include hardware, such as circuitry to perform operations, etc.

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. In the present application, "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a alone, a and B together, and B alone, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent: a, b, c, a and b, a and c, b and c or a, b and c, wherein a, b and c can be single or multiple. In addition, in the embodiments of the present application, the words "first", "second", and the like do not limit the number and order.

In the present application, the words "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

Before describing embodiments of the present application, technical terms and background related to the present application will be described first.

Grid noise: noise generated around the power line by the ac power in the power grid.

Electric appliance noise: noise from various appliances in the power grid, for example, noise generated when the ac relay in the power grid operates. The noise of the electric appliances is related to the quality and quantity of the electric appliances, and particularly, the more the electric appliances in a power grid are, the larger the noise of the electric appliances is due to the fact that the types of the electric appliances are various and the quality of the electric appliances are uneven.

Signal-to-noise ratio (SNR): signal to noise ratio in an electronic device or electronic system. Wherein, the signal refers to an electronic signal which is from the outside of the equipment and needs to be processed by the equipment, the noise refers to an irregular additional signal (or information) which does not exist in the original signal generated after the equipment passes through the equipment, and the signal does not change along with the change of the original signal.

Domain Master (DM): devices that communicate with the upstream parent route device, which may be referred to as domain management devices, other child route devices or slave route devices join the domain to form a star network, are typically configured in a domain management mode and establish domain information.

End node (EP): the other child routing devices or slave routing devices that join the domain described above may be referred to as end node devices.

Multiple-input multiple-output (MIMO): the communication mode is that a plurality of transmitting antennas and receiving antennas are respectively used at a transmitting end and a receiving end, so that signals are transmitted and received through the plurality of antennas at the transmitting end and the receiving end, and the communication quality is improved.

Power line communication is a communication technology in which an analog signal or a digital signal is modulated on a power line by a carrier system to perform data transmission. Before the transmitting end performs data transmission, firstly, a signal is generated according to the data, the signal is modulated by a modulation technology to generate a modulation signal, and then the modulation signal is transmitted on a power line. At the receiving end, the modulated signal is filtered and then demodulated to obtain the original data, thereby realizing the data transmission.

In particular, differential signals are typically modulated on the hot and neutral lines by a power line communication modem to transmit data, a mode of transmitting data using the hot and neutral lines in the power line, commonly referred to as a single-input single-output mode. However, since the power line is not a line specifically designed for communication, the presence of grid noise and appliance noise in the power line results in a lower signal-to-noise ratio when power line communication is employed, and thus a lower data transmission rate when communication is performed.

In order to increase the transmission rate at the time of power line communication, a scheme redesigns the structure of the power line communication modem.

As shown in fig. 1, a power line communication modem 100 is shown, and the power line communication modem 100 includes a differential signal processing circuit 101, a switch control circuit 102, a first switch 103, and a second switch 104. One end of the differential signal processing circuit 101 is coupled to a fixed end of the first switch 103, the other end of the differential signal processing circuit 101 is coupled to a fixed end of the second switch 104, three selection ends of the first switch 103 and three selection ends of the second switch 104 are respectively coupled to a live wire, a zero wire and a ground wire, and two ends of the switch control circuit 102 are respectively coupled to controlled ends of the first switch 103 and the second switch 104.

The differential signal processing circuit 101 is configured to process or generate a differential signal including a first signal and a second signal. The switch control circuit 102 is configured to control the first switch 103 and the second switch 104 to gate any two conductors among the live wire, the neutral wire, and the ground wire, so that the differential signal processing circuit 101 can transmit a differential signal through the two conductors.

For example, the switch control circuit 102 may control the first switch 103 to gate the fire line while controlling the second switch 104 to gate the zero line, so that the differential signal processing circuit 101 may transmit a first signal through the fire line while transmitting a second signal through the zero line, a mode of transmitting data using the fire line and the zero line, which is generally referred to as a single input single output mode.

For another example, the switch control circuit 102 may control the first switch 103 to gate the ground line and the second switch 104 to gate the neutral or fire line, so that the differential signal processing circuit 101 may transmit the first signal through the ground line and the second signal through the neutral or fire line, and a mode of transmitting data using the neutral or fire line and the ground line is generally referred to as a single-input single-output plus (siso+) mode.

It can be understood that, in the above power line communication modem 100, any two wires of the live wire, the neutral wire and the ground wire are gated by the first switch 103 and the second switch 104 through the switch control circuit 102, so that the wires for transmitting the differential signals can be switched, and the interference of different wires on the differential signals is different, so that the wires with less interference on the differential signals can be selected to transmit the differential signals through switching, the signal-to-noise ratio during power line communication can be improved, and the data transmission rate of the power line communication modem 100 can be improved.

As shown in fig. 2, based on the power line communication modem 100, there is also provided a power line communication control method for determining a wire transmitting a differential signal, the method including steps S201 to S203.

S201, the differential signal processing circuit 101 is turned on with the zero line, and the first signal is transmitted through the zero line and the path between the zero line and the differential signal processing circuit 101.

For example, the switch control circuit 102 may control the first switch 103 to gate the zero line to transmit the first signal through the zero line and the path between the zero line and the differential signal processing circuit 101. It will be appreciated that the path between the neutral line and the differential signal processing circuit 101 includes a first switch 103.

S202, the differential signal processing circuit 101 is turned on with the fire wire, and the second signal is transmitted through the fire wire and the path between the fire wire and the differential signal processing circuit 101.

For example, the switch control circuit 102 may control the second switch 104 to gate the fire line to transmit the second signal through the fire line and the path between the fire line and the differential signal processing circuit 101. It will be appreciated that the path between the hot and the differential signal processing circuit 101 includes a second switch 104, in which case the differential signal processing circuit 101 may be coupled to the neutral via the first switch 103 and simultaneously coupled to the hot via the second switch 104, so that the differential signal processing circuit may employ a single input single output mode to transmit differential signals via the neutral and hot.

S203, cutting off the path between the differential signal processing circuit 101 and the zero line, and conducting the differential signal processing circuit 101 and the ground line, and transmitting the first signal through the ground line and the path between the ground line and the differential signal processing circuit 101 when the transmission rate of the ground line is greater than or equal to the preset transmission rate threshold.

For example, the switch control circuit 102 may control the first switch 103 to gate the ground line, cutting off the path between the differential signal processing circuit 101 and the neutral line, so that the differential signal processing circuit 101 may transmit the differential signal through the ground line and the live line in the single-input single-output plus mode. Further, when the transmission rate of the ground line is greater than or equal to the preset transmission rate threshold, the first signal may be transmitted through the ground line and the path between the ground line and the differential signal processing circuit 101, and it may be determined that the differential signal processing circuit 101 transmits the differential signal in the single-input single-output plus mode.

It will be appreciated that by performing steps S201-S203 described above, conductors for transmitting differential signals may be determined, and by selecting conductors that have less interference with differential signals to transmit differential signals, the signal-to-noise ratio during power line communications may be improved, and the data transmission rate of the power line communications modem 100 may be increased.

However, the above-mentioned power line communication modem 100 requires the switch control circuit 102 to control the first switch 103 and the second switch 104 to switch the wires for transmitting the differential signals, and a user needs to learn how to switch the wires for transmitting the differential signals through the switch control circuit 102 or please a professional technician to operate to switch the wires for transmitting the differential signals during the process of using the power line communication modem 100, which increases the use cost of the user and results in poor user experience.

In order to solve the problem that the power line communication modem 100 is inconvenient for users to use and has poor experience, the embodiment of the application provides a communication device which is applied to a power line carrier communication system and can switch wires for transmitting differential signals so as to improve the data transmission rate during power line communication. The communication device provided by the embodiment of the application can also be used for wired communication systems such as network cables, twisted pair wires, direct current power supply cables and the like to improve the data transmission rate of the communication system, and the wired communication system of the specific application of the communication device is not limited.

Fig. 3 is a schematic structural diagram of a communication device 300 according to an embodiment of the present application. The communication device 300 includes a first signal coupling terminal, a first circuit 310 and a second circuit 320, the first terminal of the first circuit 310 and the first terminal of the second circuit 320 being coupled to the first signal coupling terminal, the second terminal of the first circuit 310 and the second terminal of the second circuit 320 being for coupling with any two of a hot wire, a neutral wire and a ground wire.

Wherein the first circuit 310 is used for transmitting a power signal and the second circuit 320 is used for transmitting a communication signal.

Optionally, when the first signal coupling receives the communication signal, the second circuit 320 is configured to receive the communication signal through the first end of the second circuit 320 and transmit the communication signal through the second end of the second circuit 320. Or when the second end of the second circuit 320 receives the communication signal, the second circuit 320 is further configured to send the communication signal to the first signal coupling end through the first end of the second circuit 320.

In one possible embodiment, the first circuit 310 is further configured to block transmission of communication signals, and the second circuit 320 is further configured to block transmission of power signals.

For example, as shown in (a) of fig. 4, the power line carrier communication system includes a communication device 400, a first end of the communication device 400 is coupled to a power line, a second end is coupled to a neutral line, power supply signals are obtained through the power line and the neutral line, and differential signals including a first communication signal and a second communication signal are transmitted as an example. As shown in fig. 4 (b), the user may couple a first signal coupling terminal in the communication apparatus 300 with a second terminal of the communication device 400, couple a second terminal of the first circuit 310 with a neutral line, and couple a second terminal of the second circuit 320 with a ground line, thereby switching conductors for transmitting differential signals, and the communication device 400 may continue to acquire a power supply signal.

Specifically, when the communication device 400 transmits the differential signal, the first communication signal may be transmitted through the hot wire, the first signal coupling end may receive the second communication signal, the second circuit 320 may receive the second communication signal through the first end of the second circuit 320, and transmit the second communication signal to the ground wire through the second end of the second circuit 320, so that the communication device 400 may transmit the differential signal through the hot wire and the ground wire, while the communication device 400 may continuously acquire the power signal from the hot wire and the neutral wire through the first circuit 310. When the communication device 400 receives the differential signal, the first communication signal may be received through the hot wire, the second end of the second circuit 320 may receive the second communication signal, and the second communication signal may be transmitted to the first signal coupling end through the first end of the second circuit 320, so that the communication device 400 may obtain the differential signal transmitted in the hot wire and the ground wire, while the communication device 400 may continue to obtain the power signal from the hot wire and the neutral wire through the first circuit 310.

It can be appreciated that, by connecting the communication apparatus provided by the embodiment of the present application between the communication device and the power line, the user can switch the communication device 400 to transmit differential signals through the live wire and the neutral wire, and transmit differential signals through the live wire and the ground wire, and at the same time, the communication device can continuously acquire power signals through the live wire and the neutral wire.

Alternatively, the first circuit 310 may be an inductor, and the specific structure of the first circuit 310 is not limited in the embodiments of the present application, and the following embodiments are exemplified by taking the first circuit 310 as the inductor L0.

Alternatively, the second circuit 320 may be a capacitor, and the specific structure of the second circuit 320 according to the embodiments of the present application is not limited, and the following embodiments are exemplified by taking the second circuit 320 as the capacitor C0.

According to the communication device 300 provided by the embodiment of the application, the characteristics of the first circuit 310 for transmitting the power supply signal and the second circuit 320 for transmitting the communication signal are utilized, and the switching of the wires for transmitting the differential signals can be realized in a passive mode, so that the wires with smaller interference to the differential signals can be selected for transmitting the differential signals, the signal-to-noise ratio during power line communication can be improved, and the data transmission rate during power line communication can be improved. Meanwhile, the user can realize the switching of the transmission differential signal wires by connecting the communication device 300 between the communication equipment and the power line, the operation of the user is simple, the use is convenient, the user experience is good, and the user satisfaction can be improved.

In one possible embodiment, as shown in fig. 5, the communication device 300 further includes a second signal coupling terminal, a first signal processing circuit 330, a transformer 340, and a power circuit 350, where the second signal coupling terminal is configured to couple with a hot or neutral line.

The first differential signal terminal of the transformer 340 is coupled to the first signal processing circuit 330, the second differential signal terminal of the transformer 340 includes a third terminal and a fourth terminal, the third terminal and the first input terminal of the power circuit 350 are both coupled to the second signal coupling terminal, and the fourth terminal and the second input terminal of the power circuit 350 are both coupled to the first signal coupling terminal.

Optionally, the second signal terminal is specifically configured to be coupled to a live or neutral wire, and is related to a coupling manner of the second terminal of the first circuit 310 and the second terminal of the second circuit 320 to the live, neutral and ground wires. The second signal terminal is for coupling to the neutral when the second terminal of the first circuit 310 and the second terminal of the second circuit 320 are for coupling to the neutral and ground. Or the second signal terminal is used to couple with the hot wire when the second terminal of the first circuit 310 and the second terminal of the second circuit 320 are used to couple with the neutral and ground. The embodiment of the application is not limited to the fact that the second signal coupling terminal is specifically used for coupling with a live wire or a zero wire.

For example, as shown in fig. 5, the second end of the first circuit 310 is coupled to the live wire, and the second end of the second circuit 320 is coupled to the ground wire, where the second signal coupling end is used for coupling to the neutral wire. It can be appreciated that, in the communication device 300 provided in the embodiment of the present application, the wires for transmitting the differential signals can be switched to the zero line and the ground line through the first circuit 310 and the second circuit 320, and meanwhile, the power circuit 350 can obtain the power signal through the live line and the zero line.

In one possible embodiment, as shown in fig. 5, the transformer 340 includes: a first capacitor C1, a second capacitor C2, a first coil L1, and a second coil L2 magnetically coupled to the first coil L1. The two ends of the first coil L1 are coupled to the first differential signal end of the transformer 340, one end of the second coil L2 is coupled to one end of the first capacitor C1, the other end of the first capacitor C1 is coupled to the third end, the other end of the second coil L2 is coupled to one end of the second capacitor C2, and the other end of the second capacitor C2 is coupled to the fourth end.

In a possible embodiment, the first signal coupling end and the second signal coupling end are connected with the power circuit 350 and the transformer 340 in a pluggable manner, so that a user can switch the wires used when the communication device 300 transmits the differential signal by changing the connection relationship between the first signal coupling end and the second signal coupling end, can select the wires with smaller interference to the differential signal to transmit the differential signal, can improve the signal-to-noise ratio when in power line communication, and can switch in a pluggable manner.

According to the communication device 300 provided by the embodiment of the application, the characteristics that the first circuit 310 transmits the power supply signal to prevent the transmission of the communication signal and the second circuit 320 transmits the communication signal to prevent the transmission of the power supply signal are utilized, so that the power supply circuit 350 can acquire the power supply signal and meanwhile, the switching of the transmission differential signal wires is realized in a passive mode, so that the wires with smaller interference to the differential signal can be selected to transmit the differential signal, the signal-to-noise ratio during power line communication can be improved, and the data transmission rate during power line communication can be improved.

In one possible embodiment, as shown in fig. 6, the communication device 300 further includes a second signal processing circuit 360, the differential signal terminals of the second signal processing circuit 360 include a fifth terminal and a sixth terminal, the fifth terminal is coupled to the common mode terminal of the first signal coupling terminal and the second signal coupling terminal, and the sixth terminal is coupled to the second terminal of the first circuit 310.

In one possible embodiment, as shown in fig. 6, the second coil L2 includes a first sub-coil L21 and a second sub-coil L22 coupled in series, the coupling ends of the first sub-coil L21 and the second sub-coil L22 are the common mode ends, the communication device 300 further includes a transformer 370, a first differential signal end of the transformer 370 is coupled to the second signal processing circuit 360, a second differential signal end of the transformer 370 includes a seventh end and an eighth end, the seventh end is coupled to the common mode ends of the first signal coupling end and the second signal coupling end, and the eighth end is coupled to the second end of the first circuit 310.

Specifically, the transformer 370 includes a third capacitor C3, a fourth capacitor C4, a third coil L3, and a fourth coil L4 magnetically coupled to the third coil L3. Both ends of the third coil L3 are coupled to the first differential signal terminal of the transformer 370, one end of the fourth coil L4 is coupled to one end of the third capacitor C3, the other end of the third capacitor C3 is coupled to the seventh terminal, the other end of the fourth coil L4 is coupled to one end of the fourth capacitor C4, and the other end of the fourth capacitor C4 is coupled to the eighth terminal.

In the communication device 300 provided in the embodiment of the present application, the second signal processing circuit 360 is provided, so that the communication device 300 can communicate with other communication devices through the first signal processing circuit 330 and the second signal processing circuit 360, and the communication mode may be referred to as a multiple-input multiple-output mode, so that the communication quality of the communication device 300 can be improved.

As shown in fig. 7, the embodiment of the present application further provides a communication device control method, which may be applied to the above-mentioned communication device 300, and the communication device control method includes steps S701 to S702.

S701, the first circuit 310 transmits a power signal.

Alternatively, the first circuit 310 may be an inductor, and the embodiment of the present application is not limited to the specific structure of the first circuit 310.

Optionally, the transmitting the power signal by the first circuit 310 includes: the first circuit 310 transmits the power signal and blocks transmission of the communication signal.

S702, the second circuit 320 transmits a communication signal.

Wherein the second circuit 320 transmits the communication signal includes: when the first signal coupling receives the communication signal, the second circuit 320 receives the communication signal through the first end of the second circuit 320 and transmits the communication signal through the second end of the second circuit 320. Or when the second end of the second circuit 320 receives the communication signal, the second circuit 320 transmits the communication signal to the first signal coupling end through the first end of the second circuit 320.

Optionally, the transmitting the communication signal by the second circuit 320 further includes: the second circuit 320 transmits the communication signal and blocks transmission of the power signal.

Alternatively, the second circuit 320 may be a capacitor, and the embodiment of the present application is not limited to the specific structure of the second circuit 320.

The description of the communication device 300 shown in fig. 3 to 6 provided above can be introduce the foreign aid to the control method of the communication device, and the embodiments of the present application are not repeated here.

According to the communication device control method provided by the embodiment of the application, the first circuit 310 is used for transmitting the power supply signal to prevent the transmission of the communication signal, the second circuit 320 is used for transmitting the communication signal to prevent the transmission of the power supply signal, and the switching of the wires for transmitting the differential signals can be realized in a passive mode, so that the wires with smaller interference to the differential signals can be selected to transmit the differential signals, the signal-to-noise ratio during power line communication can be improved, and the data transmission rate during power line communication can be improved.

As shown in (a) of fig. 8, an embodiment of the present application also provides a communication apparatus 800, the communication apparatus 800 including a third signal processing circuit 810, a power supply circuit 820, and a switching circuit 830, the switching circuit 830 including: a plurality of connection terminals 831 and a signal coupling terminal circuit 832, the signal coupling terminal circuit 832 having a plurality of signal coupling terminals which are pluggable, each for pluggable connection with one connection terminal.

Wherein, a plurality of binding posts include live wire binding post, zero line binding post and ground wire binding post, and a plurality of signal coupling terminals include live wire signal coupling terminal, zero line signal coupling terminal and ground wire signal coupling terminal, and two inputs of power supply circuit 820 couple with live wire binding post and ground wire binding post respectively, and third signal processing circuit 810 couples with signal coupling terminal circuit 832.

For example, as shown in (a) of fig. 8, the live signal coupling terminal may be coupled with the live wire connection terminal, the neutral signal coupling terminal may be coupled with the neutral connection terminal, the ground signal coupling terminal may be coupled with the ground connection terminal, and as shown in (b) of fig. 8, the user may couple the live signal coupling terminal with the ground connection terminal, and the ground signal coupling terminal with the live wire connection terminal, thereby switching the conductors for transmitting differential signals.

According to the communication device 800 provided by the embodiment of the application, the wires for transmitting the differential signals can be switched by changing the coupling relation between the wiring terminal and the signal coupling terminal, so that the wires with smaller interference to the differential signals can be selected to transmit the differential signals, the signal-to-noise ratio during power line communication can be improved, and the data transmission rate during power line communication can be improved. Moreover, the user can realize switching through the plug signal coupling terminal and the binding post, and user operation is simple convenient to use, and user experience is better, can improve user satisfaction.

Based on this, as shown in fig. 9, the embodiment of the present application further provides a power line carrier communication system 900, the power line carrier communication system 900 including a plurality of communication devices coupled by a power line.

The plurality of communication apparatuses each include a communication device having a structure of any one of the communication devices 300 shown in fig. 3 to 6 or the communication device 800 shown in fig. 8, which is not limited to the embodiment of the present application.

In one possible embodiment, as shown in fig. 10, the plurality of communication devices includes a first communication device 910 and at least one second communication device 920, where each of the first communication device 910 and the at least one second communication device 920 includes the communication apparatus 300 shown in fig. 5, and the following embodiments of the present application are exemplified by the plurality of communication devices including the first communication device 910 and the one second communication device 920.

Alternatively, the first communication device 910 may be a domain management device, and the at least one second communication device 920 may be an end node device, thereby forming a star network.

In a possible embodiment, as shown in fig. 11, the first communication device 910 and the second communication device 920 each include the communication apparatus 300 shown in fig. 6, so that the first communication device 910 and the second communication device 920 can each communicate with other communication apparatuses through the first signal processing circuit 330 and the second signal processing circuit 360, and can improve the communication quality of the first communication device 910 and the second communication device 920.

In a possible embodiment, as shown in fig. 12, the first communication device 910 includes the communication apparatus 300 shown in fig. 6, the second communication device 920 includes the communication apparatus 800 shown in fig. 8, and a user can implement switching between wires for transmitting differential signals by plugging in and unplugging a signal coupling terminal and a connection terminal in the second communication device 920.

In one possible embodiment, as shown in fig. 10, 11 or 12, each of the first communication device 910 and the second communication device 920 further includes a plug 930, where the plug 930 is used for pluggable connection with a socket, so that the first communication device 910 and the second communication device 920 may be coupled with a power line through the plug, and the first communication device 910 and the second communication device may acquire a power signal while transmitting a differential signal through the power line.

The descriptions provided above for the communication device 300 shown in fig. 3 to 6 and the descriptions provided above for the communication device 800 shown in fig. 8 can be all introduce the foreign aid applied to the power line carrier communication system 900, and the embodiments of the present application are not repeated here.

In the power line carrier communication system 900 provided by the embodiment of the present application, by adopting the communication device 300 or the communication device 800 provided by the embodiment of the present application, switching of transmission differential signal wires can be achieved in a passive manner, so that wires with less interference to differential signals can be selected to transmit differential signals, the signal-to-noise ratio during power line communication can be improved, and the data transmission rate during power line communication can be improved. Meanwhile, the operation of the user is simple, the use is convenient, the user experience is good, and the user satisfaction can be improved.

The foregoing is merely illustrative of specific embodiments of the present application, and the scope of the present application is not limited thereto, but any changes or substitutions within the technical scope of the present application should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A communication device, wherein the communication device is applied to a power line carrier communication system, and the communication device comprises a first signal coupling end, a first circuit and a second circuit, wherein the first end of the first circuit and the first end of the second circuit are coupled to the first signal coupling end, and the second end of the first circuit and the second end of the second circuit are used for coupling any two of a live wire, a null wire and a ground wire;

The first circuit is used for transmitting a power supply signal;

The second circuit is used for transmitting communication signals.

2. The communication device of claim 1, wherein when the first signal coupling receives the communication signal, the second circuit is further configured to: receiving the communication signal through a first end of the second circuit and transmitting the communication signal through a second end of the second circuit; or alternatively

The second circuit is further configured to send the communication signal to the first signal coupling end through the first end of the second circuit when the second end of the second circuit receives the communication signal.

3. The communication device according to claim 1 or 2, wherein the first circuit is further configured to block transmission of the communication signal, and the second circuit is further configured to block transmission of the power signal.

4. A communication device according to any of claims 1-3, characterized in that the communication device further comprises: the second signal coupling end is used for being coupled with the live wire or the zero wire;

The first differential signal end of the transformer is coupled with the first signal processing circuit, the second differential signal end of the transformer comprises a third end and a fourth end, the third end and the first input end of the power supply circuit are both coupled with the second signal coupling end, and the fourth end and the second input end of the power supply circuit are both coupled with the first signal coupling end.

5. The communication device of claim 4, further comprising a second signal processing circuit, the differential signal terminals of the second signal processing circuit including a fifth terminal coupled to a common mode terminal of the first signal coupling terminal and the second signal coupling terminal and a sixth terminal coupled to a second terminal of the first circuit.

6. A method of controlling a communication device, the method being applied to a communication device, the communication device comprising a first circuit and a second circuit, a first end of the first circuit and a first end of the second circuit being coupled to a first signal coupling end, a second end of the first circuit and a second end of the second circuit being for coupling with any two of a hot wire, a neutral wire and a ground wire; the method comprises the following steps:

the first circuit transmits a power signal;

the second circuit transmits a communication signal.

7. The method of claim 6, wherein the second circuit transmitting the communication signal comprises:

When the first signal coupling receives the communication signal, the second circuit receives the communication signal through a first end of the second circuit and transmits the communication signal through a second end of the second circuit; or alternatively

When the second end of the second circuit receives the communication signal, the second circuit sends the communication signal to the first signal coupling end through the first end of the second circuit.

8. The method of claim 7, wherein the first circuit transmitting a power signal comprises: the first circuit transmitting the power signal and preventing transmission of the communication signal; the second circuit transmitting a communication signal further comprises: the second circuit transmits the communication signal and blocks transmission of the power signal.

9. A power line carrier communication system, the communication system comprising a plurality of communication devices coupled by a power line;

Wherein each of the plurality of communication devices comprises a communication apparatus as claimed in any one of claims 1 to 5.