Communication devices and communication control methods, communication systems

Abstract

This application provides a communication device, communication control method, and communication system, relating to the field of communication technology, for improving the transmission rate between nodes. The communication device includes one or more channel groups. Each channel group includes a first coupler, multiple first channels, and multiple second couplers. The first coupler includes a first end and multiple second ends; one end of each of the multiple first channels is coupled to one of the multiple second ends, and the other end of each of the multiple first channels is coupled to one of the multiple second couplers; each first channel includes a first branch and a second branch, with the impedance of the first branch being greater than the impedance of the second branch; the first channel is used to select whether to transmit the communication signal transmitted by the communication device via the first branch or via the second branch. This ensures that the first channel signal connected to the source node or destination node flows through the low-impedance branch, while the first channel signal not connected to the source node or destination node flows through the high-impedance branch.

Description

Technical Field

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

[0002] ITU-T G.hn technology is a point-to-multipoint (P2MP) wired communication technology used over various media such as power lines, twisted pairs, coaxial cables, and plastic optical fibers. It uses orthogonal frequency division multiplexing (OFDM) technology to modulate signals onto the wired medium for transmission. Other wired P2MP technologies include power line communication (PLC) technologies such as Homeplug, and coaxial cable-based technologies such as MOCA (Multimedia Over Coax Alliance).

[0003] Ethernet (IEEE 802.3) also defines various communication technologies based on various media, including twisted-pair media. Commonly used media for Ethernet technology include Category 5, Category 5e, and Category 6 twisted-pair cables. Ethernet technology is primarily used for point-to-point communication, but it has also supported point-to-multipoint communication using carrier-sense multiple access with collision detection (CSMA / CD).

[0004] A typical point-to-multipoint communication system includes a master node and slave nodes, generally consisting of one master node and multiple slave nodes. The master node typically establishes domain information on the device connected to the upstream parent route. Other child routes or slave routes join the established domain information as slave nodes, forming a network.

[0005] In typical point-to-multipoint wired communication, the connection between the master and slave nodes is established directly via cables. Therefore, the transmission rate between nodes is a crucial factor affecting communication performance. Summary of the Invention

[0006] This application provides a communication device, communication control method, and communication system to improve the transmission rate between nodes.

[0007] To achieve the above objectives, this application adopts the following technical solution:

[0008] A first aspect of this application provides a communication device applicable to a wired communication system. For example, the communication device is applied to a point-to-multipoint communication system. The communication device includes one or more channel groups. Each channel group includes a first coupler, multiple first channels, and multiple second couplers. Each first coupler includes a first end and multiple second ends; one end of each of the multiple first channels is coupled to one of the multiple second ends, and the other end of each of the multiple first channels is coupled to one of the multiple second couplers; each first channel includes a first branch and a second branch, the impedance of the first branch being greater than the impedance of the second branch; the first channel is used to select whether to transmit the communication signal transmitted by the communication device via the first branch or via the second branch.

[0009] The communication device provided in this application embodiment includes a first channel comprising a first branch and a second branch with different impedances, and the first channel has the function of selecting whether the communication signal flows through the first branch or the second branch. Therefore, some (one or more) of the first channels can choose to transmit the communication signal through the first branch, and some (one or more) of the first channels can choose to transmit the communication signal through the second branch. Since the impedance of the first branch is greater than that of the second branch, the first channel receiving the communication signal through the first branch receives a smaller signal power, while the first channel receiving the communication signal through the second branch receives a larger signal power. This ensures that not all first channels receive equal signal power; first channels not connected to the source or destination node can receive less signal power, while first channels connected to the source or destination node receive more signal power, thereby increasing the transmission rate of the first channel connected to the source or destination node, and thus increasing the transmission rate between the two nodes coupled to both ends of the first channel. Furthermore, each first channel can dynamically switch between transmitting the communication signal through the first or second branch according to the application scenario, achieving dynamic allocation of signal power. Therefore, at any given moment, the first channel connecting the source node or the destination node can choose to have the communication signal flow through the second branch to obtain a larger signal power, so that the first channel connecting the source node or the destination node can have a faster transmission rate at any given moment.

[0010] In one possible implementation, the inductive reactance of the first branch is greater than that of the second branch. Since inductors or ferrite beads have the characteristic of passing low frequencies and blocking high frequencies, the first branch is made to have a larger impedance by setting a larger inductive reactance. When the impedance of the first branch is greater than that of the second branch, this method allows low-frequency signals in the communication signal to be transmitted through the first branch, which is convenient for communication equipment to listen to and obtain the communication status of the first channel.

[0011] In one possible implementation, the resistance of the first branch is greater than the resistance of the second branch. This results in a simpler and lower-cost structure for the first channel.

[0012] In one possible implementation, the capacitive reactance of the first branch is greater than that of the second branch. This results in a simpler and lower-cost structure for the first channel.

[0013] In one possible implementation, the first branch includes a first passive circuit; the second branch includes a second passive circuit; the first channel further includes a first switching circuit; the first and second passive circuits are connected in parallel and in series with the first switching circuit; the impedance of the first passive circuit is greater than the impedance of the second passive circuit; the first switching circuit is used to select the connection between the first passive circuit and the second coupler according to a first control signal, or to select the connection between the second passive circuit and the second coupler according to the first control signal. By setting passive circuits on the first and second branches to adjust the impedance of the first and second branches, the structure is simple and easy to implement.

[0014] In one possible implementation, the first branch includes a first passive circuit; the second branch includes a second passive circuit; the first channel further includes a first switching circuit; the first and second passive circuits are connected in parallel and in series with the first switching circuit; the impedance of the first passive circuit is greater than the impedance of the second passive circuit; or, the inductive reactance of the first passive circuit is greater than the inductive reactance of the second passive circuit; the first switching circuit is used to select the connection between the first passive circuit and the second coupler according to a first control signal, or to select the connection between the second passive circuit and the second coupler according to the first control signal. By setting passive circuits on the first and second branches to adjust the impedance of the first and second branches, the structure is simple and easy to implement.

[0015] In one possible implementation, the communication device further includes a controller for outputting a first control signal.

[0016] In one possible implementation, the first passive circuit includes at least one of a resistor, capacitor, inductor, or ferrite bead. This is a structurally simple implementation.

[0017] In one possible implementation, the second passive circuit includes signal lines. This is a structurally simple implementation.

[0018] In one possible implementation, the channel group further includes a second channel, which includes a third coupler; the third coupler is coupled to the first end. By incorporating the third coupler in the communication device, the device not only has the ability to transmit signals from the first coupler side to the second coupler side, but also from the second coupler side to the first coupler side. That is, the communication device has bidirectional transmission capability. Moreover, since the first channel includes a first branch and a second branch with different impedances, by adjusting the flow path of the communication signal, the first channel connected to the source node or destination node can have a lower impedance, while the first channel not connected to the source node or destination node can have a higher impedance. In this way, when the communication device transmits bidirectionally, the signal power in the communication path is always maximized, thereby increasing the transmission rate.

[0019] In one possible implementation, the second channel further includes a third passive circuit, a fourth passive circuit, and a second switching circuit; the third and fourth passive circuits are connected in parallel and coupled in series with the second switching circuit between the third coupler and the first terminal; the impedance of the third passive circuit is greater than the impedance of the fourth passive circuit; or, the inductive reactance of the third passive circuit is greater than the inductive reactance of the fourth passive circuit; the second switching circuit is used to select the connection between the third passive circuit and the first terminal according to the second control signal, or to select the connection between the fourth passive circuit and the first terminal according to the second control signal. By setting the third coupler, the third passive circuit, the fourth passive circuit, and the second selection circuit in the communication device, the communication device has the ability to transmit signals from the first coupler side to the second coupler side, the ability to transmit signals from the second coupler side to the first coupler side, and the energy to transmit signals from one second coupler side to another. Furthermore, the first channel includes a first branch and a second branch with different impedances. By adjusting the flow path of the communication signal, the first channel connected to the source node or destination node can have a lower impedance, while the first channel not connected to the source node or destination node can have a higher impedance. The second channel includes a third passive circuit and a fourth passive circuit with different impedances. By adjusting the flow path of the communication signal, the second channel can have a lower impedance when the communication signal flows through the third coupler, and a higher impedance when the communication signal does not flow through the third coupler. In this way, when the communication device is communicating, the communication loop is always a normal loop, and the other branches are always high-impedance loops, ensuring that the signal power in the communication path is always maximized, thereby improving the transmission rate.

[0020] In one possible implementation, the first coupler further includes a third terminal; the third terminal is coupled in series with a fifth passive circuit. This is one possible transmission method.

[0021] In one possible implementation, the communication device includes two parallel channel groups. This makes the communication device suitable not only for single-input single-output data transmission modes but also for multiple-input multiple-output data transmission modes, thus offering a wide range of applications.

[0022] In one possible implementation, the communication device is integrated into the end node (EP) device, the tail node (STA) device, the domain administrator (DM) device, or the central coordinator (CCO) device. This simplifies the architecture of the communication system.

[0023] A second aspect of this application provides a communication device including a channel group; the channel group includes a first coupler, a third channel, a fourth channel, and a plurality of second couplers; the first coupler includes a first end and a plurality of second ends; the third channel is coupled between the second end and the second coupler; the fourth channel is coupled between the second end and the second coupler; the second end and the second coupler coupled to the third channel are different from those coupled to the fourth channel; the impedance of the third channel is greater than the impedance of the fourth channel. The communication device provided in this application includes a third channel and a fourth channel, but the impedances of the third channel and the fourth channel are not equal, therefore, the signal power allocated to the third channel and the fourth channel is also not equal. With a fixed transmit power, the signal power allocated to the fourth channel, which has a smaller impedance, is greater than the signal power allocated to the third channel, which has a larger impedance, thus achieving a fixed signal power allocation. This improves the signal transmission rate on the fourth channel.

[0024] In one possible implementation, the channel includes a sixth passive circuit, and the fourth channel includes a signal line; the impedance of the sixth passive circuit is greater than the impedance of the signal line, or the inductive reactance of the sixth passive circuit is greater than the inductive reactance of the signal line. This is a structurally simple implementation.

[0025] In one possible implementation, the channel group further includes a third coupler; the third coupler is coupled to the first end. By incorporating the third coupler in the communication device, the communication device not only has the ability to transmit signals from the first coupler side to the second coupler side, but also the ability to transmit signals from the second coupler side to the first coupler side. That is, the communication device has bidirectional transmission capability.

[0026] A third aspect of the embodiments of this application provides a communication system, the communication system including a first device and a plurality of second devices, the plurality of second devices being coupled to the first device via a first cable; the first device includes a communication device, the communication device being a communication device as described in either the first aspect or the second aspect.

[0027] The communication system provided in this application includes a communication device of the first aspect or the second aspect, and its beneficial effects are the same as those of the communication device, which will not be repeated here.

[0028] In one possible implementation, the communication system also includes a third device, which is coupled to the first device via a second cable.

[0029] In one possible implementation, the communication device includes two parallel channel groups; the second device is coupled to the first device via two first cables.

[0030] A fourth aspect of this application provides a communication control method applied in a communication device, the communication device including any of the communication devices in the first aspect; the communication control method includes: communication signals transmitted and received by the communication device are transmitted via a first channel; the first channel not used to connect the source node and the destination node is selected to transmit the communication signals via a first branch; the first channel used to connect the source node and the destination node is selected to transmit the communication signals via a second branch.

[0031] The communication control method provided in this application embodiment is applied to the communication device of the first aspect, and its beneficial effects are the same as those of the communication device, which will not be repeated here.

[0032] In one possible implementation, the communication control method further includes: transmitting the communication signal via a second channel; the second channel selecting the communication signal to be transmitted via a third passive circuit according to a second control signal, or selecting the communication signal to be transmitted via a fourth passive circuit according to the second control signal.

[0033] In one possible implementation, when the second channel is used to connect a source node or a destination node, the controller sends a second control signal to the second channel to control the second switching circuit to select the communication signal for transmission via a fourth passive circuit; when the second channel is not used to connect a source node or a destination node, the controller sends a second control signal to the second channel to control the second switching circuit to select the communication signal for transmission via a third passive circuit.

[0034] In one possible implementation, the communication control method further includes: a first coupler receiving a communication signal sent by a source node; one of a plurality of second couplers outputting a communication signal to a destination node; and acquiring a first channel for connecting to the destination node.

[0035] In one possible implementation, the communication control method further includes: one of a plurality of second couplers receiving a communication signal sent by the source node; the first coupler outputting a communication signal to the destination node; and the controller acquiring a first channel for connecting to the source node.

[0036] In one possible implementation, the communication control method further includes: one of the plurality of second couplers receiving a communication signal, and another of the plurality of second couplers outputting a communication signal; the controller acquiring a first channel for connecting to the source node and a first channel for connecting to the destination node.

[0037] In one possible implementation, the controller listens for signal frames to acquire a first channel for connecting to the source node and a first channel for connecting to the destination node.

[0038] A fifth aspect of this application provides a computer-readable storage medium storing computer program code, which, when executed on a computer, causes the computer to perform the communication control method of the fourth aspect.

[0039] A sixth aspect of the present application provides a computer program product that, when run on a computer, causes the computer to execute the communication control method of the fourth aspect. Attached Figure Description

[0040] Figure 1 A schematic diagram of a point-to-multipoint star-shaped networking system provided in this application embodiment;

[0041] Figure 2 A schematic diagram of a communication device provided in an embodiment of this application;

[0042] Figure 3 An architecture diagram of a communication system provided in an embodiment of this application;

[0043] Figure 4 A topology diagram of a communication system provided in an embodiment of this application;

[0044] Figure 5 This is a topology diagram of another communication system provided in an embodiment of this application;

[0045] Figure 6 A topology diagram of another communication system provided in the embodiments of this application;

[0046] Figure 7 A topology diagram of another communication system provided in the embodiments of this application;

[0047] Figure 8 A topology diagram of another communication system provided in the embodiments of this application;

[0048] Figure 9A This application provides an architecture diagram of another communication system provided in its embodiments.

[0049] Figure 9BA topology diagram of another communication system provided in the embodiments of this application;

[0050] Figure 10A This application provides an embodiment of another communication system architecture diagram;

[0051] Figure 10B This application provides an embodiment of another communication system architecture diagram;

[0052] Figure 11A A topology diagram of another communication system provided in the embodiments of this application;

[0053] Figure 11B A topology diagram of another communication system provided in the embodiments of this application;

[0054] Figure 12 A topology diagram of a communication device provided in an embodiment of this application;

[0055] Figure 13 A topology diagram of another communication device provided in the embodiments of this application;

[0056] Figure 14 This is a topology diagram of another communication device provided in the embodiments of this application. Detailed Implementation

[0057] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0058] Hereinafter, the terms "second," "first," etc., are used for descriptive convenience only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "second," "first," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0059] Furthermore, in the embodiments of this application, directional terms such as "upper," "lower," "left," and "right" may be defined relative to the orientation in which the components are schematically placed in the accompanying drawings. It should be understood that these directional terms can be relative concepts, used for relative description and clarification, and can change accordingly based on the orientation of the components in the accompanying drawings.

[0060] In the embodiments of this application, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, the term "coupling" can be a direct electrical connection or an indirect electrical connection through an intermediate medium. The term "contact" can be direct contact or indirect contact through an intermediate medium.

[0061] In this embodiment of the application, "and / or" describes the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following associated objects have an "or" relationship.

[0062] Before introducing the embodiments of this application, the technical terms and background technology involved in this application will be introduced first.

[0063] Domain master (DM): Generally, the device that communicates with the uplink main router is configured in domain management mode and domain information is established. This device that communicates with the uplink main router can be called the domain management device. Other sub-routing devices or routers join the domain to form a network.

[0064] Endpoint (EP): Other sub-routing devices or slave routing devices that have joined the domain can be called endpoint devices.

[0065] Single-input single-output (SISO) refers to a communication method that uses one transmitting antenna and one receiving antenna at the transmitting and receiving ends, respectively, so that the signal is transmitted and received through a single antenna at both ends.

[0066] Multiple-input multiple-output (MIMO) refers to a communication method that uses multiple transmit antennas and receive antennas at both the transmitting and receiving ends, allowing signals to be transmitted and received through multiple antennas at both ends, thereby improving communication quality.

[0067] Signal-to-noise ratio (SNR): The ratio of signal to noise in an electronic device or system. Signal refers to the electronic signal from outside the device that needs to be processed by it, while noise refers to irregular additional signals (or information) generated after passing through the device that are not present in the original signal and do not change with the original signal.

[0068] This application provides a communication system for implementing point-to-multipoint transmission / communication. Example: The communication system is a point-to-multipoint (P2MP) wired communication system.

[0069] A typical P2MP communication system includes master and slave nodes, generally consisting of one master node and multiple slave nodes. Examples include the domain master (DM) and end point (EP) nodes defined in the G.hn protocol, or the center coordinator (CCO) and station (STA) nodes defined in the Homeplug protocol. The domain master is typically configured as a DM in the device connected to the uplink parent router to establish domain information. Other child routes or slave routes join this domain as end points (EPs), forming a network. Similarly, the center coordinator is configured as a CCO in the device connected to the uplink parent router to establish domain information. Other child routes or slave routes join this domain as stations (STAs), forming a network.

[0070] Example of a P2MP system, such as Figure 1 As shown, the P2MP system includes a domain administrator (DM) and multiple endpoints. Figure 1 The following diagram illustrates a P2MP system comprising end nodes EP1, EP2, EP3, ..., EPn. A star topology network is formed by directly connecting the domain administrator (DM) and each end node via cables to achieve wired communication for P2MP.

[0071] In P2MP wired communication, when the network topology is star-shaped, only one end node among multiple end nodes can communicate at any given time. However, the other end nodes still act as loads on the star bus. These load-bearing end nodes still consume energy, resulting in wasted energy. This can lead to insufficient signal strength from the communicating end node, affecting the signal-to-noise ratio (SNR) and ultimately causing a limitation on transmission speed.

[0072] To address the issue in P2MP system communication where the energy consumed by the load connected to the star bus leads to insufficient signal power at the end nodes, resulting in reduced transmission rates at the end nodes.

[0073] This application proposes a communication device that improves the problem of load energy consumption by redistributing power consumption on a star bus.

[0074] In some embodiments, the communication system is adapted to the Homeplug protocol, and the communication device is coupled to the central coordinator (CCO) device and / or the tail node (STA) device in the communication system.

[0075] In other embodiments, the communication system is adapted to the Homeplug protocol, and the communication devices are integrated into the central coordinator (CCO) device and / or the tail node (STA) device in the communication system.

[0076] In some other embodiments, the communication system is adapted to the G.hn protocol, and the communication device is coupled to the domain administrator (DM) device and / or the end node (EP) device in the communication system.

[0077] In some other embodiments, the communication system is adapted to the G.hn protocol, and the communication devices are integrated into the domain administrator (DM) device and / or end node (EP) device within the communication system.

[0078] Of course, the communication system can also be adapted to other protocols, and the communication device can be coupled to the master node and / or slave node of the communication system.

[0079] In this embodiment, the communication system includes a domain manager (DM) device and end-node (EP) devices as an example. Of course, the domain manager (DM) device can be replaced by a central coordinator (CCO) device, and the end-node (EP) devices can be replaced by tail-end node (STA) devices.

[0080] Regarding the structure of communication device 1, as follows: Figure 2 As shown, the communication device 1 includes one or more channel groups. Figure 2 The Sino-Israeli communication device 1 includes a channel group as an example for illustration.

[0081] Continue to refer to Figure 2 The channel group includes a first coupler 10, a plurality of first channels 20 and a plurality of second couplers 30.

[0082] In this embodiment, the first coupler 10 includes a first end 11 and a plurality of second ends 12. It is understood that, for clarity, this embodiment is illustrated by assuming the output ends of the first end 11 face the left side of the first coupler 10 and the output ends of the second ends 12 face the right side of the first coupler 10. However, in the winding layout of the first coupler 10, the orientation of the output ends of the first end 11 and the second end 12 is not limited; they can be reasonably set according to the layout structure. The structure coupled to the first end 11 and the structure coupled to the second end 12 in the communication device 1 are different. In conjunction with the following description, the first end 11 and the second end 12 of the first coupler 10 can be defined by the coupling structure.

[0083] In some embodiments, the number of second terminals 12 is the same as the number of first channels 20 and second couplers 30. For example, the communication device 1 includes m first channels 20, m second couplers 30, and m second terminals 12.

[0084] One end of each of the multiple first channels 20 is coupled to one of the multiple second ends, and the other end of each of the multiple first channels 20 is coupled to one of the multiple second couplers 30. Alternatively, it can be understood that the multiple first channels 20 are coupled between the multiple second ends 12 and the multiple second couplers 30.

[0085] Each first channel 20 has one end and another end, referred to in this example as the first end and the second end of the first channel 20. Therefore, one end of the plurality of first channels 20 constitutes the plurality of first ends of the plurality of first channels 20, and the second ends of the plurality of first channels 20 constitute the plurality of second ends of the plurality of first channels 20. The plurality of first ends of the plurality of first channels 20 are coupled to the plurality of second ends 12 of the first coupler 10, forming a one-to-one correspondence. The plurality of second ends of the plurality of first channels 20 are coupled to the plurality of second couplers 30, forming a one-to-one correspondence. Figure 2 The topology shown illustrates multiple first channels 20 placed side by side, but in the actual layout, it is not limited to multiple first channels 20 placed side by side; they can be arranged reasonably as needed.

[0086] In some embodiments, the first channel 20 includes a first branch 21 and a second branch 22, wherein the impedance of the first branch 21 is greater than the impedance of the second branch 22.

[0087] Impedance is a physical quantity that represents the performance of a component or the electrical performance of a circuit. In an AC circuit, the ratio of the peak (or effective) voltage Um across a passive circuit segment to the peak (or effective) current Im flowing through that circuit is called impedance, denoted by z, and its unit is ohms (Ω). With a constant U, the larger z is, the smaller I is; impedance has a limiting effect on current. Impedance (electrical impedance), also known as resistance reactance, is the collective term for the opposition to alternating current by resistance, inductance, and capacitance in a circuit. Impedance is a complex number; the real part is called resistance, and the imaginary part is called reactance. Specifically, the opposition to alternating current by capacitance in a circuit is called capacitive reactance, and the opposition to alternating current by inductance in a circuit is called inductive reactance. Capacitive reactance and inductive reactance together are called reactance.

[0088] In this embodiment, the impedance of the first branch 21 can be the impedance between the first coupler 10 and the second coupler 30. Similarly, the impedance of the second branch 22 can be the impedance between the first coupler 10 and the second coupler 30.

[0089] In some embodiments, the impedance of the first branch 21 is significantly greater than the impedance of the second branch 22. For example, the first branch 21 is a high-impedance branch, and the second branch 22 is a direct signal path. Alternatively, for example, the impedance of the first branch 21 is more than five times the impedance of the second branch 22. For instance, the impedance of the first branch 21 is 10, 15, 20, 30, 50, or more times the impedance of the second branch 22.

[0090] In some other embodiments, the inductive reactance of the first branch 21 is greater than that of the second branch 22.

[0091] The first channel 20 is used to select whether to transmit the communication signal transmitted by the communication device 1 via the first branch 21 or via the second branch 22.

[0092] In other words, in this embodiment of the application, for the first channel 20, the communication signal is transmitted either through the first branch 21 or through the second branch 22. For example, in the first channel 20 connected to the source node or the destination node, the communication signal is transmitted through the second branch 22. For the first channel 20 not connected to the source node or the destination node, the communication signal is transmitted through the first branch 21.

[0093] Of course, the direction of signal flow is not limited in the embodiments of this application. For example, the communication signal may flow through the first channel 20 to the second coupler 30 and then be output. Alternatively, the second coupler 30 may receive the communication signal and transmit it away from the second coupler 30 through the first channel 20.

[0094] The communication device 1 provided in this application embodiment includes a first channel 20 comprising a first branch 21 and a second branch 22 with different impedances. The first channel 20 has the function of selecting whether a communication signal flows through the first branch 21 or the second branch 22. Therefore, some (one or more) of the first channels 20 can choose to transmit the communication signal through the first branch 21, and some (one or more) of the first channels 20 can choose to transmit the communication signal through the second branch 22. Since the impedance of the first branch 21 is greater than that of the second branch 22, the first channel 20 receiving the communication signal through the first branch 21 receives a smaller signal power, while the first channel 20 receiving the communication signal through the second branch 22 receives a larger signal power. This ensures that not all first channels 20 receive equal signal power. First channels 20 not connected to the source or destination node can receive less signal power, while first channels 20 connected to the source or destination node receive more signal power, thereby increasing the transmission rate of the first channels 20 connected to the source or destination node and thus increasing the transmission rate between the two nodes coupled to both ends of the first channel 20. Moreover, each first channel 20 can dynamically switch between the first branch 21 and the second branch 22 according to the application scenario, so that the first channel 20 connecting the source node or the destination node can choose to have the communication signal flow through the second branch 22 at any time, so as to allocate a larger signal power and enable the first channel 20 connecting the source node or the destination node to have a faster transmission rate at any time.

[0095] The following examples illustrate the communication device, communication control method of the communication device, and communication system applied to the communication device provided in the embodiments of this application.

[0096] Example 1

[0097] like Figure 3 As shown in the figure, this application provides a communication system, which includes a first device 100, a plurality of second devices 200 and a third device 300.

[0098] The communication system provided in this application embodiment can be, for example, a P2MP communication system or other wired communication systems, such as network cables, twisted-pair cables, power lines, DC power cables, etc.

[0099] The first device 100 has a first port 110 and multiple second ports 120. Multiple second devices 200 are coupled to the first device 100 through first cables 400. That is, the multiple second devices 200 and the multiple second ports 120 are coupled to each other through multiple first cables 400, and there is a one-to-one correspondence between the second devices 200 and the second ports 120.

[0100] Of course, the first device 100 may also include ports used for other functions. This application embodiment does not limit this. This application embodiment only illustrates the first port 110 and the second port 120.

[0101] The third device 300 is coupled to the first port 110 of the first device 100 via the second cable 500.

[0102] Figure 3 In the communication system shown, the first device 100 can be understood as an intermediate transmission medium, and the third device 300 communicates with the second device 200 through the first device 100.

[0103] The first cable 400 and the second cable 500 can be, for example, power lines, network cables, twisted-pair cables, DC power cables, etc.

[0104] In some embodiments, the third device 300 is a domain administrator (DM) device, and the second device 200 is an end node (EP) device. The domain administrator (DM) illustrated below can be understood as a domain administrator (DM) device in a communication system. The end node (EP) can be understood as an end node (EP) device in a communication system.

[0105] In some embodiments, the first device 100 includes the communication device 1 provided in the present application embodiments, and the signal power on the communication path is redistributed through the communication device 1 to improve the transmission rate of the second device 200 that is communicating.

[0106] Regarding the structure of the communication device 1, in some embodiments, the communication device 1 adopts a single-input single-output (SISO) data transmission mode.

[0107] like Figure 4 As shown, the communication device 1 includes a channel group, which includes a first coupler 10, a plurality of first channels 20 and a plurality of second couplers 30.

[0108] The first coupler 10 includes a first end 11 and a plurality of second ends 12. One end of a plurality of first channels 20 is coupled to a plurality of second ends, and the other end of a plurality of first channels 20 is coupled to a plurality of second couplers 30.

[0109] For example, the first coupler 10 is a combiner used to convert a single signal into multiple signals. For instance, the first coupler 10 includes a first coil L1 and multiple second coils L2. The two ends of the first coil L1 are coupled to a first terminal 11 of the first combiner 10, and the two ends of the second coils L2 are coupled to a second terminal 12 of the first combiner 10. The first coil L1 and the second coils L2 are magnetically coupled, and the multiple second coils L2 can also be electromagnetically coupled to each other. In some embodiments, the number of turns of the first coil L1 and the second coils L2 are different; by adjusting the turns ratio of the first coil L1 and the second coil L2, the signal amplitude can be amplified or reduced.

[0110] For example, the second coupler 30 includes a magnetically coupled third coil L3 and a fourth coil L4. The two ends of the third coil L3 are coupled to the first channel 20, and the two ends of the fourth coil L4 are coupled to the external port of the communication device 1. The second coupler 30 is used to couple the received signal to the first cable 400 for transmission.

[0111] The first channel 20 includes a first branch 21 and a second branch 22, wherein the impedance of the first branch 21 is greater than the impedance of the second branch 22. The first channel 20 is used to select whether to transmit the communication signal transmitted by the communication device 1 via the first branch 21 or via the second branch 22.

[0112] Therefore, the first branch 21 presents high impedance to the communication signal, while the second branch 22 presents low impedance to the communication signal. Alternatively, if the signal transmitted by the communication device 1 is a broadband signal, the first branch 21 will have different levels of impedance for different bandwidths. For example, the first branch 21 may present high impedance for some bandwidths and low impedance for others.

[0113] In some embodiments, the inductive reactance of the first branch 21 is greater than that of the second branch 22.

[0114] Since inductors or ferrite beads have the characteristic of passing low frequencies and blocking high frequencies, the first branch 21 has a large impedance by setting a large inductive reactance. When the impedance of the first branch 21 is greater than the impedance of the second branch 22, this method allows low-frequency signals in the communication signal to be transmitted through the first branch 21, which is convenient for communication equipment to listen to and obtain the communication status of the first channel 20.

[0115] In some embodiments, the resistance of the first branch 21 is greater than the resistance of the second branch 22. This results in a simple structure and low cost for the first channel 20.

[0116] In some embodiments, the capacitive reactance of the first branch 21 is greater than that of the second branch 22. This results in a simpler structure and lower cost for the first channel 20.

[0117] Regarding the structure of the first channel 20, in some embodiments, the first branch 21 includes a first passive circuit, the second branch 22 includes a second passive circuit, and the first channel 20 also includes a first switching circuit 23.

[0118] The first passive circuit and the second passive circuit are connected in parallel and in series with the first switching circuit 23. The impedance of the first passive circuit is greater than the impedance of the second passive circuit.

[0119] In some embodiments, the first passive circuit includes one or more of the following: resistor, inductor, ferrite bead, and capacitor.

[0120] In some embodiments, the second passive circuit includes one or more of the following: resistor, inductor, ferrite bead, and capacitor.

[0121] The first passive circuit and the second passive circuit can include the same types of passive components, as long as the impedance of the first passive circuit is greater than the impedance of the second passive circuit.

[0122] For example, both the first passive circuit and the second passive circuit include resistors, and the resistance value of the first resistor in the first passive circuit is greater than the resistance value of the second resistor in the second passive circuit.

[0123] In other embodiments, the second passive circuit includes a signal line, and the second passive circuit is a straight-through path (or a normal signal loop).

[0124] In this embodiment, the first branch 21 includes a first passive circuit and is a high-impedance signal path, while the second branch 22 includes a signal line and is a low-impedance signal path.

[0125] In some embodiments, the inductive reactance of the first passive circuit is greater than that of the second passive circuit.

[0126] For example, the first passive circuit and the second passive circuit may consist of only inductors, or the first passive circuit may include an inductor and the second passive circuit may include signal lines.

[0127] In this embodiment of the application, the first switching circuit 23 is used to select the first passive circuit to be connected to the second coupler 30 according to the first control signal, or to select the second passive circuit to be connected to the second coupler 30 according to the first control signal.

[0128] For example, the first switching circuit 23 includes a 2-input, 1-output selector switch. The fixed end of the selector switch is coupled to the second device 30, the selector end of the selector switch is coupled to the first passive circuit or the second passive circuit, and the control end of the selector switch is used to receive the first control signal.

[0129] For example, if the first control signal controls the selector switch to the open state F, then the communication signal flows in the first branch 21, and the corresponding circuit is called a high-impedance circuit. If the first control signal controls the selector switch to the closed state O, then the communication signal flows in the second branch 22, and the corresponding circuit is called a normal circuit.

[0130] Alternatively, when the first control signal controls the selector switch to be in the closed state O, the communication signal can flow in the first branch 21. When the first control signal controls the selector switch to be in the open state F, the communication signal can flow in the second branch 22.

[0131] Alternatively, for example, the first switching circuit 23 is a 3-input, 1-output selector switch, and the selector terminal of the selector switch can also be connected to other devices (such as Ethernet) to transmit the communication signals of other devices to the second device 200.

[0132] Of course, the first switching circuit 23 can be connected in series with the first passive circuit (or the second passive circuit). Figure 4 As shown, the first switching circuit 23 is coupled to the second terminal 12 of the first coupler 10, and the first passive circuit is coupled to the second coupler 30. Alternatively, the first switching circuit 23 can be coupled to the second coupler, and the first passive circuit can be coupled to the second terminal 12 of the first coupler 10.

[0133] In some embodiments, the communication device 1 further includes a controller for outputting the first control signal described above.

[0134] When communication device 1 is applied to a communication system, third device 300 sends a communication signal (e.g., a signal source generated by a demodulation chip). The signal source can be a differential signal, including differential signal P and differential signal N. Differential signal P and differential signal N are a pair of differential signals with the same frequency but opposite phase. The communication signal sent by third device 300 is transmitted to communication device 1 via second cable 500. First coupler 10 couples the communication signal to each of second couplers 30. Second couplers 30 then transmit the communication signal to second device 200 via first cable 400 to complete the signal transmission.

[0135] The second device 200 includes, for example, a transformer and a magnetically coupled fifth coil L5 and a sixth coil L6. The two ends of the fifth coil L5 are coupled to the first cable 400 to couple the communication signal output by the communication device 1 to the sixth coil L6.

[0136] The communication control method provided in the embodiments of this application will be illustrated below.

[0137] This application provides a communication control method, which can be applied, for example, to the communication device 1 described above.

[0138] Communication control methods, including:

[0139] The communication signals received and transmitted by the communication device 1 are transmitted through the first channel 20; the first channel 20, which is not used to connect the source node or the destination node, selects to transmit the communication signals through the first branch 21; the first channel 20 used to connect the source node or the destination node selects to transmit the communication signals through the second branch 22.

[0140] The first channel 20 used to connect the source node or the destination node is called the current communication first channel 20. The current communication first channel 20 selects to transmit the communication signal through the second branch 22. The first channel 20 not used to connect the source node or the destination node is called the non-communication first channel 20. The non-communication first channel 20 selects to transmit the communication signal through the first branch 21. Here, "non-communication" does not mean that no communication signal is transmitted, but only that the communication signal is not transmitted to the source node or the destination node.

[0141] In some embodiments, the communication device 1 further includes a second channel, and the communication control method further includes:

[0142] The communication signal is transmitted through the second channel 40; the second channel 40 selects the communication signal to be transmitted through the third passive circuit 42 according to the second control signal, or selects the communication signal to be transmitted through the fourth passive circuit 43 according to the second control signal.

[0143] For example, when the second channel 40 is used to connect a source node or a destination node, the controller sends a second control signal to the second channel 40 to control the second switching circuit 44 to select the communication signal to be transmitted via the fourth passive circuit 43.

[0144] In other words, when the communication signal needs to be transmitted to the source node or the destination node through the second channel 40, the fourth passive circuit 43 in the second channel 40 transmits the communication signal.

[0145] When the second channel 40 is not used to connect the source node or the destination node, the second control signal sent by the controller to the second channel 40 controls the second switching circuit 44 to select the communication signal to be transmitted through the third passive circuit 42.

[0146] In other words, when the communication signal does not need to be transmitted to the source node or the destination node through the second channel 40, the third passive circuit 42 in the second channel 40 transmits the communication signal.

[0147] In some embodiments, the third device 300 is used as the source node (source id, SID), and the second device 200 is used as the destination node (destination id, DID, which can also be called the target node), and the communication signal flows from the side where the first coupler 10 is located to the side where the second coupler 30 is located.

[0148] For example, the first coupler 10 receives a communication signal sent by the source node, and one of the plurality of second couplers 30 outputs a communication signal to the destination node. A first channel 20 for connecting to the destination node is obtained.

[0149] For example, a third device 300 acts as the source node, a second device 200 acts as the destination node, and the remaining second devices act as listening nodes. A first coupler 10 receives communication signals from the third device 300 and couples these signals to multiple first channels 20. The first channel 20 communicating with the destination node is the currently communicating first channel 20, and the first channel 20 communicating with the listening nodes is the not communicating first channel 20.

[0150] The first communication channel 20 among the multiple first channels 20 transmits the communication signal to the second coupler 30 via the second branch 22, while the first non-communication channel 20 among the multiple first channels 20 transmits the communication signal to the second coupler 30 via the first branch 21. Each second coupler 30 outputs the received communication signal as the output of the communication device 1 and transmits it to the second device 200.

[0151] P2MP communication systems utilize point-to-multipoint time-division duplex (TDD) technology. For a second device 200 (e.g., end node EP), at any given time, only one of the multiple second devices 200 interacts with a third device 300 (e.g., domain administrator DM) for data exchange. During this time, the other second devices 200 are in a listening state (reading the frame header to determine if the data frame is intended for themselves). Therefore, the second device 200 interacting with the third device 300 is referred to as the destination node in the communication state, while the other second devices 200 are referred to as listening nodes in the listening state.

[0152] Since the third device 300 acts as the source node and the second device 200 acts as the destination node, the communication system already knows the source node, destination node, and listening node. Therefore, the controller can directly determine which first channel 20 is communicating and which first channel 20 is not communicating.

[0153] In some embodiments, the communication control method includes:

[0154] Obtain the correspondence between the second device 200 and the first channel 20 in the communication device 1.

[0155] Alternatively, it can be understood as obtaining which second device 200 is coupled to which first channel 20 through the first cable 400, thus obtaining the correspondence between the second device 200 and the communication device 1.

[0156] Since it is known which second device 200 is the destination node and which is the listening node, after obtaining the correspondence between the second device 200 and the first channel 20, it can be determined which first channel 20 is in a communication state and whose communication signal needs to flow through the second branch 22, and which first channel 20 is in a non-communication state and whose communication signal needs to flow through the first branch 21.

[0157] At this time, the controller sends first control signals to multiple first channels 20 respectively. The first control signal sent by the controller to the first channel 20 connected to the source node or the destination node controls the first switching circuit 23 to select the communication signal for transmission via the second branch 22. The first control signal sent by the controller to the first channel 20 not connected to the source node controls the first switching circuit 23 to select the communication signal for transmission via the first branch 21, so that the first coupler 10 receives the communication signal and outputs the communication signal via the second coupler 30.

[0158] like Figure 4 As shown, the nth end node EPn is the destination node, and the remaining end nodes are listening nodes. (The remaining nodes are not directly related to the previous sentence and can be omitted.) Figure 4 The diagram illustrates the first channel 20, where the first terminal node EP1 and the second terminal node EP2 are coupled. The bolded portion represents the current loop from the first coupler 10 to the second coupler 30. Under the control of the first control signal, the switching switch in the first switching circuit 23 is in the open state F, and the switching switch is coupled to the first branch 21. The entire current loop must flow through the high-impedance first passive circuit, resulting in a very large impedance loop and a relatively large current I1.

[0159] In the first channel 20 coupled to the nth terminal node EPn, the bolded portion represents the current return path from the first coupler 10 to the second coupler 30. Under the control of the first control signal, the switching switch in the first switching circuit 23 is in the closed state O, and the switching switch is coupled to the second branch 22. The entire current loop flows through the low-impedance signal line (or the second passive circuit), and the impedance of the entire current loop is very small, constituting a normal loop. The current I2 in the entire loop is relatively large, much greater than the current I1 in the high-impedance loop. In this way, during the transmission of the communication signal, most of the signal power is allocated to this normal loop, which can improve the transmission rate of the communicating loop.

[0160] In other embodiments, the second device 200 serves as the source node and the third device 300 serves as the destination node, with the communication signal flowing from the side where the second coupler 30 is located to the side where the first coupler 10 is located.

[0161] For example, one of the multiple second couplers 30 receives a communication signal sent by the source node, the first coupler 10 outputs a communication signal to the destination node, and the controller acquires a first channel 20 for connecting to the source node.

[0162] For example, the controller listens to signal frames and can determine the source node and destination node by demodulating the frame header. This allows it to know the correspondence between the second coupler 30 used for coupling to the source node and the first channel 20, and to determine the first channel 20 connected to the source node (the first channel 20 currently in communication) and the first channel 20 not connected to the source node (the first channel 20 currently not in communication).

[0163] The controller sends a first control signal to the first channel 20 connected to the source node or destination node, which controls the first switching circuit 23 to select the communication signal to be transmitted via the second branch 22. The controller sends a first control signal to the first channel 20 not connected to the source node, which controls the first switching circuit 23 to select the communication signal to be transmitted via the first branch 21.

[0164] For example, such as Figure 4 As shown, the nth end node EPn acts as the source node, the remaining end nodes act as listening nodes, and the domain administrator DM acts as the destination node. The end nodes other than the nth end node EPn (the end nodes acting as listening nodes)... Figure 4 The diagram illustrates the first channel 20, where the first end node EP1 and the second end node EP2 are coupled. The bolded portion represents the current return path from the second coupler 30 to the first coupler 10. Under the control of the first control signal, the switch in the first switching circuit 23 is in the open state F, and the switch is coupled to the first branch 21. The entire current loop must flow through the high-impedance first passive circuit, resulting in a very high-impedance loop. Therefore, the signal power in the end node acting as the listening node is almost never transmitted to the domain manager DM.

[0165] In the first channel 20 coupled to the nth terminal node EPn, the bolded portion represents the current loop from the first coupler 10 to the second coupler 30. Under the control of the first control signal, the switch in the first switching circuit 23 is in the closed state O, and the switch is coupled to the second branch 22. The entire current loop flows through the low-impedance signal line (or the second passive circuit), and the impedance of the entire current loop is very small, constituting a normal loop. Therefore, most of the signal power transmitted by the nth terminal node EPn, as the source node, can be transmitted to the domain administrator DM.

[0166] After execution, if the channel changes, the domain manager (DM) or the end node, acting as the receiver, can re-estimate the channel based on the additional channel estimation (ACE) symbols, demodulate the payload symbols in the frame structure to obtain data, and then dynamically switch the branch again.

[0167] The communication device 1 provided in this application embodiment includes a first channel 20 comprising a first branch 21 and a second branch 22 with different impedances. The first channel 20 has the function of selecting whether a communication signal flows through the first branch 21 or the second branch 22. Therefore, some (one or more) of the first channels 20 can choose to transmit the communication signal through the first branch 21, and some (one or more) of the first channels 20 can choose to transmit the communication signal through the second branch 22. Since the impedance of the first branch 21 is greater than that of the second branch 22, the first channel 20 receiving the communication signal through the first branch 21 receives a smaller signal power, while the first channel 20 receiving the communication signal through the second branch 22 receives a larger signal power. This ensures that not all first channels 20 receive equal signal power. First channels 20 not connected to the source or destination node can receive less signal power, while first channels 20 connected to the source or destination node receive more signal power, thereby increasing the transmission rate of the first channels 20 connected to the source or destination node, and thus increasing the transmission rate between the two nodes coupled to both ends of the first channel 20. Furthermore, each first channel 20 can dynamically switch between the first branch 21 and the second branch 22 according to the application scenario, thereby achieving dynamic distribution of signal power. Thus, at any given moment, the first channel 20 connecting the source node or the destination node can choose to have the communication signal flow through the second branch 22 to obtain a larger signal power, ensuring a faster transmission rate for each first channel 20 connecting the source node or the destination node.

[0168] Example 2

[0169] Example 2 has the same communication system architecture as Example 1, the main difference being the structure of the communication device 1 in the first device 100.

[0170] This application provides a communication system, which includes a first device 100, a plurality of second devices 200 and a third device 300.

[0171] The coupling relationship between the first device 100, the second device 200, and the third device 300 can be referred to the relevant description in Example 1, and will not be repeated here.

[0172] The first device 100 includes the communication device 1 provided in the embodiments of this application. The communication device 1 redistributes the signal power on the communication path to improve the transmission rate of the second device 200 that is communicating.

[0173] Regarding the structure of the communication device 1, in some embodiments, the communication device 1 adopts a single-input single-output (SISO) data transmission mode.

[0174] like Figure 5 As shown, the communication device 1 includes a channel group, which includes a first coupler 10, a plurality of first channels 20, a plurality of second couplers 30, and a third coupler 41.

[0175] The structure and coupling method of the first coupler 10, the multiple first channels 20, and the multiple second couplers 30 are the same as those in Example 1, and will not be repeated here. This example focuses on the third coupler 41.

[0176] like Figure 5 As shown, the channel group also includes a second channel 40, which includes a third coupler 41. One end of the third coupler 41 is coupled to the first end 11 of the first coupler 10, and the other end of the third coupler 41 is coupled to the external port of the communication device 1.

[0177] In this example, the structure of the first channel 20 is different from that of the second channel 40. Therefore, by judging the circuit structure of the port coupling of the first coupler 10, the first end 11 and the second end 12 of the first coupler 10 can be distinguished.

[0178] For example, the third coupler 41 includes a transformer, which includes a magnetically coupled seventh coil L7 and an eighth coil L8. The two ends of the seventh coil L7 are coupled to the external port of the communication device 1, and the two ends of the eighth coil L8 are coupled to the first end 11 of the first coupler 10.

[0179] In this way, the communication signal output by the third device 300 can be coupled to the first coupler 10 via the third coupler 41, and then coupled and transmitted to the second device 200. The signal output by the second device 200 can also be coupled to the first coupler 10 via the second coupler 30, and then coupled and transmitted to the third device 300.

[0180] In other words, when the communication device 1 provided in this application embodiment is applied to a communication system, the communication system can achieve bidirectional transmission. That is, it can enable the third device 300 to send signals to the second device 200, and it can also enable the second device 200 to send signals to the third device 300.

[0181] Based on this, the communication control method provided in the embodiments of this application includes:

[0182] Using the third device 300 as the source node and the second device 200 as the destination node, the communication signal flows from the side where the third coupler 41 is located to the side where the second coupler 30 is located.

[0183] For example, the third coupler 41 receives the communication signal sent by the third device 300 and couples the communication signal to the first coupler 10. The first coupler receives the communication signal and outputs the communication signal through the second coupler 30.

[0184] The third coupler 41 is connected to the third device 300 via the second cable 500, and the communication signal output by the third device 300 can be transmitted to the third coupler 41. The communication signal received by the first coupler 10 is the communication signal coupled by the third coupler 41. The process of the first coupler 10 receiving the communication signal and outputting it through the second coupler 30 is the same as in Example 1, and will not be repeated here.

[0185] In other words, the communication process of sending signals from the third device 300 to the second device 200, compared with Example 1, includes the coupling process of the third coupler 41, while other communication processes are similar.

[0186] Since the communication device provided in this example has bidirectional communication capabilities, in addition to using the third device 300 as the source node and the second device 200 as the destination node, it is also possible to use the second device 200 as the source node and the third device 300 as the destination node. In this case, it is necessary to first obtain the source node and the destination node.

[0187] The communication control method provided in this embodiment is the same as that in Example 1, and can be found in the relevant description.

[0188] For example, Figure 5 In this context, the nth end node EPn acts as the source node, the remaining end nodes act as listeners, and the domain administrator DM acts as the destination node. This is in contrast to the other end nodes besides the nth end node EPn (the end nodes acting as listeners). Figure 5 The diagram illustrates the first channel 20, where the first end node EP1 and the second end node EP2 are coupled. The bolded portion represents the current return path from the second coupler 30 to the first coupler 10. Under the control of the first control signal, the switch in the first switching circuit 23 is in the open state F, and the switch is coupled to the first branch 21. The entire current loop must flow through the high-impedance first passive circuit, resulting in a very high-impedance loop. Therefore, the signal power in the end node acting as the listening node is almost never transmitted to the domain manager DM.

[0189] In the first channel 20 coupled to the nth terminal node EPn, the bolded portion represents the current loop from the first coupler 10 to the second coupler 30. Under the control of the first control signal, the switch in the first switching circuit 23 is in the closed state O, and the switch is coupled to the second branch 22. The entire current loop flows through the low-impedance signal line (or the second passive circuit), and the impedance of the entire current loop is very small, constituting a normal loop. Therefore, most of the signal power transmitted by the nth terminal node EPn, as the source node, can be transmitted to the domain administrator DM.

[0190] The communication device 1 provided in this embodiment of the application, by incorporating a third coupler 41, enables the communication device 1 to transmit signals not only from the first coupler 10 side to the second coupler 30 side, but also from the second coupler 30 side to the first coupler 10 side. That is, the communication device 1 has bidirectional transmission capability. Furthermore, since the first channel 20 includes a first branch 21 and a second branch 22 with different impedances, by adjusting the flow path of the communication signal, the first channel 20 connected to the source node or destination node can have a smaller impedance, while the first channel 20 not connected to the source node or destination node can have a larger impedance. In this way, when the communication device 1 transmits bidirectionally, the signal power in the communication path is always maximized, thereby improving the transmission rate.

[0191] Example 3

[0192] Example 3 has the same communication system architecture as Example 2, the main difference being the structure of the communication device 1 in the first device 100.

[0193] This application provides a communication system, which includes a first device 100, a plurality of second devices 200 and a third device 300.

[0194] The coupling relationship between the first device 100, the second device 200, and the third device 300 can be referred to the relevant description in Example 1, and will not be repeated here.

[0195] The first device 100 includes the communication device 1 provided in the embodiments of this application. The communication device 1 redistributes the signal power on the communication path to improve the transmission rate of the second device 200 that is communicating.

[0196] Regarding the structure of the communication device 1, in some embodiments, the communication device 1 adopts a single-input single-output (SISO) data transmission mode.

[0197] like Figure 6As shown, the communication device 1 includes a channel group, which includes a first coupler 10, a plurality of first channels 20, a plurality of second couplers 30, a third coupler 41, a third passive circuit 42, a fourth passive circuit 43, and a second switching circuit 44.

[0198] The structure and coupling method of the first coupler 10, the multiple first channels 20, the multiple second couplers 30, and the third coupler 41 are the same as those in Example 2, and will not be repeated here. This example focuses on explaining the third passive circuit 42, the fourth passive circuit 43, and the second switching circuit 44.

[0199] like Figure 6 As shown, the channel group also includes a second channel 40, which includes a third coupler 41, a third passive circuit 42, a fourth passive circuit 43, and a second switching circuit 44.

[0200] One end of the third coupler 41 is coupled to the first end 11 of the first coupler 10, and the other end of the third coupler 41 is coupled to the external port of the communication device 1. The structure of the third coupler 41 can be the same as that of the third coupler 41 in Example 2, and will not be described again here.

[0201] In this embodiment, the impedance of the third passive circuit 42 is greater than the impedance of the fourth passive circuit 43.

[0202] In some embodiments, the third passive circuit 42 may include one or more of the following: resistor, inductor, ferrite bead, and capacitor.

[0203] In some embodiments, the fourth passive circuit 43 may include one or more of the following: resistor, inductor, ferrite bead, and capacitor.

[0204] The types of passive components included in the third passive circuit 42 and the fourth passive circuit 43 can be the same, as long as the impedance of the third passive circuit 42 is greater than the impedance of the fourth passive circuit 43.

[0205] For example, both the third passive circuit 42 and the fourth passive circuit 43 include resistors, and the resistance value of the third resistor included in the third passive circuit 42 is greater than the resistance value of the fourth resistor included in the fourth passive circuit 43.

[0206] In other embodiments, the fourth passive circuit 43 includes a signal line, and the fourth passive circuit 43 is a straight-through path (or a normal signal loop). Figure 6 The fourth passive circuit 43, including signal lines, is illustrated as an example.

[0207] In this embodiment of the application, the inductive reactance of the third passive circuit 42 may also be greater than that of the fourth passive circuit 43.

[0208] The third passive circuit 42 and the fourth passive circuit 43 are connected in parallel and coupled in series with the second switching circuit 44 between the third coupler 41 and the first end 11 of the first coupler 10.

[0209] The third passive circuit 42 (or the fourth passive circuit 43) is connected in series with the second switching circuit 44. Figure 6 The example shown is that the second switching circuit 44 is positioned close to the first end 11. Alternatively, the second switching circuit 44 can be positioned close to the third coupler 41.

[0210] The second switching circuit 44 is used to select the third passive circuit 42 to be connected to the first terminal 11 according to the second control signal, or to select the fourth passive circuit 43 to be connected to the first terminal 11 according to the second control signal.

[0211] The second control signal can be output, for example, by the controller in the communication device 1. The controller can output the corresponding second control signal based on the source node and destination node obtained.

[0212] The structure of the second switching circuit 44 can be the same as that of the first switching circuit 23, and the control process of the second switching circuit 44 can also be the same as that of the first switching circuit 23.

[0213] In this example, if the structure of the first channel 20 is different from that of the second channel 40 (e.g., the structure of each component, the coupling relationship between the components), the first end 11 and the second end 12 of the first coupler 10 can be distinguished by judging the circuit structure of the port coupling of the first coupler 10. If the structure of the first channel 20 is the same as that of the second channel 40, then any one of the multiple ports of the first coupler 10 may serve as either the first end 11 or the second end 12.

[0214] When the communication device 1 provided in this application embodiment is applied to a communication system, the communication system can realize signal transmission through three transmission paths. That is, it can realize the third device 300 sending signals to the second device 200, the second device 200 sending signals to the third device 300, and the second device 200 sending signals to each other.

[0215] The communication process of the communication device 1 provided in this application embodiment will be illustrated below with reference to the communication control method provided in the embodiments of this application.

[0216] The communication control method provided in this application includes:

[0217] Using the third device 300 as the source node and the second device 200 as the destination node, the communication signal flows from the side where the third coupler 41 is located to the side where the second coupler 30 is located.

[0218] For example, the third coupler 41 receives the communication signal sent by the third device 300 and couples the communication signal to the first coupler 10. The first coupler receives the communication signal and outputs the communication signal through the second coupler 30.

[0219] The third coupler 41 is connected to the third device 300 via the second cable 500, and the communication signal output by the third device 300 can be transmitted to the third coupler 41.

[0220] The third coupler 41 transmits the communication signal to the first coupler 10 via the second channel 40. In the second channel 40, the bolded portion represents the current loop path from the third coupler 41 to the first coupler 10. Under the control of the second control signal, the switching switch in the second switching circuit 44 is in the closed state O, and the switching switch is coupled to the fourth passive circuit 43. The impedance of the entire current loop is relatively low, constituting a normal loop. Therefore, most of the signal power transmitted by the third coupler 41 is transmitted to the first coupler 10.

[0221] Figure 6 The example below uses the nth end node EPn as the destination node. The process of the first coupler 10 receiving the communication signal and outputting it through the second coupler 30 is the same as in Example 1, and will not be repeated here.

[0222] The communication control method provided in this application embodiment also includes:

[0223] The second device 200 acts as the source node, and the third device 300 acts as the destination node. The communication signal flows from the side where the second coupler 30 is located to the side where the third coupler 41 is located.

[0224] Figure 6 The example shown uses the nth end node EPn as the source node. The process of the second coupler 30 receiving the communication signal and transmitting it to the first coupler 10 is the same as in Example 2, and will not be repeated here.

[0225] Please continue to refer to this. Figure 6 The first coupler 10 transmits the communication signal to the third coupler 41 via the second channel 40. The bolded portion of the second channel 40 represents the current loop path from the first coupler 10 to the third coupler 41. Under the control of the second control signal, the switch in the second switching circuit 44 is in the closed state O, and the switch is coupled to the fourth passive circuit 43. The impedance of the entire current loop is relatively small, constituting a normal loop. Therefore, most of the signal power transmitted by the first coupler 10 is transmitted to the third coupler 41. The third coupler 41 is connected to the third device 300 via the second cable 500 to receive the communication signal transmitted by the second device 200.

[0226] The communication control method provided in this application embodiment also includes:

[0227] A second device 200 acts as a source node, and another second device 200 acts as a destination node. Communication signals flow from the side where the second coupler 30 is located to the side where the second coupler 30 is located.

[0228] One of the multiple second couplers 30 receives a communication signal, and another of the multiple second couplers 30 outputs a communication signal. The controller acquires a first channel 20 for connecting the source node and a first channel 20 for connecting the destination node.

[0229] The controller acquires the correspondence between the second coupler 30 used for coupling to the source node and the second coupler 30 used for coupling to the destination node and the first channel 20, and determines the first communication channel 20. The controller sends a second control signal to the second channel 40 to control the second switching circuit 44 to select the communication signal to be transmitted through the third passive circuit 42.

[0230] Figure 7 The example uses the nth end node EPn as the source node and the second end node EP2 as the destination node.

[0231] The second coupler 30 corresponding to the source node receives the communication signal, which is transmitted via the first channel 20 to the second terminal 12 of the first coupler 10 (referred to as the nth second terminal 12 in this document). At this time, the first channel 20 serves as the first channel 20 in active communication, and the communication signal flows through the second branch 22 to the first coupler 10. The control process of the first channel 20 can be referred to the above description of the control process of the first channel 20 in active communication.

[0232] The nth second terminal 12 is magnetically coupled to the second second terminal 12 (the second terminal 12 coupled to the second terminal node EP2), coupling the communication signal to the first channel 20 coupled to the second second terminal 12. At this time, the first channel 20 serves as the first channel 20 in communication, and the communication signal flows through the second branch 22 to the second coupler 30 (the second coupler 30 corresponding to the second terminal node EP2). The control process of the first channel 20 can be referred to the above description of the control process of the first channel 20 in communication.

[0233] The first channel 20 corresponding to other terminal nodes is a non-communication first channel 20. Its current loop impedance is relatively high, and the signal power transmitted by the nth second terminal 12 is almost entirely not transmitted to the non-communication first channel 20, resulting in minimal power waste. The control process for the non-communication first channel 20 can be found in the description above.

[0234] Meanwhile, the communication signal does not need to flow through the second channel 40. The bolded portion of the second channel 40 indicates the current loop path of the second channel 40. Under the control of the second control signal, the switching switch in the second switching circuit 44 is in the open state F. The switching switch is coupled to the third passive circuit 42. The current flows through the high-impedance third passive circuit 42, and the impedance of the entire current loop is relatively large, making it a high-impedance loop. Therefore, the signal power transmitted at the nth second terminal 12 is almost not transmitted to the third coupler 41, resulting in minimal power waste.

[0235] The communication device 1 provided in this application embodiment, by incorporating a third coupler 41, a third passive circuit 42, a fourth passive circuit 43, and a second selection circuit 44, enables the communication device 1 to transmit signals from the first coupler 10 side to the second coupler 30 side, and from the second coupler 30 side to the first coupler 10 side. Furthermore, the communication device 1 also has the energy to transmit signals from one second coupler 30 side to another. Moreover, the first channel 20 includes a first branch 21 and a second branch 22 with different impedances. By adjusting the flow path of the communication signal, the first channel 20 connected to the source node or destination node can have a smaller impedance, while the first channel 20 not connected to the source node or destination node can have a larger impedance. The second channel 40 includes a third passive circuit 42 and a fourth passive circuit 43 with different impedances. By adjusting the flow path of the communication signal, the second channel 40 can have a smaller impedance when the communication signal flows through the third coupler 41, and a larger impedance when the communication signal does not flow through the third coupler 41. In this way, when communication device 1 communicates, the communication loop is always a normal loop, and other branches are always high-impedance loops, so as to ensure that the signal power in the communication path is always maximized, which can improve the transmission rate.

[0236] Example 4

[0237] Example 4 has the same communication system architecture as Example 1, the main difference being the structure of the communication device 1 in the first device 100.

[0238] This application provides a communication system, which includes a first device 100, a plurality of second devices 200 and a third device 300.

[0239] The coupling relationship between the first device 100, the second device 200, and the third device 300 can be referred to the relevant description in Example 1, and will not be repeated here.

[0240] Regarding the structure of the communication device 1, in some embodiments, the communication device 1 adopts a single-input single-output (SISO) data transmission mode.

[0241] like Figure 8As shown, the communication device 1 includes a channel group, which includes a first coupler 10, a plurality of first channels 20, and a plurality of second couplers 30.

[0242] The first coupler 10 includes a first terminal 11 and a second terminal 12, and also includes a third terminal 13, with a fifth passive circuit connected in series at the third terminal 13.

[0243] The fifth passive circuit may include passive components such as capacitors, resistors, inductors, and ferrite beads. Figure 8 The fifth passive circuit, including resistor R, is illustrated as an example.

[0244] For example, the first coupler 10 is a combiner used to convert a single signal into multiple signals. For instance, the first coupler 10 includes a first coil L1, multiple second coils L2, and a third coil L3. The two ends of the first coil L1 are coupled to the first terminal 11 of the first combiner 10, the two ends of the second coils L2 are coupled to the second terminal 12 of the first combiner 10, and the two ends of the third coil L3 are coupled to the third terminal 13 of the first combiner 10. The first coil L1 and the second coils L2 are magnetically coupled, the first coil L1 and the third coil L3 are magnetically coupled, and the second coils L2 and the third coil L3 are magnetically coupled. The multiple second coils L2 can also be electromagnetically coupled to each other.

[0245] like Figure 8 As shown, resistors R are connected in series to the two ends of the third coil L3, and the two ends of the first coil L1 are coupled to the signal line.

[0246] The structure of the first channel 20 can be the same as in Example 1, and will not be described again here.

[0247] When the communication device 1 is applied to the communication system, the first coil L1 is coupled to the transmitting unit TX in the third device 300, and the third coil L3 is coupled to the receiving unit RX of the third device 300 through the resistor R.

[0248] The communication control method provided in the embodiments of this application will be illustrated below.

[0249] This application provides a communication control method, which can be applied, for example, to the communication device 1 described above.

[0250] Communication control methods, including:

[0251] Using the third device 300 as the source node and the second device 200 as the destination node, the communication signal flows from the side where the first coupler 10 is located to the side where the second coupler 30 is located.

[0252] The transmitting unit TX in the third device 300 sends a communication signal, which is transmitted to the communication device 1 via the second cable 500. The first coupler 10 couples the communication signal to each of the second couplers 30, and the second couplers 30 then transmit the communication signal to the second device 200 via the first cable 400 to complete the signal transmission. During the process of the communication signal on the first coil L1 being coupled to the second coil L2, the resistor connected in series with the third coil L3 makes the channel where the third coil L3 is located a high-resistance channel, preventing signal flow.

[0253] Using one second device 200 as the source node and another second device 200 as the destination node, the communication signal flows from the side where the second coupler 30 is located to the side where the second coupler 30 is located. Refer to the relevant description in Example 1; it will not be repeated here.

[0254] Using the second device 200 as the source node and the third device 300 as the destination node, the communication signal flows from the side where the second coupler 30 is located to the side where the first coupler 10 is located.

[0255] The communication signal sent by the second device 200 is coupled to the second coil L2 of the first coupler 10. The second coil L2 is magnetically coupled to the third coil L3, transmitting the communication signal to the receiving unit RX of the third device 300. At this time, the transmitting unit TX in the third device 300 is in a high-impedance state, allowing the communication signal to flow.

[0256] Figure 8 The example uses the nth end node EPn as the source node. The first channel 20 corresponding to the nth end node EPn is the active communication channel 20, while the first channels 20 corresponding to other end nodes are not in communication. The control process can be referenced in Example 3. Figure 7 Related descriptions.

[0257] Example 5

[0258] The main difference between Example 5 and Examples 1 to 3 is that the communication device 1 adopts a multiple-input multiple-output (MIMO) data transmission mode, and the communication device 1 includes two sets of channel groups.

[0259] This application provides a communication system, which includes a first device 100, a plurality of second devices 200 and a third device 300.

[0260] The coupling relationship between the first device 100, the second device 200, and the third device 300 can be referred to the relevant description in Example 1, and will not be repeated here.

[0261] The first device 100 includes the communication device 1 provided in the embodiments of this application. The communication device 1 redistributes the signal power on the communication path to improve the transmission rate of the second device 200 that is communicating.

[0262] Regarding the structure of the communication device 1, in some embodiments, the communication device 1 adopts a multiple-input multiple-output (MIMO) data transmission mode.

[0263] like Figure 9A As shown, the communication device 1 includes two parallel channel groups, the structure of which can be any of the channel groups illustrated in Examples 1 to 3. When the communication device 1 is applied to a communication system, the second device 200 is coupled to both channel groups, and the third device is also coupled to both channel groups.

[0264] For example, such as Figure 9B As shown, the structure of the channel group is Figure 6 The channel group shown. Figure 9B The diagram illustrates the structure of the communication device 1 and its coupling relationship with the second device 200 and the third device 300.

[0265] Of course, each second device 200 can be coupled to both channel groups, but this embodiment does not limit which port in the channel group the second device 200 is coupled to. Figure 9B The correspondence in the diagram is for illustrative purposes only and is not intended to impose any limitations.

[0266] The communication device 1 provided in this application embodiment is applicable not only to the single-input single-output (SISO) data transmission mode, but also to the multiple-input multiple-output (MIMO) data transmission mode, and has a wide range of applications.

[0267] Example 6

[0268] The main difference between this example and Examples 1 through 5 is that in this example, the first device 100 and the third device 300 are integrated into the same device, instead of the first device 100 being coupled to the third device 300 via the second cable 500.

[0269] This application provides a communication system, which includes a first device 100 and a plurality of second devices 200, wherein the first device 100 is coupled to the plurality of second devices 200.

[0270] like Figure 10A As shown, the first device 100 acts as the master node, and the second device 200 acts as the slave node. That is to say, the communication device 1 is integrated into the master node.

[0271] Or, such as Figure 10BAs shown, the first device 100 acts as a slave node, one of the second devices 200 acts as a master node, and the others in the second devices 200 act as slave nodes. That is to say, the communication device 1 is integrated into the slave node.

[0272] In other words, the multiple second devices 200 in this application embodiment can all be slave nodes, or one of them can be the master node and the others are slave nodes.

[0273] For example, such as Figure 11A As shown, the first device 100 is the domain administrator (DM), and the second device 200 is the end node (EP). The communication device 1 provided in this embodiment is integrated within the domain administrator (DM).

[0274] Or, for example, Figure 11B As shown, the first device 100 is an end node EP (first end node EP1), one of the second devices 200 is a domain manager DM, and the others in the second devices 200 are end nodes EP (second end node EP2-nth end node EPn).

[0275] Of course, in this example, communication device 1 can be any of the communication devices 1 shown in Examples 1 to 5. Figure 11A and Figure 11B This is for illustrative purposes only and is not intended to impose any limitations.

[0276] In some embodiments, the controller may be integrated into a communication chip in the first device 100.

[0277] The communication device 1 is integrated into the first device 100, which simplifies the architecture of the communication system.

[0278] Example 7

[0279] In this example, the structure of the communication system is the same as that of Examples 1 to 6, but the structure of communication device 1 is different.

[0280] This application provides a communication system, which can be... Figure 3 , Figure 9A or Figure 10A The communication system shown can be referenced and Figure 3 , Figure 9A or Figure 10A The relevant descriptions will not be repeated here.

[0281] The first device 100 in the communication system includes the communication device 1 provided in the embodiments of this application, such as... Figure 12As shown, the communication device 1 includes a channel group. The channel group includes a first coupler 10, a third channel 27, a fourth channel 28, and a plurality of second couplers 30. The impedance of the third channel 27 is greater than the impedance of the fourth channel 28. Alternatively, the inductive reactance of the third channel 27 is greater than the inductive reactance of the fourth channel 28.

[0282] The structure of the first coupler 10 can be the same as that shown in Example 1. For example, the first coupler 10 includes a first end 11 and a plurality of second ends 12.

[0283] The third channel 27 is coupled between the second end 12 and the second coupler 30, and the fourth channel 28 is coupled between the second end 12 and the second coupler 30. The third channel 27 and the fourth channel 28 are arranged side by side, and the second end 12 and the second coupler 30 coupled to the third channel 27 are different from those coupled to the fourth channel 28.

[0284] Of course, communication device 1 may include one or more third channels 27, and communication device 1 may also include one or more fourth channels 28. Figure 12 The illustration only takes the communication device 1, which includes multiple third channels 27 and a fourth channel 28, as an example.

[0285] In some embodiments, such as Figure 12 As shown, the third channel 27 includes a sixth passive circuit, and the fourth channel 28 includes a signal line. The impedance of the sixth passive circuit is greater than the impedance of the signal line.

[0286] For example, the sixth passive circuit includes passive components such as capacitors, inductors, resistors, and ferrite beads.

[0287] In some embodiments, the fourth channel 28 may also include a sixth passive circuit, provided that the impedance of the sixth passive circuit is greater than the impedance of the sixth passive circuit.

[0288] In other embodiments, the inductive reactance of the sixth passive circuit is greater than that of the sixth passive circuit.

[0289] The communication device 1 provided in this example includes a third channel 27 and a fourth channel 28. However, the impedances of the third channel 27 and the fourth channel 28 are not equal, so the signal power allocated to the third channel 27 and the fourth channel 28 is also not equal. With a fixed transmit power, the fourth channel 28, which has a lower impedance, receives a greater signal power than the third channel 27, which has a higher impedance, thus achieving a fixed signal power allocation. This improves the signal transmission rate on the fourth channel 28.

[0290] In some embodiments, such as Figure 13As shown, the channel group also includes a third coupler 41, which is coupled to the first end 11 of the first coupler 10.

[0291] The structure of the third coupler 41 can be the same as that of the third coupler 41 shown in Example 2.

[0292] By setting a third coupler 41 in the communication device 1, it is possible not only to transmit communication signals from the side where the first coupler 10 is located to the side where the second coupler 30 is located, but also to transmit communication signals from the side where the second coupler 30 is located to the side where the first coupler 10 is located, thus broadening the application scenarios of the communication device 1.

[0293] In some embodiments, the communication device 1 includes two parallel channels as described above, so that the communication device 1 is applicable not only to the single-input single-output (SISO) data transmission mode, but also to the multiple-input multiple-output (MIMO) data transmission mode, thus having a wide range of applications.

[0294] In some embodiments, such as Figure 14 As shown, communication device 1 can also be integrated into the domain administrator DM.

[0295] The application scenario of the communication device 1 provided in this example can be the same as that of the communication device 1 provided in Examples 1 to 6. Simply replace the communication device 1 provided in Examples 1 to 6 with the communication device 1 provided in this example. Further details will not be provided here.

[0296] This application also provides a computer-readable storage medium storing computer program code, which, when executed on a computer, causes the computer to perform the aforementioned communication control method.

[0297] This application also provides a computer program product that, when run on a computer, causes the computer to execute the above-described communication control method.

[0298] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A communication device, characterized in that, include: Channel group; The channel group includes a first coupler, a plurality of first channels, and a plurality of second couplers; The first coupler includes a first end and a plurality of second ends; One end of each of the plurality of first channels is coupled to one of the plurality of second ends, and the other end of each of the plurality of first channels is coupled to one of the plurality of second couplers. The first channel includes a first branch and a second branch, wherein the impedance of the first branch is greater than the impedance of the second branch; the first channel is used to select whether to transmit the communication signal transmitted by the communication device via the first branch or via the second branch.

2. The communication device according to claim 1, characterized in that, The inductive reactance of the first branch is greater than that of the second branch.

3. The communication device according to claim 1, characterized in that, The resistance of the first branch is greater than the resistance of the second branch.

4. The communication device according to claim 1, characterized in that, The first branch includes a first passive circuit; the second branch includes a second passive circuit; the first channel further includes a first switching circuit; The first passive circuit and the second passive circuit are connected in parallel and in series with the first switching circuit; the impedance of the first passive circuit is greater than the impedance of the second passive circuit. The first switching circuit is used to select the first passive circuit to be connected to the second coupler according to the first control signal, or to select the second passive circuit to be connected to the second coupler according to the first control signal.

5. The communication device according to claim 4, characterized in that, The communication device further includes a controller, which is used to output the first control signal.

6. The communication device according to claim 4, characterized in that, The first passive circuit includes at least one of a resistor, a capacitor, an inductor, or a ferrite bead.

7. The communication device according to claim 4, characterized in that, The second passive circuit includes signal lines.

8. The communication device according to any one of claims 1-7, characterized in that, The channel group further includes a second channel, which includes a third coupler; the third coupler is coupled to the first end.

9. The communication device according to claim 8, characterized in that, The second channel also includes a third passive circuit, a fourth passive circuit, and a second switching circuit; The third passive circuit and the fourth passive circuit are connected in parallel and coupled in series with the second switching circuit between the third coupler and the first terminal; the impedance of the third passive circuit is greater than the impedance of the fourth passive circuit. The second switching circuit is used to select the third passive circuit to connect with the first terminal according to the second control signal, or to select the fourth passive circuit to connect with the first terminal according to the second control signal.

10. The communication device according to any one of claims 1-7, characterized in that, The first coupler also includes a third terminal; the third terminal is coupled in series with a fifth passive circuit.

11. The communication device according to any one of claims 1-7, characterized in that, The communication device includes two parallel channel groups.

12. The communication device according to any one of claims 1-7, characterized in that, The communication device is integrated into the end node EP device, the tail node STA device, the domain administrator DM device, or the central coordinator CCO device.

13. A communication device, characterized in that, Including channel groups; The channel group includes a first coupler, a third channel, a fourth channel, and multiple second couplers; The first coupler includes a first end and a plurality of second ends; The third channel is coupled between the second end and the second coupler; the fourth channel is coupled between the second end and the second coupler; the second end and the second coupler coupled with the third channel are different from each other; The impedance of the third channel is greater than the impedance of the fourth channel.

14. The communication device according to claim 13, characterized in that, The third channel includes a sixth passive circuit, the fourth channel includes a signal line, the impedance of the sixth passive circuit is greater than the impedance of the signal line, or the impedance of the sixth passive circuit is greater than the impedance of the signal line.

15. The communication device according to claim 13 or 14, characterized in that, The channel group also includes a third coupler; the third coupler is coupled to the first end.

16. A communication system, characterized in that, The communication system includes a first device and a plurality of second devices, the plurality of second devices being coupled to the first device via a first cable; the first device includes a communication device, the communication device being the communication device as described in any one of claims 1-15.

17. The communication system according to claim 16, characterized in that, The communication system also includes a third device, which is coupled to the first device via a second cable.

18. The communication system according to claim 16, characterized in that, The communication device includes two parallel channel groups; The second device is coupled to the first device via two of the first cables.

19. A communication control method, characterized in that, The invention is applied in a communication device, wherein the communication device comprises the communication device according to any one of claims 1-12; The communication control method includes: The communication signals transmitted and received by the communication device are transmitted through the first channel; the first channel not used to connect the source node or the destination node selects to transmit the communication signals through the first branch; the first channel used to connect the source node or the destination node selects to transmit the communication signals through the second branch.

20. The communication control method according to claim 19, characterized in that, The communication control method further includes: the communication signal being transmitted via a second channel; the second channel selecting, according to a second control signal, the communication signal to be transmitted via a third passive circuit, or selecting, according to the second control signal, the communication signal to be transmitted via a fourth passive circuit.

21. The communication control method according to claim 20, characterized in that, When the second channel is used to connect a source node or a destination node, the second control signal sent by the controller to the second channel controls the second switching circuit to select the communication signal to be transmitted through the fourth passive circuit; When the second channel is not used to connect the source node or the destination node, the controller sends a second control signal to the second channel to control the second switching circuit to select the communication signal to be transmitted through the third passive circuit.

22. The communication control method according to any one of claims 19-21, characterized in that, The communication control method also includes: The first coupler receives the communication signal sent by the source node, and one of the multiple second couplers outputs the communication signal to the destination node; the first channel for connecting to the destination node is obtained.

23. The communication control method according to any one of claims 19-21, characterized in that, The communication control method further includes: One of a plurality of second couplers receives the communication signal sent by the source node; the first coupler outputs the communication signal to the destination node; The controller acquires the first channel used to connect to the source node.

24. The communication control method according to claim 23, characterized in that, The controller listens for signal frames to obtain the first channel used to connect to the source node.

25. The communication control method according to any one of claims 19-21, characterized in that, The communication control method further includes: One of the plurality of second couplers receives the communication signal, and another of the plurality of second couplers outputs the communication signal; The controller acquires the first channel for connecting to the source node and the first channel for connecting to the destination node.

26. The communication control method according to claim 25, characterized in that, The controller listens for signal frames and acquires the first channel for connecting to the source node and the first channel for connecting to the destination node.

27. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes computer instructions that, when executed on the device, cause the device to perform the communication control method as described in any one of claims 19-26.

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