Bus switching node and communication network

Abstract

The invention provides a bus switching node and a communication network, and relates to the technical field of bus switching. In the bus switching node, the switching matrix is used for being controlled to communicate the corresponding interfaces on the two sides of the bus switching node, so that the bus switching node can realize communication between equipment connected with the two sides of the bus switching node. Each interface of the first end of the switching matrix is connected with the interface of the first end of the bus switching node through the first repeater in a one-to-one correspondence manner, so that signals sent by equipment connected with two sides of the bus switching node can pass through the repeaters. The repeater has signal amplification and signal regeneration functions, so that when the communication distance between the devices connected to the two sides of the bus switching node is relatively long, the communication quality between the devices connected to the two sides of the bus switching node can be ensured; therefore, the bus switching node prolongs the communication distance between the devices connected to the two sides of the bus switching node.

Description

Technical Field

[0001] The present invention relates to the technical field of bus switching, and in particular to a bus switching node and a communication network. Background Art

[0002] In order to improve test efficiency and speed up test progress during the ground test phase of the aircraft system, multiple sets of airborne equipment are usually used for test personnel to conduct full-aircraft system testing. Therefore, during the test verification process, multiple sets of airborne equipment need to be switched to meet the different test needs of different test personnel.

[0003] Currently, bus switching nodes are used to switch between multiple onboard devices. However, if the devices connected to the bus switching nodes are far apart, communication quality may be poor, resulting in packet loss, which limits the communication distance between the devices connected on both sides of the bus switching node.

[0004] Therefore, how to extend the communication distance between devices connected on both sides of a bus switching node is a technical problem that needs to be solved urgently. Summary of the Invention

[0005] In view of this, the present invention provides a bus switch node and a communication network to extend the communication distance between devices connected to both sides of the bus switch node.

[0006] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0007] On one hand, the present application provides a bus switching node, comprising: a switching matrix, a control module, and at least two first repeaters; wherein:

[0008] Each interface at the first end of the switching matrix is connected to an interface at the first end of the bus switching node in a one-to-one correspondence via the first repeater corresponding to the first repeater;

[0009] Each interface at the second end of the switching matrix is connected to an interface at the second end of the bus switching node in a one-to-one correspondence;

[0010] The switching matrix is controlled by the control module, and the control module is connected to the host computer;

[0011] The switching matrix is controlled to connect corresponding interfaces on both sides thereof.

[0012] Optionally, the control module is used to read the ID value and total number of nodes of each node connected to the target communication bus from the target communication bus, and send the reading result to the host computer; the target communication bus is the communication bus to which the bus switching node is connected.

[0013] Optionally, the control module is further configured to read the IP address of the bus switching node from the target communication bus.

[0014] Optionally, the system further includes: at least two second repeaters; wherein:

[0015] Each interface at the second end of the switching matrix is connected to an interface at the second end of the bus switching node in a one-to-one correspondence through a second repeater corresponding to the repeater.

[0016] Optionally, it further includes: at least two switches; wherein:

[0017] Each repeater in the bus switching node is connected in parallel with one of the switches;

[0018] All the switches are controlled by the control module.

[0019] Optionally, the first end of the bus switch node is a ring network end, and the second end of the bus switch node is a real device end;

[0020] or,

[0021] The first end of the bus switch node is a real device end, and the second end of the bus switch node is a ring network end.

[0022] Optionally, the switching matrix includes: at least two first multi-position switching switches and at least two second multi-position switching switches; wherein:

[0023] A single interface side of each of the first multi-position switching switches is connected to an interface of the ring network end of the switching matrix in a one-to-one correspondence;

[0024] A single interface side of each second multi-position switch is connected to an interface on the real side of the switching matrix in a one-to-one correspondence;

[0025] Each interface on the multi-interface side of each first multi-position switch is connected to each interface on the multi-interface side of each second multi-position switch in a one-to-one correspondence.

[0026] Another aspect of the present application provides a communication network, comprising: at least two bus switching nodes as described in any one of the previous aspects of the present application; wherein:

[0027] Among all the bus switching nodes, every two bus switching nodes form a group;

[0028] In each group, each interface of the ring network end of one bus switching node is connected to an interface of the ring network end of another bus switching node in a one-to-one correspondence;

[0029] Each interface of the real end of each bus switching node is connected to a real node corresponding to the interface.

[0030] Optionally, in each group, the real nodes connected to the real ends of the two bus switching nodes are devices in two different systems.

[0031] Optionally, each interface of the physical end of each bus switching node is connected to the corresponding physical node via a 1394B bus;

[0032] In each group, each interface of the ring network end of one bus switching node is connected to an interface of the ring network end of another bus switching node in a one-to-one correspondence via the 1394B bus.

[0033] As can be seen from the above technical solution, the present invention provides a bus switching node. In this bus switching node, because the switching matrix is used to control the corresponding interfaces on both sides of the bus switching node, the bus switching node can achieve communication between the devices connected on both sides. Moreover, because each interface at the first end of the switching matrix is connected to the interface at the first end of the bus switching node in a one-to-one correspondence via a first repeater, signals transmitted by the devices connected on both sides of the bus switching node can all pass through the repeater. Furthermore, because the repeater has signal amplification and signal regeneration functions, the communication quality between the devices connected on both sides of the bus switching node can be guaranteed even when the communication distance between the devices connected on both sides of the bus switching node is long. Therefore, the bus switching node extends the communication distance between the devices connected on both sides of the bus switching node. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0035] Figure 1-Figure 5 These are structural diagrams of five implementation schemes of bus switching nodes provided in the embodiments of the present application;

[0036] Figure 6-Figure 9 Schematic diagrams of the structures of four implementation modes of the connection topology provided in the embodiments of the present application;

[0037] Figure 10 This is a schematic structural diagram of an implementation of the switching matrix provided in this embodiment. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0039] In this application, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0040] In order to extend the communication distance between the devices connected on both sides of the bus switch node, another embodiment of the present application provides a bus switch node, the specific structure of which is as follows: Figure 1 As shown, it specifically includes: a switching matrix 10, a control module 20 and at least two first repeaters 30. The connection relationship between each component is as follows:

[0041] Each interface at the first end of the switching matrix 10 is connected to an interface at the first end of the bus switching node via a first repeater 30 corresponding to the first repeater 30. Each interface at the second end of the switching matrix 10 is connected to an interface at the second end of the bus switching node in a one-to-one correspondence.

[0042] For example, the first end and the second end of the switching matrix 10 each include two interfaces. Figure 1 As shown, the first interface of the first end of the switching matrix 10 is connected to the first interface of the first end of the bus switching node through the first first repeater 30, the second interface of the first end of the switching matrix 10 is connected to the second interface of the first end of the bus switching node through the second first repeater 30, the first interface of the second end of the switching matrix 10 is connected to the first interface of the second end of the bus switching node, and the second interface of the second end of the switching matrix 10 is connected to the second interface of the second end of the bus switching node.

[0043] It should be noted that the first repeater 30 is a very mature device in the prior art, and its specific structure and function will not be described in detail here.

[0044] The switching matrix 10 is controlled by a control module 20, which is connected to a host computer. The switching matrix 10 is controlled to connect corresponding interfaces on both sides of the matrix. Specifically, the control module 20 controls the switching matrix 10 to connect corresponding interfaces on both sides of the matrix based on received command signals.

[0045] For example, Figure 1 Taking the bus switching node shown as an example, if the instruction signal received by the control module 20 is to connect the first interface of the first end of the bus switching node with the second interface of the second end of the bus switching node, the control module 20 controls the switching matrix 10 to connect the first interface of its own first end with the second interface of its own second end.

[0046] For example, Figure 1 Taking the bus switching node shown as an example, if the instruction signal received by the control module 20 is to connect the first interface of the first end of the bus switching node to the first interface of the second end of the bus switching node, and to connect the second interface of the first end of the bus switching node to the second interface of the second end of the bus switching node, the control module 20 controls the switching matrix 10 to connect the first interface of its own first end to the first interface of its own second end, and to connect the second interface of its own first end to the second interface of its own second end.

[0047] In actual applications, bus switching nodes use the standard Ethernet UDP protocol for transmission. The interactive data is placed in the UDP message as the UDP payload, and data interaction is carried out according to the specified register format.

[0048] It should be noted that the control module 20 is connected to the host computer via Ethernet, or via an Ethernet switch. The host computer software issues control instructions to the switch matrix 10, writes values into specified registers, and issues them, thereby controlling the operating state of the switch matrix 10.

[0049] In addition, it should be noted that the method for the control module 20 to control the switching matrix 10 is already very mature in the prior art and will not be described in detail here.

[0050] Because the switching matrix 10 is controlled to connect corresponding interfaces on both sides of the bus switching node, the bus switching node can achieve communication between the devices connected to it. Furthermore, because each interface on the first end of the switching matrix 10 is connected to an interface on the first end of the bus switching node via a first repeater 30, signals transmitted by devices connected to both sides of the bus switching node can pass through the repeater. Furthermore, because the repeater has signal amplification and regeneration functions, the communication quality between the devices connected on both sides of the bus switching node can be guaranteed even when the communication distance between the devices is long. Therefore, the bus switching node extends the communication distance between the devices connected on both sides of the bus switching node.

[0051] Another embodiment of the present application also provides two other implementations of the bus switch node. The first implementation provided by this embodiment differs from the implementation provided by the above embodiment in that:

[0052] In this embodiment, if Figure 2 As shown, the first end of the bus switching node is a ring network end 40, and the second end of the bus switching node is a real device end 50. The ring network end 40 of the bus switching node is used to connect to the ring network end 40 of another bus switching node, and each interface of the real device end 50 of the bus switching node is used to connect to a real device node.

[0053] The second implementation provided in this embodiment differs from the implementation provided in the above embodiment in that:

[0054] In this embodiment, if Figure 3 As shown, the first end of the bus switch node is the real terminal 50, and the second end of the bus switch node is the ring network terminal 40. The ring network terminal 40 and the real terminal 50 of the bus switch node have been described in detail above and will not be repeated here.

[0055] The above are only two implementations of the first repeater 30, which are not specifically limited here and can be determined according to specific circumstances, and are all within the scope of protection of this application.

[0056] Another embodiment of the present application also provides another implementation of the bus switch node, the specific structure of which is as follows: Figure 4 As shown, this embodiment, based on the embodiment provided in the above embodiment, further includes: at least two second repeaters 40. The connection relationship between the various components is specifically described as follows:

[0057] Each interface at the second end of the switching matrix 10 is connected to an interface at the second end of the bus switching node in a one-to-one correspondence through a second repeater 40 corresponding to the second repeater 40 .

[0058] For example, the second end of the switching matrix 10 includes two interfaces. Figure 4 As shown, the first interface of the second end of the switching matrix 10 is connected to the first interface of the second end of the bus switching node through the first second repeater 40, and the second interface of the second end of the switching matrix 10 is connected to the second interface of the second end of the bus switching node through the second second repeater 40.

[0059] It should be noted that the second repeater 40 is a very mature device in the prior art, and its specific structure and function will not be described in detail here.

[0060] In this embodiment, by adding the second repeater 40 , the bus switch node can be applied to more complex scenarios, thereby broadening the scope of use of the bus switch node.

[0061] The above is only one implementation of the bus switching node. In practical applications, including but not limited to this, no specific limitation is made here and it can be determined according to specific circumstances, all of which are within the scope of protection of this application.

[0062] Another embodiment of the present application provides another implementation of the bus switch node, and its specific structure is as follows: Figure 5 As shown, this embodiment, based on the embodiment provided in the above embodiment, further includes: at least two switches 70. The connection relationship between the various components is specifically described as follows:

[0063] Each repeater in the bus switching node is connected in parallel with a switch 70 . All switches 70 are controlled by the control module 20 .

[0064] For example, Figure 2 As an example, the bus switching node shown in Figure 5 As shown, the first switch 70 is connected in parallel to both ends of the first first repeater 30 , and the second switch 70 is connected in parallel to both ends of the second first repeater 30 . Both switches 70 are controlled by a controller.

[0065] When the control module 20 receives a signal indicating that the devices connected on both sides of the bus switching node are relatively close to each other, the control module 20 controls all switches 70 to be turned on, short-circuiting all repeaters so that the repeaters do not participate in communication. When the control module 20 receives a signal indicating that the devices connected on both sides of the bus switching node are relatively far apart, the control module 20 controls all switches 70 to be turned off, unshorting all repeaters so that the repeaters participate in communication.

[0066] Optionally, each switch 70 may be a mechanical switch or an electronic switch, which is not specifically limited here and may be determined according to specific circumstances, and is within the scope of protection of this application.

[0067] Optionally, the electronic switch may be a MOS tube or an IGBT. In practical applications, including but not limited to these, no specific limitation is made here and it may depend on the specific circumstances, all of which are within the scope of protection of this application.

[0068] In this embodiment, by controlling the on and off of the switch 70, it is possible to control whether the repeater participates in the communication. Therefore, when the devices connected on both sides of the bus switching node are close to each other, the repeater is prevented from participating in the communication, thereby saving the power consumption of the bus switching node and achieving the purpose of energy saving.

[0069] Another embodiment of the present application provides another implementation of a bus switch node. The difference between this implementation and the bus switch node is as follows:

[0070] In this embodiment, the control module 20 is used to read the ID value and total number of nodes of each node connected to the target communication bus from the target communication bus, and send the ID value and total number of nodes of each node connected to the target communication bus to the host computer.

[0071] The target communication bus is the communication bus to which the bus switch node is connected. In addition, a node can represent a device or equipment. For example, a node can represent a bus switch node or a device connected to the bus switch node.

[0072] In actual applications, the control module 20 combines its own IP and the ID value and total number of nodes connected to the target communication bus as the UDP payload into an Ethernet message, and then sends it to the host computer through the Ethernet interface. The host computer identifies the IP of the corresponding control module 20 and the ID value and total number of nodes connected to the target communication bus through the topology display software.

[0073] The host computer constructs the target communication bus's connection topology based on the ID value of each node connected to the target communication bus and the total number of nodes. In other words, each node displays its own ID value in the connection topology. Furthermore, if the constructed connection topology is missing certain nodes, it indicates that these nodes are malfunctioning.

[0074] It should be noted that how to construct the connection topology of the target communication bus is the same as that in the prior art and will not be described in detail here.

[0075] Taking two bus switching nodes connected via respective ring network terminals 40 and a device connected to the real terminal 50 of each bus switching node as an example, the connection topology is described in detail. Figure 6 As shown:

[0076] Figure 6 (a) shows the connection topology when both bus switching nodes and the nodes they are connected to are not faulty. Figure 6Figure (b) shows the connection topology of a bus switch node connected to a faulty node. Node ID 2 is the first bus switch node, or switch node 1, and node ID 3 is the device connected to the first bus switch node. Node ID 1 is the second bus switch node, or switch node 2, and node ID 0 is the device connected to the second bus switch node.

[0077] Will Figure 6 Comparing (a) and (b), we can see that there is no node with ID 3 in (b), which indicates that the node with ID 3 has failed.

[0078] Taking six bus switching nodes connected through their respective ring network terminals 40 and each bus switching node having at least one device connected to its real terminal 50 as an example, the connection topology is described in detail. Figure 7 As shown:

[0079] There are 24 nodes with IDs from 0 to 23. Node 17 is the first bus switching node, or switching node 1. This first bus switching node is connected to node 13 via nodes 16, 15, and 14. Node 18 is the second bus switching node, or switching node 2. This second bus switching node is connected to node 23 via nodes 19, 20, and 21. Node 11 is the third bus switching node, or switching node 3. This third bus switching node is connected to node 6 via nodes 10, 9, 8, and 7. Node 12 is the fourth bus switching node, or switching node 4. This fourth bus switching node is connected to node 23 via nodes 19, 20, and 21. The node with ID 4 is the fifth bus switch node, namely switch node 5. The fifth bus switch node is connected to the node with ID 0 through the node with ID 3, the node with ID 2, and the node with ID 1. The node with ID 5 is the sixth bus switch node, namely switch node 6. The sixth bus switch node is also connected to the node with ID 10.

[0080] In this embodiment, since the host computer constructs the connection topology of the target communication bus according to the ID value of each node connected to the target communication bus and the total number of nodes, the user can more conveniently understand the connection topology of the target communication bus.

[0081] Another embodiment of the present application provides another implementation of a bus switch node. The difference between this implementation and the bus switch node is as follows:

[0082] In this embodiment, the control module 20 is further configured to read the IP address of the bus switch node from the target communication bus.

[0083] The host computer can display an identifier for the node representing the bus switching node based on the IP address of the bus switching node, so that the user can know that the node represents the bus switching node through the identifier. In other words, in the connection topology, the node representing the bus switching node will also display an identifier so that the user can know that the node represents the bus switching node through the identifier.

[0084] Taking two bus switching nodes connected via respective ring network terminals 40 and a device connected to the real terminal 50 of each bus switching node as an example, the connection topology is described in detail. Figure 8 As shown:

[0085] Figure 8 (a) shows the connection topology when both bus switching nodes and the nodes they are connected to are not faulty. Figure 8 (b) shows the connection topology of a bus switching node connected to a node that fails. Figure 8 and Figure 6 Nodes with the same ID value represent the same device or bus switching node.

[0086] The difference between the two is: Figure 8 In the diagram, identifiers are displayed on both the node with ID 1 and the node with ID 2. Through these identifiers, users who are not very clear about the connection relationship of the target communication bus can easily know that the node with ID 1 is the first bus switching node and the node with ID 2 is the second bus switching node. In addition, users can know that the node with ID 0 is the device connected to the first bus switching node and the node with ID 3 is the device connected to the second bus switching node.

[0087] Taking six bus switching nodes connected through their respective ring network terminals 40 and each bus switching node having at least one device connected to its real terminal 50 as an example, the connection topology is described in detail. Figure 9 As shown:

[0088] in, Figure 9 and Figure 7 Nodes with the same ID value represent the same device or bus switching node.

[0089] The difference between the two is: Figure 9Among the nodes with ID 17, 18, 11, 12, 4 and 5, users who are not very clear about the connection relationship of the target communication bus can easily know that the node with ID 17 is the first bus switching node, the node with ID 18 is the second bus switching node, the node with ID 11 is the third bus switching node, the node with ID 12 is the fourth bus switching node, the node with ID 4 is the fifth bus switching node and the node with ID 5 is the sixth bus switching node through this identification, thereby knowing the device connected to each bus switching node.

[0090] In this embodiment, since the control module 20 also sends its own IP to the host computer, the node representing the bus switching node will also display an identification in the connection topology of the constructed target communication bus, so that the user can know which node represents the bus switching node, so that the user can more easily know which device each node represents, which can help the user understand the connection relationship of the bus switching node more quickly.

[0091] Another embodiment of the present application provides an implementation of the switching matrix 10, the specific structure of which is as follows: Figure 10 As shown, it specifically includes: at least two first multi-position switches 11 and at least two second multi-position switches 12. The connection relationship between each device is as follows:

[0092] The single-interface side of each first multi-position switch 11 is connected in a one-to-one correspondence to an interface on the ring network end 40 of the switch matrix 10. The single-interface side of each second multi-position switch 12 is connected in a one-to-one correspondence to an interface on the real side of the switch matrix 10. Each interface on the multi-interface side of each first multi-position switch is connected in a one-to-one correspondence to each interface on the multi-interface side of each second multi-position switch 12.

[0093] For example, taking four first multi-position switches 11 and three second multi-position switches 12 as an example, the multi-interface side of each first multi-position switch 11 includes three interfaces, and the multi-interface side of each second multi-position switch 12 includes four interfaces. The three interfaces on the multi-interface side of the first first multi-position switch 11 are respectively connected to the first interfaces of the multiple interfaces of the three second multi-position switches 12. The three interfaces on the multi-interface side of the second first multi-position switch 11 are respectively connected to the second interfaces on the multi-interface side of the three second multi-position switches 12. The three interfaces on the multi-interface side of the third first multi-position switch 11 are respectively connected to the third interfaces on the multi-interface side of the three second multi-position switches 12. The three interfaces on the multi-interface side of the fourth first multi-position switch 11 are respectively connected to the fourth interfaces on the multi-interface side of the three second multi-position switches 12.

[0094] It should be noted that the first multi-position switch 11 and the second multi-position switch 12 are both very mature devices in the prior art. For example, the structure of the first multi-position switch 11 can be as follows: Figure 10 As shown in FIG. 11 , the structure of the second multi-position switch 12 can be as follows Figure 10 As shown in 12, it will not be described in detail here.

[0095] Another embodiment of the present application provides a communication network, which specifically includes: at least two bus switching nodes provided in the above embodiments. The connection relationship between the nodes is specifically as follows:

[0096] Among all bus switching nodes, every two bus switching nodes form a group. In each group, each interface on the ring network side of one bus switching node is connected to an interface on the ring network side of another bus switching node in a one-to-one correspondence. Each interface on the physical side of each bus switching node is connected to a physical node corresponding to that interface. A physical node can be a device or component.

[0097] In a specific example, in each group, the real nodes connected to the real ends of the two bus switching nodes are devices in two different systems.

[0098] The above example only shows one connection method of the real ends of the two bus switching nodes in each group. In practical applications, including but not limited to this, no specific limitation is made here and it can be determined according to the specific situation, all of which are within the scope of protection of this application.

[0099] In a specific example, each interface of the real end of each bus switching node is connected to the corresponding real node via a 1394B bus;

[0100] The above example only shows one connection method for each interface of the real end of the bus switching node. In practical applications, including but not limited to this, no specific limitation is made here and it can be determined according to the specific situation, all of which are within the scope of protection of this application.

[0101] In a specific example, in each group, each interface of the ring network end of one bus switching node is connected to an interface of the ring network end of another bus switching node via the 1394B bus in a one-to-one correspondence.

[0102] The above example only shows one connection method between the ring network ends of the two bus switching nodes in each group. In actual applications, including but not limited to this, no specific limitation is made here and it can be determined according to the specific situation, all of which are within the scope of protection of this application.

[0103] For the above description of the disclosed embodiments, the features recorded in the various embodiments in this specification can be replaced or combined with each other, so that professionals in this field can implement or use this application. The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as above with a preferred embodiment, it is not used to limit the present invention. Any technician familiar with the field can make many possible changes and modifications to the technical solution of the present invention using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A bus switching node, characterized in that: include: A switching matrix, a control module and at least two first repeaters; wherein: Each interface at the first end of the switching matrix is connected to an interface at the first end of the bus switching node in a one-to-one correspondence via the first repeater corresponding to the first repeater; Each interface at the second end of the switching matrix is connected to an interface at the second end of the bus switching node in a one-to-one correspondence; The switching matrix is controlled by the control module, and the control module is connected to the host computer; The switching matrix is controlled to connect corresponding interfaces on both sides thereof.

2. The bus switching node according to claim 1, wherein: The control module is used to read the ID value of each node and the total number of nodes connected to the target communication bus from the target communication bus, and send the reading result to the host computer; the target communication bus is the communication bus connected to the bus switching node.

3. The bus switching node according to claim 2, wherein: The control module is further configured to read the IP address of the bus switching node from the target communication bus.

4. The bus switching node according to claim 1, wherein: Also includes: At least two second repeaters; wherein: Each interface at the second end of the switching matrix is connected to an interface at the second end of the bus switching node in a one-to-one correspondence through a second repeater corresponding to the repeater.

5. The bus switching node according to any one of claims 1 to 4, characterized in that: Also includes: At least two switches; wherein: Each repeater in the bus switching node is connected in parallel with one of the switches; All the switches are controlled by the control module.

6. The bus switching node according to any one of claims 1 to 4, characterized in that: The first end of the bus switch node is a ring network end, and the second end of the bus switch node is a real device end; or, The first end of the bus switch node is a real device end, and the second end of the bus switch node is a ring network end.

7. The bus switching node according to any one of claims 1 to 4, characterized in that: The switching matrix includes: at least two first multi-position switching switches and at least two second multi-position switching switches; wherein: A single interface side of each of the first multi-position switching switches is connected to an interface of the ring network end of the switching matrix in a one-to-one correspondence; A single interface side of each second multi-position switch is connected to an interface on the real side of the switching matrix in a one-to-one correspondence; Each interface on the multi-interface side of each first multi-position switch is connected to each interface on the multi-interface side of each second multi-position switch in a one-to-one correspondence.

8. A communication network, characterized in that include: At least two bus switching nodes according to any one of claims 1 to 7; wherein: Among all the bus switching nodes, every two bus switching nodes form a group; In each group, each interface of the ring network end of one bus switching node is connected to an interface of the ring network end of another bus switching node in a one-to-one correspondence; Each interface of the real end of each bus switching node is connected to a real node corresponding to the interface.

9. The communication network according to claim 8, characterized in that In each group, the real nodes connected to the real terminals of the two bus switching nodes are devices in two different systems.

10. The communication network according to claim 8 or 9, characterized in that Each interface of the physical end of each bus switching node is connected to the corresponding physical node via a 1394B bus; In each group, each interface of the ring network end of one bus switching node is connected to an interface of the ring network end of another bus switching node in a one-to-one correspondence via the 1394B bus.

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