Network management collaboration method and system for hybrid networks

Abstract

The present application discloses a network management collaboration method and system for a hybrid network. The hybrid network includes a first channel and a second channel. The target ECU device receives a first local network management message sent by other ECU devices from the first channel and the second channel respectively, extracts the PNC ID information corresponding to the other ECU devices in the current scene, and compares it with the preset PNC ID information to which it belongs. If the comparison is successful, the corresponding PNC ID is determined to be a wake-up PNC ID, and the target ECU device is awakened; the information of all wake-up PNC IDs is integrated to obtain an integration result; according to the integration result, the local network state is obtained and a network management collaboration request is generated; and the second local network management message filling the local network state is sent to the first channel and the second channel respectively for network management collaboration. The present application can make network management more comprehensive and accurate.

Description

Technical Field

[0001] The present application belongs to the field of network management technology, and in particular, to a network management collaboration method and system for a hybrid network. Background Art

[0002] With the increasing complexity of automotive electronic systems and the dramatic increase in data volume, the traditional Controller Area Network (CAN) bus can no longer meet the needs of high-speed data transmission, and Ethernet (ETH) has become a core component of the new generation of vehicle networks due to its high bandwidth and low latency. Therefore, a hybrid network topology architecture with Ethernet backbone and CAN bus connecting actuators has been formed, and the coordination of CAN and ETH network management is also imperative. However, the current mainstream solutions on the market directly adopt the network management of a single CAN bus. If the coordination problem is not solved, it will lead to chaotic network management and affect the stability and reliability of the system. Summary of the invention

[0003] The technical purpose of the present application is to provide a network management collaboration method and system for a hybrid network in order to address the technical problem that the current hybrid network lacks a network management collaboration method, which affects the stability and reliability of the system.

[0004] In order to achieve the above technical objectives, this application adopts the following technical solutions.

[0005] In a first aspect, an embodiment of the present application provides a network management collaboration method for a hybrid network, the network management collaboration method being applied to an ECU device in a hybrid network, the hybrid network comprising a first channel and a second channel, the network management collaboration method comprising:

[0006] The target ECU device receives the first local network management message sent by other ECU devices from the first channel and the second channel respectively, where the first local network management message includes PNC ID information corresponding to the other ECU devices in the current scene;

[0007] Extracting the PNC ID information from the first local network management message, comparing the PNC ID information with the preset PNC ID information to which the ECU belongs, and if the comparison is successful, determining the corresponding PNC ID as a wake-up PNC ID, and the target ECU device is woken up;

[0008] Integrate information of all the wake-up PNC IDs to obtain an integration result; obtain a local network state and generate a network management collaboration request based on the integration result;

[0009] According to the local network status and the network management collaboration request, a second local network management message is sent to the first channel and the second channel respectively, and the local network status is filled in the second local network management message for network management collaboration.

[0010] In some embodiments, the first channel is a CAN bus, and the second channel is an Ethernet bus.

[0011] In some implementations, information integration is performed on all the wake-up PNC IDs to obtain an integration result, including:

[0012] A PNC ID matrix is ​​used to store the values ​​of all PNC IDs, wherein the value of the wake-up PNC ID is set to 1, and the value of the non-wake-up PNC ID is set to 0;

[0013] When the PNC ID is determined to be the wake-up PNC ID according to the first local network management message received through the first channel, or when the PNC ID is determined to be the wake-up PNC ID according to the first local network management message received through the second channel, the value corresponding to the PNC ID is set to 1;

[0014] Otherwise, when the PNCID is determined to be a non-wake-up PNC ID based on receiving the first local network management message from the first channel, and the PNC ID is determined to be a non-wake-up PNC ID based on receiving the first local network management message from the second channel, the value corresponding to the PNC ID is set to 0.

[0015] In some implementations, the method further includes performing state machine management on the first channel and the second channel respectively.

[0016] In some implementations, the network management collaboration method further includes:

[0017] respectively monitoring the bus status of the first channel and the bus status of the second channel, and whether the first channel and the second channel receive or send local network management messages, to obtain real-time monitoring results;

[0018] A channel control instruction is generated according to the monitoring result, so as to control the first channel or the second channel to be opened, or to control the first channel or the second channel to be closed according to the channel control instruction.

[0019] In a second aspect, an embodiment of the present application provides a network management collaboration system for a hybrid network, the network management collaboration system being applied to an ECU device in the hybrid network, the hybrid network comprising a first channel and a second channel, the network management collaboration system comprising:

[0020] A first network management module, configured for a target ECU device to receive a first local network management message sent by other ECU devices from the first channel;

[0021] A second network management module, configured for the target ECU device to receive a first local network management message sent by other ECU devices from the second channel, wherein the first local network management message includes PNC ID information corresponding to the other ECU devices in the current scene;

[0022] The first network management module and the second network management module are further used to extract the PNC ID information from the first local network management message, compare the PNC ID information with the preset PNC ID information to which the PNC ID belongs, and if the comparison is successful, determine the corresponding PNC ID as a wake-up PNC ID, and the target ECU device is woken up;

[0023] A signal integration module, used to integrate information of all the wake-up PNC IDs to obtain an integration result;

[0024] A local network management module, configured to obtain a local network state and generate a network management collaboration request according to the integration result; and send the local network state and the network management collaboration request to the first network management module and the second network management module respectively;

[0025] The first network management module and the second network management module are also used to send a second local network management message to the first channel and the second channel respectively according to the local network status and the network management collaboration request, and the local network status is filled in the second local network management message for network management collaboration.

[0026] In some embodiments, the hybrid network includes a network bus state management module;

[0027] The network bus status management module is connected to the first channel and the second channel respectively, and is used to monitor the bus status of the first channel and the second channel respectively, and whether the first channel and the second channel receive or send local network management messages, obtain real-time monitoring results, and send the monitoring results to the local network management module;

[0028] The local network management module is further used to generate a channel control instruction according to the monitoring result, and send the channel control instruction to the network bus state management module;

[0029] The network bus state management module is further used to control the first channel or the second channel to be turned on or to control the first channel or the second channel to be turned off according to the channel control instruction.

[0030] Compared with the prior art, the network management collaboration method for a hybrid network provided in the embodiment of the present application can receive network management messages from multiple channels, and extract, compare and integrate information from the network management messages, thereby ensuring that the network status is updated in a timely manner, providing timely data support for collaborative management, and making network management more comprehensive and accurate, thereby effectively avoiding or reducing the impact of failures on network stability.

[0031] Compared with the prior art, the network management collaboration system of the hybrid network provided in the embodiment of the present application has the same beneficial technical effects as the network management collaboration method of the hybrid network provided in the embodiment of the present application, which will not be elaborated on. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings described herein are for explanation purposes only and are not intended to limit the scope of the present application in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes and are used to help understand the present application. They do not specifically limit the shapes and proportional dimensions of the components of the present application. Under the guidance of the present application, those skilled in the art can select various possible shapes and proportional dimensions to implement the present application according to specific circumstances. In the drawings:

[0033] Figure 1 A schematic diagram of a flow chart of a network management collaboration method for a hybrid network provided in an embodiment of the present application;

[0034] Figure 2 A schematic diagram of the format of a local network message sent in the network management collaboration method of a hybrid network provided in an embodiment of the present application;

[0035] Figure 3 A schematic diagram of the network management collaboration system principles for a hybrid network provided in an embodiment of the present application. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0037] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features.

[0038] As for the collaborative method of CAN (Controller Area Network) and ETH (Ethernet) network management, the mainstream solution in the market is to directly adopt the network management of a single CAN bus. If the collaborative problem is not solved, it may cause the following problems:

[0039] 1. Insufficient management of network complexity: CAN network management is usually simple, lacking effective management methods for complex network structures. In a hybrid network, the complexity of the Ethernet part requires more sophisticated configuration and management, which is difficult to deal with using only CAN methods.

[0040] 2. Network stability risk: In a hybrid network, different network segments have different management strategies, which may lead to network congestion, data conflicts or losses, affecting the stability and reliability of the network, especially when it comes to the transmission of security-critical information, which may cause security risks.

[0041] 3. Increased costs: Lack of coordinated network management will increase the complexity of system design, and CAN will need to be added to the backbone network to ensure communication, thereby increasing the manufacturing cost of the vehicle.

[0042] 4. Obstacles to technological upgrading: Future automotive technology development requires high integration and intelligence. Incoordinated network management will become a bottleneck for technology iteration and new function deployment, hindering the application of advanced technologies such as autonomous driving and vehicle networking.

[0043] Realizing effective coordination of CAN and ETH network management is crucial to building a high-performance, high-security, and easy-to-maintain intelligent automotive electronic architecture. This not only ensures the smooth transmission of various data streams between different networks, but also lays a solid foundation for the overall optimization of vehicle systems, cost control, and future functional expansion. To this end, the present application embodiment provides a hybrid network network management coordination method and system, which can realize the coordination of hybrid network management of hybrid buses such as CAN and ETH.

[0044] The present application is further described below in conjunction with the accompanying drawings and specific embodiments.

[0045] See also Figure 1A network management coordination method for a hybrid network is applied to an ECU device in the hybrid network, the hybrid network includes a first channel and a second channel, and the network management coordination method includes:

[0046] Step S1: The target ECU device receives a first partial network management message sent by other ECU devices through the first channel and the second channel respectively, where the first partial network management message includes PNC (Partial Network Cluster Identity Document) ID information corresponding to the other ECU devices in the current scenario;

[0047] Step S2: extracting PNC ID information from the first local network management message, and comparing the PNC ID information with the preset PNC ID information to which the ECU belongs. If the comparison is successful, the corresponding PNC ID is determined as a wake-up PNC ID, and the target ECU device is woken up;

[0048] Step S3: Integrate information of all wake-up PNC IDs to obtain integration results;

[0049] Step S4: According to the integration result, obtain the local network status and generate a network management collaboration request;

[0050] Step S5: according to the local network status and the network management collaboration request, a second local network management message is sent to the first channel and the second channel respectively, and the local network status is filled in the second local network management message for network management collaboration.

[0051] The first channel and the second channel are different types of communication protocol buses. In some embodiments, the first channel is a CAN bus, and the second channel is an Ethernet bus.

[0052] In the embodiment, the whole vehicle system requirements are defined in advance, the associated ECU (Electronic Control Unit) device information of each sleep and wake-up scenario is sorted out, and then grouped and integrated, the specific PNC ID to which the ECU belongs in each sleep and wake-up scenario is defined, and the correspondence between the ECU, PNC ID, communication channel (first channel or second channel) and other information is summarized.

[0053] The network management coordination of the CAN bus and the ETH bus needs to be implemented on nodes that support both the CAN network management protocol and the ETH network management protocol. According to the definition of the sleep and wake-up scenarios in the vehicle system requirements, the ECU nodes of the vehicle are divided under different PNC IDs. According to the assigned PNC ID, the ECU node can be pre-statically configured (in the first network management module and the second network management module) with the PNC ID that can be identified and needs to be supported. When (the first network management module and the second network management module) receive the network management message (the first local network management message) containing the PNC ID to which the node belongs, it is awakened and the state is switched according to the network state machine. If the PNC ID corresponding to the ECU node involves the CAN and ETH channels, the CAN and ETH network management messages (the second local network management message) are sent at the same time, and the CAN and ETH channels are requested or the network is released.

[0054] In the embodiment, in the current vehicle operation or functional scenario, the system predetermines the identifier (ID) of the partial network cluster (PNC) to which each electronic control unit (ECU) device belongs. The PNC ID can be used to distinguish different network clusters. In a hybrid network, different ECUs may be divided into different PNCs according to the current working scenario and requirements. In step S1, the target ECU obtains the PNC ID information of other ECUs by receiving the partial network management message sent by other ECUs. These PNC ID information reflects the network affiliation of other ECUs in the current scenario.

[0055] In the embodiment, in step S2, the target ECU compares its own PNC ID information with the PNC ID information received from other ECUs. If the comparison is successful, that is, the received PNC ID information is consistent with the PNC ID information of the current ECU, it means that these ECUs belong to the same PNC. In this case, the target ECU determines these PNC IDs as wake-up PNC IDs because they need to be woken up to jointly perform specific functions or respond to external requests, and the target ECU is woken up.

[0056] Through this comparison and judgment mechanism, the network management collaborative method can ensure that only necessary ECUs are woken up, thereby avoiding unnecessary energy consumption and network congestion, which helps to achieve the goals of energy saving and optimization and improve the overall performance and reliability of the vehicle.

[0057] In the embodiment, step S3 is based on the local network management PDU (Protocol Data Unit) message naming rules, such as Figure 2The example defines the network management message and sender and receiver of each CAN and ETH channel, and fills in the corresponding PNC ID information. In the example, the value of the wakeable PNC ID is set to 1, and the value of the non-wakeable PNC ID is set to 0.

[0058] Based on the same inventive concept as the network management collaboration method of the hybrid network provided in the above embodiment, the embodiment of the present application also provides a network management collaboration system of the hybrid network, and the network management collaboration system is applied to ECU devices in the hybrid network, such as Figure 3 As shown, the hybrid network includes a first channel and a second channel, and the network management coordination system includes: a first network management module, a second network management module, a signal integration module and a local network management module.

[0059] The first network management module is used for the target ECU device to receive the first local network management message sent by other ECU devices from the first channel.

[0060] The second network management module is used for the target ECU device to receive the first local network management message sent by other ECU devices from the second channel, and the first local network management message includes the PNC ID information corresponding to the other ECU devices in the current scene.

[0061] The first network management module and the second network management module are also used to extract PNC ID information from the first local network management message, and compare the PNC ID information with the preset PNC ID information to which it belongs. If the comparison is successful, the corresponding PNC ID is determined as a wake-up PNC ID, and the target ECU device is woken up.

[0062] The signal integration module is used to integrate information of all wake-up PNC IDs to obtain integration results.

[0063] The local network management module is used to obtain the local network status and generate a network management collaboration request according to the integration result; and send the local network status and the network management collaboration request to the first network management module and the second network management module respectively.

[0064] The first network management module and the second network management module are also used to send a second local network management message to the first channel and the second channel respectively according to the local network status and the network management collaboration request, and the local network status is filled in the second local network management message for network management collaboration.

[0065] In the embodiment, a first network management module (CAN bus) and a second network management module (ETH bus) are deployed simultaneously on the ECU node, and the target ECU receives a first local network management message sent by other ECU devices from the first channel or the second channel, and the first local network management message includes PNC ID information corresponding to other ECUs in the current scenario.

[0066] The target ECU extracts the PNC ID from the PNC ID information and compares it with the PNC ID to which it belongs defined in the system requirements. If the comparison is successful, the corresponding PNC ID is determined as a wake-up PNC ID, and the target ECU device is awakened. If the comparison is unsuccessful, the PNC ID is an unrecognizable local network cluster, and the wake-up message is ignored.

[0067] In the embodiment, when the first network management module or the second network management module receives a network message with a valid PNC ID, it is also necessary to perform state machine management respectively. The state machine processed by this software module is a network management state machine of a single channel.

[0068] The information integration module is mainly responsible for integrating all wake-up PNC ID information transmitted by the first network management module or the second network management module into a unified PNC ID information matrix, and outputting it to the local network management module.

[0069] In some embodiments, information of all wake-up PNC IDs is integrated to obtain the local network status, including: using a PNC ID matrix to store the values ​​of all PNC IDs, wherein the value of the wake-up PNC ID is set to 1, and the value of the non-wake-up PNC ID is set to 0; when the PNC ID is determined to be a wake-up PNC ID based on receiving a first local network management message from a first channel, or when the PNC ID is determined to be a wake-up PNC ID based on receiving a first local network management message from a second channel, the value of the corresponding PNC ID is set to 1; otherwise, when the PNC ID is determined to be a non-wake-up PNC ID based on receiving a first local network management message from the first channel, and when the PNC ID is determined to be a non-wake-up PNC ID based on receiving a first local network management message from the second channel, the value of the corresponding PNC ID is set to 0.

[0070] For example, the local network PNC 16 includes ECU devices on the first channel (CAN) and the second channel (ETH). Now the first network management module or the second network management module transmits PNC ID information to the information integration module. The transmission value of PNC ID in any of the first network management module or the second network management module is 1, which means that the PNC ID is 1 and needs to be awakened. Only when the PNC 16 values ​​transmitted by the first network management module or the second network management module are both 0, the local area network related to PNC 16 can sleep, and the information integration module sets the corresponding value of PNC 16 in the matrix to 0.

[0071] As the main control module, the local network management module is responsible for completing the following tasks:

[0072] 1. According to the PNC ID matrix information, clarify the local network status of the vehicle and run the state machine. The state machine processed by this software module is each local network state machine and each channel communication state machine in the hybrid network architecture.

[0073] 2. According to the PNC ID matrix information, send local network status and network management collaboration request information, including all wake-up PNC ID information, to the first network management module and the second network management module, so that the first network management module and the second network management module send a second local network management message to the CAN channel or Ethernet channel, and fill the local network management message with all wake-up PNC ID information; to maintain its own wake-up state.

[0074] 3. According to the bus status of the first channel and the second channel of the network bus status monitoring and whether the network management message is sent, make a collaborative decision and then control the CAN / ETH channel to be turned on or off through the network bus status management module. For example, for the channel corresponding to the currently awakened PNC ID, it is necessary to control the channel to be turned on. If all the PNC IDs corresponding to the channel are in sleep state, the channel is closed.

[0075] In some embodiments, the function of CAN and ETH network management coordination is mainly implemented by the local network management module, which makes a comprehensive decision to send the network management message for active or passive awakening on the corresponding CAN channel and ETH channel to realize the awakening of the target local area network. CAN and ETH are indistinguishable channels in the local area network, and the local network management module performs overall PNC state management to avoid state asynchrony or conflict.

[0076] Compared with the solution of single CAN bus network management, the embodiment of the present application realizes the coordinated network management of vehicle CAN and ETH hybrid bus, which has the following advantages:

[0077] 1. Unified management interface: Provides a unified network management platform that can monitor and control the CAN bus and Ethernet segments at the same time, simplifying network operation and maintenance work and reducing maintenance complexity.

[0078] 2. Optimize the deployment of functional scenarios: Through collaborative management, both CAN and ETH wake-up mechanisms can be supported, network resources can be allocated more effectively, and the deployment of functional scenarios can be optimized. For example, when a large amount of data needs to be transmitted at high speed, the advantages of Ethernet can be used; and in scenarios that require real-time response, the real-time nature of the CAN bus can be used. The vehicle functions can be flexibly planned on demand, network resources can be better used, and the energy consumption of the vehicle can be saved.

[0079] 3. Reduce costs: Collaborative management can simplify the network architecture and reduce unnecessary network devices and connections. This can not only reduce the complexity of the system, but also reduce the failure points and improve the stability of the system.

[0080] 4. Support future technology development: With the continuous development of technologies such as autonomous driving and vehicle networking, the vehicle network needs to support higher-level functions and services. The coordinated management of CAN and ETH can provide a solid foundation for the development of these technologies and make the vehicle network more flexible and scalable.

[0081] 5. Improve user experience: By optimizing data transmission and resource allocation, collaborative management can improve the response speed and performance of user interaction functions such as in-vehicle entertainment systems and navigation systems, thereby improving the user's driving experience.

[0082] The above is a detailed introduction to the network management collaboration method and system for the hybrid network provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the concept of the present application and should not be understood as limiting the scope of protection of the present application.

Claims

1. A network management collaboration method for a hybrid network, characterized in that: The network management coordination method is applied to an ECU device in a hybrid network, the hybrid network includes a first channel and a second channel, and the network management coordination method includes: The target ECU device receives the first local network management message sent by other ECU devices from the first channel and the second channel respectively, where the first local network management message includes PNCID information corresponding to the other ECU devices in the current scene; Extracting the PNC ID information from the first local network management message, comparing the PNC ID information with the preset PNC ID information to which the ECU belongs, and if the comparison is successful, determining the corresponding PNC ID as a wake-up PNC ID, and the target ECU device is woken up; Integrate information of all the wake-up PNC IDs to obtain an integration result; obtain a local network state and generate a network management collaboration request based on the integration result; According to the local network state and the network management collaboration request, send a second local network management message to the first channel and the second channel respectively, wherein the local network state is filled in the second local network management message for network management collaboration; Integrate information of all the wake-up PNC IDs to obtain integration results, including: A PNC ID matrix is ​​used to store the values ​​of all PNC IDs, wherein the value of the wake-up PNC ID is set to 1, and the value of the non-wake-up PNC ID is set to 0; When the PNC ID is determined to be the wake-up PNC ID according to the first local network management message received through the first channel, or when the PNC ID is determined to be the wake-up PNC ID according to the first local network management message received through the second channel, the value corresponding to the PNC ID is set to 1; Otherwise, when the PNC ID is determined to be a non-wake-up PNC ID based on the first local network management message received from the first channel, and the PNC ID is determined to be a non-wake-up PNC ID based on the first local network management message received from the second channel, the value corresponding to the PNC ID is set to 0.

2. The network management coordination method of a hybrid network according to claim 1, characterized in that: The first channel is a CAN bus, and the second channel is an Ethernet bus.

3. The network management coordination method of a hybrid network according to claim 1, characterized in that: The method further includes performing state machine management on the first channel and the second channel respectively.

4. The network management coordination method of a hybrid network according to claim 1, characterized in that: The network management collaborative method also includes: respectively monitoring the bus status of the first channel and the bus status of the second channel, and whether a local network management message is received or sent, to obtain a real-time monitoring result; A channel control instruction is generated according to the monitoring result, so as to control the first channel or the second channel to be opened or closed according to the channel control instruction.

5. A network management collaboration system for a hybrid network, characterized in that: The network management collaborative system is applied to an ECU device in a hybrid network, the hybrid network includes a first channel and a second channel, and the network management collaborative system includes: A first network management module, configured for a target ECU device to receive a first local network management message sent by other ECU devices from the first channel; A second network management module, configured for the target ECU device to receive a first local network management message sent by other ECU devices from the second channel, wherein the first local network management message includes PNC ID information corresponding to the other ECU devices in the current scene; The first network management module and the second network management module are further used to extract the PNC ID information from the first local network management message, compare the PNC ID information with the preset PNC ID information to which the PNC ID belongs, and if the comparison is successful, determine the corresponding PNC ID as a wake-up PNC ID, and the target ECU device is woken up; A signal integration module, used to integrate information of all the wake-up PNC IDs to obtain an integration result; A local network management module, configured to obtain a local network state and generate a network management collaboration request according to the integration result; and send the local network state and the network management collaboration request to the first network management module and the second network management module respectively; The first network management module and the second network management module are further configured to send a second local network management message to the first channel and the second channel respectively according to the local network state and the network management collaboration request, wherein the local network state is filled in the second local network management message for network management collaboration; The signal integration module integrates information of all the wake-up PNC IDs to obtain an integration result, including: A PNC ID matrix is ​​used to store the values ​​of all PNC IDs, wherein the value of the wake-up PNC ID is set to 1, and the value of the non-wake-up PNC ID is set to 0; When the PNC ID is determined to be the wake-up PNC ID according to the first local network management message received through the first channel, or when the PNC ID is determined to be the wake-up PNC ID according to the first local network management message received through the second channel, the value corresponding to the PNC ID is set to 1; Otherwise, when the PNC ID is determined to be a non-wake-up PNC ID based on the first local network management message received from the first channel, and the PNC ID is determined to be a non-wake-up PNC ID based on the first local network management message received from the second channel, the value corresponding to the PNC ID is set to 0.

6. The network management collaborative system of a hybrid network according to claim 5, characterized in that: The hybrid network includes a network bus state management module; The network bus status management module is connected to the first channel and the second channel respectively, and is used to monitor the bus status of the first channel and the bus status of the second channel respectively, and whether the first channel and the second channel receive or send local network management messages, obtain real-time monitoring results, and send the monitoring results to the local network management module; The local network management module is further used to generate a channel control instruction according to the monitoring result, and send the channel control instruction to the network bus state management module; The network bus state management module is further used to control the first channel or the second channel to be turned on or off according to a channel control instruction.

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