Wavelength hard isolation method and system, electronic equipment and product

Abstract

The invention relates to a wavelength hard isolation method, which comprises the steps of planning a wavelength allocation scheme of each safety partition, and determining the number of wavelength channels and a waveband allocation strategy based on a power grid network topology structure, a transmission distance range and an expected capacity demand; a wavelength routing strategy of the OLT equipment is configured, and wavelength sets of different security partitions are multiplexed to single fiber transmission through a wavelength multiplexer; oNU terminal devices are configured, each ONU terminal device is provided with a wavelength selective optical filter in advance, and only the specified wavelength of the corresponding security partition is received; and verifying the physical isolation performance of each wavelength channel to ensure that the power grid security partition requirement is met. Different wavelength routing strategies are configured on OLT equipment, a wavelength selective optical filter is preset on ONU terminal equipment, only specified wavelengths of corresponding safety partitions are received, hard isolation of different areas according to the wavelengths is achieved, and safety protection regulations of an electric power monitoring system are met.

Description

Technical Field

[0001] This invention relates to the field of communication equipment technology, specifically to a wavelength hard isolation method, system, electronic device, and product. Background Technology

[0002] With the advancement of smart grid construction, the power system's requirements for the reliability and security of communication networks are increasing. Currently, power grids generally adopt a layered and zoned architecture, requiring strict isolation between areas of different security levels (such as production control areas and management information areas). Traditional isolation technologies mainly include physical isolation devices and logical isolation via firewalls, but these suffer from problems such as low bandwidth utilization and poor scalability.

[0003] In recent years, the application of optical communication technology in power systems has gradually deepened. Wavelength division multiplexing (WDM) and passive optical network (GPON) technologies have provided new directions for high-bandwidth, low-latency power communication. Currently, physical isolation, VLAN logical isolation, and MPLS-VPN technologies are mainly used for isolated transmission in areas with different security levels.

[0004] 1. Physical isolation solution: Complete physical isolation is achieved through independent optical fiber or SDH equipment. It has the best isolation effect but is expensive and cannot dynamically adjust bandwidth resources, making it difficult to adapt to the rapidly growing demand of power grid services. 2. VLAN logical isolation: Logical channels are divided within the same network using virtual LANs. This method is low-cost but carries the security risk of being penetrated.

[0005] 3. MPLS-VPN technology: It establishes a virtual private network through multi-protocol label switching, which can achieve a certain degree of service isolation, but it depends on the processing capacity of the routing equipment. Summary of the Invention

[0006] The purpose of this invention is to provide a wavelength hard isolation method, system, electronic device, and product to solve the problems mentioned in the background art.

[0007] A first aspect of the present invention provides a wavelength hard isolation method, comprising: S1. Plan the wavelength allocation scheme for each safety zone. Based on the power grid network topology, transmission distance range and expected capacity requirements, determine the number of wavelength channels and band allocation strategy. The production control zone is allocated the first wavelength set, and the management information zone is allocated the second wavelength set. S2. Configure the wavelength routing policy of the OLT device to multiplex the wavelength sets of different security zones to single-fiber transmission through the wavelength multiplexer; S3. Configure ONU terminal devices. Each ONU terminal device is pre-set with a wavelength selective optical filter to receive only the specified wavelength of the corresponding security zone. S4. Verify the physical isolation performance of each wavelength channel to ensure that the power grid safety zoning requirements are met; The wavelength allocation scheme is dynamically expanded according to the growth of network services, and the newly added wavelength channels provide elastic bandwidth resources.

[0008] In one possible implementation, determining the number of wavelength channels and the band allocation strategy based on the power grid network topology, transmission distance range, and expected capacity requirements includes: Collect power grid network topology parameters, including topology type, node connection density, and service aggregation level; Measure the transmission distance range, divide the distance intervals, and associate them with band performance characteristics; Analyze the expected capacity demand, combine business priorities and traffic prediction models, and dynamically calculate the number of wavelength channels and band allocation strategies. The number of wavelength channels is adjusted in a positive correlation with topology complexity and capacity requirements, and the allocation result satisfies the requirements of maximizing wavelength resource utilization and isolation.

[0009] In one possible implementation, determining the wavelength channel based on the power grid network topology includes: Identify network topology types and their node connection densities; Multiple wavelength channels are allocated to core nodes for business convergence to form redundant links; The number of wavelength channels is allocated to the terminal nodes of the tree-like branches in descending order of hierarchy. A dedicated wavelength channel is pre-defined for the disaster recovery protection link.

[0010] In one possible implementation, the measurement of transmission distance range, the division of distance intervals, and the association of band performance characteristics include: Establish a mapping relationship between transmission distance and band performance; High-bandwidth transmission bands are selected for short-distance transmission; Conventional communication bands were selected for medium-range transmission; Select low-loss transmission bands for long-distance transmission; Load optical signal compensation parameters that match the wavelength band.

[0011] In one possible implementation, the analysis of expected capacity demand, combined with service priority and traffic prediction models, dynamically calculates the number of wavelength channels and band allocation strategies, including: Monitor the bandwidth utilization of each wavelength channel in real time and formulate wavelength allocation strategies based on service priorities; Allocate dedicated wavelength channels to high-priority services; Allocate shared wavelength channels for low-priority services; When the traffic exceeds a preset threshold, a new wavelength channel is allocated.

[0012] In one possible implementation, the ONU terminal device has a preset wavelength-selective optical filter that receives only the specified wavelength corresponding to the security zone, including: ONU terminal equipment monitors the wavelength of the received signal in real time and automatically adjusts the optical filter parameters through digital signal processing algorithms; Specifically, the digital signal processing algorithm includes: Perform spectral feature analysis on the received optical signal to extract the dominant wavelength component; Construct a wavelength error function to calculate the deviation between the detection wavelength and the target wavelength; The center frequency of the filter is iteratively optimized using the gradient descent method. Wavelength drift error is dynamically compensated using a PID controller.

[0013] In one possible implementation, the wavelength allocation scheme is dynamically expanded according to network service growth, including: Real-time monitoring of bandwidth utilization of each wavelength channel to identify overloaded and idle channels; Based on the status of overloaded and idle channels, a band allocation scheme for the newly added wavelength channels is generated; OLT equipment loads the updated band allocation scheme without interruption; ONU terminal equipment can switch the receiving wavelength online via a reconfigurable optical module.

[0014] A second aspect of the present invention provides a wavelength hard isolation system, comprising: The analysis unit is used to plan the wavelength allocation scheme for each security zone. Based on the power grid network topology, transmission distance range and expected capacity requirements, it determines the number of wavelength channels and the band allocation strategy. The execution unit is used to configure the wavelength routing policy of the OLT device, multiplex the wavelength sets of different security zones to single-fiber transmission through the wavelength multiplexer, configure the ONU terminal device, and each ONU terminal device is preset with a wavelength selective optical filter to receive only the specified wavelength of the corresponding security zone. The monitoring unit is used to verify the physical isolation performance of each wavelength channel to ensure that the power grid safety zoning requirements are met.

[0015] A third aspect of the present invention provides an electronic device, the device comprising: One or more processors; and a memory storing computer program instructions that, when executed, cause the processors to perform the aforementioned method.

[0016] A fourth aspect of the present invention provides a computer-readable medium having stored thereon computer program instructions that can be executed by a processor to implement the aforementioned method.

[0017] A fifth aspect of the present invention provides a computer program product comprising a computer program / instructions that, when executed by a processor, implement the steps of the method described above.

[0018] Compared with the prior art, the beneficial effects of the present invention are: 1. By configuring different wavelength routing strategies on the OLT device, the ONU terminal device is equipped with a wavelength selective optical filter that only receives the specified wavelength of the corresponding security zone, thereby achieving hard isolation of different areas according to wavelength and meeting the security protection regulations of the power monitoring system. 2. By comprehensively analyzing three parameters—the power grid network topology, transmission distance range, and expected capacity requirements—the optimal number of wavelength channels and band allocation strategy are obtained to improve the efficiency of optical fiber transmission and ensure timely transmission of services in different zones. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a wavelength hard isolation method according to the present invention; Figure 2 This is a schematic diagram of the transmission process of a wavelength hard isolation method according to the present invention; Figure 3 This is a schematic diagram of a wavelength hard isolation system according to the present invention; Figure 4 This is a schematic diagram illustrating an exemplary structure of a processor and a memory according to the present invention; Figure 5 This is an exemplary structural diagram of an electronic device according to the present invention. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0021] It should be noted that the serial numbers assigned to the components in the embodiments of the present invention, such as "first" and "second", are only used to distinguish the described objects and have no sequential or technical meaning.

[0022] The following is combined with Figure 1 and Figure 2 A first aspect of the present invention, a wavelength hard isolation method, will be described.

[0023] A wavelength hard isolation method includes the following steps: S1. Plan the wavelength allocation scheme for each safety zone. Based on the power grid network topology, transmission distance range and expected capacity requirements, determine the number of wavelength channels and band allocation strategy. The production control zone is allocated the first wavelength set, and the management information zone is allocated the second wavelength set. S2. Configure the wavelength routing policy of the OLT device to multiplex the wavelength sets of different security zones to single-fiber transmission through the wavelength multiplexer; S3. Configure ONU terminal devices. Each ONU terminal device is pre-set with a wavelength selective optical filter to receive only the specified wavelength of the corresponding security zone. S4. Verify the physical isolation performance of each wavelength channel to ensure that the power grid safety zoning requirements are met; The wavelength allocation scheme is dynamically expanded according to the growth of network services, and the newly added wavelength channels provide elastic bandwidth resources.

[0024] In this invention, the OLT device is deployed at the central station, integrating a WDM multiplexer and a GPON-MAC controller. The ONU terminal device has a built-in fixed-wavelength transceiver module, and physical topology branching is achieved using a 1×N type PLC splitter. The OLT device's transmit power is +2~+7dBm (preferably +5dBm), and the ONU terminal device's receive sensitivity is ≤-28dBm@2.5Gbps. The OLT device uses an AWG to multiplex different service wavelengths onto the same optical fiber, and fixed wavelengths are allocated to each security zone, such as λ1-λ8 for the production control zone and λ9-λ16 for the management information zone.

[0025] This invention uses three parameters—the integrated power grid network topology, transmission distance range, and expected capacity—as the basis for determining the number of wavelength channels and band allocation strategy during transmission. This effectively improves the efficiency of fiber optic transmission, ensuring timely transmission of services in different zones. Furthermore, it prioritizes the transmission of services in the production control area, improving the efficiency of critical data transmission. The method for determining the number of wavelength channels and band allocation strategy during transmission using the integrated power grid network topology, transmission distance range, and expected capacity as parameters is described below.

[0026] Determining the number of wavelength channels and band allocation strategy based on the power grid network topology, transmission distance range, and expected capacity requirements includes the following steps: S11. Collect power grid network topology parameters, including topology type, node connection density, and service aggregation level; S12. Measure the transmission distance range, divide the distance intervals, and associate them with band performance characteristics; S13. Analyze the expected capacity demand, and dynamically calculate the number of wavelength channels and band allocation strategy by combining business priorities and traffic prediction models. The number of wavelength channels is adjusted positively correlated with topology complexity and capacity requirements, and the allocation result satisfies the requirements of maximizing wavelength resource utilization and isolation. Wavelength channel number = f(topology node density, capacity demand growth rate), band selection = g(transmission distance range, loss tolerance). A wavelength allocation matrix is ​​generated to guide OLT devices in configuring routing strategies. For example, high-density topologies, long-distance transmissions, and high capacity requirements allocate more low-loss band channels. Through the dynamic interaction of topology, distance, and capacity, wavelength resource utilization is improved.

[0027] The power grid network topology is mainly used to determine wavelength channels, and mainly includes: Identify network topology types and their node connection densities; allocate multi-wavelength channels to core nodes for service aggregation to form redundant links; allocate wavelength channels to terminal nodes of tree branches in descending order of level. A dedicated wavelength channel is pre-defined for the disaster recovery protection link.

[0028] Topology type identification: Automatically classifies the network as a ring, star, or tree structure. Core hub nodes (such as dispatch centers) are allocated more wavelength channels to support high connection density, while edge nodes (such as substations) are allocated in descending order of hierarchy to reduce resource waste.

[0029] Redundancy design: Reserve independent wavelength channels for disaster recovery links to ensure fault isolation. For example, in a ring topology, configure 1+1 wavelength protection for the core link.

[0030] Measuring the transmission distance range, dividing the distance intervals, and associating band performance characteristics include: Establish a mapping relationship between transmission distance and band performance; select high-bandwidth transmission bands for short-distance transmission, such as low-dispersion bands to support high-speed data transmission; select conventional communication bands for medium-distance transmission to balance bandwidth and loss; select low-loss transmission bands for long-distance transmission, such as high-penetration bands, and load dispersion compensation parameters to suppress signal attenuation; load optical signal compensation parameters that match the band and adjust the band to maintain the signal-to-noise ratio threshold.

[0031] The following method can be used to allocate wavelength channels using the expected capacity: Monitor the bandwidth utilization of each wavelength channel in real time and formulate wavelength allocation strategies based on service priorities; Allocate dedicated wavelength channels to high-priority services; Allocate shared wavelength channels for low-priority services; Based on historical data modeling, bandwidth growth trends are predicted. When capacity demand exceeds a threshold, wavelength channel expansion is triggered.

[0032] The following explains the execution method of the preset wavelength selective optical filter in the ONU terminal device, which only receives the specified wavelength of the corresponding security zone: ONU terminal equipment monitors the wavelength of the received signal in real time and automatically adjusts the optical filter parameters through digital signal processing algorithms; Specifically, the digital signal processing algorithm includes: (1) Perform spectral feature analysis on the received optical signal and extract the dominant wavelength component; Specifically, the optical signal can be converted into an electrical signal by a photodiode, sampled by an ADC at the Nyquist rate, and then transformed by a fast Fourier transform. Finally, the position of the maximum amplitude of the spectrum is identified as the main wavelength component.

[0033] (2) Construct a wavelength error function to calculate the deviation between the detection wavelength and the target wavelength; Where, Δλ=λ 检测 -λ 目标 The wavelength error function is J(Δλ) = α*|Δλ| 2 +β*|dφ / dλ|, In the formula, α: wavelength deviation weighting coefficient, β: phase change sensitivity coefficient, and φ: signal phase angle. Error compensation is generally activated when |Δλ>0.1nm.

[0034] (3) The center frequency of the filter is iteratively optimized using the gradient descent method; (4) The wavelength drift error is dynamically compensated by the PID controller, and the compensation value is obtained by the standard PID control formula.

[0035] This invention also includes an extension mechanism to extend the wavelength channel, specifically in the following manner: Real-time monitoring of bandwidth utilization of each wavelength channel to identify overloaded and idle channels; Based on the status of overloaded and idle channels, a band allocation scheme for the newly added wavelength channels is generated; OLT equipment loads the updated band allocation scheme without interruption; ONU terminal equipment can switch the receiving wavelength online via a reconfigurable optical module.

[0036] like Figure 3 As shown, a second aspect of the present invention provides a wavelength hard isolation system, comprising: Analysis unit 10 is used to plan the wavelength allocation scheme for each security zone, and to determine the number of wavelength channels and band allocation strategy based on the power grid network topology, transmission distance range and expected capacity requirements. Execution unit 20 is used to configure the wavelength routing policy of the OLT device, multiplex the wavelength sets of different security zones to single fiber transmission through the wavelength multiplexer, configure the ONU terminal device, and each ONU terminal device is preset with a wavelength selective optical filter to receive only the specified wavelength of the corresponding security zone. The monitoring unit 30 is used to verify the physical isolation performance of each wavelength channel to ensure that the power grid safety zoning requirements are met.

[0037] Furthermore, some embodiments of the present invention also provide an electronic device. The electronic device can be various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, etc. The electronic device can also be various forms of mobile systems, such as personal digital assistants, cellular phones, smartphones, wearable devices, and other similar computing systems.

[0038] The electronic device includes: one or more processors; and a memory storing computer program instructions that, when executed, cause the processor to perform the steps of the methods provided in any one or more of the above embodiments. Figure 4 An exemplary structural diagram of the electronic device is disclosed. For example... Figure 4 As shown, the electronic device includes: One or more processors 11, memory 12, and interfaces for connecting the components, including high-speed interfaces and low-speed interfaces. The components are interconnected using different buses and can be mounted on a common motherboard or otherwise as required. The processors can process instructions executed within the electronic device, including instructions stored in or on memory to display graphical information of a GUI on an external input / output system (such as a display device coupled to the interface). In some other embodiments, multiple processors and / or multiple buses can be used with multiple memories and multiple memory modules, if desired. Similarly, multiple electronic devices can be connected, each providing some of the necessary operations (e.g., as a server array, a group of blade servers, or a multiprocessor system). The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0039] The electronic device may further include an input system 13 and an output system 14. The processor 11, memory 12, input system 13, and output system 14 may be connected via a bus or other means. Figure 5 Taking the example of a connection between China and Israel via a bus.

[0040] Input system 13 can receive input numerical or character information, and generate key signal inputs related to user settings and function control of the electronic device, such as touch screens, keypads, mice, trackpads, touchpads, pointers, one or more mouse buttons, trackballs, joysticks, etc. Output system 14 may include display devices, auxiliary lighting systems (e.g., LEDs), and haptic feedback systems (e.g., vibration motors). The display device may include, but is not limited to, liquid crystal displays (LCDs), light-emitting diode (LED) displays, and plasma displays. In some embodiments, the display device may be a touch screen.

[0041] In this embodiment of the invention, a computer-readable medium stores a computer program / instructions, which, when executed by a processor, implement the steps of the methods provided in any one or more of the above embodiments. The computer-readable medium may be included in the electronic device described in the above embodiments; or it may exist independently and not assembled into the device. The computer-readable medium carries one or more computer-readable instructions.

[0042] The memory 12 can serve as a non-transitory computer-readable storage medium, used to store non-transitory software programs, non-transitory computer-executable programs, and modules. The processor 11 executes various server functions and data processing by running the non-transitory software programs, instructions, and modules stored in the memory 12, thereby implementing the program instructions / modules corresponding to the methods provided in any one or more of the embodiments of the present invention.

[0043] The computer program product provided in this embodiment of the invention includes one or more computer programs / instructions. When executed by a processor, these computer programs / instructions generate all or part of the processes or functions described in this embodiment of the invention. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable system. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state drive (SSD)).

[0044] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be embraced within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims. Furthermore, it is clear that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or systems recited in the system claims may also be implemented by a single unit or system in software or hardware. The terms "first," "second," etc., are used to indicate names and do not indicate any particular order.

Claims

1. A wavelength hard isolation method, characterized in that, S1. Plan the wavelength allocation scheme for each safety zone. Based on the power grid network topology, transmission distance range and expected capacity requirements, determine the number of wavelength channels and band allocation strategy. The production control zone is allocated the first wavelength set, and the management information zone is allocated the second wavelength set. S2. Configure the wavelength routing policy of the OLT device to multiplex the wavelength sets of different security zones to single-fiber transmission through the wavelength multiplexer; S3. Configure ONU terminal devices. Each ONU terminal device is pre-set with a wavelength selective optical filter to receive only the specified wavelength of the corresponding security zone. S4. Verify the physical isolation performance of each wavelength channel to ensure that the power grid safety zoning requirements are met; The wavelength allocation scheme is dynamically expanded according to the growth of network services, and the newly added wavelength channels provide elastic bandwidth resources.

2. The wavelength hard isolation method according to claim 1, characterized in that, The determination of the number of wavelength channels and band allocation strategy based on the power grid network topology, transmission distance range, and expected capacity requirements includes: Collect power grid network topology parameters, including topology type, node connection density, and service aggregation level; Measure the transmission distance range, divide the distance intervals, and associate them with band performance characteristics; Analyze the expected capacity demand, combine business priorities and traffic prediction models, and dynamically calculate the number of wavelength channels and band allocation strategies. The number of wavelength channels is adjusted in a positive correlation with topology complexity and capacity requirements, and the allocation result satisfies the requirements of maximizing wavelength resource utilization and isolation.

3. The wavelength hard isolation method according to claim 2, characterized in that, Based on the power grid network topology, the wavelength channels are determined as follows: Identify network topology types and their node connection densities; Multiple wavelength channels are allocated to core nodes for business convergence to form redundant links; The number of wavelength channels is allocated to the terminal nodes of the tree-like branches in descending order of hierarchy. A dedicated wavelength channel is pre-defined for the disaster recovery protection link.

4. The wavelength hard isolation method according to claim 2, characterized in that, The measured transmission distance range, the division of distance intervals, and the association of band performance characteristics include: Establish a mapping relationship between transmission distance and band performance; High-bandwidth transmission bands are selected for short-distance transmission; Conventional communication bands were selected for medium-range transmission; Select low-loss transmission bands for long-distance transmission; Load optical signal compensation parameters that match the wavelength band.

5. The method for hard wavelength isolation in power grid security partitioning for hybrid WDM-GPON according to claim 2, characterized in that, The analysis of expected capacity requirements, combined with service priorities and traffic prediction models, dynamically calculates the number of wavelength channels and band allocation strategies, including: Monitor the bandwidth utilization of each wavelength channel in real time and formulate wavelength allocation strategies based on service priorities; Allocate dedicated wavelength channels to high-priority services; Allocate shared wavelength channels for low-priority services; When the traffic exceeds a preset threshold, a new wavelength channel is allocated.

6. The wavelength hard isolation method according to claim 1, characterized in that, The ONU terminal device has a preset wavelength-selective optical filter that only receives specified wavelengths corresponding to the security zone, including: ONU terminal equipment monitors the wavelength of the received signal in real time and automatically adjusts the optical filter parameters through digital signal processing algorithms; Specifically, the digital signal processing algorithm includes: Perform spectral feature analysis on the received optical signal to extract the dominant wavelength component; Construct a wavelength error function to calculate the deviation between the detection wavelength and the target wavelength; The center frequency of the filter is iteratively optimized using the gradient descent method. Wavelength drift error is dynamically compensated using a PID controller.

7. The wavelength hard isolation method according to claim 1, characterized in that, The wavelength allocation scheme is dynamically expanded according to the growth of network services, including: Real-time monitoring of bandwidth utilization of each wavelength channel to identify overloaded and idle channels; Based on the status of overloaded and idle channels, a band allocation scheme for the newly added wavelength channels is generated; OLT equipment loads the updated band allocation scheme without interruption; ONU terminal equipment can switch the receiving wavelength online via a reconfigurable optical module.

8. A wavelength hard isolation system for performing the method as described in any one of claims 1 to 7, characterized in that, include: The analysis unit is used to plan the wavelength allocation scheme for each security zone, and to determine the number of wavelength channels and band allocation strategy based on the power grid network topology, transmission distance range and expected capacity requirements. The execution unit is used to configure the wavelength routing policy of the OLT device, multiplex the wavelength sets of different security zones to single-fiber transmission through the wavelength multiplexer, configure the ONU terminal device, and each ONU terminal device is preset with a wavelength selective optical filter to receive only the specified wavelength of the corresponding security zone. The monitoring unit is used to verify the physical isolation performance of each wavelength channel to ensure that the power grid safety zoning requirements are met.

9. An electronic device, characterized in that, The electronic device includes: One or more processors; and a memory storing computer program instructions that, when executed, cause the processor to perform the method as described in any one of claims 1 to 7.

10. A computer program product comprising a computer program / instructions, characterized in that, When the computer program / instructions are executed by the processor, they implement the steps of the method according to any one of claims 1 to 7.

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