Wavelength multiplexing filtering isolation communication method, device and medium

Abstract

The application provides a wavelength multiplexing filtering isolation communication method, device and medium, and relates to the technical field of communication. The method comprises the following steps: adjusting a current filtering receiving parameter of a wavelength selective optical filter according to a specified wavelength dynamically allocated; the wavelength selective optical filter receives a wavelength multiplexing optical signal through the current filtering receiving parameter, so as to obtain a current filtering receiving optical signal from the wavelength multiplexing optical signal, and the wavelength multiplexing optical signal is composed of the specified wavelength optical signal through dynamic routing; obtaining a wavelength deviation between a current main wavelength of the current filtering receiving optical signal and the specified wavelength, and compensating the current filtering receiving optical signal according to the wavelength deviation to obtain the specified wavelength optical signal. The application saves resources through wavelength multiplexing, obtains accurate signals through filtering compensation, and enhances signal safety through dynamic allocation of the specified wavelength and dynamic routing.

Description

Technical Field

[0001] This application relates to at least the field of communication technology, and in particular to a wavelength multiplexing filtering isolation communication method, apparatus and medium. Background Technology

[0002] In some scenarios, wavelength isolation is a requirement for communication systems, helping to improve system reliability and security. However, existing wavelength isolation solutions include the following, each with its own drawbacks:

[0003] 1) Physical isolation solution: Complete physical isolation is achieved through independent optical fiber or SDH (Synchronous Digital Hierarchy) equipment. This solution offers the best isolation effect but is costly and cannot dynamically adjust bandwidth resources.

[0004] 2) VLAN (Virtual Local Area Network) logical isolation: Logical channels are divided within the same network through virtual local area networks. It has a lower cost but there is a security risk of being penetrated.

[0005] 3) MPLS VPN (Multiprotocol Label Switching Virtual Private Network) technology: A virtual private network is established through multiprotocol 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] To address the aforementioned shortcomings, this application provides a wavelength multiplexing filtering isolation communication method, apparatus, and medium to solve the following technical problems: proposing a new wavelength isolation scheme to reduce the cost of wavelength isolation while ensuring security.

[0007] In a first aspect, this application provides a wavelength multiplexing filtering isolation communication method, the method comprising:

[0008] Adjust the current filtering and receiving parameters of the wavelength-selective optical filter according to the dynamically allocated specified wavelength;

[0009] The wavelength-selective optical filter receives the wavelength-multiplexed optical signal through the current filtering and receiving parameters, and obtains the current filtered and received optical signal from the wavelength-multiplexed optical signal. The wavelength-multiplexed optical signal is combined with the specified wavelength optical signal through dynamic routing.

[0010] The wavelength deviation between the current dominant wavelength and the specified wavelength of the currently filtered received optical signal is obtained, and the wavelength deviation is compensated to obtain the optical signal of the specified wavelength.

[0011] Furthermore, based on the dynamically allocated specified wavelength, the current filtering and receiving parameters of the wavelength-selective optical filter are adjusted, specifically including:

[0012] The ONU adjusts the current filtering and receiving parameters of its wavelength-selective optical filter based on the wavelength dynamically assigned to it by the OLT, so that its wavelength-selective optical filter can receive optical signals including those of the wavelengths assigned to it; and / or,

[0013] The OLT dynamically allocates a wavelength specified by each ONU and sends the wavelength specified by the ONU to the corresponding ONU so that the corresponding ONU can adjust the current filtering and receiving parameters of its wavelength selective optical filter, so that its wavelength selective optical filter can receive optical signals including the wavelength specified by the ONU itself in the current filtering and receiving.

[0014] In this context, ONU stands for Optical Network Unit, and OLT stands for Optical Line Terminal.

[0015] Furthermore, the OLT dynamically assigns a specific wavelength to each ONU, including:

[0016] Based on the network topology of ONU distribution within the power grid, security partition information, the optical signal requirements of each ONU, and the filtering and receiving parameter range of its wavelength-selective optical filter, the OLT dynamically assigns different wavelengths to each ONU.

[0017] Furthermore, the wavelength-selective optical filter receives the wavelength-multiplexed optical signal through the current filtering and receiving parameters, in order to obtain the currently filtered and received optical signal from the wavelength-multiplexed optical signal. The wavelength-multiplexed optical signal is dynamically routed to combine a specified wavelength optical signal, specifically including:

[0018] The ONU's wavelength-selective optical filter filters the received wavelength-multiplexed optical signal from the OLT using its current filtering and receiving parameters, thereby obtaining its own currently filtered and received optical signal from the wavelength-multiplexed optical signal. The OLT then dynamically routes and combines the ONU's specified wavelength optical signal into the corresponding wavelength-multiplexed optical signal; and / or,

[0019] The OLT sends a wavelength-multiplexed optical signal to the ONU, which is dynamically routed and incorporates the ONU's own specified wavelength optical signal. This allows the ONU's wavelength-selective optical filter to filter and receive the wavelength-multiplexed optical signal using its current filtering and receiving parameters, thereby obtaining its own current filtered and received optical signal from the wavelength-multiplexed optical signal.

[0020] Furthermore, the OLT sends a wavelength-multiplexed optical signal to the ONU, which is dynamically routed and incorporates the ONU's own specified wavelength optical signal. Specifically, this includes:

[0021] Based on the network topology of ONU distribution within the power grid, security partition information, and the optical signal requirements of each ONU, the OLT plans the number of wavelength channels, sets up and multiplexes the optical signals of at least two ONUs with their own specified wavelengths to the same wavelength channel through dynamic routing, and sends the set up and multiplexed optical signals of at least two ONUs with their own specified wavelengths to the corresponding ONUs through the corresponding wavelength channels.

[0022] Furthermore, the wavelength deviation between the current dominant wavelength and the specified wavelength of the currently filtered received optical signal is obtained, and the wavelength deviation is compensated for to obtain the specified wavelength optical signal. Specifically, this includes:

[0023] The ONU obtains the wavelength deviation between its current dominant wavelength of the currently filtered received optical signal and its own specified wavelength, and compensates for this wavelength deviation to obtain the optical signal at its own specified wavelength; and / or,

[0024] The OLT enables the ONU to obtain the wavelength deviation between its current dominant wavelength of the currently filtered received optical signal and the wavelength specified by the ONU, and to compensate for the wavelength deviation of its current filtered received optical signal in order to obtain the optical signal of the specified wavelength of the ONU.

[0025] Furthermore, the wavelength deviation between the current dominant wavelength and the specified wavelength of the currently filtered received optical signal is obtained, and the wavelength deviation is compensated for to obtain the specified wavelength optical signal. Specifically, this includes:

[0026] Identify the position of the maximum spectral amplitude of the currently filtered received optical signal as the current dominant wavelength component, and obtain the current dominant wavelength of the current dominant wavelength component;

[0027] Calculate the wavelength deviation between the current main wavelength and the specified wavelength. In response to the wavelength deviation at the current moment meeting the preset conditions, use the PID standard control formula to calculate the compensation value for the current moment of the currently filtered received optical signal.

[0028] The PID controller compensates the currently filtered received optical signal based on the current compensation value to obtain an optical signal of the specified wavelength.

[0029] PID stands for proportional, integral, and derivative.

[0030] Furthermore, the wavelength deviation between the current dominant wavelength and the specified wavelength is calculated. In response to the wavelength deviation at the current moment satisfying a preset condition, the compensation value for the current moment of the filtered received optical signal is calculated using the PID standard control formula. Specifically, this includes:

[0031] Obtain the duration T of use for the same specified wavelength of the same wavelength selective optical filter, and calculate the current dominant wavelength at each moment within the duration T. With the same specified wavelength wavelength deviation ,verify Is the absolute value greater than the preset threshold?

[0032] If at the current moment If the absolute value is greater than the preset threshold, the compensation value for the current filtered received optical signal is calculated according to the following PID standard control formula:

[0033] ,

[0034] in, This is the compensation value at the current moment. = For wavelength deviation, For proportional gain, For integral gain, For differential gain, This is the integral term for the wavelength deviation. This is the differential term of the wavelength deviation. , , This was determined through the debugging and optimization of the same wavelength selective optical filter.

[0035] Secondly, this application provides a wavelength multiplexing filtering isolation communication device, the device comprising:

[0036] The adjustment module is used to adjust the current filtering and receiving parameters of the wavelength-selective optical filter according to the dynamically allocated specified wavelength;

[0037] The filtering module, connected to the adjustment module, is used by the wavelength selective optical filter to receive the wavelength multiplexed optical signal through the current filtering and receiving parameters, so as to obtain the current filtered and received optical signal from the wavelength multiplexed optical signal. The wavelength multiplexed optical signal is combined with the specified wavelength optical signal through dynamic routing.

[0038] The compensation module, connected to the filtering module, is used to obtain the wavelength deviation between the current dominant wavelength and the specified wavelength of the currently filtered received optical signal, and to compensate the currently filtered received optical signal according to the wavelength deviation to obtain the specified wavelength optical signal.

[0039] Thirdly, this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the wavelength multiplexing filtering isolation communication method described above.

[0040] This application provides a wavelength multiplexing filtering isolation communication method, apparatus, and medium. By setting a wavelength selective optical filter, the filtering and receiving parameters are adjusted according to a dynamically allocated specified wavelength. The wavelength multiplexed optical signal is received through the filtering and receiving parameters, and the specified wavelength optical signal is obtained through compensation. Wavelength multiplexing saves resources, filtering compensation obtains accurate signals, and dynamic allocation and dynamic routing enhance signal security. Attached Figure Description

[0041] Figure 1 This is a flowchart of a wavelength multiplexing filtering isolation communication method according to an embodiment of this application;

[0042] Figure 2 This is a flowchart of another wavelength multiplexing filtering isolation communication method according to an embodiment of this application;

[0043] Figure 3 This is a schematic diagram of the structure of a wavelength multiplexing filtering isolation communication device according to an embodiment of this application;

[0044] Figure 4 This is a schematic diagram of the structure of a computer-readable storage medium according to an embodiment of this application;

[0045] Figure 5 This is a schematic diagram of the structure of a computer device according to an embodiment of this application. Detailed Implementation

[0046] To enable those skilled in the art to better understand the technical solution of this application, the embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0047] It is understood that the specific embodiments and accompanying drawings described herein are merely for explaining this application and are not intended to limit this application.

[0048] It is understood that, without conflict, the various embodiments and features in the embodiments of this application can be combined with each other.

[0049] It is understood that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, while parts unrelated to this application are not shown in the drawings.

[0050] It is understood that each module or unit involved in the embodiments of this application may correspond to only one entity structure, or may be composed of multiple entity structures, or multiple modules or units may be integrated into one entity structure.

[0051] It is understood that, without conflict, the functions and steps marked in the flowcharts and block diagrams of this application may occur in a different order than that marked in the accompanying drawings.

[0052] It is understood that the flowcharts and block diagrams of this application illustrate the possible architecture, functions, and operations of systems, apparatuses, devices, and methods according to various embodiments of this application. Each block in a flowchart or block diagram may represent a module, unit, program segment, or code, containing executable instructions for implementing the specified function. Furthermore, each block or combination of blocks in the block diagrams and flowcharts may be implemented using a hardware-based device to implement the specified function, or using a combination of hardware and computer instructions.

[0053] It is understood that the modules and units involved in the embodiments of this application can be implemented by software or by hardware. For example, the modules and units can be located in the processor.

[0054] Example 1:

[0055] like Figure 1 As shown, this application provides a wavelength multiplexing filtering isolation communication method, the method comprising:

[0056] S1. Adjust the current filtering and receiving parameters of the wavelength-selective optical filter according to the dynamically allocated specified wavelength;

[0057] S2. The wavelength selective optical filter receives the wavelength multiplexed optical signal through the current filtering and receiving parameters, so as to obtain the current filtered and received optical signal from the wavelength multiplexed optical signal. The wavelength multiplexed optical signal is combined with the specified wavelength optical signal through dynamic routing.

[0058] S3. Obtain the wavelength deviation between the current dominant wavelength and the specified wavelength of the currently filtered received optical signal, and compensate the currently filtered received optical signal according to the wavelength deviation to obtain the specified wavelength optical signal.

[0059] In this embodiment, the provided method, by setting a wavelength-selective optical filter, adjusts the filtering and receiving parameters according to the dynamically allocated specified wavelength, receives the wavelength-multiplexed optical signal through the filtering and receiving parameters, and then obtains the specified wavelength optical signal through compensation. Wavelength multiplexing saves resources, filtering compensation obtains accurate signals, and dynamic allocation and dynamic routing enhance signal security. Dynamic allocation means that the allocation of specified wavelengths is variable, and the optical filter adapts to this change by adjusting its own parameters. Dynamic routing means that which specified wavelengths are multiplexed onto the same optical fiber for transmission can also be adjusted and changed; corresponding dynamic routing strategies can be formulated to guide the formation of dynamic routes. This enhances signal security and improves resource utilization and transmission performance.

[0060] Specifically, this embodiment provides an approximate wavelength hard isolation method, whose isolation effect is similar to physical isolation, but resource utilization can be improved and isolation costs can be reduced through dynamic adjustment. Specific application scenarios include meeting the security isolation requirements of smart grids.

[0061] 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.

[0062] The shortcomings of these existing technologies include: 1) physical isolation schemes have low resource utilization and are difficult to adapt to the rapidly growing needs of power grid business; 2) logical isolation schemes cannot meet the mandatory requirements of "security partitioning and dedicated network" for power monitoring systems; 3) existing hybrid networking schemes lack wavelength-level hard isolation mechanisms, posing a potential risk of data leakage.

[0063] Compared with existing technologies, the technology in this embodiment mainly solves the following technical problems: 1) How to improve the utilization rate of optical fiber resources while ensuring the strength of physical isolation; 2) How to realize dynamic adjustable bandwidth allocation between different security zones of the power grid; 3) How to avoid the risk of cross-regional data leakage that may be caused by traditional logical isolation schemes.

[0064] In recent years, the application of optical communication technology in power systems has gradually deepened. Wavelength Division Multiplexing (WDM) and Gigabit Passive Optical Network (GPON) technologies have provided new ideas for high-bandwidth, low-latency power communication.

[0065] Based on this, such as Figure 2 As shown, this embodiment relates to a method for hard wavelength isolation in power grid security partitioning based on hybrid WDM-GPON (Wavelength Division Multiplexing-Gigabit Passive Optical Network), including:

[0066] S10. Plan the wavelength allocation scheme for each security zone. Based on the power grid network topology, transmission distance range and expected capacity requirements, determine the number of wavelength channels and the band allocation strategy.

[0067] S20. Configure the wavelength routing policy of the OLT (Optical Line Terminal) device, and use a wavelength multiplexer to multiplex the wavelength sets of different security zones to single-fiber transmission.

[0068] S30. Configure ONU (Optical Network Unit) terminal equipment. Each ONU terminal equipment is equipped with a wavelength selective optical filter that only receives the specified wavelength of the corresponding security zone.

[0069] S40. Verify the physical isolation performance of each wavelength channel to ensure that the power grid safety zoning requirements are met.

[0070] This solution, by configuring different wavelength routing strategies on the OLT equipment and pre-setting wavelength selective optical filters on the ONU terminal equipment, only receives the specified wavelengths of the corresponding security zones, thereby achieving hard isolation of different areas based on wavelength and meeting the security protection regulations of power monitoring systems.

[0071] In one embodiment, S1, adjusting the current filtering and receiving parameters of the wavelength-selective optical filter according to the dynamically allocated specified wavelength, specifically includes:

[0072] The ONU adjusts the current filtering and receiving parameters of its wavelength-selective optical filter based on the wavelength dynamically assigned to it by the OLT, so that its wavelength-selective optical filter can receive optical signals including those of the wavelengths assigned to it; and / or,

[0073] The OLT dynamically allocates a wavelength specified by each ONU and sends the wavelength specified by the ONU to the corresponding ONU so that the corresponding ONU can adjust the current filtering and receiving parameters of its wavelength selective optical filter, so that its wavelength selective optical filter can receive optical signals including the wavelength specified by the ONU itself in the current filtering and receiving.

[0074] In this context, ONU stands for Optical Network Unit, and OLT stands for Optical Line Terminal.

[0075] In this embodiment, the specific components of the constructed power grid optical network communication system are as follows:

[0076] 1) OLT equipment: Deployed at the central station, integrating WDM multiplexer and GPON MAC (Media Access Control) controller;

[0077] 2) ONU equipment: Dedicated terminal for each zone, with built-in selective wavelength transceiver module;

[0078] 3) Passive optical splitter: 1×N type PLC (Planar Lightwave Circuit) splitter to realize physical topology branching;

[0079] 4) Wavelength division multiplexer: Arrayed waveguide grating (AWG), supporting 16 wavelength channels in C-band.

[0080] Selection / configuration of each component:

[0081] 1) OLT transmit power: +2~+7dBm (preferably +5dBm);

[0082] 2) ONU receiver sensitivity: ≤-28dBm@2.5Gbps;

[0083] 3) Wavelength spacing: 200 GHz (ITU-T G.694.1 standard);

[0084] 4) Spectrophotometer ratio: 1:32 (insertion loss <17dB).

[0085] In one implementation, the OLT dynamically assigns a specific wavelength to each ONU, specifically including:

[0086] Based on the network topology of ONU distribution within the power grid, security partition information, the optical signal requirements of each ONU, and the filtering and receiving parameter range of its wavelength-selective optical filter, the OLT dynamically assigns different wavelengths to each ONU.

[0087] In this embodiment, the working process and principle of the constructed power grid optical network communication system include:

[0088] 1) On the OLT side, different service wavelengths are multiplexed onto the same optical fiber via AWG;

[0089] 2) Different wavelengths are assigned to each safety zone (e.g., λ1-λ8 for the production control zone and λ9-λ16 for the management information zone).

[0090] 3) The ONU device only receives preset wavelengths, achieving physical layer hard isolation;

[0091] 4) The GPON protocol stack operates independently on its respective wavelength channel.

[0092] The power grid security partitioning wavelength hard isolation method based on hybrid WDM-GPON includes the following steps:

[0093] S10. 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.

[0094] S20. Configure the wavelength routing policy of the OLT device, and use the wavelength multiplexer to multiplex the wavelength sets of different security zones to single fiber transmission.

[0095] S30. Configure ONU terminal equipment. Each ONU terminal equipment is pre-set with a wavelength selective optical filter to receive only the specified wavelength of the corresponding security zone.

[0096] S40. Verify the physical isolation performance of each wavelength channel to ensure that the power grid safety zoning requirements are met;

[0097] The wavelength allocation scheme dynamically expands according to network service growth, with newly added wavelength channels providing flexible bandwidth resources. The OLT equipment is deployed at the central station, integrating a WDM multiplexer and a GPON-MAC controller. The ONU terminal equipment has a built-in adjustable wavelength transceiver module, utilizing a 1×N type PLC splitter to achieve physical topology branching. The OLT equipment's transmit power is +2~+7dBm (preferably +5dBm), and the ONU terminal equipment's receive sensitivity is ≤-28dBm@2.5Gbps. The OLT equipment uses an AWG to multiplex different service wavelengths onto the same fiber, with different wavelengths allocated to each security zone; for example, the production control zone uses λ1-λ8, and the management information zone uses λ9-λ16.

[0098] In one embodiment, S2, the wavelength-selective optical filter receives the wavelength-multiplexed optical signal through the current filtering and receiving parameters, so as to obtain the current filtered and received optical signal from the wavelength-multiplexed optical signal. The wavelength-multiplexed optical signal is composited with a specified wavelength optical signal through dynamic routing, specifically including:

[0099] The ONU's wavelength-selective optical filter filters the received wavelength-multiplexed optical signal from the OLT using its current filtering and receiving parameters, thereby obtaining its own currently filtered and received optical signal from the wavelength-multiplexed optical signal. The OLT then dynamically routes and combines the ONU's specified wavelength optical signal into the corresponding wavelength-multiplexed optical signal; and / or,

[0100] The OLT sends a wavelength-multiplexed optical signal to the ONU, which is dynamically routed and incorporates the ONU's own specified wavelength optical signal. This allows the ONU's wavelength-selective optical filter to filter and receive the wavelength-multiplexed optical signal using its current filtering and receiving parameters, thereby obtaining its own current filtered and received optical signal from the wavelength-multiplexed optical signal.

[0101] In this embodiment, three parameters—the integrated power grid network topology, transmission distance range, and expected capacity—are used 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, ensures timely transmission of services in different zones, and prioritizes the transmission of services in the production control area, thereby improving the efficiency of critical data transmission. Determining the number of wavelength channels and band allocation strategy during transmission based on actual conditions achieves dynamic allocation of designated wavelengths and dynamic routing of composite transmission wavelengths, while also improving signal transmission security and avoiding the risk of data leakage.

[0102] In one embodiment, the OLT sends a wavelength-multiplexed optical signal to the ONU, which is dynamically routed and incorporates the ONU's own specified wavelength optical signal, specifically including:

[0103] Based on the network topology of ONU distribution within the power grid, security partition information, and the optical signal requirements of each ONU, the OLT plans the number of wavelength channels, sets up and multiplexes the optical signals of at least two ONUs with their own specified wavelengths to the same wavelength channel through dynamic routing, and sends the set up and multiplexed optical signals of at least two ONUs with their own specified wavelengths to the corresponding ONUs through the corresponding wavelength channels.

[0104] In this embodiment, the method for 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:

[0105] Collect power grid network topology parameters, including topology type, node connection density, and service aggregation level;

[0106] Measure the transmission distance range, divide the distance intervals, and associate them with band performance characteristics;

[0107] Analyze the expected capacity demand, combine business priorities and traffic prediction models, and dynamically calculate the number of wavelength channels and band allocation strategies.

[0108] 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. For example, the number of wavelength channels = f(topology node density, capacity demand growth rate), and the band selection = g(transmission distance range, loss tolerance). By generating a wavelength allocation matrix, the routing strategy configuration of OLT devices is guided. For example, high-density topologies, long-distance transmission, and high capacity requirements allocate more low-loss band channels. Through the dynamic interaction of topology, distance, and capacity, the utilization rate of wavelength resources is improved.

[0109] The power grid network topology is mainly used to determine wavelength channels, and mainly includes:

[0110] Identify network topology types and node connection densities; allocate multiple wavelength channels to core nodes for business aggregation to form redundant links; allocate wavelength channels to terminal nodes of tree branches in descending order of level; and pre-set independent wavelength channels for disaster recovery protection links.

[0111] 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.

[0112] 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.

[0113] Measuring the transmission distance range, dividing the distance intervals, and associating band performance characteristics include:

[0114] 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.

[0115] The following method can be used to allocate wavelength channels using the expected capacity:

[0116] Real-time monitoring of bandwidth utilization of each wavelength channel; formulation of wavelength allocation strategies based on service priority; allocation of dedicated wavelength channels to high-priority services; allocation of shared wavelength channels to low-priority services; modeling based on historical data to predict bandwidth growth trends; and triggering wavelength channel expansion when capacity demand exceeds a threshold.

[0117] In one embodiment, S3, obtaining the wavelength deviation between the current dominant wavelength and the specified wavelength of the currently filtered received optical signal, and compensating the currently filtered received optical signal according to the wavelength deviation to obtain the specified wavelength optical signal, specifically includes:

[0118] The ONU obtains the wavelength deviation between its current dominant wavelength of the currently filtered received optical signal and its own specified wavelength, and compensates for this wavelength deviation to obtain the optical signal at its own specified wavelength; and / or,

[0119] The OLT enables the ONU to obtain the wavelength deviation between its current dominant wavelength of the currently filtered received optical signal and the wavelength specified by the ONU, and to compensate for the wavelength deviation of its current filtered received optical signal in order to obtain the optical signal of the specified wavelength of the ONU.

[0120] In this embodiment, the ONU terminal device has a preset wavelength selective optical filter that only receives the specified wavelength of the corresponding security zone. The ONU terminal device monitors the wavelength of the received signal in real time and automatically adjusts the optical filter parameters through digital signal processing algorithms.

[0121] In one embodiment, S3, obtaining the wavelength deviation between the current dominant wavelength and the specified wavelength of the currently filtered received optical signal, and compensating the currently filtered received optical signal according to the wavelength deviation to obtain the specified wavelength optical signal, specifically includes:

[0122] Identify the position of the maximum spectral amplitude of the currently filtered received optical signal as the current dominant wavelength component, and obtain the current dominant wavelength of the current dominant wavelength component;

[0123] Calculate the wavelength deviation between the current main wavelength and the specified wavelength. In response to the wavelength deviation at the current moment meeting the preset conditions, use the PID standard control formula to calculate the compensation value for the current moment of the currently filtered received optical signal.

[0124] The PID controller compensates the currently filtered received optical signal based on the current compensation value to obtain an optical signal of the specified wavelength.

[0125] PID stands for proportional, integral, and derivative.

[0126] In this embodiment, the digital signal processing algorithm at the ONU end includes:

[0127] 1) Perform spectral feature analysis on the received optical signal to extract the dominant wavelength component. Specifically, the optical signal can be converted into an electrical signal by a photodiode, sampled by an ADC (Analog-to-Digital Converter) at the Nyquist rate, and then the sampled signal can be transformed by a Fast Fourier Transform. Finally, the position of the maximum spectral amplitude is identified as the dominant wavelength component.

[0128] 2) Construct a wavelength error function to calculate the deviation between the detection wavelength and the target wavelength; where Δλ = λdetection - λtarget, and the wavelength error function is... In the formula, α is the wavelength deviation weighting coefficient, β is the phase change sensitivity coefficient, and φ is the signal phase angle. Generally, error compensation is activated when |Δλ|>0.1nm. Wavelength deviation can also be calculated by division or other methods.

[0129] 3) The center frequency of the filter is iteratively optimized using the gradient descent method.

[0130] 4) Wavelength drift error is dynamically compensated by a PID (Proportional, Integral, Differential) controller. The compensation value is obtained by the standard PID control formula. Compensation can be performed when the absolute value of the wavelength deviation is greater than the preset threshold (preset condition).

[0131] In one embodiment, the wavelength deviation between the current dominant wavelength and a specified wavelength is calculated. In response to the wavelength deviation at the current moment satisfying a preset condition, a PID standard control formula is used to calculate the current moment compensation value for the currently filtered received optical signal. Specifically, this includes:

[0132] Obtain the duration T of use for the same specified wavelength of the same wavelength selective optical filter, and calculate the current dominant wavelength at each moment within the duration T. With the same specified wavelength wavelength deviation ,verify Is the absolute value greater than the preset threshold?

[0133] If at the current moment If the absolute value is greater than the preset threshold, the compensation value for the current filtered received optical signal is calculated according to the following PID standard control formula:

[0134] ,

[0135] in, This is the compensation value at the current moment. = For wavelength deviation, For proportional gain, For integral gain, For differential gain, This is the integral term for the wavelength deviation. This is the differential term of the wavelength deviation. , , This was determined through the debugging and optimization of the same wavelength selective optical filter.

[0136] In this embodiment, the compensation value is calculated using the standard PID control formula and used for compensation control of the PID controller. The goal is to dynamically compensate for wavelength drift error and obtain the currently set specified wavelength optical signal. For one ONU, a specified wavelength can be used continuously for a period of time. During this period, the dynamic drift of the filter is compensated according to the above formula to obtain accurate current signal information.

[0137] In addition, this embodiment also includes an expansion mechanism to expand the wavelength channels. Specifically, it involves: real-time monitoring of the bandwidth utilization of each wavelength channel to identify overloaded and idle channels; generating a band allocation scheme for the new wavelength channels based on the status of overloaded and idle channels; the OLT device loading the updated band allocation scheme without interruption; and the ONU terminal device switching the receiving wavelength online through the reconfigurable optical module.

[0138] Corresponding to this embodiment, a power grid security partitioning wavelength hard isolation system based on hybrid WDM-GPON is also provided, including: an analysis unit, used to plan the wavelength allocation scheme for each security partition, and determine the number of wavelength channels and band allocation strategy based on the power grid network topology, transmission distance range and expected capacity requirements; an execution unit, used to configure the wavelength routing strategy of the OLT equipment, multiplex the wavelength sets of different security partitions to single-fiber transmission through a wavelength multiplexer, configure the ONU terminal equipment, and pre-set wavelength selective optical filters for each ONU terminal equipment to receive only the specified wavelengths of the corresponding security partition; and a monitoring unit, used to verify the physical isolation performance of each wavelength channel to ensure that the power grid security partitioning requirements are met.

[0139] This embodiment also provides an electronic device, which can be a digital computer of various forms, such as a laptop computer, desktop computer, workbench, personal digital assistant, server, blade server, mainframe computer, etc.; it can also be a mobile system of various forms, such as a personal digital assistant, cellular phone, smartphone, wearable device and other similar computing system.

[0140] Example 2:

[0141] like Figure 3 As shown, this application provides a wavelength multiplexing filtering isolation communication device, the device comprising:

[0142] Adjustment module 1 is used to adjust the current filtering and receiving parameters of the wavelength selective optical filter according to the dynamically allocated specified wavelength;

[0143] The filtering module 2, connected to the adjustment module 1, is used for the wavelength selective optical filter to receive the wavelength multiplexed optical signal through the current filtering receiving parameters, so as to obtain the current filtered receiving optical signal from the wavelength multiplexed optical signal. The wavelength multiplexed optical signal is combined with the specified wavelength optical signal through dynamic routing.

[0144] The compensation module 3, connected to the filtering module 2, is used to obtain the wavelength deviation between the current main wavelength and the specified wavelength of the currently filtered received optical signal, and to compensate the currently filtered received optical signal according to the wavelength deviation to obtain the specified wavelength optical signal.

[0145] In one embodiment, the adjustment module 1 specifically includes:

[0146] The ONU adjustment unit is used to adjust the current filtering and receiving parameters of its own wavelength-selective optical filter according to the wavelength specified by the OLT for the ONU itself, so that its own wavelength-selective optical filter can receive optical signals including the wavelength specified by the ONU itself in the current filtering and receiving stage; and / or,

[0147] The OLT adjustment unit is used to dynamically allocate the specified wavelength of each ONU to the ONU and send the specified wavelength of the ONU to the corresponding ONU so that the corresponding ONU can adjust the current filtering and receiving parameters of its own wavelength selective optical filter, so that its own wavelength selective optical filter can receive optical signals including the specified wavelength of the ONU in the current filtering and receiving.

[0148] In this context, ONU stands for Optical Network Unit, and OLT stands for Optical Line Terminal.

[0149] In one embodiment, the OLT adjustment unit specifically includes:

[0150] The wavelength dynamic allocation subunit is used by the OLT to dynamically allocate different wavelengths to each ONU based on the network topology of the ONU distribution in the power grid, security partition information, the optical signal requirements of each ONU, and the filtering and receiving parameter range of its wavelength selective optical filter.

[0151] In one embodiment, the filtering module 2 specifically includes:

[0152] The ONU filtering unit, used for the ONU's wavelength-selective optical filter, filters the received wavelength-multiplexed optical signal from the OLT using its current filtering and receiving parameters, in order to obtain its own currently filtered and received optical signal from the wavelength-multiplexed optical signal. The OLT then dynamically routes and combines the ONU's specified wavelength optical signal into the corresponding wavelength-multiplexed optical signal; and / or,

[0153] The OLT filtering unit is used to send a wavelength multiplexed optical signal that combines the optical signal of the ONU with its own specified wavelength, so that the wavelength selective optical filter of the ONU can filter and receive the wavelength multiplexed optical signal through its own current filtering and receiving parameters, and obtain its own current filtering and receiving optical signal from the wavelength multiplexed optical signal.

[0154] In one embodiment, the OLT filtering unit specifically includes:

[0155] The wavelength multiplexing control subunit is used by the OLT to plan the number of wavelength channels according to the network topology of ONU distribution in the power grid, security partition information, and optical signal requirements of each ONU. It then uses dynamic routing to multiplex the optical signals of at least two ONUs with their own specified wavelengths to the same wavelength channel, and sends the multiplexed optical signals of at least two ONUs with their own specified wavelengths to the corresponding ONUs through the corresponding wavelength channels.

[0156] In one embodiment, the compensation module 3 specifically includes:

[0157] The ONU compensation unit is used to obtain the wavelength deviation between its current dominant wavelength of the currently filtered received optical signal and the wavelength specified by the ONU itself, and to compensate its current filtered received optical signal according to its own wavelength deviation to obtain the optical signal of the specified wavelength by the ONU itself; and / or,

[0158] The OLT compensation unit is used to enable the ONU to obtain the wavelength deviation between its current main wavelength of the currently filtered received optical signal and its own specified wavelength, and to compensate its current filtered received optical signal according to its own wavelength deviation in order to obtain the optical signal of its own specified wavelength.

[0159] In one embodiment, the compensation module 3 specifically includes:

[0160] The dominant wavelength identification unit is used to identify the position of the maximum spectral amplitude of the currently filtered received optical signal as the current dominant wavelength component, and to obtain the current dominant wavelength of the current dominant wavelength component;

[0161] The compensation value calculation unit is connected to the main wavelength identification unit and is used to calculate the wavelength deviation between the current main wavelength and the specified wavelength. In response to the wavelength deviation at the current moment meeting the preset conditions, the compensation value for the current moment of the filtered received optical signal is calculated using the PID standard control formula.

[0162] The compensation control unit, connected to the compensation value calculation unit, is used to compensate the currently filtered received optical signal according to the compensation value at the current moment through the PID controller in order to obtain a specified wavelength optical signal.

[0163] PID stands for proportional, integral, and derivative.

[0164] In one embodiment, the compensation value calculation unit specifically includes:

[0165] The deviation monitoring subunit is used to obtain the continuous usage time T of the same specified wavelength of the same wavelength selective optical filter, and to calculate the current dominant wavelength at each moment within the continuous usage time T. With the same specified wavelength wavelength deviation ,verify Is the absolute value greater than the preset threshold?

[0166] The compensation calculation subunit, connected to the deviation monitoring subunit, is used to calculate the current deviation if... If the absolute value is greater than the preset threshold, the compensation value for the current filtered received optical signal is calculated according to the following PID standard control formula:

[0167] ,

[0168] in, This is the compensation value at the current moment. = For wavelength deviation, For proportional gain, For integral gain, For differential gain, This is the integral term for the wavelength deviation. This is the differential term of the wavelength deviation. , , This was determined through the debugging and optimization of the same wavelength selective optical filter.

[0169] It is understood that the device described in this embodiment may be one of ONU and OLT, or a communication system including both.

[0170] Example 3:

[0171] like Figure 4 As shown, Embodiment 3 of this application provides a computer-readable storage medium storing a computer program. When the computer program is run by a processor, it implements the wavelength multiplexing filtering isolation communication method as described in Embodiment 1.

[0172] The computer-readable storage medium includes volatile or non-volatile, removable or non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, computer program units, or other data). Computer-readable storage media include, but are not limited to, RAM (Random Access Memory), ROM (Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), flash memory or other memory technologies, CD-ROM (Compact Disc Read-Only Memory), DVD or other optical disc storage, cartridges, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer.

[0173] like Figure 5As shown, this application can also provide a computer device including a memory and a processor. The memory stores a computer program, and when the processor runs the computer program stored in the memory, the processor executes the wavelength multiplexing filtering isolation communication method as described in Embodiment 1. This computer device can be the wavelength multiplexing filtering isolation communication device as described in Embodiment 2.

[0174] The memory is connected to the processor. The memory can be flash memory, read-only memory or other types of memory. The processor can be a central processing unit or a microcontroller.

[0175] Embodiments 1-3 of this application provide a wavelength multiplexing filtering isolation communication method, apparatus, and medium. By setting a wavelength selective optical filter, the filtering receiving parameters are adjusted according to the dynamically allocated specified wavelength. The wavelength multiplexed optical signal is received through the filtering receiving parameters, and the specified wavelength optical signal is obtained through compensation. Wavelength multiplexing saves resources, filtering compensation obtains accurate signals, and dynamic allocation and dynamic routing enhance signal security.

[0176] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this application, and this application is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this application, and these modifications and improvements are also considered to be within the scope of protection of this application.

Claims

1. A wavelength division multiplexed filtered isolated communication method, characterized by, The method includes: Adjust the current filtering and receiving parameters of the wavelength-selective optical filter according to the dynamically allocated specified wavelength; The wavelength-selective optical filter receives the wavelength-multiplexed optical signal through the current filtering and receiving parameters, and obtains the current filtered and received optical signal from the wavelength-multiplexed optical signal. The wavelength-multiplexed optical signal is combined with the specified wavelength optical signal through dynamic routing. The wavelength deviation between the current dominant wavelength and the specified wavelength of the currently filtered received optical signal is obtained, and the wavelength deviation is compensated to obtain the optical signal of the specified wavelength.

2. The method of claim 1, wherein, Based on the dynamically allocated specified wavelength, adjust the current filtering and receiving parameters of the wavelength-selective optical filter, specifically including: The ONU adjusts the current filtering and receiving parameters of its wavelength-selective optical filter based on the wavelength dynamically assigned to it by the OLT, so that its wavelength-selective optical filter can receive optical signals including those of the wavelengths assigned to it; and / or, The OLT dynamically allocates a wavelength specified by each ONU and sends the wavelength specified by the ONU to the corresponding ONU so that the corresponding ONU can adjust the current filtering and receiving parameters of its wavelength selective optical filter, so that its wavelength selective optical filter can receive optical signals including the wavelength specified by the ONU itself in the current filtering and receiving. In this context, ONU stands for Optical Network Unit, and OLT stands for Optical Line Terminal.

3. The method of claim 2, wherein, The OLT dynamically allocates wavelengths specified by each ONU, specifically including: Based on the network topology of ONU distribution within the power grid, security partition information, the optical signal requirements of each ONU, and the filtering and receiving parameter range of its wavelength-selective optical filter, the OLT dynamically assigns different wavelengths to each ONU.

4. The method according to claim 3, characterized in that, The wavelength-selective optical filter receives the wavelength-multiplexed optical signal using the current filtering and receiving parameters, and extracts the currently filtered and received optical signal from the wavelength-multiplexed optical signal. The wavelength-multiplexed optical signal is dynamically routed to combine a specified wavelength optical signal, specifically including: The ONU's wavelength-selective optical filter filters the received wavelength-multiplexed optical signal from the OLT using its current filtering and receiving parameters, thereby obtaining its own currently filtered and received optical signal from the wavelength-multiplexed optical signal. The OLT then dynamically routes and combines the ONU's specified wavelength optical signal into the corresponding wavelength-multiplexed optical signal; and / or, The OLT sends a wavelength-multiplexed optical signal to the ONU, which is dynamically routed and incorporates the ONU's own specified wavelength optical signal. This allows the ONU's wavelength-selective optical filter to filter and receive the wavelength-multiplexed optical signal using its current filtering and receiving parameters, thereby obtaining its own current filtered and received optical signal from the wavelength-multiplexed optical signal.

5. The method according to claim 4, characterized in that, The OLT sends a wavelength-multiplexed optical signal to the ONU, which is dynamically routed and incorporates the ONU's own specified wavelength optical signal. Specifically, this includes: Based on the network topology of ONU distribution within the power grid, security partition information, and the optical signal requirements of each ONU, the OLT plans the number of wavelength channels, sets up and multiplexes the optical signals of at least two ONUs with their own specified wavelengths to the same wavelength channel through dynamic routing, and sends the set up and multiplexed optical signals of at least two ONUs with their own specified wavelengths to the corresponding ONUs through the corresponding wavelength channels.

6. The method according to claim 5, characterized in that, The process involves obtaining the wavelength deviation between the current dominant wavelength and the specified wavelength of the currently filtered received optical signal, compensating for this wavelength deviation to obtain the optical signal at the specified wavelength. Specifically, this includes: The ONU obtains the wavelength deviation between its current dominant wavelength of the currently filtered received optical signal and its own specified wavelength, and compensates for this wavelength deviation to obtain the optical signal at its own specified wavelength; and / or, The OLT enables the ONU to obtain the wavelength deviation between its current dominant wavelength of the currently filtered received optical signal and the wavelength specified by the ONU, and to compensate for the wavelength deviation of its current filtered received optical signal in order to obtain the optical signal of the specified wavelength of the ONU.

7. The method according to any one of claims 1-6, characterized in that, The process involves obtaining the wavelength deviation between the current dominant wavelength and the specified wavelength of the currently filtered received optical signal, compensating for this wavelength deviation to obtain the optical signal at the specified wavelength. Specifically, this includes: Identify the position of the maximum spectral amplitude of the currently filtered received optical signal as the current dominant wavelength component, and obtain the current dominant wavelength of the current dominant wavelength component; Calculate the wavelength deviation between the current main wavelength and the specified wavelength. In response to the wavelength deviation at the current moment meeting the preset conditions, use the PID standard control formula to calculate the compensation value for the current moment of the currently filtered received optical signal. The PID controller compensates the currently filtered received optical signal based on the current compensation value to obtain an optical signal of the specified wavelength. PID stands for proportional, integral, and derivative.

8. The method according to claim 7, characterized in that, The wavelength deviation between the current dominant wavelength and the specified wavelength is calculated. In response to the wavelength deviation at the current moment satisfying a preset condition, the compensation value for the current moment of the filtered received optical signal is calculated using the standard PID control formula. Specifically, this includes: Obtain the duration T of use for the same specified wavelength of the same wavelength selective optical filter, and calculate the current dominant wavelength at each moment within the duration T. With the same specified wavelength wavelength deviation ,verify Is the absolute value greater than the preset threshold? If at the current moment If the absolute value is greater than the preset threshold, the compensation value for the current filtered received optical signal is calculated according to the following PID standard control formula: ， in, This is the compensation value at the current moment. = For wavelength deviation, For proportional gain, For integral gain, For differential gain, This is the integral term for the wavelength deviation. This is the differential term of the wavelength deviation. , , This was determined through the debugging and optimization of the same wavelength selective optical filter.

9. A wavelength multiplexing filtering isolation communication device, characterized in that, The device includes: The adjustment module is used to adjust the current filtering and receiving parameters of the wavelength-selective optical filter according to the dynamically allocated specified wavelength; The filtering module, connected to the adjustment module, is used by the wavelength selective optical filter to receive the wavelength multiplexed optical signal through the current filtering and receiving parameters, so as to obtain the current filtered and received optical signal from the wavelength multiplexed optical signal. The wavelength multiplexed optical signal is combined with the specified wavelength optical signal through dynamic routing. The compensation module, connected to the filtering module, is used to obtain the wavelength deviation between the current dominant wavelength and the specified wavelength of the currently filtered received optical signal, and to compensate the currently filtered received optical signal according to the wavelength deviation to obtain the specified wavelength optical signal.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the wavelength multiplexing filtering isolation communication method as described in any one of claims 1-8.

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