Power communication network collaborative protection method and system based on OSU and ASON

Abstract

The present invention relates to the field of power communication technologies, and particularly to a method and system for collaborative protection of a power communication network based on OSU and ASON, including dynamically configuring bandwidth resource granularities for different services and establishing an optical service unit protection mechanism at the electrical layer; performing lossless bandwidth adjustment on abnormal services through the optical service unit protection mechanism at the electrical layer to obtain service bandwidth resource adjustment information; configuring primary and standby optical paths for various services based on the service bandwidth resource adjustment information, and determining whether to trigger an optical layer protection switching mechanism based on the real-time status of the primary and standby optical paths and the protection status of the electrical layer automatic switched optical network; in response to the trigger signal of the optical layer protection switching mechanism, constructing and solving an optoelectronic collaborative optimization model with the goal of minimizing the optoelectronic layer switching delay to obtain an optoelectronic collaborative optimization protection strategy. By integrating the protection resources of the electrical layer and the optical layer, the present invention ensures that services can be quickly restored in the event of a fault, guaranteeing the continuity and stability of the power communication network.

Description

Technical Field

[0001] The present invention relates to the technical field of power communication, and in particular to a method and system for collaborative protection of a power communication network based on OSU and ASON. Background Art

[0002] With the acceleration of the digital transformation of the power industry, as an important support system for the operation of the power grid, the reliability and efficiency of the power communication network are crucial for ensuring the safe and stable operation of the power grid. The existing power communication networks mainly rely on the Optical Transport Network (OTN for short) and the Automatically Switched Optical Network (ASON for short) technology. However, with the increasing complexity of the network topology, the dynamic change of service traffic, and the frequent occurrence of sudden faults, the traditional protection mechanisms gradually expose some limitations. Specifically, although the optical layer 1+1 protection mechanism can provide high reliability, it requires reserved fixed wavelength resources, making it difficult to flexibly adapt to the dynamically changing service requirements and resulting in low resource utilization efficiency; while the protection mechanism based on the Optical Service Unit (OSU for short) at the electrical layer is relatively rough in terms of bandwidth adjustment granularity, unable to achieve refined resource allocation, and this protection mechanism cannot achieve millisecond-level fault recovery. When a fault occurs in the network, the interruption time of services is relatively long, making it difficult to meet the requirements of high reliability and low latency of the power communication network.

[0003] Therefore, there are many problems with the existing power communication network protection mechanisms in dealing with complex network environments and diverse service requirements, making it difficult to meet the needs of the power communication system for an efficient and reliable protection scheme, and seriously restricting the reliability and resource utilization efficiency of the power communication network. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a method and system for collaborative protection of a power communication network based on OSU and ASON.

[0005] In a first aspect, the present invention provides a method for collaborative protection of a power communication network based on OSU and ASON, the method comprising the following steps:

[0006] Dynamically configure the bandwidth resource granularity for different services according to the priorities and bandwidth requirements of various services in the power communication network, and establish an electrical layer optical service unit protection mechanism based on the optical service unit;

[0007] Identify abnormal services when a fault occurs according to the real-time monitored electrical layer network status, and perform lossless bandwidth adjustment on the abnormal services through the electrical layer optical service unit protection mechanism to obtain service bandwidth resource adjustment information;

[0008] Configure primary and standby optical paths for various services based on the power communication network topology and service bandwidth resource adjustment information, and determine whether to trigger the optical layer protection switching mechanism based on the real-time status of the primary and standby optical paths and the protection status of the electrical layer automatic switched optical network;

[0009] In response to the optical layer protection switching mechanism trigger signal, with the goal of minimizing the optical and electrical layer switching delay, construct an optical and electrical collaborative optimization model according to the current network status and real-time service bandwidth requirements;

[0010] Solve the optical and electrical collaborative optimization model to obtain an optical and electrical collaborative optimization protection strategy, and perform collaborative scheduling control on the optical and electrical collaborative protection devices in the power communication network according to the optical and electrical collaborative optimization protection strategy.

[0011] In a further embodiment, the step of dynamically configuring bandwidth resource granularity for different services according to the priorities and bandwidth requirements of various services in the power communication network and establishing an electrical layer optical service unit protection mechanism based on optical service units includes:

[0012] Divide priorities according to power communication service types, and determine the priority coefficients corresponding to each power communication service type;

[0013] Real-time monitor the bandwidth demand information of various power communication services, and calculate the actually allocated bandwidth according to the bandwidth demand information of various power communication services and the priority coefficients;

[0014] Pre-establish optical service unit protection connections for various power communication services in the electrical layer automatic switched optical network; the optical service unit protection connections include primary optical service unit connections and protection optical service unit connections;

[0015] Configure bandwidth resources for the optical service unit protection connections according to the actually allocated bandwidth to obtain the primary connection bandwidth and the protection connection bandwidth;

[0016] Based on the primary connection bandwidth and the protection connection bandwidth, establish an electrical layer optical service unit protection mechanism based on optical service units in the electrical layer automatic switched optical network.

[0017] In a further embodiment, the step of identifying abnormal services during a fault according to the real-time monitored electrical layer network status includes:

[0018] Real-time monitor the electrical layer network status, and detect whether a fault occurs in the electrical layer network according to the electrical layer network status; wherein, the electrical layer network status includes link status, node device status, service transmission status, and fault detection signals in the electrical layer network;

[0019] When a fault occurs in the electrical layer network, determine the location where the fault occurs according to the fault detection signal, and identify abnormal services from the power communication services associated with the location where the fault occurs according to the link status, node device status, and service transmission status at the location where the fault occurs.

[0020] In a further embodiment, the step of performing lossless bandwidth adjustment on the abnormal service through the electrical layer optical service unit protection mechanism to obtain service bandwidth resource adjustment information includes:

[0021] Identify the links in the electrical layer network that need to be protected according to the transmission path of the abnormal service and the location where the fault occurs, form a set of protection links, and determine the bandwidth resources required for each abnormal service according to the current state and service priority of the abnormal service;

[0022] Calculate the additional delay generated by each link due to the bandwidth adjustment of the electrical layer optical service unit protection mechanism according to the adjustment speed of the electrical layer optical service unit protection mechanism and the physical characteristics of each link in the set of protection links;

[0023] Calculate the link bandwidth adjustment cost according to the protection failure rate, blocking rate, and resource utilization rate of each link in the set of protection links;

[0024] Perform lossless bandwidth adjustment on each link in the set of protection links according to the bandwidth resources required for the abnormal service, the link bandwidth adjustment cost, and the additional delay to obtain service bandwidth resource adjustment information.

[0025] In a further embodiment, the step of configuring primary and backup optical paths for various services based on the power communication network topology and service bandwidth resource adjustment information includes:

[0026] Analyze the optical layer topology structure of the power communication network to obtain power communication network topology information, and construct a power communication network topology model according to the power communication network topology information;

[0027] Use the shortest path algorithm to find the primary optical path from the source node to the sink node in the power communication network topology model that meets the service bandwidth resource adjustment information and the shortest delay requirement;

[0028] Find a path without overlapping links or nodes with the primary optical path in the power communication network topology model as the backup optical path.

[0029] In a further embodiment, during the process of configuring primary and backup optical paths for various services, the primary optical path and the backup optical path are configured with the same wavelength resources, and wavelength resources that meet the wavelength continuity constraint are reserved for the primary and backup optical paths of each power communication service in the power communication network.

[0030] In a further embodiment, the step of determining whether to trigger the optical layer protection switching mechanism based on the real-time status of the primary and standby optical paths and the protection status of the electrical layer automatically switched optical network includes:

[0031] Real-time monitor the primary and standby optical paths and the electrical layer automatically switched optical network to obtain the real-time status of the primary and standby optical paths and the protection status of the electrical layer automatically switched optical network;

[0032] Detect the electrical layer allocated bandwidth of the primary and standby optical paths according to the real-time status of the primary and standby optical paths, and determine that the electrical layer protection fails when the electrical layer allocated bandwidth of the primary and standby optical paths does not meet the preset service protection requirement bandwidth;

[0033] Detect the remaining electrical layer bandwidth according to the protection status of the electrical layer automatically switched optical network, and determine that the remaining electrical layer bandwidth resource is insufficient when the remaining electrical layer bandwidth does not meet the preset service protection requirement bandwidth;

[0034] Trigger the optical layer protection switching mechanism when it is detected that the electrical layer protection fails or the remaining electrical layer bandwidth resource is insufficient.

[0035] In a further embodiment, the step of constructing an optical and electrical collaborative optimization model with the optimization goal of minimizing the optical and electrical layer switching delay in response to the optical layer protection switching mechanism trigger signal according to the current network status and the real-time bandwidth demand of the service includes:

[0036] After receiving the optical layer protection switching mechanism trigger signal, obtain the current network status of the power communication network, and obtain the link transmission delay, the link bandwidth consumption cost, and the remaining link wavelength resources according to the current network status;

[0037] Calculate the optical layer protection cost of each link based on the link transmission delay, the link bandwidth consumption cost, and the remaining link wavelength resources;

[0038] Calculate the electrical layer protection cost of each link according to the link bandwidth adjustment cost and the additional delay;

[0039] Construct an optical and electrical collaborative optimization model with the optimization goal of minimizing the optical and electrical layer switching delay according to the optical layer protection cost and the electrical layer protection cost.

[0040] In a further embodiment, the optical and electrical collaborative optimization protection strategy is obtained by solving through a particle swarm algorithm.

[0041] In a second aspect, the present invention provides a power communication network collaborative protection system based on OSU and ASON, and the system includes:

[0042] A protection establishment module, which is used to dynamically configure the bandwidth resource granularity for different services according to the priorities and bandwidth requirements of various services in the power communication network, and establish an electrical-layer optical service unit protection mechanism based on optical service units;

[0043] A bandwidth adjustment module, which is used to identify abnormal services during a fault according to the real-time monitored electrical-layer network status, and perform lossless bandwidth adjustment on the abnormal services through the electrical-layer optical service unit protection mechanism to obtain service bandwidth resource adjustment information;

[0044] An optical-layer switching module, which is used to configure primary and backup optical paths for various services based on the power communication network topology and service bandwidth resource adjustment information, and determine whether to trigger the optical-layer protection switching mechanism based on the real-time status of the primary and backup optical paths and the electrical-layer automatic switched optical network protection status;

[0045] A model construction module, which is used to respond to the optical-layer protection switching mechanism trigger signal, take minimizing the optical and electrical-layer switching delay as the optimization goal, and construct an optical and electrical collaborative optimization model according to the current network status and service real-time bandwidth requirements;

[0046] A collaborative protection module, which is used to solve the optical and electrical collaborative optimization model to obtain an optical and electrical collaborative optimization protection strategy, and perform collaborative scheduling control on the optical and electrical collaborative protection devices in the power communication network according to the optical and electrical collaborative optimization protection strategy.

[0047] The present invention provides a method and system for collaborative protection of a power communication network based on OSU and ASON. The method dynamically configures the bandwidth resource granularity for different services according to the priorities and bandwidth requirements of various services in the power communication network, and establishes an electrical-layer optical service unit protection mechanism based on optical service units; identifies abnormal services during a fault according to the real-time monitored electrical-layer network status, and performs lossless bandwidth adjustment on the abnormal services through the electrical-layer optical service unit protection mechanism to obtain service bandwidth resource adjustment information; configures primary and backup optical paths for various services based on the power communication network topology and service bandwidth resource adjustment information, and determines whether to trigger the optical-layer protection switching mechanism based on the real-time status of the primary and backup optical paths and the electrical-layer automatic switched optical network protection status; responds to the optical-layer protection switching mechanism trigger signal, takes minimizing the optical and electrical-layer switching delay as the optimization goal, and constructs an optical and electrical collaborative optimization model according to the current network status and service real-time bandwidth requirements; solves the optical and electrical collaborative optimization model to obtain an optical and electrical collaborative optimization protection strategy, and performs collaborative scheduling control on the optical and electrical collaborative protection devices in the power communication network according to the optical and electrical collaborative optimization protection strategy. Compared with the prior art, this method dynamically integrates the protection resources of the electrical layer and the optical layer according to the service priorities and bandwidth requirements, realizes fast recovery and an optical and electrical collaborative optimization protection mechanism under network faults, meets the requirements of the power communication network for high reliability, flexibility and efficiency, and ensures the continuity and stability of the power communication network. Description of the Drawings

[0048] Figure 1 It is a schematic flow diagram of the collaborative protection method for a power communication network based on OSU and ASON provided by an embodiment of the present invention;

[0049] Figure 2 It is a schematic diagram of the protection mechanism for the electrical layer optical service unit provided by an embodiment of the present invention;

[0050] Figure 3 It is a block diagram of the collaborative protection system for a power communication network based on OSU and ASON provided by an embodiment of the present invention. Specific embodiments

[0051] The following specifically illustrates the implementation manner of the present invention in conjunction with the drawings. The given embodiments are only for illustrative purposes and should not be construed as limiting the present invention. The included drawings are only for reference and explanation and do not constitute a limitation on the protection scope of the present invention patent, because many changes can be made to the present invention without departing from the spirit and scope of the present invention.

[0052] Refer to Figure 1 , an embodiment of the present invention provides a collaborative protection method for a power communication network based on OSU and ASON. As Figure 1 shown, the method includes the following steps:

[0053] S1. Dynamically configure the bandwidth resource granularity for different services according to the priority and bandwidth requirements of various services in the power communication network, and establish a protection mechanism for the electrical layer optical service unit based on the optical service unit.

[0054] In some embodiments, the step of dynamically configuring the bandwidth resource granularity for different services according to the priority and bandwidth requirements of various services in the power communication network and establishing a protection mechanism for the electrical layer optical service unit based on the optical service unit includes:

[0055] Divide the priority according to the power communication service type, and determine the priority coefficient corresponding to each power communication service type;

[0056] Real-time monitor the bandwidth requirement information of various power communication services, and calculate the actually allocated bandwidth according to the bandwidth requirement information of various power communication services and the priority coefficient;

[0057] Pre-establish an optical service unit protection connection for various power communication services in the electrical layer automatic switched optical network; the optical service unit protection connection includes a primary optical service unit connection and a protection optical service unit connection;

[0058] Configure the bandwidth resources for the optical service unit protection connection according to the actually allocated bandwidth to obtain the primary connection bandwidth and the protection connection bandwidth;

[0059] Based on the primary connection bandwidth and the protection connection bandwidth, an optical service unit-based electrical layer optical service unit protection mechanism is established in an automatically switched optical network (ASON).

[0060] Specifically, in this embodiment, various services in the power communication network are analyzed, and the services are divided into different priorities according to the importance of the services and the sensitivity to delay and bandwidth, such as high priority, medium priority, and low priority. A priority coefficient is assigned to each priority according to the divided priority level. The larger the value of the priority coefficient, the more priority is given to the service in bandwidth allocation, and the service can obtain relatively more bandwidth resources to meet its high-priority requirements. At the same time, in this embodiment, through the bandwidth monitoring device in the power communication network, the bandwidth demand information of various services is monitored in real time. According to the monitored bandwidth demand information and the service priority coefficient, the actual allocated bandwidth is calculated. The calculation formula for the actual allocated bandwidth is:

[0061]

[0062] In the formula, is the actual allocated bandwidth of the i-th service; is the priority coefficient of the i-th service, ; is the bandwidth required by the i-th service.

[0063] Then, in this embodiment, by using the lossless bandwidth adjustment ability of the optical service unit and the fine bandwidth granularity of 2.6 Mb / s, when the service bandwidth demand is low and unstable, the OSU protection bandwidth granularity is pre-configured for various services. In the automatically switched optical network (ASON), protection connections for optical service units (OSUs) are established in advance for various services. The optical service unit protection connection includes a primary OSU connection and a protection OSU connection. According to the calculated actual allocated bandwidth, the primary connection bandwidth and the protection connection bandwidth are configured for the optical service unit protection connection in a certain proportion. According to the bandwidth allocation result, the bandwidths of the primary OSU connection and the protection OSU connection are determined. Based on the primary connection bandwidth and the protection connection bandwidth, protection strategies for the OSU-P protection mechanism are configured, such as a failover strategy, a bandwidth recovery strategy, etc. The electrical layer optical service unit protection mechanism (OSU-P protection mechanism) is implemented in the electrical layer ASON to ensure that when a service fails, it can quickly switch to the protection connection and resume service transmission. This electrical layer optical service unit protection mechanism can efficiently utilize network resources, ensure the reliability and stability of various services, and provide a strong guarantee for the stable operation of the power communication network.

[0064] S2. Identify the abnormal services at the time of fault occurrence based on the real-time monitored electrical layer network status, and perform lossless bandwidth adjustment on the abnormal services through the electrical layer optical service unit protection mechanism to obtain service bandwidth resource adjustment information.

[0065] In some embodiments, the step of identifying the abnormal services at the time of fault occurrence based on the real-time monitored electrical layer network status includes:

[0066] Real-time monitor the electrical layer network status, and detect whether a fault occurs in the electrical layer network according to the electrical layer network status; wherein, the electrical layer network status includes link status, node device status, service transmission status, and fault detection signal in the electrical layer network;

[0067] When it is monitored that a fault occurs in the electrical layer network, determine the fault occurrence location according to the fault detection signal, and identify the abnormal services from the power communication services associated with the fault occurrence location according to the link status, node device status, and service transmission status at the fault occurrence location.

[0068] Specifically, in this embodiment, sensors and monitoring devices deployed in the network are used to collect the link status, node device status, service transmission status, and fault detection signal of the electrical layer network in real time to form the electrical layer network status, and the collected electrical layer network status is analyzed through a preset threshold to determine whether the electrical layer network is in a normal state. When it is found that any of the data in the link status, node device status, service transmission status, and fault detection signal exceeds the threshold, a fault alarm mechanism is triggered. For example, when the bit error rate of the link exceeds the corresponding preset threshold or the node device sends a fault alarm, it is determined that a fault has occurred in the electrical layer network. In this embodiment, the fault occurrence location is determined according to the fault detection signal, and the affected abnormal services are found from the power communication services associated with the fault location by combining the link status, node device status, and service transmission status at the fault location. For example, for the services passing through the faulty link, if their transmission is interrupted or the quality drops severely, they are identified as abnormal services. It should be noted that when a fault occurs in the electrical layer network, the electrical layer optical service unit protection mechanism (OSU-P protection mechanism) can quickly restore the bandwidth resources of the affected services by dynamically adjusting the bandwidth policy. The OSU technology has the function of lossless bandwidth adjustment, which not only ensures the integrity of data during the fault recovery process, avoids the risk of data loss, but also significantly reduces the pressure of resource competition. For services with different priorities, the OSU-P protection mechanism guarantees more reliable bandwidth for high-priority services by dynamically adjusting the bandwidth, as Figure 2 shown, the OSU-P protection mechanism pre-establishes a smaller OSU protection connection bandwidth for customer services , after a fault occurs, the OSU connections on the protection path quickly adjust the initial bandwidth to the bandwidth required by the service through a lossless bandwidth adjustment mechanism and simultaneously perform protection switching. Since only limited bandwidth resources are reserved in the initial stage of the protection connection, the OSU-P protection mechanism can save a large amount of network protection resources. In some embodiments, the step of performing lossless bandwidth adjustment on the abnormal service through the optical service unit protection mechanism of the electrical layer to obtain service bandwidth resource adjustment information includes:

[0069] Identify the links in the electrical layer network that need to be protected according to the transmission path of the abnormal service and the location where the fault occurs, form a set of protection links, and determine the bandwidth resources required for each abnormal service according to the current state and service priority of the abnormal service;

[0070] Calculate the additional delay generated by each link due to the bandwidth adjustment of the optical service unit protection mechanism of the electrical layer according to the adjustment speed of the optical service unit protection mechanism of the electrical layer and the physical characteristics of each link in the set of protection links;

[0071] Calculate the link bandwidth adjustment cost according to the protection failure rate, blocking rate, and resource utilization rate of each link in the set of protection links;

[0072] Perform lossless bandwidth adjustment on each link in the set of protection links according to the bandwidth resources required for the abnormal service, the link bandwidth adjustment cost, and the additional delay to obtain service bandwidth resource adjustment information.

[0073] Specifically, in this embodiment, the links in the electrical layer network that need to be protected are identified according to the transmission path of the abnormal service and the location where the fault occurs, and a set of protection links is formed. Considering the current state and service priority of the abnormal service, the bandwidth resources required for each abnormal service after the fault occurs are determined. Since the physical characteristics of different links (such as link length, transmission medium, etc.) will affect the signal transmission delay, in this embodiment, the additional delay generated by each link due to bandwidth adjustment is calculated by combining the physical characteristic parameters of each link (such as length, attenuation, etc.). At the same time, this embodiment comprehensively considers factors such as protection failure rate, blocking rate, and resource utilization rate to calculate the link bandwidth adjustment cost. Among them, the protection failure rate reflects the probability of protection failure during the protection process of the link; the blocking rate represents the probability that the link is occupied by other services and cannot provide the required bandwidth; the resource utilization rate reflects the current bandwidth usage situation of the link. The link bandwidth adjustment cost comprehensively reflects the cost and risk required for bandwidth adjustment on this link. This embodiment designs an electrical layer network protection scheme based on the OSU small-granularity bandwidth and lossless adjustment characteristics, which can restore more services while minimizing resource waste and the number of bandwidth adjustments. The electrical layer protection cost objective function is specifically expressed as:

[0074]

[0075] Among them,

[0076]

[0077] In the formula, considering that the electrical layer uses the OSU technology to achieve lossless bandwidth dynamic adjustment, let the set of protection links involved in the electrical layer protection process be Q. For each protection link in the electrical layer ; is the electrical layer protection cost; is the delay weight; is the additional delay generated by link q due to the bandwidth adjustment of the electrical layer optical service unit protection mechanism; is the link bandwidth adjustment weight; is the link bandwidth adjustment cost; Q is the set of protection links; is the blocking rate weight coefficient; is the blocking rate; is the resource utilization weight coefficient; is the resource utilization rate; is the protection failure rate.

[0078] In this embodiment, when adjusting the bandwidth, it fully considers the bandwidth resources required by abnormal services, the link bandwidth adjustment cost, and the additional delay, and performs lossless bandwidth adjustment on each link in the protection link set. For example, for a link with a lower bandwidth adjustment cost and a smaller additional delay, it can be preferentially selected for bandwidth adjustment to meet the bandwidth requirements of abnormal services; while for a link with a higher bandwidth adjustment cost or a larger additional delay, careful adjustment is required to avoid having a greater impact on network performance. Finally, based on the bandwidth adjustment results of each link, a complete service bandwidth resource adjustment information is formed, which details the bandwidth allocation of each abnormal service in the protection link set, as well as the corresponding adjustment strategies and parameters, providing a basis for subsequent service restoration and network optimization. In summary, based on the small-granularity bandwidth adjustment ability and lossless bandwidth adjustment advantage of the OSU technology, this embodiment realizes a network protection scheme that can restore more services, while minimizing resource waste and the number of bandwidth adjustments. Using the OSU-P protection mechanism, a smaller OSU protection connection bandwidth is pre-established for customer services, and the bandwidth is quickly adjusted to the required value after a failure. By dynamically adjusting the bandwidth of the OSU connection, the affected abnormal services are quickly restored to other normal links without losing data during the adjustment process, and finally the service bandwidth resource adjustment information is obtained, ensuring the continuity and reliability of power communication services.

[0079] S3. Configure primary and standby optical paths for various services based on the power communication network topology and service bandwidth resource adjustment information, and determine whether to trigger the optical layer protection switching mechanism based on the real-time status of the primary and standby optical paths and the electrical layer automatic switched optical network protection status.

[0080] In some embodiments, the step of configuring primary and backup optical paths for various services based on the power communication network topology and service bandwidth resource adjustment information includes:

[0081] Analyze the optical layer topology structure of the power communication network to obtain the power communication network topology information, and construct a power communication network topology model according to the power communication network topology information;

[0082] Use the shortest path algorithm to find the primary optical path that meets the service bandwidth resource adjustment information and the shortest delay requirement from the source node to the sink node in the power communication network topology model;

[0083] Find a path without overlapping links or nodes with the primary optical path in the power communication network topology model as the backup optical path.

[0084] In this embodiment, a 1+1 optical layer protection mechanism is established to configure primary and backup paths for each service. The service is transmitted through two optical paths in a dual-transmission and selective-reception manner. When the electrical layer protection fails, it is switched to the optical layer protection based on the automatically switched optical network (ASON) to ensure the highly reliable transmission of critical services. The specific process is as follows: Analyze the optical layer topology structure of the power communication network to obtain information such as the positions of all nodes, the connection relationships of optical fiber links, and the wavelength resource distribution in the power communication network, forming the topology information of the power communication network. Then, organize the collected topology information of the power communication network and construct a topology model of the power communication network using the graph structure in graph theory. This model should be able to accurately reflect the physical structure and resource distribution of the network. Here, the nodes represent each site in the power communication network, the edges represent the optical fiber links between the nodes, and the weights on the edges can represent attributes such as the bandwidth and delay of the links. In this embodiment, according to the service bandwidth resource adjustment information, determine the required service bandwidth and delay requirements for transmission. In the topology model of the power communication network, with the source node and the destination node as the starting and ending points, shortest path algorithms such as the Dijkstra algorithm calculate the shortest path from the source node to the destination node with the delay as the weight, and search for the primary optical path that meets the service bandwidth resource adjustment information and the shortest delay requirement. During the search process, comprehensively consider factors such as the bandwidth resources, delay characteristics of the links, and the priority of the services to ensure that the selected path can provide reliable transmission guarantee for the service to find the optimal path. At the same time, in the topology model of the power communication network, this embodiment searches for a path without overlapping links or nodes with the primary optical path as the backup optical path. This can ensure that when the primary optical path fails, the backup optical path can independently undertake the service transmission task and improve the reliability of the network. When searching for the backup optical path, this embodiment can adopt an algorithm similar to that for searching for the primary optical path. However, during the path selection process, this embodiment configures the primary optical path and the backup optical path with the same wavelength resources. This can facilitate quick switching between the primary and backup paths, reduce the complexity and time delay during switching. At the same time, to ensure that the backup optical path can work properly when the primary optical path fails, the backup optical path should have no overlapping links or nodes with the primary optical path, and the primary and backup optical paths should be configured with the same wavelength resources to ensure that the wavelength does not need to be changed during switching. In addition, this embodiment should reserve wavelength resources that meet the wavelength continuity constraint for the primary and backup optical paths of each power communication service in the power communication network to ensure that there are no conflicts and discontinuities in wavelength allocation and guarantee the stability and continuity of service transmission.

[0085] In some embodiments, the step of determining whether to trigger the optical layer protection switching mechanism based on the real-time states of the primary and backup optical paths and the protection state of the electrical layer automatically switched optical network includes:

[0086] Real-time monitor the primary and backup optical paths and the electrical layer automatically switched optical network to obtain the real-time states of the primary and backup optical paths and the protection state of the electrical layer automatically switched optical network;

[0087] Detect the electrical layer allocated bandwidth of the primary and standby optical paths according to the real-time status of the primary and standby optical paths, and determine that the electrical layer protection fails when the electrical layer allocated bandwidths of the primary and standby optical paths do not meet the preset service protection required bandwidth;

[0088] Detect the remaining bandwidth of the electrical layer according to the protection status of the electrical layer automatic switched optical network, and determine that the remaining bandwidth resources of the electrical layer are insufficient when the remaining bandwidth of the electrical layer does not meet the preset service protection required bandwidth;

[0089] When it is detected that the electrical layer protection fails or the remaining bandwidth resources of the electrical layer are insufficient, trigger the optical layer protection switching mechanism.

[0090] Specifically, in this embodiment, real-time monitoring devices are deployed in the network to monitor the primary and standby optical paths and the electrical layer automatic switched optical network in real time. The real-time status of the primary and standby optical paths (such as bandwidth occupancy, optical signal quality, etc.) and the protection status of the electrical layer automatic switched optical network (such as remaining bandwidth, protection path status, etc.) are collected through the monitoring devices. In this embodiment, the electrical layer allocated bandwidths of the primary and standby optical paths are compared with the service protection required bandwidth for the size relationship. When the electrical layer allocated bandwidths of the primary and standby optical paths do not meet the preset service protection required bandwidth, it is determined that the electrical layer protection fails, which is specifically expressed as:

[0091]

[0092] In the formula, is the electrical layer protection failure judgment variable. When its value is True, it indicates that the electrical layer protection fails; is the electrical layer allocated bandwidth; is the service protection required bandwidth, which is the minimum bandwidth required for the normal operation of the service.

[0093] This embodiment obtains the remaining bandwidth of the electrical layer automatic switched optical network, and compares the remaining bandwidth of the electrical layer with the service protection required bandwidth for the size relationship. When the remaining bandwidth is not enough to meet the future service protection requirements (that is, when the remaining bandwidth is less than or equal to the future required bandwidth), it is determined that the remaining bandwidth resources of the electrical layer are insufficient, which is specifically expressed as:

[0094]

[0095] In the formula, is the remaining bandwidth of the electrical layer, that is, the bandwidth resources in the electrical layer network that have not been allocated or used.

[0096] When any one of the conditions of electrical layer protection failure or insufficient remaining bandwidth of the electrical layer is met, trigger the optical layer protection switching mechanism, and switch the service from the electrical layer protection path to the optical layer protection path through the optical layer protection switching mechanism to ensure the continuity and reliability of the service. The conditions for triggering the optical layer protection switching mechanism are specifically expressed as:

[0097]

[0098] In the formula, is the logical judgment variable for triggering the optical layer protection switching mechanism. When its value is True, it indicates that the optical layer protection switching mechanism needs to be triggered.

[0099] S4. In response to the optical layer protection switching mechanism trigger signal, with the goal of minimizing the optical and electrical layer switching delay, construct an optical and electrical collaborative optimization model according to the current network state and the real-time bandwidth requirements of the service.

[0100] S5. Solve the optical and electrical collaborative optimization model to obtain an optical and electrical collaborative optimization protection strategy, and perform collaborative scheduling control on the optical and electrical collaborative protection devices in the power communication network according to the optical and electrical collaborative optimization protection strategy.

[0101] In some embodiments, the step of constructing an optical and electrical collaborative optimization model according to the current network state and the real-time bandwidth requirements of the service in response to the optical layer protection switching mechanism trigger signal with the goal of minimizing the optical and electrical layer switching delay includes:

[0102] After receiving the optical layer protection switching mechanism trigger signal, obtain the current network state of the power communication network, and obtain the link transmission delay, link bandwidth consumption cost, and remaining wavelength resources of the link according to the current network state;

[0103] Calculate the optical layer protection cost of each link according to the link transmission delay, link bandwidth consumption cost, and remaining wavelength resources of the link;

[0104] Calculate the electrical layer protection cost of each link according to the link bandwidth adjustment cost and the additional delay;

[0105] With the goal of minimizing the optical and electrical layer switching delay, construct an optical and electrical collaborative optimization model according to the optical layer protection cost and the electrical layer protection cost.

[0106] Specifically, to ensure the highly reliable transmission of critical services, this embodiment adopts an optical layer 1+1 protection mechanism. This mechanism configures primary and backup optical paths for each service. Service data is sent simultaneously through two optical paths and selectively received. When the OAM (Operation, Administration, and Maintenance) system in the power communication network detects a failure of the electrical layer ASON protection or a failure of the primary optical path in the optical layer, it will immediately trigger a signal for the optical layer protection switching mechanism in the automatically switched optical network. This trigger signal indicates that the current electrical layer protection mechanism cannot meet the service requirements and optical-electric collaborative protection switching is needed to ensure the highly reliable transmission of critical services. This embodiment reallocates network resources through the optical layer 1+1 protection mechanism, which is usually completed within milliseconds, sufficient to meet services with strict delay requirements such as power communication. After receiving the trigger signal, this embodiment obtains the current status information of the power communication network through the network management system. The current status information of the power communication network includes data such as the transmission delay, bandwidth consumption, and remaining wavelength resources of each link. Based on the current status information of the power communication network, the transmission delay, bandwidth consumption cost, and remaining wavelength resources of each link are obtained, and the optical layer protection cost of each link is calculated using the optical layer protection cost function. This embodiment assumes that all possible optical paths in the network form a candidate set P, and each path p∈P consists of several links i. The specific expression of the optical layer protection cost function is as follows:

[0107]

[0108] Among them, for the optical layer 1+1 protection, the reserved wavelength resources must meet the service requirements. Let the wavelength resources required for the service be , and this embodiment introduces a wavelength protection penalty term function to prevent insufficient resource allocation. The specific form of the wavelength protection penalty term function is:

[0109]

[0110] In the formula, is the optical layer protection cost; is the delay weight; is the bandwidth cost weight; is the wavelength protection cost weight; for each link i in path p, is the transmission delay of link i; is the bandwidth consumption cost of link i; is the remaining wavelength resources on link i; is the wavelength resources required for the service; is the wavelength protection penalty term function; is a very small positive number to prevent division by zero.

[0111] Meanwhile, in this embodiment, according to the link bandwidth adjustment cost and additional delay, the optical layer protection cost of each link is calculated using the optical layer protection cost formula. The optical layer protection cost reflects the cost required to adjust the link bandwidth to meet service requirements under the optical layer protection mechanism. The optical layer protection cost includes costs such as additional delay and resource occupancy caused by the adjustment. Then, with the goal of minimizing the optical and electrical layer switching delay, aiming to reduce the service interruption time during the optical and electrical layer switching process and ensure minimizing the impact on existing services as much as possible during the switching process. In this embodiment, the calculated optical layer protection cost and electrical layer protection cost are integrated into the optical and electrical collaborative optimization model to construct the objective function of the optical and electrical collaborative optimization model, and find the protection strategy that minimizes the optical and electrical layer switching delay under the premise of meeting service requirements. The calculation formula of the objective function of the optical and electrical collaborative optimization model is:

[0112]

[0113] In the formula, P is the candidate set composed of all possible optical paths; Q is the set of protection links; is the weight for adjusting the overall cost of optical layer protection and electrical layer OSU protection, .

[0114] The constraint conditions of the optical and electrical collaborative optimization model in this embodiment ensure that the resource allocation of each link i meets the requirements, that is , and wavelength continuity needs to be satisfied on the path, that is, there exists a certain wavelength applicable to the entire path, that is , in this embodiment, the optoelectronic collaborative optimization based on ASON (Automatically Switched Optical Network) combines the OSU-P protection at the electrical layer with the 1+1 protection at the optical layer through dynamic routing and intelligent resource scheduling, realizes the flexible scheduling of multiple service types and resource optimization, uses the OSU-P protection mechanism of the electrical layer ASON to preferentially protect high-priority services, realizes fast switching, bandwidth lossless adjustment and precise protection of low-bitrate services. At the same time, when the electrical layer resources are insufficient or the protection fails, it switches to the protection mechanism of the optical layer ASON (such as the optical layer 1+1 protection) to provide redundant backup to ensure that the service is not interrupted. Finally, an optoelectronic switching strategy is implemented. When the electrical layer ASON cannot meet the service protection requirements, the optical layer ASON protection is triggered to ensure the smooth transition of the protection mechanism and the uninterruption of the service. In this embodiment, the goal of optoelectronic collaborative optimization is to significantly improve network reliability through a dual-layer protection mechanism, preferentially use electrical layer protection to ensure the transmission reliability of multiple services, and at the same time realize the dynamic allocation of optoelectronic layer resources in resource scheduling, reduce resource waste, and improve the overall network bandwidth utilization rate. By optimizing the switching path and resource allocation, the delay and the impact on existing services during the optoelectronic layer switching process are minimized, so as to realize an efficient, reliable and flexible network protection scheme. Through optoelectronic collaborative optimization, dynamic switching between different protection mechanisms is realized. The system solves the above joint optimization problem according to the current network state, service requirements and resource conditions, and selects the optimal optical path p* and the corresponding electrical layer protection adjustment scheme q* to simultaneously meet the requirements of low latency, low cost and sufficient wavelength resources.

[0115] For the objective function of the optoelectronic collaborative optimization model, the whole problem can be regarded as a mixed-integer nonlinear programming (MINLP) problem or a combinatorial optimization problem. In this embodiment, the particle swarm algorithm is used to solve it. When a link failure occurs, the final protection method of the service is determined. Through optoelectronic collaboration, the system can quickly switch to optical layer resources when the electrical layer resources are insufficient. This strategy can provide finer-grained service protection, adapt to more diverse service requirements, improve network flexibility, and achieve a more efficient dual-layer service protection guarantee.

[0116] An embodiment of the present invention provides a collaborative protection method for a power communication network based on OSU and ASON. The method includes dynamically configuring bandwidth resource granularity for different services according to the priorities and bandwidth requirements of various services in the power communication network, and establishing an electrical-layer optical service unit protection mechanism based on optical service units; identifying abnormal services during a fault according to the real-time monitored electrical-layer network status, and performing lossless bandwidth adjustment on the abnormal services through the electrical-layer optical service unit protection mechanism to obtain service bandwidth resource adjustment information; configuring primary and backup optical paths for various services based on the power communication network topology and service bandwidth resource adjustment information, and determining whether to trigger an optical-layer protection switching mechanism based on the real-time status of the primary and backup optical paths and the electrical-layer automatic switched optical network protection status; in response to the optical-layer protection switching mechanism trigger signal, taking minimizing the optoelectronic layer switching delay as the optimization goal, constructing an optoelectronic collaborative optimization model according to the current network status and service real-time bandwidth requirements; solving the optoelectronic collaborative optimization model to obtain an optoelectronic collaborative optimization protection strategy, and performing collaborative scheduling control on optoelectronic collaborative protection devices in the power communication network according to the optoelectronic collaborative optimization protection strategy. Compared with the prior art, this method dynamically integrates the protection resources of the electrical layer and the optical layer according to service priorities and bandwidth requirements, realizes fast recovery under network faults and an optoelectronic collaborative optimization protection mechanism, meets the requirements of the power communication network for high reliability, flexibility and efficiency, and ensures the continuity and stability of the power communication network.

[0117] It should be noted that the magnitudes of the sequence numbers of the above processes do not mean the order of execution. The order of execution of each process should be determined according to its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0118] In one embodiment, as Figure 3 shown, an embodiment of the present invention provides a collaborative protection system for a power communication network based on OSU and ASON. The system includes:

[0119] A protection establishment module 101, configured to dynamically configure bandwidth resource granularity for different services according to the priorities and bandwidth requirements of various services in the power communication network, and establish an electrical-layer optical service unit protection mechanism based on optical service units;

[0120] A bandwidth adjustment module 102, configured to identify abnormal services during a fault according to the real-time monitored electrical-layer network status, and perform lossless bandwidth adjustment on the abnormal services through the electrical-layer optical service unit protection mechanism to obtain service bandwidth resource adjustment information;

[0121] An optical-layer switching module 103, configured to configure primary and backup optical paths for various services based on the power communication network topology and service bandwidth resource adjustment information, and determine whether to trigger an optical-layer protection switching mechanism based on the real-time status of the primary and backup optical paths and the electrical-layer automatic switched optical network protection status;

[0122] A model construction module 104, configured to respond to an optical layer protection switching mechanism trigger signal, take minimizing the optical and electrical layer switching delay as an optimization objective, and construct an optical and electrical collaborative optimization model according to the current network state and the real-time bandwidth requirement of services.

[0123] A collaborative protection module 105, configured to solve the optical and electrical collaborative optimization model, obtain an optical and electrical collaborative optimization protection strategy, and perform collaborative scheduling control on the optical and electrical collaborative protection devices in the power communication network according to the optical and electrical collaborative optimization protection strategy.

[0124] For the specific limitations of a power communication network collaborative protection system based on OSU and ASON, reference can be made to the above limitations on a power communication network collaborative protection method based on OSU and ASON, which will not be elaborated here. Those of ordinary skill in the art can realize that, in combination with the various modules and steps described in the embodiments disclosed in this application, they can be implemented by hardware, software, or a combination of both. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0125] An embodiment of the present invention provides a power communication network collaborative protection system based on OSU and ASON. The protection establishment module of the system dynamically configures bandwidth resource granularities for different services according to the priorities and bandwidth requirements of various services in the power communication network, and establishes an electrical layer optical service unit protection mechanism based on optical service units; the bandwidth adjustment module identifies abnormal services when a fault occurs according to the real-time monitored electrical layer network state, and performs lossless bandwidth adjustment on the abnormal services through the electrical layer optical service unit protection mechanism to obtain service bandwidth resource adjustment information; the optical layer switching module configures primary and standby optical paths for various services based on the power communication network topology and the service bandwidth resource adjustment information, and determines whether to trigger the optical layer protection switching mechanism based on the real-time states of the primary and standby optical paths and the electrical layer automatic switched optical network protection state; the model construction module responds to the optical layer protection switching mechanism trigger signal, takes minimizing the optical and electrical layer switching delay as an optimization objective, and constructs an optical and electrical collaborative optimization model according to the current network state and the real-time bandwidth requirement of services; the collaborative protection module solves the optical and electrical collaborative optimization model, obtains an optical and electrical collaborative optimization protection strategy, and performs collaborative scheduling control on the optical and electrical collaborative protection devices in the power communication network according to the optical and electrical collaborative optimization protection strategy. Compared with the prior art, this system dynamically integrates the protection resources of the electrical layer and the optical layer according to the service priorities and bandwidth requirements, realizes fast recovery and an optical and electrical collaborative optimization protection mechanism under network faults, meets the requirements of the power communication network for high reliability, flexibility, and efficiency, and ensures the continuity and stability of the power communication network.

[0126] The above-described embodiments merely represent several preferred embodiments of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the protection scope of the claims described.

Claims

1. A collaborative protection method for power communication network based on OSU and ASON, characterized in that: The following steps are involved: According to the priority and bandwidth requirements of various services in the power communication network, the bandwidth resource granularity is dynamically configured for different services, and an electrical layer optical service unit protection mechanism based on optical service units is established; Identify abnormal services when a fault occurs according to the electrical layer network status monitored in real time, and perform lossless bandwidth adjustment on the abnormal services through the electrical layer optical service unit protection mechanism to obtain service bandwidth resource adjustment information; Based on the power communication network topology and service bandwidth resource adjustment information, configure the primary and backup optical paths for various services, and determine whether to trigger the optical layer protection switching mechanism based on the real-time status of the primary and backup optical paths and the electrical layer automatic switching optical network protection status; In response to the trigger signal of the optical layer protection switching mechanism, the optoelectronic layer switching delay is minimized as the optimization goal, and an optoelectronic collaborative optimization model is constructed according to the current network status and the real-time bandwidth requirements of the service; The optoelectronic collaborative optimization model is solved to obtain an optoelectronic collaborative optimization protection strategy, and the optoelectronic collaborative protection equipment in the power communication network is collaboratively dispatched and controlled according to the optoelectronic collaborative optimization protection strategy.

2. The method for collaborative protection of a power communication network based on OSU and ASON as claimed in claim 1, characterized in that: The steps of dynamically configuring bandwidth resource granularity for different services according to the priority and bandwidth requirements of various services in the electric power communication network and establishing an electrical layer optical service unit protection mechanism based on optical service units include: Prioritize each type of power communication service and determine the priority coefficient corresponding to each type of power communication service; Real-time monitoring of bandwidth demand information of various types of power communication services, and calculation of actual allocated bandwidth based on the bandwidth demand information of various types of power communication services and the priority coefficient; Pre-establishing optical service unit protection connections for various types of power communication services in the electrical layer automatic switching optical network; the optical service unit protection connections include main optical service unit connections and protection optical service unit connections; According to the actual allocated bandwidth, bandwidth resources are configured for the optical service unit protection connection to obtain a primary connection bandwidth and a protection connection bandwidth; Based on the main connection bandwidth and the protection connection bandwidth, an electrical layer optical service unit protection mechanism based on optical service units is established in the electrical layer automatic switching optical network.

3. The method for collaborative protection of a power communication network based on OSU and ASON as claimed in claim 1, characterized in that: The step of identifying abnormal services when a fault occurs according to the electrical layer network status monitored in real time includes: Monitor the electrical layer network status in real time, and detect whether the electrical layer network has a fault according to the electrical layer network status; wherein the electrical layer network status includes the link status, node device status, service transmission status and fault detection signal in the electrical layer network; When a fault is detected in the electrical layer network, the fault location is determined based on the fault detection signal, and abnormal services are identified from the power communication services associated with the fault location based on the link status, node device status and service transmission status at the fault location.

4. The method for collaborative protection of a power communication network based on OSU and ASON as claimed in claim 1, characterized in that: The step of performing lossless bandwidth adjustment on the abnormal service through the electrical layer optical service unit protection mechanism to obtain service bandwidth resource adjustment information comprises: Identify the links that need to be protected in the electrical layer network according to the transmission path of the abnormal service and the location of the fault, form a set of protection links, and determine the bandwidth resources required for each abnormal service according to the current state and service priority of the abnormal service; Calculate the additional delay of each link caused by the bandwidth adjustment of the electrical-layer optical service unit protection mechanism according to the adjustment speed of the electrical-layer optical service unit protection mechanism and the physical characteristics of each link in the protection link set; According to the protection failure rate, blocking rate and resource utilization rate of each link in the protection link set, the link bandwidth adjustment cost is calculated; Lossless bandwidth adjustment is performed on each link in the protection link set according to the bandwidth resources required by the abnormal service, the link bandwidth adjustment cost and the additional delay to obtain service bandwidth resource adjustment information.

5. The method for collaborative protection of a power communication network based on OSU and ASON as claimed in claim 1, characterized in that: The step of configuring the primary and backup optical paths for various services based on the power communication network topology and the service bandwidth resource adjustment information includes: Analyze the optical layer topology of the power communication network, obtain the power communication network topology information, and construct the power communication network topology model based on the power communication network topology information; Using the shortest path algorithm, a main optical path from a source node to a sink node that satisfies the service bandwidth resource adjustment information and the shortest delay requirements is found in the power communication network topology model; In the power communication network topology model, a path with no overlapping links or nodes with the main optical path is found as the backup optical path.

6. The method for coordinated protection of a power communication network based on OSU and ASON as claimed in claim 5, characterized in that: In the process of configuring primary and backup optical paths for various services, the primary and backup optical paths are configured with the same wavelength resources, and wavelength resources that meet wavelength continuity constraints are reserved for the primary and backup optical paths of each power communication service in the power communication network.

7. The method for coordinated protection of a power communication network based on OSU and ASON as claimed in claim 1, characterized in that: The step of determining whether to trigger the optical layer protection switching mechanism based on the real-time status of the primary and backup optical paths and the electrical layer automatic switching optical network protection status comprises: Real-time monitoring of the primary and backup optical paths and the electrical layer automatic switching optical network to obtain the real-time status of the primary and backup optical paths and the protection status of the electrical layer automatic switching optical network; Detecting the electrical layer allocation bandwidth of the primary and backup optical paths according to the real-time status of the primary and backup optical paths, and determining that the electrical layer protection fails when the electrical layer allocation bandwidth of the primary and backup optical paths does not meet the preset service protection requirement bandwidth; Detecting the remaining bandwidth of the electrical layer according to the protection state of the electrical layer automatic switching optical network, and determining that the remaining bandwidth resources of the electrical layer are insufficient when the remaining bandwidth of the electrical layer does not meet the preset service protection requirement bandwidth; When the electrical layer protection fails or the electrical layer remaining bandwidth resources are insufficient, an optical layer protection switching mechanism is triggered.

8. The method for coordinated protection of a power communication network based on OSU and ASON as claimed in claim 4, characterized in that: The step of responding to the trigger signal of the optical layer protection switching mechanism, taking minimizing the optical layer switching delay as the optimization goal, and constructing the optical-electrical collaborative optimization model according to the current network status and the real-time bandwidth demand of the service includes: After receiving the optical layer protection switching mechanism trigger signal, the current network state of the electric power communication network is obtained, and the link transmission delay, link bandwidth consumption cost and link remaining wavelength resources are obtained according to the current network state; The optical layer protection cost of each link is calculated based on the link transmission delay, link bandwidth consumption cost and link remaining wavelength resources; Calculating the electrical layer protection cost of each link according to the link bandwidth adjustment cost and the additional delay; Taking minimizing the switching delay of the photovoltaic layer as the optimization goal, a photovoltaic collaborative optimization model is constructed according to the optical layer protection cost and the electrical layer protection cost.

9. The method for coordinated protection of a power communication network based on OSU and ASON as claimed in claim 8, characterized in that: The photoelectric collaborative optimization protection strategy is solved by a particle swarm algorithm.

10. A power communication network collaborative protection system based on OSU and ASON, characterized in that: The system comprises: The protection establishment module is used to dynamically configure bandwidth resource granularity for different services according to the priority and bandwidth requirements of various services in the power communication network, and establish an electrical layer optical service unit protection mechanism based on the optical service unit; The bandwidth adjustment module is used to identify abnormal services when a fault occurs according to the electrical layer network status monitored in real time, and to perform lossless bandwidth adjustment on the abnormal services through the electrical layer optical service unit protection mechanism to obtain service bandwidth resource adjustment information; An optical layer switching module is used to configure primary and backup optical paths for various services based on the power communication network topology and service bandwidth resource adjustment information, and determine whether to trigger the optical layer protection switching mechanism based on the real-time status of the primary and backup optical paths and the electrical layer automatic switching optical network protection status; A model building module is used to respond to the trigger signal of the optical layer protection switching mechanism, take minimizing the optical layer switching delay as the optimization goal, and build an optical-electrical collaborative optimization model according to the current network status and the real-time bandwidth requirements of the business; The collaborative protection module is used to solve the optoelectronic collaborative optimization model, obtain the optoelectronic collaborative optimization protection strategy, and perform collaborative dispatching and control of the optoelectronic collaborative protection equipment in the power communication network according to the optoelectronic collaborative optimization protection strategy.

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