Optical network device, OTN / DWDM wavelength division transmission device and optical network system

Abstract

The application relates to the optical transmission technical field and discloses an optical network device, an OTN / DWDM wave division transmission device and an optical network system. The optical network device comprises a plurality of first optical modules, a first electric protection module, a second optical module, a third optical module, a first light splitting module, a first optical switch module, a second light splitting module, a second optical switch module, a fourth optical module, a fifth optical module, a second electric protection module, a plurality of sixth optical modules and a first control module. The first control module performs real-time detection on an electrical signal recovered by a receiving end. When a preset condition is not met, the first control module is sequentially switched to a backup optical fiber and a backup sending channel until the second electric protection module receives a service signal meeting the preset condition. The technical scheme realizes the combination of electric layer service convergence and copying and optical layer double sending channels and double optical fiber redundant protection, can quickly recover service transmission when a fault occurs, and improves service continuity and system reliability.

Description

Technical Field

[0001] This invention relates to the field of optical transmission technology, and more particularly to an optical network device, an OTN / DWDM wavelength division transmission device, and an optical network system. Background Technology

[0002] Existing optical network equipment typically uses a single optical fiber as the data transmission channel. When the fiber breaks, is bent excessively, a connector becomes loose, optical devices malfunction, or link attenuation is abnormal, the quality of the transmitted optical signal will significantly degrade, even leading to service interruption. Although some systems are equipped with backup optical fibers, most can only provide switching protection for a single path. When both the primary and backup optical fibers fail, or when devices such as optoelectronic conversion modules or electro-optical conversion modules malfunction, the system cannot switch to other available transmission links in a timely manner, resulting in low communication reliability.

[0003] Furthermore, existing fault handover technologies typically rely on optical layer detection results, switching solely based on optical power degradation or link interruption, lacking coordinated detection of both electrical and optical signal states. When an electrical signal anomaly occurs at the receiving end, the system may continue to maintain the current optical transmission link, or it may be unable to accurately determine the fault location, easily leading to erroneous handovers, repeated handovers, or handover delays, affecting service continuity and system stability. Summary of the Invention

[0004] This invention provides an optical network device, an OTN / DWDM wavelength division transmission device, and an optical network system to solve the aforementioned technical problems.

[0005] The first aspect of this invention provides an optical network device, comprising: a plurality of first optical modules, a first electrical protection module, a second optical module, a third optical module, a first optical splitter module, a first optical switch module, a second optical splitter module, a second optical switch module, a fourth optical module, a fifth optical module, a second electrical protection module, a plurality of sixth optical modules, and a first control module; Each first optical module receives a first optical signal and converts it into a first electrical signal; the first electrical protection module merges multiple first electrical signals to obtain a second electrical signal, and copies the second electrical signal to obtain a third electrical signal; the second optical module converts the second electrical signal back into a second optical signal; the first beam splitter divides the second optical signal into a third optical signal and a fourth optical signal, which are transmitted through the first optical fiber and the second optical fiber, respectively; the fourth optical module converts either the third or fourth optical signal into a fourth electrical signal; the third optical module converts the third electrical signal into a fifth optical signal; the second beam splitter divides the fifth optical signal into a sixth and a seventh optical signal, which are transmitted through the third optical fiber and the fourth optical fiber, respectively; the fifth optical module converts either the sixth or seventh optical signal back into a fifth electrical signal; the second electrical protection module outputs the received electrical signal to the corresponding sixth optical module. The first control module is connected to the first optical switch module, the second optical switch module, and the second electrical protection module, and is configured to: control the first optical switch module to receive a third optical signal through the first optical fiber and output it to the fourth optical module; detect the fourth electrical signal, and if the fourth electrical signal does not meet the first preset condition, control the first optical switch module to switch to receiving the fourth optical signal transmitted through the second optical fiber and output it to the fourth optical module; re-detect the fourth electrical signal, and if the fourth electrical signal still does not meet the first preset condition, control the second optical switch module to receive a sixth optical signal through the third optical fiber and output it to the fifth optical module; detect the fifth electrical signal, and if the fifth electrical signal does not meet the first preset condition, control the second optical switch module to switch to receiving a seventh optical signal transmitted through the fourth optical fiber and output it to the fifth optical module; until the second electrical protection module receives a fourth or fifth electrical signal that meets the preset condition and outputs it to the corresponding sixth optical module; The first control module is further configured to: when the fourth electrical signal or the fifth electrical signal does not meet the first preset condition, acquire the electrical signal quality parameters of the corresponding electrical signal, determine the electrical signal degradation type based on the deviation between each electrical signal quality parameter and the target parameter, and compensate the corresponding electrical signal according to the degradation type; if the compensated electrical signal still does not meet the first preset condition and reaches the preset number of compensations or the preset compensation range, then control the corresponding optical switch module to perform fiber optic switching.

[0006] Optionally, the optical network equipment may also include: a second control module, a third optical splitter module, a third optical switch module, a fourth optical splitter module, and a fourth optical switch module; Each sixth optical module receives the eleventh optical signal and converts it into an eleventh electrical signal; the second electrical protection module merges multiple eleventh electrical signals to obtain a twelfth electrical signal, and copies the twelfth electrical signal to obtain a thirteenth electrical signal; the fourth optical module converts the twelfth electrical signal into a twelfth optical signal; the third optical splitter divides the twelfth optical signal into a thirteenth and fourteenth optical signal, which are transmitted through the fifth and sixth optical fibers respectively; the fifth optical module converts either the thirteenth or fourteenth electrical signal into a fifteenth optical signal; the fourth optical splitter divides the fifteenth optical signal into a sixteenth and seventeenth optical signal, which are transmitted through the seventh and eighth optical fibers respectively; the second optical module converts either the thirteenth or fourteenth optical signal output by the third optical switch module into a fourteenth electrical signal; the third optical module converts either the sixteenth or seventeenth optical signal output by the fourth optical switch module into a fifteenth electrical signal; the first electrical protection module outputs the received fourteenth or fifteenth electrical signal to the corresponding first optical module; The second control module is configured to: control the first protection module to select either the second or third optical module based on one of the fourteenth or fifteenth electrical signals; control the third optical switch module to select either the fifth or sixth optical fiber based on the fourteenth electrical signal; and control the fourth optical switch module to select either the seventh or eighth optical fiber based on the fifteenth electrical signal. The third optical switch module is controlled to transmit the thirteenth optical signal through the fifth optical fiber; the fourteenth electrical signal is detected; if the fourteenth electrical signal does not meet a first preset condition, the third optical switch module is controlled to switch to the sixth optical fiber to transmit the fourteenth optical signal; if the fourteenth electrical signal still does not meet the first preset condition, the fourth optical switch module is controlled to transmit the sixteenth optical signal through the seventh optical fiber; the fifteenth electrical signal is detected; if the fifteenth electrical signal does not meet the first preset condition, the fourth optical switch module is controlled to switch to the eighth optical fiber to transmit the seventeenth optical signal; until the first electrical protection module receives either the fourteenth or fifteenth electrical signal that meets the preset condition and outputs it to the corresponding first optical module.

[0007] Optionally, the first control module is also configured as follows: When the third optical signal transmitted through the first optical fiber does not meet the second preset condition, the first optical switch module is controlled to switch to the second optical fiber to transmit the fourth optical signal. Alternatively, if the first control module detects that the sixth optical signal transmitted through the third optical fiber does not meet the second preset condition, it controls the second optical switch module to switch to the transmission of the seventh optical signal through the fourth optical fiber.

[0008] Optionally, the second control module is also configured to: when the thirteenth optical signal transmitted through the fifth optical fiber does not meet the second preset condition, control the third optical switch module to switch to the transmission of the fourteenth optical signal through the sixth optical fiber; Alternatively, if the second control module detects that the sixteenth optical signal transmitted through the seventh optical fiber does not meet the second preset condition, it controls the second optical switch module to switch to transmitting the seventeenth optical signal through the eighth optical fiber.

[0009] Optionally, the second preset condition includes at least one of the optical power, bit error rate, signal-to-noise ratio, optical signal-to-noise ratio, receiver sensitivity, and link alarm information of the optical signal meeting a preset threshold.

[0010] Optionally, the first preset condition includes at least one of the following satisfying a preset threshold: bit error rate, signal strength, signal-to-noise ratio, packet loss rate, and clock recovery status.

[0011] Optionally, the first electrical protection module includes: The first electrical signal combining unit is connected to multiple first optical modules and a second optical module respectively, and is configured to combine multiple first electrical signals to obtain a second electrical signal, and output the second electrical signal to the second optical module; The first electrical signal copying unit is connected to the first electrical signal merging unit and the third optical module respectively, and is configured to copy the second electrical signal to obtain the third electrical signal, and output the third electrical signal to the third optical module; The first electrical signal decomposition unit is connected to the second optical module, the third optical module and multiple first optical modules respectively. It is configured to receive the electrical signals output by the second optical module and the third optical module, restore them to the corresponding multiple service electrical signals respectively, and output the multiple service electrical signals to the corresponding first optical modules.

[0012] Optionally, the second electrical protection module includes: The second electrical signal merging unit is connected to multiple sixth optical modules and a fourth optical module respectively. It is configured to merge multiple eleventh electrical signals to obtain a twelfth electrical signal and output the twelfth electrical signal to the fourth optical module. The second electrical signal copying unit, which is connected to the second electrical signal merging unit and the fifth optical module respectively, is configured to copy the twelfth electrical signal to obtain the thirteenth electrical signal and output the thirteenth electrical signal to the fifth optical module; The second electrical signal decomposition unit is connected to the fourth optical module, the fifth optical module and multiple sixth optical modules respectively. It is configured to receive the electrical signals output by the fourth optical module and the fifth optical module, restore them to the corresponding multiple service electrical signals, and output the multiple service electrical signals to the corresponding sixth optical modules.

[0013] A second aspect of the present invention provides an OTN / DWDM wavelength division transmission device, including the optical network device provided in the first aspect.

[0014] A third aspect of the present invention provides an optical network system, including the optical network device provided in the first aspect and a host computer, wherein the host computer is connected to the first control module.

[0015] The technical effects of this invention are as follows: This technical solution aggregates and replicates multiple service signals at the electrical layer and sets up a dual-transmission channel and dual-fiber redundant transmission mechanism at the optical layer. Simultaneously, combined with the first control module, it performs step-by-step detection and automatic switching of fiber optic links and transmission channels. This enables the system to automatically select service signals that meet preset conditions for continued output when a single fiber, single optical module, or single path fails, completing service recovery without manual intervention. This effectively shortens fault switching time and improves the continuity and reliability of service transmission. Furthermore, service aggregation transmission improves fiber optic resource utilization, reduces the number of optical modules and transmission links required, and lowers system construction costs and maintenance complexity. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is one of the structural schematic diagrams of an optical network device provided in Embodiment 1 of the present invention; Figure 2 This is a second schematic diagram of the structure of an optical network device provided in Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the structure of the first electrical protection module in an optical network device according to Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the structure of the second electrical protection module in an optical network device according to Embodiment 1 of the present invention; In the diagram: 100, First control module; 101, First optical module; 102, First electrical protection module; 103, Second optical module; 104, Third optical module; 105, First beam splitter module; 106, Second beam splitter module; 107, First optical switch module; 108, Second optical switch module; 109, Fourth optical module; 110, Fifth optical module; 111, Second electrical protection module; 112, Sixth optical module; 121, Third beam splitter module; 122, Third optical switch module; 123, Fourth beam splitter module; 124. Fourth optical switch module; 200. Second control module; 201. First optical fiber; 202. Second optical fiber; 203. Third optical fiber; 204. Fourth optical fiber; 205. Fifth optical fiber; 206. Sixth optical fiber; 207. Seventh optical fiber; 208. Eighth optical fiber; 301. First electrical signal merging unit; 302. First electrical signal copying unit; 303. First electrical signal decomposition unit; 401. Second electrical signal merging unit; 402. Second electrical signal copying unit; 403. Second electrical signal decomposition unit. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] It should be understood that the invention can be embodied in various forms and should not be construed as being limited to the embodiments set forth herein. Rather, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, for clarity, the dimensions and relative dimensions of layers and regions may be exaggerated. The same reference numerals denote the same elements throughout.

[0020] It should be understood that when an element or layer is referred to as "on," "adjacent to," "connected to," or "coupled to" other elements or layers, it may be directly on, adjacent to, connected to, or coupled to other elements or layers, or there may be intervening elements or layers. Conversely, when an element is referred to as "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc., may be used to describe various elements, components, areas, layers, and / or portions, these elements, components, areas, layers, and / or portions should not be limited by these terms. These terms are only used to distinguish one element, component, area, layer, or portion from another element, component, area, layer, or portion. Therefore, without departing from the teachings of this invention, the first element, component, area, layer, or portion discussed below may be referred to as the second element, component, area, layer, or portion.

[0021] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. When used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising” and / or “including,” when used in this specification, identify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups. When used herein, the term “and / or” includes any and all combinations of the associated listed items.

[0022] To fully understand this invention, detailed structures and steps will be presented in the following description to illustrate the technical solution proposed by this invention. Preferred embodiments of the invention are described in detail below; however, in addition to these detailed descriptions, the invention may have other embodiments.

[0023] Example 1 This embodiment provides an optical network device, such as... Figure 1As shown, it includes: multiple first optical modules 101, a first electrical protection module 102, a second optical module 103, a third optical module 104, a first beam splitter 105, a first optical switch module 107, a second beam splitter 106, a second optical switch module 108, a fourth optical module 109, a fifth optical module 110, a second electrical protection module 111, multiple sixth optical modules 112, and a first control module 100; The first electrical protection module 102 is connected to multiple first optical modules 101, second optical modules 103, and third optical modules 104 respectively. The second optical module 103 is connected to the first optical splitter module 105. The first optical splitter module 105 is connected to the first optical switch module 107 through the first optical fiber 201 and the second optical fiber 202. The first optical switch module 107 is connected to the fourth optical module 109. The third optical module 104 is connected to the second optical splitter module 106. The second optical splitter module 106 is connected to the second optical switch module 108 through the third optical fiber 203 and the fourth optical fiber 204. The second optical switch module 108 is connected to the fifth optical module 110. The second electrical protection module 111 is connected to the fourth optical module 109, the fifth optical module 110, and multiple sixth optical modules 112 respectively. The first control module 100 is connected to the first optical switch module 107, the second optical switch module 108, and the second electrical protection module 111 respectively. Each first optical module 101 receives a first optical signal and converts it into a first electrical signal; the first electrical protection module 102 merges multiple first electrical signals to obtain a second electrical signal, and copies the second electrical signal to obtain a third electrical signal; the second optical module 103 converts the second electrical signal into a second optical signal; the first optical splitter 105 splits the second optical signal into a third optical signal and a fourth optical signal, and transmits them through the first optical fiber 201 and the second optical fiber 202 respectively; the third optical module 104 converts the third electrical signal into a fifth optical signal; the fourth optical module 109 converts either the third or fourth optical signal into a fourth electrical signal; the second optical splitter 106 splits the fifth optical signal into a sixth optical signal and a seventh optical signal, and transmits them through the third optical fiber 203 and the fourth optical fiber 204 respectively; the fifth optical module 110 converts either the sixth or seventh optical signal into a fifth electrical signal; and the second electrical protection module 111 outputs the received electrical signal to the corresponding sixth optical module 112. The first control module 100 is configured to: control the first optical switch module 107 to receive the third optical signal through the first optical fiber 201 and output it to the fourth optical module 109; detect the fourth electrical signal, and if the fourth electrical signal does not meet the first preset condition, control the first optical switch module 107 to switch to receiving the fourth optical signal transmitted through the second optical fiber 202 and output it to the fourth optical module 109; re-detect the fourth electrical signal, and if the fourth electrical signal still does not meet the first preset condition, control the second optical switch module 108 to receive the sixth optical signal through the third optical fiber 203 and output it to the fifth optical module 110; detect the fifth electrical signal, and if the fifth electrical signal does not meet the first preset condition, control the second optical switch module 108 to switch to receiving the seventh optical signal transmitted through the fourth optical fiber 204 and output it to the fifth optical module 110; until the second electrical protection module 111 receives the fourth or fifth electrical signal that meets the preset condition and outputs it to the corresponding sixth optical module 112.

[0024] This embodiment provides an optical network device with multi-level redundancy protection capabilities. The system front-end is equipped with multiple first optical modules 101, which receive optical service signals from multiple service ports and perform photoelectric conversion to form corresponding electrical signals. A first electrical protection module 102 aggregates the multiple input electrical signals to form a unified service electrical signal and replicates it into two identical electrical signals to drive two independent optical transmission links. By establishing two transmission paths for the same service data simultaneously, link redundancy is achieved without regenerating the service data, providing a basis for subsequent fault switching.

[0025] One electrical signal is remodulated into an optical signal by the second optical module 103 and then distributed by the first optical splitter 105 to the first optical fiber 201 and the second optical fiber 202. The other electrical signal is converted by the third optical module 104 and then distributed by the second optical splitter 106 to the third optical fiber 203 and the fourth optical fiber 204. The first optical switch module 107 and the second optical switch module 108 are respectively connected to the two sets of optical fibers. According to the control command, one of the optical fibers can be selected as the current working link, and the received optical signal is output to the corresponding fourth optical module 109 or fifth optical module 110 to complete the photoelectric conversion, thereby forming two independent optical transmission channels.

[0026] During system operation, the first control module 100 prioritizes the first group of transmission links as the service transmission path and acquires the quality of the electrical signal output by the fourth optical module 109 in real time. When a transmission anomaly is detected in the link corresponding to the electrical signal, it does not immediately switch to another transmission channel. Instead, it first switches the first optical switch module 107 to the backup optical fiber in the first group, ensuring that the service is still transmitted within the same transmission link. If the electrical signal returns to normal after the switch, the backup optical fiber continues to be used to transmit service data without needing to start the second transmission link.

[0027] If neither of the two optical fibers in the first group can guarantee normal transmission, the first control module 100 further activates the second group of transmission links and controls the second optical switch module 108 to select the third optical fiber 203 to establish a new service transmission path. Simultaneously, it continuously judges the link status based on the electrical signal output by the fifth optical module 110. When an anomaly is detected in the link corresponding to the third optical fiber 203, it switches to the fourth optical fiber 204 to continue service transmission until an electrical signal meeting the transmission requirements is received. Finally, the second electrical protection module 111 selects the required input electrical signal and sends it to the corresponding sixth optical module 112. The sixth optical module 112 then performs electro-optical conversion and continues to output the service optical signal to the subsequent equipment.

[0028] In this embodiment, if the fourth electrical signal (or the fifth electrical signal) meets the first preset condition, it means that the corresponding optical transmission link can normally carry service data, the quality of the electrical signal recovered by the receiving end meets the transmission requirements set by the system, and subsequent service transmission can continue without further link switching.

[0029] Specifically, the first preset condition can be set according to the actual application and is used to characterize whether the current transmission link is in a normal working state. For example, the first preset condition may include one or more of the following: The bit error rate of the fourth electrical signal (or the fifth electrical signal) is less than the preset bit error rate threshold; the signal amplitude of the fourth electrical signal (or the fifth electrical signal) is greater than the preset amplitude threshold; the signal-to-noise ratio of the fourth electrical signal (or the fifth electrical signal) is greater than the preset signal-to-noise ratio threshold; the clock recovery status of the fourth electrical signal (or the fifth electrical signal) is normal; the data frame integrity rate of the fourth electrical signal (or the fifth electrical signal) is higher than the preset integrity rate threshold; the receiver does not detect link alarms such as LOS (Loss of Signal), LOF (Loss of Frame), or high bit error rate.

[0030] When the fourth electrical signal meets the first preset condition, it indicates that the first transmission link composed of the second optical module 103, the first optical splitter 105, the first optical fiber 201 (or the second optical fiber 202), the first optical switch module 107, and the fourth optical module 109 can transmit service data normally. The first control module 100 maintains the current optical fiber transmission state and does not perform link switching.

[0031] When the fourth electrical signal does not meet the first preset condition, it indicates that the currently used first transmission link has a fiber optic fault, connector malfunction, optical module malfunction, or excessive link attenuation, resulting in a decrease in the quality of the electrical signal recovered by the receiving end, which cannot meet the service transmission requirements. At this time, the first control module 100 controls the first optical switch module 107 to switch to another backup optical fiber; if the fourth electrical signal still does not meet the first preset condition after switching, the second transmission link is further activated, and the fiber switching is continued based on whether the fifth electrical signal meets the first preset condition, until an electrical signal that meets the first preset condition is obtained.

[0032] In this embodiment, multiple first optical modules 101 first convert multiple input optical signals into electrical signals. A first electrical protection module 102 then aggregates these electrical signals and replicates them to generate two identical service data streams, enabling two independent transmission links to simultaneously transmit data. Compared to traditional optical transmission methods that rely on only a single transmission link, this embodiment eliminates the need to re-establish service data or reconfigure the transmitter after a failure. It allows direct use of another transmission link to continue transmitting service data, shortening service recovery time and improving service continuity.

[0033] Furthermore, the first optical splitter module 105 distributes the second optical signal to the first optical fiber 201 and the second optical fiber 202, respectively, and the second optical splitter module 106 distributes the fifth optical signal to the third optical fiber 203 and the fourth optical fiber 204, respectively, so that each transmission link has a primary fiber and a backup fiber. The first control module 100 prioritizes the first optical fiber 201 for data transmission. When it detects that the fourth electrical signal output by the fourth optical module 109 cannot meet the transmission requirements, the switching between the first optical fiber 201 and the second optical fiber 202 can be completed simply by switching the first optical switch module 107, without switching the transmission module or re-establishing the communication link. Therefore, when the fault only occurs in the first optical fiber 201, service transmission can be quickly restored, the link switching range can be reduced, the switching efficiency can be improved, and the service jitter caused by equipment switching can be reduced.

[0034] When neither of the two optical fibers in the first transmission link can meet the transmission requirements, the first control module 100 further controls the second optical switch module 108 to activate another independent transmission link output by the third optical module 104, and prioritizes transmission through the third optical fiber 203. If the third optical fiber 203 also fails, the system switches to the fourth optical fiber 204 to continue transmitting services. Therefore, this embodiment can handle not only single optical fiber failures, but also failures of the entire first transmission link, optical module malfunctions, or transmission equipment failures, enabling the system to restore services over a wider range and improving the system's fault tolerance.

[0035] Furthermore, this embodiment does not directly switch based on optical signals, but instead uses the fourth and fifth electrical signals output by the fourth optical module 109 and the fifth optical module 110 as the basis for judging link quality. Since the electrical signals comprehensively reflect the overall transmission quality after photoelectric conversion at the transmitting end, the optical fiber link, and the receiving end, it can more accurately determine whether the service can be restored normally, avoiding false or missed switching caused by judging solely based on optical power, and improving the accuracy and reliability of link switching decisions.

[0036] At the same time, the second electrical protection module 111 outputs service data to the corresponding sixth optical module 112 according to the fourth or fifth electrical signal that meets the preset conditions, so that the downstream equipment always receives service signals with satisfactory quality without needing to sense the front-end link switching process, thereby ensuring the continuous operation of downstream services and improving the stability and reliability of the entire optical network equipment.

[0037] In summary, this embodiment sets up two independent transmission links, with a primary fiber and a backup fiber in each transmission link, to achieve rapid switching and service recovery under different fault scenarios. This reduces the probability of service interruption, shortens fault recovery time, and improves the reliability, fault tolerance, and service continuity of optical network equipment. It is especially suitable for application scenarios with high requirements for communication reliability, such as data centers, power communication, and industrial communication.

[0038] As one implementation method, such as Figure 2 As shown, the optical network device further includes: a second control module 200, a third optical splitter module 121, a third optical switch module 122, a fourth optical splitter module 123, and a fourth optical switch module 124. The third optical splitter module 121 is connected to the fourth optical module 109, the fifth optical fiber 205, and the sixth optical fiber 206, respectively. The third optical switch module 122 is connected to the fifth optical fiber 205, the sixth optical fiber 206, and the second optical module 103, respectively. The fourth optical splitter module 123 is connected to the fifth optical module 110, the seventh optical fiber 207, and the eighth optical fiber 208, respectively. The fourth optical switch module 124 is connected to the seventh optical fiber 207, the eighth optical fiber 208, and the third optical module 104, respectively. The second control module 200 is connected to the third optical switch module 122, the fourth optical switch module 124, and the first electrical protection module 102, respectively. Each sixth optical module 112 receives the eleventh optical signal and converts it into an eleventh electrical signal; the second electrical protection module 111 merges multiple eleventh electrical signals to obtain a twelfth electrical signal, and copies the twelfth electrical signal to obtain a thirteenth electrical signal; the fourth optical module 109 converts the twelfth electrical signal into a twelfth optical signal; the third optical splitter 121 splits the twelfth optical signal into a thirteenth and fourteenth optical signal; the fifth optical module 110 converts either the thirteenth or fourteenth optical signal into a fifteenth optical signal; the fourth optical splitter 123 splits the fifteenth optical signal into a sixteenth and seventeenth optical signal; the second optical module 103 converts either the thirteenth or fourteenth optical signal output by the third optical switch module 122 into a fourteenth electrical signal; the third optical module 104 converts either the sixteenth or seventeenth optical signal output by the fourth optical switch module 124 into a fifteenth electrical signal; the first electrical protection module 102 outputs the received fourteenth or fifteenth electrical signal to the corresponding first optical module 101; The second control module 200 is configured to: control the third optical switch module 122 to transmit the thirteenth optical signal through the fifth optical fiber 205; detect the fourteenth electrical signal; if the fourteenth electrical signal does not meet the first preset condition, control the third optical switch module 122 to switch to the sixth optical fiber 206 to transmit the fourteenth optical signal; when the fourteenth electrical signal still does not meet the first preset condition, control the fourth optical switch module 124 to transmit the sixteenth optical signal through the seventh optical fiber 207; detect the fifteenth electrical signal; if the fifteenth electrical signal does not meet the first preset condition, control the fourth optical switch module 124 to switch to the eighth optical fiber 208 to transmit the seventeenth optical signal; until the first electrical protection module 102 receives the fourteenth or fifteenth electrical signal that meets the preset condition and outputs it to the corresponding first optical module 101.

[0039] In this embodiment, Figure 1 Based on the optical network equipment shown, a reverse service transmission channel corresponding to the forward service transmission is further constructed, enabling the system to have bidirectional data transmission and bidirectional redundancy protection capabilities.

[0040] Specifically, the system adds a second control module 200, a third optical splitter module 121, a third optical switch module 122, a fourth optical splitter module 123, and a fourth optical switch module 124. The third optical splitter module 121 and the third optical switch module 122 form the first reverse transmission unit, and the fourth optical splitter module 123 and the fourth optical switch module 124 form the second reverse transmission unit. These two sets of transmission units correspond to two independent reverse service transmission paths, and each is equipped with a primary optical fiber and a backup optical fiber to form a connection with... Figure 1 The corresponding dual-layer redundant protection structure in the embodiment.

[0041] During reverse service transmission, multiple sixth optical modules 112 receive service optical signals from remote equipment and perform photoelectric conversion to generate corresponding electrical signals. The second electrical protection module 111 aggregates the various electrical signals to form a unified service electrical signal and replicates it into two identical electrical signals to drive the two reverse transmission links respectively. Subsequently, one of the electrical signals is remodulated into an optical signal by the fourth optical module 109 and simultaneously output to the fifth optical fiber 205 and the sixth optical fiber 206 by the third optical splitter module 121; the other electrical signal is remodulated by the fifth optical module 110 and simultaneously output to the seventh optical fiber 207 and the eighth optical fiber 208 by the fourth optical splitter module 123, providing a backup transmission path for subsequent link switching.

[0042] During normal system operation, the second control module 200 preferentially selects the fifth optical fiber 205 as the first reverse transmission link and controls the third optical switch module 122 to receive the corresponding optical signal, which is then converted into photoelectric signal by the second optical module 103. When the electrical signal output by the second optical module 103 meets the first preset condition, it indicates that the current reverse transmission link can complete the service transmission normally, and the system continues to maintain its current operating state. When it is detected that the link quality corresponding to the electrical signal has deteriorated and cannot meet the service transmission requirements, the second control module 200 first controls the third optical switch module 122 to switch to the sixth optical fiber 206, so that the service is still transmitted within the first reverse transmission link without having to activate another transmission link, thereby reducing the switching range and minimizing service interruption time.

[0043] If normal transmission cannot be restored after switching to the sixth fiber 206, it indicates an overall abnormality in the first reverse transmission link, such as a faulty transmitting optical module, a faulty splitter module, or a fault in both fibers. In this case, the second control module 200 further activates the second reverse transmission link, controlling the fourth optical switch module 124 to prioritize receiving the service optical signal transmitted via the seventh fiber 207, with the third optical module 104 performing photoelectric conversion. When the electrical signal output by the third optical module 104 still does not meet the first preset condition, it further switches to the eighth fiber 208 to continue service transmission until the first electrical protection module 102 receives an electrical signal that meets the service transmission requirements and outputs it to the corresponding first optical module 101, which then re-converts it into an optical signal and sends it to the corresponding service port.

[0044] In this embodiment, the second control module 200 can also determine the current link status based on the quality of the electrical signal recovered from the receiving end. The first preset condition may include one or more of the following: bit error rate, signal amplitude, signal-to-noise ratio, receiver sensitivity, frame synchronization status, and link alarm information. When the recovered electrical signal meets the first preset condition, it indicates that the current reverse transmission link can reliably transmit service data, and no further switching is required; when the recovered electrical signal does not meet the first preset condition, it indicates that there is a fault in the current link that affects service transmission, and it is necessary to switch the backup optical fiber or backup transmission link in a preset order.

[0045] and Figure 1 Compared to the forward protection mechanism in the previous embodiment, this embodiment further implements multi-level redundancy protection in the reverse transmission direction. By independently detecting, switching, and recovering the forward and reverse links, it not only avoids the impact of a single-direction link failure on data transmission in the other direction, but also enables rapid communication recovery under different fault scenarios such as fiber optic failure, optical module failure, and overall failure of the transmitting link, achieving continuous bidirectional service transmission between the transmitting and receiving ends. Compared to optical network devices that only support unidirectional or single-level protection, this embodiment further improves the system's reliability, fault tolerance, and network availability, reducing the risk of service interruption. It is particularly suitable for application scenarios with high requirements for communication continuity, such as data center interconnection, backbone optical networks, and power communication.

[0046] In one implementation, when the first control module 100 detects that the third optical signal transmitted by the first optical fiber 201 does not meet the second preset condition, it controls the first optical switch module 107 to switch to the second optical fiber 202 to transmit the fourth optical signal. Alternatively, when the first control module 100 detects that the sixth optical signal transmitted by the third optical fiber 203 does not meet the second preset condition, it controls the second optical switch module 108 to switch to the fourth optical fiber 204 to transmit the seventh optical signal.

[0047] In addition to determining whether the link is normal based on the electrical signal status recovered from the receiving end, the first control module 100 can also directly monitor the transmitted optical signal in the optical fiber in real time. When a degradation in the quality of the optical signal in the current working optical fiber is detected, the first control module 100 can perform fiber switching in advance without waiting for an abnormal electrical signal at the receiving end, thereby further shortening the fault recovery time.

[0048] Specifically, during system operation, the first optical fiber 201 serves as the primary optical fiber for the first transmitting link, handling service data transmission. The first control module 100 acquires the optical signal transmission status in the first optical fiber 201 in real time and determines whether the fiber is in normal working condition based on a second preset condition. This second preset condition may include one or more of the following: optical power, optical signal-to-noise ratio, bit error rate, optical module alarm status, link attenuation, and signal loss status. When the detection result indicates that the optical signal in the first optical fiber 201 has experienced excessive attenuation, increased bit error rate, or link abnormality, the first control module 100 immediately controls the first optical switch module 107 to switch to the second optical fiber 202, allowing service data to continue transmission via the backup fiber without waiting for the receiving end to detect a decline in electrical signal quality before performing the switch.

[0049] Similarly, in the second transmission link, the third optical fiber 203 serves as the default service transmission channel. When the first control module 100 detects that the optical signal in the third optical fiber 203 no longer meets the second preset condition, it can immediately control the second optical switch module 108 to switch to the fourth optical fiber 204, so that the second transmission link can continue to maintain normal data transmission capability.

[0050] In this embodiment, the second preset condition is mainly used to reflect the optical layer transmission status, while the first preset condition is mainly used to reflect the electrical signal quality after service recovery. The second preset condition is a link front-end detection indicator, which can be used to detect early faults such as fiber attenuation, loose connectors, and abnormal optical module transmit power. The first preset condition is a link end detection indicator, which can be used to determine whether the service quality after the entire optical transmission link completes photoelectric conversion meets the transmission requirements. The two detection methods work together to form a dual detection mechanism of optical path detection and circuit detection.

[0051] Compared to methods that rely solely on receiver electrical signals for fault diagnosis, this embodiment can activate backup optical fibers as soon as optical signal quality begins to decline. This reduces bit errors and packet loss caused by link degradation, lowering the risk of service interruption. Simultaneously, it uses the recovered electrical signals from the receiver to confirm the handover result, avoiding unnecessary handovers due to instantaneous optical power fluctuations, environmental interference, and other factors, thus improving the accuracy and stability of link handover. By combining optical layer detection with electrical layer detection, this embodiment further improves the fault response speed, link reliability, and service continuity of optical network equipment, making it particularly suitable for high-speed optical communication scenarios with high real-time and stability requirements.

[0052] In one implementation, when the second control module 200 detects that the thirteenth optical signal transmitted through the fifth optical fiber 205 does not meet the second preset condition, it controls the third optical switch module 122 to switch to the sixth optical fiber 206 to transmit the fourteenth optical signal. Alternatively, when the first control module 100 detects that the sixteenth optical signal transmitted through the seventh optical fiber 207 does not meet the second preset condition, it controls the second optical switch module 108 to switch to the eighth optical fiber 208 to transmit the seventeenth optical signal.

[0053] The second control module 200 can not only determine whether the reverse service link is normal based on the electrical signal recovered from the receiving end, but also monitor the optical signals in each optical fiber in real time during the reverse transmission process. When a decline in the transmission quality of the current working optical fiber is detected, the second control module 200 can adjust the reverse transmission path in advance to reduce the impact of link failure on service transmission.

[0054] Specifically, during reverse service transmission, the fifth optical fiber 205 serves as the default service channel for the first reverse transmission link. The second control module 200 continuously acquires the optical signal status in the fifth optical fiber 205 and determines whether the current optical fiber can meet the service transmission requirements based on a second preset condition. When the detection result indicates that the optical signal in the fifth optical fiber 205 exhibits significant attenuation, increased bit errors, or link abnormalities, the second control module 200 controls the third optical switch module 122 to switch to the sixth optical fiber 206, allowing service data to continue being transmitted through the backup optical fiber in the first reverse transmission link, without waiting for the received electrical signal to recover and become abnormal before switching.

[0055] If the backup fiber in the first reverse transmission link also fails to meet the transmission requirements, it indicates that the first reverse transmission link may have a complete failure, such as an abnormal transmitting optical module, a splitter module failure, or the simultaneous failure of two fibers. In this case, the second control module 200 further activates the second reverse transmission link and prioritizes establishing a service transmission channel through the seventh fiber 207. When it is detected that the optical signal in the seventh fiber 207 cannot meet the second preset condition, the fourth optical switch module 124 is then controlled to switch to the eighth fiber 208, allowing the service data to continue transmission through another backup fiber, thereby completing the redundancy protection within the second reverse transmission link.

[0056] In this embodiment, the second preset condition is mainly used to reflect the real-time operating status of the reverse optical transmission link, while the first preset condition is mainly used to reflect the electrical signal quality after the reverse service is restored. The second control module 200 first responds quickly to the link based on the optical layer detection results. When it detects a decrease in fiber performance or an optical link anomaly, it can switch the transmission path in advance. Then, it verifies the switching effect by combining the electrical signal recovered at the receiving end to confirm that the new service link meets the transmission requirements. By combining optical layer detection and electrical layer detection, the limitations caused by judging solely based on optical signals or solely based on electrical signals can be effectively avoided.

[0057] and Figure 1Corresponding to the forward optical layer protection mechanism in the previous embodiment, this embodiment further establishes the same fast optical layer protection mechanism in the reverse transmission direction. This enables both the forward and reverse links to complete service switching in the early stages of fiber performance degradation, without waiting for significant deterioration in service quality before recovery. This not only shortens fault response time and reduces the probability of bit errors and packet loss, but also further improves the reliability, fault recovery capability, and service continuity of bidirectional optical network equipment, allowing the system to adapt to high-speed optical communication application scenarios with high real-time and stability requirements.

[0058] As one implementation, the first electrical protection module 102 includes: The first electrical signal merging unit 301 is connected to multiple first optical modules 101 and second optical modules 103 respectively, and is configured to merge multiple first electrical signals to obtain a second electrical signal, and output the second electrical signal to the second optical module 103. The first electrical signal copying unit 302 is connected to the first electrical signal merging unit and the third optical module 104 respectively, and is configured to copy the second electrical signal to obtain the third electrical signal, and output the third electrical signal to the third optical module 104. The first electrical signal decomposition unit 303 is connected to the second optical module 103, the third optical module 104 and a plurality of first optical modules 101 respectively. It is configured to receive the electrical signals output by the second optical module 103 and the third optical module 104, restore them to the corresponding multiple service electrical signals respectively, and output the multiple service electrical signals to the corresponding first optical module 101.

[0059] The first electrical protection module 102 is used to complete the aggregation, redundant replication and service recovery processing of service data. It includes a first electrical signal merging unit 301, a first electrical signal replication unit 302 and a first electrical signal decomposition unit 303. The functional units cooperate with each other to realize the unified management of service signals between the sending end and the receiving end.

[0060] Specifically, the first electrical signal combining unit 301 receives service electrical signals output by multiple first optical modules 101, and aggregates the service data from each channel according to preset rules to form a unified second electrical signal. By uniformly encapsulating and integrating multiple services, the processing objects of subsequent optical transmission modules can be reduced, enabling multiple services to share the same transmission link for transmission, thereby improving the utilization rate of the optical link, simplifying the circuit structure of the transmitting end, and reducing the system hardware cost.

[0061] Upon receiving the second electrical signal, the first electrical signal replication unit 302 performs redundant replication to generate two identical service data streams, which are then provided to the second optical module 103 and the third optical module 104 for photoelectric conversion, respectively. Each of the two service data streams corresponds to one of two independent transmission links. If one transmission link fails, the other transmission link can still maintain continuous transmission of the same service data, thus providing a data basis for link switching without the need to regenerate or resynchronize service data. This helps shorten fault recovery time and improve service continuity.

[0062] At the receiving end, the first electrical signal decomposition unit 303 receives the electrical signal recovered by the second optical module 103 or the third optical module 104, and according to the correspondence during service merging at the transmitting end, parses and splits the received service data to recover multiple independent service electrical signals, which are then output to the corresponding first optical module 101. Since the first electrical signal decomposition unit 303 can restore the converged services into their respective independent data streams, each first optical module 101 can still complete the transmission or processing of the corresponding service according to the original service interface without modifying the interface structure of the downstream service equipment, thereby ensuring that the entire system remains transparent to the service layer.

[0063] Through the coordinated operation of the first electrical signal merging unit, the first electrical signal copying unit, and the first electrical signal decomposition unit, this embodiment achieves unified aggregation of service data, dual-path redundant transmission, and receiver recovery. On the one hand, it improves the utilization rate of optical transmission resources and reduces the number of transmitting optical modules and transmission links required. On the other hand, during link switching, it ensures that the two transmitting links always transmit the same service content, eliminating the need to re-establish data connections during service recovery, effectively reducing switching latency, and improving system reliability, fault tolerance, and service continuity.

[0064] In one implementation, the second electrical protection module 111 includes: The second electrical signal merging unit 401 is connected to multiple sixth optical modules 112 and fourth optical modules 109 respectively, and is configured to merge multiple eleventh electrical signals to obtain a twelfth electrical signal, and output the twelfth electrical signal to the fourth optical module 109. The second electrical signal copying unit 402 is connected to the second electrical signal merging unit 401 and the fifth optical module 110 respectively. It is configured to copy the twelfth electrical signal to obtain the thirteenth electrical signal and output the thirteenth electrical signal to the fifth optical module 110. The second electrical signal decomposition unit 403 is connected to the fourth optical module 109, the fifth optical module 110 and a plurality of sixth optical modules 112 respectively. It is configured to receive the electrical signals output by the fourth optical module 109 and the fifth optical module 110, restore them to the corresponding multiple service electrical signals respectively, and output the multiple service electrical signals to the corresponding sixth optical module 112.

[0065] The second electrical protection module 111 is located at the other end of the optical network device and is used to complete the aggregation, redundant transmission and service recovery of reverse service data. It includes a second electrical signal merging unit 401, a second electrical signal copying unit 402 and a second electrical signal decomposition unit 403. The functional units cooperate with each other to realize the unified processing of reverse service data and together with the first electrical protection module 102, they form a bidirectional symmetrical data protection architecture.

[0066] Specifically, the second electrical signal combining unit 401 receives service electrical signals output from multiple sixth optical modules 112, aggregates the service data from each path, forms a unified service electrical signal, and then sends it to the fourth optical module 109 for subsequent optical signal transmission. By centrally processing multiple services, the optical transmission resources required during reverse transmission can be reduced, the utilization rate of the optical link can be improved, and the system hardware complexity can be reduced.

[0067] Subsequently, the second electrical signal replication unit 402 replicates the converged service electrical signal, generating two identical service data streams, which are then provided to the two reverse transmission links for transmission. Since the two transmission links always carry the same service content, when either reverse transmission link experiences a fiber optic failure, optical module failure, or link performance degradation, the system can quickly switch to the other transmission link to continue transmitting the service without needing to reacquire, repackage, or resynchronize the service data. This shortens the service recovery time and ensures the continuity of reverse communication.

[0068] At the receiving end, the second electrical signal decomposition unit 403 receives the electrical signal recovered by the fourth optical module 109 or the fifth optical module 110, and according to the correspondence during service aggregation, re-parses the unified service data into multiple independent service electrical signals, which are then output to the corresponding sixth optical module 112. In this way, each sixth optical module 112 can still complete the data processing or transmission of the corresponding service according to the original service interface, without the need to modify the downstream service equipment, ensuring that the service data can be accurately recovered to its corresponding service channel.

[0069] Through the coordinated operation of the second electrical signal merging unit, the second electrical signal copying unit, and the second electrical signal decomposition unit, this embodiment achieves a complete processing flow of service aggregation, dual-path redundant transmission, and service recovery in the reverse service transmission direction, forming a bidirectional protection mechanism with the first electrical protection module 102 that is corresponding to each other and structurally symmetrical. On the one hand, it improves the utilization efficiency of reverse optical transmission resources and reduces the number of optical modules and transmission links required; on the other hand, when a link fails, it can continue to transmit the same service data using another redundant transmission link, so that service switching does not require re-establishing a data connection, further improving the reliability, fault tolerance, and service continuity of the bidirectional optical network equipment.

[0070] In one implementation, the first control module 100 is further configured to: when the fourth or fifth electrical signal does not meet the first preset condition, acquire the electrical signal quality parameters of the corresponding electrical signal, determine the electrical signal degradation type based on the deviation between each electrical signal quality parameter and the target parameter, and compensate the corresponding electrical signal according to the degradation type; if the compensated electrical signal still does not meet the first preset condition and reaches the preset number of compensations or the preset compensation range, then control the corresponding optical switch module to perform fiber optic switching.

[0071] After receiving the fourth electrical signal output by the fourth optical module 109 or the fifth electrical signal output by the fifth optical module 110, the first control module 100 does not directly perform fiber optic switching based on the detection results. Instead, it first performs compensation control on the recovered electrical signal. Specifically, the first control module 100 acquires at least two electrical signal quality parameters from the fourth or fifth electrical signal, including bit error rate, signal amplitude, signal-to-noise ratio, clock recovery status, and jitter. Based on the deviation between each electrical signal quality parameter and the corresponding target parameter, it determines the degradation type of the current electrical signal. When it is determined that the electrical signal has slight abnormalities such as amplitude attenuation, frequency response imbalance, clock offset, or baseline drift, the first control module 100 controls the electrical signal compensation module to perform compensation processing on the corresponding electrical signal to improve the quality of the recovered electrical signal without immediately switching the optical transmission link.

[0072] The electrical signal compensation module may include at least one of a variable gain amplification unit, an equalization unit, a clock recovery unit, a DC bias adjustment unit, and a decision threshold adjustment unit. The first control module determines the corresponding compensation method based on different degradation types. For example, when the detected electrical signal amplitude is lower than the target amplitude, it controls the variable gain amplification unit to increase the amplification gain; when the detected electrical signal has high-frequency attenuation, it controls the equalization unit to adjust the equalization coefficient to compensate for high-frequency components; when the detected sampling clock offset, it controls the clock recovery unit to adjust the sampling phase so that the sampling time is again located in the optimal sampling region of the eye diagram; when the detected electrical signal has DC bias, it controls the DC bias adjustment unit to adjust the signal reference level, thereby improving the recovery quality of the electrical signal.

[0073] Furthermore, to avoid overcompensation or oscillation during the compensation process, the first control module 100 adopts a closed-loop compensation method to control the gradual adjustment of each compensation parameter. After each compensation is completed, the compensated fourth or fifth electrical signal is reacquired, and its electrical signal quality parameters are checked again. If the detection result shows that the compensated electrical signal meets the first preset condition, the current optical transmission link continues to transmit service data. If the compensated electrical signal still does not meet the first preset condition, the compensation parameters are adjusted until the preset number of compensations or the compensation amount reaches the preset range.

[0074] When the first control module 100 determines that the electrical signal quality has not recovered to meet the first preset condition after a preset number of compensations, it indicates that there is a fault in the current optical transmission link that cannot be eliminated by electrical signal compensation, such as fiber breakage, optical module failure, or severe link attenuation. At this time, the first control module 100 controls the corresponding optical switch module to switch to the backup optical fiber or backup transmission channel, and repeats the detection and compensation process for the recovered electrical signal after switching until the second electrical protection module receives an electrical signal that meets the first preset condition.

[0075] By adding an electrical signal compensation step between electrical signal detection and optical link switching, this implementation method creates a closed-loop control mechanism encompassing electrical signal detection, compensation, compensation verification, and link switching. When a link experiences only minor attenuation, increased noise, or clock skew—non-fatal faults—service quality can be restored primarily through electrical signal compensation without immediately switching to a backup link. This reduces the number of erroneous handovers, improves the utilization of existing links, shortens service recovery time, and further enhances the reliability and service continuity of optical network equipment.

[0076] As one implementation method, such as Figure 4As shown, the second electrical protection module 111 includes a second electrical signal merging unit 401, a second electrical signal copying unit 402, a first electrical signal decomposition module, and a second electrical signal decomposition module. The second electrical signal merging unit 401 is connected to multiple sixth optical modules 112 and a fourth optical module 109, respectively, and is used to converge multiple eleventh electrical signals to form a twelfth electrical signal. The second electrical signal copying unit 402 is connected to the second electrical signal merging unit 401 and a fifth optical module 110, respectively, and is used to copy the twelfth electrical signal into two identical service electrical signals, which are then provided to the fourth optical module 109 and the fifth optical module 110 for transmission.

[0077] The first electrical signal decomposition module is connected to the fourth optical module 109, the fifth optical module 110, and part of the sixth optical module 112, respectively; the second electrical signal decomposition module is connected to the fourth optical module 109, the fifth optical module 110, and the remaining part of the sixth optical modules 112, respectively. The multiple sixth optical modules 112 are divided into a first service group and a second service group according to service ports or service types, wherein the first service group corresponds to the first electrical signal decomposition module, and the second service group corresponds to the second electrical signal decomposition module.

[0078] During normal system operation, the fourth optical module 109 outputs a fourth electrical signal, and the fifth optical module 110 outputs a fifth electrical signal. The first control module 100 detects whether the fourth and fifth electrical signals meet the first preset condition. When the fourth electrical signal meets the first preset condition but the fifth electrical signal does not, the first electrical signal decomposition module receives the fourth electrical signal, restores the multiple service electrical signals corresponding to the first service group, and then outputs them to the corresponding sixth optical module 112. The second electrical signal decomposition module either suspends receiving the fifth electrical signal or maintains the previous operating state.

[0079] When the fifth electrical signal meets the first preset condition while the fourth electrical signal does not, the second electrical signal decomposition module receives the fifth electrical signal and restores the multiple service electrical signals corresponding to the second service group, and then outputs them to the corresponding sixth optical module 112 respectively; the first electrical signal decomposition module suspends receiving the fourth electrical signal or maintains the previous working state.

[0080] Furthermore, when the first control module 100 detects that both the fourth and fifth electrical signals meet the first preset condition, it indicates that both transmission links corresponding to the fourth optical module 109 and the fifth optical module 110 can stably complete service transmission. At this time, the first control module 100 controls the first electrical signal decomposition module and the second electrical signal decomposition module to simultaneously enter the working state. Specifically, the first electrical signal decomposition module receives the fourth electrical signal and restores the service data corresponding to the first service group; the second electrical signal decomposition module receives the fifth electrical signal and restores the service data corresponding to the second service group. Since the two electrical signal decomposition modules process different service groups respectively, they can simultaneously output service electrical signals to the corresponding multiple sixth optical modules 112, realizing parallel operation of the two service recovery links.

[0081] To improve the flexibility of service allocation, the first control module 100 can also dynamically adjust the service allocation relationship between the first service group and the second service group based on the current processing load of each electrical signal decomposition module. When it is detected that the processing load of the first electrical signal decomposition module is higher than a preset load threshold, while the second electrical signal decomposition module still has remaining processing capacity, the first control module 100 migrates some services from the first service group to the second service group and controls the second electrical signal decomposition module to restore the corresponding service data, thereby achieving service load balancing and avoiding the impact of insufficient processing capacity of a single path on service transmission efficiency.

[0082] Furthermore, to ensure the consistency of the two electrical signal recovery results, the first control module 100 can also acquire the service status information output by the first electrical signal decomposition module and the second electrical signal decomposition module respectively, and perform consistency verification based on the service frame sequence number, timestamp, or service identifier. When an anomaly or asynchrony is detected between the two service data streams, the first control module 100 prioritizes maintaining the output of the service with higher quality, while simultaneously readjusting the service recovery process of the other electrical signal decomposition module to ensure that the data received by the multiple sixth optical modules 112 remains consistent.

[0083] By setting up a first electrical signal decomposition module and a second electrical signal decomposition module, this embodiment expands the original single-path service recovery into dual-path parallel service recovery. When both the fourth and fifth electrical signals meet the first preset condition, the two electrical signals can recover data from different service groups and output them simultaneously. This not only improves the service processing capability and data throughput capability of the second electrical protection module 111, but also avoids the processing bottleneck caused by all services being processed by a single electrical signal decomposition module. This further improves the service recovery efficiency, system reliability, and multi-service concurrent transmission capability of the optical network equipment.

[0084] In one implementation, the first control module 100 can also adopt different compensation strategies according to the service type, and combine the first electrical signal decomposition module and the second electrical signal decomposition module to realize the parallel recovery of different services. The multiple sixth optical modules 112 correspond to multiple service ports, and each service port can be divided into a first service group and a second service group according to service characteristics. The first service group corresponds to the first electrical signal decomposition module for restoring service data, and the second service group corresponds to the second electrical signal decomposition module for restoring service data.

[0085] Specifically, the first control module 100 identifies the current service as a real-time control service, voice service, video service, or ordinary data service based on the service identifier, service priority, or service type, and adopts different electrical signal compensation strategies for different services. For real-time control services, due to the high requirements for latency and synchronization accuracy, the first control module 100 prioritizes adjusting the clock recovery unit and sampling phase to ensure that the recovered electrical signal has low clock jitter. For video services, it prioritizes controlling the equalization unit to improve high-frequency response and reduce bit error rate and packet loss rate to ensure continuous transmission of video data. For voice services, it prioritizes improving the signal-to-noise ratio and reducing data jitter. For ordinary data services, it prioritizes improving data frame integrity rate and signal amplitude to improve data transmission reliability.

[0086] After completing the electrical signal compensation for the corresponding service, the first control module 100 re-detects the quality parameters of the fourth and fifth electrical signals. When both the fourth and fifth electrical signals meet the first preset condition, it indicates that both service recovery links can stably transmit service data. At this time, the first control module 100 controls the first electrical signal decomposition module to receive the fourth electrical signal and restore the service electrical signal corresponding to the first service group; simultaneously, it controls the second electrical signal decomposition module to receive the fifth electrical signal and restore the service electrical signal corresponding to the second service group. Since the two electrical signal decomposition modules restore different service groups respectively, they can simultaneously output service data to multiple corresponding sixth optical modules 112, realizing parallel recovery of different services.

[0087] Furthermore, the first control module 100 can dynamically adjust the service composition of the first service group and the second service group according to different service types. When it is detected that the first service group contains a large number of real-time services, the first control module 100 prioritizes allocating real-time services to the first electrical signal decomposition module, while allocating video services or ordinary data services to the second electrical signal decomposition module, in order to reduce resource competition between real-time services and high-bandwidth services. When the number of real-time services changes or the service priority is adjusted, the first control module 100 can re-divide the two service groups and synchronously adjust the recovery relationship between the two electrical signal decomposition modules, so that each service is always recovered by the appropriate electrical signal decomposition module.

[0088] To further improve service recovery efficiency, the first control module 100 can also separately track the number of services, data throughput, and processing latency currently being recovered by the first and second electrical signal decomposition modules. When it is detected that the processing load of one of the electrical signal decomposition modules exceeds a preset load threshold, the first control module 100 can migrate some low-priority services to the other electrical signal decomposition module for recovery, while keeping high-priority services processed by the current electrical signal decomposition module. This ensures that high-priority services can obtain stable processing resources and improves overall service recovery efficiency.

[0089] Furthermore, to ensure that the services restored by the two electrical signal decomposition modules remain synchronized, the first control module 100 can also acquire the timestamp, frame number, or service sequence number of the output service data from the first and second electrical signal decomposition modules, respectively, and perform synchronization verification on the two restoration results based on the timestamp, frame number, or service sequence number. When a timing deviation is detected between the two service restorations, the first control module 100 controls the corresponding electrical signal decomposition module to adjust the service output timing or buffer depth, so that the restored service data of different service groups remain synchronized, avoiding the impact on data processing of downstream equipment due to different restoration delays.

[0090] In one specific implementation, when the first control module 100 detects that the quality of the fourth electrical signal is better than that of the fifth electrical signal, it can allocate real-time control services and high-priority services to the first electrical signal decomposition module for recovery, while allocating video services, file transfer services, or other low-priority services to the second electrical signal decomposition module for recovery. When the quality of the fifth electrical signal is better than that of the fourth electrical signal, the service allocation relationship is readjusted so that high-priority services are always recovered through the higher-quality electrical signal. This not only fully utilizes the two recovery links of the fourth and fifth electrical signals but also dynamically adjusts the service recovery strategy based on link quality, improving the transmission reliability of critical services.

[0091] Through the above implementation method, the first control module 100 organically combines service classification, electrical signal compensation, dual electrical signal decomposition module recovery, and dynamic service scheduling. When both the fourth and fifth electrical signals meet the first preset condition, the two electrical signals respectively recover service data of different types or priorities, and simultaneously output them to the corresponding multiple sixth optical modules 112. This not only improves the parallel service recovery capability of the second electrical protection module 111, but also enables the adoption of differentiated compensation and recovery strategies for different services, improves the transmission quality of critical services, and further enhances the service continuity, system reliability, and resource utilization of optical network equipment.

[0092] Example 2 This second embodiment provides an OTN / DWDM wavelength division transmission device, including the optical network device provided in the first aspect.

[0093] The OTN (Optical Transport Network) layer is used for service encapsulation, multiplexing, and electrical layer processing, while the DWDM (Dense Wavelength Division Multiplexing) layer is used for wavelength multiplexing, long-distance optical transmission, and optical layer protection. Multiple service signals, after processing by the OTN layer, are input to the optical network equipment in Example 1. The first electrical protection module performs service aggregation and redundancy replication, and the signals are transmitted via two independent transmission channels and multiple optical fibers. At the receiving end, the second electrical protection module parses the recovered service data, reconstructs it into multiple independent service signals, and then outputs them to the corresponding service interfaces.

[0094] During equipment operation, the first control module continuously monitors the service status recovered by each receiving channel and, in conjunction with the operational status of each fiber optic link, dynamically controls the optical switch module and service output path. When a fiber optic cable, optical module, or transmitting channel fails, it can automatically switch to the corresponding backup fiber optic cable or backup transmitting channel to continue service transmission without manual intervention, thereby ensuring the continuous and stable operation of OTN and DWDM channel services.

[0095] This embodiment applies the optical network equipment provided in Embodiment 1 to an OTN / DWDM wavelength division transmission device, enabling the device to simultaneously possess electrical layer service protection and optical layer link protection capabilities. On one hand, through service aggregation and redundant replication, the carrying capacity of the wavelength division device for multiple services and the utilization rate of optical fiber resources are improved. On the other hand, through dual transmission channels, dual fiber redundancy, and automatic switching mechanisms, rapid service recovery is achieved, effectively addressing situations such as fiber breaks, optical module failures, and transmission channel anomalies, shortening service interruption time, and improving the reliability, fault tolerance, and network operation stability of the OTN / DWDM wavelength division transmission device.

[0096] Example 3 A third aspect of this invention provides an optical network system, including the optical network device provided in the first aspect and a host computer, wherein the host computer is connected to the first control module. The host computer is also connected to the second control module.

[0097] The host computer is communicatively connected to both the first and second control modules. The optical network equipment is used for the aggregation, transmission, protection, and recovery of service data, while the host computer is used for unified management, operation monitoring, and parameter configuration of the entire optical network equipment.

[0098] Specifically, the host computer can establish communication connections with the first and second control modules via Ethernet, serial ports, or other communication interfaces. During operation, the first and second control modules upload the operating status of the corresponding optical transmission links, the working status of optical modules, the fiber switching status, the service recovery status, and alarm information to the host computer. The host computer then summarizes, analyzes, and displays all the operational data, enabling maintenance personnel to monitor the real-time operating status of the entire optical network system.

[0099] Furthermore, the host computer can also issue control commands to the first and second control modules to remotely configure and manage the optical network equipment. For example, the host computer can configure operational parameters such as service protection policies, optical switch switching policies, link switching thresholds, fault detection parameters, and alarm thresholds. When an anomaly is detected in a certain optical fiber, optical module, or service channel, the host computer can locate the fault based on the status information uploaded by each control module and send control commands to the corresponding control module to control the optical switch module to complete link switching or control the electrical protection module to complete service channel switching, thereby realizing remote maintenance and centralized management of the entire optical network system.

[0100] In some implementations, the host computer can also store historical operational data uploaded by the first and second control modules, and generate link operation logs, service switching records, fault statistics, and performance analysis results, providing data support for network maintenance, fault tracing, and equipment health status assessment. Simultaneously, the host computer can also perform unified scheduling of various optical network devices, achieving consistent configuration of protection parameters among multiple nodes and improving the overall collaborative control capability of the optical network.

[0101] This embodiment combines the host computer with the first and second control modules, further realizing centralized monitoring, unified configuration, and remote operation and maintenance management at the network level on the basis of local automatic protection of the equipment. On the one hand, it can obtain the operating status of the entire optical network system in real time, promptly detect link anomalies, and quickly locate faults; on the other hand, it can remotely issue control policies to adjust protection parameters and switch services, improve network maintenance efficiency, reduce manual on-site operations, and further enhance the intelligent management level, operational reliability, and overall operation and maintenance efficiency of the optical network system.

[0102] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. An optical network device, characterized in that: include: Multiple first optical modules, a first electrical protection module, a second optical module, a third optical module, a first beam splitter, a first optical switch module, a second beam splitter, a second optical switch module, a fourth optical module, a fifth optical module, a second electrical protection module, multiple sixth optical modules, and a first control module; Each of the first optical modules receives a first optical signal and converts the first optical signal into a first electrical signal; The first electrical protection module merges multiple first electrical signals to obtain a second electrical signal, and copies the second electrical signal to obtain a third electrical signal; The second optical module converts the second electrical signal into a second optical signal; the first optical splitter divides the second optical signal into a third optical signal and a fourth optical signal, which are transmitted through the first optical fiber and the second optical fiber, respectively; the fourth optical module converts the third optical signal or the fourth optical signal into a fourth electrical signal; the third optical module converts the third electrical signal into a fifth optical signal; the second optical splitter divides the fifth optical signal into a sixth optical signal and a seventh optical signal, which are transmitted through the third optical fiber and the fourth optical fiber, respectively; the fifth optical module converts the sixth optical signal or the seventh optical signal into a fifth electrical signal; the second electrical protection module outputs the received electrical signal to the corresponding sixth optical module; The first control module is configured to: control the first optical switch module to receive the third optical signal through the first optical fiber and output it to the fourth optical module; detect the fourth electrical signal, and if the fourth electrical signal does not meet a first preset condition, control the first optical switch module to switch to receiving the fourth optical signal transmitted through the second optical fiber and output it to the fourth optical module; re-detect the fourth electrical signal, and if the fourth electrical signal still does not meet the first preset condition, control the second optical switch module to receive the sixth optical signal through the third optical fiber and output it to the fifth optical module; If the fifth electrical signal does not meet the first preset condition, the second optical switch module is controlled to switch to receiving the seventh optical signal transmitted through the fourth optical fiber and output to the fifth optical module; until the second electrical protection module receives the fourth or fifth electrical signal that meets the preset condition and outputs to the corresponding sixth optical module. The first control module is further configured to: when the fourth electrical signal or the fifth electrical signal does not meet the first preset condition, acquire the electrical signal quality parameters of the corresponding electrical signal, determine the electrical signal degradation type based on the deviation between each electrical signal quality parameter and the target parameter, and compensate the corresponding electrical signal according to the degradation type; If the compensated electrical signal still does not meet the first preset condition and reaches the preset number of compensations or the preset compensation range, then the corresponding optical switch module is controlled to switch the optical fiber.

2. The optical network device as described in claim 1, characterized in that, The optical network device further includes: a second control module, a third optical splitting module, a third optical switch module, a fourth optical splitting module, and a fourth optical switch module; Each of the sixth optical modules receives the eleventh optical signal and converts it into an eleventh electrical signal; the second electrical protection module merges multiple eleventh electrical signals to obtain a twelfth electrical signal, and copies the twelfth electrical signal to obtain a thirteenth electrical signal; the fourth optical module converts the twelfth electrical signal into a twelfth optical signal; the third optical splitter divides the twelfth optical signal into a thirteenth and a fourteenth optical signal, which are transmitted through the fifth and sixth optical fibers, respectively; the fifth optical module converts either the thirteenth electrical signal or the fourteenth optical signal into a fifteenth optical signal; the fourth optical splitter divides the fifteenth optical signal into a sixteenth and a seventeenth optical signal, which are transmitted through the seventh and eighth optical fibers, respectively; the second optical module converts either the thirteenth or fourteenth optical signal output by the third optical switch module into a fourteenth electrical signal; the third optical module converts either the sixteenth or seventeenth optical signal output by the fourth optical switch module into a fifteenth electrical signal; the first electrical protection module outputs the received fourteenth or fifteenth electrical signal to the corresponding first optical module; The second control module is configured to: control the third optical switch module to transmit the thirteenth optical signal through the fifth optical fiber; detect the fourteenth electrical signal; if the fourteenth electrical signal does not meet the first preset condition, control the third optical switch module to switch to the sixth optical fiber to transmit the fourteenth optical signal; when the fourteenth electrical signal still does not meet the first preset condition, control the fourth optical switch module to transmit the sixteenth optical signal through the seventh optical fiber; detect the fifteenth electrical signal; if the fifteenth electrical signal does not meet the first preset condition, control the fourth optical switch module to switch to the eighth optical fiber to transmit the seventeenth optical signal; until the first electrical protection module receives the fourteenth or fifteenth electrical signal that meets the preset condition, and outputs it to the corresponding first optical module.

3. The optical network device as described in claim 1, characterized in that, The first control module is also configured to: When the third optical signal transmitted through the first optical fiber does not meet the second preset condition, the first optical switch module is controlled to switch to the second optical fiber to transmit the fourth optical signal. Alternatively, if the first control module detects that the sixth optical signal transmitted through the third optical fiber does not meet the second preset condition, it controls the second optical switch module to switch to the fourth optical fiber to transmit the seventh optical signal.

4. The optical network device as described in claim 2, characterized in that, The second control module is further configured to: when the thirteenth optical signal transmitted through the fifth optical fiber does not meet the second preset condition, control the third optical switch module to switch to the transmission of the fourteenth optical signal through the sixth optical fiber; Alternatively, when the second control module detects that the sixteenth optical signal transmitted through the seventh optical fiber does not meet the second preset condition, it controls the second optical switch module to switch to the transmission of the seventeenth optical signal through the eighth optical fiber.

5. The optical network device as described in claim 3 or 4, characterized in that, The second preset condition includes at least one of the following satisfying a preset threshold: optical power, bit error rate, signal-to-noise ratio, optical signal-to-noise ratio, receiver sensitivity, and link alarm information.

6. The optical network device as described in claim 1, characterized in that, The first preset condition includes at least one of the following satisfying a preset threshold: bit error rate, signal strength, signal-to-noise ratio, packet loss rate, and clock recovery status.

7. The optical network device as described in claim 2, characterized in that, The first electrical protection module includes: A first electrical signal combining unit is connected to a plurality of first optical modules and a second optical module respectively, and is configured to combine the plurality of first electrical signals to obtain a second electrical signal, and output the second electrical signal to the second optical module; The first electrical signal copying unit is connected to the first electrical signal merging unit and the third optical module respectively, and is configured to copy the second electrical signal to obtain the third electrical signal, and output the third electrical signal to the third optical module; The first electrical signal decomposition unit is connected to the second optical module, the third optical module and a plurality of the first optical modules respectively. It is configured to receive the electrical signals output by the second optical module and the third optical module, restore them to the corresponding plurality of service electrical signals respectively, and output the plurality of service electrical signals to the corresponding first optical module.

8. The optical network device as described in claim 2, characterized in that, The second electrical protection module includes: The second electrical signal combining unit is connected to multiple sixth optical modules and the fourth optical module respectively, and is configured to combine multiple eleventh electrical signals to obtain the twelfth electrical signal, and output the twelfth electrical signal to the fourth optical module; The second electrical signal copying unit, which is connected to the second electrical signal merging unit and the fifth optical module respectively, is configured to copy the twelfth electrical signal to obtain the thirteenth electrical signal and output the thirteenth electrical signal to the fifth optical module; The second electrical signal decomposition unit is connected to the fourth optical module, the fifth optical module and multiple sixth optical modules respectively. It is configured to receive the electrical signals output by the fourth optical module and the fifth optical module, restore them to the corresponding multiple service electrical signals, and output the multiple service electrical signals to the corresponding sixth optical module.

9. An OTN / DWDM wavelength division transmission device, characterized in that, Includes the optical network device as described in any one of claims 1 to 8.

10. An optical network system, characterized in that, It includes the optical network device according to any one of claims 1 to 8 and a host computer, wherein the host computer is connected to the first control module.

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