A cpo digital link transmission protection method

Abstract

The application discloses a CPO digital link transmission protection method, and relates to the technical field of digital information transmission link, and comprises the following steps: according to the link effective transmission margin gap, in combination with the service occupancy rate, the service importance identifier, the continuous degradation identifier and the supply light conversion efficiency, a transmission margin debt value and a debt type are generated; then, based on the debt distribution of a plurality of CPO optoelectronic interconnection digital links sharing an external laser source, available compensation optical power and recoverable optical power are determined, and a link optical power compensation, a modulator bias adjustment, an electrical link equalization adjustment or a digital service protection strategy is executed. After compensation, the link effective transmission margin and the supply light conversion efficiency are recalculated, a response coefficient is generated, and the transmission margin debt value and the transmission abnormality attribution identifier are updated. The application realizes dynamic rebalancing of the supply light resource shared among the plurality of digital links, and improves the digital link transmission quality protection capability, the error code control capability and the service protection capability.

Description

Technical Field

[0001] This invention relates to the field of digital information transmission link technology, and in particular to a CPO digital link transmission protection method. Background Technology

[0002] Co-packaged optics (CPO) technology, by integrating optical engines and switching chips in close proximity, significantly reduces power consumption and signal loss in high-speed interconnect links, and has become a key interconnect solution in data centers and high-performance computing. In CPO optoelectronic interconnect systems, each digital link carries high-speed service flows. Its transmission quality is affected not only by the received optical power, but also by the combined influence of FEC error correction event rate, service occupancy, service importance, electrical link balance, modulator bias, and the shared optical supply capability of external laser sources. Specifically, received optical power reflects the basic physical margin of the link receiver; the FEC error correction event rate reflects the error correction pressure of the digital service flow; service occupancy and service importance reflect the transmission guarantee requirements of the services carried by the link; and the electrical link balance and modulator bias affect the integrity and error performance of the high-speed digital signal.

[0003] However, the aforementioned independent adjustment strategies have two inherent limitations. First, the degradation of digital link transmission quality is usually not caused by a single factor. There is nonlinear coupling between optical power, modulator bias point, electrical link equalization state, service load, and temperature state. For example, temperature drift may simultaneously affect the modulator extinction ratio, photodetector responsivity, and FEC error correction event rate. Independent adjustment of a single variable makes it difficult to accurately identify the true cause of the degradation in digital link transmission quality. Second, existing methods lack a unified management mechanism for the competition for shared optical resources, the continuous degradation of bit error margin, and service protection requirements among multiple CPO optoelectronic interconnected digital links. When an external laser source simultaneously supplies light to multiple digital links, insufficient transmission margin in one digital link may stem from its own coupling degradation, modulator bias drift, insufficient electrical link equalization, or excessive optical resources occupied by other digital links. However, existing solutions cannot quantitatively track this transmission margin gap and its continuous evolution trend. Summary of the Invention

[0004] In view of the aforementioned existing problems, the present invention is proposed.

[0005] Therefore, this invention provides a CPO digital link transmission protection method to solve the problems of existing technologies, such as the single dimension of CPO optoelectronic interconnect digital link transmission quality evaluation, the difficulty in quantifying and tracking the continuous degradation of bit error margin, the lack of dynamic coordination in the competition for shared optical resources, and the difficulty in coordinating physical compensation and digital service protection.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] This invention provides a CPO digital link transmission protection method, comprising: during each transmission quality monitoring cycle, collecting the received optical power, input continuous wave monitoring optical power, FEC error correction event rate, service occupancy rate, service importance indicator, optical engine temperature, modulator bias voltage, electrical link equalization status, and output optical power, temperature, and adjustable capability indicator of the CPO optoelectronic interconnect digital link set and each CPO optoelectronic interconnect digital link, and calculating the effective transmission margin, optical conversion efficiency, modulator bias deviation, and electrical link equalization deviation; based on the difference between the effective transmission margin of the link and the effective transmission margin of the target link, and combined with the service occupancy rate and service importance indicator, etc., for each CPO optoelectronic interconnect digital link, and calculating the effective transmission margin of the link, the effective transmission margin of the target link, and the effective transmission margin of the target link, etc., and calculating the effective transmission margin of the link, the effective transmission margin of the target link, etc., and calculating the effective transmission margin of the target link, etc. ... The system identifies continuous degradation indicators and optical power conversion efficiency, generating transmission margin debt values ​​and debt types for each CPO optoelectronic interconnect digital link. Based on the transmission margin debt values ​​of each CPO optoelectronic interconnect digital link sharing the same external laser source, it calculates available compensation optical power and recoverable optical power, and combines this with adjustable capability indicators to determine link optical power compensation, modulator bias adjustment, electrical link equalization adjustment, or digital service protection strategies. After executing these strategies, the system recalculates the effective transmission margin and optical power conversion efficiency, generates response coefficients based on the actual compensation amount, updates the transmission margin debt value and transmission anomaly attribution indicators, and feeds this information back to the next transmission quality monitoring cycle.

[0008] As a preferred embodiment of the CPO digital link transmission protection method of the present invention, the effective transmission margin of the link includes: converting the received optical power and input continuous wave monitoring optical power collected by each CPO optoelectronic interconnect digital link into a linear power value; using the difference between the received optical power and the minimum received optical power required to maintain the target bit error rate as the basic margin, and deducting the equivalent margin reduction amount calculated by the FEC error correction event rate, the deviation of the optical engine temperature from the reference stable temperature, and the service occupancy rate respectively, to obtain the effective transmission margin of the link; the optical power conversion efficiency includes using the ratio of the received optical power to the input continuous wave monitoring optical power as the optical power conversion efficiency.

[0009] As a preferred embodiment of the CPO digital link transmission protection method of the present invention, the modulator bias deviation includes: taking the absolute value of the deviation of the modulator bias voltage relative to the reference bias voltage as the modulator bias deviation, and determining whether the modulator operating point deviates from the target extinction ratio or the target linear modulation range based on the modulator bias deviation; the electrical link equalization deviation includes taking the absolute value of the deviation of the electrical link equalization state relative to the reference electrical link equalization state as the electrical link equalization deviation.

[0010] As a preferred embodiment of the CPO digital link transmission protection method of the present invention, the transmission margin debt value includes: comparing the current effective transmission margin of each CPO optoelectronic interconnect digital link with the corresponding target effective transmission margin; when the current effective transmission margin is lower than the target effective transmission margin, it is determined that the current CPO optoelectronic interconnect digital link has a basic margin gap; when the current effective transmission margin reaches or exceeds the target effective transmission margin, it is determined that the current CPO optoelectronic interconnect digital link does not have a basic margin gap; updating the continuous degradation flag according to the basic margin gap; when the same CPO optoelectronic interconnect digital link has a basic margin gap within the transmission quality monitoring cycle, the continuous degradation flag of the current CPO optoelectronic interconnect digital link is increased cycle by cycle; when the current CPO optoelectronic interconnect digital link does not have a basic margin gap, the continuous degradation flag of the current CPO optoelectronic interconnect digital link is restored to its initial state; and the current light supply conversion efficiency of each CPO optoelectronic interconnect digital link is... The current optical supply conversion efficiency is compared with the corresponding reference optical supply conversion efficiency. When the current optical supply conversion efficiency is lower than the reference optical supply conversion efficiency, it is determined that there is a decrease in the optical supply conversion efficiency of the current CPO optoelectronic interconnect digital link. When the current optical supply conversion efficiency reaches or exceeds the reference optical supply conversion efficiency, it is determined that there is no decrease in the optical supply conversion efficiency of the current CPO optoelectronic interconnect digital link. Based on the service occupancy rate, service importance indicator, continuous degradation indicator, and decrease in optical supply conversion efficiency, the real-time compensation weight of the current CPO optoelectronic interconnect digital link is determined. The basic margin gap is weighted according to the real-time compensation weight to generate the new transmission margin debt of the current CPO optoelectronic interconnect digital link in the current transmission quality monitoring period. Based on the transmission margin debt value of the previous transmission quality monitoring period, the new transmission margin debt in the current transmission quality monitoring period, and the margin excess status of the current link's effective transmission margin being higher than the target link's effective transmission margin, the transmission margin debt value of the current CPO optoelectronic interconnect digital link in the current transmission quality monitoring period is updated.

[0011] In a preferred embodiment of the CPO digital link transmission protection method of the present invention, the debt type includes: comparing the current transmission margin debt value with a first debt threshold; when the current transmission margin debt value is less than the first debt threshold, determining the debt type of the current CPO optoelectronic interconnect digital link as debt-free; comparing the current transmission margin debt value with the first debt threshold and a second debt threshold respectively; when the current transmission margin debt value reaches the first debt threshold but is lower than the second debt threshold, determining the debt type of the current CPO optoelectronic interconnect digital link as transient debt; when the current transmission margin debt value reaches or exceeds the second debt threshold, continuing to determine whether the continuous degradation flag of the current CPO optoelectronic interconnect digital link meets the continuous degradation judgment condition; if the continuous degradation flag meets the continuous degradation judgment condition, determining the debt type of the current CPO optoelectronic interconnect digital link as continuous debt; when the current transmission margin debt value reaches or exceeds the second debt threshold, but the continuous degradation flag does not meet the continuous degradation judgment condition, maintaining the debt type of the current CPO optoelectronic interconnect digital link as transient debt.

[0012] As a preferred embodiment of the CPO digital link transmission protection method of the present invention, the calculation of available compensation optical power and recoverable optical power includes: determining the set of CPO optoelectronic interconnect digital links corresponding to the same external laser source, and selecting CPO optoelectronic interconnect digital links with transmission margin debt to be compensated from the set of CPO optoelectronic interconnect digital links; reading the safe output power limit, current output optical power and temperature status of the external laser source; determining the available compensation optical power that the external laser source can increase within the current transmission quality monitoring period based on the safe output power limit, current output optical power and temperature status; identifying the CPO... CPO (Central Optical Power Interconnection) digital links in the set of optical interconnection digital links have an effective transmission margin higher than the target link's effective transmission margin. Based on the branch optical power adjustment capability identifier of the CPO optical interconnection digital links with an effective transmission margin higher than the target link's effective transmission margin, CPO optical interconnection digital links that can participate in optical power recovery are identified. Based on the excess effective transmission margin status of the CPO optical interconnection digital links that can participate in optical power recovery, the recoverable optical power is determined. The available compensation optical power and the recoverable optical power are combined to obtain the total compensation resources available for the CPO optical interconnection digital links to be compensated within the current transmission quality monitoring period.

[0013] As a preferred embodiment of the CPO digital link transmission protection method of the present invention, the determination of link optical power compensation, modulator bias adjustment, electrical link equalization adjustment, or digital service protection strategy includes: determining the target optical power compensation amount for each CPO optoelectronic interconnect digital link to be compensated based on the total compensation resources and the transmission margin debt value of each CPO optoelectronic interconnect digital link to be compensated; distinguishing between transient debt digital links and persistent debt digital links based on the debt type of each CPO optoelectronic interconnect digital link to be compensated; for transient debt digital links, determining whether each CPO optoelectronic interconnect digital link to be compensated has modulator bias adjustment capability, and combining the modulator bias deviation amount to determine... Determine whether to perform modulator bias adjustment; for persistent debt digital links, determine whether each CPO optoelectronic interconnect digital link to be compensated has tributary optical power adjustment capability, and perform link optical power compensation if it has tributary optical power adjustment capability; for persistent debt digital links without tributary optical power adjustment capability, determine whether each CPO optoelectronic interconnect digital link to be compensated has modulator bias adjustment capability or electrical link equalization adjustment capability, and perform modulator bias adjustment or electrical link equalization adjustment accordingly; when link optical power compensation, modulator bias adjustment and electrical link equalization adjustment cannot meet the compensation requirements, determine the digital service protection strategy based on the transmission margin debt value and service importance identifier.

[0014] As a preferred embodiment of the CPO digital link transmission protection method of the present invention, the transmission anomaly attribution identifiers include insufficient light supply type, bias drift type, insufficient electrical balance type, coupling degradation type, thermal disturbance type, and composite anomaly type.

[0015] As a preferred embodiment of the CPO digital link transmission protection method of the present invention, the steps of recalculating the effective transmission margin and optical power conversion efficiency of the link after executing link optical power compensation, modulator bias adjustment, electrical link equalization adjustment or digital service protection strategy, and generating response coefficients based on the actual compensation amount are as follows: After completing link optical power compensation, modulator bias adjustment, electrical link equalization adjustment or digital service protection strategy, the link stabilization time is measured; the received optical power, input continuous wave monitoring optical power, FEC error correction event rate, service occupancy rate and optical engine temperature of the corresponding CPO optoelectronic interconnect digital link are re-acquired; based on the re-acquired received optical power, FEC error correction event rate, service occupancy rate and optical engine temperature, the compensated effective transmission margin of the link is recalculated; based on the re-acquired received optical power and input continuous wave monitoring optical power, the compensated optical power conversion efficiency is recalculated; based on the difference in effective transmission margin of the link before and after compensation, combined with the actual optical power compensation amount, the actual bias adjustment amount or the actual electrical link equalization adjustment amount, optical power compensation response coefficient, bias compensation response coefficient or electrical equalization compensation response coefficient are generated respectively.

[0016] As a preferred embodiment of the CPO digital link transmission protection method of the present invention, the specific steps of updating the transmission margin debt value and the transmission anomaly attribution identifier and feeding them back to the next transmission quality monitoring cycle are as follows:

[0017] When both the current CPO optoelectronic interconnect digital link's compensated effective transmission margin is not less than the target effective transmission margin within the current transmission quality monitoring period, and the compensated FEC error correction event rate is not higher than the target FEC error correction event rate within the current transmission quality monitoring period, the transmission quality of the current CPO optoelectronic interconnect digital link is deemed to have been effectively restored within the current transmission quality monitoring period. When the current CPO optoelectronic interconnect digital link is deemed to have been effectively restored within the current transmission quality monitoring period, the excess transmission margin (higher than the target effective transmission margin) is reduced. The system records the transmission margin debt value of the corresponding CPO optoelectronic interconnect digital link and the current effective status of transmission quality recovery of the CPO optoelectronic interconnect digital link. When the optical power compensation response coefficient, offset compensation response coefficient, or electrical equalization compensation response coefficient is lower than the corresponding response threshold, a transmission anomaly attribution identifier is generated based on changes in optical power conversion efficiency, optical engine temperature, and actual compensation type. The system adjusts the priority of the corresponding CPO optoelectronic interconnect digital link's link optical power compensation, modulator offset adjustment, electrical link equalization adjustment, or digital service protection strategy in the next transmission quality monitoring cycle based on the transmission anomaly attribution identifier. The updated transmission margin debt value, transmission anomaly attribution identifier, and adjusted priority are fed back to the next transmission quality monitoring cycle.

[0018] The beneficial effects of this invention are as follows: by using transmission margin debt values ​​and continuous degradation identifiers, it achieves quantitative tracking of cumulative transmission margin gaps and distinction between transient and continuous degradation; by calculating available compensation optical power and recoverable optical power, it achieves dynamic and coordinated allocation of compensation resources for multiple digital links under a shared external laser source; by matching debt type with adjustable capability identifiers, it achieves hierarchical selection of link optical power compensation, modulator bias adjustment, electrical link equalization adjustment, and digital service protection strategies; and by using response coefficients and transmission anomaly attribution identifiers as feedback, it achieves adaptive updating of degradation cause identification and compensation priority for the next transmission quality monitoring cycle. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. 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.

[0020] Figure 1 A flowchart for the CPO digital link transmission protection method.

[0021] Figure 2 A flowchart generated for transmitting margin debt values ​​and debt types.

[0022] Figure 3 A flowchart for determining total compensation resources and compensation strategies.

[0023] Figure 4 This is a flowchart showing the feedback of the response coefficient and the next transmission quality monitoring cycle.

[0024] Figure 5 This is a comparison chart of link transmission quality during the on-site monitoring period.

[0025] Figure 6 Comparison of multi-link compensation effects under shared external laser source conditions. Detailed Implementation

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0029] Reference Figures 1-6 As one embodiment of the present invention, this embodiment provides a CPO digital link transmission protection method, comprising the following steps:

[0030] S1. During each transmission quality monitoring cycle, collect the received optical power, input continuous wave monitoring optical power, FEC error correction event rate, service occupancy rate, service importance indicator, optical engine temperature, modulator bias voltage, electrical link equalization status, and output optical power, temperature, adjustable capability indicator of the CPO optoelectronic interconnect digital link set and each CPO optoelectronic interconnect digital link, and calculate the effective transmission margin, optical conversion efficiency, modulator bias deviation, and electrical link equalization deviation of each CPO optoelectronic interconnect digital link.

[0031] Furthermore, the CPO optoelectronic interconnect device includes an external laser source, a CPO optical engine, an optical power monitoring device, a temperature acquisition device, an FEC statistical register, a service counter, a modulator bias control circuit, an electrical link equalization control circuit, and a control processor for performing transmission quality monitoring and protection control.

[0032] The control processor can be a switching chip management processor, a board-level management controller, or a CPO optical engine management controller, which... The operating status of the CPO optoelectronic interconnect digital link and external laser source can be read through the SPI, MDIO, CMIS management interface, internal register bus or on-chip management channel.

[0033] In this embodiment, a data path that is supplied with continuous wave light by an external laser source and completes modulation, digital service transmission, reception, and error statistics is defined as a CPO optoelectronic interconnect digital link.

[0034] No. The term "CPO optoelectronic interconnect digital link" refers to any CPO optoelectronic interconnect digital link to be monitored and controlled. An external laser source refers to an external laser source that provides continuous wave light to one or more CPO optoelectronic interconnect digital links.

[0035] Furthermore, at the beginning of each transmission quality monitoring cycle, the control processor generates a monitoring cycle identifier and determines the number of cycles according to the pre-stored optical supply topology table. A set of CPO optoelectronic interconnect digital links corresponding to an external laser source.

[0036] If the CPO optoelectronic interconnect device adopts a fixed beam splitting structure, the set of digital links supplied to the CPO optoelectronic interconnect device is a pre-configured fixed set; if the CPO optoelectronic interconnect device adopts a switchable optical switch, adjustable coupler, or reconfigurable optical distribution structure, the control processor updates the set of digital links supplied to the CPO optoelectronic interconnect device according to the current optical switch status, coupler status, or optical path configuration table.

[0037] Simultaneously, the control processor reads the adjustable capability identifiers of each CPO optoelectronic interconnect digital link, including the branch optical power adjustment capability identifier, the modulator bias adjustment capability identifier, and the electrical link equalization adjustment capability identifier.

[0038] Among them, the branch optical power adjustment capability identifier, the modulator bias adjustment capability identifier, and the electrical link equalization adjustment capability identifier are all binary identifiers.

[0039] When the branch optical power adjustment capability flag value is 1, it indicates that the first branch optical power adjustment capability is 1. The CPO optoelectronic interconnect digital link has the ability to change the branch optical power through adjustable optical attenuators, adjustable couplers, optical switch allocation ratios, or equivalent optical power adjustment structures; when the modulator bias adjustment capability flag value is 1, it indicates that the first... The first CPO optoelectronic interconnect digital link has adjustable modulator bias voltage; when the link equalization adjustment capability flag value is 1, it indicates that the first... Each CPO optoelectronic interconnect digital link has adjustable electrical link balancing parameters.

[0040] Furthermore, the control processor collects the first data within the current transmission quality monitoring cycle. The received optical power and input continuous wave monitoring optical power of the CPO optoelectronic interconnect digital link.

[0041] The received optical power is obtained from the receiver's monitoring photodiode, the received optical power detection circuit, or the optical engine's digital diagnostic register, and is used to characterize the first... The actual optical signal power obtained at the receiving side of the CPO optoelectronic interconnect digital link is used as a basic physical parameter for judging the transmission quality and error margin of the digital link.

[0042] The input continuous wave monitoring optical power is obtained by a monitoring photodiode, a beam splitting monitoring port, or an input optical power detection circuit of the optical engine, located between the external laser source and the input terminal of the optical engine. This power is used to characterize the input optical power from the external laser source to the first continuous wave. The continuous wave optical power at the input of the CPO optoelectronic interconnect digital link modulator or optical engine is used to determine the impact of the input optical supply status on the transmission quality of digital services.

[0043] In one implementation, if the optical power unit directly reported by the device is dBm, the control processor first converts the dBm value into a linear power value before participating in subsequent calculations.

[0044] Furthermore, the control processor collects the first... The FEC error correction event rate, service occupancy rate, service importance indicator value, and optical engine temperature of each CPO optoelectronic interconnect digital link.

[0045] The FEC error correction event rate is obtained from the FEC statistics register and is used to characterize the error correction pressure and transmission quality degradation trend of digital service flows in the current link.

[0046] To avoid the incomparability of error correction counts due to different transmission quality monitoring cycle lengths, the control processor preferably uses a unit time normalization method to obtain the FEC error correction event rate, expressed as: ;

[0047] in, Indicates the first The FEC error correction event rate of the CPO optoelectronic interconnect digital link during the current transmission quality monitoring period. Indicates the first The cumulative FEC error correction event count of each CPO optoelectronic interconnect digital link at the end of the current transmission quality monitoring period. This represents the cumulative FEC error correction event count at the end of the previous transmission quality monitoring period. This indicates the length of the transmission quality monitoring cycle.

[0048] Service utilization rate is obtained from port traffic counters, queue occupancy counters, or switch chip port statistics registers.

[0049] Preferably, the service utilization rate is expressed as: ;

[0050] in, Indicates the first The service occupancy rate of each CPO optoelectronic interconnect digital link during the current transmission quality monitoring period. Indicates the first The actual service rate of the CPO optoelectronic interconnect digital link during the current transmission quality monitoring period. Indicates the first The rated maximum service rate of each CPO optoelectronic interconnect digital link.

[0051] The service occupancy rate ranges from 0 to 1 and is used to reflect the current service load level of the CPO optoelectronic interconnect digital link.

[0052] The service importance indicator value is obtained from network management policies, port service levels, service priority tables, or switching chip quality of service configuration.

[0053] The value of the service importance indicator can be a discrete level value, such as 0, 1, 2 or 3; the larger the value, the more important the service carried by the CPO optoelectronic interconnect digital link is, and the more priority should be given to ensuring optical margin and bit error rate performance.

[0054] The light engine temperature is close to the first Temperature data is obtained from temperature sensors, on-chip temperature diodes, thermistors, or internal temperature registers in the optical engine area where the CPO optoelectronic interconnect digital link is located.

[0055] If multiple CPO optoelectronic interconnect digital links share a single temperature acquisition point, the control processor will use the temperature of the acquisition point as the optical engine temperature of the corresponding CPO optoelectronic interconnect digital link based on the positional correspondence between the CPO optoelectronic interconnect digital link and the temperature acquisition point.

[0056] Furthermore, the control processor collects the first... The modulator bias voltage and electrical link balance status of a CPO optoelectronic interconnect digital link.

[0057] The modulator bias voltage is obtained from the modulator bias drive circuit, the bias DAC readback register, or the optical engine management register, and is used to characterize the current operating point of the modulator.

[0058] The modulator can be a silicon photonic Mach-Zehnder modulator, a micro-ring modulator, or other electro-optic modulators used in CPO optical engines.

[0059] The electrical link equalization state is obtained from the SerDes transmitter pre-emphasis configuration, receiver continuous-time linear equalization configuration, decision feedback equalization configuration, or link training register.

[0060] In this embodiment, the control processor normalizes multiple equilibrium parameters and combines them into an equivalent equilibrium state value.

[0061] For example, when the electrical link equalization state is composed of the transmitter pre-emphasis parameters, the receiver equalization parameters, and the decision feedback equalization parameters, it can be calculated as follows: ;

[0062] in, Indicates the first The electrical link balance status of the CPO optoelectronic interconnect digital links during the current transmission quality monitoring period. Indicates the first The pre-emphasis parameters at the transmitting end of each CPO optoelectronic interconnect digital link during the current transmission quality monitoring period. Indicates the first The equalization parameters at the receiver of each CPO optoelectronic interconnect digital link during the current transmission quality monitoring period. Indicates the first The decision feedback equalization parameters of the CPO optoelectronic interconnect digital link during the current transmission quality monitoring period. , and These represent the normalized weights of the electrical link equilibrium state.

[0063] It should be noted that the normalized weights for the electrical link equalization state are obtained through factory calibration of the link. Specifically, under different known channel loss conditions, the three types of equalization parameters are adjusted respectively, the contribution ratio of the FEC error correction event rate improvement is recorded, and each contribution ratio is normalized and used as the corresponding weight. The value range is typically 0 to 1, and the sum of all weights is 1. Preferably, The value is 0.3. The value is 0.4. The value is 0.3.

[0064] Furthermore, the control processor collects the first... The current output power and temperature of an external laser source are recorded, and the safe output power limit of the current external laser source is read.

[0065] The current output optical power can be obtained from the internal monitoring photodiode, output power detection circuit, or digital diagnostic information of the external laser source; the temperature of the external laser source can be obtained from the internal temperature sensor, thermistor, or temperature register of the external laser source; the safe output power limit is pre-configured based on the external laser source specifications, device lifespan constraints, thermal design constraints, and device power consumption strategy.

[0066] Furthermore, using the end time of the current transmission quality monitoring cycle as a unified time reference, multiple sampled values ​​collected within the same transmission quality monitoring cycle are averaged, have their last value preserved, or are filtered by median to obtain a set of status data corresponding to the transmission quality monitoring cycle identifier.

[0067] For received optical power, input continuous wave monitoring optical power, external laser source output optical power and temperature data, the control processor preferably uses sliding window mid-range filtering to suppress single-sampling glitches; for FEC error correction event rate and service occupancy rate, the control processor preferably uses incremental statistical values ​​within the current transmission quality monitoring period; for modulator bias voltage and electrical link equalization status, the control processor preferably uses register readback values ​​at the end of the transmission quality monitoring period.

[0068] When a certain acquired value is missing or exceeds the physical range allowed by the device, the control processor marks the acquired value as invalid and uses the corresponding data from the previous valid transmission quality monitoring cycle to maintain it.

[0069] Furthermore, after completing data acquisition and preprocessing, the control processor calculates the... The effective transmission margin of a CPO optoelectronic interconnect digital link.

[0070] Among them, the effective transmission margin of the link is used to represent the first The available optical power margin of a CPO optoelectronic interconnect digital link after deducting the effects of bit error trends, temperature drift, and service load within the current transmission quality monitoring period.

[0071] The effective transmission margin of a link is expressed as: ;

[0072] in, Indicates the first The CPO optoelectronic interconnect digital link in the current transmission quality monitoring cycle Effective transmission margin of the link within the link. Indicates the first The CPO optoelectronic interconnect digital link in the current transmission quality monitoring cycle Internal received optical power, Indicates the first The minimum received optical power required for a CPO optoelectronic interconnect digital link to maintain the target bit error rate performance. This represents the FEC error correction event rate reduction factor. Indicates the first The CPO optoelectronic interconnect digital link in the current transmission quality monitoring cycle FEC error correction event rate within the country, This represents the temperature deviation conversion factor. Indicates the first The optical engine corresponding to each CPO optoelectronic interconnect digital link is monitored during the current transmission quality period. The internal temperature Indicates the first The reference stable temperature of the optical engine corresponds to the CPO optoelectronic interconnect digital link. This represents the business occupancy rate conversion factor. Indicates the first The CPO optoelectronic interconnect digital link in the current transmission quality monitoring cycle The business occupancy rate within the system.

[0073] in, , and These are conversion factors, used to convert FEC error correction event rate, temperature deviation, and service occupancy rate into equivalent margin reductions in the same dimension as optical power.

[0074] It should be noted that the conversion factor is obtained through factory calibration. That is, under known conditions of received optical power, FEC error correction event rate, optical engine temperature, and service occupancy rate, the impact of changes in each factor on the link error margin or receive sensitivity margin is recorded, and determined using least squares fitting, table lookup calibration, or recursive update methods. The value range is usually greater than 0, wherein, preferably, The range of values ​​is usually 100. to / time, used to convert the FEC error correction event rate into an equivalent optical power margin reduction. The range of values ​​is usually 100. to This is used to convert the temperature deviation of the optical engine into an equivalent optical power margin reduction. The range of values ​​is usually 100. to It is used to convert the service occupancy rate into an equivalent optical power margin reduction.

[0075] Furthermore, the control processor according to the first The received optical power and input continuous wave monitoring optical power of the CPO optoelectronic interconnect digital link are used to calculate the light-to-electric conversion efficiency, which is expressed as: ;

[0076] in, Indicates the first The CPO optoelectronic interconnect digital link in the current transmission quality monitoring cycle Internal light conversion efficiency, Indicates the first The CPO optoelectronic interconnect digital link in the current transmission quality monitoring cycle Internal received optical power, Indicates the first The CPO optoelectronic interconnect digital link in the current transmission quality monitoring cycle The input continuous wave monitors the optical power.

[0077] Furthermore, the control processor according to the first Given the current modulator bias voltage and reference bias voltage of the CPO optoelectronic interconnect digital link, calculate the modulator bias deviation, expressed as: ;

[0078] in, Indicates the first The CPO optoelectronic interconnect digital link in the current transmission quality monitoring cycle Modulator bias deviation within the modulator. Indicates the first The modulator corresponding to the CPO optoelectronic interconnect digital link in the current transmission quality monitoring cycle The actual bias voltage inside, Indicates the first The reference bias voltage of the modulator corresponding to each CPO optoelectronic interconnect digital link.

[0079] Furthermore, the control processor according to the first The current electrical link balance state and reference electrical link balance state of each CPO optoelectronic interconnect digital link are used to calculate the electrical link balance deviation, which is expressed as: ;

[0080] in, Indicates the first The CPO optoelectronic interconnect digital link in the current transmission quality monitoring cycle The electrical link balance deviation within the device. Indicates the first The CPO optoelectronic interconnect digital link in the current transmission quality monitoring cycle The current power link balance status within the network, Indicates the first Reference electrical link balancing status of a CPO optoelectronic interconnect digital link.

[0081] It should be noted that the current power link balancing status is determined by reading the first... Each CPO optoelectronic interconnect digital link corresponds to the SerDes transmitter pre-emphasis configuration register, receiver CTLE equalization configuration register, and DFE tap coefficient register, and the average value of each parameter is obtained by normalization calculation.

[0082] Finally, the control processor combines the effective transmission margin of the link, the optical power conversion efficiency, the modulator bias deviation, the electrical link equalization deviation, the service occupancy rate, the importance indicator value, the temperature of the optical engine, the tributary optical power adjustment capability indicator, the modulator bias adjustment capability indicator, and the electrical link equalization adjustment capability indicator to form the first... The data set of transmission quality characteristics of each CPO optoelectronic interconnect digital link during the current transmission quality monitoring period is used to form the first set of CPO optoelectronic interconnect digital links, the current output optical power, the external laser source temperature, and the upper limit of safe output power. A set of light supply constraint data for an external laser source during the current transmission quality monitoring period.

[0083] S2. Based on the difference between the effective transmission margin of the link and the effective transmission margin of the target link, and combined with the service occupancy rate, service importance identifier, continuous degradation identifier and optical power conversion efficiency, generate the transmission margin debt value and debt type of each CPO optoelectronic interconnect digital link.

[0084] Furthermore, after completing the acquisition of photoelectric operating status and generation of transmission quality characteristics within the current transmission quality monitoring cycle, the control processor obtains the [number]th [unit / item]. The system retrieves the effective transmission margin, service occupancy rate, service importance indicator value, and optical conversion efficiency of each CPO optoelectronic interconnect digital link, and reads the transmission margin debt value and continuous degradation indicator value saved in the previous transmission quality monitoring cycle.

[0085] Among them, the transmission margin debt value is used to represent the first The cumulative amount of transmission quality recovery requirements for a single CPO optoelectronic interconnect digital link due to insufficient effective transmission margin, increased FEC error correction event rate, temperature drift, increased service load, increased service importance, or decreased optical power conversion efficiency.

[0086] It should be noted that the transmission margin debt value does not represent the actual stored optical energy or the actual lack of optical power, but is an intermediate control quantity used for digital link transmission quality monitoring and protection control. The larger the transmission margin debt value, the more the corresponding CPO optoelectronic interconnect digital link needs to obtain optical power compensation, modulator bias adjustment, electrical link equalization adjustment or digital service protection processing in subsequent steps.

[0087] Furthermore, the control processor reads the first... The target link effective transmission margin of a CPO optoelectronic interconnect digital link.

[0088] The effective transmission margin of the target link is automatically recorded by the device based on the stable operating status after the link training is completed.

[0089] Subsequently, the control processor calculates the first... The baseline margin gap of each CPO optoelectronic interconnect digital link within the current transmission quality monitoring period is expressed as: ;

[0090] in, Indicates the first The baseline margin gap of the CPO optoelectronic interconnect digital link within the current transmission quality monitoring period. Indicates the first The effective transmission margin of the target link in the current transmission quality monitoring period for each CPO optoelectronic interconnect digital link.

[0091] Within the current transmission quality monitoring period, if the effective transmission margin of the current link is not less than the effective transmission margin of the target link, it indicates that the [missing information]... If the current effective transmission margin of the CPO optoelectronic interconnect digital link meets the target requirement, then the basic margin gap is 0; if the current effective transmission margin is less than the target effective transmission margin, it indicates that the first... A CPO optoelectronic interconnect digital link has insufficient effective transmission margin. In this case, the basic margin gap is equal to the difference between the target effective transmission margin and the current effective transmission margin.

[0092] It should be noted that, in this embodiment, by setting a basic margin gap, whether the CPO optoelectronic interconnect digital link lacks effective transmission margin can be transformed into a non-negative basic margin gap, thus avoiding negative debt in CPO optoelectronic interconnect digital links with sufficient effective transmission margin.

[0093] Furthermore, the control processor updates the first [unclear] based on the basic margin gap. The continuous degradation identifier value of a CPO optoelectronic interconnect digital link.

[0094] Specifically, the method for updating the continuous degradation flag value is represented as follows: ;

[0095] in, Indicates the first The continuous degradation flag value of each CPO optoelectronic interconnect digital link during the current transmission quality monitoring period. This indicates the continuous degradation flag value from the previous transmission quality monitoring period. Indicates the length of the transmission quality monitoring period. This indicates the upper limit of the continuous degradation flag value.

[0096] When the If multiple CPO optoelectronic interconnect digital links are consecutive, and if there is a basic margin gap in all three transmission quality monitoring cycles, the continuous degradation flag value increases periodically; when the first... When the effective transmission margin of a CPO optoelectronic interconnect digital link recovers to or exceeds the effective transmission margin of the target link within the current transmission quality monitoring period, the continuous degradation flag value is set to zero.

[0097] It should be noted that in this embodiment, by setting a continuous degradation flag value, instantaneous disturbances and continuous degradation can be distinguished. For example, insufficient margin caused by a brief business burst or a single temperature sampling fluctuation will not be immediately judged as a serious debt.

[0098] Furthermore, the control processor reads the first... The reference optical supply conversion efficiency of the CPO optoelectronic interconnect digital link is given, and the decrease in optical supply conversion efficiency is calculated based on the current optical supply conversion efficiency, expressed as: ;

[0099] in, Indicates the first The decrease in light conversion efficiency of a single CPO optoelectronic interconnect digital link during the current transmission quality monitoring period. Indicates the first The reference light supply conversion efficiency of the CPO optoelectronic interconnect digital link under normal calibration conditions. Let the positive part of the function satisfy the following condition: .

[0100] During the current transmission quality monitoring period, if the optical supply conversion efficiency is not less than the reference optical supply conversion efficiency, it indicates that the [missing information] is [missing information]. The current optical conversion efficiency of the CPO optoelectronic interconnect digital link has not decreased, and the decrease in optical conversion efficiency is 0. When the optical conversion efficiency is less than the reference optical conversion efficiency, it indicates that the conversion capability between the input continuous wave light and the effective optical power on the receiving side has decreased, and the decrease in optical conversion efficiency is positive.

[0101] It should be noted that, in this embodiment, by setting the reduction in optical power conversion efficiency, the effects of coupling degradation, modulation efficiency reduction, local thermal disturbance, or receiver response reduction of the CPO optoelectronic interconnect digital link can be introduced into the optical power debt calculation in the form of the reduction in optical power conversion efficiency. This makes the debt value not only reflect whether the received optical power is low, but also whether the input light is effectively converted.

[0102] Furthermore, the control processor calculates the first [value] based on the service occupancy rate, service importance indicator value, continuous degradation indicator value, and decrease in light supply conversion efficiency. The real-time compensation weight of each CPO optoelectronic interconnect digital link is expressed as: ;

[0103] in, Indicates the first Real-time compensation weights for each CPO optoelectronic interconnect digital link during the current transmission quality monitoring period. Indicates the first The service occupancy weighting coefficient of each CPO optoelectronic interconnect digital link Indicates the first The service importance weighting coefficient of each CPO optoelectronic interconnect digital link Indicates the first The continuous degradation weighting coefficient of each CPO optoelectronic interconnect digital link. Indicates the first The weighting factor for the decrease in light conversion efficiency of a single CPO optoelectronic interconnect digital link. Indicates the first The service importance identifier value of each CPO optoelectronic interconnect digital link during the current transmission quality monitoring period.

[0104] It should be noted that the weight coefficients in the real-time compensation weights are obtained during the equipment factory calibration phase by separately perturbing the service occupancy rate, service importance level, number of consecutive degradation cycles, and optical power conversion efficiency, and recording the changes in the effective transmission margin of the corresponding link, followed by least-squares fitting. The value range is typically... Take values ​​from 0.1 to 1.0. Take a value between 0.2 and 2.0. Take a value of 0.05 to 0.5. Take values ​​from 0.2 to 3.0.

[0105] It should be noted that, under the same effective transmission margin gap, the higher the service occupancy rate, the higher the service importance, the longer the continuous degradation time, and the more obvious the decline in light supply conversion efficiency of the CPO optoelectronic interconnect digital link, the higher the real-time compensation weight. Therefore, the subsequent transmission margin debt value is not only determined by how much margin is missing, but also by whether the gap is continuous, whether the channel is important, and whether there is a decline in conversion efficiency in the channel.

[0106] In this embodiment, to prevent a single factor from excessively amplifying the debt value, the control processor performs a limit on the real-time compensation weight, that is, the real-time compensation weight shall not exceed the maximum allowed compensation weight.

[0107] It should be noted that the maximum allowable compensation weight is determined during the equipment factory calibration phase, based on the [specific criteria]. The maximum compensation gain allowed for a CPO optoelectronic interconnect digital link under the conditions of not triggering external laser source overpower, optical receiver overload, modulator bias out of bounds, and sudden increase in bit error rate is determined.

[0108] Furthermore, the control processor generates the first [presumably a specific value] based on the basic margin gap and real-time compensation weights. The new optical power debt of a CPO optoelectronic interconnect digital link during the current transmission quality monitoring period is represented as: ;

[0109] in, Indicates the first The optical power debt incurred by the CPO optoelectronic interconnect digital link during the current transmission quality monitoring period. Indicates the first Real-time compensation weight of each CPO optoelectronic interconnect digital link after amplitude limiting within the current transmission quality monitoring period.

[0110] It should be noted that when the first When there is no effective transmission margin gap in the CPO optoelectronic interconnect digital link, the basic margin gap is 0, then the first... The first CPO optoelectronic interconnect digital link will not incur new optical power debt; when the first When there is a gap in the effective transmission margin of a CPO optoelectronic interconnect digital link, the new optical power debt increases with the increase of the basic margin gap, and is further amplified with the service occupancy rate, service importance, degree of continuous degradation and the degree of decline in light supply conversion efficiency.

[0111] Furthermore, the control processor updates the transmission margin debt value saved in the previous transmission quality monitoring cycle, the currently added optical power debt, and the portion of the current effective transmission margin exceeding the target effective transmission margin. The current transmission margin debt value of the CPO optoelectronic interconnect digital link.

[0112] Specifically, the excess margin is calculated and expressed as: ;

[0113] in, Indicates the first The excess portion of the current effective transmission margin of a CPO optoelectronic interconnect digital link that is higher than the effective transmission margin of the target link.

[0114] When the When the effective transmission margin of a CPO optoelectronic interconnect digital link is insufficient, the excess margin value is 0; when the first... When the effective transmission margin of a CPO optoelectronic interconnect digital link is sufficient, the excess margin value is positive and used to repay historical optical power debt.

[0115] Then, the current transmission margin debt value is updated based on the margin excess value, where the update formula is expressed as: ;

[0116] in, Indicates the first The transmission margin debt value of each CPO optoelectronic interconnect digital link at the end of the current transmission quality monitoring period. Indicates the debt retention ratio. This represents the transmission margin debt value of the previous transmission quality monitoring period. This represents the debt repayment coefficient.

[0117] It should be noted that the debt retention factor and debt repayment factor are determined during the equipment factory calibration stage, by adjusting the first... The CPO optoelectronic interconnect digital link is subjected to step power disturbance, temperature disturbance, or service load disturbance. The time constant and margin recovery slope of the effective transmission margin of the link are recorded during the process of decreasing to recovering. The debt retention coefficient is usually in the range of 0.60 to 0.98, and the debt repayment coefficient is usually in the range of 0.1 to 1.5.

[0118] It should be noted that historical optical power debt is included in the current transmission quality monitoring cycle according to the debt retention coefficient. If the current link's effective transmission margin is insufficient, new debt will be generated. If the current link's effective transmission margin exceeds the target value, the portion will be used to repay historical debt. In this way, it is possible to avoid sudden changes in debt value caused by single-cycle fluctuations, while allowing the already stabilized CPO optoelectronic interconnect digital link to gradually release its compensation priority.

[0119] In a preferred embodiment, to prevent abnormal sampling from causing excessive debt values, the control processor imposes an upper limit on the transmission margin debt value, that is, the transmission margin debt value must not exceed the maximum allowed transmission margin debt value.

[0120] It should be noted that the maximum allowable transmission margin debt value is determined during the equipment factory calibration phase, based on the [specific parameters]. The maximum effective transmission margin gap of a CPO optoelectronic interconnect digital link that can be effectively compensated under the constraints of the upper limit of the safe output power of the external laser source, the overload threshold of the receiver, the adjustable range of the modulator bias, the adjustable range of the electrical link equalization, and the target bit error rate is determined.

[0121] Furthermore, the control processor according to the first The current transmission margin debt value, first debt threshold, second debt threshold, and continuous degradation flag value of each CPO optoelectronic interconnect digital link are used to determine the first... Debt type of a CPO optoelectronic interconnect digital link.

[0122] Debt type, represented as: ;

[0123] in, Indicates no debt. Indicates temporary debt; Indicates ongoing debt. Indicates the first debt threshold. Indicates the second debt threshold. This indicates the minimum number of consecutive degradation cycles required to determine persistent debt.

[0124] When the transmission margin debt value is less than the first debt threshold, it is considered that the first debt threshold is less than the second debt threshold. No debt compensation is required for the CPO optoelectronic interconnect digital link; when the transmission margin debt value is between the first debt threshold and the second debt threshold, it is considered that the first... The CPO optoelectronic interconnect digital link has transient debt; when the transmission margin debt value reaches or exceeds the second debt threshold, and the continuous degradation flag value reaches or exceeds the minimum number of continuous degradation cycles, it is considered that the first... There is a persistent debt in the CPO optoelectronic interconnect digital link; if the transmission margin debt value reaches or exceeds the second debt threshold, but the continuous degradation flag value does not exceed the minimum number of continuous degradation cycles, it will still be temporarily treated as a transient debt in order to avoid excessive compensation due to short-term shocks.

[0125] It should be noted that the first debt threshold and the second debt threshold are determined during the equipment factory calibration phase, based on the... The distribution of transmission margin debt values ​​for a CPO optoelectronic interconnect digital link is determined from the stages of normal margin, slight margin deficiency, to continuous bit error rate degradation. The first debt threshold typically ranges from [value missing]. to The second debt threshold typically ranges from [value missing]. to ,in, This indicates the maximum allowable transmission margin debt value; the minimum number of consecutive degradation cycles, determined during the equipment factory calibration phase based on the [specific parameters]. The statistical results of the transient margin fluctuation duration of a CPO optoelectronic interconnect digital link under service bursts, temperature disturbances and optical power disturbances were determined, so that the minimum number of continuous degradation cycles is greater than the typical transient fluctuation duration and less than the tolerable number of cycles before the link enters continuous bit error degradation.

[0126] Ultimately, the control processor is the first Each CPO optoelectronic interconnect digital link generates a set of debt data for the current transmission quality monitoring period.

[0127] The debt data set includes basic margin gap, decrease in light conversion efficiency, continuous degradation indicator value, real-time compensation weight after limiting, newly added optical power debt, current transmission margin debt value, and debt type.

[0128] S3. Based on the transmission margin debt value of each CPO optoelectronic interconnect digital link sharing the same external laser source, calculate the available compensation optical power and recoverable optical power, and in conjunction with the adjustable capability identifier, determine the optical power compensation, modulator bias adjustment, electrical link equalization adjustment or service protection strategy.

[0129] Furthermore, within the current transmission quality monitoring cycle, the control processor reads the first... A set of CPO optoelectronic interconnect digital links corresponding to an external laser source is selected, and CPO optoelectronic interconnect digital links with optical power debt, i.e., CPO optoelectronic interconnect digital links with transmission margin debt values ​​not less than the first debt threshold, are selected from the set of CPO optoelectronic interconnect digital links to form a set of digital links to be compensated.

[0130] When the set of digital links to be compensated is empty, it indicates that the first... Each CPO optoelectronic interconnect digital link corresponding to an external laser source has no optical power debt that needs to be processed. The control processor maintains the current output state of the external laser source and allows low-power fallback to be performed in the next transmission quality monitoring cycle based on the excess of the effective transmission margin of the link.

[0131] When the set of digital links to be compensated is not empty, the control processor continues to perform calculations of available compensated optical power and recoverable optical power.

[0132] Furthermore, the control processor according to the first Given the safe output power limit of an external laser source, its current output power, and the temperature of the external laser source, calculate the... The available compensation optical power of an external laser source is expressed as: ;

[0133] in, Indicates the first Available compensation optical power of an external laser source during the current transmission quality monitoring period. Indicates the first The safe output power limit of an external laser source Indicates the first The current output optical power of an external laser source. This represents the reduction factor for available compensating optical power due to the increase in external laser source temperature. Indicates the first The current temperature of an external laser source, Indicates the first The reference temperature of an external laser source.

[0134] When the current output optical power of the external laser source is lower than the upper limit of the safe output power, there is theoretically an increase in the compensation optical power. However, if the temperature of the external laser source is higher than the reference temperature, the available compensation optical power needs to be reduced according to the excess temperature, so as to avoid the laser source entering a high temperature and high stress working state and to avoid affecting the long-term transmission stability of multiple digital links due to excessive increase in optical supply capacity.

[0135] It should be noted that the reduction factor of the external laser source temperature increase on the available compensating optical power is obtained by adjusting the first... The external laser source is factory calibrated to obtain the maximum allowable increase in output optical power while meeting the target output stability, lifetime constraints, and bit error rate performance at different temperature points. A linear fit is then performed on the temperature increase and the decrease in allowable output optical power, and the resulting slope is used as the reduction factor for the available compensation optical power due to the temperature increase of the external laser source. The value range is typically [value missing]. to .

[0136] Furthermore, the control processor searches within the same set of CPO optoelectronic interconnect digital links for CPO links whose effective transmission margin is higher than that of the target link and which have branch optical power adjustment capabilities, and calculates the recoverable optical power, expressed as: ;

[0137] in, Indicates the first Each external laser source corresponds to the reclaimable optical power supplied within the CPO optoelectronic interconnect digital link set. Indicates the first Identifier of tributary optical power adjustment capability of a CPO optoelectronic interconnect digital link. Indicates the first The current effective transmission margin of the CPO optoelectronic interconnect digital link. Indicates the first The target link effective transmission margin of the CPO optoelectronic interconnect digital link. Indicates the first The percentage coefficient that allows for the recovery of excess effective transmission margin in a CPO optoelectronic interconnect digital link.

[0138] It should be noted that when the first When the branch optical power adjustment capability identifier of the CPO optoelectronic interconnect digital link is 1, it indicates that the first branch optical power adjustment capability is 1. The CPO optoelectronic interconnect digital link has the ability to change the branch optical power through adjustable optical attenuators, adjustable couplers, optical switch allocation ratios, or equivalent optical power adjustment structures; when the first When the branch optical power adjustment capability flag of a CPO optoelectronic interconnect digital link is 0, it indicates that the first branch optical power adjustment capability is 0. The CPO optoelectronic interconnect digital link does not participate in the calculation of recyclable optical power.

[0139] It should be noted that the first The percentage coefficient for recovering the excess effective transmission margin in a CPO optoelectronic interconnect digital link is determined by the first... The link margin recovery calibration is obtained by gradually reducing the first CPO optoelectronic interconnect digital link under different service occupancy, temperature and FEC error correction event rate conditions. The input optical power of the branch of the CPO optoelectronic interconnect digital link is recorded. The maximum proportion of the effective transmission margin that can be released before it drops to the target effective transmission margin is recorded. The maximum proportion of the margin is multiplied by a safety factor and used as the proportion coefficient for the recovery of the excess part of the effective transmission margin of the link. The value range is usually 0.1 to 0.8.

[0140] Furthermore, the control processor calculates the first [value] based on the available compensated optical power and the recoverable optical power. The total allocatable compensation optical power corresponding to each external laser source is expressed as: ;

[0141] in, This represents the total optical power available for compensating for optical power debt within the CPO optoelectronic interconnect digital link set during the current transmission quality monitoring period.

[0142] Furthermore, the control processor calculates the first... The total debt corresponding to each external laser source within the CPO optoelectronic interconnect digital link set is expressed as: ;

[0143] in, Indicates sharing the first The total optical power debt of all CPO optoelectronic interconnect digital links of all external laser sources during the current transmission quality monitoring period. Indicates the first Transmission margin debt value of a CPO optoelectronic interconnect digital link.

[0144] When sharing the first When the total optical power debt of all CPO optoelectronic interconnect digital links of an external laser source is greater than 0 during the current transmission quality monitoring period, the control processor calculates the... The target optical power compensation amount for each CPO optoelectronic interconnect digital link is expressed as: ;

[0145] in, Indicates the first The target optical power compensation amount that a CPO optoelectronic interconnect digital link should obtain according to the optical power debt ratio during the current transmission quality monitoring period.

[0146] When sharing the first When the total optical power debt of all CPO optoelectronic interconnect digital links of an external laser source is equal to 0 in the current transmission quality monitoring period, it indicates that there is no optical power debt in the set of CPO optoelectronic interconnect digital links, and the control processor sets the target optical power compensation amount of each CPO optoelectronic interconnect digital link to 0.

[0147] In a preferred embodiment, the control processor can also limit the target optical power compensation amount, that is, the target optical power compensation amount shall not exceed the maximum optical power that the CPO optoelectronic interconnect digital link is allowed to increase within a transmission quality monitoring cycle, so as to avoid optical power sudden changes causing receiver overload or link state oscillation.

[0148] Furthermore, the control processor according to the first The debt type, branch optical power adjustment capability identifier, modulator bias adjustment capability identifier, electrical link equalization adjustment capability identifier, modulator bias deviation, and electrical link equalization deviation of each CPO optoelectronic interconnect digital link are used to determine the actual compensation path.

[0149] Specifically, the control processor determines the actual compensation path according to the following conditions A1-A4:

[0150] A1. Prioritize bias fine-tuning or maintain observation for transient debts.

[0151] Specifically, when the type of debt That is, the first When a CPO optoelectronic interconnect digital link is a transient debt, the control processor first determines whether the modulator bias adjustment capability flag is met. And modulator bias deviation ,in, This indicates that the bias deviates from the threshold.

[0152] It should be noted that the bias deviation threshold is obtained through factory calibration, that is, by gradually changing the modulator bias voltage under different temperature and service rate conditions, recording the minimum bias offset corresponding to the start of degradation of the extinction ratio, received optical power or FEC error correction event rate, and using the minimum bias offset as the threshold, the value range is usually 0.01V to 0.2V.

[0153] If condition A1 is satisfied simultaneously, it means that the first... If a CPO optoelectronic interconnect digital link has a modulator operating point deviation and possesses modulator bias adjustment capability, the control processor will prioritize performing modulator bias fine-tuning to obtain the actual bias adjustment amount. And will not improve the quality of transmission during the current transmission quality monitoring period. The optical power compensation amount of a CPO optoelectronic interconnect digital link is set to 0.

[0154] The actual bias adjustment amount for modulator bias fine-tuning is performed as follows: ;

[0155] in, This indicates the actual bias adjustment amount. This indicates the direction of bias adjustment, determined by the modulator calibration curve or the response to the previous bias disturbance. This represents the bias adjustment ratio. This indicates the maximum allowable offset adjustment amount for a single transmission quality monitoring cycle.

[0156] Among them, the offset adjustment direction indicator It belongs to +1 and -1, where +1 corresponds to increasing the bias and -1 corresponds to decreasing the bias.

[0157] If condition A1 is not met under the transient debt, then the control processor maintains the first condition. The optical power allocation status of the CPO optoelectronic interconnect digital link, and the first The CPO optoelectronic interconnect digital link will be included in the next transmission quality monitoring cycle for continued observation; if multiple consecutive cycles still have outstanding issues, such as three transmission quality monitoring cycles, then the next cycle will be included in the next monitoring cycle. A single CPO optoelectronic interconnect digital link becomes a continuous debt.

[0158] It should be noted that the bias adjustment ratio is determined by adjusting the first... The modulator of the CPO optoelectronic interconnect digital link is obtained by bias perturbation calibration, that is, the modulator bias voltage is changed in a fixed small step size under the stable state of the link, and the response relationship between the change of modulator bias deviation and the link effective transmission margin, extinction ratio or FEC error correction event rate improvement is recorded. The slope of the response curve that satisfies the convergence speed and overshoot constraint is used as the bias adjustment ratio coefficient.

[0159] It should be noted that the maximum allowable offset adjustment for a single transmission quality monitoring cycle is determined by adjusting the first... The modulator of the CPO optoelectronic interconnect digital link is obtained by dynamic step response calibration, that is, the single-cycle bias voltage adjustment step size is gradually increased under different temperature and service rate conditions. The link is recorded to see if there is an extinction ratio overshoot, a sudden change in received optical power, a sudden increase in FEC error correction event rate, or link retraining. The maximum safe step size that does not trigger an anomaly is taken as the maximum allowable bias adjustment amount for a single transmission quality monitoring cycle.

[0160] A2. Perform optical power compensation on ongoing debt with branch optical power adjustment capability.

[0161] Specifically, when the type of debt That is, the first The CPO optoelectronic interconnect digital link is a continuous debt and meets the branch optical power adjustment capability identifier. At that time, the control processor adjusts the first [unclear] according to the target optical power compensation amount after amplitude limiting. Each CPO optoelectronic interconnect digital link performs tributary optical power compensation to obtain the actual optical power compensation amount.

[0162] In one implementation, if the first A tunable attenuator is installed in each CPO optoelectronic interconnect digital link tributary, and the current attenuation of the tunable attenuator is [value missing]. The control processor reduces the attenuation amount according to the target optical power compensation amount, expressed as: ;

[0163] in, This indicates the amount of attenuation reduction of the adjustable optical attenuator during the current transmission quality monitoring period. This represents the calibration function for converting the target optical power compensation amount into the attenuation adjustment amount. This indicates the maximum allowable attenuation adjustment amount for a single transmission quality monitoring cycle.

[0164] The actual optical power compensation amount is calculated by back-calculating from the actuator calibration curve: ;

[0165] in, This indicates the actual optical power compensation amount. This represents the calibration function that converts the actual attenuation reduction into the actual optical power compensation.

[0166] It should be noted that the maximum allowable attenuation adjustment amount for a single transmission quality monitoring cycle is determined by adjusting the first... The adjustable optical attenuator of the CPO optoelectronic interconnect digital link is dynamically calibrated. That is, under different received optical power, service occupancy rate and FEC error correction event rate, the attenuation adjustment step size in a single transmission quality monitoring cycle is gradually increased. The link is recorded to record whether there are sudden changes in received optical power, sudden increase in bit error, insufficient FEC margin or link retraining. The maximum attenuation change that does not trigger an anomaly is taken as the maximum allowable attenuation adjustment amount in a single transmission quality monitoring cycle.

[0167] A3. Perform bias adjustment on ongoing debt that does not have branch optical power adjustment capability but has bias drift.

[0168] Specifically, when the The CPO optoelectronic interconnect digital link meets the debt type And the branch optical power adjustment capability is indicated. And the modulator bias adjustment capability is indicated. And modulator bias deviation When, explain the first The CPO optoelectronic interconnect digital link has persistent debt, but lacks independent branch optical power adjustment capability, and the modulator bias is significantly off.

[0169] At this point, the control processor performs modulator bias adjustment to obtain the actual bias adjustment amount. .

[0170] The modulator bias adjustment still uses a limited step size method to avoid large adjustments that could cause modulator overshoot or momentary link interruption.

[0171] The actual bias adjustment in condition A3 is performed in the same way as the actual bias adjustment in condition A1 for modulator bias fine-tuning.

[0172] A4. Perform electrical link balance adjustment on persistent debt that does not have the conditions for optical power and bias adjustment but has balance deviation.

[0173] Specifically, when the The CPO optoelectronic interconnect digital link meets the debt type And the branch optical power adjustment capability is indicated. And the modulator bias adjustment capability is indicated. And the power link equalization adjustment capability indicator And the electrical link balance deviation When, explain the first A CPO optoelectronic interconnect digital link has persistent debt that cannot currently be addressed through tributary optical power adjustment or modulator bias adjustment. However, the electrical link equalization state deviates from the reference state. In this case, the control processor performs electrical link equalization adjustment to obtain the actual electrical link equalization adjustment amount. ,in, This indicates a deviation from the equilibrium threshold.

[0174] It should be noted that the equalization deviation threshold is obtained through link training calibration. That is, under known channel loss, temperature and rate conditions, the SerDes transmitter pre-emphasis, receiver CTLE and DFE tap parameters are gradually changed, and the minimum equalization state offset corresponding to the start of deterioration of eye diagram margin, FEC error correction event rate or link retraining probability is recorded. The minimum equalization state offset is used as the threshold, and the value range is usually 0.05 to 0.3.

[0175] In one implementation, the electrical link equalization adjustment is performed as follows: ;

[0176] in, This represents the actual electrical link balancing adjustment amount. This indicates the direction of electrical link equalization adjustment, determined by link training results, changes in eye diagram margin, or the equalization disturbance response from the previous transmission quality monitoring cycle. This represents the electrical link balancing adjustment ratio coefficient. This indicates the maximum allowable electrical link equalization adjustment during a single transmission quality monitoring cycle.

[0177] Among them, the direction indicator for electrical link equalization adjustment It belongs to +1 and -1, where +1 corresponds to increasing the bias and -1 corresponds to decreasing the bias.

[0178] It should be noted that the electrical link balancing adjustment ratio coefficient is determined by adjusting the first... The electrical links corresponding to the CPO optoelectronic interconnect digital links are obtained through equalization disturbance calibration. That is, under the stable state of the link, the pre-emphasis of the transmitting end, the continuous time linear equalization or decision feedback equalization parameters of the receiving end are adjusted with a preset small step size. The response relationship between the change of the electrical link equalization deviation and the improvement of eye diagram margin, FEC error correction event rate or link effective transmission margin is recorded. The slope of the response curve that meets the convergence speed and does not cause link oscillation constraints is used as the electrical link equalization adjustment ratio coefficient.

[0179] It should be noted that the maximum allowable electrical link equalization adjustment in a single transmission quality monitoring cycle is determined by adjusting the first... The electrical links corresponding to the CPO optoelectronic interconnect digital links are obtained through dynamic equalization step calibration. That is, under different rates, temperatures, received optical power and service occupancy rates, the equalization parameter adjustment step size within a single transmission quality monitoring cycle is gradually increased. Whether the link experiences a decrease in eye diagram margin, a sudden increase in FEC error correction event rate, CDR loss of lock or link retraining, the maximum equalization parameter change that does not trigger an anomaly is taken as the maximum allowable electrical link equalization adjustment amount for a single transmission quality monitoring cycle.

[0180] Furthermore, when the first When the total allocatable compensation optical power corresponding to an external laser source is less than the total compensation optical power required for the CPO optoelectronic interconnect digital link to be compensated, or when a certain persistent debt CPO optoelectronic interconnect digital link does not have the conditions for executable optical power compensation, modulator bias adjustment and electrical link equalization adjustment, the control processor determines the service protection strategy according to the compensation priority value.

[0181] No. The compensation priority value of each CPO optoelectronic interconnect digital link is calculated according to the following formula: ;

[0182] in, Indicates the first Compensation priority value for each CPO optoelectronic interconnect digital link.

[0183] It should be noted that, given the same transmission margin debt value, CPO optoelectronic interconnect digital links carrying more important services have a higher compensation priority; and given the same service importance, CPO optoelectronic interconnect digital links with a larger transmission margin debt value have a higher compensation priority.

[0184] The control processor determines the protection sequence according to the compensation priority value from high to low.

[0185] For CPO optoelectronic interconnect digital links with the highest compensation priority value, limited compensation optical power is allocated first, or its transmission rate, low bit error rate target, and FEC margin are maintained first.

[0186] For the CPO optoelectronic interconnect digital link with the lowest compensation priority and the highest persistent debt, the control processor executes at least one of the following service protection strategies:

[0187] First, reduce the number The service injection rate of the CPO optoelectronic interconnect digital link reduces the service load, thereby reducing the risk of bit errors and the effective transmission margin requirement of the link.

[0188] Second, migrate a portion, such as 30% of the business, to other CPO optoelectronic interconnect digital links with higher optical margins within the same device.

[0189] Third, the first The CPO optoelectronic interconnect digital link is set to a derated operation state, such as reducing the modulation order, reducing the port rate, or increasing the FEC protection level.

[0190] Fourth, generate maintenance alarms to alert the user. A single CPO optoelectronic interconnect digital link may suffer from coupling degradation, device aging, or anomalies that cannot be recovered through the current adjustable path.

[0191] Furthermore, after determining the compensation path, the control processor writes the corresponding control quantity into the execution object and records the actual compensation action data.

[0192] For CPO optoelectronic interconnect digital links that perform optical power compensation, the control processor outputs and records the actual optical power compensation amount.

[0193] For CPO optoelectronic interconnect digital links that perform modulator bias adjustment, the control processor outputs and records the actual bias adjustment amount.

[0194] For CPO optoelectronic interconnect digital links that perform electrical link equalization adjustments, the control processor outputs and records the actual electrical link equalization adjustment amount.

[0195] If a CPO optoelectronic interconnect digital link does not perform the corresponding compensation action within the current transmission quality monitoring period, the control processor will set the corresponding actual compensation amount of the CPO optoelectronic interconnect digital link to 0, that is, set the actual optical power compensation amount to 0, the actual bias adjustment amount to 0, and the actual electrical link equalization adjustment amount to 0.

[0196] Ultimately, the control processor will , , , , The compensation path identifier is written into the cache of the current transmission quality monitoring cycle.

[0197] S4. After compensation, recalculate the effective transmission margin and optical conversion efficiency of the link, generate response coefficients based on the actual compensation amount, update the transmission margin debt value and transmission anomaly attribution identifier, and feed it back to the next transmission quality monitoring cycle.

[0198] Furthermore, after completing optical power compensation, modulator bias adjustment, electrical link equalization adjustment, or service protection strategies within the current transmission quality monitoring cycle, the control processor does not immediately enter the next transmission quality monitoring cycle. Instead, it first allows the link to stabilize, enabling the received optical power, FEC error correction event rate, modulator operating point, electrical link equalization state, and temperature state of the CPO optoelectronic interconnect digital link to enter a relatively stable state.

[0199] It should be noted that the link stabilization time refers to the time interval reserved after optical power compensation, modulator bias adjustment, or electrical link equalization adjustment is completed, allowing optical power monitoring, FEC statistics, modulator operating point, and electrical link status to reach relative stability. The time interval of the link stabilization time can be 1 to 5 transmission quality monitoring cycles.

[0200] After the link stabilizes, the control processor re-acquires the data. The received optical power, input continuous wave monitoring optical power, FEC error correction event rate, service occupancy rate, optical engine temperature, modulator bias voltage, and electrical link balance status of the CPO optoelectronic interconnect digital link.

[0201] Furthermore, the control processor recalculates the first [data point] based on the compensated collected data. The effective transmission margin of the CPO optoelectronic interconnect digital link is determined, and the compensated light conversion efficiency is calculated based on the compensated received optical power and the input continuous wave monitoring optical power.

[0202] The difference between the effective transmission margin of the link before compensation and the effective transmission margin of the link after compensation is used as the improvement amount of the effective transmission margin of the link.

[0203] Meanwhile, by subtracting the light conversion efficiency before compensation from the light conversion efficiency after compensation, the difference is used as the improvement in light conversion efficiency.

[0204] Furthermore, the control processor reads and records the actual optical power compensation amount, the actual bias adjustment amount, and the actual electrical link equalization adjustment amount, and calculates the response coefficients based on the actual compensation actions performed.

[0205] Specifically, when the When the actual optical power compensation amount is greater than 0 in a CPO optoelectronic interconnect digital link, the control processor calculates the optical power compensation response coefficient, which is expressed as: ;

[0206] in, Indicates the first The CPO optoelectronic interconnect digital link's ability to improve the effective transmission margin of the link per unit actual optical power compensation. Indicates the first The link effective transmission margin improvement of a CPO optoelectronic interconnect digital link.

[0207] When the When the absolute value of the actual bias adjustment is greater than 0 in each CPO optoelectronic interconnect digital link, the control processor calculates the bias compensation response coefficient, expressed as: ;

[0208] in, Indicates the first The CPO optoelectronic interconnect digital link has the capability to improve the effective transmission margin of the link with a unit modulator bias adjustment.

[0209] When the When the absolute value of the actual electrical link equalization adjustment amount is greater than 0 for each CPO optoelectronic interconnect digital link, the control processor calculates the electrical equalization compensation response coefficient, which is expressed as: ;

[0210] in, Indicates the first The CPO optoelectronic interconnect digital link has the ability to improve the effective transmission margin of the link by adjusting the unit electrical link balance.

[0211] Furthermore, the control processor determines the first link's effective transmission margin, the target link's effective transmission margin, the compensated FEC error correction event rate, and the target FEC error correction event rate based on these parameters. Is the compensation for the CPO optoelectronic interconnect digital link effective?

[0212] Specifically, when the first condition is met simultaneously The effective transmission margin of the CPO optoelectronic interconnect digital link after compensation is not less than that of the first CPO link. The effective transmission margin of the target link in the current transmission quality monitoring period for the CPO optoelectronic interconnect digital link, and the first The FEC error correction event rate after compensation of the CPO optoelectronic interconnect digital link is no higher than that of the first CPO link. When determining the target FEC error correction event rate of a CPO optoelectronic interconnect digital link within the current transmission quality monitoring period, the first... The compensation for the CPO optoelectronic interconnect digital link is effective within the current transmission quality monitoring period.

[0213] When at least one of the two conditions is not met, the decision is made based on the condition that the first condition is not met. The compensation for the CPO optoelectronic interconnect digital link was not fully effective during the current transmission quality monitoring period, and it is necessary to proceed to the transmission anomaly attribution judgment.

[0214] Furthermore, when the first When a CPO optoelectronic interconnect digital link is determined to be compensated, the control processor updates the transmission margin debt value based on the excess portion of the compensated link's effective transmission margin.

[0215] First, calculate the compensated excess margin, expressed as: ;

[0216] in, This represents the portion of the compensated link's effective transmission margin that exceeds the target link's effective transmission margin. Indicates the compensation after the first The effective transmission margin of a CPO optoelectronic interconnect digital link.

[0217] Then, the control processor updates the transmission margin debt value as follows: ;

[0218] in, This represents the updated transmission margin debt value obtained after compensation verification. Indicates the debt repayment coefficient. This represents the contribution coefficient of the margin improvement to debt repayment.

[0219] It should be noted that the contribution coefficient of the margin improvement to debt repayment is obtained by analyzing the first... The debt recovery calibration of the CPO optoelectronic interconnect digital link is obtained by applying a known compensation amount under different transmission margin debt values, service occupancy rates and temperature conditions. The holding time, the degree of decline of FEC error correction event rate and the probability of re-degradation after the effective transmission margin of the link exceeds the effective transmission margin of the target link are recorded. The slope of the margin improvement amount that can make the debt value decrease smoothly without triggering repeated compensation is used as the contribution coefficient of the margin improvement amount to debt repayment.

[0220] Furthermore, when the first When the compensation of a CPO optoelectronic interconnect digital link is not fully effective within the current transmission quality monitoring cycle, the control processor generates a transmission anomaly attribution identifier based on the response coefficient, the amount of improvement in light conversion efficiency, temperature changes, and actual compensation actions.

[0221] Among them, the transmission anomaly attribution identifier is used to characterize the first The type of cause corresponding to the current degradation of the CPO optoelectronic interconnect digital link.

[0222] Among them, the transmission anomaly attribution identifiers include insufficient light supply, bias drift, insufficient electrical balance, coupling degradation, thermal disturbance, and composite anomaly.

[0223] Specifically, for insufficient light supply attribution, when the following conditions are met... ,and ,and At that time, the control processor will set the transmission anomaly attribution flag to insufficient light supply type.

[0224] in, This represents the minimum optical power response threshold for determining whether optical power compensation is effective.

[0225] It should be noted that the minimum optical power response threshold is determined by applying a known small amount of optical power compensation to the CPO optoelectronic interconnect digital link under normal temperature and stable service load conditions, recording the effective transmission margin improvement of the link, and determining the safe reduction value of the margin improvement capability corresponding to the unit optical power compensation measured multiple times as the minimum optical power response threshold. The value range is usually 0.2 to 0.8.

[0226] Attributing non-insufficient light supply to the cause, when the following conditions are met: ,and ,and At that time, the control processor sets the transmission anomaly attribution flag to the coupling degradation type.

[0227] in, This indicates the threshold for improving light conversion efficiency.

[0228] It should be noted that the threshold for improving optical power conversion efficiency is determined by applying known optical power compensation or bias fine-tuning multiple times under normal temperature, stable service load and no coupling anomalies conditions on the CPO optoelectronic interconnect digital link, statistically analyzing the natural fluctuation range of optical power conversion efficiency, and then adding a safety margin to the upper limit fluctuation value to determine the threshold for improving optical power conversion efficiency. The value range is usually 0.005 to 0.05.

[0229] Bias-shift attribution, when satisfying ,and ,and At that time, the control processor sets the transmission anomaly attribution flag to bias drift type.

[0230] in, This represents the minimum bias response threshold for determining whether modulator bias adjustment is effective.

[0231] It should be noted that the minimum bias response threshold is determined by applying multiple known small-amplitude perturbations to the modulator bias voltage under normal optical power, stable temperature, and stable service load conditions on the CPO optoelectronic interconnect digital link, recording the corresponding effective transmission margin improvement, and determining the safe reduction value of the margin improvement capability corresponding to the unit bias adjustment as the minimum bias response threshold. The value range is typically from 0.05mW / V to 0.5mW / V.

[0232] Electrical imbalance deficiency attribution, when satisfied ,and ,and At that time, the control processor will set the transmission anomaly attribution flag to insufficient power balance.

[0233] in, This represents the minimum electrical balance response threshold for determining whether an electrical link balance adjustment is effective.

[0234] It should be noted that the minimum electrical equalization response threshold is determined by applying a known small perturbation to the pre-emphasis parameters of the transmitter, equalization parameters of the receiver, or decision feedback equalization parameters under normal optical power, stable temperature, and stable service load conditions of the CPO optoelectronic interconnect digital link, recording the corresponding effective transmission margin improvement amount of the link, and determining the safe reduction value of the margin improvement capability corresponding to the unit equalization adjustment amount as the minimum electrical equalization response threshold. The value range is usually 0.02 to 0.3.

[0235] Thermal disturbance attribution: The control processor determines whether thermal disturbance exists based on the temperature change of the optical engine before and after compensation and the improvement of the effective transmission margin of the link.

[0236] The difference between the light engine temperatures before and after compensation is calculated to obtain the change in light engine temperature. When the change in light engine temperature is satisfied... ,and At that time, the control processor sets the transmission anomaly attribution flag to thermal disturbance type.

[0237] in, This indicates the temperature change threshold of the light engine.

[0238] It should be noted that the temperature change threshold is determined by gradually changing the operating temperature of the optical engine and recording the changes in the effective transmission margin of the link while keeping the external laser source power, service load, and electrical link parameters stable. The temperature change that first causes the effective transmission margin of the link to drop beyond the allowable fluctuation range is defined as the temperature change threshold of the optical engine. The value range is typically [value missing]. to .

[0239] Composite anomalous attribution, when the first When a CPO optoelectronic interconnect digital link simultaneously meets two or more transmission anomaly attribution conditions, the control processor sets the transmission anomaly attribution flag to a composite anomaly type.

[0240] Furthermore, the control processor will... The updated transmission margin debt value, transmission anomaly attribution identifier, continuous degradation identifier value, and compensation effect record of each CPO optoelectronic interconnect digital link are written into the input cache of the next transmission quality monitoring cycle.

[0241] In the next transmission quality monitoring cycle, debt accumulation or debt repayment is performed using the updated transmission margin debt value and continuous degradation flag value; compensation paths are selected using transmission anomaly attribution flags; if a CPO optoelectronic interconnect digital link is marked as coupling degradation type, the proportion of compensation obtained by increasing external laser source power for the CPO optoelectronic interconnect digital link is reduced in the next transmission quality monitoring cycle; if a CPO optoelectronic interconnect digital link is marked as bias drift type, the priority of modulator bias calibration is increased; if a CPO optoelectronic interconnect digital link is marked as insufficient electrical balance type, the priority of electrical link balance adjustment is increased; if a CPO optoelectronic interconnect digital link is marked as thermal disturbance type, the temperature-related conversion factor is increased.

[0242] In this embodiment, Figure 5 The diagram illustrates how the link transmission quality changes under different control methods when the shared external laser source experiences light supply fluctuations or thermal disturbances.

[0243] As shown in the figure, after the 8th cycle, the average effective transmission margin of the traditional independent control remains below the target threshold of 3.0 dB, and the FEC error correction event rate gradually increases. The frequency of times per second indicates that it is difficult to identify and suppress multi-link coupling degradation in a timely manner.

[0244] After adopting the collaborative control of this invention, although the margin briefly decreases in the initial stage of disturbance, it can recover to above the target margin within about 5 cycles through the transmission of margin debt value, continuous degradation flag, and response coefficient feedback, and the steady-state FEC error correction event rate is reduced to approximately The speed of times per second demonstrates the effectiveness of this method in quantizing and tracking transmission margin gaps, suppressing bit error trends, and adaptively updating compensation priorities.

[0245] In this embodiment, Figure 6 The multi-link compensation effect is shown when 8 CPO optoelectronic interconnect digital links share 1 external laser source.

[0246] Under traditional independent control, the effective transmission margin of links L2, L4, L6, and L7 is still below the target of 3.0dB after control, and the number of links that meet the standard is only 4 / 8, indicating that independent adjustment of a single link is difficult to solve the problem of uneven distribution of shared optical resources.

[0247] The collaborative control of this invention identifies the recoverable optical power of links with high margins, such as L1 and L5, and allocates compensation resources to key compensation links such as L2, L4, and L7, so that all eight links reach or exceed the target margin.

[0248] The results show that the proposed method can dynamically rebalance based on available compensation optical power and recoverable optical power, and achieve hierarchical compensation by combining debt type and adjustable capability identifier, thereby improving the overall transmission stability and service protection capabilities in scenarios with shared external laser sources.

[0249] In summary, this invention achieves quantitative tracking of cumulative transmission margin gaps and differentiation between transient and continuous degradation by using transmission margin debt values ​​and continuous degradation identifiers; it achieves dynamic and coordinated allocation of compensation resources for multiple digital links sharing an external laser source by calculating available compensation optical power and recoverable optical power; it achieves hierarchical selection of link optical power compensation, modulator bias adjustment, electrical link equalization adjustment, and digital service protection strategies by matching debt type with adjustable capability identifiers; and it achieves adaptive updating of degradation cause identification and compensation priority for the next transmission quality monitoring cycle by using response coefficient and transmission anomaly attribution identifier feedback.

[0250] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A CPO digital link transmission protection method, characterized in that, include: During each transmission quality monitoring cycle, the received optical power, input continuous wave monitoring optical power, FEC error correction event rate, service occupancy rate, service importance indicator, optical engine temperature, modulator bias voltage, and electrical link balance status of each CPO optoelectronic interconnect digital link are collected, as well as the output optical power, temperature, adjustable capability indicator of the CPO optoelectronic interconnect digital link set and each CPO optoelectronic interconnect digital link. The effective transmission margin, optical conversion efficiency, modulator bias deviation, and electrical link balance deviation of the link are calculated. The effective transmission margin of the link includes converting the received optical power and input continuous wave monitoring optical power collected by each CPO optoelectronic interconnect digital link into a linear power value. The effective transmission margin of the link is obtained by taking the difference between the received optical power and the minimum received optical power required to maintain the target bit error rate as the basic margin, and deducting the equivalent margin reduction calculated by the FEC error correction event rate, the deviation of the optical engine temperature from the reference stable temperature, and the service occupancy rate respectively. The light conversion efficiency includes the ratio of received optical power to input continuous wave monitoring optical power as the light conversion efficiency. Based on the difference between the effective transmission margin of the link and the effective transmission margin of the target link, and combined with the service occupancy rate, service importance indicator, continuous degradation indicator and light supply conversion efficiency, the transmission margin debt value and debt type of each CPO optoelectronic interconnect digital link are generated. Based on the transmission margin debt value of each CPO optoelectronic interconnect digital link sharing the same external laser source, the available compensation optical power and recoverable optical power are calculated, and combined with the adjustable capability identifier, the link optical power compensation, modulator bias adjustment, electrical link equalization adjustment or digital service protection strategy is determined. After implementing link optical power compensation, modulator bias adjustment, electrical link equalization adjustment, or digital service protection strategies, the effective transmission margin and optical power conversion efficiency of the link are recalculated. Response coefficients are generated based on the actual compensation amount, the transmission margin debt value and transmission anomaly attribution identifier are updated, and feedback is given to the next transmission quality monitoring cycle.

2. The CPO digital link transmission protection method as described in claim 1, characterized in that, The modulator bias deviation includes: The absolute value of the deviation of the modulator bias voltage from the reference bias voltage is used as the modulator bias deviation, and the modulator operating point is determined to be deviated from the target extinction ratio or the target linear modulation range based on the modulator bias deviation. The electrical link balance deviation includes the absolute value of the deviation between the electrical link balance state and the reference electrical link balance state as the electrical link balance deviation.

3. The CPO digital link transmission protection method as described in claim 1, characterized in that, The transmission margin debt value includes: The current effective transmission margin of each CPO optoelectronic interconnect digital link is compared with the corresponding target effective transmission margin. When the current effective transmission margin is lower than the target effective transmission margin, it is determined that there is a basic margin gap in the current CPO optoelectronic interconnect digital link. When the current link's effective transmission margin reaches or exceeds the target link's effective transmission margin, it is determined that there is no basic margin gap in the current CPO optoelectronic interconnect digital link. The continuous degradation flag is updated based on the basic margin gap. When the same CPO optoelectronic interconnect digital link has a basic margin gap within the transmission quality monitoring period, the continuous degradation flag of the current CPO optoelectronic interconnect digital link is increased cycle by cycle. When there is no basic margin gap in the current CPO optoelectronic interconnect digital link, the continuous degradation flag of the current CPO optoelectronic interconnect digital link will be restored to the initial state; The current light supply conversion efficiency of each CPO optoelectronic interconnect digital link is compared with the corresponding reference light supply conversion efficiency. When the current light supply conversion efficiency is lower than the reference light supply conversion efficiency, it is determined that there is a decrease in the light supply conversion efficiency of the current CPO optoelectronic interconnect digital link. When the current light supply conversion efficiency reaches or exceeds the reference light supply conversion efficiency, it is determined that there is no decrease in light supply conversion efficiency in the current CPO optoelectronic interconnect digital link; Based on the service occupancy rate, service importance indicator, continuous degradation indicator, and decrease in light supply conversion efficiency, the real-time compensation weight of the current CPO optoelectronic interconnect digital link is determined, and the basic margin gap is weighted according to the real-time compensation weight to generate the new transmission margin debt of the current CPO optoelectronic interconnect digital link in the current transmission quality monitoring period. Based on the transmission margin debt value of the previous transmission quality monitoring period, the newly added transmission margin debt in the current transmission quality monitoring period, and the excess status of the current link's effective transmission margin being higher than the target link's effective transmission margin, update the transmission margin debt value of the current CPO optoelectronic interconnect digital link in the current transmission quality monitoring period.

4. The CPO digital link transmission protection method as described in claim 3, characterized in that, The types of debt include: The current transmission margin debt value is compared with the first debt threshold. When the current transmission margin debt value is less than the first debt threshold, the debt type of the current CPO optoelectronic interconnect digital link is determined to be debt-free. The current transmission margin debt value is compared with the first debt threshold and the second debt threshold respectively. When the current transmission margin debt value reaches the first debt threshold but is lower than the second debt threshold, the debt type of the current CPO optoelectronic interconnect digital link is determined to be transient debt. When the current transmission margin debt value reaches or exceeds the second debt threshold, continue to determine whether the continuous degradation flag of the current CPO optoelectronic interconnect digital link meets the continuous degradation judgment condition; If the continuous degradation flag meets the continuous degradation determination criteria, the debt type of the current CPO optoelectronic interconnect digital link will be determined as continuous debt. When the current transmission margin debt value reaches or exceeds the second debt threshold, but the continuous degradation flag does not meet the continuous degradation judgment condition, the debt type of the current CPO optoelectronic interconnect digital link will remain as transient debt.

5. The CPO digital link transmission protection method as described in claim 1, characterized in that, The calculation of available compensated optical power and recoverable optical power includes: Determine the set of CPO optoelectronic interconnect digital links corresponding to the same external laser source, and select the CPO optoelectronic interconnect digital links with transmission margin debt to be compensated from the set of CPO optoelectronic interconnect digital links. Read the safe output power limit, current output optical power, and temperature status of the external laser source; Based on the safe output power limit, the current output optical power, and the temperature status, determine the available compensation optical power that the external laser source can add within the current transmission quality monitoring period; Identify CPO optoelectronic interconnect digital links in the CPO optoelectronic interconnect digital link set whose effective transmission margin is higher than that of the target link; Based on the branch optical power adjustment capability identifier of the CPO optoelectronic interconnect digital link whose effective transmission margin is higher than the target link's effective transmission margin, determine the CPO optoelectronic interconnect digital links that can participate in optical power recovery. The recoverable optical power is determined based on the excess effective transmission margin of the CPO optoelectronic interconnect digital link that can participate in optical power recovery. The available compensation optical power and the recyclable optical power are combined to obtain the total compensation resources available for the CPO optoelectronic interconnect digital link to be compensated within the current transmission quality monitoring period.

6. The CPO digital link transmission protection method as described in claim 5, characterized in that, The strategies for determining link optical power compensation, modulator bias adjustment, electrical link equalization adjustment, or digital service protection include: Based on the total compensation resources and the transmission margin debt value of each CPO optoelectronic interconnect digital link to be compensated, determine the target optical power compensation amount corresponding to each CPO optoelectronic interconnect digital link to be compensated; Based on the debt type of each CPO optoelectronic interconnect digital link to be compensated, distinguish between transient debt digital links and persistent debt digital links; For transient debt digital links, determine whether each CPO optoelectronic interconnect digital link to be compensated has modulator bias adjustment capability, and determine whether to perform modulator bias adjustment based on the modulator bias deviation. For digital links with ongoing debt, determine whether each CPO optoelectronic interconnect digital link to be compensated has branch optical power adjustment capability, and perform link optical power compensation when it has branch optical power adjustment capability; For persistent debt digital links that do not have branch optical power adjustment capabilities, determine whether each CPO optoelectronic interconnect digital link to be compensated has modulator bias adjustment capability or electrical link equalization adjustment capability, and perform modulator bias adjustment or electrical link equalization adjustment accordingly. When link optical power compensation, modulator bias adjustment, and electrical link equalization adjustment cannot meet the compensation requirements, a digital service protection strategy is determined based on the transmission margin debt value and the service importance identifier.

7. The CPO digital link transmission protection method as described in claim 1, characterized in that, The transmission anomaly attribution identifiers include insufficient light supply, bias drift, insufficient electrical balance, coupling degradation, thermal disturbance, and composite anomaly.

8. The CPO digital link transmission protection method as described in claim 1 or 7, characterized in that, After implementing link optical power compensation, modulator bias adjustment, electrical link equalization adjustment, or digital service protection strategies, the effective transmission margin and optical power conversion efficiency of the link are recalculated, and a response coefficient is generated based on the actual compensation amount. The specific steps are as follows: After completing link optical power compensation, modulator bias adjustment, electrical link equalization adjustment, or digital service protection strategies, the link stabilization time is as follows: Re-collect the received optical power, input continuous wave monitoring optical power, FEC error correction event rate, service occupancy rate, and optical engine temperature of the corresponding CPO optoelectronic interconnect digital link; Based on the re-collected received optical power, FEC error correction event rate, service occupancy rate, and optical engine temperature, the compensated effective transmission margin of the link is recalculated. Based on the re-acquired received optical power and the input continuous wave monitoring optical power, the compensated optical conversion efficiency is recalculated. Based on the difference in effective transmission margin of the link before and after compensation, combined with the actual optical power compensation amount, actual offset adjustment amount or actual electrical link equalization adjustment amount, optical power compensation response coefficient, offset compensation response coefficient or electrical equalization compensation response coefficient are generated respectively. The link stabilization time refers to the time interval reserved after optical power compensation, modulator bias adjustment, or electrical link equalization adjustment is completed, allowing optical power monitoring, FEC statistics, modulator operating point, and electrical link status to reach relative stability.

9. The CPO digital link transmission protection method as described in claim 8, characterized in that, The steps for updating the transmission margin debt value and transmission anomaly attribution identifier, and feeding them back to the next transmission quality monitoring cycle, are as follows: When the following conditions are met simultaneously: the effective transmission margin of the current CPO optoelectronic interconnect digital link after compensation is not less than the target effective transmission margin of the current CPO optoelectronic interconnect digital link in the current transmission quality monitoring period, and the FEC error correction event rate of the current CPO optoelectronic interconnect digital link after compensation is not higher than the target FEC error correction event rate of the current CPO optoelectronic interconnect digital link in the current transmission quality monitoring period, the transmission quality of the current CPO optoelectronic interconnect digital link is deemed to have been effectively restored in the current transmission quality monitoring period. When it is determined that the transmission quality of the current CPO optoelectronic interconnect digital link has been effectively restored within the current transmission quality monitoring period, the transmission margin debt value of the corresponding CPO optoelectronic interconnect digital link is reduced according to the margin excess state where the effective transmission margin of the compensated link is higher than the effective transmission margin of the target link, and the effective transmission quality state of the current CPO optoelectronic interconnect digital link is recorded. When the optical power compensation response coefficient, bias compensation response coefficient, or electrical equalization compensation response coefficient is lower than the corresponding response threshold, a transmission anomaly attribution identifier is generated based on the changes in optical power conversion efficiency, optical engine temperature changes, and actual compensation type. Adjust the priority of the link optical power compensation, modulator bias adjustment, electrical link equalization adjustment, or digital service protection strategy for the corresponding CPO optoelectronic interconnect digital link in the next transmission quality monitoring cycle based on the transmission anomaly attribution identifier. The updated transmission margin debt value, transmission anomaly attribution identifier, and adjusted priority will be fed back to the next transmission quality monitoring cycle.

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