CN111416665B

CN111416665B - Optical fiber communication method, device, equipment and storage medium

Info

Publication number: CN111416665B
Application number: CN201910013562.2A
Authority: CN
Inventors: 王东; 李允博; 张德朝; 赵阳; 王磊; 李晗
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2019-01-07
Filing date: 2019-01-07
Publication date: 2022-04-15
Anticipated expiration: 2039-01-07
Also published as: CN111416665A

Abstract

The embodiment of the application discloses an optical fiber communication method, an optical fiber communication device, an optical fiber communication equipment and a storage medium, which are applied to an OTN/WDM system, wherein the OTN/WDM system comprises a processing node, at least two optical fiber communication nodes and a power adjusting node; the method comprises the following steps: the processing node acquires state parameters of an optical channel between the at least two optical fiber communication nodes; determining the adjustment quantity of the state parameter according to the state parameter and a preset performance parameter; and sending the adjustment amount to the power adjustment node so that the power adjustment node adjusts the state parameter.

Description

Optical fiber communication method, device, equipment and storage medium

Technical Field

The embodiment of the application relates to the technical field of communication, and relates to but is not limited to an optical fiber communication method, an optical fiber communication device, optical fiber communication equipment and a storage medium.

Background

Large capacity, long haul is an important evolving direction for optical transmission systems. At present, an Optical Transport Network (OTN) system or a Wavelength Division Multiplexing (WDM) system generally adopts a coherent Optical communication technology, wherein Optical fiber loss is a main factor that limits an electroless relay transmission distance in the coherent Optical communication technology. To compensate for the fiber loss, an Optical Amplifier (OA) is placed across each fiber span to compensate for the fiber span loss.

Currently, a common method for compensating for span loss is to monitor the optical power of each optical fiber span through an optical power monitoring unit, and feed back the monitoring result to a power adjustment node such as a gain flattening filter or an adjustable attenuation combiner or an optical amplifier, so that the power adjustment node adjusts the optical power of the optical fiber span.

However, the Optical power is adjusted by directly controlling the power adjusting node only by monitoring the Optical power, and each stage of power equalization causes Optical power loss, which results in deterioration of the Optical Signal to Noise Ratio (OSNR) of the system and degradation of transmission performance. Moreover, the distributed management and the distributed calculation of each optical fiber communication node or optical fiber span lack the overall calculation and adjustment; and if all optical fiber communication nodes or optical fiber spans are managed and calculated in a centralized manner, the problems of high complexity and difficulty in convergence are faced.

Disclosure of Invention

In view of this, embodiments of the present application provide an optical fiber communication method, apparatus, device, and storage medium.

The technical scheme of the embodiment of the application is realized as follows:

in a first aspect, an embodiment of the present application provides an optical fiber communication method, which is applied to an OTN/WDM system, where the OTN/WDM system includes a processing node, at least two optical fiber communication nodes, and a power adjustment node; the method comprises the following steps: the processing node acquires state parameters of an optical channel between the at least two optical fiber communication nodes; determining the adjustment quantity of the state parameter according to the state parameter and a preset performance parameter; and sending the adjustment amount to the power adjustment node so that the power adjustment node adjusts the state parameter.

In a second aspect, an embodiment of the present application provides a fiber optic communication device, including: an obtaining unit, configured to obtain a state parameter of an optical channel between the at least two optical fiber communication nodes; the determining unit is used for determining the adjustment quantity of the state parameter according to the state parameter and a preset performance parameter; a sending unit, configured to send the adjustment amount to the power adjustment node, so that the power adjustment node adjusts the state parameter.

In a third aspect, an embodiment of the present application provides an optical fiber communication apparatus, where the apparatus at least includes: a processor and a storage medium configured to store executable instructions, wherein: the processor is configured to execute stored executable instructions; the executable instructions are configured to perform the fiber optic communication method described above.

In a fourth aspect, embodiments of the present application provide a storage medium having stored therein computer-executable instructions configured to execute the above-mentioned optical fiber communication method.

In the embodiment of the present application, since the processing node determines the adjustment amount according to the state parameter and the preset performance parameter, and makes the power adjustment node perform the state parameter adjustment based on the adjustment amount, the OSNR degradation of the system can be avoided, and the transmission performance of the system is ensured. In addition, the system is integrally controlled by the processing node, so that unified management and centralized calculation of the optical fiber communication nodes or the optical fiber spans are realized.

Drawings

In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar components in different views. Like reference numerals having different letter suffixes may represent different examples of similar components. The drawings illustrate generally, by way of example, but not by way of limitation, various embodiments discussed herein.

FIG. 1 is a schematic structural diagram of an OTN/WDM system provided by an embodiment of the present application;

fig. 2 is a schematic flow chart illustrating an implementation of a fiber optic communication method according to an embodiment of the present application;

fig. 3 is a schematic flow chart illustrating an implementation of a fiber optic communication method according to a second embodiment of the present application;

fig. 4 is a schematic flow chart illustrating an implementation of an optical fiber communication method according to a third embodiment of the present application;

fig. 5 is a schematic flow chart illustrating an implementation of a fiber optic communication method according to a fourth embodiment of the present application;

fig. 6 is a schematic flow chart illustrating an implementation of a fiber optic communication method according to a fifth embodiment of the present application;

fig. 7 is a schematic flow chart illustrating an implementation of a fiber optic communication method according to a sixth embodiment of the present application;

fig. 8 is a schematic flow chart illustrating an implementation of a fiber optic communication method according to a seventh embodiment of the present application;

fig. 9 is a schematic structural diagram of an optical fiber communication system according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a controller provided in an embodiment of the present application;

fig. 11 is a schematic flow chart illustrating an implementation of a fiber optic communication method according to an embodiment of the present application;

FIG. 12 is a flowchart of an iterative algorithm provided by an embodiment of the present application;

fig. 13 is a schematic structural diagram of an optical fiber communication apparatus according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of an optical fiber communication device according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, specific technical solutions of the present application will be described in further detail below with reference to the accompanying drawings in the embodiments of the present application. The following examples are intended to illustrate the present application but are not intended to limit the scope of the present application.

OTN/WDM systems typically employ dense wavelength division techniques and therefore can support 80-wave co-fiber transmission. Because the optical fiber attenuation spectrum is uneven and the optical amplifier gain spectrum is uneven, the flatness of the spectral power of a multi-wavelength signal is reduced after the multi-wavelength signal is transmitted through the optical fiber and amplified by the optical amplifier, and the reduction of the flatness of the spectral power is increasingly degraded along with the increase of the transmission distance, so that the power of signals with different wavelengths at a receiving end and the corresponding OSNR have obvious difference. In addition, for the multi-span system, due to the influence of the nonlinear effect, the performance of the signals with different powers and different wavelengths at the receiving end after transmission and amplification also has a certain difference. Therefore, it is necessary to equalize the optical power of the optical transmission system so that the optical power and OSNR of the signals with different wavelengths are close. In addition, in the communication standard, it is also required that the optical transmission system dynamically adjusts the optical power of each path under the conditions of optical fiber attenuation change, optical path cutover, changes in optical parameters of intermediate stations and receiving performance of each path, and the like, so as to optimize the optical power and OSNR of each path, thereby optimizing the overall performance of the system, and meanwhile, the power dynamic control process cannot affect the normal operation of the adjusted path and the online services of other paths.

Currently, an optical power monitoring unit is usually used to monitor the optical power and feed back the detected optical power to an adjustable gain flattening filter or an adjustable attenuation combiner. In the related technology, an adjustable attenuation combiner is connected with a power amplifier at a signal transmitting end to pre-balance the optical power of each light source, and the optical power is balanced by a gain flattening filter balancing unit. In a multi-stage transmission link, a gain flattening filter is used to form a gain flattening filter equalization unit. And then, the optical power equalization is carried out through the equalizing unit of the adjustable attenuation combiner, and the equalizing unit of the adjustable attenuation combiner is internally connected with a power amplifier and a monitoring feedback device, so that the output signal data can be sampled, analyzed and processed, and the optical power attenuation of each optical channel can be automatically adjusted. Therefore, the improvement of the optical power flatness is easy to realize, the method is simple, but each stage of power equalization causes the loss of the optical power, the OSNR of the system is deteriorated, and the transmission performance is reduced.

Furthermore, each fiber optic communication node or span is used as a management and optimization unit in the related art. I.e. adjusting upstream node or span parameters, downstream node or span parameters are not changed. This allows a relatively fast adjustment speed. However, each node or span is in decentralized management, lacks overall calculation and adjustment, and is only local optimization. If all nodes or spans are managed and calculated in a centralized manner, the problems of high complexity and difficulty in convergence are faced.

Furthermore, with the emergence of new demands and the falling of new technologies, the control parameters in OTN/WDM systems are further increasing. For example, the application of optical cross-connects urgently needs to increase the transmission distance of the electroless relay, resulting in a corresponding increase in the number of optical channel power equalization units and OAs. Therefore, global optimization and rapid convergence under the condition of realizing numerous control parameters are problems to be solved urgently.

Based on the above problems in the related art, embodiments of the present application provide an optical fiber communication method, which can avoid the deterioration of the OSNR of the system and ensure the transmission performance of the system. And moreover, unified management and centralized calculation of optical fiber communication nodes or optical fiber spans can be realized.

Before explaining the optical fiber communication method of the present embodiment, an OTN/WDM system according to the present embodiment is first described, as shown in fig. 1, and includes: a processing node 11, at least two fiber optic communication nodes (e.g., including a first fiber optic communication node 121 and a second fiber optic communication node 122), and a power adjustment node 13.

The processing node 11 is a general control node of the OTN/WDM system, and is respectively connected to the at least two optical fiber communication nodes 121 and 122 and the power adjustment node 13, and is configured to perform overall control on the OTN/WDM system. For example, the processing node 11 may be a system server or a management server, through which control of other nodes in the OTN/WDM system is implemented.

The at least two optical fiber communication nodes are used for realizing an optical fiber communication process. In this embodiment, the at least two optical fiber communication nodes may be any optical fiber communication nodes, for example, the first optical fiber communication node 121 may be an optical transmitter, and the second optical fiber communication node 122 may be an optical receiver. And the optical transmitter is connected with the optical receiver to form an optical channel, and the optical fiber communication process is realized through the optical channel.

The power adjusting node 13 is located between the first optical fiber communication node 121 and the second optical fiber communication node 122, and is configured to adjust a state parameter of an optical channel between the first optical fiber communication node 121 and the second optical fiber communication node 122. The power adjustment node 13 comprises at least one of: the optical amplifier comprises an adjustable attenuation combiner, an optical channel power equalizer and an optical amplifier, wherein the adjustable attenuation combiner and the optical channel power equalizer can reduce the state parameters of the optical channel, and the optical amplifier can increase the state parameters of the optical channel.

Fig. 2 is a schematic flow chart of an implementation of an optical fiber communication method according to an embodiment of the present application, as shown in fig. 2, the method includes the following steps:

step S201, the processing node obtains a status parameter of an optical channel between at least two optical fiber communication nodes.

Here, the processing node may be a server, and the processing node is configured to control the OTN/WDM system to adjust a state parameter of an optical channel in the system.

Each of the at least two optical fiber communication nodes has an optical power value, and the at least two optical fiber communication nodes include an optical transmitter and an optical receiver.

In the optical fiber communication process, the state parameter of the optical channel comprises at least one of the following: optical channel power, gain power, and line power.

Wherein, the optical channel power can be determined by an optical fiber communication unit formed by an optical transmitter and an optical receiver. For example, in the optical fiber communication process, an optical channel is formed between the optical transmitter and the optical receiver, and the optical channel power of the optical channel can be obtained according to the transmission power and the reception power by acquiring the transmission power of the optical transmitter and the reception power of the optical receiver.

The gain power is a gain power parameter of at least one optical amplifier connected between the optical transmitter and the optical receiver in the optical fiber communication process. In this embodiment, each optical amplifier corresponds to an optical amplifier gain power, and the optical amplifier gain power of each optical amplifier may be a fixed value or a variable value. For example, the gain power of the optical amplifier may be a rated gain power of the corresponding optical amplifier, and the rated gain power may be a fixed value, or may be adjusted accordingly according to actual needs.

The line power may be derived from all or a portion of the optical channel power. When obtaining the line power, it is first necessary to determine the optical channel power of each optical channel in all or part of the optical channels in the system, and then determine the line power according to the optical channel power of all or part of the optical channels. For example, the line power is taken as the average value of the optical channel powers of all the optical channels, or the line power is taken as the average value of the optical channel powers of a specific part of the optical channels. In this embodiment, the specific part of the optical channels may be selected according to actual needs or preset conditions.

In other embodiments, the status parameter of the optical channel may further include a transmission code stream between the optical transmitter and the optical receiver, so that the pre-correction bit error rate of the corresponding optical channel may be determined by the transmission code stream.

Step S202, the processing node determines the adjustment amount of the state parameter according to the state parameter and the preset performance parameter.

Here, the preset performance parameter includes at least one of: a preset OSNR value and a preset pre-correction error rate. Since the state parameter of the optical channel comprises at least one of: the power of the optical channel, the gain power and the line power, or the state parameters of the optical channel may further include a transmission code stream between the optical transmitter and the optical receiver. Thus, prior to determining the adjustment amount, the method further comprises:

step S2021, calculating an OSNR value and/or a pre-correction bit error rate of each optical channel according to the state parameter of the optical channel. Here, at least one of the following may be used: calculating an OSNR value by using the optical channel power, the gain power of the optical amplifier and the line power; and/or, the error rate before correction of the corresponding optical channel can be calculated according to the transmission code streams of the optical transmitter and the optical receiver.

When the OSNR value is calculated, first, the noise power of the optical channel in the current environment is obtained, and then the OSNR value is determined according to the optical channel power or the gain power of the optical amplifier or the ratio between the line power and the noise power. It should be noted that the optical channel power or the gain power or the line power of the optical amplifier may take a peak value, that is, the optical channel power or the gain power or the line power of the optical amplifier may take a difference between a highest value and a lowest value of a signal in one period; the noise power may be taken as the power level of the middle point of two adjacent optical channels.

When the error rate before correction is calculated, firstly determining the number of error codes of a transmission code stream, then determining the total number of the transmission code stream, and finally taking the percentage value of the number of the error codes to the total number of the code stream as the error rate before correction.

Here, the error is generated because in signal transmission, the voltage of the signal is changed by decay, so that the signal is damaged in transmission, and an error is generated, for example, if the transmitted signal is 1 and the received signal is 0, the signal can be regarded as an error. Errors can be caused by noise, pulses from ac or lightning, transmission equipment failure, and other factors. In this embodiment, a signal of a transmission code stream transmitted in an optical channel may be analyzed to obtain the error code and the corresponding number of error codes, and then calculate the pre-correction error rate.

Step S2022, determining whether to adjust the state parameter of the corresponding optical channel according to the OSNR value and/or the pre-correction bit error rate.

Here, the OSNR value and/or the pre-correction error rate may be compared with the preset performance parameter, if a preset condition is satisfied between the OSNR value and/or the pre-correction error rate and the preset performance parameter, the state parameter of the corresponding optical channel is not adjusted, and if a preset condition is not satisfied between the OSNR value and/or the pre-correction error rate and the preset performance parameter, the state parameter of the corresponding optical channel is adjusted.

When it is determined according to step S2022 that the state parameter of the corresponding optical channel needs to be adjusted, step S202 is performed to determine the adjustment amount. The adjustment amount is used to adjust the state parameter, and the adjustment amount is a power parameter, so that during adjustment, one of the optical channel power in the optical channel, the gain power of the optical amplifier, and the line power can be adjusted according to the adjustment amount.

Step S203, the processing node sends the adjustment amount to the power adjustment node, so that the power adjustment node adjusts the state parameter.

Here, after the power adjusting node receives the adjustment amount sent by the processing node, the power adjusting node starts to adjust the state parameter according to the adjustment amount under the driving of the processing node, so as to compensate the optical fiber loss, and realize normal and effective performance of optical fiber communication.

In an embodiment of the present application, the power adjustment node includes at least one of: the device comprises an adjustable attenuation wave combiner, an optical channel power equalizer and an optical amplifier; the adjustment amount includes a down amount and an up amount. Correspondingly, step S203 may be implemented by:

step S2031, if the adjustment quantity is less than 0, determining the adjustment quantity as a down-regulation quantity, and sending the down-regulation quantity to an adjustable attenuation combiner and/or an optical channel power equalizer, so that the adjustable attenuation combiner and/or the optical channel power equalizer reduce the state parameter according to the down-regulation quantity.

Step S2032, if the adjustment amount is greater than 0, determining that the adjustment amount is an up-adjustment amount, and sending the up-adjustment amount to the optical amplifier, so that the optical amplifier increases the state parameter according to the up-adjustment amount.

According to the optical fiber communication method provided by the embodiment of the application, the processing node acquires the state parameters of the optical channel between at least two optical fiber communication nodes; determining the adjustment quantity of the state parameter according to the state parameter and the preset performance parameter; and sending the adjustment amount to the power adjustment node so that the power adjustment node adjusts the state parameters. In this way, the processing node determines the adjustment amount according to the state parameter and the preset performance parameter, and the power adjustment node adjusts the state parameter based on the adjustment amount, so that the deterioration of the system OSNR can be avoided, and the transmission performance of the system can be ensured. In addition, the system is integrally controlled by the processing node, so that unified management and centralized calculation of the optical fiber communication nodes or the optical fiber spans are realized.

Fig. 3 is a schematic implementation flowchart of a fiber optic communication method according to a second embodiment of the present application, and as shown in fig. 3, the method includes the following steps:

step S301, the processing node obtains a status parameter of an optical channel between at least two optical fiber communication units.

Here, each of the at least two optical fiber communication nodes has an optical power value, and the at least two optical fiber communication nodes include an optical transmitter and an optical receiver. The optical transmitter and the optical receiver form an optical fiber communication unit, each optical fiber communication unit is provided with an optical channel, and each optical channel corresponds to a state parameter in the optical fiber communication process. In this embodiment, since the OTN/WDM system has at least two optical fiber communication nodes, if the OTN/WDM system has at least one optical channel, at least one status parameter corresponds to the optical channel.

Step S302, the processing node forms an iteration initial value according to the state parameters and the number of the state parameters.

Here, the number of the state parameters is N, and N is 1 or more. The value of N is related to the number of optical channels, N being equal to the number of optical channels.

In this embodiment, when the number of the state parameters is N, a vector with a mean value of 0 and a variance of δ N may be formed according to the N state parameters. In subsequent iterative calculations, the N-dimensional vector may be iterated as an iteration initial value of the iterative calculation, that is, as a parent vector, to form a new child vector.

Step S303, the processing node inputs the iteration initial value and the preset OSNR value to a preset iteration formula, and performs iterative operation. Here, the preset OSNR value is a preset performance parameter; the preset performance parameter may further include a preset pre-correction bit error rate. Then, step S303 can also be implemented by:

step S3031, inputting the iteration initial value, the preset OSNR value, and the preset pre-correction bit error rate to a preset iteration formula, and performing iterative operation.

In this embodiment, the processing node may input the iteration initial value, the preset OSNR value, and/or the preset pre-correction bit error rate to a preset iteration formula to perform iterative operation.

Since the state parameter of the optical channel comprises at least one of: the power of the optical channel, the gain power of the optical amplifier, and the line power, and/or the state parameters of the optical channel may further include a transmission code stream of the optical transmitter and the optical receiver. Thus, the iteration initial value may be at least one of: an N-dimensional vector associated with the OSNR value and an N-dimensional vector associated with the pre-correction error rate.

The N-dimensional vector related to the OSNR values is calculated to obtain corresponding N OSNR values according to a ratio of optical channel power in state parameters of the N optical channels to noise power of the optical channels in the current environment. Then forming the N-dimensional vector related to the OSNR value according to the N OSNR values, or calculating to obtain the corresponding N OSNR values according to the ratio of the gain power of the optical amplifier in the state parameters of the N optical channels to the noise power of the optical channel under the current environment, and then forming the N-dimensional vector related to the OSNR value according to the N OSNR values; or, calculating to obtain N corresponding OSNR values according to a ratio of line power in the state parameters of the N optical channels to noise power of the optical channel in the current environment, and then forming the N-dimensional vector related to the OSNR values according to the N OSNR values.

The N-dimensional vector related to the pre-correction error rate is that the corresponding N pre-correction error rates are determined according to the percentage value of the number of errors of the transmission code stream between the optical transmitter and the optical receiver in the state parameters of the N optical channels and the total number of the transmission code stream, and then the N-dimensional vector related to the pre-correction error rates is formed according to the N pre-correction error rates.

Since the iteration initial value may be at least one of: an N-dimensional vector associated with the OSNR value and an N-dimensional vector associated with the pre-correction error rate. Therefore, in this embodiment, the iterative operation performed in step S303 includes the following three implementation manners:

the first method is as follows: when the iteration initial value is an N-dimensional vector related to an OSNR value, the preset performance parameter is a preset OSNR value, and at this time, iterative operation may be performed by inputting the N-dimensional vector related to the OSNR value and the preset OSNR value to the preset iteration formula.

The second method comprises the following steps: when the iteration initial value is an N-dimensional vector related to the pre-correction error rate, and the preset performance parameter is a preset pre-correction error rate, at this time, iterative operation may be performed by inputting the N-dimensional vector related to the pre-correction error rate and the preset pre-correction error rate into the preset iteration formula.

The third method comprises the following steps: when the iteration initial value is an N-dimensional vector related to the OSNR value and an N-dimensional vector related to the pre-correction error rate, the preset performance parameter is a preset OSNR value and a preset pre-correction error rate, and at this time, the iteration operation may be performed by inputting the N-dimensional vector related to the OSNR value, the N-dimensional vector related to the pre-correction error rate, the preset OSNR value, and the preset pre-correction error rate to the preset iteration formula at the same time.

In this embodiment, the iterative formula may be any one of the iterative formulas, and the iterative operation performed by the iterative formula may be: and inputting an iteration initial value as a parent vector, a preset OSNR value and/or a preset pre-correction error rate into a preset iteration formula, performing iterative operation to obtain a first offspring vector, if the first offspring vector does not meet a preset requirement, inputting the first offspring vector as the parent vector of the next iterative operation, and the first offspring vector and the preset OSNR value and/or the preset pre-correction error rate into the preset iteration formula again at the same time, performing iterative operation to obtain a second offspring vector, if the second offspring vector meets the preset requirement, ending the iterative operation process, and taking the second offspring vector as the iterative operation result of the iterative operation.

It should be noted that in this embodiment, M times of iterative operations may be performed until the child vectors obtained by the iterative operations meet the preset requirement, where M is greater than or equal to 1.

In step S304, the processing node determines an iterative operation result obtained through the iterative operation as the adjustment amount of the state parameter. Here, after the iterative operation is performed, the iterative operation result is determined as an adjustment amount, which is a parameter value that satisfies the preset requirement.

Step S305, the processing node sends the adjustment amount to the power adjustment node, so that the power adjustment node adjusts the state parameter.

In this embodiment, the power adjustment node includes at least one of: the device comprises an adjustable attenuation wave combiner, an optical channel power equalizer and an optical amplifier; the adjustment amount includes a down-regulation parameter and an up-regulation parameter. Thus, step S305 may be implemented by:

step S3051, when the adjustment quantity is a down-adjustment parameter, the processing unit sends the down-adjustment parameter to the adjustable attenuation combiner and/or the optical channel power equalizer, so that the adjustable attenuation combiner and/or the optical channel power equalizer reduce the state parameter according to the down-adjustment parameter.

Here, when the adjustment amount is the down-regulation parameter, the adjustment amount may be a negative value, and then the processing unit may send the negative value to the adjustable attenuation combiner and/or the optical channel power equalizer; and the adjustable attenuation combiner and/or the optical channel power equalizer adjust the state parameter according to the negative value, and reduce the value of the state parameter.

And step S3052, when the adjustment quantity is the up-regulation parameter, the processing unit sends the up-regulation parameter to the optical amplifier, so that the optical amplifier increases the state parameter according to the up-regulation parameter.

Here, when the adjustment amount is the up-adjustment parameter, the adjustment amount may be a positive value, and then the processing unit may transmit the positive value to the optical amplifier; the optical amplifier adjusts the state parameter according to the positive value, and increases the value of the state parameter.

The optical fiber communication method provided by the embodiment of the application obtains the child vectors meeting the preset requirements through iterative operation, and the child vectors are used as the adjustment quantity to realize that the power adjustment unit adjusts the state parameters according to the adjustment quantity. Therefore, the state parameters can be accurately and effectively adjusted, and large errors are prevented from being generated during parameter adjustment. In addition, the adjustment amount is determined according to the OSNR value and/or the error rate before correction, so that the deterioration of the OSNR of the system can be avoided, and the transmission performance of the system is ensured.

Fig. 4 is a schematic implementation flow diagram of an optical fiber communication method according to a third embodiment of the present application, and as shown in fig. 4, the method includes the following steps:

step S401, the processing node obtains a status parameter of an optical channel between at least two optical fiber communication nodes.

It should be noted that step S401 is the same as step S301, and the description of this embodiment is omitted.

In step S402, the processing node determines the OSNR value of each optical channel according to the corresponding state parameter of each optical channel.

Here, the state parameter includes at least one of: optical channel power, gain power of the optical amplifier, and noise power of the optical channel. The OSNR value of the optical channel can be obtained by the following two ways:

the first method is as follows: and determining the OSNR value of the optical channel according to the ratio of the optical channel power to the noise power of the optical channel. The second method comprises the following steps: and determining the OSNR value of the optical channel according to the ratio of the gain power to the noise power of the optical channel.

In step S403, a first difference between the OSNR value of each optical channel and a preset OSNR value is determined.

In other embodiments, there are N optical channels between the at least two optical fiber communication nodes, and each optical channel corresponds to one status parameter; correspondingly, the method further comprises:

in step S4031, the processing node determines the OSNR value and the pre-correction error rate of the corresponding optical channel according to the state parameter corresponding to each optical channel.

Step S4032, determine a first difference between the OSNR value of each optical channel and a preset OSNR value; step S4033, a second difference between the pre-correction error rate of each optical channel and the preset pre-correction error rate is determined.

Step S404, if the absolute value of at least one first difference is greater than or equal to a first preset threshold, forming an iteration initial value according to the state parameters and the number of the state parameters.

Here, the iteration initial value is used for being input to the iteration formula for the first time during the iterative operation, so as to start the iterative operation. In this embodiment, if the absolute value of at least one first difference is greater than or equal to the first preset threshold, it indicates that the current optical channel has an optical fiber loss or the power of the optical channel is abnormal or attenuated, and therefore, the power of the optical channel needs to be adjusted. The first preset threshold may be determined according to the optical fiber communication requirement, which is not limited in this embodiment.

In other embodiments, the method further comprises:

step S4041, if the absolute value of at least one first difference is greater than or equal to a first preset threshold, or if the absolute value of at least one second difference is greater than or equal to a second preset threshold, forming an iteration initial value according to the state parameters and the number of the state parameters.

Here, if the absolute value of at least one first difference is greater than or equal to a first preset threshold, or if the absolute value of at least one second difference is greater than or equal to a second preset threshold, it indicates that the current optical channel has optical fiber loss or optical channel power is abnormal or attenuated, and therefore, the power of the optical channel needs to be adjusted. The first preset threshold and the second preset threshold can be determined according to optical fiber communication requirements.

Step S405, the processing node inputs the iteration initial value and the preset OSNR value into a preset iteration formula to perform iterative operation.

Step S406, the processing node determines an iterative operation result obtained through the iterative operation as the adjustment amount of the state parameter.

Step S407, the processing node sends the adjustment amount to the power adjustment node, so that the power adjustment node adjusts the state parameter.

It should be noted that steps S405 to S407 are the same as steps S303 to S305, and this embodiment is not repeated. In the optical fiber communication method provided by the embodiment of the application, if the absolute value of at least one first difference is greater than or equal to a first preset threshold, and/or if the absolute value of at least one second difference is greater than or equal to a second preset threshold, an iteration initial value is formed, and an iteration formula is started to perform iterative operation through the iteration initial value to obtain the adjustment quantity, so that the state parameter of the optical channel is adjusted. Therefore, the adjustment of the state parameters of the optical channel can be realized according to the relation between the OSNR value of the optical channel and the preset OSNR value, the deterioration of the OSNR of the system can be avoided, and the transmission performance of the system is ensured.

Fig. 5 is a schematic implementation flowchart of a fiber optic communication method according to a fourth embodiment of the present application, and as shown in fig. 5, the method includes the following steps:

step S501, the processing node obtains a status parameter of an optical channel between at least two optical fiber communication nodes.

Here, the state parameter includes a noise power and an optical channel power of the optical channel; correspondingly, the preset performance parameter comprises a preset OSNR value.

In this embodiment, the step S501 of acquiring, by the processing node, the state parameter of the optical channel includes: and the processing node acquires the noise power of the optical channel and the processing node acquires the power of the optical channel.

The process of acquiring the noise power of the optical channel by the processing node can be realized by the following steps:

in step S5011, the processing node determines another optical channel adjacent to the optical channel, and forms a connection channel with the another optical channel through the optical channel.

Step S5012, determining a power value of the optical fiber communication node located in the middle of the connection channel as the noise power.

Here, the noise power is determined by a power value of an optical fiber communication node located at a middle position of the connection channel, that is, a power level of a middle point of two adjacent optical channels is determined as the noise power.

The process of acquiring the optical channel power by the processing node can be realized by the following steps:

step S5013, the processing node obtains a power value of each optical fiber communication node in two optical fiber communication nodes corresponding to the optical channel.

Here, when a certain optical fiber communication node is an optical transmitter, the power value is transmission power; when a certain optical fiber communication node is an optical receiver, the power value is the received power.

Step S5014, determining an average value of the two power values corresponding to the two optical fiber communication nodes as the optical channel power.

For example, if a certain optical channel L includes an optical transmitter K1 and an optical receiver K2, where the transmission power of K1 is P1, and the reception power of K2 is P2, then P3 can be the optical channel power of the optical channel L by calculating the average value P3 of P1 and P2.

Step S502, determining an OSNR value of the optical channel according to a ratio between the optical channel power and the noise power of the optical channel.

Here, the ratio of the optical channel power to the noise power of the optical channel is calculated, and the ratio is determined as the OSNR value of the optical channel.

In step S503, a third difference between the OSNR value of the optical channel and a preset OSNR value is determined.

Step S504 determines a product of the third difference and the noise power of the optical channel as a first adjustment amount.

Here, the first adjustment amount is an adjustment amount of the optical channel power.

Step S505, the processing node sends the first adjustment amount to the power adjustment node, so that the power adjustment node adjusts the state parameter.

It should be noted that step S505 is the same as step S407, and the description of this embodiment is omitted.

According to the optical fiber communication method provided by the embodiment of the application, the optical channel power of the optical channel is calculated, and then the OSNR value of the optical channel is calculated according to the optical channel power, so that the state parameter of the optical channel is adjusted according to the relation between the OSNR value and the preset OSNR value, the deterioration of the OSNR of the system can be avoided, and the transmission performance of the system is ensured.

Fig. 6 is a schematic implementation flow diagram of an optical fiber communication method provided in the fifth embodiment of the present application, and as shown in fig. 6, the method includes the following steps:

step S601, the processing node acquires a status parameter of an optical channel between at least two optical fiber communication nodes.

Here, the state parameters include noise power and gain power of the optical channel; wherein the gain power is a gain power of an optical amplifier in the optical channel. Correspondingly, the preset performance parameter includes the preset OSNR value.

In this embodiment, the step S601 of acquiring the state parameter of the optical channel by the processing node includes: and the processing node acquires the noise power of the optical channel and the processing node acquires the gain power.

step S6011, the processing node determines another optical channel adjacent to the optical channel, and forms a connection channel with the another optical channel through the optical channel.

Step S6012, determining a power value of the optical fiber communication node located in the middle of the connection channel as the noise power.

It should be noted that steps S6011 to S6012 are the same as steps S5011 to S5012, and are not described again in this embodiment.

The process of acquiring gain power for the processing node can be realized by the following steps:

step S6013, the processing node determines the output power of the optical amplifier according to the product of the amplification factor of the optical amplifier and the input power of the optical amplifier.

It should be noted that, if there are multiple optical amplifiers in an optical channel, the output power of the corresponding optical amplifier is determined according to the product of the amplification factor of each optical amplifier and the input power of the corresponding optical amplifier.

Step S6014, determining a difference between the output power and the input power as the gain power.

For example, if an optical channel L1 includes an optical amplifier a, where the output power of a is P4 and the input power is P5, then the difference P6 between P4 and P5 can be calculated, and then P6 is the gain power of the optical amplifier a.

It should be noted that, if a plurality of optical amplifiers are included in one optical channel, the gain power of the corresponding optical amplifier is determined according to the difference between the output power and the input power of each optical amplifier. Correspondingly, the method further comprises:

step S6015, determining a sum of gain powers corresponding to the plurality of optical amplifiers according to the gain power of each of the plurality of optical amplifiers, and determining the sum of the gain powers as a total gain power.

For example, one optical channel L2 includes two optical amplifiers a1 and a2, where the output power of a1 is P7 and the input power is P8; the output power of A2 is P9, and the input power is P10. Then, by calculating the difference P11 between P7 and P8 and the difference P12 between P9 and P10, P11 is the gain power of the optical amplifier a1 and P12 is the gain power of the optical amplifier a 2. And, calculating the sum P13 of P11 and P12, then P13 is the total power of the gain.

Step S602, determining an OSNR value of the optical channel according to a ratio between the gain power and the noise power of the optical channel.

It should be noted that, if an optical amplifier is included in the optical channel, the gain power in step S602 is the gain power calculated according to step S6014; if a plurality of optical amplifiers are included in the optical channel, the gain power in step S602 is the total gain power calculated according to step S6015.

In step S603, a fourth difference between the OSNR value of the optical channel and a preset OSNR value is determined.

Step S604 determines the product of the fourth difference and the noise power of the optical channel as a second adjustment amount.

Here, the second adjustment amount is an adjustment amount of the gain power.

Step S605, the processing node sends the second adjustment amount to the power adjustment node, so that the power adjustment node adjusts the state parameter.

It should be noted that step S605 is the same as step S505, and the description of this embodiment is omitted.

According to the optical fiber communication method provided by the embodiment of the application, the OSNR value of the optical channel is obtained through calculation according to the gain power by calculating the gain power of the optical channel, so that the state parameter of the optical channel is adjusted according to the relation between the OSNR value of the optical channel and the preset OSNR value, the deterioration of the OSNR of a system can be avoided, and the transmission performance of the system is ensured.

Fig. 7 is a schematic implementation flowchart of a fiber optic communication method according to a sixth embodiment of the present application, and as shown in fig. 7, the method includes the following steps:

step S701, the processing node obtains a state parameter of an optical channel between at least two optical fiber communication nodes.

Here, the status parameters include line power corresponding to all optical channels or line power corresponding to a part of optical channels, and noise power of each optical channel. Correspondingly, the preset performance parameter comprises a preset OSNR value.

In this embodiment, the step S701 of acquiring, by the processing node, the state parameter of the optical channel includes: and the processing node acquires the optical channel power and the processing node acquires the line power.

step S7011, the processing node obtains a power value of each optical fiber communication node in two optical fiber communication nodes corresponding to the optical channel.

Step S7012, determining an average value of two power values corresponding to the two optical fiber communication nodes as the optical channel power.

The process of acquiring the line power by the processing node can be realized by the following steps:

step S7013, determining an optical channel power average value of all or part of the optical channels according to the optical channel power of each optical channel in all or part of the optical channels.

Here, when the line power is the line power of all the optical channels, calculating an average value of the optical channel powers corresponding to all the optical channels as an optical channel power average value through the optical channel power of each optical channel; when the line power is the line power of the partial optical channels, the average value of the optical channel powers corresponding to the partial optical channels is calculated as the optical channel power average value through the optical channel power of each optical channel in the partial optical channels.

Step S7014, determining the average value of the optical channel power as the line power.

Step S702, determining a noise power average value of all or part of the optical channels according to the noise power of each optical channel in all or part of the optical channels.

Here, when the line power is the line power of all the optical channels, calculating an average value of the noise powers corresponding to all the optical channels as a noise power average value by using the noise power of each optical channel in all the optical channels; when the line power is the line power of the partial optical channels, calculating the average value of the noise power corresponding to each optical channel in the partial optical channels as the noise power average value through the noise power of each optical channel in the partial optical channels.

Step S703 determines the OSNR value of all or part of the optical channels according to the ratio between the line power and the noise power average value.

Step S704, determining a fifth difference between the OSNR value of all or part of the optical channels and the preset OSNR value.

In step S705, the product of the fifth difference and the noise power average is determined as the third adjustment amount.

Here, the third adjustment amount is an adjustment amount of the line power.

Step S706, the processing node sends the third adjustment amount to the power adjustment node, so that the power adjustment node adjusts the state parameter.

It should be noted that step S706 is the same as step S505, and the description of this embodiment is omitted.

According to the optical fiber communication method provided by the embodiment of the application, the line power of the optical channel is calculated, and then the OSNR value of the optical channel is calculated according to the line power, so that the state parameter of the optical channel is adjusted according to the relation between the OSNR value of the optical channel and the preset OSNR value, the deterioration of the OSNR of a system can be avoided, and the transmission performance of the system is ensured.

Fig. 8 is a schematic implementation flowchart of a fiber optic communication method according to a seventh embodiment of the present application, and as shown in fig. 8, the method includes the following steps:

step S801, the processing node acquires a status parameter of an optical channel between at least two optical fiber communication nodes.

Step S802, the processing node matches a preset template parameter with a preset similarity with the state parameter in a preset template parameter set.

Here, in the matching process, a similarity between the state parameter and each preset template parameter in the preset template parameter set may be obtained, then at least one preset template parameter with a similarity greater than or equal to a preset similarity is obtained according to a magnitude of the similarity to each preset template parameter, and if the at least one preset template parameter exists, the preset template parameter with the maximum similarity is selected from the at least one preset template parameter and is a final matched preset template parameter.

Step S803, if the preset template parameter can be matched, the processing node determines the adjustment amount of the state parameter according to the preset template parameter and the preset performance parameter.

Here, if the preset template parameter can be matched, which indicates that there is a preset template parameter having a scene similar to the current optical fiber communication scene in the preset template parameter set, the preset template parameter may be directly called to perform power adjustment on the current optical fiber communication scene without determining an adjustment amount again.

Step S804, if the preset template parameter can not be matched, the processing node determines the adjustment quantity of the state parameter according to the state parameter and the preset performance parameter.

Here, in determining the adjustment amount of the state parameter, the method further includes:

step S8041, if the absolute value of the first difference between the OSNR value of each optical channel and the preset OSNR value is smaller than a first preset threshold, or if the second difference between the pre-correction error rate of each optical channel and the preset pre-correction error rate is smaller than a second preset threshold, form a template parameter according to N state parameters corresponding to the N optical channels.

Here, if an absolute value of a first difference between the OSNR value of each optical channel and the preset OSNR value is smaller than a first preset threshold, or if a second difference between the pre-correction error rate of each optical channel and the preset pre-correction error rate is smaller than a second preset threshold, it indicates that the current optical channel has no optical fiber loss or the power of the optical channel is abnormal or attenuated, and therefore, the power of the optical channel does not need to be adjusted.

In this embodiment, when the power of the optical channel does not need to be adjusted, the template parameter is determined according to the N state parameters corresponding to the N optical channels. The template parameters include the N state parameters.

Step S8042, storing the template parameter as a preset template parameter in a preset template parameter set.

Here, the preset template parameter set includes at least one template parameter, and the template parameter may be implemented to directly adjust the power of the optical channel according to the template parameter in a subsequent optical fiber communication process.

According to the optical fiber communication method provided by the embodiment of the application, template parameters are determined according to N state parameters corresponding to the N optical channels; when the state parameters of the optical channel are acquired, if the preset template parameters can be matched in a preset template parameter set, the preset template parameters are directly called to adjust the power of the current optical fiber communication scene without determining the adjustment amount. Therefore, the efficiency of power adjustment can be effectively improved, and the optical channel state parameters under the current optical fiber communication scene can be quickly and accurately adjusted.

Based on the foregoing embodiments, the embodiments of the present application further provide an optical fiber communication method, where a controller collects full monitoring data and performs centralized computation to achieve global optimization; and the adjustment amount is quickly converged by training the machine learning template.

Fig. 9 is a schematic structural diagram of an optical fiber communication system according to an embodiment of the present application, and as shown in fig. 9, the optical fiber communication system includes: at least one wavelength converter (OTU) 901, an Optical Multiplexer Unit (OMU) 902, at least one OA 903, at least one Optical channel power equalizing Unit 904, and an Optical path splitting Unit (ODU) 905. OUT and ODU correspond to the optical fiber communication node in any one of the embodiments, and the OMU, OA, and optical channel power balancing unit corresponds to the power adjustment node in any one of the embodiments.

Wherein the OUT is used for wavelength conversion of an input signal to another wavelength to satisfy a case where the number of wavelengths is limited to be insufficient to support an application of a large number of nodes. In this embodiment, the OUT may be an optical-to-electrical wavelength converter or an all-optical wavelength converter.

The OMU may be an adjustable attenuation combiner, and is configured to combine optical carrier signals (carrying various information) with two or more different wavelengths at a transmitting end, and couple the optical carrier signals to the same optical fiber of an optical line for transmission. The OA is used to amplify an optical signal, and the principle of the optical amplifier is basically based on the stimulated emission of laser light, and the amplification is achieved by converting the energy of pump light into the energy of signal light. The optical channel power equalizing unit is opposite to the function of the OA and is used for reducing the optical signal. The ODU has a function opposite to that of the OMU, and is configured to separate optical carriers of different wavelengths from each other at a receiving end for optical carrier signals transmitted in an optical fiber.

In other embodiments, the optical fiber communication system may further include a tunable attenuation combiner for adjusting power, an optical amplifier, an optical channel power equalizing unit, and other physical media (corresponding to the power adjusting node in any of the above embodiments), and a controller for uniformly managing and centrally calculating (corresponding to the processing node in any of the above embodiments). The physical media such as the adjustable attenuation wave combiner, the optical amplifier, the optical channel power equalizing unit and the like are mainly used for adjusting the optical power values of all wavelengths, all channels and all spans.

Fig. 10 is a schematic structural diagram of a controller provided in the embodiment of the present application, and as shown in fig. 10, the controller includes a data acquisition unit 1001, a calculation unit 1002, a storage unit 1003, and a data issuing unit 1004.

The data acquisition unit 1001 is mainly used for acquiring data such as optical channel power, amplifier gain, line power, and the like. The calculating unit 1002 is mainly used for performing iterative calculation on the acquired data according to a set algorithm model. It should be noted that, during iterative computation, the feedback information may be key performance indicators such as OSNR and pre-correction bit error rate. In addition, the initial comparison value required by calculation can be extracted from the storage unit 1003, and after the optimal configuration value of each parameter in the scene is obtained through calculation, the optimal configuration value is sent back to the storage unit and submitted to the data issuing unit.

The storage unit 1003 mainly stores the optimal configuration values of parameters such as optical channel power, amplifier gain, line power and the like under the existing model, sends the optimal configuration values as basic data templates to the calculation unit 1002, and updates the template database according to data returned by the calculation unit 1002. The data issuing unit 1004 is configured to issue the optimal configuration value generated by the calculating unit to a relevant network element, where the relevant network element may be a physical medium such as an adjustable attenuation combiner, an optical amplifier, an optical channel power equalizing unit, and the like.

Fig. 11 is a schematic implementation flowchart of a fiber optic communication method according to an embodiment of the present application, and as shown in fig. 11, the method includes the following steps:

step S1101, the data acquisition unit acquires data, reads a data template in the template database that is most similar to the state parameter of the current scene, and calculates an OSNR value of each channel.

Step S1102, the data acquisition unit determines | OSNR_i(i.ltoreq.N) -whether Tar | < 1 for each OSNR_iIs true.

Here, OSNR_iRepresents the OSNR value of the ith optical channel, N is the number of optical channels, and Tar is the preset target OSNR value, | OSNR_{i son}-Tar|＜|OSNR_{i father}-Tar | is for OSNR_i(i is less than or equal to N) -taking an absolute value of Tar.

If the judgment result is no, executing step S1103; if so, step S1104 is performed.

Step S1103, the calculating unit assigns an iteration step Delta to all the state parameters, and recalculates the OSNR according to the iteration step Delta_i。

Step S1104, the storage unit stores all the state parameters as new data templates into the storage unit; the data issuing unit issues the state parameter to the execution unit. Here, the execution unit is a physical medium such as an adjustable attenuation combiner, an optical amplifier, an optical channel power equalization unit, and the like.

In this embodiment, after the data acquisition unit acquires data, first, a data template most similar to the scene in the template database is read; the calculation unit calculates the OSNR of each channel, sets an optimized target OSNR value Tar, and if the OSNR of each channel meets the requirements after adjustment, all the values are stored in the storage unit as new data templates and are issued to a physical medium to complete the process; and if the OSNR of each channel does not meet the requirement, allocating iteration step length to all the state parameters, and performing iterative computation according to a set algorithm model until the OSNR of each channel converges to the range of the target OSNR value Tar.

In this embodiment, an optional iterative algorithm is further provided, and an algorithm flowchart thereof is shown in fig. 12, and includes the following steps:

in step S1201, the computing unit modulates all the state parameters to form an N-dimensional vector which is initially a 0 vector. N is the number of optical channels, or N is the number of execution units, such as the number of physical media of the adjustable attenuation combiner, the optical amplifier, the optical channel power equalization unit, and the like. The N-dimensional vector at this time, which is initially a 0 vector, serves as a parent vector of the iteration.

In step S1202, the calculation unit forms a new N-dimensional vector with a mean value of 0 and a variance of δ. And forming a new N-dimensional vector with the mean value of 0 and the variance of delta on the basis of the N-dimensional vector which is initially the 0 vector.

In step S1203, the calculating unit adds the new N-dimensional vector and the parent vector as a child vector and sends the child vector to the executing unit.

In step S1204, the calculation unit calculates OSNR_iAnd judging | OSNR |_{i son}-Tar|＜|OSNR_{i father}-whether Tar | holds. OSNR_{i son}Is the OSNR value, OSNR, of the ith sub-generation vector_{i father}Is the OSNR value of the ith parent vector.

If the judgment result is yes, executing step S1205; if not, execution continues with step S1202.

In step S1205, the calculation unit judges | OSNR of the child_i(i is less than or equal to N) -whether Tar < 1 is true or not. If the judgment result is yes, executing step S1206; if not, step S1207 is performed.

In step S1206, the storage unit records the child vector.

In step S1207, the data issuing unit takes the child vector as a new parent vector.

Obtaining a final offspring vector through the iterative operation process from step S1201 to step S1207, which is a final adjusted state parameter, wherein the iteration step size is an OSNR at each iteration in the iterative process_{i son}And OSNR_{i father}The difference between them.

The optical fiber communication method provided by the embodiment of the application supports the introduction of key performance indexes such as OSNR and pre-correction bit error rate as a monitoring index and a feedback regulation basis, can reduce OSNR deterioration caused by power balance, and ensures certain transmission performance. The controller collects the full monitoring data and performs centralized calculation, and the machine learning template training realizes global optimization and rapid convergence under the condition of numerous control parameters.

Based on the foregoing embodiments, the present application provides an optical fiber communication apparatus, where the apparatus includes modules and components included in the modules, and may be implemented by a processor in an optical fiber communication device; of course, it may also be implemented by logic circuitry; in implementation, the processor may be a Central Processing Unit (CPU), a Microprocessor (MPU), a Digital Signal Processor (DSP), a Field Programmable Gate Array (FPGA), or the like.

Fig. 13 is a schematic structural diagram of an optical fiber communication apparatus according to an embodiment of the present application, and as shown in fig. 13, the optical fiber communication apparatus 1300 includes:

an obtaining unit 1301, configured to obtain a state parameter of an optical channel between the at least two optical fiber communication nodes; a determining unit 1302, configured to determine an adjustment amount of the state parameter according to the state parameter and a preset performance parameter; a sending unit 1303, configured to send the adjustment amount to the power adjustment node, so that the power adjustment node adjusts the state parameter.

In other embodiments, the preset performance parameters include: presetting an OSNR value; correspondingly, the determining unit comprises: the first forming module is used for forming an iteration initial value according to the state parameters and the number of the state parameters; the input module is used for inputting the iteration initial value and the preset OSNR value into a preset iteration formula to carry out iterative operation; and the first determining module is used for determining an iterative operation result obtained through the iterative operation as the adjustment quantity of the state parameter.

In other embodiments, the preset performance parameter further includes a preset pre-correction bit error rate, and correspondingly, the input module includes: and the input submodule is used for inputting the iteration initial value, the preset OSNR value and the preset pre-correction error rate into a preset iteration formula for iterative operation.

In other embodiments, there are N optical channels between the at least two optical fiber communication nodes, and each optical channel corresponds to one of the status parameters; correspondingly, the determining unit further includes: the second determining module is used for determining the OSNR value of the corresponding optical channel according to the state parameter corresponding to each optical channel; determining a first difference between the OSNR value of each optical channel and the preset OSNR value; and the second forming module is used for forming an iteration initial value according to the state parameters and the number of the state parameters if the absolute value of at least one first difference value is greater than or equal to a first preset threshold value.

In other embodiments, there are N optical channels between the at least two optical fiber communication nodes, and each optical channel corresponds to one status parameter; correspondingly, the determining unit further includes: the third determining module is used for determining the error rate of the OSNR value of the corresponding optical channel according to the state parameter corresponding to each optical channel; determining a first difference between the OSNR value of each optical channel and the preset OSNR value; determining a second difference value between the pre-correction error rate of each optical channel and the preset pre-correction error rate; and a third forming module, configured to form an iteration initial value according to the state parameters and the number of the state parameters if at least one first difference absolute value is greater than or equal to a first preset threshold or if at least one second difference absolute value is greater than or equal to a second preset threshold.

In other embodiments, the state parameters include noise power and optical channel power of the optical channel; correspondingly, the preset performance parameter comprises a preset OSNR value; correspondingly, the determining unit comprises: a fourth determining module, configured to determine an OSNR value of the optical channel according to a ratio between the optical channel power and the noise power of the optical channel; determining a third difference value between the OSNR value of the optical channel and the preset OSNR value; determining a product of the third difference and the noise power of the optical channel as a first adjustment amount; the first adjustment amount is an adjustment amount of the optical channel power.

In other embodiments, the obtaining unit includes: a fifth determining module, configured to determine another optical channel adjacent to the optical channel, and form a connection channel with the another optical channel through the optical channel; determining the power value of the optical fiber communication node positioned in the middle of the connection channel as the noise power; a first obtaining module, configured to obtain a power value of each optical fiber communication node in two optical fiber communication nodes corresponding to the optical channel; a sixth determining module, configured to determine an average value of the two power values corresponding to the two optical fiber communication nodes as the optical channel power.

In other embodiments, the state parameters include noise power and gain power of the optical channel; correspondingly, the preset performance parameter comprises the preset OSNR value; the determination unit includes: a seventh determining module, configured to determine an OSNR value of the optical channel according to a ratio between the gain power and a noise power of the optical channel; determining a fourth difference between the OSNR value of the optical channel and the preset OSNR value; determining a product of the fourth difference and the noise power of the optical channel as a second adjustment amount; the second adjustment amount is an adjustment amount of the gain power.

In other embodiments, the gain power is a gain power of an optical amplifier in the optical channel; correspondingly, the acquisition unit comprises: an eighth determining module, configured to determine another optical channel adjacent to the optical channel, and form a connection channel with the another optical channel through the optical channel; determining the power value of the optical fiber communication node positioned in the middle of the connection channel as the noise power; determining the output power of the optical amplifier according to the product of the amplification factor of the optical amplifier and the input power of the optical amplifier; determining the gain power according to a difference between the output power and the input power.

In other embodiments, the state parameters include line power corresponding to all or part of the optical channels and noise power of each optical channel; correspondingly, the preset performance parameter comprises the preset OSNR value; correspondingly, the determining unit comprises: a ninth determining module, configured to determine a noise power average of all or part of the optical channels according to the noise power of each of the all or part of the optical channels; determining the OSNR value of all or part of the optical channels according to the ratio of the line power to the noise power average value; determining a fifth difference value between the OSNR value of all or part of the optical channels and the preset OSNR value; determining a product of the fifth difference value and the noise power mean value as a third adjustment amount; the third adjustment amount is an adjustment amount of the line power.

In other embodiments, the obtaining unit includes: a second obtaining module, configured to obtain a power value of each optical fiber communication node in two optical fiber communication nodes corresponding to the optical channel; a tenth determining module, configured to determine an average value of two power values corresponding to the two optical fiber communication nodes as the optical channel power; determining an optical channel power average value of all or part of the optical channels according to the optical channel power of each optical channel in all or part of the optical channels; and determining the average value of the optical channel power as the line power.

In other embodiments, the power adjustment node comprises at least one of: the device comprises an adjustable attenuation wave combiner, an optical channel power equalizer and an optical amplifier; the adjustment amount comprises a down adjustment amount and an up adjustment amount; correspondingly, the sending unit comprises: a sending module, configured to determine that the adjustment amount is the down adjustment amount if the adjustment amount is smaller than 0, and send the down adjustment amount to the adjustable attenuation combiner and/or the optical channel power equalizer, so that the adjustable attenuation combiner and/or the optical channel power equalizer reduce the state parameter according to the down adjustment amount; and if the adjustment quantity is larger than 0, determining the adjustment quantity as the up-regulation quantity, and sending the up-regulation quantity to the optical amplifier so that the optical amplifier increases the state parameter according to the up-regulation quantity.

In other embodiments, the apparatus further comprises: the matching unit is used for matching preset template parameters with preset similarity with the state parameters in a preset template parameter set; a second determining unit, configured to determine, if the preset template parameter can be matched, an adjustment amount of the state parameter according to the preset template parameter and the preset performance parameter; and if the preset template parameters cannot be matched, determining the adjustment quantity of the state parameters according to the state parameters and the preset performance parameters.

In other embodiments, there are N optical channels between the at least two optical fiber communication nodes, and each optical channel corresponds to one status parameter; correspondingly, the device further comprises: a forming unit, configured to form a template parameter according to N state parameters corresponding to the N optical channels if the preset template parameter cannot be matched and an absolute value of a first difference between an OSNR value of each optical channel and a preset OSNR value is smaller than a first preset threshold, or if the preset template parameter cannot be matched and a second difference between a pre-correction error rate of each optical channel and a preset pre-correction error rate of each optical channel is smaller than a second preset threshold; and the storage unit is used for taking the template parameters as the preset template parameters and storing the preset template parameters into the preset template parameter set.

It should be noted that, in the embodiment of the present application, if the optical fiber communication method is implemented in the form of a software functional module and sold or used as a standalone product, the optical fiber communication method may also be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a terminal to execute all or part of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read Only Memory (ROM), a magnetic disk, or an optical disk. Thus, embodiments of the invention are not limited to any specific combination of hardware and software.

Correspondingly, an optical fiber communication device is provided in an embodiment of the present application, fig. 14 is a schematic structural diagram of the optical fiber communication device provided in the embodiment of the present application, and as shown in fig. 14, the optical fiber communication device 1400 at least includes: a processor 1401, a communications interface 1402, and a storage medium 1403 configured to store executable instructions, wherein: a processor 1401 generally controls the overall operation of the fiber optic communications device 1400.

The communication interface 1402 may enable the fiber optic communication device to communicate with other terminals or servers via a network.

The storage medium 1403 is configured to store instructions and applications executable by the processor 1401, and may also cache data to be processed or processed by each module in the processor 1401 and the optical fiber communication device 1400, and may be implemented by a FLASH Memory (FLASH) or a Random Access Memory (RAM).

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in various embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention. The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

It should be noted that, in this document, the terms "comprises", "comprising" or any other variation thereof are intended to cover a non-exclusive inclusion, so that a process, a method or an apparatus including a series of elements includes not only those elements but also other elements not explicitly listed or inherent to such process, method or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units; can be located in one place or distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment. Those of ordinary skill in the art will understand that: all or part of the steps for realizing the method embodiments can be completed by hardware related to program instructions, the program can be stored in a computer readable storage medium, and the program executes the steps comprising the method embodiments when executed; and the aforementioned storage medium includes: various media that can store program code, such as removable storage devices, read-only memories, magnetic or optical disks, etc. Alternatively, the integrated unit of the present invention may be stored in a computer-readable storage medium if it is implemented in the form of a software functional module and sold or used as a separate product. Based on such understanding, the technical solutions of the embodiments of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a terminal to execute all or part of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: a removable storage device, a ROM, a magnetic or optical disk, or other various media that can store program code.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention, and all such changes or substitutions are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. An optical fiber communication method is applied to an optical transmission network or an optical wavelength division multiplexing (OTN/WDM) system, wherein the OTN/WDM system comprises a processing node, at least two optical fiber communication nodes and a power adjusting node; the method comprises the following steps:

the processing node acquires state parameters of an optical channel between the at least two optical fiber communication nodes; the state parameters comprise noise power and optical channel power of the optical channel, wherein channels adjacent to the optical channel and the optical channel form a connecting channel, and the noise power is a power value of an optical fiber communication node at the middle position of the connecting channel;

determining the adjustment amount of the state parameter according to the state parameter and a preset performance parameter, wherein the adjustment amount comprises the following steps: determining an OSNR value of the optical channel according to a ratio of the optical channel power to the noise power of the optical channel; determining a third difference value between the OSNR value of the optical channel and a preset OSNR value; determining a product of the third difference and the noise power of the optical channel as a first adjustment amount; the first adjustment amount is the adjustment amount of the optical channel power;

and sending the adjustment amount to the power adjustment node so that the power adjustment node adjusts the state parameter.

2. The method of claim 1, wherein determining the adjustment amount of the state parameter according to the state parameter and a preset performance parameter comprises:

forming an iteration initial value according to the state parameters and the number of the state parameters;

inputting the iteration initial value and the preset OSNR value into a preset iteration formula to carry out iterative operation;

and determining an iterative operation result obtained through the iterative operation as the adjustment quantity of the state parameter.

3. The method according to claim 2, wherein the preset performance parameters further include a preset pre-correction bit error rate, and correspondingly, the inputting the iteration initial value and the preset OSNR value into a preset iteration formula to perform an iterative operation includes: and inputting the iteration initial value, the preset OSNR value and the preset pre-correction error rate into a preset iteration formula to perform iterative operation.

4. The method according to claim 2, wherein there are N optical channels between said at least two optical fiber communication nodes, each of said optical channels corresponding to one of said status parameters; correspondingly, the determining the adjustment amount of the state parameter according to the state parameter and the preset performance parameter further includes:

the processing node determines an OSNR value of a corresponding optical channel according to the state parameter corresponding to each optical channel;

determining a first difference between the OSNR value of each optical channel and the preset OSNR value;

and if the absolute value of at least one first difference is larger than or equal to a first preset threshold, forming an iteration initial value according to the state parameters and the number of the state parameters.

5. The method of claim 3, wherein there are N optical channels between said at least two optical fiber communication nodes, each of said optical channels corresponding to a status parameter; correspondingly, the determining the adjustment amount of the state parameter according to the state parameter and the preset performance parameter further includes:

the processing node determines an OSNR value of a corresponding optical channel and a pre-correction error rate of the corresponding optical channel according to the state parameter corresponding to each optical channel;

determining a second difference value between the pre-correction error rate of each optical channel and the preset pre-correction error rate;

and if the absolute value of at least one first difference is greater than or equal to a first preset threshold, or if the absolute value of at least one second difference is greater than or equal to a second preset threshold, forming an iteration initial value according to the state parameters and the number of the state parameters.

6. The method of claim 1, wherein the processing node obtaining the state parameters of the optical channel between the at least two optical fiber communication nodes comprises:

the processing node determines another optical channel adjacent to the optical channel, and a connection channel is formed by the optical channel and the another optical channel; determining the power value of the optical fiber communication node positioned in the middle of the connection channel as the noise power;

the processing node acquires a power value of each optical fiber communication node in two optical fiber communication nodes corresponding to the optical channel; and determining the average value of the two power values corresponding to the two optical fiber communication nodes as the optical channel power.

7. The method of claim 1, wherein the status parameters include a noise power and a gain power of the optical channel;

the determining the adjustment amount of the state parameter according to the state parameter and the preset performance parameter further comprises:

determining an OSNR value of the optical channel according to a ratio between the gain power and a noise power of the optical channel;

determining a fourth difference between the OSNR value of the optical channel and the preset OSNR value;

determining a product of the fourth difference and the noise power of the optical channel as a second adjustment amount; the second adjustment amount is an adjustment amount of the gain power.

8. The method of claim 7, wherein the gain power is a gain power of an optical amplifier in the optical channel; correspondingly, the acquiring, by the processing node, the state parameter of the optical channel between the at least two optical fiber communication nodes includes:

the processing node determines the output power of the optical amplifier according to the product of the amplification factor of the optical amplifier and the input power of the optical amplifier; determining a difference between the output power and the input power as the gain power.

9. The method of claim 1, wherein the status parameters include line power and noise power of each optical channel corresponding to all or part of the optical channels;

correspondingly, the determining the adjustment amount of the state parameter according to the state parameter and the preset performance parameter includes:

determining a noise power mean value of all or part of the optical channels according to the noise power of each optical channel in all or part of the optical channels;

determining the OSNR value of all or part of the optical channels according to the ratio of the line power to the noise power average value;

determining a fifth difference value between the OSNR value of all or part of the optical channels and the preset OSNR value;

determining a product of the fifth difference value and the noise power mean value as a third adjustment amount; the third adjustment amount is an adjustment amount of the line power.

10. The method of claim 9, wherein the processing node obtaining the status parameters of the optical channel between the at least two optical fiber communication nodes comprises:

the processing node acquires a power value of each optical fiber communication node in two optical fiber communication nodes corresponding to the optical channel; determining the average value of two power values corresponding to the two optical fiber communication nodes as the optical channel power;

determining an optical channel power average value of all or part of the optical channels according to the optical channel power of each optical channel in all or part of the optical channels; and determining the average value of the optical channel power as the line power.

11. The method according to any of claims 1 to 10, wherein the power adjustment node comprises at least one of: the device comprises an adjustable attenuation wave combiner, an optical channel power equalizer and an optical amplifier; the adjustment amount comprises a down adjustment amount and an up adjustment amount;

correspondingly, the sending the adjustment amount to the power adjustment node to enable the power adjustment node to adjust the state parameter includes:

if the adjustment amount is less than 0, determining the adjustment amount as the down-adjustment amount, and sending the down-adjustment amount to the adjustable attenuation combiner and/or the optical channel power equalizer, so that the adjustable attenuation combiner and/or the optical channel power equalizer reduces the state parameter according to the down-adjustment amount;

and if the adjustment quantity is larger than 0, determining the adjustment quantity as the up-regulation quantity, and sending the up-regulation quantity to the optical amplifier so that the optical amplifier increases the state parameter according to the up-regulation quantity.

12. The method according to any of claims 1 to 10, wherein after the processing node obtains the status parameters of the optical channel between the at least two optical fiber communication nodes, the method further comprises:

the processing node matches preset template parameters with preset similarity with the state parameters in a preset template parameter set;

if the preset template parameters can be matched, the processing node determines the adjustment quantity of the state parameters according to the preset template parameters and the preset performance parameters;

and if the preset template parameters cannot be matched, the processing node determines the adjustment quantity of the state parameters according to the state parameters and the preset performance parameters.

13. The method of claim 12, wherein there are N optical channels between said at least two optical fiber communication nodes, each of said optical channels corresponding to a status parameter; correspondingly, the method further comprises:

if the preset template parameters cannot be matched and the absolute value of a first difference value between the OSNR value of each optical channel and the preset OSNR value is smaller than a first preset threshold value, or if the preset template parameters cannot be matched and a second difference value between the pre-correction error rate and the preset pre-correction error rate of each optical channel is smaller than a second preset threshold value, forming template parameters according to N state parameters corresponding to the N optical channels;

and taking the template parameter as the preset template parameter and storing the preset template parameter in the preset template parameter set.

14. A fiber optic telecommunications device, comprising:

the device comprises an acquisition unit, a processing unit and a control unit, wherein the acquisition unit is used for acquiring the state parameters of an optical channel between at least two optical fiber communication nodes; the state parameters comprise noise power and optical channel power of the optical channel, wherein channels adjacent to the optical channel and the optical channel form a connecting channel, and the noise power is a power value of an optical fiber communication node at the middle position of the connecting channel;

a determining unit, configured to determine an OSNR value of the optical channel according to a ratio between the optical channel power and a noise power of the optical channel; determining a third difference value between the OSNR value of the optical channel and a preset OSNR value; determining a product of the third difference and the noise power of the optical channel as a first adjustment amount; the first adjustment amount is the adjustment amount of the optical channel power;

and the sending unit is used for sending the adjustment amount to a power adjustment node so as to enable the power adjustment node to adjust the state parameter.

15. A fiber optic telecommunications device, comprising at least: a processor and a storage medium configured to store executable instructions, wherein: the processor is configured to execute stored executable instructions;

the executable instructions are configured to perform the optical fiber communication method provided by any of the above claims 1 to 13.

16. A storage medium having stored thereon computer-executable instructions configured to perform the optical fiber communication method as provided in any one of claims 1 to 13.