CN117061004A

CN117061004A - Network adjustment method, optical transmission network and related equipment

Info

Publication number: CN117061004A
Application number: CN202210487865.XA
Authority: CN
Inventors: 陈诗; 姚海涛; 杨维利
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-05-06
Filing date: 2022-05-06
Publication date: 2023-11-14

Abstract

The embodiment of the application discloses a network adjusting method, an optical transmission network and related equipment, which are used for reducing the inclination in the optical transmission network so as to improve the transmission effect of optical signals with different wavelengths. The method of the embodiment of the application is applied to control equipment and comprises the following steps: receiving first optical power information from a first detection device and second optical power information from a second detection device; the first detection device and the second detection device are respectively connected with an input end and an output end of an optical fiber circuit, and the optical fiber circuit comprises a multi-span optical fiber and an optical amplifier; determining an inclination adjustment value according to the first optical power information and the second optical power information, wherein the inclination adjustment value is used for adjusting the gain inclination of the optical amplifier; the tilt adjustment value is sent to the optical amplifier.

Description

Network adjustment method, optical transmission network and related equipment

Technical Field

Embodiments of the present application relate to the field of optical communications, and in particular, to a network adjustment method, an optical transmission network, and related devices.

Background

In an optical transmission network, due to some characteristics of the optical fiber (for example, stimulated raman scattering (stimulated raman scattering, SRS), wavelength dependent loss (wavelength dependent loss, WDL), etc.), there is a difference in the attenuation degree between optical signals of different wavelengths in the optical fiber transmission, and the power spectrum of the output end of the optical fiber is tilted.

In one common solution, a detection device is added to the optical network, and an optical amplifier at the detection device is adjusted according to optical power information at the detection device. And if the power gradient at the detection equipment is still larger after adjustment, adjusting the light emission at the upstream of the detection equipment until the power gradient at the detection equipment meets the preset requirement.

However, this method can only ensure that the power gradient at the detection device meets the preset requirement, and cannot ensure the power gradient at other points in the optical network. If the optical power gradient at other points does not meet the preset requirement, the attenuation degree of the optical signals with different wavelengths is different near the other points, so that the power spectrum of the optical fiber output end near the other points is inclined, and the transmission effect of the optical signals is affected.

Disclosure of Invention

The embodiment of the application provides a network adjusting method, an optical transmission network and related equipment, which are used for reducing the inclination in the optical transmission network so as to improve the transmission effect of optical signals with different wavelengths.

In a first aspect, an embodiment of the present application provides a network adjustment method, where the method is applied to a control device, and the method includes: the control device receives the first optical power information from the first detection device and the second optical power information from the second detection device. The first detection device and the second detection device are respectively connected with the input end and the output end of the optical fiber line. The first optical power information and the second optical power information reflect optical power information of an input end and an output end of the optical fiber line, respectively. The fiber optic line includes a multi-span optical fiber and an optical amplifier. Then, the control device determines a tilt adjustment value from the first optical power information and the second optical power information. The tilt adjustment value is used to adjust the gain tilt of an optical amplifier in the optical fiber line to reduce the output power spectrum tilt of the optical fiber in the optical fiber line. The inclination adjustment value is determined and the control device may send the inclination adjustment value to the optical amplifier in the optical fiber line, thereby causing the optical amplifier to adjust the gain inclination in accordance with the inclination adjustment value.

In the embodiment of the application, because the detection device detects the information of the head and the tail (the input end and the output end) of the optical fiber line, the determined inclination adjustment value reflects the change of the power inclination of the whole optical fiber line. The optical amplifier is adjusted according to the inclination adjustment value, and the gain inclination of the adjusted optical amplifier can offset the attenuation inclination generated by the multi-span optical fibers in the whole optical fiber line, so that the optical power inclination between the output end and the input end of the optical fiber line is reduced, and the transmission effect of optical signals in the optical fiber line is improved.

In addition, the application adjusts the inclination of the output power spectrum of the multi-span optical fiber in the optical fiber line by adjusting the gain inclination of the optical amplifier, thereby not bringing extra insertion loss to the optical fiber line, ensuring that the power inclination of the optical fiber line is at a lower level and simultaneously not causing extra optical power loss.

In an alternative implementation, the fiber optic line includes a plurality of optical amplifiers. The control device may determine a total amount of inclination adjustment of the optical fiber line based on the first optical power information and the second optical power information. The control device may then determine respective tilt adjustment values for the plurality of optical amplifiers in the fiber optic line based on the total amount of tilt adjustment. The control device then sends corresponding tilt adjustment values to the plurality of optical amplifiers, respectively.

In the embodiment of the application, the respective inclination adjustment values of the plurality of optical amplifiers are determined according to the total inclination adjustment amount, so that the gain inclination of the plurality of optical amplifiers in the optical fiber line is adjusted, and the gain inclination of the adjusted optical amplifiers is more matched with the attenuation inclination of the optical fiber. By increasing the degree of matching between the gain tilt of the optical amplifier and the attenuation tilt of the downstream optical fiber, the difference in power tilt between the input end of the optical amplifier and the output end of the downstream optical fiber is reduced, thereby reducing the difference in optical power tilt between the output ends of different optical fibers in the overall optical fiber line (the input end of the optical amplifier is connected to the output end of the upstream optical fiber in the optical fiber line). The variation of the inclination of the optical power in the optical fiber circuit is reduced, the difference of the transmission performance of the optical signals with different wavelengths is reduced, and the overall transmission effect of the optical signals is improved.

In an alternative implementation, the tilt adjustment value is used to adjust the gain tilt of a plurality of optical amplifiers in the fiber optic line simultaneously.

In an alternative implementation, if the total amount of tilt adjustment is K, the optical fiber line includes N optical amplifiers (N is an integer greater than 0), the control device may determine the tilt adjustment value of the N optical amplifiers to be K/N. The optional optical fiber line may include N optical amplifiers with adjustable gain inclination, and in addition to the N optical amplifiers with adjustable gain inclination, the optical fiber line may also include an optical amplifier with non-adjustable gain inclination, which is not limited in the present application.

In the embodiment of the application, according to the number N of the optical amplifiers with adjustable gain gradient in the optical fiber circuit, the average value K/N is taken for the total gradient adjustment quantity K, so as to obtain the gradient adjustment values of N optical amplifiers. The calculation method for taking the average value is simple, convenient and quick, has high efficiency, and can realize the timely adjustment of the optical fiber line. Because of simple and convenient calculation, resources such as calculation power, storage and the like of the control equipment can be saved.

In an alternative implementation, the fiber optic line includes multi-span optical fibers connected in sequence by a plurality of optical amplifiers. The control device may determine respective tilt adjustment values for the plurality of optical amplifiers based on the total amount of tilt adjustment and information for the multi-span optical fiber. Alternatively, the inclination adjustment values of the plurality of optical amplifiers may be different in magnitude.

In the embodiment of the application, according to the total inclination adjustment amount K and the information of the multi-span optical fibers, the inclination adjustment values of the optical amplifiers are determined. The reasonable distribution of the total amount K of inclination adjustment to different optical amplifiers can be realized according to the information of the optical fibers connected with the optical amplifiers. For example, a larger tilt adjustment value may be assigned to an optical amplifier having a longer optical fiber (a greater degree of increased power tilt) connected downstream, and a smaller tilt adjustment value may be assigned to an optical amplifier having a shorter optical fiber (a lesser degree of increased power tilt) connected downstream. Therefore, the moderate offset of the increase of the power gradient is realized, the difference of the power gradients among the output ends of different optical fibers in the optical fiber circuit is reduced, the variation of the optical power gradient in the optical fiber circuit is reduced, and the transmission effect of optical signals with different wavelengths is ensured.

In an alternative implementation, the first optical power information comprises a first optical power spectrum of the first detection device, i.e. the first optical power spectrum detected by the first detection device. The control device may determine a third optical power spectrum of the input end of the optical fiber line from the first optical power spectrum. The control device may then determine a tilt adjustment value from the third optical power spectrum and the second optical power information.

In the embodiment of the application, the first detection device can not be arranged at the input end of the optical fiber line, and the third optical power information at the input end of the optical fiber line can be determined according to the first optical power information detected by the first detection device, so that on one hand, the accuracy of the optical power information of the input end of the optical fiber line required in the calculation process of the inclination adjustment value can be ensured, and on the other hand, the position of the input end of the optical fiber line can be decoupled from the position of the first detection device, so that the position of the first detection device is more flexible.

In an alternative implementation, the fiber optic line includes multi-span optical fibers that are connected in sequence by an optical amplifier. The input end of the first optical fiber in the multi-span optical fiber is connected with the output end of the first optical amplifier. The first detection device is used for detecting a first optical power spectrum of the output end of the first optical amplifier. If the input end of the optical fiber line is the input end of the first optical amplifier, the control device may determine a third optical power spectrum of the input end of the optical fiber line according to the first optical power spectrum and the information of the first optical amplifier.

In an alternative implementation, the second optical power information comprises a second optical power spectrum of the second detection device, i.e. the second optical power spectrum detected by the second detection device. The control device may determine a fourth optical power spectrum of the output end of the optical fiber line from the second optical power spectrum. The control device may then determine a tilt adjustment value from the first optical power information and the fourth optical power spectrum.

In the embodiment of the application, the second detection device can not be arranged at the output end of the optical fiber line, and the fourth optical power information at the output end of the optical fiber line can be determined according to the second optical power information detected by the second detection device, so that on one hand, the accuracy of the optical power information at the output end of the optical fiber line required in the calculation process of the inclination adjustment value can be ensured, and on the other hand, the position of the output end of the optical fiber line can be decoupled from the position of the second detection device, and the position of the second detection device is more flexible.

In an alternative implementation, the fiber optic line includes multi-span optical fibers that are connected in sequence by an optical amplifier. The output end of the tail optical fiber in the multi-span optical fiber is connected with the input end of the second optical amplifier. The second detection device is used for detecting a second optical power spectrum of the output end of the second optical amplifier. If the output end of the optical fiber line is the output end of the tail optical fiber, the control device may determine a fourth optical power spectrum of the output end of the optical fiber line according to the second optical power spectrum and the information of the second optical amplifier.

In an alternative implementation, the control device may send the inclination adjustment value to the optical amplifier if it is determined that the inclination adjustment value is greater than or equal to the first threshold value.

In the embodiment of the application, the inclination adjustment value frequently sent by the control equipment is avoided by setting the first threshold value, so that frequent inclination adjustment of the optical transmission network is avoided, and network fluctuation is avoided.

In an alternative implementation, the control device may determine an average adjustment value of the tilt adjustment value over the first time period, thereby sending the average adjustment value to the optical amplifier in the fiber line.

In the embodiment of the application, frequent inclination adjustment of the optical transmission network is avoided by taking the average value of the inclination adjustment value in the first time period, so that network fluctuation can be avoided.

In an alternative implementation, the fiber optic line may transmit optical signals in multiple bands. The first optical power information includes first information of an input optical signal of a first wavelength band (i.e., optical power information reflecting an optical signal of the first wavelength band at an input end of the optical fiber line) and second information of an input optical signal of a second wavelength band (i.e., optical power information reflecting an optical signal of the second wavelength band at an input end of the optical fiber line). The second optical power information includes third information of the output optical signal of the first band (i.e., optical power information reflecting the optical signal of the first band at the output end of the optical fiber line) and fourth information of the output optical signal of the second band (i.e., optical power information reflecting the optical signal of the second band at the output end of the optical fiber line). The control device may determine a first tilt adjustment value for adjusting a gain tilt of the optical amplifier of the first wavelength band on the optical fiber line based on the first information and the third information.

In the embodiment of the application, the inclination adjustment value is calculated by the sub-wave band, so that the corresponding inclination adjustment value is sent to the optical amplifiers of different wave bands in the optical fiber line. Granularity of inclination adjustment is thinned to different wavebands, gain inclination adjustment more suitable for each waveband is carried out according to the conditions of different wavebands, and therefore the transmission effect of optical signals of different wavebands in an optical fiber circuit is improved.

In an alternative implementation, the control device may determine the optical power variation between the output end and the input end of the optical fiber line according to the first optical power information and the second optical power information. The control device can then determine the total amount of tilt adjustment as the tilt of the optical power variation.

In the embodiment of the application, the optical power change between the input end and the output end can reflect the degree of inclination adaptation between each optical amplifier and the corresponding optical fiber (the downstream optical fiber or the upstream optical fiber connected with the optical amplifier) in the optical fiber line, so that the degree of gain inclination of the adjusted optical amplifier is more adapted to the attenuation inclination of the corresponding optical fiber. The degree of canceling the optical power inclination of the optical amplifier after adjustment is more matched with the degree of generating the optical power inclination of the corresponding optical fiber, so that the difference of the power inclinations between the output ends of different optical fibers in the optical fiber circuit can be reduced more effectively, the variation of the optical power inclination in the whole optical fiber circuit is reduced, and the transmission effect of optical signals with different wavelengths is ensured more effectively.

In an alternative implementation, the control device may determine a first optical power inclination of the input end of the optical fiber line according to the first optical power information, and determine a second optical power inclination of the output end of the optical fiber line according to the second optical power information. The control device may then determine the total amount of tilt adjustment as a change in optical power tilt between the first optical power tilt and the second optical power tilt.

In the embodiment of the application, the total inclination adjustment amount is determined by calculating the change of the optical power inclination between the second optical power inclination of the output end and the first optical power inclination of the input end, and the calculation method is simple, so that the resources such as calculation power, storage and the like of the control equipment can be saved.

In a second aspect, an embodiment of the present application provides an optical transmission network, where the network includes an optical fiber line, a first detection device, a second detection device, a control device, and an optical amplifier. Wherein the optical fiber line comprises a multi-span optical fiber and an optical amplifier. The first detection device is used for sending first optical power information to the control device. The second detection device is used for sending second optical power information to the control device. The first detection device and the second detection device are respectively connected with the input end and the output end of the optical fiber line. The control device is configured to receive the first optical power information and the second optical power information and to send a tilt adjustment value to an optical amplifier in the optical fiber line based on the first optical power information and the second optical power information.

Advantageous effects of implementation manners of the second aspect and the second aspect refer to the first aspect, and are not described here again.

In an alternative implementation, the fiber optic line includes a plurality of optical amplifiers. The control device is specifically configured to send corresponding inclination adjustment values to the plurality of optical amplifiers, respectively.

In an alternative implementation, multiple optical amplifiers in the fiber optic line are used to adjust the gain tilt simultaneously according to the tilt adjustment value.

In an alternative implementation, the fiber optic line includes N optical amplifiers (N is an integer greater than 0). The control device is specifically configured to send inclination adjustment values with the same size to the N optical amplifiers, where the inclination adjustment values are K/N; wherein K is the total inclination adjustment amount of the optical fiber circuit. Optionally, the N optical amplifiers included in the optical fiber line may be an optical amplifier with adjustable gain gradient, and besides the N optical amplifiers with adjustable gain gradient, the optical fiber line may also include an optical amplifier with non-adjustable gain gradient, which is not limited in the present application.

In an alternative implementation, the fiber optic line includes a plurality of optical amplifiers. The control device is used for respectively sending inclination adjustment values with different sizes to the plurality of optical amplifiers.

In an alternative implementation, the fiber optic line includes multi-span optical fibers that are connected in sequence by an optical amplifier. The input end of a first optical fiber in the multi-span optical fibers is connected with the output end of the first optical amplifier, and the first detection equipment is used for detecting first optical power information of the output end of the first optical amplifier. Alternatively, the input end of the optical fiber line may be the input end of the first optical amplifier.

In an alternative implementation, the fiber optic line includes multi-span optical fibers that are connected in sequence by an optical amplifier. The output end of the tail optical fiber in the multi-span optical fiber is connected with the input end of the second optical amplifier. The second detection device is used for detecting second optical power information of the output end of the second optical amplifier. Alternatively, the output end of the optical fiber line may be the output end of the pigtail.

In an alternative implementation, the control device is specifically configured to send a tilt adjustment value greater than or equal to a first threshold value to an optical amplifier in the optical fiber line.

In an alternative implementation, the fiber optic line includes a first band of optical amplifiers and a second band of optical amplifiers. The control device is specifically configured to send a first inclination adjustment value to an optical amplifier in a first wavelength band in the optical fiber line, and send a second inclination adjustment value to an optical amplifier in a second wavelength band in the optical fiber line. The first inclination adjustment value is used for adjusting the gain inclination of the optical amplifier of the first wave band, and the second inclination adjustment value is used for adjusting the gain inclination of the optical amplifier of the second wave band.

In a third aspect, an embodiment of the present application provides a control apparatus. The control device includes a processor, a memory, and a communication interface. The processor and the memory are connected with the communication interface. The processor is configured to perform the network adjustment method according to the first aspect.

The advantageous effects of the third aspect are referred to in the first aspect and are not described here in detail.

In a fourth aspect, embodiments of the present application provide a computer readable storage medium storing a computer program which, when executed, implements the method of the first aspect.

In a fifth aspect, an embodiment of the present application provides a computer program product comprising computer program code which, when run, causes a control device to perform the method of the first aspect described above.

Drawings

Fig. 1 is a schematic structural diagram of an optical transmission network according to an embodiment of the present application;

fig. 2 is a schematic flow chart of a network adjustment method according to an embodiment of the present application;

fig. 3a is a data flow diagram of a network adjustment method according to an embodiment of the present application;

fig. 3b is a schematic diagram of a scenario of a network adjustment method according to an embodiment of the present application;

Fig. 3c is a schematic diagram of another scenario of the network adjustment method according to the embodiment of the present application;

fig. 3d is a schematic diagram of another scenario of the network adjustment method according to the embodiment of the present application;

fig. 4a is a schematic diagram illustrating an effect of the network adjustment method according to the embodiment of the present application;

fig. 4b is a schematic diagram of another effect of the network adjustment method according to the embodiment of the present application;

fig. 5 is another flow chart of a network adjustment method according to an embodiment of the present application;

fig. 6 is a schematic diagram of a connection relationship between devices in an optical transmission network according to an embodiment of the present application;

FIG. 7 is a schematic diagram of a method for determining a total amount of inclination adjustment K according to an embodiment of the present application;

FIG. 8 is a schematic diagram of a method for determining a total amount of inclination adjustment K for a sub-band according to an embodiment of the present application;

FIG. 9 is a schematic diagram of another method for determining a total amount of inclination adjustment K according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a control device according to an embodiment of the present application.

Detailed Description

Embodiments of the present application are described below with reference to the accompanying drawings. As one of ordinary skill in the art can know, with the development of technology and the appearance of new scenes, the technical scheme provided by the embodiment of the application is also applicable to similar technical problems. The terms first, second and the like in the description and in the claims and in the above-described figures, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances and are merely illustrative of the manner in which embodiments of the application have been described in connection with the description of the objects having the same attributes. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of elements is not necessarily limited to those elements, but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. In addition, "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a alone, a and B together, and B alone, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b, or c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or plural.

Some of the proper terms appearing in the embodiments of the present application are explained below:

tilting of optical power: due to some characteristics of the optical fiber (e.g., stimulated raman effect SRS, wavelength dependent loss WDL, etc.), during transmission of the optical signal through the optical fiber, optical signals of different wavelengths are attenuated to different extents, i.e., the extent of variation in optical power of the optical signals of different wavelengths is different. This phenomenon is known as tilting of the optical power caused by the transmission of an optical signal through an optical fiber.

Power gradient: inclination of a fitted curve of the power spectrum of the optical signal.

Attenuation gradient: the optical device may cause attenuation of the optical signal during transmission of the optical signal through the optical device such as an optical fiber. The slope of the fitted curve of the attenuation spectrum of the optical signal between the output of the optical device and the input of the optical device is called attenuation slope.

Gain tilt: the optical device may provide gain to the optical signal during the optical signal passing through the optical device such as an optical amplifier. The slope of the fitted curve of the gain spectrum of the optical signal between the output of the optical device and the input of the optical device is called the gain slope.

Fig. 1 is a schematic structural diagram of an optical transmission network according to an embodiment of the present application. As shown in fig. 1, the optical transmission network 1000 includes an optical fiber line 1100, a first detection device 1200, a second detection device 1300, and a control device 1400. The fiber optic line 1100 includes, among other things, optical amplifiers (optical amplifier, OA) and multi-span optical fibers. The fiber optic line 1100 includes an optical amplifier with an adjustable gain tilt. Alternatively, the optical fiber line 1100 may also include an optical amplifier with non-adjustable gain tilt, which is not limited by the present application.

Wherein the first detecting device 1200 and the second detecting device 1300 are connected to an input end and an output end of the optical fiber line 1100, respectively. Alternatively, the first detecting device 1200 may be directly connected to the input end of the optical fiber line 1100, or may be indirectly connected to the input end through an optical device such as an optical amplifier, which is not limited by the present application. Similarly, the second detecting device 1300 may be directly connected to the output end of the optical fiber line 1100, or may be indirectly connected to the output end of the optical fiber line via an optical device such as an optical amplifier, which is not limited by the present application.

The first detecting device 1200 and the second detecting device 1300 are both connected to the control device 1400, and the control device 1400 is also connected to an optical amplifier on the optical fiber line 1100 to realize communication between the above devices.

Optionally, the optical transmission network 1000 may further include optical devices such as a wavelength selective switch (wavelength selective switch, WSS), a reconfigurable optical add-drop multiplexer (ROADM), and the application is not limited thereto. If the optical transmission network 1000 includes a reconfigurable optical add drop multiplexer ROADM, the ROADM is located outside the whole of the first detection device 1200, the optical fiber line 1100, and the second detection device 1300.

In the optical transmission network shown in fig. 1, an optical signal is transmitted through an optical fiber line 1100, and each of the multi-span optical fibers in the optical fiber line 1100 may have an attenuation tilt, so that the optical power tilt of the optical signal passing through the attenuation tilt. The optical amplifier in the fiber line 1100 may have a gain tilt that may to some extent cancel the optical power tilt imparted by the optical fiber to the optical signal. However, for optical power tilt produced by the optical fiber, the optical amplifier may overcompensate or undercompensation, resulting in a possible change in power tilt between the optical signal at the output of the optical fiber line 1100 and the optical signal at the input. That is, the power spectrum of the optical signal is tilted by the transmission through the optical fiber line 1100, which affects the transmission effect of the optical signal.

In order to solve the above problems, embodiments of the present application provide a network adjustment method, an optical transmission network, and related devices. According to the embodiment of the application, the degree of canceling the optical power inclination of the optical amplifier in the optical fiber circuit is more matched with the degree of generating the optical power inclination of the multi-span optical fiber in the optical fiber circuit by adjusting the gain inclination of the optical amplifier in the optical fiber circuit, so that the change of the power inclination caused by the transmission of the optical signal through the optical fiber circuit is reduced, and the transmission effect of the optical signal is ensured.

Based on the network architecture shown in fig. 1, an embodiment of the present application provides a network adjustment method, which includes:

201. the control device receives the first optical power information from the first detection device and the second optical power information from the second detection device.

The first detection device 1200 may transmit the detected first optical power information to the control unit 1400. Since the first detecting device 1200 is directly or indirectly connected to the input end of the optical fiber line 1100, the first optical power information may reflect the optical power information of the input end of the optical fiber line 1100.

The second detecting device 1300 may transmit the detected second optical power information to the control device 1400. Since the second detecting device 1300 is directly or indirectly connected to the output end of the optical fiber line 1100, the second optical power information may reflect the optical power information of the output end of the optical fiber line 1100.

Accordingly, the control device 1400 may receive the first optical power information from the first detection device 1200 and the second optical power information from the second detection device.

202. The control device determines an inclination adjustment value based on the first optical power information and the second optical power information, the inclination adjustment value being used to adjust a gain inclination of the optical amplifier.

Upon receiving the first optical power information and the second optical power information, the control device 1400 may determine the inclination adjustment value based on the first optical power information and the second optical power information. The slope adjustment value is used to adjust the gain slope of the optical amplifier in the optical fiber line 1100 to reduce the output power spectrum slope of the downstream optical fiber connected to the optical amplifier.

As can be seen from the above, the first optical power information reflects the optical power information of the input end of the optical fiber line 1100, and the second optical power information reflects the optical power information of the output end of the optical fiber line 1100. Accordingly, the control device 1400 may determine a change in optical power of the optical signal between the output end and the input end of the optical fiber line 1100, which is referred to as Δpower in the embodiment of the present application, based on the first optical power information and the second optical power information. From ΔPower, the control device 1400 can determine the slope of the power change imparted to the optical signal by the fiber optic line 1100, referred to as the line slope ΔT in embodiments of the present application. In the embodiment of the present application, Δt is the inclination of the optical power change generated by the entire optical fiber line 1100 for the optical signal passing through after the optical amplifier in the optical fiber line 1100 counteracts the inclination of the optical power generated by the multi-span optical fiber in the optical fiber line 1100.

The control device 1400 may adjust the magnitude of Δt as the value of the total amount K of inclination adjustment of the optical amplifier with adjustable gain inclination in the optical fiber line 1100, so that the optical amplifier in the optical fiber line 1100 better counteracts the inclination of optical power generated by multi-span optical fibers in the optical fiber line 1100, and reduces the degree of excessive counteraction or insufficient counteraction of the optical amplifier. Thereby reducing the change of the power gradient caused by the transmission of the optical signal through the optical fiber line 1100, and improving the transmission effect of the optical signal.

Alternatively, the inclination adjustment amounts K and Δt may not be equal. For example, the control apparatus 1400 may determine the total amount of inclination adjustment to be the sum of Δt and the reserved amount, or the product of Δt and a predetermined coefficient, etc., which is not limited by the present application.

The control device 1400 then determines respective tilt adjustment values for the gain-tilt-adjustable optical amplifiers in the optical fiber line 1100 based on the tilt adjustment total K, which tilt adjustment values are used for the optical amplifiers in the optical fiber line 1100 to adjust the gain tilt. In the present embodiment, the inclination adjustment value is also referred to as Δtilt.

If the fiber line 1100 includes an optical amplifier with an adjustable gain tilt, the control device 1400 may determine the tilt adjustment value of the amplifier as the tilt adjustment total K. If the optical fiber line includes a plurality of gain-tilt-adjustable optical amplifiers, the control apparatus 1400 may allocate a corresponding tilt adjustment value to each gain-tilt-adjustable optical amplifier such that the sum of the gain tilt adjustment values of the plurality of optical amplifiers is equal to or approximately equal to the tilt adjustment total K.

For example, as shown in fig. 3a, the control device 1400 determines Δpower of the optical fiber line 1100 according to the first optical power information I1 and the second optical power information I2, thereby determining a line inclination Δt of the optical fiber line 1100 according to Δpower, then determining a value of the inclination adjustment total K equal to the line inclination Δt, and determining inclination adjustment values Δtilt 1 to Δtilt n of n gain inclination adjustable optical amplifiers in the optical fiber line 1100 according to K. Wherein the sum of Δtilt 1 to Δtilt n is equal to K.

Alternatively, if the optical fiber line includes N optical amplifiers with adjustable gain tilt, the control apparatus 1400 may determine the tilt adjustment amounts of the N optical amplifiers to be K/N. The method for determining the inclination adjustment value by taking the average value can save the resources of the control device 1400 such as calculation power, storage, communication and the like because the calculation process is simple and the inclination adjustment values of the plurality of optical amplifiers are the same.

Alternatively, the control device 1400 may also distribute the inclination adjustment total K to a plurality of gain-inclination-adjustable optical amplifiers in the optical fiber line 1100 according to information of multi-span optical fibers in the optical fiber line 1100. For example, the control device 1400 may determine, according to the length information of each multi-span optical fiber, a weight of an upstream optical amplifier connected to each optical fiber, and assign the total amount of inclination adjustment K to a plurality of optical amplifiers in the optical fiber line 1100 according to the weight, to obtain the inclination adjustment value. For example, as shown in fig. 3a, the optical fiber circuit 1100 includes 3 optical fibers, where each optical fiber is connected to an upstream optical amplifier, and the length ratio of the 3 optical fibers is 2:3:1, then the control device 1400 may determine that the weight of the upstream optical amplifier of the 3 optical fibers is 2:3:1, and distribute the total amount of inclination adjustment K to the upstream optical amplifiers of the 3 optical fibers in a ratio of 2:3:1 according to the weight, so as to obtain inclination adjustment values of the 3 optical amplifiers.

Alternatively, in addition to the length of the optical fiber, the control device 1400 may determine the weight of the optical amplifier based on other information about the multi-span optical fiber in the fiber optic line 1100. For example, the attenuation coefficient, the insertion loss, the loss coefficient, and the like of the optical fiber can be determined, and the present application is not limited thereto.

Alternatively, the control device 1400 may determine the inclination adjustment value of each optical amplifier according to information of the optical amplifier in the optical fiber line 1100, connection relationship between each optical amplifier and the optical fiber, and the like, in addition to information of the multi-span optical fiber.

For example, the control device 1400 may determine the tilt adjustment value based on an adjustable margin of gain tilt of each optical amplifier in the fiber optic line 1100. For example, as shown in fig. 3b, if the total amount of inclination adjustment K determined by the control device 1400 is 10dB, the weight ratio between the 3-span optical fibers in the optical fiber line 1100 is 2:3:5, and the gain inclination adjustable margin of the upstream optical amplifier of the 3-span optical fibers is 1dB, 5dB, and 5dB, respectively. The tilt adjustment values Δtilt allocated to the 3 optical amplifiers should be 2dB, 3dB, 5dB, respectively, according to the weight of the fiber length. However, since the gain tilt adjustable margin of the first optical amplifier is insufficient, the gain tilt adjustment share of the first optical amplifier is added to the second optical amplifier, thereby determining that Δtilt of the 3 optical amplifiers is 1dB, 4dB, 5dB, respectively. Alternatively, for an optical amplifier with insufficient gain tilt adjustable margin, an insufficient tilt adjustment fraction may be added to the upstream optical amplifier, which is not limited by the present application.

For example, as shown in fig. 3c, a plurality of optical amplifiers with adjustable inclination are connected between the optical fibers 1 and 2. The control device 1400 may assign a total tilt adjustment k=10 dB to the upstream optical amplifier of the 3-span optical fiber according to a weight ratio of 2:3:5 between the 3-span optical fibers. Wherein the amount of tilt adjustment of the upstream optical amplifier assigned to the optical fiber 2 is 3dB. Since there are two (OA 2 and OA 3) upstream optical amplifiers of the optical fiber 2, the control apparatus 1400 may allocate the tilt adjustment amounts of 3dB based on the gain tilt adjustable margins of OA2 and OA3, thereby determining the tilt adjustment amounts of OA2 and OA3 to be 2dB and 1dB, respectively.

Alternatively, as shown in fig. 3d, if the gain tilt of the optical amplifier connected between two spans of optical fibers is not adjustable, or the gain tilt adjustable margin is 0 (OA 2 is not adjustable or the adjustable margin is 0), the control device 1400 may perform the distribution of the total tilt adjustment K with respect to the optical fibers 1 and 2 as a whole, and determine the tilt adjustment values of OA1 and OA3 to be 5dB and 5dB.

Alternatively, in the embodiment of the present application, the control device 1400 may also determine the weight allocated to the total amount of inclination adjustment K by the downstream optical amplification of each optical fiber according to the information of the optical fiber, the information of the optical amplifier, the connection relationship between each optical amplifier and the optical fiber, etc. (for example, in the case that the gain inclination of the upstream optical amplifier of the first optical fiber in the optical fiber line 1100 is not adjustable, or there is no gain inclination adjustable allowance, etc.), which is not limited by the present application.

In the embodiment of the present application, the degree of cancellation (gain gradient) of the optical power tilt generated by the upstream optical amplifier of each optical fiber to the optical fiber is determined according to the degree of optical power tilt (attenuation gradient) generated by each optical fiber to the optical signal. As shown in fig. 4a and fig. 4b, moderate offset of the inclination of the optical power is achieved, the inclination degree of the power of the optical fiber output end in the optical fiber line is reduced, and the transmission effect of the optical signals with different wavelengths is ensured.

203. The control device sends a tilt adjustment value to the optical amplifier.

Having determined the tilt adjustment values, the control device 1400 may send respective corresponding tilt adjustment values to the respective optical amplifiers in the fiber optic line 1100. Wherein the slope adjustment value is used to adjust the gain slope of the optical amplifier in the optical fiber line 1100 to reduce the output power spectrum slope of the downstream optical fiber connected to the optical amplifier.

Alternatively, the control device 1400 may send the tilt adjustment value to the optical amplifier in the fiber line 1100 if the tilt adjustment value is greater than or equal to the first threshold. Thereby avoiding frequent adjustment of the gain tilt of the optical amplifier and avoiding causing fluctuations in the optical fiber line 1100 and thus the entire optical transmission network 1000.

Alternatively, instead of passing the first threshold, network fluctuations may be avoided by averaging over a period of time or the like. For example, the control device 1400 may determine an average adjustment value of the tilt adjustment value over the first time period and send the average adjustment value to the optical amplifier in the fiber optic line 1100.

Accordingly, the optical amplifier in the fiber line 1100 receives the tilt adjustment value from the control device 1400, and the gain tilt can be adjusted according to the tilt adjustment value, thereby reducing the output power spectrum tilt of the downstream optical fiber connected to the amplifier.

Optionally, the gain tilt adjustable optical amplifier in the fiber line 1100 includes a variable optical attenuator (variable optical attenuator, VOA) for producing gain tilt for optical signal amplification. The optical amplifier can adjust the gain tilt by adjusting the attenuation value and pump power of the VOA. Typically, the tilt adjustment value is a parameter in an adjustment command received by the optical amplifier, and the optical amplifier may adjust its gain tilt according to the parameter (tilt adjustment value).

Fig. 4a and fig. 4b are schematic diagrams illustrating an effect of the network adjustment method according to the embodiment of the present application. As shown by the dashed lines in fig. 4a and 4b, during transmission of an optical signal through the optical fiber line 1100, the gain tilt of the optical amplifier of the optical fiber line 1100 is not matched with the attenuation tilt of the optical fiber (i.e., the degree to which the optical amplifier counteracts the optical power tilt is not matched with the degree to which the optical fiber generates the power tilt, in fig. 4a, the case of over-counteraction, and in fig. 4b, the case of under-counteraction), resulting in a gradual increase in the optical power tilt, which results in a large difference in the power tilt between the output and input ends of the multi-span optical fiber in the optical fiber line 1100.

As shown by solid lines in fig. 4a and fig. 4b, the embodiment of the present application adjusts the gain gradient of the optical amplifier between the multi-span optical fibers, so that the gain gradient of the optical amplifier is more matched with the attenuation gradient of the optical fibers (i.e., the degree of canceling the optical power gradient of the optical amplifier is more matched with the degree of generating the power gradient of the optical fibers, so as to realize moderate cancellation), and prevent the optical power gradient from increasing gradually, thereby reducing the power gradient difference between the output end and the input end of the multi-span optical fibers in the optical fiber line 1100, and improving the transmission effect of the optical signals.

In the embodiment of the present application, the power of the optical signal may be inclined toward long waves or toward short waves, which is not limited in the present application. For example, the upward power gradient in 4a may indicate the degree to which the optical power is inclined toward the long wave, or may indicate the degree to which the optical power is inclined toward the short wave.

As already described above, the first detection device 1200 may be directly or indirectly connected to the input end of the optical fiber line 1100. If an indirect connection is made, the control device 1400 may determine the optical power information of the input end of the optical fiber line 1100 according to the first optical power information. The second detection device is the same and will not be described in detail here. The network adjustment method in the case of indirect connection will be described below.

As shown in fig. 5, the method includes:

501. the control device receives the network change prompt.

The control device 1400 may receive a network change prompt in the event of a change in the signal path beam in the optical transmission network 1000 or other changes in the optical transmission network 1000. The prompt is used to instruct the control device 1400 to make an adjustment to the optical transport network 1000 to improve network performance.

Alternatively, in addition to receiving the network change prompt, the control device 1400 may trigger the following process of adjusting the network according to other conditions. Such as timing adjustments, etc., as the application is not limited in this regard.

502. The control device issues detection instructions to the first detection device and the second detection device.

The control device 1400 issues detection instructions to the first detection device 1200 and the second detection device 1300. The instruction is for instructing the first detection apparatus 1200 and the second detection apparatus 1300 to acquire the first optical power information and the second optical power information, respectively.

503. The first detection device detects the first optical power information and transmits the first optical power information to the control device.

Alternatively, as shown in fig. 6, the optical fiber line 1100 includes multi-span optical fibers connected in sequence by a plurality of optical amplifiers. The input end of the first optical fiber of the multi-span optical fibers is connected with the output end of the first optical amplifier. The input of the fiber line 1100 may be the input of the first optical amplifier.

It has been described above that the first detection device 1200 may be directly connected or indirectly connected to the input end of the optical fiber line 1100. As shown in fig. 6, in one example of the indirect connection, a first detecting device 1200 is connected to the output terminal of the first optical amplifier, for detecting optical power information of the output terminal of the first optical amplifier, i.e., first optical power information.

Alternatively, the first detecting device 1200 may also be connected to the input end of the first optical amplifier to directly detect the first optical power information of the input end of the optical fiber line 1100, which is not limited by the present application.

After the first detection device 1200 detects the first optical power information, the first optical power information may be transmitted to the control device 1400. Alternatively, the first optical power information may be a first optical power spectrum.

504. The second detection device detects the second optical power information and transmits the second optical power information to the control device.

Alternatively, as shown in fig. 6, the optical fiber line 1100 includes multi-span optical fibers connected in sequence by a plurality of optical amplifiers. The output end of the tail optical fiber in the multi-span optical fiber is connected with the input end of the second optical amplifier. The output of the fiber line 1100 may be the output of a pigtail, i.e., the input of a second optical amplifier.

As already described above, the second detecting device 1300 may be directly connected to the output end of the optical fiber line 1100 or indirectly connected to the output end. As shown in fig. 6, in one example of the indirect connection, a second detecting device 1300 is connected to the output terminal of the second optical amplifier for detecting optical power information of the output terminal of the second optical amplifier, i.e., second optical power information.

Alternatively, the second detecting device 1300 may also be connected to the input end of the second optical amplifier to directly detect the second optical power information of the output end of the optical fiber line 1100, which is not limited by the present application.

After the second detection device 1300 detects the second optical power information, the second optical power information may be transmitted to the control device 1400. Alternatively, the second optical power information may be a second optical power spectrum.

It should be noted that, the embodiment of the present application does not limit the sequence between the step 503 and the step 504. Step 503 may also be performed after step 504 or simultaneously with step 504, which is not limited in this regard by the present application.

505. The control device determines the optical power change between the output end and the input end of the optical fiber line according to the first optical power information and the second optical power information.

As shown in fig. 6, if the first detecting device 1200 is indirectly connected to the input end of the optical fiber line 1100 through the first optical amplifier, the control device 1400 may determine the third optical power spectrum of the input end of the optical fiber line 1100 according to the first optical power spectrum detected by the first detecting device 1200 and the information of the first optical amplifier. And determines the third optical power spectrum as the optical power information at the input end of the fiber optic line 1100. Alternatively, if the first detecting device 1200 is connected to the input end of the optical fiber line 1100 through a plurality of first optical amplifiers, the control device 1400 may determine the third optical power spectrum according to the first optical power spectrum and the information of the plurality of first optical amplifiers.

Alternatively, if the first detecting device 1200 is directly connected to the input end of the optical fiber line 1100, the control device 1400 may determine that the first optical power spectrum detected by the first detecting device 1200 is the optical power information of the input end of the optical fiber line 1100.

As shown in fig. 6, if the second detecting device 1300 is indirectly connected to the output end of the optical fiber line 1100 through the second optical amplifier, the control device 1400 may determine the fourth optical power spectrum of the output end of the optical fiber line 1100 according to the second optical power spectrum detected by the second detecting device 1300 and the information of the second optical amplifier. And determines the fourth optical power spectrum as the optical power information at the output of the fiber optic line 1100. Alternatively, if the second detecting device 1300 is connected to the output end of the optical fiber line 1100 through a plurality of second optical amplifiers, the control device 1400 may determine the fourth optical power spectrum according to the second optical power spectrum and information of the plurality of second optical amplifiers.

Alternatively, if the second detecting device 1300 is directly connected to the output end of the optical fiber line 1100, the control device 1400 may determine that the second optical power spectrum detected by the second detecting device 1300 is the optical power information of the output end of the optical fiber line 1100.

Having determined the optical power information at the input end and the optical power information at the output end of the optical fiber line 1100, the control device 1400 may perform a difference between the optical power information at the output end and the optical power information at the input end of the optical fiber line 1100 to obtain an optical power change between the output end and the input end of the optical fiber line 1100. For example, as shown in fig. 7, the control device 1400 may perform a difference between the optical power spectrum of the output end and the optical power spectrum of the input end of the optical fiber line 1100, so as to obtain an optical power variation spectrum between the output end and the input end of the optical fiber line 1100. The optical power spectrum at the input end of the optical fiber line 1100 may be the first optical power spectrum or the third optical power spectrum, which depends on the connection relationship between the first detection device 1200 and the input end of the optical fiber line 1100. The optical power spectrum at the output end of the optical fiber line 1100 may be the second optical power spectrum or the fourth optical power spectrum, which depends on the connection relationship between the second detecting device 1300 and the output end of the optical fiber line 1100.

506. The control device determines the inclination adjustment value from the optical power variation.

The control device 1400 performs least square fitting on the optical power variation spectrum in fig. 7, resulting in a fitting straight line y=kx+b. The control device 1400 determines the inclination Δt of the power change of the optical fiber line 1100, which is also the line inclination Δt of the optical fiber line 1100, based on the slope k of the fitted line and the following formula.

ΔT＝y _max -y _min ＝k*(λ _max -λ _min )

Wherein k is the slope of the fit line, y _max Fitting a value, y, to the optical power variation at the maximum wavelength in the optical power variation spectrum of FIG. 7 _min The values are fitted for the optical power variation at the minimum wavelength in the optical power variation spectrum of fig. 7. Lambda (lambda) _max For the maximum wavelength, lambda, in the optical power variation spectrum of FIG. 7 _min Is the minimum wavelength in the optical power variation spectrum of fig. 7.

The control device 1400 may determine the total amount of tilt adjustment K based on Δt and then determine the tilt adjustment value for each gain tilt-adjustable optical amplifier in the fiber line 1100 based on K. The process of determining the total amount of inclination adjustment K according to Δt and determining the inclination adjustment value according to K is described in step 202 of the embodiment shown in fig. 2, and will not be described here.

Alternatively, if optical amplifiers of multiple bands are included in the fiber optic line 1100, the optical power variation may be determined in the sub-bands. The following description will be made with reference to two bands, and the first optical power information includes first information of an input optical signal of a first band (i.e., an optical signal input to the input end of the optical fiber line 1100) and second information of an input optical signal of a second band. The second optical power information includes third information of the output optical signal of the first wavelength band (i.e., the optical signal output from the output end of the optical fiber line 1100) and fourth information of the output optical signal of the second wavelength band.

Then, in step 505, the control device 1400 may determine the input optical power spectrum of the first band according to the first information, and determine the input optical power spectrum of the second band according to the second information (the specific determination manner depends on the connection manner between the first detection device 1200 and the input end of the optical fiber line 1100, see the description of the embodiment example of fig. 6 for details, which are not repeated here). The control device 1400 may determine the output optical power spectrum of the first band according to the third information, and determine the output optical power spectrum of the second band according to the fourth information (the specific determination manner depends on the connection manner between the second detecting device 1300 and the output end of the optical fiber line 1100, see the description of the embodiment of fig. 6, which is not repeated here). Thus, the control device 1400 can obtain the input optical power spectrum and the output optical power spectrum of the two bands as shown in fig. 8.

The control device 1400 obtains the optical power variation spectrum of the first band by differentiating the optical power spectrum of the output end of the first band from the optical power spectrum of the input end of the first band, and obtains the optical power variation spectrum of the second band by differentiating the optical power spectrum of the output end of the second band from the optical power spectrum of the input end of the second band.

In step 506, the control device 1400 may perform least square fitting on the optical power variation spectrums of the two bands, to obtain fitting straight lines of the two bands, further determine the line inclination Δt of the optical fiber line 1100 of the two bands, and determine the total amount of inclination adjustment K of the two bands according to the Δt, thereby determining the inclination adjustment values of the optical amplifiers of the first band and the second band in the optical fiber line 1100.

Steps 505 and 506 are processes of determining a line inclination Δt of the optical fiber line 1100 from the first optical power information and the second optical power information, and determining K from Δt, thereby determining an inclination adjustment value. The inclination adjustment value may be determined in other ways than by steps 505 and 506.

For example, as shown in fig. 9, the control device 1400 may determine a fitting straight line of the optical power spectrum of the input end (the slope of the straight line is k 1) from the optical power spectrum of the input end, and determine a fitting straight line of the optical power spectrum of the output end (the slope of the straight line is k 2) from the optical power spectrum of the output end. The control device 1400 may determine the line inclination Δt=k2-k 1 of the optical fiber line 1100. Further, K is determined according to Δt, and the inclination adjustment value is determined according to K, which will not be described here. In the embodiment of the present application, k1 is also referred to as a first optical power gradient, k2 is also referred to as a second optical power gradient, and Δt=k2-k 1 is also referred to as an optical power gradient change.

Alternatively, the control device 1400 may determine the amount of change Δt of the optical fiber line inclination according to the first optical power information and the second optical power information by means of machine learning, numerical calculation, or the like, and further determine K according to Δt, and determine the inclination adjustment value according to K, which is not limited in the present application.

Alternatively, in determining the optical fiber line inclination change Δt by Δt=k2-k 1, machine learning, numerical calculation, or the like, the line inclination Δt of the optical fiber line 1100 of different wavelength bands may be determined by calculating in a sub-band manner.

507. In the event that the control device determines that the tilt adjustment value is greater than or equal to the first threshold value, the control device sends the tilt adjustment value to an optical amplifier in the fiber line.

In order to avoid frequent adjustments of the network, to ensure stability of the network, the control device 1400 sends the inclination adjustment value to the optical amplifier in the optical fiber line 1100 if it is determined that the inclination adjustment value is greater than or equal to the first threshold value.

Alternatively, if the inclination adjustment value has a plurality of values, it may be determined whether to send the inclination adjustment value to the optical amplifier by using a maximum value, a minimum value, a median value, or the like of the plurality of inclination adjustment values as a parameter to be compared with the first threshold value. For example, taking the maximum value as an example, if the control device 1400 determines that the maximum value of the plurality of inclination adjustment values is greater than or equal to the first threshold value, the plurality of inclination adjustment values determined in the foregoing step may be sent to the corresponding optical amplifier in the optical fiber line 1100.

Optionally, if the inclination adjustment value determined in the foregoing step is in a sub-band, the control device 1400 sends the inclination adjustment value of the corresponding band to the optical amplifiers of different bands in the optical fiber line 1100. Taking two bands as an example, the control device 1400 sends a first band of tilt adjustment values (first tilt adjustment values) to a first band of optical amplifiers in the fiber optic line 1100 and a second band of tilt adjustment values (second tilt adjustment values) to a second band of optical amplifiers in the fiber optic line 1100.

Alternatively, the direction of the inclination adjustment value (to tilt the power toward the long wave or toward the short wave) may be the same or different between the plurality of bands, which is not limited by the present application.

After the control device 1400 sends the inclination adjustment value to the optical amplifier, the optical amplifier adjusts the gain inclination according to the inclination adjustment value, so as to implement the adjustment of the optical transmission network 1000. After step 507 is performed, the control device 1400 may perform steps 503 to 506 again until it is determined that the inclination adjustment value is smaller than the first threshold (indicating that the inclination change between the output end and the input end of the optical fiber line 1100 is smaller, the attenuation difference of the optical power occurring when the optical signals with different wavelengths are transmitted through the optical fiber line 1100 is smaller, and the transmission effect of the optical signals is better).

508. And under the condition that the inclination adjustment value is smaller than the first threshold value, the control equipment performs equalization and/or adjustment of the optical transmission network.

Alternatively, in a case where the control apparatus 1400 determines that the inclination adjustment value is smaller than the first threshold value, the control apparatus 1400 may perform operations such as equalization, adjustment, and the like of the optical transmission network 1000. Since the equalization or adjustment does not substantially affect the amount of change in the inclination of the input/output end of the optical fiber line, the inclination of the network may be in a good state after the adjustment in step 508.

Alternatively, instead of determining whether to send the inclination adjustment value to the optical amplifier in the optical fiber line according to the magnitude of the inclination adjustment value, to avoid network fluctuations caused by frequent network adjustment, the present application is not limited to this, and may also determine the magnitude of the line inclination Δt or the total amount of inclination adjustment K determined in step 506.

The embodiment of the application also provides an optical transmission network, which has the structure shown in fig. 1. The control device 1400 in the network is configured to perform actions performed by the control device in the network adjustment method shown in any one of the embodiments in fig. 2 to 9, so as to implement the network adjustment method in any one of the embodiments in fig. 2 to 9.

In the optical transmission network, the connection relationship between the first detecting device 1200 and the input end of the optical fiber line 1100 and the connection relationship between the second detecting device 1300 and the output end of the optical fiber line 1100 are referred to in the description of the embodiment shown in fig. 6, and are not repeated here.

As shown in fig. 10, the embodiment of the present application further provides a control apparatus 100. The control device 100 comprises a processor 110, a memory 120 and a communication interface 130. The processor 110 and the memory 120 are connected to the communication interface 130. The processor 110 is configured to perform the network adjustment method shown in any of the embodiments of fig. 2 to 9.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.

In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a random access memory (random access memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

Claims

1. A network adjustment method, wherein the method is applied to a control device, the method comprising:

receiving first optical power information from a first detection device and second optical power information from a second detection device; the first detection device and the second detection device are respectively connected with an input end and an output end of an optical fiber circuit, and the optical fiber circuit comprises a multi-span optical fiber and an optical amplifier;

determining an inclination adjustment value according to the first optical power information and the second optical power information, wherein the inclination adjustment value is used for adjusting the gain inclination of the optical amplifier;

the tilt adjustment value is sent to the optical amplifier.

2. The method of claim 1, wherein the fiber optic line comprises a plurality of optical amplifiers;

the determining the inclination adjustment value according to the first optical power information and the second optical power information comprises:

determining the total inclination adjustment amount of the optical fiber line according to the first optical power information and the second optical power information;

determining respective inclination adjustment values of the plurality of optical amplifiers according to the inclination adjustment total amount, wherein the inclination adjustment values are used for adjusting gain inclination of the plurality of optical amplifiers;

The transmitting the tilt adjustment value to the optical amplifier comprises:

and respectively sending corresponding inclination adjustment values to the plurality of optical amplifiers.

3. The method of claim 2, wherein the total amount of tilt adjustments is K, and the fiber optic line includes N optical amplifiers; wherein N is an integer greater than 0;

the determining the respective inclination adjustment values of the plurality of optical amplifiers according to the inclination adjustment total amount includes:

and determining the inclination adjustment value of each of the N optical amplifiers as k/N.

4. The method of claim 2, wherein the fiber optic line comprises a multi-span fiber connected in sequence by a plurality of optical amplifiers;

and determining the respective inclination adjustment values of the plurality of optical amplifiers according to the inclination adjustment total amount and the information of the multi-span optical fibers.

5. The method according to any one of claims 1 to 4, wherein the first optical power information comprises a first optical power spectrum of the first detection device;

Determining a third optical power spectrum of the input end of the optical fiber line according to the first optical power spectrum;

and determining the inclination adjustment value according to the third optical power spectrum and the second optical power information.

6. The method of claim 5, the optical fiber circuit comprising a plurality of optical fibers connected in sequence by an optical amplifier, an input end of a first optical fiber of the plurality of optical fibers being connected to an output end of a first optical amplifier, the first detection device being configured to detect the first optical power spectrum of the output end of the first optical amplifier;

the determining a third optical power spectrum of the input end of the optical fiber line according to the first optical power spectrum includes:

determining the third optical power spectrum of the input end of the optical fiber line according to the first optical power spectrum and the information of the first optical amplifier; the input end of the optical fiber circuit is the input end of the first optical amplifier.

7. The method according to any one of claims 1 to 6, wherein the sending the tilt adjustment value to the optical amplifier comprises:

and determining an average adjustment value of the inclination adjustment value in a first duration, and sending the average adjustment value to the optical amplifier.

8. The method of any one of claims 1 to 7, wherein the first optical power information comprises first information of an input optical signal of a first wavelength band and second information of an input optical signal of a second wavelength band, the second optical power information comprising third information of an output optical signal of the first wavelength band and fourth information of an output optical signal of the second wavelength band;

determining a first inclination adjustment value according to the first information and the third information, wherein the first inclination adjustment value is used for adjusting the gain inclination of the optical amplifier of the first wave band on the optical fiber line;

determining a second inclination adjustment value according to the second information and the fourth information, wherein the second inclination adjustment value is used for adjusting the gain inclination of the optical amplifier of the second wave band on the optical fiber line;

the transmitting the tilt adjustment value to the optical amplifier comprises:

and sending the first inclination adjustment value to the optical amplifier of the first wave band, and sending the second inclination adjustment value to the optical amplifier of the second wave band.

9. The method according to any one of claims 2 to 8, wherein said determining a total amount of tilt adjustment of the optical fiber line from the first optical power information and the second optical power information comprises:

determining the optical power change between the output end and the input end of the optical fiber line according to the first optical power information and the second optical power information;

and determining the total inclination adjustment amount as the inclination of the optical power change.

10. The method according to any one of claims 2 to 8, wherein said determining a total amount of tilt adjustment of the optical fiber line from the first optical power information and the second optical power information comprises:

determining a first optical power gradient of an input end of the optical fiber line according to the first optical power information;

determining a second optical power gradient of the output end of the optical fiber line according to the second optical power information;

determining the total amount of tilt adjustment as an optical power tilt change between the first optical power tilt and the second optical power tilt.

11. An optical transmission network, comprising:

an optical fiber line comprising a multi-span optical fiber and an optical amplifier;

A first detection device for transmitting first optical power information to the control device;

a second detection device for detecting second optical power information to the control device; the first detection device and the second detection device are respectively connected with the input end and the output end of the optical fiber line;

the control device is configured to receive the first optical power information and the second optical power information, and send an inclination adjustment value to the optical amplifier according to the first optical power information and the second optical power information;

the optical amplifier is used for adjusting the gain gradient according to the gradient.

12. The network of claim 11, wherein the fiber optic line comprises a plurality of optical amplifiers;

the control device is specifically configured to: and respectively sending corresponding inclination adjustment values to the plurality of optical amplifiers.

13. The network of claim 12, wherein the fiber optic line comprises N optical amplifiers, N being an integer greater than 0;

the control device is specifically configured to: respectively sending inclination adjustment values with the same size to the N optical amplifiers, wherein the inclination adjustment values are k/N; wherein K is the total inclination adjustment amount of the optical fiber circuit.

14. The network of any one of claims 11 to 13, wherein the optical fiber line comprises multi-span optical fibers connected in sequence by optical amplifiers;

the input end of a first optical fiber in the multi-span optical fibers is connected with the output end of a first optical amplifier, and the first detection equipment is used for detecting the first optical power information of the output end of the first optical amplifier.

15. The network of any one of claims 11 to 14, wherein the optical fiber line comprises multi-span optical fibers connected in sequence by optical amplifiers;

the output end of the tail optical fiber in the multi-span optical fiber is connected with the input end of a second optical amplifier, and the second detection equipment is used for detecting the second optical power information of the output end of the second optical amplifier.

16. The network of any one of claims 11 to 15, wherein the optical fiber line comprises a first band of optical amplifiers and a second band of optical amplifiers;

the control device is specifically configured to:

transmitting a first inclination adjustment value to the optical amplifier of the first wave band and transmitting a second inclination adjustment value to the optical amplifier of the second wave band; the first inclination adjustment value is used for adjusting the gain inclination of the optical amplifier of the first wave band, and the second inclination adjustment value is used for adjusting the gain inclination of the optical amplifier of the second wave band.

17. A control apparatus, characterized by comprising: a processor, a memory, and a communication interface;

the processor and the memory are connected with the communication interface;

the processor is configured to perform the method of any one of claims 1 to 10.

18. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program which, when run, implements the method according to any one of claims 1 to 10.

19. A computer program product, the computer program product comprising: computer program code which, when executed, implements the method according to any of claims 1 to 10.