CN114124214B - Optical fiber transmission optimization method and device, electronic equipment and storage medium - Google Patents

Optical fiber transmission optimization method and device, electronic equipment and storage medium Download PDF

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CN114124214B
CN114124214B CN202111387957.2A CN202111387957A CN114124214B CN 114124214 B CN114124214 B CN 114124214B CN 202111387957 A CN202111387957 A CN 202111387957A CN 114124214 B CN114124214 B CN 114124214B
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transmission
optical fiber
transmission model
target
optical
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CN114124214A (en
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焦明涛
陈文雄
郑波
钟志刚
张传熙
刘刚
李乐坚
乔月强
刘烽博
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China United Network Communications Group Co Ltd
China Information Technology Designing and Consulting Institute Co Ltd
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China United Network Communications Group Co Ltd
China Information Technology Designing and Consulting Institute Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
    • H04B10/0795—Performance monitoring; Measurement of transmission parameters
    • H04B10/07953—Monitoring or measuring OSNR, BER or Q

Abstract

The invention provides an optical fiber transmission optimization method, an optical fiber transmission optimization device, electronic equipment and a storage medium, relates to the technical field of communication, and solves the technical problems that in the prior art, deployment of an optical amplifier station in a fixed length can reduce the performance level of an optical fiber transmission system and influence the optical signal transmission of the optical fiber transmission system. The method comprises the following steps: acquiring the total length of the optical fiber transmission system; dividing the optical fiber transmission system based on the number of the multiple spans to respectively obtain a plurality of transmission models corresponding to the optical fiber transmission model and the span information of the transmission models; determining a target OSNR for each of the plurality of transmission models; determining a transmission model with a maximum target OSNR among the at least one transmission model as a target transmission model when the target OSNR of at least one transmission model among the plurality of transmission models is greater than or equal to an OSNR threshold; and determining the single span length corresponding to the target transmission model as the target length.

Description

Optical fiber transmission optimization method and device, electronic equipment and storage medium
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for optimizing optical fiber transmission, an electronic device, and a storage medium.
Background
In existing optical fiber transmission systems, a fixed length (e.g., 80 kilometers) is typically set as the distance between two optical drop stations. Specifically, after passing through an optical amplifier station, the optical signal may be amplified by a device (e.g., an optical amplifying device or an optical amplifier) included in the optical amplifier station to ensure the power of the optical signal.
However, the type of optical fiber used in different optical fiber transmission systems may be different, and the devices (specifically, the amplification degree of the devices) included in different optical amplifier stations may be different, so that if the optical amplifier stations are still deployed at the fixed length, the performance level of the optical fiber transmission system may be reduced, and the optical fiber transmission system may transmit optical signals.
Disclosure of Invention
The invention provides an optical fiber transmission optimization method, an optical fiber transmission optimization device, electronic equipment and a storage medium, and solves the technical problems that in the prior art, deployment of an optical amplifier station in a fixed length may reduce the performance level of an optical fiber transmission system and influence the optical signal transmission of the optical fiber transmission system.
In a first aspect, the present invention provides an optical fiber transmission optimization method, including: acquiring the total length of an optical fiber transmission system; dividing the optical fiber transmission system based on multiple span numbers to respectively obtain multiple transmission models corresponding to the optical fiber transmission models and span information of the transmission models, wherein the span information of one transmission model comprises the span number corresponding to the transmission model and the length of each span included by the transmission model, and the length of each span is the ratio of the total length to the span number corresponding to the transmission model; determining a target Optical Signal Noise Ratio (OSNR) for each of the plurality of transmission models; determining a transmission model with a maximum target OSNR among the at least one transmission model as a target transmission model when the target OSNR of at least one transmission model among the plurality of transmission models is greater than or equal to an OSNR threshold; and determining the single span length corresponding to the target transmission model as a target length, wherein the single span length is the length of each span included by the target transmission model, and the target length is used for optimizing the optical fiber transmission system.
In a second aspect, the present invention provides an optical fiber transmission optimizing apparatus, including: the device comprises an acquisition module, a processing module and a determination module; the acquisition module is used for acquiring the total length of the optical fiber transmission system; the processing module is configured to divide the optical fiber transmission system based on multiple span numbers to obtain multiple transmission models corresponding to the optical fiber transmission model and respective span information of the multiple transmission models, respectively, where the span information of one transmission model includes the span number corresponding to the transmission model and a length of each span included in the transmission model, and the length of each span is a ratio of the total length to the span number corresponding to the transmission model; the determining module is configured to determine a target OSNR for each of the plurality of transmission models; the determining module is further configured to determine a transmission model with a maximum target OSNR among the at least one transmission model as a target transmission model when the target OSNR of at least one transmission model among the plurality of transmission models is greater than or equal to an OSNR threshold; the determining module is further configured to determine a single span length corresponding to the target transmission model as a target length, where the single span length is a length of each span included in the target transmission model, and the target length is used to optimize the optical fiber transmission system.
In a third aspect, the present invention provides an electronic device comprising: a processor and a memory configured to store processor-executable instructions; wherein the processor is configured to execute the instructions to implement any one of the above-described first aspect, optionally the optical fiber transmission optimization method.
In a fourth aspect, the present invention provides a computer-readable storage medium having instructions stored thereon, which, when executed by an electronic device, enable the electronic device to perform any one of the above-mentioned methods for optionally optimizing optical fiber transmission of the first aspect.
According to the optical fiber transmission optimization method, the optical fiber transmission optimization device, the electronic equipment and the storage medium, the electronic equipment can acquire the total length of an optical fiber transmission system, and divide the optical fiber transmission system based on multiple span sections to respectively obtain multiple transmission models corresponding to the optical fiber transmission models and the span section information of the multiple transmission models; the electronic device may then determine a target OSNR for each of the plurality of transmission models; because the OSNR threshold may represent a performance requirement level of the optical fiber transmission system for transmitting the optical signal, when a target OSNR of at least one transmission model in the plurality of transmission models is greater than or equal to the OSNR threshold, it indicates that the at least one transmission model can meet the performance requirement level, and the electronic device may select, as the target transmission model, a transmission model with a maximum target OSNR from the at least one transmission model with a target OSNR greater than or equal to the OSNR threshold, that is, a transmission model with an optimal performance level, and further optimize the optical fiber transmission system according to the target transmission model (specifically, a single span length corresponding to the target transmission model), which can improve the performance level of the optical fiber transmission system and effectively ensure optical signal transmission.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below.
Fig. 1 is a hardware schematic diagram of an electronic device according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of an optical fiber transmission optimization method according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of an optical fiber transmission optimization method according to an embodiment of the present invention;
fig. 4 is a schematic flowchart of another optical fiber transmission optimization method according to an embodiment of the present invention;
fig. 5 is a schematic flow chart of another optical fiber transmission optimization method according to an embodiment of the present invention;
fig. 6 is a schematic flow chart of an optical fiber transmission optimization method according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an optical fiber transmission optimization apparatus according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of another optical fiber transmission optimization device according to an embodiment of the present invention.
Detailed Description
The following describes in detail an optical fiber transmission optimization method, an apparatus, an electronic device, and a storage medium according to embodiments of the present invention with reference to the accompanying drawings.
The terms "first" and "second", etc. in the description and drawings of the present application are used for distinguishing between different objects and not for describing a particular order of the objects.
Furthermore, the terms "including" and "having," and any variations thereof, as referred to in the description of the present application, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that, in the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present relevant concepts in a concrete fashion.
The term "and/or" as used herein includes the use of either or both of the two methods.
In the description of the present application, the meaning of "a plurality" means two or more unless otherwise specified.
Based on the description in the background art, since the optical amplifier stations are deployed in a fixed length in the prior art, the performance level of the optical fiber transmission system may be reduced, and the optical signal transmission of the optical fiber transmission system is affected. Based on this, embodiments of the present invention provide an optical fiber transmission optimization method, an apparatus, an electronic device, and a storage medium, where the electronic device may select, from at least one transmission model whose target OSNR is greater than or equal to an OSNR threshold, a transmission model whose target OSNR is the largest, that is, whose performance level is optimal, as a target transmission model, and then optimize the optical fiber transmission system according to the target transmission model (specifically, a single span length corresponding to the target transmission model), so that the performance level of the optical fiber transmission system can be improved, and optical signal transmission is effectively ensured.
It should be noted that the electronic device in the embodiment of the present invention may be a mobile phone, a tablet computer, a desktop computer, a laptop computer, a handheld computer, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, a cellular phone, a Personal Digital Assistant (PDA), an Augmented Reality (AR) \ Virtual Reality (VR) device, and other devices that can be installed and used in a content community application, and may also be a server, and the application does not specially limit the specific form of the electronic device. The system can be used for man-machine interaction with a user through one or more modes of a keyboard, a touch pad, a touch screen, a remote controller, voice interaction or handwriting equipment and the like.
Fig. 1 is a schematic diagram of a hardware structure of an electronic device according to an embodiment of the present invention. As shown in fig. 1, the electronic device 10 includes a processor 101, a memory 102, a network interface 103, and the like.
The processor 101 is a core component of the electronic device 10, and the processor 101 is configured to run an operating system of the electronic device 10 and application programs (including a system application program and a third-party application program) on the electronic device 10, so as to implement the method for optimizing optical fiber transmission by the electronic device 10.
In an embodiment of the present invention, the processor 101 may be a Central Processing Unit (CPU), a microprocessor, a Digital Signal Processor (DSP), an application-specific integrated circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, transistor logic, hardware component, or any combination thereof, which is capable of implementing or executing various exemplary logic blocks, modules, and circuits described in connection with the disclosure of an embodiment of the present invention; a processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, a DSP and a microprocessor, or the like.
Optionally, the processor 101 of the electronic device 10 includes one or more CPUs, which are single-core CPUs (single-CPUs) or multi-core CPUs (multi-CPUs).
The memory 102 includes, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical memory, or the like. The memory 102 stores the code of the operating system.
Optionally, the processor 101 reads instructions stored in the memory 102 to implement the optical fiber transmission optimization method in the embodiment of the present invention, or the processor 101 implements the optical fiber transmission optimization method provided in the embodiment of the present invention through instructions stored inside. In the case that the processor 101 implements the optical fiber transmission optimization method provided by the embodiment of the present invention by reading the execution saved in the memory, the memory stores instructions for implementing the optical fiber transmission optimization method provided by the embodiment of the present invention.
The network interface 103 is a wired interface, such as a Fiber Distributed Data Interface (FDDI) interface, gigabit Ethernet (GE) interface. Alternatively, the network interface 103 is a wireless interface. The network interface 103 is used for the electronic device 10 to communicate with other devices.
The memory 102 is used for storing span information of each of a plurality of transmission models. The at least one processor 101 further executes the method described in the embodiments of the present invention according to the span information of each of the plurality of transmission models stored in the memory 102. For more details of the above functions implemented by the processor 101, reference is made to the following description of various method embodiments.
Optionally, the electronic device 10 further includes a bus, and the processor 101 and the memory 102 are connected to each other through the bus 104, or are connected to each other in other manners.
Optionally, the electronic device 10 further includes an input/output interface 105, and the input/output interface 105 is configured to connect with an input device and receive a fiber transmission optimization request input by a user through the input device. Input devices include, but are not limited to, a keyboard, a touch screen, a microphone, and the like. The input/output interface 105 is also used for connecting with an output device, and outputting the optimized result (i.e. determining the target length) of the optical fiber transmission of the processor 101. Output devices include, but are not limited to, displays, printers, and the like.
The optical fiber transmission optimization method, the optical fiber transmission optimization device, the electronic equipment and the storage medium provided by the embodiment of the invention are applied to a scene of optimizing a certain optical fiber transmission system. Specifically, the electronic device may determine a reasonable and effective target length, specifically a length between two optical amplifier stations, for the optical fiber transmission system based on the optical fiber transmission optimization method provided by the embodiment of the present invention, and then deploy the optical amplifier stations based on the target length. In the embodiment of the present invention, the electronic device may select, as the target transmission model, the transmission model with the maximum target OSNR, that is, the optimal performance level from the at least one transmission model with the target OSNR greater than or equal to the OSNR threshold, and further optimize the optical fiber transmission system according to the target transmission model (specifically, the single span length corresponding to the target transmission model), so that the performance level of the optical fiber transmission system can be improved, and optical signal transmission is effectively ensured.
As shown in fig. 2, the optical fiber transmission optimization method provided by the embodiment of the present invention may include S101 to S105.
S101, the electronic equipment acquires the total length of the optical fiber transmission system.
It is understood that the total length is the distance between the start and end points of the fiber optic transmission system. The optical fiber transmission system may be understood as a transmission (or communication) system in which an optical fiber connects the starting point and the end point, and an optical signal may be transmitted from the starting point to the end point via the optical fiber transmission system.
For example, suppose the starting point of the fiber optic transmission system is Beijing and the end point of the fiber optic transmission system is Guangzhou. Further, assuming that the distance between Beijing and Guangzhou is 2400km (kilometers), the total length of the optical fiber transmission system is 2400km.
S102, the electronic equipment divides the optical fiber transmission system based on the multiple span sections to respectively obtain multiple transmission models corresponding to the optical fiber transmission system and span section information of the multiple transmission models.
The span information of one transmission model includes the number of spans corresponding to the transmission model and the length of each span included in the transmission model, and the length of each span is the ratio of the total length to the number of spans corresponding to the transmission model.
It should be understood that the number corresponding to each of the plurality of span numbers is used to characterize how many spans the optical fiber transmission system is divided by the electronic device. For example, if the number corresponding to a certain span number is 3, the electronic device divides the optical fiber transmission system into 3 spans based on the span number, and the transmission model corresponding to the 3 spans is one of the transmission models.
It should be noted that the number corresponding to the number of the multiple spans may be 1, 2, 3 \8230 \ 8230: (M ≧ 1), and the number corresponding to the number of the multiple spans is different, that is, the electronic device may divide the optical fiber transmission system into 1 span, 2 spans, 3 spans \8230 \ 8230:and M spans respectively.
It will be appreciated that each of the plurality of transmission models described above may include at least one span. The electronic device divides the optical fiber transmission system based on a number of spans, which can also be understood as evenly dividing the total length of the optical fiber transmission system based on a length based on the length of each of at least one span included in the transmission model. At least one span included in one transmission model is each of the same length.
As an example, table 1 below is an example of an electronic device dividing an optical fiber transmission system with a total length of 2400km to obtain 21 transmission models and span information of each of the 21 transmission models in the embodiment of the present invention. As shown in table 1, taking transmission model 1 as an example for explanation, the electronic device may divide the optical fiber transmission system by using the number of spans as 60, to obtain span information of the transmission model 1 and the transmission model 1, specifically, the number of spans corresponding to the transmission model 1 is 60, and the single span length (i.e., the length of each span included in the transmission model 1) is 40.0km. In the embodiment of the present invention, the method for obtaining the other 20 transmission models in table 1 by the electronic device is the same as or similar to the method for obtaining the transmission model 1, and details are not repeated here.
TABLE 1
Transmission model Number of spans Single span length (km)
Transmission model 1 50 48.0
Transmission model 2 49 49.0
Transmission model 3 48 50.0
Transmission model 4 47 51.1
Transmission model 5 46 52.2
Transmission model 6 45 53.3
Transmission model 7 44 54.5
Transmission model 8 43 55.8
Transmission model 9 42 57.1
Transmission model 10 41 58.5
Transmission model 11 40 60.0
Transmission model 12 39 61.5
Transmission model 13 38 63.2
Transmission model 14 37 64.9
Transmission model 15 36 66.7
Transmission model 16 35 68.6
Transmission model 17 34 70.6
Transmission model 18 33 72.7
Transmission model 19 32 75.0
Transmission model 20 31 77.4
Transmission model 21 30 80.0
It should be noted that table 1 above is only an example of dividing the optical fiber transmission model by the electronic device in the embodiment of the present invention. In this embodiment of the present invention, the electronic device may further divide the optical fiber transmission model into a transmission model composed of more spans (for example, 60 spans), or divide the optical fiber transmission model into a transmission model composed of fewer spans (for example, 20 spans). The number of spans included in the transmission model is not specifically limited in the embodiments of the present invention.
S103, the electronic device determines the target OSNR of each of the plurality of transmission models.
It should be understood that the target OSNR of a transmission model is used to characterize the performance level of the transmission model for transmitting optical signals. The electronic device may determine a target OSNR for each of the plurality of transmission models, and then determine whether the target OSNR for each of the plurality of transmission models meets the performance requirement level of the optical fiber transmission system.
And S104, when the target OSNR of at least one transmission model in the plurality of transmission models is larger than or equal to the OSNR threshold value, the electronic device determines the transmission model with the maximum target OSNR in the at least one transmission model as the target transmission model.
It is understood that the OSNR threshold is the level of performance requirement of the optical fiber transmission system. When the target OSNR of at least one of the plurality of transmission models is greater than or equal to the OSNR threshold, it indicates that the performance level of the at least one transmission model transmitting the optical signal satisfies the performance requirement level of the optical fiber transmission system (specifically, the performance requirement level of the optical fiber transmission system transmitting the optical signal). In this way, the electronic device may determine, as a target transmission model, a transmission model with the maximum target OSNR in the at least one transmission model, that is, a transmission model with the optimal performance level of transmitting the optical signal in the at least one transmission model, and then configure (or optimize) the optical fiber transmission system based on the span information of the target transmission model.
S105, the electronic equipment determines the single span length corresponding to the target transmission model as the target length.
Wherein the single span length is a length of each span included in the target transmission model, and the target length is used for optimizing the optical fiber transmission system.
It should be understood that the target length is used for optimizing the optical fiber transmission system, and means that the total length of the optical fiber transmission system can be divided by taking the target length as a preset step length to obtain the same optical fiber transmission system as the target transmission model, and the distance between two adjacent optical stations in the optical fiber transmission system is the target length.
The technical scheme provided by the embodiment can at least bring the following beneficial effects: from S101 to S105, the electronic device may obtain the total length of the optical fiber transmission system, and divide the optical fiber transmission system based on the number of multiple spans, to obtain multiple transmission models corresponding to the optical fiber transmission model and span information of the multiple transmission models, respectively; the electronic device may then determine a target OSNR for each of the plurality of transmission models; because the OSNR threshold may represent a performance requirement level of the optical fiber transmission system for transmitting the optical signal, when a target OSNR of at least one transmission model in the plurality of transmission models is greater than or equal to the OSNR threshold, it is indicated that the at least one transmission model can meet the performance requirement level, the electronic device may select, as the target transmission model, a transmission model with a maximum target OSNR from the at least one transmission model with a target OSNR greater than or equal to the OSNR threshold, that is, the transmission model with an optimal performance level, and further optimize the optical fiber transmission system according to the target transmission model (specifically, a single span length corresponding to the target transmission model), so that the performance level of the optical fiber transmission system can be improved, and the optical signal transmission is effectively ensured.
Referring to fig. 2, as shown in fig. 3, the optical fiber transmission optimization method provided by the present invention further includes S106-S108.
S106, the electronic equipment obtains initial optical power of the optical fiber transmission system and optical attenuation coefficients of the optical fiber transmission system.
It should be understood that the initial optical power is the optical power input at the origin of the fiber optic transmission system. The optical attenuation coefficient is related to the type of optical fiber included in (or used in) the fiber transmission system, and may be, for example, 0.20dB/km when the type of optical fiber is g.654e fiber.
S107, the electronic equipment determines the optical fiber attenuation value of each of at least one span section included in the first transmission model according to the optical fiber attenuation coefficient of the optical fiber transmission system and the single span length corresponding to the first transmission model.
Wherein the first transmission model is one of the plurality of transmission models.
In conjunction with the above description of the embodiments, it should be understood that a transmission model (e.g. the first transmission model) includes at least one span, each of which has the same length, and the length of each span is the single span length corresponding to the first transmission model.
In this embodiment of the present invention, for each span, the electronic device may determine, as an optical fiber attenuation value of each span, a product of an optical fiber attenuation coefficient and a single span length corresponding to the first transmission model.
S108, the electronic equipment determines the gain value of each of the plurality of optical amplifiers corresponding to the first transmission model and the noise coefficient of each of the plurality of optical amplifiers.
It will be appreciated that for a transmission model (e.g. the first transmission model) each optical amplifier may be deployed in each optical station that the first transmission model comprises. Illustratively, if the first transmission model includes 21 optical amplifier stations (it can also be understood that the first transmission model includes 20 spans), the first transmission model corresponds to 21 optical amplifiers.
In one implementation of the embodiments of the present invention, an optical amplifier may include a preamplifier and a power amplifier. The electronic device may acquire the amplification gain of the preamplifier and the amplification gain of the power amplifier included in the optical amplifier, and then determine the sum of the amplification gain of the preamplifier and the amplification gain of the power amplifier as the gain value of the optical amplifier.
For example, assuming that the amplification gain of the preamplifier is 14dB (decibel) and the amplification gain of the power amplifier is 14dB, the electronics determine the gain value of the optical amplifier to be 28dB.
Optionally, an optical amplifier may further include a variable optical attenuator and a variable optical attenuation value corresponding to the variable optical attenuator. In the embodiment of the present invention, after determining the sum of the amplification gain of the pre-amplifier and the amplification gain of the power amplifier, the electronic device may further subtract the adjustable optical attenuation value to obtain the gain value of the optical amplifier.
In one implementation, for an optical amplifier, the electronics can also obtain a noise figure of a preamplifier included with the optical amplifier and a noise figure of a power amplifier included with the optical amplifier, and determine the noise figure of the optical amplifier in conjunction with an amplification gain of the preamplifier.
Specifically, the electronic device may determine that the noise figure of the first optical amplifier satisfies the following equation:
Figure BDA0003367754410000101
wherein NF is 1 Representing a noise figure of the first optical amplifier, NF, which is one of the optical amplifiers corresponding to the first transmission model 1 ' denotes the noise figure, NF, of the first preamplifier 1 "denotes the noise figure of the first power amplifier, G 1 Indicating the amplification gain of the first preamplifier included in the first optical amplifier, and the first power amplifier included in the first optical amplifier.
Illustratively, if the noise figure of the first preamplifier is 5.5, the noise figure of the first power amplifier is 5.5, and the amplification gain of the first preamplifier is 14, the electronics determine the noise figure of the first optical amplifier to be 5.7.
Continuing with fig. 3, determining a target OSNR for each of the plurality of transmission models comprises S1031-S1032.
And S1031, the electronic device determines a first OSNR of the first transmission model according to the initial optical power, the respective optical fiber attenuation value of at least one span included in the first transmission model, the respective gain value of the plurality of optical amplifiers corresponding to the first transmission model, and the respective noise coefficient of the plurality of optical amplifiers.
In one implementation of the embodiment of the present invention, the electronic device may determine that the first OSNR of the first transmission model satisfies the following formula:
Figure BDA0003367754410000102
wherein, OSNR 1 A first OSNR representing the first transmission model, P representing the initial optical power, A i Representing the attenuation value, G, of the i-th span comprised by the first transmission model i Indicates the gain value, pase, of the ith optical amplifier corresponding to the first transmission model i And the noise power accumulated by N-i sections of optical fibers after the optical signal passes through the ith optical amplifier and N +1-i amplifiers after the ith optical amplifier is represented, wherein N represents the number of spans corresponding to the first transmission model, i is more than or equal to 1, and N is more than or equal to 1.
Figure BDA0003367754410000103
Wherein, pase i Representing the noise power, G, accumulated by the optical signal over the N-i lengths of optical fiber after the ith optical amplifier and over the N +1-i amplifiers after the ith optical amplifier i Denotes a gain value of an ith optical amplifier, NF denotes a noise figure of the ith optical amplifier, A n Represents the fiber attenuation value G of the N-th section of the N-i optical fibers n The gain value of the nth optical amplifier in the N +1-i amplifiers is shown, and N is more than or equal to 1.
S1032, the electronic device determines the first OSNR of the first transmission model as a target OSNR of the first transmission model.
Referring to fig. 3, as shown in fig. 4, the optical fiber transmission optimization method provided by the present application further includes S109.
S109, acquiring a nonlinear degradation influence coefficient of the optical fiber transmission system, a worst-case channel influence coefficient of the optical fiber transmission system and a degradation influence coefficient of an equalizer.
Wherein the worst-channel influence coefficient is used for power amplification of the worst channel of the plurality of channels included in the optical fiber transmission system.
It should be understood that the optical fiber attenuation coefficient (or optical fiber attenuation value) is used to characterize the linear attenuation of the optical signal (specifically, the initial optical power) in the optical fiber transmission system (specifically, in the optical fiber transmission process). In the embodiment of the present invention, other degradation effects may also exist in the transmission process of the optical signal, and the degradation effect may be a new channel that interferes with the original signal, and the degradation effect is not linear, that is, the non-linear degradation effect coefficient.
It will be appreciated that the optical fiber transmission system may include a plurality of (e.g., 80) channels, and that the gain profile of each channel for the optical signal may be different due to different amplification profiles of different optical amplification devices in the plurality of optical amplification devices included in the optical fiber transmission system (or in a transmission model). In this embodiment of the present invention, the electronic device may determine a worst channel, i.e., a channel with the slowest power amplification rate, from the multiple channels, and then configure an equalizer for the optical fiber transmission system, so as to ensure that the processing levels (i.e., the power amplification rates) of the multiple channels are the same when transmitting optical signals in different channels. When the worst channel is able to pass the optical signal, it is said that each of the plurality of channels can pass the optical signal.
In the embodiment of the present invention, configuring an equalizer may also generate a degradation influence on the optical fiber transmission system, so that the electronic device may obtain a degradation influence coefficient of the equalizer, and further consider the degradation influence coefficient added to the equalizer as a determination condition for obtaining a target OSNR of a certain transmission model (e.g., a first transmission model).
Alternatively, the nonlinear degradation impact coefficient may be 0.001dB/km, the worst-case channel impact coefficient may be 0.0005dB/km, and the degradation impact coefficient for an equalizer may be 0.2dB.
Continuing with fig. 4, the determining of the target OSNR of each of the plurality of transmission models may specifically include S1033 to S1034.
S1033, the electronic device determines a second OSNR of the first transmission model according to the initial optical power of the optical fiber transmission system, the optical fiber attenuation value of each of the at least one span included in the first transmission model, the gain value of each of the plurality of optical amplifiers corresponding to the first transmission model, the noise coefficient of each of the plurality of optical amplifiers, the nonlinear degradation influence coefficient of the optical fiber transmission system, the worst channel influence coefficient, the degradation influence coefficient of the equalizer, the number of equalizers corresponding to the first transmission model, and the total length of the optical fiber transmission system.
It is to be understood that one transmission model may correspond to at least one equalizer, i.e. at least one equalizer may be deployed in the optical fiber transmission system, e.g. one equalizer may be configured every 8 spans.
In one implementation of the embodiment of the invention, the electronic device may determine that the second OSNR of the first transmission model satisfies the following formula:
Figure BDA0003367754410000121
wherein, OSNR 2 A second OSNR representing the first transmission model, P representing the initial optical power, A i Representing the attenuation value, G, of the i-th span comprised by the first transmission model i Indicates the gain value, pase, of the ith optical amplifier corresponding to the first transmission model i The method comprises the steps of representing noise power accumulated by N-i sections of optical fibers after an optical signal passes through the ith optical amplifier and N +1-i amplifiers after the ith optical amplifier, wherein N represents the number of spans corresponding to the first transmission model, L represents the total length, psi represents the nonlinear degradation influence coefficient, theta represents the worst-path influence coefficient, lambda represents the degradation influence coefficient of the equalizer, B represents the number of the equalizers corresponding to the first transmission model, i is more than or equal to 1, N is more than or equal to 1, and B is more than or equal to 1.
Figure BDA0003367754410000122
Wherein, pase i Representing the noise power, G, accumulated by the optical signal over the N-i lengths of optical fiber after the ith optical amplifier and over the N +1-i amplifiers after the ith optical amplifier i Denotes the ithThe gain value of each optical amplifier, NF, the noise figure of the ith optical amplifier, A n Representing the fiber attenuation value, G, of the nth fiber of the N-i fibers n Represents the gain value of the nth optical amplifier in the N +1-i amplifiers, and N is more than or equal to 1.
S1034, the electronic device determines the second OSNR of the first transmission model as a target OSNR of the first transmission model.
In the embodiment of the present invention, in the process of determining a target OSNR (specifically, a second OSNR) of a certain transmission model (for example, a first transmission model), the electronic device relates to a nonlinear degradation effect in an optical fiber transmission system, a power amplification condition of a worst-case channel and a degradation effect of an equalizer on the optical fiber transmission system, and can accurately determine the target OSNR of each transmission model.
For example, in combination with the example in table 1, the following table 2 shows an example of the target OSNR of each of the plurality of transmission models (i.e. the above 21 transmission models) determined by the electronic device. As shown in table 2, specifically, the target OSNR of the transmission model 1 is 13.217, \8230 \ 8230, and the target OSNR of the transmission model 21 is 13.949.
TABLE 2
Figure BDA0003367754410000131
Referring to fig. 2, as shown in fig. 5, the optical fiber transmission optimization method according to the embodiment of the present invention may further include S110.
The electronic device increases the initial optical power of the optical fiber transmission system and/or shortens the overall length of the optical fiber transmission system when the target OSNR for each of the plurality of transmission models is less than the OSNR threshold S110.
It should be understood that when the target OSNR of each of the plurality of transmission models is less than the OSNR threshold, it indicates that each of the plurality of transmission models fails to meet the performance requirement level of the optical fiber transmission system for transmitting the optical signal. When the initial optical power is smaller or the total length is larger, the electronic device may increase the initial optical power and/or shorten the total length to increase the target OSNR of the transmission models.
Optionally, when the target OSNR of each transmission model is less than the OSNR threshold, the electronic device may further adjust a parameter of the optical amplifier corresponding to each transmission model, for example, a gain value of the optical amplifier may be increased, a noise figure of the optical amplifier may be decreased, and the like.
Exemplarily, in combination with the example in table 2, table 3 below is an example in which the electronic device increases the initial optical power of the optical fiber transmission system, specifically, increases the initial optical power from 19dBm (decibel-milliwatt) to 21dBm, and obtains the target OSNR of each of the 21 models. As shown in table 2, specifically, the target OSNR of the transmission model 1 is 15.217, \8230; \8230, and the target OSNR of the transmission model 21 is 15.949.
TABLE 3
Figure BDA0003367754410000151
For example, assuming that the OSNR threshold is 16dB, when the electronic device determines that the transmission model 16-the transmission model 20 is the at least one transmission model, the target OSNR of the transmission model 16 is the maximum, that is, the transmission model 16 is the target transmission model, the single span length corresponding to the target transmission model is 68.6km, and the number of spans corresponding to the target transmission model is 35.
With reference to fig. 2, as shown in fig. 6, the optical fiber transmission optimization method provided in the embodiment of the present invention may further include: S111-S113.
S111, the electronic equipment increases X for the length of each odd span included by the target transmission model, and shortens X for the length of each even span included by the target transmission model to obtain the Xth target transmission model, wherein X is larger than or equal to 1.
It should be understood that the electronic device increases the length of each odd span by X, i.e., increases the length of each odd span; the electronic device shortens the length of each even span by X, i.e. shortens the length of each even span.
Alternatively, the electronic device may also shorten the length of each odd span by X and increase the length of each even span by X, the purpose and function of which are the same or similar to S111 described above.
It should be noted that, in order to ensure that the total length of the target transmission model (which may also be understood as an optical fiber transmission system) remains unchanged, when the number of spans corresponding to the target transmission model is an odd number (e.g. 35), the last span (i.e. the last odd span, the 35 th span) corresponding to the target transmission model may not be processed to increase or decrease the length.
And S112, when the target OSNR of the X-1 th target transmission model is greater than or equal to the OSNR threshold value and the target OSNR of the X-1 th target transmission model is smaller than the OSNR threshold value, the electronic equipment determines that X-1 is the maximum adjustable length corresponding to the target transmission model.
With reference to the above description of the embodiment, it should be understood that when the target OSNR of the X-1 th target transmission model is greater than or equal to the OSNR threshold, it indicates that the X-1 th target transmission model can meet the performance requirement level of the optical fiber transmission system for transmitting the optical signal; when the target OSNR of the xth target transmission model is less than the OSNR threshold, it indicates that the xth target transmission model cannot meet the performance requirement level. In this way, the electronic device may determine that X-1 is the maximum adjustable length corresponding to the target transmission model, that is, the electronic device may increase or decrease the single span length corresponding to the target transmission model by X-1 at most, and may still meet the performance requirement level.
It should be noted that, when X =1, the X-1 (i.e., 0) th target transmission model may be understood as the target transmission model in S104. When the condition satisfied in S112 is X =1, it indicates that the adjustable length corresponding to the target transmission model is 0, and the target OSNR of the target transmission model can meet the performance requirement level only when the single span length corresponding to the target transmission model is unchanged.
For example, in combination with the example in table 3, table 4 below is an example of the electronic device adjusting the single span length corresponding to the target transmission model (specifically, the transmission model 16).
TABLE 4
X Target OSNR (dB)
1 16.16676304
2 16.16255615
3 16.15554381
4 16.14572477
5 16.13309731
6 16.11765925
7 16.09940805
8 16.07834081
9 16.05445437
10 16.02774533
11 15.9982102
12 15.9658454
13 15.9306474
14 15.89261282
15 15.85173848
Assuming that the OSNR threshold is 16dB, the electronic device determines that the maximum adjustable length corresponding to the target transmission model is 10km.
S113, the electronic equipment determines the adjustable range of the optical fiber transmission system based on the maximum adjustable length and the target length corresponding to the target transmission model.
Wherein, the adjustable range is used for representing the adjustment range of the target length.
In conjunction with the above description of the embodiments, it should be understood that the target length is a single span length corresponding to the target transmission model. It is understood that the minimum value of the adjustable range (or the adjustable range) is the difference between the target length and the maximum adjustable length, and the maximum value of the adjustable range is the sum of the target length and the maximum adjustable length. Illustratively, in conjunction with the example in table 4 above, the electronic device determines that the adjustable range is 68.6 ± 10km, specifically, when the single span length corresponding to the optical fiber transmission system belongs to [58.6km,78.6km ], the OSNR corresponding to the optical fiber transmission system can meet the performance requirement level of the optical fiber transmission system for transmitting optical signals.
In the embodiment of the present invention, the electronic device and the like may be divided into functional modules according to the above method examples, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, the division of the modules in the embodiment of the present invention is schematic, and is only one logic function division, and another division manner may be available in actual implementation.
In the case of dividing each functional module by corresponding functions, fig. 7 shows a schematic diagram of a possible structure of the optical fiber transmission optimizing device (i.e., the electronic device) in the above embodiment, and as shown in fig. 7, the optical fiber transmission optimizing device 20 may include: an acquisition module 201, a processing module 202 and a determination module 203.
An obtaining module 201 is configured to obtain a total length of the optical fiber transmission system.
A processing module 202, configured to divide the optical fiber transmission system based on multiple span numbers, and obtain multiple transmission models corresponding to the optical fiber transmission model and span information of the multiple transmission models, respectively, where the span information of one transmission model includes the span number corresponding to the transmission model and a length of each span included in the transmission model, and the length of each span is a ratio of the total length to the span number corresponding to the transmission model.
A determining module 203, configured to determine a target OSNR of each of the plurality of transmission models.
The determining module 203 is further configured to determine a transmission model with the largest target OSNR among the at least one transmission model as the target transmission model when the target OSNR of at least one transmission model among the plurality of transmission models is greater than or equal to the OSNR threshold.
The determining module 203 is further configured to determine a single span length corresponding to the target transmission model as a target length, where the single span length is a length of each span included in the target transmission model, and the target length is used to optimize the optical fiber transmission system.
Optionally, the obtaining module 201 is further configured to obtain an initial optical power of the optical fiber transmission system and an optical fiber attenuation coefficient of the optical fiber transmission system.
The determining module 203 is further configured to determine, according to the optical fiber attenuation coefficient of the optical fiber transmission system and the single span length corresponding to the first transmission model, an optical fiber attenuation value of each of at least one span included in the first transmission model, where the first transmission model is one of the multiple transmission models.
The determining module 203 is further configured to determine a gain value of each of the plurality of optical amplifiers corresponding to the first transmission model and a noise coefficient of each of the plurality of optical amplifiers.
The determining module 203 is specifically configured to determine a first OSNR of the first transmission model according to the initial optical power, a fiber attenuation value of each of at least one span included in the first transmission model, a gain value of each of a plurality of optical amplifiers corresponding to the first transmission model, and a noise coefficient of each of the plurality of optical amplifiers.
The determining module 203 is further specifically configured to determine the first OSNR of the first transmission model as the target OSNR of the first transmission model.
Optionally, the obtaining module 201 is further configured to obtain a nonlinear degradation influence coefficient of the optical fiber transmission system, a worst channel influence coefficient of the optical fiber transmission system, and a degradation influence coefficient of the equalizer, where the worst channel influence coefficient is used to characterize a power amplification condition of a worst channel of multiple channels included in the optical fiber transmission system.
The determining module 203 is further specifically configured to determine a second OSNR of the first transmission model according to the initial optical power, the optical fiber attenuation value of each of the at least one span included in the first transmission model, the gain value of each of the plurality of optical amplifiers corresponding to the first transmission model, the noise coefficient of each of the plurality of optical amplifiers, the nonlinear degradation influence coefficient, the worst channel influence coefficient, the degradation influence coefficient of the equalizer, the number of equalizers corresponding to the first transmission model, and the total length.
The determining module 203 is further specifically configured to determine the second OSNR of the first transmission model as the target OSNR of the first transmission model.
Optionally, the determining module 203 is further specifically configured to determine that the second OSNR of the first transmission model satisfies the following formula:
Figure BDA0003367754410000191
wherein, OSNR 2 A second OSNR representing the first transmission model, P representing the initial optical power, A i A fiber attenuation value G representing the ith span included in the first transmission model i Indicates the gain value, pase, of the ith optical amplifier corresponding to the first transmission model i The method comprises the steps of representing the noise power accumulated by N-i sections of optical fibers after an optical signal passes through the ith optical amplifier and N +1-i amplifiers after the ith optical amplifier, wherein N represents the number of spans corresponding to the first transmission model, L represents the total length, psi represents the nonlinear degradation influence coefficient, theta represents the worst channel influence coefficient, lambda represents the degradation influence coefficient of the equalizer, B represents the number of equalizers corresponding to the first transmission model, i is more than or equal to 1, N is more than or equal to 1, and B is more than or equal to 1.
Figure BDA0003367754410000192
Wherein, pase i Representing the noise power, G, accumulated by the optical signal over the N-i lengths of optical fiber after the ith optical amplifier and over the N +1-i amplifiers after the ith optical amplifier i Denotes a gain value of the ith optical amplifier, NF denotes a noise figure of the ith optical amplifier, A n Representing the fiber attenuation value, G, of the nth fiber of the N-i fibers n Represents the gain value of the nth optical amplifier in the N +1-i amplifiers, and N is more than or equal to 1.
Optionally, the processing module 202 is further configured to increase the initial optical power of the optical fiber transmission system and/or shorten the total length of the optical fiber transmission system when the target OSNR of each of the plurality of transmission models is smaller than the OSNR threshold.
Optionally, the processing module 202 is further configured to increase the length of each odd span included in the target transmission model by X, and shorten the length of each even span included in the target transmission model by X, so as to obtain an xth target transmission model, where X is greater than or equal to 1.
The determining module 203 is further configured to determine X-1 as the maximum adjustable length corresponding to the target transmission model when the target OSNR of the target transmission model of the X-1 th target transmission model is greater than or equal to the OSNR threshold and the target OSNR of the X-th target transmission model is less than the OSNR threshold.
The determining module 203 is further configured to determine an adjustable range of the optical fiber transmission system based on the maximum adjustable length and the target length, where the adjustable range is used to characterize an adjustment range of the target length.
In the case of an integrated unit, fig. 8 shows a schematic diagram of a possible structure of the optical fiber transmission optimization device (i.e., the electronic device) in the above embodiment. As shown in fig. 8, the optical fiber transmission optimizing device 30 may include: a processing module 301 and a communication module 302. The processing module 301 can be used to control and manage the actions of the optical fiber transmission optimizing apparatus 30. The communication module 302 may be used to support communication of the fiber optic transmission optimization device 30 with other entities. Optionally, as shown in fig. 8, the optical fiber transmission optimization device 30 may further include a storage module 303 for storing program codes and data of the optical fiber transmission optimization device 30.
The processing module 301 may be a processor or a controller (e.g., the processor 101 shown in fig. 1). The communication module 302 may be a transceiver, a transceiver circuit, or a communication interface, etc. (e.g., may be the network interface 103 shown in fig. 1 described above). The storage module 303 may be a memory (e.g., may be the memory 102 described above with reference to fig. 1).
When the processing module 301 is a processor, the communication module 302 is a transceiver, and the storage module 303 is a memory, the processor, the transceiver, and the memory may be connected via a bus. The bus may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc.
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.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
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, may be located in one position, or may be distributed on multiple 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.
In the above embodiments, all or part of the implementation may be realized by software, hardware, firmware, or any combination thereof. When implemented using a software program, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions described in accordance with the embodiments of the invention may be carried out in whole or in part when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optics, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or can comprise one or more data storage devices, such as a server, a data center, etc., that can be integrated with the medium. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid State Disk (SSD)), among others.
The above description is only for the specific embodiments 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 the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (14)

1. A method for optimizing optical fiber transmission, comprising:
acquiring the total length of the optical fiber transmission system;
dividing the optical fiber transmission system based on multiple span numbers to obtain multiple transmission models corresponding to the optical fiber transmission system and span information of the transmission models respectively, wherein the span information of one transmission model comprises the span number corresponding to the transmission model and the length of each span included in the transmission model, and the length of each span is a ratio of the total length to the span number corresponding to the transmission model;
determining a target OSNR for each of the plurality of transmission models;
determining a transmission model of the at least one transmission model with a maximum target OSNR as a target transmission model when the target OSNR of the at least one transmission model is greater than or equal to an OSNR threshold;
determining a single span length corresponding to the target transmission model as a target length, where the single span length is a length of each span included in the target transmission model, and the target length is used to optimize the optical fiber transmission system.
2. The method for optimizing optical fiber transmission according to claim 1, further comprising:
acquiring initial optical power of the optical fiber transmission system and an optical fiber attenuation coefficient of the optical fiber transmission system;
determining an optical fiber attenuation value of each of at least one span sections included in a first transmission model according to an optical fiber attenuation coefficient of the optical fiber transmission system and a single span length corresponding to the first transmission model, wherein the first transmission model is one of the plurality of transmission models;
determining respective gain values of a plurality of optical amplifiers corresponding to a first transmission model and respective noise coefficients of the plurality of optical amplifiers;
the determining a target OSNR for each of the plurality of transmission models comprises:
determining a first OSNR of the first transmission model according to the initial optical power, a respective optical fiber attenuation value of at least one span included in the first transmission model, a respective gain value of a plurality of optical amplifiers corresponding to the first transmission model, and a respective noise coefficient of the plurality of optical amplifiers;
determining a first OSNR of the first transmission model as a target OSNR of the first transmission model.
3. The method for optimizing optical fiber transmission according to claim 2, further comprising:
acquiring a nonlinear degradation influence coefficient of the optical fiber transmission system, a worst channel influence coefficient of the optical fiber transmission system and a degradation influence coefficient of an equalizer, wherein the worst channel influence coefficient is used for representing the power amplification condition of the worst channel in a plurality of channels included in the optical fiber transmission system;
the determining a target OSNR for each of the plurality of transmission models further comprises:
determining a second OSNR of the first transmission model according to the initial optical power, a respective optical fiber attenuation value of at least one span included in the first transmission model, a respective gain value of a plurality of optical amplifiers corresponding to the first transmission model, a respective noise coefficient of the plurality of optical amplifiers, the nonlinear degradation influence coefficient, the worst channel influence coefficient, the degradation influence coefficient of the equalizer, the number of equalizers corresponding to the first transmission model, and the total length;
determining a second OSNR of the first transmission model as a target OSNR of the first transmission model.
4. The method according to claim 3, wherein the determining the second OSNR of the first transmission model according to the initial optical power, the optical fiber attenuation value of each of the at least one span included in the first transmission model, the gain value of each of the plurality of optical amplifiers corresponding to the first transmission model, the noise coefficient of each of the plurality of optical amplifiers, the nonlinear degradation influence coefficient, the worst-case channel influence coefficient, the degradation influence coefficient of the equalizer, the number of equalizers corresponding to the first transmission model, and the total length comprises:
determining that a second OSNR of the first transmission model satisfies the following equation:
Figure FDA0003982295920000021
wherein, OSNR 2 A second OSNR representing the first transmission model, P representing the initial optical power, A i A fiber attenuation value, G, representing the ith span comprised by the first transmission model i Representing the gain value of the ith optical amplifier corresponding to the first transmission model,Pase i representing the noise power accumulated by N-i sections of optical fibers after an optical signal passes through the ith optical amplifier and N +1-i amplifiers after the ith optical amplifier, wherein N represents the number of spans corresponding to the first transmission model, L represents the total length, psi represents the nonlinear degradation influence coefficient, theta represents the worst channel influence coefficient, lambda represents the degradation influence coefficient of the equalizer, B represents the number of the equalizers corresponding to the first transmission model, i is more than or equal to 1, N is more than or equal to 1, and B is more than or equal to 1;
Figure FDA0003982295920000022
wherein, pase i Representing the noise power, G, accumulated by the N-i lengths of optical fiber after the optical signal has passed through said i-th optical amplifier and by the N +1-i amplifiers after said i-th optical amplifier i Representing the gain value of the ith optical amplifier, NF representing the noise figure of the ith optical amplifier, A n Representing the fiber attenuation value, G, of the nth fiber of said N-i fibers n And the gain value of the nth optical amplifier in the N +1-i amplifiers is represented, wherein N is more than or equal to 1.
5. The method for optimizing optical fiber transmission according to any one of claims 1 to 4, wherein the method further comprises:
increasing an initial optical power of the optical fiber transmission system and/or shortening a total length of the optical fiber transmission system when a target OSNR of each of the plurality of transmission models is less than the OSNR threshold.
6. The method for optimizing optical fiber transmission according to any one of claims 1 to 4, wherein the method further comprises:
increasing X for the length of each odd span included by the target transmission model, and shortening X for the length of each even span included by the target transmission model to obtain an Xth target transmission model, wherein X is more than or equal to 1;
when the target OSNR of the target transmission model of the X-1 th target transmission model is greater than or equal to the OSNR threshold value and the target OSNR of the X-th target transmission model is less than the OSNR threshold value, determining X-1 as the maximum adjustable length corresponding to the target transmission model;
and determining an adjustable range of the optical fiber transmission system based on the maximum adjustable length and the target length, wherein the adjustable range is used for representing the adjustment range of the target length.
7. An optical fiber transmission optimization device, comprising: the device comprises an acquisition module, a processing module and a determination module;
the acquisition module is used for acquiring the total length of the optical fiber transmission system;
the processing module is configured to divide the optical fiber transmission system based on multiple span numbers, and obtain multiple transmission models corresponding to the optical fiber transmission system and span information of the multiple transmission models, respectively, where the span information of one transmission model includes the span number corresponding to the transmission model and a length of each span included in the transmission model, and the length of each span is a ratio of the total length to the span number corresponding to the transmission model;
the determining module is configured to determine a target optical signal-to-noise ratio OSNR of each of the plurality of transmission models;
the determining module is further configured to determine, as a target transmission model, a transmission model with a maximum target OSNR among the at least one transmission model when the target OSNR of at least one transmission model among the plurality of transmission models is greater than or equal to an OSNR threshold;
the determining module is further configured to determine a single span length corresponding to the target transmission model as a target length, where the single span length is a length of each span included in the target transmission model, and the target length is used to optimize the optical fiber transmission system.
8. The optical fiber transmission optimizing apparatus according to claim 7,
the obtaining module is further configured to obtain an initial optical power of the optical fiber transmission system and an optical fiber attenuation coefficient of the optical fiber transmission system;
the determining module is further configured to determine, according to an optical fiber attenuation coefficient of the optical fiber transmission system and a single span length corresponding to a first transmission model, an optical fiber attenuation value of each of at least one span included in the first transmission model, where the first transmission model is one of the plurality of transmission models;
the determining module is further configured to determine respective gain values of a plurality of optical amplifiers corresponding to the first transmission model and respective noise coefficients of the plurality of optical amplifiers;
the determining module is specifically configured to determine a first OSNR of the first transmission model according to the initial optical power, a respective optical fiber attenuation value of at least one span included in the first transmission model, a respective gain value of a plurality of optical amplifiers corresponding to the first transmission model, and a respective noise coefficient of the plurality of optical amplifiers;
the determining module is specifically further configured to determine a first OSNR of the first transmission model as a target OSNR of the first transmission model.
9. The optical fiber transmission optimizing apparatus according to claim 8,
the obtaining module is further configured to obtain a nonlinear degradation influence coefficient of the optical fiber transmission system, a worst-case channel influence coefficient of the optical fiber transmission system, and a degradation influence coefficient of an equalizer, where the worst-case channel influence coefficient is used to characterize a power amplification condition of a worst-case channel of multiple channels included in the optical fiber transmission system;
the determining module is further specifically configured to determine a second OSNR of the first transmission model according to the initial optical power, a fiber attenuation value of each of at least one span included in the first transmission model, a gain value of each of a plurality of optical amplifiers corresponding to the first transmission model, a noise coefficient of each of the plurality of optical amplifiers, the nonlinear degradation influence coefficient, the worst channel influence coefficient, the degradation influence coefficient of the equalizer, the number of equalizers corresponding to the first transmission model, and the total length;
the determining module is specifically further configured to determine the second OSNR of the first transmission model as a target OSNR of the first transmission model.
10. The optical fiber transmission optimizing apparatus of claim 9,
the determining module is specifically further configured to determine that the second OSNR of the first transmission model satisfies the following formula:
Figure FDA0003982295920000051
wherein, OSNR 2 A second OSNR representing the first transmission model, P representing the initial optical power, A i A fiber attenuation value, G, representing the ith span comprised by the first transmission model i Representing the gain value, pase, of the ith optical amplifier corresponding to the first transmission model i Representing the noise power accumulated by N-i sections of optical fibers after an optical signal passes through the ith optical amplifier and N +1-i amplifiers after the ith optical amplifier, wherein N represents the number of spans corresponding to the first transmission model, L represents the total length, psi represents the nonlinear degradation influence coefficient, theta represents the worst channel influence coefficient, lambda represents the degradation influence coefficient of the equalizer, B represents the number of equalizers corresponding to the first transmission model, i is more than or equal to 1, N is more than or equal to 1, and B is more than or equal to 1;
Figure FDA0003982295920000052
wherein, pase i Representing the noise power, G, accumulated by the N-i sections of optical fiber after the optical signal has passed through said ith optical amplifier and by the N +1-i amplifiers after said ith optical amplifier i Indicating the gain of the ith optical amplifierThe value NF represents the noise figure of the ith optical amplifier, A n Representing the fiber attenuation value, G, of the nth fiber of said N-i fibers n And the gain value of the nth optical amplifier in the N +1-i amplifiers is represented, wherein N is more than or equal to 1.
11. The optical fiber transmission optimizing device according to any one of claims 7 to 10,
the processing module is further configured to increase an initial optical power of the optical fiber transmission system and/or shorten a total length of the optical fiber transmission system when the target OSNR of each of the plurality of transmission models is less than the OSNR threshold.
12. The optical fiber transmission optimizing device according to any one of claims 7 to 10,
the processing module is further configured to increase X for the length of each odd span included in the target transmission model, and shorten X for the length of each even span included in the target transmission model, so as to obtain an xth target transmission model, where X is greater than or equal to 1;
the determining module is further configured to determine X-1 as a maximum adjustable length corresponding to a target transmission model when a target OSNR of the X-1 th target transmission model is greater than or equal to the OSNR threshold and the target OSNR of the X-th target transmission model is less than the OSNR threshold;
the determining module is further configured to determine an adjustable range of the optical fiber transmission system based on the maximum adjustable length and the target length, where the adjustable range is used to characterize an adjustment range of the target length.
13. An electronic device, characterized in that the electronic device comprises:
a processor;
a memory configured to store the processor-executable instructions;
wherein the processor is configured to execute the instructions to implement the optical fiber transmission optimization method of any one of claims 1-6.
14. A computer-readable storage medium having instructions stored thereon, wherein the instructions in the computer-readable storage medium, when executed by an electronic device, enable the electronic device to perform the optical fiber transmission optimization method of any of claims 1-6.
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