CN111416664A - Dispersion compensation method, device and storage medium - Google Patents

Abstract

The invention discloses a dispersion compensation method, a device and a storage medium for realizing dynamic dispersion compensation. A dispersion compensation method includes: acquiring optical fiber link length and optical fiber property information; determining a dispersion compensation value according to the acquired optical fiber link length and optical fiber property information; and performing dispersion compensation according to the determined dispersion compensation value.

Description

Dispersion compensation method, device and storage medium

technical field

The present invention relates to the technical field of wireless communication, and in particular, to a dispersion compensation method, device and storage medium.

Background technique

Dispersion is a key factor affecting the performance of optical transmission systems. After the optical signal is transmitted in the fiber, it is affected by the dispersion effect, which causes the signal to broaden in the time domain. The longer the transmission distance, the more serious the effect of dispersion. The higher the speed of the optical signal, the narrower the pulse, and the greater the effect of chromatic dispersion.

In order to meet the future 5G (5th generation mobile communication) service requirements, the transmission network faces new challenges. In the era of 4G (4th generation mobile communication), the fronthaul network is mainly divided into optical fiber direct drive and passive wave; in the 5G era, optical fiber direct drive is still the main solution. transmission device. However, compared with 4G, the 5G fronthaul network speed is increased from 10G to 25G, the backhaul access layer is increased to 50G, and the backhaul core layer and aggregation layer have wavelength division multiplexing requirements. With the increase of the transmission rate, the limitation of the chromatic dispersion on the transmission distance of the system becomes more and more obvious. Non-coherent transmission systems based on 25G NRZ (Non-Return to Zero) or 50G PAM4 (4Pulse Amplitude Modulation, 4-level pulse amplitude modulation) must use dispersion compensation technology for application scenarios with transmission distances greater than 40km. Transmission distance.

Due to the emergence of wavelength division multiplexing requirements, dispersion management of different wavelengths needs to be considered in dispersion compensation. Existing dispersion compensation methods are mainly based on dispersion compensation fibers. The dispersion compensation fiber selects a certain length of dispersion compensation fiber to compensate the fixed link dispersion according to the opposite characteristics of the dispersion characteristics of the dispersion compensation fiber to that of the single mode fiber. However, the dispersion compensation fiber has large insertion loss and fixed dispersion compensation value, so dynamic dispersion compensation cannot be realized.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a method, device and storage medium for dispersion compensation, so as to realize dynamic dispersion compensation.

In a first aspect, a dispersion compensation method is provided, including:

Obtain fiber link length and fiber attribute information;

Determine the dispersion compensation value according to the obtained fiber link length and fiber attribute information;

Dispersion compensation is performed according to the determined dispersion compensation value.

Optionally, before acquiring the fiber link length and fiber attribute information, the method further includes:

measuring fiber link length; and

Get the fiber link length, including:

Read fiber link length measurements.

Optionally, dispersion compensation is performed according to the determined dispersion compensation value, specifically including:

The determined dispersion compensation value is sent to the dispersion compensation unit, and the dispersion compensation unit performs dispersion compensation according to the dispersion compensation value.

Optionally, the fiber property information includes dispersion and dispersion slope.

In a second aspect, a dispersion compensation device is provided, including:

The acquisition unit is used to acquire the fiber link length and fiber attribute information;

A determining unit, configured to determine a dispersion compensation value according to the acquired optical fiber link length and optical fiber attribute information.

The control unit is configured to perform dispersion compensation according to the dispersion compensation value determined by the determination unit.

Optionally, the dispersion compensation device provided in the embodiment of the present invention may further include a link measurement unit, wherein:

the link measurement unit for measuring the length of the optical fiber link; and

The acquisition unit is configured to read the optical fiber link length measurement result from the link measurement unit.

Optionally, the optical transmission system further includes a dispersion compensation unit; and

The control unit is specifically configured to send the determined dispersion compensation value to the dispersion compensation unit, and the dispersion compensation unit performs dispersion compensation according to the dispersion compensation value.

Optionally, the fiber property information includes dispersion and dispersion slope.

In a third aspect, a computing device is provided, comprising at least one processor and at least one memory, wherein the memory stores a computer program that, when the program is executed by the processor, causes the processor to execute the above The steps described in the dispersion compensation method.

In a fourth aspect, a computer-readable medium is provided, which stores a computer program executable by a computing device, and when the program is executed on the computing device, causes the computing device to perform the steps of the dispersion compensation method.

The dispersion compensation method, device, and storage medium provided by the embodiments of the present invention use the length of the optical fiber link as the basis for dispersion adjustment. In this way, when the length of the optical fiber link changes, the required compensation can be dynamically adjusted according to the change in the length of the optical fiber link. Dispersion amount.

Other features and advantages of the present invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description, claims, and drawings.

Description of drawings

The accompanying drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

FIG. 1 is a schematic flowchart of an implementation of a dispersion compensation method in an embodiment of the present invention;

2 is a schematic structural diagram of a dispersion compensation device in an embodiment of the present invention;

3 is a schematic structural diagram of an optical transmission system in an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a computing device according to an embodiment of the present invention.

Detailed ways

In order to realize dynamic dispersion compensation, embodiments of the present invention provide a dispersion compensation method, device, and storage medium.

The terms "first", "second" and the like in the description and claims in the embodiments of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that data so used may be interchanged under appropriate circumstances so that the embodiments described herein can be practiced in sequences other than those illustrated or described herein. Reference herein to "a plurality or several" means two or more. "And/or", which describes the association relationship of the associated objects, means that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, A and B exist at the same time, and B exists alone. The character "/" generally indicates that the associated objects are an "or" relationship.

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, but not to limit the present invention, and in the case of no conflict, the present invention The embodiments in and features in the embodiments can be combined with each other.

As shown in FIG. 1, it is a schematic flowchart of the implementation of the dispersion compensation method provided by the embodiment of the present invention, including the following steps:

S11. Obtain the fiber link length and fiber attribute information.

The fiber attribute information includes dispersion and dispersion slope. Since the fiber parameters strictly follow the specifications, the dispersion and dispersion slope of different types of fibers are clearly specified. That is, for a fixed type of fiber, the dispersion and dispersion slope are fixed values. In the embodiment of the present invention, the dispersion compensating device may pre-store the correspondence between the fiber type and the fiber attribute information. In this way, during specific implementation, the corresponding fiber attribute information may be determined according to the fiber type of the current transmission link.

In specific implementation, for the length of the optical fiber link, the OTDR (optical time-domain reflectometer, optical time domain reflectometer) integrated in the optical transmission system can be used to measure the length of the optical fiber link. In this implementation, no additional measurement needs to be introduced. module. The OTDR unit can be used to measure the length of the optical fiber in real time. Therefore, when the length of the optical fiber changes, according to the embodiment of the present invention, the corresponding dispersion change can be determined in real time and the amount of dispersion to be compensated can be dynamically adjusted.

Of course, during specific implementation, an additional optical fiber link measurement module may also be introduced to measure the length of the optical fiber link, which is not limited in this embodiment of the present invention.

S12. Determine a dispersion compensation value according to the acquired optical fiber link length and optical fiber attribute information.

S13. Perform dispersion compensation according to the determined dispersion compensation value.

In this step, the dispersion compensation value of each channel is adjusted according to the dispersion compensation value determined in step S12 to realize the dispersion compensation of each channel.

The dispersion compensation method provided by the embodiment of the present invention is based on the corresponding relationship between dispersion and optical fiber length, and the optical fiber length is measured as the basis for adjusting the dispersion compensation value. Since the color of fiber parameters follows the normative standards, the dispersion and dispersion slope of different types of fibers are clearly specified. According to the cumulative nature of dispersion, as long as the fiber length of the transmission system is accurately measured at the receiving end, the amount of dispersion that needs to be compensated for each waveguide can be determined according to the properties of the fiber, the fiber length can be converted into a dispersion value, and then sent to the adjustable dispersion value. The dispersion compensation unit performs dispersion adjustment to realize dispersion compensation. For changes in the length of optical cables caused by optical cable cutting or routing, the dispersion compensation method provided by the embodiments of the present invention can calculate the corresponding dispersion changes in real time and dynamically adjust the amount of dispersion to be compensated. Therefore, the dispersion compensation method provided by the embodiment of the present invention also supports online and offline dispersion compensation of services.

Based on the same inventive concept, an embodiment of the present invention also provides a dispersion compensation device. Since the above-mentioned device and device solve problems in a similar manner to the dispersion compensation method, the implementation of the above-mentioned device can refer to the implementation of the method, and the repetition will not be repeated. Repeat.

As shown in FIG. 2, it is a schematic structural diagram of a dispersion compensation device provided by an embodiment of the present invention, including:

Obtaining unit 21 is used to obtain fiber link length and fiber attribute information;

The determining unit 22 is configured to determine the dispersion compensation value according to the acquired optical fiber link length and optical fiber attribute information.

The control unit 23 is configured to perform dispersion compensation according to the dispersion compensation value determined by the determination unit 22 .

Optionally, the fiber property information includes dispersion and dispersion slope.

Optionally, the dispersion compensation device provided in the embodiment of the present invention may further include a link measurement unit, wherein:

a link measurement unit, used to measure the length of the optical fiber link before the acquisition unit acquires the optical fiber link length and optical fiber attribute information;

The acquisition unit 21 is specifically configured to read the optical fiber link length measurement result from the link measurement unit.

During specific implementation, the dispersion compensation device provided by the embodiment of the present invention can be applied to an optical transmission system, and the functional modules therein can multiplex the functional modules in the optical transmission system. For example, the link measurement unit can utilize the OTDR in the optical transmission system. unit to achieve, as shown in FIG. 3 , which is a schematic structural diagram of the dispersion compensation device provided by the embodiment of the present invention applied to an optical transmission system in a wavelength division multiplexing scenario. In FIG. 3, OUT refers to an optical transform unit (Optical Transform Unit). The obtaining unit 21 is configured to read the optical fiber link length measurement result from the link measuring unit (OTDR unit).

As shown in FIG. 3 , the dispersion compensation apparatus according to the embodiment of the present invention may be composed of three parts: a dispersion management unit, a dispersion compensation unit, and a link measurement unit in an optical transmission system. The dispersion management unit includes a reading module, a storage module, an arithmetic Module and control module, wherein, the storage module and the reading module are used to realize the function of the acquisition unit, the operation module is used to realize the function of the determination unit, and the control module is used to realize the function of the control unit. The control unit is specifically configured to send the determined dispersion compensation value to the dispersion compensation unit, and the dispersion compensation unit performs dispersion compensation according to the dispersion compensation value.

In specific implementation, the reading module is used to read the link length information measured by the link measurement unit (for example, it can be an OTDR unit); the storage module is used to pre-store fiber attribute information, such as dispersion, dispersion slope, etc.; is used for determining the dispersion compensation value to be compensated for each channel; the control module is used for sending adjustment information to the dispersion compensation unit according to the dispersion compensation value determined by the operation module. Specifically, the dispersion management unit first reads the optical fiber link length measured by the link measurement unit, then reads the pre-stored optical fiber attribute information, and determines the dispersion compensation value that needs to be compensated for each channel in combination with the optical fiber link length and the optical fiber attribute information, and send the determined dispersion compensation value to the dispersion compensation unit for dispersion compensation.

For the convenience of description, the above parts are divided into modules (or units) according to their functions and described respectively. Of course, when implementing the present invention, the functions of each module (or unit) may be implemented in one or more software or hardware.

After introducing the dispersion compensation method and device according to the exemplary embodiment of the present invention, next, a computing device according to another exemplary embodiment of the present invention is introduced.

As will be appreciated by one skilled in the art, various aspects of the present invention may be implemented as a system, method or program product. Therefore, various aspects of the present invention can be embodied in the following forms: a complete hardware implementation, a complete software implementation (including firmware, microcode, etc.), or a combination of hardware and software aspects, which may be collectively referred to herein as implementations "circuit", "module" or "system".

In some possible implementations, a computing device according to the present invention may include at least one processor, and at least one memory. Wherein, the memory stores program codes, which, when executed by the processor, cause the processor to execute the steps in the dispersion compensation method according to various exemplary embodiments of the present invention described above in this specification . For example, the processor may perform steps S11, as shown in FIG. 1, obtaining the fiber link length and fiber attribute information, and step S12, determining a dispersion compensation value according to the obtained fiber link length and fiber attribute information; and steps S13. Perform dispersion compensation according to the determined dispersion compensation value.

A computing device 40 according to this embodiment of the invention is described below with reference to FIG. 4 . The computing device 40 shown in FIG. 4 is only an example, and should not impose any limitation on the function and scope of use of the embodiments of the present invention.

As shown in FIG. 4, computing device 40 takes the form of a general-purpose computing device. Components of the computing device 40 may include, but are not limited to, the above-mentioned at least one processor 41 , the above-mentioned at least one memory 42 , and a bus 43 connecting different system components (including the memory 42 and the processor 41 ).

Bus 43 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, a processor, or a local bus using any of a variety of bus structures.

Memory 42 may include readable media in the form of volatile memory, such as random access memory (RAM) 421 and/or cache memory 422 , and may further include read only memory (ROM) 423 .

The memory 42 may also include a program/utility 425 having a set (at least one) of program modules 424 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, which An implementation of a network environment may be included in each or some combination of the examples.

Computing device 40 may also communicate with one or more external devices 44 (eg, keyboards, pointing devices, etc.), may also communicate with one or more devices that enable a user to interact with computing device 40, and/or communicate with the computing device 40. 40 communicates with any device (eg, router, modem, etc.) capable of communicating with one or more other computing devices. Such communication may take place through input/output (I/O) interface 45 . Also, the computing device 40 may communicate with one or more networks (eg, a local area network (LAN), a wide area network (WAN), and/or a public network such as the Internet) through a network adapter 46 . As shown, network adapter 46 communicates with other modules for computing device 40 via bus 43 . It should be understood that, although not shown, other hardware and/or software modules may be used in conjunction with computing device 40, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID systems, tape drives and data backup storage systems.

In some possible implementations, various aspects of the dispersion compensation method provided by the present invention can also be implemented in the form of a program product, which includes program code, and when the program product runs on a computer device, the program code For causing the computer device to perform the steps in the dispersion compensation method according to various exemplary embodiments of the present invention described above in this specification, for example, the computer device may perform step S11 as shown in FIG. link length and fiber attribute information, and step S12, determining a dispersion compensation value according to the obtained fiber link length and fiber attribute information; and step S13, performing dispersion compensation according to the determined dispersion compensation value.

The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus or device, or a combination of any of the above. More specific examples (non-exhaustive list) of readable storage media include: electrical connections with one or more wires, portable disks, hard disks, random access memory (RAM), read only memory (ROM), erasable programmable read only memory (EPROM or flash memory), optical fiber, portable compact disk read only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

The program product for dispersion compensation of embodiments of the present invention may employ a portable compact disk read only memory (CD-ROM) and include program code, and may be executed on a computing device. However, the program product of the present invention is not limited thereto, and in this document, a readable storage medium may be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

A readable signal medium may include a propagated data signal in baseband or as part of a carrier wave, carrying readable program code therein. Such propagated data signals may take a variety of forms including, but not limited to, electromagnetic signals, optical signals, or any suitable combination of the foregoing. A readable signal medium can also be any readable medium, other than a readable storage medium, that can transmit, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.

Program code embodied on a readable medium may be transmitted using any suitable medium including, but not limited to, wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

Program code for carrying out operations of the present invention may be written in any combination of one or more programming languages, including object-oriented programming languages—such as Java, C++, etc., as well as conventional procedural Programming Language - such as the "C" language or similar programming language. The program code may execute entirely on the user computing device, partly on the user device, as a stand-alone software package, partly on the user computing device and partly on a remote computing device, or entirely on the remote computing device or server execute on. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any kind of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (eg, using an Internet service) provider to connect via the Internet).

It should be noted that although several units or sub-units of the apparatus are mentioned in the above detailed description, this division is merely exemplary and not mandatory. Indeed, in accordance with embodiments of the present invention, the features and functions of two or more units described above may be embodied in one unit. Conversely, the features and functions of one unit described above may be further subdivided to be embodied by multiple units.

Furthermore, although the operations of the methods of the present invention are depicted in the figures in a particular order, this does not require or imply that the operations must be performed in the particular order, or that all illustrated operations must be performed to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined to be performed as one step, and/or one step may be decomposed into multiple steps to be performed.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions The apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

Although the preferred embodiments of the present invention have been described, additional changes and modifications to these embodiments may occur to those skilled in the art once the basic inventive concepts are known. Therefore, the appended claims are intended to be construed to include the preferred embodiment and all changes and modifications that fall within the scope of the present invention.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, provided that these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims (11)

1. a dispersion compensation method, is characterized in that, comprises: Obtain fiber link length and fiber attribute information; Determine the dispersion compensation value according to the obtained fiber link length and fiber attribute information; Dispersion compensation is performed according to the determined dispersion compensation value. 2. The method of claim 1, further comprising: before acquiring the optical fiber link length and optical fiber attribute information: measuring fiber link length; and Get the fiber link length, including: Read fiber link length measurements. 3. The method according to claim 1, wherein the dispersion compensation is performed according to the determined dispersion compensation value, which specifically comprises: The determined dispersion compensation value is sent to the dispersion compensation unit, and the dispersion compensation unit performs dispersion compensation according to the dispersion compensation value. 4. The method of claim 1, 2 or 3, wherein the fiber property information includes dispersion and dispersion slope. 5. A dispersion compensation device, comprising: The acquisition unit is used to acquire the fiber link length and fiber attribute information; A determination unit, configured to determine a dispersion compensation value control unit according to the acquired optical fiber link length and optical fiber attribute information, and configured to perform dispersion compensation according to the dispersion compensation value determined by the determination unit. 6. The apparatus of claim 5, further comprising a link measurement unit, wherein: the link measurement unit for measuring the length of the optical fiber link; and The acquisition unit is configured to read the optical fiber link length measurement result from the link measurement unit. 7 . The device according to claim 6 , wherein the device is applied in an optical transmission system, and the link measurement unit is an optical time domain reflectometer (OTDR) unit. 8 . 8. The apparatus of claim 7, wherein the optical transmission system further comprises a dispersion compensation unit; and The control unit is specifically configured to send the determined dispersion compensation value to the dispersion compensation unit, and the dispersion compensation unit performs dispersion compensation according to the dispersion compensation value. 9 . The apparatus according to claim 5 , wherein the optical fiber property information includes dispersion and dispersion slope. 10 . 10. A computing device, comprising at least one processor and at least one memory, wherein the memory stores a computer program that, when the program is executed by the processor, causes the processor to execute The steps of the method of any one of claims 1-4. 11. A computer-readable medium, characterized in that it stores a computer program executable by a computing device, when the program runs on the computing device, the computing device is made to execute any one of claims 1-4 steps of the method.

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