CN116131992A

CN116131992A - Optical communication method, system, communication device and storage medium

Info

Publication number: CN116131992A
Application number: CN202211539201.XA
Authority: CN
Inventors: 张传熙; 焦明涛; 刘刚; 段宏; 乔月强; 钟志刚
Original assignee: China United Network Communications Group Co Ltd; China Information Technology Designing and Consulting Institute Co Ltd
Current assignee: China United Network Communications Group Co Ltd; China Information Technology Designing and Consulting Institute Co Ltd
Priority date: 2022-12-01
Filing date: 2022-12-01
Publication date: 2023-05-16

Abstract

The application provides an optical communication method, an optical communication system, communication equipment and a storage medium, which relate to the technical field of communication and are used for guaranteeing the stability of optical power in the optical signal transmission process, so that the transmission performance of an optical communication system is improved. The method comprises the following steps: acquiring a wavelength channel occupied by an opened service in an optical communication system and a total wavelength channel of the optical communication system, and determining the rest wavelength channels of the optical communication system according to the wavelength channel occupied by the opened service and the total wavelength channel; filtering the preset optical noise signal to obtain a first optical wave and a second optical wave; the first light wave and the second light wave have different frequencies; combining the first light wave and the second light wave to obtain combined light waves, and filling the combined light waves into each remaining wavelength channel respectively.

Description

Optical communication method, system, communication device and storage medium

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to an optical communication method, an optical communication system, a communication device, and a storage medium.

Background

Large capacity, long distances are a long-standing significant evolution of optical transmission systems. For example, currently, coherent optical communication technology is commonly used in optical transport network (Optical Transport Network, OTN) systems or optical wavelength division multiplexing (Wavelength Division Multiplexing, WDM) systems, where fiber loss is a major factor in limiting the transmission distance of an electrical relay in the coherent optical communication technology. To compensate for the fiber loss, an optical amplifier (Optical Amplifier, OA) is placed across each fiber span to compensate for the fiber span loss.

However, each time the optical signal is amplified by one stage OA, optical power is lost, resulting in degradation of the optical signal to noise ratio (Optical Signal Noise Ratio, OSNR) of the system and degradation of transmission performance.

Disclosure of Invention

The application provides an optical communication method, an optical communication system, communication equipment and a storage medium, which are used for guaranteeing the stability of optical power in the optical signal transmission process, so as to improve the transmission performance of an optical communication system.

In order to achieve the above purpose, the present application adopts the following technical scheme:

in a first aspect, an optical communication method is provided, applied to an optical communication system, and the method includes: acquiring a wavelength channel occupied by an opened service in an optical communication system and a total wavelength channel of the optical communication system, and determining the rest wavelength channels of the optical communication system according to the wavelength channel occupied by the opened service and the total wavelength channel; filtering the preset optical noise signal to obtain a first optical wave and a second optical wave; the first light wave and the second light wave have different frequencies; combining the first light wave and the second light wave to obtain combined light waves, and filling the combined light waves into each remaining wavelength channel respectively.

Optionally, the method further comprises: and acquiring a white noise signal, and performing power amplification on the white noise signal to obtain a preset optical noise signal.

Optionally, filtering the preset optical noise signal to obtain a first optical wave and a second optical wave, including: and filtering the preset optical noise signal through a wavelength selective switch WSS to obtain a first optical wave and a second optical wave.

Optionally, the WSS includes a first filtering channel and a second filtering channel; the method comprises the steps of performing filtering processing on a preset optical noise signal through a wavelength selective switch WSS to obtain a first optical wave and a second optical wave, and comprising the following steps: inputting a preset optical noise signal into a first filtering channel to obtain a first optical wave; and inputting the preset optical noise signal into a second filtering channel to obtain a second optical wave.

Optionally, the WSS further comprises a waveform integration channel; combining the first light wave with the second light wave to obtain a combined light wave, including: the first light wave and the second light wave are input into the waveform integration channel, and the combined light wave is output.

Optionally, filling the combined light wave into each remaining wavelength channel respectively, including: the combined light waves are filled into each of the remaining wavelength channels through the optical coupler, respectively.

In a second aspect, an optical communication system is provided, the optical communication system comprising a first optical conversion unit OTU, a second OTU, a wavelength selective switch WSS, an optical coupler and a first optical amplifier OA; the first OTU is connected with an input interface of the optical coupler, the WSS is connected with the input interface of the optical coupler, an output interface of the optical coupler is connected with an input interface of the first OA, and an output interface of the first OA is connected with the second OTU.

Optionally, the number of the first OA is a plurality, and each first OA is connected in series.

Optionally, the optical communication system includes a second OA and a third OA; the output interface of the second OA is connected with the input interface of the third OA; the output interface of the third OA is connected with the input interface of the WSS.

Optionally, the WSS is connected to an input interface of the optocoupler, comprising: the output interface of the WSS is connected with the input interface of the optical coupler.

Optionally, the WSS further includes a first filtering channel and a second filtering channel; the grid characteristics of the first filter channel are different from the grid characteristics of the filter channel.

Optionally, the number of the first OTUs is multiple, and each first OTU is connected in parallel.

Optionally, the optical communication system further comprises an optical multiplexer/demultiplexer; the first OTU is connected with an input interface of the optocoupler, comprising: each first OTU is connected with an input interface of an optical coupler through an optical multiplexer/demultiplexer.

Optionally, the number of the second OTUs is multiple, and each second OTU is connected in parallel.

Optionally, the optical communication system further comprises an optical multiplexer/demultiplexer; the output interface of the first OA is connected with the second OTU, and comprises: the output interface of the first OA is connected with each second OTU through a light multiplexer-demultiplexer.

In a third aspect, there is provided a communication device comprising: a processor, a memory for storing instructions executable by the processor; wherein the processor is configured to execute instructions to implement the optical communication method of the first aspect described above.

In a fourth aspect, there is provided a computer-readable storage medium having instructions stored thereon that, when executed by a processor of a communication device, enable the communication device to perform the optical communication method of the first aspect described above.

The technical scheme provided by the embodiment of the application at least brings the following beneficial effects: and acquiring a wavelength channel occupied by the opened service in the optical communication system and a total wavelength channel of the optical communication system, and determining the rest wavelength channels of the optical communication system according to the wavelength channel occupied by the opened service and the total wavelength channel. Further, filtering the preset optical noise signal to obtain a first optical wave and a second optical wave; the first light wave and the second light wave have different frequencies; combining the first light wave and the second light wave to obtain combined light waves, and filling the combined light waves into each remaining wavelength channel respectively. The present application, through certain combinations and configurations, achieves noise-filled light that is nearly identical to the signal light waveform. Furthermore, by noise light filling, the optical communication system always works in a stable state of saturated output (namely, light wave transmission exists on all wavelength channels), so that the purpose of locking service light power is achieved, and the system is more stable.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a point-to-point open optical network transmission provided in an embodiment of the present application;

FIG. 2 is a schematic diagram of an example of a light detection point according to an embodiment of the present application;

fig. 3 is an optical power monitoring diagram provided in an embodiment of the present application;

fig. 4 is a schematic structural diagram of an optical communication system according to an embodiment of the present application;

fig. 5 is a second schematic structural diagram of an optical communication system according to an embodiment of the present application;

fig. 6 is a schematic diagram of the operation of the wavelength selective switch according to the embodiment of the present application;

fig. 7 is a functional schematic diagram of a wavelength selective switch according to an embodiment of the present disclosure;

fig. 8 is a schematic flow chart of an optical communication method according to an embodiment of the present application;

FIG. 9 is a spectrum diagram of light waves corresponding to an opened service provided in an embodiment of the present application;

FIG. 10 is a spectrum of the second-level OA amplified image provided by the embodiment of the present application;

FIG. 11 is an odd-numbered wave noise spectrum obtained by WSS filtering processing according to an embodiment of the present application;

FIG. 12 is a spectrum of even-numbered wave noise obtained by WSS filtering according to an embodiment of the present application;

FIG. 13 is a spectrum diagram of the parity wave combination provided in the embodiment of the present application;

FIG. 14 is a spectrum of a filled combined light provided in an embodiment of the present application;

fig. 15 is a schematic view of the optical power variation range before and after filling according to the embodiment of the present application;

FIG. 16 is a schematic diagram illustrating the effect of channel shutdown on the optical power of other channels when noise light is not filled in the embodiments of the present application;

FIG. 17 is a schematic diagram illustrating the effect of channel shutdown on optical power of other channels after noise light filling according to an embodiment of the present disclosure;

fig. 18 is a schematic structural diagram of a control device according to an embodiment of the present disclosure;

fig. 19 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

It should be noted that, in the embodiments of the present application, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

It should be noted that, in the embodiment of the present application, "english: of", "corresponding" and "corresponding" may sometimes be used in combination, and it should be noted that the meaning to be expressed is consistent when the distinction is not emphasized.

In order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, the terms "first", "second", and the like are used to distinguish the same item or similar items having substantially the same function and effect, and those skilled in the art will understand that the terms "first", "second", and the like are not limited in number and execution order.

Before explaining the embodiments of the present application in detail, some related techniques related to the embodiments of the present application are described.

Large capacity, long distances are a long-standing significant evolution of optical transmission systems. Currently, coherent optical communication technology is commonly adopted in an optical transport network (Optical Transport Network, OTN) system or an optical wavelength division multiplexing (Wavelength Division Multiplexing, WDM) system, wherein optical fiber loss is a main factor for limiting an electroless relay transmission distance in the coherent optical communication technology. To compensate for the fiber loss, an optical amplifier (Optical Amplifier, OA) is placed across each fiber span to compensate for the fiber span loss.

By way of example, as shown in fig. 1, a point-to-point open optical network transmission schematic is shown, wherein an open line system may connect different end devices (e.g., optical transport units (Optical Transport Unit, OTUs) of different vendors). The optical power is attenuated after transmitting a distance, an Optical Amplifier (OA) is arranged on the way to restore the optical power to the original level, and the optical power reaches the host end to be received by the OTU after multi-stage transmission and amplification.

Noise is introduced in the transmission process, so that the performance index of the optical network is reduced, and when the index is lower than the threshold of the receiving end, the system generates error codes, so that information transmission fails.

The open optical network at the present stage is mainly used for data center interconnection and metropolitan area transmission network, and has short distance and low requirement on system performance. With the development of technology, an open optical network will gradually enter the long-distance transmission field. In a long-distance optical network, signal optical power is a critical factor affecting transmission performance, and when the optical power is jittered and drifted and unstable, error codes are most easily generated through multi-level OA amplification. Ensuring the optical power stability of each channel is therefore a very important technical means of optical communication systems.

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

An exemplary diagram of a light detection point is shown, for example, as shown in fig. 2. Wherein, the output end of the OA is provided with a monitoring point for monitoring the optical power of each channel. When the optical power changes and drifts are found, the sending optical power of the OTU is adjusted so as to ensure the stability of the optical power on the optical cable.

However, in the early stage of engineering construction, in the case where the service channels are not fully allocated, the OA equipment needs to operate with a small power, and at this time, the optical power is liable to drift and shake. For example, as shown in fig. 3, the single-wave optical power of the 400Gb/s optical transmission system is monitored for a long period of time of 6 hours, and when the number of channels is small, the optical power is found to be in an unstable state and has a tendency to drift upward gradually.

In addition, when the system service channels are fewer, the up-and-down wave process of the service can also influence the optical power of other channels. In an open optical network, terminal equipment and a line system come from different manufacturers, and because of difficulty in strictly unifying all parameter indexes, monitoring and adjustment of a management and control system on the network are often not as level as those of a system of a single manufacturer, and the monitoring and adjustment are mainly reflected in accuracy and instantaneity.

Therefore, the fewer the number of the service channels and the larger the number of the OAs, the larger the jitter range of the optical power, and the more likely the error code is generated at the receiving end, so that the optical power stabilizing scheme needs to be designed.

In view of this, the present application provides an optical communication method, in which the OA is operated in a state where the output optical power is nearly saturated by filling the optical power in the spare channel, so as to achieve the purpose of locking the service optical power, and make the system more stable.

The following describes in detail an optical communication method provided in an embodiment of the present application with reference to the accompanying drawings.

Fig. 4 illustrates an exemplary application scenario diagram provided by an embodiment of the present application. As shown in fig. 4, the optical communication method provided in the embodiment of the present application may be applied to the optical communication system 10. The Optical communication system 10 includes a first Optical conversion unit OTU (11), a second OTU (12), a wavelength selective switch (Wavelength Selection Switch, WSS) (13), an Optical Coupler (OC) (14), and a first Optical amplifier OA (15); the first OTU (11) is connected with an input interface of the optical coupler (14), the WSS (13) is connected with an input interface of the optical coupler (14), an output interface of the optical coupler (14) is connected with an input interface of the first OA (15), and an output interface of the first OA (15) is connected with the second OTU (12).

Alternatively, as shown in fig. 5, the number of the first OA (15) is plural, and the first OA is connected in series.

In practical applications, the number of first OA (15) may be flexibly set according to the size of the transmission distance. After the signal is amplified by one first OA, a part of the signal is lost by a section of transmission distance, and then the signal enters the next second OA to be amplified, so that the signal can reach the second OTU (12) smoothly.

Optionally, as shown in FIG. 5, the optical communication system 10 includes a second OA (16) and a third OA (17). Wherein the output interface of the second OA (16) is connected with the input interface of the third OA (17); the output interface of the third OA (17) is connected with the input interface of the WSS (13).

Optionally, as shown in fig. 5, the output interface of the WSS (13) is connected with the input interface of the optocoupler (14).

Optionally, as shown in fig. 5, the WSS (13) further includes a first filtering channel and a second filtering channel; wherein the grid characteristics of the first filter channel are different from the grid characteristics of the filter channel.

Alternatively, as shown in fig. 5, the number of the first OTUs (11) is plural, and the first OTUs are connected in parallel.

Optionally, as shown in fig. 5, the optical communication system 10 further includes an optical multiplexer/demultiplexer (18). Each first OTU (11) is connected with an input interface of an optical coupler (14) through an optical multiplexer/demultiplexer (18).

Alternatively, as shown in fig. 5, the number of the second OTUs (12) is plural, and the second OTUs (12) are connected in parallel. The output interface of the first OA (15) is connected with each second OTU (12) through an optical multiplexer/demultiplexer (18).

It should be noted that, the Wavelength Selective Switch (WSS) is a core device of a new generation of Reconfigurable Optical Add Drop Multiplexer (ROADM) technology, and it adopts a free space optical switching technology, which can provide channels with wavelength granularity in all directions, support remote reconfiguration of all through ports and add/Drop ports, support reconfiguration of any wavelength from any port up and down, and support reconfiguration of lines and local up and down wavelengths.

Fig. 6 shows the basic principle of the operation of a Wavelength Selective Switch (WSS). After receiving the optical signals, the WSS device demultiplexes each wavelength according to different spatial positions; the wavelength selection unit can change the phase of a certain wavelength according to the requirement through Liquid Crystal On Silicon (LCOS), so as to achieve the functions of adjusting the attenuation and switching of each wavelength.

Taking a 9-dimensional WSS device as an example, as shown in fig. 7, after signal light enters the WSS device from the left port, each wavelength is demultiplexed according to the spatial position and is respectively assigned to 9 different ports for output. The number of wavelengths and the sequence number of wavelengths output by each port are adjustable.

The optical communication method provided in the embodiment of the present application is described below with reference to the optical communication system shown in fig. 4.

Fig. 8 is a flow chart illustrating an optical communication method according to some example embodiments. In some embodiments, the above-described optical communication method may be applied to an optical communication system as shown in fig. 4, and may also be applied to other similar communication systems.

As shown in fig. 8, the optical communication method provided in the embodiment of the present application includes the following S201 to S204.

S201, acquiring a wavelength channel occupied by an opened service in the optical communication system and a total wavelength channel of the optical communication system, and determining the rest wavelength channels of the optical communication system according to the wavelength channel occupied by the opened service and the total wavelength channel.

As one possible implementation manner, the management and control device obtains a wavelength channel occupied by an opened service in the optical communication system and a total wavelength channel of the optical communication system. Further, the management and control device subtracts the wavelength channel occupied by the opened service from the total wavelength channel of the optical communication system to obtain the remaining wavelength channels of the optical communication system.

In practical applications, the management and control device may be deployed in the optical communication system shown in fig. 4, for performing management and control on the optical communication system. The management and control device may be any communication device with management and control functions, and the specific form of the management and control device in the embodiments of the present application is not limited.

It should be noted that the total wavelength channels of the optical communication system, that is, the maximum number of wavelength channels that can be carried by the optical communication system, is configured by the practical situation of the optical communication system, for example, in a 400Gb/s system, a total of 48 wavelength channels are fully allocated. Let the wavelength channels occupied by the opened traffic be λ1 to 2, λ24 to 25, and λ47 to 48, then the remaining wavelength channels (λ3 to 23, λ26 to 46) are temporarily empty, which are all called remaining wavelength channels.

Fig. 9 shows a spectrum of the light waves corresponding to the opened service. Wherein the horizontal axis represents wavelength and the vertical axis represents optical power. From the spectrogram, only 6 light waves of the opened service are shown, and the rest are noise waves. At this time, since the number of optical waves of the opened service is small, the OA equipment needs to operate with a small power, which easily causes optical power drift and jitter of the opened service.

S202, the control device performs filtering processing on the preset optical noise signals to obtain a first optical wave and a second optical wave.

Wherein the first light wave and the second light wave have different frequencies.

As a possible implementation manner, the control device acquires a white noise signal, and performs power amplification on the white noise signal to obtain a preset optical noise signal. Further, the control device performs filtering processing on the preset optical noise signal through the wavelength selective switch WSS to obtain a first optical wave and a second optical wave.

For example, the control device may generate white noise with low power by spontaneous emission through two-stage OA cascade (such as the second OA (16) and the third OA (17) in fig. 5), where the first-stage OA (such as the second OA (16)) has no input, and the white noise is used as the input of the second-stage OA (such as the third OA (17)) and amplified by the second-stage OA to generate a flat high-power broad-spectrum light source as shown in fig. 10.

Further, referring to fig. 5, the broad spectrum light source is input through the main optical channel IN port of the WSS with the bidirectional structure, and odd waves (odd) and even waves (even) are filtered out through two lower wave dimension ports of DM1 and DM2, namely DM1 is set to block all even waves and allow the odd waves to pass through; DM2 is set to block all odd waves, allowing even waves to pass. Because WSS has the characteristic of grid adjustability, the spectral width of wavelength can be flexibly set according to the optical network parameter requirement, such as: the 200Gb/s system channels are 75GHz spaced, and the 400Gb/s system channels are 100GHz spaced. Fig. 11 shows an odd-numbered wave noise spectrum obtained by the WSS filter process, and fig. 12 shows an even-numbered wave noise spectrum obtained by the WSS filter process.

S203, the management and control device combines the first light wave and the second light wave to obtain a combined light wave.

As a possible implementation manner, the control device inputs the first light wave and the second light wave into the waveform integration channel, and outputs the combined light wave.

Illustratively, referring to FIG. 5, the parity waves are combined by the AM1, AM2 two up-wave dimension ports in the WSS, and the combined light wave is output through the main light channel OUT port as filled noise light. Fig. 13 shows a spectrum after the odd-even wave combination.

S204, the management and control device fills the combined light waves into each remaining wavelength channel respectively.

As a possible implementation, the managing means fills the combined light wave into each of the remaining wavelength channels via an optical coupler, respectively.

Illustratively, referring to fig. 5, the combined optical wave formed in S203 is filled into each of the remaining wavelength channels via an optical coupler to form a full wave transmission over the communication line.

Fig. 14 shows a spectrum diagram after filling the combined light wave into each remaining wavelength channel, and compared with the spectrum diagram of the light wave corresponding to the opened service shown in fig. 9, the waveform of the combined light wave is almost identical to the waveform of the signal light wave, so that the network can operate in a stable saturated state at the initial light load, and the system stability is improved.

Taking the 6-wave system as an example (the service channels are λ1-2, λ24-25, λ47-48, and 48 full), the single-wave optical power before noise light filling was monitored for 6 hours, and the results are shown in table 1.

TABLE 1 Power monitoring results of unfilled noise light

The single-wave optical power after filling with noise light was monitored for 6 hours, and the results are shown in table 2.

TABLE 2 Power monitoring results after filling with noise light

Fig. 15 shows the optical power variation before and after filling, and it can be seen that the signal optical power variation range is reduced by more than 0.2dB after filling the noise light in the 6-hour monitoring period.

In addition, when the system expands/withdraws from the network, the influence of the wave increasing and decreasing process on the optical power of other service channels is reduced. For example, still looking at the 6-wave system described above, the optical power monitoring is performed on the increasing/decreasing wave process: the service channels are lambda 1-2, lambda 24-25 and lambda 47-48 together with 6 waves, lambda 1-2 is closed in the test process, the optical power change conditions of lambda 24-25 and lambda 47-48 are inspected, and the test results are shown in fig. 16 and 17. Fig. 16 is a schematic diagram showing the influence of channel shutdown on optical power of other channels when noise light is not filled, and fig. 17 is a schematic diagram showing the influence of channel shutdown on optical power of other channels when noise light is filled. Test results show that when noise light is not filled, the front and back of lambda 1 and lambda 2 are closed, and the optical power of other channels is changed by more than 1 dB; after filling the noise light, the optical power of other channels changes by only 0.43dB before and after closing lambda 1 and lambda 2.

The technical scheme provided by the embodiment of the application at least brings the following beneficial effects: acquiring a wavelength channel occupied by an opened service in the optical communication system and a total wavelength channel of the optical communication system, and determining the rest wavelength channels of the optical communication system according to the wavelength channel occupied by the opened service and the total wavelength channel. Further, filtering the preset optical noise signal to obtain a first optical wave and a second optical wave; the first light wave and the second light wave have different frequencies; and combining the first light wave and the second light wave to obtain combined light waves, and filling the combined light waves into each residual wavelength channel respectively. The present application, through certain combinations and configurations, achieves noise-filled light that is nearly identical to the signal light waveform. Furthermore, by noise light filling, the optical communication system always works in a stable state of saturated output (namely, light wave transmission exists on all wavelength channels), so that the purpose of locking service light power is achieved, and the system is more stable.

The foregoing embodiments mainly describe the solutions provided in the embodiments of the present application from the perspective of the apparatus (device). It will be appreciated that, in order to implement the above-mentioned method, the apparatus or device includes hardware structures and/or software modules corresponding to each of the method flows, and these hardware structures and/or software modules corresponding to each of the method flows may constitute a material information determining apparatus. Those of skill in the art will readily appreciate that the algorithm steps of the examples described in connection with the embodiments disclosed herein may be implemented as hardware or a combination of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. 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 application.

The embodiment of the application may divide the functional modules of the apparatus or the device according to the above method example, for example, the apparatus or the device may divide each functional module corresponding to each function, or may integrate two or more functions into one processing module. The integrated modules may be implemented in hardware or in software functional modules. It should be noted that, in the embodiment of the present application, the division of the modules is schematic, which is merely a logic function division, and other division manners may be implemented in actual implementation.

Fig. 18 is a schematic structural view of a management and control apparatus according to an exemplary embodiment. Referring to fig. 18, a management and control device 30 provided in the embodiment of the present application includes an obtaining unit 301 and a processing unit 302.

An acquiring unit 301, configured to acquire a wavelength channel occupied by an opened service in the optical communication system and a total wavelength channel of the optical communication system, and determine a remaining wavelength channel of the optical communication system according to the wavelength channel occupied by the opened service and the total wavelength channel;

the processing unit 302 is configured to perform filtering processing on a preset optical noise signal to obtain a first optical wave and a second optical wave; the first light wave and the second light wave have different frequencies;

the processing unit 302 is further configured to combine the first optical wave and the second optical wave to obtain combined optical waves, and fill the combined optical waves into each remaining wavelength channel respectively.

Fig. 19 is a schematic structural diagram of a communication device provided in the present application. As shown in fig. 19, the communication device 40 may include at least one processor 401 and a memory 402 for storing processor executable instructions, wherein the processor 401 is configured to execute the instructions in the memory 402 to implement the optical communication method in the above-described embodiment.

In addition, the communication device 40 may also include a communication bus 403 and at least one communication interface 404.

The processor 401 may be a processor (central processing units, CPU), a microprocessor unit, ASIC, or one or more integrated circuits for controlling the execution of the programs of the present application.

Communication bus 403 may include a pathway to transfer information between the aforementioned components.

The communication interface 404 uses any transceiver-like device for communicating with other devices or communication networks, such as ethernet, radio access network (radio access network, RAN), wireless local area network (wireless local area networks, WLAN), etc.

The memory 402 may be, but is not limited to, a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (random access memory, RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (electrically erasable programmable read-only memory, EEPROM), compact disc-only memory (CD-ROM) or other optical disk storage, optical disk storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory may be implemented separately and coupled to the processor 401 via a bus. The memory may also be integrated with the processor 401.

The memory 402 is used for storing instructions for executing the embodiments of the present application, and the processor 401 controls the execution. The processor 401 is configured to execute instructions stored in the memory 402, thereby implementing the functions in the methods of the present application.

As an example, in connection with fig. 18, the acquisition unit 301 and the processing unit 302 in the management apparatus 30 realize the same functions as those of the processor 401 in fig. 19.

In a particular implementation, as one embodiment, processor 401 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 19.

In a particular implementation, as one embodiment, communication device 40 may include multiple processors, such as processor 401 and processor 407 in FIG. 19. Each of these processors may be a single-core (single-CPU) processor or may be a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

In a specific implementation, as an embodiment, the communication device 40 may further include an output device 405 and an input device 406. The output device 405 communicates with the processor 401 and may display information in a variety of ways. For example, the output device 405 may be a liquid crystal display (liquid crystaldisplay, LCD), a light emitting diode (light emitting diode, LED) display device, a Cathode Ray Tube (CRT) display device, or a projector (projector), or the like. The input device 406 is in communication with the processor 401 and may accept input of a user object in a variety of ways. For example, the input device 406 may be a mouse, keyboard, touch screen device, or sensing device, among others.

Those skilled in the art will appreciate that the structure shown in fig. 19 is not limiting of the communication device 40 and may include more or fewer components than shown, or may combine certain components, or may employ a different arrangement of components.

In addition, the present application also provides a computer-readable storage medium, which when executed by a processor of a communication device, enables the communication device to perform the optical communication method provided by the above-described embodiments.

In addition, the present application also provides a computer program product comprising computer instructions which, when run on a communication device, cause the communication device to perform an optical communication method as provided by the above embodiments.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

Claims

1. An optical communication method, applied to an optical communication system, comprising:

acquiring a wavelength channel occupied by an opened service in the optical communication system and a total wavelength channel of the optical communication system, and determining the rest wavelength channels of the optical communication system according to the wavelength channel occupied by the opened service and the total wavelength channel;

filtering the preset optical noise signal to obtain a first optical wave and a second optical wave; the first light wave and the second light wave have different frequencies;

and combining the first light wave and the second light wave to obtain combined light waves, and filling the combined light waves into each residual wavelength channel respectively.

2. The method of optical communication of claim 1, wherein the method further comprises:

and acquiring a white noise signal, and performing power amplification on the white noise signal to obtain the preset optical noise signal.

3. The optical communication method according to claim 1, wherein the filtering the preset optical noise signal to obtain the first optical wave and the second optical wave includes:

and filtering the preset optical noise signal through a wavelength selective switch WSS to obtain the first optical wave and the second optical wave.

4. The method of claim 3, wherein the WSS comprises a first filtering channel and a second filtering channel; the filtering processing is performed on the preset optical noise signal by the wavelength selective switch WSS to obtain the first optical wave and the second optical wave, including:

inputting the preset optical noise signal into the first filtering channel to obtain the first optical wave;

and inputting the preset optical noise signal into the second filtering channel to obtain the second optical wave.

5. The optical communication method of claim 4, wherein the WSS further comprises a waveform integration channel; combining the first light wave and the second light wave to obtain a combined light wave, including:

and inputting the first light wave and the second light wave into the waveform integration channel and outputting the combined light wave.

6. The method of claim 1, wherein said filling each of said remaining wavelength channels with said combined light waves, respectively, comprises:

and filling the combined light waves into each residual wavelength channel through an optical coupler.

7. An optical communication system, characterized in that the optical communication system comprises a first optical conversion unit OTU, a second OTU, a wavelength selective switch WSS, an optical coupler and a first optical amplifier OA;

the first OTU is connected with the input interface of the optical coupler, the WSS is connected with the input interface of the optical coupler, the output interface of the optical coupler is connected with the input interface of the first OA, and the output interface of the first OA is connected with the second OTU.

8. The optical communication system according to claim 7, wherein the number of the first OA is plural, and each of the first OA is connected in series.

9. The optical communication system of claim 8, wherein the optical communication system comprises a second OA and a third OA; the output interface of the second OA is connected with the input interface of the third OA; the output interface of the third OA is connected with the input interface of the WSS.

10. The optical communication system of claim 9, wherein the WSS is coupled to an input interface of the optical coupler, comprising:

an output interface of the WSS is connected with an input interface of the optical coupler.

11. The optical communication system of claim 10, wherein the WSS further comprises a first filtering channel and a second filtering channel; the grid characteristics of the first filter channel are different from the grid characteristics of the filter channel.

12. The optical communication system according to claim 7, wherein the number of the first OTUs is plural, and each of the first OTUs is connected in parallel.

13. The optical communication system of claim 12, further comprising an optical multiplexer/demultiplexer; the first OTU is connected with an input interface of the optical coupler, and includes:

each first OTU is connected to an input interface of the optical coupler through the optical multiplexer/demultiplexer.

14. The optical communication system according to claim 7, wherein the number of the second OTUs is plural, and each of the second OTUs is connected in parallel.

15. The optical communication system of claim 14, further comprising an optical multiplexer/demultiplexer; the output interface of the first OA is connected with the second OTU, and includes:

the output interface of the first OA is connected with each second OTU through the optical multiplexer/demultiplexer.

16. A communication device, comprising: a processor, a memory for storing instructions executable by the processor; wherein the processor is configured to execute instructions to implement the optical communication method of any one of claims 1-6.

17. A computer readable storage medium having instructions stored thereon, which, when executed by a processor of a communication device, enable the communication device to perform the optical communication method of any of claims 1-6.