Optical communication methods, systems, communication equipment and storage media

Abstract

This application provides an optical communication method, system, communication device, and storage medium, relating to the field of communication technology, for ensuring the stability of optical power during optical signal transmission, thereby improving the transmission performance of the optical communication system. The method includes: acquiring the wavelength channels occupied by activated services and the total wavelength channels of the optical communication system; determining the remaining wavelength channels of the optical communication system based on the wavelength channels occupied by activated services and the total wavelength channels; filtering a preset optical noise signal to obtain a first optical wave and a second optical wave; the first optical wave and the second optical wave have different frequencies; merging the first optical wave and the second optical wave to obtain a merged optical wave, and filling the merged optical wave into each of the remaining wavelength channels.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to an optical communication method, system, communication device and storage medium. Background Technology

[0002] High capacity and long distance have always been important directions for the evolution of optical transmission systems. For example, current Optical Transport Network (OTN) systems or Wavelength Division Multiplexing (WDM) systems commonly use coherent optical communication technology. Fiber loss is the main factor limiting the transmission distance without electrical repeaters in coherent optical communication technology. To compensate for fiber loss, an optical amplifier (OA) needs to be placed at each fiber span to compensate for the loss in that fiber span.

[0003] However, each time the optical signal passes through an OA amplification stage, it causes a loss of optical power, resulting in a deterioration of the system's optical signal-to-noise ratio (OSNR) and a decrease in transmission performance. Summary of the Invention

[0004] This application provides an optical communication method, system, communication device, and storage medium to ensure the stability of optical power during optical signal transmission, thereby improving the transmission performance of the optical communication system.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] In a first aspect, an optical communication method is provided, applied to an optical communication system. The method includes: acquiring the wavelength channels occupied by activated services and the total wavelength channels of the optical communication system, and determining the remaining wavelength channels of the optical communication system based on the wavelength channels occupied by activated services and the total wavelength channels; filtering a preset optical noise signal to obtain a first optical wave and a second optical wave; the first optical wave and the second optical wave have different frequencies; merging the first optical wave and the second optical wave to obtain a merged optical wave, and filling the merged optical wave into each of the remaining wavelength channels.

[0007] Optionally, the method further includes: acquiring a white noise signal and amplifying the power of the white noise signal to obtain a preset optical noise signal.

[0008] Optionally, the preset optical noise signal is filtered to obtain a first optical wave and a second optical wave, including: filtering the preset optical noise signal through a wavelength selection switch (WSS) to obtain a first optical wave and a second optical wave.

[0009] Optionally, the WSS includes a first filtering channel and a second filtering channel; the preset optical noise signal is filtered by the wavelength selection switch WSS to obtain a first optical wave and a 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.

[0010] Optionally, the WSS also includes a waveform integration channel; merging the first light wave and the second light wave to obtain a merged light wave, including: inputting the first light wave and the second light wave into the waveform integration channel and outputting the merged light wave.

[0011] Optionally, the combined optical waves are filled into each of the remaining wavelength channels, including: filling each of the remaining wavelength channels with the combined optical waves through an optical coupler.

[0012] Secondly, an optical communication system is provided, comprising a first optical conversion unit (OTU), a second OTU, a wavelength selective switch (WSS), an optical coupler, and a first optical amplifier (OA); wherein the first OTU is connected to the input interface of the optical coupler, the WSS is connected to the input interface of the optical coupler, the output interface of the optical coupler is connected to the input interface of the first OA, and the output interface of the first OA is connected to the second OTU.

[0013] Optionally, there may be multiple first OAs, which are connected serially to each other.

[0014] Optionally, the optical communication system includes a second OA and a third OA; the output interface of the second OA is connected to the input interface of the third OA; the output interface of the third OA is connected to the input interface of the WSS.

[0015] Optionally, the WSS is connected to the input interface of the optocoupler, including: the output interface of the WSS is connected to the input interface of the optocoupler.

[0016] Optionally, the WSS may also include a first filter channel and a second filter channel; the raster characteristics of the first filter channel are different from those of the filter channels.

[0017] Optionally, there may be multiple first OTUs, which are connected in parallel.

[0018] Optionally, the optical communication system also includes an optical combiner / demultiplexer; the first OTU is connected to the input interface of the optical coupler, including: each first OTU is connected to the input interface of the optical coupler through the optical combiner / demultiplexer.

[0019] Optionally, there may be multiple second OTUs, which are connected in parallel.

[0020] Optionally, the optical communication system also includes an optical combiner / demultiplexer; the output interface of the first OA is connected to the second OTU, including: the output interface of the first OA is connected to each of the second OTUs through the optical combiner / demultiplexer.

[0021] Thirdly, a communication device is provided, comprising: a processor and a memory for storing processor-executable instructions; wherein the processor is configured to execute instructions to implement the optical communication method of the first aspect described above.

[0022] Fourthly, a computer-readable storage medium is provided, on which instructions are stored, such that when the instructions in the computer-readable storage medium are executed by a processor of a communication device, the communication device is able to perform the optical communication method as described in the first aspect above.

[0023] The technical solution provided in this application provides at least the following beneficial effects: It obtains the wavelength channels occupied by activated services and the total wavelength channels of the optical communication system, and determines the remaining wavelength channels of the optical communication system based on these data. Furthermore, a preset optical noise signal is filtered to obtain a first optical wave and a second optical wave; the first and second optical waves have different frequencies; the first and second optical waves are combined to obtain a combined optical wave, which is then filled into each of the remaining wavelength channels. This application obtains noise-filled light that is almost identical to the signal light waveform through certain combinations and configurations. Furthermore, through noise-filled light, the optical communication system always operates in a stable state of saturated output (i.e., optical waves are transmitted on all wavelength channels), thereby achieving the purpose of locking the service optical power and making the system more stable. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This application provides a schematic diagram of a point-to-point open optical network transmission according to an embodiment of the present application;

[0026] Figure 2 An example diagram of a light detection point provided in an embodiment of this application;

[0027] Figure 3 An optical power monitoring graph provided in an embodiment of this application;

[0028] Figure 4This is one of the structural schematic diagrams of an optical communication system provided in an embodiment of this application;

[0029] Figure 5 This is a second schematic diagram of the structure of an optical communication system provided in an embodiment of this application;

[0030] Figure 6 This is a schematic diagram of the working principle of the wavelength selective switch provided in the embodiments of this application;

[0031] Figure 7 This is a functional schematic diagram of the wavelength selection switch provided in the embodiments of this application;

[0032] Figure 8 A flowchart illustrating an optical communication method provided in an embodiment of this application;

[0033] Figure 9 The spectral diagram of the light wave corresponding to the activated service provided in the embodiments of this application;

[0034] Figure 10 The spectrum provided in this application is amplified by a second-stage OA.

[0035] Figure 11 The odd-numbered wave noise spectrum obtained by WSS filtering is provided in the embodiments of this application;

[0036] Figure 12 The even-wave noise spectrum obtained by WSS filtering is provided in the embodiments of this application;

[0037] Figure 13 The spectrum of odd and even waves after merging is provided in the embodiments of this application;

[0038] Figure 14 The spectrum of the combined light waves provided in the embodiments of this application;

[0039] Figure 15 This is a schematic diagram illustrating the range of optical power variation before and after filling, provided in an embodiment of this application.

[0040] Figure 16 This is a schematic diagram illustrating the impact of channel shutdown on the optical power of other channels when there is no filled noise light, as provided in an embodiment of this application.

[0041] Figure 17 A schematic diagram illustrating the impact of channel shutdown after filling noise light on the optical power of other channels, provided in an embodiment of this application.

[0042] Figure 18 This is a schematic diagram of the structure of a control device provided in an embodiment of this application;

[0043] Figure 19 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application. Detailed Implementation

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0045] It should be noted that in the embodiments of this application, the words "exemplary" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design schemes. Specifically, the use of the words "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0046] It should also be noted that in the embodiments of this application, "of", "corresponding", and "corresponding" can sometimes be used interchangeably. It should be pointed out that when their differences are not emphasized, their meanings are consistent.

[0047] To facilitate a clear description of the technical solutions of the embodiments of this application, the terms "first" and "second" are used in the embodiments of this application to distinguish the same or similar items with essentially the same function and effect. Those skilled in the art can understand that the terms "first" and "second" are not intended to limit the quantity or execution order.

[0048] Before providing a detailed explanation of the embodiments of this application, some related technologies involved in the embodiments of this application will be introduced first.

[0049] High capacity and long distance have always been important evolutionary directions for optical transmission systems. Currently, Optical Transport Network (OTN) systems or Wavelength Division Multiplexing (WDM) systems commonly employ coherent optical communication technology. Fiber loss is the main factor limiting the transmission distance without electrical repeaters in coherent optical communication. To compensate for fiber loss, an optical amplifier (OA) must be placed at each fiber optic span to compensate for the loss in that span.

[0050] For example, such as Figure 1The diagram illustrates a point-to-point open optical network transmission, where the open line system can connect different terminal devices (e.g., optical transport units (OTUs) from different manufacturers). A multiplexer / demultiplexer at the source end combines optical signals from OTUs from different manufacturers and couples them into the optical cable. After transmitting a certain distance, the optical power is attenuated, requiring an optical amplifier (OA) to restore the optical power to its original level. After multiple stages of transmission and amplification, the signal reaches the destination end and is received by the OTU.

[0051] The above transmission process introduces noise, which degrades the performance of the optical network. When the performance falls below the threshold of the receiver, the system will generate bit errors, leading to information transmission failure.

[0052] Currently, open optical networks are mainly used for data center interconnection and metropolitan area network transmission, covering short distances with relatively low system performance requirements. With technological advancements, open optical networks will gradually enter the long-distance transmission field. In long-distance optical networks, signal optical power is a crucial factor affecting transmission performance. When optical power fluctuates, drifts, or becomes unstable, it is highly susceptible to bit errors after being amplified by multiple stages of optical open circuits (OA). Therefore, ensuring stable optical power for each channel is a very important technical measure for optical communication systems.

[0053] Currently, the common method for compensating for span loss is to use an optical power monitoring unit to monitor the optical power of each fiber span and feed the monitoring results back to power adjustment nodes such as gain flattening filters, adjustable attenuation multiplexers, or optical amplifiers, so that the power adjustment nodes can adjust the optical power of the fiber span.

[0054] For example, such as Figure 2 The diagram illustrates an example of an optical detection point. A monitoring point is located at the output of the OA (Optical Availability Unit) to monitor the optical power of each channel. When a change or drift in optical power is detected, the transmit optical power of the OTU (Optical Transmitter Unit) is adjusted to ensure stable optical power along the optical cable line.

[0055] However, in the early stages of project construction, when the service channels are not fully configured, the OA equipment needs to operate at lower power, which can easily lead to optical power drift and jitter. For example, Figure 3 As shown, a 6-hour long-term monitoring of the single-wavelength optical power of a 400Gb / s optical transmission system revealed that when the number of channels was small, the optical power exhibited an unstable state and a gradual upward drift trend.

[0056] Furthermore, when there are few service channels in the system, the uplink and downlink processes can also affect the optical power of other channels. In open optical networks, terminal equipment and line systems come from different manufacturers. Because it is difficult to strictly unify all parameters, the monitoring and adjustment of the network by the control system often cannot reach the same level as a system from a single manufacturer, mainly in terms of accuracy and real-time performance.

[0057] It is evident that the fewer the number of active service channels and the more OAs (Optical Access Centers), the larger the range of optical power jitter, and the more prone it is to bit errors at the receiving end. Therefore, it is necessary to design an optical power stabilization scheme.

[0058] In view of this, this application provides an optical communication method that, by filling the empty channels with optical power, enables the OA to operate in a state of near-saturation of output optical power, thereby achieving the purpose of locking the service optical power and making the system more stable.

[0059] The optical communication method provided in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0060] Figure 4 An exemplary application scenario diagram provided by an embodiment of this application is shown. For example... Figure 4 As shown, the optical communication method provided in this application embodiment can be applied to an optical communication system 10. The optical communication system 10 includes a first optical conversion unit (OTU) (11), a second OTU (12), a wavelength selection switch (WSS) (13), an optical coupler (OC) (14), and a first optical amplifier (OA) (15); wherein, the first OTU (11) is connected to the input interface of the optical coupler (14), the WSS (13) is connected to the input interface of the optical coupler (14), the output interface of the optical coupler (14) is connected to the input interface of the first OA (15), and the output interface of the first OA (15) is connected to the second OTU (12).

[0061] Optional, such as Figure 5 As shown, there are multiple first OAs (15), and each first OA is connected in series.

[0062] In practical applications, the number of first OAs (15) can be flexibly set according to the transmission distance. After the signal is amplified by a first OA, it loses some signal after a certain transmission distance before entering the next second OA for amplification, thereby ensuring that the signal can reach the second OTU (12) smoothly.

[0063] Optional, such as Figure 5As shown, the optical communication system 10 includes a second OA (16) and a third OA (17). The output interface of the second OA (16) is connected to the input interface of the third OA (17); the output interface of the third OA (17) is connected to the input interface of the WSS (13).

[0064] Optional, such as Figure 5 As shown, the output interface of WSS (13) is connected to the input interface of the optocoupler (14).

[0065] Optional, such as Figure 5 As shown, WSS(13) also includes a first filtering channel and a second filtering channel; wherein the raster features of the first filtering channel are different from the raster features of the filtering channel.

[0066] Optional, such as Figure 5 As shown, there are multiple first OTUs (11), and each first OTU is connected in parallel.

[0067] Optional, such as Figure 5 As shown, the optical communication system 10 also includes an optical combiner / demultiplexer (18). Each first OTU (11) is connected to the input interface of the optical coupler (14) through the optical combiner / demultiplexer (18).

[0068] Optional, such as Figure 5 As shown, there are multiple second OTUs (12), and each second OTU (12) is connected in parallel. The output interface of the first OA (15) is connected to each second OTU (12) through an optical splitter (18).

[0069] It should be noted that the wavelength selection switch (WSS) is the core device of the next-generation reconfigurable optical add-drop multiplexer (ROADM) technology. It adopts free-space optical switching technology, which can provide wavelength-granular channels in all directions, support remote reconfiguration of all through ports and add / drop ports, support add / drop of any wavelength from any port, and support reconfiguration of line and local add / drop wavelengths.

[0070] Figure 6 The basic working principle of a wavelength selective switch (WSS) is illustrated. After receiving an optical signal, the WSS device demultiplexes the various wavelengths according to their spatial positions. The wavelength selection unit, through a liquid crystal on silicon (LCOS), can change the phase of a specific wavelength as needed, thereby adjusting the attenuation and switching functions of each wavelength.

[0071] Taking a 9-dimensional WSS device as an example, such as Figure 7As shown, after the signal light enters the WSS device through the left port, each wavelength is demultiplexed according to its spatial position and assigned to nine different ports for output. The number of wavelengths and wavelength sequence number output by each port are adjustable.

[0072] The following is combined Figure 4 The optical communication system shown illustrates the optical communication method provided in the embodiments of this application.

[0073] Figure 8 This is a flowchart illustrating an optical communication method according to some exemplary embodiments. In some embodiments, the above-described optical communication method can be applied to, for example... Figure 4 The optical communication system shown can also be applied to other similar communication systems.

[0074] like Figure 8 As shown, the optical communication method provided in this application includes the following S201-S204.

[0075] S201. Obtain the wavelength channels occupied by the activated services in the optical communication system and the total wavelength channels of the optical communication system, and determine the remaining wavelength channels of the optical communication system based on the wavelength channels occupied by the activated services and the total wavelength channels.

[0076] As one possible implementation, the control device obtains the wavelength channels occupied by activated services in the optical communication system and the total wavelength channels of the optical communication system. Further, the control device subtracts the wavelength channels occupied by activated services from the total wavelength channels of the optical communication system to obtain the remaining wavelength channels of the optical communication system.

[0077] In practical applications, control devices can be deployed in Figure 4 In the optical communication system shown, a management and control device is used to manage and control the optical communication system. This management and control device can be any communication device with management and control functions; the specific form of the management and control device is not limited in the embodiments of this application.

[0078] It should be noted that the total number of wavelength channels in an optical communication system refers to the maximum number of wavelength channels that the system can support. This number is configured based on the actual situation of the optical communication system. For example, in a 400Gb / s system, a full configuration would have 48 wavelength channels. Assuming that the wavelength channels occupied by activated services are λ1~2, λ24~25, and λ47~48, then the remaining wavelength channels (λ3~23, λ26~46) are temporarily unused and are referred to as the remaining wavelength channels.

[0079] Figure 9The image shows the spectrum of the optical waves corresponding to the aforementioned activated services. The horizontal axis represents wavelength, and the vertical axis represents optical power. The spectrum shows that only six optical waves are activated, with the rest being noise waves. Because the number of activated optical waves is small, the OA equipment needs to operate at lower power, which can easily cause power drift and jitter in the activated services.

[0080] S202. The control device filters the preset optical noise signal to obtain the first optical wave and the second optical wave.

[0081] The first light wave and the second light wave have different frequencies.

[0082] As one possible implementation, the control device acquires a white noise signal and amplifies its power to obtain a preset optical noise signal. Further, the control device filters the preset optical noise signal using a wavelength selective switch (WSS) to obtain a first optical wave and a second optical wave.

[0083] For example, the control device can be cascaded through two levels of OA (such as...). Figure 5 The second OA (16) and the third OA (17) in the first stage OA (such as the second OA (16)) have no input. They generate low-power white noise through spontaneous emission, which serves as the input to the second stage OA (such as the third OA (17)). After being amplified by the second stage OA, they generate white noise as shown in the figure. Figure 10 The flat, high-power broadband light source shown is illustrated.

[0084] Further reference Figure 5 A broadband light source is input through the main optical channel IN port of the bidirectional WSS. Odd and even wavelengths are filtered out by the two lower wavelength ports DM1 and DM2. Specifically, DM1 is set to block all even wavelengths while allowing odd wavelengths to pass; DM2 is set to block all odd wavelengths while allowing even wavelengths to pass. Because the WSS has an adjustable grid, the wavelength spectral width can be flexibly set according to the optical network parameter requirements, such as a 75GHz spacing for a 200Gb / s system and a 100GHz spacing for a 400Gb / s system. Figure 11 The spectrum of odd-numbered wave noise obtained by WSS filtering is shown. Figure 12 The even-wave noise spectrum obtained by WSS filtering is shown.

[0085] S203. The control device merges the first light wave and the second light wave to obtain a merged light wave.

[0086] As one possible implementation, the control device integrates the input waveforms of the first and second light waves into a single channel and outputs a combined light wave.

[0087] For example, refer to Figure 5 The odd and even waves are merged by the AM1 and AM2 upwave ports in the WSS, and the merged light wave is output through the OUT port of the main optical channel as filling noise light. Figure 13 The spectrum after combining odd and even waves is shown.

[0088] S204. The control device will fill the remaining wavelength channels with the merged light waves.

[0089] As one possible implementation, the control device will combine the light waves and fill them into the remaining wavelength channels via optical couplers.

[0090] For example, refer to Figure 5 The combined light wave generated by S203 is filled into each remaining wavelength channel through an optical coupler, forming full-wave transmission on the communication line.

[0091] Figure 14 The spectrum is shown after the combined light waves are filled into each of the remaining wavelength channels, compared to... Figure 9 The spectrum of the optical wave corresponding to the activated service is shown. The waveform of the merged optical wave is almost identical to the waveform of the signal optical wave. In this way, the network can operate in a stable saturation state even under light load in the early stage, thus improving system stability.

[0092] Taking the above-mentioned 6-wave system as an example (service channels are λ1~2, λ24~25, λ47~48, with a full configuration of 48 waves), the single-wave optical power before filling noise light was monitored for 6 hours, and the results are shown in Table 1.

[0093] Table 1 Power monitoring results of unfilled noise light

[0094]

[0095] The power of the single-wavelength light after filling with noise was monitored for 6 hours, and the results are shown in Table 2.

[0096] Table 2 Power monitoring results after filling with noise light

[0097]

[0098] Figure 15 The changes in optical power before and after filling are shown. It can be seen that, within a 6-hour monitoring period, the range of signal optical power changes decreased by more than 0.2 dB after filling with noisy light.

[0099] In addition, during system expansion / decommissioning, the impact of waveform addition / reduction processes on the optical power of other service channels should be reduced. For example, still examining the aforementioned 6-wavelength system, optical power monitoring is performed during waveform addition / reduction processes: the service channels are λ1~2, λ24~25, and λ47~48 (6 channels in total). During the test, λ1~2 is turned off, and the optical power changes of λ24~25 and λ47~48 are observed. The test results are as follows. Figure 16 , Figure 17 As shown. Among them, Figure 16 This diagram illustrates the impact of channel shutdown on the optical power of other channels when no noise fills the channel. Figure 17 The effect of closing a waveguide after filling with noise light on the optical power of other wavesguides was investigated. Test results showed that without filling with noise light, the optical power of other wavesguides changed by more than 1 dB before and after closing λ1 and 2; after filling with noise light, the optical power of other wavesguides changed by only 0.43 dB before and after closing λ1 and 2.

[0100] The technical solution provided in this application provides at least the following beneficial effects: It obtains the wavelength channels occupied by activated services and the total wavelength channels of the optical communication system, and determines the remaining wavelength channels of the optical communication system based on these wavelength channels. Further, a preset optical noise signal is filtered to obtain a first optical wave and a second optical wave; the first and second optical waves have different frequencies; the first and second optical waves are combined to obtain a combined optical wave, which is then filled into each of the remaining wavelength channels. This application obtains noise-filled light that is almost identical to the signal light waveform through certain combinations and configurations. Furthermore, by filling with noise light, the optical communication system always operates in a stable state of saturated output (i.e., light waves are transmitted on all wavelength channels), thereby achieving the purpose of locking the service optical power and making the system more stable.

[0101] The above embodiments mainly describe the solutions provided by the embodiments of this application from the perspective of an apparatus (device). It is understood that, in order to implement the above methods, the apparatus or device includes hardware structures and / or software modules corresponding to the execution of each method flow. These hardware structures and / or software modules corresponding to the execution of each method flow can constitute a material information determination apparatus. Those skilled in the art should readily recognize that, in conjunction with the algorithm steps of the various examples described in the embodiments of the invention herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in a hardware or computer software-driven hardware manner depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0102] This application embodiment can divide the device or equipment into functional modules according to the above method examples. For example, the device or equipment can be divided into functional modules corresponding to each function, or two or more functions can be integrated into one processing module. The integrated module can be implemented in hardware or as a software functional module. It should be noted that the module division in this application embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods.

[0103] Figure 18 This is a schematic diagram illustrating the structure of a control device according to an exemplary embodiment. (Refer to...) Figure 18 As shown, the control device 30 provided in this application embodiment includes an acquisition unit 301 and a processing unit 302.

[0104] The acquisition unit 301 is used to acquire the wavelength channels occupied by the activated services in the optical communication system and the total wavelength channels of the optical communication system, and to determine the remaining wavelength channels of the optical communication system based on the wavelength channels occupied by the activated services and the total wavelength channels.

[0105] Processing unit 302 is used to filter a preset optical noise signal to obtain a first optical wave and a second optical wave; the first optical wave and the second optical wave have different frequencies;

[0106] The processing unit 302 is also used to merge the first light wave and the second light wave to obtain a merged light wave, and to fill the merged light wave into each of the remaining wavelength channels respectively.

[0107] Figure 19 This is a schematic diagram of the structure of a communication device provided in this application. Figure 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 embodiments.

[0108] In addition, the communication device 40 may also include a communication bus 403 and at least one communication interface 404.

[0109] Processor 401 may be a processor (central processing unit, CPU), microprocessor unit, ASIC, or one or more integrated circuits for controlling the execution of programs according to the present application.

[0110] The communication bus 403 may include a path for transmitting information between the aforementioned components.

[0111] Communication interface 404 uses any transceiver-like device for communicating with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc.

[0112] The memory 402 may be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but not limited thereto. The memory may exist independently and be connected to the processor 401 via a bus. The memory may also be integrated with the processor 401.

[0113] The memory 402 stores instructions for executing the scheme of this application, and the processor 401 controls the execution. The processor 401 executes the instructions stored in the memory 402 to realize the functions of the method of this application.

[0114] As an example, combined Figure 18 The functions implemented by the acquisition unit 301 and the processing unit 302 in the control device 30 are the same as those of the acquisition unit 301 and the processing unit 302. Figure 19 The processor 401 in it has the same function.

[0115] In a specific implementation, as one example, processor 401 may include one or more CPUs, for example... Figure 19 CPU0 and CPU1 in the CPU.

[0116] In a specific implementation, as one example, the communication device 40 may include multiple processors, such as... Figure 19Processors 401 and 407 are described herein. Each of these processors may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. A processor here may refer to one or more devices, circuits, and / or processing cores used to process data (e.g., computer program instructions).

[0117] In a specific implementation, as one 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 can display information in various ways. For example, the output device 405 may be a liquid crystal display (LCD), a light-emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector, etc. The input device 406 communicates with the processor 401 and can accept input from user objects in various ways. For example, the input device 406 may be a mouse, keyboard, touchscreen device, or sensing device, etc.

[0118] Those skilled in the art will understand that Figure 19 The structure shown does not constitute a limitation on the communication device 40, and may include more or fewer components than shown, or combine certain components, or use different component arrangements.

[0119] In addition, this application also provides a computer-readable storage medium that, when the instructions in the computer-readable storage medium are executed by the processor of a communication device, enables the communication device to perform the optical communication method provided in the above embodiments.

[0120] In addition, this application also provides a computer program product, including computer instructions, which, when executed on a communication device, cause the communication device to perform the optical communication method provided in the above embodiments.

[0121] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention described herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not invented herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the claims.

Claims

1. An optical communication method, characterized in that, Applied to optical communication systems, the method includes: The wavelength channels occupied by the activated services in the optical communication system and the total wavelength channels of the optical communication system are obtained, and the remaining wavelength channels of the optical communication system are determined based on the wavelength channels occupied by the activated services and the total wavelength channels. A white noise signal is acquired and amplified to obtain a preset optical noise signal. The white noise signal is generated by spontaneous emission from a first-stage optical amplifier OA. The preset optical noise signal is obtained by amplifying the white noise signal from a second-stage OA. The first-stage OA and the second-stage OA are cascaded OAs. The preset optical noise signal is input into the first filter channel of a wavelength switch WSS to obtain a first optical wave, and the preset optical noise signal is input into the second filter channel of the WSS to obtain a second optical wave. The first optical wave and the second optical wave are an odd-numbered wave and an even-numbered wave filtered by the WSS through two lower wavelength ports. The first optical wave and the second optical wave have different frequencies. The first and second light waves are input into the waveform integration channel of the WSS, and a combined light wave is output. The combined light wave is filled into each remaining wavelength channel through an optical coupler to form full-wave transmission on the communication line.

2. An optical communication system, characterized in that, The optical communication system includes a first optical conversion unit (OTU), a second OTU, a wavelength selective switch (WSS), an optical coupler, and a first optical amplifier (OA), a second optical amplifier (OA), and a third optical amplifier (OA). There are multiple first OAs, and each first OA is connected in series. The output interface of the second OA is connected to the input interface of the third OA; The output interface of the third OA is connected to the input interface of the WSS; There are multiple first OTUs, and each first OTU is connected in parallel. There are multiple second OTUs, and each second OTU is connected in parallel. The WSS further includes a first filtering channel and a second filtering channel; the grid characteristics of the first filtering channel are different from those of the filtering channel; the optical communication system further includes an optical combiner / demultiplexer; the first OTU is connected to the input interface of the optical coupler through the optical combiner / demultiplexer; the output interface of the first OA is connected to each of the second OTUs through the optical combiner / demultiplexer; the output interface of the WSS is connected to the input interface of the optical coupler, the output interface of the optical coupler is connected to the input interface of the first OA, and the output interface of the first OA is connected to the second OTU; The WSS is used to: input a preset optical noise signal into a first filtering channel to obtain a first optical wave, and input the preset optical noise signal into a second filtering channel to obtain a second optical wave; the first optical wave and the second optical wave are the odd wave and even wave filtered by the WSS through two lower wave dimension ports; input the first optical wave and the second optical wave into the waveform integration channel of the WSS to obtain a combined optical wave; the combined optical wave is used to fill the remaining wavelength channels of the optical communication system through an optical coupler to form full-wave transmission on the communication line.

3. A communication device, characterized in that, include: A processor and a memory for storing instructions executable by the processor; wherein the processor is configured to execute instructions to implement the optical communication method of claim 1.

4. A computer-readable storage medium storing instructions thereon, characterized in that, When the instructions in the computer-readable storage medium are executed by the processor of the communication device, the communication device is able to perform the optical communication method as described in claim 1.

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