Optical signal processing method and network device

Abstract

A method for processing optical signals includes: a first network device sending a multi-wavelength optical signal to a second network device, receiving power values of at least two wavelength signals sent by the second network device, determining a power average value according to the power values of the at least two wavelength signals, determining a plurality of power difference values according to the power values of the at least two wavelength signals and the power average value, determining a target wavelength signal corresponding to a target power difference value when the plurality of power difference values includes the target power difference value, and adjusting a preset transmission power of the target wavelength signal to a target transmission power according to the target power difference value. The method can correct the transmission power of the wavelength signal according to the power values of the wavelength signals fed back by the next network device, thereby reducing the power flatness of the plurality of wavelength signals.

Description

Technical Field

[0001] This application relates to the field of optical communications, and in particular to optical signal processing methods and network devices. Background Technology

[0002] In optical communication technology, multiple wavelength signals may have different power gains when passing through the same device. Optical power flatness refers to the difference between the maximum and minimum power values ​​for multiple wavelength signals. When the power flatness of multiple wavelength signals is too large, crosstalk may occur between them.

[0003] based on Figure 1 The optical communication system shown currently employs a method to reduce power flatness, roughly as follows: Transmitting device 11 sends multi-wavelength optical signals to an arrayed waveguide grating (AWG) 121. The AWG 121 splits the multi-wavelength optical signals into multiple wavelength signals. A variable optical attenuator (VOA) 122 adjusts each wavelength signal, and a photodiode (PD) 123 detects the power of each wavelength signal. When the power of each wavelength signal is inconsistent, the variable optical attenuator 122 is adjusted until the power of each wavelength signal is consistent. When the power of each wavelength signal is consistent, the arrayed waveguide grating 124 combines the multiple wavelength signals. Finally, an amplifier 125 amplifies the combined signal and sends it to receiving device 13.

[0004] In the above method, the power gain of each wavelength signal is affected when the arrayed waveguide grating is combined. If the power flatness of multiple wavelength signals is too large, crosstalk will occur between the multiple wavelength signals in amplifier 125. Summary of the Invention

[0005] In view of this, this application provides an optical signal processing method and a network device that can correct the transmission power of a wavelength signal based on the received power value of the wavelength signal fed back by the next network device, thereby reducing the power flatness of multiple wavelength signals in the next network device.

[0006] A first aspect provides an optical signal processing method, comprising: a first network device transmitting multi-wavelength optical signals to a second network device, receiving the received power values ​​of at least two wavelength signals transmitted by the second network device, determining an average power value based on the received power values ​​of the at least two wavelength signals, determining multiple power differences based on the received power values ​​and the average power value of the at least two wavelength signals, determining a target wavelength signal corresponding to the target power difference from the at least two wavelength signals when the multiple power differences include a target power difference, and adjusting a preset transmission power of the target wavelength signal to a target transmission power based on the target power difference. The first network device and the second network device are adjacent to each other. In this implementation, the first network device can determine multiple power differences based on the received power values ​​and the average power value of the at least two wavelength signals, select a target power difference from the multiple power differences, where the target power difference is a power difference greater than or equal to a preset threshold among the multiple power differences. Then, the transmission power of the target wavelength signal is adjusted based on the target power difference to reduce the difference between the received power values ​​of the target wavelength signal and the received power values ​​of other wavelength signals. This reduces the power flatness of the multiple wavelength signals in the second network device, thereby reducing crosstalk between the wavelength signals in the second network device.

[0007] In one possible implementation, the first network device adjusting the preset transmit power of the target wavelength signal to the target transmit power based on the target power difference includes: the first network device determining that the target transmit power is equal to the preset transmit power of the target wavelength signal minus the target power difference, and adjusting the preset transmit power of the target wavelength signal to the target transmit power. The target power difference represents the deviation between the received power value of the target wavelength signal and the average power value. After adjusting the transmit power of the target wavelength signal based on the target power difference, the received power value of the target wavelength signal can be made close to or equal to the average power value.

[0008] In another possible implementation, the first network device adjusting the preset transmit power of the target wavelength signal to the target transmit power based on the target power difference includes: the first network device determining an adjustment current value for the target wavelength signal based on the target power difference, and adjusting the preset transmit power of the target wavelength signal to the target transmit power based on the adjustment current value. After adjusting the preset transmit power of the target wavelength signal to the target transmit power, the received power value of the target wavelength signal can be made close to or equal to the average power value.

[0009] In another possible implementation, the first network device is a base station, and the second network device is an in-site aggregation unit.

[0010] In another possible implementation, both the first network device and the second network device are intra-site aggregation units.

[0011] In another possible implementation, the first network device is an in-site aggregation unit, and the second network device is a base station.

[0012] A second aspect provides an optical signal processing method, comprising: a second network device receiving a multi-wavelength optical signal transmitted by a first network device; obtaining received power values ​​of at least two wavelength signals based on the multi-wavelength optical signal; and transmitting the received power values ​​of the at least two wavelength signals to the first network device. The second network device can feed back the received power values ​​of the at least two wavelength signals to the first network device, enabling the first network device to determine a target wavelength signal and adjust the transmission power of the target wavelength signal based on the received power values, such that the received power of the target wavelength signal in the multi-wavelength optical signal received by the second network device is close to or equal to the received power of the other wavelength signals. This reduces the power flatness of multiple wavelength signals in the second network device, thereby reducing crosstalk between wavelength signals in the second network device.

[0013] In one possible implementation, the second network device acquiring the received power values ​​of at least two wavelength signals based on multi-wavelength optical signals includes: acquiring at least two wavelength signals based on the multi-wavelength optical signals, performing down-wave detection on the at least two wavelength signals, and obtaining the received power values ​​of the at least two wavelength signals. The at least two wavelength signals correspond to the same down-wave channel, and the second network device can detect the power of multiple wavelength signals through a single down-wave channel. Furthermore, the second network device can perform down-wave detection without using additional components.

[0014] In another possible implementation, the second network device performs downwave detection on at least two wavelength signals to obtain the received power values ​​of at least two wavelength signals. This includes: the second network device performs downwave detection on a first wavelength signal to obtain the received power value of the first wavelength signal; the second network device performs downwave detection on a second wavelength signal to obtain the downwave power value; and corrects the detected downwave power value according to a preset downwave channel difference to obtain the received power value of the second wavelength signal. The downwave channel difference is used to indicate the insertion loss difference of different downwave channels. The first wavelength signal and the second wavelength signal correspond to different downwave channels. Correcting the received power value of the second wavelength signal according to the downwave channel difference can reduce the power deviation caused by the insertion loss of different downwave channels.

[0015] A third aspect provides an optical signal processing method, comprising: after a network device receives multi-wavelength optical signals, determining the power value of a target lower-wave channel based on the multi-wavelength optical signals; determining a single-wavelength input power value based on the power value of the target lower-wave channel and a first preset correspondence; determining a punch-through wave power value based on the single-wavelength input power value and a second preset correspondence; determining a power difference based on the punch-through wave power value and a preset power of the upper-wave signal; determining a current difference based on the power difference and a third preset correspondence; and setting the adjustment current value of the target upper-wave signal to a target current value based on the current difference. A target photodiode is used to transmit the lower-wavelength signal in the multi-wavelength optical signals. The first preset correspondence is the correspondence between the power value of the target lower-wave channel and the single-wavelength input power value; the second preset correspondence is the correspondence between the single-wavelength input power value and the punch-through wave power value; and the third preset correspondence is the correspondence between the power difference and the current difference. When the network device receives the upper-wave signal, the target optical attenuator can adjust the power of the target upper-wave signal to the punch-through wave power value based on the target current value, thereby reducing the power flatness of the multi-wavelength signals and reducing wavelength signal crosstalk.

[0016] In one possible implementation, determining the power value of the target lower-wave channel based on the multi-wavelength optical signal includes: detecting the current of two target photodiodes based on the multi-wavelength optical signal; determining a first polarization power and a second polarization power based on the current of the two target photodiodes; and determining that the power value of the target lower-wave channel is equal to the sum of the first polarization power and the second polarization power. This provides a feasible method for obtaining the power value of the target lower-wave channel.

[0017] In another possible implementation, determining the power value of the target lower-wave channel based on the multi-wavelength optical signal includes: detecting the current of the target photodiode based on the multi-wavelength optical signal; and determining the power value of the target lower-wave channel based on the current of the target photodiode. This provides another feasible method for obtaining the power value of the target lower-wave channel, improving the flexibility of the solution implementation.

[0018] A fourth aspect provides a network device that has the function of implementing the signal processing methods described in the above aspects. This function can be implemented in hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

[0019] The fifth aspect provides a network device including a processor and a memory, the memory being used to store a program; the processor executing the program is used to implement the optical signal processing methods of the above aspects.

[0020] The sixth aspect provides a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the optical signal processing methods described above.

[0021] The seventh aspect provides a computer program product containing instructions that, when run on a computer, causes the computer to perform the optical signal processing methods described above. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of an existing optical communication system;

[0023] Figure 2 This is a schematic diagram of an optical communication system in an embodiment of this application;

[0024] Figure 3A This is a schematic diagram of a dimmable add-drop multiplexer in an embodiment of this application;

[0025] Figure 3B This is another schematic diagram of the dimmable add-drop multiplexer in the embodiments of this application;

[0026] Figure 4 This is a signaling diagram of an optical signal processing method in an embodiment of this application;

[0027] Figure 5 This is a flowchart of an optical signal processing method in an embodiment of this application;

[0028] Figure 6 This is a structural diagram of a network device in an embodiment of this application;

[0029] Figure 7 This is another structural diagram of the network device in this application embodiment;

[0030] Figure 8 This is another structural diagram of the network device in this application embodiment;

[0031] Figure 9 This is another structural diagram of the network device in this application embodiment;

[0032] Figure 10 This is a structural diagram of an in-station aggregation unit in an embodiment of this application. Detailed Implementation

[0033] The optical signal processing method of this application can be applied to optical communication systems. Optical communication systems can be, but are not limited to, single-ring, single-fiber systems.

[0034] See Figure 2In one example, the optical communication network includes: base station 21, intra-site aggregation unit (SAU) 22, intra-site aggregation unit 23, intra-site aggregation unit 24, intra-site aggregation unit 25, intra-site aggregation unit 26, intra-site aggregation unit 27, and base station 28. It should be understood that network devices for receiving and transmitting optical signals can be, but are not limited to, base stations, and network devices for transmitting optical signals can be, but are not limited to, intra-site aggregation units. The number of base stations and intra-site aggregation units in an optical communication network is not limited to the examples above.

[0035] Base station 21 includes a baseband unit (BBU) 211 and a wavelength division multiplexer (WDM) 212. The baseband unit 211 includes a colored light unit for inputting signals of different wavelengths to the WDM 212. The colored light unit can adjust the transmission power of the wavelength signals, and the adjustable power range can be, but is not limited to, 1–5 dBm. The WDM 212 is used to combine optical signals of different wavelengths into a single beam or to separate multiple optical signals of different wavelengths. The WDM 212 includes an arrayed waveguide grating.

[0036] Base station 28 includes baseband unit 281 and wavelength division multiplexer 282. Baseband unit 281 is similar to baseband unit 211, and wavelength division multiplexer 282 is similar to wavelength division multiplexer 212.

[0037] The in-station aggregation unit 22 includes a colored light unit 221, a first tunable optical add-drop multiplexer (TOADM) 222, and a second tunable optical add-drop multiplexer 223. The structures of other in-station aggregation units are similar to those of in-station aggregation unit 22.

[0038] A tunable optical add-drop multiplexer (OAD) can separate a single wavelength signal from a multi-wavelength optical signal. This separated single wavelength signal can be output via a down-wave channel or as a pass-through output. The OAD can also combine a single wavelength signal with other wavelength signals to form a multi-wavelength optical signal. The OAD may include an erbium-doped fiber amplifier (EDFA). After combining the multi-wavelength optical signals, the EDFA can amplify the power of the multi-wavelength optical signals. Alternatively, the OAD and EDFA can be independent, with the OAD connected to the EDFA. Although not shown, the in-station aggregation unit 22 also includes a service processing unit that can process down-wave or up-wave signals.

[0039] When outputting a down-wave signal, the tunable optical add-drop multiplexer can perform power detection on the down-wave signal with a detection accuracy of <0.2 dB. When receiving an up-wave signal, the variable optical attenuator in the tunable optical add-drop multiplexer can adjust the power of the up-wave signal with an adjustment accuracy of <0.1 dB.

[0040] See Figure 3A In one example, the tunable add-drop multiplexer includes photodiodes 301, 302, 303, 304, 305, 306, 307, 308, 309, 310, 311, 312, 313, 314, 315, 316, 317, and 318; multiple microring units 32; and a variable optical attenuator 331. Optical attenuator 332, variable optical attenuator 333, variable optical attenuator 334, variable optical attenuator 335, variable optical attenuator 336, polarization beam splitter rotator 341, polarization beam splitter rotator 342, polarization beam splitter rotator 343, polarization beam splitter rotator 344, polarization beam splitter rotator 345, polarization beam splitter rotator 346, polarization beam splitter rotator 347, polarization beam splitter rotator 348, channel interface 351, channel interface 352, channel interface 353, channel interface 354, channel interface 355, channel interface 356, optical signal interface 361, and optical signal interface 362. It should be understood that... Figure 3A Some components in the dimmable add-drop multiplexer shown are not shown. These unshown components are similar to those shown, and reference can be made to the shown components for details.

[0041] Among them, channel interface 351, channel interface 352 and channel interface 353 are lower wave channel interfaces, and channel interface 354, channel interface 355 and channel interface 356 are upper wave channel interfaces.

[0042] Microring unit 32 comprises one or more microrings. Microring unit 32 can separate a single wavelength signal from a multi-wavelength optical signal, and then output the separated single wavelength signal after passing through photodiode 301 and channel interface 351. The wavelength signal output from the lower wavelength channel interface is also called the lower wavelength signal. Other wavelength signals can be transmitted to the next microring unit. The process of other microrings outputting lower wavelength signals to the unit is similar to the above process. If the wavelength signal is not output from the lower wavelength channel, it is transmitted to the last microring unit; these wavelength signals are also called punch-through signals.

[0043] Wavelength signals, also known as upwave signals, can be received from channel interfaces 354, 355, or 356. A variable optical attenuator 331 can adjust the power of the upwave signal received by channel interface 354. Similarly, other variable optical attenuators can also adjust the power of the upwave signal. The final micro-ring unit combines the punch-through signal and the upwave signal, and then outputs the signal from optical signal interface 362 after passing through photodiode 317 and polarization beam splitter rotator 348.

[0044] exist Figure 3A In the tunable optical add-drop multiplexer shown, the polarization power of photodiode 301 and photodiode 302 can be detected. Then, polarization beam splitter 341 combines the polarization power of photodiode 301 and photodiode 302 into the power of the next-wave channel corresponding to channel interface 351. Similarly, polarization beam splitter 347 can combine the polarization power of photodiode 313 and photodiode 314 into the power of the input optical signal. Polarization beam splitter 348 can combine the polarization power of photodiode 317 and photodiode 318 into the power of the output optical signal.

[0045] See Figure 3B In another example, the tunable add-drop multiplexer includes photodiodes 371, 372, 373, 374, 375, 376, 377, 378, and 379; multiple microring units 32; variable optical attenuators 331, 332, 333, 334, 335, and 336; polarization beam splitters 341, 342, 343, 344, 345, 346, 347, and 348; channel interfaces 351, 352, 353, 354, 355, and 356; and optical signal interfaces 361 and 362.

[0046] exist Figure 3B In the tunable optical add-drop multiplexer shown, the power of photodiode 371 can be detected; this power corresponds to the power of the lower-wave channel at channel interface 351. Similarly, detecting the power of photodiode 374 determines the power of the upper-wave channel. The detection of other lower-wave and upper-wave channels follows the same logic. Detecting the power of photodiode 377 determines the power of the input optical signal. Detecting the power of photodiode 379 determines the power of the output optical signal. Figure 3A Compared to the dimmable add-drop multiplexer shown, Figure 3B The tunable add-drop multiplexer shown can detect power with fewer photodiodes.

[0047] It should be understood that Figure 3A or Figure 3B The tunable add-drop multiplexer shown is a schematic example. In practical applications, tunable add-drop multiplexers may include more or fewer components.

[0048] See Figure 2 During the process of base station 21 sending optical signals to base station 28, baseband unit 211 of base station 21 can send wavelength signals to wavelength division multiplexer 212. Then, the arrayed waveguide grating of wavelength division multiplexer 212 can transmit a set of wavelength signals to the first tunable optical add-drop multiplexer 222 of aggregation unit 21 in the station through dense wavelength division multiplexing (DWDM) technology. The first tunable optical add-drop multiplexer 222 selects one or more wavelength signals from a set of wavelength signals as the next wavelength signal. The first tunable optical add-drop multiplexer 222 can also receive upwave signals from the colored light unit 221. The first tunable optical add-drop multiplexer 222 combines the upwave signal and the pass-through wavelength signal into a multi-wavelength optical signal. The multi-wavelength optical signal is amplified by the EDFA and then passes through the in-station aggregation unit 22, in-station aggregation unit 23, in-station aggregation unit 24, in-station aggregation unit 25, in-station aggregation unit 26 and in-station aggregation unit 27 in sequence. The steps performed by each in-station aggregation unit are similar to those of the in-station aggregation unit 22. The last in-station aggregation unit 27 sends the multi-wavelength optical signal to the base station 28.

[0049] When a multi-wavelength signal is emitted from the baseband unit 211, a power deviation Δ1 occurs; when it passes through the arrayed waveguide grating of the wavelength division multiplexer 212, a power deviation Δ2 occurs. When the colored light unit 221 transmits the upwave signal, a power deviation Δ3 is introduced; and when it passes through the EDFA of the first tunable optical add-drop multiplexer 222, a power deviation Δ4 occurs. The correspondence between components and power deviations is shown in Table 1.

[0050] Δ1 Baseband unit Δ2 wavelength division multiplexer Δ3 Color light unit Δ4 EDFA

[0051] Table 1

[0052] The power deviation ΔP between base stations 21 and 28 is related to Δ1, Δ2, Δ3, and Δ4. As the power deviation accumulates, the likelihood of crosstalk in multi-wavelength optical signals increases, as does the probability of signal errors. To address these issues, the optical signal processing method provided in this application can reduce the power flatness of multi-wavelength signals and decrease signal transmission errors.

[0053] See Figure 4 An embodiment of the optical signal processing method provided in this application includes:

[0054] Step 401: The first network device sends multi-wavelength optical signals to the second network device.

[0055] Multi-wavelength signals are signals that use dense optical multiplexing technology to transmit multiple wavelengths of signal through a single optical fiber. The first network device and the second network device are two adjacent network nodes. In one example, the first network device is a base station, and the second network device is an intra-site aggregation unit. In another example, both the first and second network devices are intra-site aggregation units. In yet another example, the first network device is an intra-site aggregation unit, and the second network device is a base station.

[0056] It should be noted that multi-wavelength optical signals can be test signals used to correct the power flatness of multi-wavelength optical signals when there is no service. Multi-wavelength optical signals can also carry data or commands used to correct the power flatness of multi-wavelength optical signals when there is service.

[0057] Step 402: The second network device obtains the received power values ​​of at least two wavelength signals based on the multi-wavelength optical signals.

[0058] When the first network device is a base station or an in-site aggregation unit and the second network device is an in-site aggregation unit, the second network device acquires at least two wavelength signals from the multi-wavelength optical signals, performs down-wave detection on the at least two wavelength signals, and obtains the received power values ​​of the at least two wavelength signals. Down-wave detection refers to power detection of the wavelength signals output from the down-wave channel.

[0059] When the first network device is an in-site aggregation unit and the second network device is a base station, the second network device can acquire multiple wavelength signals based on the multi-wavelength signal, select at least two wavelength signals from the multiple wavelength signals, and detect the power values ​​of at least two wavelength signals as the received power value.

[0060] Step 403: The second network device sends the received power values ​​of at least two wavelength signals to the first network device.

[0061] In addition to the received power value, the second network device can also send identifiers of at least two wavelength signals to the first network device to facilitate the first network device's identification and adjustment of the wavelength signals. The received power value of the wavelength signals and / or the identifiers of the wavelength signals can be transmitted through an out-of-band channel between the second and first network devices.

[0062] Step 404: The first network device determines the average power value based on the received power values ​​of at least two wavelength signals.

[0063] Step 405: The first network device determines multiple power differences based on the received power values ​​and average power values ​​of at least two wavelength signals.

[0064] The i-th power difference is the difference between the received power value of the i-th wavelength signal and the average power value, where i is a positive integer.

[0065] Step 406: When multiple power differences include the target power difference, the first network device determines the target wavelength signal corresponding to the target power difference.

[0066] The target power difference is a power difference that is greater than or equal to a preset threshold. The preset threshold can be, but is not limited to, 0.2 dB. The number of target power differences can be one or more.

[0067] Step 407: The first network device adjusts the preset transmit power of the target wavelength signal to the target transmit power based on the target power difference.

[0068] The target transmit power is equal to the difference between the preset transmit power of the target wavelength signal and the target power difference. After adjusting the transmit power of the target wavelength signal, the first network device can transmit multi-wavelength optical signals to the second network device based on the preset transmit power of other wavelength signals and the target transmit power. For this multi-wavelength optical signal, the received power of the target wavelength signal is close to or equal to the received power of other wavelength signals.

[0069] In this embodiment, the first network device can receive the received power values ​​of at least two wavelength signals fed back by the second network device, and then determine the target wavelength signal and adjust the transmission power of the target wavelength signal based on the received power values ​​of the at least two wavelength signals to reduce the difference between the received power values ​​of the target wavelength signal and the received power values ​​of other wavelength signals. This can reduce the power flatness of multiple wavelength signals in the second network device, thereby reducing wavelength signal crosstalk.

[0070] When the first network device is a base station and the second network device is an in-site aggregation unit, the method of this embodiment can reduce power deviations Δ1 and Δ2. When the first network device is an in-site aggregation unit and the second network device is a base station or an in-site aggregation unit, the method of this embodiment can reduce power deviations Δ3 and Δ4.

[0071] It should be noted that after the second network device obtains the received power values ​​of at least two wavelength signals based on the multi-wavelength optical signals, it can determine the average power value based on the received power values ​​of at least two wavelength signals, and then determine the target power difference based on the received power values ​​of at least two wavelength signals and the average power value. Then, it sends the target power difference and the identifier of the target wavelength signal to the first network device. The first network device then adjusts the preset transmission power of the target wavelength signal to the target transmission power based on the target power difference and the identifier of the target wavelength signal.

[0072] When the second network device is an in-site aggregation unit, the second network device can obtain the received power values ​​of at least two wavelength signals in a variety of ways.

[0073] 1. Obtain the received power values ​​of at least two wavelength signals through a downwave channel.

[0074] In an optional embodiment, step 402 includes: the second network device sequentially selects one wavelength signal from the multi-wavelength optical signals for next-wave detection to obtain the received power values ​​of at least two wavelength signals.

[0075] In this embodiment, a wavelength signal is selected each time to pass through the target lower-wave channel, and then the power value of that wavelength signal is detected. This power value can be regarded as the received power value. In this way, the received power values ​​of at least two wavelength signals can be obtained according to actual needs.

[0076] 2. Obtain the received power values ​​of at least two wavelength signals through multiple downwave channels.

[0077] In another alternative embodiment, step 402 includes:

[0078] The second network device performs downwave detection on the first wavelength signal to obtain the received power value of the first wavelength signal;

[0079] The second network device performs downwave detection on the second wavelength signal, and corrects the downwave power value obtained from the downwave detection according to the preset downwave channel difference to obtain the received power value of the second wavelength signal. The first wavelength signal and the second wavelength signal correspond to different downwave channels.

[0080] In this embodiment, the lower-wave channel through which the first wavelength signal passes is called the first lower-wave channel, and the lower-wave channel through which the second wavelength signal passes is called the second lower-wave channel. The lower-wave power value is corrected based on the channel difference between the first and second lower-wave channels. The corrected result can be regarded as the power value of the second wavelength signal passing through the first lower-wave channel. This can reduce the power error caused by channel differences and ensure the accuracy of the received power value of the wavelength signal.

[0081] Before executing the optical signal processing method of this application, the lower-wave power values ​​of the second wavelength signal passing through the first lower-wave channel and the second wavelength signal passing through the second lower-wave channel are detected respectively. The difference between the two lower-wave power values ​​can be used as the channel difference. Similarly, based on the power values ​​of each wavelength signal passing through each lower-wave channel, multiple channel difference values ​​corresponding to each wavelength signal can be determined.

[0082] In an optional embodiment, step 407 includes: the first network device determining that the target transmit power is equal to the preset transmit power of the target wavelength signal minus the target power difference, and adjusting the preset transmit power of the target wavelength signal to the target transmit power.

[0083] In this embodiment, adjusting the preset transmit power of the target wavelength signal to the target transmit power makes the received power of the target wavelength signal close to or equal to the average power, and also makes the received power of the target wavelength signal closer to the power of other wavelength signals. Therefore, the power flatness of multiple wavelength signals in the second network device can be reduced. Similarly, the first network device can adjust the transmit power of each wavelength signal so that the received power of each wavelength signal equals the average power.

[0084] In another alternative embodiment, step 407 includes: the first network device determining the adjustment current value of the target wavelength signal based on the target power difference, and adjusting the preset transmission power of the target wavelength signal to the target transmission power based on the adjustment current value.

[0085] In this embodiment, after determining the adjustment current value of the target wavelength signal, the target variable optical attenuator can adjust the preset transmit power of the target wavelength signal to the target transmit power according to the adjustment current value. This makes the received power of the target wavelength signal close to or equal to the average power, and also makes the received power of the target wavelength signal closer to the power of other wavelength signals. Therefore, the power flatness of multiple wavelength signals in the second network device can be reduced. Similarly, the first network device can adjust the adjustment current value of each wavelength signal so that the received power of each wavelength signal is equal to the average power.

[0086] The above describes the case of performing down-wave detection on two wavelength signals and correcting the power value of one wavelength signal. When performing down-wave detection on multiple wavelength signals, correcting the power value according to the above method can obtain the power values ​​of multiple wavelength signals passing through a single down-wave channel, thereby reducing the power error caused by channel differences.

[0087] The above describes an optical signal processing method that adjusts the transmit power based on the received power feedback. This application also provides another optical signal processing method executed by a network device, which can adjust the transmit power of a wavelength signal according to a preset correspondence.

[0088] See Figure 5 Another embodiment of the optical signal processing method provided in this application includes:

[0089] Step 501: Receive multi-wavelength optical signals.

[0090] Network devices can receive multi-wavelength optical signals from external devices, which may be, but are not limited to, base stations or in-site aggregation units. Network devices may be, but are not limited to, in-site aggregation units.

[0091] Step 502: Determine the power value of the target lower wave channel based on the multi-wavelength optical signal.

[0092] In an optional embodiment, step 502 includes: detecting the current of two target photodiodes based on the multi-wavelength optical signal; determining a first polarization power and a second polarization power based on the current of the two target photodiodes; and determining that the power value of the target lower-wave channel is equal to the sum of the first polarization power and the second polarization power. The target lower-wave channel can be any lower-wave channel, and the two target photodiodes are associated with the target lower-wave channel. After the network device determines the wavelength signal passing through the lower-wave channel based on the multi-wavelength optical signal, the wavelength signal will sequentially pass through the target photodiodes and the lower-wave channel. The two target photodiodes are denoted as the first photodiode and the second photodiode, respectively. The power value of the target lower-wave channel and the polarization power value of the target photodiodes satisfy the following formula: Pd = Pd1e + Pd1m. Pd is the power value of the target lower-wave channel, Pd1e is the polarization power of the first photodiode, and Pd1m is the polarization power of the second photodiode.

[0093] In another optional embodiment, step 502 includes: detecting the current of the target photodiode based on the multi-wavelength optical signal; and determining the power value of the target lower-wave channel based on the current of the target photodiode. The target photodiode is a photodiode connected to the target lower-wave channel interface, which corresponds to the target lower-wave channel, so the power value of the target lower-wave channel can be determined based on the current of the target photodiode.

[0094] Step 503: Determine the single-wave input power value based on the power value of the target lower wave channel and the first preset correspondence.

[0095] The first preset correspondence is the relationship between the power value of the target lower wave channel and the single-wave input power value. In one example, when the first wavelength signal passes through the first lower wave channel, the target photodiodes associated with the first lower wave channel are the first photodiode and the second photodiode. The polarization power of the first photodiode, the polarization power of the second photodiode, and the correspondence between the power value of the target lower wave channel and the single-wave input power value are shown in Table 2.

[0096]

[0097] Table 2

[0098] Similarly, when a signal of any wavelength passes through each downstream channel, the correspondence between the power value of the target downstream channel and the single-wavelength input power value can be pre-marked. It should be understood that the number of target downstream channel power values ​​and the number of single-wavelength input power values ​​are not limited to the examples above.

[0099] Step 504: Determine the punch-through wave power value based on the single-wave input power value and the second preset correspondence.

[0100] The second preset relationship is the correspondence between the single-wavelength input power value and the punch-through wave power value. In one example, when the second to eighth wavelength signals are set as the next wave signals and the first wavelength signal is set as the punch-through wave, the correspondence between the single-wavelength input power value and the punch-through wave power value of the first wavelength signal is shown in Table 3:

[0101] Pin1 Pout1 Pin2 Pout2 Pin3 Pout3 Pin4 Pout4 Pin5 Pout5 Pin6 Pout6 Pin7 Pout7 Pin8 Pout8 Pin9 Pout9 Pin10 Pout10

[0102] Table 3

[0103] Similarly, the correspondence between the single-wavelength input power and the punch-through power value of any wavelength signal can be pre-defined when it is used as a punch-through wave. Furthermore, the slope of the punch-through power value can be obtained from at least two punch-through power values ​​for interpolation to obtain more punch-through power values. It should be understood that the number of single-wavelength input powers and the number of punch-through power values ​​are not limited to the examples above.

[0104] Furthermore, when multiple wavelength signals are used as punch-through waves, the correspondence between the input power of the multiple wavelength signals and the power of the punch-through wave can be obtained.

[0105] Step 505: Determine the power difference based on the punch-through wave power value and the preset power of the overpass signal.

[0106] The upwave signal refers to the wavelength signal that passes through the upwave channel.

[0107] Step 506: Determine the current difference based on the power difference and the third preset correspondence.

[0108] The third preset relationship is the correspondence between power difference and current difference. When the first wavelength signal passes through the first upwave channel, the current difference and power difference of the first wavelength signal are shown in Table 4:

[0109] I1 1 I2 2 I3 3 I4 4 I5 5 I6 6 I7 7 I8 8 I9 9 I10 10

[0110] Table 4

[0111] Similarly, the correspondence between the current difference and power difference when any wavelength signal passes through each upstream channel can be pre-marked. It should be understood that the number of current differences and power differences is not limited to the examples above.

[0112] Step 507: Set the adjustment current value of the target upwave signal to the target current value based on the current difference.

[0113] The third preset correspondence is the relationship between the power difference and the adjusted current value. The network device determines the current difference based on the power difference and the third preset correspondence, and determines the target current value based on the current value of the target optical attenuator and the current difference. The target current value is equal to the current value minus the current difference. The target optical attenuator is used to adjust the power of the target wavelength signal.

[0114] After the network device receives the upwave signal, the target optical attenuator can adjust the preset power of the upwave signal to the punch-through power value based on the target current value. It should be understood that the adjusted upwave signal power can have an allowable deviation from the punch-through power value.

[0115] In this embodiment, the network device can pre-configure multiple correspondences. Then, based on the current of the photodiode and multiple preset correspondences, the punch-through power can be determined. Then, based on the punch-through power and the preset upwave power, the target current value of the target optical attenuator can be determined. In this way, the adjusted target optical attenuator can adjust the upwave power to the punch-through power or make the adjusted upwave power close to the punch-through power, thereby reducing the power flatness of multiple wavelength signals and reducing the crosstalk of wavelength signals.

[0116] It should be understood that this application can adjust the transmission power of the upwave signal instead of adjusting the current of the target optical attenuator, so that the power of the upwave signal is consistent with the power of the punch-through wave.

[0117] When the downwave channel is not working or malfunctions, this application can also perform power alignment on the upwave signal. As described below, in an optional embodiment, the optical signal processing method further includes: acquiring at least two upwave powers; determining a power difference based on the average of the at least two upwave powers and a preset power of the target upwave signal; and adjusting the current value of the target optical attenuator to the target current value based on the power difference and a third preset relationship.

[0118] In this embodiment, the adjustment current value is determined based on the power difference and a third preset relationship. The target current value is determined based on the current value and the adjustment current value, and the target current value is equal to the current value minus the adjustment current value. After adjusting the current value of the target optical attenuator to the target current value, when the target upwave signal passes through the target optical attenuator, the power value output by the target optical attenuator is equal to the average power of the upwave signals. This reduces the power flatness of multiple upwave signals. Similarly, the current value of the optical attenuator corresponding to each upwave signal can be adjusted to align the output power of multiple upwave signals.

[0119] It should be noted that the method of this embodiment can be used for power alignment when the network device does not receive multi-wavelength signals from other network devices. Alternatively, the method of this embodiment can be used for power alignment when the network device detects that the difference between the power value of the second optical signal and the power value of the first optical signal is less than or equal to a preset power difference value. Both the first and second optical signals are multi-wavelength optical signals, and the second optical signal is the first optical signal received by the network device after receiving the first optical signal.

[0120] When the network device detects that the difference between the power value of the second optical signal and the power value of the first optical signal is greater than a preset power difference value, it suspends the transmission of all upwave signals. In this way, the network device transmits pass-through waves and does not transmit upwave signals.

[0121] The network device of this application can implement the optical signal processing method in the above embodiments. The network device of this application is described below; please refer to [link / reference]. Figure 6 One embodiment of the network device 600 of this application includes:

[0122] The transmitting unit 601 is used to transmit multi-wavelength optical signals to the second network device;

[0123] The receiving unit 602 is used to receive the received power values ​​of at least two wavelength signals sent by the second network device;

[0124] Processing unit 603 is used to determine an average power value based on the received power values ​​of at least two wavelength signals;

[0125] The processing unit 603 is also configured to determine multiple power differences based on the received power values ​​and the average power value of at least two wavelength signals;

[0126] The processing unit 603 is also used to determine the target wavelength signal corresponding to the target power difference when multiple power differences include the target power difference, wherein the target power difference is greater than or equal to a preset threshold.

[0127] The adjustment unit 604 is also used to adjust the preset transmission power of the target wavelength signal to the target transmission power according to the target power difference.

[0128] The network device 600 in this embodiment can achieve... Figure 4 The functions of the first network device in the illustrated embodiment are described below. The processes and beneficial effects of each unit in network device 600 can be found in [reference needed]. Figure 4 The corresponding description of the illustrated embodiment.

[0129] In one alternative embodiment, the target power difference is the maximum power difference, or the target power difference is greater than or equal to a preset threshold.

[0130] In another optional embodiment, the adjustment unit 604 is specifically used to determine that the target transmission power is equal to the preset transmission power of the target wavelength signal minus the target power difference; and to adjust the preset transmission power of the target wavelength signal to the target transmission power. The adjustment unit 604 may be, but is not limited to, a colored light unit.

[0131] In another alternative embodiment, the adjustment unit 604 is specifically configured to determine an adjustment current value based on the target power difference; and adjust the preset transmission power of the target wavelength signal to the target transmission power based on the adjustment current value. The adjustment unit 604 may be, but is not limited to, a variable optical attenuator.

[0132] In another alternative embodiment, network device 600 is a base station, and the second network device is an in-site aggregation unit.

[0133] In another alternative embodiment, network device 600 and the second network device are in-station aggregation units.

[0134] In another alternative embodiment, network device 600 is an in-site aggregation unit, and the second network device is a base station.

[0135] See Figure 7 One embodiment of the network device 700 of this application includes:

[0136] The receiving unit 701 is used to receive multi-wavelength optical signals sent by the first network device;

[0137] The power detection unit 702 is used to obtain the received power values ​​of at least two wavelength signals based on the multi-wavelength optical signal;

[0138] The transmitting unit 703 is used to transmit the received power values ​​of at least two wavelength signals to the first network device.

[0139] The network device 700 in this embodiment can achieve... Figure 4 The functions of the second network device in the illustrated embodiment. The processes and beneficial effects of each unit in network device 700 can be found in [reference needed]. Figure 4 The corresponding description of the illustrated embodiment.

[0140] In an optional embodiment, the power detection unit 702 is specifically used to acquire at least two wavelength signals based on the multi-wavelength optical signal; perform downwave detection on the at least two wavelength signals to obtain the received power values ​​of the at least two wavelength signals, wherein the at least two wavelength signals correspond to the same downwave channel.

[0141] In another optional embodiment, the power detection unit 702 is specifically used to perform downwave detection on the first wavelength signal to obtain the received power value of the first wavelength signal; perform downwave detection on the second wavelength signal; and correct the downwave power value obtained by downwave detection according to the preset downwave channel difference to obtain the received power value of the second wavelength signal, wherein the first wavelength signal and the second wavelength signal correspond to different downwave channels.

[0142] See Figure 8 One embodiment of the network device 800 of this application includes:

[0143] The receiving unit 801 is used to receive multi-wavelength optical signals;

[0144] The power detection unit 802 is used to determine the power value of the target's lower wavelength channel based on the multi-wavelength optical signal;

[0145] The processing unit 803 is further configured to determine the single-wave input power value based on the power value of the target lower wave channel and the first preset correspondence, wherein the first preset correspondence is the correspondence between the power value of the target lower wave channel and the single-wave input power value.

[0146] The processing unit 803 is also used to determine the punch-through wave power value based on the single-wave input power value and the second preset correspondence, wherein the second preset correspondence is the correspondence between the single-wave input power value and the punch-through wave power value;

[0147] The processing unit 803 is also used to determine the power difference based on the power value of the punch-through wave and the preset power of the target upwave signal;

[0148] The processing unit 803 is also used to determine the current difference based on the power difference and the third preset correspondence;

[0149] The processing unit 803 is also used to set the adjustment current value of the target upwave signal to the target current value according to the current difference, and the target current value is used to adjust the power of the target upwave signal to the punch-through wave power value.

[0150] The network device 800 in this embodiment can achieve... Figure 5 The functions of the first network device in the illustrated embodiment are described below. The processes and beneficial effects of each unit in network device 800 can be found in [reference needed]. Figure 5 The corresponding description of the illustrated embodiment.

[0151] In an optional embodiment, the power detection unit 802 is specifically configured to detect the current of two target photodiodes based on the multi-wavelength optical signal; determine the first polarization power and the second polarization power based on the current of the two target photodiodes; and determine that the power value of the target lower wave channel is equal to the sum of the first polarization power and the second polarization power.

[0152] In another alternative embodiment, the power detection unit 802 is specifically used to detect the current of the target photodiode based on the multi-wavelength optical signal; and to determine the power value of the target lower-wave channel based on the current of the target photodiode.

[0153] See Figure 9 In one example, the network device 900 of this application includes a processor 901, a wavelength division multiplexer 902, a communication interface 903, and a memory 904. The processor 901, wavelength division multiplexer 902, communication interface 903, and memory 904 are interconnected via a bus.

[0154] The processor 901 may be a signal processor, a general-purpose central processing unit (CPU), an artificial intelligence processor, a microprocessor, an application-specific integrated circuit (ASIC), a graphics processor, or one or more integrated circuits, used to execute related programs to implement the functions performed by the units in the network device of this application embodiment, or to execute the optical signal processing method of the method embodiment of this application.

[0155] The memory 904 can be a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 904 can store programs. When the program stored in the memory 904 is executed by the processor 901, the processor 901 and the communication interface 903 are used to execute the various steps of the optical signal processing method in the embodiments of this application.

[0156] The processor 901 can also be an integrated circuit chip with signal processing capabilities. In implementation, each step of the optical signal processing method of this application can be completed by the integrated logic circuitry in the hardware of the processor 901 or by instructions in software form. The steps of the method in conjunction with the embodiments of this application can be directly manifested as execution by a hardware decoding processor, or execution by a combination of hardware and software modules in the decoding processor. The software modules can be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory 904. The processor 901 reads the information in memory 904 and, in conjunction with its hardware, completes the functions required by the units included in the network device of the embodiments of this application, or executes the optical signal processing method of the method embodiments of this application.

[0157] The communication interface 903 uses transceiver devices, such as, but not limited to, transceivers, to enable communication between the network device 900 and other devices or communication networks.

[0158] The bus may include a path for transmitting information between various components of the network device 900 (e.g., processor 901, wavelength division multiplexer 902, memory 904, communication interface 903). The path may be an electrical signal path or an optical signal path. The steps performed by the base station in the above embodiments may be based on... Figure 9 The network device structure is shown.

[0159] See Figure 10 This application provides an in-station aggregation unit 1000, comprising: a processor 1001, a first dimmable add-drop multiplexer 1002, a second dimmable add-drop multiplexer 1003, a colored light unit 1004, a colored light unit 1005, a communication interface 1006, and a memory 1007. The processor 1001, the first dimmable add-drop multiplexer 1002, the second dimmable add-drop multiplexer 1003, the colored light unit 1004, the colored light unit 1005, the communication interface 1006, and the memory 1007 can be connected via a bus.

[0160] The processor 1001 may be a signal processor, a general-purpose central processing unit (CPU), an artificial intelligence processor, a microprocessor, an application-specific integrated circuit (ASIC), a graphics processor, or one or more integrated circuits, used to execute relevant programs to implement the functions performed by the units in the on-site aggregation unit of this application embodiment, or to execute the optical signal processing method of this application method embodiment. The processor 1001 may also be an integrated circuit chip with signal processing capabilities. In implementation, each step of the optical signal processing method of this application can be completed by the integrated logic circuits in the hardware of the processor 1001 or by instructions in software form.

[0161] The memory 1007 can be a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 1007 can store programs. When the program stored in the memory 1007 is executed by the processor 1001, the processor 1001 performs the various steps of the optical signal processing method in this embodiment. The first tunable optical add-drop multiplexer 1002 and the second tunable optical add-drop multiplexer 1003 are described above as tunable optical add-drop multiplexers. The colored light unit 1004 and the colored light unit 1005 are described above as colored light units.

[0162] The processor 1001 can also be an integrated circuit chip with signal processing capabilities. In implementation, each step of the optical signal processing method of this application can be completed by the integrated logic circuitry in the hardware of the processor 1001 or by instructions in software form. The steps of the method in conjunction with the embodiments of this application can be directly manifested as execution by a hardware decoding processor, or execution by a combination of hardware and software modules in the decoding processor. The software modules can be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory 1007. The processor 1001 reads the information in memory 1007 and, in conjunction with its hardware, completes the functions required by the units included in the station aggregation unit of the embodiments of this application, or executes the optical signal processing method of the method embodiments of this application.

[0163] The communication interface 1006 uses a transceiver device, such as, but not limited to, a transceiver, to enable communication between the station aggregation unit 1000 and other devices or communication networks. The bus may include a path for transmitting information between various components of the station aggregation unit 1000. This path may be an electrical signal path or an optical signal path. The steps performed by the station aggregation unit in the above embodiments can be based on... Figure 10 The station's internal aggregation unit structure is shown.

[0164] This application discloses a computer-readable storage medium storing a computer program that, when run on a computer, causes the computer to execute the optical signal processing method described in the above embodiments.

[0165] In the above embodiments, the implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, in the form of a computer program product.

[0166] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in this application are generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can store or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state disk (SSD)).

[0167] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An optical signal processing method, characterized in that, include: The first network device sends a multi-wavelength optical signal to the second network device, wherein the multi-wavelength optical signal is a signal in which multiple wavelength signals are transmitted in one optical fiber; The first network device receives the received power values ​​of at least two wavelength signals sent by the second network device; The first network device determines the average power value based on the received power values ​​of the at least two wavelength signals; The first network device determines multiple power differences based on the received power values ​​of the at least two wavelength signals and the average power value; When the plurality of power differences include a target power difference, the first network device determines the target wavelength signal corresponding to the target power difference, wherein the target power difference is greater than or equal to a preset threshold. The first network device adjusts the preset transmit power of the target wavelength signal to the target transmit power based on the target power difference.

2. The method according to claim 1, characterized in that, The first network device adjusts the preset transmit power of the target wavelength signal to the target transmit power based on the target power difference, including: The first network device determines that the target transmit power is equal to the preset transmit power of the target wavelength signal minus the target power difference; The first network device adjusts the preset transmit power of the target wavelength signal to the target transmit power.

3. The method according to claim 1, characterized in that, The first network device adjusts the preset transmit power of the target wavelength signal to the target transmit power based on the target power difference, including: The first network device determines the adjustment current value of the target wavelength signal based on the target power difference; The first network device adjusts the preset transmit power of the target wavelength signal to the target transmit power according to the adjustment current value.

4. The method according to any one of claims 1 to 3, characterized in that, The first network device is a base station, and the second network device is an in-site aggregation unit.

5. The method according to any one of claims 1 to 3, characterized in that, The first network device and the second network device are in-site aggregation units.

6. The method according to any one of claims 1 to 3, characterized in that, The first network device is an in-site aggregation unit, and the second network device is a base station.

7. An optical signal processing method, characterized in that, include: The second network device receives a multi-wavelength optical signal sent by the first network device, wherein the multi-wavelength optical signal is a signal in which multiple wavelength signals are transmitted in one optical fiber; The second network device obtains the received power values ​​of at least two wavelength signals based on the multi-wavelength optical signals; The second network device sends the received power values ​​of at least two wavelength signals to the first network device. The first network device is used to determine an average power value based on the received power values ​​of the at least two wavelength signals, and to determine multiple power differences based on the received power values ​​of the at least two wavelength signals and the average power value. When the multiple power differences include a target power difference, the first network device is further used to determine a target wavelength signal corresponding to the target power difference, and to adjust the preset transmit power of the target wavelength signal to a target transmit power based on the target power difference. The target power difference is greater than or equal to a preset threshold.

8. The method according to claim 7, characterized in that, The second network device obtains the received power values ​​of at least two wavelength signals based on the multi-wavelength optical signals, including: The second network device acquires at least two wavelength signals based on the multi-wavelength optical signals; The second network device performs downwave detection on the at least two wavelength signals to obtain the received power values ​​of the at least two wavelength signals, wherein the at least two wavelength signals correspond to the same downwave channel.

9. The method according to claim 7, characterized in that, The second network device obtains the received power values ​​of at least two wavelength signals based on the multi-wavelength optical signals, including: The second network device performs downwave detection on the first wavelength signal to obtain the received power value of the first wavelength signal; The second network device performs next-wave detection on the second wavelength signal; The second network device corrects the downwave power value obtained from downwave detection based on the preset downwave channel difference to obtain the received power value of the second wavelength signal. The first wavelength signal and the second wavelength signal correspond to different downwave channels.

10. An optical signal processing method, characterized in that, include: Receive multi-wavelength optical signals, wherein the multi-wavelength optical signals are signals in which multiple wavelength signals are transmitted in one optical fiber; The power value of the target lower-wave channel is determined based on the multi-wavelength optical signal; The single-wave input power value is determined based on the power value of the target lower-wave channel and the first preset correspondence, wherein the first preset correspondence is the correspondence between the power value of the target lower-wave channel and the single-wave input power value. The punch-through wave power value is determined based on the single-wave input power value and the second preset correspondence, where the second preset correspondence is the correspondence between the single-wave input power value and the punch-through wave power value. The power difference is determined based on the power value of the punch-through wave and the preset power of the target upwave signal; The current difference is determined based on the power difference and the third preset correspondence. The adjustment current value of the target upwave signal is set to the target current value based on the current difference. The target current value is used to adjust the power of the target upwave signal to the punch-through wave power value.

11. The method according to claim 10, characterized in that, Determining the power value of the target's lower-wave channel based on the multi-wavelength optical signal includes: The current of the two target photodiodes is detected based on the multi-wavelength optical signal; The first polarization power and the second polarization power are determined based on the current of the two target photodiodes. The power value of the target lower wave channel is determined to be equal to the sum of the first polarization power and the second polarization power.

12. The method according to claim 10, characterized in that, Determining the power value of the target's lower-wave channel based on the multi-wavelength optical signal includes: The current of the target photodiode is detected based on the multi-wavelength optical signal; The power value of the target lower wave channel is determined based on the current of the target photodiode.

13. A network device, characterized in that, The network device serves as the first network device, and the network device includes: The transmitting unit is used to transmit multi-wavelength optical signals to the second network device, wherein the multi-wavelength optical signals are signals in which multiple wavelength signals are transmitted in one optical fiber; A receiving unit is configured to receive the received power values ​​of at least two wavelength signals transmitted by the second network device; A processing unit is configured to determine an average power value based on the received power values ​​of the at least two wavelength signals; The processing unit is further configured to determine multiple power differences based on the received power values ​​of the at least two wavelength signals and the average power value; The processing unit is further configured to determine a target wavelength signal corresponding to the target power difference when the plurality of power differences include a target power difference, wherein the target power difference is greater than or equal to a preset threshold. The adjustment unit is also used to adjust the preset transmission power of the target wavelength signal to the target transmission power according to the target power difference.

14. The network device according to claim 13, characterized in that, The adjustment unit is specifically used to determine that the target transmission power is equal to the preset transmission power of the target wavelength signal minus the target power difference; and to adjust the preset transmission power of the target wavelength signal to the target transmission power.

15. The network device according to claim 13, characterized in that, The adjustment unit is specifically used to determine the adjustment current value of the target wavelength signal based on the target power difference; and to adjust the preset transmission power of the target wavelength signal to the target transmission power based on the adjustment current value.

16. The network device according to any one of claims 13 to 15, characterized in that, The first network device is a base station, and the second network device is an in-site aggregation unit.

17. The network device according to any one of claims 13 to 15, characterized in that, The first network device and the second network device are in-site aggregation units.

18. The network device according to any one of claims 13 to 15, characterized in that, The first network device is an in-site aggregation unit, and the second network device is a base station.

19. A network device, characterized in that, The network device serves as a second network device, and the network device includes: The receiving unit is used to receive multi-wavelength optical signals sent by the first network device, wherein the multi-wavelength optical signals are signals in which multiple wavelength signals are transmitted in one optical fiber; A power detection unit is used to obtain the received power values ​​of at least two wavelength signals based on the multi-wavelength optical signal; The transmitting unit is configured to transmit the received power values ​​of at least two wavelength signals to the first network device. The first network device is configured to determine an average power value based on the received power values ​​of the at least two wavelength signals, and to determine multiple power differences based on the received power values ​​of the at least two wavelength signals and the average power value. When the multiple power differences include a target power difference, the first network device is further configured to determine a target wavelength signal corresponding to the target power difference, and to adjust the preset transmit power of the target wavelength signal to a target transmit power based on the target power difference. The target power difference is greater than or equal to a preset threshold.

20. The network device according to claim 19, characterized in that, The power detection unit is specifically used to acquire at least two wavelength signals based on the multi-wavelength optical signal; perform downwave detection on the at least two wavelength signals to obtain the received power values ​​of the at least two wavelength signals, wherein the at least two wavelength signals correspond to the same downwave channel.

21. The network device according to claim 19, characterized in that, The power detection unit is specifically used to perform downwave detection on the first wavelength signal to obtain the received power value of the first wavelength signal; and to perform downwave detection on the second wavelength signal, and to correct the downwave power value obtained by downwave detection according to the preset downwave channel difference to obtain the received power value of the second wavelength signal, wherein the first wavelength signal and the second wavelength signal correspond to different downwave channels.

22. A network device, characterized in that, include: The receiving unit is used to receive multi-wavelength optical signals, wherein the multi-wavelength optical signals are signals in which multiple wavelength signals are transmitted in one optical fiber; A power detection unit is used to determine the power value of the target lower wave channel based on the multi-wavelength optical signal; The processing unit is configured to determine the single-wave input power value based on the power value of the target lower-wave channel and a first preset correspondence, wherein the first preset correspondence is the correspondence between the power value of the target lower-wave channel and the single-wave input power value. The processing unit is further configured to determine the punch-through wave power value based on the single-wave input power value and the second preset correspondence, wherein the second preset correspondence is the correspondence between the single-wave input power value and the punch-through wave power value. The processing unit is also used to determine the power difference based on the punch-through wave power value and the preset power of the target upwave signal; The processing unit is further configured to determine the current difference based on the power difference and the third preset correspondence. The processing unit is further configured to set the adjustment current value of the target upwave signal to a target current value based on the current difference, wherein the target current value is used to adjust the power of the target upwave signal to the punch-through wave power value.

23. The network device according to claim 22, characterized in that, The power detection unit is specifically used to detect the current of two target photodiodes based on the multi-wavelength optical signal; determine the first polarization power and the second polarization power based on the current of the two target photodiodes; and determine that the power value of the target lower wave channel is equal to the sum of the first polarization power and the second polarization power.

24. The network device according to claim 22, characterized in that, The power detection unit is specifically used to detect the current of the target photodiode based on the multi-wavelength optical signal; and to determine the power value of the target lower-wave channel based on the current of the target photodiode.

25. A computer-readable storage medium comprising instructions, characterized in that, When it is run on a computer, it causes the computer to perform the optical signal processing method as described in any one of claims 1 to 12.

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