Mwdm semi- passive loss test system, method, calibration method, device and medium

Abstract

The application provides a MWDM semi-active-based loss test system, method, calibration method, device and medium, wherein the system comprises a first test unit and / or a second test unit, and the first test unit and the second test unit are used for respectively performing loss test on a measured MWDM device; the first test unit comprises a first light emitting unit and a first light power detection unit; the output end of the first light emitting unit is connected with the input end of the measured MWDM device, and the output end of the measured MWDM device is connected with the input end of the first light power detection unit; the second test unit comprises a second light emitting unit, an optical multiplexing unit, an optical routing unit and a second light power detection unit; the output end of the second light emitting unit is connected with the input end of the optical multiplexing unit, the output end of the optical multiplexing unit is connected with the input end of the measured MWDM device, the output end of the measured MWDM device is connected with the input end of the optical routing unit, and the output end of the optical routing unit is connected with the input end of the second light power detection unit.

Description

Technical Field

[0001] This application relates to the field of information technology, and in particular to a semi-active loss testing system, method, calibration method, equipment and medium based on MWDM. Background Technology

[0002] 5G fronthaul transport solutions are mainly divided into fiber direct drive solutions and wavelength division multiplexing (WDM) equipment transport solutions.

[0003] It's understandable that if a traditional direct fiber optic connection is used for 5G fronthaul, it often requires not only a large number of fiber cores but also the replacement of optical modules. This makes the cost of a direct fiber optic fronthaul significantly higher than a passive wavelength division multiplexing (WDM) solution. Furthermore, the direct fiber optic connection is frequently limited by fiber core resources. Therefore, passive WDM has found wider application in 5G fronthaul. However, passive WDM lacks protection mechanisms in case of link failure. To address the management and protection issues of fiber optic links, a semi-active WDM fronthaul solution has emerged.

[0004] The semi-active wavelength division multiplexing (WDM) fronthaul solution includes a MWDM-based semi-active WDM fronthaul solution, corresponding to a MWDM-based semi-active system. This MWDM-based semi-active system needs to be connected in series with the line and primarily integrates optical power detection functionality. Under this function, the MWDM-based semi-active system can specifically monitor optical power changes in two directions. This function has two key aspects: firstly, it has strict requirements on the loss of the semi-active equipment in the line; secondly, it has strict requirements on the monitoring performance of the semi-active equipment in the line, requiring precise monitoring. Therefore, it is essential to strictly control the differential loss and optical accuracy of the semi-active series products.

[0005] The inventors have found that, in the relevant technologies, power loss testing for MWDM semi-active series products is done manually, which results in low testing efficiency and accuracy. Summary of the Invention

[0006] One objective of this application is to provide a power loss testing system, method, calibration method, equipment, and medium based on MWDM semi-active power loss, at least to solve the technical problem of low power loss testing efficiency and accuracy for MWDM semi-active power loss products in related technologies.

[0007] To achieve the above objectives, some embodiments of this application provide a loss testing system based on MWDM semi-active loss testing. The system includes a first testing unit and / or a second testing unit, wherein the first testing unit and the second testing unit are used to perform loss testing on the MWDM device under test, respectively.

[0008] The first test unit includes a first optical emission unit and a first optical power detection unit; the output terminal of the first optical emission unit is connected to the input terminal of the MWDM device under test, and the output terminal of the MWDM device under test is connected to the input terminal of the first optical power detection unit.

[0009] The second test unit includes a second optical emission unit, an optical multiplexing unit, an optical routing unit, and a second optical power detection unit; the output terminal of the second optical emission unit is connected to the input terminal of the optical multiplexing unit, the output terminal of the optical multiplexing unit is connected to the input terminal of the MWDM device under test, the output terminal of the MWDM device under test is connected to the input terminal of the optical routing unit, and the output terminal of the optical routing unit is connected to the input terminal of the second optical power detection unit.

[0010] Some embodiments of this application also provide a semi-active loss testing method based on MWDM, applied to the system described in any of the above claims, the method comprising:

[0011] When the MWDM device under test is tested in the first test unit, the first optical emitting unit emits a light wave with a first emission power corresponding to the target channel; the first detection power measured by the first optical power detection unit is obtained; and the power loss of the MWDM device under test in the first direction based on the target channel is determined according to the first emission power and the first detection power.

[0012] When the MWDM device under test is tested in the second test unit, the second optical emitting unit emits a light wave with a second transmit power corresponding to the target channel. After the optical multiplexing unit combines the received light waves, the optical routing unit performs routing to connect the channel corresponding to the target channel to the second optical power detection unit. The second detection power measured by the second optical power detection unit, the first power loss of the optical multiplexing unit, and the second power loss of the optical routing unit are obtained. Based on the second transmit power, the second detection power, the first power loss, and the second power loss, the power loss of the MWDM device under test in the second direction based on the target channel is determined.

[0013] Some embodiments of this application also provide a semi-active loss calibration method based on MWDM, applied to the system described in any of the above claims, the method comprising:

[0014] When the MWDM device under test is tested in the first test unit, the first sampled value of the MWDM device under test in the target channel is acquired; the first optical power value of the first optical power detection unit is acquired; wherein, the first optical power value is the value obtained after removing the influence of the power loss of the MWDM device under test; the first parameter value of the MWDM device under test is determined by combining the linear regression algorithm, the first sampled value and the first optical power value; and the power loss of the MWDM device under test in the first direction based on the target channel is calibrated according to the first parameter value.

[0015] When the MWDM device under test is tested in the second test unit, a second sampled value of the MWDM device under test in the target channel is obtained; a second optical power value of the second optical power detection unit is obtained; wherein, the second optical power value is the value obtained after removing the influence of the power loss of the optical routing unit; combining the linear regression algorithm, the second sampled value and the second optical power value, a second parameter value of the MWDM device under test is determined; and based on the second parameter value, the power loss of the MWDM device under test in the second direction based on the target channel is calibrated.

[0016] Some embodiments of this application also provide an electronic device, the device comprising: one or more processors; and a memory storing computer program instructions, which, when executed, cause the processor to perform the method described in any of the above.

[0017] Some embodiments of this application also provide a computer-readable medium having computer program instructions stored thereon, which can be executed by a processor to implement the methods described in any of the above.

[0018] Compared to existing technologies, the solution provided in this application allows for the testing of optical power loss in two directions of the MWDM device under test using the first test unit and / or the second test unit. Since the power loss of the MWDM device under test in each channel can be automatically calculated using relevant parameter values ​​of the system hardware structure, and different channels can be automatically switched until the required channel loss detection is completed, the relevant personnel only need to start the program throughout the process. No manual plugging and unplugging of relevant ports or manual calculations are required, thus avoiding calculation errors caused by human error and improving the efficiency of power loss detection. Furthermore, the system can also incorporate a linear regression algorithm to automatically calibrate the power of the MWDM device under test based on the first test unit and / or the second test unit. This process also avoids calculation errors caused by human error and improves the efficiency of power loss calibration. Attached Figure Description

[0019] Figure 1 This is an exemplary structural diagram of a first test unit provided in an embodiment of this application;

[0020] Figure 2 This is an exemplary structural diagram of a second test unit provided in an embodiment of this application;

[0021] Figure 3 A schematic diagram of an exemplary structure of another first test unit provided in an embodiment of this application;

[0022] Figure 4 An exemplary structural diagram of another second test unit provided in an embodiment of this application;

[0023] Figure 5 This is a schematic diagram illustrating a specific application example of the first test unit provided in the embodiments of this application;

[0024] Figure 6 This is a schematic diagram illustrating a specific application example of the second test unit provided in the embodiments of this application;

[0025] Figure 7 An exemplary flowchart illustrating the testing of the MWDM device under test in the first test unit, as provided in an embodiment of this application;

[0026] Figure 8 An exemplary flowchart illustrating the testing of the MWDM device under test in the second test unit, as provided in an embodiment of this application;

[0027] Figure 9 An exemplary flowchart illustrating the calibration of the MWDM device under test in the first test unit, as provided in an embodiment of this application;

[0028] Figure 10 An exemplary flowchart illustrating the calibration of the MWDM device under test in the second test unit, as provided in an embodiment of this application;

[0029] Figure 11 An exemplary schematic diagram provided in this application illustrates the calibration of the MWDM device under test in the second test unit.

[0030] Figure 12 This is an exemplary structural diagram of an electronic device provided in an embodiment of this application. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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, 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.

[0032] The following terms are used in this document.

[0033] MWDM, or Medium Wavelength Division Multiplexer.

[0034] SCU, System Control Unit.

[0035] OMU-M, or Optical Multiplex Unit, where M stands for MWDM.

[0036] OTU-M, or Optical Transmitter Unit, where M stands for MWDM.

[0037] OSU, or Optical Switch Unit.

[0038] OPMU, Optical Power Meter Unit.

[0039] PC, Personal Computer.

[0040] CWDM, or Coarse Wavelength Division Multiplexer.

[0041] Example 1

[0042] This application provides a loss testing system based on MWDM semi-active loss testing. The system includes a first testing unit and / or a second testing unit, which are used to perform loss testing on the MWDM device under test, respectively.

[0043] See Figure 1As shown, the first test unit includes a first optical emitting unit (OTU-M) and a first optical power detection unit (OPMU); the output terminal of the first optical emitting unit (OTU-M) is connected to the input terminal of the MWDM device under test, and the output terminal of the MWDM device under test is connected to the input terminal of the first optical power detection unit (OPMU).

[0044] See Figure 2 As shown, the second test unit includes a second optical emitting unit (OTU-M), an optical multiplexing unit (OMU-M), an optical routing unit (OSU), and a second optical power detection unit (OPMU). The output of the second optical emitting unit (OTU-M) is connected to the input of the optical multiplexing unit (OMU-M), the output of the optical multiplexing unit (OMU-M) is connected to the input of the MWDM device under test, the output of the MWDM device under test is connected to the input of the optical routing unit (OSU), and the output of the optical routing unit (OSU) is connected to the input of the second optical power detection unit (OPMU).

[0045] Specifically, the MWDM device under test can be a MWDM board or device under test.

[0046] In some embodiments of this application, the MWDM device under test is a MWDM device with a test wavelength in the range of 1267.5nm to 1374.5nm.

[0047] In some embodiments of this application, the MWDM device under test is a 12-wavelength system, meaning that the number of wavelengths measured by the MWDM device under test is 12. It can be expanded to 12 wavelengths by shifting 3.5nm to the left or right based on the 6-wavelength CWDM. For example, the corresponding wavelengths can be: 1267.5nm, 1274.5nm, 1287.5nm, 1294.5nm, 1307.5nm, 1314.5nm, 1327.5nm, 1334.5nm, 1347.5nm, 1354.5nm, 1367.5nm, and 1374.5nm.

[0048] In some embodiments of this application, the first optical transmitting unit (OTU-M), the MWDM device under test, and the first optical power detection unit (OPMU) are all connected by optical fibers, specifically as follows: Figure 1 The solid lines in the diagram indicate that the second optical transmitting unit (OTU-M), the optical multiplexing unit (OMU-M), the MWDM device under test, the optical routing unit (OSU), and the second optical power detection unit (OPMU) are all connected by optical fibers, specifically as follows: Figure 2 The solid line in the middle.

[0049] Furthermore, in Figure 1 and Figure 2In the example shown, the three solid lines represent multiple fiber optic connections, and the solid arrows indicate the direction of light wave transmission.

[0050] It should be noted that the first test unit and the second test unit are two parallel connection methods. For the MWDM device under test, the first test unit and the second test unit need to be tested separately. There is no restriction on the order of testing the first test unit and the second test unit. The test can be considered successful after both the first test unit and the second test unit pass the test. If abnormal loss is detected after the first test unit test, it is determined to be abnormal and the second test unit test can be skipped. Similarly, if abnormal loss is detected after the second test unit test, it is determined to be abnormal and the first test unit test can be skipped.

[0051] It is understandable that in the testing process of the MWDM device under test using related technologies, it is necessary to manually switch multiple test wavelengths and manually replace fiber optic patch cords. Incorrect selection of fiber optic patch cord ports often leads to errors in the final test data. Specifically, in the testing process of related technologies, it is usually necessary to manually select one port at a time to test one wavelength. Therefore, if multiple wavelengths of optical signals need to be tested, it is necessary to manually plug and unplug fiber optic patch cords multiple times, and the cumulative testing time for each port is relatively long. The multiple plugging and unplugging of fiber optic patch cords and the long testing time for each path make the entire measurement process time-consuming, affecting the testing efficiency. In addition, the writing of test data obtained from the existing testing process is also a manual operation, resulting in low testing efficiency and accuracy.

[0052] It is not difficult to see that, compared with the prior art, the solution provided in this application embodiment can perform optical power loss testing in two directions on the MWDM device under test through the first test unit and / or the second test unit respectively. Since the power loss of the MWDM device under test in each channel can be automatically calculated using the relevant parameter values ​​of the system hardware structure, and different channels can be automatically switched until the loss detection of the required channel is completed, the relevant personnel only need to start the program during the entire process, without the need for manual plugging and unplugging of relevant ports or manual calculations. Therefore, it not only avoids calculation errors caused by human error, but also improves the efficiency of power loss detection. Furthermore, the system can also combine a linear regression algorithm to automatically perform power calibration on the MWDM device under test based on the first test unit and / or the second test unit. This process can also avoid calculation errors caused by human error and improve the calibration efficiency of power loss.

[0053] Example 2

[0054] Example 2 is an improvement based on Example 1.

[0055] like Figure 3 As shown, the first test unit may further include a first system control unit (SCU); the first system control unit (SCU) is communicatively connected to the first optical transmitting unit (OTU-M), the MWDM device under test, and the first optical power detection unit (OPMU).

[0056] like Figure 4 As shown, the second test unit may further include a second system control unit (SCU); the second system control unit (SCU) is communicatively connected to the second optical transmitting unit (OTU-M), the optical multiplexing unit (OMU-M), the MWDM device under test, the optical routing unit (OSU), and the second optical power detection unit (OPMU), respectively.

[0057] Furthermore, in Figure 3 and Figure 4 In the example shown, the communication connection is manifested as Figure 3 and Figure 4 The dashed lines in the diagram represent Ethernet connections, and the dashed arrows represent management channels.

[0058] In some examples, the first system control unit (SCU) and the second system control unit (SCU) can be connected to a PC for communication. The PC can be the same PC or two different PCs; no specific limitation is made here.

[0059] It is not difficult to see that in the solution provided by the embodiments of this application, the first test unit and the second test unit are automatically controlled by the first system control unit SCU and the second system control unit SCU respectively, which provides a relatively flexible automatic control method.

[0060] Example 3

[0061] For ease of understanding, this application provides a specific application example of a semi-active loss testing system based on MWDM, according to Embodiment 1 and / or Embodiment 2.

[0062] For the first test unit, please refer to Figure 5As shown. In this example, the first optical emitting unit (OTU-M) includes 12 channels, with wavelengths corresponding to 1267.5nm, 1274.5nm, 1287.5nm, 1294.5nm, 1307.5nm, 1314.5nm, 1327.5nm, 1334.5nm, 1347.5nm, 1354.5nm, 1367.5nm, and 1374.5nm, respectively. The first optical emitting unit (OTU-M) can acquire and emit light waves with the emission power corresponding to the wavelengths of the 12 channels. Furthermore, after testing one channel of the MWDM device under test, it can automatically shut down the currently active channel, stopping the emission power of the current wavelength, and automatically turn on another channel to emit light waves with the emission power of the wavelength corresponding to that other channel, until the testing of each channel is completed.

[0063] Each port of the first optical transmitting unit (OTU-M) is connected to the port of the MWDM device under test corresponding to the wavelength. The COM interface of the MWDM device under test is connected to the first optical power detection unit (OPMU). The detection wavelength can be set through the first optical power detection unit (OPMU), and the optical power of the current channel can also be obtained through the first optical power detection unit (OPMU).

[0064] For the second test unit, please refer to Figure 6 As shown. In this example, the second optical emitting unit (OTU-M) includes 12 channels, with wavelengths corresponding to 1267.5nm, 1274.5nm, 1287.5nm, 1294.5nm, 1307.5nm, 1314.5nm, 1327.5nm, 1334.5nm, 1347.5nm, 1354.5nm, 1367.5nm, and 1374.5nm, respectively. The second optical emitting unit (OTU-M) can acquire and emit light waves with the emission power corresponding to the wavelengths of the 12 channels. Furthermore, after testing one channel of the MWDM device under test, it can automatically shut down the currently active channel, stopping the emission power of the current wavelength, and automatically turn on another channel to emit light waves with the emission power of the wavelength corresponding to that other channel, until the testing of each channel is completed.

[0065] Furthermore, each port of the first optical transmitting unit (OTU-M) is connected to the corresponding wavelength port of the optical multiplexing unit (OMU-M). The OMU-M includes 12 channels, with wavelengths corresponding to 1267.5nm, 1274.5nm, 1287.5nm, 1294.5nm, 1307.5nm, 1314.5nm, 1327.5nm, 1334.5nm, 1347.5nm, 1354.5nm, 1367.5nm, and 1374.5nm. The function of the OMU-M is to combine light waves of different wavelengths to the COM interface. This not only facilitates automated testing but also reduces the cost of repeatedly replacing fiber optic ribbons.

[0066] In some other examples, the first optical emitting unit OTU-M may include six channels.

[0067] It is understood that the introduction of the optical multiplexing unit (OMU-M) will introduce certain losses. Therefore, the losses of the OMU-M can be tested beforehand during the testing process. For example, the loss value of the OMU-M can be... .

[0068] The optical multiplexing unit OMU-M is connected to the MWDM device under test via a COM interface. The MWDM device under test is connected to the optical routing unit OSU. The optical routing unit OSU is connected to the first optical power detection unit OPMU via a COM interface.

[0069] The optical routing unit (OSU) includes at least 6 channels. When the OSU is working, only one channel is connected to the OSU's COM interface.

[0070] The detection wavelength can be set through the second optical power detection unit (OPMU), and the optical power of the current channel can also be obtained through the second optical power detection unit (OPMU).

[0071] It is understood that the introduction of the optical routing unit (OSU) will introduce certain losses. Therefore, the losses of the OSU can be tested beforehand during the testing process. For example, the loss value of the OSU can be set as follows: .

[0072] Example 4

[0073] In some embodiments of this application, a semi-active loss testing method based on MWDM is also provided, applicable to the system described in any one or more of the above embodiments. The method may include two stages, namely a first stage and a second stage:

[0074] In the first stage, the MWDM device under test is tested in the first test unit, which may include the following steps, such as... Figure 7 As shown:

[0075] Step S101: The first optical emitting unit emits a light wave with a first emission power corresponding to the target channel.

[0076] Step S102: Obtain the first detection power measured by the first optical power detection unit.

[0077] Step S103: Based on the first transmit power and the first detect power, determine the power loss of the MWDM device under test in the first direction based on the target channel.

[0078] The application example provided in Example 3 will be used here for illustration.

[0079] Combination Figure 5 As shown, taking the light wave with a transmission power corresponding to a wavelength of 1267.5nm emitted by the first optical emitting unit OTU-M as an example, during testing, the first system control unit SCU can automatically shut down the transmission of light waves with the corresponding transmission power at the ports corresponding to other channels. The first system control unit SCU can read the first transmission power at the port corresponding to 1267.5nm of the first optical emitting unit OTU-M. Then, the optical power value on the first optical power detection unit (OPMU) is read, i.e., the first detected power. Take the first transmission power and the first detection power The absolute value of the difference can be used to determine the power loss of the tested MWDM device based on the target channel in the first direction. Specifically, the power loss value is... , .

[0080] Subsequently, the first system control unit (SCU) can automatically control the loss test of each channel to proceed sequentially or according to a preset order: it controls the first optical emitting unit (OTU-M) to shut down the light wave emission of the currently tested channel, and emits a light wave with the corresponding wavelength and emission power of another channel. Then, it automatically adjusts the wavelength value of the first optical power detection unit (OPMU) accordingly and reads the optical power value of the OPMU, i.e., the first detected power… and so on, to obtain the power loss of each channel. Specifically, the power loss value is… , , This represents the corresponding channel.

[0081] Furthermore, the first system control unit (SCU) can automatically record the power loss of each channel and send it to a display terminal such as a PC for display.

[0082] In some embodiments of this application, the method may further include: comparing the power loss of the target channel in the first direction with a preset threshold; when the power loss of the target channel in the first direction is greater than the preset threshold, marking it and issuing an abnormal notification.

[0083] Furthermore, if the MWDM device under test shows an abnormal result in the first test unit, the second stage of testing can be skipped; otherwise, the second stage of testing is required.

[0084] In the second stage, when the MWDM device under test is tested in the second test unit, the following steps may be included: Figure 8 As shown:

[0085] In step S201, the second optical emitting unit emits a light wave with a second emission power corresponding to the target channel. After the optical multiplexing unit combines the received light waves, the optical routing unit performs routing to connect the channel corresponding to the target channel to the second optical power detection unit.

[0086] Step S202: Obtain the second detection power measured by the second optical power detection unit, the first power loss of the optical multiplexing unit, and the second power loss of the optical routing unit.

[0087] Step S203: Determine the power loss of the MWDM device under test in the second direction based on the target channel, according to the second transmit power, the second detective power, the first power loss, and the second power loss.

[0088] The application example provided in Example 3 will be used here for illustration.

[0089] Combination Figure 6 As shown, taking the light wave with a transmission power corresponding to a wavelength of 1274.5nm emitted by the second optical emitting unit OTU-M as an example, during testing, the second system control unit SCU can automatically shut down the transmission of light waves with the corresponding transmission power at the ports corresponding to other channels. The second system control unit SCU can then read the second transmission power at the port corresponding to 1274.5nm of the second optical emitting unit OTU-M. Then, the optical power value on the second optical power detection unit (OPMU) is read, which is the first detected power. In addition, the loss value of the optical multiplexing unit can be measured in advance. The loss value of the optical routing unit (OSU) is Therefore, according to the formula: The power loss of the MWDM device under test in the second direction based on the target channel is determined.

[0090] Subsequently, the second system control unit (SCU) can automatically control the loss test of each channel to proceed sequentially or according to a preset order: It controls the second optical emitting unit (OTU-M) to shut down the light wave emission of the currently tested channel, and emits a light wave with the corresponding wavelength and emission power of another channel. Then, it adjusts the optical routing unit (OSU) to the corresponding channel, automatically adjusts the wavelength value of the second optical power detection unit (OPMU), and reads the optical power value of the OPMU, i.e., the second detection power… and so on, to obtain the power loss of each channel. Specifically, the power loss value is… , , This represents the corresponding channel.

[0091] It should be noted that in some other examples, during testing, due to the different directions of the light waves and the function of the optical selection unit (OSU), the second system control unit (SCU) may not automatically shut down the ports corresponding to other channels to emit light waves with corresponding transmission power. In other words, the ports corresponding to multiple channels can simultaneously emit light waves with their respective transmission power. Only the channels of the optical selection unit (OSU) need to be adjusted, which does not affect the test results of the second test unit.

[0092] Furthermore, the second system control unit (SCU) can automatically record the power loss of each channel and send it to a display terminal such as a PC for display.

[0093] In some embodiments of this application, the method may further include: comparing the power loss of the target channel in the second direction with a preset threshold; when the power loss of the target channel in the second direction is greater than the preset threshold, marking it and issuing an abnormal notification.

[0094] Furthermore, if the MWDM device under test shows an abnormal result when tested in the second test unit, the first stage of testing can be skipped; otherwise, the first stage of testing is required.

[0095] It should be noted that there is no restriction on the order of the two phases of testing mentioned above.

[0096] Example 4

[0097] In some embodiments of this application, a loss calibration method based on MWDM semi-active loss is also provided, applicable to the system described in any one or more of the above embodiments. The method may include two stages:

[0098] In the first stage, when the MWDM device under test is tested in the first test unit, the following steps may be included: Figure 9 As shown:

[0099] Step S301: Obtain the first sampled value of the MWDM device under test on the target channel.

[0100] Step S302: Obtain the first optical power value of the first optical power detection unit; wherein, the first optical power value is the value obtained after removing the influence of the power loss of the MWDM device under test.

[0101] Step S303: Combine the linear regression algorithm, the first sampled value, and the first optical power value to determine the first parameter value of the MWDM device under test.

[0102] Step S304: Based on the first parameter value, calibrate the power loss of the MWDM device under test in the first direction based on the target channel.

[0103] The application example provided in Example 3 will be used here for illustration.

[0104] Combination Figure 5 As shown, taking the first optical emitting unit OTU-M emitting light waves with a wavelength of 1267.5nm and corresponding emission power as an example, during the test, the first system control unit SCU can automatically shut down the emission of light waves with corresponding emission power from the ports corresponding to other channels, and obtain the chip sampling value of the current channel on the MWDM device under test as the first sampling value. At the same time, the optical power value based on the wavelength of 1267.5nm on the first optical power detection unit OPMU is detected as the first optical power value. The first optical emitting unit OTU-M is adjusted to emit light waves with emission power corresponding to different wavelengths, and the first sampling value (first AD value) and the first optical power value are repeatedly recorded. See Table 1 below. A total of 8 sets of data were recorded in this example.

[0105] It is worth mentioning that in some other examples, more or fewer groups of data can be recorded. This application does not specifically limit this, and relevant personnel can determine the number of groups according to actual needs. However, those skilled in the art should know that the more groups, the higher the accuracy of the obtained parameters, but the longer the time required.

[0106]

[0107] Table 1

[0108] It is important to note that the first optical power value is the value obtained after removing the influence of the power loss of the MWDM device under test, rather than the value directly read by the first optical power detection unit (OPMU). In other words, , The power loss of the tested MWDM is denoted as .

[0109] Furthermore, combining it with the linear regression algorithm: Substituting the first sampled value and the first optical power value obtained above into the formula, the parameters can be obtained. ,parameter The value of the parameter and parameters The value is the first parameter value, and the parameter can be automatically changed. ,parameter The value is written into the MWDM device under test.

[0110] Then, based on this parameter ,parameter This enables automatic power calibration of the light wave in the first direction of the MWDM device under test.

[0111] In the second stage, when the MWDM device under test is tested in the second test unit, the following steps may be included: Figure 10 As shown:

[0112] Step S401: Obtain the second sampled value of the MWDM device under test on the target channel.

[0113] Step S402: Obtain the second optical power value of the second optical power detection unit; wherein the second optical power value is the value obtained after removing the influence of the power loss of the optical routing unit.

[0114] Step S403: Combine the linear regression algorithm, the second sampled value, and the second optical power value to determine the second parameter value of the MWDM device under test.

[0115] Step S404: Based on the second parameter value, calibrate the power loss of the MWDM device under test in the second direction based on the target channel.

[0116] The application example provided in Example 3 will be used here for illustration.

[0117] Combination Figure 6 and Figure 11As shown, taking the light wave with a wavelength of 1274.5nm emitted by the second optical emitting unit OTU-M as an example, during the test, the second system control unit SCU can automatically shut down the light waves with corresponding emission power emitted by the ports corresponding to other channels, and obtain the chip sampling value of the current channel on the MWDM device under test as the second sampling value. At the same time, the optical power value based on the wavelength of 1274.5nm on the second optical power detection unit OPMU is detected as the second optical power value. The second optical emitting unit OTU-M is adjusted to emit light waves with emission power corresponding to different wavelengths, and the second sampling value (first AD value) and the second optical power value are repeatedly recorded. See Table 2 below. A total of 8 sets of data were recorded in this example.

[0118]

[0119] Table 2

[0120] It is worth mentioning that in some other examples, more or fewer groups of data can be recorded. This application does not specifically limit this, and relevant personnel can determine the number of groups according to actual needs. However, those skilled in the art should know that the more groups, the higher the accuracy of the obtained parameters, but the longer the time required.

[0121] It is important to note that the second optical power value is the value obtained after removing the power loss effect of the optical routing unit (OSU), not the value directly read by the second optical power detection unit (OPMU). In other words, , The power loss of the optical selection unit (OSU) for each channel.

[0122] Furthermore, combining it with the linear regression algorithm: Substituting the second sampled value and the second optical power value obtained above into the formula, the parameters can be obtained. ,parameter The value of the parameter and parameters The value of is the value of the second parameter, and the parameter can be automatically changed. ,parameter The value is written into the MWDM device under test.

[0123] Then, based on this parameter ,parameter This enables automatic power calibration of the light wave in the second direction of the MWDM device under test.

[0124] It is not difficult to see that the loss calibration method based on MWDM semi-active loss provided in this application embodiment calibrates by means of linear regression, which can calibrate the detection accuracy of the MWDM device under test for optical power and improve the calibration accuracy.

[0125] Furthermore, embodiments of this application also provide an electronic device, the structure of which is as follows: Figure 12 As shown, the device includes a memory 11 for storing computer-readable instructions and a processor 12 for executing the computer-readable instructions, wherein when the computer-readable instructions are executed by the processor, the processor is triggered to execute the virtual content distribution method.

[0126] The methods and / or embodiments in this application can be implemented as computer software programs. For example, embodiments of this disclosure include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowchart. When the computer program is executed by a processing unit, it performs the functions defined in the methods of this application.

[0127] It should be noted that the computer-readable medium described in this application can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable medium can be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this application, a computer-readable medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0128] In this application, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. The computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, capable of transmitting, propagating, or transmitting a program for use by or in connection with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium may be transmitted using any suitable medium, including but not limited to: wireless, wireline, optical fiber, RF, etc., or any suitable combination thereof.

[0129] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0130] The flowcharts or block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of devices, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-specific system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0131] In another aspect, embodiments of this application also provide a computer-readable medium, which may be included in the device described in the above embodiments; or it may exist independently and not assembled into the device. The aforementioned computer-readable medium carries one or more computer-readable instructions, which may be executed by a processor to implement the steps of the methods and / or technical solutions of the various embodiments of this application.

[0132] In a typical configuration of this application, the terminal and the service network devices each include one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0133] Memory may include non-persistent storage in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0134] Computer-readable media include permanent and non-permanent, removable and non-removable media, which can store information by any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, read-only optical disc (CD-ROM), digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transfer medium that can be used to store information accessible by a computing device.

[0135] Furthermore, this application also provides a computer program stored in a computer device, which causes the computer device to execute the method for executing the control code.

[0136] It should be noted that this application can be implemented in software and / or a combination of software and hardware, for example, using an application-specific integrated circuit (ASIC), a general-purpose computer, or any other similar hardware device. In some embodiments, the software program of this application can be executed by a processor to implement the steps or functions described above. Similarly, the software program of this application (including related data structures) can be stored in a computer-readable recording medium, such as RAM memory, a magnetic or optical drive, a floppy disk, or similar devices. Furthermore, some steps or functions of this application can be implemented in hardware, for example, as circuitry that cooperates with a processor to perform the various steps or functions.

[0137] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be embraced within this application. No reference numerals in the claims should be construed as limiting the scope of the claims. Furthermore, it is clear that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or devices recited in the apparatus claims may also be implemented by a single unit or device in software or hardware. The terms "first," "second," etc., are used to indicate names and do not indicate any particular order.

Claims

1. A semi-active loss testing system based on MWDM, characterized in that, The system includes a first test unit and a second test unit, which are used to perform loss tests on the MWDM equipment under test, respectively. The first test unit includes a first optical emission unit and a first optical power detection unit; The output terminal of the first optical emitting unit is connected to the input terminal of the MWDM device under test, and the output terminal of the MWDM device under test is connected to the input terminal of the first optical power detection unit. The second test unit includes a second optical emission unit, an optical multiplexing unit, an optical routing unit, and a second optical power detection unit; The output of the second optical emitting unit is connected to the input of the optical multiplexing unit, the output of the optical multiplexing unit is connected to the input of the MWDM device under test, the output of the MWDM device under test is connected to the input of the optical routing unit, and the output of the optical routing unit is connected to the input of the second optical power detection unit. The first test unit and the second test unit are two parallel connection methods. For the MWDM device under test, the first test unit and the second test unit must be tested separately. If both the first test unit and the second test unit pass the test, the test is successful. If an abnormal loss is detected after the first test unit test, it is considered abnormal, and the second test unit test is not performed. If an abnormal loss is detected after the second test unit test, it is considered abnormal, and the first test unit test is not performed. Each port of the first optical emitting unit is connected to the corresponding wavelength port of the MWDM device under test. The common interface of the MWDM device under test is connected to the first optical power detection unit. Each port of the second optical emitting unit is connected to the corresponding wavelength port of the optical multiplexing unit. The optical multiplexing unit is used to combine light waves of different wavelengths to the common interface. The optical multiplexing unit is connected to the MWDM device under test through the common interface. The MWDM device under test is connected to the optical routing unit. The optical routing unit is connected to the first optical power detection unit through the common interface. The system is used to automatically calculate the power loss of the MWDM device under test in each channel, and automatically switch between different channels until the loss detection of the required channel is completed.

2. The system according to claim 1, characterized in that, The first optical transmitting unit, the MWDM device under test, and the first optical power detection unit are all connected by optical fiber. The second optical transmitting unit, the optical multiplexing unit, the MWDM device under test, the optical routing unit, and the second optical power detection unit are all connected by optical fibers.

3. The system according to claim 1, characterized in that, The first test unit also includes a first system control unit; The first system control unit is communicatively connected to the first optical emission unit, the MWDM device under test, and the first optical power detection unit, respectively. The second test unit also includes a second system control unit; The second system control unit is communicatively connected to the second optical emission unit, the optical multiplexing unit, the MWDM device under test, the optical routing unit, and the second optical power detection unit.

4. The system according to any one of claims 1 to 3, characterized in that, The MWDM device under test is a MWDM device with a wavelength between 1267.5nm and 1374.5nm.

5. The system according to any one of claims 1 to 3, characterized in that, The number of wavelengths measured by the MWDM device under test is 12.

6. A semi-active loss testing method based on MWDM, applied to the system as described in any one of claims 1 to 5, characterized in that, The method includes: When the MWDM device under test is tested in the first test unit, the first optical emitting unit emits a light wave with a first emission power corresponding to the target channel. Obtain the first detection power measured by the first optical power detection unit; Based on the first transmit power and the first detect power, determine the power loss of the MWDM device under test in the first direction based on the target channel; When the MWDM device under test is tested in the second test unit, the second optical emitting unit emits a light wave with a second transmit power corresponding to the target channel. After the optical multiplexing unit combines the received light waves, the optical routing unit performs routing so that the channel corresponding to the target channel is connected to the second optical power detection unit. The second detection power measured by the second optical power detection unit, the first power loss of the optical multiplexing unit, and the second power loss of the optical routing unit are obtained. The power loss of the MWDM device under test in the second direction based on the target channel is determined according to the second transmit power, the second detect power, the first power loss, and the second power loss.

7. The method according to claim 6, characterized in that, The method further includes: The power loss based on the target channel in the first direction and / or the power loss based on the target channel in the second direction are compared with a preset threshold. An abnormal notification is issued when at least one of the power loss of the target channel in the first direction and / or the power loss of the target channel in the second direction exceeds the preset threshold.

8. A semi-active loss calibration method based on MWDM, applied to the system as described in any one of claims 1 to 5, characterized in that, The method includes: When the MWDM device under test is tested in the first test unit, the first sampled value of the MWDM device under test in the target channel is obtained. Obtain the first optical power value of the first optical power detection unit; wherein, the first optical power value is the value obtained after removing the influence of the power loss of the MWDM device under test; By combining the linear regression algorithm, the first sampled value, and the first optical power value, the first parameter value of the MWDM device under test is determined; Based on the first parameter value, the power loss of the MWDM device under test in the first direction based on the target channel is calibrated. When the MWDM device under test is tested in the second test unit, the second sampled value of the MWDM device under test in the target channel is obtained; Obtain the second optical power value of the second optical power detection unit; wherein the second optical power value is the value obtained after removing the influence of the power loss of the optical routing unit; By combining the linear regression algorithm, the second sampled value, and the second optical power value, the second parameter value of the MWDM device under test is determined; Based on the second parameter value, the power loss of the MWDM device under test in the second direction is calibrated according to the target channel.

9. An electronic device, characterized in that, The device includes: One or more processors; and A memory storing computer program instructions, which, when executed, cause the processor to perform the method as described in any one of claims 6 to 8.

10. A computer-readable storage medium having stored thereon computer program instructions that can be executed by a processor to implement the method as claimed in any one of claims 6 to 8.

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