C + L transmission system noise wave automatic filling method and device

Abstract

The invention discloses a C + L transmission system noise wave automatic filling method and device, and relates to the technical field of optical communication, the C + L transmission system noise wave automatic filling method comprises the following steps: if the power of an optical amplifier of a downstream station of a C + L transmission system is abnormal, optical channel monitoring OCM scanning is started, and the frequency and power information of a missing channel is acquired; and starting automatic filling of noise waves based on the frequency and power information of the missing channel. According to the invention, the stability of the service channel can be maintained in the dynamic process of the C + L transmission system.

Description

Technical Field

[0001] The present application relates to the field of optical communication technology, and in particular to a method and device for automatically filling noise waves in a C+L transmission system. Background Art

[0002] As network business traffic continues to grow, higher requirements are placed on the transmission rate and performance of the transmission network. In recent years, expanding the spectrum of optical fiber use to increase single-fiber capacity is the most effective way to solve the annual growth of network traffic. The current optical transmission system has expanded from the traditional C-wave 80 / 96-wave system to the 120-wave system. The industry continues to expand the scope of use of the C-band spectrum, achieving an increase in transmission capacity and distance.

[0003] However, with the continuous emergence of technologies such as 5G, cloud technology, and big data, especially the high-load growth of DCI traffic, higher demands have been placed on transmission capacity, and the optical spectrum needs to be further expanded to the C+L band. In particular, with the maturity of 400G long-distance transmission technology, if the 80-wave transmission capacity is required under 400G QPSK and 400G PCS-16QAM code types, the occupied channel spacing is larger (not less than 80*100GHz). On the basis of the C band, it is necessary to continue to expand the available spectrum bandwidth and utilize the optical spectrum resources of the L band to form a C+L optical system. If it is necessary to continue to maintain 80 wavelengths, such as Figure 1 It is shown that the C96+L96 band spectrum is required for the 400G PCS-16QAM code type, while the C120+L120 band spectrum is required for the 400G QPSK code type.

[0004] Quartz optical fiber has a very wide SRS (Stimulated Raman Scattering) gain spectrum, and has a wide gain peak around 13THz (100nm) below the pump light frequency. If a weak signal and a strong pump light wave are transmitted in the optical fiber at the same time, and the weak signal wavelength is placed within the Raman gain bandwidth of the pump light, the weak signal light can be amplified.

[0005] In the C+L band transmission system, the L band is just within the Raman gain spectrum of the C band, which will cause the energy of the C band signal to transfer to the L band, forming a large power difference, such as Figure 2 As shown in the figure. Compared with the pure C band, the number of waves increases and the band becomes wider, and the SRS effect will cause more obvious shortwave power degradation. Therefore, in the C+L spectrum expansion solution, using SRS control technology to suppress the SRS effect is one of the key technologies to ensure system performance.

[0006] In the C+L transmission system, for common single-mode optical fiber spans of about 60 to 100 km in length, considering the difference in optical fiber attenuation coefficient and the effect of SRS power transfer, the C-band is generally 1 to 1.5 dB larger than the L-band average power to achieve a balanced and consistent average OSNR of the two. This means that if the traditional capacity expansion mode is adopted, that is, each capacity expansion only adds the service channels required for voice calls, then each time the service expansion is carried out, a system optimization is required, that is, the configuration of the entire line system is adjusted, such as Figure 3 shown.

[0007] This is a big challenge to the stability of the entire system, because the system optimization process will have a certain impact on the wavelength of the original service. The use of noise wave filling allows the optical layer line system to maintain full-wave operation at the beginning of the service opening and continue throughout the life cycle. When the service channel needs to be expanded, a filling channel is closed in turn to a service channel with the same wavelength. In this way, the system can always remain in a relatively stable state, avoiding the impact of SRS changes on existing services caused by the increase or decrease of services. Figure 4 As shown, (the solid line in the figure is the business true wave, and the dotted line is the noise wave).

[0008] However, static noise wave filling can only make the system relatively stable. Optical transmission lines and systems are always absolutely dynamic. If the lost channels are not filled with noise waves in time, the remaining channels will still be affected. Summary of the invention

[0009] The present application provides a method and device for automatically filling noise waves in a C+L transmission system, which can enable the C+L transmission system to maintain the stability of a service channel in a dynamic process.

[0010] In a first aspect, an embodiment of the present application provides a method for automatically filling noise waves in a C+L transmission system, the method comprising the following steps:

[0011] If the power of the optical amplifier at the downstream site of the C+L transmission system is abnormal, the optical channel monitoring OCM scan is started to obtain the frequency and power information of the missing channel;

[0012] Enables automatic filling of noise waves based on the frequency and power information of the missing channels.

[0013] In combination with the first aspect, in one implementation, the power abnormality of the optical amplifier includes: an input light loss alarm or an output power mutation occurs in the optical amplifier.

[0014] In combination with the first aspect, in one implementation, if an input light loss alarm occurs in an optical amplifier at a downstream site of a C+L transmission system, an optical channel monitoring OCM scan is started to obtain frequency and power information of the missing channel, including:

[0015] When the power of the optical amplifier is close to 0, an input light loss alarm is prompted, and the optical fiber is determined to be broken; OCM scanning is started to detect the channels within the C+L full bandwidth and distinguish the channel power and center frequency;

[0016] The center frequency of the acquired channel is compared with the preset center frequency of all channels. If there is a missing channel, the frequency and power information of the missing channel is recorded.

[0017] In combination with the first aspect, in one implementation, if an output power mutation occurs in an optical amplifier at a downstream site of the C+L transmission system, an optical channel monitoring OCM scan is started to obtain frequency and power information of a missing channel, including:

[0018] When the power of the optical amplifier is detected to increase or decrease suddenly but not to be 0, it is determined that the service channel is lost;

[0019] Start OCM scanning, detect channels within the full bandwidth of C+L and identify the power and center frequency of the channels;

[0020] The center frequency of the acquired channel is compared with the preset center frequency of all channels. If there is a missing channel, the frequency and power information of the missing channel is recorded.

[0021] In combination with the first aspect, in one implementation, starting the automatic filling of the noise wave based on the frequency and power information of the missing channel includes:

[0022] Based on the frequency and power information of the missing channel, the corresponding wavelength center frequency and bandwidth are opened at the port of the multiplexer optical device, and the channel attenuation is set to match the frequency and power of the service channel before the loss.

[0023] In combination with the first aspect, in one implementation, after the automatic filling of the noise wave is started based on the frequency and power information of the missing channel, the method further includes:

[0024] Send a query confirmation command to the optical amplifier to determine whether the input light loss alarm or output power mutation of the optical amplifier has been restored to the state before the fault;

[0025] After receiving the reply, switch back to the port before the fault and perform OCM scan. If the channel power is normal, stop the noise wave filling. If the channel power is abnormal, continue the noise wave filling.

[0026] In a second aspect, an embodiment of the present application provides a C+L transmission system noise wave automatic filling device, the C+L transmission system noise wave automatic filling device comprising:

[0027] A detection module, which is used to: if the power of the optical amplifier at the downstream site of the C+L transmission system is abnormal, start the optical channel monitoring OCM scan to obtain the frequency and power information of the missing channel;

[0028] A filling module that enables automatic filling of noise waves based on the frequency and power information of missing channels.

[0029] In combination with the second aspect, in one implementation, the power abnormality of the optical amplifier includes: an input light loss alarm or an output power mutation occurs in the optical amplifier.

[0030] In combination with the second aspect, in one implementation, the detection module is used to: if an input light loss alarm occurs in an optical amplifier at a downstream site of the C+L transmission system, start an optical channel monitoring OCM scan to obtain frequency and power information of the missing channel, including:

[0031] When the power of the optical amplifier is monitored to be close to 0, an input light loss alarm is prompted, and the optical fiber is determined to be disconnected;

[0032] Start OCM scanning, detect channels within the full bandwidth of C+L and identify the power and center frequency of the channels;

[0033] The center frequency of the acquired channel is compared with the preset center frequency of all channels. If there is a missing channel, the frequency and power information of the missing channel is recorded.

[0034] In combination with the second aspect, in one implementation, the detection module is used to: if an output power mutation occurs in an optical amplifier at a downstream site of the C+L transmission system, start an optical channel monitoring OCM scan to obtain frequency and power information of the missing channel, including:

[0035] When the power of the optical amplifier is detected to increase or decrease suddenly but not to be 0, it is determined that the service channel is lost;

[0036] Start OCM scanning, detect channels within the full bandwidth of C+L and identify the power and center frequency of the channels;

[0037] The center frequency of the acquired channel is compared with the preset center frequency of all channels. If there is a missing channel, the frequency and power information of the missing channel is recorded.

[0038] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0039] In the present application, if the power of the optical amplifier at the downstream site of the C+L transmission system is abnormal, the optical channel monitoring OCM scan is started to obtain the frequency and power information of the missing channel; based on the frequency and power information of the missing channel, the automatic filling of the noise wave is started.

[0040] It is understandable that optical transmission lines and systems are always absolutely dynamic. When the optical cable is interrupted or the signal source board fails, the signal channel will be lost. Since traditional noise wave filling is mainly filled in a static manner, it does not have the function of automatic filling of noise waves for fiber breakage and wave loss. The solution in this application determines fiber breakage through the optical amplifier LOS alarm and determines service channel drop through optical amplifier power jitter, thereby triggering OCM scanning to identify lost service channels and controlling related equipment to perform noise wave filling. It is a dynamic noise wave filling technology that enables the C+L transmission system to maintain the stability of the service channel in a dynamic process. At the same time, compared with the traditional static noise wave filling method, it adds OCM intervention scanning and service channel loss resolution, so that the service channel and noise wave channel can be accurately distinguished for precise filling. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is the spectrum of C+L transmission system;

[0042] Figure 2 Schematic diagram of SRS effect of C+L transmission system;

[0043] Figure 3 This is a schematic diagram of the expansion and upgrade of the traditional C+L transmission system;

[0044] Figure 4 This is a schematic diagram of the capacity expansion and upgrade of the C+L transmission system using noise wave filling;

[0045] Figure 5 This is a flow chart of an embodiment of a method for automatically filling noise waves in a C+L transmission system of the present application;

[0046] Figure 6 This is a schematic diagram of automatic filling control triggered by optical fiber interruption in this application;

[0047] Figure 7 This is a schematic diagram of automatic filling control triggered based on power changes in this application;

[0048] Figure 8 A schematic diagram of a hardware integration function for implementing fast filling for this application;

[0049] Fig. 9 This is a structural block diagram of an embodiment of a noise wave automatic filling device for a C+L transmission system of the present application. DETAILED DESCRIPTION

[0050] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0051] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit "first", "second" and "third" to different types.

[0052] In the description of the embodiments of the present application, "exemplary", "for example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary", "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "for example" or "for example" is intended to present related concepts in a specific way.

[0053] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; the “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0054] In some processes described in the embodiments of the present application, multiple operations or steps that appear in a specific order are included, but it should be understood that these operations or steps may not be executed in the order in which they appear in the embodiments of the present application or in parallel, and the sequence number of the operation is only used to distinguish the different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed in sequence or in parallel, and these operations or steps may be combined.

[0055] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0056] In a first aspect, an embodiment of the present application provides an OTDR same-cable risk identification method.

[0057] In one embodiment, referring to Figure 5 , Figure 5 This is a flow chart of the first embodiment of the OTDR cable risk identification method of the present application. Figure 5 As shown in the figure, the OTDR cable risk identification method includes:

[0058] S1. If the power of the optical amplifier at the downstream site of the C+L transmission system is abnormal, start the optical channel monitoring OCM scan to obtain the frequency and power information of the missing channel;

[0059] S2. Start automatic filling of noise waves based on the frequency and power information of the missing channels.

[0060] It is worth noting that the 400G transmission system currently generally uses noise wave filling to keep the optical layer line system in full-wave operation at the beginning of the service opening and throughout the entire life cycle. When the service channel needs to be expanded, a filling channel is closed in turn and a service channel with the same wavelength is called. In this way, the system can always remain in a relatively stable state to avoid the impact of existing services due to the increase or decrease of services.

[0061] However, in actual application projects, the transmission link cannot be static, and the diversity of services will inevitably lead to the existence of serial communication channels. Therefore, it is crucial to ensure the stability of the system in the presence of serial communication channels. When the serial communication channel fails or the optical cable between the upstream sites of the serial communication station is interrupted, the downstream power will drop significantly and affect the service, causing damage to the entire link service.

[0062] If the collusion channel can be automatically monitored and the noise wave can be refilled at the sending end of the collusion site when passing through the collusion site, the corresponding power oscillation on the downstream line can be greatly reduced, only affecting the business between the upstream site and the collusion site, and will not affect the business sent from the collusion site to the downstream.

[0063] To this end, the present application starts with the power anomaly of the optical amplifier. Specifically, the power anomaly of the optical amplifier includes: the optical amplifier receives a signal loss LOS alarm or a sudden change in output power. The present application determines fiber breakage through the optical amplifier LOS alarm, and determines service channel drop through the optical amplifier power jitter, thereby triggering OCM scanning to identify lost service channels and control related equipment to perform noise wave filling, which enables the C+L transmission system to maintain the stability of service channels in a dynamic process.

[0064] The following is an introduction to automatic filling control based on fiber interruption triggering and automatic filling control based on power change triggering:

[0065] Automatic filling control triggered by fiber break:

[0066] The upstream and downstream sites transmit signals through optical cables. After the downstream site receives the signal from the upstream site, it needs to pass through an optical amplifier to amplify the signal. When the optical cable is disconnected, or the optical fiber in the upstream rack is disconnected, the C or L optical amplifier receiving the signal downstream will have an input light loss alarm.

[0067] At this time, if the optical amplifier at the downstream site of the C+L transmission system receives a signal loss LOS alarm, the optical channel monitoring OCM scan is started to obtain the frequency and power information of the missing channel, including:

[0068] Set up the communication path and handshake mechanism between the fiber break alarm trigger board and the detection board, and set up the communication path and handshake mechanism between the detection board and the noise wave filling board;

[0069] When the power of the optical amplifier is close to 0, the optical loss alarm is prompted and the optical fiber is judged to be broken. When the optical fiber break alarm trigger board detects the fiber break, it sends information to the detection board, starts OCM scanning, detects the channels within the C+L full bandwidth and distinguishes the power and center frequency of the channels;

[0070] The center frequency of the acquired channel is compared with the preset center frequency of all channels. If there is a missing channel, the frequency and power information of the missing channel is recorded and sent to the noise wave filling board.

[0071] Finally, based on the frequency and power information of the missing channel, the noise wave filling board is used to start the automatic filling of the noise wave, and the corresponding center frequency point, bandwidth and channel attenuation are set. It is worth noting that after the combined optical device opens the corresponding wavelength port, the attenuation set by the original signal still needs to be brought into the noise wave to achieve the stability of the overall power.

[0072] In addition, when the optical cable interruption is repaired or the service channel is restored after the OTU board is replaced, since the port is still in the noise wave filling, the restored service channel cannot be automatically scanned from the OCM. At this time, it is necessary to re-determine whether the alarm or power of the optical amplifier has been restored to the state before the fault. At this time, the noise wave filling disk sends a query confirmation command to the optical amplifier. After receiving a reply, it will switch back to the port before the fault and immediately perform OCM scanning and judgment. If the channel power is normal at this time, no action will be taken. If the channel power is abnormal, the noise wave filling will continue.

[0073] For easier understanding, see Figure 6As shown in the figure, when the optical amplifier C or L amplifier in the west receiving direction of the ROADM-B station has no input light, a LOS alarm (LOS1) will be generated. It can be determined that the upstream line fiber sent to this station or the optical fiber in the station is interrupted. If the optical line fiber is interrupted, both the C and L amplifiers will have a LOS alarm. If only the C or L amplifier has a LOS alarm, it can be determined that the fiber in the rack is interrupted or the entire upstream C or L band is faulty. At this time, the OPM / OCM port connected to the transmitter is triggered to scan the wavelength and power information. After obtaining the lost wavelength, the WSS transmitter is informed to automatically fill the noise wave.

[0074] If the fiber is disconnected in the east direction, the same as the above situation, the LOS alarm of the east optical amplifier disk is used as the trigger source to perform OCM sweep and WSS automatic filling operations.

[0075] When the LOS alarm disappears, repeat the above operation, and the corresponding single disk informs the WSS to cancel the noise wave filling and restore to the initial state.

[0076] Triggering automatic fill control based on power changes:

[0077] The triggering of power change is different from the cause of LOS alarm. The power change may be caused by the failure of an OTU disk or the failure of an upstream board or part of the equipment. It is not the interruption of the optical fiber, and the number of dropped waves is small. The optical amplifier that receives the signal from the upstream site is in the locked state and there is no alarm.

[0078] At this time, if the output power of the optical amplifier at the downstream site of the C+L transmission system changes suddenly, the optical channel monitoring OCM scan is started to obtain the frequency and power information of the missing channel. For example, when the power of the optical amplifier is monitored to increase or decrease suddenly but not to 0 (different from approaching 0 when the optical fiber is interrupted), the threshold for judging the sudden change can be reasonably set as needed, for example, it can be set to 3dB.

[0079] The specific implementation includes the following steps:

[0080] Setting up the communication path and handshake mechanism between the power change trigger board and the detection board, and setting up the communication path and handshake mechanism between the detection board and the noise wave filling board;

[0081] If the power change trigger board detects a sudden change in power, it determines that the service channel is lost, sends information to the detection board, starts OCM scanning, detects channels within the C+L full bandwidth, and distinguishes the power and center frequency of the channels;

[0082] The center frequency of the acquired channel is compared with the preset center frequency of all channels. If there is a missing channel, the frequency and power information of the missing channel is recorded and sent to the noise wave filling board.

[0083] Finally, based on the frequency and power information of the missing channel, the corresponding wavelength center frequency and bandwidth are opened at the port of the multiplexer optical device, and the channel attenuation is set to match the frequency and power of the service channel before the loss.

[0084] That is, based on the frequency and power information of the missing channel, the noise wave filling board is used to start the automatic filling of the noise wave, and the corresponding center frequency point, bandwidth and channel attenuation are set. It is worth noting that after the corresponding wavelength port is opened, the attenuation set by the original signal still needs to be brought into the noise wave to achieve the stability of the overall power.

[0085] For easier understanding, see Figure 7 As shown in the figure, when the optical amplifier C or L amplifier in the receiving direction of the ROADM-B station is in the voa locked state and no alarm is generated, if there is a sudden change in power at this time, it can be determined that there is an abnormality in the channel of the upstream line sent to this station. At this time, a certain power change threshold (such as 3dB) is used as a trigger to notify the OPM / OCM port connected to the sending end to scan the wavelength and power information. After obtaining the wavelength and power information, the channel of the dropped wave can be determined, and the WSS single disk sending end is informed to automatically fill the noise wave.

[0086] If the optical power changes in the east direction, consistent with the above situation, the power change threshold of the receiving east-direction amplifying single disk is used as the trigger source to perform OCM scanning and WSS automatic filling operations at the transmitting end.

[0087] It is worth noting that in the transmission C+L system, the separation board can realize the corresponding noise automatic filling control management capability, but when the noise automatic filling control needs to be realized ultra-fast, the separated single disk will need to send commands from the trigger board to inform the execution board during the coordination process, and there will be waiting and negotiation in the middle. Moreover, these commands may also need to be forwarded by the main control of the device, so the time required will be very long, and it is undoubtedly difficult to achieve ultra-high-speed control. At this time, these required functions can also be integrated on a card to realize fast automatic filling control. For details, please refer to Figure 8 As shown, it integrates WDM, VGA, WSS and OCM.

[0088] To summarize, if the power of the optical amplifier at the downstream site of the C+L transmission system in this application is abnormal, the optical channel monitoring OCM scan is started to obtain the frequency and power information of the missing channel; based on the frequency and power information of the missing channel, the automatic filling of the noise wave is started.

[0089] It is understandable that optical transmission lines and systems are always absolutely dynamic. When the optical cable is interrupted or the signal source board fails, the signal channel will be lost. Since traditional noise wave filling is mainly filled in a static manner, it does not have the function of automatic filling of noise waves for fiber breakage and wave loss. The solution in this application determines fiber breakage through the optical amplifier LOS alarm and determines service channel drop through optical amplifier power jitter, thereby triggering OCM scanning to identify lost service channels and controlling related equipment to perform noise wave filling. It is a dynamic noise wave filling technology that enables the C+L transmission system to maintain the stability of the service channel in a dynamic process. At the same time, compared with the traditional static noise wave filling method, it adds OCM intervention scanning and service channel loss resolution, so that the service channel and noise wave channel can be accurately distinguished for precise filling.

[0090] In a second aspect, an embodiment of the present application also provides a C+L transmission system noise wave automatic filling device.

[0091] In one embodiment, referring to Fig. 9 , Fig. 9 This is a functional module diagram of an embodiment of the C+L transmission system noise wave automatic filling device of the present application. Fig. 9 As shown, the C+L transmission system noise wave automatic filling device includes:

[0092] A detection module, which is used to: if the power of the optical amplifier at the downstream site of the C+L transmission system is abnormal, start the optical channel monitoring OCM scan to obtain the frequency and power information of the missing channel;

[0093] A filling module that enables automatic filling of noise waves based on the frequency and power information of missing channels.

[0094] Furthermore, in one embodiment, the power abnormality of the optical amplifier includes: an input light loss alarm or an output power mutation of the optical amplifier.

[0095] Further, in one embodiment, the detection module is used to: if an input light loss alarm occurs in an optical amplifier at a downstream site of the C+L transmission system, start an optical channel monitoring OCM scan to obtain frequency and power information of the missing channel, including:

[0096] When the power of the optical amplifier is monitored to be close to 0, an input light loss alarm is prompted, and the optical fiber is determined to be disconnected;

[0097] Start OCM scanning, detect channels within the full bandwidth of C+L and identify the power and center frequency of the channels;

[0098] The center frequency of the acquired channel is compared with the preset center frequency of all channels. If there is a missing channel, the frequency and power information of the missing channel is recorded.

[0099] Further, in one embodiment, the detection module is used to: if an output power mutation occurs in an optical amplifier at a downstream site of the C+L transmission system, start an optical channel monitoring OCM scan to obtain frequency and power information of the missing channel, including:

[0100] When the power of the optical amplifier is detected to increase or decrease suddenly but not to be 0, it is determined that the service channel is lost;

[0101] Start OCM scanning, detect channels within the full bandwidth of C+L and identify the power and center frequency of the channels;

[0102] The center frequency of the acquired channel is compared with the preset center frequency of all channels. If there is a missing channel, the frequency and power information of the missing channel is recorded.

[0103] Further, in one embodiment, the filling module starts automatic filling of noise waves based on the frequency and power information of the missing channels, including:

[0104] Based on the frequency and power information of the missing channel, the corresponding wavelength center frequency and bandwidth are opened at the port of the multiplexer optical device, and the channel attenuation is set to match the frequency and power of the service channel before the loss.

[0105] Further, in one embodiment, after the automatic filling of the noise wave is started based on the frequency and power information of the missing channel, the filling module is further used to:

[0106] Send a query confirmation command to the optical amplifier to determine whether the input light loss alarm or output power mutation of the optical amplifier has been restored to the state before the fault;

[0107] After receiving the reply, switch back to the port before the fault and perform OCM scan. If the channel power is normal, stop the noise wave filling. If the channel power is abnormal, continue the noise wave filling.

[0108] Among them, the functional implementation of each module in the above-mentioned C+L transmission system noise wave automatic filling device corresponds to the various steps in the above-mentioned C+L transmission system noise wave automatic filling method embodiment, and its functions and implementation processes will not be repeated here one by one.

[0109] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for automatically filling noise waves in a C+L transmission system, characterized in that: The C+L transmission system noise wave automatic filling method comprises the following steps: If the power of the optical amplifier at the downstream site of the C+L transmission system is abnormal, the optical channel monitoring OCM scan is started to obtain the frequency and power information of the missing channel; Enables automatic filling of noise waves based on the frequency and power information of the missing channels.

2. The C+L transmission system noise wave automatic filling method according to claim 1, characterized in that: The power abnormality of the optical amplifier includes: an input light loss alarm or an output power mutation occurs in the optical amplifier.

3. The C+L transmission system noise wave automatic filling method as claimed in claim 2, characterized in that: If an input light loss alarm occurs in the optical amplifier at the downstream site of the C+L transmission system, the optical channel monitoring OCM scan is started to obtain the frequency and power information of the missing channel, including: When the power of the optical amplifier is close to 0, an input light loss alarm is prompted, and the optical fiber is determined to be broken; OCM scanning is started to detect the channels within the C+L full bandwidth and distinguish the channel power and center frequency; The center frequency of the acquired channel is compared with the preset center frequency of all channels. If there is a missing channel, the frequency and power information of the missing channel is recorded.

4. The C+L transmission system noise wave automatic filling method as claimed in claim 2, characterized in that: If the output power of the optical amplifier at the downstream site of the C+L transmission system suddenly changes, the optical channel monitoring OCM scan is started to obtain the frequency and power information of the missing channel, including: When the power of the optical amplifier is detected to increase or decrease suddenly but not to be 0, it is determined that the service channel is lost; Start OCM scanning, detect channels within the full bandwidth of C+L and identify the power and center frequency of the channels; The center frequency of the acquired channel is compared with the preset center frequency of all channels. If there is a missing channel, the frequency and power information of the missing channel is recorded.

5. The C+L transmission system noise wave automatic filling method according to claim 3 or 4, characterized in that: The method starts automatically filling the noise wave based on the frequency and power information of the missing channel, including: Based on the frequency and power information of the missing channel, the corresponding wavelength center frequency and bandwidth are opened at the port of the multiplexer optical device, and the channel attenuation is set to match the frequency and power of the service channel before the loss.

6. The C+L transmission system noise wave automatic filling method as claimed in claim 2, characterized in that: After the automatic filling of the noise wave is started based on the frequency and power information of the missing channel, the method further includes: Send a query confirmation command to the optical amplifier to determine whether the input light loss alarm or output power mutation of the optical amplifier has been restored to the state before the fault; After receiving the reply, switch back to the port before the fault and perform OCM scan. If the channel power is normal, stop the noise wave filling. If the channel power is abnormal, continue the noise wave filling.

7. A C+L transmission system noise wave automatic filling device, characterized in that: The C+L transmission system noise wave automatic filling device comprises: A detection module, which is used to: if the power of the optical amplifier at the downstream site of the C+L transmission system is abnormal, start the optical channel monitoring OCM scan to obtain the frequency and power information of the missing channel; A filling module that enables automatic filling of noise waves based on the frequency and power information of missing channels.

8. The C+L transmission system noise wave automatic filling device as claimed in claim 7, characterized in that: The power abnormality of the optical amplifier includes: an input light loss alarm or an output power mutation occurs in the optical amplifier.

9. The C+L transmission system noise wave automatic filling device as claimed in claim 8, characterized in that: The detection module is used to: if an input light loss alarm occurs in an optical amplifier at a downstream site of the C+L transmission system, start an optical channel monitoring OCM scan to obtain frequency and power information of the missing channel, including: When the power of the optical amplifier is monitored to be close to 0, an input light loss alarm is prompted, and the optical fiber is determined to be disconnected; Start OCM scanning, detect channels within the full bandwidth of C+L and identify the power and center frequency of the channels; The center frequency of the acquired channel is compared with the preset center frequency of all channels. If there is a missing channel, the frequency and power information of the missing channel is recorded.

10. The C+L transmission system noise wave automatic filling device according to claim 8, characterized in that: The detection module is used to: if the output power of the optical amplifier at the downstream site of the C+L transmission system changes suddenly, start the optical channel monitoring OCM scan to obtain the frequency and power information of the missing channel, including: When the power of the optical amplifier is detected to increase or decrease suddenly but not to be 0, it is determined that the service channel is lost; Start OCM scanning, detect channels within the full bandwidth of C+L and identify the power and center frequency of the channels; The center frequency of the acquired channel is compared with the preset center frequency of all channels. If there is a missing channel, the frequency and power information of the missing channel is recorded.

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