Power balancing method for optical network, optical transport network element and storage medium

Abstract

The application discloses a power equalization method of an optical network, an optical transport network element and a storage medium. The power equalization method comprises the following steps: obtaining a first target power and a first actual power of an optical signal at an upstream power equalizer, and a second target power and a second actual power at a downstream power equalizer; obtaining a power equalization gain adjustment amount of the downstream power equalizer according to the first target power, the first actual power, the second target power and the second actual power; and sending the power equalization gain adjustment amount to the downstream power equalizer to enable the downstream power equalizer to perform power adjustment. The power equalization method can simultaneously give power equalization gain adjustment amounts to multiple power equalization points on a service transmission path, and can greatly improve the efficiency of power equalization and quickly realize power convergence, compared with a traditional power equalization mode in which power is adjusted from an upstream node to a downstream node along a service transmission path.

Description

Technical Field

[0001] This invention relates to the field of communication technology, and in particular to a power equalization method for optical networks, optical transmission network elements, and storage media. Background Technology

[0002] In dense wavelength division multiplexing (DWDM) networks, optical signals carrying service information often need to pass through multiple stages of amplifiers before reaching the target node. During the transmission of optical signals along the service path, in order to overcome the unbalanced characteristics caused by amplifiers and the effects of nonlinear transfer, power equalization of the optical signals needs to be performed in the network elements along the path to ensure the transmission quality of the DWDM network.

[0003] Under current technology, the application of traditional power balancing technology needs to consider the mutual influence of optical signals caused by upstream and downstream network elements during the power balancing process. It needs to adjust from the upstream node to the downstream node according to the service transmission path. Each node needs to wait for the adjacent upstream node to complete the adjustment, so the power balancing efficiency is low. Summary of the Invention

[0004] The following is an overview of the subject matter described in detail herein. This overview is not intended to limit the scope of the claims.

[0005] This invention provides a power equalization method for optical networks, optical transport network elements, and storage media, which can eliminate the impact of upstream node cross-segment gain adjustment on the power equalization of current network elements and improve power equalization efficiency.

[0006] In a first aspect, embodiments of the present invention provide a power equalization method for an optical network, the optical network including an upstream power equalizer and a downstream power equalizer disposed on the same service transmission path, the power equalization method comprising:

[0007] Acquire the first target power and the first actual power of the optical signal at the upstream power equalizer, and the second target power and the second actual power at the downstream power equalizer;

[0008] The power equalization gain adjustment amount of the downstream power equalizer is obtained based on the first target power, the first actual power, the second target power, and the second actual power.

[0009] The power equalization gain adjustment is sent to the downstream power equalizer so that the downstream power equalizer can adjust the power.

[0010] Secondly, embodiments of the present invention provide an optical transport network element, including at least one processor and a memory for communicatively connecting to the at least one processor; the memory stores instructions executable by the at least one processor, which, when executed by the at least one processor, enable the at least one processor to perform the aforementioned power equalization method for the optical network.

[0011] Thirdly, embodiments of the present invention provide a network element, including the optical transport network element of the optical transport network mentioned in the second aspect above.

[0012] Fourthly, embodiments of the present invention provide a computer-readable storage medium storing computer-executable instructions for causing a computer to perform the power equalization method for an optical network as described in the first aspect.

[0013] The power equalization method for optical networks provided in this invention requires calculating a power equalization gain adjustment for a power equalizer when a power equalizer on a service transmission path experiences a power anomaly and power equalization is required. In this case, the power offset of the same optical signal at the upstream power equalizer is considered, ensuring that the calculated power equalization gain adjustment excludes the influence of upstream cross-segment gain adjustments. This allows for simultaneous power equalization gain adjustments for multiple power equalization points on the service transmission path. Compared to the traditional power equalization method that adjusts power equalization sequentially from upstream to downstream nodes according to the service transmission path, this invention significantly improves power equalization efficiency and enables rapid power convergence.

[0014] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description, claims and drawings. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the technical solutions of the present invention and constitute a part of the specification. They are used together with the examples of the present invention to explain the technical solutions of the present invention and do not constitute a limitation on the technical solutions of the present invention.

[0016] Figure 1 This is a flowchart of a power equalization method provided in an embodiment of the first aspect of the present invention;

[0017] Figure 2 This is a flowchart of obtaining target power in a power equalization method provided in an embodiment of the first aspect of the present invention;

[0018] Figure 3This is a flowchart of obtaining channel information in a power equalization method provided in an embodiment of the first aspect of the present invention;

[0019] Figure 4 This is a flowchart of obtaining actual power in a power equalization method provided in an embodiment of the first aspect of the present invention;

[0020] Figure 5 This is a flowchart of determining power offset in a power equalization method provided in an embodiment of the first aspect of the present invention;

[0021] Figure 6 This is a flowchart illustrating the calculation process of the power equalization gain adjustment in a power equalization method provided in an embodiment of the first aspect of the present invention;

[0022] Figure 7 This is a flowchart illustrating whether power adjustment is successful in a power equalization method provided in an embodiment of the first aspect of the present invention;

[0023] Figure 8 This is a schematic diagram of the power balancing link in Example 1 of the present invention;

[0024] Figure 9 This is a flowchart of the power equalization method of Example 1 of the present invention;

[0025] Figure 10 This is a schematic diagram of the power balancing link in Example 2 of the present invention;

[0026] Figure 11 This is a flowchart of the power equalization method in Example 2 of the present invention;

[0027] Figure 12 This is a schematic diagram of the power balancing link in Example 3 of the present invention;

[0028] Figure 13 This is a schematic diagram of the device structure of an optical transmission network element provided in the second aspect of the present invention. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0030] This invention provides a power equalization method for optical networks, optical transport network elements, and storage media. When calculating the power equalization gain adjustment for the power equalizer, the power offset of the same optical signal from the upstream power equalizer is considered. By excluding the upstream power offset, the power equalization gain adjustment can be given simultaneously for multiple power equalization points on the service transmission path, without having to adjust sequentially from upstream to downstream, thus improving power equalization efficiency.

[0031] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0032] Reference Figure 1 The first aspect of the present invention provides a power equalization method for an optical network, the optical network including an upstream power equalizer and a downstream power equalizer disposed on the same service transmission path, the power equalization method of the present invention including but not limited to steps S100, S200 and S300.

[0033] Step S100: Obtain the first target power and the first actual power of the optical signal at the upstream power equalizer, and the second target power and the second actual power at the downstream power equalizer.

[0034] In an optical network, optical signals are transmitted from the source node to the destination node based on routing information. This routing information specifies the nodes the optical signal must pass through sequentially, thus establishing upstream and downstream relationships between nodes. To achieve power equalization of the optical signal and determine the power of each channel within a node, a power equalizer is installed in each node. The power equalizer detects the power of each channel within the current node. When the power equalizer detects that the actual power of a channel in the current node deviates from a reference power value by more than a certain limit, it triggers a power adjustment for that channel. It is understandable that, to manage the power equalizers in each node, the optical network also has one or more power controllers. These power controllers connect to each power equalizer, initiating power queries and sending power adjustment values ​​to the power equalizers.

[0035] To determine whether a power shift has occurred, it is necessary to obtain the actual and reference values ​​of the optical signal at the power equalizer, which correspond to the actual power and target power in step S100, respectively. By comparing the actual power and the target power, it can be determined whether a power shift has occurred at the current power equalizer. Since this embodiment of the invention needs to exclude the influence of the upstream power equalizer on the downstream power equalizer, step S100 requires obtaining the power information of the upstream and downstream power equalizers, namely the first actual power, the first target power, the second actual power, and the second target power. These data form the basis for the calculation in step S200. The target power is calculated by the power controller. For example, the power controller sends a power query request to each power equalizer. At this time, the power equalizer returns the channel information of each of its channels, such as the channel's service wavelength, transmission bandwidth, transmission rate, modulation code, etc. The power controller can calculate the target power of the corresponding power equalizer based on the above channel information.

[0036] It's understandable that power-balancing optical networks belong to the DWDM (Digital Wavelength Division Multiplexing) network category. DWDM network elements exhibit service uplink and downlink behavior. Uplink occurs when new service data is added to the current network element, which then uses wavelength division multiplexing to multiplex the new data along with other data into an optical signal for transmission to the next port. Downlink occurs when the optical signal arrives at the node where the current network element is located, which is the destination node; the service data is then demultiplexed and sent to the terminal. Therefore, both uplink and downlink within the current network element affect the optical signal, causing power offset in the channel. To prevent this power offset from impacting subsequent transmission, power balancing is necessary. It is worth noting that not all network elements containing power equalizers only forward optical signals; some also include relay network elements that convert the wavelength of optical signals. Power equalizers are also installed in relay network elements. Since the power before and after relaying may change, it is necessary to consider the channel power before and after the relay network element. This part will be explained with examples later. In addition, in some network elements, the function of power equalizers is implemented by other devices. For example, in optical line amplifier (OLA) network elements, the power equalization process is implemented by channel power detectors and channel power actuators. Therefore, it should be understood that the power equalizer in the embodiments of this invention refers to a single device or a combination of multiple devices capable of channel power query and power equalization.

[0037] Step S200: The power equalization gain adjustment amount of the downstream power equalizer is obtained based on the first target power, the first actual power, the second target power, and the second actual power.

[0038] With the development of optical networks, the number of optical amplifiers in these networks is increasing. The number of optical amplifiers that service optical signals need to pass through from the source node to the destination node is also increasing accordingly. Since optical fibers and amplifiers are not ideal devices, factors such as fiber damage and aging, as well as nonlinear amplification caused by the amplifiers, can lead to uneven channel power. Therefore, power equalizers need to be installed in the nodes to adjust and compensate for the power of the optical signal channel, thereby ensuring signal stability in the optical network. Currently, power deviations at the upstream power equalizer affect the power at the downstream power equalizer. Therefore, when a node in the service transmission path detects an abnormal power, it needs to send a power equalization adjustment to that node's power equalizer. The power equalizer adjusts the abnormal power according to the adjustment. After adjustment, the power detected at the downstream power detection point of that power equalizer is also affected, so further downstream adjustment is required. Clearly, downstream power equalization requires the upstream power equalization to be completed, resulting in low power equalization efficiency. Moreover, the power equalization process affects the activation of new services; new service optical signals can only be routed after power equalization is completed.

[0039] To improve power equalization efficiency and enable multiple power equalizers to perform power equalization in parallel, this embodiment of the invention obtains two actual power values ​​at the upstream and downstream power equalizers in step S200. Simultaneously, based on two target power values ​​at the upstream and downstream power equalizers, the power equalization gain adjustment amount of the downstream power equalizer is calculated using the aforementioned four power data. The purpose of this calculation is to exclude the influence of the upstream's first target power and first actual power on the downstream when calculating the power equalization gain adjustment amount, thereby achieving individual adjustment of the downstream power equalizer. It should be noted that in a service transmission path, power equalization is typically not performed only on a single node experiencing a power anomaly. Therefore, if the power equalizer at the current node detects a power anomaly, performing power equalization on that node will inevitably affect the power status of the downstream power equalizer. Therefore, this embodiment of the invention aims to simultaneously send corresponding power equalization gain adjustment amounts to multiple power equalizers in the service transmission path, enabling multiple power equalizers to perform power equalization simultaneously, thereby improving the efficiency of power equalization. It is worth noting that the first power equalizer on the service transmission path is not calculated according to this step, because the first power equalizer is at the upstream end and the power equalization gain adjustment amount cannot be obtained through this step. The first power equalizer can be adjusted according to conventional or other special power equalization methods.

[0040] It is understandable that the calculation method for the power equalization gain adjustment can be adjusted according to the actual situation of the optical network. For example, a simple subtraction operation can be used to subtract the upstream power data from the downstream power data, thereby eliminating the influence of the upstream power. The calculation method for the power data can also be adjusted according to the actual situation. For example, the square root of the first target power can be subtracted from the square root of the first actual power to obtain the upstream power gain. The above calculation method is only a feasible example, and the embodiments of the present invention do not limit the calculation method for the power equalization gain adjustment.

[0041] Step S300: Send the power equalization gain adjustment amount to the downstream power equalizer so that the downstream power equalizer can adjust the power.

[0042] After calculating the power equalization gain adjustment in step S200, the power controller sends it to the downstream power equalizer, enabling the downstream power equalizer to perform power equalization on the channels experiencing power anomalies according to the power equalization gain adjustment. In some cases, the power controller sends a channel power adjustment command to the power equalizer simultaneously with the power equalization gain adjustment, using this command to instruct the power equalizer to perform power equalization based on the received power equalization gain adjustment. In other cases, the power equalizer has the function of automatically triggering power equalization based on the power equalization gain adjustment. In this case, the power controller may not send a channel power adjustment command to the power equalizer when sending the power equalization gain adjustment, and the power equalizer can automatically trigger power equalization. It is understood that different manufacturers' power equalizers may have different preset power equalization processes after receiving the power equalization gain adjustment; therefore, no restrictions are placed on the operating mode of the power equalizer here.

[0043] In some embodiments, refer to Figure 2 The first target power and the second target power are obtained in the following ways:

[0044] Step S210: Obtain the first channel information of the optical signal at the upstream power equalizer and the second channel information at the downstream power equalizer;

[0045] Step S220: Calculate the first target power based on the first channel information, and calculate the second target power based on the second channel information.

[0046] The target power and target value are calculated by the power controller using channel information measured at the power equalizer. The power controller periodically or at set intervals sends power query requests to each power equalizer in the optical network. When a power equalizer receives a power query request from the power controller, it queries the channel information of each channel via the power equalizer. This channel information includes one or more of the following: channel wavelength, span attenuation, fiber type, modulation code rate, and data rate. Based on the received channel information, the power controller calculates the target power of each channel at the power equalizer. Specifically, refer to... Figure 3 In this embodiment of the invention, the method for obtaining the first channel information and the second channel information includes the following steps:

[0047] Step S211: Send power query requests to the upstream power equalizer and the downstream power equalizer respectively;

[0048] Step S212: Receive the first channel information returned by the upstream power equalizer according to the power query request, and receive the second channel information returned by the downstream power equalizer according to the power query request.

[0049] Since the calculation methods for the first target power and the second target power are the same, the following explanation uses the first target power as an example. The power controller sends a power query request to the upstream power equalizer to query the first channel information of the upstream power equalizer (the first channel information refers to the channel information of one of the channels in the upstream power equalizer), and calculates the first target power based on the first channel information. This embodiment of the invention obtains the channel information of the power equalizer through a power query request, thereby calculating the target power, providing a data basis for calculating the power offset.

[0050] In one embodiment, reference is made to Figure 4 The first and second actual power are obtained in the following ways:

[0051] Step S230: Send the first target power to the upstream power equalizer and the second target power to the downstream power equalizer.

[0052] Step S240: Receive the first actual power returned by the upstream power equalizer and the second actual power returned by the downstream power equalizer.

[0053] In this embodiment, after responding to the power query request from the power controller, the power equalizer receives the target power returned by the power controller. The power equalizer then compares the received target power with the actual power. If the difference between the target power and the actual power exceeds a set threshold (different power equalizers may have different thresholds), the power equalizer returns the actual power to the power controller to trigger the power controller to perform adjustment calculations. In some embodiments, when the power equalizer detects that the difference between the target power and the actual power exceeds the set threshold, it not only returns the actual power to the power controller but also sends a power equalization request. The power controller then performs adjustment calculations based on the received power equalization request and the actual power. In other embodiments, if the power controller has the function of automatically triggering adjustment calculations based on the actual power returned by the power equalizer, then the power equalizer is not required to send a power equalization request simultaneously. This is because the actual power sent by the power equalizer carries an identification field. After receiving the actual power, the power controller can identify this identification field to determine which channel of which power equalizer the current actual power corresponds to, thereby performing a comparison of the target power and the actual power internally. Specifically, referring to... Figure 5 In an embodiment where the power offset is calculated internally by the power controller, the power controller performs the following steps before obtaining the power equalization gain adjustment:

[0054] Step S400: Calculate the power deviation between the second actual power and the second target power;

[0055] Step S500: Determine that the power deviation value exceeds the preset power deviation threshold value.

[0056] It is understood that in the above embodiment, the power controller needs to receive the actual power returned by all power equalizers on the service transmission path, and compare the actual power with the target power of the corresponding channel to obtain the difference between the actual power and the target power, i.e. the power deviation value. If the power deviation value exceeds the preset power offset threshold, then it is determined that power equalization needs to be performed.

[0057] In summary, through steps S210, S220, S230, and S240, the power data for calculating the power equalization gain adjustment can be obtained. In one embodiment, referring to... Figure 6 The calculation method for power equalization gain adjustment includes the following steps:

[0058] Step S250: Obtain the target power gain of the optical signal from the upstream power equalizer to the downstream power equalizer based on the first target power and the second target power;

[0059] Step S260: Obtain the actual power gain of the optical signal from the upstream power equalizer to the downstream power equalizer based on the first actual power and the second actual power.

[0060] Step S270: Obtain the power equalization gain adjustment amount based on the target power gain and the actual power gain.

[0061] With P d (n) represents the target power of the nth power equalizer, denoted by P. d (n-1) represents the target power of the (n-1)th power equalizer on the same service transmission path, denoted by P. a (n) represents the actual power of the nth power equalizer, expressed in P. a (n-1) represents the actual power of the (n-1)th power equalizer, G t (n) represents the power equalization gain adjustment amount of the nth power equalizer. Therefore, the target power gain G in step S250 can be obtained. d (n) is calculated as follows:

[0062] G d (n)=P d (n)-P d (n-1)

[0063] In step S260, the actual power gain G a (n) is calculated as follows:

[0064] G a (n)=P a (n)-P a (n-1)

[0065] In step S270, the power equalization gain adjustment amount G t (n) is calculated as follows:

[0066] G t (n)=G a (n)-G d (n)=P a (n)-P a (n-1)-(P d (n)-P d (n-1))

[0067] It is understandable that the (n-1)th and nth power equalizers mentioned above are actually the upstream and downstream power equalizers. By recursively applying the above calculation formula, the power status of all power equalizers along the service transmission path and the power equalization gain adjustment amount of each power equalizer can be obtained. This allows the power equalization gain adjustment amount to be sent in parallel to the corresponding power equalizers, enabling each power equalizer to perform power equalization independently, without needing to perform power equalization sequentially according to the upstream and downstream order. This significantly improves the efficiency of power equalization, quickly achieves power convergence, meets the time requirements for power equalization, and allows for rapid service activation and recovery. Furthermore, this invention can ensure the safe and effective implementation of channel power equalization in complex grid networks, solving the problem of not affecting the normal transmission of existing services while activating new services.

[0068] After the power controller sends the power equalization gain adjustment to the power equalizer, it needs to confirm whether each power equalizer has successfully performed the power equalization. Therefore, refer to... Figure 7 After performing step S300, this embodiment of the invention further includes the following steps:

[0069] Step S410: Initiate a power query request;

[0070] Step S420: Obtain the actual power of the downstream power equalizer after adjustment based on the power equalization gain adjustment amount;

[0071] Step S430: Update the second actual power based on the adjusted actual power.

[0072] The power controller confirms the current actual power of each power equalizer after power equalization by re-initiating a power query request, updates the original actual power with the newly obtained actual power, and re-compares the difference between the updated actual power and the target power to see if it exceeds the preset power offset threshold. If it does, then the power equalization is re-executed according to the above power equalization method.

[0073] The power equalization method described in the above embodiments, when detecting a power anomaly, obtains the actual power of each power equalizer on the service transmission path and the calculated target power, and adjusts the power equalization gain G accordingly. t The calculation method of (n) is used to obtain the power equalization gain adjustment of each power equalizer except the first power equalizer, and the power equalization gain adjustment is sent to the corresponding power equalizer, so that each power equalizer on the service transmission path can perform power equalization in parallel. Compared with the traditional method of performing power equalization sequentially from upstream to downstream, the embodiment of this application can greatly speed up the power equalization efficiency and achieve rapid power convergence.

[0074] The embodiments of the present invention are illustrated below with several practical examples:

[0075] Example 1

[0076] Reference Figure 8 , Figure 8 The diagram illustrates the connection relationship between power equalizers and power controllers along the same service transmission path in an optical network. Each power equalizer is located within a ROADM (Reconfigurable Optical Add-Drop Multiplexer) network element; that is, the power equalizer is embedded within the ROADM network element. The power controller connects to each power equalizer and executes the following power equalization method, as shown in the reference diagram. Figure 9 :

[0077] Step S501: Send power query requests to the power equalizers on the same service transmission path respectively;

[0078] Step S502: Receive channel information returned by each power equalizer according to the power query request;

[0079] Step S503: Calculate the target power of each power equalizer based on the channel information, and send the target power to the corresponding power equalizer respectively;

[0080] Step S504: Receive the power equalization request and actual power returned by the power equalizer. The power equalization request is sent by the power equalizer after determining that the difference between the actual power and the received target power is greater than the offset threshold.

[0081] Step S505: Perform a power equalization operation and obtain the power equalization gain adjustment amount of each power equalizer based on the target power and actual power of the upstream and downstream power equalizers.

[0082] Step S506: Send the power equalization gain adjustment amount to the corresponding power equalizer so that the power equalizer can perform power equalization adjustment in parallel.

[0083] Step S507: Send a power query request to determine the actual power of each power equalizer on the current service transmission path. If the difference between the actual power after power equalization and the target power does not exceed the offset threshold, enter the monitoring state; otherwise, repeat steps S505 to S506.

[0084] The power equalization gain adjustment is calculated using the following formula:

[0085] G t (n)=G a (n)-G d (n)=P a(n)-P a (n-1)-(P d (n)-P d (n-1))

[0086] P d (n) represents the target power of the nth power equalizer, denoted by P. d (n-1) represents the target power of the (n-1)th power equalizer on the same service transmission path, denoted by P. a (n) represents the actual power of the nth power equalizer, expressed in P. a (n-1) represents the actual power of the (n-1)th power equalizer, G t (n) represents the power equalization gain adjustment of the nth power equalizer, G a (n) represents the actual power gain of the nth power equalizer, G d (n) represents the target power gain of the nth power equalizer.

[0087] The monitoring status in step S507 above can be either a power controller sending a power query request at regular intervals, or a power controller triggering a power query request based on a service request.

[0088] Through the above steps S501 to S507, the ROADM network elements on the service transmission path can perform power balancing in parallel, so that each power equalizer can perform power balancing independently, without having to perform power balancing sequentially according to the upstream and downstream order, which greatly improves the efficiency of power balancing and quickly completes power convergence.

[0089] Example 2

[0090] Reference Figure 10 , Figure 10 The connection relationship between power equalizers and power controllers on the same service transmission path in an optical network is shown in the diagram. One of the network elements where the power equalizer is located is a relay network element, and the network elements where the other power equalizers are located are ROADM network elements.

[0091] The power controller connects to each power equalizer, and the power equalization method executed in the ROADM network element is the same as the power equalization method in Example 1. The difference lies in the power equalization method executed in the trunk network element. Power equalizers are set up before and after the trunk, and the two power equalizers are adjusted according to the channel wavelength before and after the trunk, respectively. Figure 11 :

[0092] Step S601: Send power query requests to the power equalizers on the same service transmission path respectively;

[0093] Step S602: Identify the position of the relay network element in the route according to the service transmission path, and receive the channel information of the channel wavelength before the relay network element and the channel wavelength after the relay network element.

[0094] Step S603: Obtain the target power of the front and rear wavelength channels of the relay network element based on the channel information of the front channel wavelength and the rear channel wavelength of the relay network element, and send the target power to the power equalizer in the relay network element. The front and rear power equalization points of the power equalizer of the relay network element receive the corresponding target power respectively.

[0095] Step S604: Receive the power equalization request and actual power returned by the power equalizer. The power equalization request is sent by the power equalizer after determining that the difference between the actual power and the received target power is greater than the offset threshold.

[0096] Step S605: Perform a power equalization operation and obtain the power equalization gain adjustment amount of each power equalizer based on the target power and actual power of the upstream and downstream power equalizers.

[0097] Step S606: Send the power equalization gain adjustment amount to the corresponding power equalizer so that the power equalizer can perform power equalization adjustment in parallel. The power equalizer of the relay network element performs power equalization according to the power equalization gain adjustment amount of the two power equalization points before and after.

[0098] Step S607: Check the actual power of each power equalizer after power equalization to confirm whether power equalization is successful.

[0099] The calculation formula for the power equalization gain adjustment is the same as in Example 1, and will not be repeated here. The two power equalization points before and after a relay element can actually be considered as two power equalizers, and therefore power equalization is performed according to the same calculation formula.

[0100] Example 3

[0101] Reference Figure 12 , Figure 12 The connection relationship between power equalizers and power controllers on the same service transmission path in an optical network is illustrated schematically. Some power equalizers are located in OLA network elements, while others are located in ROADM network elements. The OLA network element implements the power equalizer function through a channel power detector and a channel power actuator. For ease of description later, the channel power detector and channel power actuator in the OLA network element are referred to as power equalizers. The power controller connects to each power equalizer and executes the power equalization method as described in steps S501 to S507.

[0102] A second aspect of the present invention provides an optical transport network element, including at least one processor and a memory for communicatively connecting to the at least one processor; the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform the power equalization method of the optical network described in the first aspect.

[0103] Reference Figure 13 Taking the control processor 1001 and memory 1002 in the optical transport network element 1000 as an example, which can be connected via a bus, the memory 1002, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, the memory 1002 may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory 1002 may optionally include memory remotely located relative to the control processor 1001, and these remote memories can be connected to the optical transport network element 1000 via a network. Examples of such networks include, but are not limited to, the Internet, enterprise intranets, local area networks, mobile communication networks, and combinations thereof.

[0104] Those skilled in the art will understand that Figure 13 The device structure shown does not constitute a limitation on the optical transport network element 1000, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0105] By executing the power equalization method of the first aspect in the network element, the power equalization gain adjustment can be given to multiple power equalization points on the service transmission path at the same time. Compared with the traditional power equalization method that adjusts from upstream node to downstream node one by one according to the service transmission path, the embodiments of the present invention can greatly improve the efficiency of power equalization and quickly achieve power convergence.

[0106] A third aspect of the present invention provides a computer-readable storage medium storing computer-executable instructions that are executed by one or more control processors, for example, by... Figure 13 One of the control processors 1001 executes the above-described power equalization method for the optical network in the above-described method embodiments, for example, executing the method described above. Figure 1 Method steps S100 to S300 Figure 2 Method steps S210 to S220, Figure 3 Method steps S211 to S212, Figure 4 Method steps S230 to S240 Figure 5Method steps S400 to S500 Figure 6 Method steps S250 to S270, Figure 7 Method steps S410 to S430, Figure 9 Method steps S501 to S507 and Figure 11 The method steps S601 to S607 are described in the text.

[0107] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0108] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0109] The above is a detailed description of the preferred embodiments of this application. However, this application is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this application. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A power equalization method for an optical network, the optical network comprising a power controller and multiple nodes disposed on the same service transmission path, each node being equipped with a power equalizer, the power controller connecting each of the power equalizers, wherein the power equalizers of any two nodes forming an upstream and downstream relationship are respectively the upstream power equalizer and the downstream power equalizer, the power equalization method being applied to the power controller, the power equalization method comprising: Obtain the target power and actual power of each channel of the power equalizer of the node; wherein, the target power of the upstream power equalizer is the first target power, the actual power of the upstream power equalizer is the first actual power, the target power of the downstream power equalizer is the second target power, and the actual power of the downstream power equalizer is the second actual power. The power equalization gain adjustment amount of each of the downstream power equalizers is obtained based on the first target power, the first actual power, the second target power, and the second actual power. The power equalization gain adjustment is sent to the corresponding downstream power equalizer so that the downstream power equalizer performs power adjustment in parallel. The step of obtaining the power equalization gain adjustment amount of each of the downstream power equalizers based on the first target power, the first actual power, the second target power, and the second actual power includes: The target power gain of the optical signal from the upstream power equalizer to the downstream power equalizer is obtained based on the first target power and the second target power. The actual power gain of the optical signal from the upstream power equalizer to the downstream power equalizer is obtained based on the first actual power and the second actual power. The power equalization gain adjustment amount is obtained based on the target power gain and the actual power gain.

2. The power equalization method for optical networks according to claim 1, characterized in that, The first target power and the second target power are obtained in the following manner: Acquire the first channel information of the optical signal at the upstream power equalizer and the second channel information at the downstream power equalizer; The first target power is calculated based on the first channel information, and the second target power is calculated based on the second channel information.

3. The power equalization method for optical networks according to claim 2, characterized in that, The channel information includes one or more of the following: cross-segment attenuation of the optical signal in the current network element, transmission bandwidth, transmission rate, modulation code used, and fiber type used.

4. The power equalization method for optical networks according to claim 2, characterized in that, The acquisition of the first channel information of the optical signal at the upstream power equalizer and the second channel information at the downstream power equalizer includes: Send power query requests to the upstream power equalizer and the downstream power equalizer respectively; Receive the first channel information returned by the upstream power equalizer according to the power query request, and receive the second channel information returned by the downstream power equalizer according to the power query request.

5. The power equalization method for optical networks according to claim 1 or 2, characterized in that, The first actual power and the second actual power are obtained in the following way: The first target power is sent to the upstream power equalizer, and the second target power is sent to the downstream power equalizer; Receive the first actual power returned by the upstream power equalizer and the second actual power returned by the downstream power equalizer.

6. The power equalization method for optical networks according to claim 1, characterized in that, Before obtaining the power equalization gain adjustment amount, the process also includes: Calculate the power deviation between the second actual power and the second target power; The power deviation value is determined to exceed a preset power offset threshold.

7. The power equalization method for optical networks according to claim 1, characterized in that, After sending the power equalization gain adjustment amount to the corresponding downstream power equalizer to be adjusted, the method further includes: Initiate a power query request; Obtain the actual power of the downstream power equalizer after adjustment based on the power equalization gain adjustment amount; The second actual power is updated based on the adjusted actual power.

8. A network element for an optical transmission network, characterized in that, It includes at least one processor and a memory for communicatively connecting to the at least one processor; the memory stores instructions executable by the at least one processor to enable the at least one processor to perform a power equalization method for an optical network as described in any one of claims 1 to 7.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions for causing a computer to perform the power equalization method for an optical network as described in any one of claims 1 to 7.

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