WO2022083470A1 - 光网络的功率均衡方法、光传送网网元及存储介质 - Google Patents

光网络的功率均衡方法、光传送网网元及存储介质 Download PDF

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WO2022083470A1
WO2022083470A1 PCT/CN2021/123110 CN2021123110W WO2022083470A1 WO 2022083470 A1 WO2022083470 A1 WO 2022083470A1 CN 2021123110 W CN2021123110 W CN 2021123110W WO 2022083470 A1 WO2022083470 A1 WO 2022083470A1
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Prior art keywords
power
equalizer
equalization
actual
downstream
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PCT/CN2021/123110
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English (en)
French (fr)
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张子源
赵志勇
刘建国
李西
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中兴通讯股份有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0201—Add-and-drop multiplexing
    • H04J14/0202—Arrangements therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/29—Repeaters
    • H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
    • H04B10/293—Signal power control
    • H04B10/294—Signal power control in a multiwavelength system, e.g. gain equalisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0221—Power control, e.g. to keep the total optical power constant
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0086—Network resource allocation, dimensioning or optimisation

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a power equalization method for an optical network, a network element of an optical transmission network, and a storage medium.
  • DWDM Dense Wavelength Division Multiplexing
  • the application of traditional power equalization technology needs to consider the mutual influence of optical signals in the process of power equalization of upstream and downstream network elements. It is necessary to adjust the service transmission path from the upstream node to the downstream node in turn. Each node needs to Waiting for the adjacent upstream nodes to complete the adjustment, so the power balancing efficiency is low.
  • the embodiments of the present application provide a power equalization method for an optical network, an optical transport network element and a storage medium, which can eliminate the influence of the cross-section gain adjustment of an upstream node on the power equalization of the current network element and improve the power equalization efficiency.
  • an embodiment of the present application provides a power equalization method for an optical network, where the optical network includes an upstream power equalizer and a downstream power equalizer arranged on the same service transmission path, and the power equalization method includes: obtaining 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; according to the first target power, the first actual power power, the second target power and the second actual power to obtain a power equalization gain adjustment amount of the downstream power equalizer; sending the power equalization gain adjustment amount to the downstream power equalizer to make the downstream power equalizer Power equalizer for power adjustment.
  • an embodiment of the present application provides an optical transport network element of an optical transport network, including at least one processor and a memory for communicating with the at least one processor; Instructions executed by the at least one processor, the instructions being executed by the at least one processor, so that the at least one processor can execute the aforementioned method for power balancing of an optical network.
  • an embodiment of the present application provides a network element, including the optical transport network network element of the optical transport network of the foregoing second aspect.
  • embodiments of the present application provide a computer-readable storage medium, where the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to cause a computer to execute the optical network of the first aspect. method of power balancing.
  • FIG. 1 is a flowchart of a power equalization method provided by an embodiment of the first aspect of the present application
  • FIG. 2 is a flowchart of obtaining target power in a power equalization method provided by an embodiment of the first aspect of the present application
  • FIG. 3 is a flowchart of acquiring channel information in a power equalization method provided by an embodiment of the first aspect of the present application
  • FIG. 5 is a flowchart of determining a power offset in a power equalization method provided by an embodiment of the first aspect of the present application
  • FIG. 6 is a flowchart of a calculation process of a power equalization gain adjustment amount in a power equalization method provided by an embodiment of the first aspect of the present application;
  • FIG. 7 is a flowchart of confirming whether power adjustment is successful in a power equalization method provided by an embodiment of the first aspect of the present application.
  • FIG. 8 is a schematic diagram of the connection of a power equalization link in Example 1 of the present application.
  • FIG. 9 is a flowchart of the power equalization method of Example 1 of the present application.
  • FIG. 10 is a schematic diagram of the connection of a power equalization link in Example 2 of the present application.
  • FIG. 11 is a flowchart of the power equalization method of Example 2 of the present application.
  • FIG. 12 is a schematic diagram of the connection of a power equalization link in Example 3 of the present application.
  • FIG. 13 is a schematic structural diagram of an apparatus of an optical transport network network element according to the second aspect of the embodiment of the present application.
  • the embodiments of the present application provide a power equalization method for an optical network, an optical transmission network network element, and a storage medium.
  • the same optical signal of the upstream power equalizer of the current power equalizer is considered.
  • the power equalization gain adjustment amount can be given to multiple power equalization points on the service transmission path at the same time, without the need to sequentially adjust from the upstream to the downstream, and improve the power equalization efficiency.
  • a first aspect of an embodiment of the present application provides a power equalization method for an optical network.
  • the optical network includes an upstream power equalizer and a downstream power equalizer that are arranged on the same service transmission path.
  • the power equalization method of the embodiment of the present application includes but is not limited to step S100, step S200 and step S300.
  • Step S100 acquiring 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.
  • the optical signal is transmitted from the source node to the destination node in the optical network based on the routing information.
  • the routing information gives which nodes the optical signal needs to pass through in sequence, so the relationship between the upstream and the downstream is formed between the nodes.
  • a power equalizer is set in the node, and the power of each channel in the current node is detected by the power equalizer.
  • the power equalizer detects that the actual power of a certain channel in the current node deviates from the reference power value beyond a certain limit, it triggers the power adjustment of the channel. It can be understood that, in order to realize the management of the power balancer in each node, one or a group of power controllers are also set in the optical network. Equalizer transmit power adjustment amount.
  • step S100 In order to determine whether a power offset occurs, it is necessary to obtain the actual value and reference value of the optical signal at the power equalizer, that is, corresponding to the actual power and target power in step S100, respectively. By comparing the actual power and the target power, the optical signal can be known. Whether a power offset occurs at the current power equalizer. Since the embodiment of the present application needs to exclude the influence of the upstream power equalizer on the downstream power equalizer, in step S100, it is necessary to obtain the power information of the upstream power equalizer and the downstream power equalizer, which are the first actual power and the first target power, respectively. , the second actual power and the second target power, these data are the calculation basis of step S200. The target power is calculated by the power controller.
  • the power controller sends a power query request to each power equalizer, and the power equalizer returns the channel information of each channel, such as the service wavelength, transmission bandwidth, and transmission rate of the channel. , modulation code type, etc., the power controller can calculate and obtain the target power of the corresponding power equalizer according to the above channel information.
  • the optical network that performs power equalization belongs to the DWDM network.
  • Add-on means that the current network element has new service data added.
  • the current network element multiplexes the new service data and other data into an optical signal through wavelength division multiplexing into an optical signal to the next one.
  • Port sending, drop means that the node where the current network element where the optical signal arrives is the destination node, and the service data is sent to the terminal through demultiplexing. From this, it can be seen that the adding and dropping of services in the current network element will affect the optical signal and cause the power offset of the channel. To avoid the influence of the power offset on the subsequent transmission process, power equalization needs to be performed.
  • the power equalizer is located only forwards optical signals, but also includes relay network elements that convert the wavelength of optical signals.
  • the relay network elements are also provided with power equalizers. Since the power before and after the relay may change, it is necessary to consider the channel power before the relay network element and after the relay network element. This part will be explained later by way of example;
  • the device implements the function of the power equalizer. For example, in the Optical Line Amplifier (OLA) network element, the power equalization process is implemented through the channel power detector and the channel power actuator. Therefore, it should be understood that the power equalization in the embodiments of the present application
  • a device represents a single device or a combination of devices capable of channel power query and power balancing.
  • Step S200 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.
  • the number of optical amplifiers in the optical network is also increasing, and the optical amplifiers that the service optical signal needs to pass through from the source node to the target node also increase accordingly.
  • Factors such as aging, nonlinear amplification caused by optical amplifiers will cause uneven channel power. Therefore, it is necessary to set a power equalizer in the node to adjust and compensate the power of the channel where the optical signal is located, so as to ensure the signal stability of the optical network.
  • the power deviation at the upstream power balancer will affect the power at the downstream power balancer. Therefore, when a node in the service transmission path detects an abnormal power, it needs to send a power balance adjustment amount to the power balancer of the node.
  • the power equalizer adjusts the abnormal power according to the power equalization adjustment amount. After the adjustment, the power detected at the downstream power detection point of the power equalizer is also affected, so it needs to continue to adjust downstream. Obviously, the downstream power equalization needs to wait until the upstream power equalization is completed, and the power equalization efficiency is low, and during the power equalization process, the opening of new services is affected.
  • the embodiment of the present application obtains two actual powers at the upstream power equalizer and the downstream power equalizer through step S200, and simultaneously according to the upstream power equalizer and the downstream power equalizer
  • the power equalization gain adjustment of the downstream power equalizer is calculated through the above four power data. The purpose of this calculation is to exclude the upstream first target power and The effect of the first actual power on the downstream, thereby enabling individual adjustment of the downstream power equalizer. It should be noted that in the service transmission path, power equalization is usually not performed for only one node with abnormal power.
  • the embodiment of the present application aims to send the corresponding power equalization gain adjustment amount to multiple power equalizers in the service transmission path at the same time, so that the multiple power equalizers perform power equalization at the same time, thereby improving the efficiency of power equalization .
  • the first power equalizer on the service transmission path is not calculated according to this step, because the first power equalizer is in the most upstream, and the power equalization gain adjustment cannot be obtained by the method in this step.
  • the first power equalizer can The power adjustment is performed according to conventional or other special power equalization methods.
  • the calculation method of the power equalization gain adjustment amount can be adjusted according to the actual situation of the optical network. For example, through a simple subtraction operation, the upstream power data is subtracted from the downstream power data, so as to exclude the influence of the upstream power, wherein, The calculation method of the power data can also be adjusted according to the actual situation. For example, the square root of the first target power is 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 embodiment of the present application does not limit the calculation method of the power equalization gain adjustment amount.
  • Step S300 sending the power equalization gain adjustment amount to the downstream power equalizer, so that the downstream power equalizer performs power adjustment.
  • the power controller After the power controller calculates the power equalization gain adjustment amount in step S200, it sends it to the downstream power equalizer, so that the downstream power equalizer performs power equalization on the channel with abnormal power according to the power equalization gain adjustment amount.
  • the power controller sends a channel power adjustment instruction to the power equalizer while sending the power equalization gain adjustment amount to the power equalizer, and uses the instruction to notify the power equalizer to perform power equalization according to the received power equalization gain adjustment amount
  • the power equalizer has the function of triggering the automatic execution of power equalization according to the power equalization gain adjustment amount, then the power controller may not send the channel power adjustment command to the power equalizer when sending the power equalization gain adjustment amount,
  • the power equalizer can be automatically triggered to perform power equalization. It can be understood that, after receiving the power equalization gain adjustment amount, power equalizers of different manufacturers may be preset with different power equalization processes, and the working mode of the power equalizer is not limited herein.
  • the first target power and the second target power are obtained by:
  • Step S210 acquiring first channel information of the optical signal at the upstream power equalizer and second channel information at the downstream power equalizer;
  • Step S220 calculating and obtaining the first target power according to the first channel information, and calculating and obtaining the second target power according to the second channel information.
  • the target power and target power are calculated by the power controller through the channel information measured at the power balancer.
  • the power controller periodically or according to the set time sends a power query request to each power balancer in the optical network.
  • the controller queries the channel information of each channel through the power equalizer.
  • the channel information includes one or more of the channel wavelength, span attenuation, fiber type, modulation code rate and rate.
  • the controller calculates the target power of each channel at the power equalizer according to the received channel information. Specifically, referring to FIG. 3 , the method for obtaining the first channel information and the second channel information in this embodiment of the present application includes the following steps:
  • Step S211 sending power query requests to the upstream power equalizer and the downstream power equalizer respectively;
  • 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.
  • the power controller sends a power query request to the upstream power equalizer, inquires about 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 according to the first channel information Get the first target power.
  • the embodiment of the present application obtains the channel information of the power equalizer through a power query request, thereby calculating the target power, which provides a data basis for calculating the power offset.
  • the first actual power and the second actual power are obtained in the following manner:
  • Step S230 sending the first target power to the upstream power equalizer, and sending the second target power to the downstream power equalizer
  • Step S240 Receive the first actual power returned by the upstream power equalizer and the second actual power returned by the downstream power equalizer.
  • the power equalizer will receive the target power returned by the power controller after responding to the power query request of the power controller. At this time, the power equalizer will compare the received target power with the actual power. The difference between the power and the actual power is greater than the set threshold value (different power equalizers may have different threshold values), the power equalizer returns the actual power to the power controller to trigger the power controller to perform the adjustment calculation .
  • the power equalizer when the power equalizer detects that the difference between the target power and the actual power is greater than the set threshold value, in addition to returning the actual power to the power controller, it also sends a power equalization request to the power controller, The power controller performs the adjustment calculation according to the received power equalization request and the actual power; in other embodiments, if the power controller has the function of automatically triggering the adjustment calculation according to the actual power returned by the power equalizer, it does not The power equalizer is required to send a power equalization request at the same time. This is because the actual power sent by the power equalizer has an identification field. After the power controller receives the actual power and identifies the identification field, it can locate which power the current actual power corresponds to.
  • Step S400 calculating a power deviation value between the second actual power and the second target power
  • Step S500 it is determined that the power offset value exceeds a preset power offset threshold value.
  • 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, That is, the power offset value. If the power offset value exceeds the preset power offset threshold, it is determined that power equalization needs to be performed.
  • the power data for calculating the power equalization gain adjustment amount can be obtained.
  • the calculation method of the power equalization gain adjustment amount includes the following steps:
  • Step S250 obtaining the target power gain of the optical signal from the upstream power equalizer to the downstream power equalizer according to the first target power and the second target power;
  • Step S260 obtaining the actual power gain of the optical signal from the upstream power equalizer to the downstream power equalizer according to the first actual power and the second actual power;
  • Step S270 obtaining a power equalization gain adjustment amount according to the target power gain and the actual power gain.
  • P d (n) represents the target power of the nth power equalizer
  • P d (n-1) represents the target power of the n-1th power equalizer on the same service transmission path
  • P a (n) The actual power of the nth power equalizer
  • P a (n-1) represents the actual power of the n-1th power equalizer
  • G t (n) represents the power equalization gain adjustment amount of the nth power equalizer.
  • step S260 The calculation method of the actual power gain G a (n) in step S260 is as follows:
  • G a (n) P a (n)-P a (n-1)
  • step S270 the calculation method of the power equalization gain adjustment amount G t (n) is as follows:
  • n-1th power equalizer and nth power equalizer are actually represented as the upstream power equalizer and the downstream power equalizer.
  • the service transmission path can be obtained.
  • the power situation of all power equalizers and the power equalization gain adjustment amount of each power equalizer, so that the power equalization gain adjustment amount can be sent to the corresponding power equalizer in parallel, so that each power equalizer can perform power equalization independently without the need for Power equalization is performed sequentially in the upstream and downstream order, which greatly improves the efficiency of power equalization, quickly completes power convergence, meets the time requirements for power equalization, and quickly enables and restores services.
  • using the present application can also ensure that the channel power balance can be safely and effectively implemented in a complex lattice network, and can solve the problem of opening new services without affecting the normal transmission of existing services.
  • step S300 After the power controller sends the power equalization gain adjustment amount to the power equalizer, it needs to confirm whether each power equalizer successfully performs the power equalization. Therefore, referring to FIG. 7 , after step S300 is performed in this embodiment of the present application, the following steps are further included:
  • Step S410 initiating a power query request
  • Step S420 obtaining the actual power adjusted by the downstream power equalizer according to the power equalization gain adjustment amount
  • Step S430 update the second actual power according to the adjusted actual power.
  • the power controller confirms the current actual power after each power equalizer performs power equalization by re-initiating a power query request, updates the new actual power to the original actual power, and re-compares the difference between the updated actual power and the target power Whether the preset power offset threshold value is exceeded, if so, perform power equalization again according to the above-mentioned power equalization method.
  • the embodiment of the present application can greatly speed up the power equalization efficiency and realize rapid power convergence.
  • FIG. 8 shows the connection relationship between the power equalizer and the power controller on the same service transmission path in the optical network in a schematic diagram, wherein the network element where each power equalizer is located is ROADM (Reconfigurable Optical Add-Drop Multiplexer). , reconfigurable optical add/drop multiplexing equipment) network element, that is, the power equalizer is embedded in the ROADM network element, and the power controller connects each power equalizer and performs the following power equalization method, referring to Figure 9:
  • ROADM Reconfigurable Optical Add-Drop Multiplexer
  • Step S501 sending power query requests respectively to the power equalizers on the same service transmission path;
  • Step S502 receiving channel information returned by each power equalizer according to the power query request
  • Step S503 calculating the target power of each power equalizer according to the channel information, and sending the target power to the corresponding power equalizer respectively;
  • Step S504 receiving the power equalization request and the actual power returned by the power equalizer, and the power equalization request is sent after the power equalizer judges that the difference between the actual power and the received target power is greater than the offset threshold;
  • Step S505 perform a power equalization, and obtain the power equalization gain adjustment amount of each power equalizer according to the target power and actual power of the upstream and downstream power equalizers;
  • Step S506 sending the power equalization gain adjustment amount to the corresponding power equalizer, so that the power equalizer performs power equalization adjustment in parallel;
  • 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 value, then enter the monitoring state, otherwise,
  • the above steps S505 to S506 are re-executed.
  • the calculation of the power equalization gain adjustment amount is calculated according to the following formula:
  • P d (n) denotes the target power of the nth power equalizer
  • P d (n-1) denotes the target power of the n-1th power equalizer on the same service transmission path
  • P a (n) denotes the target power of the nth power equalizer
  • the actual power of n power equalizers P a (n-1) represents the actual power of the n-1th 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.
  • the monitoring state in the above step S507 may be that the power controller sends a power query request at regular intervals, or the power controller triggers to send a power query request according to the service request.
  • the ROADM network elements on the service transmission path can be made to perform power equalization in parallel, so that each power equalizer can independently perform power equalization, and it is not necessary to perform power equalization in the order of upstream and downstream, which greatly improves the power Balanced efficiency, fast power convergence.
  • FIG. 10 shows the connection relationship between the power equalizer and the power controller on the same service transmission path in the optical network in the form of a schematic diagram.
  • the network element where one power equalizer is located is the relay network element, and the other power equalizers
  • the network element where it is located is the ROADM network element.
  • the power controller is connected to each power equalizer, and the power equalization method implemented in the ROADM network element is the same as the power equalization method in Example 1.
  • the difference lies in the power equalization method implemented in the relay network element.
  • Equalizer the two power equalizers are adjusted according to the channel wavelengths before and after the relay, refer to Figure 11:
  • Step S601 sending power query requests respectively to the power equalizers on the same service transmission path;
  • Step S602 identifying the position of the relay network element in the route according to the service transmission path, and receiving the channel information of the front channel wavelength of the relay network element and the channel wavelength behind the relay network element;
  • Step S603 obtain the target power of the wavelength channels before and after the relay network element according to the channel information of the wavelength of the front channel of the relay network element and the channel wavelength of the rear channel of the relay network element, and send the target power to the power equalizer in the relay network element, Wherein, two power equalization points before and after the power equalizer of the relay network element receive the corresponding target power respectively;
  • Step S604 receive the power equalization request and the actual power returned by the power equalizer, and the power equalization request is sent after the power equalizer judges that the difference between the actual power and the received target power is greater than the offset threshold value;
  • Step S605 perform a power equalization, and obtain the power equalization gain adjustment amount of each power equalizer according to the target power and actual power of the upstream and downstream power equalizers;
  • Step S606 sending the power equalization gain adjustment amount to the corresponding power equalizer, so that the power equalizers perform power equalization adjustment in parallel, wherein the power equalizer of the relay network element is based on the respective power equalization gains of the two power equalization points before and after The adjustment amount performs power equalization;
  • Step S607 check the actual power of each power equalizer after power equalization, and confirm whether the power equalization is successful.
  • the calculation formula of the power equalization gain adjustment amount is the same as that of Example 1, and will not be described herein again.
  • the front and rear power equalization points of the relay network element can actually be regarded as the front and rear power equalizers, so the power equalization is also performed according to the above calculation formula.
  • FIG. 12 shows the connection relationship between the power equalizer and the power controller on the same service transmission path in the optical network in a schematic way, wherein some of the network elements where the power equalizers are located are the OLA network elements, and the other part of the power equalization
  • the network element where the controller is located is the ROADM network element.
  • the OLA network element implements the function of the power equalizer through the channel power detector and the channel power actuator.
  • the power equalizer is used to represent the channel power detector and the channel power actuator in the OLA network element.
  • the power controller is connected to each power equalizer and executes the power equalization method from steps S501 to S507.
  • a second aspect of the embodiments of the present application provides an optical transport network element, including at least one processor and a memory for communicating with the at least one processor; the memory stores instructions that can be executed by the at least one processor, and the instructions Executed by at least one processor to enable the at least one processor to execute the method for power balancing of an optical network of the aforementioned first aspect.
  • the control processor 1001 and the memory 1002 in the network element 1000 of the optical transport network can be connected through a bus.
  • the memory 1002 can be used to store non-transitory software programs and non-transitory computer-executable programs.
  • memory 1002 may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk memory, flash memory device, or other non-transitory solid state storage device.
  • the memory 1002 may optionally include memory located remotely from the control processor 1001, and these remote memories may be connected to the optical transport network element 1000 through a network. Examples of such networks include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.
  • the device structure shown in FIG. 13 does not constitute a limitation on the network element 1000 of the optical transport network, and may include more or less components than those shown in the figure, or combine some components, or different Component placement.
  • the power equalization gain adjustment amount can be given to multiple power equalization points on the service transmission path at the same time.
  • the embodiment of the present application can greatly improve the efficiency of power balancing and rapidly realize power convergence.
  • a third aspect of the embodiments of the present application provides a computer-readable storage medium, where the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are executed by one or more control processors, for example, by FIG. Executed by one control processor 1001 in 13, the above-mentioned one or more control processors can execute the power balancing method of the optical network in the above-mentioned method embodiments, for example, to execute the above-described method steps S100 to S300 in FIG. 1 , the method steps S210 to S220 in FIG. 2, the method steps S211 to S212 in FIG. 3, the method steps S230 to S240 in FIG. 4, the method steps S400 to S500 in FIG. 5, the method in FIG. 6 Steps S250 to S270 , method steps S410 to S430 in FIG. 7 , method steps S501 to S507 in FIG. 9 , and method steps S601 to S607 in FIG. 11 .
  • the power equalization gain adjustment amount needs to be calculated for the power equalizer.
  • the power offset of the same optical signal at the upstream power equalizer of the power equalizer enables the calculated power equalization gain adjustment to exclude the influence of the upstream span gain adjustment, thereby enabling multiple power equalization on the service transmission path.
  • the embodiment of the present application can greatly improve the efficiency of power equalization and quickly realize power convergence.
  • Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cartridges, magnetic tape, magnetic disk storage or other magnetic storage devices, or may Any other medium used to store desired information and which can be accessed by a computer.
  • communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and can include any information delivery media, as is well known to those of ordinary skill in the art .

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Abstract

一种光网络的功率均衡方法、光传送网网元及存储介质，其中，功率均衡方法包括获取光信号在上游功率均衡器处的第一目标功率和第一实际功率，以及在下游功率均衡器处的第二目标功率和第二实际功率（S100）；根据第一目标功率、第一实际功率、第二目标功率和第二实际功率得到下游功率均衡器的功率均衡增益调整量（S200）；将功率均衡增益调整量发送到下游功率均衡器以使下游功率均衡器进行功率调整（S300）。

Description

光网络的功率均衡方法、光传送网网元及存储介质
相关申请的交叉引用
本申请基于申请号为202011140487.5、申请日为2020年10月22日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本申请涉及通信技术领域，尤其涉及一种光网络的功率均衡方法、光传送网网元及存储介质。
背景技术
在密集波分复用(Dense Wavelength Division Multiplexing，简称DWDM)网络中，承载业务信息的光信号往往需要经过多级放大器才能到达目标节点，光信号在业务路径上传输过程中，为了克服放大器带来的不均衡特性以及非线性转移带来的影响，需要在途径的网元中对光信号进行功率均衡，以保证DWDM网络的传输质量。
在一些情况下，应用传统的功率均衡技术需要考虑上下游网元进行功率均衡过程中光信号造成的互相影响，需要按照业务传输路径从上游节点开始依次向下游节点进行调整，每个节点都需要等待相邻的上游节点调整完成，因此功率均衡效率较低。
发明内容
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
本申请实施例提供了一种光网络的功率均衡方法、光传送网网元及存储介质，能够排除上游节点跨段增益调整对当前网元功率均衡的影响，提高功率均衡效率。
第一方面，本申请实施例提供了一种光网络的功率均衡方法，所述光网络包括设置在同一业务传输路径上的上游功率均衡器和下游功率均衡器，所述功率均衡方法包括：获取光信号在上游功率均衡器处的第一目标功率和第一实际功率，以及在下游功率均衡器处的第二目标功率和第二实际功率；根据所述第一目标功率、所述第一实际功率、所述第二目标功率和所述第二实际功率得到所述下游功率均衡器的功率均衡增益调整量；将所述功率均衡增益调整量发送到所述下游功率均衡器以使所述下游功率均衡器进行功率调整。
第二方面，本申请实施例提供了一种光传送网的光传送网网元，包括至少一个处理器和用于与所述至少一个处理器通信连接的存储器；所述存储器存储有能够被所述至少一个处理器执行的指令，所述指令被所述至少一个处理器执行，以使所述至少一个处理器能够执行前述的光网络的功率均衡方法。
第三方面，本申请实施例提供了一种网元，包括前述第二方面的光传送网的光传送网网元。
第四方面，本申请实施例提供了一种计算机可读存储介质，所述计算机可读存储介质存储有计算机可执行指令，所述计算机可执行指令用于使计算机执行前述第一方面的光网络的 功率均衡方法。
本申请的其它特征和优点将在随后的说明书中阐述，并且，部分地从说明书中变得显而易见，或者通过实施本申请而了解。本申请的目的和其他优点可通过在说明书、权利要求书以及附图中所特别指出的结构来实现和获得。
附图说明
附图用来提供对本申请技术方案的进一步理解，并且构成说明书的一部分，与本申请的示例一起用于解释本申请的技术方案，并不构成对本申请技术方案的限制。
图1是本申请第一方面一个实施例提供的功率均衡方法的流程图；
图2是本申请第一方面一个实施例提供的功率均衡方法中获取目标功率的流程图；
图3是本申请第一方面一个实施例提供的功率均衡方法中获取通道信息的流程图；
图4是本申请第一方面一个实施例提供的功率均衡方法中获取实际功率的流程图；
图5是本申请第一方面一个实施例提供的功率均衡方法中确定功率偏移的流程图；
图6是本申请第一方面一个实施例提供的功率均衡方法中功率均衡增益调整量的计算过程的流程图；
图7是本申请第一方面一个实施例提供的功率均衡方法中确认功率调整是否成功的流程图；
图8是本申请示例一的功率均衡链路的连接示意图；
图9是本申请示例一的功率均衡方法的流程图；
图10是本申请示例二的功率均衡链路的连接示意图；
图11是本申请示例二的功率均衡方法的流程图；
图12是本申请示例三的功率均衡链路的连接示意图；
图13是本申请实施例第二方面提供的光传送网网元的装置结构示意图。
具体实施方式
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本申请，并不用于限定本申请。
本申请实施例提供了一种光网络的功率均衡方法、光传送网网元及存储介质，为功率均衡器计算功率均衡增益调整量的时候，考虑当前功率均衡器的上游功率均衡器同一光信号的功率偏移情况，通过排除上游的功率偏移，从而能够对业务传输路径上多个功率均衡点同时给出功率均衡增益调整量，无需从上游开始向下游依次调整，提高功率均衡效率。
下面结合附图，对本申请实施例作进一步阐述。
参照图1，本申请实施例第一方面提供了一种光网络的功率均衡方法，该光网络包括设置在同一业务传输路径上的上游功率均衡器和下游功率均衡器，本申请实施例的功率均衡方法包括但不限于步骤S100、步骤S200和步骤S300。
步骤S100，获取光信号在上游功率均衡器处的第一目标功率和第一实际功率，以及在下游功率均衡器处的第二目标功率和第二实际功率。
光信号在光网络中基于路由信息从源节点向目的节点传输，路由信息给出了光信号需要 依次经过哪些节点，因此节点之间形成上游和下游的关系。为了实现对光信号的功率均衡，确定当前节点中各个通道的功率，节点中设置有功率均衡器，通过功率均衡器检测当前节点中各个通道的功率。当功率均衡器检测到当前节点中某通道的实际功率偏离参照功率值超过一定限度，就触发对该通道的功率调整。可以理解的是，为了实现对各个节点中功率均衡器的管理，光网络中还设置有一个或一组功率控制器，功率控制器连接各个功率均衡器，对功率均衡器发起功率查询以及向功率均衡器发送功率调整量。
为了确定是否发生功率偏移，需要获取光信号在功率均衡器处的实际值和参照值，即分别对应步骤S100中的实际功率和目标功率，通过对比实际功率和目标功率，可以得知光信号在当前功率均衡器处是否出现功率偏移。由于本申请实施例需要排除上游功率均衡器对下游功率均衡器的影响，因此在步骤S100中需要获取上游功率均衡器和下游功率均衡器的功率信息，分别是第一实际功率、第一目标功率、第二实际功率和第二目标功率，这些数据是步骤S200的计算基础。其中，目标功率通过功率控制器计算得到，例如，功率控制器向各个功率均衡器发送功率查询请求，此时功率均衡器返回自身各个通道的通道信息，如通道的业务波长、传输带宽、传输速率、调制码型等，功率控制器根据上述通道信息可以计算得到对应功率均衡器的目标功率。
可以理解的是，进行功率均衡的光网络属于DWDM网络。DWDM网络的网元中存在业务上路和下路，上路是指当前网元有新的业务数据加入，当前网元通过波分复用将新的业务数据连同其他数据复用成光信号向下一个端口发送，下路是指光信号到达的当前网元所在的节点是目的节点，通过解复用将业务数据发送到终端机。由此可知，当前网元内业务的上下路都会对光信号造成影响，造成通道的功率偏移，为了避免功率偏移对后续传输过程造成影响，需要执行功率均衡。值得注意的是，功率均衡器所在的网元并不全部都只对光信号进行转发，还包括对光信号的波长进行转换的中继网元，中继网元中同样设置有功率均衡器，由于中继前后的功率可能发生变化，因此需要考虑中继网元前和中继网元后的通道功率，这一部分将在后面以示例的方式进行说明；另外，在某些网元中通过另外的器件实现功率均衡器的功能，例如光线路放大(Optical Line Amplifier，OLA)网元中通过通道功率检测器和通道功率执行器实现功率均衡过程，因此应理解，本申请实施例中的功率均衡器表示能够进行通道功率查询和执行功率均衡的单个器件或多个器件的组合。
步骤S200，根据第一目标功率、第一实际功率、第二目标功率和第二实际功率得到下游功率均衡器的功率均衡增益调整量。
随着光网络的发展，光网络中的光放大器的数量也越来越多，业务光信号从源节点到目标节点需要经过的光放大器也相应增加，由于光纤和光放大器并非理想器件，光纤的损伤、老化以及光放大器带来的非线性放大等因素都会造成通道功率的不平坦，因此需要在节点中设置功率均衡器，对光信号所在通道的功率进行调整补偿，从而保证光网络的信号稳定。目前来说，上游功率均衡器处的功率偏差会影响下游功率均衡器处的功率，因此当业务传输路径中某节点检测到功率异常，就需要向该节点的功率均衡器发送一个功率均衡调整量，功率均衡器根据功率均衡调整量对异常的功率进行调整，调整后，该功率均衡器的下游功率检测点处检测到的功率也受到影响，因此需要继续向下游调整。显然可知，下游的功率均衡需要等到上游的功率均衡完成，功率均衡效率较低，而且在功率均衡过程中，影响新业务的开通，需要等到功率均衡完成后才能让新业务的光信号上路。
为了提高功率均衡的效率，使多个功率均衡器并行进行功率均衡，本申请实施例通过步骤S200取得上游功率均衡器和下游功率均衡器处的两个实际功率，同时根据上游功率均衡器和下游功率均衡器的两个目标功率，通过上述四个功率数据计算下游功率均衡器的功率均衡增益调整量，这样计算的目的在于，在计算功率均衡增益调整量的时候排除上游的第一目标功率和第一实际功率对下游的影响，从而实现对下游功率均衡器的单独调整。应该注意的是，在业务传输路径中通常不会只针对一个发生功率异常的节点执行功率均衡，因此当前节点的功率均衡器如果检测到功率异常，那么对当前节点执行功率均衡必然会影响下游功率均衡器的功率情况，因此本申请实施例旨在对业务传输路径中的多个功率均衡器同时发送对应的功率均衡增益调整量，使多个功率均衡器同时执行功率均衡从而提高功率均衡的效率。值得注意的是，该业务传输路径上首个功率均衡器不按照本步骤计算，因为首个功率均衡器处于最上游，不能通过本步骤的方法得到功率均衡增益调整量，首个功率均衡器可以按照常规的或者其他特殊的功率均衡方法进行功率调整。
可以理解的是，功率均衡增益调整量的计算方法可以根据光网络的实际情况调整，例如通过简单的减法运算，用下游的功率数据减去上游的功率数据，从而排除上游的功率影响，其中，功率数据的计算方式也可以根据实际情况调整，例如，第一目标功率的平方根减去第一实际功率的平方根，得到上游的功率增益量。上述计算方式仅是一种可行性示例，本申请实施例对功率均衡增益调整量的计算方法并没有做出限定。
步骤S300，将功率均衡增益调整量发送到下游功率均衡器以使下游功率均衡器进行功率调整。
功率控制器通过步骤S200计算得到功率均衡增益调整量后，将其发送至下游功率均衡器，使得下游功率均衡器按照功率均衡增益调整量对发生功率异常的通道进行功率均衡。在一些情况下，功率控制器向功率均衡器发送功率均衡增益调整量的同时还向功率均衡器发送通道功率调整指令，利用该指令通知功率均衡器根据接收到的功率均衡增益调整量执行功率均衡，在另一些情况下，功率均衡器具有根据功率均衡增益调整量触发自动执行功率均衡的功能，那么功率控制器在发送功率均衡增益调整量的时候可以不向功率均衡器发送通道功率调整指令，功率均衡器可以自动触发执行功率均衡。可以理解的是，接收到功率均衡增益调整量后，不同厂家的功率均衡器可能预设有不同功率均衡流程，在此不对功率均衡器的工作方式作出限制。
在一些实施例中，参照图2，第一目标功率和第二目标功率通过以下方式获取：
步骤S210，获取光信号在上游功率均衡器处的第一通道信息和在下游功率均衡器处的第二通道信息；
步骤S220，根据第一通道信息计算得到第一目标功率，根据第二通道信息计算得到第二目标功率。
目标功率和目标功率是功率控制器通过功率均衡器处测得的通道信息计算得到的，功率控制器周期性地或根据设定时间向光网络中各个功率均衡器发送功率查询请求，当功率均衡器接收到功率控制器发送的功率查询请求，查询各通道经功率均衡器的通道信息，通道信息包括通道波长、跨段衰减、光纤类型、调制码率和速率中的一个或多个，功率控制器根据接收到的通道信息计算出各个通道在功率均衡器处的目标功率。具体来说，参照图3，在本申请实施例中获取第一通道信息和第二通道信息的方法包括如下步骤：
步骤S211，向上游功率均衡器和下游功率均衡器分别发送功率查询请求；
步骤S212，接收上游功率均衡器根据功率查询请求返回的第一通道信息，接收下游功率均衡器根据功率查询请求返回的第二通道信息。
由于第一目标功率和第二目标功率的计算方式相同，因此下面以第一目标功率为例进行说明。功率控制器向上游功率均衡器发送功率查询请求，查询上游功率均衡器的第一通道信息(以第一通道信息指代上游功率均衡器中其中一个通道的通道信息)，根据第一通道信息计算得到第一目标功率。本申请实施例通过功率查询请求获得功率均衡器的通道信息，从而计算出目标功率，为计算功率偏移提供了数据基础。
在一实施例中，参照图4，第一实际功率和第二实际功率通过以下方式获取：
步骤S230，将第一目标功率发送到上游功率均衡器，将第二目标功率发送到下游功率均衡器；
步骤S240，接收上游功率均衡器返回的第一实际功率和下游功率均衡器返回的第二实际功率。
在本实施例中，功率均衡器在响应功率控制器的功率查询请求后，将接收到功率控制器返回的目标功率，此时功率均衡器将接收到的目标功率和实际功率进行对比，当目标功率与实际功率之间的差值大于设定的门限值(不同功率均衡器可能具有不同的门限值)，功率均衡器则向功率控制器返回实际功率以触发功率控制器执行调整量计算。在一些实施例中，功率均衡器在检测到目标功率和实际功率之间的差值大于设定的门限值时，除了向功率控制器返回实际功率，还向功率控制器发送功率均衡请求，功率控制器根据接收到的功率均衡请求和实际功率执行调整量计算；在另一些实施例中，如果功率控制器具有根据功率均衡器返回的实际功率自动触发执行调整量计算的功能，那么就不要求功率均衡器同时发送功率均衡请求，这是由于功率均衡器发送的实际功率带有标识字段，功率控制器接收到实际功率后识别该标识字段即可定位到当前的实际功率是对应哪一个功率均衡器中的哪一路通道，从而在功率控制器内部进行目标功率和实际功率的比较，具体来说，参照图5，在功率控制器内部计算功率偏移量的实施例中，功率控制器在得到功率均衡增益调整量之前，还执行以下步骤：
步骤S400，计算第二实际功率与第二目标功率的功率偏离值；
步骤S500，确定功率偏离值超过预设功率偏移门限值。
可以理解的是，上述实施例中功率控制器需要接收业务传输路径上所有功率均衡器返回的实际功率，并将实际功率与对应通道的目标功率进行比较，得到实际功率与目标功率的差值，即功率偏离值，如果该功率偏离值超过预设功率偏移门限，那么则判断需要执行功率均衡。
综上，通过步骤S210、步骤S220、步骤S230和步骤S240，可以得到计算功率均衡增益调整量的功率数据，在一实施例中，参照图6，功率均衡增益调整量的计算方法包括如下步骤：
步骤S250，根据第一目标功率和第二目标功率得到光信号从上游功率均衡器到下游功率均衡器的目标功率增益；
步骤S260，根据第一实际功率和第二实际功率得到光信号从上游功率均衡器到下游功率均衡器的实际功率增益；
步骤S270，根据目标功率增益和实际功率增益得到功率均衡增益调整量。
以P d(n)表示第n个功率均衡器的目标功率，以P d(n-1)表示同一业务传输路径上第n-1个功率均衡器的目标功率，以P a(n)表示第n个功率均衡器的实际功率，以P a(n-1)表示第n-1个功率均衡器的实际功率，G t(n)表示第n个功率均衡器的功率均衡增益调整量。由此可得，步骤S250中目标功率增益G d(n)计算方法如下：
G d(n)＝P d(n)-P d(n-1)
步骤S260中实际功率增益G a(n)计算方法如下：
G a(n)＝P a(n)-P a(n-1)
步骤S270中功率均衡增益调整量G t(n)计算方法如下：
G t(n)＝G a(n)-G d(n)＝P a(n)-P a(n-1)-(P d(n)-P d(n-1))
可以理解的是，上述第n-1个功率均衡器和第n个功率均衡器实际就是表示为上游功率均衡器和下游功率均衡器，通过上述计算公式进行递推，即可得到业务传输路径上所有功率均衡器的功率情况以及各个功率均衡器的功率均衡增益调整量，从而可以将功率均衡增益调整量并行发送到对应的功率均衡器，使得各个功率均衡器能够独立执行功率均衡，而不需要按照上下游顺序依次执行功率均衡，大大提升了功率均衡的效率，快速完成功率收敛，满足实现功率均衡的时间要求，快速开通和恢复业务。另外，使用本申请还可以保证通道功率均衡在复杂格型网络中安全有效落地，可以解决在开通新业务的同时不影响现有业务的正常传输。
当功率控制器向功率均衡器发送功率均衡增益调整量后，需要确认各个功率均衡器是否成功执行该次功率均衡，因此，参照图7，本申请实施例执行步骤S300后，还包括如下步骤：
步骤S410，发起功率查询请求；
步骤S420，获取下游功率均衡器根据功率均衡增益调整量调整后的实际功率；
步骤S430，根据调整后的实际功率更新第二实际功率。
功率控制器通过重新发起功率查询请求确认各个功率均衡器执行功率均衡后当前的实际功率，并将新获得的实际功率更新原来的实际功率，并重新对比更新后的实际功率和目标功率的差值是否超过预设功率偏移门限值，如果超过，那么按照上述功率均衡方法重新执行一次功率均衡。
通过上述实施例的功率均衡方法，在检测到功率异常时，获取业务传输路径上各个功率均衡器的实际功率和通过计算得到的目标功率，根据上述功率均衡增益调整量G t(n)的计算方法，得到除首个功率均衡器外各个功率均衡器的功率均衡增益调整量，并将功率均衡增益调整量发送到对应的功率均衡器处，使得业务传输路径上的各个功率均衡器能够并行执行功率均衡，相比于传统从上游到下游依次进行功率均衡的方法，本申请实施例能够大大加快功率均衡效率，实现功率快速收敛。
下面以几个实际例子对本申请实施例进行说明：
示例一
参照图8，图8以示意图的方式给出光网络中同一业务传输路径上功率均衡器和功率控制器的连接关系，其中，各个功率均衡器所处的网元是ROADM(Reconfigurable Optical Add-Drop Multiplexer，可重构光分插复用设备)网元，即功率均衡器嵌入到ROADM网元中，功率控制器连接各个功率均衡器并执行如下功率均衡方法，参照图9：
步骤S501，向同一业务传输路径上的功率均衡器发送分别发送功率查询请求；
步骤S502，接收各个功率均衡器根据功率查询请求返回的通道信息；
步骤S503，根据通道信息计算各个功率均衡器的目标功率，并将目标功率分别发送到对应的功率均衡器；
步骤S504，接收功率均衡器返回的功率均衡请求和实际功率，该功率均衡请求为功率均衡器判断实际功率和接收到的目标功率之间差值大于偏移门限值后发送；
步骤S505，执行一次功率均衡，根据上下游功率均衡器的目标功率和实际功率得到各个功率均衡器的功率均衡增益调整量；
步骤S506，将功率均衡增益调整量发送到对应的功率均衡器，以使功率均衡器并行执行功率均衡调节；
步骤S507，发送功率查询请求以确定当前业务传输路径上各个功率均衡器的实际功率，如果功率均衡后的实际功率和目标功率的差值不超过偏移门限值，则进入监测状态，否则，重新执行上述步骤S505至步骤S506。
其中，功率均衡增益调整量的计算按照如下公式计算：
G t(n)＝G a(n)-G d(n)＝P a(n)-P a(n-1)-(P d(n)-P d(n-1))
P d(n)表示第n个功率均衡器的目标功率，以P d(n-1)表示同一业务传输路径上第n-1个功率均衡器的目标功率，以P a(n)表示第n个功率均衡器的实际功率，以P a(n-1)表示第n-1个功率均衡器的实际功率，G t(n)表示第n个功率均衡器的功率均衡增益调整量，G a(n)表示第n个功率均衡器的实际功率增益，G d(n)表示第n个功率均衡器的目标功率增益。
上述步骤S507中监测状态，可以是功率控制器每隔一段时间发送一次功率查询请求，也可以是功率控制器根据业务请求触发发送一次功率查询请求。
通过上述步骤S501至步骤S507，可以使业务传输路径上的ROADM网元并行执行功率均衡，使得各个功率均衡器能够独立执行功率均衡，而不需要按照上下游顺序依次执行功率均衡，大大提升了功率均衡的效率，快速完成功率收敛。
示例二
参照图10，图10以示意图的方式给出光网络中同一业务传输路径上功率均衡器和功率控制器的连接关系，其中一个功率均衡器所在的网元为中继网元，其余各个功率均衡器所处的网元是ROADM网元。
功率控制器连接各个功率均衡器，并且在ROADM网元中执行的功率均衡方法与示例一的功率均衡方法相同，区别在于在中继网元中执行的功率均衡方法，中继前后分别设置有功率均衡器，两个功率均衡器分别按照中继前后的通道波长的情况进行调整，参照图11：
步骤S601，向同一业务传输路径上的功率均衡器发送分别发送功率查询请求；
步骤S602，按照业务传输路径识别中继网元在路由中的位置，并接收中继网元前通道波长和中继网元后通道波长的通道信息；
步骤S603，根据中继网元前通道波长和中继网元后通道波长的通道信息得到中继网元前后波长通道的目标功率，并将目标功率发送到中继网元中的功率均衡器，其中，中继网元的功率均衡器的前后两个功率均衡点分别接收对应的目标功率；
步骤S604，接收功率均衡器返回的功率均衡请求和实际功率，该功率均衡请求为功率均 衡器判断实际功率和接收到的目标功率之间差值大于偏移门限值后发送；
步骤S605，执行一次功率均衡，根据上下游功率均衡器的目标功率和实际功率得到各个功率均衡器的功率均衡增益调整量；
步骤S606，将功率均衡增益调整量发送到对应的功率均衡器，以使功率均衡器并行执行功率均衡调节，其中，中继网元的功率均衡器根据前后两个功率均衡点各自的功率均衡增益调整量执行功率均衡；
步骤S607，检查功率均衡后各个功率均衡器的实际功率，确认功率均衡是否成功。
其中，功率均衡增益调整量的计算公式与示例一相同，在此不再说明。对于中继网元的前后两个功率均衡点，实际上可以看作前后两个功率均衡器，因此也同样按照上述计算公式进行功率均衡。
示例三
参照图12，图12以示意图的方式给出光网络中同一业务传输路径上功率均衡器和功率控制器的连接关系，其中，一部分功率均衡器所处的网元是OLA网元，另外一部分功率均衡器所处的网元是ROADM网元。其中，OLA网元通过通道功率检测器和通道功率执行器实现功率均衡器的功能，为了方便后面表述，以功率均衡器表示OLA网元中的通道功率检测器和通道功率执行器。功率控制器连接各个功率均衡器并执行如步骤S501至步骤S507的功率均衡方法。
本申请实施例的第二方面提供了一种光传送网网元，包括至少一个处理器和用于与至少一个处理器通信连接的存储器；存储器存储有能够被至少一个处理器执行的指令，指令被至少一个处理器执行，以使至少一个处理器能够执行前述第一方面的光网络的功率均衡方法。
参照图13，以光传送网网元1000中的控制处理器1001和存储器1002可以通过总线连接为例。存储器1002作为一种非暂态计算机可读存储介质，可用于存储非暂态软件程序以及非暂态性计算机可执行程序。此外，存储器1002可以包括高速随机存取存储器，还可以包括非暂态存储器，例如至少一个磁盘存储器、闪存器件、或其他非暂态固态存储器件。在一些实施方式中，存储器1002可选包括相对于控制处理器1001远程设置的存储器，这些远程存储器可以通过网络连接至光传送网网元1000。上述网络的实例包括但不限于互联网、企业内部网、局域网、移动通信网及其组合。
本领域技术人员可以理解，图13中示出的装置结构并不构成对光传送网网元1000的限定，可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。
通过在网元中执行前述第一方面的功率均衡方法，能够对业务传输路径上多个功率均衡点同时给出功率均衡增益调整量，相对于按照业务传输路径走向从上游节点到下游节点逐个调整的传统功率均衡方式，本申请实施例能够大大提高功率均衡的效率，快速实现功率收敛。
本申请实施例的第三方面提供了一种计算机可读存储介质，该计算机可读存储介质存储有计算机可执行指令，该计算机可执行指令被一个或多个控制处理器执行，例如，被图13中的一个控制处理器1001执行，可使得上述一个或多个控制处理器执行上述方法实施例中的光网络的功率均衡方法，例如，执行以上描述的图1中的方法步骤S100至步骤S300、图2中的方法步骤S210至步骤S220、图3中的方法步骤S211至步骤S212、图4中的方法步骤S230至步骤S240、图5中的方法步骤S400至步骤S500、图6中的方法步骤S250至步骤S270、 图7中的方法步骤S410至步骤S430、图9中的方法步骤S501至步骤S507和图11中的方法步骤S601至步骤S607。
本申请实施例提供的光网络的功率均衡方法，当业务传输路径上的功率均衡器的出现功率异常并需要执行功率均衡时，需要为该功率均衡器计算功率均衡增益调整量，这时，考虑该功率均衡器的上游功率均衡器处同一光信号的功率偏移情况，使计算所得的功率均衡增益调整量排除上游跨段增益调整带来的影响，从而能够对业务传输路径上多个功率均衡点同时给出功率均衡增益调整量，相对于按照业务传输路径走向从上游节点到下游节点逐个调整的传统功率均衡方式，本申请实施例能够大大提高功率均衡的效率，快速实现功率收敛。
以上所描述的装置实施例仅仅是示意性的，其中作为分离部件说明的单元可以是或者也可以不是物理上分开的，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部模块来实现本实施例方案的目的。
本领域普通技术人员可以理解，上文中所公开方法中的全部或某些步骤、系统可以被实施为软件、固件、硬件及其适当的组合。某些物理组件或所有物理组件可以被实施为由处理器，如中央处理器、数字信号处理器或微处理器执行的软件，或者被实施为硬件，或者被实施为集成电路，如专用集成电路。这样的软件可以分布在计算机可读介质上，计算机可读介质可以包括计算机存储介质(或非暂时性介质)和通信介质(或暂时性介质)。如本领域普通技术人员公知的，术语计算机存储介质包括在用于存储信息(诸如计算机可读指令、数据结构、程序模块或其他数据)的任何方法或技术中实施的易失性和非易失性、可移除和不可移除介质。计算机存储介质包括但不限于RAM、ROM、EEPROM、闪存或其他存储器技术、CD-ROM、数字多功能盘(DVD)或其他光盘存储、磁盒、磁带、磁盘存储或其他磁存储装置、或者可以用于存储期望的信息并且可以被计算机访问的任何其他的介质。此外，本领域普通技术人员公知的是，通信介质通常包含计算机可读指令、数据结构、程序模块或者诸如载波或其他传输机制之类的调制数据信号中的其他数据，并且可包括任何信息递送介质。
以上是对本申请的若干实施进行了具体说明，但本申请并不局限于上述实施方式，熟悉本领域的技术人员在不违背本申请范围的前提下还可作出种种的等同变形或替换，这些等同的变形或替换均包含在本申请权利要求所限定的范围内。

Claims (10)

  1. 一种光网络的功率均衡方法，所述光网络包括设置在同一业务传输路径上的上游功率均衡器和下游功率均衡器，所述功率均衡方法包括：
    获取光信号在上游功率均衡器处的第一目标功率和第一实际功率，以及在下游功率均衡器处的第二目标功率和第二实际功率；
    根据所述第一目标功率、所述第一实际功率、所述第二目标功率和所述第二实际功率得到所述下游功率均衡器的功率均衡增益调整量；
    将所述功率均衡增益调整量发送到所述下游功率均衡器以使所述下游功率均衡器进行功率调整。
  2. 根据权利要求1所述的光网络的功率均衡方法，其中，所述第一目标功率和所述第二目标功率通过以下方式获取：
    获取光信号在所述上游功率均衡器处的第一通道信息和在所述下游功率均衡器处的第二通道信息；
    根据所述第一通道信息计算得到第一目标功率，根据所述第二通道信息计算得到第二目标功率。
  3. 根据权利要求2所述的光网络的功率均衡方法，其中，所述通道信息包括光信号在当前网元中传输的跨段衰减、传输带宽、传输速率、使用的调制码型和使用的光纤类型中的一个或多个。
  4. 根据权利要求2所述的光网络的功率均衡方法，其中，所述获取光信号在上游功率均衡器处的第一通道信息和在下游功率均衡器处的第二通道信息，包括：
    向所述上游功率均衡器和所述下游功率均衡器分别发送功率查询请求；
    接收所述上游功率均衡器根据所述功率查询请求返回的第一通道信息，接收所述下游功率均衡器根据所述功率查询请求返回的第二通道信息。
  5. 根据权利要求1或2所述的光网络的功率均衡方法，其中，所述第一实际功率和所述第二实际功率通过以下方式获取：
    将所述第一目标功率发送到所述上游功率均衡器，将所述第二目标功率发送到所述下游功率均衡器；
    接收所述上游功率均衡器返回的第一实际功率和所述下游功率均衡器返回的第二实际功率。
  6. 根据权利要求1所述的光网络的功率均衡方法，其中，得到所述功率均衡增益调整量之前，还包括：
    计算所述第二实际功率与所述第二目标功率的功率偏离值；
    确定所述功率偏离值超过预设功率偏移门限值。
  7. 根据权利要求1所述的光网络的功率均衡方法，其中，所述根据所述第一目标功率、所述第一实际功率、所述第二目标功率和所述第二实际功率得到所述下游功率均衡器的功率均衡增益调整量，包括：
    根据所述第一目标功率和所述第二目标功率得到所述光信号从所述上游功率均衡器到所述下游功率均衡器的目标功率增益；
    根据所述第一实际功率和所述第二实际功率得到所述光信号从所述上游功率均衡器到所述下游功率均衡器的实际功率增益；
    根据所述目标功率增益和所述实际功率增益得到所述功率均衡增益调整量。
  8. 根据权利要求1所述的光网络的功率均衡方法，其中，将所述功率均衡增益调整量发送到所述下游功率均衡器之后，还包括：
    发起功率查询请求；
    获取所述下游功率均衡器根据所述功率均衡增益调整量调整后的实际功率；
    根据调整后的实际功率更新所述第二实际功率。
  9. 一种光传送网网元，包括至少一个处理器和用于与所述至少一个处理器通信连接的存储器；其中，所述存储器存储有能够被所述至少一个处理器执行的指令，所述指令被所述至少一个处理器执行，以使所述至少一个处理器能够执行如权利要求1至8中任意一项所述的光网络的功率均衡方法。
  10. 一种计算机可读存储介质，其中，所述计算机可读存储介质存储有计算机可执行指令，所述计算机可执行指令用于使计算机执行如权利要求1至8中任意一项所述的光网络的功率均衡方法。
PCT/CN2021/123110 2020-10-22 2021-10-11 光网络的功率均衡方法、光传送网网元及存储介质 WO2022083470A1 (zh)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1601930A (zh) * 2003-09-23 2005-03-30 华为技术有限公司 一种动态增益均衡系统和实现动态增益均衡的方法
CN103227681A (zh) * 2013-05-17 2013-07-31 烽火通信科技股份有限公司 波分复用光传输系统通道动态光功率调整方法
CN103339877A (zh) * 2012-11-27 2013-10-02 华为技术有限公司 光信号功率调节方法和装置
CN104660303A (zh) * 2013-11-25 2015-05-27 国际商业机器公司 用于串行通信链路中的功率感知均衡的方法和装置
WO2020102011A1 (en) * 2018-11-13 2020-05-22 Ciena Corporation Automatic optical link calibration with channel holders
CN111262643A (zh) * 2018-11-30 2020-06-09 中国移动通信集团山东有限公司 一种功率调整控制方法及装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1601930A (zh) * 2003-09-23 2005-03-30 华为技术有限公司 一种动态增益均衡系统和实现动态增益均衡的方法
CN103339877A (zh) * 2012-11-27 2013-10-02 华为技术有限公司 光信号功率调节方法和装置
CN103227681A (zh) * 2013-05-17 2013-07-31 烽火通信科技股份有限公司 波分复用光传输系统通道动态光功率调整方法
CN104660303A (zh) * 2013-11-25 2015-05-27 国际商业机器公司 用于串行通信链路中的功率感知均衡的方法和装置
WO2020102011A1 (en) * 2018-11-13 2020-05-22 Ciena Corporation Automatic optical link calibration with channel holders
CN111262643A (zh) * 2018-11-30 2020-06-09 中国移动通信集团山东有限公司 一种功率调整控制方法及装置

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