WO2023216434A1

WO2023216434A1 - Method and device for topology discovery and connectivity verification in roadm system

Info

Publication number: WO2023216434A1
Application number: PCT/CN2022/109639
Authority: WO
Inventors: 刘家胜; 黄丽艳; 喻杰奎; 徐健; 范东阳; 陈文�; 陶红月; 李竞; 胡强高; 顾本艳
Original assignee: 武汉光迅科技股份有限公司
Priority date: 2022-05-11
Filing date: 2022-08-02
Publication date: 2023-11-16
Also published as: CN114785698B; CN114785698A

Abstract

The present invention relates to a method and device for topology discovery and connectivity verification in a ROADM system. The method mainly comprises: any device for topology discovery and connectivity verification in a ROADM system sends, in a broadcasting manner after being powered on, its own first device information to the other devices for topology discovery and connectivity verification in the ROADM system; the any device for topology discovery and connectivity verification in the ROADM system receives test light information sent by a certain port of a WSS, stores first device information, in the test light information, of the other devices for topology discovery and connectivity verification in the ROADM system as second device information, and superposes the first device information and the second device information and then sends same to the other devices for topology discovery and connectivity verification in the ROADM system; the any device compares its own first device information with the second device information in the received information, and if said pieces of information are consistent, link pairing succeeds, and the any device records its own first device information and the first device information in the received information in a paired manner. The present invention can reduce cost, and can automatically perform topology discovery and matching connection and verify the correctness of the connection, thereby avoiding the problem that errors are prone to occur in manual connections of conventional optical fiber links.

Description

A method and device for topology discovery and connectivity verification in a ROADM system

Technical field

The present invention relates to the field of optical communication technology, and in particular to a method and device for topology discovery and connectivity verification in a ROADM system.

Background technique

Reconfigurable optical add-drop multiplexers (ROADM) perform routing, add-drop optical signal functions in optical line systems. ROADM can switch the traffic of wavelength division multiplexing (WDM) systems at the wavelength layer. For example, ROADMs can add, drop, or route individual or multiple wavelengths used to carry data without having to convert optical signals from the optical domain to the electronic domain and back again.

ROADM can schedule services at the wavelength level of the optical network and is an important part of the intelligent all-optical network. In the implementation of ROADM, wavelength selective switches (WSS) are currently mainly used. Both the uplink and downlink functions are implemented by WSS, but WSS is relatively expensive. Using WSS for both uplink and downlink is not conducive to cost control. In addition, ROADM Boards need to be interconnected through optical fibers. The traditional way of interconnecting ROADM boards in different directions within a ROADM node is to manually connect according to a pre-planned connection diagram. However, there are many optical fiber links interconnecting ROADM boards, and there is a possibility of manual connection errors.

In view of the above situation, how to overcome the shortcomings of the existing technology and solve the problems of high cost and error-prone manual connection of optical fiber links is a difficult problem to be solved in this technical field.

Contents of the invention

In view of the above defects or improvement needs of the existing technology, the present invention provides a method and device for topology discovery and connectivity verification in a ROADM system. Wave dropping is implemented using an optical splitter to save costs; for optical fiber links between ROADM boards Connection can automatically discover the topology, connect, and verify the correctness of the connection.

The embodiments of the present invention adopt the following technical solutions:

In a first aspect, the present invention provides a method for topology discovery and connectivity verification in a ROADM system, including:

After the device for topology discovery and connectivity verification in any ROADM system is powered on, it broadcasts its first device information to the devices for topology discovery and connectivity verification in other ROADM systems; the first device information includes the identification of the source chassis. , one or more of the slot number of the source single disk and the port number of the WSS where the test optical signal is located on the source single disk;

The equipment for topology discovery and connectivity verification in any ROADM system receives the test light information sent from a certain port of the WSS, and saves the first device information of the topology discovery and connectivity verification equipment in other ROADM systems in the test light information. is the second device information, and the first device information and the second device information are superimposed and then sent to the devices for topology discovery and connectivity verification in other ROADM systems; the second device information includes the identification of the received chassis, the received One or more of the slot number of a single disk and the port number of the WSS where the test optical signal on the received single disk is located;

The device for topology discovery and connectivity verification in any ROADM system compares its first device information with the second device information in the received information. If the information is consistent, the link is paired successfully and its third device information is A piece of device information is paired and recorded with the first device information in the received information.

Furthermore, after completing link pairing, the topology discovery and connectivity verification devices in each ROADM system will compare the pairing records with the pre-entered corresponding relationships of each port to verify whether the connection is correct.

Furthermore, the distribution function of the topology discovery and connectivity verification equipment in any ROADM system in the test light transmission direction is realized through the optical splitter; the topology discovery and connectivity verification equipment in any ROADM system is used in the test light reception direction. Functionality is implemented through WSS.

In a second aspect, the present invention provides another method for topology discovery and connectivity verification in a ROADM system, including:

After the topology discovery and connectivity verification equipment in any ROADM system is powered on, it broadcasts and sends test light information with its own fixed code to the topology discovery and connectivity verification equipment in other ROADM systems;

When the topology discovery and connectivity verification equipment in any ROADM system receives the test light information sent by the topology discovery and connectivity verification equipment in other ROADM systems, it will determine the fixed code in it. If the equipment represented by the fixed code If it is the paired device preset by itself, the link pairing between the devices will be completed.

Furthermore, when the topology discovery and connectivity verification equipment in any ROADM system receives the test light information sent by the topology discovery and connectivity verification equipment in other ROADM systems, it also uses the preset port switching rules to switch ports. , and record the time point when the same fixed code is received in each port, and determine whether the corresponding port is a port that matches the device represented by the corresponding fixed code based on the received time point.

Further, when the device for topology discovery and connectivity verification in any ROADM system receives the test light information sent by the device for topology discovery and connectivity verification in other ROADM systems, it also uses the preset port switching rules to perform port switching. switch, and record the time point when the same fixed code is received on each port, and determine whether the corresponding port is a port that matches the device represented by the corresponding fixed code based on the received time point. The details include:

Preset port switching rules, and switch one port of the WSS in the topology discovery and connectivity verification device in any ROADM system every other time period;

Obtain the matching relationship between the preset port and the topology discovery and connectivity verification equipment in other ROADM systems, and convert the matching relationship between the port and the topology discovery and connectivity verification equipment in other ROADM systems into the time period and the matching relationship between the topology discovery and connectivity verification equipment in other ROADM systems. Matching relationships between devices for topology discovery and connectivity verification;

For fixed codes sent by topology discovery and connectivity verification devices in other ROADM systems, record the time point when it is received on each port, and determine whether the time period of the time point received by the corresponding port matches the preset device. If they match, a link pairing between the corresponding port and the corresponding device is established.

In a third aspect, the present invention provides a device for topology discovery and connectivity verification in a ROADM system, used to implement the methods described in the first and second aspects. The device includes a test optical transmission function module, a distribution function module, Wave loading function module, test light receiving function module, control function module, including:

The test light sending function module is used to send test light signals;

The distribution function module is used to multiplex the service optical signal and the test optical signal sent from the test optical transmission function module and then distribute them out in multiple ways;

The wavelength uploading function module is used to separate the service optical signal and the test optical signal, and switch different ports to receive the test optical signal and send it to the test optical receiving function module;

The test light receiving function module is used to receive test light signals;

The control function module is used to control the work of each module.

Further, the distribution function module includes an optical splitter, and the optical splitter is implemented in a cascade manner or in a single device.

Further, the wave uploading function module includes WSS.

Further, both the distribution function module and the wavelength uploading function module further include WDM, and the WDM of the distribution function module is connected to the optical splitter to realize the multiplexing function of the service optical signal and the test optical signal; The WDM of the wavelength uploading functional module is connected to the WSS to realize the demultiplexing function of the service optical signal and the test optical signal.

Compared with the existing technology, the beneficial effects of the present invention are: the use of optical splitters to achieve wave dropping, saving costs; for the optical fiber link connection between ROADM boards, the topology can be automatically discovered, connected, and the correctness of the connection can be verified , avoiding the error-prone problems of manual connection of traditional optical fiber links.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present invention more clearly, the drawings required to be used in the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic diagram of device module connection for topology discovery and connectivity verification in a ROADM system provided in Embodiment 1 of the present invention;

Figure 2 is a schematic diagram of the first implementation manner of the distribution function module provided in Embodiment 1 of the present invention;

Figure 3 is a schematic diagram of the second implementation manner of the distribution function module provided in Embodiment 1 of the present invention;

Figure 4 is a schematic diagram of the first implementation of the wave uploading function module provided in Embodiment 1 of the present invention;

Figure 5 is a schematic diagram of the second implementation of the wave uploading function module provided in Embodiment 1 of the present invention;

Figure 6 is a flow chart of a method for topology discovery and connectivity verification in a ROADM system provided in Embodiment 2 of the present invention;

Figure 7 is a schematic diagram of a specific scenario provided by Embodiment 2 of the present invention;

Figure 8 is a flow chart of a method for topology discovery and connectivity verification in another ROADM system provided in Embodiment 3 of the present invention;

Figure 9 is an expanded flow diagram of step 20 in Embodiment 3 of the present invention;

Figure 10 is a schematic structural diagram of a device for topology discovery and connectivity verification in a ROADM system provided in Embodiment 4 of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not intended to limit the present invention.

In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. The present invention will be described in detail below with reference to the drawings and embodiments.

Example 1:

As shown in Figure 1, Embodiment 1 of the present invention provides a device for topology discovery and connectivity verification in a ROADM system. The device includes a distribution function module 110, a wave uploading function module 120, a test optical transmission function module 130, and a test optical reception module. Function module 140 and control function module 150, wherein the test light sending function module 130 is used to send a test light signal; the distribution function module 110 is used to combine the service light signal and the test light sent from the test light sending function module 130. The signals are multiplexed and distributed in multiple ways; the uplink functional module 120 is used to separate the service optical signal and the test optical signal, and switch different ports to receive the test optical signal and send it to the test optical receiving function module 140; the The test light receiving function module 140 is used to receive test light signals; the control function module 150 is used to control the work of each module.

The distribution function module 110 of this embodiment includes an optical splitter; the wavelength uploading function module 120 includes a WSS. In addition, both the distribution function module 110 and the wave uploading function module 120 can also include WDM. The WDM of the distribution function module 110 is connected to an optical splitter to realize the multiplexing function of service optical signals and test optical signals; the wave uploading function module The 120 WDM is connected to the WSS to realize the demultiplexing function of the service optical signal and the test optical signal.

Specifically, referring to Figure 1, the distribution function module 110 of this embodiment implements the multiplexing of the test optical signal sent from the 400a direction and the service optical signal sent from the 200a direction, and combines the test optical signal sent from the 400a direction. Two parts of light are sent out from the 300a direction.

In this embodiment, the signal sent from 200a in the distribution function module 110 is a WDM signal, that is, the wavelength of each signal is different. The test optical signal sent from the direction of 400a is a signal with a different wavelength from the signal sent from 200a.

In this embodiment, the distribution function module 110 includes a splitter. The attenuation of each channel in the splitter may be the same or different. Splitter can be implemented in a cascade manner or in a single device.

In this embodiment, the signal sent from 200a and the signal sent from 400a in the distribution function module 110 can be combined using either a coupler or a wavelength division multiplexing device (WDM). . When using a coupler to combine, the distribution function module 110 is implemented as shown in Figure 2. Splitter combines the signals in the two directions and distributes them to n channels through 2:n conversion; when using WDM to combine The implementation of the distribution function module 110 is shown in Figure 3. The WDM first combines the signals in the two directions, and then the Splitter distributes the signals to n channels through 1:n conversion.

In this embodiment, the signals sent from the 300a direction, a1, a2, to an are the same, that is, the signals on each port include the test light signal sent by the test light sending function module 130 from the 400a direction. and the business optical signal sent from the 200a direction.

In this embodiment, the wavelength uploading function module 120 is implemented by WSS. The wavelength uploading function module 120 sends the service optical signal from the 200b direction and the test optical signal from the 400b direction. Realize the separation of test optical signals and service optical signals.

In this embodiment, the separation function of the test optical signal and the service optical signal in the wavelength adding function module 120 can be implemented by WSS itself or by WDM. When implemented through WSS itself, the implementation of the wave adding function module 120 is shown in Figure 4. In this case, WSS itself has a separation function; when implemented through WDM, the implementation of the wave adding function module 120 is shown in Figure 5. The signal that passes through the WSS is separated into a service optical signal and a test optical signal after passing through the WDM, and are sent out respectively.

In this embodiment, the wavelength range of the WSS of the wavelength adding function module 120 includes the wavelength of the test optical signal sent from the 400a direction and the wavelength of the service optical signal sent from the 200a direction.

In this embodiment, the WSS of the wavelength adding function module 120 continuously switches the wavelength channel of the test optical signal between b1 and bn ports, and the order of switching is not limited. It can be switched sequentially or randomly. The time that the test optical signal stays on ports b1 to bn can be the same or different.

In this embodiment, there is only one pair of optical fibers connected between each pair of ROADM single disks to realize interconnection between single disks. Each ROADM single disk is a device as described above and includes a distribution function module 110 , wave uploading function module 120, test light sending function module 130, test light receiving function module 140, and control function module 150.

Through the above equipment, this embodiment uses an optical splitter to realize the wave dropping function and save costs.

Example 2:

Based on the device for topology discovery and connectivity verification in the ROADM system provided in Embodiment 1, this Embodiment 2 provides a method for topology discovery and connectivity verification in the ROADM system, as shown in Figure 6. The method includes the following steps:

Step 100: After any device is powered on, it broadcasts its first device information to other devices. The first device information includes one or more of the identification of the source chassis, the slot number of the source single disk, and the port number of the WSS where the test optical signal on the source single disk is located.

Step 200: Any device receives the test light information sent from a certain port of the WSS, saves the first device information of other devices in the test light information as the second device information, and stores the first device information and the second device information. Send to other devices after superimposition. The second device information includes one or more of the received identification of the chassis, the received slot number of the single disk, and the received port number of the WSS where the test optical signal on the single disk is located.

Step 300: Any device compares its first device information with the second device information in the received information. If the information is consistent, the link is paired successfully, and its first device information is compared with the received second device information. The first device information in the information is paired and recorded. Through the above steps, the topology between devices in the ROADM system can be discovered.

In addition, step 400 may also be included: after completing link pairing, each device compares the pairing record with the pre-entered corresponding relationship of each port to verify whether the connection is correct. Through this step, the correctness of the link connection can be judged. In this embodiment, the distribution function of any device in the test light sending direction is implemented through the optical splitter; the uplink function of any device in the test light receiving direction is implemented through the WSS.

The above is an overview of the method of this embodiment. The method of this embodiment will be described in more detail below, taking a single disk as a device as an example.

Taking each single disk in the ROADM system as an example, the topology discovery function in this embodiment is implemented as follows: as soon as a single disk is powered on, the information sent by each service disk from the test optical transmission function module 130 includes but is not limited to the following information: Source chassis The identification + the slot number of the source single disk + the port number of the WSS where the test optical signal is located on the source single disk. The identification of the chassis only needs to be unique, which can be a name, a serial number, an IP address, etc. The order of the above information is also not limited.

The test light receiving function module 140 of a single disk receives the test light information sent from one of the WSS ports b1 to bn. Specifically, the single disk of a certain port knows it, because the test light enters the port from b1 to bn by configuring the WSS channel on the single disk.

When the received information includes the following information sent from other single disks: the identification of the source chassis + the slot number of the source single disk + the port number of the WSS where the test optical signal is located on the source single disk, save this information as: Received The identification of the chassis + the slot number of the single disk received + the port number of the WSS where the test optical signal on the received single disk is located. This information is in any order. This information is then sent out together with the information of this single disk, that is, the information sent includes but is not limited to the following information: the identification of the source chassis + the slot number of the source single disk + the location of the test optical signal on the source single disk The WSS port number + the received chassis ID + the received single disk slot number + the received WSS port number where the test optical signal on the single disk is located. This information is in any order.

When the single disk receives information next time, the identification of the source chassis of the single disk + the slot number of the source single disk + the port number of the WSS where the test optical signal is located on the source single disk will be combined with the received information. (The identification of the source chassis + the slot number of the source single disk + the port number of the WSS where the test optical signal is located on the source single disk + the identification of the received chassis + the slot number of the received single disk + the test on the received single disk The information in the WSS port number where the optical signal is located): the received chassis identification + the received single disk slot number + the received single disk test optical signal on the WSS port number where the optical signal is located information comparison, if the information is consistent , then the link is paired successfully, and the identification of the current source chassis of this single disk + the slot number of the source single disk + the port number of the WSS where the test optical signal is located on the source single disk, and the source chassis in the received information are recorded The identification + the slot number of the source single disk + the port number of the WSS where the test optical signal is located on the source single disk, pair the two information and record them.

Each single disk continuously performs the above operations to complete topology discovery. Finally, after completing the topology discovery of each single disk, it can be compared with the corresponding relationship of each port entered to realize the connectivity verification function. The entered correspondence of each port can be from up and down the network management to each single disk, or it can be entered manually according to the pre-planned correspondence.

The topology discovery in this embodiment will be described in more detail below using a specific scenario.

As shown in Figure 7, this scenario provides three devices, that is, three single disks. Among them, the top device is called E. Assume that its chassis ID is E and its slot number is 1. Currently, the WSS on this single disk The port number where the test light wavelength is located is b1, then the information sent by this single disk when powered on is E1b1. We call the device on the left below F. Assume that its chassis ID is F and its slot number is 1. The current port number of the WSS test optical wavelength on this single disk is b2. Once the single disk is powered on, it will send The information is F1b2.

Since a1 of the upper single disk E is connected to b2 of the left single disk F, and b1 of the upper single disk E is connected to a2 of the left single disk F, there is a link connection between the two, and at this time, the WSS test of the upper single disk E is The optical signal is at the b1 port, and the test optical signal of the WSS of the single disk F on the left is at the b2 port, and the two are interoperable.

When the receiving function of the single disk E above receives the information F1b2, it will translate the received information into the received information F1b2, and add it to the original sent information for transmission, that is, the subsequent information sent is E1b1F1b2.

When the single disk F on the left receives the information E1b1F1b2 from E, the current port of the single disk F on the left is represented as F1b2, and is compared with the last part of the information F1b2 in the received information E1b1F1b2. If the two are consistent, it means the pairing is successful. , in the specific implementation, you can send and receive more times to determine the matching result, such as more than 3 consecutive successful pairings and other restrictions.

Similarly, the single disk F on the left will receive the E1b1 information sent by the single disk E above, translate the received information into the received information E1b1, and add it to the original sent information for transmission, that is, the subsequent information sent. It is F1b2E1b1. When the single disk E above receives the information F1b2E1b1 sent by the single disk F, it compares the subsequent information E1b1 with the current port number. The current port number happens to be E1b1, and the two are paired successfully.

At the same time, for the single disk on the right below, assume that its current device number is G, the slot number is 1, and the port where the WSS test light is located is b1. Since single disk E and single disk F are communicating at this time, and E and G The a2 port of E is connected to the b1 port of G. For E, the information E1b1F1b2 sent at this time is sent through the distribution function. The distribution function is mainly implemented through Splitter. The information sent by each port is the same, so from E's a2 The port also sends out E1b1F1b2 information. And assuming that the test light port of G is the b1 port at this time, such information will also be received. However, G will compare the second half F1b2 of the received information E1b1F1b2 with the current test light port information G1b1 of this single disk. If the two are inconsistent, the pairing will fail.

The format of the above information is just one example, and in actual implementation, the format of the information is not limited.

To sum up, the embodiment of the present invention uses an optical splitter to realize the wave dropping function and save costs; for the optical fiber link connection between ROADM boards, topology discovery and matching connection can be automatically performed, and the correctness of the connection can be verified to avoid It eliminates the error-prone problem of manual connection of traditional optical fiber links.

Example 3:

Based on the device for topology discovery and connectivity verification in the ROADM system provided in Embodiment 1, this Embodiment 3 provides another method for topology discovery and connectivity verification in the ROADM system, as shown in Figure 8. The method includes the following steps:

Step 10: After any device is powered on, it broadcasts test light information with its own fixed code to other devices. The fixed code described in this step is a code unique to each device, and the fixed code of each device is different, so that the device sending the information can be identified through the fixed code. In addition, the broadcast of this step information is achieved through a beam splitter.

Step 20: When any device receives the test light information sent by other devices, it determines the fixed code. If the device represented by the fixed code is its own preset pairing device, the link pairing between the devices is completed. . In this step, it is necessary to first clarify that before performing topology discovery and connectivity verification, the connection relationship between devices is generally set in advance. This step uses the received fixed code to determine whether the device currently connected to itself is If it is not a device with a pre-set connection relationship, the link pairing relationship between the two will be determined, otherwise the link pairing will not be performed.

In this preferred embodiment, for step 20, when any device receives the test light information sent by other devices, it can also use the preset port switching rules to switch ports, and record the same fixed code on each port. According to the received time point, it is judged whether the corresponding port is a port that matches the device represented by the corresponding fixed code. This step is to take the pairing relationship between devices one step further and realize the pairing relationship between the device port and other devices. In addition, the port switching in this step is implemented through WSS.

Specifically, as shown in Figure 9, step 20 (when any device receives the test light information sent by other devices, determines the fixed code in it, if the device represented by the fixed code is its preset paired device , then the link pairing between devices is completed) can be expanded to the following steps in detail:

Step 21: Preset the port switching rules and switch one WSS port in the device every other time period. For example, there are ten WSS ports, and ten time periods are preset to switch the WSS ports. The first time period, which is the first minute, is used to switch to the first port of WSS, and the second time period, which is the first minute, is used to switch to the first port of WSS. Two minutes are used to switch to the second port of WSS, and so on, until the tenth time period, which is the tenth minute, is used to switch to the tenth port of WSS.

Step 22: Obtain the preset matching relationship between the port and other devices, and convert the matching relationship between the port and other devices into the matching relationship between the time period and other devices. For example, if the first port of the current device's WSS is originally set to match and connect with device A, and the second port of the current device's WSS is used to match and connect with device B, then set its own port to that of other devices. The matching relationship is converted into a matching relationship with other devices in the time period, that is, the first minute is used to match and connect with device A, the second minute is used to match and connect with device B, and so on.

Step 23: For the fixed code sent by other devices, record the time point it is received in each port, and determine whether the time period of the time point received by the corresponding port matches the preset device. If it matches, establish the corresponding port and Corresponds to link pairing between devices. For example, the information sent by device A to this device will include the fixed code of device A. If the information is received at a certain point in the first minute after this device switches the WSS port, it means that it is related to device A. The matching connection is successful and the link pairing between the first port of the current device's WSS and device A is established. However, if the information sent by device A is received in other time periods (such as the second minute) when the device switches WSS ports, then It means that the matching connection with device A is unsuccessful. The information of device A is not sent to the preset port, but to another port. The judgment of other devices and other ports is the same and will not be described again.

To sum up, the embodiment of the present invention uses an optical splitter to realize the wave dropping function and save costs; for the optical fiber link connection between ROADM boards, the topology can be automatically discovered, the connection is made, and the correctness of the connection is verified, avoiding the traditional Manual connection of optical fiber links is prone to errors.

Example 4:

On the basis of the methods and devices for topology discovery and connectivity verification in the ROADM system provided in the above-mentioned Embodiments 1 to 3, the present invention also provides a topology discovery in the ROADM system that can be used to implement the functions of the above-mentioned methods and device modules. and connectivity verification device, as shown in Figure 10, which is a schematic diagram of the device architecture of this embodiment. The device of this embodiment includes one or more processors 21 and memory 22 . Among them, a processor 21 is taken as an example in FIG. 10 .

The processor 21 and the memory 22 may be connected through a bus or other means. In FIG. 10 , the connection through a bus is taken as an example.

As a non-volatile computer-readable storage medium, the memory 22 can be used to store non-volatile software programs, non-volatile computer executable programs and modules, such as the methods and modules in Embodiments 1-3. The processor 21 executes various functional applications and data processing of the device by running non-volatile software programs, instructions and modules stored in the memory 22, that is, realizing topology discovery and connectivity in the ROADM system of Embodiments 1-3. Verification methods and module functions.

Memory 22 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some embodiments, the memory 22 optionally includes memory located remotely relative to the processor 21, and these remote memories may be connected to the processor 21 through a network. Examples of the above-mentioned networks include but are not limited to the Internet, intranets, local area networks, mobile communication networks and combinations thereof.

The program instructions/modules are stored in the memory 22. When executed by one or more processors 21, the methods and module functions of topology discovery and connectivity verification in the ROADM system in the above embodiments 1-3 are performed. For example, the above Describe the various steps shown in Figures 6, 8-9.

Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the embodiments can be completed by instructing relevant hardware through a program. The program can be stored in a computer-readable storage medium. The storage medium can include: Read memory (ReadOnlyMemory, abbreviated as: ROM), random access memory (RandomAccessMemory, abbreviated as: RAM), magnetic disk or optical disk, etc.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range. Contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

A method for topology discovery and connectivity verification in a ROADM system, which is characterized by including:

After the device for topology discovery and connectivity verification in any ROADM system is powered on, it broadcasts its first device information to the devices for topology discovery and connectivity verification in other ROADM systems; the first device information includes the identification of the source chassis. , one or more of the slot number of the source single disk and the port number of the WSS where the test optical signal is located on the source single disk;

The equipment for topology discovery and connectivity verification in any ROADM system receives the test light information sent from a certain port of the WSS, and saves the first device information of the topology discovery and connectivity verification equipment in other ROADM systems in the test light information. is the second device information, and the first device information and the second device information are superimposed and then sent to the devices for topology discovery and connectivity verification in other ROADM systems; the second device information includes the identification of the received chassis, the received One or more of the slot number of a single disk and the port number of the WSS where the test optical signal on the received single disk is located;

The device for topology discovery and connectivity verification in any ROADM system compares its first device information with the second device information in the received information. If the information is consistent, the link is paired successfully and its third device information is A piece of device information is paired and recorded with the first device information in the received information.
The method for topology discovery and connectivity verification in a ROADM system according to claim 1, characterized in that, after completing link pairing, the topology discovery and connectivity verification equipment in each ROADM system combines the pairing record with each pre-entered link. Compare the port correspondences to verify whether the connection is correct.
The method for topology discovery and connectivity verification in a ROADM system according to claim 1, characterized in that the distribution function of the topology discovery and connectivity verification equipment in any ROADM system in the test light transmission direction is realized through an optical splitter; The uplink function of the equipment for topology discovery and connectivity verification in a ROADM system in the test light receiving direction is implemented through WSS.
A method for topology discovery and connectivity verification in a ROADM system, which is characterized by including:

After the topology discovery and connectivity verification equipment in any ROADM system is powered on, it broadcasts and sends test light information with its own fixed code to the topology discovery and connectivity verification equipment in other ROADM systems;

When the topology discovery and connectivity verification equipment in any ROADM system receives the test light information sent by the topology discovery and connectivity verification equipment in other ROADM systems, it will determine the fixed code in it. If the equipment represented by the fixed code If it is the paired device preset by itself, the link pairing between the devices will be completed.
The method for topology discovery and connectivity verification in a ROADM system according to claim 4, wherein the device for topology discovery and connectivity verification in any ROADM system receives the topology discovery and connectivity verification information from other ROADM systems. When the device sends test light information, it also uses preset port switching rules to switch ports, and records the time point when the same fixed code is received in each port. Based on the received time point, it is judged whether the corresponding port is the corresponding port. The fixed encoding matches the port of the device represented.
The method for topology discovery and connectivity verification in a ROADM system according to claim 5, wherein the device for topology discovery and connectivity verification in any ROADM system receives topology discovery and connectivity information from other ROADM systems. When the verified device sends test light information, it also uses preset port switching rules to switch ports, and records the time point when the same fixed code is received in each port. Based on the received time point, it is judged whether the corresponding port is The ports that match the device represented by the corresponding fixed code specifically include:

Preset port switching rules, and switch one port of the WSS in the topology discovery and connectivity verification device in any ROADM system every other time period;

Obtain the matching relationship between the preset port and the topology discovery and connectivity verification equipment in other ROADM systems, and convert the matching relationship between the port and the topology discovery and connectivity verification equipment in other ROADM systems into the time period and the matching relationship between the topology discovery and connectivity verification equipment in other ROADM systems. Matching relationships between devices for topology discovery and connectivity verification;

For the fixed code sent by the topology discovery and connectivity verification devices in other ROADM systems, record the time point when it is received on each port, and determine whether the time period of the time point received by the corresponding port is consistent with the topology in the preset ROADM system. The devices discovered and verified for connectivity are matched. If they match, a link pairing is established between the corresponding port and the device for topology discovery and connectivity verification in the ROADM system.
A device for topology discovery and connectivity verification in a ROADM system, which is characterized by including a test optical sending function module, a distribution function module, a wave uploading function module, a testing optical receiving function module, and a control function module, wherein:

The test light sending function module is used to send test light signals;

The distribution function module is used to multiplex the service optical signal and the test optical signal sent from the test optical transmission function module and then distribute them out in multiple ways;

The wavelength uploading function module is used to separate the service optical signal and the test optical signal, and switch different ports to receive the test optical signal and send it to the test optical receiving function module;

The test light receiving function module is used to receive test light signals;

The control function module is used to control the work of each module.
The device for topology discovery and connectivity verification in a ROADM system according to claim 7, wherein the distribution function module includes an optical splitter, and the optical splitter is implemented in a cascade manner or in a single device.
The device for topology discovery and connectivity verification in a ROADM system according to claim 8, wherein the wave uploading function module includes WSS.
The device for topology discovery and connectivity verification in a ROADM system according to claim 9, characterized in that both the distribution function module and the wave uploading function module further include WDM, and the WDM of the distribution function module is the same as the WDM. The optical splitters are connected to realize the multiplexing function of the service optical signal and the test optical signal; the WDM of the wavelength uploading functional module is connected to the WSS to realize the demultiplexing function of the service optical signal and the test optical signal.