WO2012106904A1

WO2012106904A1 - Wavelength access method and device

Info

Publication number: WO2012106904A1
Application number: PCT/CN2011/077350
Authority: WO
Inventors: 邱少锋
Original assignee: 华为技术有限公司
Priority date: 2011-07-20
Filing date: 2011-07-20
Publication date: 2012-08-16
Also published as: CN102308504A; CN102308504B

Abstract

The embodiment of the present invention relates to a wavelength access method and device. The wavelength access method comprises: a wavelength access device obtains the amplified spontaneous emission (ASE) spectrum of an input port and an output port of each node device on a path to be accessed; the wavelength access device calculates the path insertion loss of the path to be accessed according to the ASE spectrum and the wavelength to be accessed; the wavelength access device compares the path insertion loss with a pre-calculated theoretic insertion loss of the path to be accessed and, if the difference between the insertion loss and the theoretic insertion loss falls within a preset difference range, inserts the wavelength to be accessed into the path to be accessed. The wavelength access method and device of the present invention are capable of achieving reliable and effective wavelength access.

Description

Wavelength access method and device

Technical field

Embodiments of the present invention relate to network management technologies, and in particular, to wavelength access methods and devices. Background technique

With the development of the transport network, network survivability has become an important part of current network design, operation and maintenance. The efficient and flexible protection means has become the wireless network of Dense Wavelength Division Multiplexing (DWDM) network. An important feature that Mesh must have.

In the prior art, network survivability is guaranteed by utilizing a pre-assigned protection path between network elements. When protection switching is required, the access wavelength is directly switched from the working path to the protection path.

In the process of implementing the present invention, the inventors have found that at least the following problems exist in the prior art: When the above method is adopted, generally, the performance of each node device on the default protection path satisfies the system index, and the switch from the working path to the protection path during protection switching For blind switching, if the protection path is faulty, it will cause network failure or degradation. Summary of the invention

An object of the embodiments of the present invention is to provide a wavelength access method and device for implementing effective and reliable wavelength access.

According to an aspect of the embodiments of the present invention, a wavelength access method is provided, including:

The wavelength access device acquires an amplified spontaneous emission ASE spectrum of an input port and an output port of each node device on the path to be accessed;

The wavelength access device calculates the to-be-accessed path according to the ASE spectrum and the wavelength to be accessed. Path path insertion insertion loss;

The said wave wavelength long-distance accessing device device prepares the path path insertion insertion loss and the pre-preemptive calculation of the said pending access path path The theoretical theory of inserting damage is relatively comparable, if the difference between the path path insertion loss and the theoretical theory insertion insertion loss is If the value is within the range of the pre-set preset difference value range, then the said access pending wave wavelength is connected to the incoming access path. Path diameter. .

According to still another aspect of the embodiment of the invention according to the present invention, there is also provided a device for providing a long-wavelength wavelength access connection device, the package comprising:

The AASSEE spectrum is obtained by acquiring the modulo module block, and is used for inputting and inputting the port port and the input of the equipment for each node of the node that is obtained on the path of the access path to be accessed. Output AASSEE media at the port port;

The path path insertion insertion loss loss meter calculates the calculation module block, and is used for calculating the calculation according to the AASSEE spectrum and the wavelength of the wave to be connected to be connected according to the description. The path path of the access path path to be accessed is inserted into the loss;

The 1100 wave wavelength is connected to the input module module, and is used for accessing the said route path insertion loss and the pre-preemptive calculation. The path path diameter of the path path is relatively compared with the insertion loss, if the path path is inserted between the loss and the damage between the path theory and the theoretical theory. The value of the difference value is within the range of the preset pre-set difference value range, and then the wavelength of the incoming wave to be accessed is connected to the wavelength to be connected. Entry path path. .

The present invention provides a method for providing a wave wavelength long-distance access method and a device for providing the device, which is due to the long wavelength of the access wave to be accessed at the time of access. Before, before, the AASSEE spectrum of the equipment input and output port port and the output port port and the port of the output port are obtained through the nodes of the access path. The wave length meter calculates 1155 to output the path loss of the path, and the root path is determined according to the calculated path path insertion loss, and the path path is judged to be Whether it is normal or not, from then, it can ensure the availability of the path of the access path to be secured, and avoid avoiding the long-term connection of the business service wave wavelength into the already-issued The path path of the fault that occurs. . Attached to the drawings

In order to explain more clearly and clearly the technical solutions of the present invention, or the prior art techniques, the following lower faces will be correct. The actual 2200 application examples or the existing technical descriptions need to be used to make the use of the attached drawings as a simple introduction, which is obvious However, it is easy to see the ground, and the following drawings in the following description are merely some examples of actual implementations of the present invention, and for the field of the present invention. The ordinary technicians of the general technical technicians come to talk about it, and if they don’t pay for the premise of creating creative labor and labor mobility, they can also These attached drawings are obtained with other drawings attached to them. .

Figure 11 is a schematic flow chart showing the flow wavelength long-range access method of the embodiment of the present invention. .

FIG. 22 is a schematic diagram showing the construction of a network network architecture with an exemplary protection reverse switching path diameter for an exemplary embodiment. .

FIG. 44 is a schematic diagram showing a network architecture architecture for an exemplary package including two or two candidate candidate routing paths. . FIG. 5 is a schematic structural diagram of a wavelength access device according to Embodiment 4 of the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Embodiment 1

FIG. 1 is a schematic flowchart diagram of a wavelength access method according to Embodiment 1 of the present invention. As shown in Figure 1, the method includes the following steps:

Step S101: The wavelength access device acquires Amplified Spontaneous Emission (ASE) of the input port and the output port of each node device on the path to be accessed.

Step S102: The wavelength access device calculates a path insertion loss of the path to be accessed according to the ASE spectrum and the wavelength to be accessed.

Step S103, the wavelength access device compares the path insertion loss with a pre-calculated theoretical insertion loss of the path to be accessed, if the difference between the path insertion loss and the theoretical insertion loss is Within the preset difference range, the to-be-accessed wavelength is accessed to the to-be-accessed path.

According to the wavelength access method of the foregoing embodiment, the wavelength access device calculates the ASE spectrum and the wavelength to be accessed according to the input port and the output port of each node device on the path to be accessed before the wavelength access path is to be accessed. The path of the path to be accessed is inserted and lost, and the path insertion loss is compared with a theoretical value of the normal state of the path processing. If the difference between the two is within a certain range, it is known that the path to be accessed is normal. At this time, the wavelength to be received is connected to the path. Therefore, the availability of the path to be accessed can be ensured, and the service wavelength is prevented from accessing the path that has failed, thereby causing a defect of the network failure. The wavelength access method of the foregoing embodiment is applied to, for example, protection switching or third-party wavelength management. The wavelength access methods applied in the two application scenarios are respectively described in the following embodiments. Embodiment 2

In this embodiment, the wavelength access method of the first embodiment is applied to the protection switching, that is, the to-be-accessed path is a protection path in the protection switching network. Figure 2 is a schematic diagram of an exemplary network architecture with a protection switching path. The above steps S101 to S103 will be described in detail below with reference to the specific example of Fig. 2 .

As shown in Figure 2, the network consists of four core nodes (R1~R4) and six amplifier nodes (Ε1~Ε6), which form two optical paths. The first core node R1, the third amplifier node E3, the fourth core node R4, the fifth amplifier node E5, the sixth amplifier node E6, and the third core node R3 form a normal working path, and the first core node R1 The first amplifier node El, the second amplifier node E2, the second core node R2, the fourth amplifier node E4, and the third core node R3 constitute a protection path. During normal operation, the optical service configuration is normally transmitted along the optical path R1 - E3 - R4 - E5 - E6 - R3. When the path fails, for example, a fault occurs between the first core node R1 and the third amplifier node E3, then normal The working path can no longer work normally. In this case, it is necessary to detect whether the protection path can work normally. If yes, the optical service configuration is switched to the protection path to transmit. In the DWDM, the optical service configuration is embodied as one of 80 wavelengths or Multiple wavelengths.

Specifically, the protection path is detected by the wavelength access device in the following manner, wherein the wavelength access device can communicate and manage with each node in the protection path, for example, the network management system of the network.

Step 1: The wavelength access device initiates initialization of the node device in the protection path. Since the first core node R1 and the third core node R3 are node devices shared with the normal working path, only the wavelength access device needs to be The first amplifier node E1, the second amplifier node E2, the second core node R2, and the fourth amplifier node E4 deliver initialization information, and each node device is configured to a default state to ensure that each device works normally;

Step 2: After the step 1, the starting node of the protection path, that is, the Reconfiguration Optical Add/drop Multiplexer (ROADM) in the first core node R1 is not configured to be connected. The service wavelength, that is, the light path is not changed at this time; Step 3: The wavelength access device sends an ASE spectrum measurement notification to the first core node R1, the first amplifier node E1, the second amplifier node E2, the second core node R2, the fourth amplifier node E4, and the third core node R3. The first core node R1, the first amplifier node El, the second amplifier node E2, the second core node R2, the fourth amplifier node E4, and the third core node R3 respectively measure the respective input ports and after receiving the ASE medium measurement notification. The ASE medium of the output port is reported to the protection path switching device.

Step 4: The wavelength access device aggregates the ASE spectra reported by each node device, and calculates the subpath insertion loss between each node device according to the ASE medium and the service wavelength to be accessed, and the insertion of each node device. damage. More specifically, FIG. 3 is a schematic diagram of an exemplary calculation of sub-path insertion loss. The first sub-path Pathl between the first core node R1 and the first amplifier node E1 is calculated in FIG. 3 as an example. As shown in FIG. 3, the ASE medium is a curve for identifying a wavelength and a power corresponding to the wavelength. In DWDM, a power value corresponding to 80 wavelengths can be obtained by the ASE medium. When calculating the insertion loss of the first sub-path Path1, calculating the ASE spectrum corresponding to the power value P1 of the wavelength to be accessed and the input port of the first amplifier node E1 in the ASE medium of the output port of the first core node R1 corresponds to The power value ΡΓ of the wavelength to be accessed, and the difference between ΡΓ and P1 is the insertion loss of the first subpath Path1. In the same manner, the insertion loss of the second sub-path p _a th2 between the first amplifier node E1 and the second amplifier node E2, and the third sub-node between the second amplifier node E2 and the second core node R2 can be calculated. Insertion loss of path Path3..., until the insertion loss of the five sub-paths included in the protection path is obtained. In a similar manner, by calculating the power difference between the input port ASE spectrum of each node device and the output port ASE medium, corresponding to the power difference of the wavelength to be accessed, the insertion loss of each node device can be obtained, that is, for the To protect the path, calculate the sub-interpolation loss of the six node devices in the protection path separately. The sum of the insertion loss of the five sub-paths and the insertion loss of the six-node device is the path insertion loss of the protection path.

Step 5: The wavelength access device compares the insertion loss calculated in the above step 4 with the theoretical insertion loss previously acquired, and determines whether the difference between the two is within a preset difference range, for example, the difference between the two. The absolute value of the value is not more than 15dB. Specifically, for example, each sub-channel is pre-stored in the wavelength access device. The theoretical insertion loss of the path can be compared with the interpolation loss of each sub-path calculated in step 4 and the theoretical insertion loss of each sub-path to obtain whether each sub-path is faulty. If the comparison is known, the insertion loss of a sub-path is obtained. If the difference between the corresponding theoretical insertion loss exceeds the preset range, it is known that the sub-path is faulty, and an alarm can be performed; if the difference between the insertion loss of all sub-paths of the protection path and the corresponding theoretical insertion loss is Within the range, it is known that the protection path is normal. In addition, the path insertion loss calculated in step 4 may be compared with the theoretical insertion loss of the protection path acquired in advance in the wavelength access device to determine whether the protection path is faulty as a whole. The theoretical insertion loss value of the protection path is calculated, for example, according to the total length of the optical fiber of the protection path and the inherent loss of the node device, and may also be a path insertion loss measured by transmitting the test wavelength in the protection path in advance. .

The theoretical insertion loss of the protection path is the sum of the inherent attenuation loss of the fiber and the inherent loss of the node device. The inherent attenuation of the fiber, for example, the attenuation loss at a wavelength of 1550 nm is 0.25 dB/km, and the inherent loss of the node device such as the inherent loss of the ROADM station is <12.5 (©111.

Step 6: If it is known in step 5 that the difference between the two is within the preset difference range, it is learned that the protection path is in a normal state, so that the wavelength to be accessed can be accessed, specifically, the first core node R1 is configured. The ROADM transfers the wavelength to be accessed to the protection path. At this point, the protection switching has been completed.

According to the wavelength access method of the foregoing embodiment, before the protection switching, the wavelength access device calculates the path of the protection path according to the ASE spectrum of the input port and the output port of each node device on the protection path and the wavelength to be accessed. Loss, and compare the path insertion loss with a theoretical value of the normal state of the path processing. If the difference between the two is within a certain range, it is known that the protection path is normal, and then the wavelength to be received is connected. Protection path. Therefore, the effectiveness of the protection switching can be ensured, and the service wavelength is prevented from being connected to the protection path that has failed, resulting in a network failure. A person skilled in the art can know that the wavelength access method of the foregoing embodiment can be applied to multiple transmission networks such as a ring network or a mesh network.

Further, in the wavelength access method of the foregoing embodiment, the method further includes:

And if the difference between the path insertion loss and the theoretical insertion loss is not within the preset difference range, the wavelength access device sends a first alarm signal. According to the wavelength access method of the above embodiment, it is possible to perform an alarm when detecting that there is a fault in the protection path, so that the network administrator can know the fault in time and perform corresponding processing.

Further, in the wavelength access method of the foregoing embodiment, the step of accessing the to-be-accessed wavelength to the to-be-accessed path includes:

The wavelength access device acquires an in-band optical signal to noise ratio of the wavelength to be accessed (IN-Optical)

Signal Noise Ratio (IN-OSNR), and comparing the path insertion loss with the IN-OSNR; if the path insertion loss is less than the IN-OSNR, accessing the to-be-accessed wavelength to the Protection path.

Specifically, in the above embodiment, by comparing the currently measured protection path insertion loss with the theoretical insertion loss of the protection path, it can be determined whether the protection path has failed. Further, in the case that the protection path is not faulty, it is determined whether the protection path is suitable for accessing the wavelength to be accessed by comparing the currently measured protection path insertion loss with the IN-OSNR of the wavelength to be accessed. . More specifically, since the wavelength resides at the start node of the protection path when the wavelength to be accessed is not yet connected, the wavelength access device moves to the start node device on the protection path, that is, the first core. The node R1 sends an IN-OSNR measurement notification, so that the first core node R1 responds to the IN-OSNR measurement notification, measures the IN-OSNR of the wavelength to be accessed, and reports it to the wavelength access device. The first core node R1 may measure the IN-OSNR of the wavelength to be accessed by using any of the preset IN-OSNR measurement methods in the prior art. The wavelength access device receives the IN-OSNR reported by the first core node R1, and compares the previously calculated path insertion loss. If the path insertion loss is smaller than the IN-OSNR, it is learned that the protection path can implement the wavelength to be accessed. High accuracy and reliability transfer.

Further, if the path insertion loss is greater than or equal to the IN-OSNR, the wavelength access device learns that the protection path cannot transmit the wavelength to be accessed with high accuracy and reliably, and the wavelength access device transmits the second alarm signal. Wherein, the second alarm signal may be the same as or different from the first alarm signal, and preferably different, the network management personnel may transmit more accurate fault information.

According to the wavelength access method of the foregoing embodiment, the protection path that has been detected to have no fault is further combined with the IN-OSNR of the wavelength to be accessed to detect whether the protection path is suitable for receiving. The access wavelength provides guarantee for accurate and reliable transmission of service wavelengths after protection switching.

Embodiment 3

In this embodiment, the wavelength access method of the first embodiment is applied to the third-party wavelength management, that is, the application scenario that the access path includes at least two candidate paths.

FIG. 4 is a schematic diagram of a network architecture including two candidate paths. The details will be described below in conjunction with the specific example of Fig. 4.

As shown in Figure 4, the network consists of four core nodes (R1~R4) and six amplifier nodes (E1~E6). The to-be-accessed wavelength accesses the network from the third core node R3, where the network includes two candidate paths, where the first candidate path is R3 ^→ E4 → R2 → E2 → E1 → R1, and the second candidate path is R3 ^→ E6 ^→ E5 ^→ R4→E3 ^→ R1„ When the wavelength to be accessed is to be connected to the network, the two candidate paths are first selected by the wavelength access device to ensure that the wavelength is connected to the available candidate path. The access wavelength is, for example, a third-party wavelength, and the wavelength access device is, for example, a network management system.

Specifically, the wavelength access device selects an access path of the wavelength to be accessed from the candidate paths in the following manner.

Step Γ The wavelength access device initiates initialization of all the node devices in the two candidate paths to ensure that the device works normally. At this time, each device is configured in a default state without changing the configuration information.

Step 2: The ROADM that is not in the third core node R3 is configured to access the wavelength to be accessed; Step 3', the wavelength access device sends an ASE spectrum measurement notification to all the node devices of the two candidate paths, so that each node The device separately measures the ASE spectrum of the input port and the output port and reports the ASE spectrum to the wavelength access device.

Step 4 ′, the wavelength access device aggregates the ASE spectra reported by the node devices, and calculates the path insertion loss of the first candidate path and the second candidate path according to the ASE media, where the insertion loss of the candidate path is used, for example. Insertion loss calculation method in the wavelength access method of the first embodiment;

Step 5: The wavelength access device compares the path insertion loss of the first candidate path and the second candidate path with respective theoretical insertion loss values to determine whether the two candidate paths can work normally, and select a working function. The candidate path serves as an access path for the wavelength to be accessed. Where the theoretical insertion loss value is, for example It is calculated based on the total length of the optical fibers of each candidate path and the inherent loss of each node device, and may be a path insertion loss measured in advance when the test wavelength is transmitted in each candidate path.

According to the path selection method of the foregoing embodiment, when the service wavelength to be accessed is connected to the network, the path insertion loss of the two candidate paths is respectively measured to determine whether the path has a fault, thereby ensuring that the wavelength to be accessed is accessed. The available path without failure increases the reliability of the network.

A person skilled in the art can know that the wavelength access method of the foregoing embodiment can be applied to multiple transmission networks such as a ring network or a mesh network.

Further, in the path selection method of the foregoing embodiment, the step of the wavelength access device selecting the access path of the wavelength to be accessed from each candidate path according to the path insertion loss of each candidate path includes: The candidate path insertion loss is compared with the pre-calculated theoretical insertion loss corresponding to the candidate path, if only the difference between the insertion loss of the candidate path and the theoretical insertion loss is within a preset difference range And accessing the to-be-accessed wavelength to the candidate path;

The wavelength access device transmits a third alarm signal if the difference between the insertion loss of each candidate path and the theoretical insertion loss is not within the preset difference range.

If the difference between the insertion loss of the at least two candidate paths and the theoretical insertion loss is within a preset difference, the wavelength access device also needs to combine the IN-OSNR of the wavelength to be accessed to meet the above conditions. The candidate path is selected to provide an access path for better transmission performance of the wavelength to be accessed. Specifically, the wavelength access device sends an IN-OSNR measurement notification to the start node of the access wavelength, that is, the third core node R3 in FIG. 4; after receiving the IN-OSNR measurement notification, the third core node R3 measures The IN-OSNR of the wavelength to be accessed is reported to the third core node R3;

The wavelength access device compares the insertion loss of the candidate path with the difference between the insertion loss and the theoretical insertion loss within a preset difference range and the IN-OSNR; and selects that the path insertion loss is less than the IN-OSNR. The candidate path accesses the to-be-accessed wavelength.

Further, if the insertion loss of two or more candidate paths is smaller than the IN-OSNR of the wavelength to be accessed, the candidate path with the largest difference between the path insertion loss and the IN-OSNR of the wavelength to be accessed is selected as the standby path. The access path into the wavelength. According to the path selection method of the foregoing embodiment, since the IN-OSNR of the wavelength to be accessed and the path insertion loss of the candidate path are also selected, the most suitable access path can be selected for the wavelength to be accessed, and the network performance is improved.

Further, in the path selection method of the foregoing embodiment, the step of selecting an access path of the wavelength to be accessed according to the difference between the insertion loss and the IN-OSNR further includes:

The wavelength access device transmits a fourth alarm signal if there is no candidate path with an insertion loss smaller than the IN-OSNR.

The fourth alarm signal may be the same as or different from the third alarm signal, preferably different, to provide network management personnel with more accurate fault information.

Embodiment 4

FIG. 5 is a schematic structural diagram of a wavelength access device according to Embodiment 4 of the present invention. As shown in FIG. 5, the wavelength access device includes:

The ASE spectrum acquisition module 41 is configured to obtain an ASE spectrum of an input port and an output port of each node device on the path to be accessed;

The path insertion loss calculation module 42 is configured to calculate a path insertion loss of the to-be-accessed path according to the ASE spectrum and the wavelength to be accessed;

The wavelength access module 43 is configured to compare the path insertion loss with a pre-calculated path insertion loss of the path to be accessed, if the difference between the path insertion loss and the theoretical insertion loss is in advance If the difference is within the range, the wavelength to be accessed is accessed to the to-be-accessed path.

The wavelength accessing process of the wavelength access device in the foregoing embodiment is the same as the wavelength access method in the foregoing embodiment, and therefore is not described herein again.

The wavelength access device calculates the path insertion loss of the path to be accessed according to the ASE spectrum of the input port and the output port of each node device on the path to be accessed and the wavelength to be accessed before the wavelength access device is to be accessed. And comparing the path insertion loss with a theoretical value of the path processing normal state, if the difference between the two is within a certain range, it is known that the to-be-accessed path is normal, and then the wavelength to be received is connected to the path. path. Therefore, the availability of the path to be accessed can be ensured, and the service wavelength is avoided. Access to a path that has failed, resulting in a defect in the network. According to the wavelength access device of the foregoing embodiment, the to-be-accessed is calculated according to the ASE spectrum of the input port and the output port of each node device on the path to be accessed and the wavelength to be accessed before the wavelength access path to be accessed is to be accessed. The path of the path is inserted into the loss, and the path insertion loss is compared with a theoretical value of the normal state of the path processing. If the difference between the two is within a certain range, it is known that the path to be accessed is normal, and then the path is normal. The wavelength to be received is connected to the path. Therefore, the availability of the path to be accessed can be ensured, and the service wavelength is prevented from accessing the path that has failed, thereby causing a defect of the network failure.

Further, in the wavelength access device of the foregoing embodiment, the to-be-accessed path is a protection path; correspondingly, the ASE spectrum acquisition module is configured to learn that a normal working path for transmitting a wavelength to be accessed fails. Then, the ASE spectrum of the input port and the output port of each node device on the protection path is obtained.

Further, in the wavelength access device of the foregoing embodiment, the wavelength access module is further configured to: if a difference between the path insertion loss and the theoretical insertion loss is not within the preset difference range, Then send the first alarm signal.

According to the protection switching processing device of the above embodiment, the alarm can be sent when the detection of the fault in the path to be accessed is detected, so that the network administrator can know the fault in time and perform corresponding processing.

Further, in the wavelength access device of the foregoing embodiment, the wavelength access module includes: a first determining unit, configured to compare the path insertion loss with a theoretical insertion loss of the protection path calculated in advance;

a second determining unit, configured to acquire an IN-OSNR of the wavelength to be accessed, and if the difference between the path insertion loss and the theoretical insertion loss is within a preset difference range, Insertion loss is compared to the IN-OSNR;

And a wavelength access unit, configured to: when the path insertion loss is less than the IN-OSNR, access the to-be-connected wavelength to the protection path.

According to the protection switching processing device of the foregoing embodiment, the protection path that has been detected to have no fault is further combined with the IN-OSNR of the wavelength to be accessed to detect whether the protection path is suitable for connection. Receiving the access wavelength provides a guarantee for accurate and reliable transmission of service wavelengths after protection switching. Further, in the wavelength access device of the foregoing embodiment, the second determining unit includes:

An IN-OSNR measurement notification sending unit, configured to send an IN-OSNR measurement notification to the initiating node device on the protection path, so that the initiating node device responds to the IN-OSNR measurement notification, and measures the The IN-OSNR of the wavelength to be accessed is reported and reported;

The IN-OSNR receiving subunit is configured to receive an IN-OSNR of the to-be-accessed wavelength reported by the starting node device.

Further, in the wavelength access device of the above embodiment, the second determining unit is further configured to send a second alarm signal if the path insertion loss is greater than or equal to the IN-OSNR.

Further, in the wavelength access device of the foregoing embodiment, the ASE spectrum acquisition module includes:

The ASE media measurement notification sending unit is configured to send an ASE spectrum measurement notification to each of the node devices, so that the node device responds to the ASE spectrum measurement notification, and measures the ASE media of the respective input port and the output port and reports the ASE media;

The ASE receiving unit is configured to receive the ASE spectrum reported by the node device.

Further, in the wavelength access device of the above embodiment, the path insertion loss calculation module includes:

a sub-path insertion loss calculation unit, configured to calculate a power difference corresponding to the to-be-accessed wavelength in an ASE spectrum between adjacent output ports and input ports between different node devices, to obtain between any two adjacent nodes Subpath insertion loss;

a node device insertion loss calculation unit, configured to calculate a power difference corresponding to the to-be-accessed wavelength in an ASE spectrum between an input port and an output port of each node device, to obtain insertion loss of each node device; And a calculating unit, configured to accumulate all the subpath insertion loss in the protection path and the insertion loss of all the node devices, to obtain the path insertion loss of the protection path.

Further, in the wavelength access device of the foregoing embodiment, the first determining module is further configured to calculate the theoretical insertion loss according to a total fiber distance between node devices in the protection path and a node device inherent loss. Further, in the wavelength access device of the foregoing embodiment, the to-be-accessed path includes at least two selected paths.

Further, in the wavelength access device of the foregoing embodiment, the wavelength access module includes: a first selecting unit, configured to insert, respectively, each candidate path insertion loss and a pre-computed theoretical insertion loss corresponding to the candidate path In comparison, if only one difference between the insertion loss of the candidate path and the theoretical insertion loss is within a preset difference, the wavelength to be accessed is accessed to the candidate path.

Further, in the wavelength access device of the foregoing embodiment, the first selecting unit is further configured to: if the difference between the insertion loss of all the candidate paths and the theoretical insertion loss is not in the preset difference Within the range of values, a third alarm signal is sent.

Further, in the wavelength access device of the foregoing embodiment, the wavelength access module further includes: a second selecting unit, configured to: if there is at least two insertion paths between the candidate path and the theoretical insertion loss If the difference is within the preset difference range, the IN-OSNR of the wavelength to be accessed is obtained; and the candidate path of the difference between the insertion loss and the theoretical insertion loss is within a preset difference range. The loss is compared with the IN-OSNR; the access path of the wavelength to be accessed is selected according to the difference between the insertion loss and the IN-OSNR, and the selected access path is accessed by the wavelength to be accessed. .

Specifically, the second selecting unit selects the candidate path with the insertion loss smaller than the IN-OSNR to access the to-be-accessed wavelength; if there are at least two insertion paths less than the candidate path of the IN-OSNR, compare a candidate path with the largest difference between the insertion loss and the IN-OSNR in the at least two candidate paths accesses the to-be-accessed wavelength; if there is no candidate path with an insertion loss smaller than the IN-OSNR, Then send a fourth alarm signal.

According to the path selection device of the foregoing embodiment, since the IN-OSNR of the wavelength to be accessed and the path insertion loss of the candidate path are also selected, the most suitable access path can be selected for the wavelength to be accessed, and the network performance is improved.

It will be understood by those skilled in the art that all or part of the steps of implementing the foregoing embodiments may be performed by hardware related to program instructions. The foregoing program may be stored in a computer readable storage medium, and when executed, the program includes The steps of the above method embodiments; Storage media include: ROM, RAM, disk or optical disk, and other media that can store program code. It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

Rights request

A wavelength access method, comprising:

The wavelength access device calculates a path insertion loss of the path to be accessed according to the ASE spectrum and the wavelength to be accessed;

The wavelength access device compares the path insertion loss with a pre-calculated theoretical insertion loss of the path to be accessed, if the difference between the path insertion loss and the theoretical insertion loss is at a preset difference Within the value range, the wavelength to be accessed is accessed to the to-be-accessed path.

The wavelength access method according to claim 1, wherein the to-be-accessed path is a protection path; correspondingly, the wavelength access device acquires an input port of each node device on the path to be accessed. And the step of outputting the ASE spectrum of the port includes: if the wavelength access device learns that the normal working path for transmitting the wavelength to be accessed fails, acquiring the ASE spectrum of the input port and the output port of each node device on the protection path .

The wavelength access method according to claim 2, wherein the step of accessing the to-be-accessed wavelength to the to-be-accessed path comprises:

The wavelength access device acquires an in-band optical signal to noise ratio IN-OSNR of the wavelength to be accessed, and compares the path insertion loss with the IN-OSNR;

If the path insertion loss is less than the IN-OSNR, the wavelength to be accessed is accessed to the protection path.

The wavelength access method according to claim 3, wherein the step of acquiring the IN-OSNR of the wavelength to be accessed comprises:

Transmitting, by the wavelength access device, an IN-OSNR measurement notification to the initiating node device on the protection path, so that the initiating node device responds to the IN-OSNR measurement notification, and measures the wavelength to be accessed. The IN-OSNR is reported to the wavelength access device.

The wavelength access method according to claim 2, wherein the wavelength access setting The steps of obtaining the amplified spontaneous emission source ASE spectrum of the input port and the output port of each of the node devices include:

The wavelength access device sends an ASE spectrum measurement notification to each of the node devices, so that the node device responds to the ASE media measurement notification, measures an ASE spectrum of each input port and an output port, and reports the ASE spectrum to the wavelength Access device.

The wavelength access method according to claim 2, wherein the step of calculating, by the wavelength access device, the path insertion loss of the protection path according to the ASE spectrum and the wavelength to be accessed comprises: The wavelength access device calculates a power difference corresponding to the to-be-accessed wavelength in an ASE spectrum between adjacent output ports and input ports between different node devices, to obtain a sub-path insertion loss between any two adjacent nodes;

The wavelength access device calculates a power difference corresponding to the to-be-accessed wavelength in an ASE spectrum between an input port and an output port of each node device, to obtain insertion loss of each node device;

The wavelength access device accumulates all the sub-path insertion loss in the protection path and the insertion loss of all the node devices to obtain the path insertion loss of the protection path.

The wavelength access method according to claim 1, wherein the to-be-accessed path includes at least two candidate paths.

The wavelength access method according to claim 7, wherein the wavelength access device compares the path insertion loss with a path loss of the pre-calculated path to be accessed, if The step of accessing the to-be-accessed wavelength to the to-be-accessed path includes: the difference between the path insertion loss and the theoretical insertion loss is within a preset difference range:

The wavelength access device compares each candidate path insertion loss with a pre-calculated theoretical insertion loss corresponding to the candidate path, if there is only one insertion loss between the candidate path and the theoretical insertion loss If the difference is within the preset difference, the wavelength to be accessed is accessed to the candidate path.

The wavelength access method according to claim 8, wherein the wavelength access device compares the path insertion loss with a pre-calculated path insertion loss of the path to be accessed, if The difference between the path insertion loss and the theoretical insertion loss is within a preset difference range, and the wave to be accessed is The step of accessing the to-be-accessed path further includes:

If the difference between the insertion loss of the at least two candidate paths and the theoretical insertion loss is within a preset difference, the wavelength access device acquires an IN-OSNR of the wavelength to be accessed;

The wavelength access device compares the insertion loss of the candidate path with the difference between the insertion loss and the theoretical insertion loss within a preset difference range and the IN-OSNR;

The wavelength access device selects an access path to be accessed according to the difference between the insertion loss and the IN-OSNR, and accesses the to-be-accessed wavelength to the selected access path.

The wavelength access method according to claim 9, wherein the step of the wavelength access device selecting an access path to be accessed according to the difference between the insertion loss and the IN-OSNR includes: :

If there is only one candidate path with an insertion loss smaller than the IN-OSNR, the candidate path is selected as the access path of the wavelength to be accessed;

If there are at least two candidate paths whose insertion loss is smaller than the IN-OSNR, compare the difference between the insertion loss and the IN-OSNR in the at least two candidate paths, and select a candidate path with the largest difference as the candidate path The access path of the wavelength to be accessed.

A wavelength access device, comprising:

The ASE spectrum acquisition module is configured to acquire an ASE medium of an input port and an output port of each node device on the path to be accessed;

a path insertion loss calculation module, configured to calculate a path insertion loss of the to-be-connected path according to the ASE spectrum and a wavelength to be accessed;

a wavelength access module, configured to compare the path insertion loss with a pre-calculated theoretical insertion loss of the path to be accessed, if the difference between the path insertion loss and the theoretical insertion loss is preset Within the difference, the wavelength to be accessed is accessed to the to-be-accessed path.

The wavelength access device according to claim 11, wherein the to-be-accessed path is a protection path; and correspondingly, the ASE spectrum acquisition module is configured to learn to transmit a normal wavelength to be accessed. If the working path fails, the input port of each node device on the protection path is obtained. The ASE spectrum of the output port.

The wavelength access device according to claim 12, wherein the wavelength access module comprises:

a first determining unit, configured to compare the path insertion loss with a theoretical insertion loss of the protection path calculated in advance;

The wavelength access device according to claim 12, wherein the second determining unit comprises:

The wavelength access device according to claim 12, wherein the ASE spectrum acquisition module comprises:

The ASE media measurement notification sending unit is configured to send an ASE media measurement notification to each of the node devices, so that the node device responds to the ASE spectrum measurement notification, and measures the ASE media of the respective input port and the output port and reports the ASE media;

The wavelength access device according to claim 12, wherein the path insertion loss calculation module comprises:

Subpath insertion loss calculation unit for calculating adjacent output ports and inputs between different node devices A power difference corresponding to the wavelength to be accessed in the ASE spectrum between the ports to obtain a subpath insertion loss between any two adjacent nodes;

The wavelength access device according to claim 11, wherein the path to be accessed includes at least two candidate paths.

The wavelength access device according to claim 17, wherein the wavelength access module comprises:

a first selecting unit, configured to compare each candidate path insertion loss with a pre-calculated theoretical insertion loss corresponding to the candidate path, if there is only one insertion loss between the candidate path and the theoretical insertion loss If the difference is within the preset difference, the wavelength to be accessed is accessed to the candidate path.

The wavelength access device according to claim 18, wherein the wavelength access module further comprises:

a second selecting unit, configured to acquire an IN-OSNR of the wavelength to be accessed if a difference between an insertion loss of the at least two candidate paths and the theoretical insertion loss is within a preset difference range Comparing the insertion loss of the candidate path with the difference between the insertion loss and the theoretical insertion loss within a preset difference range and the IN-OSNR; according to the difference between the insertion loss and the IN-OSNR The value selects an access path of the wavelength to be accessed, and accesses the wavelength to be accessed to the selected access path.

The wavelength access device according to claim 19, wherein the second selecting unit is further configured to select the candidate if there is only one candidate path with an insertion loss smaller than the IN-OSNR. a path as an access path of the wavelength to be accessed; if there are at least two candidate paths whose insertion loss is smaller than the IN-OSNR, comparing the insertion loss and the IN- in the at least two candidate paths The difference between the OSNRs and the candidate path with the largest difference is selected as the access path of the wavelength to be accessed.