CN115441982A

CN115441982A - Method and device for optimizing wavelength division multiplexing network by step parallel debugging

Info

Publication number: CN115441982A
Application number: CN202211026979.0A
Authority: CN
Inventors: 于文海; 吴学锋; 吴岩; 程勇鹏
Original assignee: Fiberhome Telecommunication Technologies Co Ltd; Wuhan Fiberhome Technical Services Co Ltd
Current assignee: Fiberhome Telecommunication Technologies Co Ltd
Priority date: 2022-08-25
Filing date: 2022-08-25
Publication date: 2022-12-06
Anticipated expiration: 2042-08-25
Also published as: CN115441982B

Abstract

The application discloses a method and a device for optimizing wavelength division multiplexing network step-by-step parallel modulation and measurement, which relate to the technical field of optical communication and comprise the following steps: generating a dependency relationship table among the OMSs in each optical multiplexing section based on the network topology relationship table; the dependency relationship table comprises the number of each OMS, the number of OLA stations and dependency table entries, and the dependency table entries comprise the OMS numbers depended by the OMS; and (4) selecting an OMS which is not dependent in each round, adding one target set to be adjusted, deleting corresponding rows in the dependency relationship table until the dependency relationship table is empty, and outputting the target set to be adjusted in each round. The method and the device for optimizing the step-by-step parallel debugging of the wavelength division multiplexing network can realize the step-by-step parallel debugging of all OMSs in the network topology and improve the leveling speed of the wavelength division multiplexing network under the MESH networking.

Description

Method and device for optimizing wavelength division multiplexing network by step parallel debugging

Technical Field

The application relates to the technical field of optical communication, in particular to a method and a device for optimizing wavelength division multiplexing networks by step parallel modulation and measurement.

Background

In the process of testing the MESH (wireless MESH network) of WDM (Wavelength Division Multiplexing), a feedback type section-by-section serial sequential adjustment is traditionally used, which not only has slow adjustment speed and long adjustment time, but also needs to adjust the services section by section from source to sink when a plurality of services are not homologous.

In the related technology, because the optical layer digital twin model is a numerical simulation mirror image of an optical network, and network adjustment change prediction can be carried out by using a digital twin model, a digital twin system corresponding to the optical layer digital twin model can be constructed for mesh networking of WDM, parameters to be modified of a plurality of network elements are synchronously issued by carrying out simulation leveling in the digital twin system, and thus the integral leveling time is saved.

However, due to errors in models such as light amplification and WSS, the prediction accuracy decreases as the number of cascaded light amplification increases. When OMS (Optical multiplexing section) in a cascade relation is adjusted simultaneously, instantaneous impact on the network is caused, and the longer the cascade is, the more serious the influence is.

Disclosure of Invention

Aiming at one of the defects in the prior art, the application aims to provide a method and a device for optimizing the step-by-step parallel debugging of the wavelength division multiplexing network, so as to solve the problem that the prediction precision is reduced along with the increase of the number of cascade optical amplifiers when the network adjustment change prediction is carried out by using a digital twin in the related art.

The first aspect of the present application provides a method for optimizing wavelength division multiplexing networks by step-by-step parallel modulation and measurement, comprising the steps of:

generating a dependency relationship table among the OMSs in each optical multiplexing section based on the network topology relationship table; the dependency relationship table comprises the number of each OMS, the number of OLA stations and a dependency table entry, and the dependency table entry comprises the OMS number depended by the OMS;

and selecting an OMS which is not dependent from the OMS in each round, adding the OMS into a target set to be adjusted, deleting corresponding rows in the dependency relationship table until the dependency relationship table is empty, and outputting the target set to be adjusted in each round.

In some embodiments, selecting an OMS that does not depend on the OMS and adding the OMS to the target set to be adjusted, and deleting a corresponding row in the dependency relationship table specifically includes:

adding an OMS with empty dependency table items in the dependency relationship table into the target set to be adjusted, deleting corresponding rows in the dependency relationship table, and deleting the OMS number in the dependency table items;

and continuously judging the OMS with all the deleted dependent table entries, adding the OMS capable of being tested in parallel into the target set to be tested, and deleting the OMS number in the dependent table entries until no OMS capable of being tested in parallel is added.

In some embodiments, the determining the OMS whose dependent entry is completely deleted specifically includes:

taking the number of the OMS in cascade as Q, and taking the sum of the maximum number of OLA stations of each OMS in cascade as P when the dependent table entry is not deleted;

when the sum of P and Q is less than or equal to a preset threshold value, judging the OMS as an OMS capable of being debugged in parallel;

and when each round is finished, recalculating the cascade number of the OMS by using the current dependency relationship table, and setting the cascade number of the OMS with the current dependency table item as empty as 1.

In some embodiments, the setting process of the preset threshold includes:

when the OSNR margin of the wavelength division multiplexing network is M, if the maximum error after simulating N optical amplifier cascades is not lower than M, the N is used as a preset threshold.

In some embodiments, before generating the dependency relationship table between the OMS, the method further includes:

and acquiring a network topology relation table, wherein the network topology relation table comprises the name of each node and the OMS number thereof, and the OMS numbers are different.

In some embodiments, continuously determining the OMS from which all the dependent table entries are deleted includes:

the OMS which depend on all the deleted table items are judged one by one, and whether the OMS which can be tested in parallel exists or not is judged;

and if the OMS exists, adding the OMS which can be tested in parallel into the target set to be tested, deleting the number of the OMS in the dependency relationship table, and judging the OMS of which the dependency table entries are all deleted one by one again.

In some embodiments, if there is no OMS capable of being debugged in parallel, the target set to be debugged of the current round is output.

A second aspect of the present application provides a device for optimizing wavelength division multiplexing networks by step-by-step parallel modulation, comprising:

the generating module is used for generating a dependency relation table among the OMSs based on the network topology relation table; the dependency relationship table comprises the number of each OMS, the number of OLA stations and a dependency table entry, and the dependency table entry comprises the OMS number depended by the OMS;

and the step-by-step calculation module is used for selecting an OMS without dependence in each turn, adding one target set to be adjusted, deleting corresponding rows in the dependence table until the dependence table is empty, and outputting the target set to be adjusted in each turn.

In some embodiments, the above optimization device further comprises:

and the acquisition module is used for acquiring a network topology relation table, wherein the network topology relation table comprises the name of each node and the OMS number thereof, and the OMS numbers are different.

In some embodiments, the step calculation module comprises:

the first calculation submodule is used for adding the OMS with the empty dependency table item in the dependency relationship table into the target set to be adjusted, deleting the corresponding row in the dependency relationship table and deleting the OMS number in the dependency table item;

and the second calculation submodule is used for continuously judging the OMS of which the dependent table entries are all deleted, adding the OMS capable of being tested in parallel into the target set to be tested, and deleting the OMS number in the dependent table entries until the OMS capable of being tested in parallel is not newly added.

The beneficial effect that technical scheme that this application provided brought includes:

according to the wavelength division multiplexing network step-by-step parallel debugging and optimizing method and device, based on the network topology relation table, a dependency relation table among optical multiplexing section OMSs can be generated, then OMSs without dependencies are selected in each turn to be added into a target set to be debugged, and corresponding rows are deleted in the dependency relation table until the dependency relation table is empty. Because each round can output a parallel target set to be regulated, and OMSs in each parallel target set to be regulated can be regulated and measured in parallel, the step-by-step parallel regulation and measurement of each OMS in the network topology can be realized, and the leveling speed of the wavelength division multiplexing network under the MESH networking is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a first flowchart of a method for optimizing wavelength division multiplexing networks by step parallel modulation and measurement according to an embodiment of the present application;

FIG. 2 is a second flowchart of a wavelength division multiplexing network step-by-step parallel modulation and measurement optimization method according to an embodiment of the present application;

fig. 3 is a topological relation diagram according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1, the present application provides an embodiment of a wavelength division multiplexing network step-by-step parallel modulation and measurement optimization method, which includes the steps of:

s1, generating a dependency relation table among optical multiplexing sections OMS based on a network topology relation table; the dependency table includes a number of each OMS, the number of OLA (Optical Line Amplifiers) stations, and a dependency table entry including the OMS number on which the OMS depends.

And S2, selecting an OMS which does not depend on each round, adding a target set to be regulated, deleting corresponding rows in the dependency relationship table until the dependency relationship table is empty, and outputting the target set to be regulated of each round.

The optimization method of the embodiment can generate a dependency relationship table among the OMS of each optical multiplexing section based on the network topology relationship table, and then selects the OMS without dependency in each turn to add into a target set to be tuned, and deletes the corresponding row in the dependency relationship table until the dependency relationship table is empty. Because each round can output a parallel target set to be regulated, and the OMSs in each target set to be regulated can be regulated and tested in parallel, the step-by-step parallel regulation and test of all the OMSs in the network topology can be realized, and the leveling speed of the wavelength division multiplexing network under the MESH networking is improved.

On the basis of the previous embodiment, in this embodiment, an OMS without dependency is selected to be added to a target set to be adjusted, and a corresponding row is deleted from a dependency relationship table, which specifically includes the following steps:

firstly, adding the OMS with the empty dependency table entry in the dependency relationship table into the target set to be adjusted, deleting the corresponding row in the dependency relationship table, and deleting the OMS number in the dependency table entries of other OMSs.

And then, continuously judging the OMS of which the dependent table entries are all deleted, adding the OMS capable of being tested in parallel into the target set to be tested, and deleting the OMS number in the dependent table entries until the OMS capable of being tested in parallel is not newly added.

Further, the method for judging the OMS with all the deleted dependent table entries specifically comprises the following steps:

first, when the number of the OMS in cascade is Q and the dependent table entry is not deleted, the sum of the maximum number of OLA stations of each OMS in cascade is P.

And when the sum of P and Q of a certain OMS is less than or equal to a preset threshold value, judging the OMS as the OMS which can be parallelly tested in the current round.

And when each round is finished, recalculating the cascade number of the OMS by using the current dependency relationship table, and setting the cascade number of the OMS with the current dependency table item as empty as 1. That is, when the OMS does not have an OMS to which it depends, Q is 1 and P is the number of OLA stations of the OMS.

On the basis of the second embodiment, in this embodiment, the setting process of the preset threshold includes:

when the OSNR margin of the wdm network is M, if the maximum error after simulating N optical amplifiers is not less than M, N satisfying the condition may be selected as the preset threshold.

The preset threshold value T is an adjustable parameter, and the smaller the configuration of T is, the slower the adjusting speed is, and the closer to single-stage sequential adjustment is; the larger the T-configuration, the faster the speed of regulation, but at the same time the security of the wdm network is reduced.

In the embodiment, the number of the steps can be adjusted by modifying the preset threshold value T according to the precision of the digital twin model and the system allowance, so that the speed and the safety can be flexibly adjusted.

Optionally, before generating the dependency relationship table between the OMS in step S1, a network topology relationship table is further obtained, where the network topology relationship table includes a name of each node and an OMS number thereof, and each OMS number is different.

On the basis of the above embodiment, in this embodiment, the continuously determining the OMS whose dependent entry is completely deleted specifically includes the following steps:

firstly, OMSs which depend on all deleted entries are judged one by one, and whether OMSs which can be debugged in parallel exist or not is judged.

And if the current target set to be adjusted exists, adding the OMS which is judged to be capable of being adjusted and measured in parallel into the current target set to be adjusted, deleting the number of the OMS in the dependency relationship table, and judging the OMS of which the dependency table items are all deleted one by one again.

In this embodiment, if there is no OMS capable of being concurrently tested, the target set to be tested in the current round is output.

In this embodiment, deleting the OMS number in the dependency relationship table specifically includes:

and deleting the corresponding row of the OMS from the current dependency relationship table, and deleting the OMS number from the dependency table entries of other OMSs.

On the basis of the above embodiment, in this embodiment, after outputting all the sets of objects to be adjusted, the method further includes:

and marking the OMS in each target set to be adjusted by one color so as to facilitate the parallel adjustment of each step.

In this embodiment, since each OMS adjustment requires spectral scanning using an OPM (Optical performance monitor), multiple waves in each OMS can be adjusted at the same time by obtaining the adjustment amount, and the speed is almost the same as that of adjusting one wave individually. Likewise, the simultaneous tuning of multiple wavelengths by the WSS device is close in time to the tuning of a single wavelength, and the simultaneous tuning does not introduce additional time consumption.

When the digital twin auxiliary prediction method is adopted for parallel acceleration and adjustment, the following constraints are satisfied: each service is adjusted from source to destination sequentially; each OMS is adjusted only once; OMS which are judged not to interfere with each other adopt parallel regulation.

As shown in fig. 2, the wavelength division multiplexing network step-by-step parallel modulation and measurement optimization method of the present embodiment specifically includes:

A1. acquiring a network topology relation table, wherein the network topology relation table comprises the name of each node and input and output OMS numbers of the nodes;

A2. generating a dependency relation table among the OMSs based on the network topology relation table; the dependency relationship table comprises the number of each OMS, the number of included OLA stations and a dependency table entry, and the dependency table entry comprises the OMS number depended by the OMS;

A3. adding an OMS with empty dependency table items in the dependency relationship table into a current target set to be adjusted, deleting corresponding rows in the dependency relationship table, and deleting the OMS number in the dependency table items;

A4. and judging the OMSs which depend on all the deleted table entries one by one, judging whether a newly added OMS which can be tested in parallel exists, if so, turning to A5, otherwise, turning to A7.

A5. Adding OMS capable of being tested in parallel into a current target set to be tested, and deleting the number of the OMS in the dependency relationship table;

A6. judging whether an OMS with empty dependency table items exists in the current dependency relationship table, if so, turning to A4; otherwise, go to A7.

A7. Outputting a current target set to be adjusted;

A8. judging whether the dependency relationship table is empty, if so, ending; otherwise, go to A9.

A9. And recalculating the cascade number of the OMS by using the current dependency relationship table, and turning to A3 by using the cascade number of the OMS with the current dependency table item as empty as 1.

As for the MESH network shown in fig. 3, taking the requirement of simultaneously debugging and testing 4 services as an example, the node paths of the 4 services are respectively: 1-4-5-8;1-4-3-5-8;2-4-5-8;1-6-7-5-8. Wherein, the preset threshold value T is set to 10.

First, the most primitive dependency table is generated according to the network topology table shown in table 1 below, as shown in table 2 below.

TABLE 1

Node point	IN	OUT
			1		a、g
2		b
			3	c	e
4	a、b	c、d
			5	d、e、i	f
6	g	h
			7	h	i
8	f

TABLE 2

OMS	#OLA	Dependency table entry
			a	3
b	4
			c	3	a、b
d	6	a、b
			e	3	c
f	2	d、e、i
			g	3
h	2	g
			i	3	h

Then, scanning the dependency relationship table, finding that the OMS without the dependency table entry is a, b, and g, that is, Q of a, b, and g is 1, respectively judging a, b, and g one by one, and finding that the sum of P and Q of the three is less than 10, so that the measurement can be performed simultaneously, that is, the current set of targets to be adjusted is: { a, b, g }.

All the a, b and g in the dependency relationship table are marked and deleted, and at this time, all the dependency table entries of the three OMS of c, d and h are marked and deleted, so at this time, it is necessary to determine c, d and h one by one, and whether parallel debugging is possible or not is determined, as shown in table 3 below.

TABLE 3

Wherein, for c, the number of OLA stations is 3, and the number of cascade is 2. When the dependency table entry is not deleted, c depends on two sections of a and b, the number of the OLA stations of a is 3, the number of the OLA stations of b is 4, the number of the OLA stations 4 is selected as the maximum number of the OLA stations of the cascade, namely { a, b } set length, 4+3+2< -T can be obtained, so c can be concurrently measured, c is marked as synchronously adjustable, and the c needs to be deleted from the dependency relationship table.

As above, for d, the number of OLA stations is 6 and the number of cascades is 2. When d is not deleted, the dependent table item depends on a and b, so that 4+6+2>T can be obtained, d can be judged to be not concurrently debugged, and the d is marked as being undeletable in the current round; for h, the dependency is g, and 3+2 Ap T is judged in the same way, and the constraint of the preset threshold value is met, and the adjustment can be performed in parallel. Namely, the current set of objects to be adjusted in the round is as follows: { a, b → c; g → h }.

Continuing the current round of judgment, and deleting c and h from the dependency relationship table, as shown in the following table 4, finding that the two OMSs (operation, maintenance, and maintenance) of e and i have no dependency table constraint. For e, the number of OLA stations is 3, the cascade number is 3, and 4+3+ T can be obtained, so that e can not be concurrently detected; for i, the number of OLA stations is 3, the cascade number is 3, and 3+2+ 3>t, so that i cannot be concurrently tested, that is, an OMS capable of being concurrently tested is not newly added, the first round of calculation is finished, and a first round of concurrent target set to be regulated is output as follows: { a, b → c; g → h }.

TABLE 4

Subsequently, all the marks are cleared, and the dependency relationship judgment is performed on the remaining OMS again, that is, the cascade number of each OMS is recalculated by using the current dependency relationship table, and the cascade number of the OMS with the current dependency table entry being empty is 1, as shown in table 5 below, at this time, d, e, and i have no dependency table entry, and the cascade number is 1.

TABLE 5

D, e and i are judged one by one respectively, namely 6+1 yarn < -T, 3+1 yarn < -T and 3+1 yarn < -T, the judgment three can be simultaneously tested, and the current targets to be regulated are integrated as follows: { d, e, i }.

As shown in table 6 below, after the marks delete d, e, and i, the dependent entry of f is also null, and according to the determination principle, the number of OLA stations of { d, e, i } is represented by 6 at the maximum, so that 6+ 2= t, and f is determined to be synchronously adjustable. And f, deleting the dependency relationship table to be empty, and finishing the second round of calculation. Outputting a set of objects to be adjusted in parallel in the second round as follows: { d, e, i → f }.

TABLE 6

Therefore, the final tuning of this embodiment can be divided into two steps, and optionally, the stations of the first round of synchronous tuning stations can be marked with red color, and the stations of the second round of synchronous tuning stations can be marked with blue color.

The application also provides an embodiment of the wavelength division multiplexing network step-by-step parallel debugging and testing optimization device, which comprises a generation module and a step-by-step calculation module.

The generating module is used for generating a dependency relationship table among the OMSs based on the network topology relationship table; the dependency relationship table includes a number of each OMS, the number of OLA stations, and a dependency entry, where the dependency entry includes an OMS number on which the OMS depends.

The step-by-step calculation module is used for selecting an OMS which is not dependent in each turn, adding one target set to be adjusted, deleting corresponding rows in the dependency relationship table until the dependency relationship table is empty, and outputting the target set to be adjusted in each turn.

Further, the optimization device further comprises an acquisition module. The acquisition module is used for acquiring a network topology relation table, the network topology relation table comprises the name of each node and the OMS number of each node, and the OMS numbers are different.

On the basis of the foregoing embodiment, in this embodiment, the optimization apparatus further includes a marking module, where the marking module is configured to mark the OMS in each parallel target set to be adjusted in a step-by-step order. Alternatively, the OMS of each round of the target set to be tuned may be marked with one color, that is, the OMS of one parallel target set to be tuned is marked with the same color.

Further, the step calculation module includes a first calculation submodule and a second calculation submodule.

The first calculation submodule is used for adding the OMS with the empty dependency table item in the dependency relationship table into the target set to be adjusted, deleting the corresponding row in the dependency relationship table, and deleting the OMS number in the dependency table item.

And the second calculation submodule is used for continuously judging the OMS of which the dependent table entries are all deleted, adding the OMS capable of being parallelly debugged into the target set to be debugged, and deleting the OMS number in the dependent table entries until the OMS capable of being parallelly debugged is not newly added.

The wavelength division multiplexing network step-by-step parallel debugging and testing optimization device is suitable for the optimization methods, and outputs each round of parallel target sets to be debugged through step-by-step calculation, wherein OMSs in each target set to be debugged can be debugged in parallel to realize step-by-step parallel debugging and testing of each OMS in a network topology, and the leveling speed of the wavelength division multiplexing network under an MESH networking is improved; in addition, the speed and safety can be flexibly adjusted by modifying the preset threshold value T to adjust the step number.

The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements are also considered to be within the scope of the present invention. Those not described in detail in this specification are within the skill of the art.

Claims

1. A wavelength division multiplexing network step-by-step parallel debugging and testing optimization method is characterized by comprising the following steps:

generating a dependency relation table between the OMSs in each optical multiplexing section based on the network topology relation table; the dependency relationship table comprises the number of each OMS, the number of OLA stations and dependency table entries, and the dependency table entries comprise the OMS numbers depended on by the OMS;

2. The method for optimizing wavelength division multiplexing network by step and parallel debugging according to claim 1, wherein the step of selecting OMS which is not dependent therefrom to be added to the target set to be debugged and deleting corresponding rows in the dependency relationship table comprises:

3. The wavelength division multiplexing network step-by-step parallel debugging optimization method of claim 2, wherein the judgment of the OMS which depends on the deletion of all table entries specifically comprises:

when each round is finished, recalculating the cascade number of the OMS by using the current dependency relationship table, and setting the cascade number of the OMS with the current dependency table item as empty as 1.

4. The WDM network step-by-step parallel modulation and test optimization method according to claim 3, wherein the setting of the preset threshold comprises:

when the OSNR margin of the wdm network is M, if the maximum error after simulating N optical amplifiers is not less than M, the N is used as a preset threshold.

5. The wavelength division multiplexing network step-by-step parallel modulation and measurement optimization method of claim 1, wherein before generating the dependency relationship table between the OMS, the method further comprises:

6. The wavelength division multiplexing network step-by-step parallel debugging optimization method according to claim 2, wherein continuously judging the OMS whose dependent table entry is completely deleted specifically comprises:

the OMS which depend on all the deleted table items are judged one by one, and whether OMS which can be tested in parallel exist or not is judged;

if yes, adding the OMS capable of being tested in parallel into the target set to be tested, deleting the number of the OMS in the dependency relationship table, and judging the OMS with all the dependency table items deleted one by one again.

7. The wavelength division multiplexing network step-by-step parallel modulation and measurement optimization method of claim 6, wherein: and if the OMS capable of being tested in parallel does not exist, outputting the target set to be regulated of the current round.

8. A wavelength division multiplexing network step-by-step parallel debugging optimization device is characterized by comprising:

the generating module is used for generating a dependency relation table among the OMSs based on the network topology relation table; the dependency relationship table comprises the number of each OMS, the number of OLA stations and dependency table entries, and the dependency table entries comprise the OMS numbers depended on by the OMS;

9. The wdm network step-by-step parallel modulation test optimization apparatus of claim 8, wherein said optimization apparatus further comprises:

the network topology management system comprises an acquisition module, a management information system (OMS) module and a management information system (OMS) module, wherein the acquisition module is used for acquiring a network topology relation table, the network topology relation table comprises the name of each node and the OMS number of the node, and the OMS numbers are different.

10. The wdm network step-by-step parallel modulation test optimization apparatus of claim 8, wherein said step-by-step computation module comprises: