CN108650021B

CN108650021B - Automatic dynamic rerouting testing method and system based on ASON

Info

Publication number: CN108650021B
Application number: CN201810453536.7A
Authority: CN
Inventors: 方思雨; 王苏; 王立波; 梁菊英; 王燕
Original assignee: Fiberhome Telecommunication Technologies Co Ltd
Current assignee: Fiberhome Telecommunication Technologies Co Ltd
Priority date: 2018-05-14
Filing date: 2018-05-14
Publication date: 2020-05-05
Anticipated expiration: 2038-05-14
Also published as: CN108650021A

Abstract

An automatic testing method and system for dynamic rerouting based on ASON relates to the field of automatic testing, and the method comprises the following steps: s1, deploying an optical switch between any two adjacent network elements in a network topology, setting a controller to control the optical switch, a network manager and an error code analyzer for monitoring services, and initializing configuration of the optical switch; s2, automatically generating a breakpoint in the next step of testing and an expected route set corresponding to the breakpoint through the current route read by the network manager by the controller, and controlling the breakpoint to generate route switching by the controller through the optical switch; s3, after the route switching is successful, the controller selects at least one optimal expected route in the expected route set for comparing with the switched route; s4, repeating the steps S2 and S3 until the test is completed. The invention dynamically generates the test steps according to the current test condition, realizes the automatic test of the dynamic route, avoids various defects caused by manual test and improves the accuracy of the test result.

Description

Automatic dynamic rerouting testing method and system based on ASON

Technical Field

The invention relates to the field of automatic testing, in particular to an automatic testing method and system for dynamic rerouting based on ASON.

Background

The concept of ason (automatic Switched Optical network) is proposed in 3 months in 2000 by international telecommunications union, and it is basically assumed that a control plane is introduced into an Optical transport network to implement on-demand allocation of network resources so as to implement intellectualization of an Optical network. The future optical transport network can be developed into a network for providing connection to any place and any user, becomes a network consisting of thousands of switching contacts and tens of millions of terminals, and is an intelligent fully automatic switching optical network.

The ASON is an automatic switching transport Network based on SDH (Synchronous Digital Hierarchy) and optical transport Network (optical transport Network), which uses a control plane to complete configuration and connection management, and an optical transport Network with intelligence formed by optical transport systems such as SDH and OTN, which use optical fibers as physical transport media. The functions of the system can be divided into a transmission plane, a control plane and a management plane, and the three planes are relatively independent and work in coordination with each other.

In order to realize the communication of services in the ASON control plane, a route can be constructed between terminals, and a communication path, a route construction route strategy, a rerouting strategy and a protection type of the services can be specified through the configuration of the route. Wherein the protection types include: dynamic rerouting, permanent 1+1, restorative 1+1, etc. If the protection type is dynamic rerouting, when the current main route fails, the ASON automatically calculates and establishes a new main route; if the protection type is permanent 1+1, the original host terminal always has two routes, the standby route is directly changed into a new main route when the main route fails, and simultaneously the ASON can automatically calculate and establish a new standby route; if the protection type is recovery 1+1, two routes, namely a main route and a standby route, exist during first-time establishment, the main route fails, the standby route becomes a new main route, after the new main route fails again, the ASON can automatically calculate and establish a new main route, and after all the subsequent new routes are the main route failures, the ASON automatically calculates and establishes the new main routes.

At present, the ASON dynamic rerouting test mainly adopts a manual test method, a line fault is simulated in a manual fiber breaking mode, circuit switching is triggered, switching time and circuit routing need to be monitored in the test, and testers need to manually read, record and judge the switching time and the circuit routing of an instrument, so that the accuracy of a test result is judged. However, the manual test method has a slow fiber breaking speed and poor flexibility, and the uniformity and accuracy of the result are poor due to the mode of manually obtaining, recording and judging the test result. Especially in the ASON dynamic rerouting test, the test flow has strong flexibility, the whole test flow is unknown before the test is started, and the test flow needs to be estimated manually according to the current route. However, the requirement of the human estimation on the testing personnel is high, and the personal estimation preference also ensures that the testing accuracy is not guaranteed.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide an automatic testing method and a system for dynamic rerouting based on ASON, which dynamically generate testing steps according to the current testing condition, realize automatic testing of dynamic rerouting, avoid various defects caused by manual testing and improve the accuracy of testing results.

In order to achieve the above purpose, the invention adopts an automatic testing method for dynamic rerouting based on ASON, which comprises the following steps:

s1, deploying an optical switch between any two adjacent network elements in a network topology, setting a controller to control the optical switch, a network manager and an error code analyzer for monitoring services, and initializing all configuration;

s2, automatically generating a breakpoint in the next step of testing and an expected route set corresponding to the breakpoint through the current route read by the network manager by the controller, and controlling the breakpoint to generate route switching by the controller through the optical switch;

s3, after the route switching is successful, the controller selects at least one optimal expected route in the expected route set for comparing with the switched route;

s4, repeating the steps S2 and S3 until the test is finished; wherein the content of the first and second substances,

in step S1, the configuration initialization obtains basic information of the network topology, and defines at least one channel in each optical switch as a breakpoint, where the initial setting of the breakpoint is a connected state.

On the basis of the above technical solution, in step S2, the controller first controls the network manager to configure an initial working route, and the network manager assigns an ID or a circuit name to the initial working route and returns the ID or the circuit name to the controller for storage; and the controller controls the network manager to obtain the current route through the ID or the circuit name of the initial working route.

Based on the above technical solution, in step S2, the controller automatically generates and tests a breakpoint in the next step on the current route, and the expected route set corresponding to the breakpoint is all possible routes under the breakpoint.

On the basis of the above technical solution, in the step S2, the step of automatically generating a breakpoint in the next step of the test by the controller specifically includes: and the control machine analyzes all possible breakpoints on the current route, generates breakpoints through a random algorithm, and takes the generated breakpoints as breakpoints controlled in the next test.

On the basis of the above technical solution, in step S3, the specific way of determining the success of the route switching is: and the control machine judges whether the service is normal or not through the service on-off of the error code analyzer, the normal service indicates that the route switching is successful, and when the route switching is successful, the error code analyzer records the service switching time.

On the basis of the above technical solution, in step S3, the switched route is the best expected route selected by the controller, or the switched route belongs to one of the best expected routes selected by the controller; and when the switched route is not or does not belong to the optimal expected route, controlling a controller to report an error.

Based on the above technical solution, in the step S3, the optimal route is a minimum node route or a minimum cost route.

Based on the above technical solution, in step S4, when the expected route set is empty, the test is completed, and the control machine analyzes the test result and generates a test report through a uniform format.

The invention also provides an automatic test system for dynamic rerouting based on ASON, which comprises:

the optical switches are at least one in number, are arranged between any two adjacent network elements in the network topology, and are used for controlling the on-off of single fibers, double fibers or multiple fibers and simulating the fault condition in a circuit;

the error code analyzer is connected with the network element and used for judging whether the monitored service is normal or not and monitoring the route switching time;

the network manager is used for configuring the initial working route and the read current route;

the controller is connected with the optical switch, the error code analyzer and the network management; the controller is used for automatically generating a breakpoint in the next step and an expected route set corresponding to the breakpoint according to the current route; and the route switching device is also used for selecting at least one optimal expected route from the expected route set and comparing the optimal expected route with the route switched every time.

The invention has the beneficial effects that:

1. the control machine controls the optical switch to simulate the line fault condition, controls the service automatically monitored by the error code analyzer, records the route switching time, and controls the network management to realize automatic configuration and automatic reading of the route information, thereby realizing automatic execution and monitoring of the testing steps and avoiding various defects caused by manual testing. The automatic testing method can realize a large amount of repetitive tests and pressure tests of pressure, save the labor cost of the test and improve the testing efficiency and the accidental problem discovery rate.

2. The control machine can automatically generate the breakpoint in the next step and the expected route set corresponding to the breakpoint according to the current route, so as to realize the dynamic generation function of the test step. And the control machine selects at least one optimal expected route from the expected route set, realizes dynamic tracking judgment of a test result, and provides a route test standard for dynamic rerouting test, thereby improving the test accuracy.

3. The control machine can analyze the test result and output the test report by adopting the unified template, thereby reducing the result recording and analyzing time, avoiding the problem of difference recorded by different personnel and improving the uniformity and accuracy of the test result.

4. Optical switches are deployed between any two adjacent network elements in a network topology, one optical switch has at least one channel, and the at least one channel can be defined as a breakpoint. The on-off control of single fiber, double fiber or multiple fibers in the circuit is realized through the on-off of the optical switch, so that the fault condition in the actual circuit is simulated, the conditions of low manual fiber breaking speed and poor flexibility are avoided, the fiber breaking speed is increased, and the fiber breaking flexibility is improved.

Drawings

FIG. 1 is a flowchart illustrating a method for automatically testing a dynamic rerouting based on an ASON according to a first embodiment of the present invention;

FIG. 2 is a flowchart illustrating the steps of a third embodiment of the present invention;

fig. 3 is a schematic diagram of an ASON-based dynamic rerouting automatic test system according to the present invention.

Reference numerals:

the system comprises an optical switch 1, an error code analyzer 2, a network management device 3 and a control machine 4.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

The first embodiment:

as shown in fig. 1, a first embodiment of the present invention is an automated testing method for dynamic rerouting based on ASON, which includes the steps of:

s1, deploying an optical switch between any two adjacent network elements in a network topology, configuring an error code analyzer for monitoring services in the network topology, setting a network manager for allocating an ID or a circuit name to an initial working route, and also setting a controller for respectively connecting the optical switch, the error code analyzer and the network manager, and realizing the initialization of all configurations.

Specifically, at least one channel exists in one optical switch, and the at least one channel can be defined as a breakpoint bpi, where i is a serial number of the breakpoint, and the initial setting of the breakpoint is a connected state (i.e., the optical switch interface is set to on). When the breakpoint is disconnected, the optical switch corresponding to the breakpoint is set to an off state (i.e., the optical switch interface is set to off). The number of the break points in the actual environment can be correspondingly deployed according to the actual physical environment, and a corresponding break point-optical switch corresponding relation configuration file, a routing cost configuration file and a whole network routing path configuration file are configured.

Basic information is obtained through configuration initialization, and the basic information comprises error code analyzer information, optical switch information, network management information, user-defined information and the like. And then the control machine realizes the connection of the error code analyzer through the information of the error code analyzer, and after the connection is finished, the control machine can realize the control of the error code analyzer. The controller is respectively and automatically connected with each optical switch through the information of the optical switches, and realizes the on-off control of single fiber, double fiber or multiple fibers in the circuit through the on-off of the optical switches, thereby simulating the fault condition in the actual circuit. The controller realizes the initialization connection of the network management through the network management information, and can realize the control of the network management when the connection of the network management is finished.

S2, the controller reads the current route through the network manager, automatically generates a breakpoint in the next step of testing and an expected route set corresponding to the breakpoint according to the current route, and controls the breakpoint through the optical switch to generate route switching.

And S3, after the route switching is successful, the controller selects at least one optimal expected route in the expected route set for comparing with the switched route.

The switched route is the best expected route selected by the controller; or the switched route belongs to one of the best expected routes selected by the controller; there is no problem with the route switching at this time. When the switched route is not the best expected route; or, when the switched route does not belong to one of the best expected routes, it indicates that the route switching has a problem, and an error can be reported through the control machine.

S4, repeating the steps S2 and S3 until the test is completed.

Second embodiment:

in the first embodiment of this embodiment, step S2 is performed on the premise that: the controller controls the network management to configure the initial working route, the network management allocates ID or circuit name to the initial working route, and returns the allocated ID or circuit name to the controller for storage. And then controlling the service configuration of the error code analyzer by the control machine, wherein the configured service type is obtained from the user-defined information of the basic information. And after the service configuration of the error code analyzer is completed, monitoring the on-off of the service of the error code analyzer, wherein the on-off of the service of the error code analyzer represents normal service, and the off-off of the service of the error code analyzer represents abnormal service. And if the error code analyzer is abnormal, deleting the configured route and ending the test. Only in case of normal service, the automatic test is started.

The third embodiment:

on the basis of the second embodiment, in this embodiment, as shown in fig. 2, step S2 specifically includes:

s201, the controller reads the current route through the network manager, and the current route can be obtained through the ID or the circuit name of the initial working route. Wherein the route read for the first time is the initial working route of the test.

S202, the controller automatically generates a breakpoint of the next step in the test and an expected route set corresponding to the breakpoint according to the current route. Specifically, the control machine analyzes all possible breakpoints on the current route according to the current route, then generates a determined breakpoint through a random algorithm, wherein the generated breakpoint must be on the current route, and the breakpoint serves as a breakpoint for test control in the next step. And generating an expected route set corresponding to the breakpoint according to all possible routes under the breakpoint.

S203, the controller judges whether the expected route set is empty, if yes, the S205 is entered; if not, the process proceeds to S204.

And S204, the controller acquires a break point, performs fiber breaking control operation through the corresponding optical switch, generates route switching, and enters S3.

S205, showing that no possible route exists in the topological network, and directly ending the test. The partial route may also be restored later and then testing continued.

The fourth embodiment:

on the basis of the previous embodiment, after each time of the route switching is successful, the controller selects at least one optimal expected route in the expected route set.

The control machine monitors the on-off of the service through the error code analyzer to judge whether the route switching is successful. When the service of the error code analyzer is passed, the service is normal, which indicates that the route switching is successful. When the service of the error code analyzer is disconnected, the representative service is abnormal, at this time, the error code analyzer can wait for a period of time, if the service is still disconnected after waiting, the representative service is abnormal, which indicates that the route switching fails, and records the result of the error code analyzer as a service error (service error); if the error code analyzer waits for a period of time and the service is passed, the service is normal, which indicates that the route switching is successful. The waiting time of the error code analyzer is set by the control machine according to requirements, and the longest waiting time is generally set to be not more than 30 seconds.

When the route switching is successful, the control machine reads the switching time of the error code analyzer and records the switching time. Then, the controller reads the current route through the network manager, the current route is still obtained through the ID or circuit name of the initial working route, and the network manager returns the read current route to the controller for recording.

Then, the controller selects at least one best expected route in the expected route set according to the best route decision criteria set when establishing routes on the network manager and combining the current route, and then goes to step S2. The decision criterion of the optimal route is preset according to the custom information in the basic information, generally speaking, the optimal route is the minimum node route or the minimum link cost route, and certainly, the optimal route may also be a route obtained by other decision methods. There are equivalence situations in the best expected route obtained by the judgment, so that more than one best expected route is possible.

Fifth embodiment:

on the basis of the first to fourth embodiments, when the automatic test is completed, the control machine analyzes the test result, in the test result, the routing standard test result range of each step is automatically predicted and generated by the control machine, and the standard result of the error code analyzer can be obtained according to the basic information. After the test result is analyzed, the controller generates a test report with a uniform format according to the test result. The test report records the operation steps of each breakpoint operation, the standard result (route switching time) of the error code analyzer, the actual result (actual route switching time) of the error code analyzer, the predicted optimal route, the actual route read by the network manager, and the like, and can perform unified analysis and statistics on the test result on the test passing rate.

After the test report is output, the control machine initializes all the optical switches, sets all the optical switches to be in an on state, waits for a period of time, and deletes the circuit through the initial working route id or the circuit name after the circuit is recovered to be in a normal state, and the whole test is finished.

Sixth embodiment:

as shown in fig. 3, the ASON-based dynamic rerouting automatic test system includes an optical switch 1, an error code analyzer 2, a network manager 3 and a controller 4, wherein the controller 4 is connected to and controls the optical switch 1, the error code analyzer 2 and the network manager 3 respectively.

The number of the optical switches 1 is at least one, in this embodiment, each optical switch 1 is disposed between any two adjacent network elements in a network topology, each optical switch 1 has at least one channel, at least one channel is defined as a breakpoint, and the optical switch 1 is configured to implement on-off control of a single fiber, a double fiber, or multiple fibers by on-off of the breakpoint, so as to simulate a fault condition in an actual line.

The error code analyzer 2 is connected to the network element, and is configured to monitor whether the service is normal and further determine whether the route switching is successful, and the error code analyzer 2 is further configured to monitor a switching time when the route switching is successful.

The network manager 3 is used for configuring the initial working route and distributing an ID or a circuit name to the initial working route; and is also used for reading the current route and returning the current route to the control machine 4.

The control machine 4 is used for automatically generating a breakpoint in the next step of testing according to the current route, generating an expected route set corresponding to the breakpoint, and selecting at least one optimal expected route from the expected route set. After the test is finished, the control machine 4 is further configured to analyze the test result and generate a test report with a unified format according to the test result.

The control machine 4 is configured to analyze all possible breakpoints on the current route, and then generate a certain breakpoint through a random algorithm, where the generated breakpoint must be on the current route. The controller 3 generates an expected route set corresponding to the breakpoint according to all possible routes under the breakpoint. The criterion for the controller 4 to decide the optimal route is preset, and the optimal route may be set as the minimum node route or the minimum link cost route.

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 such 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. An automatic test method for dynamic rerouting based on ASON is characterized by comprising the following steps:

2. The ASON-based dynamic rerouting automation test method according to claim 1, characterized in that: in step S2, the controller first controls the network manager to configure an initial working route, and the network manager assigns an ID or a circuit name to the initial working route and returns the ID or the circuit name to the controller for storage; and the controller controls the network manager to obtain the current route through the ID or the circuit name of the initial working route.

3. The ASON-based dynamic rerouting automation test method according to claim 2, characterized in that: in step S2, the controller automatically generates and tests the breakpoint in the next step on the current route, and the expected route set corresponding to the breakpoint is all the possible routes under the breakpoint.

4. The ASON-based dynamic rerouting automatic testing method of claim 3, wherein in step S2, the step of automatically generating and testing the breakpoint in the next step includes: and the control machine analyzes all possible breakpoints on the current route, generates breakpoints through a random algorithm, and takes the generated breakpoints as breakpoints controlled in the next test.

5. The ASON-based dynamic rerouting automation test method according to claim 1, wherein in step S3, the specific determination manner of the success of route switching is: and the control machine judges whether the service is normal or not through the service on-off of the error code analyzer, the normal service indicates that the route switching is successful, and when the route switching is successful, the error code analyzer records the service switching time.

6. The ASON-based dynamic rerouting automation test method according to claim 4, characterized in that: in step S3, the switched route is the best expected route selected by the controller, or the switched route belongs to one of the best expected routes selected by the controller;

and when the switched route is not or does not belong to the optimal expected route, controlling a controller to report an error.

7. The ASON-based dynamic rerouting automation test method according to claim 1 or 6, characterized in that: in step S3, the optimal route is a minimum node route or a minimum cost route.

8. The ASON-based dynamic rerouting automation test method according to claim 1, characterized in that: in step S4, when the expected route set is empty, the controller analyzes the test result and generates a test report in a uniform format.

9. An ASON-based dynamic rerouting automated testing system, comprising: