KR100298589B1 - How to Manage Path Change Data in Optical Systems - Google Patents

Abstract

The present invention relates to a path switching and path data management method of an optical system. In particular, by efficiently managing the routing data of a ring-type optical network, the effect on the hardware of the optical system is minimized and The present invention relates to ensuring reliability of an optical system by allowing a path to be switched in time, and an automatic path switching method of an optical system includes a first judgment step of determining whether an optical path has failed or a first judgment step. In the second judgment step, if there is no line failure, and in the second judgment step, if there is no obstacle in the path, the second judgment step is returned. The third judging step of judging whether there is no abnormality, and in the third judging step, If there is no abnormality in the path, it returns to the first judgment step, and if there is an error in the previously performed path, a fourth judgment step of determining whether the path should be changed, and the fourth judgment step, If it is not a condition to switch to, the first determination step, and if the condition to switch the path, the first processing step of creating a request queue message to output and process from the input path switching condition first, and the first And a second processing step of returning the request queue message by the first processing step to the corresponding subroutine for processing, and then feeding back to the first determination step. In the ninth judgment step of judging whether there is a request, and in the ninth judgment step, if there is a manual transfer request, In the tenth judging step of judging whether or not a sieve can be performed, in the tenth judging step, in the ninth judging step of writing a queue message to be outputted and performed first from the first transfer request, and in the ninth judging step The tenth processing step of sending the created queue message to a subroutine capable of processing, the eleventh judging step of judging whether the result of the transfer by the tenth processing step is suitable, and the result of the eleventh judging step, And an eleventh processing step of reporting success and reporting of success, wherein the optical system path initialization method includes a thirteenth processing step of loading backup data and a backup data loaded in the thirteenth processing step. A fourteenth processing step of screening and selecting the data; If it is not appropriate to compare to the first, the twelfth judgment step proceeds to the thirteenth judgment step, and if it is determined that the appropriate data in the above step, the fifteenth processing step of initializing the path as the corresponding data, and the above step In the thirteenth judging step of returning to the twelfth judging step, or in the thirteenth judging step, if it is the last path, the sixteenth step of backing up to memory and proceeding to the end step is determined. It is characterized by consisting of processing steps.

Description

Path Changes and Data Management Methods in Optical Systems

The present invention relates to a path switching and path data management method of an optical system. In particular, by efficiently managing the routing data of a ring-type optical network, the effect on the hardware of the optical system is minimized and It is about ensuring the reliability of the optical system by allowing the path to be switched in time.

Since the optical system has a wide frequency band, it can accommodate many communication channels at the same time, requires less power to transmit data signals, has a long distance to transmit at a time, and reduces the size of the communication cable. And using an optical signal transmission line for an optical cable having an advantage such as an extremely high speed of data transmission rate, and because a large number of subscriber channels can be transmitted to one optical cable, a failure occurs in the optical cable. This causes communication failure due to the inability of many subscribers to communicate at one time.

In the network configuration of such an optical system, in particular, in a ring network configuration, in the case of a line failure that may occur in an optical system of a remote office located in a remote location, an EBI circuit is established and, when necessary, a circuit switching is performed. And channel switching, which is a switching of the data transmission path.

In the path switching of the optical path, in particular, the path switching in the ring network is performed in the shortest time, and the data system can be efficiently managed to optimize the operation of the optical system, Minimize the influence of Hard Ware.

Hereinafter, a path switching and data management method in an optical system according to the related art will be described with reference to the accompanying drawings.

1 is a flowchart of a method for performing automatic path switching in an optical system according to a conventional method, and FIG. 2 is a flowchart of a method for performing manual path switching in an optical system according to a conventional method. This is a flowchart of a path initialization method in an optical system.

As shown in FIG. 1, a failure occurs in an optical path or an optical signal transmission channel in the optical system, and according to the prior art, the automatic path switching method according to the related art includes a first determination step S11 of determining whether a failure occurs in an optical path in operation. Wow,

A second determination step (S12) of returning to the first determination step (S11) when the failure has not occurred in the first determination step (S11), and determining whether the path is automatically switched when the failure occurs;

If switching of the path is not possible in the second determination step (S12), it is fed back to the first determination step (S11), and if automatic switching of the path is possible, the automatic switching to the most suitable path among the various path switching conditions is performed. A first processing step (S13) for checking a condition to be transferred;

A second processing step S14 for performing the transfer of the path using the path switching condition determined in the first processing step S13,

In the second processing step S14, after reporting the changed state data of the changed path to another task which is all of the Soft Wear tasks related to the transferred optical path (or channel), the first determination step It consists of a 3rd process step S15 which returns to S11.

Therefore, if there is a failure in the communication path or channel of the optical system using the optical path, the optimal path switching condition is determined, the automatic switching of the path is performed, and then the path changed to all other tasks using the path. By notifying or reporting status data for the optical system, the optical system communicates using the changed path, and again, performs an infinite loop to determine whether there is an error in the path.

As can be seen in Figure 2, the manual switching of the path according to the prior art is performed by the operator's request, such as maintenance and inspection by the optical system operator, to determine whether there is a manual switching request (S21). )Wow,

If there is no request for manual transfer in the third determination step (S21), a failure message is reported to the operator, and the process proceeds to a sixth processing step (S26).

However, if there is a request for manual switching by the optical system operator, the process proceeds to a fourth determination step S22 in which it is possible to determine whether switching of the path is possible.

If it is determined in the fourth determination step S22 that there is no path to be transferred or if a path is impossible due to a failure in all other paths, the process proceeds to the sixth processing step S26. Report a failure message and exit.

However, if it is determined by the fourth determination step S22 that the path is changeable, the process proceeds to a fourth processing step S23 for performing path switching.

A fifth determination step S24 of determining whether the transfer of the path by the fourth processing step S23 is performed well;

In the fifth determination step (S24), if the state data result of the switched path is less than the expected value, the process proceeds to the sixth processing step (S26), reports a failure result, and ends.

However, if the determination result in the fifth determination step (S24), the data of the transferred route is in accordance with the expected value, the process proceeds to the fifth processing step (S25), with a report of success and manual by the operator's request Path switching is terminated.

Therefore, the optical system operator can maintain the Net Wrok and change the route if there is a need to change the route for bad path or operation, and receive the result of the manual route change. do.

As shown in FIG. 3, the path initialization process of the optical system according to the related art includes a seventh step of reading path data from various backup data recorded in a memory device, in particular, a memory device consisting of an EEPROM. An eighth processing step S32 for selecting and selecting the most appropriate route data from the processing step S31 and the backup data loaded from the seventh processing step S31;

A ninth processing step S33 for resetting, i.e., resetting, the path using the optimal path data selected from the eighth processing step S32;

A tenth processing step S34 for recording data of the path initialized by the ninth processing step S33 in the EEPROM memory for backup;

A sixth determination step S35 for initializing until the tenth processing step S34 and determining whether the backed up path is the last of all paths in the corresponding network of the optical system;

In the sixth determination step (S35), if there is a path not yet initialized, the process returns to the ninth processing step (S33), repeats the initialization and backup of the corresponding data, and again, the sixth determination step If it is determined in S35 that all the paths are initialized and the corresponding data is backed up, the process proceeds to the end step.

Therefore, all paths of the optical system are compared with the backed up data, and are initialized as new paths in the environment closest to the state operated before the initialization, and the data is backed up to the EEPROM hardware.

Hereinafter, the operation of the path switching and data management method of the related art by the above configuration will be described in detail with reference to the accompanying drawings.

Path switching of the optical system automatically detects a failure occurring in the optical path or data path of the system as shown in FIG. 1 and automatically performs the path switching, and manually performs a path switching by the system operator as shown in FIG. As shown in FIG. 3, the path setting data backed up at the time of system initialization is loaded to initialize the system.

When the system is first started, all routing data is read in step S31. In step S32, among the data read in this way, find the data whose contents match each other. If no matching data is found, the processor selects the data in the memory backed up last. The data path of the system is initialized with the selected data, and the data of each initialized path is backed up to the hardware of EEPROM. In this way, all paths are initialized.

The optical system initialized as described above may cause a failure of the optical path and the data path in the operating state, so that the data path should automatically perform the path switching. If a noise occurs on an active network line, or if a failure occurs due to a circuit failure or disconnection of a remote system, the system automatically detects this failure. At this time, it is determined whether a failure occurs in the optical path and the data path in step S11. If it is determined that there is a failure in the next step S12 it is determined whether the path switching is possible for the path where the current failure occurs. At this time, if path switching is impossible, no switching is performed. If path switching is possible, the path switching condition is determined in step S13, and then path switching is performed in step S14. In this way, subroutines are called to inform other software tasks of the change of state that receives data from other paths.

If the system does not fail, the operator performs manual path switching when the operator adds the system or breaks one side of the line to repair the hardware. In this case, the operator requests manual path switching, and determines the manual switching request in step S21. If there is a manual transfer request, it is determined whether manual transfer is possible in the current path state in step S22. If there is an error in the manual transfer request or if the transfer is impossible, the terminal ends and reports the error in step S26. If the transfer is possible, the path transfer is performed in step S23. After the path switching is performed, the path switching result is determined in step S24 to check whether the path switching is performed correctly. At this time, if it matches the expected result, it terminates normally in step S25, otherwise it ends in error S26.

In this conventional technique, since the path backup data loaded after the S32 step is not compared with the state of the current system at the time of initialization, if the backup data of the system is not normal, a temporary service failure may occur. Each time is performed, the backup memory is backed up to the EEPROM in step S35, thereby reducing the life of the backup memory. In case of automatic path switching because of failure of data path or failure of optical path, it is difficult to execute the entire process quickly because the entire process first performs infinite loop at regular time intervals. Because path switching is performed in the order of loops to detect, it is not possible to prepare for an emergency failure, and must wait for the processing sequence until the current loop becomes a sequence of paths to deal with. Since a subroutine that takes a long time to be executed in the structure is called (S15), a service failure or noise may occur due to a delay of the overall path switching time. Furthermore, if other software tasks are higher than the priority of the task that performs automatic path switching, it is difficult to perform the path switching in a short time. To solve this problem, the priority of the path switching task should always be higher than that of other tasks. Therefore, the overall software structure is adversely affected, and even in the process of requiring manual switching by the operator, since the execution may conflict with automatic switching performed due to a failure of the path, the actual switching of the path is not performed. There was a problem.

The present invention, like the prior art described above, excludes shortening the life of hardware (EEPROM) by frequently accessing the hardware during initialization, and optimizes the initialization of the system by comparing the loaded data with the current state of the system, Compensation for failing to automatically handle automatic transfer of emergency failure in the process of automatic transfer due to the failure of the optical path and data path, minimize service interruption time by minimizing route transfer time, and route transfer Its purpose is to increase the reliability of the path switching by unifying the subjects into one.

1 is a flowchart of a method for performing automatic path switching in an optical system according to a conventional method;

2 is a flowchart of a method for manually performing path switching in an optical system according to a conventional method;

3 is a flowchart of a path initialization method in an optical system according to a conventional method,

4A is a flowchart of a method for automatically switching a path of an optical system according to the present invention;

4b is a flowchart of a method for performing automatic path switching in an optical system according to the present invention;

4c is a flowchart of a method for automatically reporting a path change in an optical system according to the present invention;

5 is a flowchart of a method for manually performing path switching in an optical system according to the present invention;

6 is a flowchart of a path initialization method of an optical system according to the present invention.

The present invention devised to achieve the above object, in performing the transfer of the path, in order to shorten the execution time and ensure a constant transfer time, LIFO (Last In First Out) and FIFO (First In First Out) , The process of detecting an alarm can be performed according to the priority by dividing the order of the optical path and the path, and excluding the simultaneous execution with the high priority task as much as possible, First of all, the path switching can be performed first, and in managing the path setting data, the path setting directly related to the service is managed by reflecting the configuration state of the optical system and the system operation state as much as possible. The automatic path switching method of the optical system is to determine whether the optical path has failed. In the first judging step, if there is no line disturbance, a second judging step of judging whether there is an obstacle in the path, and in the second judging step, if there is no obstacle in the path, returns to the first judging step, If there is an obstacle in the third judgment step of determining whether there is no abnormality in the previously performed path, and if there is no problem in the previously performed path in the third judgment step, it is fed back to the first judgment step, and If there is an abnormality in the path that was performed, the fourth judgment step of determining whether the path should be changed, and in the fourth judgment step, return to the first judgment step if the path is not a condition to be transferred. Is the condition to switch to, the first to create a request queue message that outputs and processes the path input condition first. And a second processing step of transmitting the request queue message according to the first processing step to a corresponding subroutine for processing, and then feeding back to the first determination step.

In the passive path switching method of the optical system, the ninth determination step of determining whether there is a manual transfer request, the tenth determination step of determining whether the transfer can be performed if there is a manual transfer request in the ninth determination step, and In the tenth judging step of, the ninth judging step of creating a queue message to be outputted and performed first from the first transfer request, and a column for sending the queue message created in the ninth judging step to a subroutine capable of processing An eleventh determination step for determining whether the result of the transfer by the tenth processing step is suitable, and an eleventh processing step for reporting success and ending if the result is suitable in the eleventh determination step. Characterized in that

A path initialization method of an optical system includes: a thirteenth processing step of loading backup data, a fourteenth processing step of selecting and selecting backup data loaded in the thirteenth processing step, and the data selected in the step If not suitable for initializing, if it is not suitable, the twelfth judgment step proceeds to the thirteenth judgment step, and if it is determined that the data is suitable in the above step, the fifteenth processing step of initializing the path as the corresponding data; In the step 13, if it is determined whether the path initialized is the last path, or the thirteenth judgment step of returning to the twelfth judgment step, and if the last path in the thirteenth judgment step, the row is backed up to the memory and proceeds to the end step. It is characterized by consisting of a sixth processing step.

Hereinafter, with reference to the accompanying drawings will be described a path switching and data management method of the optical system of the present invention.

Figure 4a is a flow chart of the automatic path switching request method of the optical system according to the present invention, Figure 4b is a flow chart of the automatic path switching method of the optical system according to the present invention, Figure 4c is a path automatic of the optical system according to the present invention FIG. 5 is a flowchart of a method for performing manual path switching of an optical system according to the present invention, and FIG. 6 is a flowchart of a path initialization method of an optical system according to the present invention.

In the path switching method of the optical system, the automatic path switching method is the first determination step (S41) of determining whether the failure of the optical path;

A fifth judgment step (S43) of determining whether a condition is required to transfer the track when there is an obstacle in the first judgment step (S41);

In the fifth determination step (S43), if the line is to be switched condition, the second judgment step (S42), and if the line is to be switched, the last input path switching condition to output first to process A third processing step (S45) for creating a request queue message,

A fourth processing step S47 for transmitting the request queue message created in the third processing step S45 to the corresponding subroutine for processing, and then feeding back to the first judging step S41;

In the first determination step (S41), when there is no line failure, the second determination step (S42) for determining whether there is a failure in the path,

In the second determination step (S42), if there is no obstacle in the path, it is fed back to the first determination step (S41), and if there is a failure in the path, the third determination step (S44) to determine whether there is no problem in the previously performed path. )Wow,

In the third determination step (S44), if there is no problem in the previously performed path, it is returned to the first decision step (S41), and if there is an error in the previously performed path, whether the path should be changed. A fourth judgment step (S46) of judging

In the fourth determination step (S46), if it is not a condition to change the path, it is fed back to the first determination step (S41), and if the condition to change the path, first outputting and processing from the first path switching condition inputted first The first processing step of creating a request queue message (S48),

And a second processing step (S49) for returning to the first determination step (S41) after transmitting the request queue message by the first processing step (S48) to the corresponding subroutine,

Subroutine for processing the request queue message of the second processing step (S49) and the fourth processing step (S47), the sixth determination step (S410) for determining whether the request queue message has arrived;

In the sixth judging step (S410), if the request queue message has not arrived, return to the sixth judging step (S410), and if the request queue message has arrived, the seventh judging to determine whether to execute the request queue message. Step S411,

In the seventh determination step (S411), if it is determined that the message does not execute, return to the sixth determination step (S410), and if it is determined that the message to be executed, the fifth processing step (S412) for performing the transfer of the path Wow,

A sixth processing step (S413) of creating a queue message for notifying other tasks using the corresponding path of the route switching data by the fifth processing step (S412);

And a seventh processing step (S414) for sending the task queue message by the sixth processing step (S413) to a subroutine for processing the notification to the task, and feeding back to the sixth determination step (S410).

The subroutine for processing the task queue message of the seventh processing step (S414), if it does not arrive by determining whether the task queue has arrived, the eighth judgment step (S415) to proceed to the end step, and

In the eighth determination step (S415), if the task queue has arrived, it consists of an eighth processing step (S416) of calling another task subroutine to send the data of the path switching,

The passive path switching method of the optical system includes a ninth determination step (S51) of determining whether there is a manual switching request;

In the ninth determination step (S51), if there is a manual transfer request, the tenth determination step (S52) for judging whether or not the transfer can be made, and

In the tenth determination step (S52), the ninth processing step (S53) for creating a queue message to be output and performed first from the first transfer request, and

A tenth processing step S54 for sending the queue message created in the ninth processing step S53 to a subroutine capable of processing;

An eleventh judgment step S55 for judging whether the result of the transfer by the tenth processing step S54 is appropriate;

If the result is appropriate in the eleventh determination step (S55), it consists of the eleventh processing step (S56) of reporting and ending of success,

If there is no manual transfer request in the ninth judgment step S51, no switchover is possible in the tenth judgment step S52, and in the eleventh judgment step S55, an error report is reported. And the twelfth processing step (S57) to end,

The path initialization method of the optical system includes a thirteenth processing step (S61) of loading backup data,

A fourteenth processing step S62 for sorting and selecting the backup data loaded in the thirteenth processing step S61;

A thirteenth determination step S63 of proceeding to the thirteenth determination step S65 if the data selected in the fourteenth processing step S62 is not suitable for comparison with the initialization;

If it is determined that the data is suitable in the twelfth determination step (S63), as the data, the fifteenth processing step (S64) for initializing the path,

Determining whether the path initialized in the fifteenth processing step (S64) is the last path; otherwise, the thirteenth determination step (S65) of returning to the twelfth determination step (S63),

In the thirteenth determination step (S65), if it is the last path, it consists of a sixteenth processing step (S67) which backs up to the memory and proceeds to the end step.

Hereinafter, a detailed operation of the path switching and data management method of the optical system of the present invention having the above configuration will be described with reference to the accompanying drawings.

According to the present invention, in performing initialization, the step of loading the backed up data is selected (S61), and the matching data is selected from among the loaded data, or when the matching data does not exist, the processor selects the last backed up data. (S62), determining whether the selected data will not cause a problem even if the initializing is compared with the current system state (S63), initializing each path (S64), and determining whether it is the last path. And step S67 of backing up to the EEPROM after all paths have been initialized.

The path switching, which is automatically performed due to the failure of the optical path and data path, first unifies the order of path switching by using one of the path switching bodies, and the path switching subject receives the request for path switching with a queue message. These path change request queue messages are handled by FIFO or LIFO according to the level of fault handling, and the path detection can be performed quickly according to the level of failure by classifying the fault detection stage into the fault of the optical path and the fault of the data path. Since the path switching request is made with a queue message, it is not influenced by the execution of other tasks, and the constant path switching execution time and the minimum execution time can be guaranteed.

Since path switching errors, which sometimes occur after the path switching, are stored in a flag, are re-done in the next path switching step to increase the reliability of path switching, and reporting to other tasks is also performed asynchronously using queue messages. Do not affect the execution time of path switching.

In addition, in the manual path switching request, since the path switching request is made through the FIFO queue message, the possibility of conflict with the automatic path switching is eliminated to the maximum, and the effect of minimizing the execution time of the automatic path switching is minimized. do.

Forced path switching method by the operator of the configuration as described above, also through the manual transfer process of the important communication channel, so that it can be properly used for testing, maintenance, etc. Also, the path changed in the process of switching the path If the fault occurs again, the path switching can be performed again, thereby improving the reliability of the system.

The optical path change and management method of the present invention configured as described above minimizes the execution time of the transfer using LIFO and FIFO, and generates a flag in preparation for a failure occurring during the transfer, thereby improving reliability of the transfer. By notifying the dedicated subroutine that reports the changed data of the track or the route to each task, the transfer is first made for the protection of the route, the unnecessary waiting time is reduced, and the optimal data is set in the initialization setting. Extraction has the effect of setting the correct path and extending the life of the hardware.

Claims (7)

In the automatic path switching method of the optical system comprising a first and a second optical signal transceiver, a system controller, a path management unit, a backup unit, a voice and a data processing unit, the system control unit by the first and second optical signal transceiver By controlling, a first step of determining whether a failure occurs in the corresponding optical path, and in the first step, if there is no failure in the corresponding optical path, a second step of controlling the path management unit to determine whether there is a failure in the corresponding path; In step 2, if there is no obstacle in the corresponding path, returning to the first step, and if there is an obstacle in the corresponding path, determining whether there is no obstacle in the previously performed path, and in the third step, If there is no obstacle in the path, it returns to the first step, and if there is an error in the previously performed path, the path must be changed. In the fourth step of determining whether the condition is a condition, and in the fourth step, if the condition is not a condition for switching the path, it is fed back to the first step, and if the condition is a condition for switching the path, the first path switching condition is first outputted and processed. And a fifth step of creating a corresponding request queue message, and a sixth step of sending a request queue message generated in the fifth step to a corresponding subroutine to perform related processing and then returning to the first step. Characterized in the path switching data management method of the optical system. The method of claim 1, wherein when there is a failure in the optical path in the first step, the seventh step of determining whether the line should be changed by the system controller, and in the seventh step, the condition of not switching the light path In this case, when the feedback is returned to the second step and the optical path is to be switched, the eighth step of creating a corresponding request queue message is first outputted from the last input path switching condition, and the request queue message created in the eighth step corresponds. And a ninth step of returning to the first step after transmitting and processing the subroutine. The method according to claim 1 or 2, wherein the subroutine for processing the request queue messages of the sixth and ninth stages comprises: a tenth step of determining whether a request queue message has arrived by the system control unit; In the step, if the request queue message has not arrived, it is fed back and judges again. If the request queue message arrives, the eleventh step of determining whether to execute the request queue message, and in step 11 above, it is determined that the message is not executed. If it is determined that the message is to be executed and the message is executed, the twelfth step of performing the path switching and the path switching data according to the twelfth step are pre-empted by another application using the path. The thirteenth step of creating a cue message to be notified by election, and the first-in, first-out by the task queue message parcel according to the thirteenth step is sent to the subroutine to send the task Processing to notify, and path switching data management method for an optical system, characterized in that the configuration includes the step of claim 14, fed back to the step 10. The method of claim 3, wherein the subroutine that processes the task queue message of the fourteenth step determines whether or not the task queue has arrived, and if not, proceeds to a terminating step; and in the fifteenth step, the task And when the queue arrives, calling a corresponding other task subroutine to send the data of the path switching, wherein the path switching data management method of the optical system is configured. In the manual path switching method of the optical system comprising the first and second optical signal transmission and reception unit, system control unit, path management unit, backup unit, voice and data processing unit, the system control unit determines whether there is a manual transfer request by the operator; In step 17 and the seventeenth step, if there is a manual transfer request, an eighteenth step of determining whether a transfer can be performed; and in the eighteenth step, a corresponding cue message is generated so that the first transfer request is output first. A system control unit for determining whether the corresponding result of the transfer by the cue message sent by the twentieth step and the twentieth step that is sent to the corresponding subroutine capable of processing the cue message created in the nineteenth step and the twelfth step are suitable. A twenty-first step of judging from the; and a twenty-second step of reporting success of the transfer and ending if the corresponding result is suitable in the twenty-first step; Path switching data management method for an optical system, characterized in that the sex. 6. The method of claim 5, wherein in the seventeenth step, when there is no manual transfer request, in the eighteenth step, when the transfer is not possible, and in the twenty-first step, the result is not suitable, the corresponding error report is reported. And a twenty-third step of generating and terminating it. A path initialization method of an optical system comprising first and second optical signal transceivers, a system controller, a path manager, a backup, a voice, and a data processor, the system controller comprising: a twenty-fourth step of loading backup data from a backup; A twenty-fifth step of selecting and selecting backup data loaded from the backup unit in the twenty-fourth step; and a twenty-sixth step of determining, by the system controller, whether the data selected in the above-described step is suitable for initializing a path; When it is determined that the data is suitable for initializing the path in the determining step, the 27th step of initializing the path using the data, and the system controller determines that the path is not suitable for initializing the path in step 26; If the data of the path initialized in step 27 is received, whether the corresponding path is not the last path. If it is determined that the path is not the last path, step 28 returns to the 26th step; and in step 28, if the corresponding path is the last path, the step 29 is backed up to the backup unit and proceeds to the end step. Path switching data management method of the optical system, characterized in that the configuration comprises a.