JP3452968B2 - Line switching method and device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line switching method and device for switching a plurality of lines accommodated in a transmission device according to a line switching pattern.

[0002] In recent networks, there has been one
There is a network in which one or a plurality of physical lines are connected, or one transmission line is provided between transmission devices, or a plurality of logical lines are accommodated in a plurality of physical lines. It is necessary to switch the lines in order to make effective use of the lines (including the reservation operation function) and to change the use status of the lines as time passes. In addition, it is also necessary to switch the line in order to bypass the faulty line when a fault occurs. Such a line switching function is a flexible reservation operation under line management that can quickly determine what kind of line usage pattern the network is operating at the time you want to grasp the line usage status. It is required to have both functions.

In the above-mentioned network line switching, it is difficult to switch the lines in synchronization between the transmission devices. Therefore, when the lines are switched between the transmission devices, the line switching timing is shifted. Will cause a temporary failure. When such a pseudo fault occurs together with a fault that actually occurs, it becomes a great obstacle to analyze the cause of the actual fault.

[0004]

2. Description of the Related Art For the above-mentioned line switching, a line switching system in which the lines are switched one by one has been conventionally adopted. The outline of this line switching method is as follows.

A system configuration adopting the line switching method is shown in FIG. As shown in this figure, the monitoring device 60
Each transmission device 60 subject to line switching control by 0
2 ₁ , 602 ₂ , ... Are transmission lines 604, 6 respectively.
Cards 608 and 610 accommodating 06, and a card 60
8 and 610, a bus 612, a CPU 614 connected to the bus 612, a memory 616 connected to the bus 612, and a communication device 618 connected to the bus 612. A program for executing the processing shown in FIG. 16 is written in the memory 616.

Line switching in this system configuration is
This is done as follows. Transmission devices 602 ₁ and 602 ₂
Line above (channel or time slot), for example to activate the transmission device 602 _1, i.e. the transmission path the circuit on the transmission apparatus 602 ₁ via the transmission device 602 ₁ 60
When connecting to a predetermined line on 2 ₂ , a command is sent from the monitoring device 600 to the transmission device 602 ₁ via the monitoring line 601.

The transmission device 602 ₁ which received this command
Communication device 618 sends the command to CPU 614 via bus 612. Communication unit 702 that received the command
Notifies the command analysis unit 704 of the command. The command analysis unit 704 analyzes the command, determines that the command is a command for activating a line, and requests the line switching control unit 706 to switch the line. The line switching control unit 706 uses the bus 612 to send the cards 608,
The firmware provided in 610 (see the card control unit 708 in FIG. 16) is notified.

[0008] card controller, a bus address transmission apparatus 602 ₁ is assigned in advance when it is started, the line is connected on the transmission line accommodated in the card (the channel, or time slot) to the bus 612 . That is, a gate circuit (not shown) provided on the card is opened at the bus address to connect the line on the transmission line to the bus 612. This can be applied to the transmission device 602 _2.

The card control unit 708 notifies the line switching control unit 706 of the result of line switching. The line switching control unit 706 sends the result [line number, control content (active), success or failure] to the response issuing unit 710.
Send to. The response issuing unit 710 forms response information including the result, and transmits the response information to the communication unit 7
Under the control of 02, it transmits to the monitoring device 600 via the communication device 618 and the monitoring line 601.

[0010] Also, the deactivation of each line contained in the transmission apparatus 602 ₁ and the like is also substantially the same as the activation. That is,
Command has deactivated as the content, the processing in the transmission device 602 ₁ when the command is sent from the monitoring device 600 to the transmission device 602 _1, the same process and activation are carried out, The processing in the command analysis unit 704 determines that the command is inactive, and therefore the line switching control unit 706 inactivates the line designated by the command to the card control unit 708, that is, connects until then. The difference is that the lines on the transmission lines 604 and 606 that have been established and the connection to the bus 612 are opened. Even when the deactivation is performed in this way, the response information is returned to the monitoring device 600 as in the case of the activation.

Such line switching is sequentially performed for each line.

[0012]

As described above, the conventional line switching system is a system for each line. But,
Line switching is usually performed in units of tens or hundreds of lines.

Therefore, in the above-mentioned conventional method, the traffic between the monitoring device and the transmission device increases, and the time required for line switching also increases. Further, not only is it difficult to determine what kind of line usage mode the network is currently used in and to realize the reservation operation function, but it also hinders the operation of the network.

Further, it is difficult to switch the lines completely and simultaneously between the opposite transmission devices, and a pseudo line failure occurs in the line to be switched due to the shift of the line switching timing. Will end up. Such a pseudo line failure is of a nature to be recovered by the completion of the line switching between the related transmission devices.

Since the line failure that occurs when the line is switched is a pseudo line and not an actual line line, when it is displayed on the screen of the monitoring device, the pseudo line and the actual line line are not displayed. Indistinguishable from obstacles. Therefore, if a failure occurs during line switching, it is difficult to isolate the failure and to elucidate the cause of the failure, and it takes a long time to elucidate the failure.

The present invention was created in view of such technical problems, and changes, confirmations, and confirmations of network operation modes.
It is an object of the present invention to provide a line switching method and its device that facilitate state management, reservation operation, and determination of a failure that occurs in line switching.

[0017]

FIG. 1 shows a block diagram of the principle of the invention described in claim 2. The invention according to claim 1 is
In a line switching method for switching a plurality of lines accommodated between transmission devices in a network under the control of a monitoring device, a plurality of lines may be provided for each transmission device prior to the line switching.
It should be applied in each network configuration to be realized.
Set the line switching pattern that indicates the connection status of each line.
In this case , a single line switching command that specifies one of a plurality of line switching patterns is sent from the monitoring device to the transmission device targeted for line switching, and the single line switching command is sent.
According to the specified line switching pattern in the line switching
The transmission status of the line accommodated in the target transmission equipment
The switching is performed according to the definition corresponding to the line switching pattern in .

The invention according to claim 2 is, as shown in FIG. 1, a line switching device for switching a plurality of lines accommodated between the transmission devices 2 and 4 under the control of the monitoring device 6,
Command issuing request means 8 provided in the monitoring device 6 for requesting transmission of a single line switching command for designating a line switching pattern, and in the monitoring device, responding to a request from the command issuing requesting device 8. Command issuing means 10 for issuing a single line switching command, a communication means 16 for sending the single line switching command issued by the command issuing means 10 to the monitoring line 14, and the transmission devices 2, 4 And a command receiving means 18 for receiving a single line switching command transmitted from the communication means 16 via the monitoring line 14 and a plurality of lines accommodated in the transmission devices 2 and 4. Line switching means 20 and multiple network configurations to be realized
Shows the connection status of each line that should be applied
Based on the pattern table that defines the line switching pattern
And a line switching control means 22 for causing the line switching means 20 to switch each of the lines defined corresponding to the line switching pattern designated by the single line switching command. To do.

According to the third aspect of the invention, in the line switching method according to the first aspect, when there is a difference between the operating line pattern collected from the transmission device and the line pattern managed by the monitoring device, the monitoring is performed. The device is characterized in that a single line switching command is issued to switch the operating line pattern to the line pattern designated by the single line switching command.

According to a fourth aspect of the present invention, in the line switching method according to the first aspect, a temporary line fault occurring at the time of line switching by a single line switching command is suppressed.

According to a fifth aspect of the present invention, in the line switching method according to the first aspect, a temporary line failure that occurs when a line is switched by a single line switching command is suppressed, and a line switching target is set after the line switching is completed. It is characterized in that the suppressed line failure information is collected from the transmission device.

According to a sixth aspect of the present invention, in the line switching method according to the first aspect, a line fault that may temporarily occur at the time of line switching by a single line switching command is added to the device configuration information of the line. It is characterized by responding and estimating, and when the line fault matches the estimated fault information, the fault information is suppressed.

According to a seventh aspect of the present invention, in the line switching method according to the first aspect, when the designated time of the day designation for periodically switching the line and the designated time for performing the line switching at a specific date and time match. , Issuance of a single line switching command with priority to date specification.

According to an eighth aspect of the present invention, in the line switching method according to the first aspect, a priority is assigned to each of the plurality of monitoring devices provided in the network, and the monitoring device with the highest priority is changed to another. A transmission device that broadcasts the same line switching control information to a monitoring device and can be monitored by a monitoring device with a high priority among monitoring devices other than the monitoring device when the line switching control by a monitoring device with a high priority cannot be performed. It is characterized by performing line switching control.

[0025]

[Action] In the invention of claim 1, wherein, upon switching of a plurality of lines are accommodated between the transmission device by the monitoring device,
From the monitoring device to each transmission device ,
Information that specifies the line switching pattern defined by
It sends a non-single line switching command. This single time
Set the line switching pattern specified by the line switching command.
The connection status of the line accommodated by each transmission device
Switch. That is, in the invention described in claim 1,
Is it the number of lines to be switched in the transmission device?
However, a single line switching command
Line switching can be performed.

According to the second aspect of the present invention, the transmission device that receives the single line switching command is accommodated between the transmission devices according to the line switching pattern designated by the line switching command in response to the line switching command. You are switching between multiple lines. Command receiving means 18 receives
Line switching pattern included in the selected line switching command
Based on the information indicating the line switching control means 22, Pas
The switching operation by the line switching means 20 is controlled according to the line switching pattern defined on the turntable .
That is, the command issuing request means provided in the monitoring device
8. Command issuing means 10 and communication means 16
In response to a single line switching command sent, a plurality of line switchings are collectively performed.

According to such a line switching, it becomes easy to grasp the line operating mode for the line switching, to easily manage the operation of the reservation operating function, and to improve the line switching speed. The invention according to claim 3 can switch a plurality of lines designated by the line switching pattern similarly to the inventions according to claim 1 and claim 2. In addition to the effect obtained by the invention described in claim 1, when a mismatch occurs in the operation pattern between the monitoring device and the transmission device, the matching process can be easily performed.

According to the invention described in claim 4, a plurality of lines designated by the line switching pattern can be switched similarly to the inventions described in claims 1 and 2. In addition to the effect obtained by the invention described in claim 1, it is possible to suppress a line failure temporarily generated at the time of line switching by a single line switching command, and to easily distinguish it from an actual line failure, Useful for simplifying failure analysis.

According to the invention of claim 5, like the inventions of claims 1 and 2, a plurality of lines designated by a line switching pattern can be switched. In addition to the effect obtained by the invention described in claim 1, a line fault temporarily generated at the time of line switching by a single line switching command is suppressed, and the line fault information suppressed at the end of the line switching is collected. be able to. This makes it easy to distinguish from an actual line failure and helps in failure analysis.

According to the sixth aspect of the invention, a plurality of lines designated by the line switching pattern can be switched in the same manner as the first and second aspects of the invention. In addition to the effect obtained by the invention described in claim 1, it is possible to distinguish between a line failure caused by line switching and an actual line failure that is not so, and collect the actual line failure in real time. .

According to the invention of claim 7, a plurality of lines designated by a line switching pattern can be switched similarly to the inventions of claims 1 and 2. In addition to the effect obtained by the invention according to claim 1, in the operation by specifying the day of the week and the date, when the specified times match, the line switching by the date specification is prioritized to operate the line switching. it can.

According to the invention described in claim 8, a plurality of lines designated by a line switching pattern can be switched similarly to the inventions described in claims 1 and 2. In addition to the effect obtained by the invention according to claim 1, when a plurality of monitoring devices are provided in the network, when the line switching operation by the master that has become the master and has performed the line switching operation is hindered , The line switching operation can be performed by the monitoring device having the next highest priority after the master.

[0033]

FIG. 2 shows an embodiment of the invention described in claims 1-8. In FIG. 2, reference numeral 50 is a monitoring device, and the monitoring device 50 is a CPU 5 connected to a bus 52.
4, a display device 55, a disk device 56, a memory 58, and a communication interface device 60. The communication interface device 60 is connected to each of the transmission devices 64 ₁ and 64 ₂ via a signal line 62.

Transmission lines 66 and 68 are connected between the transmission devices 64 ₁ and 64 ₂ , and lines # 101, 102 and 103 (logical lines) are activated / deactivated on the transmission line 66. It is possible to use the transmission line 68
In the above, the lines # 201, 202, 203 (logical lines) can be used as active / inactive.
The solid line in FIG. 2 indicates that the cell is active, and the dotted line indicates that the cell is inactive. Activation means setting the line in a state in which signals can be transmitted through the line, and deactivation means setting the line in a state in which signals cannot be transmitted through the line. Line switching refers to connecting between lines on the corresponding transmission lines on the input side and the output side.

[0035] The transmission device 64 ₁ is connected host computer, the terminal device to the transmission device 64 _2, PBX (private branch exchange) or the like is connected. As shown in FIG. 3, the monitoring device 50 includes a line switching request display unit 70, a polling control unit 72, a command issuing unit 74, a communication unit 75, a reservation operation control unit 76, a line switching control unit 78, and a response / report receiving unit. 80, a state management unit 82, a reservation operation table 84,
The line switching request display unit 7 includes a pattern table 86, a configuration information storage unit 88, and a state management table 90.
0, polling control unit 72, command issuing unit 74, communication unit 75, reservation operation control unit 76, line switching control unit 78,
Response / report receiving unit 80 and state management unit 82
Consists of a program. These programs are stored in the disk device 56 in advance, and when executed by the CPU 54, they are read from the disk device 56 into the memory 58 and executed by the CPU 54.

FIG. 4 is a diagram showing a processing flow of processing performed by the polling control unit 72, and FIG. 5 is a diagram showing a processing flow of processing performed by the line switching control unit 78. Figure 6
FIG. 7 is a diagram showing a part of a process flow of a process performed by the state management unit 82, and FIG. 7 is a diagram showing a remaining part of a process flow of a process performed by the state management unit 82. Line VI-VI in FIGS. 6 and 7
When combined with each other, the entire processing flow of the processing performed by the state management unit 82 is configured. FIG. 8 is a diagram showing a part of the processing flow of the processing performed by the reservation operation control unit 76, and FIG. 9 is a diagram showing the remaining portion of the processing flow of the processing performed by the reservation operation control unit 76. When the lines VIII-VIII in FIGS. 8 and 9 are combined, the entire processing flow of the processing performed by the reservation operation control unit 76 is configured.

As described above, the line switching request display section 7
0, the command issuing unit 74, the response / report receiving unit 80, and the communication unit 75 also perform processing by programs, but the processing flow thereof is not shown. The processing performed by each of these units will be described in the following description.

The configurations of the transmission device 64 ₁ and the transmission device 64 ₂ are substantially the same as those of the transmission device shown in FIG. 15 and have the pattern definition table 711 (see FIG. 10). The pattern definition table 711 is shown in FIG.
5 disk device 56. Its memory 616
10 stores a program for performing the processing shown in FIG. 10, and the program is configured to be executed by the CPU 614. Of the programs, the communication unit 702
It is the same as FIG. The command analysis unit 705 shown in FIG. 10 relates to the inventions according to claims 1 to 8, analyzes a line switching command configured to have a line switching pattern number, and sends the line switching command to the pattern switching control unit 707. Request that switching be performed according to the line switching pattern. The pattern switching control unit 707 shown in FIG.
Responds to the request and reads the line switching pattern defined by referring to the pattern definition table 711 with the line switching pattern number. Then, a request for switching each line designated by the line switching pattern is issued to the card control unit 709 (see FIG. 10) for each line. The card control unit 709 switches the line corresponding to the line switching request according to the description of FIGS. 15 and 16.
The response issuing unit 713 includes the response information including the response information of each of the lines designated by the line switching pattern designated by the line switching command in FIGS. 15 and 1.
6 is returned to the monitoring device 600 in the same manner as described above.

2, 10, and 15, transmission devices 64 ₁ and 64 ₂ correspond to the transmission devices 2 and 4 of FIG. 1, and include a CPU 54, a memory 58, and a line switching control unit 7.
Reference numeral 8 corresponds to the command issue requesting means 8 in FIG. CP
The U54, the memory 58, and the command issuing unit 74 correspond to the command issuing unit 10 of FIG. 1, and the communication interface and communication unit 75 correspond to the communication unit 16 of FIG. The monitoring line 601 corresponds to the monitoring line 14 of FIG.
4, the memory 616, the communication device 618, the communication unit 702, and the command analysis unit 705 correspond to the command receiving unit 18 in FIG. The CPU 614, the memory 616, and the pattern switching control unit 707 correspond to the line switching control unit 22 of FIG. 1, and the cards 608 and 610 and the card control unit 709 are
It corresponds to the line switching means 20 of FIG.

The operation of the system configured as described above will be described below. (1) Line switching For convenience of explanation, a line switching pattern as shown in FIG. 11 is registered in the pattern table 86, and a line switching pattern 1 to line switching pattern 2 is switched. Will be described. In the line switching pattern 1 shown in FIG. 11, the transmission line 66 is deactivated and the transmission line 6 is
An example in which 8 is activated is shown. Line switching pattern 2 is
The opposite example is shown.

When a line switching request is input by operating the keyboard of the display device 55 on the line switching request display unit 70, the line switching control unit 78 (200 in FIG. 5) waiting for line switching from the line switching request display unit 70. (See 202) in FIG. 5).

Upon receiving the command for requesting the line switching, the line switching control unit 78 refers to the pattern table 86 and determines whether the requested line switching pattern is the registered line switching pattern ( (See 204 in FIG. 5).

Under the above example, the registered line switching pattern is
It is possible to obtain the agreement with the line switching pattern 2
If there is a match, the line switching control is performed.
The unit 78 sends to the command issuing unit 74 each associated transmission device,
For example, the transmission device 64₁, 64 ₂Line switching command
Is issued (see 206 in FIG. 5). Line switching
As shown in FIG. 11, the command is, for example, a line switching pattern.
Transmission device 64₁And transmission device 64₂Among
Inactivation of each line on the transmission line 66 and transmission device 64₁Over
And transmission device 64₂Activation of each line on the transmission line 68 between
Each line is deactivated instead of
This is a command for switching between activation and activation. This frame
And the line switching according to claim 1 to claim 8.
Supports a single line switching command that specifies a pattern
To do.

With the request to issue the line switching command,
Then, the status management unit 82 is notified that the line is being switched (FIG. 5).
No. 208). In response to this notification, the status management unit 82
Indicates the status of the status management table 90 corresponding to the line switching.
Rewrite management information. Thereby, the monitoring device 50
Transmission device for line switching, for example transmission device 64₁, 6
Four ₂Is set to the failure suppression state (see 350 in FIG. 12).
See).

The command issuing unit 74 edits the line switching command for each related transmission device and sends it to the communication unit 75.
The communication unit 75 transmits the sent line switching command to the designated transmission device, for example, the transmission device 64 ₁ or 64 ₂ .

By the line switching command (command for activating the line) transmitted from the communication unit 75 to the designated transmission device, for example, the transmission device 64 ₁ and the transmission device 64 _{2 in} FIG. ₁ and each line # 101, # 1 on the transmission path 66 connected between the transmission device 64 ₂
02, # 103 switched together from an inactive state to an active state, the transmission device 64 ₁ and the transmission device 64 each line on the transmission line 68 connected between ₂ # 201, # 202, # 2
03 are collectively switched from the active state to the inactive state.

The line switching will be specifically described below with reference to FIG. 15 in addition to FIG. Monitoring device 50 (FIG. 15)
600) of transmission device 64 ₁ and transmission device 64 ₂
When a single line switching command having a line switching pattern number and activation information is sent to and received by the communication unit 702, the command analysis unit 705 that responds to the line switching command sends the received command to the line switching. Recognize that the command is a pattern. In response to this recognition, the pattern switching control unit 707 refers to the pattern number table 711 with the line switching pattern number specified by the command and activates the line corresponding to the activation pattern of the line defined therein. The card control unit 709 is instructed to activate the card control unit 709.

By this activation, the transmission device 64 ₁ and the transmission device 64 ₂ are activated by the bus address (the bus address synchronized with the line on the transmission line 66 or the transmission line 68) pre-assigned at the time of activation. , A transmission path contained in the card (for example, transmission paths 604, 6 in FIG. 15).
06) connect the line (channel or time slot) on bus 612. That is, a gate circuit (not shown) provided on the card is opened at the bus address to connect the line on the transmission line to the bus 612. Such connection processing is sequentially performed for each line under the control of the cards 608 and 610.

When this sequential line connection is completed for all the lines specified by the line switching pattern, the card control unit 709 notifies the line switching control unit 707 of the result of line switching. Line switching control unit 706
Sends the result [line number, control content (active), success or failure] for all lines to the response issuing unit 710. The response issuing unit 710 forms response information including the above result, and transmits the response information to the monitoring device 50 via the communication device 618 (see FIG. 15) and the monitoring line 62 under the control of the communication unit 702.

By performing such line switching,
It is easy to determine what kind of line usage mode the network is currently operating, and the reservation operation function can be easily realized as described later.

In the above-mentioned pattern comparison, if no match is obtained between the patterns, a notification indicating that the patterns do not exist is returned from the line switching control unit 78 to the line switching request display unit 70 and the fact is displayed on the screen. Do (2 in FIG. 5)
10).

(2) Regarding suppression of fault information at line switching
When the line switching is started as described above, a report is returned from the transmission device 64 ₁ and the transmission device 64 ₂ to the monitoring device 50. The report is notification information sent unilaterally from the transmission device to the monitoring device. The notification information carried on the report is carried on the report by the notification means provided in the conventional transmission device. All the reports appearing in the following explanations are similarly created and transmitted to the monitoring device 50.

The report thus transmitted is sent to the response / report receiving unit 80 via the communication unit 75.
It is received at and passed to the state control unit 82. When the status control unit 82 receives the report (300, 302 in FIG. 6).
If the notification of line switching is made by checking the contents of the report (see 304 in FIG. 6), the transmission devices 64 ₁ and 64 ₂ targeted for line switching are managed as being in line switching (see FIG. 6). 306), state management table 9
The contents are written in 0 (see 308 in FIG. 6).

The report is a fault information notification (see FIG. 6).
316), the transmission device that has returned the report when the contents of the report are checked is the transmission device 64 ₁ and the transmission device 64 _{2 that} were previously subjected to line switching.
When it corresponds to (see 318 and 320 in FIG. 6), the notified failure information is discarded (322 in FIG. 6 and 35 in FIG. 12).
2). This makes it possible to suppress fault information during line switching. If not applicable, the failure information is reflected in the status management table 90 (see 330 in FIG. 6).

The collection of the fault information thus suppressed is performed as follows. When the report notified from the transmission device 64 ₁ and the transmission device 64 ₂ after the start of the line switching described above indicates the end of the line switching (the execution result of the line switching) (see 310 in FIG. 6), the report Is transferred to the line switching control unit 78 and the state management unit 82 via the communication unit 75, the response / report receiving unit 80. The line switching control unit 78 that has received the execution result
Is the line switching request display unit 7 which is the requester of the line switching.
0 and the information of the line switching result to the state management unit 82.
The state management unit 82 cancels the management of the transmission device 64 ₁ and the transmission device 64 ₂ that were previously managed as being in line switching (see 312 in FIG. 6), and goes to the transmission device 64 ₁ and the transmission device 64 ₂ . A request for issuing a fault information collection command to be sent is sent from the line switching control unit 78 to the command issuing unit 7
4 (see 314 in FIG. 6).

The line switching request display unit 70, which is the source of the line switching request, displays the received execution result on its display screen. If the requester for line switching is the reservation operation control unit 76, nothing is done.

By carrying out such a processing, it is possible to suppress the fault information that temporarily occurs during the line switching, and to obtain the correct fault information about the transmission device which is the target of the line switching at the end of the line switching. It becomes possible to display on the monitor screen. In this way, the simple fault information suppression method can be configured.

Next, a case will be described in which fault information is suppressed in consideration of the state information of the pattern table 86 and the network configuration management information of the configuration information storage unit 88. The operation from the start of line switching to the return of the report is the same as when the status information of the pattern table 86 is not added. Therefore, the line suppression command is issued to enter the failure suppression state (see 350 in FIG. 12).

Then, when the failure notification is made by the report to the monitoring device (see 316 in FIG. 6), the state management unit 82
When the content of the report is checked and it is found that the line is being switched (see 318 in FIG. 6), the pattern table 86 and the configuration information storage unit 88 are referred to for determining the relationship between the failure source and the line. Examine and estimate whether or not the failure is a failure that can occur due to line switching (3 in FIG. 6).
24), and the failure information corresponding thereto is the status management unit 8
It is discarded without being reflected in 2 (see 326 in FIG. 6). Also in this case, when the judgment does not apply, the failure information is reflected in the state management table 90 (FIG. 6).
330, 352 in FIG. 12).

By performing the processing of the fault information as described above, the simple fault information suppressing method is different, and the correct fault information can be displayed in real time. In addition,
After the failure information is suppressed, when all the transmission devices subject to line switching have returned responses to the monitoring device and the line switching has been completed at the transmission devices subject to line switching, the collected transmission device fault information will be collected. , Same as the simple fault information suppression method.

(3) Of line operation pattern by polling
Change The polling control unit 72 issues a polling command at a predetermined command issuing interval (for example, 1 minute interval). Therefore, the configuration information storage unit 88 is referenced to search for the transmission device to which the polling command is to be issued next, for example, the transmission device 64 ₁ and the transmission device 64 ₂ in FIG. ₂ (see 400 in FIG. 4). The command issuing unit 74 is requested to issue a polling command for the transmission device (see 402 in FIG. 4). Then, after waiting for the polling command issuing interval (see 404 in FIG. 4), 400 in FIG.
Enter the process.

Upon receiving the polling command issuance request, the command issuing section 74 sends the polling command to the next transmission apparatus, for example, the transmission apparatus 64 ₁ and the transmission apparatus 64 ₂ shown in FIG. Send a polling command.

A transmission device which has received the polling command, for example, the transmission device 64 ₁ and the transmission device 64 of FIG.
₂ adds the pattern information currently in operation to the polling result information (response) and returns it to the monitoring device 50.
A response is a response to an inquiry. Means for sending the response to the monitoring device are conventionally known.
The same applies hereinafter.

This polling result information (polling result information (response) and pattern information currently in operation)
Is notified to the polling control unit 72 and the state management unit 82 via the communication unit 75 and the response / report receiving unit 80. When the status management unit 82 determines that the status notification is based on polling (see 332 in FIG. 7), the status management unit 82 determines the operation pattern of the response returned from the transmission device and the registration operation pattern written in the status management table 90. The comparison is made (see 334 in FIG. 7). If a match is obtained between the patterns, nothing is done (see 336 in FIG. 7), but if they do not match, the state management unit 82 to the line switching control unit 7
Request line switching to 8 The line switching control unit 78 requests the command issuing unit 74 to issue the pattern switching command according to the above description (see 338 in FIG. 7). The command issuing unit 74 sends a pattern switching command to the requesting transmission device via the communication unit 75 to the requesting transmission device. The line switching in the transmission device is collectively performed by the switching pattern designated by the pattern switching command as in the above.
Accordingly, the operation pattern of the transmission device can be matched with the registered operation pattern managed by the monitoring device.

As described above, the line switching is managed by the pattern and the current operation pattern is added to the polling response, so that even if a deviation in the line operation state is recognized between the monitoring device and the transmission device, it can be immediately performed. The operation pattern of the transmission device can be matched with the monitoring pattern (registered operation pattern).

In the case of other status notifications, for example, notification of device startup, test information, etc. (3 in FIG. 7).
39), the status management information about the transmission device or the monitoring device is changed to the notified status management information (FIG. 7).
340).

(4) Reservation Operation Processing The reservation operation control unit 76 performs reservation operation processing according to the processing flows shown in FIGS. 8 and 9.

At the time of reservation operation, the reservation operation control unit 76
Refers to the reservation operation table 84. In the reservation operation table, regular reservation data for weekly circuit switching by day designation and time reservation data for circuit switching at the date and time designated by date and time are registered in advance.

When the reservation operation control unit 76 starts its operation, it refers to the regular reservation data in the reservation operation table 84 and the pattern number and date and time of the regular reservation to be issued next (hereinafter referred to as the first due date data). Is obtained (50 in FIG. 8)
0 (see (1)), the time reservation data of the reservation operation table 84 is referred to, and the pattern number and date and time of the time reservation to be issued next (hereinafter referred to as second due date data) are acquired (see FIG. 8). See (2) of 502).

The first date data and the second date data are compared (see 504 in FIG. 8). In the comparison, if the first due date data is earlier than the second due date data, the pattern number and date and time designated by the first due date are set as the next reservation (see 506 in FIG. 8). On the contrary, the pattern number and date and time designated by the second due date are set as the next reservation (see 508 in FIG. 8).

By doing so, the timer can be started at the closest time before the current time without paying attention to which reservation data is normally used. However, if the first due date data and the second due date data match, the pattern number and date and time specified unconditionally by the second due date data are set as the next reservation. By doing so, when it is desired to change to the operation of the second due date data only at a specific date and time, the operation according to the second due date data from the specific date and time and the operation according to the first due date data are desired. From the date and time, the first date data can be used immediately and the reservation data can be easily changed.

For example, it is assumed that the operation pattern and reservation data registered in advance in the reservation operation table 84 are as shown in FIG. 13A shows an operation pattern, and FIG. 13B shows reservation data. According to this example, switching should occur in the regular reservation pattern 1 at time 10:00 on October 11, but in this example, the time is the same as the time reservation, so the time reservation pattern 3 is used. Switching is performed. Also, Tuesday, October 12
Switching is performed between 18:00 and 22:00 according to the pattern 4 of the regular reservation.

When the reservation process as described above is performed, the reservation process is on standby until the date of the reservation. When the reservation deadline arrives, line switching is performed according to the reservation pattern as described above.

Next, the reservation operation when a plurality of monitoring devices are provided in the network will be described with reference to FIGS. 14, 8 and 9. In such a system configuration, when the reservation operation is started, the monitoring device 180, which has the highest priority and is the master, notifies the other monitoring devices 182 and 184 of the reservation operation start report and the contents of the reservation operation table 84. (Line switching control information) is transmitted. As a result, only the monitoring device 180 has the respective transmission devices 190, 192, 194.
Perform the monitoring function of 196. Also, the master monitoring device 180
When it becomes impossible to perform monitoring by means of, it becomes possible to perform monitoring by a monitoring device having the next highest priority.
It is assumed that the monitoring devices 180, 182 and 184 have lower priorities in the order of reference numbers.

The response / report receiving units 180 of the other monitoring devices 182 and 184 that have received the reservation operation start report and the contents of the reservation operation table 84 notify the status management unit 82 of the reservation operation start report. Update the status management information in the status management table 90 (see FIG. 3),
The contents of the own reservation operation table 84 are updated with the received contents of the reservation operation table 84. The state management unit 82
Further, the reservation operation control unit 76 is notified that the reservation operation is started. With this configuration, each monitoring device starts the reservation operation according to the updated contents of the reservation operation table 84.

No fault has occurred in the network,
When all transmission devices can be monitored, the master switching device 180 issues the line switching command.
That is, the reservation operation control unit 76 of the master that recognizes that the specified time for the reservation operation has come by referring to the reservation operation table 84.
Refers to the master status management table 90 to check whether the self-monitoring device is currently the master (52 in FIG. 8).
0), and when it is known that the master (522, 522 in FIG. 8)
524), if the master monitoring device is capable of monitoring (see 532, 534, 536 in FIG. 9), line switching is performed according to the above description.

Now, a failure occurs in the transmission path 200 in the network as shown in FIG. 14, and the monitoring device 1 which is the master.
80 to transmission devices 192, 19 other than the transmission device 190
4, 196 and the monitoring devices 182, 184 cannot be monitored (see 526 and 528 in FIG. 8).

In this state, the monitoring device 180 as the master performs line switching as usual (526 in FIG. 8).
528). Also, the monitoring devices 182 and 18 that are slaves
4 cannot monitor the master monitoring device 180 via the monitoring lines 199 and 206, respectively, but has a higher priority than the monitoring device 184.
2 enables monitoring, so the monitoring device 18
The control for monitoring by 4 does not do anything (530 in FIG. 8).
reference).

However, the monitoring device 182 having the next highest priority after the priority given to the monitoring device 180
4 and the transmission devices 192, 194, 196 (see 532, 534, 536 in FIG. 9), and the monitoring device 18
The line is switched for reservation operation instead of 0 (see 538 in FIG. 9). On the contrary, if monitoring by the state management unit 82 is impossible (see 534 and 540 in FIG. 89), nothing is done (see 542 in FIG. 9).

Therefore, it is possible to monitor the monitoring device and the transmission device in which the line switching cannot be performed by the master due to the failure of the transmission line, and when the designated time for the reserved operation comes, the line switching can be performed at that time. .

[0081]

As described above, according to the present invention, since the line switching is performed by the line switching pattern, it becomes easy to grasp the line operating mode regarding the line switching and to manage the operation such as the reservation operating function. . There is no need to issue a command for each line, the line switching speed is improved, and line switching can be performed in a short time. Further, even when there is a mismatch in the operation pattern between the monitoring device and the transmission device, the matching process can be performed. Since the temporary failure that occurs at the time of line switching is suppressed, only the actual failure can be reflected in the monitoring state, which contributes to the improvement of reliability in network operation. In addition, it is possible to collect real-time fault information other than a temporary fault that occurs during line switching in real time.

Furthermore, since monitoring is multiplexed by a plurality of monitoring devices arranged in the network, more reliable reservation operation is possible, and stable network operation is possible.

[Brief description of drawings]

FIG. 1 is a principle block diagram of the invention according to claim 2.

FIG. 2 is a diagram showing an embodiment of the invention described in claims 1 to 8;

FIG. 3 is a diagram showing a configuration of a processing unit in the monitoring device.

FIG. 4 is a diagram showing a processing flow of a polling control unit.

FIG. 5 is a diagram showing a processing flow of a line switching control unit.

FIG. 6 is a diagram showing a part of a processing flow of a state management unit.

FIG. 7 is a diagram showing the remaining part of the processing flow of the state management unit.

FIG. 8 is a diagram showing a part of a processing flow of a reservation operation control unit.

FIG. 9 is a diagram showing the remaining part of the processing flow of the reservation operation control unit.

FIG. 10 is a diagram showing a processing flow of pattern switching performed in the transmission device.

FIG. 11 is a diagram showing an example of registration of a pattern table.

FIG. 12 is a diagram showing a collection sequence of line fault information.

FIG. 13 is a diagram showing an example of regular reservation and time reservation.

FIG. 14 is a diagram showing a configuration example of a network having a plurality of monitoring devices.

FIG. 15 is a diagram showing a configuration of a transmission device.

FIG. 16 is a diagram showing a processing flow in a conventional transmission device.

[Explanation of symbols]

2 transmission equipment 4 Transmission device 6 monitoring equipment 8 Command issuance request means 10 Command issuing means 14 monitoring lines 16 Communication means 18 Command receiving means 20 circuit switching means 22 Line switching control means 54 CPU 58 memory 60 Communication interface device 74 Command issuing section 75 Communication unit 78 Line switching control unit 601 monitoring line 614 CPU 616 memory 618 communication device 702 Communication unit 705 Command parser 707 pattern switching control unit 709 card control unit

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H04J 3/14

Claims (8)

(57) [Claims] 1. A line switching method for switching a plurality of lines accommodated between transmission devices in a network under the control of a monitoring device, wherein a plurality of lines are provided for each transmission device prior to the line switching.
It should be applied in each network configuration to be realized.
Set the line switching pattern that indicates the connection status of each line.
Means to send a single line switching command that specifies one of the above multiple line switching patterns from the monitoring device to the transmission device targeted for line switching, and follow the line switching pattern specified by the single line switching command. Fits into the transmission equipment targeted for line switching
The connection status of the line that is
A line switching method characterized by switching according to a definition corresponding to a switching pattern . 2. A line switching device for switching a plurality of lines accommodated between transmission devices (2, 4) under the control of a monitoring device (6), the line switching pattern being provided in the monitoring device (6). Command issuing requesting means (8) for requesting transmission of a single line switching command designating a single line switching command, and a single line switching in response to a request from the command issuing requesting means (8) provided in the monitoring device. A command issuing means (10) for issuing a command, a communication means (16) for sending a single line switching command issued by the command issuing means (10) to the monitoring line (14), and the transmission device (2 , 4), the communication means (1
Command receiving means (18) for receiving a single line switching command transmitted from 6) via the monitoring line (14) and a plurality of lines accommodated in the transmission device (2, 4). Suitable for the line switching means (20) and a plurality of network configurations to be realized.
Line switching pattern that indicates the connection status of each line to be used
Based on the pattern table which defines the emissions, the single line switching command line specified in the switching pattern
A line switching control means (2) for causing the line switching means (20) to switch each of the lines defined correspondingly.
2) A line switching device characterized by being provided with. 3. The line switching method according to claim 1, wherein when there is a difference between the operating line pattern collected from the transmission device and the line pattern managed by the monitoring device, a single line is sent from the monitoring device. A line switching method comprising issuing a switching command to switch the operating line pattern to a line pattern designated by the single line switching command. 4. The line switching method according to claim 1, wherein a temporary line failure that occurs when the line is switched by a single line switching command is suppressed. 5. The line switching method according to claim 1, wherein a temporary line failure that occurs when a line is switched by a single line switching command is suppressed, and is suppressed from a transmission device targeted for line switching after completion of the line switching. A line switching method characterized by collecting line failure information. 6. The line switching method according to claim 1, wherein a line failure that may temporarily occur at the time of line switching by a single line switching command is estimated in response to device configuration information that configures the line, A line switching method, wherein when the line fault matches estimated fault information, the fault information is suppressed. 7. The line switching method according to claim 1, wherein when a designated day of the week on which the line is switched periodically and a designated date on which the circuit is switched at a specific date and time coincide with each other,
A line switching method characterized by issuing a single line switching command with priority given to date specification. 8. The line switching method according to claim 1, wherein a priority is assigned to each of the plurality of monitoring devices provided in the network, and the monitoring device with the highest priority is the same for other monitoring devices. When the line switching control by the monitoring device with high priority cannot be performed, the line switching control of the transmission device that can be monitored by the monitoring device with high priority among the monitoring devices excluding the monitoring device is performed. A line switching method characterized in that