JPH06319186A - Secondary alarm output control method - Google Patents

Abstract

PURPOSE:To properly and quickly suppress only the unnecessary alarm information output by sending the alarm output control signal synchronously with a frame, applying the multiplexing/demultiplexing processing to the alarm output control signal in the same manner as each channel data, and controlling the transmission of the alarm information based on the multiplexing/demutiplexing result. CONSTITUTION:If a frame error is detected by a higher-degree group signal transmitting/receiving circuit 101, an alarm output control signal 114 becomes valid synchronously with the erroneous frame and then undergoes the multiplexing/ demultiplexing processing through a time division switching circuit 201 in the unit of channel in the same manner as the received output signal. Then a new alarm output control signal 214 which is synchronous with a transmitted input signal 213 is outputted. If the channel data error of the signal 213 is detected by one of lower-degree group signal transmitting/receiving circuits 401-403, the transmission of the alarm information is stopped based on the validity of the signal 214. Thus the necessity or unnecessity of the alarm output can be instantaneously decided to surely suppress the transmission of the overlapping alarm information that obstructs, the alarm correspondent processing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alarm that may be generated secondarily due to a communication error detected in a digital transmission multiplex system and a secondary alarm output for suppressing a game alarm transfer operation related to this alarm. It relates to a control method.

[0002]

2. Description of the Related Art A digital transmission multiplexing system for multiplexing / demultiplexing channel data between high-speed digital lines is
Conventionally, the structure is as shown in FIG. In the figure, reference numerals 151 and 351 denote high-order group signal transmission / reception circuits that transmit and receive high-order group digital signals via lines.
11 is a received input signal from a game (not shown), 113,
Reference numeral 313 is a reception output signal based on the reception input signals 111 and 311, 211 and 212 are transmission input signals to the game, 11
2, 312 are transmission output signals based on the transmission input signals 211, 212.

These signals are composed of high-order group digital signals having a predetermined frame format composed of a plurality of channels. Further, 116 is game alarm information for each frame which is set to the transmission output signal 112 in the higher order group signal transmission / reception circuit 151 and is transmitted to the game, and when an error is detected in the frame of the reception input signal 111 from the game, for example, the line When the input of the received input signal 111 is lost or out of synchronization due to a failure, or when the receiver of the high-order group signal transmission / reception circuit 151 suffers some failure and the received input signal 111 cannot be normally received in frame units, It becomes effective.

Reference numerals 451 to 453 denote low-order group signal transmission / reception circuits for mutually converting each channel data between a high-order group digital signal and a low-order group digital signal having different frame formats. Reference numeral 412 denotes a game (not shown). No.) is a transmission output / reception input signal, 213 is a transmission input signal to the opposite station, and 411 is a reception output signal from the opposite station. The transmission input signal 213 and the reception output signal 411 have the same configuration as the high order group digital signal described above, and the transmission output / reception input signal 412 is a low order group digital signal having a predetermined frame format including a plurality of channels. Has been done.

Each channel data of these input signals is
By each of the low-order group signal transmission / reception circuits 451 to 453, an output signal having a different frame format is re-stored in a predetermined channel and output. Reference numeral 416 denotes low order group signal transmission / reception circuits 451 to 451 when an error is detected in any channel data of the reception input signal 213 from the game.
At 453, it is the game alarm information for each channel stored in the reception output signal 411.

Reference numeral 251 denotes a time division switch 252 (hereinafter,
TSW) is a time division switching circuit that multiplexes / demultiplexes channel data in a high-order group digital signal, and based on cross-connect map information stored internally in advance, each channel data of reception input signals 113, 313, and 411. The transmission input signals 211, 212, 213
The data is stored again in a predetermined channel of and output.

Reference numeral 501 denotes each signal transmission / reception circuit 451-45.
3, 151, 351 and the low-order group signal transmission / reception circuit 451 according to each alarm information from the time division switching circuit 251.
415, 115, 315, which is an alarm control circuit for controlling the transmission of the game alarm information 416 in ˜453.
And 215 are signal transmission / reception circuits 451 to 4 respectively.
The alarm information is output from 53, 151, 351 and the time division switching circuit 251 when various errors are detected. Reference numeral 502 is a CRT (screen display terminal) for notifying an administrator who manages the digital transmission multiplexing system of an error occurrence in accordance with the alarm information.

Next, as an operation of the conventional digital transmission multiplexing apparatus shown in FIG. 3, a case where different faults occur almost at the same time will be described. Due to this failure, one cannot normally receive the reception output signal 111 due to a failure of the receiving unit of the high-order group signal reception circuit 151, and the other one part of the reception input signal 311 due to a line failure that suddenly occurs. Suppose only the channel data is destroyed.

First, in the high-order group signal transmitting / receiving circuit 151, a failure of the receiving section is detected, and the corresponding frame of the reception output signal 113 has a signal indicating the invalidity of this frame,
For example, an AIS (Alarm Indication Signal) signal in which all data bits are set to "1" (all marks) is stored. Further, in the transmission output signal 112, game alarm information 116 for notifying the game (transmission source) that the corresponding frame was not normally received is set, and an alarm is sent to the alarm control circuit 501. Information 115 is output.

On the other hand, in the high-order group signal transmission / reception circuit 351, even if a part of the channel data of the received input signal 311 is destroyed, if it is normally received as a frame, no error is detected and the game is played. The game alarm information 416 and the alarm information 315 for the alarm control circuit 501 are not output.

The reception output signals 113 and 313 output from the high-order group signal transmission / reception circuits 151 and 351 are input to the TSW 252 of the time division switching circuit 251, and channel units are set in accordance with the cross-connect map information that is internally set in advance. And the transmission input signal 21
It is re-stored in a predetermined channel of 3 and output.

Therefore, in each channel of the transmission input signal 213, predetermined channel data of the reception output signals 113 and 313 output from the high-order group signal transmission / reception circuits 151 and 351 are multiplexed and stored, and the AIS is stored. The reception output signal 113 indicating a signal and the reception output signal 313 in which part of the channel data is destroyed are also stored in the transmission output circuit 213 after being divided for each channel.

When the transmission output signal 213 is converted into the transmission output signal 412 which is a low order group digital signal in the low order group signal transmission / reception circuits 451 to 453, a data error is checked for each channel. In particular, when the above-mentioned failure occurs, the data in the transmission output signal 213 is destroyed by the channel in which the AIS signal is stored due to the receiving section failure of the high-order group signal transmitting / receiving circuit 151 and the sudden line failure. Both channels are detected as a data error.

Since the low-order group signal transmission / reception circuits 451 to 453 can only detect errors based on the consistency of the channel data, in response to the error detection of these channel data, the game is immediately played for each channel in which a data error is detected. The alarm information 416 is set in the reception output signal 411, and the alarm information 415 indicating these channel data errors is output to the alarm control circuit 501 for each channel. Each alarm information 115,415
Is analyzed by the alarm control circuit 501 and displayed on the CRT 502 as an error occurrence status.

Here, with respect to the fault occurring in the receiving section of the high-order group signal transmitting / receiving circuit 151, the high-order group transmitting / receiving circuit 15
1, the game alarm information 116 for each frame has already been returned, and the low-order group signal transmission / reception circuits 451 to 453 are transmitted.
The game alarm information 416 for each channel from 1 to 2 is duplicated, which causes the alarm handling process in the game to be confused.

[0016]

Therefore, in such a conventional digital transmission multiplexing system, in the alarm control circuit 501, based on each alarm information and the cross connect map information stored in the time division switching circuit 251, The game alarm information has already been sent,
That is, the secondary alarm is extracted and the CRT50
The display of the duplicated error occurrence status for 2 is stopped, and a control signal 511 for suppressing the transmission of these secondary alarm information is output to the low-order group signal transmission / reception circuits 451 to 453, so that an unnecessary game is played. The sending of the alarm information 416 was suppressed.

However, since the game alarm information 416 is returned and the abnormality occurrence is displayed on the CRT 502 based on the detection of the channel data error of the transmission output signal 213, the alarm control circuit 501 controls the secondary alarm information transmission suppression. There was a problem that the game alarm information and the abnormality occurrence display were not completely suppressed and were temporarily output without being in time, and the alarm handling process was confused. The present invention is intended to solve such a problem, and an object thereof is to provide a secondary alarm output control method capable of appropriately and promptly suppressing only unnecessary alarm information output.

[0018]

In order to achieve such an object, the secondary alarm output control method according to the present invention comprises:
When a frame error in the input signal received from the line is detected by the high-order group signal transmission / reception circuit, alarm information for the detected error is output, and the alarm output control signal is enabled in synchronization with the frame error period of the received output signal, The time-division switching circuit multiplexes / demultiplexes the received output signal on a channel-by-channel basis to generate a transmission input signal, and the alarm control signal is multiplexed / demultiplexed on a channel-by-channel basis to synchronize with each channel of the transmission output signal. When the alarm output control signal is reconfigured and a channel data error in the transmission input signal is detected by the low-order group signal transmission / reception circuit, alarm information transmission for the detected error is sent based on the validity of the alarm output control signal synchronized with this. It was designed to stop.

[0019]

Therefore, when a frame error is detected by the high-order group signal transmission / reception circuit, the alarm output control signal becomes effective in synchronization with this frame, and the time division switching circuit multiplexes / demultiplexes on a channel basis like the reception output signal. When a new alarm output control signal that has been processed and synchronized with the transmission input signal is output, and the channel data error of the transmission input signal is detected by the low-order group signal transmission / reception circuit, an alarm is generated based on the validity of this alarm output control signal. Information transmission is stopped.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a digital transmission multiplexing system which is an embodiment of the present invention. It should be noted that the same or equivalent parts and signals as those in the above description (FIG. 3) are denoted by the same reference numerals.

In FIG. 1, 101 and 301 are high-order group signal transmission / reception circuits for transmitting / receiving high-order group digital signals via lines. Further, 114 and 314 are reception output signals 11
When the error is detected in the frames of the reception input signals 111 and 311 which are output in synchronization with the alarm transmission control signals 3 and 313, the reception input signals 111 and 311 may be disconnected or out of synchronization due to a line failure, for example. In case of occurrence, or some trouble occurs in the receiving section of the high-order group signal transmission / reception circuits 101, 301, the received input signals 111, 31
When 1 is not normally received, it becomes valid respectively.

Reference numeral 201 denotes a time divisional switch 202 (hereinafter,
It is a time division switching circuit that multiplexes / demultiplexes channel data in a high-order group digital signal by means of TSW), and converts each channel data of the reception input signals 113, 313, and 411 based on the cross-connect map information stored inside. , The transmission input signals 211, 212, and 213 are stored again in a predetermined channel and output, and the alarm transmission control signals 114 and 314 are also multiplexed and similarly output.
The separation processing is performed, and the alarm transmission control signal 214 is generated and output.

Reference numerals 401 to 403 denote low-order group signal transmission / reception circuits for mutually converting each channel data between a high-order group digital signal and a low-order group digital signal having different frame formats. 213
When an error is detected in any of the channel data of, the alarm transmission control signal 21 corresponding to this channel
Based on No. 4, the return setting of the game alarm information 416 for each channel is controlled.

Next, the operation of the present invention will be described with reference to FIG. FIG. 2 is a timing chart showing the relationship between the frame of each high-order group digital signal and the alarm transmission control signal. In the figure, 117, 317, and 217 are one frame of the reception output signals 113, 313, and 213, respectively, and have 63 channels and a frame control overhead (OH) unit. Also 118, 31
Reference numerals 8 and 218 are alarm transmission control signals output in synchronization with these frames.

The frames 117 and 317 are multiplexed / demultiplexed on a channel-by-channel basis in the time division switching circuit 201, and stored again in a predetermined channel of the frame 217. In this case, a of frame 117, that is, channels 1, 2,
And b or channels 25 and 26 are
3 a ′ or channels 11 and 12, and b ′ or channels 15 and 16, respectively, and frame 317, c or channels 33 and 34, are stored in frame 213 c ′ or channels 13 and 14, respectively. At the same time, alarm transmission control signals 118 and 318
Also, it is assumed that each channel is multiplexed / demultiplexed and output as the alarm transmission control signal 214.

When a failure occurs in the receiving section of the high order group signal transmitting / receiving circuit 101 and the reception input signal 111 cannot be received normally, the high order group signal transmitting / receiving circuit 101 returns the game alarm information 116 in the same manner as described above. . At the same time, the frame 117 in which the AIS signal indicating the invalid frame is stored and the alarm transmission control signal 118 indicating that the secondary alarm is suppressed, that is, the game alarm information 116 has been transmitted are output.

On the other hand, channel 3 is caused by a sudden line failure.
The received input signal 311 in which only 3, 34 are destroyed is received by the high-order group signal transmission / reception circuit 301, and a frame error check is performed. In this case, since it is a channel data error and not a frame error, the game alarm information is not transmitted, the alarm transmission control signal is not output, and the frame 317 is output as a data error in the channels 33 and 34. .

The frames 117 and 317 and the alarm transmission control signals 118 and 318 are based on preset cross-connect information, and the time division switching circuit 20.
1, the frame 217 and the alarm transmission control signal 218 are multiplexed / demultiplexed for each channel.

Therefore, channel 11 of frame 217,
12 and channels 15 and 16 store channel data whose data bits are all "1" due to the AIS signal, and channels 13 and 14 store channel data destroyed by a sudden line failure. , An alarm transmission control signal 218 is generated which indicates that the period is synchronized with the channels 11, 12 and 15, 16.

The frame 217 and the alarm transmission control signal 218 are input to the low-order group signal transmission / reception circuits 401 to 403, and the channel data for each channel is checked. In this case, a channel data error is detected in all of the channels 11 to 16, but the alarm transmission control signal 214 causes the channels 11, 12, 15, 16 to be detected.
However, since the alarm output is suppressed, the alarm information 415 to the alarm control circuit 501 and the game alarm information 416 set in the reception output signal 411 are only those corresponding to the channels 13 and 14.

Therefore, the CRT 502 receives the frame error of the frame 117 in the received input signal 111 and the reception based on the alarm information 115 from the high order group signal transmission / reception circuit 101 and the alarm information 415 from the low order group signal transmission / reception circuits 401 to 403. Only the channel data errors of the channels 33 and 34 of the frame 317 in the input signal 311 are displayed.

On the other hand, for the game on the high-order group signal transmission / reception circuit 101 side, the game alarm information 116 corresponding to the frame is transmitted.
And to the game on the high-order group signal transmitting / receiving circuit 310 side, only the game alarm information 416 corresponding to the channel is returned.

[0033]

As described above, according to the present invention, when a frame error is detected in a received input signal, an alarm output control signal is sent in synchronization with the frame,
This is multiplexed / demultiplexed like each channel data, and the sending of alarm information is controlled based on this, so it is possible to send the alarm information without delaying the error detection only when the sending of the alarm information is unnecessary. Quickly deterred.

Therefore, in the secondary alarm output control method in the digital transmission multiplexing system for multiplexing / separating the channel data between the high-speed digital lines, it is necessary to output the alarm even if a plurality of sudden failures occur. It is possible to immediately determine the occurrence of the alarm, and it is possible to accurately suppress the transmission of the duplicate alarm information that hinders the alarm handling process, which is a special effect.

[Brief description of drawings]

FIG. 1 is a block diagram of a digital transmission multiplexing system according to an embodiment of the present invention.

FIG. 2 is a timing chart showing a relationship between a frame of each high-order group digital signal and an alarm transmission control signal.

FIG. 3 is a block diagram of a conventional digital transmission multiplexing system.

[Explanation of symbols]

 101,301 Higher-order group signal transmission / reception circuit 111,311 Reception input signal 113,313 Reception output signal 114,214,314 Alarm transmission control signal 116 416 Game alarm information 117,217,317 Frame 118,218,318 Alarm transmission control signal 201 Division switching circuit 202 Time division switch (TSW) 213 Transmission input signal 401-403 Low-order group signal transmission / reception circuit 501 Alarm control circuit 502 CRT

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[Procedure amendment]

[Submission date] April 1, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction content]

[0018]

In order to achieve such an object, the secondary alarm output control method according to the present invention comprises:
When a frame error in the input signal received from the line is detected by the high-order group signal transmission / reception circuit, alarm information for the detected error is output, and the alarm output control signal is enabled in synchronization with the frame error period of the received output signal, The time-division switching circuit multiplexes / demultiplexes the received output signal on a channel-by-channel basis to generate a transmission input signal, and the alarm control signal is multiplexed / demultiplexed on a channel-by-channel basis to synchronize with each channel of the transmission output signal. When the alarm output control signal is reconfigured and a channel data error in the transmission input signal is detected by the low-order group signal transmission / reception circuit, alarm information transmission for the detected error is sent based on the validity of the alarm output control signal synchronized with this. It was designed to stop. Also high
The next group signal transmission / reception circuit can receive the reception input signal normally.
If not, the game alarm information will be returned at the same time.
Is paired with a frame containing a signal indicating an invalid frame.
With the alarm transmission control signal indicating that the station alarm information has been returned
Is output, and only a specified channel due to a sudden line failure
If is destroyed, the game alarm information will not be returned,
Moreover, the alarm transmission control signal is not output, and the channel
The frame with the data error remains is output and these frames are
Alarm and alarm sending control signals are preset
Channel by time division switching circuit by cross connect information
Each unit is multiplexed and demultiplexed.

Claims (1)

[Claims] 1. When a frame error of a received input signal from a line is detected by a high-order group signal transmission / reception circuit, alarm information for the detected error is output, and
The alarm output control signal is validated in synchronization with the frame error period of the received output signal, and the time division switching circuit multiplexes / demultiplexes the received output signal on a channel-by-channel basis to generate a transmission input signal and at the same time controls the alarm. When the alarm output control signal synchronized with each channel of the transmission output signal is reconstructed by multiplexing / demultiplexing the signal on a channel-by-channel basis and a channel data error of the transmission input signal is detected by the low-order group signal transmitting / receiving circuit. The secondary alarm output control method for a digital transmission multiplexing system, wherein the alarm information transmission for the detected error is stopped based on the validity of the alarm output control signal synchronized with this.