JPH09149097A - Alarm raising device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the device by which occurrence of an initial virtual path remote end reception fault is detected quickly and rationally during alarm detection. SOLUTION: In this device, a period relating to a virtual path remote end reception fault (VP-RDI) occurrence command signal b of a virtual path(VP) is decreased and a transmission command specified number is increased and the device is provided with a 1/2 counter 5 exclusively ORing for controlling the virtual path remote end reception fault (VP-RDI) occurrence and a storage section 3 for 1/2 counter storing 1/2 occurrence control data. While an occurrence period of the virtual path remote end reception fault in a virtual path remote end reception fault occurrence section 4 is selected once per second similarly to the case with a conventional device, after detection of an alarm from a virtual path alarm display signal a, the storage section 3 for 1/2 counter generates and outputs a virtual path remote end reception fault occurrence control section d' required to detect the corresponding initial virtual path remote end reception fault in a short time within 500msec at the maximum.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a virtual path (VP) of a signal path in a transmission system in an asynchronous transfer mode (ATM).
Virtual path alarm display signal (VP
-AIS) to an alarm issuing device which issues a virtual path far end reception failure (VP-RDI) once per second during alarm detection from (AIS).

[0002]

2. Description of the Related Art Conventionally, in this type of alarm issuing device, a virtual path far-end reception failure is issued once per second during alarm detection from a virtual path alarm display signal in a virtual path. .

FIG. 3 is a circuit block diagram showing the basic construction of such a conventional alarm issuing device.

This alarm issuing device is obtained from a virtual path alarm display signal detecting section 1 for inputting a virtual path alarm display signal a representing an abnormality in a virtual path of a transmission system signal path to detect an alarm, and an alarm detection result. The outgoing data for issuing the far-end reception failure (RDI) is stored, and the virtual path far-end reception failure is received according to a specific transmission instruction prescribed number in a predetermined period of the virtual path far-end reception failure issuing instruction signal e. From the virtual path far-end reception failure output control data storage unit 2 that generates and outputs the output control signal d, and from the virtual path far-end reception failure output control data storage unit 2 that receives the virtual path far-end reception failure output control signal d A virtual path far-end reception failure output unit that reads out the output data for each corresponding virtual path and outputs this output data as a virtual path far-end reception failure output signal c. It is made up of the.

The operation of each unit will be described in detail. In the virtual path alarm display signal detection unit 1, the virtual path alarm display signal a is used as the transmission data for generating the far-end reception failure obtained from the alarm detection result. When the alarm based state is changed from the undetected state to the detected state, "1" is written in the corresponding virtual path number bit of the virtual path alarm display signal issuing control data storage unit 2 to change the alarm detected state to the undetected state. "0" is written in the corresponding virtual path number bit of the virtual path alarm display signal issuance control data storage unit 2 when it changes.

As shown in FIG. 4, the virtual path far-end reception failure issuance control data storage unit 2 is a virtual path far-end reception failure issuance instruction signal that appears once per second as a predetermined cycle. The specified number of transmission instructions of e, that is, the virtual path far-end reception failure issue control signal d from the corresponding virtual path number bit of the virtual path far-end reception failure issue control data storage unit 2 at each timing in the section of 0 to 255. Is output.

In the virtual path far-end reception failure issuing unit 4, the data of the virtual path far-end reception failure issuing control signal d output from the corresponding virtual path number bit of the virtual path far-end receiving failure issuing control data storage unit 2. When the value of is "1", the virtual path far-end reception failure issuing signal c of the corresponding virtual path is issued.

Incidentally, as a technique related to an alarm issuing device for issuing such a virtual path far-end reception failure during alarm detection, for example, there is a game alarm transfer method disclosed in Japanese Patent Laid-Open No. 4-165846. To be

[0009]

In the case where the virtual path far-end reception failure is issued by the above-mentioned alarm issuing device, the virtual path far-end reception failure issuance instruction signal which appears once per second as a predetermined cycle. No. of specified transmissions (255 divisions)
Since the virtual path far-end reception failure issuance control data storage unit 2 generates and outputs the virtual path far-end reception failure issuance control signal in accordance with the timing of 1), after an alarm is detected from the virtual path alarm display signal in the virtual path. , It takes a maximum of 1 second until the first virtual path far-end reception failure is issued, and it takes too much time to issue the initial virtual path far-end reception failure, which causes data transmission inside the device. There is a demand for speeding up and rationalization.

The present invention has been made to solve such a problem, and its technical problem is to quickly and rationally issue an initial virtual path far-end reception failure during alarm detection. It is to provide an alarm issuing device.

[0011]

According to the present invention, there is provided a virtual path alarm display signal detecting section for inputting a virtual path alarm display signal indicating an abnormality in a virtual path of a transmission system signal path to detect an alarm, and an alarm detection. The output data for issuing the far-end reception failure obtained from the result is stored, and the virtual path far-end reception failure issue control signal is transmitted in accordance with a specific transmission instruction specified number in a predetermined cycle by the virtual path far-end reception failure issue instruction signal. Generates and outputs the virtual path far-end reception failure output control data storage section and the virtual path far-end reception failure output control data storage section output data for each corresponding virtual path from the virtual path far-end reception failure output control data storage section To the alarm issuing device comprising a virtual path far-end reception failure issuing unit for issuing the output data as a virtual path far-end reception failure issuing signal. There are, for obtaining a 1/2 issue control signals issued cycle of issuing the data as once per 2 times 1 /
2 counters and a 1/2 counter data storage unit for storing 1/2 emission control data included in the 1/2 emission control signal, and further, a virtual path far-end reception failure emission control data storage unit And the 1/2 counter data storage section,
As the virtual path far-end reception failure issuance instruction signal, a signal in which the specified number of transmission instructions is increased in a cycle shorter than a predetermined cycle is input, and the virtual path far-end reception failure issuance unit outputs 1/2
Input the virtual path far-end reception failure issue control signal generated and output separately from the virtual path far-end reception failure issue control signal from the counter data storage unit, and issue an alarm to issue the virtual path far-end reception failure issue issue signal. The device is obtained.

In this alarm issuing device, the 1/2 counter data storage section receives the detection result of the virtual path far-end reception failure issuing instruction signal and the alarm detection result in which the specified number of transmission instructions is increased in a shortened cycle, and then the above-mentioned A separate virtual path far-end reception failure issuing control signal is generated and output to the virtual path far-end reception failure issuing section, and further, the 1/2 counter is created from the 1/2 counter data storage section. Part of the separated virtual path far-end reception failure output control signal and the virtual path far-end reception failure output control signal generated from the virtual path far-end reception failure output control signal are input respectively to 1 / It is preferable that the exclusive OR circuit generates and outputs the two output control signals.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The alarm issuing device of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a circuit block diagram showing the basic configuration of an alarm issuing device according to an embodiment of the present invention.

This alarm issuing device is obtained from a virtual path alarm display signal detection section 1 for inputting a virtual path alarm display signal a representing an abnormality in a virtual path of a transmission system signal path to detect an alarm, and an alarm detection result. While storing the emission data for emitting the far-end reception failure,
A virtual path far-end reception failure issue / emission control data storage unit 2 for generating and outputting a virtual path far-end reception failure issue / emission control signal d in accordance with a specific transmission instruction specified number in a predetermined cycle by the virtual path far-end reception failure / emission instruction signal b; 1/2 counter 5 for obtaining a 1/2 emission control signal f with the emission cycle of the emission data in the virtual path far-end reception failure emission control data storage unit 2 being once every two times, and 1/2 emission control Signal f
1/2 for storing the emission control data included in
In response to the virtual path far-end reception failure output control signal d ′ generated and output by the 2 counter data storage section 3 and the 1/2 counter data storage section 3 equivalent to the virtual path far-end reception failure output control signal d. And a virtual path far-end reception failure issuing section 4 for reading out the outgoing data for each corresponding virtual path from the 1/2 counter data storage section 3 and issuing this outgoing data as a virtual path far-end receiving failure issuing signal c. There is.

In this alarm issuing device, the virtual path far-end reception failure output control data storage section 2 and the 1/2 counter data storage section 3 are used as the virtual path far-end reception failure output instruction signal b in comparison with the conventional one. Input the transmission instruction prescribed number increased (doubled) in a cycle (500 milliseconds) shorter than the predetermined cycle (1 second).

Further, the 1/2 counter data storage section 3 is
The virtual path far-end reception failure issue control signal d is received in response to the detection result of the alarm from the virtual path far-end reception failure issue instruction signal b and the virtual path alarm display signal a in which the specified number of transmission instructions is doubled in a shortened cycle. Separately generates a virtual path far-end reception failure issuing control signal d '[equivalent to the virtual path far-end reception failure issuing control signal d] and outputs it to the virtual path far-end reception failure issuing unit 4.

Further, the 1/2 counter 5 comprises an exclusive OR circuit, and a separate virtual path far-end reception failure issuing control signal d'generated from the 1/2 counter data storage section 3.
And a virtual path far-end reception failure output control signal d generated from the virtual path far-end reception failure output control data storage unit 2.
Input 1 /
2 Output control signal f is generated and output.

The operation of each part will be described in detail.
When the virtual path alarm display signal detection unit 1 changes from an undetected state of an alarm based on the virtual path alarm display signal a to a detected state, as outgoing data for issuing a far-end reception failure obtained from an alarm detection result, , "1" is written to the corresponding virtual path number bit of the virtual path far-end reception failure output control data storage unit 2 and the 1/2 counter data storage unit 3, respectively, to change from the alarm detected state to the undetected state. At this time, the corresponding virtual path number bits of the virtual path far-end reception failure output control data storage unit 2 and the 1/2 counter data storage unit 3 are each “0”.
Write.

As shown in FIG. 2, the virtual path far-end reception failure output control data storage unit 2 and the 1/2 counter data storage unit 3 each have a shortened cycle of 500.
A virtual path far-end reception failure occurrence indication signal b of a virtual path that appears once every millisecond, and the transmission instruction prescribed number doubled, that is, at each timing in each of the two sections 0 to 255, 0 to 255. The virtual path far-end reception failure output control signals d and d'are output from the corresponding virtual path number bits of the virtual path far-end reception failure output control data storage unit 2 and the 1/2 counter data storage unit 3, respectively.

In the virtual path far-end reception failure issuing section 4, the value of the data of the virtual path far-end reception failure issuing control signal d'output from the corresponding virtual path number bit of the 1/2 counter data storage section 3. Is "1", the virtual path far-end reception failure issuing signal c of the corresponding virtual path is issued.

At this time, the virtual path far-end reception failure output control signal output from the corresponding virtual path number bit in the virtual path far-end reception failure output control data storage section 2 and the 1/2 counter data storage section 3. The exclusive OR of the data values of d and d'is taken by the 1/2 counter 5, and the result is set as the 1/2 output control signal f to 1 in the corresponding virtual path number bit of the 1/2 counter data storage unit 3. / 2 Write as output control data.

That is, in this alarm issuing device, as described above, the 1/2 counter data storage unit 3 outputs the virtual path far-end reception failure issuing instruction signal b of the virtual path that appears once every 500 milliseconds. Since the virtual path far-end reception failure output control signal d ′ is generated and output to the virtual path far-end reception failure output unit 4 at a timing according to the increased transmission instruction specified number, an alarm from the virtual path alarm display signal a is generated. After the detection, the data transmission of the virtual path far-end reception failure generation control signal d ′ required for issuing the initial virtual path far-end reception failure is performed 50 times.
It can be accelerated in a short time within 0 milliseconds.

Further, in the case of this alarm issuing device, the 1/2 counter 5 outputs from the corresponding virtual path number bit of the virtual path far end reception failure issuing control data storage section 2 and the 1/2 counter data storage section 3. The virtual output far-end reception failure issuance control signals d and d'are exclusive OR'ed with the data value and the 1/2 virtual data is stored in the corresponding virtual path number bit of the 1/2 counter data storage unit 3 By writing the data as data, the data storage unit 3 for the 1/2 counter is detected while the virtual path alarm display signal detection unit 1 is detecting an alarm.
The virtual path far-end reception failure issuing control signal d'having data values "1" and "0" is repeatedly sent from the virtual path far-end reception failure issuing unit 4 every 500 milliseconds.

As a result, as in the case of the conventional apparatus, the virtual path far-end reception failure is output once per second, while the initial virtual path far-end reception failure is generated, that is, the apparatus. Internal data transmission is reasonably speeded up.

[0026]

As described above, according to the alarm issuing device of the present invention, the period relating to the virtual path far-end reception failure issuing instruction signal for the virtual path is shortened to increase the prescribed number of transmission instructions, and 1/2 counter for exclusive OR for path far-end reception failure output control and 1 by this
By providing a 1/2 counter storage unit that stores / 2 transmission / reception control data, the virtual path far-end reception failure generation unit can set the virtual path far-end reception failure generation cycle to 1 as in the conventional case.
After the alarm is detected from the virtual path alarm display signal in the virtual path with the rate of once per second, up to 50
It is possible to generate and output a virtual path far-end reception failure issue control signal required for issuing the corresponding initial virtual path far-end reception failure within a short time of 0 milliseconds, and to speed up data transmission inside the device and Rationalization comes to be measured.

[Brief description of the drawings]

FIG. 1 is a circuit block diagram showing a basic configuration of an alarm issuing device according to an embodiment of the present invention.

FIG. 2 shows the timing of a virtual path far-end reception failure issuance instruction signal input to a part of the alarm issuing device shown in FIG.

FIG. 3 is a circuit block diagram showing a basic configuration of a conventional alarm issuing device.

4 shows the timing of a virtual path far-end reception failure issuance instruction signal input to a part of the alarm issuing device shown in FIG.

[Explanation of symbols]

1 Virtual Path Alarm Indication Signal (VP-AIS) Detector 2 Virtual Path Far End Reception Failure (VP-RDI) Emission Control Data Storage 3 1/2 Counter Data Storage 4 Virtual Path Far End Reception Failure (VP- RDI) issuing section 5 1/2 counter (exclusive OR circuit) a virtual path alarm display signal (VP-AIS) b, e virtual path far end reception failure (VP-RDI) issuing timing instruction signal c virtual path far end Reception failure (VP-RDI) issue signal d, d'Virtual path far-end reception failure (VP-RDI) issue control signal f1 / 2 Issue control signal

Claims (3)

[Claims] 1. A virtual path alarm display signal detection unit for detecting an alarm by inputting a virtual path alarm display signal indicating an abnormality in a virtual path of a transmission system signal path, and a far-end reception failure obtained from the alarm detection result. Virtual path far-end reception failure that stores outgoing data for issuing and generates and outputs a virtual path far-end reception failure output control signal in accordance with a specified number of specified transmission instructions in a predetermined cycle by a virtual path far-end reception failure issue instruction signal. Output control data storage unit, receiving the virtual path far-end reception failure output control signal, read out the output data for each corresponding virtual path from the virtual path far-end reception failure output control data storage unit, the output data An alarm issuing device comprising a virtual path far-end reception failure issuing signal issued as a virtual path far-end reception failure issuing signal, A 1/2 counter for obtaining a 1/2 emission control signal by setting the emission cycle of the data once every two times,
A ½ counter data storage unit for storing ½ output control data included in the ½ output control signal, and further, the virtual path far-end reception failure output control data storage unit and the The data storage unit for 1/2 counter inputs the virtual path far-end reception failure issuing instruction signal in which the specified number of transmission instructions is increased in a cycle shorter than the predetermined cycle, and inputs the virtual path far-end. The reception failure issuing unit inputs the virtual path far-end reception failure issuing control signal generated and output separately from the virtual path far-end reception failure issuing control signal from the 1/2 counter data storage unit to input the virtual path. An alarm issuing device characterized in that it issues a far-end reception failure issuing signal. 2. The alarm issuing device according to claim 1,
The ½ counter data storage unit receives the virtual path far-end reception failure output instruction signal in which the specified number of transmission instructions is increased in the shortened cycle and the separate virtual path far-end reception in response to the alarm detection result. An alarm issuing device, wherein the alarm issuing control signal is generated and output to the virtual path far-end reception error issuing unit. 3. The alarm issuing device according to claim 2,
The ½ counter includes a part of the separate virtual path far-end reception failure output control signal generated from the ½ counter data storage and the virtual path far-end reception failure output control data storage. An alarm issuing device, wherein the alarm issuing device is an exclusive OR circuit that inputs the generated virtual path far-end reception failure issuing control signal and generates and outputs the 1/2 issuing control signal.