JP3156750B2 - Alarm issuing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a virtual path (VP) of a signal path in a transmission system using an asynchronous transfer mode (ATM).
Path alarm display signal (VP
The present invention relates to an alarm issuing device that issues a virtual path far-end reception failure (VP-RDI) once per second during detection of an alarm from an 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 a second during alarm detection from a virtual path alarm display signal in a virtual path. .

FIG. 4 is a circuit block diagram showing the basic configuration 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 indicating an abnormality in a virtual path of a transmission system signal path and detecting an alarm, and an alarm detection result. In addition to storing outgoing data for issuing a far-end reception failure (RDI), receiving a virtual-path far-end reception failure issue instruction signal e and receiving a virtual-path far-end reception failure in accordance with a specified transmission instruction specified number in a predetermined period of time. A virtual path far-end reception failure transmission control data storage unit 2 that generates and outputs a transmission control signal d, and a virtual path far-end reception failure transmission control data storage unit 2 that receives the virtual path far-end reception failure transmission control signal d. A virtual path far-end reception failure issuing unit that reads out the emission data for each corresponding virtual path, and issues this emission data as a virtual path far-end reception failure emission signal c It is made up of the.

More specifically, the operation of each unit will be described. In the virtual path alarm display signal detection unit 1, the virtual path alarm display signal a is output as data for generating a far-end reception failure obtained from the alarm detection result. When the state changes from the undetected state of the alarm based on the detected state to the detected state, "1" is written to the corresponding virtual path number bit of the virtual path alarm display signal issuance control data storage unit 2, and the alarm detected state is changed to the undetected state. Then, "0" is written to the corresponding virtual path number bit of the virtual path alarm display signal issuance control data storage unit 2.

As shown in FIG. 5, the virtual path far-end reception failure occurrence control data storage unit 2 stores a virtual path far-end reception failure occurrence instruction signal of a virtual path that appears once every second as a predetermined period. e, the specified number of transmission instructions, that is, the virtual path far end reception failure generation control signal d from the corresponding virtual path number bit of the virtual path far end reception failure generation control data storage unit 2 for each timing in the section of 0 to 255. Is output.

[0007] The virtual path far-end reception failure issuing unit 4 outputs the data of the virtual path far-end reception failure occurrence control signal d output from the corresponding virtual path number bit of the virtual path far-end reception failure occurrence control data storage unit 2. Is "1", a virtual path far end reception failure signal c of the corresponding virtual path is issued.

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

[0009]

In the case of the occurrence of a virtual path far-end reception failure by the above-mentioned alarm issuing device, a virtual path far-end reception failure generation instruction signal of a virtual path that appears once per second as a predetermined period. Specified number of transmissions (255 divisions)
Since the virtual path far end reception failure occurrence control data storage unit 2 generates and outputs the virtual path far end reception failure occurrence control signal in accordance with the timing of the above, after the alarm is detected from the virtual path alarm display signal on the virtual path, It takes a maximum of one second until the first virtual path far-end reception failure is issued, and it takes too much time to generate an initial virtual path far-end reception failure, and the data transmission inside the device is difficult. There is a demand for speeding up and streamlining.

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

[0011]

According to the present invention, a virtual path alarm display signal detector for inputting a virtual path alarm display signal representing an abnormality in a virtual path of a transmission signal path and detecting an alarm, and an alarm detector In addition to storing the emission data for issuing the far-end reception failure obtained from the result, the virtual path far-end reception failure emission control signal is generated according to a specified number of transmission instructions specified in a predetermined cycle by the virtual path far-end reception failure emission instruction signal. A virtual path far-end reception failure issue control data storage unit for generating and outputting the virtual path far-end reception failure emission control signal, And a virtual path far-end reception failure issuing unit that issues the emission data as a virtual path far-end reception failure emission signal. There are, for obtaining a 1/2 issue control signals issued cycle of issuing the data as once per 2 times 1 /
2 counter, 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 data storage unit for the カ ウ ン タ counter,
A virtual path far-end reception failure issuing instruction signal is input in which the specified number of transmission instructions is increased in a cycle shorter than a predetermined cycle, and
An alarm issuance in which a virtual path far-end reception failure emission control signal generated and output separately from the virtual path far-end reception failure emission control signal from the counter data storage unit is input to generate a virtual path far-end reception failure emission signal. A device is obtained.

In this alarm issuing device, the 1/2 counter data storage receives the virtual path far-end reception failure issuing instruction signal and the alarm detection result in which the specified number of transmission instructions has been increased at a reduced period and receives the alarm detection result. A separate virtual path far-end reception failure generation control signal is generated and output to the virtual path far-end reception failure generation unit. Further, the カ ウ ン タ counter is generated from the カ ウ ン タ counter data storage unit. A part of the separate virtual path far-end reception failure emission control signal and the virtual path far-end reception failure emission control signal generated from the virtual path far-end reception failure emission control data storage unit. It is preferable that the exclusive OR circuit generates and outputs the two emission control signals.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The following is a detailed description of an alarm issuing device of the present invention with reference to 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.

This alarm issuing device is obtained from a virtual path alarm display signal detecting section 1 which receives a virtual path alarm display signal a indicating an abnormality in a virtual path of a transmission signal path and detects an alarm, and an alarm detection result. While storing the emission data for issuing the far-end reception failure,
A virtual path far-end reception failure issue control data storage unit 2 that generates and outputs a virtual path far-end reception failure emission control signal d according to a specified transmission instruction specified number in a predetermined cycle by the virtual path far-end reception failure emission instruction signal b; A 1/2 counter 5 and a 1/2 emission control for obtaining a 1/2 emission control signal f by setting the emission cycle of the emission data in the virtual path far-end reception failure emission control data storage unit 2 to once every two times. Signal f
For storing the 1/2 emission control data contained in
In response to the 2 counter data storage unit 3 and the virtual path far end reception failure generation control signal d ′ generated and output by the 1/2 counter data storage unit 3 equivalent to the virtual path far end reception failure generation control signal d. A virtual path far-end reception failure issuing unit 4 for reading out the emission data for each corresponding virtual path from the 1/2 counter data storage unit 3 and issuing the emission data as a virtual path far-end reception failure emission signal c. I have.

In this alarm issuing device, the virtual path far end reception failure occurrence control data storage unit 2 and the 1/2 counter data storage unit 3 are compared with the conventional one as the virtual path far end reception failure occurrence instruction signal b. The one in which the specified number of transmission instructions has been increased (doubled) in a cycle (500 milliseconds) shorter than the predetermined cycle (1 second) is input.

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

Further, the 1/2 counter 5 comprises an exclusive OR circuit, and generates a separate virtual path far-end reception failure occurrence control signal d 'generated from the 1/2 counter data storage unit 3.
And a virtual path far-end reception failure occurrence control signal d generated from the virtual path far-end reception failure emission control data storage unit 2.
Are input to each other and include 1/2 emission control data.
It generates and outputs two emission control signals f.

The operation of each unit will be specifically described.
The virtual path alarm display signal detection unit 1 is configured to output, as the output data for generating a far-end reception failure obtained from the alarm detection result, when an alarm based on the virtual path alarm display signal a changes from an undetected state to a detected state. Then, "1" is written into the corresponding virtual path number bit of the virtual path far-end reception failure occurrence control data storage unit 2 and the 1/2 counter data storage unit 3 to change from the alarm detection state to the undetected state. At this time, the corresponding virtual path number bits of the virtual path far-end reception failure occurrence control data storage unit 2 and the 1/2 counter data storage unit 3 are set to "0"
Write.

As shown in FIG. 2, each of the virtual path far-end reception failure occurrence control data storage unit 2 and the 1/2 counter data storage unit 3 has a shortened cycle of 500.
The specified number of doubled transmission instructions of the virtual path far-end reception failure issuing instruction signal b of the virtual path that appears once every millisecond, that is, for each timing in each of the two sections 0 to 255 to 0 to 255 The virtual path far-end reception failure issue control signals d and d 'are output from the corresponding virtual path number bits in the virtual path far-end reception failure issue 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 data value of the virtual path far end reception failure occurrence control signal d 'output from the corresponding virtual path number bit of the 1/2 counter data storage section 3. Is "1", a virtual path far end reception failure signal c of the corresponding virtual path is issued.

At this time, the virtual path far end reception failure occurrence control signal output from the corresponding virtual path number bit in the virtual path far end reception failure occurrence control data storage unit 2 and the 1/2 counter data storage unit 3 The exclusive OR of the data values obtained by d and d 'is calculated by a 1/2 counter 5, and the result is used as a 1/2 output control signal f in the corresponding virtual path number bit of the 1/2 counter data storage unit 3 by 1 Write as / 2 emission control data.

That is, in this alarm issuing device, referring to the timing charts of the processing signals in the respective units shown in FIG. 1 and FIG. The virtual path far-end reception failure issuing unit 4 controls the virtual path far-end reception failure emission unit 4 at a timing according to the increased transmission instruction number of the virtual path far-end reception failure emission instruction signal b of the virtual path that appears each time. Since the signal d 'is generated and output, the virtual path alarm display signal a
, After detecting the alarm from the virtual path far end reception failure generation control signal d ′ required for the generation of the initial virtual path far end reception failure.
Can be speeded up in a short time of 500 milliseconds or less.

Further, in the case of this alarm issuing device, the data storage unit 2 for the virtual path far-end reception failure issuance control and the data storage unit for 1/2 counter 3 store the data value in advance at the timing shown in FIG. 1 "and" 0 ", and the corresponding virtual path numbers of the virtual path far-end reception failure occurrence control data storage unit 2 and the 1/2 counter data storage unit 3 by the 1/2 counter 5. The exclusive OR of the data values based on the virtual path far-end reception failure occurrence control signals d and d 'output from the bits is added to the corresponding virtual path number bit of the 1/2 counter data storage unit 3 as 1 /.
2 By writing as the outgoing control data, the virtual path alarm display signal detector 1 detects 1 /
The data value is set to “1” every 500 milliseconds from the counter data storage unit 3 to the virtual path far-end reception failure issuing unit 4,
It has a function of repeatedly transmitting the virtual path far-end reception failure issue control signal d 'set to "0".

As a result, the initial generation of the virtual path far-end reception failure, that is, the apparatus, while maintaining the generation cycle of the virtual path far-end reception failure once per second as in the case of the conventional device, Internal data transmission is reasonably quick.

[0026]

As described above, according to the alarm issuing apparatus of the present invention, the period related 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, 1/2 counter performing exclusive OR for controlling path far-end reception failure occurrence and 1
By providing a storage unit for a 1/2 counter for storing the / 2 emission control data, the generation cycle of the virtual path far end reception failure in the virtual path far end reception failure emission unit is set to 1 as in the conventional case.
After the alarm is detected from the virtual path alarm indication signal in the virtual path at a rate of once per second, a maximum of 50
It is possible to generate and output a virtual path far end reception failure generation control signal required for the generation of the corresponding initial virtual path far end reception failure in a short time within 0 millisecond, thereby speeding up data transmission inside the device and The rationalization will 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 one embodiment of the present invention.

FIG. 2 shows the timing of a virtual path far-end reception failure generation instruction signal input to a part of the alarm generation device shown in FIG. 1;

FIG. 3 is a timing chart showing a processing signal in each section of the alarm issuing device shown in FIG. 1;

FIG. 4 is a circuit block diagram showing a basic configuration of a conventional alarm issuing device.

5 shows the timing of a virtual path far end reception failure generation instruction signal input to a part of the alarm generation device shown in FIG. 4;

[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-ADI) RDI) issuing unit 5 1/2 counter (exclusive OR circuit) a virtual path alarm indication 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) output signal d, d 'Virtual path far-end reception failure (VP-RDI) emission control signal f 1/2 emission control signal

Claims (3)

(57) [Claims] 1. 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 and detecting an alarm, and detecting a far-end reception failure obtained from the alarm detection result. A virtual path far-end reception fault that stores output data for issuing and generates and outputs a virtual path far-end reception fault emission control signal in accordance with a specified number of transmission instructions specified in a predetermined period by the virtual path far-end reception fault emission instruction signal. Emission control data storage unit, receiving the virtual path far end reception failure emission control signal, reads out the emission data for each corresponding virtual path from the virtual path far end reception failure emission control data storage unit, and reads the emission data. An alarm issuing device comprising: a virtual path far-end reception failure issuing unit that issues 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 period of the data to once every two times,
A 1/2 counter data storage unit for storing 1/2 emission control data included in the 1/2 emission control signal, further comprising: the virtual path far end reception failure emission control data storage unit; The 1/2 counter data storage unit 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 The reception failure issuing unit receives the virtual path far-end reception failure emission control signal generated and output separately from the virtual path far-end reception failure emission control signal from the 1/2 counter data storage unit, and An alarm issuing device for issuing a far-end reception failure issuing signal. 2. The alarm issuing device according to claim 1, wherein
The 1/2 counter data storage unit receives the virtual path far end reception failure occurrence instruction signal in which the specified number of transmission instructions has been increased in the shortened cycle and the alarm detection result, and receives the separate virtual path far end reception. An alarm issuing device for generating a failure issuing control signal and outputting the generated signal to the virtual path far-end reception failure issuing unit. 3. The alarm issuing device according to claim 2,
The カ ウ ン タ counter includes a part of the separate virtual path far end reception failure occurrence control signal generated from the カ ウ ン タ counter data storage unit and the virtual path far end reception failure occurrence control data storage unit. An alarm issuing device, comprising: an exclusive OR circuit that receives the generated virtual path far-end reception failure issue control signal and generates and outputs the 1/2 emission control signal.