JPS62232042A - Fault detecting system - Google Patents

Abstract

PURPOSE:To heighten inspection the ability to the normality of information channel connecting a duplex device and a unitizing device by verifying information in two time slots for normality confirming signal in an operating system and a standby system. CONSTITUTION:A duplex device 1a has an operating system duplex device 1b as the standby system, and normality confirming signal adding circuits 16a, 16b and normality confirming signal examining circuits 17a, 17b are provided in these duplex devices 1a, 1b respectively. Controlling information 14 from a controller in the unitizing device 2 is transferred to selection circuits 6a, 6b, and normality confirming signals (A) 9a, 9b and a normality confirming signal (B) 12 are inserted to it and transferred to duplex devices 1a, 1b as return paths 4a, 4b of an information channel. Time slots (A), (B) 18a, 18b for normality confirming signal in the return paths of information channel are inspected respectively by normality confirming signal examining circuits 17a, 17b in the duplex devices 1a, 1b.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a failure detection system, and in particular, a fault detection method in which a duplexed higher-level device consisting of an operating system and a standby system is time-division multiplexed with a lower-level device that does not have a redundant configuration. The present invention relates to a failure detection method in a system in which the operating system and the standby system of a higher-level device are connected by an information path and send and receive υ information to and from the lower-level device through the outbound and return paths of the information path.

[Conventional technology]

Conventional fault detection methods of this type include one time slot for a normality confirmation signal in the time-division multiplexed information path, and a signal is assigned to the operating system of the duplexing device and transmitted by the outgoing path of the operating system. The method is to return the data to both the operating system and the standby system via the lower level [1], or the method described above is adopted during normal operation of the system, and the same time slot described above is used during system diagnosis, and the system is returned to the operating system. There is a system that has a system in which items transferred by the outgoing route of the operating system assigned to the operating system are returned to the return route of the operating system, and items transferred by the outgoing route of the backup system assigned to the backup system are returned to the return route of the backup system. It was considered.

[Problem that the invention seeks to solve]

In the conventional fault detection method described above, in normal times, the normality confirmation signal given by the operating system is verified in both the operating system and the backup system, so the route from the backup system of the duplexing device to the sea duplexing device is One point was that no faults were detected, and the resolution of fault detection on the outbound and return routes of the operating system and the return route of the backup system was low.

[Means for solving problems]

The fault detection method of the present invention provides first and second time slots for normality confirmation signals in a time-division multiplexed information path, and the first time slot is assigned to the operation system of the duplexing device. , the data transferred by the outgoing route of the operating system is returned to both the operating system and the standby system via the lower device, and the second time slot is given to the operating system and transferred by the outgoing route of the operating system. Items are sent back to the return route of the operating system, and items that are assigned to the backup system and transferred by the outbound route of the backup system are returned to the return route of the backup system. 1st and 2nd 2 above
The present invention includes means for verifying information within the two normality confirmation signal time slots.

Function] In the present invention, one of the two time slots for normality confirmation signals provided in the time-division multiplexed information path between the duplexing device and the duplexing device is used for the operation system of the duplexing device. The time slots assigned to the operating system and transferred by the outbound route of the operating system are returned to both the operating system and the standby system via the lower IT, and the other time slots are assigned to the operating system and transferred by the outward route of the operating system. is returned to the return route of the operating system, and those assigned to the backup system and transferred by the outbound route of the backup system are returned to the return route of the backup system. ! Verify the information in the E confirmation signal timeslot.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

The figure is a block diagram showing one embodiment of the present invention.

In the figure, Ia and 1b indicate duplex g&R, and in this embodiment, duplex equipment (jtla is the operation system, duplex equipment 1
b is a standby system, and each of these duplexing devices 1a.

Is each normality in 1b? il [! Signal addition circuit 16a
.

tab and normality confirmation signal inspection circuits 17a, 17b
is provided. i5a and 15b are control information paths.

Reference numeral 2 denotes a duplexing device, and information paths 3a are connected between the duplexing devices 1a and ib and this duplexing device, respectively.

It is connected to the information path return path 4a, the information path outbound path 3b, and the information path return path 4b.

This -duplexing device +t2 includes normality confirmation signal extraction circuits (A) 5a, 5b, selection circuits 6a, 6b, operation system selection circuit T, and normality i confirmation signal extraction circuit (B).
)8. 9a + 9b indicates normality confirmation signal, 10a, 10b, 11.13.1
4 indicates control information, and 12 indicates a normality confirmation signal (B).

FIG. 2 is a diagram showing the structure of signal time slots in the control information in FIG. 1.

In this FIG. 2, 18a shows the time slot (4) for the normality confirmation signal, and 18b shows the normality confirmation signal time slot (4).
This shows the u signal time slot (B). 0, 1, 2, 16.30° 31 indicate data time slots, and data time slots O and 16 correspond to normality confirmation signal time slots 18a+18b, respectively.

Next, the operation of the embodiment shown in FIG. 1 will be explained with reference to FIG. 2.

First, in the duplexing devices 1a and 1b, the control information path 15a is
, 15b, the time slot for the normality confirmation signal, (
B) A normality confirmation signal is sent to 18a and 18b (see FIG. 2) and transferred to the outgoing information paths 3a and 3b.

On the other hand, in the -multiplexing device 2, the information paths 3a, 3b
Inside) Normality confirmation signal inspection circuit prisoner 5a.

5b! The information on the time slot circulation for the normality confirmation signal shown as 18a in FIG. 4a.

4b is inserted into the normality confirmation signal time slot cA>18a.

Next, control information 1 (la, 10b is the operation system selection circuit 7
Therefore, only operation-related information is transferred as control information 11. Then, the normality confirmation signal extraction circuit (B) 8 which receives this control information 11 as input extracts the information in the normality confirmation signal time slot (B) shown as 18b in FIG. 2, and confirms the normality. The signal (B) 12 is transferred to the selection circuits 6a and 6b, respectively, and the return information path 4a and 4
Time slot for normality confirmation I language of b (B) 18
inserted into b. The control information 13 from the normal a confirmation signal extraction circuit (B) 8 is transferred to a control device (not shown) in the multiplexing device 2.

Further, control information 14 from a control device (not shown) in this multiplexing device 2 is transferred to selection circuits 6a and 6b, and a normality confirmation signal (A) 9a is generated in the above-described procedure.

9b and a normality r4 recognition signal (B) 12 are inserted, and transferred to the duplexing devices 1a, 1b as information paths 4a, 4b. In this duplex system [1a, 1b, normality confirmation signal test circuits 17a, 17b are used]
1 Time slot for normality m signal in return path 4m, 4b cA), (B) 18a, 18b
are each examined.

〔Effect of the invention〕

As explained above, according to the present invention, two time slots for normality confirmation signals are provided in the time-division multiplexed information path, and one time slot is assigned to the operation system of the duplexing device. What was transferred on the outward route is returned to both the operating system and the standby system via the lower device, and the other time slots are given to the operating system, and what was transferred on the outward route of the operating system is sent to the return route of the operating system. What was sent to the backup system and transferred by the outbound route of the backup system is returned to the return route of the backup system, and is transferred to both the operating system and the backup system of the duplexing device.
By providing a means to verify the information in the two normality confirmation signal time slots, it can be combined with a duplex device! ! This has the effect of improving the normality inspection performance of the information path that connects the equipment. In other words, it is possible to constantly monitor the outbound and return routes of the driving system and the outbound and return routes of the backup system, and the resolution of failure detection can be increased by 1 for each information unit, so the practical effect is extremely simple. be.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and the second factor is a diagram showing the signal time slot structure in the control information in FIG. 1. 1a...e-duplexing device operation system, 1b...duplexing device backup system, 2...-duplexing device, 3a, 3b...
...Information route outbound, 4a, 4b...Fist-Information route return,
5a, 5b... Normality confirmation signal extraction circuit (
4), 6a, 6b... selection circuit, 7...
- Operation system selection circuit, 8... Normality confirmation signal extraction circuit (E), 16a, 16b... Normality confirmation signal addition circuit, 17a, 17b... Φ Normality confirmation signal inspection circuit.

Claims (1)

[Claims] A duplexed higher-level device consisting of an operating system and a standby system is connected to a lower-level device that does not have a redundant configuration by a time-division multiplexed information path, and both the operating system and the standby system of the upper-level device are connected to the lower-level device, respectively. In a method of transmitting and receiving information through an outbound and a return path of an information path, first and second time slots for normality confirmation signals are provided in the time-division multiplexed information path, and the first time slot is The time slot assigned to the operating system of the duplexing device and transferred by the outbound route of the operating system is returned to both the operating system and the standby system via the lower-level device, and the second time slot is assigned to the operating system and transferred to the operating system. What was transferred by the outbound route of the operating system is returned to the return route of the operating system, and what was assigned to the backup system and transferred by the outbound route of the backup system is returned to the return route of the backup system, A fault detection system characterized by comprising means for verifying information in the first and second normality confirmation signal time slots in both the system and the backup system.