JPS58182359A - Self-control system switching system of electronic exchange - Google Patents

Abstract

PURPOSE:To reduce the maintenance time and to prevent instability due to such as disturbance and failure, by executing a diagnostic test to a waiting system device, and changing the system constitution through the result of the test, when a system switching cause takes place, in a duplex device having a self-control system switching function. CONSTITUTION:Central processing units 6-1, 6-2 are operated synchronously while comparing the operation with each other, and when the operation is dissident, the self-diagnosis is done and a system in failure is disconnected, remote station control sections 4-1, 4-2 at the master station side are decided about their operating system and waiting system via a system constitution managing section 5 by the control from the operating system central processing unit, the sections receive control information from the central processing unit of the operating system, and only the control section of the remote station at the master station of the operating system is communicated with the remote station through a communication line 7. Control sections 3-1, 3-2 of the remote station 1 decide the operating and waiting system by self-control and the operating and waiting systems are changed over with the control from the master station.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an autonomous system switching system for an electronic exchange, and particularly to a system switching system for a duplex device having an autonomous system switching function.

Electronic exchanges generally have a redundant configuration for their control systems as a measure against failures, with one operating system operating as an active system and the other as a standby system, and when a failure occurs in the active system, the active system is switched and the failure is resolved. The central processing unit manages the system configuration so as to disconnect the system that caused the problem. However, in devices where there is a possibility that control from the central processing unit may be interrupted due to failure or disturbance of the communication line, such as a remote station controlled by a master station that accommodates subscribers in remote areas, concentrates the lines, and connects them to the master station. Since the system may be interrupted due to a failure in the operating system, it is necessary to perform system switching autonomously. Conventionally, in such equipment, the operating system is occasionally switched by line and master station control to confirm the normality of the equipment, but when a system switching factor occurs,
The operating system is switched unconditionally. However, the normality of the standby system at the time of system switching is uncertain, and communication interruptions are often caused by communication lines, so when switching unconditionally as in the past, disturbances on the communication line may occur. When there was a temporary interruption due to this, the new operating system would not operate properly, and there was a possibility that operations could not be resumed even if the communication line was restored, even though there was normal equipment.

The present invention solves the above-mentioned drawbacks and performs switching after confirming the normality of the switching system in order to recover from poor performance, which requires time for maintenance.
It also provides a useful switching method in remote stations that are unstable due to disturbances, obstacles, etc.

According to the present invention, the electronic exchange has an autonomous system switching function.
An autonomous system switching system for electronic exchanges is obtained in which when a system switching factor occurs in a multiplex system, a diagnostic test is executed on the standby system equipment, and the system configuration is changed based on the result.

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a book diagram of one embodiment of the present invention. In FIG. 1, 1 is a remote station control unit, 2 is a master station control unit, 3-1 and 3-2 have a redundant configuration of remote station control units, 4-1 and 4-
2 is a duplex configuration of the remote station control unit on the parent station side, 5 is a system configuration management unit, 6-1 and 6-2 are duplex configurations of the central processing unit,
7 indicates a communication line.

Next, the operation shown in FIG. 1 will be explained. Remote station 1 is master station 2
The system accommodates subscribers in remote locations, concentrates their lines, and connects them to the master station under the control of the central processing unit 6-1 or 6-2. -1 or 4-2 and then through the communication line 7. Each device has a duplex configuration, with one being an operating system and the other being a standby system.
It is operated as a system, and only the operating system exerts control over other devices.

The central processing units 6-1 and 6-2 operate in synchronization while comparing their operations, and when their operations become inconsistent, each performs a self-diagnosis and operates to isolate the abnormal system. and the master station side remote station control units 4-1 and 4-2.
The active system and the standby system are determined by the control from the active system central processing unit through the system configuration management unit 5, and each receives control information from the active system central processing unit and is controlled by the active system main station side remote station control unit. It only communicates with remote stations through communication lines.

Control units 3-1 and 3-2 of remote station 1 autonomously operating system,
Although the standby system has been determined, it is also possible to switch between the operating thread and the standby system under control from the master station, and the normality of both systems is usually checked by switching systems from time to time.

If a failure occurs in the active system, or a system switchover factor occurs such as a loss of communication with the master station, the active system performs a diagnosis on the standby system and determines whether or not to perform system switchover based on the results. It works to determine which. In addition, if an important failure occurs in the operating system, the system operates to execute subsystem switching without going through the above procedure.

As described above, according to the present invention, it is possible to restore the system without further deterioration by confirming the normality of the switching system before switching, which requires time for maintenance, and also causes disturbances, failures, etc. This is effective in remote stations that are unstable due to

[Brief explanation of the drawing]

FIG. 1 is a diagram illustrating an embodiment of the present invention. 1... Remote station control unit, 2... Master station control unit, 3-1 and 3-2... Remote station control unit duplex configuration, 4-1 and 4-2... Configure the master station side remote station control unit 2, 5... System configuration management unit, 6-1
and 6r2... Song center l! F! 7/ Ward

Claims (1)

[Claims] In a duplexing device having an autonomous system switching function of an electronic exchange, when a system switching factor occurs, a diagnostic test is executed on a standby system device, and the system configuration is changed based on the result. Autonomous system switching method.