JPS62110392A - Decentralized control system - Google Patents

Abstract

PURPOSE:To omit an exclusive control processor by providing a duplex processor that can be used as a call process processor and as a control processor for each load and making presently used system of each processor function as a call processor, and two units of space system function as a control processor. CONSTITUTION:When a processor 8-30 or 8-40 which is functioning as a call process processor stopped its function due to trouble etc., corresponding processor 8-31 or 8-41 takes over the call process, and the faulty processor and a main memory 3-30 or 3-40 are cut off. A control processor controlling device 9-0 detects the trouble of a processor 8-10 and makes a processor 8-21 which is on standby as a control processor of spare system start function as a control processor for present use. Thus, as a processor 8-i0 functions as call processor for each channel network 1-i, and two of processors 8-i0 function as the duplex control processor, the exclusive control processor becomes unnecessary.

Description

[Detailed Description of the Invention] [Summary] In a distributed control type electronic switching system, a duplex processor that can be used as both a call processing processor and a management processor is provided for each load, and the active system of each processor is used as a call processing processor. By making two of the spare systems function as management processors, a dedicated management processor can be omitted.

[Industrial application field]

The present invention relates to a distributed control method that makes it possible to improve the economic efficiency of distributed control electronic exchanges.

Distributed control systems are widely used in storage program controlled electronic exchanges in order to be economically applicable to a wide range of accommodating lines, from small to large capacity.

In a distributed control type electronic exchange, there are multiple sets of call processing processors in charge of call processing for a predetermined number of lines depending on the number of lines accommodated, and the call processing processors perform call processing, maintenance, etc. across the entire electronic exchange. A combination of so-called load distribution and function distribution, in which a common management processor is provided, is mainly adopted.

Telephone exchanges require particularly high reliability, so each call processing processor and management processor has a duplex configuration, with one executing various processes as the active system, and the other standing by as a standby system, in case the active system fails. If it becomes inoperable due to
The standby system immediately continues various processing as the active system.

In this type of distributed electronic switching system, it is strongly desired to reduce the number of processors required in order to improve economic efficiency.

[Conventional technology]

FIG. 3 is a diagram showing an example of a conventional distributed control system.

In FIG. 3, four communication network (NW) 1-i (i is 1 to 4,
Duplicated call processing processors (CPR) 2-io and 2-11 and main memories (MM) 3-io and 3-11 are provided corresponding to the call processing processors 2-io and 3-11, respectively. Common to 10 and 2-11 are duplicated management processors CMPR) 5-0 and 5-1, main storage devices 6-0 and 6-1, and input/output devices 7-0 and 7- such as typewriter devices. 1 is provided.

Each call processing processor 2-10 and 2-11 and main storage device 3-10 and 3-11 has one (for example, 2-
io) is in charge of call processing via lines accommodated in the communication path network 1-i as the active system, and the other (for example, 2-il) is on standby as the standby system.

Management processors 5-0 and 5-1 communicate with each call processing processor 2-i0 and 2-11 via processor bus 4.
one (for example, 5-O) executes common processing and general management for each call processing processor 2-10 and 2-11 as an active system, and the other (for example, 5-1) is a standby system as a standby system. do.

[Problem that the invention seeks to solve]

As is clear from the above description, in a conventional distributed control system, a management processor 5 is provided in addition to the call processing processors 2-io and 2-il, which share call processing occurring in each communication path network 1. Therefore, there was a risk that the economic efficiency of the distributed control type electronic exchange system would be impaired.

[Means for solving problems]

FIG. 1 is a diagram showing the principle of the present invention.

In FIG. 1, a duplex processor 8 that can be used as either the call processing processor 2 or the management processor 5 is provided for each load, and the active system of each processor 8 is used as the call processing processor 2 to handle calls for each load. Two of the standby processors of each processor 8 are used as management processors 5, and all active processors 8 operating as call processing processors 2 are collectively managed.

[Effect]

That is, according to the present invention, a part of the standby processor 8 provided corresponding to each load is used as a management processor, so there is no need to provide a dedicated management processor 5, and the economy of the electronic exchange is improved. performance is greatly improved.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a diagram showing a distributed control system according to an embodiment of the present invention.

In Figure 2, there are 4 sets of communication paths! Duplicated processors (PR) 8- correspond to il 1-i, respectively.
main storage devices 3-i0 and 3-1 that store various data necessary for the processor 8-io or 8-11 to function as a call processing processor;
1 and each processor 8-10 and 8-i
In common to l, control devices 9-0 and 9-1, each of which is duplicated, and an arbitrary processor 8-t.
.

Or main storage devices 6-0 and 6- that store various data necessary for 8-11 to function as a management processor.
1, and input/output devices 7-0 and 7-1, and the management processor 5 shown in FIG. 3 is not provided.

One of the duplexed processors (for example, 8-10) functions as a working call processing processor, and shares call processing occurring in the corresponding communication path network 1-i. that time,
Each processor 8-io stores the data to be stored in the corresponding active main storage device 3-10 also in the backup main storage device 3-11, and
and 3-11 are always kept equal.

On the other hand, the other processor (e.g. 8-il) has a corresponding communication channel network 1-i and main storage devices 3-io and 3-i, respectively.
It has been separated from -11.

The management processor control device 9-0 controls the processor 8-11.
Any one of the processors 8-14 (for example, 8-11) is instructed to function as the current management processor, and connected to the main storage device 6-0 and the input/output device 7-0.

Further, the management processor control device 9-1 is configured to control any one of the remaining processors 8-21 to 8-41 (for example, 8-2
1) is instructed to function as a backup management processor, and connected to the main storage device 6-1 and the input/output device 7-1. Note that the management processor control device 9-0 is the main storage device 6-0.
The storage contents of the main storage device 6-0 are periodically transferred to the management processor control device 9-1, and the management processor control device 9-1 stores the transferred storage contents in the main storage device 6-1. and 6-1 are matched.

The remaining processors 8-31 and 8-41 stand by as spares.

In such a state, if the processor 8-30 or 8-40 functioning as a call processing processor stops functioning due to a failure or the like, the corresponding processor 8-31 or 8-41 switches to the corresponding communication path network 1-3 or 1-4. , and the main storage device 3-31 or 3-41 to take over call processing,
The affected prosensor 8-30 or 8-40 and the main memory 3-30 or 3-40 are disconnected.

Processor 8-1 functioning as a call processing processor
When the processor 8-IO stops functioning, the management processor control device 9-0 detects the failure of the processor 8-IO and transmits a management processor switching instruction to the management processor control device 9-1.

Upon receiving the instruction, the management processor control device 9-1 immediately instructs the processor 8-21, which is on standby as a standby management processor, to start functioning as the active management processor.

On the other hand, the management processor control device 9-0 instructs one of the processors 8-31 and 8-41 that is on standby as a backup to stand by as the backup management processor 5 (FIG. 3), and the main storage device 6-0 and connected to the input/output device 7-0.

As is clear from the above description, according to this embodiment, the processor 8-to functions as a call processing processor for each channel network 1-i, and two of the processors 8-11 are dual management processors. Therefore, a dedicated management processor 5 (FIG. 3) is not required. Even in such a case, the duplication of call processing processors is maintained, and the four management processors 8-11 to 8-41 can be used, so reliability is further improved.

It should be noted that FIG. 2 is only one embodiment of the present invention, and for example, the electronic exchange is not limited to one equipped with the 4 & Il communication path network 1, and many other modifications may be considered. In either case, the effects of the present invention remain the same.

〔Effect of the invention〕

As described above, according to the present invention, in the electronic exchange, a part of the standby processors provided corresponding to each load:
Since it is used as a management processor, there is no need to provide a dedicated management processor, and the economic efficiency of the electronic exchange is greatly improved.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the principle of the present invention, FIG. 2 is a diagram showing a distributed control system according to an embodiment of the present invention, and FIG. 3 is a diagram showing an example of a conventional distributed control system. In the figure, 1 and 1-1 to 1-4 are communication channel networks (N
W), 2-10 to 2-41 are call processing processors (C
PR), 3-10 to 3-41.6-0 and 6-1
is the main memory (MM), 4 is the processor bus, 5-0
and 5-1 is the management processor (MPR), ? -0 and 7-1 are input/output devices (10), 8 and 8-1O to 8-41 are processors (PR), 9-0 and 9-
°l is the 7-kyo industry of the management program! Figure 1 Figure 4 + Lack of anger to attack the tail Figure 1 To the mosquito ゛ 2 Figure

Claims (1)

[Scope of Claims] A plurality of call processing processors (2) that each share call processing for distributed loads, and a management processor (5) that collectively manages all call processing processors (2), each call processing processor (2) and the management processor (
5) is an electronic exchange having a working and standby duplex configuration, respectively, the call processing processor (2) and the management processor (5).
Duplicated processor (8) that can be used for any of )
are provided for each of the loads, the active system of each processor (8) is made to be in charge of call processing for each load as the call processing processor (2), and two of the standby systems of each processor (8) are A distributed control system characterized in that all active processors (8) operating as call processing processors (2) are collectively managed by the dual management processor (5).