JPS6118292A - Interruption control system of electronic exchange - Google Patents

Abstract

PURPOSE:To eptimize the effective use of a processing capability of a central controller by providing a means starting a means executing an interruption request so long as the interruption request exists in an interruption request selection means against the interruption request. CONSTITUTION:If state change is caused in at least one of terminal devices 51- 5N, state change detection sections 611-61N of a terminal controller 6 detect it, commands the generation of interruption request to interruption request generating sections 621-62N, which generate the interruption request and give an output to an interruption request selecting section 63. The selecting section 63 is constituted to select one interruption request with the highest priority among plural interruption requests when they are inputted at the same time. The interruption request selected by the selection section 63 is transmitted to the central controller 1 via an interruption request line l2. The controller 1 responds to the interruption request, interrupts temporarily a program processed at present and transfers the control to a state change processing program of the terminal device 5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an interrupt control system for an electronic exchange using a storage program control system. In particular, it relates to an interrupt control system for a central control unit having a terminal equipment monitoring function [Prior Art] FIG. 2 is a block diagram of a conventional interrupt control system for an electronic exchange. In FIG. 2, 1' is a central control unit, and 2 is a program storage memory in which a program for determining control operations of the central control bag W1 is stored.

Further, 3 is a temporary storage memory, and the central control unit 1',
Data is exchanged between the program storage memory 2 and the temporary storage memory 3 via a data bus R. Reference numeral 4 denotes a periodic interrupt generator that generates periodic interrupts to the central control device 1, and exchanges input/output signals between the central control device 1' and the terminal control device 6' via the input/output bus 12. . 5
I to 5N are terminal devices.

In the interrupt control device having such a configuration, a call processing program is stored in the program storage memory 2, and the central control bag w1' refers to the temporary storage memory 3 and executes call processing according to this call processing program. . The periodic interrupt generator 4 issues an interrupt request to the central controller 1' periodically (for example, every 16 milliseconds) via the periodic interrupt request line 7!4. When the central control unit 1' detects this interrupt request, it operates to temporarily interrupt the program currently being processed and transfer control to the status monitoring program of the terminal devices 51 to 5N. In this status monitoring program, the input/output bus l
, to detect the presence or absence of a state change (for example, call origination, recovery, etc.) by scanning all terminals controlled by .

[Problem that the invention seeks to solve]

In such a conventional method, the processing time of the status monitoring program increases in proportion to the number of terminal devices 5 accommodated, and even when there is no change in the status of the terminal devices 5, periodic interruptions occur and call processing is interrupted. Because of the interruptions, there is a drawback that the processing capacity of the central control unit 1' cannot be fully utilized.

The present invention eliminates these drawbacks by shortening the processing time of the status monitoring program, and eliminating waste such as periodically executing the status monitoring program regardless of whether there is a change in the status of the terminal device. An object of the present invention is to provide an interrupt control method for an electronic exchange that can make the most effective use of the processing capacity of a central control unit.

[Means for solving problems]

The present invention includes a plurality of terminal devices, a periodic interrupt generation device that periodically generates an interrupt request, a program storage memory that stores a status monitoring program for the terminal devices, and an output signal of the periodic interrupt generation device. In an interrupt control method for an electronic exchange using a stored program control method, the central control device includes means for temporarily interrupting a program being processed and reading out and executing a status monitoring program for the terminal device from the program storage memory. , a plurality of detection means are connected correspondingly to the plurality of terminal devices and detecting the status changes of each of them independently, and a plurality of detection means are connected correspondingly to the plurality of detection means, and detection outputs from the plurality of detection means are provided. Enter
A plurality of interrupt request generation means generate interrupt requests, and an interrupt request with the highest priority is selected from among the interrupt requests from the plurality of interrupt request generation means according to predetermined priorities. and interrupt request selection means for transmitting the interrupt request to the central control unit, wherein the central control unit transmits the interrupt request to the interrupt request selection unit in response to the interrupt request sent from the periodic interrupt generation unit. The present invention is characterized by comprising means for activating the means for executing the interrupt request only when there is a request.

[Effect]

The present invention detects a change in the state of a terminal device by a state change detection means, generates an interrupt request by an interrupt request generation means, and selects an interrupt with the highest priority according to a predetermined priority by an interrupt request selection means. By selecting and transmitting the request to the central controller, the status monitoring program does not have to scan all the terminal devices to detect the presence or absence of a status change.
Further, when no change in the status of the terminal device is detected, the regular status monitoring program is no longer executed, and the processing capacity of the central control unit can be utilized effectively to the maximum extent possible.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings. 1st
The figure is a block diagram of an interrupt control device for an electronic exchange according to an embodiment of the present invention. The central control device is connected via a data bus 1 to a program storage memory 2, which stores a program that determines the control operations of the central control device 1, and a temporary storage memory 3, and data is exchanged therewith. Interrupt requests from the periodic interrupt generator 4 are periodically connected to the central controller 1 via an interrupt request line β2.

Here, the feature of the present invention is the interrupt request selection portion surrounded by a dashed line. That is, terminal equipment 5. ~5N
The output is from the state change detection units 6□ to 61 in the terminal control device 6.
N respectively. State change detection units 6.1 to 61
The state change detection output of , is the interrupt request generation section 6□1 to 6□8.
are controlled respectively.

The interrupt request outputs of the interrupt request generation units 621 to 6tN are connected to the interrupt request selection unit 63, and the interrupt request with the highest priority is selected from the interrupt request selection unit 63, and is sent via the interrupt request line a2. and is connected to the central control device 1.

The central control device 1 is connected to the terminal control device 6 via a bus 13, and input/output signals are sent and received.

The operation of the interrupt control device of the electronic exchange having such a configuration will be explained. In FIG. 1, the terminal control device 6 includes a state change detection unit 6 that detects a state change of the terminal device 5175N.
+t~618 and an interrupt request generating section 6□1~62N that issues an interrupt request in response to the detection of this state change, and among these N interrupt requests, the one with the highest priority is An interrupt request selection section 63 is added that selects interrupt requests with high priority.

The interrupt request selected here is transmitted to the central control bag W1 via the newly provided interrupt request line 7!2. Further, an interrupt request from the periodic interrupt request generator 4 is transmitted to the central controller 1 via the interrupt request line 12. The periodic interrupt generating device 4 periodically interrupts the central control device 1 via the interrupt request line β2 as in the conventional device, but the status monitoring program of the terminal device 5 is not activated by this periodic interrupt. Instead, only the various timers are updated.

Now, the terminal equipment 5. ~5N, when a state change occurs (for example, call origination or recovery), the terminal control device 6
The state change detecting units 611 to 61N of the interrupt request generating units 62 . ~6□8 is instructed to generate an interrupt request. Interrupt request generator 6! I~6□8 generates an interrupt request and outputs it to the interrupt request selection section 63.

Interrupt request selection section 6. is configured to select, when a plurality of interrupt requests are input at the same time, the interrupt request with the highest priority among them.

The interrupt request selected by this interrupt request selection section 63 is the interrupt request line i! , 2 to the central control unit I. In response to this interrupt request, the central control device 1 temporarily suspends the program currently being processed and transfers control to the state change processing program of the terminal device 5.

〔Effect of the invention〕

As explained above, the present invention eliminates the inconvenience that the status change processing program is started only when a status change occurs in the terminal device, and the status monitoring program is periodically executed regardless of whether there is a status change. , the processing power of the central control unit can be utilized to the maximum extent possible. In addition, an interrupt request selection section is provided, so even if multiple terminal devices change their status at the same time, only the interrupt request with the highest priority can be selected, resulting in an excellent effect of processing with less waiting time. There is.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an interrupt control device for an electronic exchange according to a first embodiment of the present invention. FIG. 2 is a block diagram of a conventional interrupt control device for an electronic exchange. DESCRIPTION OF SYMBOLS 1... Central control unit, 2... Program storage memory, 3... Temporary storage memory, 4... Periodic interrupt generator, 5... Terminal equipment, 6... Terminal control device, 6I・・・
・Conventional change/detection section, 6□... Interrupt request generation section, 63
...Interrupt request selection section, X, ...data bus, 12.
...Interrupt request line, 13...bus.

Claims (1)

[Claims] (1) A plurality of terminal devices, a periodic interrupt generation device that periodically generates interrupt requests, a program storage memory that stores a status monitoring program for the terminal devices, and an output signal of the periodic interrupt generation device. In an interrupt control system for an electronic exchange using a stored program control system, the system comprises a central control unit that includes means for temporarily interrupting a program being processed and reading out and executing a status monitoring program for the terminal device from the program storage memory, A plurality of detecting means are connected correspondingly to the plurality of terminal devices and detecting the state changes of each device independently, and a plurality of detecting means are connected correspondingly to the plurality of detecting means and detecting outputs from the plurality of detecting means are provided. a plurality of interrupt request generation means that input and generate interrupt requests; and an interrupt request with the highest priority according to a predetermined priority among the interrupt requests from the plurality of interrupt request generation means. and an interrupt request selection means for selecting and transmitting the selected interrupt request to the central control unit, wherein the central control unit selects the interrupt request and transmits it to the interrupt request selection unit in response to the interrupt request sent from the periodic interrupt generation means. An interrupt control method for an electronic exchange, comprising: means for activating the means for executing the interrupt request only when there is an interrupt request.