JPS61289796A - Interruption control system for electronic exchange system - Google Patents

Abstract

PURPOSE:To smooth the system processing of an execution control means setting and releasing a communication information path and to shorten the time necessary for a processing sequence by employing a direct interruption system and a look-in one as an interruption control with respect to an I/O circuit device and that with respect to other I/O devices, respectively. CONSTITUTION:An interruption cause 110 relating to the I/O device includes a time piece information 111 and a circuit state information 112. The former is used as the interruption control of the look-in system, and the latter is used as the interruption control of the direct interruption system. Receiving the occurrence report of the interruption cause 110 and storing it temporarily, the execution control means 121 saves the contents of the temporary storage information under execution and control in a save area part 122 and interrupts temporarily its processing when processing under execution and control is present. With information on the interruption cause from an execution control table 123 as a key, the execution control means 121 refers to the storage address of the prescribed program relating to the interruption cause. Specifying the referred address, the execution control means 121 refers to the program specified by an I/O control program storage part 130, and executes interruption processing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an interrupt control method for an electronic switching system, and particularly to an interrupt control method when an interrupt cause occurs in an input/output device of an electronic switching system.

[Background of the invention]

First, an outline of an interrupt control method when an interrupt cause occurs in an input/output device of an electronic switching system will be explained with reference to FIG. FIG. 2 is a functional block connection system diagram showing an example of the hardware configuration of the electronic exchange system. As shown in the figure, the switching system includes an incoming line device 21 and an outgoing line device 22 provided on the receiving side and transmitting side of communication information, respectively.
and a main switch 23 that connects these input/output line devices 21.22 and exchanges at least one of the time division line and space division line, and obtains information from the input/output line apparatus 21.22 and performs exchange connection of the main switch 23. Central control device 24 to control
a clock device 25 that provides clock information to the central control device fdIL 24; a main storage device 26 that stores execution control programs and data of the central control device 24; 24, an information input device 27 for inputting information by, for example, button operation, and an information output device 28 for taking out processing result data, driving state data, stored data, etc. from the central control device. Here, the central control unit w, 24 has substantially the same function as the central processing unit in a normal converter, and controls the exchange connection operation. The central control unit 24 has an execution control means 241, a save area 242, and an execution control table 243 shown in FIG. 2, and the main storage 26 stores various programs and data. 1 shows an input/output control program storage unit 261 having interrupt control programs A to D among programs for controlling input/output devices.

Electronic switching systems require a large number of simultaneous processing requests from subscribers and maintenance personnel, and these have different time-critical demands. Therefore, the functional processing satisfies predetermined time standards. In an electronic switching system, these tasks must be handled by a single central controller 24 (usually duplicated) within a predetermined allowable time and without errors.

On the other hand, the central control unit 24 has an interrupt function, and when an interrupt cause occurs, it retrieves the corresponding program from a predetermined address and executes predetermined control. For this normal processing, the electronic exchange system classifies the priority into three levels: high (H), low (L), and base (B). Based on the 4ms clock information, the electronic exchange system classifies the priority level into three levels: H level, L level, and B level based on the 4ms clock information. Execute each interrupt control in this order.

The input/output devices connected to the electronic switching system include an input line device 21. Outgoing line device 22. Information input device 27. and an information output device 28 are shown in the figure. These input/output devices require a real-time response time of 4 ms for state changes, so the input/output devices can vary from 12m5 to 2 depending on the type of interrupt cause.
A look-in method is used in which the status is inspected every cycle such as 4m5, and the occurrence of an interrupt cause is detected, and an interrupt control program corresponding to the detected interrupt cause is extracted to execute interrupt control.

On the other hand, in interrupt control, when situation B occurs, such as an operation stop failure, in which a time delay is not allowed for processing,
There is a direct interrupt method in which the occurrence of this state is immediately regarded as the occurrence of an interrupt cause and an interrupt instruction is issued to the central control unit.

When the execution control means 241 receives an interrupt cause while executing one control, the execution control means 241 saves temporary storage information during execution control to the save area section 2.
42, interrupts the process under execution control, and obtains address information from the execution control table 243. Based on this address information, the execution control means 241 retrieves the interrupt control program corresponding to the cause of the interrupt from the input/output control program storage section 261 and performs interrupt control. When the execution control means 241 finishes one of the interrupt controls, it retrieves the saved information from the save area section 242 and resumes the interrupted execution control from the point of interruption.

[Conventional technology]

The interrupt control method of the conventional electronic exchange system employs a look-in method as a method related to input/output devices. In other words, the execution control means of the central control unit controls each type of input/output device at a time period of 12m5 for a magnetic disk, 24m5 for a communication path input/output line device, and 48m8 for a typewriter. It monitors changes in the status of input/output devices, and executes interrupt control by treating the detection of the change as the occurrence of an interrupt cause. Further, interrupt control related to the input/output device using the look-in method is L-level processing, and is executed after H-level processing is completed and before B-level processing.

FIG. 3 is a functional block diagram showing a conventional example. Third
In the figure, only the portion of the input/output device related to the cause of the interrupt is illustrated. In FIG. 3, clock information 31 that is the cause of the interrupt
The execution control means 321 that received G
．． The execution control table 323 and the input/output control program storage section 330 are called, the interrupt control program that is roaring is retrieved, and interrupt control is executed. The save area section 322 has save areas for the L level and the B level, and the execution control means 321 saves temporary storage information during execution control when an interrupt cause of an input/output device occurs during execution control of the B level. is saved to the B-level save area.

The execution control table 323 has storage addresses for each program, and FIG. 3 shows an area for L level.

The execution control means 321 uses the clock information 310 received as the cause of the interrupt as a key to extract an address from the L level area of the execution control table 323 as the storage location of the input/output control program. The input/output control program storage section 330 stores clock information 3
It has a program area for every 10 cycles, with I2m5 cycles and 24m5 cycles.

A 48m5 cycle and a 96m5 cycle program area are illustrated.

Therefore, when the execution control means 321 receives clock information 310 with a period of 24 ms, for example, and assumes that an interrupt cause has occurred, the execution control means 321 temporarily suspends the processing under execution control and saves the contents of the temporary storage information to the L of the save area section 322. The program is saved in the level area, and the storage address is read from the L level area of the execution control table 323 using the 24m5 cycle as the cause of the interrupt as a key, and the 24m5 cycle program is retrieved from the input/output control program storage section 330. The 24m5 cycle program provides the execution control means 321 with an interrupt control procedure.

[Problem that the invention seeks to solve]

The interrupt control method of the conventional electronic switching system employs a look-in method in which the state embrace timing of the input/output device is set using periodic information from a clock device. setting.

There is a problem in that the system processing of the execution control means for release has to wait until the cycle information is received, so that the procedure processing speed cannot be increased.

On the other hand, when starting execution control processing without waiting, there is a direct interrupt method in which when a state changes, the input/output device directly notifies the central controller as the occurrence of an interrupt cause. When this direct interrupt method is adopted, there is an increased chance that interrupt causes will occur consecutively, and the saving of temporary memory information during execution control will be duplicated, resulting in an increase in the saving area and the need for a large amount of storage space. As the number of calls increases, the chances of restarting the interrupted processing increase, and when the call volume is high, there is a problem that there is no opportunity to process B-level programs that mainly involve job analysis.

[Means for Solving the Problems] The interrupt control method of the electronic switching system of the present invention is applicable to communication information that has a small number of state changes among input/output devices, but requires immediate processing in response to state changes at the maximum of I4t. Information is transferred from the input/output line equipment of the network to the central control unit using a change in the line status as an interrupt cause. That is, the interrupt control method of the electronic switching system is related to input/output devices.

The input/output line equipment will use the direct interrupt method, while the information input/output equipment will use the look-in method. Therefore, in the execution control table, an area for direct interrupts is used as well as an area for L level. The input/output control program storage section has a periodic program using a look-in method and a direct interrupt control program using a direct interrupt method.

〔Example〕

Next, an interrupt control method of the electronic switching system of the present invention will be explained with reference to the drawings.

FIG. 1 is a functional diagram showing an embodiment of a portion related to an input/output device of the present invention. In FIG. 1, interrupt causes 110 related to input/output devices include clock information 111 and line status information 1.
There are two types, 12 and 12. Clock information 111 is 12m5 cycles,
4gm5 cycles.

It has information such as a 9Bms cycle, and for example, a 12m5 cycle is a monitoring cycle time for monitoring the status of a magnetic disk *48m5, etc., and is used for the above-mentioned look-in type interrupt control. The line status information 112 indicates that a change in the status of an input/output line device is the cause of an interrupt, and is used for interrupt control using the above-mentioned direct interrupt method. The central control unit includes an execution control means 121, an evacuation area section 122. and an execution control table 123, and an input/output control program storage section 130 as the main storage. The save area unit 122 has a save area in which the execution control means 121 temporarily suspends the process being executed and saves temporary storage information when the execution control means 121 receives the occurrence of an interrupt cause, and this save area is independent of the level order. There are as many surfaces as there are levels, and the writing and retrieval of information is in the form of a star. The execution control table 123 includes an L level area having the address of the periodic program 131 for the look-in method and a direct interrupt control program 1 for the direct interrupt method.
and a direct interrupt area having 32 addresses.

The input/output control program storage unit 130 stores an interrupt control program 131 based on period time information such as a 12 m3 periodic program*4Bms periodic program using a look-in method, that is, a periodic program 131, and a direct interrupt control program using a direct interrupt method. control program 132.

Next, the operating procedure of the execution control means in FIG. 1 will be explained with reference to FIG. 4 and FIG. 1.

FIG. 4 is a flowchart showing an example of the main operation procedure of the execution control means. When there is a process under execution control (operation procedure 2), the execution control means 121a which received the interrupt cause 1100 occurrence notification and temporarily stored it (operation procedure 1) stores the contents of temporary storage information under execution control in the save area section 122. Evacuate and temporarily suspend the process (operation procedure 3). When there is no process under execution control in operation step 2, or after operation step 3, the execution control means 121 indexes the storage address of a predetermined program related to the interrupt cause from the execution control table 423 using the interrupt cause information as a key. (Operation step 4). The execution control means 121 specifies the indexed address and executes the input/output control program storage section 13.
The specified program is indexed starting from 0 (operation step 5). The execution control means 121 executes interrupt processing according to the indexed program (operation procedure 6). The execution control means 121, which has completed the execution of this interrupt processing and erased the temporary storage information (operation procedure 7), checks the existence of save information in the save area section 122 (operation step 8), and if there is save information, the execution control means 121 erases the temporary storage information (operation step 7). The data is then transferred to a temporary storage area for processing (operation procedure 9), the interrupted processing is resumed (operation procedure 10), and the operation procedure ends. If there is no save information in operation procedure 8, the operation procedure ends at that point. Since the save area of the save area section 122 is saved in a stack format, level control is facilitated without having to be aware of the program quality for each level. Also.

Since the execution control table 123 has all input/output control programs registered in advance, it has versatility in execution control.

In the above embodiment, cycle programs of 12m5 cycles, 4grns cycles, and 95m5 cycles were illustrated and explained as input/output control programs, but the 1 cycle program is a look-in type interrupt control program, and programs with other cycles may be used. . In addition, although the illustrations and explanations assume that there is only one interrupt control program for the direct interrupt method, there may be multiple programs depending on the type and status of the line equipment when each piece of information is used as an interrupt cause. .

〔Effect of the invention〕

As explained above, according to the present invention, the occurrence of an interrupt cause when grasping the state of the input/output device is determined based on the clock information based on the time period and the line state information based on the state change received from the input/output line device of the communication information path. A direct interrupt method is used to control interrupts for input/output line devices, and a look-in method is used to control interrupts for other input/output devices. Since the system processing of the control means is smoothed and the time required for the processing procedure is shortened, the efficiency of using one line can be improved.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an example of the interrupt control method of the electronic exchange system of the present invention, FIG. 2 is a block diagram showing an example of the connection of main devices including the input/output device according to the present invention, and FIG. Function block p shows an example of the conventional technology. FIG. 4 is a flowchart showing the main part of the interrupt operation procedure of the execution control means shown in FIGS. 1 to 3. 21... Incoming line device, 22... Outgoing line device, 23... Main switch, 24...
Central control device, 25... Clock device, 26...
...Main storage device, 27... Information input device, 2
8... Information output device, 110... Interruption cause, 111. ...Clock information, 112...
...Line status information, 121...Execution control means,
122... Save area section, 123... Execution control table, 13o... Interrupt control program storage section, 131... Periodic program, 132...
...Direct interrupt control program.

Claims (1)

[Claims] When an information input/output device that inputs and outputs information and an input/output line device that connects a communication line accommodated in a main switch are used as input/output devices, and an interrupt cause related to this input/output device is received. Temporarily saves the temporary storage information of the process under execution control to the save area section, and retrieves it from the input/output control program storage section based on the address indicating the storage location of the interrupt control program related to the cause of the interrupt read from the execution control table. In an interrupt control method for an electronic switching system, which includes an execution control means for controlling the execution of an interrupt operation procedure according to an interrupt control program, a predetermined cause for an interrupt related to the input/output device is specified for the information input/output device. said execution control means for receiving clock information for notifying the periodic point of said line device, and line status information for said line equipment; a periodic program based on said clock information and a direct interrupt control program based on said line status information; the input/output control program storage unit storing the interrupt control program; the periodic program; An interrupt control method for an electronic switching system, comprising: an execution control table having a low level area for storing and storing addresses and a direct interrupt area for storing and storing addresses of the direct interrupt control program.