JPS63237150A - Interruption process system for data communication - Google Patents

Abstract

PURPOSE:To effectively execute communication by interrupting from a computer whose priority is high to a computer whose use frequency is high so as to execute data communication and resetting the data communication released by the interruption after completing the communication. CONSTITUTION:When a computer terminal (DTB) 102 interrupts a computer terminal (DTA) 101 and the computer (COM) 103 which are under communication by dialing a special number in order to execute an emergent communication, the CPU 104 transmits an interruption message to the DTA 101 and the COM 103, when the priority of the DTA 102 is higher than that of the DTB 101, and forcedly releases the data communication between them, after that it connects a link between the COM 103 and the DTB 102 so as to start the communication. After completing the communication, the communicating state between the DTA 101 and the COM 103 returns.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a data communication interrupt processing system, and particularly to a data communication interrupt processing system that is used to process data during communication in a storage program controlled switch (hereinafter referred to as SPC) capable of data communication between computers or computer terminals. This invention describes a data communication interrupt processing method when interrupting a computer or computer terminal from another computer or computer terminal.

[Conventional technology]

Conventionally, this type of interrupt processing method has only sent a busy display or busy instruction to the computer or computer terminal that has issued the interrupt.

[Problem that the invention seeks to solve]

The conventional interrupt processing method described above only sends out a busy display or busy instruction if the computer or computer terminal with which you wish to communicate is in communication with another computer or computer terminal, so you have to wait until the communication ends. I had to.

Therefore, frequently used computers or computer terminals have the drawback that each time you dial, you may encounter a busy call, and even if an urgent matter arises, you cannot communicate.

[Means for solving problems]

The data communication interrupt processing method of the present invention uses a priority memory that stores the priorities of computers or computer terminals connected to the SPC, the presence or absence of an interrupted computer or computer terminal, and the priority memory when an interrupt occurs. Each terminal has an interrupt computer or an interrupt target memory that stores the storage location of the computer terminal.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the data communication interrupt processing method of the present invention, and FIG. 2 is a flowchart for explaining the operation in FIG. 1. In Figure 1, S
A PC network (hereinafter referred to as NW) 100 accommodates computer terminals (hereinafter referred to as DTA, DTB) 101 and 102 and a computer (hereinafter referred to as COM) 103, and a central processing unit (hereinafter referred to as CPU) 104 handles connection processing within the SPC. in charge of The CPU 104 has a priority memory (PM) 1
05 is prepared for each computer or terminal, and the terminal priority (hereinafter referred to as P) of each terminal is written from the maintenance terminal (hereinafter referred to as MAT) 110 using a generally known method. In addition, the CPU 104 is provided with an interruptible memory (hereinafter referred to as M) 106 for each terminal.
M106 is an interrupt determination bit (hereinafter referred to as JB) 1 that indicates the presence or absence of a computer or terminal that has been forcibly restored by an interrupt.
07 and an interrupt storage location memory (hereinafter referred to as EN) 108 indicating the storage location thereof.

Next, the operation of this embodiment will be explained with reference to FIG. 2.

For example, DTA 101 connects C0M1 via NWloo.
Data communication with 03 is in progress. This state Te DTB
C0M 102 to perform data communication with C0M103
Dial the 103 number. At this time, DTAlol and COM 103 are connected via the solid line link of NWloo.
is in communication, a busy indication is sent to the DTB 102.

When the DTB 102 dials a special number to make an emergency communication and interrupts the communicating DTA 101 and C0M 103, the CPU 104 calls DTAlol and DTB.
102's P2O3 is read from PM105 and compared, P2 of DTB102 is higher than P2O3 of DTA 101.
DTAIOI and C0M103 when O3 has high priority
After forcibly restoring data communication by sending an interrupt message to , connect the link between C0M103 and DTB102 (shown with a broken line at NWloo in Figure 1) and start communication.
Set “1” to JB107 of 6, and set DTA to EN108.
Write the accommodation position of 101.

When data communication between DTB102 and C0M103 is completed, CPU 104 reads IM106 of C0M103, and when JB107 is set to "1", it is determined that there is a computer or computer terminal whose communication with C0M103 has been forcibly restored by an interrupt. and EN10
Read the storage position of DTAlol from 8 and set it to C0M10.
If 3 is empty, it will be called again and the state before the interruption, that is, D
The communication status between TAL, 01 and C0M103 is returned.

〔Effect of the invention〕

As explained above, the present invention provides a central processing unit with a priority memory that indicates the priority of computers or computer terminals connected to an SPC, and a memory that stores the accommodation positions of computers or computer terminals that have been interrupted and forcibly restored. By having an interrupt memory, a frequently used computer or computer terminal can be interrupted by a computer or computer terminal with a high priority to execute the data communication, and after the communication is completed, the data communication restored by the interrupt can be resumed. Since the settings are reset, there is an effect that communication can be carried out efficiently without waiting in case of an emergency, and without the need for the restored side to dial and reset data communication one by one.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the data communication interrupt processing method of the present invention, and FIG. 2 is a flowchart for explaining the operation in FIG. 1. 100...Network (NW), 101.102.
...Computer terminal (DTA, DTB), 103...
- Computer (COM), 104... Central processing unit (CPU), 105... Priority memory (PM), 1
06...Interrupted memory (IM), 107...Interrupted determination bit (JB), 108...Interrupted terminal storage location memory (EN), 109...Terminal collection 1 diagram 2) A91) Figure 2 (A-2) C: Con and -1ta x t@44mi

Claims (1)

[Claims] In a storage program controlled switching system capable of data communication by a computer, a priority memory is provided for each terminal on the central processing unit side of the switching system to store the priority of the computer, and a storage position of the interrupted computer is stored. When an interrupt occurs to the computer during data communication, the central processing unit reads the priorities of each terminal on the interrupting side and the interrupted side from the priority memory, compares them, and interrupts the computer. If the priority of the side is high, the storage location of the interrupted computer is registered in the interrupted memory of the computer communicating with this interrupted side, and an interrupt message is sent to the interrupted side to start communication with the interrupted side. . A data communication interrupt processing method, characterized in that after the end of the communication, the computer to be interrupted is read from the memory to be interrupted and communicated again.