KR910004270B1 - Automatic control method of calls in switching center - Google Patents

Abstract

The CPU checks the load rate of an exchange periodically so that, when the load rate above the certain level is maintained for a certain time, the calll is limited according to the subseriber's level. The method includes steps; (A) checking that the mean load rate reaches a certain level (97.5%); (B) clearing a load counter and checking that the call limiting bit is set when the mean load rate does not reach a certain level; (C) setting the call limiting bit and releasing an alarm; (D) increasing the load counter when the load rate reach a certain level and checking the time passage; (E) clearing the load counter when a ceretain time is possed and checking jthe manual call limiting bit is set; and (F) setting the automatic call limiting bit and the alarm bit and sending a message.

Description

Automatic Call Control Method due to Heavy Runaway in Exchange

1 is a system diagram applied to the present invention.

2 is a conventional general call restriction flow diagram.

3 is a flow chart of a call control in case of a conventional emergency.

4 is a flow chart according to the present invention.

5 is a memory map diagram according to the present invention.

The present invention relates to an automatic call control method due to call congestion at the exchange. Particularly, the central control unit periodically checks the load rate and when the constant load rate is maintained for a certain time, except for some subscribers that are important according to the subscriber level. The present invention relates to an automatic call control method due to a rush of traffic at an exchange that can automatically control a call.

In general, a call control method is a method in which an emergency occurs and communication control is required so that the operator of the exchange restricts subscribers except for a certain level of subscribers to solve an emergency according to the level required by the emergency control department. . Referring to the conventional control method with reference to the FIG. 1 exchange system and the flow charts of FIG. 2 and FIG. 3, the call control method according to the conventional emergency occurrence in FIG. 3 shows communication only to important subscribers such as national organizations in case of an emergency. When the communication control authority instructs the operator of the exchange operator to provide the service, the operator manually gives the communication control command to the central control unit of the exchange to carry out the communication control. When the instruction is given to the operator, the operator is able to provide a communication service to the general subscriber by giving a release command to the central control unit. In other words, since all communication control functions are performed by manual instruction, communication control was subjectively judged by the management rights holder, so there was no consistency in communication operation. As another method, as shown in FIG. 2, the central processing unit (CPU) The program also attempted to limit the general call automatically by the average load factor.

That is, every 4 seconds, the central control unit checks the average load rate in the program, and if the average load is more than 85% and less than 97.5%, the central control unit (CPU) can continue the call of the general subscriber while reducing the number of tests of some devices. If the average load length is more than 97.5%, the average subscriber length is reduced by 1/8, and the subscriber is tried to maintain the stability of the system as much as possible. Communication control has been implemented according to the flow chart. Accordingly, in the conventional call control, a lot of time is taken to take action because the system operator must manually control the call after the general user is notified that the call is not made due to the bursting run when the emergency is suddenly reached. In addition, if the user does not exist in the system, the call control can not be performed at all, the problem was getting bigger.

Accordingly, an object of the present invention is to automatically perform call control for some important subscribers (emergency phones) when the central control unit occupies a load rate periodically for a predetermined time and maintains a predetermined period of time at the exchange. In providing a method.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

4 is a flowchart according to the present invention, which includes a first step of checking whether the average load rate has reached a predetermined value (97.5%), and a clearing of the load counter when the predetermined value is not reached in the first step, and an automatic emergency. A second step of checking whether the emergency call limit bit is set, and when the automatic emergency call limit bit is set in the second step, reset the automatic emergency call limit bit, clear the alarm, and automatically call limit with the automatic message output. A third process of notifying reset, a fourth process of checking whether a predetermined time has elapsed by increasing the load counter when the load ratio reaches a predetermined value in the first process, and when the predetermined time has elapsed in the fourth process Clear the load counter and check if the manual emergency call limit bit is set to read the status of another device when it is not set Checking the fifth process and whether the automatic emergency call limit bit is set when not copying in the fifth process, sets the automatic emergency call limit bit and sets the alarm bit when it is not set. When the emergency call restriction bit is set, the sixth step of outputting a message is performed.

FIG. 5 is a memory map diagram according to the present invention, where (5a) refers to the contents of a corresponding buffer governing communication control, in which bit 14 is manually inputted by the operator through MTTY 56 of FIG. The bit is stored in the memory 54 and 60 and the auxiliary memory device 55 and 61 according to the information, and the bit is controlled to control communication. In the buffer, bit 15 is automatically programmed by the first CPU every 4 seconds. (CPUA) A bit that calculates the average load rate and controls communication. (5b) is a first CPUA load counter, which is composed of one buffer and has an average load rate of 97.5%, which is 5 times in a row to perform communication control (that is, check for 20 seconds). . Reference numeral 5c denotes a corresponding buffer indicating the current state of the central processing unit of the other party than the central processing unit of the first and second central processing units CPUA and CPUB.

Therefore, a specific embodiment of the present invention will be described in detail with reference to FIGS. 1, 2, 4, and 5, the present invention is a function that can automatically detect the communication in the event of a burst run by the emergency generator to control communication By providing the alarm, the emergency alarm is automatically displayed on the alarm panel 52 of FIG. 3 even at the time of release and release so that the communication of important subscribers can be maintained without interruption. You can know immediately by outputting through), and it is a way to provide communication service to general subscribers.

4 is a flowchart of an automatic call control method in case of an emergency according to the present invention. The program of the central control unit always monitors the average load rate of the central control unit every four seconds as shown in FIG. Here, when the average load rate reaches 97.5% for the first time, the CPU load counter 28 is increased by one in FIG. 4, and continues to increase if it continues in the next cycle. If the CPU load counter is less than 5, go to the next cycle (communication control not carried out) .If it reaches 5 or more, that is, 20 seconds have elapsed (29), the CPU load counter is cleared (30). If the manual CB bit (5a in FIG. 5) and 14 bits are set to check, the automatic bit 31 does not need to be checked, but if the manual bit is reset, the first central processing unit (CPUA) 59 and the second bit are not set. If the second central processing unit CPUB is itself in the central processing unit CPUB 58, then the second central processing unit CPUB brings the buffer of FIG. 5C (32) to the first central processing unit ( If the CPUA is aware of the copy state (33) and the first CPUA is in the copy state, the average load rate of 97.5% can be reached. Check 34 to skip if communication is already under control, or set an automatic CB bit (5a bit 15 in FIG. 5) (3 5) Enter the communication control system, the emergency alarm is displayed in red on the alarm panel 52 in the system console 51 of FIG. Then, the message outputs "S177 CB SET BLKG" through the output device through the STTY 57 of FIG. In the step (35), the contents are stored in the auxiliary memory unit 55 of the CPU itself in case the system is down due to some reason. Automatic control is maintained even when online.

In the first flow chart 21 of FIG. 4, the average load rate is periodically checked every four seconds. If the load falls even once without maintaining the load rate of 97.5%, the program checks every four seconds to check the CPU load counter. After erasing (22), if the automatic CB bit is reset 23, the automatic control is released (24). If the automatic CB bit is set, automatic control is released (24), and this information is deleted from the contents of the auxiliary storage device of FIG. In addition, the alarm is cleared to the alarm panel 52 of the system console 51 of FIG. 1, and a message is output through the STTY 57 (FIG. 5b, " S177 CB CANC BLKG ").

As described above, when the congestion occurs due to an emergency, the central control unit detects and releases the communication control by executing the control and canceling the communication manually every time. By checking and implementing the control, the subjective management of the communication controller is excluded, and there is an advantage in that it plays a useful role in terms of the efficiency of the system and the general subscriber.

Claims (1)

In the automatic call control method due to the call congestion of the exchange, the first step (21) of checking whether the average load rate has reached a predetermined value (97.5%), and the predetermined value is not reached in the first step (21). 2nd process (22-23) to clear the load counter and check if the automatic emergency call limit bit is set, and automatically when the automatic emergency call limit bit is set in the second process (22-23). A third emergency process (24-26) that sets a call emergency call limit bit, clears an alarm, and automatically resets the call limit by automatic message output; and when the load ratio reaches a predetermined value in the first process (21). The fourth process (28-29) of checking whether the predetermined time has elapsed by increasing the load counter, and clearing the load counter when the predetermined time has elapsed in the fourth process (28-29), sets the manual emergency call limit bit. Isn't it set to check A fifth process (30-33) for checking whether a copy state is read by reading the state of another device, and whether an automatic emergency call limit bit is set when the copy state is not in the fifth process (30-33). In the exchange, the sixth process (34-37) is set to set the automatic emergency call restriction bit when it is not set, set the alarm bit, and output a message when the automatic emergency call restriction bit is set. Of automatic call control due to congestion of traffic.

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