JPH0761092B2 - Terminal control device - Google Patents

Description

DETAILED DESCRIPTION [Outline] A data transmission method between a terminal control device and a host computer system, in which data is unilaterally continuously sent from a plurality of terminal control devices to the host computer system. In order to distribute the load concentrated on the communication line and the host computer system, the interval timer value is automatically calculated according to the data transfer rate notified by the host computer system etc., and this value is stored in the terminal controller. By setting in the memory and performing data transmission after this timer value time-out processing, it is possible to easily distribute and reduce the load without changing the system configuration.

[Industrial application field]

The present invention relates to a terminal control device that controls data transmission at a predetermined data transfer rate.

For example, there is a time zone in which terminal devices in stores scattered all over the country transmit data unilaterally and continuously to a host computer system in a center like a banking online system. In this case, the line load and the center load are heavy. It becomes a load.

Practical application of a method capable of efficiently and simply distributing the load when the load is concentrated on such a line or center is expected.

[Problems to be solved by conventional technology and invention]

FIG. 4 is a system diagram for explaining the conventional example, and FIG. 5 is a process flow diagram for the conventional example.

The system diagram in Fig. 4 shows an example of a banking online system. It is a host that is installed as a center device, performs centralized processing of data transmitted from each store, and sends data in response to requests from each store. Computer system (HOST) 1
And the modems 2 and 3 for modulating / demodulating data when exchanging the data through the communication line and the plurality of connected terminal devices 5 (0) to 5 (n), and under the control. Certain terminal devices 5 (0) to 5
(N) and a host computer system (HOST) 1 that exchanges data with a terminal controller (hereinafter referred to as T / C)
4 and terminal devices 5 (0) to 5 (n) that are installed in each store and perform data input and output during business processing.

Normally, data is exchanged between the host computer system (HOST) 1 and the T / C 4, and data reception from the host computer system (HOST) 1 is stored in the memory 41 inside the T / C 4 (see FIG. 1). Reception processing is performed based on the reception program (a).

Further, when data is transferred from the T / C 4 to the host computer system (HOST) 1, the transmission process is performed based on the transmission program (b) also stored in the memory 41.

On the other hand, the T / C4 has a function to set the data transfer speed (the unit is displayed in bit / s), and the set data transfer speed (for example, 2400bit / s, 4800bit / s, 9600bit / s, etc.) The speed setting according to is also performed for each modem 2 and 3.

Further, for example, when data is continuously transmitted in one direction from the T / C 4 to the host computer system (HOST) 1 in the processing status of one day, the data is transmitted at a predetermined interval.

This interval is for distributing the load on the host computer system (HOST) 1 side and the load on the communication line, and the interval timer value is changed according to the data transfer rate to perform continuous data transmission. For example, 100ms when the data transfer rate is 2400bit / s, 400 when it is 4800bit / s
For ms and 9600bit / s, set the interval timer value of 800ms.

The T / C4 data transfer process as described above is performed as shown in the process flow of FIG.

That is, when a plurality of data transfers are continuously performed, data transmission control is performed by one-way transmission (step 100), and when one data transmission is completed, it is determined whether it is the final data.
(Step 101) At this time, if the data is not the final data, it waits for a fixed time corresponding to the data transfer rate as described above (Step 103), and returns to Step 100 to perform the next data transmission control. Note that these processes are performed under the control set by the reception program (a) and the transmission program (b) stored in the memory 41.

Further, when there are a plurality of data transfer rates, the number of systems corresponding to the data transfer rates is set up and the data transmission processing is performed.

Therefore, conventionally, it is difficult to change the interval timer value to cope with the change of the data transfer rate at the time of transmitting the specific data. If it is realized, the receiving program (a) and the transmitting program (b), etc. There is a problem in that a large amount of man-hours is required to change the system contents each time and the system contents are changed, and a flexible system cannot be constructed.

[Means for solving problems]

FIG. 1 shows a block diagram for explaining an embodiment of the present invention.
The block diagram of this embodiment has the same system configuration as the system described in FIG. 4, but the following functions are added to the functions of the T / C4. That is, from the time setting area (c) for setting the interval timer value in the memory 41 and the data transfer rate notified from the external operation panel (not shown) of the host computer system (HOST) 1 or T / C4, An interval timer value calculator 42 for calculating an interval timer value set in the time setting area (c) is provided.

[Action]

Data is sent continuously from the T / C to the host computer system (HOST) unilaterally, and during the time when the center side and rotational load are concentrated, the host computer system or the external operation panel of the T / C The data transfer rate is notified, the interval timer value calculation unit automatically calculates the interval timer value according to this specific data transfer rate, and this value is calculated by the T / C.
By setting it in the time setting area of the internal memory, taking in the interval timer value set in the time setting area during transmission control based on the transmission program, and performing control so that data transmission is performed after this timer value times out. The flexible system construction can be realized by a simple method, and the temporary center side and line side load concentration can be easily dispersed and reduced.

〔Example〕

The present invention will be described in detail below with reference to the embodiments shown in FIGS.

FIG. 2 is a diagram for explaining the data transmission processing flow in the embodiment of the present invention, and FIG. 3 is a diagram for explaining the data transmission processing situation in the embodiment of the present invention. The same reference numerals denote the same objects throughout the drawings.

In this embodiment, the predetermined time is set in the time setting area (c) of the memory 41 by setting the notification of the predetermined data transfer rate sent from the host computing system 1 when the system of this embodiment is started on that day by T / C4. Internal reception program (a)
This is done when the receiving process is performed.

In setting the interval timer value at this time, a predetermined data transfer rate (for example, 2400 bits / s) is notified to the interval timer value calculation unit 42, and the interval timer value calculation unit 42 has a predetermined correspondence based on this speed. The interval timer value is calculated and stored in a predetermined location of the memory 41.

Next, when transmitting specific data in a predetermined time zone, that is, when transmitting data unilaterally from the T / C 4 to the host computing system 1, set the time setting area (c) for each predetermined data block. Data transmission is performed with a waiting time interval between the specified interval timer values, and the line load and the load of the host computer system 1 are dispersed by the concentration of data transmission.
Try to reduce the load.

In the control based on the transmission program (b) in the T / C4, the acquisition of the interval timer value from the time setting area (c) is skipped in the normal time zone, and the transmission program ( The control based on b) takes in the interval timer value from the time setting area (c).

As a method of fetching the interval timer value from the time setting area (c), for example, the transmission program (b) may be configured to determine the set time zone, or the set time may be set from the time setting area (c) in the transmission data. This is done by providing a flag area for capturing.

In the control based on the transmission program (b), when the set time is taken from the time setting area (c), the next data block is transferred after the time-out process (b) ′ of the interval timer value.

The processing flow is shown in FIG. 2 and the processing status is shown in FIG.

〔The invention's effect〕

According to the present invention as described above, it is possible to easily reduce the line load and the load concentration of the center device when transmitting specific data in a specific time zone by a simple method, and to construct a system with flexibility. There is.

[Brief description of drawings]

FIG. 1 is a block diagram illustrating an embodiment of the present invention, FIG. 2 is a diagram illustrating a data transmission processing flow in the embodiment of the present invention, and FIG. 3 is a diagram illustrating a data transmission processing situation in the embodiment of the present invention. FIG. 4, FIG. 4 is a system diagram for explaining a conventional example, and FIG. 5 is a process flow diagram for the conventional example. In the figure, 1 is a host computer system, 2 and 3 are modems, 4 is T / C, 5 (0) to 5 (n) are terminal devices, 41 is a memory, and 42 is an interval timer value calculation unit.

Claims (1)

[Claims] 1. A terminal control device (4) for transmitting data through a predetermined communication line at a data transfer rate set in the communication line, the time setting area (41 (c) holding a timer value. ) And a timer value calculation unit (42) are provided, and when a predetermined type of data group is transmitted through the communication line, the timer value calculation unit (42) sets a timer based on the data transfer rate of the communication line. A value is calculated and set in the time setting area (41 (c)), and the time is set between the data transmission of each predetermined transmission unit of the data group and the subsequent data transmission of the transmission unit. A terminal control device, which is controlled to provide a time interval according to a timer value set in a setting area (41 (c)).