JPH0612530B2 - Data transmission / reception method - Google Patents

Description

Description: (a) Technical Field of the Invention The present invention enables data transmission to each terminal device to be performed almost concurrently when data is transmitted from a host device to a plurality of terminal devices. The data transmission / reception method is as follows.

(b) Conventional technology and problems In a system in which a host device such as a center and a plurality of terminal devices are connected by a line, so-called distribution processing is performed in which data prepared in advance is sequentially transmitted to each terminal device. Be seen. In the conventional distribution process, first, the host device transmits data in units to one terminal device. Then, the response (for example, data reception permission / prohibition response) data from the terminal device in response to this data transmission is referred to. As described above, conventionally, every time data is transmitted to one terminal device, the transmission result regarding the data transmission (that is, the response from each terminal) is confirmed, and the data is transmitted to the next terminal device. Therefore, the time required for data transmission (including confirmation of the transmission result) to each terminal device in the distribution process becomes long, which is one of the causes of delaying the distribution process.

(c) Object of the Invention An object of the present invention is to provide a data transmission / reception system capable of shortening the data delivery time to each terminal device in order to eliminate the above-mentioned conventional drawbacks.

(d) Configuration of the invention In order to achieve the above-mentioned object, in the present invention, the confirmation of the transmission result, which was performed together with the data transmission to each terminal device, is stopped, the data transmission to each terminal and the response data reception from each terminal are performed. Accumulation should be done in parallel. The confirmation of the transmission result is performed collectively after the transmission of the transmission data in units of each terminal is completed. The present invention will be described in detail below with reference to examples.

(e) Embodiment of the Invention FIG. 1 is a configuration block diagram showing an example of a data transmission / reception system to which the present invention is applied. The system shown in the figure is an online data transmission / reception system between a center 1 and each branch (sales office) 7 in a financial institution such as a bank. A central processing unit (hereinafter referred to as CPU) 2 of the center 1 is a plurality of terminal devices installed in each branch 7 via a communication control device (CCP) 3, a specific (dedicated) line, and a terminal control device (TC) 5. It is connected to 8, 9 ...

The center 1 is provided with a filter 4 for storing account information of customers, transaction information conducted at each branch, and the like. A buffer file (cassette) 6 provided in the terminal control device 5 is used for buffering transmission / reception data between the center 1 and each terminal.

In this system, for example, the center 1
The distribution process is performed by. That is, the transaction amount of each day at each branch is totaled at the center 1, and the total data is notified to each branch 7. This aggregated data is generated for each branch, and is output by a terminal device such as the printer device 9 in each branch 7.

FIG. 2 is a diagram showing an embodiment of the present invention and is a functional block diagram showing a configuration of a distribution processing unit in the center CPU 2 shown in FIG. FIG. 3 is a flow chart showing the operation of the embodiment shown in FIG. In FIG. 2, 2
Reference numeral 1 denotes a distribution control unit, which sequentially sends out distribution data prepared for each terminal (that is, each branch), 22 denotes a communication control unit, which controls communication on the line by the communication control device 3. Reference numeral 23 denotes a transmission result output unit which receives response data returned from each terminal device (for example, the printer 9) and sequentially stores the response data. Each of these control units 2
1 to 23 are configured as programs executed by the CPU 2, for example.

Reference numerals 41 and 42 denote a distribution data file and a transmission result file, respectively, to which a part of the center file 4 shown in FIG. 1 is allocated. The distribution data file 41 is a sequential index organization file, and data reading can be performed randomly or sequentially. The key is composed of the destination terminal number, the form page indicating the total data to be transmitted, the line number of the form, and the like. The distribution control unit 21 will access the file 41 using these keys and prepare transmission data for a certain terminal device.

On the other hand, the transmission result file 42 is a sequential file, and its area is prepared by the transmission result output unit 23. Then, the response data from the terminal device to which the distribution control unit 21 transmitted the data is stored. This response data is composed of the receiving side terminal number and information indicating whether or not the reception is possible. The operation of the embodiment apparatus will be described below with reference to the flowchart of FIG.

First, the distribution control unit 21 reads the distribution data file 41 and edits the first data to be distributed to each branch 7. In the present embodiment, this first data is a start command of distribution of aggregated data to the terminal device 9 of each branch.

The delivery control unit 21 edits this delivery start command in a message format and activates the communication control unit 22. Communication control unit 2
2 sends this message to the corresponding line based on the destination terminal number included in the message. Specifically, the distribution data is sent to the terminal control device 5 that controls the data transmission destination terminal device 9. Transmission of this distribution data (in this case, the distribution start command) is performed by the backsend data file 4
This is sequentially performed for all the terminal devices 9 designated by 1.

Upon receiving the distribution start command, the terminal control device 5 returns response data for this command. That is, it senses whether or not the self and the destination terminal devices 9 are ready to receive. Then, based on this sense result, the data receivability status is returned. For example, the power ON / OFF state of the terminal device 9 and whether or not the magnetic tape cassette for storing the total data is properly set are checked to determine whether or not the data can be received. Then, together with the terminal number of each terminal device, the response data indicating whether the reception is possible or not is returned to the center 1.

The content of the response message returned from the terminal control device 5 is
It is written in the transmission result file 42 by the transmission result output unit 23. The reception of the response message and the writing to the file 42 are performed corresponding to the message transmission to each terminal device. That is, the communication protocol between the communication control device 3 and the terminal control device 5 is the same as the conventional one. However, the data transmission operation by the distribution control unit 21 and the reception and accumulation operation of the response message by the transmission result output unit are performed completely independently. That is, the delivery of the distribution data is sequentially performed without performing the content analysis (decoding) operation of the response message.

Then, after the first data transmission by the distribution control unit 21 to each terminal device 9 is completed and all the response data for these data transmissions are written in the transmission result file 42, the file 42 by the distribution control unit 21. Will be lead. That is, the content of the response from each terminal device is analyzed. As a result, a key including the terminal number of the terminal device, the form page, and the number of lines is created for the terminal device whose transmission result is normal (receivable state). Then, the distribution data file 41 is accessed based on this key, and the next transmission data for this terminal device (in this case, the data on the first line of the first page of the aggregation data for each unit) is read. The read data will be distributed by the same operation as described above.

On the other hand, for a terminal device that has received a response indicating that it cannot be received, the distribution control unit 21 does not send the next data to the terminal device. In this way, the corresponding aggregate data is not sent to the terminal device (branch) that cannot be received.

Regarding the response message from each terminal device to the transmission of the aggregated data for each line to the terminal device that has received a response
Similar to the above, the transmission result output unit sequentially accumulates in the file 42. Then, the above operations (1) to (5) are repeated to sequentially send the aggregated data to each terminal device.

As described above, according to the present embodiment, the operation of transmitting the transmission data to each terminal device and the storage of the response data are performed independently of each other, so that the time of the distribution process can be greatly shortened. Moreover, when sending out transmission data in units of a certain terminal device,
Based on the result of the immediately preceding data transmission to the terminal device, the data transmission / cancellation can be judged, and there is no need to wait for a response from the terminal device. Furthermore, processing such as message resending can be executed as one sequence of distribution processing to each terminal without affecting other distribution processing.

(f) Effects of the Invention As described in detail above, according to the present invention, the data distribution processing time for each terminal device can be shortened, and particularly the processing load of the center CPU can be greatly reduced.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a data transmission / reception system to which the present invention is applied, FIG. 2 is a diagram showing an embodiment of the present invention, and FIG.
The figure is a flowchart of the operation. 1 is a center system, 2 is a CPU, 21 is a distribution control unit, 22 is a communication control unit, 23 is a transmission result output unit, 41 is a distribution data file, and 42 is a transmission result file.

Claims (1)

[Claims] 1. A host device, comprising: a host device; and a plurality of terminal devices connected to the host device via the terminal control device, the host device transmitting data addressed to each terminal device via the terminal control device. At the same time, in the data transmission / reception system in which a response to the data transmission is sent back from each terminal device to which the data is transmitted via the terminal control device, the storage means for storing the transmission data addressed to each terminal device, and the storage means A sending unit that sequentially sends the stored data to each terminal device is provided in the host device, and a recognition unit that recognizes the device state of each terminal device and a process that corresponds to the transmission data according to the recognition result of the recognition unit The terminal control device is provided with a creating means for creating response data indicating whether or not each terminal device is capable, and a storage means for receiving and storing the response data created by the creating means is provided. Provided in the device, the host device sequentially transmits the transmission data in units to each terminal device, then reads the response data accumulated in the accumulating means, and transmits the next data to each terminal device according to the read response data. A data transmission / reception method characterized in that