JPH04243451A - File transmission system - Google Patents

Abstract

PURPOSE:To accurately recognize a point of interruption to restart the data transmission from the interrupted point, and to save time and labor necessary for work in the case interrupting of data transmission processing in the process when file data is in transmission from the center machine to a terminal equipment. CONSTITUTION:This present file transmission system is provided with a communication controllers 14A and 14B for carrying out data transmission between center machine 1B and a terminal 1A, a disk 16 for storing data sent from the center machine 1B to the terminal 1A therein, and a non-volatile memory 15 for storing file names and data serial numbers in the process. Further, after the processing is interrupted by a software or hardware failure that occurs in the terminal 1A, the data transmission is restarted from the interrupted point in accordance with data sent from the center machine 1B stored in the disk 16 and data serial numbers stored in the non-volatile memory 15.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a file transmission system, and more particularly to a file transmission system in a system in which a terminal device equipped with a nonvolatile memory and a center machine are connected via a communication line.

0002

[Background Art] Conventionally, when data managed by a central machine is transmitted as a file to a terminal device, if the processing is interrupted midway due to an abnormality in the software or hardware of the terminal, transmission is required to restart the processing. The request was made from the first transmitted data.

0003

[Problems to be Solved by the Invention] In conventional unmanned transmission systems, when processing is interrupted due to the occurrence of an abnormal situation related to the software or hardware of the terminal device, and when processing is restarted, processing starts from the first data. The disadvantage is that it is inefficient.

0004

[Means for Solving the Problems] The file transmission system of the present invention includes a communication control device for performing data communication between a center machine and a terminal device, an input device for inputting a file name at the start of processing, and a center machine. It has an auxiliary storage device that stores data sent from the machine, and a nonvolatile memory that stores file names and data serial numbers being processed.

[0005]

[Embodiment] As shown in FIG. 1, the file transmission system includes an input device 11, a text data editing section (terminal device) 12, a message analysis section (terminal device) 13, communication control devices 14A and 14B, Nonvolatile memory 15, disk (terminal device) 16, text data editing section (center machine) 17, and message analysis section (center machine) 1-8
and a disk (center machine) 19.

Next, the operation will be explained based on FIGS. 1 and 2.

[0007] During file transmission processing, the input device 11
Enter the target file name and start instruction. This start instruction and file name are sent to the text data editing section 12. The text data editing unit 12 edits a file transmission start request message 21 based on the file name input from the keyboard and sends it to the communication control device 14A.

The communication control device 14A transmits the start request message 21 sent from the text data editing section 12 to the center machine 17. In the center machine, terminal device 1
The start request message 21 sent from A is analyzed by the message analysis unit 18, and the data of the requested file name is stored on disk 1.
9, the text data editing unit 17 edits the start response message 22 and sends it to the communication control device 14B.

[0009] The communication control device 14B sends a start response message 22 to the terminal device 1A, and here, the communication control device 14A sends the sent message to the message analysis section 13 for analysis. The message analysis section 13 issues instructions to the text data editing section 12. The text data editing section 12 reads the nonvolatile memory and edits the data request message 23 including the set data serial number. Also, at this time, a file name is set in the nonvolatile memory 15.

A data request message is transmitted by the communication control device 14A. Upon receiving this, the center machine 1B reads data in the order of data set in the data request message 23 from the corresponding file in the disk 19, and edits the data response message 24. Similarly, communication control device 14
B sends a data response message 24 to the terminal device 1A.

[0011] Terminal device 1A that received the data response message 24
The message analysis unit 13 analyzes the data response message 24 and stores the file data in the corresponding file on the disk 16. At this time, the data serial number set in the data request message 23 is output to the nonvolatile memory 15.

The text data editing section 12 counts up the data sequence number, edits the data request message 23, and sends the data request message 23 to the center machine 1B by the communication control device 14A. After that, in the same way, 2
Continue processing steps 3 to 24.

[0013] When the center machine 1B finishes sending the data of the corresponding file on the disk 19, it sends a completion notification message 2.
5 to the terminal device 1A. The terminal device 1A that receives the termination notification message 25 clears the file name and data sequence number of the non-volatile device, and ends the process.

[0014] If the process is interrupted during the process due to a line failure, power off of the terminal, etc., the process is restarted according to the following procedure.

A restart instruction is input from the input device 11. The text data editing section 12 reads the nonvolatile memory 15 and edits the start request message 21 including the set file name. The communication control device 14A sends a start request message 21 to the center machine 1B. As described above, the center machine 1B sends the start response message 22 to the terminal.

When the message analysis section 13 of the terminal device 1A analyzes the start response message 22, it issues an instruction to the text data editing section 12. The text data editing unit 12 reads the nonvolatile memory 15, sets the data sequence number that was written at the time of interruption, and creates a data request message. Hereinafter, the data response message 2 for the data request message 23 is as described above.
Continue processing in step 4.

[0017]

[Effects of the Invention] As explained above, the present invention provides the following advantages when transmitting file data from a center machine to a terminal device.
If processing is interrupted midway through, the point of interruption can be accurately recognized and restarted from the point of interruption, which has the effect of reducing the time and effort required for the work.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

[Figure 2] Explanatory diagram showing the message interface of this embodiment

[Explanation of symbols]

11 Input device 12 Text data editing section (terminal device) 13
Message analysis section (terminal device) 14A, 14B Communication control device 15 Non-volatile memory 16 Disk (terminal device) 17 Text data editing section (center machine)
18 Message analysis department (center machine) 19
Disk (center machine) 21 Start request message 22 Start response message 23 Data request message 24 Data response message 25 End notification message

Claims (1)

[Claims] Claim 1: A center machine, a communication control device that performs data communication between the center machine and a terminal device, an input device that inputs a file name at the start of processing, and a device that stores data sent from the center machine. It is equipped with an auxiliary storage device to store data, and a non-volatile memory to store file names and data sequence numbers being processed. A file transmission system characterized in that the file transmission system restarts from the data at the time of interruption according to the data stored in the nonvolatile memory and the data sequence number stored in the nonvolatile memory.