JPH03141757A - Data communication system - Google Patents

Abstract

PURPOSE:To shorten communication time by interposing a terminal, which is equipped with respective means for communication line selection, transfer order data generation, data file decomposition, file identification, data file synthesization and sending-out, between a communication terminal and a line network. CONSTITUTION:While receiving the capacity information of a transfer data file, a communication line selecting means S2 secures/reserves a line. A transfer means data generating means S3 approves the call number of the line secured/ reserved from an output part S1 and the capacity and name of the transfer data file, makes transfer order data and stores the data in a memory 4. A decomposition part S4 decomposes the transfer data file according to the transfer order and sends the file through a transmission part S5 to the secured/reserved line together with the order file. On the other hand, a file identification part V2 identifies the respective data files of the transfer data and the decomposition from the received data and a synthesizing part V4 synthesizes the identified decomposition data file with the identification information and sends it out through an input part V5 to the communication terminal. Thus, by interposing this terminal, the communication time is shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a data communication system, and more particularly, to a data communication system in which data files are disassembled and transferred over multiple lines.

(Prior art) Data file transfer via a communication line has conventionally been performed through a series of steps on the sending and receiving sides: connecting the line, establishing a data link, transferring data, opening the data link, and disconnecting the line. to complete the data file transfer.

- For example, as shown in FIG. 4, a data file f is transmitted from a terminal (hereinafter referred to as a communication terminal) U3 having a communication function via a communication line SC1, a communication line network N, and a communication line rw,
Received by communication terminal R1.

In FIG. 4, the received data file is indicated by f''.

Data files f and fo are the same.

Also, 130. 1 for international standards and recommendations by CCITT! The based packet switching method requires data disassembly/assembly (
Data file transfer is realized using PAD) processing.

(Problem to be Solved by the Invention) However, in the non-packet method, the communication line and communication terminal are occupied for data file transfer until the communication line is established and the data file transfer is completed. Therefore, there is a problem in that as the amount of transferred data increases, the occupancy rate of communication lines and communication terminals increases.

Furthermore, in the case of a communication method that realizes data transfer by disassembling a transfer data file, selecting an appropriate communication line to use each time the disassembled data is transferred, and keeping a series of history records, it is necessary to secure a communication line. There was a problem that it became a rule and caused a time loss.

On the other hand, in the packet method, after converting the data into packets,
Since the communication line is appropriately selected and transferred, the occupancy rate of the communication line is lower than that of the non-Pakent method, but there is a problem in that capacity loss occurs due to the addition of header information to the data area of each packet. .

The present invention solves the above problems by disassembling a data file and transferring it over multiple communication lines, saving time spent on data file transfer, and reducing the amount of header information specified by the packet method in one packet. We aim to provide an efficient data communication method in the existing communication line environment, by comprehensively saving transferred data against the capacity loss added during transfer, by setting communication lines at the time of transfer, and by batch processing transfers by making reservations. purpose.

(Means for Solving the Problems) The present invention provides a data communication method that includes a communication line selection means for securing or reserving a plurality of usable communication lines in response to capacity information of a transfer data file, and at least a communication line that is secured or reserved. Transfer procedure data generation means that generates a transfer procedure data file based on line call number information, capacity and name information of the transfer data file, and decomposes the transfer data file according to the transfer procedure accompanying the generated transfer procedure data file. a data file decomposition means for
A transmission means for transmitting the transfer procedure data file and the disassembled disassembly data file to a secured or reserved communication line, and a file identification means for identifying the transfer procedure data file and the disassembly data file from among the data transmitted from the communication line. and a data file synthesizing means for synthesizing the decomposed data file identified by the file identifying means into a data file in accordance with the information of the transfer procedure data file identified by the file identifying means, and sending the synthesized data file to a communication terminal. The present invention is characterized in that a data file division/synthesis terminal equipped with sending means is interposed between a communication terminal and a communication line network to transfer data files.

(Operation) When transferring a data file, the transfer data file is disassembled according to the transfer procedure accompanying the transfer procedure data file generated by the transfer procedure data file generation means, and is transferred via multiple communication lines secured or reserved in advance. Procedure pig files and disassembly data files are sent.

In addition, the transmitted data is accompanied by the information of the transfer procedure data file identified by the file identification means,
The decomposed data file identified by the file identifying means is synthesized into a data file by the data file synthesizing means, and the synthesized data file is sent to the communication terminal by the sending means.

(Example) The present invention will be explained below using examples.

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

FIG. 1 shows a data file decomposition/synthesis terminal that is connected between a communication terminal and a communication line network and has a function of decomposing and synthesizing data files.
Hereinafter, it will be referred to as FCD.

The FCD includes an interface T1 with a communication terminal, an interface L with a communication line, an output section S that receives and outputs a data file sent from the communication terminal via the interface T, and an output section S. a communication line selection unit S2 that secures or reserves a plurality of usable communication lines in response to the capacity information of the data file outputted through the communication line selection unit S2;
a transfer procedure data file generation unit S3 that generates a transfer procedure data file based on information on at least the call number of the communication line secured or reserved for transfer, the capacity and name of the data file to be disassembled; A data file disassembly section S4 disassembles the data file outputted from the output section SI into a plurality of files according to a generated transfer procedure for transfer, and a communication line selection section S2 secures or reserves the disassembled data file and the transfer procedure data file. a transmitter S that transmits to the communication line via an interface L; a receiver VI that receives the decomposition data file and the transfer procedure data file from the communication line via the interface L; and data received by the receiver V1. Identification means (2) for identifying a decomposed data file and a transfer procedure data file from among the files; It is equipped with a procedure decoding section V3, a data file synthesis section 4 for synthesizing received decomposed data files in accordance with the output from the procedure decoding section V3, and a working memory M necessary for the above series of operations. ing.

In FIG. 1, solid lines indicate the flow of processing when transmitting a data file, and broken lines indicate the flow of processing when receiving a data file. Furthermore, the dashed line indicates the flow when the FCD is bypassed.

The operation of the FCD configured as described above will first be explained in the case of transmission.

Information such as the capacity and name of the transfer data file sent via the interface T1 on the communication terminal side is output to the output section S.
1, the communication line selection section S2 receives the communication line selection section S2, and the communication line selection section S2 searches for and secures an available communication line. If there is no usable communication line, a communication line to be used is set (hereinafter referred to as reservation setting).

Following the reservation or reservation setting of the communication line to be used, the transfer procedure data file is generated by the transfer procedure data file generation unit S3 based on information such as the capacity and name of the transfer data file, the call number of the reserved/reserved communication line, and the name of the decomposed data file. is generated. The generated transfer procedure data file is temporarily stored in the working memory M.

On the other hand, the transfer data file is sequentially stored from the output unit S1 to the work memo IJM, and the transfer data file is read out from the work memory M to the data file decomposition unit S4 in accordance with the procedure according to the generated transfer procedure data.
Decomposition is performed according to the generation and transfer procedure, and the working memory M
is stored in In this specification, each decomposed data file is referred to as a decomposed data file.

After the transfer data file is disassembled, the disassembled data file and the transfer procedure data file are read from the working memory M. The read disassembly data file and transfer procedure data file are sent from the transmitter S to the interface L.
, and is transmitted to the designated transfer communication terminal using a transferable communication line secured or reserved by the communication line selection unit S2. In this case, the transfer procedure data file may be transmitted either immediately before or after the disassembly data file is transferred.

Next, the operation of the FCD will be explained in the case of reception.

The file received by the receiving unit V via the line side interface L1 is input to the file identifying unit V2,
It is identified whether the file is a transfer procedure data file or a disassembled data file. The identified transfer procedure data file is manually input to the file merging procedure decoding section (3), which deciphers the file merging procedure from the transfer procedure. On the other hand, the transfer procedure file data and disassembled data file via the file identification section v2 are stored in the working memory M, and the disassembled data files stored in the working memory M according to the decoded file synthesizing procedure are sequentially transferred to the data file synthesizing section. (2) The data files are synthesized in step 4, and the synthesized data files are sequentially stored in the working memory M. The synthesized data file in which the synthesis of the decomposed data files has been completed is read out from the working memory M and sent from the input section V5 to the designated communication terminal via the interface T1.

It is also possible to bypass the FCD and use the communication terminal-communication line direct connection route shown by the dashed line in FIG. 1, or the communication line-communication terminal direct connection route as in the past.

Next, FIG. 2 shows a specific example in which the above-mentioned FCD is connected to a communication line and a communication line network.

The specific example shown in Fig. 2 is a communication terminal (Ul, 02, (J3)).
, (R1, R2, R3, R4), communication line M4N, and communication line (s a, s b, sc), (rw,
This is an example of a ne-nodwork constructed with rx, r)', rz). The FCD concentrates communication terminals through an interface T1 on the terminal side, and an interface L on the communication line side.
, is connected to the communication line.

As an example of file transfer, from communication terminal U3 to communication terminal R
The procedure for transferring a data file to 1 is shown below. In addition, the transmission data file r and the reception data file r in the figure
° are files with exactly the same content.

The communication line selection unit S2 receives information such as the file name and capacity that is desired to be transferred from the communication terminal U3 from the output unit S via the terminal side interface T, and is used by the communication line selection unit S2. Possible lines are searched and secured. Further, if there is no line to be used, a line to be used is set.

In the example shown in Figure 2, the transmitting side lines (s a, s b
.

sc) and receiving side lines (rx, ry, rz) are lines that have been secured or are planned to be used.

Next, the transfer procedure data file generation section S3 generates transfer procedure data based on the information received from the output section S, such as the file name, capacity, and reserved/reserved lines.

FIG. 3 shows an example of the configuration of transfer procedure data. In the figure, (0
) is the field format, (1) is the transfer procedure data file generated according to (0), the transfer data file f is decomposed into three decomposed data files (dLd2, d3), and di is the line (sc-rz). Therefore, d2 and d3 are respectively transferred to the destination terminal R1 from the line (sb-ry) and the line (sa-rx).

Also, fngs'″n” is the decomposition data file II n
``n'' indicates the creation date of the decomposed data file ``nII''.

The transfer data file manually input from the human power department Sl is stored in the working memory M, and based on the transfer procedure data file, it is read out from the working memory M as needed to generate a decomposition data file (dn). , are stored in the working memory M.

Next, in accordance with the transfer procedure data, the disassembled data file is transmitted via the transmission section S to the specified terminal R1 via the interface L1 on the line side via the line that has been secured. Similarly, when a reserved line becomes available, the line is secured and the data is transmitted.

Note that the transfer procedure data file does not need to be transmitted at a specific timing, such as immediately before or after the decomposition file transfer, and the timing of transmission is not particularly limited.

In FIG. 2, as shown in the transfer procedure data in FIG. -rx), and the transfer procedure data file JF is transmitted from the line (sa-rx) to the FCD on the receiving side.

Next, in the case of the receiving side, file identification means identifies whether the file received from the receiving unit 1 via the line side interface L1 is a transfer procedure data file (jF) or a disassembled data file (dn). ■Identified by 2. The identification of the transfer procedure data file (JP) and the data file (dn) may be agreed upon in advance between the sending and receiving sides, or may be identified by a number of methods using file identifiers, identification information, etc. Yes, but there are no restrictions on the identifier or identification information.

The disassembly data files (dl, d
2, d3) and the transfer procedure data file (JF),
It is stored in the working memory M, and the transfer procedure data file (
JP), the file synthesis procedure decoder V
3, and the decomposed data files (cil, d2, c13) are synthesized by the data file synthesis section v4.

The file f' synthesized by this synthesis is equivalent to the transfer data file r, and is manually inputted from the input unit 5 to the designated terminal via the interface T.

Note that the format of the transfer procedure data file shown in FIG. 3 and the series of explanations is just one example, and is not limited to the format or components such as the contents, order, and types of fields.

(Effects of the Invention) As explained above, according to the present invention, a data file is transferred by disassembling the transfer data file into arbitrary sizes, and using a plurality of communication lines to transfer the disassembled data file and the transfer procedure data file. Because it is sent to a communication terminal, there is no need to use a special communication method such as the Pakento exchange method (however, it is possible to divide the data file and transfer it using the existing communication network. Since the data is transferred over multiple communication lines that have been secured or reserved, communication time can be shortened.

In addition, in order to generate a transfer procedure data file, disassemble the transfer data file according to the information in the transfer procedure data file, and send the transfer procedure data file together with the disassembled data file, the disassembled data file is generated along with the information in the transfer procedure data file. can be synthesized.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. FIG. 2 is a configuration diagram showing a specific example in which an FCD according to an embodiment of the present invention is connected to a communication line and a communication line network. FIG. 3 is a schematic diagram showing the format of a transfer procedure data file in an embodiment of the present invention. FIG. 4 is a block diagram showing an example of a conventional data transfer method. T,...interface, Sl...output section, S2...communication line selection section, S3...transfer procedure data file generation section, S4...data file decomposition section, S5...transmission section ,■2...receiving section, V2...
・File identification unit, ■3... File synthesis procedure decoding unit, ■4... Data file synthesis unit, ■,... Human resources department, M... Working memory, FCD... Data file decomposition unit. Synthesis terminals, U1-U3 and R1-R4
...Communication terminal, N...Communication line network, 5asb, sc
, rw, rx, ry, yz-communication lines, d1-d3...
・Disassembly data file, JF...Transfer procedure data file.

Claims (1)

[Claims] communication line selection means for securing or reserving a plurality of usable communication lines in response to capacity information of the transfer data file;
At least the call number information of the secured or reserved communication line;
A transfer procedure data generation means for generating a transfer procedure data file based on information on the capacity and name of the transfer data file; and a data file decomposition means for disassembling the transfer data file according to the transfer procedure accompanying the generated transfer procedure data file. , a transmission means for transmitting the transfer procedure data file and the disassembled disassembly data file to a secured or reserved communication line, and a file identification for identifying the transfer procedure data file and the disassembled data file from among the data transmitted from the communication line. a data file synthesizing means for synthesizing the decomposed data file identified by the file identifying means into a data file in accordance with the information of the transfer procedure data file identified by the file identifying means, and sending the synthesized data file to a communication terminal. A data communication method characterized in that a data file division/synthesis terminal equipped with a transmission means for transmitting data is interposed between a communication terminal and a communication line network to transfer data files.