JPH06250948A - File transfer interface conversion device - Google Patents

Abstract

PURPOSE:To easily connect processors having different transmission procedures without incorporating an application program for transmission procedure conver sion into the processors themselves. CONSTITUTION:The respective conditions of the transmission procedures in the respective processors 1a and 1b are stored in a file transmission condition file 5. Plural transmission/reception means 7a and 7b which are connected to the respective processors 1a and 1b through transmission lines 2a and 2b and which transmit/receive data inputted/outputted to/from the respective processors 1a and 1b in accordance with the transmission procedure conditions corresponding to the processors stored in the file transmission condition file 5 are provided, and data conversion means 8a and 8b convert data from a transmission source processor, which is transferred to the respective transmission/reception means 7a and 7b, into a data format corresponding to a transmission destination processor in accordance with the transmission procedure condition of the file transmission condition file 5. Furthermore, control information transmitted to the transmission/reception destination processor by a file transfer protocol execution means 9 is generated or eliminated in accordance with the transmission procedure condition of the file transmission condition file 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a file transmission interface conversion device which enables file transfer between processing devices having different file data transmission procedures.

[0002]

2. Description of the Related Art A computer system comprising a host computer and a terminal computer connected to the host computer via a transmission line, a monitoring system comprising a central monitoring device and a measuring device connected to the central monitoring device, In an information processing system, etc. where multiple independent computers are connected,
Data of files provided in each computer or each device is frequently transferred to each other.

When file data is transmitted and received between the computers, it is executed according to a predetermined constant transmission procedure. Therefore, the transmission procedure set in each computer must match.

Therefore, computers having different transmission procedures cannot be connected to each other. For example, when connecting a processing device that has a processing function that is absolutely necessary afterwards to a system that is already configured with a large number of processing devices such as host computers and terminal devices that have the same transmission procedure, If the transmission procedure of the processing device added from is different from the transmission procedure of the system, it cannot be handled.

Conventionally, when such a case occurs, an application program for adapting to the transmission procedure of the other processing device is installed in the processing device to be connected later.

[0006]

However, even when the application program for adjusting the transmission procedure is incorporated in either one of the processing devices as described above, the following problems still remain.

That is, it takes a lot of labor and cost to create and install an application program for adjusting the transmission procedure for each processing device. In particular, when a new application program is to be incorporated into an already completed measuring device or the like, it is necessary to disassemble and reassemble the measuring device, which is impractical in view of work time and cost.

Further, even if the application programs are incorporated and the transmission procedures are matched with each other, if a transmission error occurs during the process of transmitting file data between the processing devices, the error occurs. There is no security function for data sent and received when it occurs. Therefore, when a data transmission abnormality occurs, there is a problem that important data is lost.

Furthermore, it is necessary to separately create an application program for preventing data disappearance due to this transmission abnormality and incorporate it into each processing device according to the above-mentioned procedure. Therefore, the work efficiency of system construction is further reduced.

The present invention has been made in view of the above circumstances, and by providing a file transmission condition file for storing each condition of the transmission procedure in each processing device between the processing devices in advance, each processing device is provided. File data sent from the device can be automatically sent to the other processing device by the transmission procedure corresponding to the other processing device, and even if the processing devices have different transmission procedures, transfer of file data between them Therefore, it is an object of the present invention to provide a file transfer interface conversion device capable of easily connecting processing devices having different transmission procedures.

Further, in addition to the above object, it is another object of the present invention to provide a file transfer interface conversion device capable of preventing data disappearance due to an abnormality even if an abnormality occurs in the data transmission process.

[0012]

In order to solve the above problems, in the file transfer interface conversion device of the present invention, a file transmission condition file storing each condition of the transmission procedure in each processing device and transmission to each processing device. A plurality of transmission / reception means connected to each other through a path and transmitting / receiving data input / output to / from each processing apparatus according to the transmission procedure condition corresponding to the corresponding processing apparatus stored in the file transmission condition file, and transferred to each transmission / reception means. Data conversion means for converting data from the source processing device into a data format corresponding to the destination processing device according to the transmission procedure condition of the file transmission condition file, and transmitting to the destination processing device according to the transmission procedure condition of the file transmission condition file It is equipped with a file transfer protocol execution means for creating or deleting control information. .

In the file transfer interface conversion device of another invention, in addition to the above-mentioned means, a backup file for storing transmission / reception data input / output to / from each transmission / reception means when an abnormality occurs, and a backup file when the abnormality is recovered are provided. An abnormal backup means for re-inputting the stored transmission / reception data to each transmission / reception means.

[0014]

According to the file transfer interface conversion device thus configured, each condition of the transmission procedure adopted in all the processing devices connected to this file transfer interface conversion device is included in the file transmission condition file. Is stored corresponding to each processing device.

Then, for example, when the file data is transmitted to the file transfer interface conversion device of the present invention by designating the destination processing device from any processing device, the transmitting / receiving means connected to this processing device transmits the file transmission condition file. The file data is received according to the transmission procedure condition corresponding to the processing device. The file data received by the transmitting / receiving means is transferred to the next data converting means. The data conversion means reads the condition of the transmission procedure of the destination processing device from the file transmission condition file and converts the input data into a data format specified by the transmission procedure of the destination processing device.

Further, the file transfer protocol means creates or deletes control information to be transmitted to the source processing device or the destination processing device. In other words, when the transmission procedure of the source processing device sends file data to the destination processing device, it is specified that a reception response is to be received from the destination processing device, and the transmission procedure of the destination processing device specifies that the reception response is received. If it is specified that no response is sent to the file data, the file transfer protocol means creates a receipt response and sends it to the source processing device.

Further, when the destination processing device receives file data, if a particular start signal or end signal is required before and after the file data (text data), the file transfer protocol means adds the signal. . Further, when an unnecessary signal is added to the destination processing device from the source processing device, the signal is deleted.

After the data format is converted by the data converting means and the control information is created or deleted by the file transfer protocol means, the file data is transmitted to the transmitting / receiving means to which the destination processing device is connected. The transmitting / receiving means transmits the received file data to the destination processing device according to the conditions of the transmission procedure of the destination processing device read from the file transmission condition file.

Further, in another invention, the file data transmitted / received by the transmitting / receiving means is stored in a backup file when some abnormality occurs. Therefore, at the time of abnormal recovery, the data recorded in this backup file is retransmitted and received.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a schematic diagram showing a schematic configuration of a computer system in which the file transfer interface conversion device of the embodiment is incorporated.

For example, the file transfer interface conversion device 3 of the embodiment is connected via a transmission line 1a, 2a between a high-order device 1a as a processing device including a host computer and a low-order device 1b including a terminal computer. There is. A console section 4 including a CRT display device 4a and a keyboard 4b is connected to the file transfer interface conversion device 3.

The file transfer interface conversion device 3 is composed of a kind of computer. As shown in FIG. 1, for example, a plurality of files formed on a hard disk device (HD) for storing various information and a program are stored. It is composed of multiple parts (tasks) formed by a soft method.

In the file transmission condition file 5, the conditions of the file data transmission procedure adopted by the upper device 1a and the lower device 1b connected to the file transfer interface conversion device 3 correspond to the respective devices 1a, 1b. It is attached and remembered.

Further, the backup file for reception 6a
And a backup file 6b for transmission are provided. In the backup file for reception 6a, the host device 1
The text data as file data received from a and the lower device 1b is written in time series. Similarly, the text data to be transmitted to the upper device 1a and the lower device 1b is written in time series in the transmission backup file 6a. In addition, each backup file 6a, 6b
Has a fixed storage capacity, old data is discarded.

Upper transmitter / receiver 7a and lower transmitter / receiver 7b
When the data is received from the upper device 1a and the lower device 1b, the condition of the transmission procedure corresponding to each of the transmission source devices 1a and 1b is read from the file transmission condition file 5, and the data is transmitted to the corresponding devices 1a and 1b. Signal is established between them. Then, the received data is transferred to the next higher-order data conversion unit 8a, 8b.
Send to. In addition, the upper transmitter / receiver 7a and the lower transmitter / receiver 7b read the data received from the respective data converters 8a and 8b from the file transmission condition file 5 and the conditions of the transmission procedure corresponding to the respective devices 1a and 1b of the transmission destination. hand,
The data is transmitted to the corresponding devices 1a and 1b via the respective transmission lines 2a and 2b.

The upper data conversion unit 8a and the lower data conversion unit 8b, when transmitting the data received from the transmission / reception units 7a and 7b to the destination devices 1b and 1a, indicate whether or not the format of the data needs to be converted. Then, the conversion format when necessary is read from the file transmission condition file 5. Then, the data (text) is converted according to this conversion format. The converted data (text) is transferred to the file transfer protocol unit 9.

The file transfer protocol unit 9 receives data from the data conversion units 8a and 8b to the destination device 1b. When the data to be transmitted to 1a is received, the file transmission condition file 5
From the source devices 1a and 1b and the destination device 1b. The presence / absence of control (notification) information to be transmitted to 1a is read. And
Based on the read information, the control information to be transmitted to the transmission source device 1a, 1b or the transmission destination device 1b, 1a is created or deleted.

More specifically, for example, when the transmission procedure of the transmission source devices 1a and 1b transmits data (text) to the transmission destination devices 1b and 1a, the transmission destination devices 1b. 1
a is specified to receive an acknowledgment (ACK), and the destination device 1b. If it is specified in the transmission procedure of 1a that no response is sent to the received data (text), this file transfer protocol unit 9
Creates a receipt response (ACK) and transmits the source device 1a, 1
Send to b.

The destination device 1b. When 1a receives text, if a specific start signal (STX) or end signal (ETX) is required before and after this text,
The file transfer protocol unit 9 adds the signal.
Further, if unnecessary signals are added to the destination devices 1b and 1a from the source processing devices 1a and 1b, those signals are deleted.

The conditions of each transmission procedure stored in the file transmission condition file 5 and which device 1a or 1b each transmission procedure corresponds to are determined by the file transmission condition creating unit 10 to which the console device 4 is connected. Created by. Therefore, the computer system designer (operator)
Connects the respective devices 1a and 1b to the respective transmission / reception units 7a and 7b and uses the keyboard 4b of the console unit 4 to
The type of transmission procedure adopted in each of the devices 1a and 1b may be registered in the file transmission condition file 5.

The abnormal time backup control unit 11 takes in each file data (received data) received from the upper device 1a and the lower device 1b by the upper transmitter / receiver 7a and the lower transmitter / receiver 7b at the time of occurrence of an abnormality, and chronologically And stores it in the backup file for reception 6a. At the same time, the backup control unit 11 at the time of an abnormality, when an abnormality occurs,
And the lower transmitter / receiver 7b to the upper device 1a and the lower device 1
Each file data (transmission data) to be transmitted to b is fetched and stored in the transmission backup file 6b in time series.

Further, the abnormal backup controller 11 is
When an abnormal recovery notification is input from the abnormal recovery processing unit 12, each file data stored in each backup file 6a, 6b is sent to each transmitting / receiving unit 7a, 7b. The error recovery processing unit 12 responds to an error recovery operation by the operator in the console unit 4 and an abnormal time backup control unit 11
Send an error recovery notification to.

When a trace command is input from the console unit 4, the trace processing unit 13 sequentially reads the reception data and the transmission data stored in the backup files 6a and 6b to read the CRT display device 4a of the console unit 4a.
Display in chronological order. FIG. 3 is a flowchart showing the operation of the entire file transfer interface conversion device shown in FIG.

When the flow chart starts and, for example, the data from the host device 1 is input to the host transceiver 7a (P1),
The operation mode is set to the upper mode, the transmission condition set in the upper device 1a is read from the file transmission condition file 5 (P2), and the corresponding data is received. Then, the file transfer protocol execution unit 9 checks whether a response to the higher-level device 1a is necessary or a notification to the lower-level device 1b is necessary (P3). If necessary, a response text or a notification text is created and transmitted to the higher-level device 1a or the lower-level device 1b via the higher-level transmission unit 7a or the lower-level transmission unit 7b. If a transmission error occurs, the corresponding text data is written in the reception backup file 6a.

The lower device 1 of the transmission destination for the transmitted notification
When there is a response from b (P5), the data conversion unit 8a creates text data corresponding to the destination device and transmits it to the destination lower device 1b via the lower transmission / reception unit 7b. Then, if a transmission error occurs, the corresponding text data is written in the transmission backup file 6a. Thus, the transmission process of one file data from the upper device 1a to the lower device 1b is completed.

Next, when the lower transmission / reception unit 7b receives data from the lower device 1b (P7), the operation mode is set to the lower mode. Then, the process proceeds to P2 to read the transmission condition set in the lower device 1b from the file transmission condition file 5.

Then, in the file transfer protocol execution unit 9, whether or not a response to the lower device 1b is necessary,
Alternatively, it is checked whether or not there is a need to notify the host device 1a (P3). If necessary, a response text or a notification text is created and transmitted to the lower device 1b or the upper device 1a via the lower transmission unit 7b or the upper transmission unit 7a. If a transmission error occurs, the corresponding text data is written in the reception backup file 6a.

Upper device 1 of the transmission destination for the transmitted notification
If there is a response from a (P5), the data conversion unit 8b creates text data corresponding to the higher-level device 1a and transmits it to the higher-level device 1a via the higher-level transmission / reception unit 7a. Then, if a transmission error occurs, the corresponding text data is written in the transmission backup file 6a. Thus, the lower device 1
The process of transmitting one file data from b to the higher-level device 1a ends.

Further, in P8, when an abnormality recovery operation is executed in the console section 4, the abnormality recovery processing section 12 is activated and each data stored in the reception backup file 6a and the transmission backup file 6b. Is applied to each of the transmitter / receivers 7a and 7b (P9). Each transmitter / receiver 7
a and 7b, the transmission data input from the transmission backup file 6b is transmitted via the transmission lines 2a and 2b to the transmission destination devices 1b. Send to 1a.

The transmitting / receiving sections 7a and 7b send the received data input from the receiving backup file 6a to P2.
After that, the data is transmitted to the transmission destination devices 1b and 1a through the same processing as the data received legally.

When the trace operation is executed in the console section 4 in P10, the received data and the transmission data stored in the backup files 6a and 6b are displayed in the CRT display device 4a in the console section 4 in P11. indicate.

Further, in P10, the console section 4
When the conditions of the transmission procedure of each device 1a, 1b are designated by the file transmission condition file 5,
Write to.

In the case of the file transfer interface conversion device thus configured, each device 1 such as a computer connected to each transmission / reception section 7a, 7b of this file transfer interface conversion device 3 is set in the file transmission condition file 5.
A plurality of transmission procedures expected to be adopted by a and 1b and various conditions for connecting the transmission procedures are set in advance. Then, when the file transfer interface conversion device 3 is actually connected between the operations,
The type of transmission procedure adopted by each of the connected devices 1a and 1b may be designated from the console section 4.

Therefore, it is not necessary to create and incorporate a special application program in each of the devices 1a and 1b for matching the transmission procedure adopted by each of the destination devices 1b and 1a. As a result, when a large number of devices are connected by a transmission line to construct one information processing system, if one file transfer interface conversion device 3 is prepared, the transmission procedure adopted can be taken into consideration. Instead, the device to be incorporated in this system can be selected and set, for example, in consideration of only the functional aspect.

When an abnormality occurs during transmission,
Backup file 6 for each data that could not be sent or received
It is stored and stored in a and 6b, and can be displayed on the CRT display device 4a of the console unit 4 if necessary. Therefore, the cause of the abnormal occurrence can be investigated at an early stage,
And it is possible to take measures immediately.

Furthermore, when an error recovery operation is performed from the console 4 at the time of error recovery, the data that could not be transmitted / received due to the error occurrence is backed up in the backup file 6
The data is read from a, 6b, processed for transmission and reception again, and transmitted to the destination device. As a result, the reliability of the entire system can be improved.

FIG. 4 is a diagram showing a computer system in which two types of computers 1aa and 1bb (1cc) are connected to the file transfer interface conversion device 3 of the embodiment. One computer 1aa (host computer) adopts the character synchronization BSC transmission procedure, and the other computer 1bb (1cc) (lower-level computer) employs the TCP / IP transmission procedure.

In this case, the computer 1aa, 1bb (1cc) is stored in the file transmission condition file 5 as shown in FIG.
It stores the type (name) 5a of the transmission procedure adopted by, the conditions 5b for the actual transmission procedure and presence / absence of each signal in each transmission procedure, and the data conversion information 5c between the transmission procedures.

In the computer system having such a configuration, when an inquiry (ENQ) is sent from one computer 1aa, this inquiry (ENQ) is received by the higher-order transmission / reception unit 7a. From the file transmission condition file 5, it is confirmed that the BSC transmission procedure is the character synchronization method. Then, the file transfer protocol execution unit 9 determines that it is necessary to send an affirmative response (ACKO), and returns an affirmative response (ACK0) to the computer 1aa as shown in the sequence diagram of FIG. Acknowledgment (AC
After sending K0), the request (REQ) text is transmitted from the computer 1aa to the file transfer interface conversion device 3.

File transfer interface converter 3
Requests the protocol conditions for receiving data from the request (R
EQ)-> Recognized from the set value of the text [ANS],
When it is determined that the text [ANS] response is necessary, it is recognized that the upper response notification mode is present, and the processing mode is changed. When sending a request (REQ), the transmission is completed, so after the acknowledgment (ACK1), the transmission is completed (EOT).
Send out.

In the above processing, since the signal transfer processing based on the character synchronization system between the high-order computer 1aa and the file transfer interface conversion apparatus 3 is completed, next, the file transfer interface conversion apparatus 3 and the low-order computer. Signal transmission / reception processing based on the TCP / IP method is executed with 1bb.

As described above, it is possible to transfer file data between the computers 1aa and 1bb (1cc) adopting different transmission procedures without using a special application program.

The present invention is not limited to the above embodiments. In the apparatus of the embodiment, the case has been described in which the file data can be transmitted and received between the computers 1aa and 1bb (1cc) adopting two types of transmission procedures.

However, by storing three or more types of transmission procedures and the relationships between the transmission procedures in the file transmission condition file 5, as shown in FIG.
It is possible to transfer file data between three or more computers that employ more than one type of transmission procedure.

[0055]

As described above, according to the file transfer interface conversion device of the present invention, the file transmission condition file for storing each condition of the transmission procedure in each processing device is provided in advance between the processing devices such as computers. , The file data transmitted from each processing device is automatically transmitted to the other processing device by a transmission procedure corresponding to the other processing device. Therefore, even processing devices having different transmission procedures can transfer file data to each other, and processing devices having different transmission procedures can be easily connected to each other, so that a large number of processing devices can be connected by a transmission line. The degree of freedom in selecting each information processing device in constructing the information processing system is increased.

Further, since the backup file is provided, even if an abnormality occurs in the data transmission process, the data disappearance due to the abnormality can be prevented and the reliability of the entire system can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a file transfer interface conversion device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing an entire computer system in which the apparatus of the embodiment is incorporated.

FIG. 3 is a flowchart showing the operation of the apparatus of the embodiment.

FIG. 4 is a schematic diagram showing an entire computer system in which a file transfer interface conversion device according to another embodiment of the present invention is incorporated.

FIG. 5 is a diagram showing stored contents of a file transmission condition file incorporated in the apparatus of the embodiment.

FIG. 6 is a sequence diagram showing a signal flow in a computer system incorporating the apparatus of the embodiment.

FIG. 7 is a schematic diagram showing an entire computer system in which a file transfer interface conversion device according to still another embodiment of the present invention is incorporated.

[Explanation of symbols]

1a ... Upper device, 1b ... Lower device, 3 ... File transfer interface conversion device, 4 ... Console unit, 5 ... File transmission condition file, 6a ... Reception backup file, 6b ... Transmission backup file, 7a ... Upper transmission / reception unit, 7b ... Lower transmission / reception unit, 8a ... Upper data conversion unit, 8b ... Lower data conversion unit, 9 ... File transfer protocol execution unit, 10 ... File transmission condition creation unit, 11 ...
Abnormality backup control unit, 12 ... Abnormality recovery processing unit, 1
3 ... Trace processing unit.

Claims (2)

[Claims] 1. A file transfer interface conversion device in which file data transmission procedures are inserted between processing devices different from each other and file data is transferred between the processing devices, wherein each condition of the transmission procedure in each processing device is satisfied. And a transmission procedure corresponding to the corresponding processing device stored in the file transmission condition file, which is connected to each of the processing devices via a transmission line A plurality of transmitting / receiving means for transmitting / receiving according to the conditions, and a data converting means for converting the data from the source processing device to be transferred to each transmitting / receiving means into a data format corresponding to the destination processing device according to the transmission procedure condition of the file transmission condition file And send and receive according to the transmission procedure condition of the file transmission condition file File transfer interface conversion device and a file transfer protocol execution means for creating or deleting the control information to be transmitted to the processing unit. 2. A backup file storing transmission / reception data input / output to / from each of the transmission / reception means when an abnormality occurs, and a transmission / reception data stored in the backup file to be re-input to each transmission / reception means when the abnormality is recovered. The file transfer interface conversion device according to claim 1, further comprising backup means.