JPH1153311A - Circuit substitute control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the transmission/reception reliability of messages by using a substitute circuit for a faulty circuit by means of a message transmission/reception mode conversion table. SOLUTION: If the transmission is impossible due to a circuit fault, a transmission processing part 3 notifies a transmission message editing processing part 2 of the message remaining in a transmission wait message sequence 8 together with notification of the fault and then clears the sequence 8 of the faulty circuit. The part 2 retrieves the untransmitted message that is notified by the part 3 out of a transmission message file 7. Then the part 2 retrieves again a circuit definition table 4 with the destination used as a key and selects a transmission circuit. A circuit state table 6 is retrieved with the selected transmission circuit used as a key to select a transmittable circuit, and the relevant message is edited based on a circuit form table 5. The edited message is sent again to the part 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line substitution control method in the event of a line failure in an online system having a plurality of computers connected by lines defined by various message transmission / reception methods.

[0002]

2. Description of the Related Art As an on-line system for automatically switching lines when a line failure occurs, for example, Japanese Patent Laid-Open No. 7-849.
Japanese Patent Publication No. 12 proposes an online system in which two same lines are prepared between a general-purpose computer and a terminal device, and line switching is automatically performed when a line failure occurs (refer to "First Conventional System"). "). For example, Japanese Patent Application Laid-Open No. 5-298255 proposes a message output control function capable of retransmitting a message whose transmission has not been completed without losing a message whose transmission has not been completed when the system is switched to a standby system due to a failure. In this method, message output is substituted between a plurality of terminals connected by a plurality of lines having the same transmission / reception mode ("second conventional method").
).

[0003]

The above-mentioned conventional system has the following problems.

A first problem is that in the first conventional method, it is necessary to prepare two or more lines having the same transmission / reception mode, and it is not possible to perform line substitution using lines of different transmission / reception modes. ,That's what it means.

The reason is that there is a one-to-one correspondence between computer terminals.
This is because the connection is not made and the connection is not transmitted to the target terminal via another terminal, so that alternative transmission / reception cannot be performed via a line having a different line format.

A second problem is that, even in the above-mentioned second conventional system, similarly, it is not possible to perform message substitution by terminals having different line formats.

[0007] The reason is that a message addressed to a terminal is replaced by another terminal among a plurality of terminals connected in the same transmission / reception mode. Therefore, an alternative display of a message using a different line having a different line format is performed. I can't do that, depending on what.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to provide an on-line system comprising a plurality of computers interconnected by a plurality of lines having different transmission / reception modes. It is an object of the present invention to provide a line substitution control system which sometimes performs line substitution using another line to improve the reliability of message transmission / reception.

[0009]

In order to achieve the above object, a circuit alternative control method according to the present invention provides a method for message communication between computers in an online system, in which a message transmission / reception mode is different for each line, Another line is used by using the message transmission / reception format conversion table, thereby replacing the line.

The present invention also provides a line definition table defining a transmission line name for each destination and an alternative line in the event of a line failure in an online system comprising a plurality of computers connected by lines having different message transmission / reception modes. And a line format table that defines a transmission / reception format for each line. In the event of a line failure, the message is edited into a format addressed to another computer by referring to the line definition table and the line format table, and transmitted via a line of another computer. And sending it to the destination computer.

The present invention preferably provides a line status table holding line status, a transmission line name for each destination, and a line status table in an online system in which message transmission / reception modes differ for each line in message communication between computers. A line definition table defining an alternative line at the time of a line failure, and, when transmitting a message to a destination computer, selecting a line capable of transmitting the message by referring to the line state table and the line definition table; A means for editing a transmission message according to the line with reference to the format table, and a means for transmitting the edited message from the selected line is provided.

[0012]

Embodiments of the present invention will be described below. In a preferred embodiment, the circuit alternative control method of the present invention includes a table storing an alternative line at the time of a line failure and a line type table storing a transmission / reception mode for each line. This is to realize a line replacement in the event of a failure between transmission and reception lines.

More specifically, the transmission message editing processor (2 in FIG. 1) refers to the line definition table (4 in FIG. 1) and the line format table (5 in FIG. 1) when a line failure occurs, and The data is edited again in the transmission line format and delivered to the transmission processing unit (3 in FIG. 1).

In a preferred embodiment of the line substitution control system of the present invention, the transmission message editing processing section (2 in FIG. 1) includes a line state table (6 in FIG. 1) holding line states, A line definition table (4 in FIG. 1) that defines which line is to be replaced when a failure occurs, and a line format table (FIG. 1) that defines the message transmission / reception format of each line
5), a transmission message file (FIG. 1) for storing the transmission message received from the business processing unit (1 in FIG. 1).
7) is provided.

The transmission processing unit (3 in FIG. 1) has a transmission queue message queue (8 in FIG. 1) for each line, and performs transmission processing to an actual line.

The business processing unit (1 in FIG. 1) passes a message addressed to another system to the transmission message editing processing unit (2 in FIG. 1).

Transmission message editing processing unit (2 in FIG. 1)
After registering the message passed from the business processing unit (1 in FIG. 1) in the transmission message file (7 in FIG. 1), the line status table (6 in FIG. 1) and the line definition table (FIG. 1)
Referring to 4), the transmission line is selected, and the transmission message is edited with reference to the line format table (5 in FIG. 1).
The edited message is added with the identification of the transmission line and passed to the transmission processing unit (3 in FIG. 1).

The transmission processing unit (3 in FIG. 1) registers the message received from the transmission message editing processing unit (2 in FIG. 1) in a transmission queue message queue (8 in FIG. 1) of the corresponding line. After the transmission is completed normally, the message is deleted from the transmission queue, and the transmission message editing unit (2 in FIG. 1) is notified of the normal transmission completion of the message.

Transmission message editing unit (2 in FIG. 1)
Deletes the notified message from the transmission message file (7 in FIG. 1).

On the other hand, if transmission on the selected line is not possible due to a line failure, the transmission processing unit (3 in FIG. 1) notifies the transmission message editing processing unit (2 in FIG. 1) of the line failure, The transmission message editing processor (2 in FIG. 1) transmits the line status table (6 in FIG. 1) to the transmission processor (3 in FIG. 1).
Change according to notice from.

The transmission processing unit (3 in FIG. 1)
The message remaining in the transmission queue of the corresponding line is notified to the transmission message editing processing unit (2 in FIG. 1). The transmission message edit processing unit (2 in FIG. 1) extracts the notified transmission waiting message from the transmission message file (7 in FIG. 1), and extracts the line status table (6 in FIG. 1) and the line definition table (6 in FIG. 1). With reference to 4), an alternative circuit is selected, the message is edited in the alternative circuit format, and the message is transferred again to the transmission processing unit (3 in FIG. 1).

[0022]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention;

FIG. 1 is a diagram showing the configuration of an embodiment of the present invention. Referring to FIG. 1, in the online system according to the present embodiment, three computers A, B, and C are interconnected by circuits L1, L2, and L3, respectively.

Each of the computers A, B, and C includes a business processing unit 1, a transmission message processing unit 2, a transmission processing unit 3, a circuit definition table 4, a line format table 5, a line status table 6, a transmission message file 7, A transmission queue 8 for each line is included. Although FIG. 1 shows only the internal configuration of the computer A, the other computers B and C include the same configuration.

As shown in FIG. 2A, the line definition table 4 contains a destination system name of a transmission message, a line name to be transmitted to the destination system, and an alternative line when the line has failed. Name is defined.

The line format table 5, as shown in FIG. 2 (b), is a table defining transmission and reception formats when transmitting a message to each line.

As shown in FIG. 2C, the line status table 6 is a table in which the connection status of the line is registered, and includes a line name and its line status (normal / failure).

When a message addressed to another computer is generated, the business processing unit 1 sends the destination and the message to the transmission message editing processing unit 2.

The transmission message editing processing unit 2 registers the destination and the message received from the business processing unit 1 in the transmission message file 7, searches the line definition table 4 using the destination as a key, and selects the line to which the message is transmitted. I do. FIG. 2D is a diagram showing an example of the contents of the transmission message file 7, and includes the destination of the transmission message, the message text, and status information (transmitting, waiting for transmission, etc.).

The line status table 6 is searched using the selected line as a key to check the line status. Then, if transmission is not possible due to a failure or the like in the line state of the selected line, an alternative circuit is selected and the line state is checked in the same manner. If there is no line that can be transmitted, the status of the message in the transmission message file 7 is set to “waiting for transmission”.

If there is a line that can be transmitted, the line format table 5 is searched using the line as a key, the transmission / reception format of the message is checked, the message is edited, and the message is sent to the transmission processing unit 3 to transmit the transmission message file. 7, the status of the message is set to “transmitting”.

The transmission processing unit 3 registers the received message in the transmission queue 8 of the corresponding line. The transmission processing unit 3 transmits a message in the order of the transmission queue 8 for each line.

After the message has been transmitted normally, the message is deleted from the transmission waiting message queue 8, and the transmitted message is notified to the transmission message editing processing unit 2, and the transmission message editing processing unit 2 deletes the message. Delete from transmission message file 7.

On the other hand, if the transmission cannot be performed due to a line failure, the transmission processing unit 3 notifies the transmission message editing processing unit 2 of the failure notification and the message remaining in the transmission waiting message queue 8, and Clear the transmission queue 8.

The transmission message processing unit 2 searches the transmission message file 7 for an untransmitted message notified from the transmission processing unit 3, searches the line definition table 4 again using the destination as a key, and selects a transmission line. Then, using the selected transmission line as a key, the line state table 6 is searched to select a line that can be transmitted, and the corresponding message is edited with reference to the line format table 5. The edited message is transferred to the transmission processing unit 3 again.

FIG. 2A shows the line definition table 4 of the computer A.
The destination computers B and C are defined as L1, L2 as their transmission lines, and L2, L1 as alternative lines. That is, when the line L1 to the destination computer B has a line failure, the line L2, which is an alternative line, is selected, and the transmission message editing processor 2 refers to the line format table 5 to generate a message for the destination computer C of the line L2. After editing, the message is transmitted from the line L2 to the computer C via the transmission processing unit 3, and the message is transmitted from the computer C to the computer B via the line L3, whereby the message is transmitted to the destination B. Become.

In the above embodiment, an on-line system in which three computers are connected has been described as an example. However, the present invention is not limited to this, and is applicable to an on-line system in which an arbitrary number of computers are connected. Of course, it is possible.

[0038]

As described above, according to the present invention,
In an online system composed of multiple computers connected by lines with different message transmission / reception formats, it is possible to substitute message transmission using another line when a line failure occurs, and to improve the reliability of message transmission / reception. It works.

The reason is that, in the present invention, each computer has a line substitution table, and can use a plurality of substitution lines. In addition, even when each line has a different transmission / reception mode, the line can be replaced by the line format table.

[Brief description of the drawings]

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

FIG. 2 is a diagram illustrating an example of the contents of a table and the like according to an embodiment of the present invention.
FIG. 3B is a diagram illustrating an example of the contents of a transmission message file, FIG.

[Explanation of symbols]

 A, B, C Computer L1, L2, L3 Line 1 Business processing unit 2 Transmission message editing processing unit 3 Transmission processing unit 4 Line definition table 5 Line format table 6 Line state table 7 Transmission message file 8 Transmission queue message queue for each line

Claims (4)

[Claims] In a message communication between computers in an online system, when a transmission / reception mode of a message differs for each line, when a line failure occurs, another line is used by using a message transmission / reception format conversion table. A line substitution control method characterized by performing substitution. 2. An online system comprising a plurality of computers connected by lines having different message transmission / reception modes, a line definition table defining a line name for each destination and an alternative line in the event of a line failure, and a line definition table for each line. In the case of a line failure, a message is edited in a format addressed to another computer by referring to the line definition table and the line format table, and the destination is transmitted via the line of the other computer. A line alternative control system that transmits data to a computer. 3. An on-line system including a plurality of computers interconnected by lines having different message transmission / reception modes, a line status table holding line status, a line name for each destination, and a failure of the line. A line definition table that defines the alternative line of the line, a line format table that defines the message transmission / reception format of each line, and a message referring to the line state table and the line definition table when transmitting a message to a destination computer. Means for selecting a line capable of transmitting the message, editing the transmission message according to the line by referring to the line format table, and transmitting the edited message from the selected line. A line substitution control method characterized by the following. 4. When the message cannot be transmitted on the selected line due to a line failure or the like, the state of the line in the line state table is updated, and the line state table and the line definition table are referred to again. And selecting a substitute line, editing the message in the substitute line format, and transmitting the message from the substitute line.