JP2932856B2 - Communication status monitoring method between host computers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication status monitoring system between host computers, and more particularly to a communication status monitoring system between host computers for monitoring the communication status between host computers connected via a line.

[0002]

2. Description of the Related Art Conventionally, in this type of communication state monitoring system between host computers, the occurrence of a failure is recognized by monitoring whether or not a business message has been transmitted / received correctly.

[0003]

According to the conventional communication state monitoring method between host computers, a failure can be recognized only by monitoring whether or not a business message has been correctly transmitted and received. If a failure occurs in a state where no message is generated, there is a problem that the detection of the failure is delayed, the recovery of the failure is delayed, and the effect on actual processing is increased.

SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to transmit a communication message (a transmission message other than a business message used only for communication) at regular time intervals to transmit a communication response even when a business message does not occur. An object of the present invention is to provide a communication state monitoring method between host computers which can detect a failure immediately by receiving a telegram (a response telegram to a loosely energized text).

[0005]

A communication status monitoring method between host computers according to the present invention is a communication status monitoring method for monitoring communication status between host computers connected via a line. A business message reception processing unit that sets a first timer for monitoring the time until the next business message is received, and transmits a loose communication message when the business message is not received within a predetermined time period measured by the first timer. said first timer together with canceling the second sets a timer communication message transmission processing unit for time monitoring to communication response message received from the destination host computer receives the communication response message to the second timer
A communication response message reception processing unit for setting a communication response message, and a line failure message output processing unit for displaying, on a console, when a communication response message has not been received within a certain period of time measured by the second timer. A business message transmission including a host computer on the message receiving side, a business message transmission processing unit for transmitting a business message, a communication message reception processing unit for receiving a communication message, and a communication response message transmission processing unit for transmitting a communication response message. And a host computer on the side.

[0006]

In the communication status monitoring method between host computers according to the present invention, the business message transmission processing section of the business message transmission side host computer transmits the business message, and the business message reception processing section of the business message reception side host computer performs the business message transmission. A first timer for monitoring the time from receipt of a message to reception of the next business message is set. If the business message transmission processing unit does not receive a business message within a certain period of time measured by the first timer, the communication message is transmitted. And a second timer for monitoring the time until the communication response message is received from the partner host computer is set. The communication message reception processing unit of the host computer on the business message transmission side receives the communication message and receives the communication response. The message transmission processing unit transmits the communication response message, and the communication response message reception processing unit of the host computer on the business message receiving side receives the communication response message and sets the second timer. And Yanseru, line fault message output processing unit and the second timer so indicate to the operator console if it does not receive a communication response message within a predetermined time for counting.

[0007]

Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing a configuration of a communication state monitoring method between host computers according to an embodiment of the present invention. In the communication state monitoring method between host computers according to the present embodiment, the host computer A on the business message receiving side and the host computer B on the business message transmitting side have the lines # 1 to #.
They are connected via n (n is a positive integer).

The host computer A includes a business message reception processor 11, a communication message transmission processor 12, a communication response message reception processor 13, and a line failure message output processor 14.
A line status monitoring information section 15, a timer (hereinafter, referred to as a first timer) 16 for monitoring the time from the reception of the business message to the reception of the next business message, and the time monitoring from the transmission of the communication message to the reception of the communication response message. (Hereinafter, referred to as a second timer) 17. It should be noted that the business message reception processing unit 11, the communication message transmission processing unit 12, the communication response message reception processing unit 13, the line failure message output processing unit 14, the first timer 16 and the second timer 17
There are n pieces corresponding to 1 to #n.

The business message reception processing unit 11 includes a business message reception unit 111 for receiving a business message, and a first timer setting unit 112 for setting the first timer 16.

The sparse energization statement transmission processing unit 12 includes a sparse energization statement transmission means 121 for transmitting the sparse energization statement and a second timer setting means 122 for setting the second timer 17.

The communication response message reception processing unit 13 includes a communication response message receiving unit 131 that receives a communication response message, and a second timer canceling unit 1 that cancels the second timer 17.
32.

The line fault message output processing unit 14 includes a message output unit 141 for outputting a line fault message to the console 143, and a line state restoration setting unit 142 for setting line state recovery in the line state monitoring information unit 15. And is connected to the console 143.

The host computer B includes a business message transmission processing unit 21 for transmitting a business message, a communication message reception processing unit 22 for receiving a communication message, and a communication response message transmission processing unit 23 for transmitting a communication response message. It is composed of It should be noted that the business message transmission processing unit 21 and the loose power transmission message reception processing unit 22
And the communication response message transmission processing unit 23
There are n correspondences.

Referring to FIG. 2, the line status monitoring information section 1
5 includes n entries corresponding to lines # 1 to #n each including a line identifier 151, a line state 152, a business message reception time 153, and a loosely transmitted message transmission flag 154.

FIG. 3 is a diagram showing an example of a message flow in the communication state monitoring method between host computers according to the present embodiment.

Next, the operation of the thus-configured communication state monitoring method between host computers according to the present embodiment will be described. Here, for simplicity of description, description will be made focusing on a case where transmission and reception are performed via one line #i (1 ≦ i ≦ n).

When a business message is transmitted from the host computer B by the business message transmission processing unit 21 via the line #i, the business message reception processing unit 1 of the host computer A receives the business message.
Reference numeral 1 denotes a state in which a business message is received by the business message receiving unit 111, the line status 152 of the line status monitoring information unit 15 corresponding to the line identifier 151 corresponding to the received line #i is set to 0 (normal), and The reception time of the message is set to the business message reception time 153 corresponding to the line #i of the line status monitoring information unit 15. Next, the business message reception processing unit 11
Sets the first timer 16 corresponding to the line #i by the first timer setting means 112.

Thereafter, the first timer 1 corresponding to the line #i
6, when a predetermined time has been counted, the sparse power transmission statement transmission processing unit 12
Refers to the line state 152 corresponding to the line #i in the line state monitoring information section 15, and if 0 (normal), refers to the corresponding business message reception time 153. Line status monitoring information section 15
When the business message reception time 153 corresponding to the line #i is a predetermined time, for example, 30 seconds or more, the sparse energized sentence transmission processing unit 121 causes the sparse energized sentence transmission unit 121 to change the line #i of the line status monitoring information unit 15 to the line #i. Corresponding loose electricity sentence transmission flag 15
4 is set to 1 (on), and the destination host computer B
, And transmits a sparse power statement via the line #i. Further, the sparse energization statement transmission processing unit 12 sets the second timer 17 corresponding to the line #i by the second timer setting unit 122. Note that even if the line status 152 corresponding to the line #i in the line status monitoring information unit 15 is 1 (failure) or 0 (normal), a certain period of time from the business message reception time 153,
For example, if 30 seconds have not elapsed, the sparse energization statement transmission processing unit 12 does nothing.

The host computer B receives the communication message via the line #i by the communication message reception processing section 22 and transmits the communication response message to the host computer A via the circuit #i by the communication response message transmission processing section 23. I do.

Line # from the destination host computer B
When the communication response message is received via i, the communication response message reception processing unit 13 of the host computer A drops the communication message transmission flag 154 corresponding to the line #i of the line state monitoring information unit 15 to 0 (off). Then, the reception time of the communication response message is set to the business message reception time 153 corresponding to the line #i of the line status monitoring information unit 15. Next, the communication response message reception processing unit 13 cancels the second timer 17 corresponding to the line #i by the second timer canceling unit 132 and sets the first timer 16 corresponding to the line #i.

On the other hand, the second timer 17 corresponding to the line #i
Has counted a certain time, the line fault message output processing unit 14 refers to the loose electricity transmission flag 154 corresponding to the line #i in the line status monitoring information unit 15, and the loose electricity transmission flag 154 is 0 (off). If you do nothing. If the loose communication statement transmission flag 154 is 1 (ON), the line failure message output processing unit 14
The line status 152 corresponding to the line #i is set to 1 (failure), a message indicating that a failure has occurred in the line #i is output to the console 143 by the message output means 141, and the line # is output to the operator. It urges recovery from the failure of i.

When the operator reports from the console 143 that the failure of the line #i has been restored by the operator, the line failure message output processing unit 14 uses the line state restoration setting unit 142 to send the line #i of the line state monitoring information unit 15 to the line #i. Corresponding line status 152
To 0 (normal).

The above processing is performed on all the lines # 1 used between the host computer A and the host computer B.
To #n.

In the above embodiment, the host computer A has the business message reception processing unit 11 and the loose communication message transmission processing unit 1
2, a communication response message reception processing unit 13, a line failure message output processing unit 14, a line state monitoring information unit 15, a first timer 16 and a second timer 17, and a business message transmission processing unit 21, a communication message Reception processing unit 22
Although the case where the communication response message transmission processing unit 23 is provided has been described, it can be said that the present invention can be similarly applied to a case where both host computers are provided with all parts and business messages are mutually transmitted and received. Not even.

[0026]

As described above, according to the present invention, even when a business message does not occur, a fault message can be promptly transmitted by transmitting a communication message between host computers at regular time intervals and receiving a communication response message. Can be detected in
The effect is that quick recovery is possible and the effect on actual processing can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a communication state monitoring method between host computers according to an embodiment of the present invention.

FIG. 2 is a diagram showing contents of a line status monitoring information section in FIG. 1;

FIG. 3 is a diagram illustrating an example of a message flow in the communication state monitoring method between host computers according to the embodiment;

[Description of Signs] 11 Business message reception processing unit 12 Communication message transmission processing unit 13 Communication response message reception processing unit 14 Line failure message output processing unit 15 Line status monitoring information unit 16 First timer 17 Second timer 21 Business message transmission processing Unit 22 Communication message reception processing unit 23 Communication response message transmission processing unit 111 Business message reception unit 112 First timer set unit 121 Communication message transmission unit 122 Second timer setting unit 131 Communication response message reception unit 132 Second timer cancellation unit 141 Message Output unit 142 Line status recovery setting unit 143 Operator console 151 Line identifier 152 Line status 153 Business message reception time 154 Slow power transmission flag A, B Host computer # 1 to #n Line

Claims (1)

(57) [Claims] In a communication status monitoring method between host computers for monitoring a communication status between host computers connected via a line, a first timer for monitoring a time from receiving a business message to receiving the next business message. A business message reception processing unit that sets a communication message when the first timer does not receive a business message within a certain period of time, and monitors a time until a communication response message is received from a partner host computer. together with communication message transmission processing unit for setting a second timer for, when receiving a communication response message to cancel the second timer
A communication response message reception processing unit for setting the first timer, and a line failure message output process for displaying, on a console, when a communication response message has not been received within a certain period of time measured by the second timer. And a business message transmission processing unit for transmitting the business message, a communication message reception processing unit for receiving the communication message, and a communication response message transmission processing unit for transmitting the communication response message. A communication status monitoring method between host computers, comprising: a business message transmission side host computer comprising: