JPH03102553A - Response confirming system for computer communication - Google Patents

Abstract

PURPOSE:To guarantee the arrival of a telegraphic message and to send out the telegraphic message again when it does not arrive between work programs by providing telegraphic message serial number applying means, monitoring means for a response from a reception side, telegraphic message storing means and telegraphic message retransmitting means in two telegraphic message transmission side computers, and providing a returning means for a response telegraphic message in a reception side computer. CONSTITUTION:The work program on a transmission side stores the transmitting telegraphic message in a telegraphic message storing file, transmits the message to the work program of the called party side computer and activates a timer for response monitor. The work program on the reception side returns the response telegraphic message showing normal reception. The work program on the transmission side checks the return within fixed time and when the response is given, the monitor timer is stopped. Then, the telegraphic message is erased from the telegraphic message storing file. When the response is not given, the message is transmitted again to the work program of the called party side computer.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a response confirmation method for confirming the arrival of data in mutual communication between computers, and in particular, to a method for confirming a response at a business program level using the concept of a message serial number. This invention relates to a response confirmation method for confirming data arrival and guaranteeing accuracy of data communication and retransmission in case of data loss.

[Conventional technology]

Conventionally, response confirmation means for confirming the arrival of data in computer communication is HDLCK'BS.
C? X. These are included in the functions of communication control procedures such as 25, etc., and are outside the scope of business programs.

[Problem to be solved by the invention]

As mentioned above, in conventional computer communications, the response confirmation means for the communication control procedure level is performed independently of the operation of the business program. It is unclear whether this has been reached.

In addition, when a normal response is confirmed in the communication control procedure I/bell, the transmitted message held at that point is discarded, so even if the message has not arrived at the business program, the message will be replayed. The disadvantage is that it cannot be sent.

[Means to solve the problem]

The computer communication response confirmation method of the present invention verifies whether the data sent and received between computers is correct or not, and whether or not the message has been received. The serial number can be used to check the business program information.

That is, the computer communication response confirmation method of the present invention includes a means for assigning a message serial number to the message sending side computer of two computers having mutual communication means, a means for monitoring the presence or absence of a response from the other side computer, and a means for monitoring unresponsive messages. The receiving side computer is provided with a means for returning a response message to the received message.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

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

In FIG. 1, 1 and 5 are two combination computers that send and receive messages to each other, 2 and 7 are communication control units W (or communication control programs) of computers 1 and 5, and 3 and 7 are communication control units W (or communication control programs) of computers 1 and 5. Hi6 is those business programs, 4 and 8
is a message N product file. When transmitting and receiving messages between the computers 1 and 5, the messages are first stored in the message storage file 4 or 8 of the sending computer, and then the messages are sent to the other computer. If the message is received normally, the business program 3 or 6 sends back a response message to the other party's computer indicating that the message has been received normally. The sending business program 3 or 6 that receives the response message deletes the message corresponding to the response from the message storage file 4 or 8.

Next, the operation of the above embodiment will be explained with reference to FIG.

First, the business program on the sending side stores a message to be sent in a message storage file (reference numeral 11). Next, the message is sent to the other party's business program (reference numeral 12).

At the same time, a response monitoring timer is activated to start monitoring whether a response to the transmitted message is returned within a certain period of time. The receiving side business program receives the message (reference numeral 13) and slyly sends back a response message to notify the other party that it has been successfully received (reference numeral 4). The sending-side business program checks whether a response to the message just sent has been returned within a certain period of time (reference numeral 15). If there is a response, the response monitoring timer is stopped and the message corresponding to the response is deleted from the message storage file (reference numeral 16). With the above operations, one message transmission operation is completed. In addition, if there is no response within a certain period of time, a response monitoring timer detects that there is no response for a certain period of time, extracts the unresponsive message from the message N product file, and sends it to the business program on the other party's computer again. Transmit again (reference number] 2). In response confirmation in this method, a message serial number is added to the transmitted message, and the message serial number of the received message is stored in the response message, thereby associating the messages between the sending side and the receiving side.

〔Effect of the invention〕

As explained below, the computer communication response confirmation method of the present invention responds to the transmitted message 5 6 using the message serial number and stores the message until a response is received. It is possible to guarantee the arrival of a message between business programs in communication between them, and to resend the message when the message does not arrive, thereby improving the reliability of communication between computers.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 is a flow chart showing the operation of FIG. 1. 1.5... Computer, 2.3... Communication control device, 3 6... Business program, 4.8... Message N product file.

Claims (2)

[Claims] (1) The message transmitting side computer of two computers having mutual communication means is provided with a message serial number assigning means, a means for monitoring the presence or absence of a response from the receiving side computer, a message storing means, and a message retransmitting means, and the receiving side computer A response confirmation method for computer communication, characterized in that a means for returning a response message to a received message is provided in the computer communication. (2) The message transmitting side computer of two computers having mutual communication means is provided with a message serial number assigning means, a means for monitoring the presence or absence of a response from the receiving side computer, a message storing means, and a message retransmitting means, and the receiving side computer is provided with means for returning a response message to the received message, and after accumulating the message in the message storage means of the sending computer, transmits the message to the receiving computer, and if the receiving computer normally receives the message; A response message indicating that the message has been normally received is sent back to the sending computer, and the sending computer that has received the response message deletes the message from the message storage means, and if there is no response within a certain period of time. is characterized in that the monitoring means detects that there is no response for a certain period of time, extracts the unresponsive message from the message storage means, and transmits it again to the sending computer by the retransmission means. A response confirmation method for computer communication.