JPS62247441A - Batch transfer system for transmission message - Google Patents

Abstract

PURPOSE:To reduce the load of a frame transmission means due to reduction of the number of transmission frames and to improve the transmission efficiency as well as the on-line response time, by performing the batch transmission of plural transmission messages just in a single transmission procedure. CONSTITUTION:A batch frame production means 13 first secures a transmission buffer 23 of the largest message length that can be received by a terminal 17 via a main memory control means 15. Then a message 21 is obtained within a message queue 20 by a message queue control means 12. The message 21 is used as an input to produce a transmission frame of a transmission procedure style on the buffer 23. Then it is decided whether or not an unused area exists on the buffer 23. If an unused area exists on the buffer 23, a message 22 is obtained within the queue 20 by the means 12.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a method for batch transfer of transmitted messages, and particularly relates to a method for generating a plurality of transmitted messages as transmission frames in a transmission procedure format on a transmission buffer and transferring them all at once. .

[Conventional technology]

Conventionally, in a transmission message transfer method, a message queue management means extracts one message from a message queue, and a transmission frame in a transmission procedure format for only that one message is generated on a transmission buffer managed by a main memory management means. Then, this transmission frame was transmitted to the terminal by a frame transmission means.

[Problem that the invention seeks to solve]

In the conventional transmission message transfer method described above, even if the terminal has the ability to receive long messages, it transmits each message while keeping the length of the message on the message queue, so the transmission efficiency decreases and the terminal's message is The disadvantage is that the reception time is long.

SUMMARY OF THE INVENTION In view of the above-mentioned points, an object of the present invention is to provide a method for collectively transferring a plurality of transmitted messages in a single transmission procedure.

[Means for solving problems]

The transmitted message batch transfer method of the present invention has the ability to receive consecutive transmitted messages in a data communication system that extracts transmitted messages from a message queue, generates a transmission frame in a transmission procedure format on a transmission buffer, and transmits it to a terminal. Message queue management means for storing and managing transmission messages sent from a program in the message queue; main memory management means for managing the transmission buffer; a batch frame generation means for extracting a plurality of transmission messages up to a maximum message length that can be received by a terminal and generating the transmission frame in a transmission procedure format on the transmission buffer using the plurality of transmission messages, and the batch frame generation means and frame transmitting means for transmitting the transmission frame generated by the above to the terminal.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram illustrating a data communication system that uses a sent message batch transfer method according to an embodiment of the present invention. This data communication system includes a host computer 10 connected to a terminal 17 via a communication line &1116.

The host computer 10 includes a program 11, a message queue management means 12 that stores messages sent from the program 11 in a message queue 20 (see FIG. 2), and a message queue management means 12 that retrieves a plurality of messages from the message queue 20. a batch frame generation means 13 that generates a transmission frame in a transmission procedure format on a transmission buffer 23 (see FIG. 2); and a frame transmission means 14 that transmits the generated transmission frame to a terminal 17 via a communication line 16. and a main memory management means 15 that manages the transmission buffer 23.

Terminal 17 is a data terminal device capable of receiving successive transmitted messages.

Referring to FIG. 2, a plurality of messages 21 and 22 in the message queue 20 are stored on one sending buffer 23 with a transmission control character STX (Start
of Text) and transmission control character ETX (E
nd of Text) as one transmission frame.

Referring to FIG. 3, the processing in the batch frame generation means 13 shown in FIG.
And unused area existence determination step 35 in the transmission buffer
and a frame transmitting means activation step 36.

Next, the operation of the transmitted message batch transfer system of this embodiment configured as described above will be explained.

Assume now that messages 21 and 22 sent from the program 11 are sequentially queued in a message queue 20 by the message queue management means 12, as shown in FIG.

The batch frame generation means 13 first starts with the main memory management means 15.
The transmission buffer 23 with the maximum message length that can be received by the terminal 17 is secured (step 31). Next, the message 21 in the message queue 20 is obtained by the message queue management means 12 (step 32).
Then, it is determined whether or not a message has been obtained (step 33). In this case, message 21 has been obtained, so next, using this message 21 as input, a transmission procedure format is stored on the transmission buffer 23. A transmission frame is generated (step 34).

Next, it is determined whether or not there is an unused area on the sending buffer 23 (step 35).
Control is passed to 2.

In step 32, the message queue management means 12 determines whether or not the message 22 in the message queue 20 is obtained (step 33).
As a result, a transmission frame in the transmission procedure format is generated on the transmission buffer 23 in such a format that the beginning of the message 22 starts immediately after the message 21 in the transmission frame in the transmission procedure format previously generated (step 34).

Next, it is determined whether there is an unused area on the transmission buffer 23 (step 35), and in this case, only the two transmission messages 21 and 22 are generated as transmission frames on the transmission buffer 23. Assuming that there is still unused space on the transmission buffer 23,
Control is again passed to step 32.

In step 32, the message queue management means 12 attempts to read out the message in the message queue 20, but since there are no more messages to read out, no message can be obtained, and in the next step 33, a frame transmission means activation step is performed. Control is passed to 36. Therefore, the activated frame transmitting means 14 transmits the transmission frame on the transmission buffer 23 to the terminal 1 via the communication circuit m16.
Sent on 7.

In addition, in the explanation of the operation of the above embodiment, two messages 21 and 22 are queued in the message queue 20, and the total message length is
Although the message length of the messages queued in the message queue 20 is larger than the maximum message length of the transmission buffer 23, in step 35, the transmission buffer is By repeating the batch frame generation operation until there is no unused area on the message queue 23, the messages in the message queue 20 (sometimes a single message) reach the maximum message length that the terminal 17 can receive. A transmission frame in a transmission procedure format is generated on the transmission buffer 23 and transmitted to the terminal 17. In this case, messages queued in the message queue 20 but not yet transmitted are transmitted to the terminal 17 by newly repeating the process shown in FIG. 3.

Further, if the total message length of the messages queued in the message queue 20 is smaller than the maximum message length of the sending buffer 23 (this includes the case of this embodiment), the message is received in step 33. By repeating the batch frame generation operation until the message queue 20 becomes
A message (which may be singular) is generated as a transmission frame in a transmission procedure format on the transmission buffer 23 and transmitted to the terminal 17 so as to make efficient use of the reception capability of the terminal 17.

〔Effect of the invention〕

As explained above, the present invention reduces the load on frame transmitting means by reducing the number of transmission frames, improves transmission efficiency, and improves online response time by collectively transmitting a plurality of transmitted messages in one transmission procedure. This has the effect of making it possible to achieve the following.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a message correspondence diagram between a message queue and a sending buffer, and FIG. 3 shows processing in the batch frame generation means shown in FIG. FIG. In the figure, 10... host computer, 11... program, 12... message queue management means, 13... batch frame generation means, 14... frame transmission means, 15... main memory management Means: 16... Communication line; 17... Terminal; 20... Message queue; 21. 22... Message; 23... Transmission buffer.

Claims (1)

[Scope of Claims] In a data communication system in which a transmission message is extracted from a message queue, a transmission frame in a transmission procedure format is generated on a transmission buffer, and the frame is transmitted to a terminal, the terminal has the ability to receive successive transmission messages. Message queue management means for storing and managing transmission messages sent from a program in the message queue; main memory management means for managing the transmission buffer; and messages received by the terminal from the message queue. a batch frame generation means for extracting a plurality of transmission messages up to a maximum message length and generating the transmission frame in a transmission procedure format on the transmission buffer using the plurality of transmission messages; A transmission message batch transfer system comprising: frame transmission means for transmitting the transmission frame to the terminal.