JPH0537587A - Reply sequence transmission system - Google Patents

Abstract

PURPOSE:To relieve the load of a line common control section by allowing the line common control section to publicate a transmission control command and a reply sequence character group altogether to a line connection section allowing a connection section to identify a reply sequence transmission enable block and sending the reply sequence. CONSTITUTION:A line common control section and a line connection section are connected by 'through' at non-transmission of a reply sequence. The through-connection of setting paths a, b and interrupt paths d, e is stopped at the transmission of the reply sequence and a transmission control command and a reply sequence character group given from the setting path (f) are set to a transmission circuit 12 and a transmission character setting circuit 13 in response to the transmission character interruption. Then the line connection section identifies the reply sequence transmission enable block based on the communication protocol and the reply sequence character group is sent according to the transmission control command and the end of reply sequence transmission is informed to the line common control section attended with the end of transmission. Thus, the load relating to the reply sequence is relieved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a response sequence transmission system in a communication control processing device.

[0002]

2. Description of the Related Art FIG. 4 is a block diagram showing a relationship between a line connection unit and a line common control unit in a communication control processing device.

In the figure, the communication control processing device has a line connection section 32 provided for each line 31, and a line common control section 33 for commonly controlling a plurality of line connection sections 32. The line connection unit 32 decomposes byte data into bit units and transmits the data, and also assembles a received bit string into byte data.

Here, a conventional response sequence transmission procedure will be described with reference to FIG. Line common control unit 33
Identifies a response sequence transmittable section formed between characters of STX and ETX (ETB) used for framing an information message within a transmission block or within a transmission block based on a communication protocol, and On the other hand, a transmission control command related to the response sequence transmission method (either the response sequence single transmission or the response sequence superimposed transmission) is directly issued. The line connection unit 32 instructs that the block check sequence (BCS / LRC) is not calculated by setting the transmission control command.

The line common control unit 33 subsequently sets the response sequence to the line connection unit 32 character by character. The line connection unit 32 makes an interrupt requesting the next transmission character to the line common control unit 33 every time the set response sequence character is transmitted, and the line common control unit 33 responds to the interrupt with the next response. Repeat the process of setting sequence characters. The line common control unit 33 sets the last response sequence character, and notifies the upper device of the completion of the response sequence transmission when the interrupt requesting the next transmission character arrives from the line connection unit 32. Similarly, each response sequence is transmitted thereafter.

[0006]

In the conventional response sequence transmission method, the line common control unit 33 is involved in the transmission of the response sequence as described above, so that the line common control unit 33 can control. Na line connection 32
There was a limit to the number of lines (number of lines). That is, this is a factor that limits the number of lines that can be accommodated in one line common control unit 33.

It is an object of the present invention to provide a response sequence transmission system capable of reducing the load on the line common control unit.

[0008]

SUMMARY OF THE INVENTION The present invention provides a plurality of line connection units which are provided for each line and which decompose byte-unit data into bit units and transmit the data, and control the plurality of line connection units to transmit data. In the communication control processing device including a line common control unit for instructing, the line common control unit sends a transmission control command and a response sequence character group related to a response sequence transmission method to the line connection unit in accordance with a transmission request from a higher-level device. The line connection unit is provided with means for notifying the host device of the completion of the response sequence transmission when there is a response sequence transmission completion interrupt from the line connection unit, and the line connection unit includes the transmission control command and the response sequence character. In response to the reception of the group, the response sequence transmittable section based on the communication protocol is identified, and one character from the response sequence character group And Shin, characterized in that the response sequence transmit complete interrupt with the transmission end includes means for issuing to said circuit common control unit.

[0009]

According to the present invention, the line connecting unit has a function of identifying the response sequence transmittable section based on the communication protocol,
The line common control unit issues a transmission control command and a response sequence character group to the line connection unit at once, and the line connection unit issues a response sequence transmission completion interrupt to the line common control unit when the transmission of the response sequence is completed. Can be issued. Therefore, after the line common control unit has issued the transmission control command and the response sequence character group all at once, the line common control unit only has to notify the upper device of the response sequence transmission completion in response to the response sequence transmission completion interrupt from the line connection unit. , It is possible to significantly reduce the load related to the response sequence transmission.

[0010]

FIG. 1 is a block diagram showing the configuration of an embodiment of a line connection unit which realizes the response sequence transmission system of the present invention.

In the figure, a transmission circuit 12 is connected via a response sequence transmission control circuit 11 to a set path a to which the transmission control command sent from the line common control unit is input. Further, the setting path b to which the transmission character sent from the line common control unit is input is connected to the transmission character setting circuit 13 via the response sequence transmission control circuit 11,
Further, the transmission circuit 12 and the specific character detection circuit 14 are connected via the transfer path c. Transmission character request interrupt and specific character detection circuit 1 output by the transmission character setting circuit 13
The specific character detection interrupt output by 4 is sent from the interrupt paths d and e to the line common control unit via the response sequence transmission control circuit 11. The transmission circuit 12 transmits the character set on the line.

Here, the feature of the present invention is that the response sequence transmission control circuit 11 is inserted in each setting path or the interrupt path to the line common control unit, and the line is shared by the response sequence transmission control circuit 11. A configuration in which a setting path f for capturing a transmission control command and a response sequence character group sent by the control unit is connected, and a response sequence transmission completion interrupt output by the response sequence transmission control circuit 11 is sent from the interrupt path g to the line common control unit. It is in.

Here, the response sequence transmission control circuit 11
The operation will be described. When the response sequence is not transmitted, the set paths a and b and the interrupt paths d and e that connect the line common control unit and the circuits of the line connection unit are connected through.

At the time of transmitting the response sequence, the through connection of each set route a, b and the interrupt route d, e is stopped,
In response to the transmission character request interrupt, the transmission control command and response sequence character group given from the setting path f are set in the transmission circuit 12 and the transmission character setting circuit 13.

The method for identifying the transmittable section of the response sequence is such that when the specific character detection interrupt is received, it is identified that the response sequence cannot be transmitted, and when the specific character detection interrupt is not received, the response sequence can be transmitted. Identify as present.

2 and 3 show an operation example of this embodiment.
Response sequence "D to text message" STX to ETX "
It is a figure explaining the case where "LE-ACK" is superimposed and transmitted. 2 and 3 are continuous in time series.

The line common control unit 33 sets "STX" for starting the transmission of the text message in response to the transmission character request interrupt from the transmission character setting circuit 13. This "STX" is transferred to the transmission circuit 12 via the transmission character setting circuit 13 and transmitted. The transmission character setting circuit 13 sends a transmission character request interrupt by the transfer of "STX", and the line common control unit 33 accordingly sends the transmission characters "A" and the following characters one by one. Similarly, the transmission character is transferred and transmitted to the transmission circuit 12 via the transmission character setting circuit 13. The response sequence transmission control circuit 11 is in the through state.

Here, the response sequence "D
If there is a request for transmission of "LE / ACK", the line common control unit 33 sets the transmission control command and the response sequence "DLE / ACK" in the response sequence transmission control circuit 11 via the setting route f. The transmission character request interrupt issued by the transmission character setting circuit 13 is received by the response sequence transmission control circuit 11 and immediately transmitted by the transmission control command (BCS / LR).
C instruction for non-computation) is set in the transmission circuit 12. In the transmission circuit 12, the BCS / LRC calculation is stopped.

Subsequently, the response sequence transmission control circuit 11
Sets the response sequence "DLE" in the transmission character setting circuit 13, the transmission character setting circuit 13 transfers it to the transmission circuit 12, and sends the next transmission character request interrupt to the response sequence transmission control circuit 11. Similarly, the response sequence transmission control circuit 11 causes the response sequence “ACK”.
Is set in the transmission character setting circuit 13, and the transmission character setting circuit 1
3 transfers it to the transmission circuit 12, and sends the next transmission character request interrupt to the response sequence transmission control circuit 11. The transmission circuit 12 transmits each response sequence.

Upon completion of transmission of the set response sequence, the response sequence transmission control circuit 11 sets a transmission control command (BCS / LRC calculation target instruction) in the transmission circuit 12 and interrupts the line common control unit 33. A response sequence transmission completion interrupt is sent out via the path g. In the transmission circuit 12, the BCS / LRC calculation is restarted,
The line common control unit 33 notifies the upper device of the completion of the response sequence transmission.

Subsequently, the response sequence transmission control circuit 11
Sends a transmission character request interrupt to the line common control unit 33, and the line common control unit 33 accordingly sends out the transmission characters "Q" and the following characters which have been interrupted one by one. Similarly, the transmission character is transmitted via the transmission character setting circuit 13 to the transmission circuit 12
Forwarded to and sent. The response sequence transmission control circuit 11 is in the through state.

The line common control section 33 responds to a transmission character request interrupt received after the last transmission character is transmitted.
Set "ETX" for ending text message transmission. This “ETX” is sent to the transmission circuit 1 via the transmission character setting circuit 13.
2 is transmitted and transmitted. On the other hand, the specific character detection circuit 14
Detects this ETX pattern and sends a specific character detection interrupt to the response sequence transmission control circuit 11. The response sequence transmission control circuit 11 determines that the response sequence cannot be transmitted by this specific character detection interrupt, and sends the specific character detection interrupt to the line common control unit 33. The line common control unit 33 accordingly sets a transmission control command in the transmission circuit 12, and the transmission circuit 12 sends a transmission completion interrupt to the line common control unit 33 upon completion of transmission. In response to this transmission completion interrupt, the line common control unit 33 notifies the upper device of the completion of the text message transmission.

To summarize the above, according to the present invention, each line connection unit receives the processing of the line common control unit by the following procedure, and the load can be reduced. The line common control unit collectively issues a transmission control command designating a response sequence transmission method and a response sequence character group to the line connection unit. The line connection unit identifies the response sequence transmittable section based on the communication protocol, and sets the response sequence to 1 according to the transmission control command set by the line common control unit.
Send character by character. The line connection unit notifies the line common control unit of the completion of the response sequence transmission by an interrupt. Upon receiving the response sequence transmission completion interrupt from the line connection unit, the line common control unit notifies the host device of the completion of the response sequence transmission.

[0024]

As described above, according to the present invention, the load related to the response sequence transmission in the line common control unit can be significantly reduced, so that the line common control unit can control the line connection unit (line). You can increase the number.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a line connection unit that realizes a response sequence transmission method of the present invention.

FIG. 2 illustrates a text message “ST” as an operation example of the present embodiment.
It is a figure (the 1) explaining the case where the response sequence "DLE ACK" is superimposed and transmitted to "X to ETX".

FIG. 3 illustrates a text message “ST” as an operation example of the present embodiment.
It is a figure (the 2) explaining the case where response sequence "DLE ACK" is superimposed and transmitted to "X-ETX".

FIG. 4 is a block diagram showing a relationship between a line connection unit and a line common control unit in the communication control processing device.

FIG. 5 is a diagram illustrating a conventional response sequence transmission procedure.

[Explanation of symbols]

 11 response sequence transmission control circuit 12 transmission circuit 13 transmission character setting circuit 14 specific character detection circuit 31 line 32 line connection unit 33 line common control unit

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Reference number within the agency FI Technical indication location H04L 29/10 8020-5K H04L 13/00 309 B (72) Inventor Toshiaki Fujita Uchiyuki-cho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation

Claims (1)

Claim: What is claimed is: 1. A plurality of line connection units, which are provided for each line and divide the byte data into bit units and transmit the data, and control the plurality of line connection units to instruct data transmission. In the communication control processing device including a line common control unit, the line common control unit collectively transmits a transmission control command and a response sequence character group related to a response sequence transmission method to the line connection unit according to a transmission request from a higher-level device. And transmitting a response sequence transmission completion interrupt from the line connection unit, the line connection unit including means for notifying the upper device of the completion of the response sequence transmission, and the line connection unit In response to the receipt, the response sequence transmission possible section based on the communication protocol is identified, and one character is transmitted from the response sequence character group. Response sequence transmission method, characterized in that the response sequence transmit complete interrupt with the transmission end includes means for issuing to said circuit common control unit.