JPS63120544A - Reception order number transmission confirming system - Google Patents

Abstract

PURPOSE:To confirm the transmission end period of a received sequence number by providing a means storing the newest reception data confirming reception order number and a means representing that the reception order number stored in the storage means is sent while being added to a data group. CONSTITUTION:A data group 100, a data transmission equipment 200 sending plural data groups 100 consecutively, a reception sequence number storage means 300 storing the newest reception data confirming reception sequence number NR are provided. Moreover, a reception sequence number transmission identification means 400 is provided, which represents that the reception sequence number NR stored in the means 300 is sent while being added to the data group 100. Thus, the data transmitter 200 uses the means 400 to confirm the transmission end period of the received sequence number NR stored in the reception sequence number storage means 300.

Description

[Detailed Description of the Invention] [Summary] In a data transmitting device that continuously transmits a plurality of data groups, a means is provided for adding a reception order number for confirming the latest received data to the data group and confirming that the data group has been transmitted. .

[Industrial application field]

The present invention utilizes high-level data link control procedures (HDLC).
), etc., in a data transmitting device that adds a reception sequence number to transmission data to confirm reception of the reception data, a reception method that makes it possible to confirm that the latest reception sequence number has been added to the transmission data and has been transmitted. Concerning sequence number transmission confirmation method.

[Conventional technology]

FIG. 3 is a diagram showing an example of a data communication device to which the present invention is applied, and FIG. 4 is a diagram showing an example of a conventional high-level data link control device.

3 and 4, the data communication device includes a processor 1, a storage device 2, a direct memory access control device 3, and a high-level data link control device 4. A plurality of information frames I to be transmitted to the opposite data communication device stored in the storage device 2 based on instructions.
are sequentially extracted and transferred to the high-level data link control device 4.

On the other hand, among the information frames received from the opposite data communication device, the processor I sets the number next to the transmission order number assigned to the latest information frame that has been normally received as the reception order number NR to the high-level health data link control device. Convey to W4.

The high-level data link control device 4 stores the reception order number NR transmitted from the processor 1 in the register 42, and when the information frame I is transferred from the storage device 2 by the direct memory access control device 3, the setting section 43 stores the reception order number NR transmitted from the processor 1. The reception order number N stored in the register 42 is added to the information frame I and sent to the opposite data communication device.

[Problem that the invention seeks to solve]

As is clear from the above explanation, in a conventional high-level data link control device, when the reception order number NR transmitted from the processor 1 is added to the information frame I and sent to the opposite data communication device, the reception order number NR The processor 1 was not provided with a means to notify the processor 1 of the completion of the transmission.

Therefore, the processor 1 could not confirm the transmission completion time of the reception order number NR set in the high-level data link control device 4.

[Means for solving problems]

FIG. 1 is a diagram showing the principle of the present invention.

In FIG. 1, 100 is a data group, 200 is a data transmitting device that continuously transmits a plurality of data groups 100, and 30
0 is a reception sequence number storage means for storing the reception sequence number NR for confirming the latest received data.

Reference numeral 400 denotes reception sequence number transmission identification means 400 provided according to the present invention.

[Effect]

The reception sequence number transmission identification means 400 determines that the reception sequence number N7 stored in the reception sequence number storage means 300 is data group 1.
00 is added to indicate that it was sent.

Therefore, the data transmitting device can confirm the transmission completion time of the reception sequence number stored in the reception sequence number storage means using the reception sequence number transmission identification means.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a diagram showing a high-level data link control device according to an embodiment of the present invention. Note that the same reference numerals indicate the same objects throughout the figures. Furthermore, the target data communication device is as shown in FIG.

In FIG. 2, a high-level data link control device 4 is shown as a data transmitting device 200, a register 42 and a setting section 43 are shown as a receiving order number storage means 300, and a flip-flop is shown as a receiving order number transmission identifying means 400. (FF) 44 and a gate 45 are provided.

In FIGS. 2 and 3, the processor 1 assigns a number next to the transmission order number given to the latest information frame that has been normally received among the information frames transmitted from the opposite data communication device. The receiving order number N is transmitted to the high-level data link control device 4, and a reset signal R is transmitted to the high-level data link control device 4.

The high-level data link control device 4 stores the reception order number N□ transmitted from the processor 1 in the register 42, and also stores the reception order number N□ transmitted from the processor 1
This sets the flip-flop 44 to the reset state. As a result, the transmission confirmation signal X output from the flip-flop 44 is set to logic "O".

In this state, when the next information frame I to be transmitted to the opposite data communication device is transferred from the storage device 2 under the control of the direct memory access control device 3, the high-level health data link control section 41 sets the register 42 by the setting section 43.
The receiving order number NR stored in the information frame (2) is added to the information frame (2) and sent to the opposite data communication device.

Note that the high-rail data link control unit 41 sets the signal input to the gate 45 to logic "1" when the field of F is not sent out.

Therefore, in a state where both signals a and b are set to logic "1", it is determined that the reception order number NR stored in the register 42 is sent out by the frame currently being transmitted. In this state, the cent signal S is input from the gate 45 to the flip-flop 44. As a result, the transmission confirmation signal X output from the flip-flop 44 is set to logic "1".

On the other hand, the processor 1 monitors the transmission confirmation signal X output from the flip-flop 44 in the high-level data link control device 4, transmits the new reception order number NR to the high-level data link control device 4, and then confirms the transmission. Since the signal X is set to logic "1", it is determined that the transmitted reception order number NR has been sent to the opposite data communication device.

Note that after transmitting the new reception sequence number NR to the high-level data link control device 4, since there is no information frame I to transmit to the opposite data communication device, the transmission r+v acknowledgment signal "
0'' continues for a predetermined period, the processor 1 instructs the transmission of a monitoring frame dedicated to transmitting the reception order number NR.

As is clear from the above description, according to the present embodiment, the processor 1 uses the transmission confirmation signal It becomes possible to confirm.

Note that FIGS. 2 and 3 are only one embodiment of the present invention, and for example, the data transmitting device to which the present invention is applied is
It goes without saying that the present invention is not limited to the high-level data link control device shown in the figure.

〔Effect of the invention〕

As described above, according to the present invention, in the data transmitting device,
It is now possible to check when the transmission of the reception sequence number stored in the reception sequence number storage means is completed.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the principle of the present invention, FIG. 2 is a diagram showing a high-level data link control device according to an embodiment of the present invention,
FIG. 3 is a diagram showing an example of a data communication device to which the present invention is applied, and FIG. 4 is a diagram showing an example of a conventional high-level data link control device. In the figure, 1 is a processor, 2 is a storage device, 3 is a direct memory access control device, 4 is a high-level data link control device, 41 is a high-level data link control section, 42 is a register, 43 is a setting section, and 44 is a flip-flop. (FF), 45 is the gate, ゛
100 is a data group, 200 is a data transmitting device, 3
00 is the receiving order number storage means, 400 is the receiving order number transmitting information] Mokkan 18n layer, 1 n

Claims (1)

[Claims] In a data transmission device (200) that continuously transmits a plurality of data groups (100), a reception sequence number storage means (300) that stores a reception sequence number (N_R) for confirming the latest received data. and reception sequence number transmission identification means (400) indicating that the reception sequence number (N_R) stored in the reception sequence number storage means (300) has been added to the data group (100) and transmitted.
A reception order number transmission confirmation method characterized by providing the following.