JPS6237584B2 - - Google Patents

Abstract

PURPOSE:To decarese processing loads of CPU and a communication control unit by adding function of multiple transmission to the communication control unit at the time of the transmission of mass information. CONSTITUTION:Before the start of multiple address transmission, the number of multiple address destination sent from CPU 200 by the initiation of channel is set on multiple counter CNT 300 of communication control unit CCU 270 through data channel DCH 230. After the transmission data stored in File 210 is transferred to message buffer 200, the data are transferred to character buffer 240 of CCU 270 through DCH 230 by one initiation of channel and are synchronized with the time division multiplex clock; then, the descrete value given by CNT 300 is divided by time division multiplex circuit 250 and the contents of the same character buffers are supplied to circuit 290 of highway 280, so that multiple address transmission is available.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to broadcast communication for transmitting the same data, images, and other information to multiple destinations, and particularly to a transmission method for transmitting a large amount of information.

Conventionally, in this type of broadcast transmission system, as shown in FIG.
After transferring the message to the message buffer 120 for the number of transmission destinations under the control of the CPU (hereinafter referred to as CPU), the data channel 130 is activated by starting channels for the number of transmission destinations.
(hereinafter referred to as DCH) via the communication control device 170
(hereinafter referred to as CCU) internal character buffer 14
Transfer to 0,141,142,143,144,
The time division multiplexing circuit 150 (hereinafter referred to as CLK) follows the time division multiplexed clock of the oscillator 160 (hereinafter referred to as CLK).
(referred to as MPX)
(hereinafter referred to as HW) 19 lines for the number of transmission destinations on
0 (A, B, C, D, E) for broadcast transmission.

Therefore, from File 110 to message buffer 1
Information transfer to CCU 170, information transfer to CCU 170, and channel activation for information transfer are required for the number of transmission destinations.
00, the disadvantage was that the load on the DCH 130 and CCU 170 increased.

When transmitting a large amount of the same data to multiple destinations, the present invention reduces the processing load on the central processing unit and communication control device by simultaneously transmitting the same data to multiple destinations with one channel control from the central processing unit. The purpose is to provide a method to reduce the

The broadcast communication method of the present invention has a function of multiplexing the same information on a time-division multiplex transmission path, and a communication control device connected to a central processing unit through a channel interface uses multiplexing to maintain the number of broadcast destinations. a character buffer that accumulates messages to be sent; and multiplexing that synchronizes with a time division multiplexing clock and multiplexes messages in the character buffer by the number of broadcast destinations indicated by the multiplexing counter. and setting the number of broadcast destinations instructed by the central processing unit in the multiplexing counter, while transmitting the transmitted messages stored in the file to the message buffer, and transmitting the transmitted messages to the message buffer once. Upon activation, the transmitted message of the message buffer is transferred to the character buffer, and the number of broadcast destinations set in the multiplexing counter is equal to the number of broadcast destinations.
The present invention is characterized in that the multiplexer sends the contents of the character buffer to the time division multiplex transmission line in synchronization with a time division multiplex clock.

Next, an embodiment of the present invention will be described with reference to FIG. CPU200, File210, Message buffer 220, DCH230, CCU270, Character buffer 240, MPX250, CLK2
60, the functions of HW280 are the same as in Figure 1,
It further includes a multiplexing counter 300 (hereinafter referred to as CNT) that provides the number of lines through which the same information is transmitted.

First, before broadcast transmission, the number of broadcast destinations to be transmitted from the CPU 200 by starting the channel is set to the DCH2.
30 to the CNT 300 in the CCU 270.

Next, after transferring the transmission data accumulated in the File 210 to the message buffer 220, the transmission data is transferred to the CCU 2 via the DCH 230 by one channel activation.
Transfer to character buffer 240 within 70,
Synchronized with CLK260 time division multiplexed clock,
The contents of the same character buffer are converted to HW280 by MPX250 for the count value given by CNT300.
Broadcast transmission can be performed by placing the data on the upper line 290 (A, B, C, D, E).

That is, File 210 is accessed once, message buffer 220 is accessed once, DCH 230 is accessed twice, character buffer 240 is accessed once, and so on.
It is possible to multiplex transmit the same data for the number of lines given by the CNT 300.

As explained above, the present invention adds the same information multiplexing transmission function that utilizes the existing time division multiplexing function to the communication control device connected to the time division multiplexing transmission line. This has the effect of reducing the processing load on the central processing unit and communication control unit.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a conventional broadcast transmission system, and FIG. 2 is a block diagram showing an embodiment of the present invention. 100,200: Central processing unit (CPU), 11
0,210: File device (File), 120,2
20: Message Buffer, 130,
230: Data channel (DCH), 140, 14
1,142,143,144,240: Character buffer, 150,250: Time division multiplex circuit (MPX), 160,260: Time division multiplex oscillator (CLK), 170,270: Communication control unit (CCU) , 180, 280: time division multiplex transmission line (HW), 190, 290: line, 300: multiplex counter (CNT).

Claims (1)

[Scope of Claims] 1. In a communication control device that has a function of multiplexing the same information on a time division multiplex transmission path and is connected to a central processing unit through a channel interface, a multiplexing counter that maintains the number of broadcast destinations is provided. a character buffer that stores messages to be sent; and a multiplexer that synchronizes with a time division multiplexing clock and multiplexes the messages in the character buffer by the number of broadcast destinations indicated by the multiplexing counter. , and sets the number of broadcast destinations instructed by the central processing unit in the multiplexing counter, and on the other hand, after transmitting the transmitted messages stored in the file to the message buffer, by starting the channel once. The message sent from the message buffer is transferred to the character buffer, and the multiplexer transfers the message to the character buffer by the number of broadcast destinations set in the multiplexing counter in synchronization with the time division multiplex clock. A broadcast transmission method characterized by sending the contents to a time division multiplex transmission channel.