JPH0542022B2 - - Google Patents

Description

[Detailed Description of the Invention] [Summary] In a data transmission system comprising a transmission data buffer that stores transmission data to each accommodated communication line, and a transmission device that sequentially reads transmission data from the transmission data buffer and transmits it to each communication line. ,
Next, an area number indicating the area in the transmission data buffer where the transmission data should be stored is stored for each communication line,
Economical efficiency is improved by incrementing the area number by a counting circuit provided commonly to each communication line.

[Industrial application field]

The present invention provides address management that makes it possible to economically specify an area for storing transmission data in a transmission data buffer in a data transmission system in which transmission data stored in a transmission data buffer is sequentially read out and transmitted to a plurality of communication circuits. Regarding the method.

[Conventional technology]

7 is a diagram showing an example of a conventional address management system, FIG. 8 is a diagram showing an example of the transmission data buffer in FIG. 7, and FIG. 9 is a diagram showing an example of the line memory in FIG. 7. and the first
FIG. 0 is a diagram showing an example of the transmission request buffer in FIG.

7 to 10, the transmission data buffer (SDB) 1 has an area (hereinafter referred to as surface 11
) are provided for each of the four sides of each communication line 4.

The transmission multiplexing device (SND) 2 is incremented by the channel number i output from the channel counting circuit (CHC) 6 which increments at a predetermined period and by the built-in readout surface counting circuit (CNT) 21, and stores the line memory ( The transmission data dij is extracted in parallel form from the surface 11 in the transmission data buffer 1 specified by the readout surface number jri stored in the LM) 5, and is temporarily stored in the line memory 5, and then sent to the separation device (DMX) 3. is the channel number i supplied from the channel counting circuit 6
The data is transmitted in serial format to the communication line 4 connected by the .

Further, the transmission multiplexing device 2 extracts the transmission data dij from the transmission data buffer 1 and sends it to the corresponding communication line 4, and then the transmission multiplexing device 2 extracts the transmission data dij from the transmission data buffer 1 and sends it to the corresponding communication line 4. A write request signal we is input to the request buffer (RQB) 7.

The transmission request buffer 7 that has received the write request signal we stores the channel number i input from the channel counting circuit 6.

On the other hand, a processing device (not shown) inputs a read request signal re to the transmission request buffer 7, extracts the channel number i stored in the transmission request buffer 7 on a first-come-first-served basis, reads it into the processing device, and transmits the data. It is also transmitted to the data buffer 1, decoder (DCR) 8 and selector (SEL) 10.

The processing device uses the communication line 4 specified by the channel number i extracted from the transmission request buffer 7.
The transmission data dij to be sent to the write request signal we
It is also input to the transmission data buffer 1.

On the other hand, a counting circuit (CNT) 9i is provided corresponding to each communication line 4, and is incremented by the increment signal ci transmitted from the decoder 8, and then the processing device in the transmission data buffer 1 receives the transmission data dij. The writing surface number jwi of the surface 11 to be stored is counted and held.

The selector 10 selects the counting circuit 9i corresponding to the channel number i transmitted from the transmission request buffer 7, and transmits the writing surface number jwi held by the selected counting circuit 9i to the transmission data buffer 1.

Transmission data buffer 1 is transmission request buffer 7
The channel number i transmitted from the selector 10
The writing surface number transmitted from the counting circuit 9i via
The transmission data dij input from the processing device is stored in the field 11 designated by jwi.

On the other hand, the decoder 8 includes a counting circuit 9i corresponding to the channel number i transmitted from the transmission request buffer 7.
Inputs an increment signal ci to increments the held writing surface number jwi to prepare for writing the next transmission data dij.

[Problem that the invention seeks to solve]

As is clear from the above explanation, in the conventional address management system, the transmission data buffer 1
In order to increment and hold the writing surface number jwi that stores the transmission data dij, a counting circuit 9 is provided for each communication line 4.
i was set up.

Therefore, as the number of accommodated communication lines 4 increases, it is necessary to add counting circuits 9i, which may impair the economic efficiency of the data transmission system.

[Means for solving problems]

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

In FIG. 1, 4 is a communication line, 100 is a transmission data buffer, and 101 is a transmission data buffer 1.
A plurality of areas 00 are provided corresponding to each communication line 4 to store transmission data to be sent to the communication line 4, and 200 is an area for sequentially extracting each transmission data stored in the transmission data buffer 100, 300 is a transmitting device 200 that transmits data to
is line number counting means indicating the communication line 4 through which the transmission data is transmitted.

Reference numeral 400 denotes area number storage means provided within the transmitting device 200 according to the present invention.

Reference numeral 500 denotes area number counting means provided within the transmitting device 200 according to the present invention.

[Effect]

The area number storage means 400 stores the number j of the area 101 in which the subsequent transmission data is to be stored in the communication line 4.
Memorize each time.

The area number counting means 500 increments the area number j stored in the area number storage means 400.

The transmitting device 200 stores the area number j stored in the area number storage means 400 and the line number counting means 300.
The line number i outputted by is input to the transmission data buffer 100 in order to write subsequent transmission data.

Therefore, there is no need to provide a counting circuit for each accommodated communication line in order to increment and hold the area number for supplementing the transmission data, and the economical efficiency of the data transmission system is improved.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 2 is a diagram showing an address management system according to an embodiment of the present invention, FIG. 3 is a diagram showing an example of the line memory in FIG. 2, and FIG. 4 is a diagram showing an example of the line memory in FIG.
FIG. 5 is a diagram showing an example of the writing surface counting circuit in FIG. 2; FIG. 6 is a diagram showing an example of the transmission data writing process in FIG. 2; FIG. It is a diagram. Note that the same reference numerals indicate the same objects throughout the figures.

In FIGS. 2 and 3, a line memory (LM) 50 stores the writing surface number jwi corresponding to each communication line 4 as an area number storage means 400, and a transmission multiplexing device (SND) 20 Inside,
A writing surface counting circuit (CNT) 22 is provided as area number counting means 500.

2 to 6, the transmission data buffer (SDB) 1 has 16
The surface 11 for storing the transmission data dij to be sent to the communication line 4 of the line is 4 for each communication line 4.
It is provided for both sides.

Similarly to the above, the transmission multiplexing device 20 receives the channel number i output from the channel counting circuit (CHC) 6 provided as the line number counting means 300.
and the transmission data buffer 1 specified by the readout surface number jri stored in the line memory 50.
From the inner surface 11, the transmission data dij is extracted in parallel format and temporarily stored in the line memory 50, and the separation device (DMX) 3 is connected to the communication line 4 using the channel number i supplied from the channel counting circuit 6.
Send in serial format.

Further, the transmission multiplexing device 20 extracts the transmission data dij from the transmission data buffer 1 and sends it to the corresponding communication line 4. Next, the transmission multiplexing device 20 extracts the transmission data dij from the transmission data buffer 1 and sends it to the corresponding communication line 4. Extracts the writing surface number jwi corresponding to the line number i from the memory 50 and sends the writing request signal
It is input to the transmission request buffer (RQB) 70 along with we.

The transmission multiplexing device 20 also includes a line memory 50
The writing surface number jwi extracted from the writing surface number jwi is inputted to the writing surface counting circuit 22 provided in common to each communication line 4 together with the step signal c set to logic "1".

In the writing surface counting circuit 22, when the input step signal c is set to logic "0", that is, when there is no need to replenish the transmission data dij,
Gates G2 and G3 are input writing surface numbers.
The bits b0 and b1 that make up jwi in binary format are then output, and the next writing surface number is stored in the line memory 50.
Store as jwi. That is, the step signal c is logic "0"
In the case of , that is, when it is necessary to replenish the transmission data dij, gates G2 and G3 add 1 to the writing surface number jwi consisting of input bits b0 and b1 and output it, and the line memory 50 is stored as the next writing surface number jwi. That is, when the increment signal c is logic "1", the writing surface number jwi is incremented by one step and stored, in preparation for writing the next transmission data dij.

On the other hand, the transmission request buffer 70 that has received the write request signal we stores the writing surface number jwi inputted from the transmission multiplexing device 20 and the channel number i inputted from the channel counting circuit 6.

On the other hand, a processing device (not shown) inputs the read request signal re to the transmission request buffer 70, extracts the channel number i and the writing surface number jwi stored in the transmission request buffer 70 on a first-come-first-served basis, and outputs At the same time, it is also transmitted to the transmission data buffer 1.

The processing device sends the transmission data dij to be transmitted to the communication line 4 specified by the channel number i extracted from the transmission request buffer 70 using a write request signal.
input into the transmission data buffer 1 along with we.

Transmission data buffer 1 is transmission request buffer 7
The transmission data dij input from the processing device is stored in the surface 11 designated by the channel number i transmitted from 0 and the writing surface number jwi.

As is clear from the above description, according to this embodiment, the writing surface number jwi for replenishing the transmission data buffer 1 with transmission data dij is stored in the line memory 50 for each communication line 4, and Since the writing surface counting circuit 22 is provided in common for each communication line 4, there is no need to provide a counting circuit 9i (FIG. 7) for each communication line 4.

Note that FIGS. 2 to 6 are only one embodiment of the present invention, and for example, the number of communication lines accommodated and the number of screens provided for each communication line 4 are limited to 16 lines and 4 screens, respectively. Although many other modifications may be considered, the effects of the present invention remain the same in any case.

〔Effect of the invention〕

As described above, according to the present invention, in the data transmission system, there is no need to provide a counting circuit for each accommodated communication line in order to increment and hold the area number for replenishing the transmission data, making the data transmission system economical. will improve.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the principle of the present invention, FIG. 2 is a diagram showing an address management system according to an embodiment of the present invention,
3 shows an example of the line memory in FIG. 2, FIG. 4 shows an example of the transmission request buffer in FIG. 2, and FIG. 5 shows an example of the writing surface counting circuit in FIG. 2. 6 is a diagram illustrating the transmission data writing process in FIG. 2, FIG. 7 is a diagram illustrating an example of a conventional address management system, and FIG. 8 is a diagram illustrating an example of the transmission data buffer in FIG. 7. , FIG. 9 is a diagram showing an example of the line memory in FIG. 7, and FIG. 10 is a diagram showing an example of the transmission request buffer in FIG. 7. In the figure, 1 and 100 are transmission data buffers (SDB), 2 and 20 are transmission multiplexing devices (SND), 3 is a demultiplexing device (DMX), 4 is a communication line,
5 and 50 are line memories (LM), 6 is a channel counting circuit (CHC), 7 and 70 are transmission request buffers (RQB), 8 is a decoder (DCR), 90 to 915 are counting circuits (CNT), and 10 is a selector. (SEL), 21 is a reading surface counting circuit (CNT), 22 is a writing surface counting circuit (CNT), 200 is a transmitter, 3
00 indicates line number counting means, 400 indicates area number storage means, and 500 indicates area number counting means.

Claims (1)

[Claims] 1. A plurality of areas 1 each storing transmission data.
01, a transmission data buffer 100 provided corresponding to each communication line 4, and a transmission device 200 that sequentially reads each transmission data stored in the transmission data buffer 100 and transmits it to each communication line 4.
In a data transmission system comprising: the area 1 in which the subsequent transmission data is to be stored;
The transmitting device 200 is provided with an area number storage means 400 for storing a number j of 01 for each communication line 4, and an area number counting means 500 for incrementing the area number j stored in the area number storage means 400. , The area number j stored in the area number storage means 400 and the line number i outputted by the line number counting means 300 indicating the communication line 4 through which the transmitting device 200 transmits the transmission data are stored in the transmitter. In order to write the subsequent transmission data into the data buffer 100, the area number j indicating the area in the transmission data buffer 100 where the transmission data should be stored is input to the communication line 4.
This address management method is characterized in that the area number j is stored for each communication line 4, and the area number j is incremented by an area number counting means 500 provided commonly to each communication line 4.