JPS5829239A - Data transmission system - Google Patents

Abstract

PURPOSE:To change a mode of data transmission to a terminal device freely by using a function selection signal transmitted from the side of a data transmitter to the side of the terminal device. CONSTITUTION:When a function code shows a high-reliability data transmission mode, outputs of gate circuits 81 and 82 are supplied to a comparing circuit 10, which compares and collates data transmitted through two systems of transmission lines 111 and 112 mutually; when the comparing circuit 10 outputs a coincidence signal, a control circuit 7 detects it to switch the gate circuits 81 and 82, thereby outputting data to receiving buffers 91 and 92. When the function mode shows a high-speed data transmission mode, the data collation by the comparing circuit 10 is not performed and the output of the gate circuit 81 and that of the gate circuit 82 are supplied to the receiving buffer 92 alternately and outputted together. Further, when it shows an independent data transmission mode by those two systems, the receiving buffers generate outputs separately.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a data transmission system in which a function of a terminal device can be selected by a function selection signal from a transmission side.

In general, when there are two data transmission systems, if the same information is transmitted through both router transmission systems and the received data is output only when the reception speeds of both sides match, It is known that the reliability of transmitted data is significantly improved. However, if the surrounding noise environment is not too bad, it is better to transmit one piece of information by dividing it into two data transmission systems, rather than going to the trouble of transmitting the same information using multiple data transmission systems. - The moderation of data transmission is increased. Conventionally, therefore, the choice has been made to either increase the data transmission speed depending on the noise level of the surrounding environment, or to make the data transmission speed uniform and instead increase the reliability of the transmitted data. The method is used. However, conventionally, in order to change the mode of data transmission, it is necessary to change the specifications of the terminal device each time, and the terminal device itself must be replaced, or a switch installed on the side of the terminal device must be replaced. The drawback was that it required manual switching, making operation cumbersome.

The present invention has been made in order to eliminate such drawbacks of the conventional example, and allows the mode of data transmission to the terminal device to be freely controlled by a function selection signal transmitted from the data transmitting device side to the terminal device side. You can change it to slow down or change the transmission system! It is intended to serve the public.

The configuration of the present invention will be described below with reference to illustrated embodiments. 11
Figure 1 shows the overall configuration of the router transmission system of the present invention, in which (1) represents a data transmitter, (2)
1) (z*) is a data receiving device. Data receiving device (21) (2 rich) Fi data buffer (31) (consisting of 3 ri and 7 anchors 4 (4t) (4t), data sent from data transmitting device + 1) is a data buffer (31) consisting of a shift register.
(31) is read once. Figure 2 shows the format of the router signal sent from the data transmitter +1).As shown in the figure, the beginning of the data signal includes a function code and a
- information regarding the number of evenings N, and after that, N data groups, the same number as the number N of data, are arranged. The data buffers (31) (3,) in the data receiving device (21) (2g) are arranged in a series of buffers as shown in FIG.
The function code and the number of data N at the beginning of the data signal are read and sent to the fascicator coater (4+) (4,), and this function code (
41) Decipher the Fancy 3'J code by (41). The decoded information is sent to the data receiving device (21) (
The control circuit (7)K in the terminal control circuit (7) is input to the terminal device (6) which together with the terminal control circuit (2,) constitutes the terminal device (6). Control circuit (
1) is a data buffer (3θ (3I)) and a gate circuit (S
t) (St) and the reception buffer (L) (9t), respectively, are controlled in accordance with the output of the funxio JjjI coater (4υ(4,)).

Furthermore, ``-'' is a comparison circuit that compares the data that is transmitted via two transmission lines (LLT) (LLT) during high-reliability 9-day transmission. And Toi.

Next, the operation of the present invention will be explained. In the present invention, ■high-reliability data transmission and high-speed data transmission are achieved.
-3 in 1 code with independent data transmission using 2 systems
It is possible to select one of the two death codes using a 7-axis code.

In the case of a highly reliable power transmission without trenches, the outputs of the gate circuits (81) (8,) are input to the comparison circuit (11) and transmitted via two transmission lines (ILX, 11V). 119 data are compared and verified with each other,
When a match signal is output from the comparator circuit, K is the control circuit.
The circuit (St)) detects this and the gate circuit (St) (8,
) and outputs data to the receiving buffer (9υ(9,) side. Data comparison by such a comparison circuit (1a) may be performed pit by pit, but it is It may be performed every 1 step.Next, in the case of high-speed data transmission mode, the comparison circuit (IIK) does not check the data, and the output of the gate circuit (8,) and the gate circuit ( The output of 88) is alternately input to the reception buffer (9 wealth) K, and the data transmitted separately from the two transmission lines (ll+Xll*) is output all at once from the reception buffer (98). For example, among 8 pits of data, the upper 4 pits are transmitted by one transmission line (11υ), the lower 4 pits are transmitted by the other transmission line (ttg), and the upper 4 pits are transmitted from the receive buffer (9,). This is to output an 8-pit router consisting of 4 pits and the lower 4 pits.This allows data transmission to be performed at twice the speed compared to data transmission using only one system. Furthermore, in the case of an independent 9 data transmission mode using two systems, a gate circuit (s+X
Receive buffers (9, 09m) K for each output of aρ
The data is directly outputted, and the 92 independent data sent via the transmission@(IL) (l1m) are outputted without interfering with each other.

The present invention is configured as described above, and includes a data buffer for temporarily storing received data, a function coder for decoding a function selection signal, a gate circuit connected to the output of the data buffer, and each gate. A comparison circuit that compares the outputs of the circuits, a reception buffer to which information in the data buffer is transferred, and a control circuit that controls opening/closing of the gate circuit and data transfer between the buffers are provided. Receive information in data buffer only when buffer 7
A high-reliability data transmission state in which the information in each data buffer is transferred to one of the receiving buffers in turn, and a high-speed data transmission state in which the information in each data buffer is transferred to each receiving buffer independently. Since the data transmission status of the two systems to be transferred can be freely switched according to the output of the function decoder, the transmission speed can be lowered when transmitting important data that requires relatively high reliability. Instead, it allows for highly reliable data transmission, and when transmitting relatively unimportant data or when the ambient noise level is low.
By transmitting information by dividing it into two transmission lines, K compared to using only one transmission line.
It has the advantage of being able to transfer data at double the speed, and even when it becomes necessary to transmit two independent data signals separately, the information in each data buffer is transferred as is to the receiving buffer. This has the advantage that it is possible to configure a data transmission chain of 92 completely independent lines, and since these various transmission states can be switched by the output of the function decoder, the data This has the advantage that by adding a function selection signal to the beginning of the data to be transmitted on the transmitter side, the mode of data transmission can be freely selected.

[Brief explanation of the drawing]

FIG. 2 is a block diagram of an embodiment of the present invention. FIG. 2 is a diagram showing a seven format transmission data format. (1) is a data transmitter, (3+) (3*) is a data buffer, (41) (41) is a Fi function decoder, ()) is a control circuit, (L) (8g) is a gate circuit,
(9+X9*) is a reception buffer, ■ is a comparison circuit, (il
l) (ilg) is a transmission line. Agent Patent Attorney Ishi 1) Chief 720

Claims (1)

[Claims] (1) Two transmission lines with a high Kfi, a data compensation device connected to one end of each transmission line Km, and a data compensation device connected to each transmission line O and the other end Km.
m@Ii, a data buffer that temporarily stores received data, a decoder that is connected to the data buffer and removes the nine function selection signals based on the previous application of one transmission data, and is connected to the output of each data buffer. 9 gate circuits, a comparison circuit that compares the output of each gate circuit, a receiving buffer that is connected to the output of each gate circuit and transfers the information in the data buffer, and The control circuit controls opening/closing of the gate circuit and data transfer from the data buffer to the reception buffer accordingly, and is highly reliable because the information in the data buffer is transferred to the reception buffer only when the inputs of the comparison circuit match. ! kf-data transmission state, and a high-speed data transmission state in which information in each data buffer is alternately transferred to one of the receiving buffers. A data transmission system characterized in that a multi-system data transmission state in which information in a data buffer is independently transferred to each receiving buffer can be switched according to the output of a function dacoter.