KR0132636Y1 - Data line connector using single communication line - Google Patents

Abstract

The present invention relates to a communication line connection device of a communication device, and more particularly, to a data line connection device using a single communication line for efficiently connecting the connection of several communication devices using a modulation method using a start bit.

That is, the multiplexer 20 modulates and multiplexes signals inputted from a plurality of communication terminal side communication devices 10, and the start bit generator 30 modulates start bits of signals multiplexed by the multiplexer 20; A transmission interface unit 40 for transmitting the signal modulated by the start bit generator 30 to a transmission line, a reception interface unit 50 for receiving communication data input through the transmission line, and the reception interface unit A start bit detection unit 60 for detecting start bits of the communication data received at 50 and multiplexed communication data input from the receiving interface unit 50 for detecting the start bits in the start bit detection unit 60; A demultiplexer 70 time-divided into a signal selected by the signal, and a shift register 80 which shifts and outputs a signal divided by the demultiplexer 70 to a corresponding communication terminal 90 at a receiving terminal. It is suitable for asynchronous communication and can connect and use various communication equipments because it transmits data that requires efficient device configuration and start bit.

Description

Data line connection device using single communication line

1 is a block diagram showing a data line connection apparatus using a single communication line according to the present invention.

* Explanation of symbols for main parts of the drawings

10: communication terminal side communication device 20: multiplexer

30: start bit generating unit 40: transmitting interface unit

50: receiving interface unit 60: start bit detection unit

70: demultiplexer 80: shift register

90: receiving terminal communication device

The present invention relates to a communication line connection device of a communication device, and more particularly, to a data line connection device using a single communication line to efficiently connect several communication devices using a modulation method using start bits.

In the conventional communication line, various communication devices were able to communicate through the data bus line. At this time, there are asynchronous and synchronous methods of communication data.

The asynchronous method is a transmission method in which a time interval between successive bits, carriers, or events is variable, and it is necessary to include timing information in a character or block transmitted from a data transmission system or a receiver. . In other words, even if a character or a block is transmitted and received at the same bit rate, the transmitter and the receiver are not operated in synchronization, and each character or block is completely independent and transmitted with bits indicating its start and end. .

In addition, the synchronization method is a method in which data is continuously given to a time base (clock) which is commonly used between the transmitter and the receiver. When no data is transmitted, the synchronization method is used to maintain synchronization between the receiver and the transmitter. A control character called SYNC) or idle is sent.

As such, synchronous and asynchronous have respective characteristics. However, the asynchronous type has a drawback in that it is suitable for low speed or medium speed data transmission and is limited in time because the asynchronous start and end bits are attached before and after each character or block to synchronize data.

In addition, the synchronous method has a disadvantage in that a circuit configuration and a device are complicated because a certain combination code is transmitted as a synchronous signal after transmitting several data in sequence.

Therefore, in this data transmission method, in order to modulate the communication data corresponding to each communication device, if the data for each communication device is modulated as a whole, the circuit configuration and system complexity and fast data communication are difficult to efficiently communicate. There was a difficult problem.

The present invention was devised to solve the problem of the data transmission method through a bus line as described above. In the asynchronous modulation method, only the start bit corresponding to the beginning of the data is modulated to transmit data of various communication devices. Accordingly, an object of the present invention is to provide a data line connection apparatus using a single communication line capable of efficient data communication.

In order to achieve the above object, the present invention provides a multiplexer for modulating and multiplexing signals input from a plurality of communication terminal side communication devices, a start bit generator for modulating start bits of a signal multiplexed in the multiplexer, and the start. A transmission interface for transmitting a signal modulated by the bit generator to the transmission line, a reception interface for receiving communication data input through the transmission line, and a start for detecting start bits of the communication data received at the reception interface A demultiplexer for time-dividing the multiplexed communication data input from the bit detection unit, the receiving interface unit into a signal selected by detection of the start bit in the start bit detection unit, and a signal divided by the demultiplexer to the corresponding receiving terminal communication device. Include shift register to shift output It is characterized configured over.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

1 is a block diagram showing a data line connection apparatus using a single communication line according to the present invention, a multiplexer 20 for modulating and multiplexing signals input from a plurality of communication terminal side communication devices 10, and the multiplexer A start bit generator 30 for modulating the start bits of the signal multiplexed at 20, a transmission interface 40 for transmitting the signal modulated by the start bit generator 30 to a transmission line, and a transmission line A reception interface unit 50 for receiving communication data input through the communication unit, a start bit detection unit 60 for detecting a start bit of communication data received from the reception interface unit 50, and the reception interface unit 50; A demultiplexer 70 for time division of the multiplexed communication data inputted from the start bit detection unit 60 into a signal selected by the detection of the start bit, and the demultiplexer 70 divided by the demultiplexer 70. A shift register 80 for shifting and outputting a signal to a corresponding communication terminal 90 at a receiving terminal is constructed.

The shift register 80 is a register for shifting binary data information to the left or the right, and is composed of a plurality of flip-flops and gates for controlling a shift operation. The transmission interface unit 40 and the reception interface unit 50 are parts that process communication between the modem and the terminal or the modem and the computer.

The operation and effects of the present invention configured as described above will be described in detail.

The present invention is a data line connection device of a communication device corresponding to a kind of digital modulation, and does not modulate the entire data of the transmission terminal side communication device 10, and the information or data output from the transmission terminal side communication device 10 is one. Is input to the multiplexer 20. The data input from the transmitting terminal side communication device 10 is multiplexed in the multiplexer 20. The multiplexer 20 transmits a signal by several communication devices 10 jointly using a single line. That is, it selects one of a plurality of input lines and loads it on the output line.

In this way, the data multiplexed by the multiplexer 20 modulates the part corresponding to the start bit of the data in the start bit generator 30. That is, in order to distinguish the data input from the plurality of communication devices 10, a predetermined number of start bits are divided and modulated by the data of the corresponding communication device 10. The start bit is the head bit sent to the receiving side to indicate the start of the transmitting side in the data transfer.

In this way, the data of the corresponding communication device 10 is partially modulated and transmitted through the transmission interface unit 40. The transmitted data is transmitted to the receiving interface unit 50 through a transmission line having a predetermined length. The data received by the receiving interface unit 50 detects the start bit modulated among the data of the corresponding communication device 10 by the start bit detection unit 60.

Further, the data received by the receiving interface unit 50 is input to the demultiplexer 70 and divided by the number corresponding to each communication terminal side communication device 10. At this time, the demultiplexer 70 is controlled by the start bit of the data detected by the start bit detection unit 60 and separated by the communication terminal 90 on the receiving terminal side. That is, the data output from any one of the transmitting terminal side communication device 10 is to connect to the communication device 90 corresponding to the receiving terminal side communication device 90. That is, for example, when data is transmitted through a modem at the transmitting terminal, the receiving terminal is separated and selected to be connected via a modem or directly to a computer.

The data information selectively output from the demultiplexer 70 is shifted to the left or right through the shift register 80 and output to the corresponding communication terminal 90.

The next bit with the start bit can be divided into a number of time-divided numbers by a decoder that can be multiplexed into information bits containing information. The start bit includes more rising or falling triggers than other information bits.

It is also possible to construct a device capable of loading a certain number or more of different device data among the devices that communicate the partial modulation of such data on the data line.

As such, since the start bit of the data is modulated using a single communication line of the present invention, it is efficient to use in communication equipment that does not transmit or receive frequently. Therefore, a program or a configuration necessary for transmission is compared with a data transmission device that modulates and demodulates as a whole. Simple, low installation cost and efficient device configuration are made, and since it transmits the data that requires the start bit, it is suitable for asynchronous communication, which can be used by connecting various communication equipment.

Claims (1)

A multiplexer 20 for modulating and multiplexing signals input from a plurality of transmission terminal side communication devices 10, a start bit generator 30 for modulating start bits of a signal multiplexed by the multiplexer 20, and A transmission interface unit 40 for transmitting the modulated signal from the start bit generator 30 to the transmission line, a reception interface unit 50 for receiving communication data input through the transmission line, and the reception interface unit 50. The start bit detection unit 60 detects the start bit of the communication data received by the receiver and the multiplexed communication data input from the receiving interface unit 50 is selected by the start bit detection unit 60 by detecting the start bit. A demultiplexer 70 for time division into signals and a shift register 80 for shifting and outputting a signal divided by the demultiplexer 70 to a corresponding communication terminal 90 at a receiving terminal. The data line connection system using a single communication line, characterized in that formed.