KR20030072924A - Apparatus and method for communication of data - Google Patents

Abstract

PURPOSE: A data communication apparatus and a method thereof are provided to transmit/receive data even though there is a transmission error in one of a transmission signal line and a receiving signal line. CONSTITUTION: The first transmission part(560) is connected to the first transmission line(570) and transmits downward data. The second transmission part is connected to the second transmission line and transmits upward data. A line selection part(540) selects at least more than one combined usage line capable of transmission and receiving among the first and the second transmission line. And a time division control part(550) divides a transmission time and a receiving time as to the combined usage line.

Description

Apparatus and method for communication of data

The present invention relates to a data communication apparatus and method, and more particularly, to a data communication apparatus and method that can control the transmission line to selectively transmit, receive and transmit and receive.

In data transmission, a technique of dividing time or space is used. Time division, a technique of time division, sends bits of individual information in sequence, ie, serially. In contrast, spatial partitioning sends bits in parallel across multiple lines. In terms of computer hardware and data transfer, serial connections are simple and slow, while parallel connections are fast. However, one of the serial transmission media, optical cable, transmits data much faster than the media that send multiple signals in parallel. Transmission lines for transmitting data serially include RS232C, RS422, and RS485. Serial communication using this is easy to implement, has a small distance limit, and lowers the implementation cost compared to parallel communication.

1 is a block diagram showing the basic configuration of a conventional data transmission and reception system, Figure 2 is a block diagram showing the basic configuration of a conventional data transmission and reception apparatus.

Referring to FIG. 1, the conventional data transmission / reception system 100 may include the first and second data transmission / reception apparatuses 200 and 200 ′, the first and second transmission serial buses 110 and 120, and the clock signal line 130. Have The first data transmitting and receiving device 200 transmits and receives data using an external connection line 200a connected to an external data device. The first and second transmission serial buses 110 and 120 connect the first and second data transmission and reception devices 200 and 200 ′. The first transmission serial bus 110 transmits data input through the external connection line 200a to the second data transmission / reception apparatus 200 ′. The second data transmission / reception apparatus 200 ′ transmits and receives data using the external connection line 200 ′ a. The second transmission serial bus 120 transmits data output from the second data transmission / reception apparatus 200 ′ to the first data transmission / reception apparatus 200. That is, the first and second transmission serial buses 110 and 120 connect the first and second data transmission and reception devices 200 and 200 ′ to transmit and receive data. The clock signal line 130 synchronizes the first and second transmission serial buses 110 and 120 between the first and second data transceivers 200 and 200 ′.

Referring to FIG. 2, the conventional first data transmission / reception apparatus 200 may include an interface unit 210, a first converter 220, a signal transmitter 230, a signal receiver 240, and a second converter 250. Has Conventional first and second data transmission and reception devices 200 and 200 ′ have the same configuration, and FIG. 2 will be described using the first data transmission and reception device 200 as an example.

The interface unit 210 of the first data transmission / reception apparatus 200 is connected to an external connection line 200a connected to an external data device. The interface unit 210 converts user data input from an external data device into usable signals and outputs them. User data (user_data) is output as parallel data. The first converter 220 converts the signal-converted user data into serial data. As illustrated in FIG. 3, the first conversion unit 220 adds frame start information (frame_start) to the front of the input user data and frame end information (frame_end) to the rear of the user data, thereby adding a serial data frame (data_frame). Create The generated serial data frame is transmitted to the signal transmitter 230.

The signal transmitter 230 converts the serial data frame converted into serial data into a serial data signal data_signal that can be transmitted and outputs the serial data frame to the first transmission serial bus 110. The serial data signal is transmitted to the second data transmission / reception apparatus 200 ′ via the first transmission serial bus 110.

Meanwhile, the second transmission serial bus 120 transmits the serial data signal output from the second data transmission / reception apparatus 200 ′ to the signal receiver 240. In other words, the first and second transmission serial buses 110 and 120 are movement paths for transmitting and receiving data between the first and second data transmission / reception apparatuses 200 and 200 '.

The signal receiver 240 converts the received serial data signal into a serial data frame and outputs the serial data frame. The converted serial data frame is serial data. The second converter 250 converts the received serial data into parallel data. The second converter 250 removes the frame start information and the frame end information from the serial data frame in the form of serial data. That is, the second converter 250 extracts only user data and sends the extracted user data to the interface unit 210. The interface unit 210 transmits the user data in the form of parallel data to the external device through the external connection line 200a.

However, such a conventional data transmission / reception system transmits serial data signals, and thus bidirectional communication is impossible. This means that the signal line for transmitting the serial data signal and the signal line for receiving the serial data are different from each other. Therefore, even if the received data is relatively larger than the transmitted data, the transmission signal line only transmits data but does not receive it. In addition, if an error occurs in any one of the transmission signal line and the reception signal line, transmission or reception of the serial data becomes impossible. As a result, there is a problem that the efficient transmission of data is difficult.

The present invention has been made to solve the above problems, the technical problem to be achieved by the present invention, the data that can transmit and receive data even if a transmission failure occurs in any one of the two transmission signal line and the receiving signal line It is to provide a communication device and method.

Another object of the present invention is to provide a data communication apparatus and method for adaptively allowing two signal lines to respectively transmit and receive data according to the amount of data transmitted through the transmission signal line and the amount of data received through the reception signal line. To provide.

1 is a block diagram showing the basic configuration of a conventional data transmission and reception system;

Figure 2 is a block diagram showing the basic configuration of a conventional data transmission and reception apparatus

3 illustrates an embodiment of a conventional serial data frame;

4 is a block diagram showing the basic configuration of a data communication system according to the present invention;

5 is a block diagram showing the basic configuration of a first data communication apparatus according to the present invention;

6 is a block diagram showing the configuration of a time division controller of a data communication apparatus according to the present invention;

7 illustrates an embodiment of a downlink data frame to which uplink start information is added according to the present invention;

8 is a block diagram showing the basic configuration of another embodiment of a data communication apparatus according to the present invention;

9 is a block diagram showing the basic configuration of a second data communication apparatus according to the present invention;

10 is a flowchart illustrating an embodiment of a data communication method according to the present invention;

11 is a flowchart illustrating another embodiment of a data communication method according to the present invention.

Explanation of symbols on the main parts of the drawings

500, 800: First data communication device 520, 820: First data conversion unit

530, 830: second data conversion unit 540, 840: line selection unit

550, 850: time division controller 560, 860: first transmitter

570, 870: second transmission unit 880: transmission control information generation unit

890: transmission control unit 900: second data communication device

In order to achieve the above object, the data communication apparatus according to the present invention, the first transmission line is connected to the first transmission line for transmitting downlink data; A second transmitter connected to a second transmission line and receiving uplink data; A line selection unit for selecting at least one of the first and the second transmission lines that can be transmitted and received; And a time division controller for dividing a transmission time and a reception time with respect to the combined line.

In more detail, the line selection unit selects the combined line by comparing data amounts of the downlink data and the uplink data. The line selector may determine whether the first and second transmission lines have an error and select a line where no error occurs as the combined line. The time division controller may include: a transmission control information generation unit generating transmission control information including identification information of the selected combined line and the divided reception time; And an information adding unit for adding the generated transmission control information to the downlink data.

Furthermore, the data communication apparatus according to the present invention comprises: a transmission control information generation unit for generating transmission control information including identification information of the selected combined line and the divided reception time; And a transmission control unit for transmitting the transmission control information through a transmission control line provided separately.

On the other hand, the data communication apparatus according to the present invention, the first transmission line connected to the first transmission line for receiving downlink data; A second transmitter connected to a second transmission line and transmitting uplink data; And a time division controller configured to control the transmission of the uplink data according to transmission control information including identification information on the at least one selected transmission line of the first and second transmission lines and a transmission time of the uplink data. Include.

Preferably, the transmission control information is added to the received downlink data. The apparatus may further include a transmission control unit configured to receive the transmission control information through a separate transmission control line.

On the other hand, the data communication method according to the present invention, a line selection step of selecting at least one or more of the combined line that can be transmitted and received among the first and second transmission line; A time division control step of dividing a transmission time and a reception time for the selected combined line; And an information transmission step of transmitting downlink data by the identification information of the combined line and the divided reception time.

More specifically, the line selection step selects the combined line by comparing the data amounts of the downlink data and the uplink data. In addition, in the line selection step, it is determined whether an error exists in the first and second transmission lines and selects a line in which no error occurs as the combined line.

The time division control step may include: an information generation step of generating transmission control information including identification information of the selected combined line and the divided reception time; And an information adding step of adding the generated transmission control information to the downlink data. In addition, the data communication method according to the present invention comprises: an information generating step of generating transmission control information including identification information of the selected combined line and the divided reception time; And an information transmitting step of transmitting the transmission control information through a separate transmission control line.

Preferably, the information receiving step of receiving the identification information of the combined line, the reception time of the divided uplink data and the uplink data; And a second time division control step of dividing a reception time of the uplink data with respect to the combined line.

According to the present invention, it is possible to efficiently transmit data by controlling the transmission line to selectively transmit, receive, and transmit and receive.

Hereinafter, a data communication apparatus and method according to the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

4 is a block diagram showing a basic configuration of a data communication system according to the present invention, Figures 5 and 9 are block diagrams showing a basic configuration of an embodiment of the first and second data communication apparatus according to the present invention. .

Referring to FIG. 4, the data communication system 400 according to the present invention includes first and second data transmitting and receiving devices 500 and 900, first and second transmission serial buses 410 and 420, and a clock signal line 430. Has The first data transmission / reception apparatus 500 transmits and receives data using an external connection line 500a connected to an external data device. The first and second transmission serial buses 410 and 420 connect the first and second data transmission and reception devices 200 and 900. The first transmission serial bus 410 transmits data input through the external access line 500a to the second data transmission / reception apparatus 900. The second data transmission / reception apparatus 900 transmits and receives data using the external connection line 900a. The second transmission serial bus 420 transmits data output from the second data transmission / reception apparatus 900 to the first data transmission / reception apparatus 500. That is, the first and second transmission serial buses 410 and 420 connect the first and second data transmission and reception devices 500 and 900 to transmit and receive data. The clock signal line 430 synchronizes the first and second transmission serial buses 410 and 420 between the first and second data transmission / reception apparatuses 500 and 900.

Referring to FIG. 5, the first data communication device 500 according to the present invention includes an interface 510, a first data converter 520, a second data converter 530, a line selector 540, and time division. The controller 550 includes a first transmitter 560 and a second transmitter 570. Hereinafter, the first data communication device may be a master data communication device 500, and data transmitted to the outside from the master data communication device 500 may be down_data and data coming into the master data communication device 500 from the outside. Is called up_data. In FIG. 5, the first and second transmission lines 562 and 572 are shown by dotted lines.

The interface 510 is connected to an external connection line 500a that is connected to an external data device. The interface 510 converts user data (user_data) input from an external data device, that is, downlink data, into usable signals and outputs the converted signals. The downlink data is output as parallel data.

The first data converter 520 converts the signal-converted downlink data into serial data and temporarily stores the converted data. In addition, as illustrated in FIG. 7, the first data converter 520 adds downlink frame start information (down_frame_start) to the front of the downlink data and downframe frame information (down_frame_end) to the rear end of the downlink data. Create (down_data_frame). The generated downlink data frame is transmitted to the time division controller 550.

The second data converter 530 generates uplink data by removing upframe start information (up_frame_start) and upframe end information (up_frame_end) of uplink data frames (up_data_frame) d input in parallel. Uplink data is serially converted and / or temporarily stored in the second data converter 530.

The line selector 540 selects at least one combined line capable of transmitting and receiving from each of the first and second transmission lines 562 and 572 connected to the first and second transmitters 560 and 570. At this time, the line selector 550 selects the combined line by comparing the data amounts of the downlink data frame and the uplink data frame. In the master data communication device 500, the first transmitter 560 and the first transmission line 562 are devices provided for transmission of downlink data frames. However, for example, when the amount of uplink data is relatively larger than the downlink data, the line selector 540 selects the first transmission line 562 as a combined line to receive the uplink data frame.

In addition, the line selector 540 determines whether the first and second transmission lines 562 and 572 have errors and selects a line having no error as a combined line. For example, when an error occurs in the first transmission line 562 provided for transmission of a downlink data frame in the master data communication device 500, the line selector 540 converts the second transmission line 572 into a combined line. Select to enable the transmission of downlink data.

The time division controller 550 divides the downlink data transmission time and the uplink data reception time for the selected combined line.

In an embodiment of the master data communication device 500 according to the present invention of FIG. 5, the time division controller 550 has a transmission control information generation unit 552 and an information adding unit 554 as shown in FIG. 6. The transmission control information generation unit 552 generates transmission control information including the identification information of the selected combined line and the reception time of the divided uplink data.

The information adding unit 554 adds the transmission control information generated by the transmission control information generating unit 552 to the downlink frame start information of the downlink data frame. That is, as shown in FIG. 7, a downlink data frame to which an uplink data frame is added is generated. The external data communication device receives the downlink data frame containing the size information of the uplink data frame. Then, the external data communication device creates and transmits an uplink data frame according to the allowable size information of uplink data in the downlink frame start information through the combined line.

The first transmitter 560 is connected to the first transmission line 562 and transmits a downlink data frame. The second transmitter 570 is connected to the second transmission line 572 and receives an uplink data frame. However, the first and second transmitters 560 and 570 may selectively transmit and receive data based on the identification information of the combined line selected by the line selector 540 and the time division information of the reception time. The first and second transmission lines 562 and 572 preferably use serial data buses.

In addition, as another embodiment of the data communication apparatus of FIG. 5, the master data communication apparatus 800 further includes a transmission control information generation unit 880 and a transmission control unit 890 as shown in FIG. 8.

Referring to FIG. 8, the interface 810, the first and second data converters 820 and 830, the line selector 840, the first transmitter 860, and the second transmitter 870 are illustrated in FIG. 5A. The structure and function of the interface 510, the first and second data converters 520 and 530, the line selector 540, the first transmitter 560 and the second transmitter 570 described with reference to FIG. Since the same, detailed description is omitted. In FIG. 8, the first and second transmission lines 862 and 872 and the transmission control line 892 are illustrated by dotted lines.

The transmission control information generator 880 receives the identification information of the combined line selected from the line selector 840 and the reception time of the uplink data divided from the time division controller 850. Then, the transmission control information is generated from the identification information and the divided reception time information. The control transmission unit 890 transmits transmission control information through a transmission control line 892 provided in the master data communication device 800. That is, the downlink data frame generated by the first data converter 820 is output to the first transmitter 860 via the time division controller 850, and the identification information and the time division information of the combined line are separate transmission control lines ( 892 to an external data communication device.

9 is a block diagram showing the basic configuration of a second data communication apparatus according to the present invention.

9, the second data communication apparatus 900 according to the present invention includes a first transmitter 910, a second transmitter 920, a time division controller 930, a first data converter 940, The second data converter 950 and the interface 960 are provided. Hereinafter, the second data communication device is referred to as a slave data communication device 900, data received from the outside is downlink data, and data transmitted to the outside is uplink data. In FIG. 9, the first and second transmission lines 912 and 922 and the transmission control line 972 are shown by dotted lines.

The first transmitter 910 is connected to the first transmission line 912 and receives the downlink data frame transmitted from the outside. The second transmitter 920 is connected to the second transmission line 922 and transmits uplink data to the outside. The first data converter 940 extracts only downlink data by removing downlink start information and downframe end information of the received downlink data frame. The downlink data in parallel form is converted to serial data and temporarily stored, and then output to the interface 960.

The second data converter 950 converts and temporarily stores user data, that is, upstream data, input from the outside through the interface 960 to parallel data. In addition, the second data converter 950 generates an uplink data frame by adding uplink start information to the front of the uplink data and uplink end information to the rear end of the uplink data. The generated uplink data frame is transmitted to the time division controller 930.

The time division controller 930 controls the uplink data frame to be transmitted according to the received transmission control information added to the downlink data frame. The received transmission control information has identification information of a dual-communication line capable of transmitting / receiving among the first and second transmission lines 912 and 922 and uplink data size information in downlink frame start information. The time division controller 930 controls to transmit the uplink data frame according to the uplink data allowance size information.

In another embodiment different from the above-described embodiment, the transmission control unit may be transmitted on a separate line without being added to the downlink data frame and transmitted. This is transmitted by the transmission control unit 970 provided in the slave data communication device 900 separately. The transmission control unit 970 receives the transmission control information through the transmission control line 972 provided. The time division controller 930 controls to transmit the uplink data frame based on the received transmission control information. The transmission control information includes identification information of at least one combined line capable of transmitting and receiving and reception time information of divided downlink data frames.

10 is a flowchart illustrating an embodiment of a data communication method according to the present invention.

5 and 10, in the data communication method according to the present invention, the master data communication apparatus 500 selects one or more combined lines capable of transmitting and receiving among the first and second transmission lines 562 and 572. (S1010). The line selector 540 selects a combined line capable of transmitting and receiving by comparing the data amounts of the downlink data frame and the uplink data frame. For example, the first transmission line 562 is a line for transmitting a downlink data frame, but when the amount of uplink data is larger than the downlink data, the line selector 540 moves upward through the first transmission line 562. Receive data frames. In addition, the line selector 540 determines whether the first and second transmission lines 562 and 572 have errors and selects a line in which no error occurs as a combined line. For example, when an error occurs in the first transmission line 562 for transmitting the downlink data frame, the line selector 540 selects the second transmission line 572 for receiving the uplink data frame to select the downlink data frame. Enable transmission.

When the combined line is selected, the transmission time of the downlink data frame and the reception time of the uplink data are divided for the combined line (S1020). In operation S1030, transmission control information including identification information on the combined line and a reception time of the divided uplink data is generated. The generated transmission control information is added to the downlink data (S1040) and transmitted through the combined line (S1050). With reference to the control information signal added to the downlink data, the external data communication apparatus transmits the identification information of the combined line and the uplink data frame. That is, the master data communication device 500 receives the identification information and the uplink data frame of the combined line (S1060). Then, the time division controller 550 divides the reception time of the uplink data for the combined line (S1070).

11 is a flowchart illustrating another embodiment of a data communication method according to the present invention. 8 and 11, in the data communication method according to the present invention, since steps S1110 to S1130 are the same as steps S1010 to S1030 shown in FIG. 10, a detailed description thereof will be omitted. The master data communication device 800 selects one or more combined lines capable of transmitting and receiving among the first and second transmission lines 862 and 872 (S1110). The line selector 840 selects a combined line capable of transmitting and receiving by comparing the data amounts of the downlink data frame and the uplink data frame. In addition, the line selector 840 determines whether the first and second transmission lines 862 and 872 have an error, and selects a line having no error as a combined line. When the combined line is selected, the transmission time of the downlink data and the reception time of the uplink data are divided for the combined line (S1120). In operation S1130, transmission control information including identification information on the combined line and a reception time of the divided uplink data is generated.

When the transmission control information is generated, the downlink data is transmitted through the combined line, and the transmission control information is transmitted to the external communication device through the transmission control line 892 provided in the master data communication device 800 (S1140). With reference to the transmitted control information signal, the external data communication device transmits identification information and uplink data frame of the combined line. That is, the master data communication device 800 receives the identification information and the uplink data frame of the combined line (S1050). Then, the time division controller 850 divides the reception time of the uplink data for the combined line (S1160) and transmits new downlink data.

According to the data communication apparatus and method according to the present invention, when an error occurs in any one of the transmission signal line and the reception signal line of the data, it is possible to transmit and receive data with the detected signal line by detecting the signal line performing normal operation. Do it. As a result, an abnormality occurs in one signal line, and it is possible to prevent transmission and reception of data completely. In addition, when either data amount is relatively large by comparing the amount of data transmitted through the transmission signal line and the amount of data received through the reception signal line, a relatively large amount of data is transmitted using a signal line having a small data transmission amount. Can be. Therefore, the data line capable of only one-way data transmission, such as transmission or reception, enables bidirectional communication, thereby enabling efficient data transmission. In addition, the data transmission time can be reduced. In addition, data can be transmitted at high speed by using serial signal lines as data transmission and reception signal lines.

Although the present invention has been described in detail through the representative embodiments, those skilled in the art to which the present invention pertains can make various modifications without departing from the scope of the present invention with respect to the embodiments described above. Will understand. Therefore, the scope of the present invention should not be limited to the embodiments described, but should be defined by the claims below and equivalents thereof.

Claims (14)

A first transmitter connected to the first transmission line and transmitting downlink data; A second transmitter connected to a second transmission line and receiving uplink data; A line selection unit for selecting at least one of the first and the second transmission lines that can be transmitted and received; And And a time division controller for dividing a transmission time and a reception time with respect to the combined line. The method of claim 1, And the line selection unit selects the combined line by comparing data amounts of the downlink data and the uplink data. The method of claim 1, And wherein the line selection unit determines whether the first and second transmission lines have an error and selects a line in which no error occurs as the combined line. The method of claim 1, The time division controller, A transmission control information generation unit for generating transmission control information including identification information of the selected combined line and the divided reception time; And And an information adding unit for adding the generated transmission control information to the downlink data. The method of claim 1, A transmission control information generation unit for generating transmission control information including identification information of the selected combined line and the divided reception time; And And a transmission control unit for transmitting the transmission control information through a transmission control line provided separately. A first transmitter connected to the first transmission line and receiving downlink data; A second transmitter connected to a second transmission line and transmitting uplink data; And A time division controller configured to control the transmission of the uplink data according to transmission control information including identification information of the at least one selected transmission line of the first and second transmission lines capable of transmitting / receiving and a transmission time of the uplink data; And a data communication device. The method of claim 6, And the transmission control information is added to the received downlink data. The method of claim 6, And a transmission control unit for receiving the transmission control information through a separate transmission control line. A line selection step of selecting at least one combined line capable of transmitting and receiving among the first and second transmission lines; A time division control step of dividing a transmission time and a reception time for the selected combined line; And And an information transmission step of transmitting downlink data according to the identification information of the combined line and the divided reception time. The method of claim 9, In the line selection step, the combined line is selected by comparing data amounts of the downlink data and the uplink data. The method of claim 9, The line selection step is a data communication method, characterized in that for determining the error of the first and second transmission line to select a line that does not occur error as the combined line. The method of claim 9, The time division control step, An information generation step of generating transmission control information including identification information of the selected combined line and the divided reception time; And And an information adding step of adding the generated transmission control information to the downlink data. The method of claim 9, An information generation step of generating transmission control information including identification information of the selected combined line and the divided reception time; And And an information transmitting step of transmitting the transmission control information through a separate transmission control line. The method of claim 9, An information receiving step of receiving the identification information of the combined line, the reception time of the divided uplink data and the uplink data; And And a second time division control step of dividing a reception time of the uplink data with respect to the combined line.