KR20020063366A - An apparatus for data transmitting/receiving and method of controlling the apparatus and facsimile-apparatus - Google Patents

Abstract

PURPOSE: A device for transmitting and receiving data and a method for controlling the same, and a facsimile applying the same thereto are provided to enable a user to select an automatic repeat mode setting a minimum transmission rate, so as to prevent data from being transmitted in a low transmission rate and reduce a data transmission time. CONSTITUTION: A transmitting/receiving unit(15) interfaces with a communication network(10), and modulates data to be transmitted and demodulates received data. A key input unit(16) arranges keys therein and enables a user to select an automatic repeat mode, to select a minimum data transmission rate and make data transmitted over the selected minimum data transmission rate. And a controller(19), if the automatic repeat mode is set, gradually lowers a data transmission rate according to a set descent pattern whenever a transmission error rate reaches a set value, while transmitting transmission object data to a receiving apparatus of the other party. If the lowered data transmission rate reaches the minimum data transmission rate selected through the key input unit, the controller disconnects with the receiving apparatus of the other party then reconnects with the receiving apparatus, to transmit the transmission object data through the transmitting/receiving unit.

Description

An apparatus for data transmitting / receiving and method of controlling the apparatus and facsimile-apparatus}

The present invention relates to a data transmission / reception apparatus, a control method thereof, and a facsimile apparatus employing the same.

In general, a transceiving device such as a facsimile machine is a device that can transmit and receive document or image information.As a basic operation, the facsimile of the calling station converts the data of the document or image into an electrical signal and transmits it, Receives an electrical signal and restores it.

Such a facsimile may automatically fallback the data rate based on an error value caused by a change in the performance of a relative facsimile or a PSTN line condition. Here, the fallback means re-determining the data transmission rate after communicating unit data of a predetermined size due to a data transmission rate error during actual data transmission.

On the other hand, the facsimile now falls back to 2400 bps, which is the slowest transmission rate of the communication model, and even at this rate, the transmission network will be disconnected if an error occurs.

According to the conventional transmission method as described above, for example, the maximum transmission speed of the currently used facsimile modem is 33600bps, but in the worst case, the data may be transmitted by falling back to the 2400bps, in which case the data transmission may be successful but normal. There is a problem that takes about 14 times the transmission speed compared to the case.

In particular, in the case of the recent transmission of color manuscripts or a large amount of data, the transmission time is long, and there is a problem that the usage efficiency of the PSTN network fee and the facsimile are substantially reduced.

In case of overseas communication, it uses a lot of functions such as timed transmission, but if the fax is running for a long time at nobody's night, it will receive the documents to be received at that time than the usage fee. In some cases, the modem may not be able to function normally.

The present invention has been made to solve the above problems, and an object thereof is to provide an improved data transmission / reception device, a method of controlling the same, and a facsimile device to which the data transmission efficiency is improved.

1 is a block diagram showing an internal configuration of a facsimile apparatus to which a data transmission apparatus according to an embodiment of the present invention is applied.

2 is a flowchart illustrating a data transmission device control method according to an embodiment of the present invention.

<Description of Symbols for Major Parts of Drawings>

10. Public line network 11. Reader

13. Printing part 15. Sending / receiving part

16. Key input 17. Memory

19. Control part

A data transmitting and receiving apparatus according to the present invention for achieving the above object, in the data transmitting and receiving apparatus for transmitting and receiving data through a communication network, interfacing with the communication network, performing modulation of the data to be transmitted and demodulation of the received data A transmitter / receiver; A key input unit provided with a key for allowing a user to select an automatic repetition mode for selecting a lowest data rate and performing data transmission above a selected minimum data rate; When the automatic repeat mode is set, whenever the transmission error rate reaches the set value while transmitting data to the counterpart receiver, the data rate is gradually lowered according to the set falling pattern, but the lowered data rate is increased in the key input unit. And a control unit which disconnects from the counterpart receiver when the selected lowest data rate is reached and performs reconnection with the counterpart receiver so that the data to be transmitted is transmitted through the transmitter / receiver.

In addition, the data transmission / reception apparatus control method according to the present invention for achieving the above object, in the control method of the data transmission / reception apparatus for transmitting / receiving data through a communication network, a. Accessing only the receiver to be transmitted through the communication; I. Transmitting data to be transmitted according to a transmission rate determined by the connected receiver; All. Calculating a data transmission error rate to the counter receiver; la. Whenever the calculated error rate reaches a set value, lowering the data rate to the counterpart receiver to a predetermined value according to the set falling pattern; hemp. Determining whether the lowered data rate reaches a set minimum data rate; bar. If the data rate lowered in the step e has reached the lowest data rate, disconnecting from the other receiver; four. And repeating at least one or more steps from the temporary step to the residual data to be transmitted.

In addition, a facsimile apparatus for achieving the above object includes a reading unit for reading an original to be transmitted, and a facsimile apparatus including a transmitting / receiving unit which modulates transmission data read by the reading unit and interfaces with a public line network. A key input unit comprising: a key input unit provided with a key for allowing a user to select an automatic repetition mode for selecting a lowest data rate and performing data transmission at a selected minimum data rate; When the automatic repeat mode is set, whenever the transmission error rate reaches the set value while transmitting data to the counterpart receiver, the data rate is gradually lowered according to the set falling pattern, but the lowered data rate is increased in the key input unit. And a controller for disconnecting from the counterpart receiver and reconnecting with the counterpart receiver when the selected lowest data rate is reached, and processing the target data to be transmitted through the transmitter / receiver.

Hereinafter, a data transmission / reception apparatus, a control method thereof, and a facsimile apparatus to which the data is applied will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating an internal configuration of a facsimile apparatus to which a data transmission / reception apparatus according to an embodiment of the present invention is applied. Referring to the drawings, the facsimile apparatus interfaces with a communication unit such as a reading unit 11 for reading data to be transmitted, a printing unit 13 for printing the received data, and a public network (PSTN) 10, And a transmitter / receiver 15 for transmitting and receiving, a key input unit 16 for inputting a commercial command, a memory 17, and a controller 19.

The reading unit 11 reads data to be transmitted, that is, an original. Here, several manuscripts are read in sequence and imaged. The driving of the reading unit 11 is controlled by the control unit 19.

The printing unit 13 may be provided inside the apparatus, or may be provided as a separate printer through a network. That is, the conventional facsimile apparatus is provided with a printing unit therein, but since a separate printing unit 13 is not provided in the wireless data transceiver, etc., data is transmitted to a printing-only device such as a laser printer or an inkjet printer for printing by networking. Done. This, the printing unit 13 is to print the received data as applied to the facsimile apparatus as described herein. The printing operation in this printing section 13 is controlled by the control section 19.

The transmitting / receiving unit 15 includes a modem 15a for processing data for transmitting / receiving data and a line interface unit (LIU) 15b for interfacing with the public circuit network 10. It is provided. The modem 15a modulates the data to be transmitted and demodulates the received data. The line interface unit 15b is for interfacing data transmission and reception between the modem 15a and the counterpart receiver.

In addition, the transmitter / receiver 15, that is, the modem 15a transmits data at a predetermined data rate, and is controlled by the controller 19 according to the performance or line conditions of the other receiver to control the data rate to a predetermined falling pattern. Therefore, automatic fallback is performed to perform data transmission. When the transmitter / receiver 15 transmits data to the counterpart receiver at a predetermined data rate, the counterpart receiver determines whether data is normally received and transmits information on a transmission error rate to the transmitter / receiver 15. Therefore, the transmission / reception unit 15 can check the transmission status based on the received transmission error rate.

The key input unit 16 is for interfacing between the user and the control unit 19. The key input unit 16 is provided with a mode selection key 16a through which a user can select an automatic repetition mode for selecting the lowest data transmission and performing data transmission at a selected minimum data transmission rate or more. Accordingly, the user can select the auto repeat mode through the mode selection key 16a, and can also input additional commands such as the number of times of the auto repeat mode.

In this way, the setting value for the automatic repeat mode input through the key input unit 16, that is, the setting value such as the set minimum data transfer rate and the number of repetitions, etc., is temporarily stored in the memory 17. In addition, the memory 17 stores data to be transmitted and received data, and a system program for transmitting / receiving data.

When the control unit 19 is set to the automatic repeat mode through the key input unit 16, each time the transmission error rate reaches the set value while transmitting the transmission target data to the counter receiver, the data transmission rate is set according to the set down pattern. Gradually descend. In addition, the controller 19 controls the transmitter / receiver 15 to disconnect from the counterpart receiver when the lowered data rate reaches the lowest data rate input through the key input unit 16. Subsequently, the control unit 19 performs reconnection with the counterpart receiver to process the data to be transmitted through the transmitting / receiving unit 15, preferably from the remaining data. In this case, the controller 19 reconnects and attempts a data rate from the highest rate of the modem 15a upon retransmission.

In addition, the falling pattern may be set to be gradually lowered at a predetermined interval between the highest and lowest values according to the performance of the modem 15a. For example, the falling pattern has a pattern such as 33600bps → 31200bps → 28800bps → 26400bps → 19200bps → 16800bps → 14400bps → 12000bps → 9600bps → 7200bps → 4800bps → 2400bps.

Hereinafter, a control method of a data transmission / reception apparatus, that is, a facsimile apparatus having the above configuration will be described with reference to FIGS. 1 and 2.

Herein, the case where the automatic repeat mode is set through the key input unit 16 will be described in detail. When the document is set in the facsimile apparatus and the fax number of the counterpart receiver is input while the automatic repeat mode is set, the control unit 19 finds the fax number of the input counterpart machine and the counterpart through the line interface unit 16b. Connect to the receiver (S10). After being connected to the counterpart receiver, the controller 19 determines the transmission rate (S11). The transmission rate determined in step S11 is determined to be the highest transmission rate that the modem 15a has. Subsequently, the control unit 19 transmits the data read by the reading unit 11 to the counterpart receiver through the transmission / reception unit 15 according to the determined transmission rate (S12). During the step S12, the control unit 19 receives and calculates a transmission error rate transmitted from the counterpart receiver (S13). Then, the controller 19 determines whether the calculated error rate is greater than or equal to the reference value (S14). If the error rate is greater than or equal to the reference value in step S14, the transmission rate is lowered according to the preset fall pattern to determine it (S15). Then, the controller 19 determines whether the transmission rate determined in the step S15 is greater than the lowest data rate input according to the automatic repetition mode (S16). When the lowered and determined transmission rate is greater than the lowest data rate, data is transmitted while repeating the step S15 to step S15.

On the other hand, during the process of repeating the steps S12 to S16 several times, if the transmission rate determined by the falling pattern in the step S15 is less than the lowest data rate, the control unit 19 is a transmission / reception unit ( 15), the connection with the external device is disconnected (S17). That is, for example, when the set lowest data rate is 14400bps, if the data rate determined by the falling pattern in step S15 is 14400bps, the connection with the other receiver is disconnected.

After the connection with the counterpart receiver is disconnected as described above, it is reconnected with the counterpart receiver (S10). Then, the transmission rate is determined again (S10). At this time, after disconnecting, the transmission rate determined in the step S10 is determined as the highest transmission rate that can be processed by the modem 15a as described above. Then, after the step S12, it is repeatedly performed as described above. However, after the steps S17, S10, and S11 are sequentially performed, the data to be retransmitted is transmitted from the remaining data. That is, when only 20 pages of originals are transmitted, and only 10 pages are transmitted and step S17 is performed, data transmitted by reconnecting is transmitted from the 11th page.

As described above, according to the present invention, since the user can select the automatic repeat mode in which the lowest transmission rate is set, data transmission time can be reduced by preventing data from being transmitted at a low transmission rate. As a result, the fee for using the public line network can be reduced, and the use efficiency of the fax can be improved.

According to the data transmission / reception apparatus according to the present invention as described above, a control method thereof, and a facsimile apparatus to which the same is applied, when the transmission rate drops to a predetermined minimum transmission rate, the connection with the other receiver is disconnected and the residual data is again reached at the highest transmission rate. Will be resent. Therefore, unlike the related art, it is possible to prevent the data from being transmitted for a long time at a low data rate and to increase the use efficiency of the fax by shortening the transmission time of the data through retransmission.

In addition, by increasing the data transmission efficiency, the connection time with the counterpart receiver can be shortened, thereby reducing the network fee.

Claims (8)

In the data transmission and reception device for transmitting and receiving data through a communication network, A transmitting / receiving unit which interfaces with the communication network and performs modulation of data to be transmitted and demodulation of received data; A key input unit provided with a key for allowing a user to select an automatic repetition mode for selecting a lowest data rate and performing data transmission over a selected minimum data rate; When the automatic repeat mode is set, whenever the transmission error rate reaches the set value while transmitting data to the counterpart receiver, the data rate is gradually lowered according to the set falling pattern, but the lowered data rate is increased in the key input unit. And a control unit which disconnects from the other receiver and reconnects with the other receiver when the selected lowest data rate is reached, and processes the transmission target data to be transmitted through the transmitting / receiving unit. Device. The data transmitting / receiving device of claim 1, wherein the control unit controls to transmit data at a maximum data rate when reconnecting to the receiver to transmit data to be transmitted. The method according to claim 1 or 2, And the control unit reconnects to the receiver to control retransmission of data from residual data. In a control method of a data transmission / reception apparatus for transmitting / receiving data through a communication network, end. Accessing only the receiver to be transmitted through the communication; I. Transmitting data to be transmitted according to a transmission rate determined by the connected receiver; All. Calculating a data transmission error rate to the counter receiver; la. Whenever the calculated error rate reaches a set value, lowering the data rate to the counterpart receiver to a predetermined value according to the set falling pattern; hemp. Determining whether the lowered data rate reaches a set minimum data rate; bar. If the data rate lowered in the step e has reached the lowest data rate, disconnecting from the other receiver; four. And repeating the at least one to at least one or more times with respect to the remaining transmission target data. 5. The control method according to claim 4, wherein the data rate determined in step (b) is the maximum possible data rate. A facsimile apparatus comprising a reading unit for reading an original to be transmitted, and a transmitting / receiving unit which modulates transmission data read by the reading unit and interfaces with a public line network. A key input unit provided with a key for allowing a user to select an automatic repetition mode for selecting a lowest data rate and performing data transmission at a selected minimum data rate; When the automatic repeat mode is set, whenever the transmission error rate reaches the set value while transmitting data to the counterpart receiver, the data rate is gradually lowered according to the set falling pattern, but the lowered data rate is increased in the key input unit. And a controller for disconnecting from the other receiver and reconnecting with the other receiver when the selected lowest data rate is reached, and processing the transmission target data to be transmitted through the transmitting / receiving unit. The method of claim 6, wherein the transmitting / receiving unit, A modem for modulating the data to be transmitted and demodulating the received data; And a line interface unit for interfacing the modem with the public line network. The method according to claim 6 or 7, And a memory for storing the system program, data for transmission / reception and setting values input through the key input unit.