KR100240076B1 - Method for shortening the communication time of multi functional peripheral - Google Patents

Abstract

The present disclosure relates to a method for shortening the communication time of a multifunction device in order to shorten the overall communication time by minimizing the time required for the fallback when a fallback condition occurs during facsimile communication.

In the present invention as described above, a facsimile communication is performed after a call loop is formed according to the calling tone of the transmitting side, transmitting the called station ring tone and the called station identification frame to the transmitting side, and transmitting the response signal and training data corresponding to the called station identification frame to the receiving side. A method comprising: transmitting training data to a receiving side at a modem speed set when a fallback condition occurs during facsimile communication, receiving the transmitted training data, retrieving an error rate of the training data, and responding thereto. Requesting the transmitting side for a modem speed to be transmitted through predetermined signal information; And resetting the modem speed according to the predetermined signal information requested by the receiver and retransmitting the training data to the receiver at the set modem speed. Accordingly, if a fallback condition occurs during facsimile communication, the transmitter side unilaterally By lowering the modem speed sequentially and selecting the appropriate modem speed at the receiving side without requesting a fallback, the sender selects an appropriate modem speed and reduces the time required for the fallback, thereby reducing the overall communication time.

Description

How to shorten communication time for multifunction devices

The present invention relates to a method for shortening the communication time of a multifunction device, and more particularly, according to an error occurrence rate of training data received from a transmitting side when a fallback condition occurs in a multifunction device having an independent facsimile or facsimile function. The receiver determines the appropriate modem speed and requests the sender through the called party identification frame.The sender communicates with the MFP by resetting the modem speed with the frame information of the called party identification to reduce the fallback execution time and shorten the overall communication time. It is about a shortening method.

In general, a multifunction device, as is well known, is a multifunctional terminal made of a single terminal existing in each unit such as a facsimile machine, a scanner, a printer, a copier, and the like. It refers to a Multi Functional Peripheral (MFP) having a function that is capable of being equipped with a computer-interface function.

If a fallback condition occurs during facsimile communication in a multifunction device or single device facsimile device that has such a facsimile function, the sending side sequentially reduces the modem speed from the currently set modem speed to the lowest modem speed, The fallback operation will be performed.

In other words, when a fallback condition occurs in a facsimile device or multifunction device, the sender unilaterally lowers the modem speed and transmits it to the receiver while performing the fallback operation. In this case, the fallback execution time becomes long, and as a result, the total communication time increases.

1 is a block diagram showing the configuration of a facsimile in a general multifunction device.

The facsimile system controls and processes the program according to a predetermined program. The facsimile system 100 controls the copying of the original image data and the transmission and reception of image data during the printing function of the facsimile machine. The memory unit 101 stores an operation program and a general control program, and accesses or stores original image data and received data according to program execution of the central processing unit 100, and function keys of the system can generate data. An operating panel (OPE) having a plurality of keys and having a liquid crystal display 102a capable of inputting the key data to the central processing unit 100 and displaying the display data of the central processing unit 100 when the key data is generated ( 102, a scanning unit 103 which scans the image of the document with the binarization information and provides the digital image data to the central processing unit 100; Modem 104 which is under the control of the device 100 and outputs the analog modulation output data of the central processing unit 100 and demodulates the analog receiving input to digital data, and the control of the central processing unit 100 And a communication control unit 105 for forming a call loop of a telephone line (Tip, Ring) and interfacing the side, demodulation signal of the modem 102 and the signal of the telephone line (Tip, Ring), and a central processing unit. The printer unit 106 for printing and copying the original image data read from the scanning unit 103 and the received data through the modem 102 by the control signal of 100, and the remaining amount of the original and the recording paper are sensed for central processing. The sensor unit 107 provided to the apparatus 100 and the speaker 108 which generate an alarm by the control signal of the central processing unit 106 are comprised.

In addition, FIG. 2 shows the signal flow of the T.30 command for performing the fallback based on the International Telecommunication Union (ITU) Recommendation T.30.

As described above, the performing of the fallback operation performed by the transmitting side in the made facsimile apparatus is described in detail as follows.

In addition, it is assumed that the apparatus shown in FIG. 1 is a facsimile system on the transmitting side.

First, when the user feeds a plurality of transmission documents to be sent to the document feeder, the central processing unit 100 of the transmitting side 200 performs a message transmission preparation step for preparing a facsimile message transmission.

That is, the central processing unit 100 of the transmitting side 200 transmits a calling tone (CNG: Calling Tone) indicating the start of transmission through the modem 104, the communication control unit 105, and the telephone line (Tip, Ring). To 300.

As described above, when the facsimile apparatus of the receiving side 300 connects a line by making a call from the transmitting side 200 (201), the receiving side 300 responds to the call tone (CNG), that is, it is a facsimile. Called Station Identification (CED: Called Station Identification) tone to send to the transmitting side 200 for a predetermined time (301), and also indicates the standard function of the recipient country of the International Telegraph Telephone Advisory Committee (CCITT), In other words, a receiver ID (DIS) frame for informing its own reception capability such as modem speed / compression method / resolution is transmitted to the transmitting side 200 for a predetermined time (302).

At this time, the central processing unit 100 of the transmitting side 200 checks the contents of the called station identification (DIS) frame sent from the receiving side 300 and the parameters set on the transmitting side 200 and the parameters of the receiving side 300. Compare parameters with the modem speed / compression method / resolution and set the parameters such as modem speed / compression method / resolution and transmit them to the receiver 300 disliked the response to the called party identification (DIS) frame. 202), the modem 104 and the communication control unit (TCF: Training Check) data that transmits zero data for about 1.5 seconds at a modem speed that is already set for line speeding. 105) and to the receiving side 300 through the telephone line (Tip, Ring) (203).

When the receiving side 300 checks the training (TCF) data at the modem speed (that is, the transmission speed) that is already set through the response (DCS) frame of the transmitting side 200, and an error occurs more than a certain ratio, A signal (FTT: Failure To Train) frame for requesting the modem 200 to re-adjust the modem speed is transmitted to the transmitter 200 (303).

When the central processing unit 100 of the transmitting side 200 receives the FTT frame from the receiving side 300, the modem speed is lowered by one step regardless of the error rate of the data (204), and the response (DCS) frame and training are performed. (TCF) data is retransmitted to the receiving side 300 at the first lowered modem speed (205, 206).

The receiving side 300 checks the training data again at the modem speed that has been set through the response frame of the transmitting side 200, and if the error occurs more than a certain rate, it transmits again. An FTT frame for requesting modem speed readjustment is sent to the side 200 (304).

When the transmitting side 200 receives the FTT frame from the receiving side 300 again, the modem speed is lowered by one step and set (207), and then the DCS and TCF data is transmitted again to the receiving side 300 (208). ), (209).

The DCS and TCF are gradually lowered by one step until the 305 receives a Confirmation To Receive (CFR) frame indicating that the training data has been successfully received from the receiver 300 (305). The operation of retransmitting data is repeatedly repeated (210-212).

For example, when the error rate of the training (TCF) data transmitted by the first transmission side 200 is about 20% or more, the reception side 300 readjusts the modem speed only when an error occurs unconditionally regardless of the error rate. The FTT frame for transmitting to the transmitting side (200).

The transmitter 200 lowers the modem speed by one step at the request of the receiver 300, and then transmits the response (CSS) frame and training (TCF) data back to the receiver 300 at the modem speed. The process is repeated several times, reducing the error rate of training (TCF) data to 0%.

Subsequently, the receiving side 300 checks the training (TCF) data received from the transmitting side 200, and if there is no error, the transmitting side 200 transmits a receiveable (CFR) frame indicating that the training data has been successfully received. (305).

The central processing unit 100 of the transmitting side 200 receives the facsimile image data at a preset modem speed when receiving a CFR frame indicating that the training data from the receiving side 300 has been successfully received. The original data is scanned from the scanning unit 103 and transmitted (213), and then the operation of the next message transmission step is performed.

However, when a fallback condition occurs in a conventional facsimile apparatus or a multifunction apparatus having a facsimile function, the sender has unilaterally lowered the modem speed in order to fall back.

In other words, because it performs the fallback operation sequentially from the initially set modem speed to the lowest modem speed, if the worst-case fallback condition (when the noise is very noisy on the line), the initial modem speed is set very high. If you are connected by falling back to a very low modem speed, you will have a problem that the time it takes to fall back increases and eventually the overall communication time increases.

That is, for example, if a fallback condition occurs during facsimile communication, it takes about 1.5 seconds to send a T.30 command and about 3 seconds to check the response after sending the command. Assuming that the training flow takes (DSC + TCF) send + FTT or CFR receive = (1.5 + 1.5) + 3 = 6 seconds.

If the worst-case fallback condition occurs with the modem speed set at 14400bps (bit per second), then 5 times × 6 seconds if the fallback occurred five times in the order of 14400bps → 12000bps → 9600bps → 7200bps → 4800bps → 2400bps. It takes 30 seconds to solve the problem that eventually, the overall communication time described above becomes long and the call charge increases with the increase of the communication time.

Therefore, when the fallback condition occurs, the sender does not have to unilaterally lower and adjust the modem speed, but sets the modem speed low according to the degree of error in the training data received from the receiver to shorten the fallback execution time. It is preferable to apply a method for shortening the communication time of the multifunction apparatus, which can achieve an effect equal to or higher than that of the conventional apparatus without additional parts.

Accordingly, the present invention excludes an increase in the communication time generated by performing a fallback operation by unconditionally and gradually lowering the modem speed at the transmitting side when a fallback condition occurs in the above-described conventional technology. It is an object of the present invention to provide a method for shortening the communication time of a multifunction device to set the modem speed low according to the error occurrence degree of the training data received at the time of occurrence, to reduce the fallback execution time and to shorten the overall communication time.

In another aspect of the present invention, an object of the present invention is to select and request an appropriate modem speed according to an error occurrence degree of training data of a transmitting side, so as to save a call charge due to a reduction in fallback execution time.

In another aspect of the present invention, it is an object of the training to be successful with at least one or two fallbacks even if the worst fallback condition occurs.

1 is a block diagram showing the configuration of a facsimile in a general multifunction device,

2 is a signal flow diagram for performing the fallback (Fallback) in the conventional facsimile,

3 is a signal flow diagram illustrating an embodiment of a method for shortening a communication time of a facsimile in a multifunction apparatus according to the present invention.

<Description of the code | symbol about the principal part of drawing>

100: central processing unit 101: memory unit

102: operation panel 103: scanning unit

104: modem 105: communication control unit

106: printer unit

In accordance with an aspect of the present invention, a communication time shortening method according to an aspect of the present invention includes transmitting training data to a receiver at a preset modem speed when a fallback condition occurs during facsimile communication; Receiving the transmitted training data, searching for an error rate of the training data, determining a modem speed corresponding to the training data, and requesting the transmitter through predetermined signal information; And resetting a modem speed with the information requested by the receiving side and transmitting the response frame and training data for the predetermined signal information to the receiving side with the set modem speed.

In the method for shortening the communication time of the multifunction apparatus according to the present invention, it is preferable that the predetermined signal information is a called station identification frame.

In this way, if a fallback condition occurs during facsimile communication without adding additional parts to the facsimile device, the sender does not unilaterally decrease the modem speed in order to perform fallback, but instead selects the appropriate modem speed at the receiver to request the sender. As a result, the time required for the fallback is reduced.

As a result, when a fallback condition occurs, the sender can unilaterally reduce the modem speed, so that the training can be successful even with one or two fallbacks without performing fallback, minimizing the time required for fallback and eventually reducing the overall communication time. There is an advantage that the communication fee is reduced.

And, there may be a plurality of embodiments of the present invention, the following will be described in detail with respect to the most preferred embodiment.

This preferred embodiment enables a better understanding of the objects, features and advantages of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the communication time shortening method of the multifunction apparatus according to the present invention.

In addition, the communication time shortening method of the present invention can be applied to an office automation device such as a facsimile machine or a multifunction device having a facsimile function.

In addition, the following description considers the example applied to the facsimile system which transmits image data, etc. of an original.

3 is a signal flow diagram illustrating an embodiment of a method for shortening a communication time of a facsimile in a multifunction apparatus according to the present invention.

Referring to FIG. 3 with reference to FIG. 1, in order to transmit a plurality of transmission documents, the central processing unit 100 of the transmitting side 400 transmits a transmission start ring tone (CNG) to the modem 104 and the communication control unit ( 105) and forming a call path by transmitting to the receiving side 500 through a telephone line (Tip, Ring) (401), and a response to the ring tone (CNG) of the transmitting side 400 after the call loop is formed. A step 501 of transmitting a called station call (CED) tone of the receiving side 500 as a signal for a predetermined period of time, and after receiving the called station call (CED) tone, it informs its own receiving capability such as modem speed / compression method / resolution. A step 502 of transmitting the called party identification (DIS) frame to the transmitting side 400 for a predetermined time, and the parameters of the called station identification (DIS) frame sent from the receiving side 500 and the transmitting side 400. Compare parameters of modem and set parameters such as modem speed / compression method / resolution for actual transmission. Transmit (TCF) data to the receiving side 500 at the modem speed preset for line training (Line Training) through the response (DCS) frame to the station ID signal (DIS) frame Step 402, 403, and receiving the transmitted training (TCF) data to retrieve the ratio of errors and determine the modem speed corresponding to the retrieved error information to determine the called station (DIS) Steps 503 and 504 requesting the sender 400 to dislike the frame and the parameters such as modem speed / compression method / resolution with the information requested through the called party identification (DIS) frame are reset. (404) and (405) for transmitting to the receiving side 500 via the (DCS) frame, resetting the modem speed by resetting the modem speed at the modem speed, and the training sent from the transmitting side 400. (TCF) data was retrieved and an error in the data Transmitting a receiveable (CFR) frame to the transmitting side 400 if there is no (505); and receiving a receiveable (CFR) frame from the receiving side 500, the facsimile image data with the set modem speed. 406 is transmitted to the receiving side 500 to communicate.

A preferred embodiment of the communication time shortening method of the multifunction device of the present invention thus made will be described in more detail with reference to FIG. 1.

First, when the fax system feeds originals to the document feeder in order to send a plurality of originals in the standby mode, the central processing unit 100 of the transmitting side 400 feeds the originals through the sensor unit 107. Will be detected.

As such, when a fax number is input from the operation panel 102 after the document is fed, the central processing unit 100 of the transmitting side 400 performs a message transmission preparation step for preparing a facsimile message transmission.

In other words, the central processing unit 100 of the transmitting side 400, when a fax number is input from the operation panel 102, first transmits a call tone (CNG) indicating the start of transmission to the modem 104 and the communication control unit 105; It transmits to the receiving side 500 through the telephone line (Tip, Ring).

In this way, when a call path is established from the transmitting side 500 to the receiving side 500, that is, when a telephone line is connected (401), the receiving side 500 responds to the call tone (CNG). And transmits a called station call (CED) tone to the transmitting side 400 for a predetermined time to inform that the person is a facsimile (501), and also transmits his receiving capability such as modem speed / compression method / resolution to the transmitting side 400 A called party identification (DIS) frame for transmitting a message is transmitted for a predetermined time (502).

At this time, the central processing unit 100 of the transmitting side 400 checks the contents of the called station identification (DIS) frame sent from the receiving side 500 and sets the parameters set on the transmitting side 400 and the receiving side 500. After comparing the parameters and setting the parameters such as modem speed / compression method / resolution for actual transmission, the receiver 500 dislikes them in the DCS frame, which is a response signal to the called station identification (DIS) frame of the receiver 500. (TC) and the communication control unit 105 and the telephone line (TCF) data, which transmits zero data for about 1.5 seconds at a modem speed already set for line training. Tip, Ring) is transmitted to the receiving side 500 (403).

The receiving side 500 checks the training (TCF) data at a preset modem speed through the response (DCS) frame of the transmitting side 400, and if an error more than a certain ratio occurs, the modem corresponding to the error appropriately. A speed is selected (503) and the selected modem speed information is transmitted to the transmitting side 400 disliked in the called station identification (DIS) frame for informing the transmitting side 400 of the capability of the receiving side 500 ( 504).

That is, as an example, when the error rate of the training (TCF) data sent from the transmitting side 400 is about 20% or more, the modem speed is requested to the transmitting side 400 again. The receiver 500 selects (i.e., pulls down) a modem speed that matches the error rate of the training (TCF) data so that the training can succeed in one or two poll millions without having to make multiple adjustment requests. It dislikes this to the called station identification (DIS) frame and makes a request to the transmitting side 400.

Then, the transmitting side 400 resets the modem speed with the information re-requested through the called party identification (DIS) frame sent from the receiving side 500 (404) and sets the called party ID (DIS) frame at the set modem speed. The DCS frame, which is a response signal, is transmitted to the receiving side 500, and the modem speed control data, that is, training (TCF) data for line training, is transmitted to the receiving side 500 (405).

The receiving side 500 checks the training data again at the modem speed set through the called party identification (DCS) frame sent from the transmitting side 400, and if the error occurrence rate is equal to or less than a predetermined value, that is, 0%, the training data is transmitted. A successful reception (CFR) frame is transmitted to the transmitting side 400 to receive a successful reception (505).

When the transmitting side 400 receives the Receivable (CFR) frame indicating that the training data has been successfully received from the receiving side 500, the transmitting side 400 transmits the facsimile image data at the modem speed set in step 404 (406). Continue to perform the next step.

On the other hand, as a comparative example, when the fallback condition occurs during the conventional communication, that is, in the case of facsimile communication, the present invention is different from the method of training the sender at the receiving end, unlike the sender performing the fallback by unconditionally lowering the modem speed step by step. It can be seen that the modem selects a modem speed corresponding to the error rate of the data and requests the sender, and the sender resets the modem speed with the selected information and transmits it to the receiver.

As a result, according to the present invention, even if the worst fallback condition occurs, the training can be successful only by one or two fallbacks, so that the time required for fallback is reduced to a minimum.

As described above, in the present embodiment, when a fallback condition occurs without adding a separate component to the multifunction device or the facsimile system, the sender determines the appropriate modem speed at the receiving end and sends the request to the transmitting side without lowering the modem speed unilaterally. It is possible to reduce the time required for the communication, and consequently, the overall communication time.

In addition, while specific embodiments of the present invention have been described and illustrated above, it is obvious that the present invention may be variously modified and implemented by those skilled in the art.

Such modified embodiments should not be individually understood from the technical spirit or the prospect of the present invention, and such modified embodiments should fall within the appended claims of the present invention.

It is clear from the above description that according to the method of shortening the communication time of the multifunction apparatus of the present invention, the caller determines the modem speed corresponding to the error of the training data received at the fallback condition, and requests the sender to determine the corresponding modem speed. This reduces the time required for communication, and consequently shortens the overall communication time, saving communication costs.

Claims (2)

In the facsimile communication method of communicating a called station ring tone and a called station identification signal frame to the transmitting side after forming a call loop according to the calling tone of the transmitting side, and transmitting a response signal and training data for the called station identification frame to the receiving side. : Transmitting the training data to a receiving side at a preset modem speed when a fallback condition occurs during the facsimile communication; Receiving the training data, searching for an error rate, selecting a modem speed corresponding thereto, and requesting the transmitting side to dislike predetermined signal information; And Resetting the modem speed with the predetermined signal information requested by the receiving side, and resending the response signal and the training data to the receiving side at the set modem speed. How to reduce communication time of a multifunction device. The method of claim 1, And the predetermined signal information is a destination station identification frame.

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