KR970003378B1 - Error page retransmission confirmming method of facsimile - Google Patents

Abstract

The method of confirming an error message retransmission of a facsimile machine includes the steps of: requesting a voice communication by transmitting a user call signal (PRI-Q) after completing a transmission up to a final page to a receiving party, if a ready for a receiving signal (RTN) is transmitted from the receiving party due to a dissipation of data during plural sheets of documents are transmitted to the receiving party in communication sequence; receiving the user call signal from the transmitting party to transmit message of the page corresponding to the dissipated data in a voice in response of the received signal; and confirming a reception sate of the page transmitted by the voice communication with the receiving party to retransmit the corresponding page.

Description

How to check the fax's error page retransmission

1 is an explanatory diagram of a conventional fax transmission and reception method.

2 is a configuration diagram of an error page retransmission confirmation system of the present invention.

3 is an error page retransmission confirmation signal flow diagram of a fax according to FIG.

* Explanation of symbols for main parts of the drawings

1: system control means 2: reading means

3: memory means 4: modem

5: key input means

The present invention relates to the error page retransmission confirmation of the facsimile, and in particular, the data loss after the user directly confirms the loss of data caused by bad conditions or other noise of the communication line during the data transmission without the need for a separate call request for retransmission The present invention relates to an error page retransmission confirmation method of a facsimile that determines whether to retransmit the corresponding page to be retransmitted.

In general, when sending a document using a facsimile device, the transmission fax and the reception fax communicate with each other according to the recommended communication standards worldwide.

In the conventional fax transmission and reception method, as shown in FIG. 1 of the accompanying drawings, a message is prepared by transmitting and receiving a call tone from a transmitting side and a response signal from a receiving side in response to the transmission of a plurality of transmission documents. A message transmission step of transmitting and receiving a fax message by transmitting and receiving a message transmission preparation step, a receiving station identification signal, a message receiving signal, and a transmission rate control signal, respectively, after completion of the message transmission preparation step; And a message transmission decision step of determining whether or not the transmission of the message is completed.

As described above, in the conventional fax message transmitting / receiving method, the transmitting side first performs a message transmission preparation step for preparing a fax message transmission while setting a plurality of transmission documents to be transmitted by a user in a transmission unit (not shown).

That is, a call tone (CNG: Calling Tone) indicating the start of transmission is transmitted to the receiver.

The receiving side detects whether the calling tone (CNG) has been transmitted from the transmitting side. If the calling tone (CNG) has not been transmitted from the transmitting side for a predetermined time, the receiver disconnects the DCN and stops the transmission. If the CNG is transmitted within a certain time, the receiver sends a response signal (CED: Called Station Identification) to the sender for a predetermined time, and the called party identification signal indicating the standard function of the recipient country of the International Telegraph Telephone Advisory Committee (CCITT). (DIS: Digital Identification Signal) is transmitted for a predetermined time, the time is searched, and the transmission is stopped when the transmission time of the called station identification signal (DIS) elapses.

If the predetermined time has not elapsed, the transmitting side transmits a response signal (CCS: Digital Command signal) for the called station identification signal DIS to the receiving side and transmits a transmission speed control signal (TCF) for a predetermined time. The receiver transmits a message acknowledgment signal (CFR: Confirmation To Receive) to the transmitter in response.

As a result, the sender transmits the first page to the receiver.

When the original is transmitted and the user changes the resolution during the transmission of the first original from the sender, a plurality of sheets are sent before the start of transmission of the second original, i.e. after the completion of the first original, transmission of one page is completed and there is a next page. When the MPS (Multi Page Signal) is transmitted to the receiver, the receiver receives the first page and then retraining the signal to cause the transmitter to readjust the communication speed if a part of the data of the received page is lost. Negative) will be sent to the sender.

Therefore, in order to readjust the communication speed at the transmitting side, retry from the initial process of preparing the message transmission step, transmit the response signal DCS to the retraining negative signal RTN at the receiving side to the receiving side, and adjust the transmission speed. The signal TCF is transmitted to the receiving side for a predetermined time.

In response, the receiving side transmits the message receiving signal CFR to the transmitting side, and the transmitting side transmits the second and third pages to the receiving side through the message transmitting step.

In this way, when the transmission is completed up to the third original to be transmitted, the sender transmits an end of procedure (EOP: End Of Procdure) to the receiver through a message transmission determination step.

When the receiving side retrieves the transmission completion signal (EOP) from the transmitting side and sends the message confirmation signal (MCF) to the transmitting side in response to the response, the transmitting side turns off the connector (DCN) to transmit the response. You are done.

However, such a conventional facsimile transmission / reception scheme is based on the loss of transmitted data when the sending fax machine receives a retraining negative (RTN) or retraining positive (RTP) signal from the receiving fax machine after data transmission. Regardless of whether the message is ready to be sent, the message is sent, or the message is decided to continue.

Therefore, when the important data portion of the corresponding page that has transmitted the retraining positive signal or the retraining negative signal is lost, the transmitter and receiver have to retransmit after confirmation.

Accordingly, an object of the present invention is to determine the degree of data loss that occurs during data transmission, and if the data loss is large, the facsimile machine continuously retransmits the corresponding page including the lost data without requiring a separate call for retransmission. It provides an error page retransmission confirmation method of.

Such a method for achieving the object of the present invention is to transmit the reception possible signal (RTN) from the receiving side due to the loss of data during transmission of a plurality of manuscripts to the receiving side by the communication procedure is transmitted to the last page to the receiving side Requesting a voice call by transmitting a user call signal (PRI-Q) after the completion of the process, receiving a user call signal from the transmitter, and transmitting a corresponding page of data lost in response to the voice call; This is achieved by retransmitting the answer page by checking the reception status of the page transmitted by the voice call with the receiving side. Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

2 is a configuration diagram of an error page retransmission confirmation system of the present invention. As shown in FIG. 2, an image signal of a transmission document input by driving a transmission motor (not shown) is read and converted into an electrical signal by photoelectric conversion. A facsimile according to the reading means (2) for converting and converting the converted electrical signal into image data and outputting the image data read out from the reading means (2) and the key signal input from the key input means (5). System control means (1) for controlling the overall system operation of the memory; and memory means (3) for storing black and white image data output from the read means (2) by the control signal of the system control means (1); Drive by the control signal of the system control means (1) to sequentially modulate the image data stored in the memory means (3) to transmit to the transmission lines (L1, L2) and received And a modem 4 which demodulates data and inputs it to the system control means 1.

FIG. 3 is a flow chart of an error page retransmission confirmation signal of a fax according to FIG. 2. As shown in FIG. 3, a transmission start ring tone from a transmitting side for transmitting a plurality of transmission originals and a response from a receiving side responding thereto are shown. A message transmission preparation step of preparing a message transmission by transmitting and receiving a signal, and transmitting and receiving a fax message in earnest by transmitting and receiving a reception station identification signal, a message reception signal, and a transmission speed control signal, respectively, after the completion of the message transmission preparation step. An error page checking step of requesting a voice call and confirming an error state of a page transmitted by the voice call by transmitting a user call signal to a receiving side after the last message is transmitted through the message transmitting step; Resend error page to resend only page corresponding to error when page occurs System, whether a message sent to determine whether the continuous transmission and the transmission completion of the facsimile message of the message comprises a decision step.

If the meaning of the retraining negative (RTN) and the retraining positive signal (RTP) is defined above, the retraining negative signal (RTN) indicates that the previous message has not been satisfactorily received.

However, subsequent training may be possible if training or phase synchronization is resent.

And the retraining positive signal (RTP) indicates that a complete message has been received, and that an additional message may follow after the training or retransmission of phase synchronization and message receivable signal (CFR).

The operation and effect of the present invention configured as described above will be described in detail with reference to FIGS. 2 and 3.

When the user sets a plurality of transmission originals to be transmitted to the transmission means and presses the transmission start key of the key input means 5 after the dialing is completed, the transmission motor is driven by the control signal of the system control means 1 to set. A plurality of transmitted originals are imported.

At this time, the reading means 2 reads the image signal of the transmission document received by the transmission motor, converts it into an electrical signal by photoelectric conversion, and processes the converted electrical signal into image data to the memory means 3. It is stored and input to the system control means (1).

The system control means (1) modulates the image data stored in the memory means (3) through the modem (4) and then transmits it to the receiver through transmission lines (L1) and (L2). As shown in the figure, a call tone (CNG) indicating the start of transmission is transmitted to the receiver, and the receiver detects whether the call tone (CNG) has been transmitted from the sender, and if the call tone (CNG) has not been transmitted from the transmitter for a predetermined time, the connector (DCN) is turned off to stop the transmission, and if the call tone (CNG) is transmitted from the sender within a certain time, the receiver transmits a response signal (CED) to the sender for a predetermined time and consults the international telegraph telephone. The transmission time of the called party identification signal DIS is reduced by searching for the time while transmitting the called party identification signal DIS representing the standard function of the called station of the Commission for a predetermined time. If the transfer is interrupted.

If the predetermined time has not elapsed, the transmitting side transmits the response signal DCS to the called station identification signal DIS to the receiving side, and transmits the transmission speed control signal TCF to the receiving side for a predetermined time. In response, the receiving side transmits a message receiving possible signal (CFR) to the transmitting side.

Accordingly, the system control means 1 on the transmitting side receives a plurality of sets of transmitted originals into a single document by continuous feeding, and continuously receives the single documented image data through the modem 4. Will be sent to the side.

Here, as shown in FIG. 3, the third page transmission is a normal communication procedure.

When the original is transmitted and the user changes the resolution during the transmission of the first original on the sender side, the first page is transmitted before starting the transmission of the second original, that is, after the transmission of the first original is completed. When every signal (MPS) is transmitted to the receiver, the receiver sends a retraining negative signal (RTN) to the transmitter so that the transmitter can readjust the communication speed when a part of data of the received page is lost after receiving the first page. Done.

Therefore, in order to re-determine the communication speed at the transmitter, retry from the initial process of preparing the message transmission step, that is, transmit the response signal DCS to the receiver for retraining negative signal RTN at the receiver, The control signal TCF is transmitted to the receiver for a predetermined time.

In response, the receiving side transmits the message receiving signal CFR to the transmitting side, and the transmitting side transmits the second and third pages to the receiving side through the message transmitting step.

As such, when the second and third pages are transmitted without error and the transmission is completed in the normal communication procedure, the sender loses some data of the first page by receiving the retraining negative signal (RTN) after transmitting the first page through the error page checking step. Since it is known that the user call signal (PRI-Q) is transmitted to the receiver to make a voice call request.

The receiving end user receives the handset of the fax machine and transmits a process interrupt negative (PIN) or process interrupt positive (PIP) signal in response thereto.

The sender receives the PIN or PIP signal from the receiver and responds by picking up the handset of the fax machine.

As such, when the sender / receiver of the transmitting / receiving side performs a telephone call to check the reception status of the first page, and if it is determined that retransmission is necessary, the call tone (CNG) is performed as described above through the error page retransmission step. After receiving and transmitting the response signal (CED), the called party identification signal (DIS), the response signal (DCS), the transmission rate control signal (TCF), and the message reception enable signal (CFR) to the receiver, Resend the first page.

Thereafter, when the transmission is completed, the transmitting side transmits a transmission completion signal (EOP) to the receiving side through the determining step whether the message is transmitted.

When the receiving side retrieves the transmission completion signal EOP from the transmitting side and transmits the message acknowledgment signal MCF to the transmitting side in response, the transmitting side turns off the connector DCN to complete the transmission and reception. .

As described in detail above, the present invention attempts to make a call by using a signal that can be received according to a normal communication procedure, so that the user directly determines the degree of lost data and performs subsequent actions as a continuous operation. When the loss of data is large, it is possible to continuously resend the corresponding page including the lost data without requiring a separate call for retransmission.

Claims (1)

Receive Received Signal (RTN) from the receiver due to loss of data during transmission of multiple pages to the receiver by the communication procedure.If received, the user page signal (PRI-Q) is completed after completion of transmission to the last page. Transmitting a request for a voice call, receiving a user call signal from the sender, and transmitting a corresponding page of data lost in response to the voice call; A method of confirming an error page retransmission of a facsimile, characterized in that it comprises the step of retransmitting the corresponding page by checking the reception status.