JP2675598B2 - Communication device - Google Patents

Description

The present invention relates to an improvement of a communication device such as a facsimile,
More specifically, the present invention relates to a communication device which is capable of reliably sending a document even when an abnormality occurs in the communication line and being able to deal with the already sent document for the convenience of the recipient.

(Prior art)

Generally, in a communication device such as a facsimile, communication data is transmitted and received using a public telephone line for the purpose of voice communication.

The procedure is that a transmitting station calls a receiving station according to a predetermined rule according to a predetermined sequence of manual or specified time transmission, and after performing a predetermined step 8 shown in FIG. 6, a training signal 9 is transmitted from the transmitting station. The data is sent to the receiving station and the communication data 10 such as a document is transmitted.

[Problems to be solved by the invention]

In general, since the public telephone line is intended for voice communication as described above, the stability of the communication line is not good, it not only adversely affects the transmission quality, but also the disturbance on the line side due to disturbance such as noise. The line may be suddenly disconnected due to the cause.

In this case, as a method for repairing the line again, a method of directly retransmitting the communication data in the state before the line was disconnected, or a method recommended by the 1988 CCITT general meeting is recommended.
There is CM (Error Retransmission Method).

In this case, since the call is not recalled, the communication data may not be retransmitted, or the connection of the communication data may be unclear even if the communication data is retransmitted.

This situation occurs more frequently in overseas communications, where communication conditions are worse than in Japan, and especially when automatically transmitted during nighttime designated transmission, which is commonly used in overseas communications. Occurrence of a defect was sometimes discovered after a long time.

In this way, if the line is disconnected due to the state of communication,
Even if the sending side tries to repair the line, it is extremely difficult to repair it by using the bad line, but if the sending side disconnects the line once and then calls again, another line will be used. I often experience normal connections.

Also, since the disconnection of the line is discovered at the time when one manuscript has been read, the transmission side sees that the manuscript has been sent, but the next manuscript will be sent next. In many cases, the receiving side does not know which document the succeeding document is connected to, or whether it is the first page, and is often confused.

Therefore, the present invention solves the above-mentioned problems of the prior art by making use of the above experience to recall when the line is disconnected, and to allow the receiver to know the correspondence between the already sent original and the retransmitted original. The purpose of the present invention is to provide a communication device that can do the same.

[Means for solving the problem]

In order to achieve the above object, the first invention is a document reading unit for reading a document to obtain communication data, a communication data memory for storing the communication data, and a communication control signal for each page of the document, Communication control means for confirming the response signal of the other party and performing communication control, and disconnecting the communication line if the response signal of the other party cannot be decoded normally when the communication control signal is transmitted by the communication control means. And a call control data storage unit that stores call control data including a call connection partner selection signal of a partner communication device that communicates, the communication data of the first page is stored. A data storage unit having a first page communication data storage area and a current page communication data storage area in which communication data of the original page currently being sent is updated and stored; When the line is disconnected by the disconnecting means, a recalling means for recalling based on the stored data of the call control data storing means, and a communication stored by the data storing means following the recalling by the recalling means It is configured as a communication device characterized in that it is provided with a first continuous transmission communication means for retransmitting data and continuing the transmission of the remaining unsent originals.

In addition, the first page of the document to be sent at the time of re-sending only needs to know the correspondence with the already-sent original, and therefore, the minimum decodable data may be sent. Therefore, as a second invention for reducing the communication data amount of the first page and shortening the communication time, the first continuous transmission communication means is provided in the first page communication data storage area of the data storage means. A communication device in which a part of the communication data stored in and the communication data stored in the current page communication data storage area are retransmitted and the second uninterrupted transmission communication means for continuing the transmission of the remaining unsent originals is replaced. Will be provided.

[Action]

When the communication device according to the first aspect of the invention configured as described above is used, the communication data of the first page and the communication data of the original page currently being sent are stored in the communication data memory by the data storage means. Therefore, when the line is disconnected by the line disconnecting means, the re-initiating means re-initiates the call based on the data stored in the call control data storage means, and following the re-initiating call, the first continuous transmission communication means As a result, it is possible to reliably retransmit the communication data for the last one page accompanied by the communication data for the first page of the document stored by the data storage means, and to continue the transmission of the remaining untransmitted documents. it can.

Therefore, by re-sending the first page of the original, the connection between the sent original and the unsent original becomes clear.

Further, since the communication data memory is updated and stored, and unnecessary page data does not need to be stored, the memory capacity can be reduced.

Further, as in the second aspect of the invention, instead of the first continuous transmission communication means, 1 of the communication data stored in the first page communication data storage area stored by the data storage means
By using the second continuous transmission communication means for retransmitting the communication data stored in the partial and current page communication data storage areas and continuing the transmission of the remaining unsent originals,
It is possible to reduce the amount of communication data on the first page, which simply indicates the connection of the documents before and after the line disconnection. Therefore, the communication time is further shortened.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. The following embodiment is an example embodying the present invention, and does not limit the technical scope of the present invention.

FIG. 1 is a control block diagram of a communication device according to an embodiment of the present invention, FIG. 2 is a flowchart showing one processing procedure in the communication device, and FIG. 3 is an example of the communication device data storage means. Memory area display schematic diagram, FIG. 4 is a memory area display schematic diagram showing another example of the data storage means, FIG. 5 is a schematic diagram showing an example of communication data of the first page, FIG.
The figure is a time chart for explaining the communication procedure.

In FIG. 1, a communication device A such as a facsimile machine reads image information of a document set on the communication device A by a reading unit 6 and uses it as communication data in a communication data memory 2
Memorize and accumulate in. Stored communication data, by a command from the communication control unit 1, the modem 4 and performs modulation and demodulation of the communication data is sent to the line 5 _a via the network controller 5 for controlling the network.

The operation display unit 3 includes a keyboard (not shown) for performing the above operation and a display unit for displaying the operation state.

The recording unit 7 prints out the communication data received via the modem 4 and the network controller 5 as image information.

The transmission procedure is the same as in the conventional method, and the transmission station calls the reception station according to a predetermined rule by a predetermined sequence such as manual transmission or designated time transmission, and a predetermined procedure 8 and training signal 9 shown in FIG. Then, the communication data 10 is sequentially sent out. Communication data 10 sent in the procedure 8
Contains a response from the receiving side indicating that the response signal has been normally received. In the present invention, when this response signal cannot be decoded normally, the line is disconnected as a transmission error.

With reference to FIG. 2, an example of the communication processing procedure of the communication apparatus A according to the embodiment of the present invention will be described in the order of steps S1, S2 ,.

The transmitting station makes a call to the receiving station based on a predetermined rule by a predetermined sequence of manual transmission or designated time transmission (S1).

The predetermined communication means 8 and the training signal 9 are sent (S2), the communication data of the first page of the original shown in FIG. 3 (a) is stored in the communication data memory, and the same communication data is sent (S3a). ).

FIG. 3A is a conceptual diagram of a state in which the communication data of the first page is stored at the beginning of the communication data memory.

If the document is not the last page, that is, if the document detection switch (not shown) detects that a document following the document exists (S4), the communication control signal MPS is sent (S5).

Confirm the other party's response signal to this communication control signal MPS, and if there is a response, perform the prescribed communication procedure (S
7) Then, the process returns to step S3a again, and the communication data of the original on the second page is processed. At this time, the communication data memory is rewritten as shown in FIG. 3B, and the communication data of the first page and the second page is held. Next, when returning to step S3a again, the communication data of the second page is updated and the communication data of the third page is stored. Below, in addition to the communication data on page 1, the communication data on page n is the third
Stored as shown in Figure (c), until the final page
The processing of S3a to S7 is repeated. A means for realizing the function of storing the first page in this communication data memory and further updating and storing the second and subsequent pages constitutes an example of the data storage means. Then, if it is the last page in step S4, the process proceeds to step S8, and the procedure end signal EOP is transmitted (S8).

Confirm the other party's response signal to the procedure end signal EOP, and if there is a response (S9), a predetermined communication procedure (S10)
Then, the line is disconnected and the transmission ends (S11).

Next, a case will be described in which the response signal of the other party cannot be normally decoded due to some abnormality in the communication line or the like.

In this case, the process moves from step S6 or S9 to step S12, and the communication line is disconnected (S12).

The function of disconnecting such a line is realized by an example of a line disconnecting unit.

Then, a re-call is made to the receiving station on the basis of a predetermined call control command to restore the communication line (S13).

A means for realizing the function of performing the re-call and surely returning the communication line is an example of the re-call means.

Then, the communication procedure is performed (S14), and the communication data of the first page of the document stored in the communication data memory is retransmitted (S15a).

Next, after the communication state is confirmed in steps S15b and S15c, a predetermined communication procedure is performed (S15d), and the communication data of the original document with the error stored in the communication data memory is sent (S15e). ). As a matter of course, if there is no response in step S15c, steps S15d and S15e are omitted and S25
After displaying the error with, disconnect the line (S26).

After that, as in steps S4 to S7, steps S16 to S19 are performed.
After checking the last page and the communication status such as the communication control signal MPS, the communication data of the original of the next page is sent (S20).

Then, the process returns to step S16 again, and the following steps are repeated until the final page.

The means for realizing the function of continuing the transmission of the series of communication data described above is an example of the first continuous transmission communication means.

With the above configuration, even if the communication line is disconnected,
Since the page number, the page transmitted at the time of disconnection, and the remaining pages of the document are transmitted, it is possible to easily correspond to the already transmitted document. If it is the final page in step S16, the same as in steps S8 to S11.
Perform steps 21 to S24 to disconnect the line and end transmission (S2
Four).

Then, in steps S18 and S22, when the response signal of the other party cannot be normally decoded due to some abnormality in the communication line or the like, the process proceeds to step S25, an error is displayed, and the line is disconnected (S26).

In the process described above, only the communication data of the next page and subsequent pages was sent in step S20, but the communication data of the next page and subsequent pages may be stored.

Note that the procedure for storing the memory in step S3a is the third
As shown in FIGS. (A), (b), and (c), the communication data for the first page of the original document and the subsequent pages were sequentially updated. However, as shown in FIG. 4, all pages are stored and stored. May be.

That is, in step S3a, after the communication data of the first page of the document is stored in the communication data memory, steps S4 to
S7 is repeated, and the process returns to step S3a again, and the communication data of the original on the second page is continuously stored after the communication data memory on the first page, and the third and subsequent pages are similarly stored up to the final page.

In this case as well, if an abnormality similarly occurs, the communication data for one page at the end stored in the communication data memory is retransmitted by the function of the first continuous transmission communication means.

In this case, since the communication data of the manuscript whose transmission has been completed is stored in the communication data memory from the first page to the last page, the same data is transmitted to other receiving stations by so-called memory transmission. It is possible to send communication data having the contents of.

In the above-mentioned processing, an error is displayed and a call is not made again when the line is disconnected for the second time. However, after the processing in step S19 is completed, the processing jumps to processing step S3a, and the predetermined number of times is performed. When the line is disconnected (S6
Or, when it is determined that there is no response in S9), steps S25, S26
May be executed and terminated.

In the first continuous transmission communication means, as described above, the first page of the original document is retransmitted in order to clarify the connection with the already transmitted original document. Therefore, the communication data of the first page is merely reference information for checking the correspondence with the already-transmitted document, and therefore, there is no problem even if the first page is compressed and transmitted. It is desirable to shorten the communication time in this way. This case will be described below.

In FIG. 5 (b), only a part of the communication data of the first page shown by the broken line is taken out and compressed as shown by the solid line,
The amount of communication data is reduced.

As an example of this method, as shown in FIG. 5 (c), when a part of the image shown by the hatched portion of the original is thinned out, or about the upper third of the first page of the original (the other party's name, date, title, etc. The bibliographic items are usually written in this part).

In this way, a means for transmitting a part of the information of the communication data of the first page and for realizing the function of continuously transmitting the communication data for the manuscripts on the following pages and thereafter, similarly to the first continuous transmission communication means thereafter. Is an example of the second continuous transmission communication means.

Therefore, in this case, the communication time can be further shortened.

〔The invention's effect〕

According to the first aspect of the invention, a document reading unit for reading a document to obtain communication data, a communication data memory for storing the communication data, a communication control signal for each page of the document, and a response signal of the other party are confirmed. Communication control means for performing communication control, line disconnecting means for disconnecting the communication line when the communication control signal is sent by the communication control means and the response signal of the other party cannot be normally decoded, and the other party communication for communicating In a communication device comprising call control data storage means for storing call control data including a call connection partner selection signal of the device, a first page communication data storage area for storing first page communication data, and The data storage means having a current page communication data storage area for constantly updating and storing the communication data of the original page currently being sent, and the line disconnection means When the call is disconnected, the re-calling means re-calls based on the stored data of the call control data storing means, and the re-calling by the re-calling means is followed by re-transmitting the communication data stored by the data storing means. In addition, there is provided a communication device comprising a first continuous transmission communication means for continuing the transmission of the remaining unsent originals.

Therefore, if the line is suddenly disconnected due to a disturbance on the line side due to disturbance such as noise, the call will be recalled.
There is a high probability that the line will be restored, and the first page of the manuscript and the last page of the manuscript when the line is disconnected and the remaining sent manuscripts will be sent continuously. , Clearly recognizable.

Therefore, it is possible to reliably perform the nighttime designated transmission, which is commonly used for communication with foreign countries.

Further, since the communication data memory is updated and stored, the memory capacity can be reduced as compared with the case of storing all pages.

Further, as in the second invention, the first continuous transmission communication means is provided with a part of the communication data stored in the first page communication data storage area stored by the data storage means and a current page communication data storage area. In addition to re-transmitting the communication data stored in, the amount of communication data to be transmitted is reduced if the second continuous transmission communication means for continuing the transmission of the remaining unsent originals is replaced, thereby shortening the communication time. be able to.

[Brief description of the drawings]

FIG. 1 is a block diagram of control of a communication device according to an embodiment of the present invention, FIG. 2 is a flowchart showing one processing procedure in the communication device, and FIG. 3 is an example of the communication device data storage means. FIG. 4 is a schematic view showing a memory area of FIG. 4, FIG. 4 is a schematic view showing a memory area of another example of the data storage means, and FIG. 5 is a schematic view showing an example of communication data of the first page.
The figure is a time chart for explaining the communication procedure. [Description of Codes] A ... communication device 1 ... communication control unit 2 ... communication data memory 3 ... operation display unit 4 ... modem 5 ... circuit network control device 6 ... reading unit 7 ... recording unit 10 ...... Communication data.

Claims (2)

(57) [Claims] 1. An original reading means for reading an original to obtain communication data, a communication data memory for storing the communication data, a communication control signal for each page of the original, and a response signal of the other party is confirmed. Communication control means for performing communication control, and when a communication control signal is sent by the communication control means,
Line disconnecting means for disconnecting the communication line when the other party's response signal cannot be normally decoded, and call control data storing means for storing call control data including the call connection partner selecting signal of the other communication device for communication. In a communication device having: a first page communication data storage area for storing the first page communication data, and a current page communication data storage area for constantly updating and storing the communication data of the original page currently being sent. A data storing means comprising: a call storing means for recalling the line based on the data stored in the call control data storing means when the line is disconnected by the line disconnecting means; Then, the communication data stored in the data storage means is retransmitted, and the first continuous transmission communication means for continuing transmission of the remaining unsent originals is provided. A communication device characterized by the following. 2. An original reading means for reading an original to obtain communication data, a communication data memory for storing the communication data, a communication control signal for each page of the original, and confirming the response signal of the other party. Communication control means for performing communication control, and when a communication control signal is sent by the communication control means,
Line disconnecting means for disconnecting the communication line when the other party's response signal cannot be normally decoded, and call control data storing means for storing call control data including the call connection partner selecting signal of the other communication device for communication. In a communication device having: a first page communication data storage area for storing the first page communication data, and a current page communication data storage area for constantly updating and storing the communication data of the original page currently being sent. A data storing means comprising: a call storing means for recalling the line based on the data stored in the call control data storing means when the line is disconnected by the line disconnecting means; Subsequently, a part of the communication data stored in the first page communication data storage area of the data storage means and the communication data stored in the current page communication data storage area are displayed. A communication apparatus comprising: a second continuous transmission communication unit that retransmits and continues the transmission of the remaining unsent originals.