JPH10107987A - Communication terminal equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent error data from causing affect on communication between a relay station and a terminal station by allowing a relay station to delete a page including the error data from a data file in the case that data in the unit of pages include error data. SOLUTION: A program stored in a ROM 14 to control relay multiple address communication includes all programs for the operation of a relay instruction station, a relay station and a terminal station. When the reception of relay multiple address communication instruction information and image data subject to relay multiple address communication from the relay instruction station is finished in the relay station, a CPU 12 starts execution of a control routine. That is, the CPU 12 reads image data from a 2nd RAM 32, checks whether or not an error is included in data of each page and when included, the concerned page is deleted from a data file. Thus, data of the image data file consisting of pages only not including error data are subject to relay multiple address communication to the terminal station.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication terminal device, and more particularly, to a terminal device which receives data in page units from a communication terminal device as a relay instruction station and receives an instruction from a terminal according to an instruction from the relay instruction station. A communication terminal device having a relay function of relaying and broadcasting the data to a communication terminal device as a communication terminal device, or transmitting data in page units to a communication terminal device as a relay station and relaying the data to a communication terminal device as a terminal station The present invention relates to a communication terminal device having a relay instruction function for instructing the relay station to perform broadcasting.

[0002]

2. Description of the Related Art Conventionally, a communication system called a relay broadcast has been used in a facsimile communication network or the like. This relay broadcast is performed by a facsimile apparatus (hereinafter, referred to as a relay instruction station) as a relay instruction station, and a plurality of facsimile apparatuses (hereinafter, referred to as relay stations) as terminal stations. , Referred to as terminal stations) to broadcast data, and the relay station receiving this instruction broadcasts the data to a plurality of terminal stations.

However, in such a relay broadcast,
An error processing method when a data error (for example, an image information error or a decoding error) occurs in transmission data due to line noise (impulse noise, white noise, or the like) during transmission of data from the relay instruction station to the relay station is still not available. Not established.

For example, even if a data error occurs in the data transmitted from the relay instruction station to the relay station, the relay station directly outputs a plurality of data including abnormal data (hereinafter, referred to as error data) caused by the data error. Was transmitted to the terminal. In this case, each terminal station outputs an unreadable document containing error data,
Inconvenience such as occurrence of abnormal operation has occurred.
Further, as described above, the occurrence of a data error is recognized by the operator only after the inconvenience occurs in each terminal station, the data is retransmitted from the relay instruction station to the relay station, and the data is transmitted from the relay station to each of the plurality of terminal stations. Had been resent. As described above, retransmission of data from the relay station to each terminal station is performed, and a large waste occurs in the overall communication time and communication cost.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems. In a relay broadcast, a data error occurring between a relay instruction station and a relay station is determined by the relay station. It is an object of the present invention to provide a communication terminal device capable of preventing influence on communication with a terminal station.

[0006]

According to a first aspect of the present invention, there is provided a communication terminal apparatus for receiving data in page units from a communication terminal apparatus serving as a relay instruction station, and receiving data from the relay instruction station. A communication terminal device as a relay station that relays the data to a communication terminal device as a terminal station based on an instruction, and determines whether the received page-based data includes error data in page units. It is characterized by comprising: a determination unit; and a relay broadcast control unit that controls to relay only data of a page that does not include error data based on a determination result by the determination unit.

A communication terminal device according to a second aspect of the present invention receives data in page units from a communication terminal device as a relay instruction station, and transmits data to a communication terminal device as a terminal station based on an instruction from the relay instruction station. A communication terminal device serving as a relay station that relays and broadcasts the data, wherein the determination unit determines whether the received page-based data includes error data in page units, and a determination result by the determination unit. And an execution prohibiting unit for prohibiting the execution of the relay broadcast when at least one page including the error data exists.

According to a third aspect of the present invention, a communication terminal apparatus receives data in page units from a communication terminal apparatus as a relay instruction station, and transmits the data to a communication terminal apparatus as a terminal station based on an instruction from the relay instruction station. A communication terminal device serving as a relay station that relays and broadcasts the data, wherein the determination unit determines whether the received page-based data includes error data in page units, and a determination result by the determination unit. If there is a page containing error data in
Retransmission data receiving means for receiving data retransmitted from the relay instruction station, and, by the data retransmitted from the relay instruction station, when there is no longer a page containing error data within a predetermined time limit, Retransmission wait control means for controlling to start the relay broadcast from the time when the broadcast is lost.

Further, in the communication terminal device according to the fourth aspect,
4. The communication terminal device according to claim 3, wherein the retransmission wait control unit is configured to, if the page including the error data is not exhausted within the time limit, delete the page not including the error data when the time limit has elapsed. It is characterized in that it is controlled to relay only data.

According to a fifth aspect of the present invention, the communication terminal device divides the data in page units into blocks each having a data amount smaller than one page, and transmits the data to the communication terminal device as a relay station in block units. A relay instruction station that instructs the relay station to relay the data to a communication terminal device as a terminal station, and determines that the block transmitted by the relay station includes error data. When the retransmission of the block is requested,
An error correction function (ECM for retransmitting the block to the relay station)
Function), wherein the relay station has the E
Function determining means for determining whether or not the relay station has the CM function and whether or not the ECM function can be executed;
Broadcast instruction prohibiting means for prohibiting a relay broadcast instruction to the relay station when the CM function is not executable.

According to a sixth aspect of the present invention, there is provided a communication terminal apparatus which receives data in page units from a communication terminal apparatus serving as a relay instruction station in block units having a data amount smaller than one page, and receives data from the relay instruction station. A relay station that relays and broadcasts the data to a communication terminal device as a terminal station based on the instruction, and determines whether the received block includes error data, and the block includes error data. If the error correction function (EC) requests the retransmission instruction station to retransmit the block and corrects a data error by using a block that does not include the retransmitted error data (EC
(M function), a function determining means for determining whether or not the relay instruction station has the ECM function and is in a state where the ECM function can be executed; When the indicating station does not have the ECM function or is not in a state where the ECM function can be executed, there is provided an instruction rejecting unit that rejects an instruction for relay broadcast from the relay indicating station.

According to a seventh aspect of the present invention, there is provided a communication terminal device which divides a page unit of data into blocks each having a data amount smaller than one page and transmits the data to the communication terminal device as a relay station in units of the blocks. A relay instruction station that instructs the relay station to relay the data to a communication terminal device as a terminal station, and determines that the block transmitted by the relay station includes error data. When the retransmission of the block is requested,
An error correction function (ECM for retransmitting the block to the relay station)
Counting means for counting, for each block, the number of retransmissions of retransmitting a block during execution of relay broadcasting by the ECM function with the relay station;
Relay broadcast stopping means for stopping relay broadcast with the relay station when the data error of the block is not resolved even if the number of retransmissions reaches a predetermined limit number.

The communication terminal device according to the present invention receives data from a communication terminal device as a relay instruction station in units of blocks having a data amount smaller than one page, and receives data from the relay instruction station. A relay station that relays and broadcasts the data to a communication terminal device as a terminal station based on the instruction, and determines whether the received block includes error data, and the block includes error data. If the error correction function (EC) requests the retransmission instruction station to retransmit the block and corrects a data error by using a block that does not include the retransmitted error data (EC
(M function), wherein a retransmission of a block is started by the relay instruction station while the ECM function is performing the relay broadcast with the relay instruction station, and then the retransmission of the block is performed by the relay instruction station. If canceled by the command station,
A prohibiting unit for prohibiting relay broadcasting of a page including the block whose retransmission has been stopped is provided.

According to a ninth aspect of the present invention, a communication terminal apparatus receives data in page units from a communication terminal apparatus as a relay instruction station, and transmits the data to a communication terminal apparatus as a terminal station based on an instruction from the relay instruction station. A message acknowledgment signal (MCF signal) when the relay station is a relay station for relaying and broadcasting the data and the received data does not include error data.
And the ratio of the error data to the received data (error rate)
Is less than a predetermined tolerance, the retraining positive signal (R
Communication having a function of executing a so-called G3 procedure including a procedure of transmitting a retraining denial signal (RTN signal) to the relay instruction station for each page when the error rate is higher than a predetermined allowable value. A terminal device,
When performing the relay broadcast according to the G3 procedure with the relay instruction station, the predetermined allowable value is changed to 0, so that the received data contains any error data. Signal transmission control means for controlling transmission to the relay instruction station.

[0015] The communication terminal device according to claim 10 is
10. The communication terminal device according to claim 9, further comprising a relay broadcast prohibition unit that prohibits relay broadcast of a page including the error data.

According to a first aspect of the present invention, the communication terminal apparatus receives data in page units from the relay instruction station as a relay station in the relay broadcast, and transmits the data to the terminal station based on an instruction from the relay instruction station. Broadcast to relay. In the communication terminal device as such a relay station, the determination unit determines whether the received data in page units includes error data in page units. Then, based on the above determination result, the relay broadcast control means controls to relay only the data of the page not including the error data. The communication procedure between the relay instruction station and the own station (relay station) in the relay broadcast can be applied to any communication procedure (G3 procedure, ECM procedure, etc.).

Thus, the data of the page not including the error data is relay-broadcast, while the data of the page including the error data is not relay-broadcast to the terminal station. Therefore, it is possible to prevent inconvenience such that the page data including the error data is relayed to the terminal station, and the terminal station outputs an unreadable document or causes an abnormal operation. Further, since there is no need to retransmit data from the local station (relay station) to the terminal station as in the related art, the overall communication time and communication cost of relay broadcast can be reduced. That is, when the present invention is applied to the case of relay broadcasting to many terminal stations, the effect of reducing communication time and communication cost is great.

Further, in the communication terminal device as a relay station according to the second aspect, the determination means determines whether or not the received data in page units includes error data in page units. If there is at least one page including the error data as a result of the determination, the execution prohibiting unit prohibits the execution of the relay broadcast.

Accordingly, if at least one page including the error data exists, the execution of the relay broadcast is prohibited, so that the data of the page including the error data is relayed to the terminal station. This can be completely prevented, and the inconvenience at the terminal station as described above can be prevented.

Further, in the communication terminal device as a relay station according to the third aspect, the determination unit determines whether or not the received data in page units includes error data in page units. Here, it is assumed that the relay instruction station has a page retransmission function, and if there is a page containing error data in the above determination result, the data retransmitted from the relay instruction station is sent to the retransmission data receiving unit. Receive by.

When there is no longer a page containing error data within a predetermined time limit due to the data retransmitted from the relay instruction station, the retransmission wait control means starts relay broadcasting from the point at which the page disappears. Control.

On the other hand, if the page containing the data error does not run out within the time limit, the retransmission wait control means includes the error data when the time limit expires. May be controlled so as to relay only the data of the page which is not described above to the terminal station. In this case, even if the data of all the pages cannot be relayed and broadcast, the pages that do not include the error data are relayed and broadcast.

An error correction function (ECM function) is known as a communication control method between communication terminal apparatuses. In the ECM function, a communication terminal device on the transmission side divides data in page units into blocks each having a data amount smaller than one page, and transmits the data to the communication terminal device on the reception side in block units. The receiving communication terminal device determines whether the received block includes error data. As a result, if the block contains error data, the retransmission of the block is requested to the communication terminal device on the transmission side. Then, the transmitting communication terminal device that has received the request retransmits the block to the receiving communication terminal device,
The communication terminal on the receiving side corrects the data error by the block that does not include the retransmitted error data.

If relay broadcasting is performed by the ECM function as described above, data including error data will not be broadcasted to the terminal station. Therefore, when broadcasting a broadcast, E
The invention according to claim 5 and claim 6 has been made in order to use the CM function.

In the communication terminal device according to the fifth aspect,
It has an ECM function as described above, and transmits data in page units to the relay station as a relay instruction station in relay broadcasting, and instructs the relay station to relay and broadcast the data to the terminal station. .

In such a communication terminal apparatus as a relay instruction station having the ECM function, the determining means determines whether or not the relay station has the ECM function and is in a state capable of executing the ECM function. The state in which the relay station can execute the ECM function means, for example, that the working memory of the relay station has a free space equal to or more than a predetermined amount necessary for executing the ECM function. Note that the memory capacity required for executing the ECM function is usually 64 kilobytes.

The above-described determination may be made by transmitting an inquiry signal to the relay station and making a determination based on the response content. For example, a digital identification signal (DIS) transmitted from the receiving side (relay station) in the G3 facsimile procedure may be used. The determination may be made by analyzing information on the reception function of the relay station recorded in a predetermined information field (FIF) of the signal.

As a result of the determination, when the relay station does not have the ECM function or is not in a state where the ECM function can be executed, the broadcast instruction prohibiting unit prohibits the relay station from performing the relay broadcast instruction.

[0029] Thus, when the relay station serving as the partner station for performing the relay broadcast does not have the ECM function,
When the M function is not in an executable state, the relay station is not instructed to perform the relay broadcast. That is, it is possible to prevent the relay broadcast from being performed by means other than the ECM function.

[0030] On the other hand, the communication terminal device according to the sixth aspect is characterized in that:
As a relay station having the CM function, the determination unit determines whether or not the relay instruction station has the ECM function and is in a state where the ECM function can be executed. As described above, the relay instruction station is in a state in which the ECM function can be executed, for example, when the working memory of the relay instruction station has a free space equal to or more than a predetermined amount (64 kilobytes) necessary for executing the ECM function. means.

The above determination may be made by transmitting an inquiry signal to the relay instruction station and making a determination based on the response content.
For example, analyzing information on the function of the relay instruction station recorded in a predetermined information field (FIF) of a digital command signal (DCS signal) transmitted from the transmission side (relay instruction station) in the G3 facsimile procedure. May be determined by the following.

As a result of such a determination, the relay instruction station becomes EC
When the M function is not provided or the ECM function is not executable, the instruction rejection means rejects the instruction of the relay broadcast from the relay instruction station.

Thus, when the relay instruction station, which is the other party in the case of performing the relay broadcast, does not have the ECM function or is not in a state where the ECM function can be executed, the instruction of the relay broadcast from the relay instruction station is given. Is rejected. That is, it is possible to prevent the relay broadcast from being performed by means other than the ECM function.

In the meantime, the communication terminal device according to the present invention executes, as a relay instruction station having an ECM function, a relay broadcast using the ECM function with the relay station. If a data error occurs during this execution, the block in which the data error has occurred is retransmitted from the relay instruction station to the relay station by the ECM function.

In the communication terminal apparatus as a relay instruction station according to the present invention, the number of retransmissions of the above-described block is counted for each block by the counting means. Then, if the data error of the block is not resolved even if the number of retransmissions for one block reaches the predetermined limit, the relay broadcast stopping means stops the relay broadcast with the relay station.

Further, the communication terminal device according to claim 8 is characterized in that:
As a relay station with CM function,
The relay broadcast is performed by the CM function. If a data error occurs during this execution, the block in which the data error has occurred is retransmitted from the relay instruction station to the relay station (own station) by the ECM function, and if there is no data error in the retransmitted block, the block without the data error is transmitted. Corrects the data error.

However, when the retransmission of a block due to the occurrence of a data error is started by the relay instruction station, but the retransmission of the block is subsequently stopped by the relay instruction station, the page including the block whose retransmission has been stopped is received. Is prohibited by the prohibition means.

Thus, it is possible to prevent a page including a block whose data error has not been eliminated from being relayed to the terminal station.

Next, the communication terminal device according to the ninth aspect receives data in page units from the relay instruction station as a relay station in the relay broadcast, and sends the data to the terminal station based on the instruction from the relay instruction station. The data is relayed and broadcast. The communication terminal device according to the ninth aspect has a function of executing a so-called G3 procedure.

In the G3 procedure, the transmitting communication terminal device transmits data in page units to the receiving communication terminal device, and the receiving communication terminal device does not include error data in the received data. Message confirmation signal (MC
F signal), a retraining positive signal (RTP signal) is output when the error data is included in the received data and the ratio of the error data to the received data (error rate) is equal to or less than a predetermined allowable value. If it is higher than a predetermined allowable value, a retraining negative signal (RTN signal) is sent to the relay instruction station for each page.

In the G3 procedure, the transmitting side determines whether the signal transmitted from the receiving side is an MCF signal, an RTP signal, or an RTN signal to determine whether the received data contains error data. No and the magnitude of the error rate can be recognized. At this time, if an RTN signal is sent from the receiving side, a data error occurs in the transmitted data, and it can be determined that the error rate is higher than a predetermined allowable value. It is possible to cope with an error such as resending data or stopping transmission.

In the communication terminal device as a relay station according to the ninth aspect, when the relay broadcast is performed by the G3 procedure with the relay instruction station, the signal transmission control means sets the predetermined allowable value to 0. Is controlled to transmit the RTN signal to the relay instruction station when the received data includes any error data.

That is, when the predetermined allowable value is changed to 0,
If there is no error data in the received data, an MCF signal is sent to the relay instruction station. If the received data contains any error data, an RTN signal is sent to the relay instruction station, and no RTP signal is sent. .

As described above, if any error data is included in the received data, the RTN signal is transmitted to the relay instruction station, so that the relay instruction station generates a data error in the transmitted data, and the error rate is reduced. When it is determined that the value is higher than the allowable value, it is possible to cope with an error such as retransmitting the page including the error data or stopping transmission of the page or execution of the relay broadcast.

When the received data contains any error data, the page containing the error data is relay-broadcasted by the relay broadcast prohibiting means as in the tenth aspect of the present invention. It is desirable to prohibit that. Thus, it is possible to prevent a page including error data from being relayed to the terminal station.

Note that a facsimile apparatus can be applied as the communication terminal apparatus according to the present invention. In addition, other communication terminals that can execute relay broadcasting can be applied.

[0047]

BEST MODE FOR CARRYING OUT THE INVENTION

[First Embodiment] Hereinafter, a first embodiment corresponding to the first aspect of the present invention will be described.

FIG. 1 shows a communication terminal device 10 according to the present invention.
Is shown in FIG. CPU 1 shown in FIG.
2 controls the entire communication terminal device 10, and the CPU 12
Is connected to a ROM 14 and a first RAM 16 as a working memory for processing by the CPU 12. The ROM 14 stores various control programs executed by the CPU 12, and the first RAM 16 temporarily stores control information and various data used by the control programs.

The CPU 12 has an RTC (Real Tim
e Clock) 18, a keyboard 20, a display 22, and a speaker 23 are connected to each other. CPU 12
Recognizes the current time from the built-in clock of the RTC 18. Further, the CPU 12 recognizes the operator's instruction by detecting the state of the keyboard 20, displays various information for the operator using the display 22, and emits a warning sound to the operator using the speaker 23. Can be.

Further, the CPU 12 includes a scanner 24,
Third RAM 26, printer 28, encoding / decoding device 3
0, the second RAM 32, the modem 34, and the NCU 36 are connected. The encoding / decoding device 30 has an encoding function of encoding image data based on facsimile communication standards and a decoding function of restoring the encoded image data. The CPU 12 controls the scanner 24 and the third RA
M26, printer 28, encoding / decoding device 30, second
A control signal is sent to the RAM 32, the modem 34, and the NCU 36 to detect the operation state of each device.

The scanner 24 and the printer 28 are connected to a third RAM 26, respectively. The scanner 24 reads an original, and stores image data of the read original in the third RAM 26.
26. The printer 28 prints the image data stored in the third RAM 26 on a predetermined sheet. The image data read by the scanner 24 is directly used by the printer 2.
8, the communication terminal device 10 can be used as a copying machine.

The third RAM 26 is connected to the encoding / decoding device 30, and the encoding / decoding device 30
It is connected to the RAM 32. The image data stored in the third RAM 26 is encoded by the encoding function of the encoding / decoding device 30, and the encoded image data is
It is stored in the RAM 32. The second RAM 32 has a modem 3
4 and the modem 34 is connected to the communication line 38 via the NCU 36. This modem 34 has a second RAM
32, modulates the encoded image data into analog image information, and transmits the modulated image data to the communication line 38 via the NCU 36.
To send to.

Conversely, analog image information received from the external communication terminal device via the communication line 38 and the NCU 36 is demodulated into image data by the modem 34, and the demodulated image data is stored in the second RAM 32. This second
The image data stored in the RAM 32 is checked for the presence or absence of error data by the CPU 12, and when there is no error data or when error data is lost due to retransmission or the like described later, the decoding function of the encoding / decoding device 30 performs The data is decrypted and stored in the third RAM 26.

The program for controlling the relay broadcast processing stored in the ROM 14 is a program for operating as a relay instruction station, a program for operating as a relay station, and a program for operating as a terminal station. The CPU 12 reads out each program from the ROM 14 and executes it. That is, the communication terminal device 10 has all the functions of the relay instruction station, the relay station, and the terminal station.

Further, the CPU 12 determines whether or not the image data before decoding, received from the external communication terminal device and stored in the second RAM 32, includes error data, in units of pages of the image data. And a function of controlling the method of relay broadcasting based on the determination result (for example, relaying only pages that do not contain error data, or relaying broadcasting when at least one page containing error data exists). Function to stop the operation, etc.)
It has.

Next, the operation of the first embodiment will be described.
Here, the outline of the relay broadcast will be described first with reference to FIG. As shown in FIG. 2, the relay broadcast refers to a communication terminal device 10A (hereinafter, referred to as terminal A) called a relay instruction station.
A plurality of communication terminal devices 10C, 10D, and 10E (hereinafter, referred to as terminal stations) which transmit data to a communication terminal device 10B (hereinafter, referred to as a terminal B) called a relay station and which are called terminal stations, respectively. E), and instructs the terminal B to broadcast the data, and the terminal B broadcasts the data to the terminals C, D, and E based on the instruction.

This communication mode is for reducing the communication charge when broadcasting to a plurality of destinations. For example, when data is transmitted from the head office in Tokyo (relay instruction station) to multiple offices in the Osaka area, broadcasting from the head office to multiple offices will result in extra toll charges. The overall communication fee will be very high. Therefore, FIG.
As shown in (1), data is transmitted from the head office to one business office in Osaka, and the data is broadcast from the one business office to another business office in Osaka. As a result, the toll call fee is charged only once, and the other communications need only be the local call fee, so that the overall communication fee can be reduced.

Next, a relay broadcast control process after completion of image data reception, which is executed by the terminal B as a relay station according to the first embodiment, will be described with reference to FIG.

When the terminal B completes the reception of the relay broadcast instruction information including the relay broadcast instruction command and the terminal information of the relay broadcast and the image data to be relayed from the terminal A, the control routine of FIG. Execution is started by the CPU 12. In step 102 of FIG. 3, an image data file is read from the second RAM 32, and in the next step 104, it is checked whether or not error data is included in data of one page (hereinafter referred to as page data) of the image data. I do. If error data is included in this check, an affirmative determination is made in step 106, and the flow advances to step 108 to delete the page data from the image data file.

On the other hand, if the error data is not included in the check in step 104, a negative determination is made in step 106, and the process proceeds to step 110 without deleting the page data as described above. In step 110, it is determined whether or not a check has been performed for all pages to determine whether or not the error data in step 104 has been included. If there is a page that has not been checked yet, the process returns to step 104, and a check is performed to determine whether the unchecked page contains error data.
Pages containing error data are deleted from the image data file. Hereafter, such a step 1
The processing of steps 04 to 108 is executed for each page of the image data.

Step 1 for all pages of image data
When the processes of steps 04 to 108 are completed, an affirmative determination is made in step 110 and the process proceeds to step 112. Further, the image data file at this time is composed of only pages that do not include error data. In step 112, the data of the image data file composed of only the page not containing the error data is relayed to the terminal station.

When the relay broadcast to the terminal station is completed, a communication termination process is performed in step 114 and the process is terminated.

As described above, in the first embodiment, the terminal B as the relay station performs a page-by-page check on whether or not error data is included in the data received from the terminal A as the relay instruction station. Only the pages that do not contain the error data are relayed to the terminal station, so the data of the pages that contain the error data are relayed to the terminal station, and the terminal station outputs an unreadable document. It is possible to prevent inconveniences such as the occurrence of decoding errors and abnormal operations.

[Second Embodiment] Next, a second embodiment according to the present invention will be described.
An embodiment will be described. This second embodiment corresponds to the second aspect of the present invention. In the image data received by the terminal B as a relay station, when there is at least one page including error data, the relay to the terminal station is performed. An example in which control is performed so as not to perform any information will be described. The configuration of the communication terminal device according to the second embodiment is the same as the configuration of the communication terminal device according to the first embodiment, and a description thereof will not be repeated.

The relay broadcast control processing after completion of image data reception, which is executed by the terminal B as a relay station according to the second embodiment, will be described below with reference to FIG.

When the terminal B completes the reception of the relay broadcast instruction information and the image data to be relayed from the terminal A, the terminal B in FIG.
Is started by the CPU 12.
In the control routine of FIG. 4 and the control routine of FIG. 5 described later, “A” is added to the end of the step number for the same processing as the control routine of FIG.
Is attached.

In step 102A of FIG.
Read the image data file from the next step 10
In 4A, it is checked whether error data is included in one page of the image data. Since then
The check in step 104A is performed page by page.

If it is determined in step 104A that there is a page containing error data, the flow advances to step 107 to display an error message indicating that a page containing error data exists on the display 22 and to display the speaker. A predetermined alarm sound is issued from 23 to make the operator recognize the abnormality. Thereafter, the relay broadcast is not performed at all, and the process proceeds to step 114A, where a communication end process is performed and the process ends.

On the other hand, step 104A for all pages
As a result of the check, if the page containing the error data does not exist, the process proceeds to step 112A to relay the image data to the terminal station. Then, when the relay broadcast to the terminal station ends, a communication end process is performed in step 114A, and the process ends.

As described above, in the second embodiment, if there is at least one page containing error data in the image data received by the terminal B as the relay station, the relay broadcast to the terminal station is not performed at all. Since it is controlled not to perform, the data of the page containing the error data is relayed to the terminal station,
Inconveniences such as output of an unreadable document at the terminal station, occurrence of a decoding error, and abnormal operation can be prevented.

Third Embodiment Next, a third embodiment according to the present invention will be described.
An embodiment will be described. The third embodiment corresponds to the third and fourth aspects of the present invention. In the event that a data error occurs, the terminal B as a relay station transmits a signal from the relay instruction station (terminal A) up to a predetermined time limit. An example in which control is performed to wait for retransmission will be described. The configuration of the communication terminal device according to the third embodiment is the same as the configuration of the communication terminal device according to the first embodiment, and a description thereof will not be repeated.

Hereinafter, terminal B as a relay station will be described with reference to FIG.
The relay broadcast control process executed after the completion of the image data reception will be described. In the terminal B, when the reception of the relay broadcast instruction information and the image data to be relayed and broadcast is completed from the terminal A, the control routine of FIG. In step 102A of FIG. 5, the image data file is read from the second RAM 32, and the next step 104A
Then, it is checked whether error data is included in one page of the image data. Thereafter, the check of step 104A is performed page by page.

If it is determined in step 104A that there is a page containing error data (hereinafter, referred to as an error page), the process proceeds to step 109, where the data of the page is deleted from the image data file and the page is deleted. Is stored in the first RAM 16.

Hereinafter, steps 104A to 104A
The processing of No. 9 is executed for each page of the image data. Steps 104A-for all pages of image data
When the process of step 109 is completed, an affirmative determination is made in step 110A and the process proceeds to step 116. Further, the image data file at this time is composed of only pages containing no error data, and the first RAM 16 stores the numbers of all error pages.

In step 116, it is determined whether or not there is any error data in all pages based on whether or not even one error page number is stored in the first RAM 16. Here, if there is no error data in all pages, the process proceeds to step 130 described later, and if there is even one error page, the process proceeds to step 118, and RT
In C18, a timer for a predetermined time limit is started.

In the next step 120, it is determined whether or not retransmission data of the error page from terminal A has been received. If no retransmission data has been received from the terminal A, the process proceeds to step 122, and it is monitored whether or not a timeout has occurred. If not, step 120
Return to

If retransmission data from terminal A is received in step 120, the process proceeds to step 124, where it is confirmed that the received retransmission data has no error data. If there is error data in the retransmission data, the process returns to step 120 and waits for retransmission from terminal A again. on the other hand,
If there is no error data in the retransmission data in step 124, the process proceeds to step 126, where the retransmission data is stored in the image data file, and the page number is deleted from the error page number stored in the first RAM 16.

In the next step 128, step 126
Then, it is determined whether or not the error data has been lost in all pages by storing the retransmission data. If there is still an error page, the process returns to step 120 and waits for retransmission from terminal A again.

If the timeout occurs in step 122 before the error data disappears in all pages in step 128, the process proceeds to step 130, where the image data stored in the image data file at that time is relayed to the terminal station. I do. In this case, not all pages are stored in the image data file without error data, but pages without error data received before the time-out is stored. That is, step 130
In this case, only pages without error data received before the time-out are relayed to the terminal station.

On the other hand, before the time-out in step 122, if there is no error data in all pages in step 128, and if there is no error data in all pages in step 116, the process also proceeds to step 130. The image data stored in the data file is relayed to the terminal station. In these cases, all pages are stored in the image data file without error data. That is, in step 130, all pages without error data are relayed to the terminal station. Then, when the relay broadcast to the terminal station ends, a communication end process is performed in step 132, and the process ends.

As described above, in the third embodiment, when there is at least one page containing error data in the image data received by the terminal B as a relay station, the relay instruction is performed with a predetermined time limit as an upper limit. Waiting for retransmission from the station, if all pages have no error data within the time limit, relay all the pages without error data from that point.

As described above, even if a data error occurs, all pages can be formed without error data by waiting for retransmission from the relay instruction station, and all pages without error data can be relayed. can do.

Further, since the retransmission waiting from the relay instruction station is performed with a predetermined time limit as an upper limit, for example, when the data error is not immediately resolved due to the deterioration of the line quality, the retransmission from the relay instruction station is performed. It is possible to avoid waiting for a long time. At this time, only a page without error data at the time when the time limit has elapsed can be relayed and broadcast.

[Fourth Embodiment] Next, a fourth embodiment according to the present invention will be described.
An embodiment will be described. The fourth embodiment corresponds to the invention of claim 5, and shows an example in which the terminal A controls the terminal B to instruct the terminal B to perform the relay broadcast only when the terminal B is in a state where the ECM function can be executed. The configuration of the communication terminal device according to the fourth embodiment is the same as the configuration of the communication terminal device according to the first embodiment, and a description thereof will not be repeated.

In the following fourth embodiment, it is assumed that the terminal A and the terminal B transmit and receive information according to the G3 procedure. Therefore,
First, a communication procedure between a transmitting terminal (here, terminal A) and a receiving terminal (here, terminal B) according to the G3 procedure will be described with reference to FIG.

As shown in FIG. 10, first, a call signal (CNG signal) is sent from terminal A to terminal B, and then a called terminal identification signal (CED signal) is returned from terminal B to terminal A. Further, the terminal B sends a digital identification signal (DIS signal) indicating the full capability of the terminal B to the terminal A.

Terminal A that has received the DIS signal sends
Select the function to use for transmission from the ability indicated by the S signal,
Digital command signal (DCS signal) indicating the selected function
To terminal B. Further, the terminal A receives a training signal for adjustment between modems (= training check, TCF).
To terminal B. When the adjustment of the modem is completed, the terminal B sends a reception preparation confirmation signal (CFR signal) indicating that the preparation for receiving the message is completed to the terminal A.

Terminal A having received the CFR signal transmits the encoded image data to terminal B. After the transmission of the image data of the predetermined unit is completed, a multi-page signal (MPS signal) indicating that the next image data is transmitted
To terminal B.

On the other hand, the terminal B calculates the ratio (error rate) of the error data contained in the received image data, and according to the error rate, the message confirmation signal (MCF signal) and the retraining acknowledgment signal (RTP) Signal) or a retraining negation signal (RTN signal). Specifically, when the error rate is 0, the MCF
When the error rate is equal to or less than a predetermined allowable value, an RTP signal is sent, and when the error rate is higher than a predetermined allowable value, an RTN signal is sent.

Thereafter, terminal A transmits the remaining image data to terminal B.
When all the image data has been transmitted, a procedure end signal (EOP signal) is transmitted to the terminal B. Then, when the MCF signal is responded from the terminal B, the terminal A sends a disconnection command signal (DCN signal) to the terminal B and ends the communication with the terminal B.

Note that terminal B may return a called terminal identification signal (CSI signal) or a non-standard function identification signal (NSF signal) to terminal A instead of sending the DIS signal. Further, a non-standard function setting signal (NSS signal) may be transmitted from terminal A to terminal B as a response to the NSF signal.

Hereinafter, the relay broadcast control processing executed by the terminal A as the relay instruction station will be described with reference to FIG.
In the terminal A, the control routine of FIG.

At step 152 in FIG.
Send a signal (dialing). Then, terminal B
After receiving the CED signal from the terminal B, the terminal waits for reception of the NSF signal or DIS signal from the terminal B in the next step 154. When the NSF signal or the DIS signal is received from the terminal B, the process proceeds to step 156, and whether or not the terminal B, which is the partner, has the relay broadcast function is recorded in a predetermined information field (FIF) such as the DIS signal. The determination is made by analyzing the received information on the reception function of the terminal B.

If the terminal B does not have the relay broadcast function, the relay broadcast cannot be executed, so the process proceeds to step 166, and an error message indicating that the relay broadcast cannot be executed is displayed on the display 22. Is displayed and a predetermined alarm sound is emitted from the speaker 23 to perform a communication termination process (step 168), and the process is terminated.

On the other hand, if the terminal B has the relay broadcast function in step 156, the process proceeds to step 158, where the terminal B
Is provided with a predetermined information field (FIF) such as a DIS signal in the same manner as described above.
The determination is made by analyzing the information on the reception function of the terminal B recorded in the terminal.

If the terminal B does not have the function of executing the ECM procedure, the relay broadcast cannot be executed in accordance with the ECM procedure. Therefore, in the fourth embodiment, the execution of the relay broadcast is not performed. Shall be. Therefore, in this case, the process proceeds to step 166, where an error message indicating that the relay broadcast cannot be executed and a predetermined alarm sound are output.

On the other hand, if the terminal B has the function of executing the ECM procedure in step 158, the flow advances to step 160 to determine whether or not the terminal B has a free memory of 64 kilobytes or more necessary for executing the ECM procedure. Is determined by analyzing the information on the reception function of the terminal B recorded in a predetermined information field (FIF) such as a DIS signal in the same manner as described above.

Here, even when the terminal B does not have an empty memory of 64 kilobytes or more, the relay broadcast cannot be executed in accordance with the ECM procedure as described above, so that the relay broadcast is not executed. Therefore, in this case as well, the process proceeds to step 166, where an error message indicating that relay broadcasting cannot be executed and a predetermined alarm sound are output.

On the other hand, if the terminal B has a free memory of 64 kilobytes or more in the step 160, the relay broadcast according to the ECM procedure can be executed.
The process proceeds to step 2 to instruct the terminal B to transmit a relay broadcast by transmitting a relay broadcast instruction command and information on terminal stations (terminals C, D, and E in FIG. 2) in the relay broadcast. In the next step 164, the terminal B transmits the
And relays the image data in cooperation with the terminal B. Then, when the relay broadcast is completed, a communication end process is performed (step 168), and the process ends.

As described above, terminal A as a relay instruction station
In this case, only when the terminal B has the ECM function and is in a state where the ECM function can be executed, the terminal B instructs the terminal B to perform the relay broadcast. Therefore, the relay broadcast can be executed in accordance with the ECM procedure. That is, by performing the relay broadcast according to the ECM procedure, it is possible to prevent the image data including the error data from being relay-broadcast to the terminal station.

[Fifth Embodiment] Next, a fifth embodiment according to the present invention will be described.
An embodiment will be described. This fifth embodiment corresponds to the invention of claim 6, and shows an example in which the terminal B controls to accept the relay broadcast instruction from the terminal A only when the terminal A is in a state where the ECM function can be executed. . The configuration of the communication terminal device according to the fifth embodiment is the same as the configuration of the communication terminal device according to the first embodiment, and a description thereof will not be repeated. In the fifth embodiment, the terminal A and the terminal B are G3
It is assumed that information is transmitted and received by the procedure.

Hereinafter, terminal B as a relay station will be described with reference to FIG.
Will be described. At the terminal B, the control routine of FIG.
Execution is started by U12.

At step 202 in FIG. 7, the terminal waits for an incoming call from another terminal (here, terminal A). When the call arrives, the process proceeds to step 204, where a CED signal is sent to terminal A. In the next step 206, the NSF signal, CSI
Either the signal or the DIS signal is transmitted to the terminal A. In the next step 208, reception of the NSS signal or the DCS signal is waited.

When receiving the NSS signal or DCS signal,
Proceeding to step 210, it is determined whether or not there is an instruction for relay broadcast from the terminal A. Here, if there is no instruction for relay broadcasting, the process proceeds to step 212, and normal reception processing is executed. After the reception process is completed, a communication end process is performed (step 222), and the process ends.

On the other hand, if there is a relay broadcast instruction in step 210, the flow advances to step 214 to determine whether or not terminal A, which is the partner, has an ECM procedure execution function.
The determination is made by analyzing information about the function of the terminal A recorded in a predetermined information field (FIF) such as an S signal.

If the terminal A does not have the function of executing the ECM procedure, the relay broadcast cannot be executed in accordance with the ECM procedure. Therefore, in the fifth embodiment, the execution of the relay broadcast is not performed. Shall be. Accordingly, in this case, the process proceeds to step 220, where an error message indicating that the relay broadcast cannot be executed is displayed on the display 22, a predetermined alarm sound is emitted from the speaker 23, and communication termination processing is performed (step 222). To end.

On the other hand, if the terminal A has the function of executing the ECM procedure in step 214, the flow advances to step 216 to determine whether or not the terminal A has a free memory of 64 KB or more necessary for executing the ECM procedure. Is determined by analyzing information on the function of the terminal A recorded in a predetermined information field (FIF) such as a DCS signal in the same manner as described above.

Here, if there is no free memory of 64 kilobytes or more in the terminal A, the relay broadcast cannot be executed in accordance with the ECM procedure as described above, so that the relay broadcast is not executed. Therefore, in this case as well, the process proceeds to step 220, where an error message indicating that relay broadcasting cannot be executed and a predetermined alarm sound are output.

On the other hand, if it is determined in step 216 that the terminal A has an empty memory of 64 kilobytes or more, the relay broadcast according to the ECM procedure can be executed.
Then, the process proceeds to step S8, where the image data to be relayed is received from the terminal A, and the image data is relayed to the terminal stations (terminals C, D, and E in FIG. 2) based on the relay broadcast instruction from the terminal A. . When the relay broadcast is completed, a communication termination process is performed (step 222), and the process is terminated.

As described above, in terminal B as a relay station, only when terminal A has the ECM function and can execute the ECM function, it accepts the relay broadcast instruction from terminal A. Can be performed along with the ECM procedure. That is, by performing the relay broadcast according to the ECM procedure, it is possible to prevent the image data including the error data from being relay-broadcast to the terminal station.

[Sixth Embodiment] Next, a sixth embodiment according to the present invention will be described.
An embodiment will be described. This sixth embodiment corresponds to the invention described in claim 7, and in the terminal A as a relay instruction station,
An example in which retransmission is controlled when a data error occurs during relay broadcasting with the terminal B according to the ECM procedure will be described. The configuration of the communication terminal device according to the sixth embodiment is the same as the configuration of the communication terminal device according to the first embodiment, and a description thereof will not be repeated.

Hereinafter, the retransmission control processing executed by terminal A as a relay instruction station will be described with reference to FIG. At the terminal A, the control routine of FIG.
Execution is started by U12. Step 232 in FIG.
In this case, a relay broadcast instruction is issued to the terminal B, and a counter n for counting the number of retransmissions is initialized to "0". In the next step 234, transmission of image data to the terminal B is started in block units.

In the next step 236, it is determined whether or not the transmission of the image data to the terminal B has been completed. If the transmission of the image data has not been completed, the flow proceeds to step 238. In step 238, it is determined whether or not error data has been detected. If no error data has been detected, the process returns to step 236.

On the other hand, if error data is detected in step 238, the flow advances to step 240 to retransmit the block in which the data error has occurred to terminal B. Next Step 24
In step 2, it is determined whether or not error data is detected in retransmission. If no error data is detected, step 23 is executed.
Return to 6.

If error data is detected by retransmission in step 242, the process proceeds to step 244, and the counter n is incremented by one. In the next step 246, it is determined whether or not the counter n has exceeded a predetermined number N. If the counter n has not exceeded the predetermined number N, the process returns to step 240 and the block in which the data error has occurred is stored in the terminal. Resend to B.

On the other hand, if the counter n has exceeded the specified number N in step 246, the flow advances to step 248 to display an error message on the display 22 indicating that the relay broadcast cannot be executed, and a predetermined alarm from the speaker 23. A sound is emitted to perform communication end processing (step 25).
0), and the process ends.

By the way, when the transmission of the image data to the terminal B is completed in the above step 236, step 25 is also executed.
After performing the communication termination process at 0, the process is terminated.

As described above, in the sixth embodiment, the terminal A
, The block in which the data error has occurred is retransmitted with the specified number N as the upper limit number. Then, if the data error in the above block is not solved even after retransmission is repeated N times, the relay broadcast is stopped.

At the terminal B as one relay station, for example, by executing the control routine of FIG. 3 described in the first embodiment, only the image data of the block without error data is relayed to the terminal station. can do.
That is, it is possible to prevent the image data including the block in which the data A has occurred and the retransmission has been stopped at the terminal A from being relayed to the terminal station as in the invention of the eighth aspect.

[Seventh Embodiment] Next, a seventh embodiment according to the present invention will be described.
An embodiment will be described. The seventh embodiment corresponds to the ninth aspect of the present invention, in which a terminal B as a relay station controls a command response when a data error occurs during execution of G3 facsimile communication which is not an ECM procedure with a terminal A. Here is an example. The configuration of the communication terminal device according to the seventh embodiment is the same as the configuration of the communication terminal device according to the first embodiment, and a description thereof will not be repeated.

Hereinafter, terminal B as a relay station will be described with reference to FIG.
Will be described. In the terminal B, the control routine of FIG.
Execution is started by U12. Step 272 in FIG.
Then, a flag F1 for indicating whether or not error data has been detected is initialized to "0", and image data is received from the terminal A in blocks in the next step 274.

In the next step 276, it is determined whether or not one page of image data has been received. If one page has not been received yet, the flow proceeds to step 278 to determine whether or not error data has been detected. I do. Here, only when error data is detected, the process proceeds to step 280, and the flag F1 is set.
Is set to “1” and the process returns to step 276. If no error data is detected, the process immediately returns to step 276.

When the reception of one page of image data is completed,
An affirmative determination is made in step 276, and the flow advances to step 282. At this time, the flag F1 is set to “1” when there is error data in one page of image data, and remains “0” when there is no error data.

At the next step 282, the value of the flag F1 is checked. If the flag F1 is "0", it can be determined that there is no error data in the received page data. , To terminal A M
Send CF signal.

On the other hand, if the flag F1 is not "0"("1") in step 282, it can be determined that there is error data in the received page data. Send a signal.

Thereafter, the processes of steps 274 to 286 are executed for each page data sequentially received from the terminal A. Then, when the execution is completed for all the page data, a communication end process is performed in step 290, and the process ends.

As described above, the terminal B checks the presence or absence of error data of each received page data, and if any error data is included, sends an RTN signal to the terminal A, thereby transmitting the terminal A Then, it is determined that a data error has occurred in the transmitted page data and the error rate is higher than an allowable value.For example, retransmitting the page data including the error data, or stopping the transmission of the page data and the execution of the relay broadcast. It is possible to respond to an error such as an error.

In the terminal B, for example, the first
By executing the control routine of FIG. 3 described in the embodiment, only page data of a block without error data can be relayed to the terminal station. This allows
As in the tenth aspect, it is possible to prevent the page data containing any error data from being relayed to the terminal station.

[0129]

According to the present invention, since a page containing error data is not broadcasted to the terminal station, the terminal station is prevented from outputting an unreadable document or causing an abnormal operation. Can be. Further, since there is no need to retransmit data from the relay station to the terminal station as in the related art, it is possible to reduce the overall communication time and communication cost of relay broadcasting.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a schematic configuration of a communication terminal device according to each embodiment.

FIG. 2 is a diagram for explaining relay broadcasting.

FIG. 3 is a flowchart illustrating a control routine executed by a terminal B in the first embodiment.

FIG. 4 is a flowchart showing a control routine executed by a terminal B in a second embodiment.

FIG. 5 is a flowchart showing a control routine executed by a terminal B in a third embodiment.

FIG. 6 is a flowchart illustrating a control routine executed by a terminal A in a fourth embodiment.

FIG. 7 is a flowchart illustrating a control routine executed by a terminal B in a fifth embodiment.

FIG. 8 is a flowchart illustrating a control routine executed by a terminal A in a sixth embodiment.

FIG. 9 is a flowchart illustrating a control routine executed by a terminal B in a seventh embodiment.

FIG. 10 is a diagram for explaining a G3 function.

[Explanation of symbols]

 Reference Signs List 10 communication terminal device 10A terminal A (relay instruction station) 10B terminal B (relay station) 10C terminal C (terminal station) 10D terminal D (terminal station) 10E terminal E (terminal station) 12 CPU 32 second RAM

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI H04M 11/00 303 H04L 11/18 H04N 1/00 104 13/00 311

Claims (10)

[Claims] 1. A relay station that receives data in page units from a communication terminal device as a relay instruction station and relays and broadcasts the data to a communication terminal device as a terminal station based on an instruction from the relay instruction station. A communication terminal device, wherein the determination unit determines whether the received data in page units includes error data in page units, and based on a determination result by the determination unit, does not include error data. A communication terminal device, comprising: relay broadcast control means for controlling to relay only page data. 2. A relay station that receives data in page units from a communication terminal device as a relay instruction station and relays and broadcasts the data to a communication terminal device as a terminal station based on an instruction from the relay instruction station. A communication terminal device comprising: a determination unit that determines, in a page unit, whether the received data in a page unit includes error data; and one page including the error data in the determination result by the determination unit. However, if present, a communication terminal device comprising: an execution prohibition unit for prohibiting the execution of relay broadcasting. 3. A relay station that receives data in page units from a communication terminal device as a relay instruction station and relays the data to a communication terminal device as a terminal station based on an instruction from the relay instruction station. A determination unit that determines whether or not the received data in page units includes error data, and there is a page that includes error data in the determination result by the determination unit. In the case, when retransmission data receiving means for receiving data retransmitted from the relay instruction station, and data retransmitted from the relay instruction station, a page containing error data is lost within a predetermined time limit And a retransmission waiting control means for controlling to start the relay broadcast from the time when the communication terminal disappears. 4. The retransmission wait control means, if no page containing error data remains within the time limit, relays only data of a page not containing error data when the time limit expires. The communication terminal device according to claim 3, wherein the communication terminal device controls the communication terminal device. 5. Dividing data in page units into blocks each having a data amount smaller than one page, transmitting the data to the communication terminal device as a relay station in block units, and transmitting the data to the communication terminal device as a terminal station. A relay instruction station that instructs the relay station to relay and broadcast the data, and the relay station determines that the transmitted block includes error data and requests retransmission of the block. A communication terminal device having an error correction function (ECM function) for retransmitting the block to the relay station, and determining whether the relay station has the ECM function and is in a state capable of executing the ECM function. Function determining means for determining, and as a result of the determination, when the relay station does not have the ECM function or is not in a state in which the ECM function can be executed, Communication terminal device having a broadcast instruction inhibition means for inhibiting indication of relay broadcast. 6. A communication terminal as a terminal station, receiving data in page units from a communication terminal apparatus as a relay instruction station in block units having a data amount smaller than one page, and based on an instruction from the relay instruction station. A relay station that relays and broadcasts the data to the device, and determines whether the received block includes error data, and if the block includes error data, retransmits the block to the relay instruction; A communication terminal device having an error correction function (ECM function) for requesting a station and correcting a data error by a block not including retransmitted error data, wherein a relay instruction station has said ECM function and said ECM Function determining means for determining whether or not the function is executable; and as a result of the determination, the relay instruction station does not have the ECM function. If there is no the ECM function in an executable state, the communication terminal having, an instruction rejecting means for rejecting the instruction for relaying broadcast from the relay instruction station apparatus. 7. The page-based data is divided into blocks each having a data amount smaller than one page, and the data is transmitted to the communication terminal device as a relay station in the block unit and to the communication terminal device as a terminal station. A relay instruction station that instructs the relay station to relay the data, and when the relay station determines that the transmitted block includes error data and requests retransmission of the block. A communication terminal device having an error correction function (ECM function) for retransmitting the block to a relay station, wherein the block is retransmitted while performing the relay broadcast by the ECM function with the relay station. Counting means for counting the number of times for each block; and if the data error of the block is not solved even if the number of retransmissions reaches a predetermined limit, the relay station Communication terminal device having a relay broadcast stop means to stop the relay broadcast of. 8. A communication terminal as a terminal station receiving data in page units from a communication terminal device as a relay instruction station in a block unit having a data amount smaller than one page, and based on an instruction from the relay instruction station. A relay station that relays and broadcasts the data to the device, and determines whether the received block includes error data, and if the block includes error data, retransmits the block to the relay instruction; A communication terminal device having an error correction function (ECM function) for requesting a station and correcting a data error by using a block not including retransmitted error data, wherein the communication terminal apparatus uses the ECM function to communicate with the relay instruction station. If the retransmission of a block is started by the relay indicating station while performing the relay broadcast, and then the retransmission of the block is stopped by the relay indicating station, Retransmission communication terminal device having a prohibiting means for prohibiting the relay broadcast of a page that contains the block has been aborted. 9. A relay station that receives data in page units from a communication terminal device as a relay instruction station and relays the data to a communication terminal device as a terminal station based on an instruction from the relay instruction station. If the received data does not contain error data, a message confirmation signal (MCF signal) is sent. If the received data contains error data and the ratio of error data to the received data (error rate) is Sending a retraining positive signal (RTP signal) when the error rate is equal to or less than a predetermined allowable value, and a retraining negative signal (RTN signal) when the error rate is higher than the predetermined allowable value for each page to the relay instruction station; A communication terminal device having a function of executing a so-called G3 procedure including: performing relay broadcasting by the G3 procedure with the relay instruction station. A signal transmission control means for controlling the transmission of an RTN signal to a relay instruction station by changing the predetermined allowable value to 0 at the time of transmission and when the received data contains any error data. Communication terminal device. 10. The communication terminal device according to claim 9, further comprising a relay broadcast prohibition unit for prohibiting a relay broadcast of a page including the error data.