JPH10178494A - Communication terminal equipment, communication system and communication control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To send lots of data and to realize smooth data transmission even in the case of the communication terminal equipment whose consecutive communication time is limited less than a prescribed limit time. SOLUTION: When there is a time limit relating to a consecutive communication time in a connected communication network (in the case of affirmative discrimination in a step 120A), a data amount to be sent is calculated (step 122A), a transmission time of transmission data is calculated base on a transfer speed of image information and a data size of an original and the calculated transmission time and is compared with the specified limit time (step 123). When the transmission time exceeds a limit time, it is discriminated that data conversion is required for the transmission data (affirmative discrimination in step 125), and data conversion is conducted for transmission data so that the transmission time is set within the limit time (step 127). Then data after data conversion are transmitted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication terminal, a communication system, and a communication control method, and more particularly, to a communication terminal in which continuous communication time with another communication terminal is restricted to a predetermined time or less. The present invention relates to an apparatus, a communication system including a plurality of communication terminal apparatuses including a communication terminal apparatus having the above-described restrictions, and a communication control method in the above-described communication system.

[0002]

2. Description of the Related Art One of the mobile communication systems, PHS (Pe
rsonal Handyphone System) service has started, and the number of users (subscribers) has been increasing in recent years. This PH
In S, when the communication between the slave units is performed, if the transmission continues for 3 minutes, the transmission must be stopped unconditionally.
Is provided.

[0003] Also, MCA used in taxi radios and the like.
Also in communication, the continuous communication time is limited to a maximum of one minute.

[0004] These restrictions are provided for the purpose of preventing a finite small number of radio channels from being monopolized by a specific user and effectively using the channels.

[0005] If the restriction on the continuous communication time is provided as described above, for example, PHS cannot perform continuous data transmission for three minutes or more. It was necessary to take measures such as transmitting data several times. For this reason, there is a problem that the processing becomes very complicated and a large amount of time is spent until the target data transmission is completed.

In the case where a document of one page requires a communication time of three minutes or more (a complicated document such as a photograph), it is difficult to divide transmission data. In the provided communication network, there is a big problem that it is difficult to perform data transmission itself.

A communication control technique in a communication network in which the continuous communication time is restricted is disclosed in Japanese Patent Application Laid-Open Nos. 59-18645, 63-86670, and 1-243777.
However, these technologies are all related to wireless communication and need to transmit and receive special signals. For other communication networks (for example, PHS and MCA communication), There is a drawback that similar processing cannot be performed. Also, JP-A-5-300282 discloses that
Techniques have been proposed to limit the length of a document that can be transmitted in advance, but even if the length of the document is limited, the communication time fluctuates due to factors such as the communication speed and the image density of the document. It is not very effective for the purpose of completing communication.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and is intended to transmit a large amount of data even when the continuous communication time with another communication terminal device is limited. It is an object of the present invention to provide a communication terminal device, a communication system, and a communication control method capable of realizing communication and realizing smooth data transmission.

[0009]

According to one aspect of the present invention, there is provided a communication terminal device wherein a continuous communication time with another communication terminal device is limited to a predetermined time limit or less. Setting means for setting the maximum amount of data that can be transmitted within the time limit based on the time limit and the amount of data to be transmitted, and transmitting the data of the data amount set by the setting means Control means for performing such control.

Further, in the communication terminal device according to the present invention,
2. The communication terminal device according to claim 1, wherein, when the time limit has elapsed, the control unit temporarily suspends communication with another communication terminal device, and then reconnects to the other communication terminal device to suspend the communication. The transmission is restarted from the data immediately after the transmission.

According to a third aspect of the present invention, there is provided a communication terminal device in which a continuous communication time with another communication terminal device is limited to a predetermined time limit or less, and wherein all data to be transmitted is the same as the communication terminal device. Data transmission means for performing data conversion on the data to be transmitted so as to be transmitted within the time limit, and transmission means for transmitting the data subjected to the data conversion are provided.

A communication terminal device according to a fourth aspect of the present invention is a communication terminal device in which continuous communication time with another communication terminal device is limited to a predetermined time limit or less, and prior to starting data transmission. Determining means for determining whether transmission of data to be transmitted is completed within the time limit; and notifying means for notifying that transmission is not completed when transmission of data to be transmitted is not completed within the time limit. , Is characterized by having.

According to a fifth aspect of the present invention, in the communication terminal device of the fourth aspect, when the data to be transmitted is not completely transmitted within the time limit, the prohibition means for prohibiting data transmission is provided. It is further characterized by having.

According to a sixth aspect of the present invention, in the communication terminal device of the fourth aspect, if the transmission of the data to be transmitted is not completed within the time limit, whether or not to transmit the data is determined. There is further provided a selection unit for selecting, wherein the control unit determines whether or not to transmit data based on a selection result by the selection unit.

Further, in the communication terminal device according to the present invention,
7. The communication terminal device according to claim 6, wherein the control means, when selected by the selection means within a predetermined time, determines whether or not to transmit data based on a result of the selection, If the selection is not made within the set time, the data transmission is controlled to be stopped.

In the communication terminal device according to the present invention,
7. The communication terminal device according to claim 6, wherein the control means, when selected by the selection means within a predetermined time, determines whether or not to transmit data based on a result of the selection, If it is not selected within the specified time, data transmission is controlled based on a procedure specified in advance.

Further, in the communication terminal device according to the ninth aspect,
7. The communication terminal device according to claim 6, wherein, when it is selected to transmit the data, the selection unit transmits data of a maximum data amount that can be transmitted up to the time limit and ends, or the time limit. After transmitting the maximum amount of data that can be transmitted up to and then interrupting, then reconnect and control to retransmit from the data immediately after the interruption, or after converting the data so that all data is transmitted within the time limit , Or data transmission, and the control means controls data transmission based on the selected procedure.

In the communication terminal device according to a tenth aspect, in the communication terminal device according to the fourth aspect, the notification means transmits the data within the time limit while executing data transmission that is not completed within the time limit. Informing that data transmission that is not completed is being executed.

Further, the communication terminal device according to claim 11 is
A communication terminal device in which continuous communication time with another communication terminal device is limited to a predetermined time limit or less, and while receiving data from another communication terminal device, the other communication terminal device transmits data. Interruption detection means for detecting interruption, reconnection judgment means for judging whether or not the same communication terminal device is reconnected within a predetermined time after data transmission is interrupted, If the same communication terminal is reconnected within the time, the data received before the interruption
Data forming means for forming complete data by adding data received after reconnection.

Further, the communication terminal device according to claim 12 is:
A communication terminal device in which continuous communication time with another communication terminal device is limited to a predetermined time limit or less, wherein the own terminal is limited in continuous communication time with another communication terminal device to a predetermined time limit or less. A communication terminal device for notifying the other terminal before the start of communication that the communication terminal device is a communication terminal device.

According to a thirteenth aspect of the present invention, in the communication terminal device according to any one of the first to twelfth aspects of the present invention, the communication terminal device has a communication time between the communication terminal devices. It is characterized by being connected to a communication network for which a time limit is set in advance.

According to a fourteenth aspect of the present invention, in the communication terminal device according to any one of the first to twelfth aspects, the communication terminal device is connected to the other communication terminal device itself. The time limit is set in the continuous communication time with the communication terminal device.

Further, the communication system according to claim 15 is:
A communication system comprising a plurality of communication terminal devices including a communication terminal device in which continuous communication time with another communication terminal device is limited to a predetermined time or less, wherein the communication terminal in which the continuous communication time is limited. Prior to receiving data from another communication terminal device, the device notifies the other terminal that the continuous communication time with the other communication terminal device has been limited to a predetermined time limit or less. Notify the communication terminal device,
The notified other communication terminal device transmits the data of the maximum data amount that can be transmitted until the time limit and ends, or temporarily interrupts the transmission of the data amount of the maximum data amount that can be transmitted until the time limit, Either control to retransmit from the data immediately after the reconnection and interruption, or perform data conversion so that transmission of all data is completed within the time limit, and then transmit the data. , Characterized in that.

The communication control method according to claim 16 is
A communication control method in a communication system including a plurality of communication terminal devices including a communication terminal device in which a continuous communication time with another communication terminal device is limited to a predetermined time limit or less. Prior to transmitting data to the communication terminal device having the limited continuous communication time, the communication terminal device having the limited continuous communication time may be configured such that its own terminal has a predetermined limit for the continuous communication time with another communication terminal device. Notify the other communication terminal device that the communication terminal device is limited to the time or less, and the notified other communication terminal device transmits data of the maximum data amount that can be transmitted up to the time limit and ends. Alternatively, after transmitting the maximum amount of data that can be transmitted up to the time limit and temporarily interrupting the data, reconnect and control to retransmit from the data immediately after the interruption, or complete the transmission of all data within the time limit After urchin data conversion, to send the data, to selectively perform any of steps of, characterized in that.

In the communication terminal device according to the first aspect, the continuous communication time with another communication terminal device is limited to a predetermined time limit or less.

The communication terminal device having the continuous communication time limited as described above is connected to a communication network in which the continuous communication time between the communication terminal devices is set to a time limit in advance. A communication terminal device in which a time limit for continuous communication time is set for itself as described in claim 14 can be applied.

In the communication terminal device according to the first aspect of the present invention, the maximum data amount that can be transmitted within the time limit is set by the setting means based on the time limit and the amount of data to be transmitted. The control means controls to transmit data of the data amount. As a result, even a communication terminal device with a limited continuous communication time can transmit the maximum amount of data that can be transmitted within the time limit.

Further, since the data amount to be transmitted here is a data amount set by the user, the data amount to be transmitted out of the total data amount to be transmitted can be managed by itself. It is possible to perform retransmission control of untransmitted data as described above.

For example, in a communication terminal device that transmits data to be transmitted in units of 256-byte frames, the maximum number of frames that can be transmitted within the time limit is set.
Control to transmit data of the set maximum number of frames. When setting the maximum amount of data that can be transmitted within the time limit as described above, it is desirable to set the maximum amount of data that can be transmitted in a unit of data transmission in the communication terminal device (at a well-cut point).

More specifically, in a communication terminal device that executes an ECM (Error Correction Mode) procedure in the G3 protocol, the data transfer size is as follows.
One page includes a plurality of blocks, one block includes a maximum of 256 frames, and one frame includes 256 frames.
Consists of bytes.

For example, one page of transmission data is 100 k
If it is a byte, 400 frames (100 × 1
024/256), the transmission data is 2 blocks (the first block is 256 frames, the second block is 14 frames).
4 frames). At this time, the communication time per page is determined by the data (image information) transfer rate of 144.
If it was 00 BPS, then 100 × 1024 × 8/1
4400 = 56.9 (seconds) data transfer time is required, but in actuality, about 60 seconds are required due to the above-mentioned data of the frame header portion and additional information such as a flag for HDLC. become.

Also, about 12 seconds are required for the pre-procedure of the G3 protocol, about 2 seconds between blocks (divided into two blocks as described above) and between pages, and about 3 seconds for the post-procedure. (That is, besides the time to transfer the actual image information,
Approximately 17 seconds are required to perform the protocol procedure.) Therefore, conventionally, when performing communication in a system such as MCA communication in which the communication time is limited to one minute, even one page cannot be transmitted. When communication is performed in a system in which the communication time is limited to three minutes, such as communication between handset units of the PHS, the communication is interrupted during the communication of the third page (during the communication of the first block of the third page). Will occur.

On the other hand, according to the first aspect of the present invention, when communication is performed in a system with a time limit of one minute, one block (256 frames) is set as the maximum data amount that can be transmitted with good cutting, and one block (256 frames) is set. The communication may be terminated when the transmission of the eyes is completed. Alternatively, the number of frames up to a frame with a good separation in the second block may be set as the maximum amount of data that can be transmitted with a good cut, and the communication may be terminated when the transmission to the frame with a good separation is completed.

When communication is performed in a system with a time limit of three minutes, the number of frames for two pages is set as the maximum amount of data that can be transmitted with good cutting, and communication is completed when transmission of the second page is completed. You may end. Also, the number of frames up to the frame of the first block of the third page up to the frame with a good separation is set as the maximum data amount that can be transmitted with a good cut, and the communication is terminated when the transmission to the frame with the good separation is completed. good.

The remaining data after the interruption of the communication is transmitted according to the second aspect of the present invention.

By the way, it is necessary to set in the communication terminal device whether or not there is a restriction on the continuous communication time, and if there is a restriction, how long is the time limit. Such information is determined and set by the operator when the communication terminal device is installed. The communication terminal device determines a time constraint based on the set information.

In recent years, a plurality of lines (including wireless) have been used.
A multi-channel compatible communication terminal device that can connect to a PC has been used. In such a communication terminal device, it is necessary to perform the above setting for each line.

Next, according to the second aspect of the invention, in the communication terminal device according to the first aspect, when the time limit has elapsed, communication with another communication terminal device is temporarily interrupted. Thereafter, the communication terminal is reconnected to the other communication terminal device, and the transmission is restarted from the data immediately after the interruption, that is, the data next to the data whose transmission has been completed (for example, the frame next to the number of frames whose transmission has been completed). As a result, even when transmitting a large amount of data that is not completed within the time limit, the data can be transmitted in a plurality of times, and a large amount of data can be transmitted.

In order to transmit a large amount of data, a communication terminal device according to a third aspect of the present invention includes a data conversion unit and a transmission unit, and all data to be transmitted are transmitted within a time limit. As described above, data conversion may be performed on the transmission data by the data conversion unit, and the converted data may be transmitted by the transmission unit.

Further, in the communication terminal device according to the fourth aspect,
Prior to starting transmission of data, the determination unit determines whether or not transmission of data to be transmitted is completed within a time limit, and if the data is not completed within the time limit, a notification unit that the transmission is not completed. Informs the operator. Thereby, the operator can recognize that the data transmission is not completed within the time limit. In addition, as a notification means, display of a message on a display or the like,
Voice messages, alarm tones,
Any of output of a message to a communication management report or the like may be adopted, and a plurality of the above may be combined.

If the data transmission is not completed within the time limit, the data transmission may be prohibited by the prohibiting means according to the invention of claim 5, or the selecting means as in the invention of claim 6 May be provided, and the operator may select whether or not to transmit data by the selection means, and determine whether or not to transmit data based on the selection result.

When the operator selects whether or not to transmit data, a time limit for the selection operation may be defined in advance. In this case, if the data is selected by the selection means within a predetermined time as in the invention according to claim 7, whether or not to transmit data is determined based on the selection result, and the data is transmitted within the predetermined time. Otherwise, control may be performed to stop data transmission. Further, when the data is selected by the selection means within a predetermined time as in the invention according to claim 8, it is determined whether or not to transmit data based on the selection result, and within a predetermined time. If not selected, data transmission may be controlled based on a predetermined procedure.

The selecting means transmits the data of the maximum data amount (for example, the maximum number of frames) which can be transmitted until the time limit when the data transmission is selected. To stop or send the maximum amount of data that can be sent up to the time limit and then temporarily suspend and then reconnect and control to retransmit from the data immediately after the interruption, or send all data within the time limit After the data is converted so as to be completed, data may be transmitted, or any one of the three procedures may be selected.

Here, by controlling the data transmission based on the selection result, the communication terminal apparatus transmits the maximum amount of data that can be transmitted up to the time limit and finishes the transmission, or transmits the data up to the time limit. After transmitting the maximum amount of data and then temporarily interrupting, reconnect and control to retransmit from the data immediately after the interruption, or convert the data so that transmission of all data is completed within the time limit, and then transmit the data Or one of the procedures can be selectively executed.

As described in claim 10, while the data transmission is not being completed within the time limit, the notification means is executing the data transmission that is not completed within the time limit. Is desirably notified to the operator. Thereby, the operator can recognize that the data transmission that is not completed within the time limit is being executed, and can prepare for the response after the time limit has elapsed.

In the above description, the communication terminal device on the transmitting side has been described.
The invention described in 1 can be applied. In the communication terminal device according to the eleventh aspect, another communication terminal device (originating terminal)
During reception of data from the communication terminal device, the interruption detecting means detects that the other communication terminal device has interrupted the data transmission, and is reconnected from the same communication terminal device within a predetermined time from the time of the detection. It is determined by the reconnection determination means whether or not this is the case.

Here, when the same communication terminal device is reconnected within the specified time, the data formed by adding the data received after the reconnection to the data received before the interruption by the data forming means. Form the data.

Accordingly, when receiving a large amount of data that cannot be transmitted within the time limit, even if the large amount of data is divided into a plurality of data amounts that can be transmitted within the time limit and transmitted. By merging the divided data, a large amount of original data can be completely restored. Therefore, even a large amount of data that cannot be completely transmitted within the time limit can be reliably received.

[0049] Regardless of whether the own terminal is the transmitting terminal or the receiving terminal, the own terminal can continuously communicate with another communication terminal device as in the communication terminal device according to the twelfth aspect. In the case of a communication terminal device whose time has been limited to a predetermined time limit or less, it is desirable to notify the communication terminal device to that effect by a notification unit before starting communication. Thereby, the partner terminal can recognize before the start of data transmission / reception that the communication terminal device of the transmission destination or the reception destination is a communication terminal device in which the continuous communication time is limited to the predetermined time limit or less. For example, it is possible to take measures such as data conversion and transmission of transmission data so as to be within the time limit.

Further, in the communication system according to the fifteenth aspect, the communication terminal device whose continuous communication time is restricted, before receiving data from another communication terminal device, sets its own terminal to:
The communication terminal device notifies the other communication terminal device that the continuous communication time with the other communication terminal device is limited to a predetermined time or less. The other communication terminal devices that have received this notification transmit data of the maximum data amount that can be transmitted up to the time limit and terminate, or temporarily transmit and transmit data of the maximum data amount that can be transmitted up to the time limit. Then, either reconnect and control to retransmit from the data immediately after the interruption, or convert the data so that transmission of all data is completed within the time limit, and then transmit the data. Run.

Similarly, in the communication control method according to the sixteenth aspect, in a communication system including a communication terminal device whose continuous communication time with another communication terminal device is limited to a predetermined time limit or less, Prior to transmitting data from another communication terminal device to a communication terminal device having a limited continuous communication time, the communication terminal device having a limited continuous communication time requires that its own terminal has a continuous communication time with another communication terminal device. Is notified to the other communication terminal device that the communication terminal device is restricted to a predetermined time limit or less. The other communication terminal devices that have received this notification transmit data of the maximum data amount that can be transmitted up to the time limit and terminate, or temporarily transmit and transmit data of the maximum data amount that can be transmitted up to the time limit. Then, either reconnect and control to retransmit from the data immediately after the interruption, or convert the data so that transmission of all data is completed within the time limit, and then transmit the data. Run.

According to the communication system described in claim 15 or the communication control method described in claim 16, in a communication system including a communication terminal device in which continuous communication time with another communication terminal device is limited. In the terminal which is a communication partner of the communication terminal device whose continuous communication time is limited,
Before the start of data transmission, it is possible to recognize that the partner terminal is a terminal whose continuous communication time is limited, and it is possible to selectively execute appropriate processing.

As the communication terminal device, any communication terminal device in which the continuous communication time with another communication terminal device is limited to a predetermined time limit or less, such as a facsimile device and a telephone, can be applied.

[0054]

BEST MODE FOR CARRYING OUT THE INVENTION

[First Embodiment] A first embodiment corresponding to the first and second aspects of the present invention will be described below.

[Configuration of Communication Terminal] First, the configuration of the communication terminal of the first embodiment will be described. FIG. 1 shows a block diagram of a communication terminal device 10 of the present embodiment. The CPU 12 shown in FIG. 1 controls the entire communication terminal device 10, and the CPU 12 has a ROM 14 and a CP.
First RAM 1 as working memory for processing by U12
6 are connected. Of these, the ROM 14 contains the CPU 1
Various control programs to be executed in Step 2 are stored, and control information and various data used by the control programs are temporarily stored in the first RAM 16.

The CPU 12 has an RTC (Real Tim
e Clock) 18, keyboard 20 and display 22
Are connected respectively. The CPU 12 has an RTC 18
Recognizes the current time from the built-in clock. Also, CPU
12 detects the state of the keyboard 20 to recognize the operator's instruction, and can use the display 22 to display various information for the operator.

Further, the CPU 12 has a scanner 24,
Third RAM 26, printer 28, encoding / decoding device 3
0, second RAM 32, modem 34 and network controller (NC
U) 36 is 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 these scanners 2
4. Control signals are transmitted to the third RAM 26, the printer 28, the encoding / decoding device 30, the second 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 the read image data of the 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 encoded image data stored in the second RAM 32 is transmitted to the communication network 38 via the modem 34 and the NCU 36.

Conversely, image data transmitted from an external device via the communication network 38 is transmitted to the NCU 36 and the modem 3
4 is stored in the second RAM 32. This second RA
The image data stored in the M32 is decoded by the decoding function of the encoding / decoding device 30 and the third RAM 26
Is stored.

Incidentally, the communication network 38 used by the communication terminal device 10 is a communication system such as a PHS communication system or an MCA communication system, which has a limitation on continuous communication time.

[General Communication Operation Sequence Between Transmitter and Receiver] Next, referring to FIG. 2, a general communication operation between the transmitter and the receiver executed in the communication terminal device of the present embodiment will be described. Outline the sequence. FIG. 2 shows a communication operation sequence diagram when a document of one page (two blocks) is communicated.

When the transmitter dials, the exchange transmits a calling signal to the receiver (a). When the receiver accepts the incoming call, it sends NSF (non-standard function identification signal), CSI (called terminal identification signal), and DIS (digital identification signal) following transmission (b) of CED (called station identification signal). (C).

On the other hand, the transmitter transmits NSS (non-standard function setting signal) or DCS (digital command signal) and TSI (transmission terminal identification signal) (d), and then transmits a training signal (e).

If the training of the modem is normal to the TCF (training check signal),
A CFR (reception preparation confirmation signal) is transmitted (f).

Upon receiving the CFR, one of the transmitters starts transmission of image information (h) following transmission of the training (g). In the ECM procedure, image information data is divided into a plurality of frames, and when there is a data amount of 256 frames or more, block division is performed, and PPS-NUL
L (partial page signal) is transmitted (i).

On the other hand, the receiver receives the image information data, and if there is no abnormality in the received image information data, the MCF
(Message confirmation signal) is transmitted (j).

When the data to be transmitted covers a plurality of blocks, the transmitter similarly transmits the image information data (k). Then, when transmission of all image information data is completed, the transmitter transmits PPS-EOP (procedure end signal) (l).

On the other hand, the receiver receives the image information data, and if there is no abnormality in the received image information data, the MCF
(Message confirmation signal) is transmitted (m).

Upon receiving the MCF, the transmitter transmits a DCN (disconnection command signal) (n) and releases the line.

[Operation of First Embodiment] Next, the operation of the first embodiment will be described. Here, using FIGS.
A process in the communication terminal device 10 as the transmitting terminal will be described.

First, after a line is connected and dialing is performed to the other party (receiving side) (step 102 in FIG. 4), a response from the other party is waited for (step 104). Although not described here, strictly speaking, a timer is set, a response is waited until the timer expires, and if a timeout occurs, communication is terminated (line is released).

If there is a CED response from the partner machine, then N
SF, CSI, DIS received, NSF, CS received
I and DIS are analyzed (step 106).

Next, the restart transmission information (whether or not the communication of the document which has been interrupted and restarted) and the information of the page number, block number and frame number of the restarted document are added to the NSS, and the NSS is added. It is created (step 108). In addition,
If this is the first communication (if not the interrupted communication), the page number, block number, and frame number are all 0. At the same time, a TSI is created. Then, the created NSS and TSI are transmitted (step 110).

Next, a training and TCF signal is transmitted to the partner machine (step 112), and a response is waited for (step 114). Although not described here, strictly speaking,
Set a timer, wait for a response until the timer expires, and terminate the communication (release the line) if a timeout occurs.

If a response is received from the partner device but the response is, for example, FTT (failure in training) and not CFR, the process returns to step 110 to retry transmission of NSS and TSI. Even if the transmission of the NSS and TSI is retried up to the specified number of times, no CFR is received (step 11).
In the case of a negative determination in step 8), the communication is terminated (line released).
(Step 166 in FIG. 5).

On the other hand, the CFR is received (step 116).
If the result is affirmative, the internal memory (set in advance) determines whether there is a time constraint on the line on which the communication is made.
(Step 120). Here, if there is no time constraint on the line, the process proceeds to step 142 in FIG. 5 described below, and normal communication is executed.

On the other hand, if there is a time constraint on the line, the amount of data to be transmitted is calculated (step 122), and based on the transfer speed of the image information determined by the reception of the CFR and the calculated transmission data amount. Then, the transmission time of the transmission data is calculated (step 124). Next, the time limit is read from the internal memory, and the maximum amount of data (the number of frames) that can be transmitted within the time limit is determined as described above based on the read time limit and the calculated transmission time (step). 126). Here, if the amount of data to be transmitted is the amount of data that can be transmitted within the time limit, normal communication is executed; otherwise, the maximum amount of data (the number of frames) that can be transmitted within the time limit is determined. I do.

Next, the subsequent processing will be described with reference to FIG. Following the training, transmission of image information data is started. The image information data is created and transmitted in units of 256-byte frames (step 142 in FIG. 5). When the data transmission of one frame is completed, it is determined whether the transmission of the image information data for one page is completed (step 14).
4).

If the transmission of the image information data for one page has not been completed yet, it is determined whether or not the transmission is to be interrupted. Is determined) (step 146). If interrupted, the page number, block number, and frame number that have been transmitted at that time are stored (step 161), and then a PPS-EOP is created and transmitted (step 162, sequence 11 in FIG. 3). Here,
Information indicating that communication is to be interrupted due to a time constraint is added to the PPS-EOP and transmitted. Thereby, the receiving side can recognize that the communication has been interrupted. Then, after waiting for a response from the receiver (step 164), the communication is terminated (line is released) (step 166, sequence n1 in FIG. 3). On the other hand, if not interrupted in step 146, 1
It is determined whether the transmission of all frames in one block has been completed (step 148). If the transmission of all frames in one block has not been completed, the process returns to step 142 to transmit the next frame. When transmission of all frames in one block is completed, a PPS-NULL is created and transmitted (step 150), and after waiting for a response from the receiver (step 152), the flow returns to step 142 to return to the next block. Continue sending information data.

On the other hand, at step 144, the image information data
If the transmission has been completed for the pages, it is determined whether or not the transmitted page is the last page (step 154). If the page whose transmission has been completed is not the last page, it is determined whether or not the transmission is to be interrupted (in the previous size determination, if interrupted in advance, it is determined whether or not the size has been reached) (step 156). ). Here, if the transmission is not interrupted, a PPS-MPS is created and transmitted (step 15).
8) Waiting for a response from the receiver (step 160)
Thereafter, the flow returns to step 142 to transmit the image information data of the next page.

On the other hand, if the transmission is interrupted at step 156, the page number, block number, and frame number of the transmission completed at that time are stored (step 161).
Thereafter, a PPS-EOP is created and transmitted (step 16).
2. Sequence 11 in FIG. Here, the PPS
-Transmit EOP with information indicating that communication is interrupted due to time constraints. Thereby, the receiving side can recognize that the communication has been interrupted. Then, after waiting for a response from the receiver (step 164), the communication is terminated (line is released) (step 166, sequence n in FIG. 3).
1).

If the page that has been transmitted in step 154 is the last page, a PPS-EOP is created and transmitted (step 162), and after waiting for a response from the receiver (step 164), communication is terminated (step 164). The line is released) (step 166).

Thereafter, step 146 or step 1
In the case where it is determined at 56 that transmission is to be interrupted, data transmission is restarted to transmit untransmitted data (sequence a2 in FIG. 3). In this case, in step 161, the page number that has been transmitted at the time of interruption,
Since the block number and the frame number are stored, when the data transmission is restarted, the page number, the block number and the frame number at the time of the interruption at the steps 108 and 110 are notified to the receiving terminal by the NSS (FIG. 3 sequence d2).

In the first embodiment described above, the maximum number of frames that can be transmitted within the time limit is set in the transmitting terminal having a restriction on the continuous communication time, and the data of the set number of frames is transmitted. Control. As a result, even a communication terminal device with a limited continuous communication time can transmit data of the maximum number of frames that can be transmitted within the time limit.

When the transmission of the data of the set number of frames is completed, the communication is temporarily interrupted, and then reconnected to transmit the untransmitted data. As a result, even when transmitting a large amount of data that is not completed within the time limit, the data can be transmitted in a plurality of times, and a large amount of data can be transmitted.

[Second Embodiment] A second embodiment corresponding to the eleventh aspect of the present invention will be described below. 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 (see FIG. 1).
Therefore, the description is omitted.

Next, the operation of the second embodiment will be described.
Here, the processing in the communication terminal device 10 serving as the receiving terminal will be described with reference to FIG.

If there is an incoming call (if affirmative determination is made in step 202), a CED signal is transmitted after connecting the line (step 204). In addition, NSF, CSI, DIS
Is created and transmitted (step 206). Here, since the communication terminal device 10 of the second embodiment uses a system in which the continuous communication time is restricted, information indicating that the continuous communication time is restricted and information on the time limit is added to the NSF.

Then, the response from the partner machine (transmitter) is
Wait for a predetermined waiting time (steps 208 and 21)
0), if timeout occurs, the above NSF, CSI, D
The IS is retransmitted (step 212). Further, it waits for a response from the partner device for a predetermined waiting time (steps 214 and 216), and when the timeout occurs again, ends the reception (step 230).

On the other hand, if a response from the partner device is received, it is determined whether or not the data reception is continued (step 218). If it is not a continuation of the previous data reception, normal data reception is performed (step 220).

On the other hand, if it is the continuation of the previous data reception, the NSS and TSI are analyzed, and the restart transmission information (whether or not the communication of the suspended and restarted original document) included in the NSS and the page number, Information on a block number and a frame number is obtained (step 222). And training, T
After receiving the CF (step 224), the image information data is received (step 226). Further, based on the information of the page number, block number, and frame number at which data transmission has been resumed, the received image information data is added to the previously received image information data to create a received document (step 228). .

As described above, in the second embodiment, when a large amount of data that cannot be transmitted within the time limit is received by the receiving terminal whose continuous communication time is limited, the large amount of data Even if the transmitted data is divided into a plurality of pieces by the amount of data that can be transmitted in time, the divided pieces of data can be merged to restore the original large amount of data in a complete form. That is, it is possible to reliably receive a large amount of data whose transmission is not completed within the time limit.

In the above-described second embodiment, an example has been described in which the information of the page number, block number, and frame number at which data transmission is resumed is obtained by the NSS from the originating terminal. You may leave it.

[Third Embodiment] A third embodiment according to the third aspect of the present invention will be described below. Note that 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 (see FIG. 1), and a description thereof will be omitted.

Next, the operation of the third embodiment will be described.
Here, the process in the communication terminal device 10 serving as the transmitting terminal will be described with reference to FIG. In the flowchart of FIG. 7, the same processes as those in FIG. 4 have “A” added to the end of the step numbers.

Training is performed in step 112A of FIG.
When the CFR is received after transmitting the TCF, it is determined from an internal memory (set in advance) whether or not there is a time constraint on a line for performing the communication (step 120A).
Here, if there is no time restriction on the line, the process proceeds to step 142 in FIG. 5 described above, and normal communication is executed.

On the other hand, if there is a time constraint on the line, the amount of data to be transmitted is calculated (step 122A), and the CFR is calculated.
The transmission time of the transmission data is calculated based on the transfer speed of the image information and the data amount of the document determined by the reception, and the calculated transmission time is compared with a predetermined time limit (step 123).

If the transmission time of the transmission data does not exceed the time limit, it is determined that there is no need to perform data conversion on the transmission data (No in step 125), and the data conversion is not performed. Proceeding to step 142 in FIG. 5 described above, normal communication is executed.

On the other hand, if the transmission time of the transmission data exceeds the time limit in the comparison processing in step 123, it is determined that data conversion needs to be performed on the transmission data (YES in step 125), and the transmission is performed. Data conversion is performed on the transmission data so that the time falls within the time limit (step 127).

The following data conversion method is conceivable. (1) Size conversion If the current document size of the image information data is A3, B4
Or A4, or B4 to A4. By reducing the size, the data amount can be reduced.

(2) Image quality conversion If the image quality of the current image information data is 600 PPI, 4
00 PPI or 300 PPI, 400 PPI for 3
Convert to 00PPI. By converting the image quality, the data amount can be reduced.

(3) Encoding conversion If the current encoding method of image information data is MH, MM
Change to R or MR, and if MR, change to MMR. By converting the encoding method, the data amount can be reduced.

(4) Data deletion (missing) Communication is performed by deleting (missing) a part of the current image information data. For example, in the case of A3, only the upper half A4 is transmitted. By deleting the data, the data amount can be reduced.

Note that the above method may be performed independently, or two or more methods may be used at the same time.

The method to be used is determined by the type of the document to be transmitted, the amount of time for the shortage (the amount of data to be reduced), and the intention of the operator (whatever method the data amount is reduced). Good?), Etc., so these factors are taken into consideration when determining.

The converted data after the above-described data conversion is transmitted to the receiving side by the processing after step 142 in FIG.

As described above, in the third embodiment, when the transmission time of the transmission data exceeds the time limit, data transmission is performed on the transmission data so that the transmission time falls within the time limit, and then the data transmission is performed. Therefore, data transmission can be surely completed within the time limit.

[Fourth Embodiment] A fourth embodiment according to the fourth and fifth aspects of the present invention will be described below. Note that 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 (see FIG. 1), and a description thereof will be omitted.

Next, the operation of the fourth embodiment will be described.
Here, the processing in the communication terminal device 10 serving as the transmitting terminal will be described with reference to FIG. In the flowchart of FIG. 8, "A" is added to the end of the step number for the same processing as in FIG.

Training is performed in step 112A of FIG.
When the CFR is received after transmitting the TCF, it is determined from an internal memory (set in advance) whether or not there is a time constraint on a line for performing the communication (step 120A).
Here, if there is no time restriction on the line, the process proceeds to step 142 in FIG. 5 described above, and normal communication is executed.

On the other hand, if the line has a time constraint, the amount of data to be transmitted is calculated (step 122A), and the CFR is calculated.
The transmission time of the transmission data is calculated based on the transfer speed of the image information and the data amount of the document determined by the reception, and the calculated transmission time is compared with a predetermined time limit (step 123A).

Here, if the transmission time of the transmission data does not exceed the time limit, it is determined that the transmission data can be transmitted (YES at step 128), and FIG.
The process proceeds to step 142, where normal communication is executed.

On the other hand, if the transmission time of the transmission data exceeds the time limit in the comparison processing in step 123A, it is determined that the transmission data cannot be transmitted (step 128).
Is negative), and the operator is notified that transmission data cannot be transmitted within the time limit (step 130). Then, the communication ends without transmitting the data.

As described above, in the fourth embodiment, before starting data transmission, it is determined whether or not transmission of data to be transmitted is completed within the time limit, and the transmission of data is not completed within the time limit. In this case, the operator is notified that the transmission is not completed. Thereby, the operator can recognize that the data transmission is not completed within the time limit.

[Fifth Embodiment] Hereinafter, a fifth embodiment corresponding to the inventions of claims 6, 7, 8, 9, and 10 described in the claims will be described. Note that 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 (see FIG. 1), and a description thereof will be omitted.

Next, the operation of the fifth embodiment will be described.
Here, the process in the communication terminal device 10 serving as the transmitting terminal will be described with reference to FIG. In the flowchart of FIG. 9, “A” is added to the end of the step number for the same processing as in FIG. 8.

Training is performed in step 112A of FIG.
When the CFR is received after transmitting the TCF, it is determined from an internal memory (set in advance) whether or not there is a time constraint on a line for performing the communication (step 120A).
Here, if there is no time restriction on the line, the process proceeds to step 142 in FIG. 5 described above, and normal communication is executed.

On the other hand, if there is a time constraint on the line, the amount of data to be transmitted is calculated (step 122A), and the CFR is calculated.
The transmission time of the transmission data is calculated based on the transfer speed of the image information and the data amount of the document determined by the reception, and the calculated transmission time is compared with a predetermined time limit (step 123A).

If the transmission time of the transmission data does not exceed the time limit, it is determined that the transmission data can be transmitted (Yes at step 128A), and the process proceeds to step 142 in FIG. Perform normal communication.

On the other hand, if the transmission time of the transmission data exceeds the time limit in the comparison processing in step 123A, it is determined that the transmission data cannot be transmitted within the time limit (a negative determination is made in step 128A). The operator is notified to select an operation to be executed in the future (step 12).
9).

In the alternatives, as options for continuing communication, for example, an operation of transmitting data of the maximum number of frames that can be transmitted up to the time limit and ending (first option), a maximum of data that can be transmitted up to the time limit The operation of transmitting the data of the number of frames, temporarily interrupting, reconnecting and retransmitting from the data immediately after the interruption (second option), after converting the data so that all the data is transmitted within the time limit, (Third option) and the like, and as an option for not continuing communication, an operation of stopping transmission (a fourth option) and the like can be considered.

However, a time limit is set in advance for the selection here. If the operator does not make a selection within this time limit, a default option set in advance is adopted. In this case, the process proceeds to step 136 in FIG. 9, and it is determined whether the default option is an operation of continuing communication.

Here, the default options are the first,
If the operation is to continue the communication as in the second and third options, the process proceeds to step 142 in FIG. 5 described above, and the communication operation is continued. During the communication operation in this case, it is desirable to notify the operator that data transmission is not being completed within the time limit, for example (display on the display 22).

On the other hand, when the default option is an operation of stopping communication as in the fourth option, the communication is stopped according to the option without transmitting data.

If the operator makes a selection within the time limit in step 132, the flow advances to step 134 to determine whether or not the selected operation is an operation for continuing communication. Here, if the selected operation is an operation of continuing communication as in the first, second, and third options, the process proceeds to step 142 in FIG. 5 described above, and the communication operation is continued. Even during the communication operation in this case, it is desirable to notify the operator that data transmission that is not completed within the time limit is being executed (for example, display on the display 22).

On the other hand, if the selected operation is the operation of stopping the communication as in the fourth option, the communication is stopped according to the option without transmitting the data.

As described above, in the fifth embodiment, when transmission data cannot be transmitted within the time limit, the operator is caused to select an operation to be performed in the future, and the subsequent processing is executed according to the selected content.

A time limit is provided for the selection by the operator, and if no selection is made within the time limit, the subsequent processing is executed according to preset default options.

[Sixth Embodiment] Hereinafter, a sixth embodiment corresponding to the inventions of claims 12, 15 and 16 described in the claims will be described.
An embodiment will be described. In the sixth embodiment, a communication control process performed between a receiving terminal and a transmitting terminal whose continuous communication time is restricted will be described with reference to FIGS. 10 and 11. FIG. 10 shows a control routine in the transmitting terminal.
FIG. 11 shows a control routine in the receiving terminal.

First, the transmitting terminal connects the line and dials the other terminal (receiving terminal) (step 1 in FIG. 4).
02) Then, wait for a response from the partner machine (step 10).
4).

On the other hand, if there is an incoming call (if affirmative determination is made in step 202), one receiving terminal transmits a CED signal after connecting the line (step 204). Furthermore, information that there is a restriction on continuous communication time and information on the time limit
The NSF is added to the SF, and the NSF, CSI, and DIS are transmitted (step 206).

Upon receiving the CED signal, the transmitting terminal further receives NSF, CSI, and DIS, and analyzes the received NSF, CSI, and DIS (step 10).
6).

Here, in the sixth embodiment, since the receiving terminal adds to the NSF that the continuous communication time is restricted at its own terminal (receiving terminal) and information on the time limit, the transmission is performed. The analysis of step 106 allows the side terminal to recognize that the continuous communication time is limited at the receiving terminal.

When there is a restriction on the continuous communication time at the receiving terminal as described above, a data transmission method is selected so as to adapt to the restriction, and data transmission is performed based on the selected method. In step 109, for example, an operation of transmitting data of the maximum number of frames that can be transmitted up to the time limit and terminating (first option), transmitting data of the maximum number of frames that can be transmitted up to the time limit and temporarily interrupting the operation After that, an operation of reconnecting and retransmitting from the data immediately after the interruption (second option), an operation of transmitting data after converting data so that transmission of all data is completed within a time limit (third option) , The data transmission method can be selected from the operation of stopping transmission (fourth option) and the like.

If there is no restriction on the continuous communication time at the receiving terminal, normal data transmission may be performed.

[0137] One receiving terminal performs step 2 in FIG.
At 11, the data transmitted from the transmitting terminal is received under the restriction of the continuous communication time.

As described above, in the sixth embodiment, the transmitting terminal receives notification from the receiving terminal that the terminal (receiving terminal) has a restriction on the continuous communication time, and adapts to the restriction. Since a data transmission method is selected and data transmission is performed based on the selected method, smooth transmission and reception of data can be realized even when a terminal having a restriction on continuous communication time becomes a receiving terminal.

[0139] When a terminal having a restriction on the continuous communication time becomes a transmitting terminal, the receiving terminal indicates that there is a restriction on the continuous communication time from the transmitting terminal to its own terminal (transmitting terminal). Upon receiving the notification, as described in the second embodiment, a large amount of data is transmitted from the transmitting terminal into a plurality of data pieces each of which can be transmitted within a time limit, and the divided data is merged. By restoring a large amount of original data, smooth transmission and reception of data can be realized.

[0140]

According to the present invention, it is possible to transmit a large amount of data and realize a smooth data transmission even in a situation where the continuous communication time with another communication terminal device is limited. Is obtained.

[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 showing a general communication operation sequence between a transmitter and a receiver.

FIG. 3 is a diagram showing a communication operation sequence in the first and second embodiments.

FIG. 4 is a flowchart illustrating a first half of a control routine according to the first embodiment.

FIG. 5 is a flowchart showing a latter half of a control routine in the first, third, fourth, and fifth embodiments.

FIG. 6 is a flowchart illustrating a control routine according to a second embodiment.

FIG. 7 is a flowchart illustrating a first half of a control routine according to a third embodiment.

FIG. 8 is a flowchart illustrating a first half of a control routine according to a fourth embodiment.

FIG. 9 is a flowchart showing a first half of a control routine according to a fifth embodiment.

FIG. 10 is a flowchart illustrating a control routine in a transmitting terminal according to a sixth embodiment.

FIG. 11 is a flowchart illustrating a control routine in a receiving terminal according to a sixth embodiment.

[Explanation of symbols]

 Reference Signs List 10 communication terminal device 12 CPU 20 keyboard 38 telephone network 50 exchange

Claims (16)

[Claims] 1. A communication terminal device in which a continuous communication time with another communication terminal device is limited to a predetermined time limit or less, wherein the communication terminal device sets a communication time within a time limit based on the time limit and an amount of data to be transmitted. A communication terminal device comprising: a setting unit that sets a maximum amount of data that can be transmitted; and a control unit that controls transmission of data having the data amount set by the setting unit. 2. The control means, when the time limit has elapsed, after temporarily interrupting communication with another communication terminal device, reconnecting to the other communication terminal device, and starting from data immediately after the interruption. The communication terminal device according to claim 1, wherein transmission is restarted. 3. A communication terminal device in which continuous communication time with another communication terminal device is limited to a predetermined time limit or less, and all data to be transmitted are transmitted within the time limit. A communication terminal device, comprising: data conversion means for performing data conversion on the data to be transmitted; and transmission means for transmitting the data after the data conversion. 4. A communication terminal device in which continuous communication time with another communication terminal device is limited to a predetermined time limit or less, wherein data to be transmitted is transmitted within the time limit before starting data transmission. A communication terminal device comprising: a determination unit for determining whether transmission is completed; and a notification unit for notifying that transmission is not completed when data to be transmitted is not completed within the time limit. 5. The communication terminal device according to claim 4, further comprising a prohibition unit for prohibiting data transmission when transmission of data to be transmitted is not completed within the time limit. 6. If the transmission of the data to be transmitted is not completed within the time limit, there is further provided a selection unit for selecting whether or not to transmit the data. The communication terminal device according to claim 4, wherein whether to transmit data is determined based on a selection result. 7. The control means, when selected by the selection means within a predetermined time, determines whether or not to transmit data based on the selection result, and selects the data within a predetermined time. 7. The communication terminal device according to claim 6, wherein if not performed, control is performed to stop data transmission. 8. The control means, when selected by the selection means within a predetermined time, determines whether or not to transmit data based on a result of the selection, and selects the data within a predetermined time. 7. The communication terminal device according to claim 6, wherein if not performed, data transmission is controlled based on a procedure prescribed in advance. 9. When the data transmission is selected, the selection means transmits the maximum amount of data that can be transmitted up to the time limit and terminates the transmission, or selects the maximum data amount that can be transmitted up to the time limit. After transmitting the data of the data amount and temporarily interrupting, reconnect and control to retransmit from the data immediately after the interruption, or convert the data so that transmission of all data is completed within the time limit, and then transmit the data 7. The communication terminal device according to claim 6, wherein the control unit controls data transmission based on the selected procedure. 8. 10. The notifying unit, while performing data transmission not completing transmission within the time limit, notifying that data transmission not completing transmission within the time limit is being executed. Item 5. The communication terminal device according to item 4. 11. A communication terminal device in which continuous communication time with another communication terminal device is limited to a predetermined time limit or less, wherein the other communication terminal device is receiving data from the other communication terminal device. Interrupt detection means for detecting that data transmission has been interrupted, and reconnection determination means for determining whether or not the same communication terminal device is reconnected within a predetermined time after the data transmission is interrupted Data forming means for forming complete data by adding data received after reconnection to data received before interruption when data is reconnected from the same communication terminal device within the specified time. A communication terminal device comprising: 12. A communication terminal device in which a continuous communication time with another communication terminal device is limited to a predetermined time limit or less, wherein the own terminal determines that the continuous communication time with another communication terminal device is a predetermined time limit. A communication terminal device having a notifying means for notifying a partner terminal before starting communication that the communication terminal device is restricted to a time or less. 13. The communication terminal device according to claim 1, wherein the communication terminal device is connected to a communication network in which a time limit is set in advance to a continuous communication time between the communication terminal devices. The communication terminal device according to claim 1. 14. The communication terminal device according to claim 1, wherein the communication terminal device itself has a time limit set for a continuous communication time with another communication terminal device. The communication terminal device according to claim 1. 15. A communication system comprising a plurality of communication terminal devices including a communication terminal device whose continuous communication time with another communication terminal device is limited to a predetermined time limit or less, wherein the continuous communication time Prior to receiving data from another communication terminal device, the restricted communication terminal device is a communication terminal device in which continuous communication time with the other communication terminal device is limited to a predetermined time limit or less. To the other communication terminal device, and the notified other communication terminal device transmits the data of the maximum data amount that can be transmitted until the time limit and ends, or the maximum data that can be transmitted until the time limit. Whether to send a certain amount of data and temporarily stop and then reconnect and control to retransmit from the data immediately after the interruption, or to convert the data so that transmission of all data is completed within the time limit and then send the data , To perform any of the procedures selectively, a communication system, characterized in that. 16. A communication control method in a communication system including a plurality of communication terminal devices including a communication terminal device in which continuous communication time with another communication terminal device is limited to a predetermined time or less, Prior to transmitting data from the communication terminal device having the limited continuous communication time to the communication terminal device having the limited continuous communication time, the communication terminal device having the limited continuous communication time may have its own terminal performing continuous communication with another communication terminal device. Notifying the other communication terminal device that the time is a communication terminal device whose time is limited to a predetermined time limit or less, the notified other communication terminal device transmits data of the maximum data amount that can be transmitted up to the time limit. Either send and terminate, or transmit the maximum amount of data that can be transmitted up to the time limit, temporarily suspend, then reconnect and control to retransmit from the data immediately after the interruption, or perform all data within the time limit. After data conversion to complete sending the data, to send the data, to selectively perform any of steps of the communication control method, characterized in that.