JP3272071B2 - Control method of data terminal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a data terminal device capable of transmitting data using two data communication channels simultaneously.

[0002]

2. Description of the Related Art For example, when a data amount of transmission data is large or a data transmission density per time is large, a data terminal device capable of simultaneously transmitting data using two data communication channels is proposed. Have been.

[0003] Such a data terminal device is disclosed in, for example, Japanese Patent Publication No. 3-68669.

[0004]

However, in this conventional device, one terminal device performs two call setting operations, so that only the terminal device is charged, and the burden on the one terminal device increases. This causes the inconvenience.

[0005] The present invention has been made in view of such circumstances, and has as its object to provide a control method of a data terminal device capable of reducing the burden of communication charges.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a method for controlling a data terminal device capable of simultaneously transmitting data using two data communication channels, wherein a first data terminal device issues a second data terminal device. The call establishes a first communication channel, and then the second data terminal calls the first data terminal to establish a second communication channel and establishes a communication path between the two data communication channels. It is intended to be secured as.

Further, in a control method of a data terminal device using ISDN as a transmission path and capable of simultaneously transmitting data using two information channels, a first data terminal device for securing a first information channel is provided. Originates a call to the second data terminal device, and the second data terminal device confirms the incoming call from the first data terminal device.
The first data terminal device calls the first data terminal device in order to secure the information channel of the second data terminal device. Establishes a second information channel, and when the second data terminal confirms the response of the first data terminal, responds to the call from the first data terminal by the first data terminal.
Is established.

In a method for controlling a data terminal device capable of simultaneously transmitting data using two data communication channels, the starting data terminal device calls the activated data terminal device, and subsequently the starting data terminal device. When another call cannot be set up between the data terminal device of the target device and the data terminal device of the activatable side, data transmission is performed using the one data communication channel, and the data terminal device of the activator is activated. When another call can be set up with the data terminal device on the receiving side, another call is set up between the data terminal device on the starting side and the data terminal device on the activated side. The data transmission using one data communication channel is performed.

In a control method for a data terminal device capable of simultaneously transmitting data using two data communication channels, the data terminal device on the starting side calls the data terminal device on the activated side and secures the call at that time. Data transmission using one of the data communication channels described above, and in that state,
When the data transmission load increases, another call is set up between the initiating data terminal device and the initiating data terminal device,
Thereafter, data transmission using two data communication channels is executed.

[0010]

[0011]

Accordingly, since the communication fee is borne by the two data terminal devices, it is possible to avoid a situation in which the load of the fee of one data terminal device increases. Further, since the two data communication channels are used only when the communication load increases, efficient data communication can be performed. In addition, since a call is made from a data terminal device having a lower line fee, the overall data communication fee can be reduced.

[0012]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 shows a group 4 facsimile apparatus according to an embodiment of the present invention.

In FIG. 1, a control section 1 mainly performs control processing of each section of the group 4 facsimile apparatus, and a system memory 2 executes a control processing program executed by the control section 1 and a processing program. In addition to storing various data and the like necessary when performing the operation, the work area of the control unit 1 is configured, and the parameter memory 3 stores various information unique to the group 4 facsimile apparatus. .

The scanner 4 is for reading an original image at a predetermined resolution, the plotter 5 is for recording and outputting an image at a predetermined resolution, and the operation display unit 6 is a facsimile apparatus. To operate,
It consists of various operation keys and various indicators.

The encoding / decoding section 7 encodes and compresses the image signal and decodes the encoded and compressed image information into the original image signal.
This is for storing a large number of image information in a coded and compressed state.

The ISDN interface circuit 9 connects the group 4 facsimile apparatus to the ISDN, and integrates a signal processing function of layer 1 and a signal of D channel (signal channel) and two B channels (information channel). It has a separation function, and the D-channel transmission control unit 10 controls the ISD
This is for performing signal processing on the N D channels, and the B channel transmission control units 11 and 12 are for realizing a group 4 facsimile transmission procedure function performed on the B channel.

The multiple call control unit 13 executes a call control process relating to one and two call settings.
The multiple call manager 14 manages two call setting operations. In this case, the B-channel transmission control units 11 and 12 can execute a data transmission operation using two B-channels at the same time.

The control unit 1, the system memory 2,
A parameter memory 3, a scanner 4, a plotter 5, an operation display unit 6, an encoding / decoding unit 7, an image storage device 8, B channel transmission control units 11 and 12, a plurality of call control units 13,
The multiple call management unit 14 is connected to a system bus 15, and data exchange between these elements is mainly performed via the system bus 15.

FIG. 2 shows an example of a data transmission operation performed between the group 4 facsimile apparatuses shown in FIG. 1 in the above configuration. In this case, the terminal A is connected to one ground, and the terminals B1 and B2 are connected to the other ground. That is, the terminal B1 and the terminal B2 are connected to the ISDN interface having the same address. The data communication partner of the terminal A is the terminal B1.

First, the terminal A sends out a call setup message (1/2) indicating the first call setup when data is transmitted using two B channels to the network.
Here, as the data indicating the first call setup when data is transmitted using two B channels, a user / user information element which is one of the information elements of the call setup message can be used. . Regarding the following call setting messages, the contents in parentheses are set in the user / user information element, which is one of the information elements of each call setting message.

As a result, a call setup message (1/2) is transmitted from the network to the destination. The terminal B1 and the terminal B2 that have received the call setup message (1/2) respectively have a call setup message (2/1/2) indicating that this is the second call setup when data transmission is performed using two B channels. 2) is sent to the network.

At this time, if the terminal B1 sends a call setup message (2/2) before the terminal B2, a release completion message is sent from the network to the terminal B2, and the call is rejected. Is done. Therefore, terminal A has terminal B
A call setup message (2/2) from the network 1 is transmitted from the network.

Upon receiving the call setup message (2/2) transmitted from terminal B1, terminal A responds to the call setup message (2/2) by receiving a response message (2/2). / 2) to the network. This response message (2/2) is transmitted from the network to the terminal B1, whereby the first B channel is first transmitted between the terminal A and the terminal B1.
Establish between.

The terminal B1 having received the response message (2/2) sends a response message (1/2) to the network in order to answer the call setup message (1/2).
This response message (1/2) is sent from the network to terminal A, whereby a second B channel is established between terminal A and terminal B1.

In this way, when two B channels are established between the terminal A and the terminal B1, the terminal A and the terminal B1
Performs a data transmission operation using two B channels simultaneously.

As described above, in this embodiment, since the terminal A calls the terminal B1 and the terminal B1 calls the terminal A, each of the terminal A and the terminal B1 has one B
Since the charging of the channel is charged, the charging load is prevented from being biased.

FIG. 3 shows an example of a process executed by the terminal A on the activating side at the time of the call setting operation in FIG.

First, the terminal A sends a call setup message (1 /
2) is sent to call the other party (process 101), and a call setting acceptance message is received from the network (process 102). Next, the process waits until a call setup message (2/2) is received from the network (NO loop of decision 102).

When a call setup message (2/2) is received from the network and the result of decision 102 is YES, terminal A
A response message (2/2) is sent to the network (Process 10
4) Receive a response confirmation message from the network (Process 10)
5).

Next, when a response message (1/2) is received from the destination (step 106), a data communication operation using two B channels is started (step 10).
7).

FIG. 4 shows an example of the process executed by the terminal B1 on the actuation side in FIG.

First, when an incoming call is detected, the contents of the call setup message received at that time are analyzed (process 201).
It is checked whether the own terminal can be connected to the other terminal (decision 202). When the result of the determination 202 is NO, the incoming call is ignored (process 203).

If the result of decision 202 is YES, it is checked whether a call setup message (1/2) has been received at that time (decision 204). At this time, judgment 20
If the result of No. 4 is NO, the process shifts to a normal incoming call process. When the result of determination 204 is YES, a call setup message (2/2) is sent to the network (process 205), and a call setup acceptance message is received from the network (process 206).

Next, when the response message (2/2) is received (process 207), the response message (1/2) is transmitted to the network (process 208), and when the response confirmation message is received from the network (process 209), A data communication operation using two B channels is started (process 210).

FIG. 5 shows another example of the data transmission operation performed between the group 4 facsimile apparatuses shown in FIG. In this case, as in FIG. 2, the terminal A is connected to one ground, and the terminals B1 and B2 are connected to the other ground.

In this case, a terminal B2 at the same ground as the terminal B1 calls a terminal C at a different ground from the terminal A, and one B channel is established between the terminals B1 and C. While the data transmission operation is being performed between the terminal B1 and the terminal C, the terminal A indicates that this is the first call setup when data transmission is performed using two B channels, and the terminal A establishes the first call setup. A call setup message (1/2, CE) indicating that the number of channels to be changed can be changed is sent to the network.

As a result, a call setup message (1/2, CE) is transmitted from the network to the destination. The terminal B1 that has received the call setup message (1/2, CE) is a call setup message (2/2) indicating that this is the second call setup when data is transmitted using two B channels.
To the network.

At this time, since there is no available channel on the terminal side of the terminal B1, the network sends a release completion message to the terminal B1.
And reject the call at this time. Thereby,
The terminal B1 sends a response message (1/2). As a result, one B channel is established between the terminal A and the terminal B1, and the terminal A and the terminal B1 start a data communication operation using the one B channel. At the same time, the terminal B1 starts a timer for managing the re-call.

When the data communication operation between the terminal C and the terminal B2 is completed, a call disconnection release procedure is executed between the terminal C and the terminal B2, and a call established between the terminal C and the terminal B2 is performed. Is restored.

In this way, after the call established between the terminal C and the terminal B2 is restored, when the re-calling timer of the terminal B1 times out, the terminal B1 again receives the two B calls.
A call setup message (2/2) indicating the second call setup for data transmission using a channel is sent to the network. At this time, since there is a free channel, the network accepts this call, and therefore, a call setup message (2/2) from terminal B1 is sent to terminal A from the network.

Upon receiving the call setting message (2/2) transmitted from terminal B1, terminal A responds to the call setting message (2/2) by receiving a response message (2/2). / 2) to the network. This response message (2/2) is sent from the network to terminal B1, whereby a second B channel is established between terminal A and terminal B1.

Therefore, thereafter, terminal A and terminal B1 start a data transmission operation using two B channels simultaneously.

As described above, in this embodiment, since the terminal A sets the number of B channels to be established between the terminal A and the terminal B1 according to the idle channel of the terminal B1, the efficiency is improved. Data communication operation becomes possible.

FIG. 6 shows an example of the processing executed by the terminal A on the activating side at the time of the call setting operation in FIG.

First, terminal A sends a call setup message (1 /
2, CE) to call the other party (process 30).
1) Receive a call setting acceptance message from the network (Process 3)
02). Next, a call setup message (2/2) from the network,
Alternatively, the process waits until the response message (1/2) is received (NO loop of determinations 303 and 304).

When a call setup message (2/2) is received from the network and the result of determination 303 is YES, terminal A sends a response message (2/2) to the network (process 3).
05), a response confirmation message is received from the network (Process 3)
06).

Next, upon receiving a response message (1/2) from the other party (step 307), a data communication operation using two B channels is started (step 30).
8).

When the result of determination 304 is YES, a data transmission operation using one B channel is started (process 309), and it waits for reception of a call setup message (2/2). (NO loop of decision 310).

Upon receiving the call setup message (2/2),
If the result of decision 310 is YES, a response message (2/2) is sent (process 311), a response confirmation message is received from the network (process 312), and a data communication operation using two B channels is performed. Start (processing 31
3).

FIGS. 7 and 8 show an example of processing executed by the terminal B1 on the activated side in FIG.

First, when an incoming call is detected, the contents of the call setup message received at that time are analyzed (process 401).
It is checked whether the own terminal can be connected to the other terminal (decision 402). When the result of the determination 402 is NO, the incoming call is ignored (process 403).

If the result of decision 402 is YES, it is checked whether a call setup message (1/2, CE) has been received at that time (decision 404). At this time,
When the result of the determination 404 is NO, the processing shifts to a normal incoming call processing. If the result of determination 404 is YES, a call setup message (2/2) is sent to the network (process 405), and the process waits until a call setup acceptance message is received from the network or a release completion message is received. (NO loop of processes 406 and 407).

When a call setting acceptance message is received,
If the result of decision 406 is YES, a response message (2/2) is received (process 408), a response message (1/2) is sent to the network (process 409), and a response confirmation message is received from the network. (Process 410) Two B's
The data communication operation using the channel is started (process 41).
1).

When a release completion message is received from the network in response to the call setting message (2/2) and the result of determination 407 is YES, a response message (1/2) is sent out (processing). 412), the response confirmation message is received (process 413), and a data communication operation using one B channel is started (process 414).

Then, a timer for managing the re-call interval is started, and the process waits until the timer expires (step 415). In this way, when the re-call interval time has elapsed, a call setup message (2/2) is sent to the network (process 416), and at this time, the call is accepted and a call setup acceptance message is received from the network. A check is made to determine whether or not to perform (decision 417).

When the result of decision 417 is YES, a response message (2/2) is received (step 41).
8) The data communication operation using the two B channels is started (process 419). If the result of the determination 417 is NO, the process returns to the process 415, and the calling operation is executed again.

As described above, when two B channels are open at the terminal on the activated side at the time of calling on the activated side, the same operation as that of FIG. Efficiency is improved.

FIG. 9 shows still another example of the data transmission operation performed between the group 4 facsimile apparatuses shown in FIG. Note that, in this case, each terminal has time information on the other terminal, such as the country or region where the other terminal is installed and the location where the own terminal is installed, for each of the other terminals that call. The time difference between them is stored.

First, the terminal A checks the time difference from the terminal B of the destination specified at that time, and checks whether the installation area of the terminal B is late at night when the communication fee is low. At this time, when the installation area of the terminal B is late at night, the terminal A
Is the first call setup in the case of data transmission using two B channels, and a call setup message (1/2, CB) indicating requesting a call from the terminal side
To the network.

As a result, a call setup message (1/2, CB) is transmitted from the network to terminal B. The terminal B sends a release completion message to the network once to terminate the call setting operation. Further, a release completion message is transmitted from the network to the terminal A, whereby the terminal A
Terminate the call setting operation once.

Next, the terminal B sends out to the network a call setup message (1/2) indicating that this is the first call setup for data transmission using two B channels. As a result, the call setup message (1
/ 2) is sent out. This call setup message (1/2)
A1 receives the response message (1/2), thereby transmitting the first B between the terminal A and the terminal B.
Channel is established.

The terminal B that has received the response message (1/2) subsequently sets up a call setup message (2/2) indicating that this is the second call setup for data transmission using the B channel. ) To the network. As a result, a call setup message (2/2) is transmitted from the network to terminal A. Terminal A receiving this call setup message (2/2)
1 sends a response message (2/2), whereby a second B channel is established between terminal A and terminal B.

When the two B channels are established in this way, data transmission between the terminal A and the terminal B using the two B channels is started.

As described above, in this embodiment, the call is set from the terminal side where the communication fee is lower, so that the communication fee for data transmission between the terminal A and the terminal B can be reduced. Can be.

FIG. 10 shows an example of the processing executed by the terminal A on the activating side at the time of the call setting operation in FIG.

First, the terminal A determines the time of the partner terminal from the time difference information of the terminal designated at that time (step 50).
1) It is checked whether or not it is in the midnight time zone (determination 502). If the result of determination 502 is NO, a call setup message (1/2) is sent to call the other party (process 503), and a call setup acceptance message is received from the network (process 504). Next, a call setup message (2
/ 2) is received (NO loop of decision 505).

When a call setup message (2/2) is received from the network and the result of decision 505 is YES, terminal A
A response message (2/2) is sent to the network (process 50).
6) Receive a response confirmation message from the network (Process 50)
7).

Next, upon receiving a response message (1/2) from the destination (step 508), a data communication operation using two B channels is started (step 50).
9).

When the other party terminal is in the midnight time zone and the result of determination 502 is YES, a call setup message (1/2, CB) is transmitted (process 510), and a release completion message is received from the network. Then, the process shifts to an incoming call waiting state (process 512).

In this state, when an incoming call is detected and a call setup message is received (process 513), it is checked whether or not a call setup message (1/2) is received at that time (decision 514). When the result of the determination 514 is NO, it is not the expected content, and the process returns to the process 512.

When the result of determination 514 is YES, a response message (1/2) is sent out (process 51).
5), and receives a call setting confirmation message from the network (process 51).
6), and waits for reception of a call setting message again (process 517).

When the call setting message (2/2) is received (result of determination 518 is YES), a response message (2/2) is sent out (process 519), and a call setting confirmation message is received from the network (step 519). Process 520), and the process proceeds to Process 509 to start a data communication operation using two B channels.

FIG. 11 shows an example of processing executed by the terminal B on the actuation side in FIG.

First, when an incoming call is detected, the contents of the call setup message received at that time are analyzed (step 601).
It is checked whether or not the own terminal can connect to the other terminal (decision 602). When the result of determination 602 is NO, the incoming call is ignored (process 603).

If the result of decision 602 is YES, it is checked whether a call setup message (1/2, CB) or a call setup message (1/2) has been received at that time (decisions 604, 605). At this time, if the result of the determination 605 is NO, the processing shifts to a normal incoming call processing.

If the result of decision 604 is YES, a release completion message is sent (process 606). Next, a call setup message (1/2) is transmitted (process 6).
07), a call setting acceptance message is received from the network (process 608).

When the response message (1/2) is received (process 609), a call setup message (2/2) is transmitted (process 610), and a call setup acceptance message is received from the network (process 611). .

Next, upon receiving the response message (1/2) (process 612), data transmission using two B channels is started (process 613).

When the result of determination 605 is YES, a call setup message (2/2) is sent to the network (process 614), and a call setup acceptance message is received from the network (process 615).

Next, when the response message (2/2) is received (process 616), the response message (1/2) is transmitted to the network (process 617), and when the response confirmation message is received from the network (process 618), Shift to processing 613,
A data communication operation using two B channels is started.

As described above, when the activated side is not in the midnight time zone, the same operation as that of FIG. 2 is performed, so that the efficiency of data communication is improved.

In the above-described embodiment, it is basically assumed that the data transmission operation using two B channels is executed. For example, the communication load of the application executed in the data terminal device is reduced. When the communication load exceeds a predetermined value, the second B
A calling operation for the channel can also be performed. In this case, the number of B channels to be used can be adaptively controlled according to the communication load of the application, so that the communication efficiency is significantly improved.

In the above-described embodiment, the case where the present invention is applied to a group 4 facsimile apparatus using ISDN as a transmission line has been described. However, the present invention relates to another type of terminal device using other transmission lines. Can be similarly applied.

[0085]

As described above, according to the present invention,
Since the communication fee is borne by the two data terminal devices, it is possible to avoid a situation where the load on the fee of one data terminal device increases. Further, since the two data communication channels are used only when the communication load increases, efficient data communication can be performed. In addition, since a call is made from a data terminal device having a lower line fee, an effect is obtained that the overall data communication fee can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a group 4 facsimile apparatus according to one embodiment of the present invention.

FIG. 2 is a time chart showing an example of a call setting procedure at the time of data transmission between the apparatuses shown in FIG. 1;

FIG. 3 is a flowchart showing an example of processing on the start side during the call setting procedure of FIG. 2;

FIG. 4 is a flowchart showing an example of processing on the actuated side during the call setting procedure of FIG. 2;

5 is a time chart showing another example of a call setting procedure at the time of data transmission between the devices in FIG. 1;

FIG. 6 is a flowchart showing an example of processing on an activation side during a call setting procedure in FIG. 5;

FIG. 7 is a flowchart showing a part of a process example on the actuation side in the call setting procedure of FIG. 5;

8 is a flowchart showing another part of the processing example on the actuation side in the call setting procedure of FIG. 5;

FIG. 9 is a time chart showing still another example of a call setting procedure at the time of data transmission between the apparatuses shown in FIG. 1;

FIG. 10 is a flowchart showing an example of processing on the activation side during the call setting procedure of FIG. 9;

FIG. 11 is a flowchart illustrating an example of processing on the activatable side during the call setting procedure in FIG. 9;

Claims (4)

(57) [Claims] 1. A method for controlling a data terminal device capable of simultaneously transmitting data using two data communication channels, wherein the first data terminal device calls the second data terminal device to set the first communication channel. Establishing, and then the second data terminal device calls the first data terminal device to establish a second communication channel, and secures two data communication channels as communication paths. A control method for a data terminal device. 2. A method for controlling a data terminal device using ISDN as a transmission path and capable of simultaneously transmitting data using two information channels, wherein the first data terminal device is used to secure a first information channel. Is the second
The second data terminal device confirms the incoming call from the first data terminal device, and then calls the first data terminal device in order to secure a second information channel. When the first data terminal confirms an incoming call from the second data terminal, the first data terminal responds to the incoming call to establish a second information channel, and the second data terminal transmits A method for controlling a data terminal device, characterized by establishing a first information channel in response to a call from the first data terminal device upon confirming a response from the first data terminal device. 3. A method for controlling a data terminal device capable of simultaneously transmitting data using two data communication channels, wherein the data terminal device on the starting side calls the data terminal device on the activated side, and subsequently the starting side data terminal device. When another call cannot be set up between the data terminal device of the target device and the data terminal device of the activatable side, data transmission is performed using the one data communication channel, and the data terminal device of the activator is activated. When another call can be set up with the data terminal device on the receiving side, another call is set up between the data terminal device on the starting side and the data terminal device on the activated side. A method for controlling a data terminal device, characterized by executing data transmission using two data communication channels. 4. A method of controlling a data terminal device capable of simultaneously transmitting data using two data communication channels, wherein the data terminal device on the starting side calls the data terminal device on the activated side and secures the call at that time. When the data transmission load increases in this state, another call is set up between the initiating side data terminal apparatus and the initiating side data terminal apparatus. , And thereafter, performing data transmission using two data communication channels.