JP3146013B2 - Data communication terminal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention, a plurality of communication channels
An integrated digital service network capable of using data communication
(Hereinafter, referred to as "ISDN") .

[0002]

2. Description of the Related Art A data communication terminal device generally includes a communication control device having a channel interface unit and a line control unit, and a host computer connected to the communication control device.
In the above data communication, one user information transfer channel (hereinafter, referred to as B channel) is secured by one call control procedure, and data communication is performed on the B channel.

[0003]

However, in the above-mentioned conventional data communication terminal device, only one B channel can be used even if the host computer has a multiplex processing function such as a videophone. Operation can only be performed, and the characteristics of the host computer are reduced.

The present invention has been made in view of such a problem, and has been made in connection with at least one communication channel.
Communication with the other party
The number of communication channels connected to the terminal can be increased
And to provide a that data communication terminal device.

[0005]

In order to achieve the above object, a data communication terminal according to the present invention provides a user information transfer apparatus.
A data communication terminal device connected to a digital circuit network having a plurality of communication channels for communication.
Communication request parameters for using the channel
Comprising setting means for setting the user information element, and sending means for sending the user-user information elements before SL communications request parameter is set by the setting means to the digital network, and the called terminal Said plurality of communication channels between
When negotiation of communication start using
Is a part of the plurality of communication channels.
Data communication by the
When communicating using a communication channel, the user
・ Communication using multiple communication channels for user information elements
The called party sends a message to the effect that the request parameters have been set.
When received from a terminal, the communication
Control means for controlling data communication.
It is characterized in that that.

[0006] The present invention also provides a method for transferring user information.
At least a plurality of communication channels including first and second communication channels.
Data communication connected to a digital network with channels
In the terminal device, the first and second communication channels
That at least one of the
Channel connection means to perform
Either the first or second communication channel
Is connected to the other party's communication terminal to communicate the communication data.
The other communication channel that is not connected
A connection instruction for connecting the channel to the other party's communication terminal is issued.
Detecting means for detecting whether or not the
When the connection instruction is detected, the other communication
A channel is connected to the other communication terminal and the first and second
Data using both communication channels
Communication control means for controlling to perform data communication.
It is characterized in that that.

[0007] The present invention also provides a method for transferring user information.
At least a plurality of communication channels including first and second communication channels.
Data communication connected to a digital network with channels
In the terminal device, at least the first and second communications
Determining means for determining whether the channel can be used;
Uses two communication channels, a first and a second communication channel
Receiving a data communication request from the partner communication terminal
Means, and said two communication channels by said receiving means.
When a request for used data communication is received,
The communication channel is used and the phase
Channel connection means for connecting to a hand communication terminal;
Said first or said second communication channel by means of
One of the communication channels is
When the communication data is being communicated while connected to the
The other communication channel, which is not connected,
If it is determined that it can be used by the step,
Connect one communication channel to the other communication terminal and
Communication control means for controlling communication.
It is characterized by.

[0008]

[Action] According to the above configuration, at least one communication channel
If data communication is performed using the
During communication, increase the number of communication channels connected to the same
Can be added.

[0009]

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

FIG. 1 is a block diagram showing a data communication terminal having a (2B + D) basic interface connected to an ISDN 1 as an embodiment of the data communication terminal according to the present invention. Is a communication control device 3 for negotiating the possibility of bulk communication using two B channels during one communication with a partner terminal by executing a predetermined call control procedure, and a multiplexing system such as a videophone or videoconference system. And a host computer 4 having a processing function and connected to the communication control device 3.

[0011] The communication control device 3 includes an ISDN 1
And a predetermined user / network interface (CCI
A line control unit 5 for performing line control according to TT Recommendation I series), a channel interface unit 6 connected to a host computer 4, a ROM 7 storing a predetermined control program, an ISDN 1 and a host computer 4.
And a RAM 9 having a buffer area for storing communication data, a work area used for control by the CPU 8, and the like.

FIGS. 2, 3 and 4 are flowcharts showing the control procedure of the calling communication control device 3 when performing bulk communication in the data communication terminal device.

In FIG. 2, first, a "call request command" from the host computer 4 is waited for via the channel interface unit 6 (step S1). When the "call request command" is received, a user / user information element Is set to the bulk communication request parameter (step S2),
"SETUP" command ("call setup request" command) IS
Send to DN (step S3). Next, after turning on the bulk communication flag (step S4), the process waits for a "CALL PROC" command (a notification command of "processing in progress for call setup") from ISDN 1 (step S5).
After receiving the "LL PROC" command, the system waits for the reception of a "CONN" command (a notification command indicating that the called party has responded) from the ISDN 1 (step S6). When the "CONN" command is received, It is checked whether a bulk response parameter is set in the user / user information element of the called terminal (step S7). If the bulk response parameter is set, a "SETUP" command for the called party currently communicating is again sent to the ISDN 1 (step S8), and then a "CALL PROC" command from the ISDN 1 is waited for (step S9). When the "CALL PROC" command is received, the control procedure shown in FIG. 3 is executed.

That is, first, "CON"
An "N" command is waited for (step S10). When the "CONN" command is received, a "CONN ACK" command ("confirmation for CONN" command) is transmitted to the ISDN 1 (step S11). Next, a bulk communication mode parameter is created in order to notify the host computer 4 that "bulk communication is to be performed" (step S12), and the bulk communication mode parameter is sent to the host computer 4 together with the "connection complete" command (step S13). ), Two B channels are connected between terminals, and bulk communication using two B channels is started during one communication (step S1).
4).

On the other hand, in step S7 (FIG. 2), I
If there is no bulk response parameter in the user / user information element sent by the “CONN” command from SDN1 (ie, in this case, since the “CONN” command has already been received from the ISDN in step S6, the called side In this case, only one B channel can be used at present.)
Sends a "CONN ACK" command to the ISDN 1 (step S15), and then sends a "connection complete" command to the host computer 4 (step S16) to start 1B communication using one B channel (step S16). Step S1
7).

Then, as shown in FIG. 4, if a "SETUP" command is received from the ISDN 1 during the 1B communication (step S18), it is checked whether or not the bulk communication flag is ON (step S19). Flag is O
In the case of N, it is checked whether or not the bulk response request parameter is set in the user / user information element (step S20). If the bulk response request parameter is set, a bulk communication mode parameter for notifying the host computer 4 that another B channel has been connected is created (step S2).
1) Next, the bulk communication mode parameter together with the "call-in" command from the partner terminal is transmitted to the host computer 4.
(Step S23). Next, it waits for an "incoming call acceptance" command from the host computer 4 (step S23), and upon receiving the "incoming call acceptance" command, sets a bulk communication response parameter in the user / user information element (step S24). CONN "command to ISDN
1 (step S25). And after this, IS
Wait for the "CONN ACK" command from DN1 (step S
26) When the "CONN ACK" command is received, a "connection complete" command is sent to the host computer 4 (step S27), and 2B communication (bulk communication) is started.

If the bulk communication flag is not turned on in step S19, and if the bulk communication request parameter is not set in the user / user information element in step S20, the mode is such that bulk communication cannot be performed. A call rejection subroutine is executed (step S29).

FIG. 5, FIG. 6, and FIG. 7 are flowcharts showing the control procedure of the called-side communication control device 3 when performing the bulk communication.

In FIG. 5, first, a "SETUP" command from ISDN 1 is waited for (step S101).
Upon receiving the "ETUP" command, it is checked whether a bulk request parameter is set in the user / user information element sent by the "SETUP" command (step S102). It is determined whether or not one of the two B channels is in use (step S103). Then, when it is determined that it is not in use, a bulk communication response parameter is set in the user / user information element (step S104), and a “CONN” command is sent to ISDN1 (step S105). Next, it waits for the reception of the "SETUP" command from the ISDN 1 (step S106). When the "SETUP" command is received, a bulk communication mode parameter is created (step S107). The data is sent to the host computer 4 (step S108).

Next, the system waits for an "incoming call accepted" command from the host computer 4 (step S109), and upon receiving the "incoming incoming call" command, executes the control procedure shown in FIG. That is, a “CONN” command is sent to ISDN1.
(Step S110), waits for a "CONN ACK" command from ISDN1 (Step S111), and upon receiving the "CONN ACK" command, sends a "Connection Complete" command to the host computer 4 (Step S112).
(Bulk communication) is started (step S113).

On the other hand, in step S102 (FIG. 5), when the bulk communication request parameter is not set in the user / user information element transmitted by the "SETUP" command, and in step S103, the two B channel If one B channel is in use,
Since the bulk communication cannot be performed, normal user / user information for which the bulk communication request is not set is transmitted to the host computer 4 together with the incoming call command (step S11).
4). Next, an "incoming call reception" from the host computer 4
Waiting for a command (step S115), the "call reception"
If the command is received, a "CONN" command is sent to ISDN 1 (step S116). Next, it waits for a "CONN ACK" command from ISDN1 (step S11).
7) When the "CONNACK" command is received, a "connection complete" command is sent to the host computer 4 (step S118), and 1B communication is started (step S11).
9).

Thereafter, the use state of the B channel is monitored, and the control procedure of FIG. 7 is executed. That is, it is determined whether or not another B channel is available (step S120), and when it becomes available, a bulk communication request parameter is set in the user / user information element (step S121), and the current communication is being performed. A "SETUP" command for the other party (calling terminal) is transmitted to ISDN1 (step S122). Next, "CALL PROC" from ISDN1
Waiting for a command (step S123), the "CALL PRO
When the "C" command is received, it waits for the "CONN" command from ISDN1 (step S124). When the "CONN" command is received, a bulk communication mode parameter is created (step S125), and the bulk communication mode parameter is sent to the host computer 4 together with the "connection complete" command (step S126). Next, a "CONN ACK" command is sent to ISDN1 (step S127), and 2B
Communication (bulk communication) is started (step S128).

FIG. 8 is a format diagram showing an example of a user / user information element defined in the INS network 64 (service based on the above-described basic interface and based on NTT service).

The information element is composed of a plurality of octets. In octet 1, "0" is written in bit 8 and a predetermined identification code is written in other bits. Also,
In octet 2, the octet length of the information element content written after octet 3 is written. In octet 3, a protocol identifier is written. In the present embodiment, "0" is written in all bits of the protocol identifier, so that a user-specific usage is enabled.

Thus, user information such as a bulk communication request or a bulk communication response is written in octet 4 and octet 5 in this embodiment.

FIG. 9 shows a case where the bulk communication request parameter is set in octet 4 and octet 5 of the user / user information element. That is, in octet 4, "1" is written in bits 1 and 8, and "0" is written in the remaining bits, indicating that the mode is set to the bulk mode. Octet 5 indicates that "1" is written in bit 1 and that the bulk communication flag on the calling side is ON.

FIG. 10 shows a case where a bulk communication response parameter is set in octet 4 and octet 5 of the user / user information element. That is,
Octet 4 indicates that "1" has been written to bit 1 and bit 8 as in FIG. 9, indicating that the mode is set to the bulk mode. In octet 5, "1" is written in bit 2 and the bulk communication flag on the called side is turned on.
It indicates that you are doing.

By setting the bulk communication request parameter and the bulk communication response parameter in the user / user information element as described above, desired 2B communication can be performed according to the flowcharts of FIGS. can do.

It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that the present invention can be modified without departing from the scope of the invention. For example, in the above embodiment, (2B +
Although the basic interface having the channel structure D) is used, the present invention can be applied to a primary group interface having a channel structure such as (23B + D).

[0030]

According to the present invention as described in detail above, small
Perform data communication using at least one communication channel.
Connected to the same communication terminal during such communication.
Communication channels to be used
Highly efficient data communication can be performed.

For example, at the start of communication, the first communication channel
Is unavailable and the second communication channel is available
If so, first use the available second communication channel
And perform data communication with the other party's communication terminal.
As soon as the communication channel becomes available, the first communication channel
Since the channel is connected to the other party's communication terminal,
As the number of channels increases, the first and second communication
Data communication using both channels.
Efficient data communication can be performed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a data communication terminal device according to the present invention.

FIG. 2 is a flowchart (1/3) showing an example of a control procedure on the calling side of the data communication terminal device.

FIG. 3 is a flowchart (2/3) showing an example of a control procedure on the calling side of the data communication terminal device.

FIG. 4 is a flowchart (3/3) showing an example of a control procedure on the calling side of the data communication terminal device.

FIG. 5 is a flowchart (1/3) showing an example of a control procedure on the called side of the data communication terminal device.

FIG. 6 is a flowchart (2/3) showing an example of a control procedure on the called side of the data communication terminal device.

FIG. 7 is a flowchart (3/3) showing an example of a control procedure on the called side of the data communication terminal device.

FIG. 8 is a format diagram showing an example of a user / user information element.

FIG. 9 is a format diagram showing an example of calling-side user information.

FIG. 10 is a format diagram showing an example of called-side user information.

[Explanation of symbols]

 8 CPU

Claims (10)

(57) [Claims] (1)Multiple communication channels for transferring user information
WithData communication terminal device connected to digital circuit network
PlaceAt A communication request parameter for using the plurality of communication channels;
Meter as user / user information element Setting means to set
And the setting meansNoteRequest parameters are set.
The digital user information element to the digital circuit network.
Sending means for sending to theUsing the plurality of communication channels with a called terminal
If the communication start negotiation is not established,
Data from some of the communication channels
Data communication is enabled and some of the communication channels
When communicating using
A communication request parameter using the plurality of communication channels
A message to the effect that the parameters have been set
If received from multiple communication channels,
Control means for controlling communication thing
A data communication terminal device characterized by the above-mentioned. (2)At least a first and a second
Comprising a plurality of communication channels including a second communication channel
In a data communication terminal connected to a digital network
hand, At least one of the first and second communication channels;
Channel connection method that allows one to connect to the other terminal
Steps and The first or second of the first or second
Either communication channel is connected to the other communication terminal
Connected during the communication of the communication data
The other communication channel that has not been
Detects whether a connection instruction for connection has been issued
Detecting means; When the connection instruction is detected by the detection unit,
Connecting the other communication channel with the other communication terminal
A communication channel for both the first and second communication channels
Communication control means that controls to perform data communication using
Having steps Data communication terminal device characterized by the following:
Place. 3. When starting communication of the communication data,
At least two channels of said first and second communication channels.
Data communication using the communication channel For communication terminals
Has request means for requesting, The channel connection means responds to a request by the request means.
The communication channel based on a response from the other party's communication terminal.
3. A data connection according to claim 2, wherein a channel is connected.
Communication terminal equipment. 4. The request means of the digital network
Making said request via a user-user information element
The data communication terminal device according to claim 3, wherein: 5. The communication according to claim 5, wherein the response is a communication by the other party's communication terminal.
The communication channel availability status is transmitted from the partner communication terminal.
4. The data communication terminal according to claim 3, wherein
apparatus. 6. The communication device according to claim 5 , wherein
And detecting the connection instruction.
The data communication terminal device according to claim 5. 7. The digital network according to claim 1, wherein the digital network is an integrated digital service.
7. A screw network according to claim 1, wherein
The data communication terminal device according to any one of the above. 8.At least a first and a second
Comprising a plurality of communication channels including a second communication channel
In a data communication terminal connected to a digital network
hand, Availability of at least the first and second communication channels
Determining means for determining a state; Two communication channels of the first and second communication channels
Receives a data communication request using
Receiving means, The receiving means used the two communication channels.
When a request for data communication is received, the discriminating means
The communication channel is used according to the result, and
Channel connection means for connecting to the terminal, The first or second communication is performed by the channel connection means.
One of the communication channels is
Connects to the other communication terminal and performs communication of the communication data
The other communication channel that is not connected
When it is determined that the device can be used by the determination unit
Is the other communication channel Connect with communication terminal
Communication control means to control data communication
A data communication terminal device comprising: 9. The method according to claim 8, wherein the receiving means includes a user / user information required.
Data using the first and second communication channels.
9. A data communication request is received.
Data communication terminal device. 10. The digital network according to claim 1, wherein said digital network is an integrated digital network.
10. A service network.
The data communication terminal device according to any one of the above.