JPH08214272A - Communication terminal - Google Patents

Abstract

(57) [Summary] [Purpose] To promptly create a communication path for multipoint communication by one operator and inform the operator of the situation at the time of creation. [Structure] A participant list selecting unit 21 selects a participant list to participate in multipoint communication of the storage unit 20, and the participant list transmitting unit 22 selects a user user information element or a sub-address information element included in the SETUP message. The call destination address acquisition unit 23 extracts and acquires the call destination address to be called from the transmitted participant list, and the remote automatic call unit 24 automatically transfers the call destination address to the acquired call destination address. Make a call to. [Effect] The user can easily know which terminal participates in multipoint communication and which terminal should call which terminal, and the address of the call destination to which the user should call. It is not necessary to check, and the operation when setting the communication path can be performed quickly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication terminal device, and more particularly to a communication terminal device such as a video conference terminal device capable of multipoint communication.

[0002]

2. Description of the Related Art Conventionally, in the field of communication, a so-called "multipoint communication system", which is a system for simultaneously communicating between three or more communication terminal devices in a videophone / conference, has been used. When these methods are roughly classified into two,
A method that uses a multipoint control unit called MCU (Multipoint Control Unit) (hereinafter, MCU method)
And a method that does not use MCU (hereinafter, MCU-less method)
It can be classified into and.

First, the MCU system will be described below. FIG. 24 shows a conventional example of a connection form in the MCU system.
In FIG. 24, 200 to 204 are communication terminal devices (hereinafter, referred to as terminals) participating in multipoint communication, and 205 is I.
SDN communication network, 206 is MCU for controlling multipoint communication, 207 is MCU 206 and each terminal 200-204.
And one or two channels that connect and. This MC
In the U method, in addition to the terminals 200 to 204, the MCU 206 is used to realize multipoint communication. All terminals 2
00 to 204 are connected to the MCU 206, and the MCU
206 performs multipoint control and monitoring between each terminal, handles and synthesizes received data (voice, video, etc.) from each terminal as necessary, and transmits to each terminal.

Such an MCU system has the following problems. (1) Since an MCU is indispensable and the MCU is generally expensive, it takes a high cost to construct a system. (2) If the MCU cannot be used for some reason,
Multipoint connection cannot be established. (3) The capability of the MCU limits the number of terminals that can be connected and the communication speed. (4) In many cases, each terminal makes a call to and connects to the MCU, and a specific terminal cannot call another terminal.

One of the methods for partially solving the above problems
One of them is a MCU-less system. The MCU-less method will be described below with reference to FIG. In this MCU-less system, each terminal connects and communicates on an equal footing by using a loop shape, a chain shape, a star shape, or the like. The conventional example shown in FIG. 25 shows a case where the connections are made in a loop. In FIG. 25, one channel 207 is provided between the terminals 200 to 204.
Connected by. Each of the terminals 200 to 204 has two line interfaces. The terminal 200 is the terminal 201 and the terminal 204, the terminal 201 is the terminal 200 and the terminal 202, the terminal 202 is the terminal 201 and the terminal 203, and the terminal 203 is the terminal. 202 and terminal 204, terminal 204 is connected to terminal 203 and terminal 200, respectively.

In the case of a video conference, especially in ISDN, M
Between the CU and the video conference terminal, and between the video conference terminals,
The transfer of various media such as video, audio, and conference data is performed by ITU-T Recommendation H.264. 221 of H.221. 221 frames, and H.264. The 221 frame is transferred on the B channel of the ISDN basic interface.

FIG. 27 shows the ITU-T Recommendation H.264. 221 of H.221. 221 shows the structure of a 221 frame. In FIG. 27, 400 is an H.264 standard. 221 frames and 401 are H.264 between the transmitting and receiving video conference terminals. FAS (frame synchronization signal) for establishing frame synchronization of the 221 frame 400,
Reference numeral 402 denotes a BAS (bit rate allocation signal) for exchanging the communication capability and communication mode of the video conference terminal, and 403 is audio for the multi-point video conference, which is the audio of the video conference terminal of the own station and / or another station. A 24 kbps audio slot for transferring audio from the video conference terminal, 404
Is a data slot of 8 kbps for transferring conference data such as diagrams, tables, still images, pointing information, etc. for multipoint videoconferencing, and 405 is an image for multipoint videoconferencing, and is used as a video conference terminal of the own station. 30.4k for transferring video and / or video of video conferencing terminals of other stations
It is a video slot of bps.

Here, the voice slot 40 shown in FIG.
3, the slot widths of the data slot 404 and the video slot 405 are examples, and by exchanging the communication mode by the BAS 402, it is possible to select various combinations of slot widths according to the amount of information to be actually transferred. Has become.

In addition, H. The structure of the 221 frame 400 is an example in which one B channel of ISDN is used. When two B channels are used, each B channel is used as a first channel and an additional channel, and both channels are used. H. By transferring the 221 frame 400, it is possible to transfer information at a maximum of 128 kbps, which is effective when transferring enormous data or high-quality images.

[0010]

However, even in the ITU-T recommendation, the procedure for setting a communication path as in the conventional example by the MCU-less method of FIG. Methods and procedures tend to be complicated. That is, (1) it is not known which terminal will participate in multipoint communication. (2) I do not know which terminal should call which terminal. (3) It is necessary for the user to check the address of the call destination. (4) When the called terminal is busy, I do not know what to do. There is a problem such as.

As shown in FIG. 26, the address of the call destination is transmitted by some means so that the terminal 200 can remotely control the terminal 20.
4 calls, the reaction from the network is transmitted only to the terminal 204, so that the terminal 200 has a problem that the calling and connection status at that time cannot be known. That is, in the example of FIG. 26, the terminal 200 does not know that the terminal 204 is calling the terminal 203.

The present invention has been made to solve the above problems, and one operator promptly creates a communication path for multipoint communication, and the situation at the time of creation is transmitted to the operator. An object of the present invention is to provide a communication terminal device capable of performing the above.

[0013]

According to another aspect of the present invention, there is provided a communication terminal device, which comprises a participant list selecting means for selecting a participant list prepared for participation in multipoint communication prepared in advance, and the above participant list selecting means. A participant list transmitting means for transmitting the participant list selected by the means, and a callee address acquiring means for extracting and acquiring an address to be called from the participant list transmitted by the participant list transmitting means. It is provided.

A communication terminal device according to a second aspect of the present invention is a participant list selecting means for selecting a participant list prepared for participation in multipoint communication prepared in advance, and a participant selected by the participant list selecting means. A participant list transmitting means for transmitting the participant list through the information channel of the line and a callee address acquiring means for extracting and acquiring the address to be called from the participant list transmitted by the participant list transmitting means are provided. It is a thing.

A communication terminal device according to a third aspect of the present invention is a participant list selecting means for selecting a participant list prepared for participation in multipoint communication prepared in advance, and a participant selected by the participant list selecting means. Participant list transmitting means for transmitting the participant list, calling destination address obtaining means for extracting and obtaining an address to be called from the participant list transmitted by the participant list transmitting means, and obtaining the calling destination address Remote automatic call means for automatically making a call to the call destination address acquired by the means.

A communication terminal device according to a fourth aspect of the present invention is a participant list selecting means for selecting a participant list prepared for participation in multipoint communication prepared in advance, and a participant selected by the participant list selecting means. Participant list transmitting means for transmitting the participant list through the information channel of the line, and callee address obtaining means for extracting and obtaining the address to be called from the participant list transmitted by the participant list transmitting means, Remote automatic call means for automatically calling to the call destination address acquired by the call destination address acquisition means is provided.

[0017]

According to the invention of claim 1, a participant list participating in multipoint communication is selected, the participant list is transmitted, and a call destination address to be called is extracted from the transmitted participant list. ,get.

According to the second aspect of the present invention, a participant list participating in multipoint communication should be selected, the participant list should be transmitted through an information channel of a line, and a call should be made from the transmitted participant list. Extract and obtain the call destination address.

According to the invention of claim 3, a participant list participating in the multipoint communication is selected, the participant list is transmitted, and the call destination address to be called is extracted from the transmitted participant list. , And automatically calls the acquired call destination address.

According to the invention of claim 4, the participant list participating in the multipoint communication is selected, the participant list is transmitted through the information channel of the line, and the call originating from the transmitted participant list is made. Extracts and acquires the callee address, and automatically makes a call to the acquired callee address.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The first to fourth embodiments of the present invention will be described below with reference to the drawings. In the first to fourth embodiments,
It is assumed that a videophone terminal device (hereinafter referred to as a terminal) is used as the communication terminal device and four terminals are connected in a loop to perform multipoint communication. Moreover, ISDN is assumed as the line connecting the terminals.

FIG. 1 is a block diagram showing the configuration of a terminal used in the first to fourth embodiments.

In FIG. 1, reference numeral 1 denotes a CP which executes a program stored in the ROM 2 and controls the entire terminal.
U, 2 are ROMs in which programs for controlling the video conference terminals are stored, 3 are RAMs used for storing various data such as the multipoint connection list 13 and the work area of the CPU 1, 4 is this terminal An operation unit having input devices such as a keyboard, a tablet, a mouse, etc. used for inputting control information for performing control, 5 is a tone generator for generating tones such as ringback tones used for tone emulation, and a voice input. A voice input / output unit having a handset, a microphone, a speaker and the like as an output means for performing analog / digital conversion and digital / analog conversion processing of a voice signal, and 6 is a voice code defined in the ITU-T Recommendation G series. Performs encoding processing of the transmission voice signal and decoding processing of the reception voice signal according to the decoding / decoding algorithm. A voice encoding and decoding unit.

Reference numeral 7 denotes a CRT monitor which is an image input / output means,
An image input / output unit having a person camera, a document camera, etc., for performing analog / digital conversion and digital / analog conversion processing of image signals, and 8 for processing such as windowing, filtering, combining character data and / or graphic data. An image editing unit 9 for performing the ITU-T Recommendation H.264. 26
An image encoding / decoding unit that performs transmission image encoding processing and reception image decoding processing according to the image encoding / decoding algorithm defined in 1.

Reference numeral 10 denotes ITU-T Recommendation H.264. 221, the audio signal from the audio encoding / decoding unit 6, the image signal from the image encoding / decoding unit 9, the channel interface 1
2. Multiplexing processing for multiplexing various data signals input via 2 in transmission frame units according to the current communication capability and communication mode, and demultiplexing received frames into respective media of constituent units for voice coding / decoding The unit 6, the image encoding / decoding unit 9, and the demultiplexing unit for performing the demultiplexing process for notifying the channel interface 12 are connected to the ISDN line, and the line interface for controlling the line according to the ISDN user / network interface, 12 are A channel interface for connecting an external device such as a personal computer, 13 is one of the data stored in the RAM 3, and stores information (participant list) about each video conference terminal participating in the multipoint video conference. This is a multipoint list.

2 to 10 are examples of screen displays during operation of each embodiment, and FIGS. 11 and 12 are explanatory diagrams of tone emulation operation. 4 to 12, 500
Reference numerals 503 to 503 denote terminals having the configuration of FIG. 1 used in each embodiment.

13 to 15 and FIGS. 19 to 22 are flowcharts showing the operation of each embodiment. The outline of the operation is as follows: terminal 500 to terminal 501, terminal 501 to terminal 502, terminal 502 to terminal 503, and finally terminal 50.
A call is made from 3 to the terminal 500, a connection is made, and a communication path on the loop is completed.

FIG. 16 to FIG. 18 are sequences showing the connection processing. SETUP (call setting), ALERT (calling), CONN (response), CONNACK (response confirmation), CALLPROC (reception), REL (release), R
Each message of ELCOMP (release confirmation) is shown.

Next, the first embodiment will be described.

First, with reference to FIG. 13, the operation procedure of the terminal at the first caller in the loop (hereinafter referred to as the first caller) will be described. The terminal of the first caller is represented by terminal 500.

First, the multipoint list 13 is displayed on the image input / output section 7.
2 is displayed on the CRT monitor of FIG. 2, and the first caller selects a list to be activated by an input from the operation unit 4 (S101). (Hereafter, unless otherwise specified, "display"
Is displayed on the CRT monitor of the image input / output unit 7, and “user operation” is an operation input from the operation unit 4. )

Next, FIG. 3 is displayed, and if it is necessary to correct the list (S102, NG), the list is corrected by the user's operation (S103). If the list does not need modification (S
102, OK) or after the correction is performed, the screen of FIG. 4 is displayed and the user is asked whether or not the call can be really made (S
104). When canceling (S104, NG), this procedure is ended. When making a call (S104, OK), the tone emulation mode is turned off (S105),
The calling process is activated (S106), and the screen of FIG. 5 is displayed. This completes the calling procedure of the first calling party.

Next, the operation procedure when the terminal receives an incoming call will be described with reference to FIG.

When the terminal receives an incoming call (S301), the ITU
-T recommendation Q. According to the procedure of 931, the connection process as shown in FIG. 16 is performed (S302). If the connection is unsuccessful (S302, NG), this procedure ends. If the connection is successful (S302, OK), it is determined whether the incoming call is an incoming call for multipoint communication (S30).
3) If not, that is, if the incoming call is normal communication (S303, No), the normal communication is displayed (S319), and the present procedure is terminated.

In case of multipoint communication (S303, Y
es) is ITU-T Recommendation H.264. 221, the Bch is connected and synchronized (S304), and the audio input / output of the audio input / output unit 5 is opened to the connected Bch (S30).
5), the participant list is received in the data slot 404 (FIG. 27) (S306). Then, it is judged whether or not the own terminal is currently making the first call, and if not (S307, No), it is checked whether or not the address of the own terminal is included in the received participant list (S30).
8).

When the first call is made (S307, Y
In es), the participant list transmitted by the first call is compared with the received participant list (S316). If they match (S316, match), it means that the loop is completed. Therefore, the screen of FIG. 10 is displayed (S317), and this procedure ends. If they do not match (S316, mismatch), it is displayed that the incoming call is in the process of activating multipoint communication (S318),
This procedure ends.

When the participant list received in S308 does not include the address of the terminal itself (S308, No), it is displayed that the incoming call is an unauthorized multipoint communication (S315), and Finish the procedure. When the address of the own terminal is included (S308, Yes), it is displayed that the communication is multipoint communication (S309), the tone emulation mode is turned on (S310), and the call processing is performed (S311). ). The ITU-T Recommendation H.264. In accordance with the procedure of 221, the Bch is connected and synchronized (S312), and the audio input / output of the audio input / output unit 5 is opened to the connected Bch (S313), and the data slot 404 (FIG. 27).
To send a list of participants for multipoint communication (S31
4).

Further, referring to FIG. 15, S106 and S3
The calling process 11 will be described in detail.

First, the information in the current participant list is searched (S201), the next call destination is determined, and the call destination address is acquired (S202). Then, a SETUP message is created (S203), transmitted (S204), and ITU-
T. Recommendation Q. A connection process is performed according to 931 (S20).
5). A typical sequence of connection processing is shown in FIGS.
Shown in At this time, in FIG. 17, a ringback tone is supplied from the line to the terminal making a call from the time of receiving the ALERT message to the time of receiving the CONN message. When the tone emulation mode is ON (S206, ON), the voice input / output unit 5 rings the terminal in communication as shown in FIGS. 11 and 12 at the timing of the ringback tone supply. The back tone is emulated (S207). At this time, the terminal 500 in FIG. 11 and the terminals 500 and 5 in FIG.
In 01, the emulated ringback tone is output from the opened voice input / output unit 5.

When the connection processing is normally completed as shown in FIG. 17 (S208, OK), Bch is connected (S2).
09), Bch to which the audio input / output of the audio input / output unit 5 is connected
To the data slot 404 (S210).
The participant list for multipoint communication is transmitted in (Fig. 27) (S
211), the connection is completed (S212), and this processing is ended.

Further, when the connection fails as shown in FIG. 18 (S208, NG), the reason display information element (hereinafter, cause) of the first received disconnection type message (REL message in FIG. 18) is detected, Check (S21
3).

If cause is "no empty channel" (S214), it is displayed that there is no line available for the terminal itself (S215), and this process is terminated (S216). If cause is "user busy" (S217), it is displayed that the call destination is busy (S217).
218), and asks the user whether to skip the busy terminal and change the call destination (S219). When changing (S
219, OK), the address of the call destination is changed to the next address in the participant list, and is acquired (S220), and the process returns to S203. When the call destination is not changed (S219, NG), this process ends (S221). If the cause is other (S222), a message indicating that the connection has failed is displayed (S222).
223), and this processing ends (S224).

By appropriately performing the above operation procedure at each terminal, a communication path for multipoint communication is set. 6 to 9
Shows a display example in the process in which the second caller creates a loop by the above operation procedure. The same display is made during the loop creation of the third and fourth callers, and FIG. 10 is displayed when the loop is completed.

Next, a second embodiment of the present invention will be described. Screen display during operation in the second embodiment is performed in the same manner as in FIGS. Also, the operation procedure of the first calling party (terminal 500) in the loop is performed similarly to FIG.

Next, the operation procedure when the terminal receives an incoming call will be described with reference to FIG.

When the terminal receives an incoming call (S501), the incoming call process is activated (S502). As a result, it is determined whether the incoming call is an incoming call for multipoint communication (S50).
3) If it is different (that is, a normal incoming call for communication) or if the connection has failed (S503, No), the incoming call procedure is terminated. In case of multipoint communication (S503, Ye
s) judges whether or not the terminal is currently making the first call, and if not (S504, No), the tone emulation mode is turned on (S505) and the call processing is performed (S506). , Terminate the incoming call procedure.

When the first call is made (S504, Y
In es), the participant list transmitted by the first call is compared with the received participant list. If they match (S507,
(Matching) means that the loop is completed, so the screen of FIG. 10 is displayed and the incoming call procedure is terminated (S508). If they do not match (S507, mismatch), it is displayed that the incoming call is being activated for multipoint communication (S509), and the incoming call procedure is terminated.

S106 of FIG. 13 and S506 of FIG.
The calling process of FIG. 15 is performed in substantially the same manner as in FIG.
The processing of “participant list transmission” by 211 is not performed,
After the audio input / output is opened to the connected Bch in S210, the connection is completed in S212.

Next, the incoming call processing of S502 will be described in detail with reference to FIG.

When the SETUP message is received (S4
01), ITU-T Recommendation Q. According to the procedure of 931, the connection process as shown in FIG. 16 is performed (S402). If the connection has failed (S402, NG), this processing ends. If the connection is completed normally (S402, OK),
The user user information element of the SETUP message is searched, and it is checked whether or not the participant list is included to determine whether it is multipoint communication (S403). If the communication is not the multipoint communication but the normal communication (S403, N
o), normal communication is displayed (S410), and this processing ends (S411).

In case of multipoint communication (S403, Y)
In es), the participant list is acquired (S404), and it is checked whether or not the address of the own terminal is included in the list (S405). If included (S405, Yes)
Indicates that it is multipoint communication (S406), and Bc
h is connected (S407), the voice input / output of the voice input / output unit 5 is opened to the connected Bch (S408), and this processing ends (S411). If the address of the terminal is not included in the participant list (S405, No),
Since this is an unauthorized incoming call for multipoint communication, it is displayed (S409), and this processing ends (S411).

A communication path for multipoint communication is set by appropriately performing the above operation procedure at each terminal.

Next, a third embodiment of the present invention will be described.

First, the operation procedure of the terminal at the first caller in the loop will be described with reference to FIG.

First, the multipoint list 13 is displayed on the CRT monitor of the image input / output unit 7 as shown in FIG. 2, and the first caller selects a list to be activated by an input from the operation unit 4 (S601). . Next, FIG. 3 is displayed, and if the list needs correction (S602, NG), the correction is performed by the user's operation (S603). If the list does not need to be modified (S602, OK), or after the modification is made, the calling process is activated (S604). If the connection is normally completed after the calling process is completed (S605, OK), the ITU-T
Recommendation H. In accordance with the procedure of 221, Bch is connected and synchronized (S606), and the participant list of multipoint communication is transmitted through the data slot 404 of FIG. 27 (S607). This completes the calling procedure of the first calling party.

The operation procedure when the terminal receives an incoming call is shown in FIG.
4, the tone emulation mode is not performed, and the "voice input / output open" process of S305 and S313 and the "tone emulation ON" process of S310 in FIG. 14 are omitted.

Further, referring to FIG. 22, S604 and S311
The call processing of will be described in detail.

First, the information in the current participant list is searched (S701), the next call destination is determined, and the call destination address is acquired (S702). When the next call destination is not the first caller (S703, No), the screen of FIG. 4 is displayed and the user is asked whether the call may be made (S704). When the call is not made (S704, NG), this process is interrupted and ended there (S709). When making a call (S704, O
K), a SETUP message is created (S705).
If Yes in S703, S70 is performed without performing S704.
Execute 5.

Then, a SETUP message is transmitted (S706), and the ITU-T recommendation Q. Connection processing is performed according to the procedure of 931 (S707). A typical sequence of connection processing is shown in FIGS. 17 and 18. However, ring back tone is not performed in FIG. When the connection processing is normally completed as shown in FIG. 17 (S707, OK), the connection between the terminals is completed (S708), and this processing is ended. When the connection fails as shown in FIG. 18 (S707, N
G), the reason display information element (hereinafter, cau) of the first disconnection-type message (REL message in FIG. 18) received.
se) is detected and checked (S710). Below, S
Each processing of 711 to S721 is performed by S214 to S2 of FIG.
It is performed in the same manner as each processing of 24. By performing the above operation procedure on each terminal, a communication path for multipoint communication is set.

Next, a fourth embodiment of the present invention will be described.

In this embodiment, the operation procedure of the terminal of the first caller in the loop is S104 and S105 in FIG.
“Calling OK?” And “Tone emulation OFF” are omitted. That is, in FIG. 13, S10
2. If the list is not modified by OK, S1
When the list is modified by 03, the call processing of S106 is immediately performed in each case.

The operation when an incoming call is received is shown in FIG.
The processing of "tone emulation ON" of S505 in step S505 is omitted. That is, if the first call is not made in S504, the call process of S506 is immediately performed.

Further, the calling processing in S106 and S506 is performed exactly the same as in FIG. However, in the connection processing of FIG. 17, the ring back tone is not supplied.

The incoming call processing is S40 in FIG.
7. The processes of “Bch connection” and “voice input / output open” in S408 are omitted. That is, in S406, it is displayed that the communication is multipoint communication, and the process ends. By performing the above operation procedure on each terminal, a communication path for multipoint communication is set.

The first to fourth embodiments can be applied not only to the loop-shaped but also the chain-shaped communication path for the intended multipoint communication.

In the first, second, and fourth embodiments, the participant list for multipoint communication is added to the user user information element to transmit the participant list, but the participant list is used as the sub-address information element. Alternatively, the participant list may be transmitted.

In the first and third embodiments described above, the case where ISDN is used as the line has been described, but in addition, the ARCHINE SWITC which is an American digital line is used.
It is also applicable to H56 and the like.

Further, in the above-mentioned first and second embodiments, the tone may be emulated as needed during the call origination by the remote automatic call origination means.

FIG. 23 is a block diagram functionally and schematically showing a terminal device of the present invention which performs the above-mentioned operation. FIG. 23
In 20, 20 is storage means for storing a list of participants participating in multipoint communication, 21 is participant list selecting means for selecting the participant list of the storing means, and 22 is selected by the participant list selecting means. Participant list transmitting means for transmitting the participant list through the information channel of the line; 23 is a callee address acquiring means for extracting and acquiring an address to be called from the participant list transmitted by the participant list transmitting means; Reference numeral 24 is a remote automatic calling means for automatically calling to the call destination address acquired by the call destination address acquisition means.

Reference numeral 25 is a call-destination automatic changing means for deciding whether or not the call-destination should be changed according to the reason display information element of the disconnection message from the network when the call fails during the connection of the multipoint communication. Reference numeral 26 is a loop final path automatic setting means for automatically setting the last communication path when the shape of the multipoint communication is a loop, and 27 is as necessary during the calling by the remote automatic calling means. It is a tone emulation means that emulates a tone.

The storage means 20, the call destination address acquisition means 23, the remote automatic call means 24, and the call destination automatic change means 2
5. The loop final path automatic setting means 26 is the CPU 1 of FIG.
And a ROM2 and a RAM3, a participant list selecting means 21 is composed of an operating section 4 and an image input / output section 7, and a participant list transmitting means 22 is a CPU1, ROM2,
The tone emulation means 27 includes a RAM 3 and a line interface 11, and the tone emulation means 27 includes a CPU 1, a ROM 2 and an RA.
It is composed of M3 and voice input / output unit 5.

[0072]

As described above, according to the communication terminal device of the invention of claim 1, the participant list participating in the multipoint communication is selected, and the selected participant list is transmitted and transmitted. By extracting and acquiring the call destination address to call from the participant list, the user can easily determine which terminal participates in multipoint communication and which terminal should call which terminal. Therefore, there is an effect that a quick operation procedure can be obtained at the time of setting a communication path for multipoint communication, without having to check the address of the call destination to which the user should make a call.

According to the communication terminal device of the invention of claim 2,
By selecting a participant list to participate in multipoint communication, transmitting the selected participant list through the information channel of the line, and extracting and acquiring the callee address to be called from the transmitted participant list , The user can easily know which terminal participates in multipoint communication and which terminal should call which terminal, and the address of the call destination to which the user should call. It is possible to obtain a quick operation procedure when setting a communication path for multipoint communication, and to use no special control and service on the control channel.

According to the communication terminal device of the invention of claim 3,
Select a participant list to participate in multipoint communication, transfer the selected participant list, extract and acquire a call destination address to be called from the transferred participant list, and acquire the above By automatically calling the destination address, the user can determine which terminal will participate in multipoint communication.
Also, it becomes possible to easily know which terminal should call which terminal, and it is not necessary to check the address of the call destination to which the user should make a call. There is an effect that a call can be made and, as a result, a communication path for multipoint communication is automatically set.

According to the communication terminal device of the invention of claim 4,
Select a participant list to participate in multipoint communication, transfer the selected participant list through the information channel of the line, extract, acquire, and acquire the callee address to call from the transferred participant list. By automatically calling the designated call destination address, the user can easily know which terminal participates in multipoint communication and which terminal should call which terminal. It is possible, and you do not need to check the address of the call destination you should call, you can make a remote call to another terminal, and as a result, a communication path for multipoint communication is automatically set. In addition, there is no need to use special control and service on the control channel.

According to the communication terminal device of the invention of claim 5,
When the call is unsuccessful, the user can be notified if the participant of the multipoint communication is busy by determining whether to change the call destination by the reason display information element of the disconnection message from the network. Is easier to understand,
As a result, the communication path for multipoint communication can be set quickly.

According to the communication terminal device of the invention of claim 6,
When the shape of the multipoint communication is a loop, the last communication path is automatically set, so that the loop communication path can be set quickly.

According to the communication terminal device of the invention of claims 7 and 8, when the participant list is transmitted, the participant list is transmitted by the user user information element or the sub-address information element included in the SETUP message. There is an effect that it can be transmitted easily and surely.

According to the communication terminal device of the invention of claim 9,
When making a call automatically to the call destination address, the operator can grasp the status of the call being made by emulating the line tone as necessary, which creates a safe operating environment. It has the effect of being obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a communication terminal device in first to fourth embodiments of the present invention.

FIG. 2 is a configuration diagram showing a screen display during operation of each embodiment.

FIG. 3 is a configuration diagram showing a screen display during operation of each embodiment.

FIG. 4 is a configuration diagram showing a screen display during operation of each embodiment.

FIG. 5 is a configuration diagram showing a screen display during operation of each embodiment.

FIG. 6 is a configuration diagram showing a screen display during operation of each embodiment.

FIG. 7 is a configuration diagram showing a screen display during operation of each embodiment.

FIG. 8 is a configuration diagram showing a screen display during operation of each embodiment.

FIG. 9 is a configuration diagram showing a screen display during operation of each embodiment.

FIG. 10 is a configuration diagram showing a screen display during operation of each embodiment.

FIG. 11 is a configuration diagram for explaining tone emulation of a line in the first and second embodiments.

FIG. 12 is a configuration diagram for explaining tone emulation of a line in the first and second embodiments.

FIG. 13 is a flowchart showing a procedure when a first caller makes a call in the first, second, and fourth embodiments.

FIG. 14 is a flowchart showing a procedure when an incoming call is received in the first and third embodiments.

FIG. 15 is a flowchart showing a flow of a calling process in the first and second embodiments.

FIG. 16 is a diagram showing the ITU-T recommendation Q.10 when the connection by the incoming call is successful in each embodiment. It is explanatory drawing which shows the sequence of the layer 3 message of 931.

FIG. 17 shows the ITU-T recommendation Q.10 when the connection by calling is successful in each embodiment. It is explanatory drawing which shows the sequence of the layer 3 message of 931.

FIG. 18 shows the ITU-T recommendation Q.10 when the connection due to a call fails in each embodiment. It is explanatory drawing which shows the sequence of the layer 3 message of 931.

FIG. 19 is a flowchart showing a procedure when an incoming call is received in the second and fourth embodiments.

FIG. 20 is a flowchart showing the flow of incoming call processing in the second and fourth embodiments.

FIG. 21 is a flow chart showing a procedure when a first caller makes a call in the third embodiment.

FIG. 22 is a flowchart showing the flow of calling processing in the third and fourth embodiments.

FIG. 23 is a block diagram that functionally and schematically summarizes each example.

FIG. 24 is a configuration diagram showing an example of a form of conventional multipoint communication.

FIG. 25 is a block diagram showing an example of a conventional multipoint communication mode.

FIG. 26 is a block diagram showing an example of a conventional multipoint communication mode.

FIG. 27: ITU-T Recommendation H.264 221 of H.221. It is explanatory drawing which shows the structure of a 221 frame.

[Description of Codes] 1 CPU 2 ROM 3 RAM 4 Operation unit 5 Voice input / output unit 6 Voice encoding / decoding unit 20 Storage means 21 Participant list selection means 22 Participant list transmission means 23 Call destination address acquisition means 24 Remote Automatic calling means 25 Automatic calling destination changing means 26 Loop final path automatic setting means 27 Tone emulation means

Claims (9)

[Claims] 1. A storage unit for storing a list of participants participating in multipoint communication, a participant list selection unit for selecting a participant list of the storage unit, and a participation selected by the participant list selection unit. A communication terminal device comprising: participant list transmitting means for transmitting a participant list; and callee address obtaining means for extracting and obtaining an address to be called from the participant list transmitted by the participant list transmitting means. 2. A storage unit for storing a participant list for participating in multipoint communication, a participant list selecting unit for selecting the participant list of the storing unit, and a participation selected by the participant list selecting unit. A participant list transmitting means for transmitting the participant list via the information channel of the line, and a callee address acquiring means for extracting and acquiring an address to be called from the participant list transmitted by the participant list transmitting means. Communication terminal equipment. 3. Storage means for storing a list of participants participating in multipoint communication, participant list selecting means for selecting a participant list of the storage means, and participation selected by the participant list selecting means. Participant list transmitting means for transmitting the participant list, calling destination address obtaining means for extracting and obtaining an address to be called from the participant list transmitted by the participant list transmitting means, and obtaining the calling destination address And a remote automatic calling means for automatically calling the call destination address obtained by the means. 4. Storage means for storing a list of participants participating in multipoint communication, participant list selecting means for selecting the participant list of the storage means, and participation selected by the participant list selecting means. A participant list transmitting means for transmitting the participant list through a line information channel; a callee address obtaining means for extracting and obtaining an address to be called from the participant list transmitted by the participant list transmitting means; A communication terminal device comprising: a remote automatic calling means for automatically calling to a calling destination address acquired by the calling destination address acquiring means. 5. A call destination automatic changing means for deciding whether or not to change the call destination according to the reason display information element of the disconnection type message from the network when the call fails during the connection of the multipoint communication. The communication terminal device according to claim 1, 2, 3, or 4. 6. A loop final path automatic setting means for automatically setting the last communication path when the shape of the multipoint communication is a loop.
Alternatively, the communication terminal device according to item 5. 7. The communication terminal device according to claim 1, 3 or 5, wherein in the participant list transmitting means, the participant list is transmitted by a user user information element included in the SETUP message. 8. The communication terminal device according to claim 1, 3 or 5, wherein the participant list transfer means transfers the participant list by a sub-address information element included in the SETUP message. 9. The communication terminal device according to claim 3, further comprising tone emulation means for emulating a tone as needed during a call made by said remote automatic call means.