JP2007068078A - Communication system, portable terminal, server, and communication method - Google Patents

Abstract

Provided is a communication system that can easily know the timing of making a request for speech and that does not reproduce inadvertent data at the transition of received data even when communication is performed by a plurality of terminals.
The communication system is a communication system that performs PoC communication by connecting a plurality of mobile terminals and a server, and a user who has acquired the right to speak when the right to speak is changed. Alternatively, data that makes it possible to identify a user who has abandoned the right to speak, or data that does not adversely affect data at the time of first speaking is distributed to a plurality of portable terminals.
[Selection] Figure 6

Description

  The present invention relates to a communication system, a mobile terminal, a server, and a communication method, and more particularly, to communication of a plurality of mobile terminals by PoC communication.

  Push-to-Talk (abbreviated as PTT) technology and service is one of so-called VoIP (Voice over IP) that uses the Internet protocol to make a call over a data communication network, and is a mobile phone or PDA (Personal Digital). Assistant) has been developed for portable terminals (see Patent Document 1). In particular, for mobile phones, “Push-to-Talk over Cellular (PoC) Phase One” has been submitted and standardization is being promoted by the Open Mobile Alliance (OMA), an industry group.

  Instead of calling with a unique number such as a phone number to start a conversation, PTT can connect within 1 second by selecting a pre-registered caller and pressing the call button. When a one-way call is made and the call button is released, the other party presses the call button to make a call. Mutual conversation is performed by executing this alternately. According to the PTT, dialing and connection to a network are unnecessary, so that it can be used more quickly and cheaply than a normal call.

Further, as described above, not only one-to-one exchanges but also speaking parties can be grouped and simultaneously connected to a plurality of other parties. In this case, since the voice from the terminal that is pressing the call button is transmitted to all the remaining terminals, the message from the caller can be heard at the same time as in a conference call.
JP 2005-117197 A

By the way, when transmitting a videophone or a still image by applying PoC, the received image changes one after another as the speaker changes one after another.
Here, if a speaker's speech ends and the next speaker's data is received, paying attention to the transition, the previous speaker's data may remain and may adversely affect the start of the next received data. was there.

  Further, when the speech is finished, the line becomes silent or no signal. In this case, there is a problem that it is impossible to determine whether someone is silent with someone who has the right to speak or whether the line is clear because no one has requested to speak, and the timing for making a request for speech cannot be measured. It was.

  The present invention has been made in consideration of the above-described circumstances, and can easily know the timing for making a request for speech, and inadvertent data at the transition of received data even when communication is performed by a plurality of terminals. It is an object of the present invention to provide a communication system, a portable terminal, a server, and a communication method that do not reproduce the video.

In order to solve the above problems, the present invention is configured as follows.
When communicating by PoC by connecting a plurality of mobile terminals and a server, it is possible to identify a user who has acquired the right to speak or a user who has abandoned the right to speak when the right to speak is changed. Or additional data that does not adversely affect the data that was initially spoken.
In addition, specific data indicating data that does not have an adverse effect may be distributed and output so that the mobile terminal that has received the specific data does not have an adverse effect.
The time point at which this additional data is sent is either when the right to speak is acquired, when the right to speak is abandoned, or both.

  Additional data to be transmitted includes mute data and user-specific data (for example, a user-specific logo, mark, video clip, animation, song, sound effect, etc.), and one or more may be used in combination. .

These additional data may be distributed as fixed data, or a plurality of selected additional data may be distributed in order or randomly.
Further, the transmission of the additional data may be stopped after a predetermined reproduction time or a predetermined number of reproductions, or it is continuously distributed and stopped when an actual statement is made. You may do it.

The additional data may be held in the portable terminal, and may be transmitted from the portable terminal to the server and distributed to other portable terminals when the speaking right is requested or the right to speak is abandoned.
Alternatively, the additional data may be held in the server and distributed from the server when the speaking right is requested from the portable terminal or when the speaking right is abandoned.

According to the present invention, in PoC communication, it is possible to easily know the timing for making a floor request.
Even if communication is performed by a plurality of portable terminals, inadvertent data (video / audio disturbance, unintended video / audio, etc.) is not reproduced at the transition of received data.

Hereinafter, preferred embodiments according to a communication system, a mobile terminal, a server, and a communication method of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing a system configuration of a communication system according to the present invention, in which the communication system includes a plurality of base stations 300, a plurality of mobile terminals 100, a base station control device 400, and a PoC server 200. Is included. The base station 300 operates as a relay station when the mobile terminals 100 in the base zone (base station communication area) communicate with each other, and communicates with the mobile terminal 100 in the base zone as a partner station. The base station control device 400 manages the plurality of base stations 300 and relays communication between the mobile terminals 100 connected to different base stations 300.

  The PoC server 200 is connected to the base station control device 400 via an IP network, manages PoC users and groups, and executes a PoC control function or a PoC participation function, thereby providing an application level network function for a PoC service. Is realized. In addition, the PoC server 200 executing the PoC control function has SIP sessions as many as the number of participants of the mobile terminal 100, and the speech from the mobile terminal 100 is controlled by one PoC session. The PoC control function and the PoC participation function communicate, and the PoC participation function communicates directly with the mobile terminal 100.

  Next, the configuration of the mobile terminal 100 will be described with reference to FIG. When the mobile terminal 100 performs radio communication with a base station via radio waves, the mobile terminal 100 receives and transmits voice, text, image, video data, and the like from the base station via the antenna 1 during reception. Data is demodulated, and at the time of transmission, the data sent from the communication control unit 3 is modulated and amplified, and the radio unit 2 that transmits to the base station via the antenna 1 and the received data demodulated by the radio unit 2 A communication control unit 3 to be sent to the main control unit 12 based on a predetermined communication protocol, an operation unit 4 for inputting various information including data input and function selection instructions such as numbers and characters, a control program, fixed data, etc. ROM, a semiconductor memory such as RAM, which is a working storage area of the CPU, and a hard disk, etc., and stores various types of information (characters, images, sounds, sounds, videos, etc.) received or input A storage unit 5, a PTT switch 6 for instructing start and end of communication by PTT, a video processing unit 7 for performing predetermined signal processing on video transmitted and received by the wireless unit 2, and information input by the operation unit 4 A display unit 8 for displaying information read from the storage unit 5 and received video information, an audio processing unit 9 for performing predetermined signal processing on an audio signal included in a radio signal transmitted and received by the radio unit 2, and a user Is composed of a microphone 10 for inputting an audio signal from a speaker, a speaker 11 for outputting received voice and operation sound, and a main control unit 12 for controlling the operation of the entire apparatus.

  The PTT switch 6 is a switch for using the PTT technology and service. The PTT switch 6 is provided on the side surface of the mobile terminal 100 as shown in FIG. 3 and is pressed when a request for speech is made or data is transmitted. To release when data transmission is completed.

The operation of the communication system on which the present invention is based will be described with reference to FIGS.
FIG. 4 shows a procedure when the terminal A performs PoC communication with the terminals B, C and D in the same group, and FIG. 5 shows a data flow between each terminal and the PoC server.
First, a PoC application is called on the terminal A, a communication partner user or group is selected from the displayed telephone directory, and a PTT switch is pressed.
When the terminal A pushes the PTT switch, a request to speak is sent to the PoC server.
The PoC server permits the terminal A to speak and returns the speech permission to the terminal A when no user speaks in the selected user or in the group and there is no request for the right to speak from another terminal. .

The terminal A that is allowed to speak transmits data (voice, image, text, video, etc.) to the PoC server.
The PoC server transmits data sent to terminals (B, C, D) of other members of the same group of the terminal A.
When the PoC application is running on the terminal B, the terminal C, and the terminal D and the same group is selected, the data from the PoC server is only received, and the data transmitted by the terminal A is received. And output to the display unit and the speaker. Thereby, the same content transmitted by the terminal A can be received and displayed in real time.
When the user of terminal A releases the PTT switch, the right to speak is sent to the PoC server.
In the PoC server, when utterance right abandonment is sent from the terminal A, the utterance right of the terminal A is extinguished and a utterance request from another terminal can be accepted.

Next, when the terminal B wants to speak, the PTT switch is pressed in the same manner to make a speech request, and when permitted, data (voice or image) is transmitted. The data transmitted by terminal B can only be received by terminal A, terminal C and terminal D.
Thereafter, data such as voice and video can be exchanged between users in the group by pressing the PTT switch when requesting the right to speak and releasing the PTT switch when giving up the speech.

<Embodiment 1>
In a communication system using a conventional PoC, when a TV phone or a still image is transmitted, the received image changes one after another as the speaker changes one after another.
Here, if a speaker's speech ends and the next speaker's data is received, paying attention to the transition, the previous speaker's data may remain and may adversely affect the start of the next received data. was there.
Further, when the speech is finished, the line becomes silent or no signal. In this case, there is a problem that it is impossible to determine whether someone is silent with someone who has the right to speak or whether the line is clear because no one has requested to speak, and the timing for making a request for speech cannot be measured. It was.

In the first embodiment, in order to solve these problems, when the floor is acquired or the floor is abandoned, mute data or data specified by the user is inserted before and after the data to be transmitted. Even if the inserted data sounds or appears to be destroyed, it does not adversely affect the data that is originally transferred.
In addition, by inserting user-specific data before and after the data to be transmitted, it is possible to identify who is communicating or who has abandoned the right to speak.

  FIG. 6 is a block diagram showing a functional configuration of the communication system according to Embodiment 1 of the present invention. In the figure, in addition to the PoC client function, the mobile terminal 100 includes a PTT switch state detection unit 110, a floor acquisition unit 120, a speech unit 130, a reception unit 140, an output unit 150, an additional data transmission unit 160, additional data. The storage unit 170 and the speaking right abandonment unit 180 are included.

  The PTT switch state detection unit 110 detects that the user has pressed the PTT switch 6 of the mobile terminal 100, and outputs a floor request signal to the floor acquisition unit 120. Further, when it is detected that the PTT switch 6 has been released, a right to waiver signal is output to the right to waiver unit 180.

The floor acquisition unit 120 receives the floor request signal passed from the PTT switch state detection unit 110 and transmits the floor request to the PoC server 200. Information for identifying the right to speak, information for identifying the communication partner user, or information for identifying the group is added to the right to speak.
When a speech permission is returned from the PoC server 200, the output unit 150 outputs a speech permission message to the display unit 8 or the speaker 11 and activates the speech unit 130.
In addition, when a speech non-permission is returned from the PoC server 200, the output unit 150 outputs a message indicating that the speech is not permitted to the display unit 8 or the speaker 11, and confirms that the user releases the PTT switch 6. Wait until the PTT switch 6 is pressed again.

When the speaking unit 130 is activated from the speaking right acquisition unit 120, the speaking unit 130 transmits data (sound, image, text, video, etc.) that the user wants to send to the PoC server 200. Information for identifying a message, information for identifying a communication partner user, or information for identifying a group is added to this data.
By speaking using the microphone 10, the voice collected by the microphone 10 is transmitted to the PoC server 200. Alternatively, when it is desired to send a video, the video and audio shot by the imaging device connected to the mobile terminal 100 are sent to the PoC server 200.

The receiving unit 140 receives data sent from the PoC server 200 when the mobile terminal 100 has not acquired the right to speak.
The output unit 150 outputs the data received by the receiving unit 140 to the speaker 11 in the case of audio, and outputs the data to the display unit 8 in the case of a video or an image.

  The floor waiver unit 180 receives the floor waiver signal passed from the PTT switch state detector 110, and transmits the floor waiver request to the PoC server 200, thereby extinguishing the floor of the mobile terminal 100. . Information for identifying the right to abandon request, information for identifying the user of the communication partner, or information for identifying the group is added to this right to abandon request.

The additional data transmission unit 160 refers to the additional data storage unit 170 and transmits data to be added before and after the data to the PoC server 200 when the floor is requested or when the floor is abandoned.
The additional data transmission unit 160 and the additional data storage unit 170 will be described later.

  Next, in FIG. 6, the PoC server 200 includes a floor control unit 210, a group management unit 220, a reception unit 230, and a distribution unit 240 in addition to the functions of the PoC server.

In the group management unit 220, the status related to users and groups who perform PoC communication using the PoC server 200 is registered. For example, the group management unit 220 includes, for each user, a user name, information for identifying the user (user ID), an address of a mobile terminal possessed by the user, and a flag indicating whether or not the user has acquired the right to speak. Etc. are remembered.
In the case of a group, for each group, a group name, information for identifying the group (group ID), and a user list belonging to the group (a list of information for identifying the user) are stored. The group management unit 220 registers users and groups prior to PoC communication.

The floor management unit 210 receives the floor request from the mobile terminal 100, refers to the group management unit 220, determines whether to permit the speech, and returns a message to that effect to the requesting mobile terminal. .
In the case of one-to-one communication, if the communication partner's floor acquisition flag is on, a speech non-permission signal is returned to the requesting mobile terminal 100, and the communication partner's floor acquisition flag is off. If there is, a speech permission signal is returned to the requesting mobile terminal 100.
Further, in the case of group communication, it is checked whether the speaking right acquisition flag of any user belonging to the group ID added to the speaking right request is on. When there is no user whose speaking right acquisition flag is turned on, a speaking permission signal is returned to the requesting mobile terminal 100. When there is a user whose speaking right acquisition flag is turned on, a speech non-permission signal is returned to the requesting mobile terminal 100.

  Further, the speaking right management unit 210 receives a speaking right abandonment request from the portable terminal 100, refers to the group management unit 220, and updates the speaking right acquisition flag of the user of the portable terminal 100 to off.

  When receiving data from the speaker's mobile terminal 100, the receiving unit 230 passes the received data to the distribution unit 240. Here, the information passed to the distribution unit 240 is data to be transferred, the address of the mobile terminal that has transmitted, the user ID or group ID of the transmission partner.

In the case of one-to-one communication, the distribution unit 240 refers to the group management unit 220 from the user ID of the transmission partner passed from the reception unit 230 and extracts the address of the transmission destination portable terminal, and stores the data to this address. To deliver.
Further, in the case of group communication, the distribution unit 240 refers to the group management unit 220, extracts the address of the mobile terminal of the user participating in the conference from the group ID passed from the reception unit 230, and transmits it. Only the original address is deleted, and the data is distributed to all mobile terminals 100 at the remaining addresses.

Next, the additional data transmission unit 160 and the additional data storage unit 170, which are features of the present invention, will be described.
One or more types of additional data are stored in the additional data storage unit 170, and there are one prepared in advance by this system and one prepared by the user.
The additional data includes, for example, silent mute data in the case of voice data, or sound data unique to the user (for example, a call voice unique to the user “Here is AAA”, a song, a melody, a sound effect, etc.) In the case of image data, black image mute data or image data that can identify the user name, or in the case of video data, black image mute data or user-specific video data (logo, mark, video clip, Animation).

These additional data are not only stored in the mobile terminal 100 in advance, but are used by being acquired via a memory card or a network, and the acquired additional data is temporarily recorded in the additional data storage unit 170. Some use it later.
In addition, a code that can identify the mute data may be assigned to the specifically determined mute data, and this code may be transmitted instead of transmitting the mute data.

These additional data are distributed to communication partners or group members participating in the conference at the next time point.
(1) When the right to speak is requested:
When the floor is acquired by the floor acquisition unit 120, the additional data transmission unit 160 is activated to transmit additional data to the PoC server 200, and at the same time, the speech unit 130 is activated. Of course, when the additional data is not transmitted at the start of the speaking right, the speaking unit 130 is activated immediately, and the speaking data can be immediately transmitted.

The additional data transmission unit 160 takes out the additional data from the additional data storage unit 170 and repeatedly transmits the additional data to the PoC server 200 until the message data is sent from the message unit 130 for the first time.
The retrieval of the additional data may be selected in advance by the user from the additional data storage unit 170, may be fixedly determined by the system, or stored in the additional data storage unit 170. The additional data may be selected at random. Further, both data prepared by the system and data designated by the user may be selected.
Further, instead of sending mute data, a specific code may be assigned and this code may be sent. In this case, when each mobile terminal 100 receives this code, the mobile terminal itself mutes itself.
For example, as shown in FIG. 7A, when sending image data, image mute data or image data designated by the user may be sent together as the first additional data of a message.

(2) When the right to speak is abandoned:
The speaking right abandonment unit 180 activates the additional data transmission unit 160, and after transmitting the additional data, transmits a speaking right abandonment request to the PoC server 200, and the right to speak is abandoned. Of course, when the additional data is not transmitted at the time of utterance of the right to speak, a right to waiver is sent to the PoC server 200, and the right to speak is immediately relinquished.

The additional data transmission unit 160 takes out the additional data from the additional data storage unit 170 and transmits it to the PoC server 200 for a predetermined time or a predetermined period.
The retrieval of the additional data may be selected in advance by the user from the additional data storage unit 170, may be fixedly determined by the system, or stored in the additional data storage unit 170. The additional data may be selected at random. Further, both data prepared by the system and data designated by the user may be selected.
Further, instead of sending mute data, a specific code may be assigned and this code may be sent. In this case, when each mobile terminal 100 receives this code, the mobile terminal itself mutes itself.
For example, as shown in FIG. 7B, when sending video data, video mute data or video data designated by the user may be sent as additional data at the end of the message.

As described above, it is also possible to send the additional data to the PoC server 200 at the same time as the request to abandon the right to speak instead of making a request to abandon the right to speak after the transmission of the additional data ends.
In this case, the PoC server 200 abandons the right to speak of the mobile terminal (user) that has sent the right to speak, and is not a member who has abandoned the right to speak while there is no right to speak from another mobile terminal 100. Additional data is distributed to all members of the group. The distribution of the additional data is stopped when a request to speak is received from another mobile terminal 100. With such a configuration, it becomes possible to accept a request to speak from another portable terminal.

  In addition, a request to abandon the right to speak is sent to the PoC server 200, the right to speak is first abandoned, and then the additional data is transmitted to the PoC server 200 for a predetermined time or a predetermined period. Good. In this case, the PoC server 200 abandons the speaking right of the mobile terminal (user) that has sent the right to speak, and receives additional data while the right to speak is not received from another portable terminal 100. The received additional data is distributed to all members of the group participating in the conference other than the member who has renounced the right. You may make it stop reception of this additional data, when the floor-right request | requirement comes from the other portable terminal 100. FIG.

(3) At both the start of speaking and the abandonment of speaking (see Fig. 7 (C)):
Alternatively, the additional data may be distributed to other members of the group participating in the conference both after acquiring the floor and when abandoning the floor. This is configured by combining (1) and (2) above.

Next, data received by terminal C in FIGS. 4 and 5 will be described with reference to FIGS.
In FIG. 8, a description will be given assuming that the right to speak is abandoned after transmission of the additional data (mute / designated data) is completed.

When the terminal A receives the speech permission, the additional data is transmitted from the terminal A, and stops when the terminal A actually starts speaking. (After obtaining the floor, there may be slight blanking until data is sent or conversation is started.)
The terminal C receives and outputs the additional data sent from the terminal A and the subsequent data (speech by voice, videophone, etc.).

Next, the user of the terminal A turns off the PTT switch to give up the right to speak, and ends the data transmission. In this case, the terminal A sends additional data (mute / user-specific data) for a predetermined time, and then sends a request to abandon the right to speak.
The user of the terminal A has abandoned the right to speak when the PTT switch is turned off, but the abandonment of the right to speak on the PoC server occurs after transmission of additional data is automatically stopped, that is, with a delay. However, if additional data is not inserted at the end, the right to speak is also abandoned when the PTT switch of terminal A is turned off.

  In addition, since the additional data is distributed before the right to speak, the other speakers (B, C, D) have finished speaking of the previous speaker and no one has the right to speak. And can easily know the opportunity to make a floor request.

FIG. 9 will be described assuming that additional data (mute / user-specific data) is continuously transmitted before and after the message data.
When terminal A receives a speech permission, terminal A transmits additional data from terminal A followed by data (such as speech or a voice call), and terminal C receives and outputs the data.
Next, when the user of terminal A turns off the PTT switch and abandons the right to speak, he or she makes a request to abandon the right to speak and repeatedly transmits additional data (mute / user-specific data) for a predetermined time. .

  In the PoC server, the floor is abandoned and the additional data is distributed to the terminals of the group until the floor request is received, so the other terminals (B, C, D) have finished speaking of the previous speaker. It is possible to know that no one has the right to speak now, and it is possible to easily know the opportunity to make a request. Therefore, the terminal B requests the right to speak, and the additional data of the terminal A is stopped when the permission to speak is given or when the right to speak is requested.

According to the above configuration, inadvertent data (video / audio disturbance, unintended video / audio, etc.) is not reproduced at the transition of received data even when communication is performed by a plurality of terminals.
Also, if the user's unique data is transmitted until someone makes a floor request after abandoning the floor, it is possible to easily know when to make the floor request.

<Embodiment 2>
FIG. 10 is a block diagram showing a functional configuration of a communication system according to Embodiment 2 of the present invention. In the figure, the mobile terminal 100 includes a PTT switch state detection unit 110, a speaking right acquisition unit 120, a speaking unit 130, a receiving unit 140, an output unit 150, and a speaking right abandonment unit 180 in addition to the PoC client function. ing.
In addition, in FIG. 10, the PoC server 200 includes a floor management unit 210, a group management unit 220, a reception unit 230, a distribution unit 240, an additional data transmission unit 250, and an additional data storage unit 260 in addition to the functions of the PoC server. It is made up of.
10, the same functions as those in FIG. 6 are denoted by the same reference numerals, and the description thereof is only different.

In the first embodiment, the additional data is transmitted from the portable terminal of the speaker. However, in the second embodiment, the PoC server distributes the additional data to the portable terminal of the target group along with the transfer of the right to speak.
For this reason, the user of each mobile terminal registers unique additional data (logo, mark, video clip, animation, etc.) that can be identified by the group member in the additional data storage unit 260 prior to communication by PoC. Keep it.
Therefore, in the additional data storage unit 260, additional data such as voice, image, and video registered in advance by the system and additional data registered by the user are respectively added with an additional data identifier (additional data ID) and an additional data name. It is stored in association.
The additional data storage unit 260 stores a list of identifiers of additional data selected by the user in association with the user identifier (user ID), the user name, and the address of the user portable terminal.

  The floor control unit 210 activates the additional data transmission unit 250 at any of the following three timings to distribute the additional data to the members of the group participating in the conference.

(1) When the right to speak is requested:
The floor management unit 210 receives the floor request from the mobile terminal 100, refers to the group management unit 220, and sets the floor acquisition flag of any user belonging to the group ID added to the floor request. Find out if it is on. When there is a user whose speaking right acquisition flag is on, a speaking disapproval signal is returned to the requesting mobile terminal 100.
If no user has the floor acquisition flag turned on, a speech permission signal is returned to the requesting mobile terminal 100 and the additional data transmission unit 250 is activated. Of course, when the additional data is not transmitted at the time of requesting the right to speak, only the speech permission signal is returned.

  The additional data transmission unit 250 retrieves the additional data from the additional data storage unit 260 and refers to the group management unit 220 to obtain the addresses of all mobile terminals in the group to which the user belongs or the addresses of the mobile terminals of communication partners. The extracted additional data is distributed to all these addresses.

  The additional data can be extracted by the user who has sent the request for speaking right selected from the additional data storage unit 260 in advance, or may be fixedly determined by the system, or may be requested for the right to speak. The additional data selected by the user who sent the message may be selected at random. Further, both data prepared by the system and data designated by the user may be selected.

(2) When the right to speak is abandoned:
The speaking right management unit 210 first receives a speaking right abandonment request from the portable terminal 100, and in the case of one-to-one communication, turns off the speaking right acquisition flag of the communication partner of the group management unit 220, and performs group communication. In this case, the floor acquisition flag of any user belonging to the group ID added to the floor request is turned off. Thereafter, the additional data transmission unit 250 is activated.
The additional data transmission unit 250 retrieves the additional data from the additional data storage unit 260 and refers to the group management unit 220 to obtain the addresses of all mobile terminals in the group to which the user belongs or the addresses of the mobile terminals of communication partners. The additional data extracted for all of these addresses is distributed for a predetermined time or a predetermined period.

The additional data may be extracted by the user who has sent the request for abandonment of the right to pre-select from the additional data storage unit 260, or may be fixedly determined by the system, or The additional data selected by the user who sent the abandonment request may be selected at random. Further, both data prepared by the system and data designated by the user may be selected.
Of course, when the additional data is not transmitted at the time when the floor is abandoned, the additional data transmitter 250 is not activated and only the floor is abandoned.

  In addition, as described above, the additional data is not distributed for a predetermined time period or a predetermined period, and as long as a speaking right request is not received from the mobile terminal 100, it is sent to all members of the group participating in the conference. The additional data may be distributed, and the distribution of the additional data may be stopped when the right to speak is received from the mobile terminal 100.

(3) At both the start of speaking and the abandonment of speaking rights:
Alternatively, the additional data may be distributed to all members of the group participating in the conference both at the time of requesting the right to speak and at the time of requesting abandonment of the right to speak. This is configured by combining (1) and (2) above.

If Embodiment 2 is configured as described above, it is possible to easily know when to make a floor request in PoC communication.
Even if communication is performed by a plurality of portable terminals, inadvertent data (video / audio disturbance, unintended video / audio, etc.) is not reproduced at the transition of received data.

1 is a diagram showing a system configuration of a communication system according to the present invention. It is a figure explaining the structure of the portable terminal used with the communication system which concerns on this invention. It is a figure explaining the PTT switch of a portable terminal. It is a figure explaining group communication performed by PoC. It is a figure explaining the timing of data transmission after utterance acquisition and utterance abandonment in PoC communication. It is a block diagram which shows the function structure of the communication system which concerns on Embodiment 1 of this invention. It is a figure explaining the additional data transmitted at the time of PoC communication. It is a figure explaining the data delivered at the time of PoC communication. It is another figure explaining the data delivered at the time of PoC communication. It is a block diagram which shows the function structure of the communication system which concerns on Embodiment 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Antenna, 2 ... Radio | wireless part, 3 ... Communication control part, 4 ... Operation part, 5 ... Memory | storage part, 6 ... PTT switch, 7 ... Image | video processing part, 8 ... Display part, 9 ... Audio | voice processing part, 10 ... Microphone , 11 ... Speaker, 12 ... Main control unit, 100 ... Portable terminal, 110 ... PTT switch state detection unit, 120 ... Speaking right acquisition unit, 130 ... Speaking unit, 140 ... Reception unit, 150 ... Output unit, 160 ... Additional data Transmission unit, 170 ... additional data storage unit, 180 ... speaking right abandonment unit, 200 ... PoC server, 210 ... speaking right management unit, 220 ... group management unit, 230 ... reception unit, 240 ... distribution unit, 250 ... additional data transmission , 260... Additional data storage unit, 300... Base station, 400.

Claims (18)

  In a communication system that performs communication by PoC (Push-to-Talk over Cellular) by connecting a plurality of mobile terminals and servers, a user who has acquired the right to speak when the right to speak is changed or A communication system that distributes data enabling identification of a user who has abandoned the right to speak.   In a communication system in which a plurality of portable terminals and a server are connected to perform communication using PoC, when the voice of the portable terminal is changed, data that does not adversely affect the data that is initially spoken is distributed. A communication system characterized by the above.   3. The communication system according to claim 1, wherein when the mobile terminal obtains the right to speak, the first speech data is transmitted after the mute data is transmitted.   4. The communication system according to claim 1, 2, or 3, wherein mute data is transmitted when the portable terminal abandons the right to speak.   3. The communication system according to claim 1 or 2, wherein when the mobile terminal obtains the right to speak, the first speech data is transmitted after data unique to the user of the mobile terminal is transmitted. A featured communication system.   6. The communication system according to claim 3, wherein after the right to speak is acquired, transmission of mute data or user-specific data is started and stopped when actual speech is started. system.   6. The communication system according to claim 1, wherein when the mobile terminal abandons the right to speak, unique data is transmitted to a user of the mobile terminal.   The communication system according to claim 5 or 7, wherein a plurality of the user-specific data are included, and the plurality of user-specific data are sequentially or randomly transmitted from the plurality of user-specific data.   The communication system according to any one of claims 1 to 8, wherein when the mobile terminal acquires the right to speak or when the right to speak is abandoned, the mute data and the user-specific data are transmitted together. A communication system characterized by that.   10. The communication system according to any one of claims 4 to 9, wherein the right to speak is abandoned, and is stopped after transmission of a predetermined reproduction time or a predetermined number of reproductions, the mute data or user-specific data. Communication system.   10. The communication system according to any one of claims 4 to 9, wherein the right to speak is abandoned after transmitting a predetermined reproduction time or a predetermined number of reproduction times, the mute data or user-specific data. system.   10. The communication system according to any one of claims 4 to 9, wherein the right to speak is abandoned, the mute data or user-specific data is repeatedly transmitted continuously, and is stopped when a right to speak is requested. Communications system.   The communication system according to any one of claims 1 to 12, wherein the mute data and the user-specific data are transmitted from the portable terminal.   13. The communication system according to claim 1, wherein the mute data and the user-specific data are transmitted from the server.   5. The communication system according to claim 2, 3 or 4, wherein specific data indicating the data that does not have an adverse effect is distributed and output so that the mobile terminal that has received the specific data does not have an adverse effect. A communication system characterized by that.   A PTT switch state detection unit for detecting whether or not a PTT switch for using PTT (Push-to-Talk) technology and service is pressed in a portable terminal connected to a server and performing communication by PoC; When the PTT switch state detection unit detects that the PTT switch has been pressed, sends a request to obtain a right to speak to the server, and receives a speech permission from the server, the mute data or the user's uniqueness of the mobile terminal A mobile terminal comprising: a floor acquisition unit that transmits data.   In a server that performs communication by PoC by connecting a plurality of mobile terminals, when receiving a request to speak from the mobile terminal and returning whether or not to speak, permission is given and mute data or speech is permitted. A server comprising a floor control unit that distributes data unique to a user of a mobile terminal to the plurality of mobile terminals.   In a communication method in which a plurality of portable terminals and a server are connected to perform communication using PoC, when the speaking right of the portable terminal is changed, the mute data or the user who has acquired the speaking right or the speaking right is abandoned. A communication method characterized by distributing data that enables a user to be identified.

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