JP2007306467A - Mobile station, mobile communication system, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile station, a mobile communication system and a program suited to implement group communication automatically finished when such conditions keep up for a predetermined time that all mobile stations do not acquire right of speaking, as typified by PTT communication, which can follow a line for a long time without interruption and without imposing a burden on a user. <P>SOLUTION: A control unit of the mobile station clocks the duration time of the conditions, where all mobile stations constituting group communication are estimated not to acquire right of speaking in the course of the group communication which is automatically interrupted, when the conditions that the all mobile stations do not acquire right of speaking keep up for a predetermined time. When a difference is 0 between threshold duration time and the duration time of the conditions that all the mobile stations constituting the group communication are estimated not to acquire right of speaking, the mobile station is made to transmit a requirement of acquisition of right of speaking to a server. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a mobile station, a mobile communication system, and a program used in group communication such as PTT (Push To Talk) communication.

  As mobile stations in recent CDMA systems, those capable of PTT communication have become widespread. The PTT communication is a group communication composed of a plurality of mobile stations having a PTT button and assigned IP addresses from an IP network, and a PTT server.

  During this PTT communication, the mobile station needs to acquire the right to speak in order to transmit voice to other mobile stations that make up the PTT communication. Here, the transmission of the right to acquire a request to the PTT server, which is necessary for acquiring the right to speak, is performed in response to pressing of the PTT button of the mobile station. Then, the PTT server that has received the right to speak from the mobile station gives the right to speak when the other mobile station has not obtained the right to speak.

  Then, the mobile station that has acquired the right to speak transmits the voice input from the microphone or the like to the other mobile stations constituting the PTT communication via the PTT server while the PTT button is continuously pressed. Send through. When the PTT button is released, the mobile station transmits a request to release a floor to the PTT server.

  Many inventions related to the PTT communication have been made, and examples thereof can be seen in Patent Documents 1 to 4.

  The invention described in Patent Document 1 is a PoC server having recording means for recording communication contents exchanged during each session together with information such as a caller identifier during PoC (Push to talk over Cellular) group communication. Alternatively, the present invention relates to a PoC system provided with a PoC client. According to this, the contents of communication exchanged during each session can be referred later, and the information such as the caller identifier is recorded together, so that the search is facilitated. Further, it is possible to adopt a configuration in which communication contents are recorded only when necessary, or a structure capable of recording even during a call including off-record contents.

  The invention described in Patent Document 2 relates to a mobile station including a slot cycle switching unit that switches a monitoring period of a paging channel slot to a predetermined period shorter than a period at the time of acceptance when a PTT setting operation is accepted by a base station. It is. According to this, during the PTT mode, a delay in transmission of messages such as notification of PTT arrival and channel assignment exchanged on the paging channel is shortened, and as a result, a delay in transmission of voice packets is suppressed.

  In the invention described in Patent Document 3, the PTT server gives a master authority to a specific PTT client, the PTT client having the master authority can select a floor management system, and the PTT server is based on the selected floor management system. The present invention relates to a speech right management method for a PTT service system for managing a speech right. According to this, the right to speak can be managed flexibly, and for example, the monopoly of the right to speak by one PTT client or the exclusion from the session of the person who performs the nuisance can be easily performed.

The invention described in Patent Document 4 relates to a method for dynamic group address creation that dynamically selects a member of PoC group communication based on presence information of a mobile station and / or location information of a mobile station. is there. This facilitates dynamic group creation for a PoC group communication session. For example, a PoC group communication session by people having a common hobby can be easily realized.
JP 2005-234666 A JP 2005-057394 A JP 2006-042357 A JP 2005-312045 A

  By the way, in the PTT communication using the techniques described in Patent Documents 1 to 4, when a state in which all mobile stations constituting the PTT communication have not acquired the right to speak continues for a predetermined time, the PTT server performs packet connection. The PTT communication is automatically terminated. Once PTT communication is completed, in order to perform PTT communication with the same member once again, one of the users performs operations such as calling (inviting) to other users, It is necessary to perform an operation. In the present specification, the user means a person who operates the mobile station.

  Therefore, when it is desired to perform PTT communication without interruption for a long time, it is necessary to monitor a state in which all mobile stations constituting the PTT communication have not acquired the right to speak, which increases the burden on the user. Therefore, it has been difficult to effectively use a service capable of performing PTT communication for a fixed amount regardless of the time and the number of times.

  In view of the above problems, in the present invention, a group communication represented by PTT communication, which is automatically terminated when a state in which all mobile stations have not acquired the right to speak continues for a predetermined time, It is an object of the present invention to provide a mobile station, a mobile communication system, and a program suitable for performing without interruption of time and without burdening the user.

  In the present invention, the mobile station is composed of a plurality of mobile stations and a server, and the voice from the mobile station given the right to speak by the server is transmitted to other mobile stations. Mobile stations that can automatically participate in group communication that is automatically terminated when a state that has not been acquired continues for a predetermined time, and during the group communication, all mobile stations that constitute the group communication A control unit that detects a state that is estimated to have not acquired the voice and measures the duration of the state in which it is estimated that all mobile stations that constitute the group communication have not acquired the right to speak Features.

  In the present invention, the mobile station configured as described above further comprises a speaking right input unit for inputting a speaking right acquisition request and a speaking right release request transmission command to the server, and the control unit performs the group communication during the group communication, The input of the floor-to-bottom input unit is detected, and after the start of the group communication or after the latest floor-to-bottom release request transmission command is input by the floor-to-bottom input unit, The state in which the transmission command is not input may be a state in which it is estimated that all mobile stations constituting the group communication have not acquired the right to speak.

  In the present invention, the mobile station configured as described above further comprises a speaking right input unit for inputting a speaking right acquisition request and a speaking right release request transmission command to the server, and the control unit performs the group communication during the group communication, The right to speak is detected after the input of the right-to-speak input unit and the presence / absence of voice reception and after the start of the group communication or after the latest right-to-speak release request transmission command is input by the right-to-speak input unit. A state in which a command to acquire a right to speak is not input by the input unit and no voice is received, and a state in which all mobile stations constituting the group communication are estimated not to have a right to speak It is desirable to do.

  In the present invention, in the mobile station configured as described above, it is preferable that the control unit calculates a difference between a threshold duration and the duration.

  In the present invention, in the mobile station having the above configuration, when the difference between the threshold duration and the duration is equal to or less than a predetermined time, the control unit may cause the user to recognize the difference. .

  In the present invention, in the mobile station configured as described above, when the difference between the threshold duration and the duration is zero, the control unit transmits a request to acquire a right to speak to the server. It is desirable to

  In the present invention, in the mobile station configured as described above, when the difference between the threshold duration and the duration is 0, the control unit transmits a request to acquire a right to speak to the server. In addition, after acquiring the right to speak, predetermined voice may be transmitted to other mobile stations constituting the group communication.

  In the present invention, it is preferable that the mobile station having the above-described configuration includes a threshold duration input unit for inputting the threshold duration.

  In the present invention, it is preferable that the mobile station having the above-described configuration includes a display unit that displays a difference between the threshold duration and the duration.

  In the present invention, in the mobile station configured as described above, the group communication may be PTT (Push To Talk) communication.

  In the present invention, the mobile communication system has a plurality of mobile stations and a server, and the voice from the mobile station to which the right to speak is given by the server is transmitted to other mobile stations. A mobile communication system that performs group communication that is automatically terminated when a station has not acquired the right to speak for a predetermined period of time, wherein at least one of the plurality of mobile stations is configured as described above It is a mobile station.

  In the present invention, the program is composed of a plurality of mobile stations and a server, the voice from the mobile station given the right to speak by the server is transmitted to other mobile stations, and all the mobile stations have the right to speak. A program that allows a mobile station that can participate in group communication that automatically ends when a state that has not been acquired continues for a predetermined time to perform communication processing, wherein the communication processing is performed during the group communication, Detecting a state in which it is estimated that all mobile stations constituting the group communication have not obtained the right to speak, and estimating that all mobile stations constituting the group communication have not obtained the right to speak. Measuring the duration of the state.

  The control unit of the mobile station of the present invention detects, during group communication, a state in which it is estimated that all mobile stations constituting the group communication have not acquired the right to speak, and all mobile stations constituting the group communication. Measures the duration of the estimated state that has not acquired the floor. Accordingly, in group communication represented by PTT communication, which is automatically terminated when a state in which all mobile stations have not acquired the right to speak continues for a predetermined time, group communication useful for preventing automatic termination of group communication. Thus, it is possible to use the duration time information in a state where it is estimated that all mobile stations constituting the mobile station have not acquired the right to speak.

  In addition, the control unit of the mobile station according to the present invention calculates the difference between the threshold duration and the duration of the state in which it is estimated that all mobile stations constituting the group communication have not acquired the floor. Therefore, the threshold duration can be compared with the duration in which it is estimated that all mobile stations constituting the group communication have not acquired the right to speak, and various judgments are made using this comparison information. be able to. For example, if the threshold duration is the duration in which all mobile stations have not acquired the floor until the group communication is automatically terminated, the threshold duration; and all of the group communications The comparison information between the state in which it is estimated that the mobile station has not acquired the right to speak is useful for preventing automatic termination of group communication.

  According to the present invention, group communication, which is automatically terminated when a state in which all mobile stations have not acquired the right to speak, such as PTT communication, continues for a predetermined period of time, without interruption for a long time. Provided are a mobile station, a mobile communication system, and a program that are suitable for performing without burden.

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

(Configuration of mobile station 1)
FIG. 1 is a block diagram showing a schematic configuration of a mobile station 1 according to the embodiment of the present invention. The mobile station 1 includes an antenna 10, a radio unit 20, an audio processing unit 30, a speaker 40, a microphone 50, a PTT button 60 (speaking right input unit), a display 70 (display unit), and a key operation unit. 80 (threshold duration input unit) and a control unit 90. The control unit 90 includes a floor right control unit 91, a SIP (Session Initiation Protocol) control unit 92, and a timer unit 93.

  The flow of processing when performing voice reception using the mobile station 1 is as follows. First, a received signal received by the antenna 10 is sent to a radio unit 20 including a high frequency circuit, a modem circuit, and a signal processing circuit, and various processes are performed by the radio unit 20. Then, the signal that has been subjected to various types of processing by the radio unit 20 is sent to the audio processing unit 30 and converted into an analog signal by the audio processing unit 30. Then, the signal converted into the analog signal by the audio processing unit 30 is sent to the speaker 40 and output by the speaker 40.

  The flow of processing when transmitting voice using the mobile station 1 is as follows. First, the audio signal input to the microphone 50 is sent to the audio processing unit 30 and converted into a digital signal by the audio processing unit 30. The signal converted into a digital signal by the audio processing unit 30 is sent to the radio unit 20 including a high frequency circuit, a modulation / demodulation circuit, and a signal processing circuit, and various processes are performed by the radio unit 20. The signal that has been subjected to various processes by the radio unit 20 is sent to the antenna 10 and transmitted from the antenna 10.

  The PTT button 60 is a button that is pressed by a user of the mobile station 1 who desires to acquire a right to speak or transmit a voice during PTT communication. Details of the PTT button 60 will be described later.

  The display 70 is a display unit that displays various videos in accordance with operation commands from the control unit 90. That is, the display 70 displays various videos corresponding to the functions of the mobile station 1, such as an incoming call history, an address book, a schedule book, and a clock.

  The key operation unit 80 has various input keys pressed by the user such as a numeric key used for inputting the telephone number of the other party who wants to make a call and an end key used for terminating the PTT communication. Then, an electrical signal corresponding to the pressing of the input key by the user is transmitted to the control unit 90.

  The control unit 90 is connected to the radio unit 20, the audio processing unit 30, the PTT button 60, the display 70, and the key operation unit 80, and outputs various control operations by outputting control instruction signals thereto. Is running. The control unit 90 includes a floor right control unit 91, a SIP control unit 92, and a timer unit 93. Details of the floor right control unit 91, the SIP control unit 92, and the timer unit 93 will be described later.

(PTT communication flow)
Next, the flow of PTT communication will be described. FIG. 2 is a sequence diagram showing the flow of PTT communication. The user of the mobile station 1 requests another mobile station to participate in the PTT communication and uses the key operation unit 80 to start the PTT communication. And the PTT communication start operation is performed. Then, an electric signal from the key operation unit 80 according to the input operation of another mobile station and the start operation of PTT communication is transmitted to the control unit 90.

  Then, the SIP control unit 92 causes the radio unit 20 and the antenna 10 to transmit an INVITE signal to the PTT server (S201). Here, the INVITE signal is a SIP message for requesting another mobile station to participate in PTT communication and starting PTT communication.

  The PTT server that has received the INVITE signal transmits a 100 Trying signal and a 180 Ringing signal to the mobile station 1 (S202, S203). Here, the 100 Trying signal is a SIP message indicating that the INVITE signal from the mobile station 1 is received and being processed, and the 180 Ringing signal is calling another mobile station. Is a SIP message.

  When another mobile station responds, the PTT server transmits a 200 OK signal to the mobile station 1 (S204). When the mobile station 1 receives the 200 OK signal, the SIP control unit 92 causes the radio unit 20 and the antenna 10 to transmit an ACK signal to the PTT server (S205), and PTT communication is started. Here, the 200 OK signal is a SIP message indicating that another mobile station has responded, and the ACK signal is a SIP message indicating confirmation of the 200 OK signal from the PTT server.

  Next, a flow when transmitting voice from the mobile station 1 to another mobile station during PTT communication will be described. The user of the mobile station 1 presses the PTT button 60 when he / she wants to transmit voice to another mobile station (S206). Then, an electrical signal from the PTT button 60 due to the pressing of the PTT button 60 is transmitted to the control unit 90.

  Then, the floor right control unit 91 causes the radio unit 20 and the antenna 10 to transmit an RTCP (Floor Request) signal to the PTT server (S207). Here, the RTCP (Floor Request) signal is an RTCP (Real-time Transport Protocol Control Protocol) message for requesting acquisition of the right to speak by the mobile station 1.

  If no other mobile station has acquired the right to speak at that time, the PTT server transmits an RTCP (Floor Taken) signal to the mobile station 1 (S208), whereby the mobile station 1 speaks. Win the right. Here, the RTCP (Floor Taken) signal is an RTCP message that conveys that the mobile station 1 has acquired the right to speak. While the PTT button 60 continues to be pressed, when the user inputs voice to the microphone 50, the voice is transmitted to another mobile station via the PTT server (S209).

  When the PTT button 60 is released (S210), the floor right control unit 91 causes the radio unit 20 and the antenna 10 to transmit an RTCP (Floor Release) signal to the PTT server (S211). Here, the RTCP (Floor Release) signal is an RTCP message for a request to release the floor of the mobile station 1.

  The PTT server that has received the RTCP (Floor Release) signal transmits an RTCP (Floor IDLE) signal to the mobile station 1 (S212). Here, the RTCP (Floor IDLE) signal is an RTCP message indicating that the mobile station 1 has released the floor.

  Then, in a state where all the mobile stations constituting the PTT communication have not acquired the right to speak, the PTT server activates the wireless monitoring timer (S213). Then, if a state in which all mobile stations constituting the PTT communication have not obtained the right to speak continues for a predetermined time (S214), the PTT server transmits a BYE signal to the mobile station 1 ( S215). When the mobile station 1 receives the BYE signal, the SIP control unit 92 causes the radio unit 20 and the antenna 10 to transmit a 200 OK signal to the PTT server (S216), and the PTT communication is terminated. Here, the BYE signal is a SIP message indicating the end of PTT communication, and the 200 OK signal is a SIP message meaning confirmation of the BYE signal from the PTT server.

  As described above with reference to FIG. 2, in the PTT communication, when all mobile stations constituting the PTT communication have not acquired the right to speak, the PTT server releases the packet connection. Then, the PTT communication is automatically terminated. Then, once PTT communication is completed, in order to perform PTT communication with the same member once again, one of the users performs operations such as calling (inviting) to other mobile stations, and other users respond, etc. It is necessary to perform the operation.

  Therefore, when it is desired to perform PTT communication without interruption for a long time, it is necessary to monitor a state in which all mobile stations constituting the PTT communication have not acquired the right to speak, which increases the burden on the user. Therefore, it has been difficult to effectively use a service capable of performing PTT communication for a fixed amount regardless of the time and the number of times. Therefore, a first embodiment and a second embodiment of the mobile station 1 of the present invention that solve this problem will be described below.

(First embodiment)
Below, 1st Embodiment of the mobile station 1 of this invention is described. First, the timer unit 93 of the mobile station 1 according to this embodiment will be described. The timer unit 93 is a timer that counts down starting from the threshold duration time input by the user through the key operation unit 80. In other words, the timer unit 93 has a configuration in which, when counting is started, the counter decreases with the passage of time from the threshold duration input by the user through the key operation unit 80, and times out when the counter reaches zero. Here, the threshold duration can be arbitrarily determined by the user, but is slightly shorter than the duration in which all mobile stations have not acquired the floor until the PTT communication is automatically terminated. Is desirable. In addition, the control unit 90 causes the display 70 to display the countdown state (counter).

  Next, the control procedure of the control unit 90 of the mobile station 1 according to this embodiment will be described. FIG. 3 is a flowchart showing a control procedure of the control unit 90 of the mobile station 1 according to the present embodiment. In the present embodiment, when the PTT communication is started (S301), the control unit 90 starts counting of the timer unit 93 (S302). Next, the control unit 90 detects whether or not the timer unit 93 has timed out (S303). If the timer unit 93 has not timed out, the control unit 90 next detects whether or not the PTT button 60 has been pressed (S304).

  Here, if the PTT button 60 is not pressed, the control unit 90 next detects whether or not the end-call key is pressed (S305). If the end key is not pressed here, the process returns to S303.

  On the other hand, if the timer unit 93 has timed out in S303, or if the PTT button 60 is pressed in S304, the Floor right control unit 91 next sends the PTT to the radio unit 20 and the antenna 10. An RTCP (Floor Request) signal is transmitted to the server (S306). Then, the control unit 90 monitors the release of the PTT button 60 (S307).

  Here, when the PTT button 60 is released, the floor right control unit 91 next causes the radio unit 20 and the antenna 10 to transmit an RTCP (Floor Release) signal to the PTT server (S308). . Then, the control unit 90 resets the counter of the timer unit 93 (returns the counter to the threshold duration) (S309), starts counting (S310), and returns to S303.

  If the end key is pressed in S305, the control unit 90 next performs the end process (S311) and ends the PTT communication (S312).

  In the mobile station 1 configured as described above, the control unit 90 detects the release of the PTT button 60 during PTT communication, and the difference between the threshold duration and the duration of the state in which the PTT button 60 is released is 0. When this happens, an RTCP (Floor Request) signal is sent to the PTT server.

  Here, the PTT button 60 is released after the PTT communication is started, or after the latest speaking right release request transmission command is input by the PTT button 60 (after the release operation of the PTT button 60 is performed). ), A state in which a command to transmit the right to speak is not input by the PTT button 60 (a state in which the PTT button 60 is not pressed), and it is estimated that the mobile station 1 has not acquired the right to speak. State. Therefore, assuming that all other mobile stations have not acquired the right to speak, the state in which the PTT button 60 is released is presumed that all mobile stations constituting the PTT communication have not acquired the right to speak. It will be in a state to be.

  Therefore, for example, if the threshold duration is set to be slightly shorter than the duration in which all mobile stations have not acquired the floor until the PTT communication is automatically terminated, the control unit 90 determines that the PTT The duration of the state in which it is estimated that all mobile stations constituting the communication have not acquired the right to speak is not acquired by all the mobile stations until the PTT communication is automatically terminated. Since an RTCP (Floor Request) signal is transmitted to the PTT server immediately before the state duration time is reached, automatic termination of PTT communication can be prevented without imposing a burden on the user.

  In addition, the mobile station 1 having the above configuration includes a key operation unit 80 for inputting a threshold duration time. Therefore, even if the duration of the state in which all mobile stations have not acquired the right to speak until the PTT communication is automatically terminated is set by the mobile phone carrier or the like, The user can freely determine the threshold duration.

  In the mobile station 1 configured as described above, the control unit 90 displays on the display 70 a countdown state (counter) that is the difference between the threshold duration and the duration of the state in which the PTT button 60 is released. Let Thus, for example, if the threshold duration is set to be slightly shorter than the duration in which all mobile stations have not acquired the floor until the PTT communication is automatically terminated, the PTT communication is automatically performed. The user can visually recognize the estimated time until immediately before the termination, which is useful for preventing the automatic termination of the PTT communication.

  Further, the control unit 90 causes an RTCP (Floor Request) signal to be transmitted to the PTT server when the difference between the threshold duration and the duration in which the PTT button 60 is released becomes zero. (S306 in FIG. 3) After receiving an RTCP (Floor Taken) signal from the PTT server (not shown), before sending an RTCP (Floor Release) signal to the PTT server (S308 in FIG. 3), The audio data stored in a memory (not shown) in the control unit 90 may be transmitted to another mobile station (via a PTT server).

  According to this, not only can the automatic termination of the PTT communication be prevented without imposing a burden on the user, but also stored in a memory (not shown) in the control unit 90 in another mobile station constituting the PTT communication. It is possible to prompt a call by transmitting the voice data.

  Further, the control unit 90 may allow the user to recognize when the difference between the threshold duration and the duration of the state in which the PTT button 60 is released is equal to or less than a predetermined time. Specifically, the control unit 90 controls the audio processing unit 30 and the speaker 40 when the difference between the threshold duration and the duration of the state where the PTT button 60 is released is equal to or less than a predetermined time. For example, it may be possible to output audio data stored in a memory (not shown) in the unit 90.

  Further, as another means for allowing the user to recognize that the difference between the threshold duration and the duration of the state where the PTT button 60 is released is equal to or less than a predetermined time, the control unit 90 includes the threshold duration; When the difference between the duration of the state where the PTT button 60 is released and a predetermined time or less, the video on the display 70 blinks, a warning is displayed on the display 70, or the mobile station 1 is vibrated. It is also possible to do things.

  According to this, for example, if the threshold duration is set to a time slightly shorter than the duration in which all mobile stations have not acquired the floor until the PTT communication is automatically terminated, the PTT communication is configured. The duration of the state in which it is estimated that all mobile stations that have not acquired the right to speak continues the state in which all mobile stations have not acquired the right to speak until the PTT communication is automatically terminated The user can recognize that the time is approaching.

(Second Embodiment)
Below, 2nd Embodiment of the mobile station 1 of this invention is described. Note that the timer unit 93 of the mobile station 1 according to the present embodiment is the same as that of the first embodiment, and a description thereof will be omitted. First, the control procedure of the control unit 90 of the mobile station 1 according to this embodiment will be described. FIG. 4 is a flowchart showing a control procedure of the control unit 90 of the mobile station 1 according to the present embodiment. In the present embodiment, when the PTT communication is started (S401), the control unit 90 starts counting of the timer unit 93 (S402). Next, the control unit 90 detects whether or not the timer unit 93 has timed out (S403). If the timer unit 93 has not timed out, the control unit 90 next detects whether or not the PTT button 60 has been pressed (S404).

  Here, if the PTT button 60 is not pressed, the control unit 90 next detects whether or not the end-call key is pressed (S405). Here, if the end-call key is not pressed, the control unit 90 next monitors the presence or absence of voice reception (S406). If no voice is received, the process returns to S403.

  On the other hand, if the timer unit 93 has timed out in S403, or if the PTT button 60 is pressed in S404, the Floor right control unit 91 next sends the PTT to the radio unit 20 and the antenna 10. An RTCP (Floor Request) signal is transmitted to the server (S407). Next, the control unit 90 monitors the release of the PTT button 60 (S408).

  When the PTT button 60 is released, the floor right control unit 91 next causes the radio unit 20 and the antenna 10 to transmit an RTCP (Floor Release) signal to the PTT server (S409). . Then, the control unit 90 resets the counter of the timer unit 93 (returns the counter to the threshold duration) (S410), starts counting (S411), and returns to S403.

  If the end key is pressed in S405, the control unit 90 next performs an end process (S412) and ends the PTT communication (S413).

  If a voice is received in S406, the control unit 90 then resets the counter of the timer unit 93 (returns the counter to the threshold duration) (S410) and starts counting (S411). , The process returns to S403.

  In the mobile station 1 configured as described above, the control unit 90 detects the release of the PTT button 60 and the presence / absence of voice reception during PTT communication, and the threshold duration; the PTT button 60 is released, and voice reception is performed. When the difference between the continuation time and the period in which there is no is zero, an RTCP (Floor Request) signal is transmitted to the PTT server.

  Here, the PTT button 60 is released after the PTT communication is started, or after the latest speaking right release request transmission command is input by the PTT button 60 (after the release operation of the PTT button 60 is performed). ), A state in which a command to transmit the right to speak is not input by the PTT button 60 (a state in which the PTT button 60 is not pressed), and it is estimated that the mobile station 1 has not acquired the right to speak. State. The state where there is no voice reception is a state where it is estimated that all other mobile stations have not acquired the right to speak. Therefore, the state where the PTT button 60 is released and there is no voice reception is a state where it is estimated that all mobile stations constituting the PTT communication have not acquired the right to speak.

  Therefore, for example, if the threshold duration is set to be slightly shorter than the duration in which all mobile stations have not acquired the floor until the PTT communication is automatically terminated, the control unit 90 determines that the PTT The duration of the state in which it is estimated that all mobile stations constituting the communication have not acquired the right to speak is not acquired by all the mobile stations until the PTT communication is automatically terminated. Since an RTCP (Floor Request) signal is transmitted to the PTT server immediately before the state duration time is reached, automatic termination of PTT communication can be prevented without imposing a burden on the user.

  In addition, the mobile station 1 having the above configuration includes a key operation unit 80 for inputting a threshold duration time. Therefore, even if the duration of the state in which all mobile stations have not acquired the right to speak until the PTT communication is automatically terminated is set by the mobile phone carrier or the like, The user can freely determine the threshold duration.

  In the mobile station 1 configured as described above, the control unit 90 counts down (counter), which is the difference between the threshold duration and the duration when the PTT button 60 is released and there is no voice reception. Is displayed on the display 70. Thus, for example, if the threshold duration is set to be slightly shorter than the duration in which all mobile stations have not acquired the floor until the PTT communication is automatically terminated, the PTT communication is automatically performed. The user can visually recognize the estimated time until immediately before the termination, which is useful for preventing the automatic termination of the PTT communication.

  Further, the control unit 90 determines that the RTCP (Floor Request) signal to the PTT server when the difference between the threshold duration and the duration in which the PTT button 60 is released and there is no voice reception is zero. Is transmitted (S407 in FIG. 4), and after receiving an RTCP (Floor Taken) signal from the PTT server (not shown), an RTCP (Floor Release) signal is transmitted to the PTT server (FIG. 4). Before S409), the voice data stored in the memory (not shown) in the control unit 90 may be transmitted to another mobile station (via the PTT server).

  According to this, not only can the automatic termination of the PTT communication be prevented without imposing a burden on the user, but also stored in a memory (not shown) in the control unit 90 in another mobile station constituting the PTT communication. It is possible to prompt a call by transmitting the voice data.

  In addition, the control unit 90 causes the user to recognize when the difference between the threshold duration and the duration of the state in which the PTT button 60 is released and there is no voice reception is equal to or less than a predetermined time. Also good. Specifically, when the difference between the threshold duration and the duration when the PTT button 60 is released and there is no voice reception becomes equal to or less than a predetermined time, the control unit 90 It is conceivable to cause the speaker 40 to output audio data stored in a memory (not shown) in the control unit 90.

  As another means for allowing the user to recognize that the difference between the threshold duration and the duration in which the PTT button 60 is released and there is no voice reception is equal to or less than a predetermined time, the control unit 90 includes: When the difference between the threshold duration and the duration in which the PTT button 60 is released and there is no voice reception is less than or equal to a predetermined time, the video on the display 70 blinks or a warning is displayed on the display 70. It may be possible to perform the operation or vibrate the mobile station 1.

  According to this, for example, if the threshold duration is set to a time slightly shorter than the duration in which all mobile stations have not acquired the floor until the PTT communication is automatically terminated, the PTT communication is configured. The duration of the state in which it is estimated that all mobile stations that have not acquired the right to speak continues the state in which all mobile stations have not acquired the right to speak until the PTT communication is automatically terminated The user can recognize that the time is approaching.

  In the first embodiment and the second embodiment described above, the floor right control unit 91 of the mobile station 1 transmits an RTCP (Floor Request) signal to the PTT server (FIG. 3). S306 of FIG. 4, S407 of FIG. 4), a situation in which another mobile station has acquired the right to speak is not assumed. However, another mobile station has acquired the right to speak, and after transmitting an RTCP (Floor Request) signal from the mobile station 1 to the PTT server, the RTCP (Floor Taken) from the PTT server to the mobile station 1 is transmitted. A configuration in consideration of a case where signal transmission is not performed is also possible.

  FIG. 5 is a flowchart illustrating a control procedure of the control unit 90 of the mobile station 1 according to the first embodiment, to which a step of confirming whether another mobile station has acquired the right to speak is added. In FIG. 5, the same reference numerals are given to the same parts as those in FIG.

  FIG. 5 differs from FIG. 3 in that in step S306, the floor right control unit 91 determines whether or not an RTCP (Floor Taken) signal has been received after transmitting a RTCP (Floor Request) signal to the PTT server. This is the point that step S501 for detection is provided.

  That is, the feature here is that, in S306, after the floor right control unit 91 transmits an RTCP (Floor Request) signal to the PTT server, in S501, whether or not an RTCP (Floor Taken) signal is received is determined. By detecting, it is detecting whether other mobile stations have acquired the right to speak. If another mobile station has not acquired the right to speak (Yes in S501), the right to speak is given to the mobile station 1, and the control unit 90 then releases the PTT button 60. Monitor (S307).

  On the other hand, if another mobile station has acquired the right to speak (No in S501), the right to speak is not given to the mobile station 1, and the other mobile station has acquired the right to speak. Therefore, the control unit 90 next resets the counter of the timer unit 93 (returns the counter to the threshold duration) (S309), starts counting (S310), and returns to S303.

  According to the mobile station 1 configured as described above, when the floor right control unit 91 transmits an RTCP (Floor Request) signal to the PTT server (S306), another mobile station has acquired the right to speak. It is possible to cope with the case, and the mobile station 1 becomes more practical.

  FIG. 6 is a flowchart illustrating a control procedure of the control unit 90 of the mobile station 1 according to the second embodiment, to which a step of confirming whether another mobile station has acquired the right to speak is added. In FIG. 6, the same parts as those in FIG.

  6 differs from FIG. 4 in that, in step S407, the floor right control unit 91 determines whether or not an RTCP (Floor Taken) signal has been received after transmitting a RTCP (Floor Request) signal to the PTT server. This is the point that step S601 for detection is provided.

  That is, the feature here is that, in S407, after the floor right control unit 91 transmits an RTCP (Floor Request) signal to the PTT server, in S601, whether or not an RTCP (Floor Taken) signal is received is determined. By detecting, it is detecting whether other mobile stations have acquired the right to speak. If another mobile station has not acquired the right to speak (Yes in S601), the right to speak is given to the mobile station 1, and the control unit 90 then releases the PTT button 60. Monitor (S408).

  On the other hand, if another mobile station has acquired the right to speak (No in S601), the right to speak is not given to the mobile station 1, and the other mobile station has acquired the right to speak. Therefore, the control unit 90 next resets the counter of the timer unit 93 (returns the counter to the threshold duration) (S410), starts counting (S411), and returns to S403.

  According to the mobile station 1 configured as described above, when the floor right control unit 91 transmits an RTCP (Floor Request) signal to the PTT server (S407), another mobile station has acquired the right to speak. It is possible to cope with the case, and the mobile station 1 becomes more practical.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, in the first embodiment, the state in which the PTT button 60 is released is assumed to be a state in which all mobile stations have not acquired the floor, and in the second embodiment, the PTT button 60 is released. A state in which the button 60 is released and no voice is received is assumed to be a state in which all mobile stations have not acquired the right to speak.

  However, when one of the mobile stations constituting the PTT communication acquires the right to speak, the fact that a traffic channel is set between all the mobile stations constituting the PTT communication and the PTT server is utilized. It is also conceivable that the state in which this traffic channel is not set is assumed to be a state in which it is estimated that all mobile stations have not acquired the right to speak.

  In the above embodiment, the group communication is PTT communication. However, the present invention automatically terminates when all mobile stations have not acquired the right to speak for a predetermined time. It is effective as a mobile station, a mobile communication system and a program used for various types of group communication.

  The present invention is effective as a mobile station, a mobile communication system, and a program used in group communication such as PTT communication.

The block diagram which shows the structure of the outline of the mobile station 1 which concerns on embodiment of this invention. The sequence diagram which shows the flow of PTT communication. The flowchart which shows the control procedure of the control part 90 of the mobile station 1 which concerns on 1st Embodiment. 6 is a flowchart showing a control procedure of the control unit 90 of the mobile station 1 according to the second embodiment. The flowchart which shows the control procedure of the control part 90 of the mobile station 1 which concerns on 1st Embodiment which added the step which confirms whether the other mobile station has acquired the floor. The flowchart which shows the control procedure of the control part 90 of the mobile station 1 which concerns on 2nd Embodiment which added the step which confirms whether the other mobile station has acquired the floor.

Explanation of symbols

1 Mobile station 60 PTT button (speaking right input part)
70 Display (display unit)
80 Key operation part (Threshold duration input part)
90 Control unit

Claims (12)

The mobile station is composed of a plurality of mobile stations and a server, and the voice from the mobile station given the right to speak by the server is transmitted to other mobile stations, and the state in which all the mobile stations have not obtained the right to speak is predetermined. It is a mobile station that can participate in group communication that automatically ends as time continues,
During the group communication,
Detecting a state where all mobile stations constituting the group communication are presumed not to have a right to speak,
A mobile station, comprising: a control unit that counts a duration of a state in which it is estimated that all mobile stations constituting the group communication have not acquired the floor. A speaking right input unit for inputting a command to acquire a right to speak and a request to release a right to speak to the server,
The controller is
During the group communication,
Detecting the input of the floor input unit,
After the start of group communication, or after the latest speaking right release request transmission command is input by the speaking right input unit, the state where the speaking right acquisition request transmission command is not input by the speaking right input unit,
2. The mobile station according to claim 1, wherein all mobile stations constituting the group communication are in a state in which it is estimated that the right to speak is not acquired. A speaking right input unit for inputting a command to acquire a right to speak and a request to release a right to speak to the server,
The controller is
During the group communication,
Detecting the input of the floor and the presence or absence of voice reception;
After the start of the group communication, or after the latest speaking right release request transmission command is input by the speaking right input unit, the speaking right acquisition request transmission command is not input by the speaking right input unit, and When there is no audio reception,
2. The mobile station according to claim 1, wherein all mobile stations constituting the group communication are in a state in which it is estimated that the right to speak is not acquired. The controller is
The mobile station according to any one of claims 1 to 3, wherein a difference between a threshold duration and the duration is calculated. The controller is
The mobile station according to claim 4, wherein when the difference between the threshold duration and the duration is equal to or less than a predetermined time, the user is made to recognize the difference. The controller is
The mobile station according to claim 4 or 5, wherein when the difference between the threshold duration time and the duration time becomes 0, a request to acquire a right to speak is transmitted to the server. The controller is
When the difference between the threshold duration time and the duration time becomes 0, a request for acquisition of the right to speak is transmitted to the server,
6. The mobile station according to claim 4 or 5, wherein a predetermined voice is transmitted to another mobile station constituting the group communication after the floor is acquired.   The mobile station according to any one of claims 4 to 7, further comprising a threshold duration input unit for inputting the threshold duration.   The mobile station according to claim 4, further comprising a display unit that displays a difference between the threshold duration and the duration.   The mobile station according to claim 1, wherein the group communication is PTT (Push To Talk) communication. A plurality of mobile stations and a server;
Group communication that is automatically terminated when a voice from a mobile station that has been given the right to speak by the server is transmitted to another mobile station and all mobile stations have not acquired the right to speak for a predetermined time A mobile communication system for performing
11. The mobile communication system according to claim 1, wherein at least one of the plurality of mobile stations is the mobile station according to claim 1. The mobile station is composed of a plurality of mobile stations and a server, and the voice from the mobile station given the right to speak by the server is transmitted to other mobile stations, and the state in which all the mobile stations have not obtained the right to speak is predetermined. A program that allows a mobile station that can participate in group communication that automatically ends as time continues to perform communication processing,
The communication process includes
During the group communication,
Detecting a state in which all mobile stations constituting the group communication are presumed not to have a floor.
Measuring the duration of a state in which it is estimated that all mobile stations constituting the group communication have not acquired the floor;
The program characterized by including.

Images