JP2007068226A - Communication program and communication terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain the available time in PoC (push to talk over cellular) service from a communication terminal side. <P>SOLUTION: A user terminal 21 sends a Floor request to a PoC server 22, if a call button is depressed by a user, when the user desires to talk (step S201). The PoC server 22 determines available time 23 to be allocated to the user terminal 21 and send a Floor granted notification to the user terminal 21, in response to the Floor request from the user terminal 21 (step S202). At this time, the PoC server 22 sends a data indicating the available time for the user terminal 21 with the Floor granted notification. The user terminal 21 receives the Floor granted notification to start a "call" (RTP: Talk burst voice data) and displays own available time on a display of the user terminal 21 (step S203). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a communication program and a communication terminal in a PoC (push to talk over cellular) service.

  The PoC (push to talk over cellular) service is a service that realizes a half-duplex call using packet communication between a plurality of communication terminals via a server. In the PoC service, the PoC server relays communication between a plurality of communication terminals. In a half-duplex call such as PoC, only a one-way call can be made. Therefore, each user acquires the right to speak before starting the call. In the PoC service, after the right to speak is obtained, the callable time differs for each user, and the value is determined and managed by the PoC server.

  FIG. 11 shows a schematic diagram of the PoC service. The user terminal A1101, user terminal B1104, and user terminal C1105 are connected via a call control (SIP; Session Initiation Protocol) or IMS (IP Multimedia Subsystem) Core 1102 that performs user registration and a PoC server 1103 that manages a floor (Floor). Communicate. In FIG. 11, a solid line represents voice and floor control (speaking right control), and a dotted line represents SIP (call control).

  Since the PoC service performs a half-duplex call, after the connection with the other party is established, the voice data can be transmitted only while the call button is pressed, and the voice data is transmitted while the call button is pressed. Cannot be received. Therefore, in order to have a conversation, it is necessary to press and release the call button with a short exchange with each other. In addition, in the PoC service, not only one-to-one exchange but also a group can be set and connected to a plurality of terminals simultaneously. In this case, the audio data from the terminal that is pressing the call button is transmitted to all the remaining terminals (see, for example, Non-Patent Document 1).

“PoC Release 1.0 [3]”, [online], p.19-21, [searched August 6, 2004], Internet <URL: http: // www. ericsson.com/mobilityworld/sub/open/technologies/ims_poc/docs/poc_relase_1_0_spec>

  In such a PoC service, conventionally, the available call time of the user terminals 1101, 1104, 1105 is managed by the PoC server 1103. When the available call time elapses during the user's call, the call is suddenly terminated from the PoC server 1103. For example, the call was automatically terminated after 2 to 3 seconds.

  The present invention has been made in view of the above-described conventional circumstances, and an object of the present invention is to provide a communication program and a communication terminal capable of grasping the callable time on the communication terminal side in the PoC service.

  A communication program of the present invention is a communication program for controlling relay of communication between a plurality of terminals in a PoC service that realizes half-duplex communication using packet communication between a plurality of terminals. Receiving means for receiving a request to acquire a right to speak, permitting means for permitting the request to acquire a right to speak, allocating means for allocating a callable time to a terminal that is permitted to request the right to speak, It is a communication program for functioning as a transmission means for transmitting data to be transmitted to a terminal that is permitted to obtain the right to speak.

  According to the above configuration, by transmitting data indicating the allocated callable time to the terminal, it becomes possible to grasp the callable time on the terminal side that has received the data indicating the callable time. Improved convenience.

  In the communication program of the present invention, the transmission means adds the data indicating the available call time to the floor acquisition notification indicating that the floor acquisition request is permitted and transmits the data. According to the above configuration, the transmitting means adds the data indicating the callable time to the floor acquisition notification indicating that the floor acquisition request has been permitted, and transmits the data, thereby transmitting the existing floor acquisition notification. By using the sequence, the available call time can be notified to the terminal.

  The communication program of the present invention is a communication program for controlling relay of communication between a plurality of terminals in a PoC service that realizes half-duplex communication using packet communication between a plurality of terminals. A communication program for functioning as first communication means for negotiating a connection with a terminal and second communication means for negotiating a callable time allocated to the terminal with the terminal It is.

  According to the above configuration, it is possible to grasp the callable time on the terminal side by negotiating the callable time allocated to the terminal with the terminal, so that the convenience of the PoC service is improved. . Further, by negotiating the callable time allocated to the terminal with the terminal, the callable time desired by the terminal can be requested from the server, so the convenience of the PoC service is improved.

  The communication terminal of the present invention is a communication terminal that performs half-duplex communication using packet communication with another terminal via a server equipped with the communication program of the present invention. Transmitting means for transmitting an acquisition request; receiving means for receiving data indicating the callable time assigned to the terminal from the server; and notifying means for notifying the user of the callable time indicated by the received data; Prepare. According to the above configuration, by notifying the user of the available call time indicated by the received data, the user can grasp the available call time, so the convenience of the PoC service is improved.

  The communication terminal of the present invention is a communication terminal that performs half-duplex communication using packet communication via another server and a server equipped with the communication program of the present invention, for establishing a connection with the server. First communication means for performing negotiation, second communication means for negotiating callable time allocated to the server and the terminal, notification means for notifying the user of callable time allocated by negotiation, Is provided.

  Further, the communication terminal of the present invention includes a time measuring unit that measures an elapsed time after the start of the call, and the notification unit notifies the user of the call available time by displaying the remaining call available time. . In addition, the communication terminal of the present invention includes a time measuring unit that measures an elapsed time after the start of the call, and the notification unit notifies the user of the call possible time by outputting the remaining call available time by voice. is there. In addition, the communication terminal of the present invention includes a time measuring unit that measures an elapsed time after the start of a call, and the notification unit notifies the user of the call available time by ringing or vibrating according to the remaining call available time. To do. Furthermore, the communication terminal of the present invention includes a time measuring unit that measures an elapsed time after the start of a call, and the notification unit causes the light emitting element to emit light according to the remaining call available time, thereby allowing the user to set the call available time. It is to inform.

  According to the present invention, since data indicating the allocated callable time is transmitted to the terminal, the terminal that has received the data indicating the callable time can grasp the callable time. Improved convenience.

  Hereinafter, a PoC service for realizing a half-duplex call using packet communication between a plurality of communication terminals via a PoC server will be described. Half-duplex calling is a communication method in which voice can be transmitted in only one direction at a certain moment in a two-way call.

(First embodiment)
FIG. 1 is an internal block diagram of a user terminal in a PoC service for explaining the first embodiment of the present invention. The user terminal shown in FIG. 1 includes an input unit 13 such as a push button, a display unit 14 such as a liquid crystal display, a timer 15, a microphone 11, a speaker 12, a floor control (speaking right control) unit 16, A call button 17, a SIP control unit 19, and a communication control unit 18 are provided.

  The timer 15 measures the elapsed time after the call starts. The microphone 11 is for performing voice input. The speaker 12 performs audio output. The floor control unit 16 manages the floor request and response. The speaking right control unit 16 includes a transmission unit 16a, a reception unit 16b, and a notification unit 16c. The transmission means 16a transmits a request for acquiring a right to speak to request a right to speak to the PoC server. The receiving unit 16b receives data indicating the callable time assigned to the terminal from the PoC server. The notification unit 16c notifies the user of the available call time indicated by the received data.

  The call button 17 is a button to be pressed when the user wants to speak. The communication control unit 18 controls packet communication with the network. The SIP control unit 19 performs a call start control and the like. The SIP control unit 19 includes a first communication unit 19a, a second communication unit 19b, and a notification unit 19c. The first communication unit 19a negotiates with the PoC server for establishing a connection. The second communication means 19b negotiates the callable time allocated to the PoC server and the user terminal. The notification means 19c notifies the user of the available call time allocated by the negotiation. Note that the call button 17 may be a dedicated button, may be shared with a camera shooting button, or may be shared with any button depending on settings.

  FIG. 2 shows an outline of a sequence in the case where the PoC server 22 notifies the user terminal 21 that has acquired the right to speak the available call time in the PoC service of this embodiment. First, the functions of the PoC server 22 will be described with reference to FIG. The Poc server 22 includes a receiving unit 22a, a permitting unit 22b, an assigning unit 22c, a transmitting unit 22d, a first communication unit 22e, and a second communication unit 22f. The receiving unit 22a receives a request to acquire a right to speak from the user terminal. The permission unit 22b permits a request to acquire a right to speak. The assigning unit 22c assigns a callable time to a user terminal that is permitted to speak. The transmission means 22d transmits data indicating the allocated call possible time to the user terminal permitted to give the floor acquisition request. The first communication unit 22e performs negotiation for establishing a connection with the user terminal. The second communication unit 22f negotiates the callable time allocated to the user terminal 21 with the user terminal. In the first embodiment, the functions of the first communication unit 22e and the second communication unit 22f are not used.

  When the user terminal 21 wants to speak, he / she presses the call button 17 to transmit a floor request acquisition request (Floor request) to the PoC server 22 (step S201). The PoC server 22 receives a request to acquire a right to speak from the user terminal 21 and permits the request to acquire a right to speak. Next, the available call time is assigned to the user terminal 21 that is permitted to speak. Then, the data indicating the talkable time is added to the floor-right notification (Floor granted) indicating that the floor-right acquisition request has been granted and transmitted to the user terminal 21 (step S202).

  The user terminal 21 receives the floor acquisition notification, starts “call” (RTP: Talk burst transmission of voice data), and displays the available call time on the display unit 14 of the user terminal 21 to enable a call. Inform the user of the time.

  In this case, the following can be mentioned as a form of notification to the user of the callable time. (1) The display unit 14 displays the remaining callable time as a countdown number. (2) The speaker 12 outputs “10 seconds before”, “5 seconds before”, “end”, etc., and outputs the remaining callable time by voice. (3) At regular intervals of several seconds, the remaining callable time is notified by sounding or vibration of the vibrator according to the remaining callable time. (4) A light emitting element such as a light emitting diode (LED) is turned on or blinked according to the remaining callable time. Further, the notification form may be any combination of the above. Furthermore, the notification form may be any form as long as the notification method can be recognized by the user.

  FIG. 3 shows a sequence from when the user terminal 31 (UE # 1) requests the right to speak, obtains the right to speak from the PoC server 32, and starts a call in the PoC service of this embodiment. In FIG. 3, UE (User Equipment) is a user terminal, Floor Request is a floor acquisition request, Floor Grant is a floor acquisition notification, Floor Taken is a notification indicating that another person has acquired the floor, and RTP is voice data. Represent.

  First, when no user terminal has the right to speak (Floor Idle) (Step S301), the user terminal 31 presses the call button 17 (Press PoC Button: Step S302), and the PoC server 32 has the right to speak. (Floor Request: Step S303). When the PoC server 32 grants the right to speak to the user terminal 31, the PoC server 32 adds the data indicating the available call time to the floor acquisition notification indicating that and transmits it to the user terminal 31 (Floor Grant: step S306). At this time, the PoC server 32 notifies the other user terminal 33 (UE # 2) that the right to speak is given to the user terminal 31 (Floor Taken: step S304). Thereafter, the user terminal 31 starts a call with the user terminal 33 via the PoC server 32 (media streaming: steps S308 and S309).

  FIG. 4 shows a sequence in which the user terminal 31 releases the right to speak while speaking in the PoC service of this embodiment. In FIG. 4, Floor Release represents a floor release, Floor Idle represents a floor idle state, and Last Burst packet represents the last packet of a voice call. When the user terminal 31 has the right to speak (Floor Granted: Step S401), after the last speech of the user terminal 31, the call button 17 is released to release the right to speak (Release PoC Button: Step S402). The last packet of the voice call is transmitted from the user terminal 31 to the PoC server 32 (Last Burst Packet: Step S403), and further transmitted from the PoC server 32 to the user terminal 33 (Last Burst Packet: Step S404). Thereafter, the PoC server 32 notifies the user terminal 31 and the user terminal 32 that the floor has been released (Floor Idle) (steps S406 and S408).

  FIG. 5 shows a sequence for releasing the right to speak when the user terminal 31 is in the middle of speaking in the PoC service of the present embodiment and notified of cancellation of the right to speak by the PoC server 32. In FIG. 5, Floor Revoke represents a right to cancel the floor. Actually, the user can talk for about 2 to 3 seconds after the notification of cancellation of the right to speak (however, the number of seconds after the notification of cancellation of the right to speak can be determined by the PoC server 32 or the PoC). Depends on the operator of the server 32).

  When the user terminal 31 has the right to speak (Floor Granted: Step S501), the PoC server 32 notifies the user terminal 31 of the cancellation of the right to speak (Floor Revoke) (Step S502). Then, the user terminal 31 releases the right to speak by releasing the pressing of the call button 17 (Floor Release: step S504). Thereafter, the PoC server 32 notifies the user terminal 31 and the user terminal 32 that the floor has been released (Floor Idle) (steps S505 and S507).

  As described above, according to the present embodiment, the PoC server 32 transmits the data indicating the available call time to the user terminal 31, so that the available call time can be grasped in advance at the start of the call on the terminal side. Therefore, the convenience of the PoC service is improved.

(Second Embodiment)
The internal configurations of the user terminal and the PoC server in this embodiment are the same as those described in the first embodiment. However, in this embodiment, the receiving means 22a, the permitting means 22b, the assigning means 22c, and the transmitting means 22d included in the PoC server 22 are not used, and the first communication means 22e and the second communication means 22f are not used. Use the function.

  FIG. 6 shows an outline of a sequence in the case where the PoC server notifies the user terminal of the available call time during SIP / SDP negotiation before starting a call in the PoC service according to the second embodiment of the present invention. . First, the PoC server 22 negotiates with the user terminal 21 by SIP / SDP (Session Initiation Protocol / Session Description Protocol) for establishing a connection. At this time, the PoC server 22 negotiates the callable time allocated to the user terminal 21 and the user terminal 21. However, the PoC server 22 determines whether to accept a request from the user terminal 21.

  FIG. 7 shows a sequence in the case where the user terminal 21 negotiates with the PoC server 22 via the IMS core 71 in the PoC service of the present embodiment. First, before starting a call, the user terminal 21 transmits a SIP INVITE signal to the IMS core 71 to establish a SIP Session (step S701). This SIP INVITE signal is relayed by the IMS core 71 and transmitted to the PoC server 22 (step S703). At this time, a request parameter for negotiating with the PoC server is set for the callable time using the Session Description Protocol (SDP) in the Mesage Body of the SIP INVITE signal.

  Next, the PoC server 22 returns a response (SIP Final response) to the parameters proposed from the user terminal 21 and the call duration information data to the user terminal 21 via the IMS core 71 (steps S705 and S706). The SDP includes an AMR codec rate used for a call and a port number for receiving voice. Note that the SIP Final response is a response signal from the PoC server 22 and is a SIP 200 OK or SIP 202 Accepted signal if session establishment is OK.

  As described above, according to the present embodiment, the PoC server negotiates the callable time with the user terminal at the time of negotiation by SIP / SDP before the call is started, so that the call can be made in advance before the call starts on the terminal side. Since the possible time can be grasped, the convenience of the PoC service is improved.

(Third embodiment)
The internal configurations of the user terminal and the PoC server in this embodiment are the same as those described in the first embodiment. However, the functions of the user terminal and the PoC server of the present embodiment are different from those described in the first embodiment.

  FIG. 8 shows an outline of a sequence in the case where the user terminal transmits a speech time extension request for extending the call time to the PoC server during the call in the PoC service of the third embodiment of the present invention. First, the functions of the user terminal 21 and the PoC server 22 of this embodiment will be described with reference to FIG. The user terminal 21 includes a transmission unit 21a that transmits a request to extend a speaking time to the PoC server while a speaking right is assigned.

  The PoC server 22 includes a reception unit 22g, a permission unit 22h, a transmission unit 22i, and a notification unit 22j. The receiving means 22g receives a speech time extension request from a user terminal to which a speech right is assigned. The permission unit 22h determines that there is no request for acquiring the right to speak from a user terminal other than the user terminal to which the right to speak is assigned, and permits the request to extend the speech time. The transmission means 22i transmits a speech time extension notification to the user terminal that has permitted the speech time extension request. The notification means 22j notifies the user terminal that the request for extending the speech time is permitted.

  The user terminal 21 to which the right to speak is assigned transmits a speech time extension request to the PoC server 22, and the PoC server 22 receives the speech time extension request (step S801). The PoC server 22 determines that there is no request for acquiring the right to speak from other than the user terminal 21, and permits the request to extend the speech time. The PoC server 22 transmits a speech time extension notification indicating that the speech time has been extended to the user terminal 21 that has permitted the speech time extension request (step S802). At this time, the PoC server 22 notifies the user terminal 21 of the extended callable time together with the notification time extension notification.

  FIG. 9 shows a sequence in the case where the user terminal 31 having the right to speak transmits a speech time extension request to the PoC server 32 in the PoC service of this embodiment. First, in order to extend the callable time (step S903), the user terminal 31 requests the PoC server 32 to extend a speech time (Floor Granted: Step S901, Talk Burst: S902, Burst Packet: S904). Floor Extension) is transmitted (step S905). The PoC server 32 sends a speech time extension notification to the user terminal 31 when allowing the extension request of the user terminal 31 (Floor Extensted) (step S906), and rejects the extension of the speech time when rejecting the user extension request. Send a notification (Floor Not Extented).

  In this case, the determination as to whether the PoC server 32 permits a request to extend the right to speak from the user terminal 31 is based on the presence or absence of a request to acquire a right to speak from another terminal. In addition, (1) only specific users (determined by the call initiator, group owner, priority level, etc.) are allowed. (2) Check how many times the user has requested to extend, and reject if it exceeds a certain number. Examples such as

  FIG. 10 shows a flowchart when the PoC server 32 that has received the extension request determines whether or not the extension request is permitted. When the PoC server 32 receives an extension request from the user terminal 31 (step S1001), the PoC server 32 determines whether there is a request for acquiring a right to speak from another terminal (a request for acquiring a right to speak from another terminal is queued). (Step S1002). In step S1002, when a request to obtain a right to speak from another terminal is queued (No), the extension request from the user terminal 31 is rejected, and Floor Not Extented is transmitted to the user terminal 31 (step S1006).

  On the other hand, in step S1002, if a request to acquire a right to speak from another terminal is not queued (Yes), it is determined whether the user terminal 31 is a call starter (step S1003). If the user is not the call initiator (No), the extension request for the user terminal 31 is rejected, and Floor Not Extented is transmitted to the user terminal 31 (step S1006).

  On the other hand, if it is determined in step S1003 that the user is the call initiator (Yes), it is determined whether the user's extension request is, for example, five times or less (step S1004). If the user's extension request is more than five times (No), the user's extension request is rejected, and Floor Not Extented is transmitted to the user (step S1006).

  On the other hand, in step S1004, when the user's extension request is 5 times or less (Yes), the user's extension request is permitted, and Floor Extented is transmitted to the user (step S1005). As described above, the PoC server 32 transmits Floor Extented when permitting the user's extension request, and transmits Floor Not Extented when rejecting the extension request.

  With respect to the application method of the extension time, (1) the call allowed time (for example, 2 minutes) is added to the call available time (for example, 1 minute) before the extension request, and the call allowed time (3 minutes) is obtained. (2) Instead of the call possible time (for example, 1 minute) before the extension request, the time allowed for extension (for example, 2 minutes) is used as the new call available time (2 minutes). (3) An example of specifying an absolute time (for example, up to 3:15) using a standard time, for example, GMT (Greenwich Mean Time) can be considered.

  As described above, according to the present embodiment, in the PoC service, the communication terminal requests the PoC server to extend the speech time, thereby extending the callable time allocated from the PoC server by the user of the terminal. Therefore, the convenience of the PoC service is improved.

  In the above description, it is determined whether or not the request to extend the speech time is permitted on the condition that the user is a call starter. However, in addition to the call starter, the group owner and the user with a high priority level. It may be a condition that the user is a specific user.

  According to the present invention, since data indicating the allocated callable time is transmitted to the terminal, the terminal that has received the data indicating the callable time can grasp the callable time. It is useful for a communication program and a communication terminal in a PoC (push to talk over cellular) service.

The internal block diagram of the user terminal in the PoC service for demonstrating the 1st Embodiment of this invention In the PoC service of this embodiment, the figure which shows the outline of a sequence in case the PoC server 22 notifies the telephone time to the user terminal 21 which acquired the right to speak. The figure which shows the sequence until the user terminal 31 requests the right to speak, acquires the right to speak from the PoC server 32, and starts a call in the PoC service of this embodiment. In the PoC service of this embodiment, the figure which shows the sequence which releases the floor when the user terminal 31 speaks The figure which shows the sequence which cancels | releases the right to speak and is released from the PoC server 32 while the user terminal 31 is speaking in the PoC service of this embodiment. The figure which shows the outline of the sequence in the case of the PoC service of the 2nd Embodiment of this invention in case of negotiation (Negotiation) by SIP / SDP before a telephone call starts and a PoC server notifies a user terminal of a telephone call possible time. The figure which shows the sequence in case the user terminal 21 negotiates with the PoC server 22 via the IMS core 71 in the PoC service of this embodiment. The figure which shows the outline of the sequence in the case of transmitting the speech time extension request | requirement for extending the talk time in the PoC service of the 3rd Embodiment of this invention to a PoC server during a call. The figure which shows the sequence in the case of the PoC service of this embodiment in case the user terminal 31 which has a speech right transmits a speech time extension request to the PoC server 32. The figure which shows the flowchart at the time of the PoC server 32 which received the extension request | requirement determining whether extension request | requirement permission is possible. Schematic diagram of PoC service

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Microphone 12 Speaker 13 Input part 14 Display part 15 Timer 16 Floor control part 16a, 21a Transmission means 16b Reception means 16c Notification means 17 Call button 18 Communication control part 19 SIP control part 19a 1st communication means 19b 2nd communication Means 19c Notification means 21 User terminal 22, 32, 1103 PoC server 22a, 22g Receiving means 22b, 22h Authorization means 22c Assignment means 22d, 22i Transmission means 22e First communication means 22f Second communication means 22j Notification means 31 User terminal # 1
33 User terminal # 2
71,1102 IMS Core
1101 User terminal A
1104 User terminal B
1105 User terminal C

Claims (9)

In a PoC service that realizes half-duplex communication using packet communication between a plurality of terminals, a communication program for controlling relay of communication between the plurality of terminals, the computer comprising:
Receiving means for receiving a request to obtain a floor from the terminal;
Permission means for permitting the request to obtain the floor,
Allocating means for allocating callable time for a terminal permitted to obtain the floor
Transmitting means for transmitting data indicating the allocated callable time to a terminal that is permitted to obtain the right to speak.
Communication program to function as   The communication program according to claim 1, wherein the transmission unit transmits the speech right acquisition notification indicating that the request to acquire the right to speak is added with data indicating the callable time. In a PoC service that realizes half-duplex communication using packet communication between a plurality of terminals, a communication program for controlling relay of communication between the plurality of terminals, the computer comprising:
A first communication means for performing negotiation for establishing a connection with a terminal;
A communication program for functioning as a second communication means for negotiating a callable time allocated to a terminal with the terminal. A communication terminal that performs a half-duplex call using packet communication via another server and a server equipped with the communication program according to claim 1,
Transmitting means for transmitting a floor acquisition request to the server;
Receiving means for receiving, from the server, data indicating a callable time allocated to the terminal;
Informing means for informing the user of the available call time indicated by the received data;
A communication terminal comprising: A communication terminal that performs a half-duplex call using packet communication via another server and a server equipped with the communication program according to claim 2,
First communication means for negotiating with the server for establishing a connection;
Second communication means for negotiating a callable time allocated to the server and the terminal;
Informing means for informing the user of the available call time allocated by the negotiation;
A communication terminal comprising: It has a time measuring means to measure the elapsed time after the start of the call,
The communication terminal according to claim 4 or 5, wherein the notification means notifies the user of the call possible time by displaying the remaining call available time. It has a time measuring means to measure the elapsed time after the start of the call,
The communication terminal according to claim 4 or 5, wherein the notifying means notifies the user of the available call time by outputting the remaining available call time by voice. It has a time measuring means to measure the elapsed time after the start of the call,
The communication terminal according to claim 4 or 5, wherein the notification means notifies the user of the call available time by ringing or vibrating according to the remaining call available time. It has a time measuring means to measure the elapsed time after the start of the call,
The communication terminal according to claim 4 or 5, wherein the notification means notifies the user of the call available time by causing the light emitting element to emit light according to the remaining call available time.

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