JP4614127B2 - PoC / W communication system, PoC server, PoC / W communication method, and PoC / W communication program - Google Patents

Description

  The present invention relates to a communication system, and more particularly, to a communication system using PoC / W (Push to Talk over Cellular / Wireless) communication.

  In recent years, attention has been focused on PoC / W (Push to Talk over Cellular / Wireless) using a cellular network such as a mobile phone. The PTT (Push to Talk) function is a technology or service that allows you to talk like a “push” or “speak” transceiver, and allows you to talk instead of dialing the other party's phone number like a mobile phone. By selecting a partner and pressing a button, one-to-one or one-to-many calls can be made. For this reason, PoC / W is particularly suitable when the user needs to repeatedly and irregularly call the entire group or a specific individual.

  The PTT function is one of so-called VoIPs that make calls over a data communication network using the Internet protocol, and has been developed for portable terminals such as mobile phones and PDAs, and standardization of specification methods is being promoted. Unlike a normal circuit switching method, since a data communication network is used, the call cost is reduced, so there are great benefits for users.

  In PoC / W, after the connection with the other party, the voice can be transferred to the other party only while the call button is pressed, but the voice from the other party cannot be heard while the button is pressed. In other words, in order to have a conversation, it is necessary to press and release the buttons with a short interaction with each other. Conventionally, a user who wishes to speak cannot obtain the right to speak unless he / she continues to press the call button. For this reason, an operator whose hands are blocked or a driver who is driving cannot operate the buttons, so that there is a problem in operability that the right to speak cannot be obtained.

  In PoC / W, it is possible to simultaneously connect to a plurality of partner users, and transmit voice to all other users in the group from a terminal that is pressing a call button. However, voice cannot be transmitted from two or more terminals at the same time. For this reason, the user needs to wait for the user who has the right to speak to finish speaking or decide the order of speaking in advance.

  A technique using the PTT function is disclosed in Japanese Patent Application Laid-Open No. 2004-289841 (see Patent Document 1). In this disclosed example, the calling party communicates with the wireless network so that the wireless network initiates a push-to-talk operation for the calling party and outgoing traffic channel simultaneously. The calling mobile station or calling party sends a short data burst (SDB) message requesting the start of a push-to-talk operation, and the SDB message is instructed to perform the calling party's call. Include. As described above, the waiting time in the push-to-talk setting is shortened.

However, when transmitting a message, it is necessary to operate the wireless terminal on the calling side to communicate with the wireless network to obtain the right to speak.
JP 2004-289841 A

  An object of the present invention is to provide a PoC / W communication system, a PoC server, and a PoC that can acquire a right to speak and transmit voice to other terminal devices without requiring terminal operation by a user in PTT (Push to Talk) communication. It is to provide a / W communication method and a PoC / W communication program.

  Another object of the present invention is to provide a PoC / W communication system, a PoC server, a PoC / W communication method, and a PoC that can grant a right to speak to terminal devices registered in the same group based on presence information indicating the state of the terminal device. It is to provide a / W communication program and a speaking right designation method.

  [Means for Solving the Problems] will be described below using the numbers and symbols used in [Best Mode for Carrying Out the Invention] in parentheses. This number / symbol is added to clarify the correspondence between the description of [Claims] and the description of the best mode for carrying out the invention. It should not be used for interpreting the technical scope of the invention described in [Scope].

  A PoC / W (Push to Talk over Cellular / Wireless) communication system according to the present invention includes a plurality of terminal devices (2, 3) connected to a communication network (5) and a PoC server connected to the communication network (5). (1). The PoC server (1) is a terminal device that receives a right-to-speak signal for transmitting a right-to-speak signal for granting a right to speak in PTT (Push to Talk) communication to any one of the terminal devices (2, 3). (3) converts the voice into a voice packet using the voice input to the terminal device (3) as a trigger, and transfers the voice packet to the other terminal device (3). In this way, the terminal device (3) can acquire the right to speak from the other terminal devices (2, 3), and transmits the voice to the other terminal devices (2, 3) without requiring any user operation. Can do.

  The plurality of terminal devices of the PoC / W communication system according to the first aspect include a designated terminal (2) and a first terminal device (for example, 3-A), and the designated terminal (2) grants the right to speak. Nomination information for designating the terminal device is transmitted to the PoC server (1), and the PoC server (1) transmits a floor signal to the first terminal device (for example, 3-A) according to the nomination information. . Further, the PoC server (1) duplicates the voice packet transmitted from the first terminal device (for example, 3-A) given the right to speak by the right-to-speak signal, and the voice packet is transferred to the designated terminal (1) or / And transfer to the second terminal device (eg, 3-B).

  Further, the PoC server transmits a connection invitation signal for executing PTT communication to the plurality of terminal devices (3), and any one of the plurality of terminal devices (3) responds to the connection invitation signal. Then, a participation announcement signal is transmitted to the PoC server. The PoC server (1) establishes a session between the terminal device that transmits these participation announcement signals and the PoC server (1), and performs PTT communication.

  The terminal device (3) having established a session with the PoC server (1) transmits presence information indicating the state of the terminal device (3) to the PoC server (1), and the PoC server (1) The user information in which the presence information is associated with the terminal device (3) is transmitted to the designated terminal (2), and the designated terminal (2) displays the user information. With the above configuration, the user who operates the nominated terminal (2) refers to the presence information, determines the terminal device to which the right to speak is given, and operates the nominated terminal (2) to operate the terminal device (for example, The right to speak can be granted to 3-A).

  An external server (4) connected to the communication network (5) and holding the location information of each of the terminal devices (3) is further provided, and the external server may transmit the location information to the PoC server (1). preferable. The PoC server (1) transmits user information associating the position information with the terminal device (3) to the nominated terminal (2), and the nominated terminal (2) displays the user information.

  The PoC server (1) of the PoC / W communication system according to the second aspect is presense indicating the states of the first and second terminal devices (3) transmitted from the first and second terminal devices (3). Based on each of the information, the terminal device (3) to which the right to speak is determined as the first terminal device (for example, 3-A), and the floor signal is transmitted to the first terminal device (for example, 3-A). Then, the voice packet transmitted from the first terminal device (3-A) to which the floor is granted by the floor signal is copied, and the voice packet is transferred to the second terminal device (for example, 3-B). In this way, voice can be transferred in PTT communication by automatically designating the right to speak.

  As described above, the PoC / W communication system according to the present invention grants the right to speak in PTT communication to the terminal device (3), and does not require operation of the terminal device, and the voice is transmitted to the other terminal devices (2, 3). Can be sent to.

  According to the PoC / W communication system, the PoC server, and the speaking right nomination method according to the present invention, the right to speak is acquired without depending on the terminal operation by the user in the PTT communication, and the voice is transmitted to the other terminal devices registered in the group. Can be sent.

  Further, the right to speak can be given to a specific terminal device among the terminal devices registered in the group based on the presence information indicating the state of the terminal device.

  Embodiments of a PoC / W communication system according to the present invention will be described below with reference to the accompanying drawings. In the present embodiment, a PoC / W communication system that performs PTT (Push to Talk) communication using communication network 5 that is a cellular network capable of IP communication will be described as an example. A case where the communication network 5 is used as a cellular network is described as a normal mode, and a case where PTT communication is performed as an IP network is described as a PTT communication mode.

(First embodiment)
A first embodiment of the PoC / W communication system according to the present invention will be described with reference to FIGS. 1, 2, 5 and 6.

(Constitution)
FIG. 1 is a configuration diagram of a PoC / W communication system according to a first embodiment of the present invention. The PoC / W communication system includes a PoC server 1, a designated terminal 2, at least one or more portable terminals 3-A to 3-n, and an external server 4. Connected with. There may be a plurality of designated terminals 2, and at least one portable terminal 3 is associated with each designated terminal 2 and registered in the PoC server 1 as a group list. The PoC server 1 according to the present embodiment establishes a session with the mobile terminal 3 in the group list in response to a request from the designated terminal 2 and causes PTT communication to be executed between the devices.

  The designated terminal 2 is preferably a terminal device including a display device such as a PC, a mobile phone, or a PDA, an information processing device, and an input device, and is connected to the communication network 5 and operated by the input device to perform PTT communication. The right to speak is given to the portable terminals 3 in the same group registered in the PoC server 1 in the mode. Further, user information used as a reference for the user using the nominated terminal 2 to determine the right to speak is displayed on the display device.

  The mobile terminal 3 is a mobile phone, PDA, or mobile PC that can communicate with each other by connecting to a communication network 5 such as a cellular network capable of IP communication or an IP packet network such as a LAN. The mobile terminal 3 is preferably a mobile phone that can be switched between a normal mode in which a telephone line can be used and a PTT communication mode in which PTT communication can be used. The portable terminal 3 switches from the normal mode to the PTT communication mode in response to the INvite signal from the PoC server. In addition, the portable terminal 3 to which the right to speak is granted in the PTT communication mode converts the voice input to the microphone held therein into a voice packet and transmits the voice packet to the PoC server via the communication network 5. The PoC server 1 transfers the transmitted voice packet to the other portable terminal 3 and the designated terminal 2 in the related same group list.

  The PoC / W communication system according to the present invention is suitably used when a supervisor manages the work status of each work site in a factory. For example, the supervisor operates the nominated terminal 2 and the workers at the respective work sites use the portable terminals 3-A to 3-n. In the PTT communication mode, the supervisor operates the nominated terminal 2 to grant the right to speak to the worker, and the worker who is given the right to speak reports the work status, failure status, etc. to the supervisor using the mobile terminal 3. can do. In addition, it is possible to simultaneously report the situation to other mobile terminals 3 registered in the same group list.

  FIG. 2 is a configuration diagram of the PoC server 1. The PoC server 1 includes a CPU 11, a communication unit 12, presence information D / B 13 and group list D / B 14 stored in a storage device such as a memory and a hard disk, or a storage medium such as MO and CDROM, a presence control unit 15, A group list management unit 16 and a PTT control unit 17.

  The presence control unit 15, the group list management unit 16, and the PTT control unit 17 are programs stored in a storage device such as a memory or a hard disk, and are executed by the CPU 11.

  The communication unit 12 includes a network interface connected to the communication network 12 and a transmission / reception control unit that executes transmission / reception of signals and data, and signals between the designated terminal 2, the mobile terminals 3 -A to 3 -n, and the external server 4. And send and receive data.

  In the PTT communication mode, the presence control unit 15 associates the presence information transmitted from the mobile terminal 3 with the mobile terminal 3 and stores it in the presence information D / B 13. In addition, the information is transmitted to the designated terminal 2 together with the position information acquired by the user information acquisition unit 171. As shown in FIG. 8A, the structure of the presence information D / B 13 stores a terminal ID for identifying the mobile terminal 3 and the location information and presence information of the mobile terminal 3 in association with each other. The presence information is preferably information used by the designated terminal 2 to determine the portable terminal 3 to which the right to speak is given. Information indicating the current state of the user such as the work status of the user using the mobile terminal 3 (for example, “moving to the work site by car”, “working”, “during customer service”, “lunch break” Character information such as “going out” for example), information indicating the status of the work plant (for example, character information such as “failure” and “in operation” and a warning signal indicating the failure), and the connection status of the mobile terminal 3 itself (For example, a signal indicating “out of service area” or “connectable”, character information such as “using other application”). The position information is information indicating the position of the user, and is position information of each mobile terminal 3 transmitted from the external server 4. For example, character information indicating “plant A”, “resting place” or “moving” which is the position of the terminal device 3, position coordinates, image information including a map, and the like. The position information is position information transmitted from each portable terminal 3 to the external server 4 or user-specific (fixed) position information registered in advance in the external server. Further, as position information transmitted from each mobile terminal 3 to the external server 4, position information input to the mobile terminal 3 by a user operation, an image including a position coordinate by GPS and a map mounted on the mobile terminal 3 Information can be used.

  The group list management unit 16 generates, deletes, and edits a PoC / W group based on information input by a user from an input device (not shown), and stores it in the group list D / B 14 as a group list. A group list is extracted based on input information from the input device and displayed on a display device (not shown). The group list may be generated / deleted / edited based on information transmitted from the designated terminal 2. As shown in FIG. 7, the structure of the group list D / B 14 includes, for each designated terminal 2, a group ID for identifying a group, a terminal ID for identifying a portable terminal 3, a designated terminal 2 such as an IP address and a URL, and the like. The PoC / W address of the portable terminal 3 is stored in association with it. Further, the presence or absence of the right to speak is given to each portable terminal 3.

  The PTT control unit 17 includes a user information acquisition unit 171, a nomination unit 172, a speaking right management unit 173, a voice packet duplication unit 174, and a packet transmission unit 175. The PTT control unit 17 duplicates the voice connection transmitted from the mobile terminal 3 to which the session connection processing between the devices registered in the group list, the control of the right to give the right to speak, and the right to speak. Transfer to another portable terminal 3 is executed.

  The user information acquisition unit 171 stores the location information of each mobile terminal 3 received from the external server 4 via the communication unit 12 in the presence information D / B 13 in association with the terminal ID and presence information of the mobile terminal 3. To do.

  The floor control unit 173 receives the nomination information transmitted from the nominated terminal 2, sets a flag with the floor to the mobile terminal that grants the floor of the group list, and gives the floor 3 the mobile terminal 3 that has been granted the floor. Issue a floor signal that gives the floor. In addition, the right to speak flag is switched based on the new nomination information, and the right to speak is switched.

  The voice packet duplicating unit 174 duplicates the voice packet transmitted from the portable terminal 3 and transfers the voice packet from the packet transmitting unit 175 to the portable terminal 3 and the designated terminal 2 in the same group.

(Operation)
FIG. 5 is an operation sequence diagram of the floor assignment process and the voice transmission process in the first embodiment of the PoC / W communication system according to the present invention.

  In the present embodiment, it is assumed that the designated terminal 2 and the mobile terminals 3-A, 3-B, and 3-C are registered in the group list of the PoC server 1 as the same group. Note that the group list may be registered in the PoC server 1 from the designated terminal 2 via the communication network 5 by the user's operation, or may be input directly into the PoC server 1.

  An invite signal for requesting participation in PTT communication is transmitted from the designated terminal 2 to the PoC server 1 via the communication network 5 by the operation of the input device of the user (supervisor) (step S2).

  The connection unit 173 of the PoC server 1 transmits an Invite signal to the mobile terminals 3-A to 3-C corresponding to the group ID included in the Invite signal (Step S4). Receiving the Invite signal, the mobile terminals 3-A and 3-B each transmit a participation expression signal for permitting connection for PTT communication to the PoC server 1 (step S6). At this time, even if the portable terminal 3 automatically transmits a participation announcement signal to the source PoC server 1 upon receiving the Invite signal, the mobile terminal 3 requests participation of the PTT communication by sound or display based on the Invite signal, and the user's operation The participation expression signal may be transmitted by. Note that the portable terminal 3-C in the present embodiment cannot be connected to the communication network 5 because it is out of the communication range of the communication network 5 or is out of order, and cannot receive the Invite signal. For this reason, the portable terminal 3-C cannot transmit a participation announcement signal.

  The connection unit 172 of the PoC server 1 responds to the participation announcement signal received from each of the mobile terminals 3-A and 3-B, and each of the designated terminal 2 and the mobile terminals 3-A and 3-B, and PoC. A session with the server 1 is established, and the portable terminals 3-A and 3-B change from the normal mode to the PTT communication mode (step S8). The session is preferably established based on SIP (Session Initiation Protocol). The mobile terminals 3-A and 3-B connected to the PoC server 1 by session establishment each transmit their own presence information to the PoC server 1 (step S10). For example, when the user who uses the mobile terminal 3-A is working, presence information indicating that the user is working is transmitted to the PoC server 1. The presence control unit 15 of the PoC server 1 associates the presence information “working” with the terminal ID “mobile terminal 3-A” and stores them in the presence information D / B 13. In addition, the user information acquisition unit 171 requests the external server 4 for the location information of the mobile terminals 3-A and 3-B connected in the session, and acquires, for example, the location information “Plant A” and “Plant B” from the external server 4. Then, it is stored in the presence information D / B 13 corresponding to each terminal ID. If the mobile terminal 3-C is out of service area and cannot be connected, or if the connection is cut off due to movement or failure of the communication network 5 after the session is established, the mobile terminal 3-C shown in FIG. As described above, the presence information stores information indicating disconnection (for example, “out of service area”). When the presence information from all the mobile terminals 3 connected in the session is acquired, the presence control unit 15 extracts the presence information and position information of the target mobile terminals 3-A and 3-B from the presence information D / B 13, The user information is transmitted to the designated terminal 2 (step S12).

  The designated terminal 2 displays the user information received from the PoC server on the display device (step S14). The user of the nominated terminal 2 can grasp the status of the portable terminals 3-A and 3-B by looking at the displayed user information, and can be used as a reference for determining the portable terminal 3 to which the right to speak is given. Nomination information for granting the right to speak to the portable terminal 3-A is transmitted to the PoC server 1 by the user's operation from the input device (step S16). At this time, even if the user operates the input device and selects the portable terminal to which the right to speak is selected from the portable terminal names displayed on the display device of the designated terminal 2, a button or the like previously assigned to the portable terminal is selected. You may select by pressing. The nomination information includes the terminal ID of the portable terminal 3 to which the right to speak is given, and the floor management unit 173 of the PoC server 1 refers to the group list, for example, the portable terminal 3 corresponding to the terminal ID, for example, the portable terminal 3 A floor signal is transmitted to the terminal 3-A (step S18). The mobile terminal 3-A that has received the floor-right signal notifies the user that the floor-right has been granted to the mobile terminal 3-A by a notification function such as sound or lamp (step S20). A user who knows that the right to speak is given by sound or lamp starts a call to the microphone included in the mobile terminal 3-A. Using the input voice as a trigger, the portable terminal 3-A converts the voice into a voice packet and transmits it to the PoC server 1 (step S22). Note that a visual notification function such as a lamp or display for notifying the acquisition of the right to speak is lit until the right to speak is released.

  The voice packet duplication unit 174 of the PoS server duplicates the voice packet transmitted from the portable terminal 3-A. Next, referring to the group list, the mobile terminal 3-B is used as a voice packet transmission address obtained by duplicating the PoC / W addresses of the mobile terminal 3 and the designated terminal 2 other than the mobile terminal 3-A registered as the same group. And 3-C, transfer to the designated terminal 2 (step S24). Thus, the user who uses the portable terminal 3-A to which the right to speak is input another voice (speaks) without operating the portable terminal 3-A. It is possible to transmit to 3-C and the designated terminal 2 and to transmit by PTT communication even in a situation where the mobile terminal 3 cannot be operated.

  FIG. 6 is an operation sequence diagram of the right holder switching process and the PTT communication end process of the PoC / W communication system according to the present invention.

  The case where the floor holder is switched from the portable terminal 3-A to the portable terminal 3-B will be described.

  When the user who operates the nominated terminal 2 operates the input device and designates the portable terminal 3-B as the right holder, nomination information for granting the right to speak is transmitted to the PoC server 1. (Step S32). The connection unit 172 of the PoC server 1 refers to the group list and transmits a speech stop signal for canceling the right to speak to the mobile terminal 3-A that has the right to speak. A floor signal is transmitted to -B (step S34). At this time, the speaking right management unit 173 sets the speaking right of the portable terminal 3-A in the group list to “none” and sets the speaking right of the portable terminal 3-B to “present”. The mobile terminal 3-A uses the received speech stop signal as a trigger to stop the input voice from being converted into a voice packet and transmit it, and notifies the PoC server 1 that this stop process has been executed. The portable terminal 3-B that has received the floor signal converts the voice input by the user into a voice packet and transmits it to the PoC server 1 by the same operation as steps S20 and S22 (step S36).

  The voice packet duplication unit 174 of the PoS server 1 transfers the voice packet transmitted from the portable terminal 3-B to the designated terminal 2, the portable terminals 3-A and 3-C by the same operation as in step S24 (step S38). . In this way, the right holder can be switched from the portable terminal 3-A to 3-B by the designated terminal 2 without operating the portable terminals 3-A and 3-B.

  When ending the PTT communication, a PoC / W end signal is transmitted from the designated terminal 2 to the PoC server 1 by a user operation (step S42). The PoC server 1 issues a PoC / W end signal to the mobile terminals 3-A and 3-B connected to the session based on the PoC / W end signal (step S44). Each of the mobile terminals 3-A and 3-B that have received the PoC / W end signal transmits an end permission signal to the PoC server 1 (step S46). When the PoC server 1 receives the termination permission signal, the PoC server 1 releases the session between the portable terminals 3-A and 3-B and the designated terminal 2. The mobile terminals 3-A and 3-B end their respective PTT communication modes and return to the normal mode (here, the communication function as a mobile phone).

  As described above, the PoC / W communication system according to the present invention gives a speaking right to the portable terminal 3 by the designated terminal 2 and transmits voice to the portable terminal 3 and the designated terminal 2 in the same group during PTT communication. can do. In addition, since presence information is transmitted from the portable terminal 3 to the designated terminal 2, the designated terminal 2 can grasp the current status of the portable terminals 3 in the group.

(Second Embodiment)
A second embodiment of the PoC / W communication system according to the present invention will be described with reference to FIGS. In the present embodiment, a PoC / W communication system using communication network 5 that is a cellular network capable of IP communication will be described as an example.

(Constitution)
FIG. 3 is a configuration diagram of the PoC / W communication system according to the second embodiment of the present invention. The configuration in the second embodiment is a configuration without the designated terminal 2 in the first embodiment. The PoC server 1 ′ grants the right to speak to the portable terminal 3 during the PTT communication, and the portable terminal 3 given the right to speak transmits the voice as a voice packet to the other portable terminals 3 in the same group.

  FIG. 4 is a configuration diagram of the PoC server 1 ′ according to the second embodiment of the present invention. The PoC server 1 ′ includes presence information D / B instead of the presence information D / B 13 in the first embodiment, and includes a speaker determination unit 173 ′ instead of the speaking right management unit 173. The speaker determining unit 173 'sets the priority order and the speech time for giving the right to speak based on the position information and / or presence information, and stores the priority in the presence information D / B 13' (see FIG. 8B). In addition, referring to the presence information D / B 13 ′, a speaking right signal and a speaking stop signal are transmitted based on the priority order and the speaking time to give a speaking right to any of the mobile terminals 3 -A to 3-n. The priority order and speech time set in the presence information D / B 13 ′ may be set corresponding to the position information and presence information, or set in advance for each portable terminal 3 regardless of the position information and presence information. May be.

(Operation)
FIG. 9 is an operation sequence diagram of speaking right nomination processing and voice transmission processing in the second embodiment of the PoC / W communication system according to the present invention.

  In the present embodiment, it is assumed that the mobile terminals 3-A, 3-B, 3-C,..., 3-n are registered in the group list of the PoC server 1 'as the same group. The group list may be registered in the PoC server 1 via the communication network 5 from one of the terminal devices 3-A to 3-n or input directly to the PoC server 1 ′ by a user operation. good.

  An invite signal for requesting participation in PTT communication is transmitted from one of the portable terminals 3-A to 3-n (here, the portable terminal 3-A) through the communication network 5 by the user's operation of the input device. '(Step S52).

  By the user's operation, the connection unit 172 of the PoC server 1 ′ transmits an Invite signal from the mobile terminals 3-A to 3-C corresponding to the group ID included in the Invite signal transmitted from the mobile terminal 3-A ( Step S54). Receiving the Invite signal, the mobile terminals 3-B to 3-n each transmit a participation expression signal for permitting connection for PTT communication to the PoC server 1 '(step S56). At this time, even if each portable terminal 3 automatically transmits a participation announcement signal to the PoC server 1 ′ that is the transmission source when receiving the Invite signal, it participates in the PTT communication by sound or display to the user based on the Invite signal. The participation announcement signal may be transmitted by the user's operation. Note that the portable terminal 3-C in the present embodiment cannot be connected to the communication network 5 because it is out of the communication range of the communication network 5 or is out of order, and cannot receive the Invite signal. For this reason, the portable terminal 3-C cannot transmit a participation announcement signal.

  The connection unit 172 of the PoC server 1 ′ responds to the participation announcement signal received from each of the mobile terminals 3-B to 3-n (excluding the mobile terminal 3-C) from the mobile terminals 3-A to 3- A session is established between each of n (excluding the portable terminal 3-C) and the PoC server 1 (step S58). The session is preferably established based on SIP (Session Initiation Protocol). The mobile terminals 3-A to 3-n (excluding the mobile terminal 3-C) connected to the PoC server 1 by establishing a session transmit their own presence information to the PoC server 1 '(step S60). The transmission of the position information and presence information is the same as step S10 in the first embodiment. At this time, a priority order and a speech time for obtaining the right to speak may be transmitted. Since the presence information of the portable terminal 3-C is the same as that of the portable terminal 3-C in the first embodiment, description thereof is omitted.

  The speaker determining unit 173 ′ of the PoC server 1 ′ refers to the presence information D / B 13 ′, determines the priority order based on the location information and presence information, and associates the presence information D / B with each terminal ID. Store in B13 '. For example, as shown in FIG. 8B, since the mobile terminal 3-A has the position information “plant A”, a higher priority is set than the mobile terminal 3-B of the position information “plant B”. Since the presence information of the terminal 3-n is “resting”, a lower priority is set than the mobile terminals 3-A and 3-B “working”. In addition, since it is not connected to the mobile terminal 3-C that is out of service area, priority order and speech time are not set. The speech time may be all set at the same time, even with time allocation based on position information and presence information as shown in FIG. Note that the priority order and the speech time may not be set by the speaker determination unit 173 ′ but may be input by the user to the mobile terminal 3 and directly acquired from the mobile terminal 3.

  The speaker determining unit 173 ′ of the PoC server 1 ′ refers to the presence information D / B 13 ′ and transmits a speech right signal to the mobile terminal 3 having a high priority, for example, the mobile terminal 3-A (step S <b> 62). The mobile terminal 3-A that has received the floor-right signal notifies the user that the floor-right has been granted to the mobile terminal 3-A by a notification function such as sound or lamp (step S64). A user who knows that the right to speak is given by sound or lamp starts a call to the microphone included in the mobile terminal 3-A. Using the input voice as a trigger, the portable terminal 3-A converts the voice into a voice packet and transmits it to the PoC server 1 '(step S66).

  The voice packet duplication unit 174 of the PoS server 1 'duplicates the voice packet transmitted from the portable terminal 3-A. Next, with reference to the group list, the mobile phone 3 as a transmission address of a voice packet in which the PoC / W address of the mobile phones 3-B to 3-n (excluding the mobile phone 3-C) registered as the same group is copied. -B to 3-n (excluding mobile phone 3-C) (step S68). Thus, the user who uses the portable terminal 3-A to which the right to speak is input other voices (speaks) without operating the portable terminal 3-A. -N (excluding mobile 3 -C) can be transmitted, and even in a situation where the user cannot operate the mobile terminal 3, transmission by PTT communication is possible.

  FIG. 10 is an operation sequence diagram of the right holder switching process in the second embodiment of the PoC / W communication system according to the present invention.

  The case where the floor holder is switched from the portable terminal 3-A to the portable terminal 3-B will be described.

  When the speaking time set in the presence information D / B 13 ′ elapses after the floor signal is transmitted to the mobile terminal 3-A, the speaker determining unit 173 ′ of the PoC server 1 ′ sends a floor stop signal. While transmitting to portable terminal 3-A (step S72), the floor signal is transmitted with respect to portable terminal 3-B (step S74). At this time, the speaker determining unit 173 'sets the speaking right of the portable terminal 3-A in the group list to "none" and sets the speaking right of the portable terminal 3-B to "present". The mobile terminal 3-A uses the received speech stop signal as a trigger to stop the input voice from being converted into a voice packet and transmit it, and notifies the PoC server 1 that this stop process has been executed. The portable terminal 3-B that has received the floor-right signal converts the voice input by the user into a voice packet and transmits it to the PoC server 1 'by the same operation as in steps S64 and S66 (step S76).

  The voice packet duplicating unit 174 of the PoS server 1 ′ sends voice packets transmitted from the portable terminal 3-B to the portable terminals 3-A to 3-n (excluding the portable terminal 3-C) by the same operation as Step S68. Transfer (step S78). In this way, the right holder can be automatically switched from the mobile terminal 3-A to 3-B without operating the mobile terminals 3-A and 3-B. In the present embodiment, switching of the portable terminal 3 having the right to speak is executed according to the speaking time, but switching conditions other than time may be used.

  When ending the PTT communication, a PoC / W end signal is transmitted to the PoC server 1 'from the portable terminal 3-A that has started the PTT communication (first transmitted the Invite signal), for example, by a user operation. The connection unit 172 of the PoC server 1 ′ that has received the PoC / W end signal receives the portable terminals 3-A to 3-n (excluding the portable terminal 3-C) as in steps S44 to S48 in the first embodiment. ), The mobile terminals 3-A to 3-n (excluding the mobile terminal 3-C) end their respective PTT communication modes and perform normal communication modes (for example, communication as a mobile phone). Return to (Function).

  As described above, in PTT communication between the mobile terminals 3-A to 3-n, a user who is working using both hands specifies the mobile terminal 3 that he / she wants to transmit without operating the mobile terminal 3. And can speak. Thereby, it is possible to periodically report the work status and the transport status to the supervisor without operating the mobile terminal 3. In addition, since the PTT function is used to transmit using the IP packet network, it is possible to make a call at a lower cost than using a telephone line.

  The embodiment of the present invention has been described in detail above, but the specific configuration is not limited to the above-described embodiment, and changes within a scope not departing from the gist of the present invention are included in the present invention. . In the present embodiment, the PoS servers 1 and 1 ′ have acquired the position information from the external server 4. However, the PoS servers 1 and 1 ′ acquire the position information directly from each portable terminal 3 that can obtain the position information by the GPS function or RFID (Radio Frequency Identification). It doesn't matter.

FIG. 1 is a configuration diagram of a PoC / W communication system according to a first embodiment of the present invention. FIG. 2 is a configuration diagram of the PoC server according to the first embodiment of the present invention. FIG. 3 is a configuration diagram of the PoC / W communication system according to the second embodiment of the present invention. FIG. 4 is a configuration diagram of the PoC server according to the second embodiment of the present invention. FIG. 5 is an operation sequence diagram of the floor assignment process and the voice transmission process in the first embodiment of the PoC / W communication system according to the present invention. FIG. 6 is an operation sequence diagram of a right holder switching process and a PTT communication end process in the first embodiment of the PoC / W communication system according to the present invention. FIG. 7 is a configuration diagram of a group list database according to the present invention. FIG. 8A is a configuration diagram in the first embodiment of the presence information database according to the present invention. FIG. 8B is a configuration diagram in the second embodiment of the presence information database according to the present invention. FIG. 9 is an operation sequence diagram of speaking right nomination processing and voice transmission processing in the second embodiment of the PoC / W communication system according to the present invention. FIG. 10 is an operation sequence diagram of the right holder switching process in the second embodiment of the PoC / W communication system according to the present invention.

Explanation of symbols

1, 1 ': PoC server 2: Designated terminal 3, 3-A to 3-n: Mobile terminal 4: External terminal 5: Communication network 11: CPU
12: Communication unit 13, 13 ': Presence information D / B
14: Group list D / B
15: Presence control unit 16: Group list management unit 17: PTT control unit 171, 171 ′: User information acquisition unit 172: Connection unit 173: Speaking right management unit 173 ′: Speaker determination unit 174: Voice packet replication unit 175: Packet transmitter

Claims (24)

A plurality of terminal devices connected to the communication network;
A PoC server connected to the communication network;
The PoC server determines a terminal device to which a right to speak in PTT (Push to Talk) communication is assigned based on presence information indicating a state of each of the plurality of terminal devices, and the terminal device to which the right to speak is assigned sends said voice signals for providing voice, replicates the voice packet transmitted from the terminal device having the speaking right by the talk burst signal, the other terminals included in the plurality of terminal devices Transfer to the device,
The talk burst signal terminal receiving the device, the voice is converted to voice packets as a trigger voice input to the terminal device, the voice packet to other terminals included in the plurality of terminal devices Transfer PoC / W (Push to Talk over Cellular / Wireless) communication system.   The PoC / W communication system according to claim 1,
  An external server connected to the communication network and holding location information of each of the plurality of terminal devices;
  The external server sends the location information to the PoC server;
  The PoC server determines a terminal device to which a right to speak is granted based on the location information.
  PoC / W communication system.   The PoC / W communication system according to claim 1 or 2,
  The PoC server sets a speech time for each of the plurality of terminal devices based on the presence information, and switches the terminal device to which the right to speak is assigned according to the speech time.
  PoC / W communication system.   In the PoC / W communication system according to any one of claims 1 to 3,
  The PoC server sets priorities of each of the plurality of terminal devices based on the presence information, and switches the terminal devices to which the right to speak is assigned in the order according to the priorities.
  PoC / W communication system.   The PoC / W communication system according to claim 2,
  The PoC server sets a speech time for each of the plurality of terminal devices based on the position information, and switches the terminal device to which the right to speak is assigned according to the speech time.
  PoC / W communication system.   The PoC / W communication system according to claim 2,
  The PoC server sets priorities of the plurality of terminal devices based on the position information, and switches the terminal devices to which the right to speak is given in the order according to the priorities.
  PoC / W communication system. In the PoC / W communication system according to any one of claims 1 to 6 ,
The PoC server transmits a connection invitation signal for executing PTT communication to the plurality of terminal devices,
Any of the plurality of terminal devices transmits a participation announcement signal to the PoC server in response to the connection invitation signal,
The PoC server establishes a session between the terminal device that transmits the participation announcement signal and the PoC server ,
A PoC / W communication system in which a terminal device that has established a session with the PoC server transmits the presence information to the PoC server . In the PoC / W communication system according to any one of claims 1 to 7 ,
The PoC server holds a group list registered by associating the plurality of terminal devices with respective unique addresses, and forwards the voice packet to the terminal device corresponding to the address according to the address. PoC / W Communications system.   A presence control unit that acquires presence information indicating a state of each of the plurality of terminal devices from a plurality of terminal devices;
  A right-to-speak signal for determining a terminal device that grants the right to speak in PTT (Push to Talk) communication based on the presence information, and to give the right to speak in the PTT communication to the terminal device that grants the right to speak A speaker determination unit that transmits
  A PTT control unit that duplicates a voice packet transmitted from the terminal device to which the floor is granted and forwards it to other terminal devices included in the plurality of terminal devices;
  With
  PoC (Push to Talk over Cellular) server.   In the PoC server according to claim 9,
  A user information acquisition unit that acquires position information of each of the plurality of terminal devices from an external server;
  The user information acquisition unit associates a terminal ID for identifying the terminal device, the location information, and the presence information and stores them in a presence information database.
  The said speaker determination part determines the terminal device which grants the said speaking right based on the said positional information, and transmits the said speaking right signal with respect to the terminal device which provides the said speaking right
  PoC server.   In the PoC server according to claim 9 or 10,
  The speaker determining unit sets a speech time for each of the plurality of terminal devices based on the presence information, and switches the terminal device to which the right to speak is assigned according to the speech time.
  PoC server.   The PoC server according to any one of claims 9 to 11,
  The speaker determination unit sets priorities of the plurality of terminal devices based on the presence information, and switches the terminal devices to which the right to speak is assigned in the order according to the priorities.
  PoC server.   In the PoC server according to claim 10,
  The speaker determining unit sets a speech time of each of the plurality of terminal devices based on the position information, and switches a terminal device to which the right to speak is assigned according to the speech time.
  PoC server.   In the PoC server according to claim 10,
  The speaker determination unit sets priorities of the plurality of terminal devices based on the position information, and switches the terminal devices to which the right to speak is given in the order according to the priorities.
  PoC server. The PoC server according to claim 14, wherein
A group list management unit that associates and registers a plurality of terminal devices as a group list;
A connection unit that establishes a session with the terminal device registered in the group list in response to a request from a specific terminal device registered in the group list;
Further comprising
The presence control unit is a PoC server that acquires presence information indicating a state of the terminal device from a terminal device in which the session is established . In the PoC server according to claim 15 ,
A group list database for storing the group list;
The group list management unit associates a group ID for identifying a group, a terminal ID for identifying the terminal device, and a PoC / W address, which is a unique address of the terminal device, and stores them in the group list database. server. A plurality of terminal devices transmitting presence information indicating respective states of the plurality of terminal devices;
Determining a terminal device to which a right to speak in PTT (Push to Talk) communication is given based on the presence information;
Transmitting the floor signal to a terminal device that grants the floor ;
The terminal device that has received the floor signal converts the voice into a voice packet using the input voice as a trigger, and
Before SL PoC / W (Push to Talk over Cellular / Wireless) communication method and a step of transferring the voice packet to other terminals associated with the terminal device to replicate the voice packets.   The PoC / W communication method according to claim 17,
  The method further includes the step of determining a terminal device to which the right to speak is determined based on position information of each of the plurality of terminal devices.
  PoC / W communication method.   The PoC / W communication method according to claim 17 or 18,
  Setting a speech time for each of the plurality of terminal devices based on the presence information;
  Switching a terminal device that grants the right to speak according to the speaking time;
  Further comprising
  PoC / W communication method.   The PoC / W communication method according to any one of claims 17 to 19,
  Setting each priority order of the plurality of terminal devices based on the presence information;
  Switching a terminal device to which the right to speak is given in an order according to the priority order;
  Further comprising
  PoC / W communication method.   The PoC / W communication method according to claim 18,
  Setting a speech time for each of the plurality of terminal devices based on the position information;
  Switching a terminal device that grants the right to speak according to the speaking time;
  Further comprising
  PoC / W communication method.   The PoC / W communication method according to claim 18,
  Setting each priority of the plurality of terminal devices based on the location information;
  Switching a terminal device to which the right to speak is given in an order according to the priority order;
  Further comprising
  PoC / W communication method.   The PoC / W communication method according to any one of claims 17 to 22,
  The PoC server sending a connection invitation signal for performing PTT communication;
  The plurality of terminal devices receiving the connection invitation signal and transmitting a participation announcement signal in response to the connection invitation signal;
  Establishing a session between the terminal device that has transmitted the participation announcement signal and the PoC server;
  Further comprising
  The step of transmitting the presence information includes a step of transmitting the presence information by a terminal device with which the session has been established.
  PoC / W communication method.   The PoC / W communication program for making a computer implement | achieve the function of the PoC server of any one of Claim 9 to 16.

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