JP2008219297A - 1:n communicating system, transmission right management apparatus, control method of transmission right management apparatus, control program, and computer-readable recording medium recording the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transmission right apparatus which can continue communication over a 1:N communication system as a whole even if communication from a terminal apparatus which has a transmission right is disconnected. <P>SOLUTION: In 1:N communication which is carried out between a portable telephone set "a" which has a transmission right, i.e., a right transmitting voice data, and at least two or more portable telephone sets "b" to "d" which receive data transmitted from the portable telephone set "a", a PoC server 51 for managing the transmission right includes a communication state management unit 5 which detects that voice communication from the portable telephone set "a" to the portable telephone sets "b" to "d" is disconnected, and a transmission right processing unit 6 which gives the transmission right to a portable telephone set selected out of the portable telephone sets "b" to "d" if communication disconnection is detected by the communication state management unit 5. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a one-to-many communication system such as PoC (Push-to Talk over Cellular) communication, in which communication is performed between one transmitter and a plurality of receivers.

  In recent years, due to the rapid development of audio and video encoding technologies, attention has been focused on one-to-many communication systems capable of communicating with a plurality of partners by simultaneously connecting to the same network.

  As an example of the one-to-many communication system, there is Push-to-Talk over Cellular (PoC) that realizes an application called Push-to-Talk (PTT) using voice in a portable communication terminal device. PoC refers to a technology and service for realizing a communication style like a transceiver called “Push-to-Talk” with a communication terminal device such as a mobile phone.

  PoC communication is possible from both sides, but the half-duplex communication method in which data transmission is always limited to one direction from one to the other is adopted. In other words, PoC communication can send voice to the connected partner only while the call button is being pressed, and cannot receive voice from the partner during that time, as with the transceiver.

  However, PoC communication has an advantage that it can be connected in just a few seconds by selecting a partner who can talk and pressing a button instead of dialing the other party's telephone number as in a conventional mobile phone. In addition, since the data communication network is used unlike the conventional circuit switching system, there is a great merit that the call cost is reduced.

  Here, as a conventional one-to-many communication system, there is a communication system as shown in FIG.

  FIG. 7 is a diagram showing a schematic configuration of a conventional one-to-many communication system. As shown in FIG. 7, a conventional one-to-many communication system 200 includes a transmission side communication device 201, reception side communication devices 202 to 204, base stations 205 and 209, packet line networks 206 and 208, and a server device. 207.

  In the conventional one-to-many communication system 200, in order for the transmitting communication device 201 to transmit data, first, a transmission right that is a right to transmit data from the server 207 via the base station 205 and the packet line network 206 is provided. get. When voice data, image data, and text data are exchanged in one-to-many communication, the transmission side communication device 201 that has acquired the transmission right transmits voice data to the server 207 via the base station 205 and the packet line network 206. Send image data and text data.

  The reception side communication device 202 receives the voice data, image data, and text data transmitted from the transmission side communication device 201 from the server 207 via the packet line network 206 and the base station 205, and also receives the reception side communication device. 203 and 204 receive voice data, image data, and text data transmitted from the transmitting communication device 201 from the server 207 via the packet network 208 and the base station 209.

  Further, as an example of a call system that realizes PoC communication, there is also a PTT call system as shown in Patent Document 1.

  FIG. 8 is a diagram showing a schematic configuration of the PTT call system of Patent Document 1. As shown in FIG.

  As shown in FIG. 8, a PTT call system 100 described in Patent Document 1 is provided for each of mobile phones 101 to 108, a network 110 connected via the Internet, etc., and an area of a predetermined size. Base stations 111 to 113 that are wirelessly connected, edge servers (ES) 121 to 123 that are provided in each base station and assign an IP address to each mobile phone, and an intermediary server 140 are configured.

The intermediary server 140 is capable of notifying the other mobile phones 101 to 107 of the PTT call when the mobile phone 108 becomes unable to continue the PTT call during the PTT call, for example. I am doing.
JP 2006-222876 A (released on August 24, 2006)

  By the way, in one-to-many communication, it is conceivable that the transmitting communication device is a mobile communication device or the like. In this case, communication is not possible because the transmitting communication device is out of service area, out of charge, or turned off. May be disconnected.

  As described above, in the conventional one-to-many communication system, when the transmission-side communication device 201 is out of service area, the communication between the transmission-side communication device 201 and the reception-side communication devices 202 to 204 is disconnected, and the server 207 generates a message such as communication cut off from the transmitting side communication device 201 and the receiving side communication devices 202 to 204, and voice data, image data, and the like are transmitted between the transmitting side communication device 201 and the receiving side communication devices 202 to 204. There is a problem that text data cannot be transmitted / received, that is, one-to-many communication is disconnected.

  In this case, in order to resume the one-to-many communication, the transmitting-side communication device 201 has to acquire the transmission right from the server 207 again through the base station 205 and the packet line network 206. There also arises a problem that it takes time to resume multi-communication.

  The present invention has been made in view of conventional problems, and its purpose is to continue communication as a whole one-to-many communication system even when communication from a terminal device having a transmission right is disconnected. An object of the present invention is to provide a transmission right management apparatus that can be used.

  In order to solve the above problems, a transmission right management device according to the present invention has one transmission terminal device having a transmission right that is a right to transmit data, and a plurality of data received from the transmission terminal device. In the one-to-many communication performed with the receiving terminal device, the transmission right management device manages the transmission right, and communication from the transmitting terminal device to the plurality of receiving terminal devices is interrupted. A communication disconnection detecting means for detecting the transmission, and a transmission for granting the transmission right to one terminal device selected from the plurality of receiving terminal devices when the communication disconnection detecting means detects the communication interruption. And a right granting means.

  In addition, the control method of the transmission right management apparatus according to the present invention includes one transmission terminal device having a transmission right that is a right to transmit data, and a plurality of reception terminals that receive data transmitted from the transmission terminal device. In a one-to-many communication performed with a terminal device, a transmission right management device control method for managing the transmission right, wherein communication from the transmission terminal device to the plurality of reception terminal devices is interrupted And a step of granting the transmission right to one terminal device selected from the plurality of receiving terminal devices when the communication interruption is detected.

  According to the above configuration or method, for example, when communication from the transmission terminal device to the reception terminal device is interrupted due to the transmission terminal device being out of communication range or being out of battery, the transmission right is transmitted. The management device detects the interruption of the communication and gives a transmission right to the other terminal devices.

  As a result, even if communication from the transmission terminal device to the reception terminal device is interrupted, there is a pair between the transmission terminal device to which the transmission right is newly given and another reception terminal device. Multi-communication can be continued.

  Therefore, when communication from the transmission terminal device is interrupted, a reconnection performed in order to acquire a transmission right from the transmission management device by the terminal device that becomes a new transmission terminal device, which was necessary in the past, has been performed. It becomes unnecessary. Therefore, it is possible to reduce the time from when communication with a transmission terminal device that has become out of communication range is interrupted until communication with a new transmission terminal device is resumed. As a result, users participating in the one-to-many communication can communicate comfortably.

  The transmission right management device according to the present invention further includes a communication connection state storage unit that stores identification information of a reception terminal device that is in communication with the transmission terminal device among the plurality of reception terminal devices. Further, it is preferable that the transmission right granting unit selects one of the identification information stored in the communication connection state storage unit, and grants the transmission right to the terminal device corresponding to the selected identification information.

  According to the above configuration, the transmission right granting unit is configured to receive the next transmission right from the identification information of the receiving terminal device in the connection state stored in the communication connection state storage unit. Select identification information.

  Accordingly, the transmission right granting unit can grant the transmission right to the receiving terminal device in the connected state.

  Therefore, it is possible to reduce the time from when communication with a transmission terminal device that has become out of communication range is interrupted until communication with a new transmission terminal device is resumed. As a result, users participating in the one-to-many communication can communicate comfortably.

  Further, the communication disconnection detection means in the transmission right management device of the present invention notifies the plurality of reception terminal devices that the communication interruption has been detected, and the transmission right granting means, as a response to the notification, It is preferable that the transmission right is granted to a terminal device that has made a request for acquisition of the transmission right.

  According to the above configuration, the transmission right management device notifies the receiving terminal device when communication from the transmitting terminal device to the receiving terminal device is interrupted, as a response to the notification that communication has been interrupted. When a transmission right acquisition request is received from the reception terminal device, the transmission right is granted to the reception terminal device.

  As a result, when communication from the transmitting terminal device to the receiving terminal device is interrupted, the user of the receiving terminal device can make a request for acquisition of the transmission right, and the transmission right can be determined by the request. It becomes possible to acquire.

  Therefore, when communication from the transmitting terminal device to the receiving terminal device is interrupted, the user of the receiving terminal device who wants to acquire the transmission right can acquire the transmission right, so that the user can communicate comfortably. It can be performed.

  A one-to-many communication system according to the present invention includes a transmission right management device according to any one of claims 1 to 3 and one transmission terminal having the transmission right granted by the transmission right management device. And a plurality of receiving terminal devices that receive data transmitted from the transmitting terminal device.

  According to the above configuration, when the communication from the transmission terminal device to the reception terminal device is interrupted due to, for example, the transmission terminal device being out of communication range or running out of battery, the transmission right management device Detects the interruption of the communication and grants a transmission right to other terminal devices.

  As a result, even if communication from the transmission terminal device to the reception terminal device is interrupted, there is a pair between the transmission terminal device to which the transmission right is newly given and another reception terminal device. Multi-communication can be continued.

  Therefore, when communication from the transmission terminal device is interrupted, a reconnection performed in order to acquire a transmission right from the transmission management device by the terminal device that becomes a new transmission terminal device, which was necessary in the past, has been performed. It becomes unnecessary. Therefore, it is possible to reduce the time from when communication with a transmission terminal device that has become out of communication range is interrupted until communication with a new transmission terminal device is resumed. As a result, users participating in the one-to-many communication can communicate comfortably.

  The transmission right management device may be realized by a computer. In this case, a control program for causing the transmission right management device to be realized by the computer by operating the computer as each of the above-described means, and recording the program Such computer-readable recording media also fall within the scope of the present invention.

  As described above, the transmission right management device of the present invention includes the communication disconnection detection unit that detects that communication from the transmission terminal device to the plurality of reception terminal devices has been interrupted, and the communication disconnection detection unit. When communication interruption is detected, a transmission right granting unit for granting the transmission right to one terminal device selected from the plurality of receiving terminal devices is provided.

  Further, the control method of the transmission right management device of the present invention includes a step of detecting that communication from the transmitting terminal device to the plurality of receiving terminal devices is interrupted, and detecting the communication interruption, Granting the transmission right to one terminal device selected from the receiving terminal device.

  Therefore, even if communication from the transmission terminal device is interrupted, the entire one-to-many communication system can be continuously communicated.

  An embodiment of the present invention will be described with reference to FIGS. 1 to 6 as follows.

  In the present embodiment, a description will be given of a push-to-talk over cellular (PoC) communication system using a mobile phone as a terminal device of the present invention and a PoC server as a server device. However, the present invention is not limited to this and participates. The present invention can be widely applied to an electronic conference system in which a person speaks after acquiring the right to speak.

  FIG. 2 is a diagram showing a schematic configuration of the PoC communication system 50 according to the present embodiment.

  The PoC communication system of the present embodiment is composed of a plurality of mobile phones and a PoC server, and has one right (hereinafter referred to as “sending right”) (transmission right) that can transmit voice data or the like issued by the user. The voice data transmitted from the (transmission terminal device) is established by a plurality of mobile phones (reception terminal devices) that do not have the right to transmit via the PoC server.

  The PoC communication system (one-to-many communication system) 50 according to the present embodiment includes a PoC server 51, a plurality of mobile phones 52, packet line networks 53 and 54, and base stations 55 and 56.

  The PoC server (transmission right management device) 51 controls PTT (Push-to-Talk) calls performed between a plurality of mobile phones 52... And manages transmission rights. The internal configuration will be described later.

  The mobile phone 52 is a communication terminal device operated by a user participating in a PTT call, and includes a plurality of mobile phones a to d. A specific internal configuration of the mobile phone 52 will be described later.

  The packet line networks 53 and 54 are networks connected by the Internet or the like, and are line networks that communicate packetized data and the like.

  The base stations 55 and 56 are provided for each area of a predetermined size and wirelessly connect the mobile phone 52 and the PoC server 51. In addition, the base stations 55 and 56 are in a state where the electric field strength and error rate, which are indicators of the reception quality of the mobile phone 52, are deteriorated, that is, the electric field strength and error rate are equal to or higher than a threshold value for a certain period of time. If the process continues, the PoC server 51 is notified to that effect (communication status failure notification).

  Here, the overall operation of the PoC communication system 50 will be briefly described as follows. Here, it is assumed that the user of the mobile phone a has pressed a button (PTT button) to be pressed when speaking in a PTT call.

  First, when the PTT button is pressed by the user of the mobile phone a, the mobile phone a sends a request for starting a PTT call (PTT call start request) to the PoC server 51 via the base station 55 and the packet network 53. Do. Upon receiving the PTT call start request, the PoC server 51 transmits a participation request notification requesting participation in the PTT call to the mobile phones b to d designated by the mobile phone a, and the mobile phone a has a transmission right. Give. Then, the mobile phone a having the transmission right passes through the base stations 55 and 56, the packet network 53 and 54, and the PoC server 51 to the mobile phone according to the participation request among the mobile phones b to d. By transmitting voice data, a PTT call, that is, PoC communication is established.

  Here, it is assumed that the PTT call start request includes the PTT call IDs of the mobile phones b to d designated by the mobile phone a and the transmission right acquisition request.

  Note that the mobile phone having the right to transmit means a mobile phone capable of transmitting data.

(PoC server configuration)
Next, the configuration of the PoC server 51 will be described with reference to FIG. Here, it is assumed that the mobile phone a has a transmission right.

  FIG. 1 is a diagram showing a schematic configuration of a PoC server 51 according to the present embodiment.

  As shown in FIG. 1, the PoC server 51 includes an interface unit 1, a communication control unit 2, a connection state management unit 3, a storage unit 4, a communication status management unit (communication disconnection detection means) 5, a transmission A right processing unit (transmission right granting means) 6.

  The interface unit 1 is a connection part for communication with the mobile phone 52 performed via the base stations 55 and 56. The communication control unit 2 controls communication with the mobile phone 52 performed via the base stations 55 and 56.

  The connection state management unit 3 includes an authentication unit 7 and a participation request / response processing unit 8, whereby the participation status as to whether or not the mobile phones b to d designated at the time of the PTT call start request participate in the PTT call Manage the connection status by. The connection state management unit 3 also manages the connection state according to the communication state in accordance with an instruction from the communication state management unit 5.

  Specifically, the connection state management unit 3 writes the PTT call ID of the mobile phone participating in the PTT call in the connection state storage unit (communication connection state storage unit) 14. Further, when the communication status notification is received from the communication status management unit 5 and the connection status in the connection status storage unit 14 is changed, the connection status management unit 3 updates the contents of the connection status storage unit 14. It has become. For example, when the mobile phone c participating in the PTT call goes out of communication range, the communication status management unit 5 inputs that the communication with the mobile phone c has been interrupted. At this time, the connection state management unit 3 rewrites the connection state of the mobile phone c in the connection state storage unit 14 to x indicating the non-connection state. Further, the connection state management unit 3 may notify the other mobile phones a, b, and d in the connected state that the mobile phone c has been disconnected.

  Here, the PTT call ID refers to an identifier for PTT call assigned to identify each of the mobile phones a to d. Also, each mobile phone has a PTT call ID in advance.

  The participation request / response processing unit 8 performs processing related to the participation request / response of the mobile phone designated by the PTT call start request. Specifically, the participation request / response processing unit 8 transmits a participation request notification to the mobile phones b to d based on the PTT call IDs of the mobile phones b to d acquired when designated by the mobile phone a, If there is a participation response notification that is a response to the participation request notification, the participation response notification is received.

  In addition, when the authentication unit 7 receives the participation response notification from the designated mobile phone, the authentication unit 7 performs authentication depending on whether the mobile phone that has received the participation request notification matches the mobile phone that has received the participation response notification. Is what you do. Specifically, if there is a participation response notification from the mobile phone c among the mobile phones b to d designated by the mobile phone a, the PTT call ID of the mobile phone c that is the transmission source of the participation response notification, Authentication is performed depending on whether or not the PTT call ID of the mobile phone c acquired from the mobile phone a matches the designated PTT call ID.

  The storage unit 4 is a memory, a hard disk, or the like that stores programs, data, and the like necessary for executing various functions of the PoC server 51, and includes a transmission right information storage unit 13 and a connection state storage unit 14 therein. .

  The transmission right information storage unit 13 stores information (transmission right information) indicating which mobile phone currently has the right to transmit, and the stored transmission right information is the transmission right. It is written and updated by the setting unit 12 (FIG. 1), and is read by the transmission right granting unit 10 (FIG. 1) and the transmission right release determining unit 11 (FIG. 1). Further, the transmission right information storage unit 13 may store a history of past transmission right holders in time series, or may store a past transmission time of each right holder.

  Here, FIG. 4 is a diagram illustrating an example of a table stored in the connection state storage unit 14.

  The connection status storage unit 14 associates the PTT call ID of the mobile phone that has transmitted the participation response notification with the connection status according to the communication status of the stored mobile phone, and stores it in a table as shown in FIG. Storing.

  Specifically, first, the PTT call ID of the mobile phone that has transmitted the participation response notification among the mobile phones a to d designated at the start of the PTT call is stored. At this time, in the connection state column of the table shown in FIG. If the connection status is changed from the communication status management unit 5, the connection status column of the connection status storage unit 14 is updated according to the change.

  The communication status management unit 5 manages the communication connection status between the mobile phones a to d and the PoC server 51. For example, when the communication status failure notification of the mobile phone c is made from the base station 55, the communication status management unit 5 determines that the mobile phone c is out of the communication range, and notifies the connection status management unit 3 and the transmission right. The data is output to the transmission right release determination unit 11 of the processing unit 6.

  The transmittal right processing unit 6 includes a transmittal right managing unit 9 and a transmittal right granting unit 10, which allows the mobile phone to which the transmittal right currently belongs or the mobile phone having the transmittal right When it is necessary to change the (speaking right holder), the next step is to select the mobile phone to which the right to send is selected, and to give the right to the actually selected mobile phone. General speaking management. Moreover, you may provide the function to transmit the transmission right information, such as which user has the current transmission right, to each mobile phone ad.

  The transmission right management unit 9 includes a transmission right release determination unit 11 and a transmission right setting unit 12, so that when it is necessary to change the transmission right holder, which mobile phone is to be transmitted next. Set whether to grant the right to speak.

  The transmission right release determination unit 11 determines whether or not it is necessary to release the transmission right from the current transmission right holder. Specifically, whether the mobile phone that is determined to be out of range by the communication status management unit 5 and the mobile phone that is the current transmission right person stored in the transmission right information storage unit 13 are the same. If it is determined that they are the same, an instruction to release the transmission right from the current transmission right holder is output to the transmission right setting unit 12 and also to the transmission right granting unit 10 Output. On the other hand, if it is determined that they are not the same, nothing is output to the transmission right setting unit 12 and the transmission right granting unit 10, and the transmission right remains belonging to the current transmission right holder. Here, whether or not the mobile phone that is determined to be out of service area by the communication status management unit 5 and the mobile phone that is the current transmission right holder stored in the transmission right information storage unit 13 are the same. The PTT call ID is also used for this determination.

  When the transmission right setting unit 12 receives an instruction from the transmission right release determination unit 11 to release the transmission right from the current transmission right holder, the transmission right setting unit 12 receives from the connection state storage unit 14 the mobile phone currently in the connection state. One of the telephones is selected, the PTT call ID of the selected mobile phone is taken out, and this is stored in the transmission right information storage unit 13 as the PTT call ID of the new transmission right holder.

  The transmission right granting unit 10 actually grants a transmission right to one of the mobile phones a to d, and specifically receives an instruction from the transmission right release determination unit 11. The PTT call ID of the newly selected mobile phone is acquired from the call right information storage unit 13 updated by the call right setting unit 12, and the right to send is assigned to the mobile phone having the PTT call ID. To do.

(Configuration of mobile phone)
Next, the configuration of the mobile phone 52, that is, the mobile phones a to d will be described with reference to FIG. Since the configurations of the mobile phones a to d are the same, the configuration of the mobile phone a will be described in this embodiment, and the description of the configurations of the mobile phones b to d will be omitted.

  FIG. 3 is a diagram showing a schematic configuration of the mobile phone 52.

  The mobile phone a includes a communication unit 21, a main control unit 22, an operation unit 23, a voice input unit 24, a display unit 25, a camera unit 26, a storage unit 27, a voice output unit 28, and a recording unit. 29 and a time measuring unit 30.

  The communication unit 21 performs wireless communication with the base station 55 via the antenna 21a.

  The main control unit 22 controls execution of various applications such as a PTT call, and includes a participation response processing unit 31 and a transmission right processing unit 32. Further, the main control unit 22 performs control so that data can be transmitted only when the transmission right is granted. Details of the participation response processing unit 31 and the transmission right processing unit 32 will be described later.

  The operation unit 23 is a button or the like for a user to operate. The operation unit 23 includes a PTT button 23a that is pressed when the user speaks in a PTT call. A signal generated from the operation unit 23 when the PTT button 23a is operated is transmitted to the main control unit 22, and is transmitted from the main control unit 22 to the PoC server 51 as a PTT call start request.

  The voice input unit 24 is a microphone, and is used for voice input during transmission in a PTT call. The voice uttered by the user of the mobile phone a is taken into the mobile phone a as voice data via the voice input unit 24. In the present embodiment, voice information that is input from the voice input unit 24 while the user presses the PTT button 23a and is transmitted by the PTT call is referred to as call data.

  The display unit 25 includes, for example, a liquid crystal display (LCD), and displays an execution screen for various application functions provided in the mobile phone. For example, if the display unit 25 is executing the PTT call function, the user name (participant name) of other mobile phones participating in the PTT call in which the mobile phone is currently participating, each participant Presence (such as the status of the mobile phone such as “online”, “offline”, “with right to speak”, “no right to speak”).

  The camera unit 26 is an imaging unit that includes an imaging device such as a CCD (Charge Coupled Device), and is configured to image a subject in accordance with control from the main control unit 41.

  The storage unit 27 is a memory, a hard disk, or the like that stores programs, data, and the like necessary for executing various application functions of the mobile phone. The storage unit 27 stores, for example, data such as a mobile phone number, a mail address, and a PTT call ID, and also stores an application program for transmitting and receiving e-mails using the mobile phone. These programs and data are read by the main control unit 22 as necessary.

  The audio output unit 28 is a speaker or the like for outputting audio, and is used for various functions including PTT calls.

  The recording unit 29 causes the storage unit 27 to store voice or the like input to the mobile phone from the outside via the communication unit 21 or the voice input unit 24 as voice data. Thereby, for example, even when input voice or the like is not output from the audio output unit 28 in real time, the user can listen later by reproducing the audio data recorded by the recording unit 29.

  The timer unit 30 is a timer, and is used for counting, for example, a time limit for transmitting right as described later.

  The participation response processing unit 31 obtains a participation request notification transmitted from the PoC server 51 when another mobile phone that does not have a transmission right other than the mobile phone a issues a PTT call start request, and receives the participation request notification. When responding to the request, a participation response notification to participate in the PTT call is transmitted to the PoC server 51. When the participation response processing unit 31 obtains the participation request notification, for example, the display unit 25 displays that fact, and the user who sees the display includes a PTT call participation button (not shown) and the like. By pressing the button, a participation response notification may be transmitted. Further, the participation response processing unit 31 may be configured not to notify the PoC server 51 of anything when not participating in the PTT call, or provided with a PTT call participation rejection button or the like on the operation unit 23, The configuration may be such that, when is pressed, a participation refusal notification indicating that the user does not participate in the PTT call is transmitted.

  The transmission right processing unit 32 requests the PoC server 51 to acquire a transmission right in order to acquire the transmission right, and sends a request for releasing the transmission right (transmission right release request) to the PoC. This is performed for the server 51. Specifically, when the transmission right processing unit 32 does not have the transmission right, the transmission right processing unit 32 receives a notification from the PoC server 51 that the connection of the mobile phone having the transmission right is disconnected (disconnected). In order to acquire the transmission right, a request for acquiring the transmission right is made to the PoC server 51. In addition, in the case where the user has the right to speak, when the right to transfer is desired to be transferred to another participant, a request for releasing the right to speak (transmission right release request) is sent to the PoC server 51. For example, the transmission right processing unit 32 may transmit a transmission right release request to the PoC server 51 when detecting that the pressing of the PTT button 23a that has been continuously pressed during a call is released. Good. In addition, the transmission right processing unit 32 displays information on the right of transmission right having the current transmission right, such as a PTT call ID, in order to indicate on the display unit 25 which user has the current transmission right. A function of acquiring from the server 51 may be provided.

  Here, the transmission right release request means that the right to be released is notified and the release of the transmission right is requested, and the mobile phone whose transmission right has been released is the main control unit. Since transmission of data is controlled by 22, it becomes impossible to transmit data. In addition, the request to release the right to speak is not only for intentionally abandoning the right to speak, but also when the mobile phone with the right to speak is turned off when the battery runs out, or when the power is intentionally turned off. Is also emitted.

  In addition, the mobile phone a can use various applications such as a normal telephone, electronic mail, and the Internet in addition to a PoC communication function such as a PTT call using wireless communication. Therefore, the present invention is not limited to the above-described units and functions, and may have various other functions. For example, the configuration may include a GPS (Global Positioning System) for detecting the current position, a TV antenna for realizing a TV broadcast receiving function, and a tuner.

  In addition, the mobile phone a having the transmission right receives the image data captured by the camera unit 26 and the character data input by the operation unit 23 in place of the call data of the present embodiment. It is also possible to send to d.

(Description of operation of PoC server)
Next, the operation of the PoC server 51 will be described with reference to FIG.

  FIG. 5 is a flowchart showing an example of the operation of the PoC server 51.

  First, when a certain mobile phone makes a PTT call start request to the PoC server 51 (S1), the communication control unit 2 of the PoC server 51 receives the PTT call start request via the interface unit 1. .

  The communication control unit 2 includes a PTT call of another mobile phone (hereinafter referred to as a receiving mobile phone) designated by the mobile phone (hereinafter referred to as a transmitting mobile phone) which has been included in the PTT call start request. While outputting the ID to the participation request / response processing unit 8, the transmission right acquisition request is output to the transmission right release determination unit 11.

  The participation request / response processing unit 8 transmits a participation request notification to each of the reception mobile phones based on the input PTT call ID of the reception mobile phone (S2), and connects the PTT call ID to the connection state. The data is output to the storage unit 14.

  When the participation request / response processing unit 8 acquires the participation response notification transmitted from the reception mobile phone in response to the participation request notification (YES in S3), the reception mobile phone that is the transmission source of the participation response notification The PTT call ID is output to the authentication unit 7.

  The authentication unit 7 acquires the PTT call ID stored in the connection state storage unit 14 at the time of S2 from the connection state storage unit 14, and the participation response notification input at the time of YES of the PTT call ID and S3 Is compared with the PTT call ID of the receiving mobile phone that is the source of the message, and it is determined whether or not they match. If the authentication unit 7 determines that the PTT call ID stored in the connection state storage unit 14 at S2 matches the PTT call ID that is the transmission source of the participation response notification, these are the same. It authenticates that it is a thing (YES of S4).

  When the PTT call ID that is the transmission source of the participation response notification is authenticated to be the same as the PTT call ID stored in the connection state storage unit 14 in S4 YES, the authentication unit 7 determines that the connection state storage unit 14 The connection state of the PTT call ID stored in is stored as the connection state. For example, the authentication unit 7 writes a circle in the connection status column of the table shown in FIG.

  Further, the PoC server 51 is not connected to the receiving mobile phone for which no participation response notification has been made (NO in S3), and the PTT call between the receiving mobile phone and the transmitting mobile phone is not established (S15). .

  Further, the authentication unit 7 does not perform authentication because it has determined that the PTT call ID stored in the connection state storage unit 14 at S2 does not match the PTT call ID that is the source of the participation response notification. (S15: NO), the PTT call between the unauthenticated mobile phone for reception and the mobile phone for transmission is not established (S15).

  On the other hand, the transmission right release determination unit 11 to which the transmission right acquisition request has been inputted does not determine whether or not to release the transmission right because the transmission right does not belong anywhere at this time. A request to acquire a right to speak is output to the transmission right setting unit 12, and an instruction to grant a right to speak is output to the transmission right giving unit 10. When the transmission right acquisition request is input, the transmission right setting unit 12 sets the mobile phone that is the transmission source of the transmission right acquisition request as the transmission right holder, and uses the PTT call ID of the mobile phone as the transmission right information. It outputs to the memory | storage part 13 and memorize | stores it.

  Upon receiving the instruction to grant the transmission right, the transmission right granting unit 10 obtains the PTT call ID of the right holder from the transmission right information storage unit 13 and stored by the transmission right setting unit 12, and based on that. Then, the right to send is granted to the mobile phone that has made the PTT call start request (S5).

  Then, the PTT call is started between the mobile phone (S5) that has issued the PTT call start request to which the transmission right is granted and the reception mobile phone that is stored in the connection state storage unit 14 as the connection state ( S6) The PTT call state in which the mobile phone that has made the PTT call start request is the right to transmit continues (S7).

  Here, the communication status management unit 5 of the PoC server 51 notifies the base station 55 or 56 that the communication status of a certain mobile phone is bad and the PTT of the mobile phone whose communication status is bad. When the call ID is acquired (YES in S8), the communication status management unit 5 determines that communication with the mobile phone has been disconnected. Then, the communication status management unit 5 outputs to the connection status management unit 3 the fact that the communication of the mobile phone has been disconnected and the PTT call ID of the mobile phone that has been disconnected, and the transmission right release determination unit 11. Also output.

  The connection state management unit 3 updates the connection state of the mobile phone having the PTT call ID input from the communication state management unit 5 in the connection state storage unit 14 to a non-connection state. For example, the authentication unit 7 rewrites “◯” written in the connection state column of the table shown in FIG.

  On the other hand, the transmission right release determination unit 11 compares the PTT call ID input from the communication status management unit 5 with the PTT call ID of the current transmission right person acquired from the transmission right information storage unit 13. Do. When the transmission right release determination unit 11 determines that the PTT call ID input from the communication status management unit 5 matches the PTT call ID of the current transmission right person acquired from the transmission right information storage unit 13. Then, it decides to release the right to speak from the mobile phone that is the current right holder, and outputs a notification to the effect that the right to speak is released to the right setting unit 12 and the right grant unit 10 ( S9).

  Further, the transmission right release determination unit 11 does not match the PTT call ID input from the communication status management unit 5 with the current transmission right holder's PTT call ID acquired from the transmission right information storage unit 13. If it is determined that the transmission right release determination unit 11 determines not to release the transmission right from the mobile phone that is the current transmission right holder, the transmission right setting unit 12 and the transmission right granting unit 10 do nothing. Do not instruct.

  When the transmission right setting unit 12 receives a notification to release the transmission right from the transmission right release determination unit 11 (S9), the transmission right setting unit 12 selects one mobile phone that is currently connected from the connection state storage unit 14. (YES in S10), the PTT call ID of the mobile phone is acquired and output to the transmission right information storage unit 13 as a new transmission right holder.

  Upon receiving the notification of releasing the transmission right from the transmission right release determination unit 11, the transmission right grant unit 10 sends a new transmission right from the transmission right information storage unit 13 updated by the transmission right setting unit 12. The PTT call ID of the mobile phone selected as the right holder is acquired. Then, the transmission right grant unit 10 grants the transmission right to the mobile phone having the PTT call ID based on the acquired PTT call ID (YES in S10).

  By the way, in S10, the transmission right setting unit 12 appropriately selects one of the participating mobile phones, and the transmission right information in the transmission right information storage unit 13 is newly selected. Although the case where information is overwritten has been described, the present invention is not limited to this, and may be selected by the following methods (1) to (3), for example.

  (1) The PoC server 51 includes a timer. The timer counts the time from when the transmission right information storage unit 13 is updated to when the PoC server 51 is updated, and transmits the counted time during that time. When the storage unit 4 is configured to store the transmission time of the mobile phone having the right to speak, the transmission right setting unit 12 looks at the history of the transmission time and determines the transmission time. Select the longest mobile phone.

  (2) In the case where the PoC server 51 stores the PTT call ID of the previous right holder in the storage unit 4 as the right holder history information, the transmission right setting unit 12 The mobile phone that has the right to transmit the speech in the history of the right to transfer history is selected.

  (3) As long as the PoC server 51 has previously specified a mobile phone to which the right to transmit is always given, and the right to set transmission unit 12 is in the connected state, the mobile phone always Select.

  The mobile phone (new transmission right holder) to which the transmission right is newly granted in S10 YES can acquire the transmission right (S11) and can transmit voice data and the like. Then, the PTT call is continued between the new transmission right holder and another mobile phone (S12).

  If there is a PTT call disconnect request from any of the mobile phones participating in the PTT call (YES in S13), the PTT call ends (S14). If there is no PTT call disconnect request from any mobile phone (NO in S13), the PTT call is continued (S12).

  Further, in S8, the PoC server 51 does not acquire the communication status failure notification from the base station 55 or 56 (NO in S8), and transmits the speech from the mobile phone that has made the PTT call start request as the transmission right holder. When the request for releasing the transmission right to abandon the right is acquired (YES in S16), the request for releasing the transmission right is input to the transmission right release determination unit 11.

  The transmission right release determination unit 11 releases the transmission right from the mobile phone that has made the PTT call start request as the transmission right holder, and issues an instruction to release the transmission right to the transmission right setting unit 12 and the transmission right. Output to the assigning unit 10. The rest is the same operation as S9 to S14.

  On the other hand, if the transmission right release request is not received from the mobile phone that has made the PTT call start request, which is the transmission right holder in S16 (NO in S16), the transmission right holder of the mobile phone that has made the PTT call start request The PTT call is continued (S7).

  Further, the transmission right setting unit 12 does not acquire the PTT call ID of the mobile phone selected as the new transmission right holder from the transmission right information storage unit 13 (NO in S10), and determines the transmission right release determination. When the section 11 transmits a notification to the effect that the right to speak has been released due to the disconnection of the right-of-speaker communication to a mobile phone other than the mobile phone that was the right to speak (S17) It becomes as follows.

  If any of the mobile phones that have received the notification that the transmission right has been released from the transmission right release determination unit 11 makes a request to acquire the transmission right to the PoC server 51 (YES in S18), the transmission right is granted. The unit 10 grants the transmission right to the mobile phone that has made the transmission right acquisition request (S11).

  At this time, if there is a transmission right acquisition request from a plurality of mobile phones, it is given to the mobile phone that has made the transmission right acquisition request first.

  If none of the mobile phones that have received the notification that the transmission right has been released make a request for acquisition of the transmission right to the PoC server 51 (NO in S18), the PTT call ends (S14).

  Next, the operation of the PoC server 51 when the mobile phone that has made the PTT call start request is the mobile phone a will be specifically described.

  First, if the mobile phone a transmits a PTT call start request, the PTT call start request is input to the communication control unit 2 of the PoC server 51 via the interface unit 1 (S1). Here, it is assumed that the PTT call start request includes the PTT call IDs of the mobile phones b to d designated by the mobile phone a and the transmission right acquisition request.

  The communication control unit 2 outputs the PTT call IDs of the designated mobile phones b to d to the participation request / response processing unit 8 of the connection state processing unit 3 and sends a transmission right acquisition request to the transmission right processing unit. 6 to the transmission right release determination unit 11.

  The participation request / response processing unit 8 transmits a participation request notification to each of the mobile phones b to d based on the designated PTT call IDs of the mobile phones b to d (S2).

  Then, when the participation request / response processing unit 8 acquires the participation response notification from the mobile phones b and c among the mobile phones b to d through the communication control unit 2 (S3), the participation request / response processing unit 8 is the transmission source of the participation response notification. The PTT call ID of a certain mobile phone b, c is output to the authentication unit 7.

  The authentication unit 7 includes the PTT call IDs of the mobile phones b and c that are the transmission source of the participation response notification, and the PTT call IDs of the mobile phones b and c stored in the connection state storage unit 14 at S2, that is, the mobile phone The PTT call IDs of the mobile phones b and c designated by a are collated, and if both match, authentication is performed (S4). If the authentication unit 7 authenticates that the two match, it is assumed that the mobile phones b and c are participating in the PTT call, and the PTT call IDs of the mobile phones b and c are set as shown in the table of FIG. The data is output to and stored in the connection state storage unit 14.

  In addition, the PTT call is not established between the mobile phone d and the mobile phone a that have not been notified of the participation response (S15), and the PTT call ID of the mobile phone d is not stored in the connection state storage unit 14. Then, the PTT call between the mobile phone d and the mobile phone a does not start until the PoC server 51 receives the participation response notification from the mobile phone d.

  Also, for example, in S4, the PTT call ID of the mobile phone c that is the transmission source of the participation response notification and the PTT call ID of the mobile phone c stored in S2 in the connection state storage unit 14 are not matched and authenticated. If not, the PTT call between the mobile phone c and the mobile phone a is not established (S15).

  On the other hand, the transmission right release determination unit 11 to which the transmission right acquisition request is input does not determine whether or not to release the transmission right because the transmission right does not belong anywhere at this time. A transmission right acquisition request is output to the transmission right setting unit 12 and a transmission right granting instruction is output to the transmission right granting unit 10. When the transmission right acquisition request is input, the transmission right setting unit 12 outputs the PTT call ID of the mobile phone that is the transmission source of the transmission right acquisition request to the transmission right information storage unit 13 as the transmission right holder. And memorize it.

  Upon receiving an instruction from the transmission right release determination unit 11, the transmission right grant unit 10 reads the PTT call ID of the mobile phone a set as the right to transmit from the transmission right information storage unit 13, and the PTT Based on the call ID, the transmission right is actually granted to the mobile phone a. As a result, the PTT call is started between the mobile phones a to c (S6).

  When the PTT call is started (S6), the voice uttered by the user of the mobile phone a who is the right of transmission is used as the call data via the PoC server 51 and the mobile phones b and c participating in the PTT call. Sent to. Thereby, the users of the mobile phones b and c can hear the voice of the user of the mobile phone a, and the PTT call state is established (S7).

  Here, a case where the PoC server 51 receives a communication status failure notification from the base station 55 or 56 in the PTT call state (S7) will be described (YES in S8).

  When the PoC server 51 receives the communication status failure notification from the base station 55, the PoC server 51 causes the communication status management unit 5 to input the communication status failure notification via the communication control unit 2.

  For example, if the communication status management unit 5 receives a communication status failure notification indicating that the mobile phone a is in a poor communication status from the base station 55, the communication status management unit 5 determines that the mobile phone a is out of service area, and the mobile phone a And the PTT call ID are output to the connection state management unit 3 and to the transmission right release determination unit 11 (S8).

  When the connection state management unit 3 receives information that the mobile phone a is out of service area, the connection state management unit 3 updates the connection state of the connection state storage unit 14. Specifically, the connection state management unit 3 changes the connection state of the mobile phone a from ○ indicating the connection state to × indicating the non-connection state in the table shown in FIG. 4 stored in the connection state storage unit 14. Overwrite.

  When the transmission right release determination unit 11 receives the notification that the mobile phone a is out of service area and the PTT call ID of the mobile phone a from the communication status management unit 5, the transmission right release determination unit 11 receives the current transmission from the transmission right information storage unit 13. The PTT call ID of the right mobile phone a is acquired, and it is determined whether or not it is the same as the PTT call ID of the mobile phone a determined to be out of service area. Here, since the PTT call ID of the mobile phone a that is the current right holder and the PTT call ID of the mobile phone a that is determined to be out of service range are the same on the mobile phone a, the right to release the call is determined. The unit 11 decides to release the transmission right from the mobile phone a, and outputs a transmission right release instruction to the transmission right setting unit 12 (S9) and also outputs it to the transmission right granting unit 10. .

  On the other hand, for example, if a notification that the mobile phone b is out of service is received from the communication status management unit 5, the transmission right release determination unit 11 is the current transmission right holder acquired from the transmission right information storage unit 13. Since the PTT call ID of a certain mobile phone a and the PTT call ID of a mobile phone b are different, it is determined that it is not necessary to release the transmission right from the mobile phone a that is the current transmission right holder. Therefore, the transmission right release determination unit 11 does not instruct the transmission right setting unit 12 and the transmission right granting unit 10. In this case, the communication status management unit 5 only notifies the connection status management unit 3 that the mobile phone b is in a non-participating state.

  In response to the instruction to release the transmission right from the transmission right release determination unit 11, the transmission right setting unit 12 selects the mobile phone currently participating in the PTT call from the connection state storage unit 14, that is, the mobile phone b or c. The information of the selected mobile phone is acquired (S10). Here, it is assumed that the transmission right setting unit 12 selects the mobile phone b. The transmission right setting unit 12 that has acquired the information of the mobile phone b stores the information of the mobile phone b on the information of the mobile phone a that is the current transmission right person stored in the transmission right information storage unit 13. Overwrite information.

  Further, upon receiving the instruction to release the transmission right from the transmission right release determination unit 11, the transmission right grant unit 10 receives a new transmission updated by the transmission right setting unit 12 from the transmission right information storage unit 13. The right holder's PTT call ID, that is, the PTT call ID of the mobile phone b is acquired, and the transmission right is actually granted to the mobile phone b based on the PTT call ID (S10).

  Then, the cellular phone b obtains the transmission right from the PoC server 51 via the base station 55 (S11), and the voice uttered by the user of the cellular phone b who is the right of transmission is used as the call data as PoC. The message is transmitted to the mobile phone c participating in the PTT call via the server 51. Thereby, since the user of the mobile phone c can hear the voice of the user of the mobile phone b, the PTT call is continued with the right-of-send person in the state of the mobile phone b (S12).

  Here, if there is a PTT call disconnection request for disconnecting the PTT call from the mobile phone c (S13), the communication control unit 2 notifies the participating mobile phone b to that effect, The PTT call is disconnected. As a result, the PTT call between the mobile phone b and the mobile phone c is terminated (S14). The PTT call disconnect request can be made from any mobile phone that is participating in the PTT call.

  If there is no PTT call disconnect request from any of the participating mobile phones, the operations from S1 to S13 are repeated.

  In S8, the case where the communication status failure notification of the mobile phone a is received has been described. However, in S8, the mobile phone a itself does not receive the communication status failure notification of the mobile phone a from the base station 55 (NO in S8). Transmits a transmission right release request to the PoC server 51 (YES in S16), the transmission right release request is input to the transmission right release determination unit 11 via the communication control unit 2. In response to the request to release the transmission right, the transmission right release determination unit 11 releases the transmission right from the mobile phone a, and sends an instruction to change the transmission right person to the transmission right setting unit 12 and the transmission right granting unit 10. Output to. The rest is the same operation as S10 to S14.

  Further, when the request for releasing the transmission right is not received from the mobile phone a in S16 (NO in S16), the PTT call in which the right of transmission is the mobile phone a is continued.

  In YES in S10, the transmission right setting unit 12 has selected one next right transmission person from the mobile phone in the connection state storage unit 14 in the connected state. The setting unit 12 may not automatically select the next user (NO in S10). In the case of NO in S10, a notification that the transmission right is released from the mobile phone a (S9) is notified to the mobile phones b and c in other connected states by the transmission right release determination unit 11 (S17), In response to this, if a request that the mobile phone b wants to acquire the transmission right (transmission right acquisition request) is transmitted to the PoC server 51 (YES in S18), the transmission right release determination unit that has received the transmission right acquisition request 11 outputs an instruction to the mobile phone b to give the transmission right to the transmission right setting unit 12 and the transmission right giving unit 10. On the other hand, if no mobile phone makes a request to acquire a transmission right in the notification of S17 (NO in S18), the PTT call may be terminated (S14).

(Description of mobile phone operation)
Next, the operation of the mobile phone in this embodiment will be described with reference to FIG.

  FIG. 6 is a flowchart showing the operation of the mobile phone that does not make a PTT start request.

  First, a mobile phone starts a PTT call by transmitting a PTT call ID of a mobile phone specified as a destination of a PTT call stored in the storage unit 27 to the PoC server 51 together with a transmission right acquisition request. Make a request.

  Then, the PoC server 51 grants a transmission right to the mobile phone (transmitting-side mobile phone) that has made the PTT call start request.

  On the other hand, the mobile phone (receiver-side mobile phone) designated as the other party of the transmitting-side mobile phone acquires the participation request notification from the PoC server 51 via the antenna 21a and the communication unit 21 (S30). Request notification is input to the participation response processing unit 31.

  When the participation response processing unit 31 of the receiving-side mobile phone displays on the display unit 25 that the participation request notification has been received and detects that the user of the mobile phone has pressed the PTT call participation button or the like, the participation response notification is sent. It transmits to the PoC server 51 (YES in S31).

  As a result, the PTT call is started between the transmitting-side mobile phone and the receiving-side mobile phone (S32), and the receiving-side mobile phone enters a PTT receiving state in which voice data transmitted from the transmitting-side mobile phone is received. (S33).

  If the receiving mobile phone does not respond to the participation request notification in S31 (NO in S31), the PTT call between the receiving mobile phone and the transmitting mobile phone is not established (S43).

  Next, when the receiving mobile phone is in the PTT receiving state (S33), when the transmitting right is released from the transmitting mobile phone because the transmitting mobile phone is out of the communication range (YES in S34). If the PoC server 51 automatically selects a receiving mobile phone to which a new transmission right is to be granted (YES in S35), the transmission right is granted (S36).

  Since the mobile phone to which the transmission right is granted can transmit data by the control unit 22, the mobile phone transmits voice data or the like to another receiving-side mobile phone, and the PTT transmission state is set. (S37).

  If the mobile phone to which the transmission right in the PTT transmission state is granted transmits a transmission right release request for abandoning the transmission right from the transmission right processing unit 32 to the PoC server 51 (S38). (YES) Since the transmission right is released from the mobile phone, the mobile phone enters the PTT reception state on the data receiving side (S33).

  In addition, if the mobile phone to which the transmission right in the PTT transmission state is granted does not make a transmission right release request (NO in S38), the PTT transmission state is continued, but the PTT transmission state is joined. If there is a PTT call disconnect request from any of the mobile phones (YES in S39), the PTT call is terminated (S40), and if there is no PTT call disconnect request (NO in S39), the PTT transmission state is continued. (S37).

  In S35, the receiving mobile phone is not selected by the PoC server 51 as a mobile phone to which a new transmission right is granted (NO in S35), and the transmission right processing unit 32 is also selected by the PoC server 51. When receiving a notification that the transmission right has been released from the transmitting mobile phone (S41), the transmission right processing unit 32 may transmit a transmission right acquisition request to the PoC server 51 (S42). YES) In this case, the receiving-side mobile phone acquires the transmission right from the PoC server 51 (S36), and performs the same operations as S37 to S40.

  On the other hand, even if the transmission right processing unit 32 receives a notification from the PoC server 51 that the transmission right has been released from the transmitting mobile phone (S41), the transmission right acquisition request is not transmitted to the PoC server 51. If (NO in S42), the PTT reception state remains (S33).

  According to the above configuration, even if the connection between the transmission right holder and the PoC server 51 is cut off due to the disconnection of the communication due to the movement of the right transmission right person outside the communication range, the PoC server 51 automatically Then, one mobile phone to be the next transmission right holder can be selected from the mobile phones in the participating state at that time, and the right to transmit can be given to the selected mobile phone. Therefore, even if the transmission right holder goes out of service area, the entire PTT call will not be disconnected. Therefore, the PTT call can be made without specifying the other party of the PTT call or requesting to start the PTT call again. You can resume.

  Therefore, it is possible to shorten the time from the time when the right-of-speaker is out of service to the resumption of the PTT call with the next right-of-speaker, and the user of the PTT call can make a comfortable call.

  Further, in this embodiment, when the communication status management unit 5 determines that the mobile phone a having the current transmission right is out of service area, the transmission right processing unit 6 automatically selects a new transmission right holder. However, although the configuration to be given has been described, the present invention is not limited to such a configuration. For example, when the communication status management unit 5 determines that the mobile phone a having the right to transmit is out of service, the PoC server 51 sends the mobile phone a having the right to transmit to the participating mobile phones b to d. If there is a mobile phone that has made a request to acquire a transmission right based on the notification that the mobile phone is out of service area, the mobile phone may be granted a transmission right.

  As a result, even when the communication from the mobile phone a having the transmission right is disconnected, the user of the mobile phone who wants to acquire the transmission right can acquire the transmission right. Can communicate comfortably.

  Further, the PoC server 51 in the present embodiment uses the PTT call ID to control the transmission right management and data transmission / reception, but the transmission right management apparatus according to the present invention is not limited to this. The transmission right management and data transmission / reception may be controlled by other methods.

  In addition, the PoC server 51 in the present embodiment not only manages the transmission right between the mobile phone a having the transmission right and the other mobile phones b to d, but also the mobile phone a and the other mobile phone b. However, the transmission right management device according to the present invention is not limited to this, and may be a configuration that only manages the transmission right.

  In the present embodiment, the case where the one-to-many communication is a PTT call is described. However, the one-to-many communication system of the present invention is not limited to this, and has a transmission right instead of a transmission right. It may be a one-to-many communication system in which only the mobile phone that has been used can transmit image data.

  Note that the transmission right management device according to the present invention is not limited to the configuration of the PoC server 51 according to the present embodiment, but is based on the time measuring unit that measures the PTT call time and the time measured by the time measuring unit. It may be configured to include a billing unit that calculates a fee and the like.

  According to the above configuration, when the user wants to know the call charge for the PTT call, the call charge information can be obtained by making an inquiry to the PoC server.

  Further, the transmission right management device according to the present invention registers the mobile phone designated at the time of the PTT call start request as a group, or updates the group information when the mobile phone constituting the group is changed. The configuration may include a group information management unit, a group information storage unit that stores the group information, and the like.

  According to the above configuration, once a plurality of mobile phones are designated and a PTT call is made, the next time a call is made by the same member, it is possible to easily make a PTT call simply by designating the registered group. It becomes possible.

  Further, the transmission right may be released when the user of the mobile phone a makes a request to release the transmission right to the PoC server 51, and the time limit of the transmission right is determined in advance. The time limit of the transmission right may be counted by, and the transmission right release request may be automatically issued when the time limit is exceeded.

  According to the above configuration, it is possible to prevent a situation in which the same user has the transmission right for a long time, so that the opportunity for other users participating in the PTT call to transmit increases.

  Further, the communication target of the one-to-many communication system according to the present invention may be voice data, image data, or character data as in the present embodiment.

  In this embodiment, a mobile phone that does not perform a participation response notification cannot participate in a PTT call in a disconnected state. However, the present invention is not limited to this, and does not participate without a participation response notification at the start of a PTT call. Even a mobile phone may be able to participate in a PTT call halfway. For example, a mobile phone that wants to join in the middle makes an inquiry to the PoC server 51 that the PTT call is continued. If the PTT call is continued, the participation request notification is sent again and the participation is notified. In response to the request notification, a participation response notification may be transmitted to the PoC server 51 to enable participation on the way.

  Finally, each block of the PoC server 51, in particular, the transmission right processing unit 6, the communication status management unit 5, and the connection status storage unit 14 may be configured by hardware logic or using a CPU as follows. It may be realized by software.

  That is, the PoC server 51 includes a CPU (central processing unit) that executes instructions of a control program that realizes each function, a ROM (read only memory) that stores the program, a RAM (random access memory) that expands the program, A storage device (recording medium) such as a memory for storing the program and various data is provided. An object of the present invention is to provide a recording medium in which a program code (execution format program, intermediate code program, source program) of a control program of the PoC server 51, which is software that realizes the functions described above, is recorded so as to be readable by a computer. This can also be achieved by supplying the PoC server 51 and reading and executing the program code recorded on the recording medium by the computer (or CPU or MPU).

  Examples of the recording medium include tapes such as magnetic tapes and cassette tapes, magnetic disks such as floppy (registered trademark) disks / hard disks, and disks including optical disks such as CD-ROM / MO / MD / DVD / CD-R. Card system such as IC card, IC card (including memory card) / optical card, or semiconductor memory system such as mask ROM / EPROM / EEPROM / flash ROM.

  Further, the PoC server 51 may be configured to be connectable to a communication network, and the program code may be supplied via the communication network. The communication network is not particularly limited. For example, the Internet, intranet, extranet, LAN, ISDN, VAN, CATV communication network, virtual private network, telephone line network, mobile communication network, satellite communication. A net or the like is available. Also, the transmission medium constituting the communication network is not particularly limited. For example, even in the case of wired such as IEEE 1394, USB, power line carrier, cable TV line, telephone line, ADSL line, etc., infrared rays such as IrDA and remote control, Bluetooth ( (Registered trademark), 802.11 wireless, HDR, mobile phone network, satellite line, terrestrial digital network, and the like can also be used. The present invention can also be realized in the form of a computer data signal embedded in a carrier wave in which the program code is embodied by electronic transmission.

  Note that the present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and can be obtained by appropriately combining technical means disclosed in different embodiments. Embodiments are also included in the technical scope of the present invention.

  The present invention can be applied to a one-to-many communication system. Specifically, it can be applied to a PTT call system or the like.

It is a functional block diagram which shows schematic structure of the server apparatus which concerns on embodiment of this invention. It is explanatory drawing which shows the network structure of the one-to-many communication system which concerns on embodiment of this invention. FIG. 3 is a functional block diagram illustrating a schematic configuration of hardware of a mobile phone configuring the network illustrated in FIG. 2. It is a figure which shows an example of the table stored inside the connection state memory | storage part shown in FIG. It is a flowchart figure which shows an example of operation | movement of the server apparatus shown in FIG. It is a flowchart figure which shows an example of operation | movement of the mobile telephone shown in FIG. It is a figure which shows schematic structure of the conventional one-to-many communication system. It is explanatory drawing which shows the structure of the conventional PTT telephone call system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Interface part 2 Communication control part 3 Connection state management part 4 Memory | storage part 5 Communication condition management part (communication disconnection detection means)
6 Transmission right processing section (transmission right granting means)
DESCRIPTION OF SYMBOLS 7 Authentication part 8 Participation request / response process part 9 Speaking right management part 10 Speaking right grant part 11 Speaking right release determination part 12 Speaking right setting part 13 Speaking right information storage part 14 Connection state storage part (communication connection) State storage means)
50 PoC communication system (one-to-many communication system)
51 PoC server (transmission right management device)
52 Cellular Phone (Transmission Terminal Device) (Reception Terminal Device)

Claims (7)

In one-to-many communication performed between one transmission terminal device having a transmission right that is a right to transmit data and a plurality of reception terminal devices that receive data transmitted from the transmission terminal device, A transmission right management device for managing the transmission right,
Communication disconnection detection means for detecting that communication from the transmission terminal device to the plurality of reception terminal devices has been interrupted;
And a transmission right granting unit for granting the transmission right to one terminal device selected from the plurality of reception terminal devices when the communication interruption is detected by the communication disconnection detection unit. Transmission right management device. Of the plurality of receiving terminal devices, further comprising a communication connection state storage means for storing identification information of a receiving terminal device in communication with the transmitting terminal device,
The transmission right granting unit selects one of the identification information stored in the communication connection state storage unit, and grants a transmission right to a terminal device corresponding to the selected identification information. The transmission right management device described in 1. The communication disconnection detecting means notifies the plurality of receiving terminal devices that the communication interruption has been detected,
The transmission right management apparatus according to claim 1, wherein the transmission right granting unit grants the transmission right to a terminal device that has requested acquisition of the transmission right as a response to the notification. The transmission right management device according to any one of claims 1 to 3, and one transmission terminal device having the transmission right granted by the transmission right management device;
A one-to-many communication system comprising: a plurality of reception terminal devices that receive data transmitted from the transmission terminal device. In one-to-many communication performed between one transmission terminal device having a transmission right that is a right to transmit data and a plurality of reception terminal devices that receive data transmitted from the transmission terminal device, A control method of a transmission right management device for managing the transmission right,
Detecting that communication from the transmitting terminal device to the plurality of receiving terminal devices is interrupted;
And a step of granting the transmission right to one terminal device selected from the plurality of reception terminal devices when the communication interruption is detected.   A control program for operating the transmission right management device according to any one of claims 1 to 3, wherein the control program causes a computer to function as each of the above-described means.   A computer-readable recording medium on which the control program according to claim 6 is recorded.

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