JP2008104114A - Communication controller, communication control method, communication control program, and communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform charging processing when voice packets are transmitted certainly from a communication terminal to a communication terminal as a communication partner. <P>SOLUTION: A communication controller related to the present invention is a communication controller which relays and controls half-duplex communication between a first communication terminal and a second communication terminal as a communication partner of the first communication terminal, and includes a voice packet receiver which receives voice packets from the first communication terminal through the half-duplex communication, and a charging processing unit which does not charge for communication from the first communication terminal to the second communication terminal before the voice packet receiver receives the voice packets from the first communication terminal and charges for the communication from the first communication terminal to the second communication terminal after the voice packet receiver receives the voice packets from the first communication terminal. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a communication control device, a communication control method, a communication control program, and a communication system. In particular, the present invention relates to a communication control device, a communication control method, a communication control program, and a communication system that relay and control half-duplex communication between a communication terminal and a communication terminal that is a communication partner of the communication terminal.

According to Patent Document 1, after voice data is output from an information guidance providing device, a PoC (Push to talk over Cellular) server executes billing processing and stops billing processing after a predetermined time has elapsed. An information guidance service system has been proposed.
JP 2006-17749 A

  However, in the invention described in Patent Document 1, the charging process is executed regardless of whether or not the voice data is normally transmitted from the information guidance providing apparatus to the user's communication terminal. That is, since the billing process is executed without confirming that the voice data transmitted by the information guidance providing device has reached the user's communication terminal, even if the voice data does not actually reach the user's communication terminal In some cases, billing processing for voice data is executed.

  Then, an object of this invention is to provide the communication control apparatus, the communication control method, communication control program, and communication system which can solve the said subject. This object is achieved by a combination of features described in the independent claims. The dependent claims define further advantageous specific examples of the present invention.

  In order to solve the above problems, in the first embodiment of the present invention, half-duplex communication between the first communication terminal and the second communication terminal that is the communication partner of the first communication terminal is relayed and controlled. A communication control apparatus, comprising: a voice packet receiving unit that receives voice packets from a first communication terminal by half-duplex communication; and a first communication before the voice packet receiving unit receives a voice packet from the first communication terminal. The charging process for the communication from the first communication terminal to the second communication terminal is performed after the voice packet receiving unit receives the voice packet from the first communication terminal without performing the charging process for the communication from the terminal to the second communication terminal. A billing processing unit.

  Further, when a transmission request for a voice packet from the first communication terminal to the second communication terminal is received, the first communication terminal is set to the transmission mode that is a mode for transmitting the voice packet, and the voice packet is received. A communication method setting control unit for setting the second communication terminal in a certain reception mode is further provided, and the voice packet receiving unit receives the voice packet from the first communication terminal set in the transmission mode by the communication method setting control unit, and is charged The processing unit communicates from the first communication terminal to the second communication terminal until the communication method setting control unit sets the mode of the first communication terminal to the transmission mode and sets the mode of the first communication terminal to the reception mode. Charging for communication from the first communication terminal to the second communication terminal after the voice packet receiving unit receives the voice packet from the first communication terminal Management and may be carried out.

  Further, each time the billing processing unit performs billing processing for communication from the first communication terminal to the second communication terminal in association with the first communication terminal identifier for identifying the first communication terminal, the first communication terminal A charging processing information storage unit for storing charging processing information indicating that charging should be performed, and charging processing information stored in the charging processing information storage unit every time a predetermined time elapses are charged to the first communication terminal. You may provide the accounting process information transmission part transmitted to the external accounting settlement apparatus which performs a settlement process.

  According to a second aspect of the present invention, there is provided a communication control method for relaying and controlling half-duplex communication between a first communication terminal and a second communication terminal that is a communication partner of the first communication terminal. The voice packet receiving stage for receiving voice packets from the first communication terminal by half-duplex communication, and before receiving the voice packets from the first communication terminal in the voice packet receiving stage, the first communication terminal to the second communication terminal A charging processing stage for performing charging processing for communication from the first communication terminal to the second communication terminal after the voice packet receiving unit receives the voice packet from the first communication terminal without performing charging processing for communication to .

  Moreover, in the 3rd form of this invention, communication for the communication control apparatus which relays and controls the half duplex communication between the 1st communication terminal and the 2nd communication terminal which is a communicating party of the 1st communication terminal A control program comprising: a voice control unit configured to receive a voice packet from a first communication terminal by means of half-duplex communication; before the voice packet reception unit receives a voice packet from the first communication terminal; Charging for communication from the first communication terminal to the second communication terminal is not performed, and after the voice packet receiving unit receives the voice packet from the first communication terminal, charging for the communication from the first communication terminal to the second communication terminal is performed. It functions as a billing processing unit that performs processing.

  Moreover, in the 4th form of this invention, the communication control apparatus which controls the half-duplex communication between the 1st communication terminal and the 2nd communication terminal which is a communicating party of a 1st communication terminal and a 1st communication terminal A first communication connection request unit that transmits a signal indicating a connection request for half-duplex communication to a second communication terminal that is a communication partner to a communication control device; When half-duplex communication between the first communication terminal and the second communication terminal is established by the connection request transmitted by the first communication connection request unit, the voice packet to the second communication terminal is transmitted to the communication control device. A first communication terminal side voice packet transmission unit, and the communication control device receives a voice packet from the first communication terminal side voice packet transmission unit by half duplex communication and a voice packet reception Part transmits voice packet on the first communication terminal side After receiving the voice packet from the first communication terminal side voice packet transmitter without receiving the voice packet from the first communication terminal and receiving the voice packet from the first communication terminal side voice packet transmitter, A billing processing unit that performs billing processing for communication from the first communication terminal to the second communication terminal.

  The above summary of the invention does not enumerate all the necessary features of the present invention, and sub-combinations of these feature groups can also be the invention.

  According to the present invention, it is possible to execute a charging process when a voice packet is transmitted from a communication terminal to a communication terminal of a communication partner.

  Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the claimed invention, and all combinations of features described in the embodiments are included. It is not necessarily essential for the solution of the invention.

  FIG. 1 shows an outline of the operation of the communication control apparatus 10 according to an embodiment of the present invention. The server system 30 includes a communication control device 10 and a billing settlement device 15. The plurality of communication terminals 20 and the server system 30 are connected via the network 40. Communication terminal 20 (A) communicates with communication partner communication terminal 20 (B) via network 40. The communication control apparatus 10 according to the present embodiment is intended to execute a charging process when a voice packet is transmitted from the communication terminal 20 (A) to the communication terminal 20 (B) of the communication partner.

  The communication control device 10 is information indicating that the half-duplex communication between the plurality of communication terminals 20 is relayed and controlled, and charging processing is performed for the voice packet transmitted by each of the plurality of communication terminals 20. Generate billing process information. Specifically, the communication control device 10 generates billing processing information for each predetermined number of voice packets transmitted by the communication terminal 20, for example, talk bursts. The communication control device 10 is, for example, a PoC server.

  The accounting clearing apparatus 15 receives from the communication control apparatus 10 a plurality of accounting processing information generated by the communication control apparatus 10 for each of a plurality of talk bursts transmitted from the communication terminal 20 (A) to the communication terminal 20 (B). Then, the billing settlement apparatus 15 analyzes the received plurality of billing processing information and performs billing processing for half-duplex communication from the communication terminal 20 (A) to the communication terminal 20 (B). Here, the communication control device 10 satisfies a predetermined condition (for example, when a predetermined number of talk bursts are transmitted or when a predetermined time elapses) for charging processing information. In this case, it is transmitted to the billing settlement apparatus 15. The billing settlement apparatus 15 is, for example, a Charging Control Function server (CCF) that performs billing settlement processing for IMS services.

  Communication terminal 20 is a mobile phone capable of half-duplex communication. The communication terminal 20 is, for example, a mobile phone that can perform communication using the Push-To-Talk (PTT) method. The communication terminal 20 may be a portable information terminal such as a PDA capable of half-duplex communication using the PTT method, a personal computer, or the like. The network 40 is, for example, the Internet, and may be another communication network such as a LAN or a WAN.

  For example, the communication terminal 20 (A) requests the communication control apparatus 10 via the network 40 to request a session establishment with the communication terminal 20 (B) as the communication partner. The communication control apparatus 10 receives a request from the communication terminal 20 (A) and establishes a session between the communication terminal 20 (A) and the communication terminal 20 (B). After the communication control apparatus 10 establishes a session, the communication terminal 20 (A) transmits / receives a talk burst to / from the communication terminal 20 (B) via the network 40.

  After a session is established between the communication terminal 20 (A) and the communication terminal 20 (B), the communication terminal 20 (A) can transmit voice data, that is, a talk burst to the communication terminal 20 (B). Consider the case where the right to speak is acquired. In such a case, the communication terminal 20 (A) can transmit voice data to the communication terminal 20 (B) (arrow 400). On the other hand, the communication terminal 20 (B) cannot transmit voice data while the communication terminal 20 (A) has the right to speak. After communication terminal 20 (A) releases the right to speak, communication terminal 20 (B) can transmit audio data to communication terminal 20 (A) when communication terminal 20 (B) acquires the right to speak ( Arrow 402).

  Here, consider a case where the communication terminal 20 (A) has the right to speak. In such a case, after the voice data transmitted from the communication terminal 20 (A) to the communication terminal 20 (B) reaches the communication control device 10, the voice data is transmitted to the communication terminal 20 (B) at a timing. The communication control device 10 performs a charging process for communication from the communication terminal 20 (A) to the communication terminal 20 (B). That is, the communication control apparatus 10 does not execute the billing process when the communication terminal 20 (A) acquires the right to speak, receives the audio data transmitted by the communication terminal 20 (A), and receives the received audio data. Is transmitted to the communication terminal 20 (B), and the communication control device 10 transmits the data, and then charges the communication from the communication terminal 20 (A) to the communication terminal 20 (B).

  According to the communication control apparatus 10 according to the present embodiment, the accounting process is executed at a timing at which the communication terminal 20 (B) can reliably receive the audio data transmitted by the communication terminal 20 (A). Although the voice data is transmitted from (A) to the communication terminal 20 (B), the billing process is not executed when the voice data cannot be received by the communication terminal 20 (B).

  FIG. 2 shows an example of a functional configuration of the communication control apparatus 10 according to the present embodiment. The communication control device 10 includes a response signal receiving unit 100, a connection request receiving unit 102, a transmission request receiving unit 104, a voice packet receiving unit 106, a communication establishment control unit 110, a communication method setting control unit 112, a billing processing unit 114, a call / A completion signal transmission unit 120, a communication establishment signal transmission unit 122, a communication method setting signal transmission unit 124, a voice packet transmission unit 126, a charging process information transmission unit 128, a terminal information storage unit 130, and a charging processing information storage unit 132 are provided.

  Here, the first communication terminal described in the claims is an example of the communication terminal 20 (A), and the second communication terminal described in the claims is an example of the communication terminal 20 (B). Further, the first communication terminal may be the communication terminal 20 (B), and the second communication terminal may be the communication terminal 20 (A). For convenience of explanation, the communication terminal 20 (A) and the communication terminal 20 (B) that is a communication partner of the communication terminal 20 (A) are illustrated, but a plurality of communication terminals 20 (B) may exist. Good.

  The response signal receiving unit 100 receives a response signal (for example, Accounting answer) indicating that the accounting process can be executed from the accounting settlement apparatus 15. The response signal receiving unit 100 receives a response signal including a timer value (for example, an Interium value) that triggers execution of the accounting process from the accounting settlement apparatus 15. Further, the communication establishment control unit 110 sends the communication terminal 20 (A) and the communication terminal to the billing settlement apparatus 15 when the half-duplex communication between the communication terminal 20 (A) and the communication terminal 20 (B) is completed. A billing process request signal (for example, Accounting request) indicating that the billing process is requested to be executed is transmitted to each of 20 (B). Then, the response signal receiving unit 100 receives a signal indicating that the charging processing request signal has been received from the charging clearing apparatus 15. The response signal receiving unit 100 supplies the received response signal to the communication establishment control unit 110.

  The connection request receiving unit 102 receives a signal indicating a connection request indicating a request for communication connection from the communication terminal 20 (A) to the communication terminal 20 (B). Specifically, the connection request receiving unit 102 receives a signal indicating a connection request for half-duplex communication from the communication terminal 20 (A) to the communication terminal 20 (B) from the communication terminal 20 (A). Further, the connection request receiving unit 102 receives terminal information for identifying the communication terminal 20 (A) from the communication terminal 20 (A). For example, the connection request receiving unit 102 receives terminal information including at least one of the telephone number and the IP address of the communication terminal 20 (A) together with a signal indicating a connection request from the communication terminal 20 (A). The terminal information includes a communication terminal identifier that identifies the communication terminal 20 (A).

  Further, the connection request receiving unit 102 communicates a communication establishment signal (for example, SIP OK) that is a signal indicating that half-duplex communication between the communication terminal 20 (A) and the communication terminal 20 (B) has been established. Receive from terminal 20 (B). As a result, an RTP (Real-time Transport Protocol) / RTCP (RTP Control Protocol) session is established between the communication terminal 20 (A) and the communication control apparatus 10, and between the communication terminal 20 (B) and the communication control apparatus 10. Established in In addition, the connection request receiving unit 102 has been established between the communication terminal 20 (A) and the communication terminal 20 (B) transmitted by either the communication terminal 20 (A) or the communication terminal 20 (B). An end signal (e.g., SIP BYE) for terminating half-duplex communication is received. The connection request receiving unit 102 supplies a signal indicating the received connection request, terminal information, a communication establishment signal, and an end signal to the communication establishment control unit 110.

  When the communication establishment control unit 110 receives a signal indicating a connection request from the connection request receiving unit 102, the communication establishment control unit 110 establishes communication between the communication terminal 20 (A) and the communication terminal 20 (B). Specifically, the communication establishment control unit 110 performs half-duplex communication between the communication terminal 20 (A) and the communication terminal 20 (B) according to the signal indicating the connection request received from the connection request receiving unit 102. Establish. The communication establishment control unit 110 controls establishment of half-duplex communication via the communication establishment signal transmission unit 122 in order to establish half-duplex communication from the communication terminal 20 (A) to the communication terminal 20 (B). The signal is transmitted to the communication terminal 20 (A) and the communication terminal 20 (B).

  When the communication establishment control unit 110 receives a communication establishment signal from the connection request reception unit 102, the communication establishment control unit 110 calls the billing settlement apparatus 15 via the call / completion signal transmission unit 120. On the other hand, when the end signal is received from the connection request receiving unit 102, the communication establishment control unit 110 transmits a charging process request signal to the charging clearing apparatus 15 via the call / completion signal transmitting unit 120. Further, the communication establishment control unit 110 supplies the terminal information received from the connection request receiving unit 102 to the terminal information storage unit 130 and the billing processing unit 114. Then, the communication establishment control unit 110 supplies a response signal to the billing processing unit 114. Further, the communication establishment control unit 110 sends information indicating that the half-duplex communication is established or canceled between the communication terminal 20 (A) and the communication terminal 20 (B) to the communication method setting control unit 112. Supply.

  The terminal information storage unit 130 associates the communication terminal identifier identifying the communication terminal 20 with the terminal information including at least one of the telephone number and the IP address of the communication terminal 20 received from the communication establishment control unit 110. Stored in association with a communication terminal identifier for identifying the communication terminal 20. The terminal information storage unit 130 supplies the stored terminal information to the communication establishment control unit 110 according to the control of the communication establishment control unit 110. The transmission request receiving unit 104 receives a transmission request for requesting transmission of a voice packet from the communication terminal 20 (A) to the communication terminal 20 (B). Specifically, the transmission request receiving unit 104 receives a transmission request for requesting acquisition of an utterance right that is an authority capable of transmitting a voice packet from the communication terminal 20 (A). The transmission request receiving unit 104 supplies the received transmission request to the communication method setting control unit 112.

  When receiving a transmission request of the communication terminal 20 (A) from the transmission request receiving unit 104, the communication method setting control unit 112 sets the communication terminal 20 (A) to a transmission mode that is a communication mode for transmitting voice packets. . Then, the communication method setting control unit 112 sets the communication terminal 20 (B) to a reception mode that is a communication mode for receiving voice packets. Specifically, the communication system setting control unit 112 transmits a control signal to be set to the transmission mode to the communication terminal 20 (A) via the communication system setting signal transmission unit 124 and transmits a control signal to be set to the reception mode. The data is transmitted to the communication terminal 20 (B) via the communication method setting signal transmission unit 124. The communication method setting control unit 112 supplies the charging processing unit 114 with information indicating that the communication terminal 20 (A) is set to the transmission mode and that the communication terminal 20 (B) is set to the reception mode.

  The voice packet receiving unit 106 receives voice packets from the communication terminal 20 (A) by half-duplex communication. Specifically, the voice packet receiving unit 106 receives a voice packet from the communication terminal 20 (A) that is set to the transmission mode by the communication method setting control unit 112. The voice packet receiving unit 106 supplies a signal indicating the timing when the voice packet starts to be received from the communication terminal 20 (A) and the timing when the reception of the voice packet from the communication terminal 20 (A) is completed to the charging processing unit 114. . The voice packet receiving unit 106 supplies the received voice packet to the voice packet transmitting unit 126. The voice packet transmitting unit 126 transmits the voice packet received from the voice packet receiving unit 106 to the communication terminal 20 (B). The voice packet transmitting unit 126 supplies the charging processing unit 114 with a signal indicating the timing at which the voice packet starts to be transmitted to the communication terminal 20 (B) and the timing at which the transmission of the voice packet to the communication terminal 20 (B) is completed. To do.

  The billing processing unit 114 does not perform billing processing for communication from the communication terminal 20 (A) to the communication terminal 20 (B) before the voice packet receiving unit 106 receives the voice packet from the communication terminal 20 (A). After the voice packet receiving unit 106 receives the voice packet from the communication terminal 20 (A), the charging process is performed for the communication from the communication terminal 20 (A) to the communication terminal 20 (B). Specifically, the charging processing unit 114 causes the communication method setting control unit 112 to set the communication mode of the communication terminal 20 (A) to the transmission mode and to set the communication mode of the communication terminal 20 (B) to the reception mode. The voice packet receiving unit 106 receives a voice packet from the communication terminal 20 (A) without charging the communication from the communication terminal 20 (A) to the communication terminal 20 (B) until a signal indicating that the communication terminal 20 (B) is received. Later, billing processing is performed for communication from the communication terminal 20 (A) to the communication terminal 20 (B).

  More specifically, billing processing unit 114 receives terminal information or communication terminal identifier that can identify communication terminal 20 (A) from communication establishment control unit 110. Then, billing processing section 114 performs billing processing for each voice packet received by voice packet receiving section 106 in association with the received terminal information or communication terminal identifier. The charging processing unit 114 performs charging processing for each predetermined number of voice packets (for example, for each talk burst) or for each of a plurality of voice packets received by the voice packet receiving unit 106 within a predetermined time. .

  For example, the billing processing unit 114 monitors whether the voice packet transmission unit 126 has transmitted a predetermined number of voice packets to the communication terminal 20 (B). Then, billing processing unit 114 performs billing processing when it detects that voice packet transmitting unit 126 has transmitted a predetermined number of voice packets to communication terminal 20 (B). Consider a case where the accounting processing unit 114 receives a timer value from the communication establishment control unit 110. In such a case, the charging processing unit 114 performs charging processing when the time specified by the received timer value has elapsed. The billing process is such that the user of the communication terminal 20 (A) charges the communication fee paid to the communication carrier by the user of the communication terminal 20 (A) from the external billing settlement device 15 to the user for the voice packet received by the voice packet receiving unit 106. Includes a process in which the charging processing unit 114 generates charging processing information including information indicating.

  The billing processing unit 114 may perform billing processing both at the timing when the voice packet receiving unit 106 starts receiving the voice packet and at the timing when the voice packet transmitting unit 126 starts sending the voice packet. For example, the charging processing unit 114 performs the first charging process at the timing when the voice packet receiving unit 106 receives the voice packet, and performs the second charging process at the timing when the voice packet transmitting unit 126 transmits the voice packet. To do. Then, the billing processing unit 114 may generate billing process information as a billing process performed on the voice packet by combining the first billing process and the second billing process. Thereby, for example, the weight of the communication charge can be provided between the first charging process and the second charging process. For example, depending on the type of the communication path from the communication terminal 20 (A) to the communication control apparatus 10 and the communication path from the communication control apparatus 10 to the communication terminal 20 (B), variations in the setting of communication charges are made. be able to.

  Here, after receiving a signal indicating the timing at which the voice packet is transmitted from the voice packet transmitter 126 to the communication terminal 20 (B), the billing processor 114 transmits the signal from the communication terminal 20 (A) to the communication terminal 20 (B). It is preferable to charge for the communication. The accounting processing unit 114 receives a signal indicating the completion timing of transmission of the voice packet from the voice packet transmission unit 126 to the communication terminal 20 (B), and then transmits the signal from the communication terminal 20 (A) to the communication terminal 20 (B). Billing processing may be performed for the communication. The accounting processing unit 114 also indicates a signal indicating the timing at which the voice packet is received from the communication terminal 20 (A) from the voice packet receiving unit 106 or the timing at which the voice packet is completely received from the communication terminal 20 (A). After receiving the signal, the charging process may be performed for the communication from the communication terminal 20 (A) to the communication terminal 20 (B).

  Here, the accounting processing information storage unit 132 associates the communication terminal identifier for identifying the communication terminal 20 (A) with the accounting processing unit 114 for communication from the communication terminal 20 (A) to the communication terminal 20 (B). Each time charging processing is performed, charging processing information indicating that the communication terminal 20 (A) should be charged is stored. Specifically, the billing processing unit 114 indicates that the communication terminal 20 (A) should be billed each time billing processing is performed for communication from the communication terminal 20 (A) to the communication terminal 20 (B). The charging process information is stored in the charging process information storage unit 132 in association with the communication terminal identifier for identifying the communication terminal 20 (A).

  Then, the charging processing information transmitting unit 128 is controlled by the charging processing unit 114 to transmit the charging processing information stored in the charging processing information storage unit 132 to the communication terminal 20 ( A) is transmitted to an external billing settlement apparatus 15 that performs billing settlement processing. The accounting processing information transmission unit 128 is already generated in either case while the voice packet reception unit 106 receives a voice packet or while the voice packet transmission unit 126 transmits a voice packet. The billing processing information can be transmitted to the external billing settlement apparatus 15. In addition, the charging process information transmitting unit 128 transmits the charging process information stored in the charging process information storage unit 132 to the communication terminal 20 (A) when the charging process unit 114 performs a predetermined number of charging processes. ) May be transmitted to the external billing settlement apparatus 15 that performs the billing settlement processing for.

  According to the communication control apparatus 10 according to the present embodiment, a voice packet is received from the communication terminal 20 (A) and is received by the communication terminal 20 (B) that is a communication partner of the communication terminal 20 (A). It is possible to charge the communication terminal 20 (A) at the timing of transmitting the packet. Accordingly, in the PTT communication, it is possible to appropriately charge the communication terminal 20 having the utterance right at the timing when the voice packet transmitted from the communication terminal 20 that has acquired the utterance right surely reaches the communication terminal 20 of the communication partner.

  FIG. 3 shows an example of the functional configuration of the communication terminal 20 according to the present embodiment. The first communication terminal and the second communication terminal described in the claims are examples of the communication terminal 20. The communication terminal 20 includes a communication establishment signal receiving unit 200, a communication method setting signal receiving unit 202, a communication terminal side voice packet receiving unit 204, a transmission request input unit 210, a voice input unit 212, a communication connection request unit 220, and a communication method control unit. 222, a voice packet generation unit 224, a connection request transmission unit 230, a transmission request transmission unit 232, a communication terminal side voice packet transmission unit 234, a voice output unit 240, and a voice detection unit 250. In the following description, the communication terminal 20 that transmits voice packets is described as a first communication terminal, and the communication terminal that receives voice packets is described as a second communication terminal.

  The transmission request input unit 210 causes the user to input a signal indicating a connection request for half-duplex communication to the second communication terminal that is the communication partner. The transmission request input unit 210 also transmits a signal indicating a transmission request for requesting transmission of a voice packet to the second communication terminal after half-duplex communication is established between the first communication terminal and the second communication terminal. Let the user input. The transmission request input unit 210 supplies a signal indicating a connection request input by the user to the communication connection request unit 220. Further, the transmission request input unit 210 supplies a signal indicating the transmission request input by the user to the transmission request transmission unit 232.

  The communication connection request unit 220 receives a signal indicating a connection request for half-duplex communication with the second communication terminal from the transmission request input unit 210 and transmits the signal to the communication control apparatus 10. Specifically, the communication connection request unit 220 supplies a signal indicating the connection request received from the transmission request input unit 210 to the connection request transmission unit 230. Then, the communication connection request unit 220 causes the connection request transmission unit 230 to transmit a signal indicating a connection request to the communication control apparatus 10. The first communication connection request unit recited in the claims is an example of the communication connection request unit 220.

  The communication establishment signal receiving unit 200 receives a signal for controlling the establishment of half-duplex communication between the first communication terminal and the second communication terminal, which is transmitted by the communication establishment signal transmission unit 122 included in the communication control apparatus 10. . The communication establishment signal receiving unit 200 supplies a signal for controlling establishment of the received half-duplex communication to the communication method control unit 222. Further, the communication method setting signal receiving unit 202 transmits the control signal for setting the first communication terminal to the transmission mode transmitted by the communication method setting signal transmitting unit 124 included in the communication control device 10 or the first communication terminal in the reception mode. The control signal to be set to is received. The communication system setting signal receiving unit 202 supplies the received control signal to the communication system control unit 222.

  The communication system control unit 222 controls the communication mode of the first communication terminal. Specifically, after receiving a signal for controlling the establishment of half-duplex communication from the communication establishment signal receiving unit 200, the communication method control unit 222 causes the first communication terminal to communicate in either the transmission mode or the reception mode. Set to standby mode that allows mode transition. Subsequently, the communication system control unit 222 sets the communication mode of the first communication terminal to either the transmission mode or the reception mode according to the control signal received from the communication system setting signal reception unit 202.

  Specifically, when the communication method setting signal receiving unit 202 receives a control signal for setting the transmission mode, the communication method control unit 222 transmits a signal indicating the transmission request input by the transmission request input unit 210 to the communication control device 10. The transmission request transmission unit 232 is controlled so that transmission is possible. Furthermore, when the communication method setting signal receiving unit 202 receives a control signal for setting the transmission mode, the communication method control unit 222 enables the communication terminal side audio packet transmitting unit 234 to transmit the audio packet to the communication control device 10. Therefore, the communication terminal side voice packet transmission unit 234 is controlled.

  On the other hand, when the communication method setting signal receiving unit 202 receives the control signal for setting the reception mode, the communication method control unit 222 disables the communication terminal side voice packet transmission unit 234 to transmit the voice packet to the communication control apparatus 10. Therefore, the communication terminal side voice packet transmission unit 234 is controlled. Then, the communication method control unit 222 controls the communication terminal side voice packet receiving unit 204 so that the communication terminal side voice packet receiving unit 204 can receive voice packets from the communication control apparatus 10.

  The transmission request transmission unit 232 transmits a signal indicating the transmission request received from the transmission request input unit 210 to the communication control apparatus 10. Specifically, when the communication method control unit 222 controls the first communication terminal to the transmission mode, the transmission request transmission unit 232 transmits a signal indicating the transmission request to the communication control device 10.

  The voice input unit 212 inputs voice. Specifically, the voice input unit 212 inputs the voice of the user who uses the first communication terminal and the sound of the environment around the first communication terminal. The voice input unit 212 supplies the input voice to the voice packet generation unit 224 and the voice detection unit 250. The voice detection unit 250 detects voices having a predetermined volume or higher from the voices input to the voice input unit 212. The voice detection unit 250 operates the voice packet generation unit 224 by operating the voice packet generation unit 224 when detecting a voice with a sound volume higher than a predetermined volume.

  The voice packet generation unit 224 starts to generate a voice packet indicating the voice received from the voice input unit 212 when the voice detection unit 250 detects a voice of a predetermined volume or higher. The voice packet generation unit 224 may further compress the generated voice packet in order to reduce the data amount of the generated voice packet. The voice packet generation unit 224 supplies the generated voice packet to the communication terminal side voice packet transmission unit 234.

  The communication terminal side voice packet transmission unit 234 is a half-duplex between the first communication terminal and the second communication terminal in response to the connection request transmitted from the communication connection request unit 220 to the communication control device 10 via the connection request transmission unit 230. When communication is established, a voice packet to the second communication terminal is transmitted to the communication control device 10. Specifically, the communication terminal side voice packet transmitter 234 controls the communication control device 222 to transmit the voice packet generated by the voice packet generator 224 when the communication method controller 222 controls the voice packet to be transmitted. 10 to send. Note that the first communication terminal side voice packet transmission unit described in the claims is an example of the communication terminal side voice packet transmission unit 234.

  The communication terminal side voice packet receiving unit 204 receives a voice packet transmitted from the second communication terminal via the communication control apparatus 10. The communication terminal side voice packet receiving unit 204 receives a voice packet when the communication method control unit 222 sets the first communication terminal to the reception mode. The communication terminal side voice packet receiving unit 204 supplies the received voice packet to the voice output unit 240. The voice output unit 240 generates voice from the voice packet received from the communication terminal side voice packet receiver 204 and outputs the voice. If the voice packet is compressed, the voice output unit 240 decodes the compressed voice packet to generate voice.

  The communication terminal 20 according to the present embodiment generates a voice packet from the voice input to the communication terminal 20 on the condition that a voice with a predetermined volume or higher is detected, and communicates with the communication partner via the communication control device 10. Can be transmitted to the communication terminal 20. As a result, since voices with a predetermined volume or lower, for example, silent voice packets, are not transmitted to the communication control apparatus 10, it is possible to reduce communication traffic and to save communication charges for the user. is there.

  FIG. 4 shows an example of the data configuration of the charging process information storage unit 132 according to the present embodiment. The billing processing information storage unit 132 associates with the first communication terminal identifier for identifying the first communication terminal, and whenever the billing processing unit 114 performs billing processing for communication from the first communication terminal to the second communication terminal. And charging processing information indicating that the first communication terminal should be charged. The charging process information storage unit 132 stores the date and time when the charging process is performed, the call time that is the target of the charging process, and the data amount of the voice packet that is the target of the charging process, in association with the first communication terminal identifier. Note that the data amount of the voice packet stored in association with the communication terminal identifier by the charging processing information storage unit 132 may be the total data amount of a plurality of voice packets.

  For example, the accounting processing information storage unit 132 associates the communication terminal identifier 2000 with the date and time when the accounting processing was performed on the communication terminal 20 corresponding to the communication terminal identifier 2000 (for example, August 1, 2006, 10:00). 0 minute 0 second), call time (for example, 5 seconds), and data amount of voice packet (for example, 40 kB) to be charged are stored. Similarly, the charging process information storage unit 132 associates the communication terminal identifier 2100 with the date and time when the charging process is performed on the communication terminal 20 corresponding to the communication terminal identifier 2100, the call time, and the target of the charging process. The amount of voice packet data to be stored is stored.

  That is, the billing processing information storage unit 132 associates the communication terminal identifier that identifies the communication terminal 20 that has acquired the utterance right, the date and time when the communication terminal 20 acquired the utterance right, and the utterance right. Stores the data amount of the voice packet transmitted to the communication terminal 20 of the communication partner. The accounting processing information storage unit 132 is controlled by the accounting processing unit 114 to store the date / time, call duration, and voice packet data amount stored in association with the communication terminal identifier as accounting processing information. The data is transmitted to the external billing settlement apparatus 15 via 128.

  FIG. 5 shows an example of a processing flow in the communication control apparatus 10 according to the present embodiment. First, the connection request receiving unit 102 receives a signal indicating a connection request for half-duplex communication from the first communication terminal to the second communication terminal that is the communication partner of the first communication terminal (S2000). The communication establishment control unit 110 establishes half-duplex communication between the first communication terminal and the second communication terminal in response to the connection request received by the connection request reception unit 102 (S2010). Then, the communication establishment control unit 110 calls the external billing settlement apparatus 15 after establishing half-duplex communication between the first communication terminal and the second communication terminal (S2020). As a result, the external billing settlement apparatus 15 is ready to execute the billing process.

  Subsequently, the first communication terminal transmits a signal indicating a transmission request for the voice packet to the second communication terminal to the transmission request receiving unit 104. The transmission request receiving unit 104 receives a signal indicating a transmission request from the first communication terminal (S2030). The transmission request receiving unit 104 supplies a signal indicating the received transmission request to the communication method setting control unit 112. The communication system setting control unit 112 receives a signal indicating a transmission request from the transmission request receiving unit 104 and then transmits a control signal for setting the first communication terminal to the transmission mode via the communication system setting signal transmitting unit 124. The first communication terminal is set to the transmission mode by transmitting to the communication terminal (S2040). Further, the communication method setting control unit 112 transmits a control signal for setting the second communication terminal to the reception mode to the second communication terminal via the communication method setting signal transmission unit 124, and sets the second communication terminal to the reception mode. (S2040).

  Then, the first communication terminal sets the communication mode to the transmission mode in accordance with the control of the communication method setting control unit 112. The first communication terminal transmits a voice packet to the second communication terminal to the voice packet receiving unit 106. The voice packet receiving unit 106 receives a voice packet transmitted from the first communication terminal to the second communication terminal. The voice packet receiving unit 106 transmits the received voice packet to the second communication terminal via the voice packet transmitting unit 126, and also indicates that the voice packet has been received, the date and time when the voice packet was received, and the number of voice packets , And the data amount of the voice packet is supplied to the billing processing unit 114.

  The billing processing unit 114 indicates that billing processing should be performed for communication from the first communication terminal to the second communication terminal after the voice packet receiving unit 106 receives a notification indicating that the voice packet has been received. Billing processing is performed by generating processing information (S2050). The billing processing unit 114 continues the billing process until a predetermined condition is satisfied (S2060: No). For example, the billing processing unit 114 changes from the first communication terminal to the second communication terminal until a predetermined time elapses after half-duplex communication is established between the first communication terminal and the second communication terminal. Charging processing is repeated for each of the communication and the communication from the second communication terminal to the first communication terminal (S2060: No).

  In addition, the billing processing unit 114 determines the number or data amount of voice packets transmitted from the first communication terminal to the second communication terminal after the half-duplex communication is established between the first communication terminal and the second communication terminal. And the communication from the first communication terminal to the second communication terminal until the number or data amount of voice packets transmitted from the second communication terminal to the first communication terminal reaches a predetermined reference value, and the second communication The charging process may be repeated for each communication from the terminal to the first communication terminal (S2060: No).

  The charging processing unit 114 stores the result of the charging process in the charging process information storage unit 132. The charging processing unit 114 determines that the predetermined condition is satisfied when a predetermined time has elapsed (S2060: Yes), and the charging processing information is stored in the charging processing information storage unit 132 as a plurality of charging processing information. The data is transmitted to the external billing settlement apparatus 15 via the transmission unit 128 (S2070). In addition, the charging processing unit 114 assumes that a predetermined condition is satisfied when a predetermined reference value is reached (S2060: Yes), and a plurality of charging processing information stored in the charging processing information storage unit 132 is It may be transmitted to the external billing settlement apparatus 15 via the billing processing information transmitting unit 128 (S2070).

  Then, the billing processing unit 114 transmits the billing processing information generated by repeating the billing process until the half-duplex communication between the first communication terminal and the second communication terminal is completed, to the external billing settlement apparatus 15. (S2080: No). On the other hand, when the half-duplex communication between the first communication terminal and the second communication terminal is terminated, the billing processing unit 114 sends a signal to the external billing settlement apparatus 15 that the half-duplex communication is terminated. And a signal indicating that final billing processing should be performed for each of communication from the first communication terminal to the second communication terminal and communication from the second communication terminal to the first communication terminal (S2080). : Yes).

  FIG. 6 shows an example of a sequence diagram showing a processing flow of the communication system according to the present embodiment. First, the communication terminal 20 (A) transmits a SIP INVITE message to the communication control apparatus 10 that controls the PoC service (S1000). The communication control apparatus 10 transmits the SIP INVITE message received from the communication terminal 20 (A) to the communication terminal 20 (B) (S1010). The communication terminal 20 (B) transmits a SIP OK response message to the SIP INVITE message to the communication control apparatus 10 (S1020). And the communication control apparatus 10 transmits a SIP OK response message to the communication terminal 20 (A), when a SIP OK response message is received from the communication terminal 20 (B) (S1020). Thereby, an RTP / RTCP session is established between the communication terminal 20 (A) and the communication terminal 20 (B).

  Then, after receiving the SIP OK response message from the communication terminal 20 (B), the communication control device 10 transmits an Accounting request (Start) message to the billing clearing device 15 to call the billing function of the billing clearing device 15 ( S1030). The Accounting request (Start) message is a message that notifies the billing settlement apparatus 15 that an RTP / RTCP session has been established between the communication terminal 20 (A) and the communication terminal 20 (B). In response to the Accounting request (Start) message transmitted by the communication control device 10, the billing settlement device 15 transmits an Accounting answer message to the communication control device 10 (S1040). The Accounting answer message includes a timer value (Interium value) that triggers execution of the accounting process.

  After the RTP / RTCP session is established between the communication terminal 20 (A) and the communication terminal 20 (B), the communication terminal 20 (A) performs communication control on a Talk burst request message that requests transmission of a plurality of voice packets. It transmits to the apparatus 10 (S1050). After receiving the Talk burst request message from the communication terminal 20 (A), the communication control apparatus 10 transmits a Talk burst granted message to the communication terminal 20 (A) to the communication terminal 20 (A) (S1060). In other words, the communication control apparatus 10 transmits a speech right, which is a right to transmit a voice packet from the communication terminal 20 (A) to the communication terminal 20 (B), and a Talk burst granted message to the communication terminal 20 (A). Granted by sending to 20 (A).

  Further, the communication control device 10 transmits a Talk burst taken message to the communication terminal 20 (B) (S1070). Thereby, the communication terminal 20 (B) recognizes that the communication terminal 20 (B) is in a state where it cannot acquire the right to speak. Then, the communication terminal 20 (A) transmits a plurality of voice packets, for example, Talk burst, to the communication terminal 20 (B) using RTP (S1080). The communication control apparatus 10 transmits the voice packet received from the communication terminal 20 (A) to the communication terminal 20 (B) (S1090). The communication control device 10 performs a billing process each time a voice packet is transmitted.

  When the communication terminal 20 (A) finishes transmitting the voice packet, the communication terminal 20 (A) releases the acquired utterance right (Talk burst release (S1100)). When the communication terminal 20 (A) releases the right to speak, the communication control apparatus 10 sets both the communication terminal 20 (A) and the communication terminal 20 (B) to the standby mode (Talk burst idle (S1110)). ). And the communication control apparatus 10 preserve | saves all the Talk bursts which are the RTP / RTCP packet transmitted / received between the steps from S1050 to S1090 (S1120).

  Next, the communication control device 10 performs the clearing process when the time specified by the timer value received from the billing clearing device 15 in S1040 has elapsed or when a predetermined number of Talk bursts have been transmitted. Is started (S1130). That is, all the billing process information until the time specified by the timer value received from the billing clearing apparatus 15 in S1040 has passed, or the billing process information indicating that a predetermined number of Talk bursts have been transmitted, etc. The Accounting request message including the message is transmitted to the billing settlement apparatus 15 (S1140). The billing clearing apparatus 15 notifies the fact that the Account request message has been received by transmitting an Account answer message to the communication control apparatus 10 (S1150).

  The communication terminal 20 (A) transmits a SIP BYE message to the communication control apparatus 10 in order to end the RTP / RTCP session with the communication terminal 20 (B) (S1160). When the communication control apparatus 10 receives the SIP BYE message from the communication terminal 20 (A), the communication control apparatus 10 ends the RTP / RTCP session established between the communication terminal 20 (A) and the communication terminal 20 (B). To do. Then, the communication control apparatus 10 transmits an accounting request (Stop) message indicating that the charging of the session is terminated to the charging clearing apparatus 15. The billing clearing apparatus 15 transmits an Accounting answer message indicating that the Accounting request (Stop) message has been received to the communication control apparatus 10 (S1180).

  FIG. 7 shows an example of a hardware configuration of the communication control apparatus 10 according to the present embodiment. The communication control apparatus 10 according to the present embodiment includes a CPU peripheral unit having a CPU 1505, a RAM 1520, a graphic controller 1575, and a display device 1580 connected to each other by a host controller 1582, and a host controller 1582 by an input / output controller 1584. I / O unit having a communication interface 1530, a hard disk drive 1540, and a CD-ROM drive 1560 connected to the I / O controller, and a legacy input having a ROM 1510, a flexible disk drive 1550, and an I / O chip 1570 connected to the I / O controller 1584. And an output unit.

  The host controller 1582 connects the RAM 1520 to the CPU 1505 and the graphic controller 1575 that access the RAM 1520 at a high transfer rate. The CPU 1505 operates based on programs stored in the ROM 1510 and the RAM 1520 to control each unit. The graphic controller 1575 acquires image data generated by the CPU 1505 or the like on a frame buffer provided in the RAM 1520 and displays the image data on the display device 1580. Alternatively, the graphic controller 1575 may include a frame buffer that stores image data generated by the CPU 1505 or the like.

  The input / output controller 1584 connects the host controller 1582 to the communication interface 1530, the hard disk drive 1540, and the CD-ROM drive 1560, which are relatively high-speed input / output devices. The communication interface 1530 communicates with other devices via a network. The hard disk drive 1540 stores programs and data used by the CPU 1505 in the communication control apparatus 10. The CD-ROM drive 1560 reads a program or data from the CD-ROM 1595 and provides it to the hard disk drive 1540 via the RAM 1520.

  The input / output controller 1584 is connected to the ROM 1510, the flexible disk drive 1550, and the relatively low-speed input / output device of the input / output chip 1570. The ROM 1510 stores a boot program that the communication control device 10 executes at startup, a program that depends on the hardware of the communication control device 10, and the like. The flexible disk drive 1550 reads a program or data from the flexible disk 1590 and provides it to the hard disk drive 1540 via the RAM 1520. The input / output chip 1570 connects various input / output devices via a flexible disk drive 1550 such as a parallel port, a serial port, a keyboard port, and a mouse port.

  A communication control program provided to the hard disk drive 1540 via the RAM 1520 is stored in a recording medium such as the flexible disk 1590, the CD-ROM 1595, or an IC card and provided by the user. The communication control program is read from the recording medium, installed in the hard disk drive 1540 in the communication control device 10 via the RAM 1520, and executed by the CPU 1505. The communication control program installed and executed in the communication control apparatus 10 works on the CPU 1505 or the like to cause the communication control apparatus 10 to respond to the response signal receiving unit 100, the connection request receiving unit 102, and the transmission request described with reference to FIGS. Receiving unit 104, voice packet receiving unit 106, communication establishment control unit 110, communication method setting control unit 112, billing processing unit 114, call / completion signal transmission unit 120, communication establishment signal transmission unit 122, communication method setting signal transmission unit 124 , Voice packet transmission unit 126, charging process information transmission unit 128, terminal information storage unit 130, and charging process information storage unit 132.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

1 is a schematic diagram of a communication control device 10. FIG. 2 is a block diagram showing a functional configuration of a communication control device 10. FIG. 3 is a block diagram showing a functional configuration of a communication terminal 20. FIG. The data structure of the accounting process information storage part 132 is shown. 4 is a flowchart showing a flow of processing in the communication control apparatus 10. It is a sequence diagram which shows the flow of a process of a communication system. 2 is a block diagram illustrating a hardware configuration of a communication control device 10. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Communication control apparatus 15 Charge clearing apparatus 20 Communication terminal 30 Server system 40 Network 100 Response signal receiving part 102 Connection request receiving part 104 Transmission request receiving part 106 Voice packet receiving part 110 Communication establishment control part 112 Communication system setting control part 114 Charging process Unit 120 paging / completion signal transmission unit 122 communication establishment signal transmission unit 124 communication method setting signal transmission unit 126 voice packet transmission unit 128 charging process information transmission unit 130 terminal information storage unit 132 charging process information storage unit 200 communication establishment signal reception unit 202 Communication system setting signal reception unit 204 Communication terminal side voice packet reception unit 210 Transmission request input unit 212 Voice input unit 220 Communication connection request unit 222 Communication method control unit 224 Voice packet generation unit 230 Connection request transmission unit 232 Transmission request transmission unit 234 Terminal side audio packet transmission unit 240 audio output unit 250 speech detection unit 400, 402 arrow 1505 CPU
1510 ROM
1520 RAM
1530 Communication interface 1540 Hard disk drive 1550 Flexible disk drive 1560 CD-ROM drive 1570 Input / output chip 1575 Graphic controller 1580 Display device 1582 Host controller 1584 Input / output controller 1590 Flexible disk 1595 CD-ROM
2000, 2100 Communication terminal identifier

Claims (11)

A communication control device that relays and controls half-duplex communication between a first communication terminal and a second communication terminal that is a communication partner of the first communication terminal,
A voice packet receiver for receiving voice packets from the first communication terminal by half-duplex communication;
Before the voice packet receiving unit receives the voice packet from the first communication terminal, the voice packet receiving unit does not perform charging processing for communication from the first communication terminal to the second communication terminal. A communication control apparatus comprising: a charging processing unit that performs a charging process for communication from the first communication terminal to the second communication terminal after receiving a voice packet from the communication terminal. A mode in which the first communication terminal is set to a transmission mode that is a mode for transmitting a voice packet and a voice packet is received when a transmission request for the voice packet from the first communication terminal to the second communication terminal is received. A communication method setting control unit for setting the second communication terminal to the reception mode which is:
The voice packet receiving unit receives a voice packet from the first communication terminal that is set to the transmission mode by the communication method setting control unit,
The charging processing unit causes the communication method setting control unit to set the mode of the first communication terminal to a transmission mode and from the first communication terminal until the mode of the second communication terminal is set to a reception mode. Billing processing for communication from the first communication terminal to the second communication terminal after the voice packet receiving unit receives the voice packet from the first communication terminal without performing billing processing for communication to the second communication terminal The communication control device according to claim 1 which performs. A voice packet transmitter that transmits the voice packet received by the voice packet receiver to the second communication terminal;
The billing processing unit performs billing processing for communication from the first communication terminal to the second communication terminal after the voice packet transmission unit transmits a voice packet from the first communication terminal to the second communication terminal. The communication control apparatus according to claim 1. The billing processing unit transmits the voice packet received by the voice packet reception unit from the first communication terminal to the second communication terminal after the voice packet transmission unit transmits all the voice packets to the second communication terminal. The communication control apparatus according to claim 3, wherein a charging process for communication with a terminal is performed. Each time the accounting processing unit performs accounting processing for communication from the first communication terminal to the second communication terminal in association with the first communication terminal identifier for identifying the first communication terminal, the first communication terminal identifier A charging process information storage unit for storing charging process information indicating that the communication terminal should be charged;
A billing process information transmitting unit that transmits the billing process information stored in the billing process information storage unit to an external billing settlement apparatus that performs a billing settlement process for the first communication terminal each time a predetermined time elapses; The communication control device according to claim 1, further comprising: Each time the accounting processing unit performs accounting processing for communication from the first communication terminal to the second communication terminal in association with the first communication terminal identifier for identifying the first communication terminal, the first communication terminal identifier A charging process information storage unit for storing charging process information indicating that the communication terminal should be charged;
When the billing processing unit performs a predetermined number of billing processes, the billing processing information stored in the billing processing information storage unit is used as an external billing settlement for performing the billing settlement process for the first communication terminal. The communication control device according to claim 1, further comprising: an accounting processing information transmission unit that transmits the device. A communication control method for relaying and controlling half-duplex communication between a first communication terminal and a second communication terminal that is a communication partner of the first communication terminal,
A voice packet receiving step of receiving voice packets from the first communication terminal by half-duplex communication;
Before receiving a voice packet from the first communication terminal in the voice packet receiving step, no charging process is performed for communication from the first communication terminal to the second communication terminal, and the first packet is received in the voice packet receiving step. A charging control method comprising: a charging process step of performing a charging process for communication from the first communication terminal to the second communication terminal after receiving a voice packet from the communication terminal. A communication control program for a communication control apparatus that relays and controls half-duplex communication between a first communication terminal and a second communication terminal that is a communication partner of the first communication terminal, the communication control apparatus comprising: ,
A voice packet receiver for receiving voice packets from the first communication terminal by half-duplex communication;
Before the voice packet receiving unit receives the voice packet from the first communication terminal, the voice packet receiving unit does not perform charging processing for communication from the first communication terminal to the second communication terminal. A communication control program that functions as a charging processing unit that performs a charging process for communication from the first communication terminal to the second communication terminal after receiving a voice packet from a communication terminal. A communication system comprising: a first communication terminal; and a communication control device that controls half-duplex communication between the first communication terminal and a second communication terminal that is a communication partner of the first communication terminal,
The first communication terminal is
A first communication connection request unit that transmits a signal indicating a connection request for half-duplex communication to the second communication terminal that is a communication partner to the communication control device;
When half-duplex communication between the first communication terminal and the second communication terminal is established by the connection request transmitted by the first communication connection request unit, the voice packet to the second communication terminal is A first communication terminal side voice packet transmitter for transmitting to the communication control device;
The communication control device includes:
A voice packet receiving unit for receiving voice packets from the first communication terminal side voice packet transmitting unit by half-duplex communication;
Before the voice packet receiving unit receives a voice packet from the first communication terminal side voice packet transmitting unit, the voice packet reception is not performed without performing a charging process for communication from the first communication terminal to the second communication terminal. A charging processing unit that performs a charging process for communication from the first communication terminal to the second communication terminal after the unit receives the voice packet from the first communication terminal side voice packet transmission unit. The communication control device includes:
A mode in which the first communication terminal is set to a transmission mode that is a mode for transmitting a voice packet and a voice packet is received when a transmission request for the voice packet from the first communication terminal to the second communication terminal is received. A communication system setting control unit for setting the second communication terminal to the reception mode of
The voice packet receiving unit receives a voice packet from the first communication terminal side voice packet transmitting unit of the first communication terminal that is set to the transmission mode by the communication method setting control unit,
The charging processing unit causes the communication method setting control unit to set the mode of the first communication terminal to a transmission mode and from the first communication terminal until the mode of the second communication terminal is set to a reception mode. After the voice packet receiver receives the voice packet from the first communication terminal side voice packet transmitter without performing the billing process for the communication to the second communication terminal, the first communication terminal to the second communication terminal The communication system according to claim 9, wherein billing processing is performed for the communication. The first communication terminal is
A voice input unit for inputting voice;
Among the voices input to the voice input unit, a voice detection unit that detects voices of a predetermined volume or higher;
A voice packet generation unit that starts generating a voice packet indicating the voice input to the voice input unit when the voice detection unit detects a voice of a predetermined volume or higher;
The communication system according to claim 9, wherein the first communication terminal-side voice packet transmitter transmits the voice packet generated by the voice packet generator to the communication control device.

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