WO2015068665A1 - 中継装置、音声通信システム、プログラムおよび中継方法 - Google Patents
中継装置、音声通信システム、プログラムおよび中継方法 Download PDFInfo
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- WO2015068665A1 WO2015068665A1 PCT/JP2014/079134 JP2014079134W WO2015068665A1 WO 2015068665 A1 WO2015068665 A1 WO 2015068665A1 JP 2014079134 W JP2014079134 W JP 2014079134W WO 2015068665 A1 WO2015068665 A1 WO 2015068665A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
- H04M3/568—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities audio processing specific to telephonic conferencing, e.g. spatial distribution, mixing of participants
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
- H04W4/10—Push-to-Talk [PTT] or Push-On-Call services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/40—Support for services or applications
- H04L65/401—Support for services or applications wherein the services involve a main real-time session and one or more additional parallel real-time or time sensitive sessions, e.g. white board sharing or spawning of a subconference
- H04L65/4015—Support for services or applications wherein the services involve a main real-time session and one or more additional parallel real-time or time sensitive sessions, e.g. white board sharing or spawning of a subconference where at least one of the additional parallel sessions is real time or time sensitive, e.g. white board sharing, collaboration or spawning of a subconference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/40—Support for services or applications
- H04L65/403—Arrangements for multi-party communication, e.g. for conferences
Definitions
- the present invention relates to a voice communication system using a network such as a wireless LAN.
- wireless communication devices that transmit high-frequency carriers, which are continuous-time signals, are modulated with analog signals or digital signals, and are mainly used as devices for wireless voice communication.
- the wireless communication device is basically one-to-one communication, but a wireless communication device having a group communication function for simultaneously communicating between a plurality of wireless communication devices has also been proposed.
- a wireless communication system (trunking wireless system) including a repeater has been proposed.
- This system has a priority call function that can be called (communication) even if a wireless communication device is currently communicating (calling) if there is a communication request (calling) with a high priority.
- a wireless communication device determines communication priority and switches communication. Specifically, the communication is switched by changing to a relay channel corresponding to a communication request having a high priority.
- the present invention connects a relay device and a terminal device that is a communication device via a communication network, and allows management of communication between terminal devices on the relay device side based on communication priority. It is an object of the present invention to provide a voice communication system and a relay device used in this system that enable switching to high priority communication collectively on the relay device side.
- the relay device of the present invention includes a network communication unit that communicates with a plurality of terminal devices via a communication network, a control unit, and a priority information storage unit.
- the control unit receives the calling voice signal from the terminal device, the control unit establishes a communication session in which the terminal device and the communication partner terminal device specified by the calling voice signal participate, and the terminals participating in the communication session Transfer audio signals between devices.
- the priority information storage unit stores priority information related to the communication session.
- the control unit receives a call voice signal designating a terminal device participating in an existing communication session as a communication partner
- the control unit establishes a new communication session to be established with the existing communication session and the current call voice signal.
- a priority determination unit that determines the priority based on priority information, and if the priority of a new communication session is higher than the existing communication session, the existing terminal device participating in the existing communication session Remove from the current communication session and join a new communication session.
- a program according to the present invention includes a network communication unit that communicates with a plurality of terminal devices via a network, and a relay device computer that includes a storage unit that stores priority information of a communication session performed by the plurality of terminal devices.
- a call voice signal is received from the terminal, a communication session is established in which the terminal device and the communication partner terminal device specified by the call voice signal participate, and the voice signals are mutually exchanged between the terminal devices participating in the communication session. It functions as the first means for transferring.
- the first means When the first means receives a call voice signal that designates a terminal device participating in an existing communication session as a communication partner, the first means includes an existing communication session and a new communication session to be established with the current call voice signal; A second means for determining the priority of the communication device based on the priority information, and if the priority of the new communication session is higher than the existing communication session, the terminal device participating in the existing communication session It includes a third means for removing the session and joining the new communication session.
- the relay method of the present invention includes a network communication unit that communicates with a plurality of terminal devices via a network, and a control unit of the relay device that includes a storage unit that stores priority information of a communication session by the plurality of terminal devices.
- the first procedure is that when a call voice signal designating a terminal device participating in an existing communication session as a communication partner is received, the existing communication session and a new communication session to be established with the current call voice signal
- the second procedure for determining the priority of the communication device based on the priority information, and if the priority of the new communication session is higher than the existing communication session, the terminal device participating in the existing communication session Includes a third procedure to remove the session and join a new communication session.
- control unit and the first means also include an individual communication session in which one terminal device and another one terminal device participate, a group communication session in which terminal devices belonging to a preset group participate, In addition, an entire communication session in which all of the plurality of terminal devices that can communicate may participate as appropriate.
- the priority storage unit may store priority information of each form of communication session.
- control unit and the first means may cancel the communication session when no audio signal is received from any terminal device participating in the communication session for a predetermined time.
- control unit and the first means remove the existing communication session from the existing communication session if the canceled communication session is a new communication session and the existing communication session has not been canceled yet.
- the terminated terminal device may rejoin the existing communication session.
- the voice communication system of the present invention includes the relay device and a plurality of terminal devices that communicate with each other via a communication network.
- a terminal device is a terminal network communication unit that communicates with a relay device via a communication network, and a terminal that transmits an audio signal to which information specifying a communication partner terminal device is attached to the relay device using the terminal network communication unit And a control unit.
- the terminal device further includes a push-to-talk (PTT) circuit, and the terminal network communication unit transmits a voice signal to the relay device while the PTT switch is on, regardless of whether the PTT circuit is on / off.
- the voice signal sent from the relay device may be received.
- PTT push-to-talk
- the network may have a plurality of access points of a wireless local area network (LAN), and the terminal network communication unit of the terminal device may be connected to the network via any access point.
- LAN wireless local area network
- the communication priority and management of communication between the terminal devices are performed on the relay device side, It is possible to immediately switch to high priority communication at once on the relay device side.
- FIG. 1 is a configuration diagram of a voice communication system according to an embodiment of the present invention.
- FIG. 2 is a block diagram of a transceiver that is a terminal device.
- FIG. 3 is a diagram illustrating an example of the configuration of a voice packet.
- FIG. 4 is a block diagram of the server device.
- FIG. 5A is a diagram illustrating a terminal table set in the server apparatus.
- FIG. 5B is a diagram illustrating a group table set in the server apparatus.
- FIG. 5C is a diagram illustrating a mixing table set in the server apparatus.
- FIG. 5D is a diagram illustrating a priority table set in the server apparatus.
- FIG. 6A is a diagram illustrating a mixing table set in the server apparatus.
- FIG. 6B is a diagram illustrating a mixing table set in the server apparatus.
- FIG. 6C is a diagram illustrating a mixing table set in the server apparatus.
- FIG. 6D is a diagram illustrating a mixing table set in the server apparatus.
- FIG. 6E is a diagram illustrating a mixing table set in the server apparatus.
- FIG. 7 is a flowchart showing the operation of the transceiver.
- FIG. 8A is a flowchart showing the operation of the server apparatus.
- FIG. 8B is a flowchart showing the operation of the server apparatus.
- FIG. 9 is a flowchart showing a registration process executed by the server apparatus.
- FIG. 1 is a configuration diagram of a voice communication system according to an embodiment of the present invention.
- a plurality of terminal apparatuses 14 communicate with each other using a wireless LAN (local area network) 16 such as Wi-Fi.
- the terminal device 14 has a shape similar to a handy transceiver for wireless communication, and includes a PTT (push-to-talk) switch 220 as shown in FIG.
- the terminal device 14 is a wireless network device that transmits and receives voice packets via the wireless access point (AP) 13.
- the server device 11 serving as a relay device relays mutual communication via the wired network 15 and the wireless LAN 16 of the plurality of terminal devices 14.
- the wired network 15 and the wireless LAN 16 are collectively referred to as a network 17.
- the terminal device 14 can execute communication in the form of individual communication, group communication, and overall communication (overall call) via the server device 11.
- a communication partner another terminal device 14
- group communication communication is performed with terminal devices 14 belonging to a preset group.
- overall communication communication is performed with all communicable terminal devices 14 connected to the network 17.
- the user operates his / her terminal device 14 to select a desired form from these communication forms.
- the server device 11 establishes any one of the communication sessions in response to a call from the terminal device 14.
- priority is set for each type of communication session. Even if the terminal device 14 is participating in a certain communication session, when a communication session including its own device with a higher priority is established, the participating communication session is switched to the communication session with the higher priority. Details will be described later.
- the server device 11 transmits setting data to the terminal device 14 and sets up the terminal device 14 in a communicable state.
- the setting data transmitted by the server device 11 is, for example, a terminal number or an update program with which the terminal device 14 can communicate.
- an Ethernet (registered trademark) LAN or the Internet can be used.
- the wired network 15 includes the Internet, secure communication is possible by using a VPN (Virtual Private Network).
- a communication method compliant with IEEE 802.11 such as Wi-Fi can be applied.
- the terminal device 14 and the wireless access point 13 communicate using this wireless LAN 16 communication method.
- a plurality of wireless access points 13 are installed. Each wireless access point 13 is installed, for example, on a different floor or different room of a building. Thereby, it is possible to estimate which floor / room the terminal device 14 is in, depending on which wireless access point 13 the terminal device 14 is under.
- a management device 12 is connected to the wired network 15.
- the management device 12 is composed of a personal computer in which a management program is installed.
- the management device 12 accesses the server device 11 according to the operation of the administrator, and sets the tables shown in FIGS. 5A and 5B in the server device 11.
- the management device 12 also functions as a single terminal device and can communicate with other terminal devices 14.
- FIG. 2 is a block diagram of the terminal device 14.
- the terminal device 14 is a wireless network device that transmits and receives voice packets via the wireless LAN wireless access point (AP) 13.
- the control unit 20 controls the operation of the terminal device 14 and is configured by a microprocessor.
- the control unit 20 has a storage unit 21 in which various data are stored.
- the storage unit 21 stores setting data downloaded from the server device 11.
- An operation unit 22, a display unit 23, an audio circuit 24, and a wireless LAN communication unit 25 are connected to the control unit 20.
- the operation unit 22 includes a key switch such as a PTT switch 220, receives a user operation, and inputs an operation signal to the control unit 20.
- the display unit 23 includes a liquid crystal display. On the liquid crystal display, the identification number of the communication partner selected by the user's operation, the identification number of the incoming communication partner, and the like are displayed.
- the audio circuit 24 has a microphone 240 and a speaker 241.
- the control unit 20 decodes the received voice packet and inputs it to the audio circuit 24.
- the audio circuit converts the decoded audio signal into an analog signal and outputs it from the speaker 241.
- the audio circuit 24 converts the audio signal input from the microphone 240 into a digital signal and inputs the digital signal to the control unit 20.
- the control unit 20 converts the digital audio signal into a voice packet and inputs the voice packet to the wireless LAN communication unit 25.
- the wireless LAN communication unit 25 includes a circuit that performs wireless communication using a communication method compliant with IEEE802.11.
- the wireless LAN communication unit 25 transmits the packet input from the control unit 20 to the wireless access point 13 and inputs the packet received from the wireless access point 13 to the control unit 20.
- the terminal device 14 edits the voice signal into a voice packet and transmits the voice packet toward the server device 11.
- the voice packet has a configuration as shown in FIG.
- the header of the voice packet includes a destination IP address (destination address) and a source address (sender address).
- the data body includes a transfer destination terminal number and a transmission source terminal number together with a digitized audio signal.
- the transfer destination terminal number is an identification number of the communication partner (target device).
- the identification number of the communication partner is a terminal number (individual communication), a group number (group communication), or an overall number (overall communication).
- the destination of the voice packet transmitted from the terminal device 14 is the server device 11, but the final destination of the voice signal is the terminal device 14 of the communication partner.
- the server apparatus 11 extracts the data body from the voice packet and transfers the voice signal (voice packet) to the terminal apparatus 14 of the communication partner.
- the identification number of the communication partner is the group number and the whole number
- the voice signal is transferred to a plurality of terminal devices 14 which are communication partners. That is, in the case of group communication, an audio signal is transferred to a plurality of terminal devices 14 belonging to the group. Further, in the case of overall communication (overall number), the audio signal is transferred to all terminal devices 14 capable of communication.
- a new voice packet is created with the IP address of the transfer destination terminal device 14 as the transmission destination address and the IP address of the server 11 as the transmission source address.
- the transfer destination terminal number included in the data body of the new packet is the same as that of the voice packet received by the server device 11.
- the transmission source terminal number may be cleared, or the same one as that of the voice packet received by the server device 11 may be attached.
- the terminal device 14 when the PTT switch 220 is turned on, the terminal device 14 adds the identification number of the communication partner to the voice signal input from the microphone 240 without performing the communication establishment procedure such as the SIP procedure.
- the transmitted voice packet is transmitted to the server device 11.
- the server apparatus 11 transfers the audio signal to the communication partner identified by the identification number.
- communication is started by sending a voice packet (RTP packet). Therefore, when the user turns on the PTT switch 220, the user can start communication almost simultaneously. Communication can be performed with a feeling of use similar to that of a transceiver. In order to realize such a feeling of use, the server device 11 performs management of the IP address and group of each terminal device 14 and transfer of audio signals.
- the terminal device 14 has a VOX circuit together with the PTT switch 220.
- the VOX circuit determines whether or not a call voice (voice signal) has been input based on the input level of the microphone 240 and its duration, and if it is determined that the call voice has been input, the device is in a transmission state (PTT). This is a circuit for switching to (switch-on).
- the terminal device 14 may perform transmission on / off switching using a VOX circuit instead of the PTT switch 220 or together with the PTT switch 220.
- a general wireless communication transceiver is a simplex system that cannot receive a wireless signal in a transmission state.
- the terminal device 14 since the terminal device 14 transmits and receives voice signals through voice packet communication via the wireless LAN 16, it can transmit voice packets and receive voice packets in parallel. Using this function, the terminal device 14 can perform full-duplex communication that simultaneously transmits and receives an audio signal. However, even when the terminal device 14 performs full-duplex communication, when the call voice to be transmitted is input by the PTT switch 220 or the VOX function so that the silent voice packet is not continuously transmitted. Only edit / send voice packets.
- the server device 11 transfers the voice signal included in the voice packet received from the terminal device 14 via the network 17 to the terminal device 14 of the communication partner via the network 17.
- an audio signal is transferred to a plurality of terminal devices 14 belonging to the group.
- a plurality of users may speak at the same time, and audio signals may be transmitted from a plurality of terminal devices 14 at the same time.
- the server device 11 mixes the plurality of audio signals, edits a new audio signal, and transfers the new audio signal as an audio packet to each terminal device 14. The mixing is performed for each terminal device 14 so that the audio signal transmitted by the own device is not included in the mixing audio and returned.
- the terminal device 14 that has not transmitted the audio signal is transferred by mixing all the received audio signals, and the terminal device 14 that has transmitted the audio signal has the terminal device 14
- the transmitted audio signal is removed, and other audio signals are mixed and transferred.
- the terminal device 14 that transmitted the audio signal does not cause echo of the audio signal transmitted by the own device.
- FIG. 4 is a block diagram of the server device 11.
- the server device 11 includes a control unit 30, a storage unit 31, and a network communication unit 32.
- the storage unit 31 is composed of, for example, a hard disk or a RAM, and stores various tables shown in FIG. 5, setting data of each terminal device 14, and the like.
- the control unit 30 performs setup of the terminal device 14, mixing of audio signals, and the like.
- the network communication unit 32 controls communication with the wired network 15.
- FIG. 5A, 5B, 5C, and 5D are diagrams showing tables provided in the storage unit 31 of the server device 11.
- FIG. 5A, 5B, 5C, and 5D are diagrams showing tables provided in the storage unit 31 of the server device 11.
- FIG. 5A is a diagram showing the terminal table 301.
- the terminal table 301 is a table for the server device 11 to manage the terminal device 14. Each terminal device 14 is identified by an identification number (terminal number) assigned uniquely.
- the terminal table 301 stores an active flag and a setting data storage address for each terminal number.
- the active flag indicates that the terminal device 14 is connected to the network 17 and accesses the server device 11 to receive registration and download of various data by the server device 11, that is, communication is completed after registration is completed. It is a flag to show.
- the active flag is set when the server device 11 completes registration of the terminal device 14.
- the setting data is, for example, program update data (firmware), a group to which the user belongs, a telephone book that records other groups that are allowed to communicate.
- the server device 11 When the terminal device 14 is connected to the network 17, the server device 11 communicates with the terminal device 14 and registers the terminal device 14. Further, the server device 11 communicates with the terminal device 14 at an appropriate timing thereafter, and updates the registration of the terminal device 14.
- the appropriate timing thereafter is, for example, when the connected wireless access point 13 is switched at regular intervals.
- the terminal device 14 When the user selects a communication partner, the terminal device 14 is operated to display the candidate number of the communication partner on the display unit 23.
- the number of the communication partner candidate is the terminal number of the above-described active terminal device 14 or the group number for which communication is permitted.
- FIG. 5B is a diagram showing the group table 302.
- the group table 302 is a table for the server device 11 to manage groups. Each group is identified by an identification number (group number) uniquely assigned.
- the group table 302 stores, for each group, the group number and the terminal number of the terminal device 14 (affiliated terminal device) belonging to the group.
- the number of terminal devices 14 belonging to the group may be one or more.
- the terminal table 301 and the group table 302 are set in the server device 11 when the administrator operates the management device 12.
- FIG. 5C is a diagram showing a mixing table (session table) 303.
- the mixing table 303 is a table for the server apparatus 11 to manage communication sessions.
- a communication session is a communication state between a plurality of terminal devices 14 using the server device 11 as a relay device.
- the mixing table 303 has a plurality of rows, and information on one communication session is stored in each row.
- the server apparatus 11 receives an audio signal (audio packet) from the terminal apparatus 14, the server apparatus 11 refers to the mixing table 303 and determines which communication session the audio signal belongs to.
- the communication session is processed, for example, according to the following procedure.
- the establishment of the communication session that is, the setting of the mixing table 303 is performed when the first calling voice packet for establishing the communication session is received from the terminal device 14.
- a single speech for example, several seconds
- short (20 milliseconds in this embodiment)
- a reply utterance voice for a certain utterance voice is transmitted from another terminal device.
- the interval (silent time) between the previous utterance voice and the reply utterance voice is about 0 to several seconds.
- the communication session holding time is set to be equal to or greater than the maximum silent time in general communication.
- the basic communication session procedure described above is common to all forms of individual communication, group communication, and overall communication, but the setting procedure of the mixing table 303 is different for each communication form.
- the mixing table 303 includes items of a session number, a calling terminal number, a participating terminal number, an added terminal number, an excluded terminal number, and a remaining holding time (T1) for each communication session.
- the session number is a number that identifies this communication session.
- the calling terminal number is the terminal number of the terminal device 14 (calling terminal device) that has transmitted the first voice packet (calling voice packet) of this communication session.
- the session number may be a unique value for each communication session. In this embodiment, the transfer destination terminal number written in the call voice packet is used.
- a communication session in which a terminal number (for example, “19”) is registered as a session number is an individual communication session (individual communication session). Individual communication is communication between one-to-one individual terminal devices 14.
- a communication session in which a group number (for example, “G1”) is registered as a session number is a group communication communication session (group communication session).
- Group communication is communication in which a plurality of terminal devices 14 (generally three or more) exchange voice signals with each other.
- a communication session in which an entire number (for example, “A”: see FIG. 6C) is registered as a session number is a communication session (overall communication session) of overall communication.
- the overall communication is communication in which all communicable terminal devices 14 connected to the network 17 exchange audio signals with each other.
- the participating terminal number is a list of terminal numbers of the terminal devices 14 participating in the communication session.
- the control unit 30 registers the voice signal of this voice packet, and the terminal number is registered in the participating terminal number. It transfers to the other terminal device 14, and implement
- the participating terminal number is the terminal number of the calling terminal device and the terminal number of the terminal device 14 belonging to the group designated as the communication partner.
- the terminal numbers of those terminal devices 14 are the participating terminals. Excluded from the number (registered in the excluded device number field).
- the calling terminal device is a terminal device 14 that does not belong to this group, that is, when the terminal device 14 calls a group other than the group to which the own station belongs, the terminal number of the terminal device 14 Is also registered as a participating terminal number.
- the terminal number is also registered in the additional terminal number column. That is, in this group communication session, the calling terminal device is assumed to be a terminal device 14 (participating terminal device) that does not belong to the group and participates in the communication session in the same manner as the terminal device 14 that belongs to the group. Be treated.
- the participating terminal number is the terminal number of the calling terminal device and the terminal numbers of all the terminal devices 14 that can communicate.
- the excluded terminal number is the same as the group communication described above. Further, the additional terminal number is not registered.
- the terminal number of the calling terminal device and the terminal number of the communication partner terminal device 14 are registered as participating terminal numbers. Since the communication is one-to-one, the additional terminal number and the excluded terminal number are not registered.
- the additional terminal number and excluded terminal number columns are not essential.
- the table can be managed only by adding or excluding the terminal number to the participation terminal number column.
- the holding time is a time for holding this communication session without canceling it in a state where no voice packet is transmitted from the participating terminal devices.
- the holding time of each communication session in the server device 11 is set to 30 seconds, for example.
- the holding time timer (TS) of the mixing table 303 is a timer that counts the lapse of the holding time when no voice packet is transmitted.
- the holding time timer TS is counted down if no voice packet is transmitted in the process of the control unit 30 (see FIG. 7), and is reset to 30 seconds if a voice packet is transmitted.
- the timer TS times out because no voice packet is sent from the participating terminal device for 30 seconds, the communication session is canceled and information on the communication session is deleted from the mixing table 303.
- the calling terminal device is additionally registered in the item of the participating terminal device of the mixing table 303 other than the affiliated terminal device, and the inactive terminal device 14 even if it is the affiliated terminal device.
- the terminal device 14 performing another communication session is excluded.
- the terminal device 14 additionally registered in the item of the participating terminal device and the excluded terminal device 14 are not limited to these.
- the terminal device 14 participating in a communication session with a low priority starts another communication session with a high priority (for example, an individual communication session) on the way, the priority is low at that point. Excluded from terminal devices participating in the communication session. That is, the terminal number of the terminal device 14 moves from the participating terminal number column to the excluded terminal number column.
- 5 seconds elapses after the PTT switch 220 is turned off, the user can start another communication session by a predetermined operation even if the communication session is maintained in the server device 11.
- the mixing table 303 may be divided into two tables including an ongoing mixing table and a save table.
- the ongoing mixing table is a table in which sessions that are currently being mixed are registered, and is formed on a high-speed memory.
- the session in which communication (voice packet transmission / reception) is interrupted is transferred to the save table in a short time of about 200 milliseconds, and is held in the save table for the holding time (T1).
- T1 holding time
- FIG. 5D is a diagram illustrating the priority table 304.
- the priority table 304 stores communication priorities in association with the form (call type) of each communication session. The priority is represented by a numerical value, for example, and the smaller the value, the higher the priority.
- the server apparatus 11 determines whether or not to switch the current communication session of the terminal apparatus 14 to a new communication session when there is a request for establishing a new communication session for the terminal apparatus 14 in the communication session. Used to judge. That is, when the priority of the new communication session is higher than the priority of the current communication session, the communication session of the terminal device 14 is switched to a new communication session with a higher priority.
- This priority table is also set by an administrator who operates the management apparatus 12. Hereinafter, a description will be given using the example of the mixing table 303 shown in FIGS. 6A, 6B, and 6C.
- the terminal device 14 with the terminal number “20” can communicate with the terminal device 14 with the terminal number “4”.
- a case where the request (call voice packet) is transmitted to the server device 11 will be described.
- the terminal device 14 with the terminal number “4” is participating in the group communication session as shown in FIG. 6A.
- the server device 11 refers to the priority table 304 and sets the priority “3” of the current group communication session and the priority “2” of the new individual communication session to the terminal device 14 with the terminal number “4”.
- the server device 11 determines that the new communication session (individual communication session) has a higher priority, and changes the communication session of the terminal device 14 with the terminal number “4” from the group communication session to the individual communication session. Switch. Thereby, as shown in FIG. 6B, a new communication session having the terminal number “4” as the session number is registered in the mixing table 303. Then, in the group communication session with the session number “G1”, the terminal number “4” registered in the participating terminal item is moved to the excluded terminal item.
- the terminal device 14 having the terminal number “10” makes a request for the entire communication session (call voice packet). Is transmitted to the server device 11. Since all terminal devices 14 that can communicate are targeted for the entire communication session, all terminal devices 14 that are participating in the group communication session with the session number “G1” are also targeted for this entire communication. Therefore, the server device 11 refers to the priority table and performs the current group communication with the terminal devices 14 with the terminal numbers “1”, “2”, “3”, “4”, “5”, “23”. The priority “3” of the session is compared with the priority “1” of the new entire communication session.
- the server device 11 determines that the priority of the overall communication session is higher, and switches the communication session of the terminal device 14 from the group communication session to the overall communication session. That is, as shown in FIG. 6C, a new communication session having the terminal number “A (overall number)” as the session number is registered in the mixing table 303. Then, the registration of the group communication session with the session number “G1” is canceled because all the participating terminals are switched to the overall communication session (the group communication session ends). Note that the terminal device 14 with the terminal number “100” that is not in the active state (active flag: OFF) cannot be communicated, and is thus registered as an excluded terminal.
- the terminal device 14 with the terminal number “5” requests the group communication session with the group number “G1”.
- a case where (call voice packet) is transmitted to the server device 11 will be described.
- the terminal device 14 having the terminal number “1” included in the group “G1” is participating in the individual communication session as illustrated in FIG. 6D. Therefore, the server device 11 refers to the priority table, and sets the current individual communication session priority “2” and the new group communication session priority “3” to the terminal device 14 with the terminal number “1”.
- the server device 11 determines that the individual communication session has a higher priority, and maintains the current individual communication session of the terminal device 14 with the terminal number “1”. Further, since the terminal device 14 (terminal numbers “2”, “3”, “4”), which is another communication partner of the group communication session, can communicate (not in another communication session), the group communication Session is possible. Therefore, as shown in FIG. 6E, a new communication session with session number “G1” with terminal number “1” as an excluded terminal is registered.
- the priority in the priority table 304 is not particularly limited to this, and the individual communication session may be set to the priority 1.
- FIG. 7 is a flowchart showing a communication control process executed by the control unit 20 of the terminal device 14. This process is repeatedly executed every 20 milliseconds.
- the current communication state (status) is determined in response to ON / OFF of the PTT switch 220 and reception of a voice packet (RTP packet).
- RTP packet voice packet
- PTT An abbreviation for push-to-talk switch (PTT switch) 220, but is not limited to ON / OFF of the PTT switch 220, and includes ON / OFF of a transmission signal by a VOX circuit.
- NC0 Identification number (individual number / group number / overall number) of the communication partner selected by the user's operation
- NC1 A session number, a number for identifying an ongoing communication session, and an identification number (individual number / group number / overall number) of a communication partner written in the first voice packet with which the communication session is established are used.
- FC Communication session flag (a flag indicating that this terminal device 14 is participating in a communication session)
- FT Communication flag (flag indicating that a voice packet is being transmitted or received)
- T1 Holding time timer (timer for measuring the holding time (5 seconds) of the communication session)
- S10 to S20 are voice packet transmission management processes.
- the control unit 20 determines the state of the PTT switch 220 (S10). When the PTT switch 220 is on, the control unit 20 advances the process to S11. If the PTT switch 220 is not turned on, the process proceeds to S20. In the description of this flowchart, it is assumed that turning on the PTT switch includes turning on the transmission function by VOX.
- the control unit 20 determines whether or not the communication session flag FC is set.
- the voice packet created by turning on the current PTT switch 220 is a calling voice packet.
- the control unit 20 sets a communication session flag FC and a communication flag FT indicating that a voice packet is being transmitted / received (S12).
- the control unit 20 transfers the communication partner number NC0 selected by the user to the communication session number NC1 (S13), and transmits the voice packet in which the communication session number NC1 is written in the data body together with the voice signal to the server apparatus 11. (S14).
- the server apparatus 11 starts a communication session.
- the control unit 20 resets the holding time timer T1 to 5 seconds (S15), and then proceeds to a voice packet reception management process of S30 and subsequent steps.
- the control unit 20 determines whether the communication flag FT is set, that is, whether a voice packet is currently being transmitted or received. Is determined (S16). When the communication flag FT is not set (NO in S16), the control unit 20 sets the communication flag FT (S17). The process proceeds from S11 to S16 to S17 in a case where transmission of a new voice packet (user call voice) is started in a state where the already started communication session is maintained. In S18, the already started communication session is continued and the current voice packet is returned to the communication session (NO in S18), or the previous communication session is left and the new communication partner is notified this time. To determine whether to establish another new communication session (YES in S18).
- a new voice packet user call voice
- This determination may be made according to, for example, whether or not an operation by the user immediately before the current PTT switch 220 is turned on, for example, an operation for selecting a communication partner is performed.
- an operation for selecting a communication partner is performed.
- a process of establishing a new communication session for the selected communication partner may be performed in the process of S19.
- the determination process of S18 may be executed so that the communication session immediately before the switching is restored.
- a re-communication operation can be performed from the operation unit 22 of the terminal device 14, and a switching process for returning to the immediately previous communication session by the user performing the re-communication operation may be performed.
- the terminal device 14 detects that a re-communication operation has been performed and determines that the communication session is to be updated (YES in S18).
- the terminal device 14 detects that the re-communication operation has been performed, and sends a request signal for returning to the previous communication session to the server device 11 by adding it to the voice packet.
- voice packet may be made to perform the process which returns to the last communication session.
- control unit 20 When updating the communication session (YES in S18), the control unit 20 transfers the communication partner number NC0 selected at that time to the communication session number NC1 (S19), and advances the process to S14.
- control unit 20 advances the process from S18 to S14.
- the control unit 20 resets the communication flag FT (S20). Note that if the communication flag FT has already been reset, it may be left as it is. After that, the control unit 20 advances the processing to the reception management processing of voice packets after S30.
- the control unit 20 determines whether or not a voice packet is received via the network 17 in S30. When receiving the voice packet, the control unit 20 advances the process to S31. If no voice packet has been received, the process proceeds to S40.
- the control unit 20 determines whether or not the communication session flag FC is set. If the communication session flag FC is not set (NO in S31), it is determined that a new communication session has been established this time and the first voice packet has been transmitted, and the communication session flag FC and the communication flag FT are set. (S32).
- the FT flag is a flag indicating that a voice packet is currently being transmitted / received.
- the control unit 20 transcribes the communication partner number included in the voice packet to the communication session number NC1 (S33).
- the control unit 20 outputs the voice packet to the audio circuit 24 (S34), and resets the holding time timer T1 to 5 seconds (S35).
- the control unit 20 determines whether or not the communication session number included in the current voice packet is the same as the communication session number NC1. (S36). If they are the same (YES in S36), the control unit 20 sets the communication flag FT in response to the reception of the current voice packet (S38). If the communication flag FT has already been set, it can be left as it is. Thereafter, the control unit 20 advances the process to S34.
- control unit 20 transfers the communication session number included in the current voice packet to the communication session number NC1 (S37) and advances the process to S38. .
- the process proceeds from S36 to S37 in a situation where the communication session switching based on the priority by the server apparatus 11 has been performed.
- control unit 20 determines whether or not the communication session flag FC is set (S40). When the communication session flag FC is set (YES in S40), the control unit 20 executes the processing from S41 onward. When the communication session flag FC is not set (NO in S40), the control unit 20 ends the process as it is.
- the control unit 20 determines whether or not the communication flag FT is set. If the communication flag FC is set (YES in S41), the control unit 20 ends the process as it is.
- the control unit 20 sets the holding time timer T1. One count (20 milliseconds) is subtracted (S42). Then, it is determined whether or not the holding time timer T1 has become 0 by this subtraction (S43). When the holding time timer T1 becomes 0 (YES in S43), the control unit 20 resets the communication session flag FC in order to cancel the communication session (S44). In S43, when the holding time timer T1 is still larger than 0 (NO in S43), the control unit 20 ends the process as it is.
- FIG. 8A and 8B are flowcharts showing the operation of the server device 11.
- FIG. 8A shows processing when a voice packet is received.
- FIG. 8B shows the mixing table management process.
- the control unit 30 when receiving the voice packet, determines whether the communication session identified by the source terminal number and the communication partner number is already registered in the mixing table 303 (S50). When the communication session is already registered in the mixing table 303 (YES in S50), the control unit 30 joins the voice signal included in the received voice packet to the communication session based on the participating terminal number in the mixing table 303. The data is transferred to the terminal device 14 that is currently connected (S56). Then, the communication session holding time timer TS in the mixing table 303 is reset to 30 seconds (S57).
- FIG. 9 is a flowchart showing a registration process executed by the server device 11. This process is executed in S51 of FIG. 8A. From the session number (individual number / group number / whole number) included in the received call voice packet, the control unit 30 determines 1 of the candidate terminal devices 14 (terminal device numbers) that are participating terminals in this new communication session. Is selected (S70). Next, the control unit 30 determines whether or not the terminal device 14 is currently in a communication session (S71). Specifically, it is determined by whether or not the communication session registered in the mixing table 303 is included in the participating terminals.
- the control unit 30 determines the terminal device 14 as a participation terminal of a new communication session (S72), and advances the process to S75.
- the control unit 30 determines whether or not the priority of the new communication session is higher than the current communication session of the terminal device 14 (S73). .
- the control unit 30 advances the process to S72, and determines this terminal device 14 as a participating terminal of the new communication session.
- the control unit 30 determines this terminal device 14 as a new communication session exclusion terminal (S74), and proceeds to S75. . Then, the control unit 30 repeatedly executes the above processing until the processing of S70 to S74 is executed for all the candidate terminal devices 14 that are to be participating terminals of the new communication session (YES in S75). .
- the control unit 30 determines the presence or absence of the terminal device 14 determined as a participating terminal (S76). When there is a terminal device 14 as a participating terminal (YES in S76), the control unit 30 registers this new communication session in the mixing table 303 (S77), and ends this process.
- the communication partner number (communication session number) of the calling voice packet is registered as the session number, and the terminal number of the terminal device 14 that is the source of the calling voice packet is registered as the calling terminal number.
- the participating terminal number the number of the terminal device 14 and the calling terminal number determined as the participating terminal are registered.
- the control unit 30 determines that a new communication session is not established and does not register the new communication session in the mixing table 303. The registration process ends.
- control unit 30 returns to FIG. 8A and advances the process to S52.
- the control unit 30 determines whether or not the new communication session is registered in the mixing table. If not registered in the mixing table (NO in S52), the control unit 30 determines that a new communication session has not been established, and ends the process when receiving the voice packet. On the other hand, if registered in the mixing table in S52 (YES in S52), the control unit 30 uses the voice signal of the received voice packet to participate in the communication session based on the participating terminal number in the mixing table 303. Transfer to the device 14 (S53).
- the control unit 30 determines whether there is a communication session established this time that is excluded from the terminal devices participating in the communication session already registered in the mixing table 303 (S54). That is, when the terminal device 14 that has participated in the communication session established earlier based on the priority or the like is to participate in the new communication session established this time, the communication session established earlier Need to deviate from.
- the control unit 30 updates another communication session (S55). Specifically, the terminal number of this terminal device 14 is deleted from the field of the participation terminal number of the communication session established previously. The excluded terminal number is transcribed in the excluded terminal number column.
- the communication session is deleted. In this way, the terminal devices participating in the communication session are optimized. If there is nothing excluded from the participating terminal devices of the communication session already registered in the mixing table 303 in S54 (NO in S54), the processing at the time of receiving this voice packet is terminated.
- the mixing table management process in FIG. 8B is repeatedly executed periodically (for example, every 20 milliseconds).
- the control unit 30 first designates the communication session in the first row of the mixing table 303 (S60).
- the control unit 30 subtracts 1 count (20 milliseconds) from the holding time timer TS of the designated communication session (S61), and determines whether or not the holding time timer TS has become 0 by this subtraction (S62). .
- the control unit 30 deletes the communication session of this row, assuming that this communication session is ended (S63).
- the control unit 30 manages the mixing table 303 by sequentially performing the above processing until it reaches the last row of the mixing table 303 (S64, S65).
- the terminal device 14 that has participated in the communication session may participate in another communication session halfway.
- the terminated communication session is a high-priority communication session
- the terminal device 14 that has participated in the communication session includes one that has been extracted from the previously established low-priority communication session
- the terminal device 14 may be re-participated in the original low-priority communication session (of course, only when the low-priority communication session continues).
- this priority You may make it participate in the low communication session from the middle.
- the terminal numbers of the terminal devices 14 participating in the communication session are registered in other ongoing communication session exclusion terminals. If it is registered in the excluded terminal, it can be realized by transferring this terminal number to the participating terminal.
- the relay device (server device 11) and the terminal device 14 that is a communication device are connected via a communication network, and the terminal devices 14 are connected to each other based on communication priority.
- Management of communication is performed on the server device 11 side.
- the server device 11 manages the information related to the communication priority
- the user can apply the priority desired by the user only by updating the information related to the priority of the server device 11 using the management device 12.
- priority update work is also easy.
- the communication since the communication is maintained in the same manner as another communication after the communication is switched to a communication with a higher priority, the contents to be transmitted to the communication partner can be reliably transmitted.
- priority is set for the types of communication sessions for individual communication, group communication, and overall communication, but the present invention is not particularly limited to this.
- the priority may be set for the number of the terminal device 14.
- the number of the terminal device 14 belonging to a certain department may be configured to have a higher priority than the number of the terminal apparatus 14 belonging to another department. Then, when the terminal device number having a higher priority for the new communication session is the calling terminal number, the communication session is switched to a new communication session even during another communication session.
- the communication session is switched based on the priority table.
- an emergency call operation can be performed from the operation unit 22 of the terminal device 14, and a communication session when the user performs the emergency call operation may have a high priority.
- Information indicating that the call is urgent is added to the calling voice packet when the emergency call is operated, and the server device 11 receives (stores) the additional information and determines the priority.
- the inactive terminal device is excluded from the communication session as an excluded terminal device.
- the terminal device may be joined in the communication session.
- the current communication session is immediately switched to a new communication session with a high priority, but the present invention is not limited to this. For example, if a voice packet is being transmitted in the current communication session, it may be switched to a new communication session after the end of the transmission.
- the communication session is established in response to the calling voice packet transmitted from the terminal device 14, but the trigger for establishing the communication session is not limited to this.
- the administrator may establish and cancel the session group by operating the mixing table 303 from the management device 12.
- the management apparatus 12 may establish and cancel the extended group communication between the groups described above. Even in this method, it is possible to manage the communication session comprehensively and flexibly change it.
- Server device (relay device) 12 management device 13 wireless access point 14 terminal device 20 (terminal device) control unit 30 (server device) control unit 32 network communication unit 220 PTT (push-to-talk) switch 301 terminal table 302 group table 303 mixing table 304 Priority table
Abstract
Description
NC0:ユーザの操作によって選択された通信相手の識別番号(個別番号/グループ番号/全体番号)
NC1:セッション番号、実行中の通信セッションを識別する番号、通信セッションが確立される最初の音声パケットに書き込まれていた通信相手の識別番号(個別番号/グループ番号/全体番号)が用いられる。
FC:通信セッションフラグ(この端末装置14が通信セッションに参加していることを示すフラグ)
FT:通信中フラグ(音声パケットの送信中または受信中であることを示すフラグ)
T1:保持時間タイマ(通信セッションの保持時間(5秒)を計時するタイマ)
12 管理装置
13 無線アクセスポイント
14 端末装置
20 (端末装置の)制御部
30 (サーバ装置の)制御部
32 ネットワーク通信部
220 PTT(プッシュ・トゥ・トーク)スイッチ
301 端末テーブル
302 グループテーブル
303 ミキシングテーブル
304 優先度テーブル
Claims (15)
- 通信ネットワークが接続され、該通信ネットワークを介して複数の端末装置と通信するネットワーク通信部と、
前記端末装置から呼出音声信号を受信したとき、該端末装置および該呼出音声信号で指定されている通信相手の端末装置が参加する通信セッションを確立し、該通信セッションに参加している端末装置間で相互に音声信号を転送する制御部と、
前記通信セッションに関する優先度情報を記憶する優先度情報記憶部と、
を備え、
前記制御部は、既存の通信セッションに参加している端末装置を通信相手として指定する呼出音声信号を受信したとき、前記既存の通信セッションと今回の呼出音声信号で確立されるべき新規の通信セッションとの優先度を前記優先度情報に基づいて判定する優先度判定部を含み、前記既存の通信セッションよりも前記新規の通信セッションの優先度が高い場合、前記既存の通信セッションに参加している端末装置を、該既存の通信セッションから外して、前記新規の通信セッションに参加させる
中継装置。 - 前記制御部は、
1つの端末装置および他の1つの端末装置が参加する個別通信セッション、予め設定されているグループに所属する端末装置が参加するグループ通信セッション、および、通信可能な前記複数の端末装置の全てが参加する全体通信セッションを適宜確立し、
前記優先度記憶部は、各形態の通信セッションの優先度情報を記憶する
請求項1に記載の中継装置。 - 前記制御部は、前記通信セッションに参加しているいずれの端末装置からも所定時間音声信号を受信しなかったとき、この通信セッションを解消する請求項1に記載の中継装置。
- 前記制御部は、前記解消した通信セッションが前記新規の通信セッションであり、前記既存の通信セッションがまだ解消されていない場合、前記既存の通信セッションから外された端末装置を前記既存の通信セッションに再度参加させる請求項3に記載の中継装置。
- 通信ネットワークを介して、相互に通信する中継装置および複数の端末装置を有する音声通信システムであって、
前記中継装置は、
前記通信ネットワークに接続され、該通信ネットワークを介して複数の端末装置と通信するネットワーク通信部と、
前記端末装置から呼出音声信号を受信したとき、該端末装置および該呼出音声信号で指定されている通信相手の端末装置が参加する通信セッションを確立し、該通信セッションに参加している端末装置間で相互に音声信号を転送する制御部と、
前記通信セッションに関する優先度情報を記憶する優先度情報記憶部と、
を備え、
前記第一制御部は、既存の通信セッションに参加している端末装置を通信相手として指定する呼出音声信号を受信したとき、前記既存の通信セッションと今回の呼出音声信号で確立されるべき新規の通信セッションとの優先度を前記優先度情報に基づいて判定する優先度判定部を含み、前記既存の通信セッションよりも前記新規の通信セッションの優先度が高い場合、前記既存の通信セッションに参加している端末装置を、該既存の通信セッションから外して、前記新規の通信セッションに参加させ、
前記端末装置は、
前記通信ネットワークを介して前記中継装置と通信する端末ネットワーク通信部と、
通信相手の端末装置を指定する情報が付された音声信号を前記端末ネットワーク通信部を用いて前記中継装置宛に送信する端末制御部と、
を備えた音声通信システム。 - 前記端末装置は、プッシュ・ツー・トーク回路を更に備え、
前記端末ネットワーク通信部は、前記プッシュ・ツー・トーク回路がオンされている間、前記音声信号を前記中継装置に送信し、前記プッシュ・ツー・トーク回路のオン/オフにかかわらず、前記中継装置から送られてくる音声信号を受信する
請求項5に記載の音声通信システム。 - 前記ネットワークは、無線ローカル・エリア・ネットワークのアクセスポイントを複数有し、
前記端末装置の端末ネットワーク通信部は、いずれかのアクセスポイントを介して前記ネットワークに接続する
請求項5に記載の音声通信システム。 - 複数の端末装置とネットワークを介して通信するネットワーク通信部、および、複数の端末装置による通信セッションの優先度情報を記憶する記憶部を備えた中継装置のコンピュータを、
前記端末装置から呼出音声信号を受信したとき、該端末装置および該呼出音声信号で指定されている通信相手の端末装置が参加する通信セッションを確立し、該通信セッションに参加している端末装置間で相互に音声信号を転送する第一手段として機能させ、
該第一手段は、
既存の通信セッションに参加している端末装置を通信相手として指定する呼出音声信号を受信したとき、前記既存の通信セッションと今回の呼出音声信号で確立されるべき新規の通信セッションとの優先度を前記優先度情報に基づいて判定する第二手段、および、
前記既存の通信セッションよりも前記新規の通信セッションの優先度が高い場合、前記既存の通信セッションに参加している端末装置を、該既存の通信セッションから外して、前記新規の通信セッションに参加させる第三手段、
を含むプログラム。 - 前記第一手段は、1つの端末装置および他の1つの端末装置が参加する個別通信セッション、予め設定されているグループに所属する端末装置が参加するグループ通信セッション、および、通信可能な前記複数の端末装置の全てが参加する全体通信セッションを適宜確立し、
前記記憶部は、各形態の通信セッションの優先度情報を記憶している
請求項8に記載のプログラム。 - 前記第一手段は、前記通信セッションに参加しているいずれの端末装置からも所定時間音声信号を受信しなかったとき、この通信セッションを解消する手段を含む請求項8に記載のプログラム。
- 前記第一手段は、前記解消した通信セッションが前記新規の通信セッションであり、前記既存の通信セッションがまだ解消されていない場合、前記既存の通信セッションから外された端末装置を前記既存の通信セッションに再度参加させる手段を含む請求項10に記載のプログラム。
- 複数の端末装置とネットワークを介して通信するネットワーク通信部、および、複数の端末装置による通信セッションの優先度情報を記憶する記憶部を備えた中継装置の制御部が、
前記端末装置から呼出音声信号を受信したとき、該端末装置および該呼出音声信号で指定されている通信相手の端末装置が参加する通信セッションを確立し、該通信セッションに参加している端末装置間で相互に音声信号を転送する第一手順を実行する中継方法であって、
該第一手順は、
既存の通信セッションに参加している端末装置を通信相手として指定する呼出音声信号を受信したとき、前記既存の通信セッションと今回の呼出音声信号で確立されるべき新規の通信セッションとの優先度を前記優先度情報に基づいて判定する第二手順、および、
前記既存の通信セッションよりも前記新規の通信セッションの優先度が高い場合、前記既存の通信セッションに参加している端末装置を、該既存の通信セッションから外して、前記新規の通信セッションに参加させる第三手順、
を含む中継方法。 - 前記第一手順は、1つの端末装置および他の1つの端末装置が参加する個別通信セッション、予め設定されているグループに所属する端末装置が参加するグループ通信セッション、および、通信可能な前記複数の端末装置の全てが参加する全体通信セッションを適宜確立し、
前記記憶部は、各形態の通信セッションの優先度情報を記憶している
請求項12に記載の中継方法。 - 前記第一手順は、前記通信セッションに参加しているいずれの端末装置からも所定時間音声信号を受信しなかったとき、この通信セッションを解消する手順を含む請求項12に記載の中継方法。
- 前記第一手順は、前記解消した通信セッションが前記新規の通信セッションであり、前記既存の通信セッションがまだ解消されていない場合、前記既存の通信セッションから外された端末装置を前記既存の通信セッションに再度参加させる手順を含む請求項14に記載の中継方法。
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US10200539B2 (en) | 2019-02-05 |
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