JP6636313B2 - Management server, communication system, control method, call control information providing method, and computer program - Google Patents

Description

  The present invention relates to a technology of a call service between users.

  2. Description of the Related Art In recent years, a technology for realizing a call between a plurality of users via a network (hereinafter, referred to as “inter-group call”) has been proposed (for example, see Patent Document 1). In WebRTC (WEB Real-Time Communication) disclosed in Patent Literature 1, each user who intends to make an inter-group call voluntarily accesses a server, thereby realizing an inter-group call via the server.

JP-A-2005-118478

  However, some technologies for implementing inter-group communication do not provide a mechanism for making and receiving calls. In such a technique, information necessary for starting a call between users in advance using a communication means different from the inter-group call before starting the inter-group call (hereinafter, referred to as “call control information”). Needed to keep in touch about. Such a problem is not limited to the inter-group communication, and there is a similar problem in a communication between one-to-one users (hereinafter, referred to as “P2P communication”).

  In view of the above circumstances, an object of the present invention is to provide a technology that allows a user to start a call more easily.

  One embodiment of the present invention provides, for each user, identification information in which first identification information indicating the user is associated with second identification information that is identification information indicating the user and is different from the first identification information. A table storage unit that stores a table, from a user terminal of a user who intends to start a call with another user, first identification information indicating the other user, and call control information required to start the call, Receiving the second identification information stored in association with the first identification information in the identification information table, for a notification server that notifies the user terminal indicated by the second identification information, A notification control unit that instructs the user terminal of the user indicated by the acquired second identification information to notify the call control information.

  One embodiment of the present invention is the above management server, wherein the call control information is identification information that uniquely indicates a call to be started in a call server that provides a call service to a user of the user terminal. It is.

  One embodiment of the present invention provides, for each user, identification information in which first identification information indicating the user is associated with second identification information that is identification information indicating the user and is different from the first identification information. A table storage unit that stores a table, from a user terminal of a user who intends to start a call with another user, first identification information indicating the other user, and call control information required to start the call, Receiving the second identification information stored in the identification information table in association with the first identification information, based on the second identification information acquired by the notification control unit And a notifying unit that notifies the user terminal of the user indicated by the second identification information of the call control information.

  One embodiment of the present invention provides, for each user, identification information in which first identification information indicating the user is associated with second identification information that is identification information indicating the user and is different from the first identification information. Referencing a table, receiving, from a user terminal of a user who intends to start a call with another user, first identification information indicating the other user and call control information required for starting the call And the step of obtaining the second identification information stored in the identification information table in association with the first identification information, and a notification server that notifies the user terminal indicated by the second identification information And instructing the user terminal of the user indicated by the acquired second identification information to notify the call control information.

  One embodiment of the present invention provides, for each user, identification information in which first identification information indicating the user is associated with second identification information that is identification information indicating the user and is different from the first identification information. Referencing a table, receiving, from a user terminal of a user who intends to start a call with another user, first identification information indicating the other user and call control information required for starting the call And the step of acquiring the second identification information stored in the identification information table in association with the first identification information, based on the acquired second identification information, And notifying the user terminal of the user of the call control information indicated by the call control information.

  One embodiment of the present invention is a computer program for causing a computer to function as the above management server.

  One embodiment of the present invention is a computer program for causing a computer to function as the above communication system.

  According to the present invention, a call can be started more easily.

FIG. 1 is a system configuration diagram illustrating a system configuration of a communication system 100 according to a first embodiment. FIG. 2 is a schematic block diagram illustrating an example of a functional configuration of a first user terminal 10. FIG. 3 is a schematic block diagram illustrating an example of a functional configuration of a management server 50 according to the first embodiment. FIG. 4 is a diagram illustrating a specific example of an identification information table. 6 is a sequence chart illustrating a specific example of an operation of the communication system 100 according to the first embodiment. FIG. 9 is a system configuration diagram illustrating a system configuration of a communication system 100a according to a second embodiment. FIG. 13 is a schematic block diagram illustrating an example of a functional configuration of a management server 50a according to the second embodiment. It is a sequence chart which shows the example of operation of communication system 100a in a second embodiment.

[First embodiment]
FIG. 1 is a system configuration diagram illustrating a system configuration of the communication system 100 according to the first embodiment. The communication system 100 includes a plurality of user terminals, a call server 40, a management server 50, and a notification server 60. In the example of FIG. 1, three user terminals are illustrated as specific examples of the plurality of user terminals. Specifically, there are a first user terminal 10, a second user terminal 20, and a third user terminal 30 as specific examples of the plurality of user terminals. The plurality of user terminals function as user terminals in the communication system 100, for example, by installing an application provided in advance. The plurality of user terminals, the call server 40, the management server 50, and the notification server 60 are communicably connected via a network 70. Note that the number of networks to which each user terminal is connected does not necessarily need to be one. For example, the network to which the first user terminal 10 is connected, the network to which the second user terminal 20 is connected, and the network to which the third user terminal 30 is connected may be different.

  FIG. 2 is a schematic block diagram illustrating an example of a functional configuration of the first user terminal 10. The first user terminal 10 includes a communication unit 101, an input unit 102, a display unit 103, a voice input unit 104, a voice output unit 105, and a control unit 106. Note that all or a part of each function of the control unit 106 may be realized using hardware such as an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array).

  The communication unit 101 is a network interface. The communication unit 101 communicates with the call server 40, the management server 50, the notification server 60, and other user terminals (the second user terminal 20 and the third user terminal 30) via the network 70. The communication unit 101 passes the received data to the control unit 106. When receiving the data addressed to another device from the control unit 106, the communication unit 101 transmits the data to the destination device via the network 70.

  The input unit 102 is configured using an existing input device such as a keyboard, a pointing device (a mouse, a tablet, or the like), a button, a touch panel, or the like. The input unit 102 is operated by the user when inputting a user's instruction to the first user terminal 10. The input unit 102 may be an interface for connecting the input device to the first user terminal 10. In this case, the input unit 102 outputs to the first user terminal 10 an input signal generated by the input device in response to a user input.

  The display unit 103 is an image display device such as a CRT (Cathode Ray Tube) display, a liquid crystal display, and an organic EL (Electro Luminescence) display. The display unit 103 displays characters and images generated by the control unit 106. The display unit 103 may be an interface for connecting the image display device to the first user terminal 10. In this case, the display unit 103 generates a video signal for displaying characters and images generated by the control unit 106, and outputs the video signal to an image display device connected to the display unit 103.

  The voice input unit 104 is a microphone (voice input device). The sound input unit 104 converts a sound wave propagating in the air into a sound signal and outputs the sound signal. The voice input unit 104 may be an interface for connecting the voice input device to the first user terminal 10. In this case, the voice input unit 104 converts the voice signal generated by the voice input device into voice data, and outputs the voice data to the first user terminal 10 to which the voice input unit 104 is connected.

  The audio output unit 105 is an audio output device such as a speaker, headphones, or earphones. The sound output unit 105 converts a sound signal into a sound wave and outputs the sound wave. The audio output unit 105 may be an interface for connecting the audio output device to the first user terminal 10. In this case, the audio output unit 105 generates an audio signal for outputting audio data, and outputs the audio signal to an audio output device connected thereto.

  The control unit 106 is configured using a CPU (Central Processing Unit) and a memory connected via a bus. The control unit 106 executes an application program installed in the first user terminal 10 in advance. The control unit 106 operates based on a user operation on the input unit 102, data received by the communication unit 101, installed application programs, and audio data input from the audio input unit 104. . The control unit 106 outputs characters and images included in the screen defined in the program to the display unit 103. The control unit 106 converts voice data input from the voice input unit 104 into call data and transmits the data to the user terminal of the call destination. The control unit 106 converts the call data received from the user terminal of the call destination into voice data, and outputs the voice data to the voice output unit 105.

  The basic configuration of the second user terminal 20 and the third user terminal 30 is the same as that of the first user terminal 10. Therefore, description of the second user terminal 20 and the third user terminal 30 is omitted. However, each user terminal does not need to be completely the same up to the hardware configuration and the like, and the hardware configuration and the OS (Operating System) may be different.

  The call server 40 is an information processing device that can communicate, such as a personal computer and a server device. The call server 40 provides a call service to each of the plurality of user terminals by executing a call program installed in advance. The call server 40 may be implemented using, for example, WebRTC. The call service provided by the call server 40 may be a P2P call or an inter-group call.

  The management server 50 is a communicable information processing device such as a personal computer and a server device. FIG. 3 is a schematic block diagram illustrating an example of a functional configuration of the management server 50. The management server 50 includes a communication unit 501, a control unit 502, and a table storage unit 503.

  The communication unit 501 is a network interface. The communication unit 501 communicates with each user terminal (the first user terminal 10, the second user terminal 20, and the third user terminal 30), the call server 40, and the notification server 60 via the network 70. The communication unit 501 passes data received from another device to the control unit 502. Upon receiving data addressed to another device from the control unit 502, the communication unit 501 transmits the data to the destination device via the network 70.

  The control unit 502 is configured using a CPU and a memory connected via a bus. The control unit 502 executes an application program installed in the management server 50 in advance. The control unit 502 operates based on data received by the communication unit 501 and a program of an installed application. The control unit 502 implements the function of the notification control unit 504.

  The table storage unit 503 is configured using a storage device such as a magnetic hard disk device or a semiconductor storage device. The table storage unit 503 stores one or more tables required for the management server 50 to function. The table storage unit 503 stores, for example, an identification information table. FIG. 4 is a diagram illustrating a specific example of the identification information table. The identification information table has a plurality of identification information records 71. The identification information record 71 has a plurality of pieces of identification information assigned to the same user. For example, the identification information record 71 has values of the first user identification information and the second user identification information. The first user identification information is identification information indicating a user of the user terminal, and is identification information used in communication with another user. A user who makes a P2P call or an inter-group call with another user can acquire the first user identification information of the other user to be called. The first user identification information may be, for example, user identification information (user name, nickname, user ID, mail address) used in a system such as SNS. The second user identification information is identification information indicating a user of the user terminal, and is identification information used as information indicating a notification destination in notification processing by the notification server 60. Generally, the second user identification information is information that is not obtained by another user who is the call destination. The second user identification information is used for identifying a user terminal to be notified by a push distribution service such as APNS (Apple (registered trademark) Push Notification Service) or GCM (Google (registered trademark) Cloud Messaging). This is identification information. Note that the identification information indicating a user may be identification information for identifying a user terminal used by the user. In the example of FIG. 4, for example, the second user identification information “exampleToken001” is registered in association with the first user identification information “user_id_000001”.

  Returning to FIG. 3, the description of the management server 50 will be continued. The notification control unit 504 receives the identification information of the call destination user and the call control information from the user terminal. When receiving the first user identification information from the user terminal as the identification information of the call destination user, the notification control unit 504 performs an ID conversion process. In the ID conversion processing, the notification control unit 504 acquires the second user identification information associated with the received first user identification information by referring to the identification information table stored in the table storage unit 503. . Using the acquired second user identification information, the notification control unit 504 instructs the notification server 60 to notify the user terminal used by the user of the call destination of the call control information.

  The notification server 60 is a communicable information processing device such as a personal computer or a server device. The notification server 60 provides a notification service to each user of a plurality of user terminals by executing a notification program installed in advance. The notification server 60 may be implemented using, for example, APNS or GCM. The notification server 60 may be configured to be able to execute a plurality of types of programs and protocols according to the type of hardware and OS (Operating System) of a user terminal to which the communication system 100 provides a service. The notification server 60 notifies the user terminal corresponding to the second user identification information of the call control information according to the instruction of the management server 50.

  FIG. 5 is a sequence chart showing a specific example of the operation of the communication system 100. In the sequence chart illustrated in FIG. 5, a process executed when the user of the first user terminal 10 starts a group call between the user of the second user terminal 20 and the user of the third user terminal 30 is described. It is shown. First, a user who intends to start an inter-group call (user of the first user terminal 10) inputs a call start instruction by operating the input unit 102 of the first user terminal 10. When the user inputs the call start instruction, the user designates the user (the user of the second user terminal 20 and the user of the third user terminal 30) to be the call destination. The user may specify the user to be the destination by inputting the first user identification information or select the first user identification information stored in the first user terminal 10. May be specified. The selection of the first user identification information may be performed by, for example, selecting the first user identification information displayed on the display unit 103. The selection of the first user identification information may be performed, for example, by selecting a user name (real name, user ID, nickname, or the like) or an image displayed on the display unit 103 in association with the first user identification information. .

  The control unit 106 receives a call start instruction input by a user and an instruction of a user as a call destination (step S101). The control unit 106 generates a call ID according to the call start instruction (step S102). The call ID is identification information that uniquely indicates the call that is about to start. The call ID may be configured to uniquely indicate the call only during a predetermined period (for example, until the call ends). The call ID may be implemented as, for example, a room-id or a peer-id. The call ID is one of specific examples of the call control information.

  The control unit 106 transmits a call start request including the first user identification information of the user to be called and the call ID to the call server 40 (step S103). The call start request is data indicating a request to start a call with a user of another user terminal that has transmitted the call start request including the same call ID. Upon receiving the call start request, the call server 40 executes pre-processing for starting a call, and waits until a call start request including the same call ID is received from another user terminal. The control unit 106 transmits a call ID notification request including the first user identification information of the user as the call destination and the call ID to the management server 50 (Step S104). The call ID notification request is data indicating a request for notifying the call ID to another user terminal that is a call destination.

  Upon receiving the call ID notification request, the notification control unit 504 of the management server 50 executes an ID conversion process (Step S105). In the processing illustrated in FIG. 5, the notification control unit 504 acquires the second user identification information regarding the second user terminal 20 and the third user terminal 30 by performing the ID conversion processing. The notification control unit 504 generates a notification request including the second user identification information obtained by performing the ID conversion process and the call ID included in the call ID notification request. The notification request is data indicating a request to notify each user terminal used by the user indicated by the second user identification information of the call ID. The notification control unit 504 transmits the generated notification request to the notification server 60 (Step S106).

  Upon receiving the notification request, the notification server 60 notifies the user terminal of each user indicated by the second user identification information included in the notification request of the call ID included in the notification request (Steps S107 and S108). In the present embodiment, the call ID is notified by transmitting a call request notification to each user terminal. The call request notification is a notification indicating that the user who is the transmission source of the call start request (the user of the first user terminal 10) is requested to start a call.

  Upon receiving the call request notification, the user terminal transmits a call start request including the call ID included in the received call request notification to the call server 40 (Steps S109 and S110). The transmission of the call start request may be transmitted at any timing. For example, a call start request may be transmitted at the following timing.

  The control unit 106 of the user terminal that has received the call request notification displays on the display unit 103 that the call start request has been received. This display may be performed, for example, according to the processing of the OS of the first user terminal 10. In this display, identification information indicating the requesting user (user of the first user terminal 10) is displayed. In conjunction with this display, an image for instructing to start a call is displayed. Then, at the timing when the operation on the image is performed, the control unit 106 transmits a call start request.

  Upon receiving the call start request from the second user terminal 20 or the third user terminal 30, the call server 40 transmits another call start request including the same call ID as the call ID included in the call start request (the first user). A notification (call start notification) indicating that the call has been started is transmitted to the terminal 10) (step S111). The call server 40 starts a call between the user terminals that have transmitted the call start request (step S112). In the example shown in FIG. 5, an inter-group call is started between each user of the first user terminal 10, the second user terminal 20, and the third user terminal 30.

  In the communication system 100 configured as described above, information (call ID) necessary for starting a call with another user by a call service provided by the call server 40 is transmitted to a call destination of the user in response to a call start instruction from the user. The user terminal is notified. Therefore, the user who wants to start the call does not need to voluntarily use any means to notify the other user as the call destination of the call ID in advance. Therefore, it is possible to start a call more easily.

(Modification)
The control unit 502 of the management server 50 may be configured to further include functions other than the notification control unit 504. For example, the control unit 502 of the management server 50 may further include a function of a group control unit. The group control unit provides a communication service to members belonging to the same group. For example, the group control unit includes a function for realizing a text-based conversation between members in the group (chat function, messenger function), a function for sharing images posted by members in the group with other members in the group, A function may be provided for sending and receiving e-mail between members. In this case, the notification control unit 504 may be configured to provide the service of the P2P call and the inter-group call only to members belonging to the same group. The notification control unit 504 may use the identification information of each user used by the group control unit as the first user identification information.

  The identification information table shown in FIG. 4 may have a value of another identification information (for example, third user identification information) instead of the first user identification information. The third user identification information is identification information indicating a user of the user terminal, and is information managed by one of the information processing apparatuses in association with the first user identification information. For example, when the first user identification information is input to the user terminal as the information of the call destination, the first user identification information becomes the third identification information by the user terminal, the call server 40, the management server 50, or another device (not shown). It may be converted. Then, in the management server 50, the second user identification information associated with the third identification information may be acquired. In the present embodiment, the third identification information obtained indirectly as described above is also described as a type of identification information (first user identification information) that can be obtained by a user who wants to make a call.

[Second embodiment]
FIG. 6 is a system configuration diagram illustrating a system configuration of the communication system 100a according to the second embodiment. The communication system 100a differs from the communication system 100 in the first embodiment in that the communication system 100a does not include the call server 40 and the notification server 60, and includes a management server 50a instead of the management server 50. Except for these points, the communication system 100 and the communication system 100a may have the same configuration. Hereinafter, the differences of the communication system 100a in the second embodiment from the communication system 100 in the first embodiment will be described.

  FIG. 7 is a schematic block diagram illustrating an example of a functional configuration of the management server 50a according to the second embodiment. The management server 50a includes a communication unit 501, a control unit 502a, and a table storage unit 503. The management server 50a differs from the management server 50 of the first embodiment in that the management server 50a includes a control unit 502a instead of the control unit 502.

  The control unit 502a is configured using a CPU and a memory connected via a bus. The control unit 502a executes an application program installed in the management server 50a in advance. The control unit 502a operates based on data received by the communication unit 501 and installed application programs. The control unit 502a implements the functions of the notification control unit 504a, the call control unit 505, and the notification unit 506.

  The notification control unit 504a performs substantially the same processing as the notification control unit 504 in the first embodiment. The notification control unit 504a outputs data to the call control unit 505 instead of transmitting data to the call server 40. The notification control unit 504a outputs data to the notification unit 506 instead of transmitting data to the notification server 60. The other operations of the notification control unit 504a are the same as those of the notification control unit 504 in the first embodiment.

  The call control unit 505 performs the same processing as the call server 40 in the first embodiment. The notification unit 506 performs the same processing as the notification server 60 in the first embodiment. That is, the management server 50a according to the second embodiment is a device in which the functions of the call server 40 and the notification server 60 according to the first embodiment are further mounted.

  FIG. 8 is a sequence chart showing a specific example of the operation of the communication system 100a. The processing in step S201 and step S202 is the same as the processing in step S101 and S102 in the first embodiment, and a description thereof will be omitted.

  The control unit 106 of the first user terminal 10 transmits a call start request including the first user identification information and the call ID of the user to be called to the management server 50a (Step S203). The call start request is data indicating a request to start a call with a user of another user terminal that has transmitted the call start request including the same call ID.

  Upon receiving the call start request, the call control unit 505 of the management server 50a executes preprocessing for starting a call, and waits until a call start request including the same call ID is received from another user terminal. Upon receiving the call start request, the notification control unit 504a of the management server 50a executes an ID conversion process (Step S204). The notification control unit 504a in the second embodiment executes an ID conversion process based on the first user identification information included in the call start request. In the processing illustrated in FIG. 8, the notification control unit 504a acquires the second user identification information regarding the second user terminal 20 and the third user terminal 30 by performing the ID conversion processing. The notification control unit 504a outputs the second user identification information obtained by executing the ID conversion process and the call ID included in the call start request to the notification unit 506. The notification unit 506 notifies the user terminal of each user indicated by the second user identification information output from the notification control unit 504a of the call ID output from the notification control unit 504a (Steps S205 and S206). In the present embodiment, the call ID is notified by transmitting a call request notification to each user terminal.

  Upon receiving the call request notification, the user terminal transmits a call start request including the call ID included in the received call request notification to the management server 50a (Steps S207 and S208). The timing at which the call start request is transmitted is the same as in the first embodiment.

  Upon receiving the call start request from the second user terminal 20 or the third user terminal 30, the call control unit 505 of the management server 50a transmits another call start request including the same call ID as the call ID included in the call start request. A notification (call start notification) indicating that the call has been started is transmitted to the original (first user terminal 10) (step S209). The call control unit 505 starts a call between the user terminals that have transmitted the call start request (step S210). In the example illustrated in FIG. 8, an inter-group call is started between each user of the first user terminal 10, the second user terminal 20, and the third user terminal 30.

  With the communication system 100a configured as described above, effects similar to those of the communication system 100 according to the first embodiment can be obtained.

(Modification)
The communication system 100a in the second embodiment may be modified similarly to the communication system 100 in the first embodiment.
The control unit 502a of the management server 50a of the communication system 100a according to the second embodiment may be configured not to include the call control unit 505. In this case, the communication system 100a is configured to include the call server 40.

  The control unit 502a of the management server 50a of the communication system 100a according to the second embodiment may be configured not to include the notification unit 506. In this case, the communication system 100a is configured to include the notification server 60.

  As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to the embodiments and includes a design and the like within a range not departing from the gist of the present invention.

100 communication system, 10 first user terminal, 20 second user terminal, 30 third user terminal, 40 communication server, 50 management server, 60 notification server, 70 network, 101 communication unit, 102 input unit, 103 display unit, 104 audio input unit, 105 audio output unit, 106 control unit, 501 communication unit, 502 control unit, 503 table storage unit, 504 notification control unit, 505 … Call control unit, 506… Notification unit

Claims (7)

A table storage unit for storing, for each user, first identification information indicating the user and identification information indicating the user, the second identification information being different from the first identification information, in which the first identification information is associated with the second identification information When,
Receiving, from a user terminal of a user who intends to start a call with another user, first identification information indicating a plurality of the other users, and call control information necessary for starting the call, acquires the second identification information stored in association with each of said first identification information in the table, to the notification server for notifying the user terminal indicated by the second identification information, the obtained plurality of the A notification control unit that instructs the user terminal of the other user indicated by the second identification information to notify the call control information,
Equipped with a,
The call control information is a call server that provides a call service that allows multiple users to participate in the user of the user terminal and the plurality of other users. Identification information,
The notification control unit, when notifying the call control information, so that a request to start a call is transmitted from the user terminal of the other user to the call server according to the operation of the other user. A management server that notifies the notification server of the call control information . The notification control unit, when notifying the call control information, an image for instructing to start a call on the user terminal of the other user is displayed, and at the timing when an operation on the image is performed, 2. The management server according to claim 1 , wherein the control server notifies the notification server of the call control information so that a request for starting the call is transmitted to a call server from a user terminal of the another user . 3. A table storage unit for storing, for each user, first identification information indicating the user and identification information indicating the user, the second identification information being different from the first identification information, in which the first identification information is associated with the second identification information When,
Receiving, from a user terminal of a user who intends to start a call with another user, first identification information indicating a plurality of the other users, and call control information necessary for starting the call, A notification control unit that acquires the second identification information stored in the table in association with each of the first identification information,
Based on the plurality of the second identification information acquired by the notification control unit, the user terminal of the plurality of other users the second identification information indicates, a notification unit that notifies the call control information,
With
The call control information is a call server that provides a call service that allows multiple users to participate in the user of the user terminal and the plurality of other users. Identification information,
The notifying unit, when notifying the call control information, notifies a request to start a call in response to an operation of the other user so that the user terminal of the other user is transmitted to the call server. to, communication system. For each user, a step of referring to an identification information table in which first identification information indicating the user and second identification information that is identification information indicating the user and is different from the first identification information are associated with each other;
From a user terminal of a user who is about to start a call with another user, receiving first identification information indicating a plurality of the other users, and call control information required to start the call,
Acquiring the second identification information stored in the identification information table in association with each of the first identification information,
Notifying the notification server that notifies the user terminal indicated by the second identification information, notifying the call control information to the user terminals of the other users indicated by the obtained plurality of second identification information. A notification control step for instructing;
Has,
The call control information is a call server that provides a call service that allows multiple users to participate in the user of the user terminal and the plurality of other users. Identification information,
In the notification control step, when notifying the call control information, a request to start a call is transmitted from the user terminal of the other user to the call server in response to an operation of the other user. And transmitting the call control information to the notification server . For each user, a step of referring to an identification information table in which first identification information indicating the user and second identification information that is identification information indicating the user and is different from the first identification information are associated with each other;
From a user terminal of a user who is about to start a call with another user, receiving first identification information indicating a plurality of the other users, and call control information required to start the call,
Acquiring the second identification information stored in the identification information table in association with each of the first identification information,
A plurality of said acquired on the basis of the second identification information, the user terminal of the plurality of other users the second identification information indicates a notification step of notifying the call control information,
Has,
The call control information is a call server that provides a call service that allows multiple users to participate in the user of the user terminal and the plurality of other users. Identification information,
In the notifying step, when notifying the call control information, a notification that a call start request is transmitted from the user terminal of the other user to the call server in response to an operation of the other user To provide call control information.   A computer program for causing a computer to function as the management server according to claim 1.   A computer program for causing a computer to function as the communication system according to claim 3.

Images