JP2010263418A - Communication control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication control device that allows a user to easily change the communication state of a plurality of communication terminals. <P>SOLUTION: The communication control device 500 includes a communication-group information storage means 501, a communication-state detecting means 502, and a communication control means 503. The communication-group information storage means 501 stores communication-group information including a plurality of terminal identifiers for identifying a communication terminal. The communication-state detecting means 502 detects a change in communication state of the communication terminal. When the change in communication state of the communication terminal is detected by the communication-state detecting means 502, the communication control means 503 controls the communication state of the communication terminal identified by another terminal identifier included in communication-group information including the terminal identifier for identifying the communication terminal. When the communication state of one communication terminal is changed, another communication terminal can be controlled along with the one communication terminal. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a communication control apparatus that controls a communication state of a communication terminal.

  A communication control system that realizes real-time call communication between a plurality of terminal users is known. This type of communication control system includes a plurality of communication terminals connected to each other via a communication network. Each communication terminal executes a program (call application) such as instant message software or software phone, for example.

  Further, the communication control system includes a communication control device such as a SIP server. The communication control device controls a communication session between communication terminals using a communication control protocol such as SIP (Session Initial Protocol), and performs call control such as call start, call hold, and call end.

  The communication control device manages each communication terminal by using a terminal identifier that can uniquely identify a terminal such as SIP-URI (Uniform Resource Identifier). In addition, when executing a call, the communication control device generates a call session ID that uniquely identifies a communication session of a call medium such as voice between terminals during the call, and uses the communication session ID as a key to communicate the communication session. Manage state.

  In this communication control system, when a multi-party call is performed using call media such as voice and video, a media data communication device called a conference bridge, a conference trunk, or MCU (Multi point Control Unit) is used as an intermediary. In this case, the communication control system connects each of the plurality of line ports provided in the media data communication apparatus to each communication terminal.

  In addition, in the communication control system as described above, not only voice and video, but also text chat for talking with other callers using text (character strings), and further, one communication terminal during a call is included. There is a type that can use a call medium such as data sharing in which a data file can be transmitted to another party and the data file can be used as shared data.

  Data sharing is, for example, a virtual whiteboard set on a calling application, and is set on a whiteboard that allows terminal users who make a call to perform input operations and drawing operations on shared data. For example, a document image that is shared data is displayed and executed on the background.

  In such call media such as text chat and data sharing, it is important to keep the arrival order of event data received by each terminal and stored internally in all terminals. For this reason, the communication control system provides a media data communication device called a server to connect the server and each communication terminal. Then, the communication control system aggregates and receives the events transmitted from each terminal to the server, serializes them, and distributes them to each terminal.

  Further, when a call is made using these media data communication devices in the communication control system, the communication control device connects the media data communication device and the communication terminal using a communication control protocol such as SIP. Further, the communication control device manages each communication session between the media data communication device and each communication terminal as one call session.

  The media data communication device may be able to handle communication of all call media collectively by one device. However, when a communication control system is applied to a large company or a communication provider, a large number of call sessions may be executed simultaneously, and it is necessary to ensure processing performance capable of executing the communication processing. Therefore, it is desirable that the media data communication device is configured as an independent device for some or all call media.

  As described above, when the communication control system includes a plurality of media data communication devices, the communication control device manages each media data communication device with a different terminal identifier such as SIP-URI. Therefore, when a call is performed using a plurality of call media such as voice, video, text chat, and data sharing at the same time, the communication control device individually establishes a communication session between the communication terminal and each media data communication device. Generate. And a communication control apparatus manages the communication state of each communication session by assigning each different call session ID.

  An example of a technique for realizing such a communication control system is described in Patent Document 1. Patent Document 1 describes a telephone conference system including a content node that holds content such as images and videos to be shared during a call. This telephone conference system is configured to access a content node by exchanging messages including address information for allowing terminals in a call to access the content node.

  Another example of the technique is described in Patent Document 2. In Patent Document 2, upon receiving a request from one communication terminal of a conference participant, distribution control of shared data such as page images, video, and audio to another communication terminal of a conference participant and remote electronic presentation are performed. A multimedia document conference participation system that performs execution control is described. Furthermore, this multimedia document conference participation system controls the voice bridge for executing the audio conference as necessary, and registers information on the call media used in the conference with the conference participants on the server side. It includes a meeting server that makes available a call execution technique for calling a conference participant's communication terminal.

  By the way, there are cases where it is desired to make a multimedia call by simultaneously using a plurality of call media such as voice, video, text chat, and data sharing. In this case, it is preferable to use a combination of a plurality of communication terminals with different call media that can be processed, such as a fixed telephone that can process only voice and a PC that can process video, text chat, and data sharing. it is conceivable that.

  An example of a technique for realizing such a communication control system is described in Patent Document 3. Patent Literature 3 describes a communication system that manages media processing capability information of each terminal for terminals that can be used for each user. This communication system starts a call by selecting one or more appropriate terminals capable of processing the call media requested to be used in the call request by referring to the media processing capability information when a call request is made. .

JP 2008-48383 A Japanese National Patent Publication No. 11-506595 Japanese Patent Laid-Open No. 9-62597

  By the way, in the technologies described in Patent Document 1 to Patent Document 3, when one user performs multimedia communication using a plurality of communication terminals simultaneously, it responds to a change in the communication state of one communication terminal. Thus, the communication status of other communication terminals could not be controlled in conjunction with each other. Therefore, the user has to input an instruction for changing the communication state to each of the plurality of communication terminals. That is, there is a problem that the user's trouble when changing the communication state of the communication terminal is complicated.

  For this reason, an object of the present invention is to provide a communication control apparatus capable of solving the above-mentioned problem that “the user's trouble when changing the communication state of the communication terminal is complicated”. .

In order to achieve such an object, a communication control apparatus according to one aspect of the present invention is provided.
Communication group information storage means for storing communication group information including a plurality of terminal identifiers for identifying communication terminals;
Communication state detecting means for detecting a change in the communication state of the communication terminal;
Communication control for controlling a communication state of a communication terminal identified by another terminal identifier included in communication group information including a terminal identifier for identifying the communication terminal when a change in the communication state of the communication terminal is detected Means,
Is provided.

In addition, a communication control method according to another aspect of the present invention includes:
A communication state detection step of detecting a change in the communication state of the communication terminal;
Of the communication group information stored in the storage device that stores communication group information including a plurality of terminal identifiers for identifying the communication terminal, the communication terminal in which a change in the communication state is detected in the communication state detection step A communication control step of controlling the communication state of the communication terminal identified by the other terminal identifier included in the communication group information including the terminal identifier for identifying
including.

Moreover, the program which is the other form of this invention is:
In the communication control device,
Communication state detecting means for detecting a change in the communication state of the communication terminal;
Of communication group information stored in a storage device that stores communication group information including a plurality of terminal identifiers for identifying the communication terminal, a communication terminal in which a change in communication state is detected by the communication state detection means Communication control means for controlling the communication state of a communication terminal identified by another terminal identifier included in communication group information including a terminal identifier for identification;
It is a program for realizing.

Moreover, the communication control system which is the other form of this invention,
A system includes a plurality of communication terminals, a media data communication apparatus capable of communicating media data, and a communication control apparatus that controls communication between the communication terminal and the media data communication apparatus.

Furthermore, the communication control device
Communication group information storage means for storing communication group information including a plurality of terminal identifiers for identifying the communication terminals;
Communication state detecting means for detecting a change in the communication state of the communication terminal;
Communication control for controlling a communication state of a communication terminal identified by another terminal identifier included in communication group information including a terminal identifier for identifying the communication terminal when a change in the communication state of the communication terminal is detected Means,
Is provided.

  By configuring the present invention as described above, the user can easily change the communication state of a plurality of communication terminals.

It is a block diagram showing the structure of the communication control system which concerns on 1st Embodiment of this invention. It is the sequence diagram which showed the operation | movement in the case of starting multimedia communication of the communication control system which concerns on 1st Embodiment of this invention. It is the sequence diagram which showed the operation | movement in the case of starting multimedia communication of the communication control system which concerns on 1st Embodiment of this invention. It is the sequence diagram which showed the operation | movement in the case of starting multimedia communication of the communication control system which concerns on 1st Embodiment of this invention. It is the sequence diagram which showed the operation | movement when one of the users of the communication terminal which is performing the multimedia communication of the communication control system which concerns on 1st Embodiment of this invention withholds communication. It is the sequence diagram which showed the operation | movement when one of the users of the communication terminal which is performing the multimedia communication of the communication control system which concerns on 1st Embodiment of this invention withholds communication. It is the sequence diagram which showed the operation | movement in case one of the users of the communication terminal which is performing the multimedia communication of the communication control system which concerns on 1st Embodiment of this invention transfers communication. It is the sequence diagram which showed the operation | movement in case one of the users of the communication terminal which is performing the multimedia communication of the communication control system which concerns on 1st Embodiment of this invention transfers communication. It is the sequence diagram which showed the operation | movement in case one of the users of the communication terminal which is performing the multimedia communication of the communication control system which concerns on 1st Embodiment of this invention transfers communication. It is the sequence diagram which showed the operation | movement in case one of the users of the communication terminal which is performing the multimedia communication of the communication control system which concerns on 1st Embodiment of this invention transfers communication. It is a block diagram showing the structure of the communication control system which concerns on 2nd Embodiment of this invention. It is the sequence diagram which showed the action | operation in the case of starting multimedia communication of the communication control system which concerns on 2nd Embodiment of this invention. It is the sequence diagram which showed the action | operation in the case of starting multimedia communication of the communication control system which concerns on 2nd Embodiment of this invention. It is the sequence diagram which showed the action | operation in the case of starting multimedia communication of the communication control system which concerns on 2nd Embodiment of this invention. It is a block diagram showing the structure of the communication control apparatus which concerns on the modification of each embodiment of this invention.

A communication control apparatus according to one aspect of the present invention
Communication group information storage means for storing communication group information including a plurality of terminal identifiers for identifying communication terminals;
Communication state detecting means for detecting a change in the communication state of the communication terminal;
Communication control for controlling a communication state of a communication terminal identified by another terminal identifier included in communication group information including a terminal identifier for identifying the communication terminal when a change in the communication state of the communication terminal is detected Means,
Is provided.

  According to this, when the communication state of one communication terminal among a plurality of communication terminals changes, the communication state of another communication terminal associated with the communication terminal is changed to the communication terminal whose communication state has changed. It is possible to control (change) in conjunction with each other (for example, start communication, end communication, hold communication, or transfer communication). As a result, for example, when one user performs multimedia communication using a plurality of communication terminals simultaneously, the user only inputs an instruction for changing the communication state to one communication terminal. Thus, the communication state of other communication terminals can be changed. That is, the user can easily change the communication state of a plurality of communication terminals.

  In this case, the communication group information storage means is preferably configured to store information associating a user identifier for identifying a user with the plurality of terminal identifiers as the communication group information. is there.

  In this case, the communication group information storage means identifies the multimedia communication when a communication session is established for each of the plurality of communication terminals in order to perform multimedia communication for communicating a plurality of media data. It is preferable that information that associates the multimedia communication identifier for the communication with the plurality of terminal identifiers for identifying each of the plurality of communication terminals is stored as the communication group information.

  In this case, it is preferable that the communication state detection unit is configured to detect a change in the communication state of the communication terminal by receiving a change instruction for changing the communication state from the communication terminal. .

  In this case, the communication control means, when the communication state detection means receives a communication start instruction instructing to start communication from the communication terminal as the change instruction, a terminal identifier for identifying the communication terminal It is preferable to control the communication state of the communication terminal so as to newly establish a communication session for the communication terminal identified by the other terminal identifier included in the communication group information including.

In another aspect of the communication control device,
The communication control means includes a communication including a terminal identifier for identifying the communication terminal when the communication state detection means receives a communication end instruction as an instruction to end communication from the communication terminal as the change instruction. It is preferable to control the communication state of the communication terminal so as to disconnect the communication session established with respect to the communication terminal identified by the other terminal identifier included in the group information.

In another aspect of the communication control device,
The communication control means includes a communication group including a terminal identifier for identifying the communication terminal when the communication state detection means receives a hold instruction as an instruction to hold communication from the communication terminal as the change instruction. It is preferable to control the communication state of the communication terminal so as to temporarily disconnect the communication session established with respect to the communication terminal identified by the other terminal identifier included in the information.

In another aspect of the communication control device,
The communication control unit includes a communication group including a terminal identifier for identifying the communication terminal when the communication state detection unit receives a transfer instruction instructing to transfer communication from the communication terminal as the change instruction. Controls the communication state of the communication terminal so as to disconnect the communication session established for the communication terminal identified by the other terminal identifier included in the information, and the transfer destination terminal identifier included in the transfer instruction. The communication state of the communication terminal is controlled so that a communication session is established for each of the communication terminal identified by the communication terminal and the communication terminal identified by the other terminal identifier included in the communication group information including the terminal identifier. It is preferable to do.

  In this case, it is preferable that the communication control unit is configured to control communication between the communication terminal and a media data communication apparatus capable of communicating the media data.

In addition, a communication control method according to another aspect of the present invention includes:
A communication state detection step of detecting a change in the communication state of the communication terminal;
Of the communication group information stored in the storage device that stores communication group information including a plurality of terminal identifiers for identifying the communication terminal, the communication terminal in which a change in the communication state is detected in the communication state detection step A communication control step of controlling the communication state of the communication terminal identified by the other terminal identifier included in the communication group information including the terminal identifier for identifying
including.

  In this case, the communication group information is preferably information in which a user identifier for identifying a user is associated with the plurality of terminal identifiers.

In this case, the communication control method is
When a communication session is established for each of the plurality of communication terminals to perform multimedia communication for communicating a plurality of media data, a multimedia communication identifier for identifying the multimedia communication, It is preferable to include a communication group information storage processing step of storing information associating a plurality of terminal identifiers for identifying each of the communication terminals in the storage device as the communication group information.

Moreover, the program which is the other form of this invention is:
In the communication control device,
Communication state detecting means for detecting a change in the communication state of the communication terminal;
Of communication group information stored in a storage device that stores communication group information including a plurality of terminal identifiers for identifying the communication terminal, a communication terminal in which a change in communication state is detected by the communication state detection means Communication control means for controlling the communication state of a communication terminal identified by another terminal identifier included in communication group information including a terminal identifier for identification;
It is a program for realizing.

  In this case, the communication group information is preferably information in which a user identifier for identifying a user is associated with the plurality of terminal identifiers.

In this case, the program is
In addition to the communication control device,
When a communication session is established for each of the plurality of communication terminals to perform multimedia communication for communicating a plurality of media data, a multimedia communication identifier for identifying the multimedia communication, Preferably, the program is a program for realizing a communication group information storage processing unit that stores information associating a plurality of terminal identifiers for identifying each of the communication terminals in the storage device as the communication group information. is there.

Moreover, the communication control system which is the other form of this invention,
A system includes a plurality of communication terminals, a media data communication apparatus capable of communicating media data, and a communication control apparatus that controls communication between the communication terminal and the media data communication apparatus.

Furthermore, the communication control device
Communication group information storage means for storing communication group information including a plurality of terminal identifiers for identifying the communication terminals;
Communication state detecting means for detecting a change in the communication state of the communication terminal;
Communication control for controlling a communication state of a communication terminal identified by another terminal identifier included in communication group information including a terminal identifier for identifying the communication terminal when a change in the communication state of the communication terminal is detected Means,
Is provided.

  In this case, the communication group information storage means is preferably configured to store information associating a user identifier for identifying a user with the plurality of terminal identifiers as the communication group information. is there.

  In this case, the communication group information storage means identifies the multimedia communication when a communication session is established for each of the plurality of communication terminals in order to perform multimedia communication for communicating a plurality of media data. It is preferable that information that associates the multimedia communication identifier for the communication with the plurality of terminal identifiers for identifying each of the plurality of communication terminals is stored as the communication group information.

In this case, the communication terminal is configured to transmit a change instruction for changing the communication state of the communication terminal to the communication control device according to information input by the user.
It is preferable that the communication state detection unit is configured to detect a change in the communication state of the communication terminal when the communication control device receives the change instruction from the communication terminal.

In this case, when establishing a communication session between the communication terminal and the media data communication apparatus, the communication control apparatus transmits predetermined authentication information to each of the communication terminal and the media data communication apparatus. Composed of
The communication terminal is configured to receive the authentication information, and transmit a message including the received authentication information to establish a communication session to the media data communication device.
The media data communication device is configured to permit communication with the communication terminal when the authentication information received from the communication control device and the authentication information received from the communication terminal correspond to each other. Is preferable.

  According to this, only the communication terminal that has received the authentication information from the communication control apparatus can communicate with the media data communication apparatus. That is, it is possible to prevent the communication terminal from communicating by unauthorized access to the media data communication apparatus.

  Even the invention of the communication control method, program, or communication control system having the above-described configuration can achieve the above-described object of the present invention because it has the same operation as the communication control device. .

  Hereinafter, embodiments of a communication control device, a communication control method, a program, and a communication control system according to the present invention will be described with reference to FIGS.

<First Embodiment>
(Constitution)
Next, embodiments of the present invention will be described in detail with reference to the drawings.
Referring to FIG. 1, a communication control system 100 according to the first embodiment of the present invention communicates with a communication control device 2, media data communication devices 3a and 3b, which are communicably connected to each other via a network 1. Terminals 4a, 4b, 5a, 5b, 6a, 6b.

  The communication control apparatus 2 manages the terminal information of each communication terminal 4a, 4b, 5a, 5b, 6a, 6b. Further, the communication control device 2 manages the resource information of the media data communication devices 3a and 3b. The terminal information and resource information will be described later.

  Further, the communication control device 2 mediates exchange of call control messages including connection parameters between the communication terminals 4a, 4b, 5a, 5b, 6a, 6b and the media data communication devices 3a, 3b. The communication control device 2 manages a communication session established between the communication terminals 4a, 4b, 5a, 5b, 6a, 6b and the media data communication devices 3a, 3b. Note that the communication control device 2 may be configured by a plurality of devices.

  The media data communication devices 3a and 3b collect and receive media data transmitted from the communication terminals 4a, 4b, 5a, 5b, 6a, and 6b. Then, the media data communication devices 3a and 3b serialize the received media data (rearrange the media data in the order in which the media data was transmitted), and send the media data to the communication terminals 4a, 4b, 5a, 5b, 6a, and 6b. Distribute (send). Here, the media data is data representing media such as voice, video, text chat, and data sharing. The media data includes operation event information input by the user.

  Each media data communication device 3a, 3b is a device capable of communicating only one media data. For example, the media data communication device 3a is configured to be able to communicate only media data representing audio, and the media data communication device 3b is configured to be able to communicate only media data representing video. Each media data communication device 3a, 3b may be configured to be able to communicate a plurality of media data.

  Further, the communication control system 100 may include a plurality of media data communication devices that can communicate the same media data.

  Each communication terminal 4a, 4b, 5a, 5b, 6a, 6b is a device capable of communicating only one piece of media data. For example, each communication terminal 4a, 5a, 6a is configured to be able to communicate only media data representing audio, and each communication terminal 4b, 5b, 6b is configured to be able to communicate only media data representing video. . Each communication terminal 4a, 4b, 5a, 5b, 6a, 6b may be configured to be able to communicate a plurality of media data. The user can use one or a plurality of communication terminals 4a, 4b, 5a, 5b, 6a, 6b.

  In the present embodiment, the media data communication device 3a is configured to be able to communicate first media data, and the media data communication device 3b is configured to be able to communicate second media data. User A uses communication terminal 4a and communication terminal 4b, user B uses communication terminal 5a and communication terminal 5b, and user C uses communication terminal 6a and communication terminal 6b.

  The communication control device 2 includes a call control message relay means 21, a user terminal information management means (a part of the communication group information storage means) 22, a media data communication device information management means 23, and a user communication session information management means (communication). A part of group information storage means) 24, and user communication session control means (communication state detection means, communication control means) 25. These means are implement | achieved when the central processing unit (CPU; Central Processing Unit) with which the communication control apparatus 2 is provided runs the program memorize | stored in the memory | storage device with which the communication control apparatus 2 is provided.

  When the call control message relay means 21 starts communication (for example, communication by voice, that is, telephone call) according to the communication control protocol (SIP in this example), the communication terminals 4a, 4b, 5a, 5b, 6a, 6b Call control messages exchanged between them, or call control messages exchanged between the communication terminals 4a, 4b, 5a, 5b, 6a, 6b and the media data communication devices 3a, 3b are relayed.

  The call control message relay unit 21 performs signaling for adjusting a parameter indicating a network connection or a medium to be used. The call control message relay means 21 delivers the message received from the communication terminals 4a, 4b, 5a, 5b, 6a, 6b to the user communication session control means 25 when relaying the call control message.

  The user terminal information management means 22 manages the terminal information of each communication terminal 4a, 4b, 5a, 5b, 6a, 6b by storing it in a storage device.

  Here, the terminal information includes a user identifier for identifying the user, a terminal identifier for identifying the communication terminal (for example, SIP-URI assigned to the communication terminal), and an IP assigned to the communication terminal. (Internet Protocol) address, information indicating the type and communication protocol of media data that can be processed by the communication terminal, information indicating the format of the media data, and information indicating the communication port.

  The terminal information may include information indicating whether or not the communication terminal can communicate and / or information indicating whether or not the communication terminal can be used. The terminal information may be fixedly registered using a setting file, a setting tool, or the like, or may be dynamically registered by a terminal registration process in a communication control protocol such as SIP. The terminal information is information also called communication group information.

  The media data communication device information management means 23 manages resource information of the media data communication devices 3 a and 3 b connected to the network 1. Here, the resource information includes a device identifier for identifying the media data communication device (for example, SIP-URI assigned to the media data communication device), an IP address assigned to the media data communication device, and a medium. It includes information indicating the type and communication protocol of media data that can be processed by the data communication device, information indicating the format of the media data, and information indicating the communication port.

  The resource information may include information indicating whether or not the media data communication apparatus can communicate and / or information indicating whether or not the media data communication apparatus can be used. The resource information may include information indicating the number of communication sessions currently being processed (established) and / or the upper limit number of communication sessions that can be accepted (established).

  The resource information may be fixedly registered using a setting file, a setting tool, or the like, or may be dynamically registered by a device registration process or the like in a communication control protocol such as SIP.

  The user communication session information management means 24 manages user communication session information by storing user communication session information in a storage device for each multimedia communication that communicates a plurality of media data.

  The user communication session information includes information indicating the terminal identifiers and IP addresses of a plurality of communication terminals 4a, 4b, 5a, 5b, 6a, and 6b that have established communication sessions for performing multimedia communication, and performs multimedia communication. Information indicating the device identifiers and IP addresses of the media data communication devices 3a and 3b with which the communication session has been established.

  Further, the user communication session information includes a session identifier for identifying a communication session established between the communication terminals 4a, 4b, 5a, 5b, 6a, 6b and the media data communication devices 3a, 3b, and multimedia communication. And a multimedia communication identifier for identifying.

  In addition, the user communication session information includes communication state information. The communication status information includes communication between the communication terminals 4a, 4b, 5a, 5b, 6a, 6b and / or between the communication terminals 4a, 4b, 5a, 5b, 6a, 6b and the media data communication devices 3a, 3b. This is information indicating the communication state (communication state). For example, the communication state information is information representing various call states in a communication control protocol such as SIP, and specifically, information representing “communication” or “pending”. The user communication session information is information also called communication group information.

  The user communication session control unit 25 receives (accepts) a call control message as a change instruction for changing the communication state from the call control message relay unit 21 to detect a change in the communication state of the communication terminal. In this example, the user communication session control means 25 indicates that communication has started (communication start), communication has been suspended (communication suspension), communication has been transferred (communication transfer), as a change in communication state. Alternatively, it is detected that communication has ended (communication end).

  Then, the user communication session control means 25 detects the change in the communication state of the communication terminal, and establishes or disconnects the communication session, the media data communication devices 3a and 3b and the communication terminals 4a, 4b, 5a and 5b. , 6a, 6b are determined. Further, the user communication session control means 25 transmits information instructing to establish or disconnect the communication session to the determined media data communication devices 3a and 3b and the communication terminals 4a, 4b, 5a, 5b, 6a and 6b. .

  More specifically, when a change in the communication state of the communication terminal is detected, the user communication session control means 25 is another terminal identifier included in the communication group information including the terminal identifier for identifying the communication terminal. The communication state of the communication terminal identified by is controlled. Here, the communication group information is terminal information at a time point before communication starts, and is user communication session information at a time point after communication starts.

  In this example, the user communication session control means 25, when receiving a communication start instruction instructing to start communication from a communication terminal as a change instruction, communication group information (including a terminal identifier for identifying the communication terminal) ( That is, the communication terminal identified by the other terminal identifier included in the terminal information) is specified. The user communication session control means 25 controls the communication state of the specified communication terminal so as to newly establish a communication session for the specified communication terminal.

  In addition, when the user communication session control means 25 receives a communication end instruction for instructing to end communication from the communication terminal as a change instruction, the communication group information including a terminal identifier for identifying the communication terminal (that is, A communication terminal identified by another terminal identifier included in (user communication session information) is specified. The user communication session control means 25 controls the communication state of the specified communication terminal so as to disconnect the communication session established for the specified communication terminal.

  Further, the user communication session control means 25, when receiving a hold instruction for instructing to hold communication from the communication terminal as a change instruction, communication group information including a terminal identifier for identifying the communication terminal (ie, user A communication terminal identified by another terminal identifier included in the communication session information) is specified. The user communication session control means 25 controls the communication state of the specified communication terminal so as to temporarily disconnect the communication session established for the specified communication terminal.

  In addition, when the user communication session control means 25 receives a transfer instruction for instructing to transfer communication from the communication terminal as a change instruction, the communication group information (that is, user information) including a terminal identifier for identifying the communication terminal is received. A communication terminal identified by another terminal identifier included in the communication session information) is specified. The user communication session control means 25 controls the communication state of the specified communication terminal so as to disconnect the communication session established for the specified communication terminal.

  Further, the user communication session control means 25 is a communication terminal identified by a transfer destination terminal identifier included in the transfer instruction, and a communication identified by another terminal identifier included in communication group information including the terminal identifier. Identify the terminal. The user communication session control means 25 controls the communication state of the specified communication terminal so as to establish a communication session with the specified communication terminal.

  Each of the media data communication devices 3a and 3b includes a communication unit 31, a call control message processing unit 32, and a media data processing unit 33. These means are realized by the CPU provided in each media data communication device 3a, 3b executing a program stored in the storage device provided in each media data communication device 3a, 3b.

  When the communication means 31 changes in the communication state in multimedia communication such as communication start, communication hold, communication transfer, or communication end (for example, transmission of media data by the media data processing means 33 has started or ended) The call control message is transmitted to and received from the communication control device 2. Furthermore, the communication means 31 transmits / receives media data to / from the communication terminals 4a, 4b, 5a, 5b, 6a, 6b.

  The call control message processing unit 32 receives the call control message received by the communication unit 31 and controls the execution of the media data processing unit 33.

  The media data processing means 33 collects and receives media data transmitted from each communication terminal 4a, 4b, 5a, 5b, 6a, 6b. The media data processing means 33 serializes the received media data (rearranged in the order in which the media data is transmitted), and distributes the media data to each communication terminal 4a, 4b, 5a, 5b, 6a, 6b ( Send.

  Each communication terminal 4a, 4b, 5a, 5b, 6a, 6b includes a communication means 41, a call control message processing means 42, a media data processing means 43, and an input / output means 44. In these means, the CPU provided in each communication terminal 4a, 4b, 5a, 5b, 6a, 6b executes the program stored in the storage device provided in each communication terminal 4a, 4b, 5a, 5b, 6a, 6b. It is realized by doing.

  The communication unit 41 performs communication when a change in communication state in multimedia communication such as communication start, communication hold, communication transfer, or communication end occurs (for example, when a change instruction is received by the input / output unit 44). A call control message is transmitted to and received from the control device 2. Furthermore, the communication means 41 transmits / receives media data to / from the media data communication devices 3a and 3b.

  The call control message processing means 42 receives the call control message received by the communication means 41 and controls the execution of the media data processing means 43. When the change instruction is accepted by the input / output means 44, the call control message processing means 42 transmits a call control message as a change instruction to the communication control device 2 via the communication means 41.

  The media data processing means 43 transmits / receives media data to / from other communication terminals by way of the media data communication devices 3a and 3b. The media data processing unit 43 performs processing for processing media data based on the processing instruction received by the input / output unit 44.

  The input / output means 44 includes an input / output device such as a display, a keyboard, a mouse, and a camera. The input / output unit 44 causes the display to display an image that prompts the user to input a change instruction, a processing instruction, and the like. The input / output unit 44 receives a change instruction and a processing instruction input by the user.

(Operation)
Next, the operation of the communication control system 100 when starting multimedia communication will be described in detail with reference to FIGS.

  First, a user who desires to start multimedia communication (hereinafter referred to as user A) inputs a communication start instruction by operating the input / output means 44 of the communication terminal 4a. Thereby, the call control message processing means 42 of the communication terminal 4a transmits a call control message as a communication start instruction to the communication control device 2 (step S101 in FIG. 2).

  The communication start instruction includes a user identifier of a user who is a communication partner (hereinafter referred to as user B), and type information indicating a type of media data constituting the multimedia communication. In this example, the call control message includes information representing audio and information representing video as type information. The type information may be information representing three or more types.

  Next, the call control message relay means 21 of the communication control device 2 receives the call control message. Then, the user communication session control unit 25 of the communication control device 2 accepts the call control message received by the call control message relay unit 21. Thereby, the user communication session control means 25 detects a change in the communication state of the communication terminal 4a (communication state detection step).

  The user communication session control unit 25 uses the type information included in the received call control message and the resource information managed by the media data communication apparatus information management unit 23 to indicate the type of media data represented by the type information. Is specified (selected). In this example, the user communication session control means 25 specifies the media data communication device 3a and the media data communication device 3b (step S102 in FIG. 2).

  The communication control device 2 is configured to select one media data communication device from the plurality of media data communication devices when there are a plurality of media data communication devices capable of processing certain media data. Is preferred. In addition, when there is no media data communication device capable of processing certain media data, the communication control device 2 is preferably configured to notify the user of the communication terminal to that effect.

  Then, the user communication session control unit 25 includes the type information included in the received call control message and the terminal information including the user identifier of the user A among the terminal information managed by the user terminal information management unit 22. Based on this, a communication terminal capable of processing the media data of the type represented by the type information is specified. In this example, the user communication session control means 25 identifies the communication terminal 4a and the communication terminal 4b (step S103 in FIG. 2, part of the communication control step).

  Note that the communication control device 2 is preferably configured to select one communication terminal from the plurality of communication terminals when there are a plurality of communication terminals capable of processing certain media data. In addition, when there is no communication terminal capable of processing certain media data, the communication control device 2 is preferably configured to notify the user of the communication terminal to that effect. In step S101, the user may explicitly instruct a communication terminal to be used for each media data.

  Next, the user communication session control unit 25 uses the type information included in the received call control message and the user (that is, the user B) as the communication partner of the terminal information managed by the user terminal information management unit 22. ) To identify the communication terminal that can process the media data of the type represented by the type information. In this example, the user communication session control means 25 specifies the communication terminal 5a and the communication terminal 5b (step S104 in FIG. 2).

  Note that the communication control device 2 is preferably configured to select one communication terminal from the plurality of communication terminals when there are a plurality of communication terminals capable of processing certain media data. In addition, when there is no communication terminal capable of processing certain media data, the communication control device 2 is preferably configured to notify the user of the communication terminal to that effect.

  Next, the user communication session control means 25 sends a call control message (requested to start communication) to the communication terminals 5a and 5b used by the user B, selected in step S104, via the call control message relay means 21. (Communication start request) is transmitted (step S105 in FIG. 2).

  Each communication terminal 5a, 5b receives a communication start request. Then, each communication terminal 5a, 5b notifies the user B that the communication start request has been received via the input / output means 44. When the user B inputs a communication start permission instruction via the input / output means 44, the call control message processing means 42 of each of the communication terminals 5a and 5b calls control as a communication start permission response indicating that the start of communication is permitted. A message is transmitted to the communication control apparatus 2 (steps S106a and S106b in FIG. 2).

  As a result, the user communication session control means 25 accepts a call control message as a communication start permission response via the call control message relay means 21. Then, the user communication session control unit 25 transmits a call control message as a communication session establishment request including the resource information of the media data communication device 3a to the communication terminal 4a via the call control message relay unit 21.

  Further, the user communication session control unit 25 transmits a call control message as a communication session establishment request including the resource information of the media data communication device 3b to the communication terminal 4b via the call control message relay unit 21 (FIG. 2). Step S107, part of the communication control step).

  Each communication terminal 4a, 4b receives a call control message as a communication session establishment request. Then, the communication terminal 4a exchanges a call control message for establishing a communication session with the media data communication device 3a via the communication control device 2 (step S108a in FIG. 3). Similarly, the communication terminal 4b exchanges a call control message for establishing a communication session with the media data communication device 3b via the communication control device 2 (step S108b in FIG. 3).

  Thereby, a communication session is established between the communication terminal 4a and the media data communication device 3a. Further, a communication session is established between the communication terminal 4b and the media data communication device 3b. Thereafter, each of the communication terminals 4a and 4b transmits a call control message to the communication control device 2 as a communication session establishment completion notification indicating that the establishment of the communication session has been completed (steps S109a and S109b in FIG. 3).

  When exchanging a call control message for establishing a communication session, the communication control device 2 generates a unique session identifier (for identifying the communication session) for each communication session.

  Further, in parallel with step S107, the user communication session control means 25 sends a call control message as a communication session establishment request including the resource information of the media data communication device 3a via the call control message relay means 21 to the communication terminal. Send to 5a. In addition, the user communication session control means 25 transmits a call control message as a communication session establishment request including the resource information of the media data communication device 3b to the communication terminal 5b via the call control message relay means 21 (FIG. 3 step S110).

  Each communication terminal 5a, 5b receives a call control message as a communication session establishment request. Then, the communication terminal 5a exchanges a call control message for establishing a communication session with the media data communication device 3a via the communication control device 2 (step S111a in FIG. 3). Similarly, the communication terminal 5b exchanges a call control message for establishing a communication session with the media data communication device 3b via the communication control device 2 (step S111b in FIG. 3).

  Thereby, a communication session is established between the communication terminal 5a and the media data communication device 3a. Further, a communication session is established between the communication terminal 5b and the media data communication device 3b. Thereafter, each of the communication terminals 5a and 5b transmits a call control message to the communication control apparatus 2 as a communication session establishment completion notification indicating that the establishment of the communication session has been completed (steps S112a and S112b in FIG. 3).

  When exchanging a call control message for establishing a communication session, the communication control device 2 generates a unique session identifier (for identifying the communication session) for each communication session.

  Next, the user communication session control means 25 transmits a call control message to each of the communication terminals 4a, 4b, 5a and 5b as a communication session establishment completion notification indicating that the establishment of the communication session has been completed (FIG. 4). Step S113). The communication session establishment completion notification includes information representing a terminal identifier and an IP address of a communication terminal that is a communication partner.

  Next, the user communication session control means 25 newly stores the user communication session information of the started multimedia communication in the storage device (communication group information storage processing step, communication group information storage processing means). Thereby, the user communication session information management unit 24 manages the stored user communication session information (step S114 in FIG. 4).

  The user communication session information includes a multimedia communication identifier for identifying the started multimedia communication, the generated session identifier, the terminal identifiers of the communication terminals 4a, 4b, 5a, and 5b in which the communication session is established, and Information indicating the IP address, information indicating the device identifiers and IP addresses of the media data communication devices 3a and 3b with which the communication session has been established, and communication state information are included.

  Each communication terminal 4a, 4b, 5a, 5b receives a call control message as a communication session establishment completion notification. Thereby, the call control message processing means 42 of each communication terminal 4a, 4b, 5a, 5b is information included in the received call control message, and represents the terminal identifier and IP address of the communication terminal that is the communication partner. Information is newly stored in the storage device (steps S115a to S115d in FIG. 4).

  Next, the operation of the communication control system 100 in the case where one of the users of the communication terminal that performs multimedia communication suspends communication will be described in detail with reference to FIGS. 1, 5, and 6.

  First, a user who desires to hold communication (hereinafter referred to as user A) inputs a communication hold instruction by operating the input / output means 44 of the communication terminal 4a (or communication terminal 4b). Thereby, the call control message processing means 42 of the communication terminal 4a transmits a call control message as a communication hold instruction to the communication control device 2 (step S201 in FIG. 5). This communication hold instruction includes information representing a terminal identifier and an IP address of the transmission source communication terminal.

  Now, the communication terminals 4a and 5a and the media data communication device 3a communicate media data, and the communication terminals 4b and 5b and the media data communication device 3b communicate media data. The description will be continued assuming that multimedia communication is performed. Note that the number of communication terminals used for performing multimedia communication may be five or more, and the number of media data communication devices used for performing multimedia communication is three or more. Also good.

  Next, the call control message relay means 21 of the communication control device 2 receives the call control message. Then, the user communication session control unit 25 of the communication control device 2 accepts the call control message received by the call control message relay unit 21. Thereby, the user communication session control means 25 detects a change in the communication state of the communication terminal 4a (communication state detection step).

  The user communication session control unit 25 includes the terminal identifier and IP address of the transmission source communication terminal included in the received call control message in the user communication session information managed by the user communication session information management unit 24. User communication session information including information to represent is acquired. The user communication session control means 25 acquires (transmits) information representing terminal identifiers and IP addresses of all communication terminals used by the transmission source user (user A) based on the acquired user communication session information. (Identify all communication terminals used by the original user) (step S202 in FIG. 5, part of the communication control step).

  Next, the user communication session control means 25 is a call terminal (in this example, a communication terminal) other than the call terminal (that is, the communication terminal 4a) that has transmitted the call control message in step S201 among the specified communication terminals. 4b), a call control message (communication hold execution request) for requesting communication hold is transmitted via the call control message relay means 21 (step S203 in FIG. 5, part of the communication control step).

  Next, the call control message processing means 42 of the communication terminal 4a is a call control message whose destination is the communication terminal 5a that is a communication partner for communicating media data via the media data communication device 3a. The requested call control message (communication hold request) is transmitted to the communication control device 2 (step S204 in FIG. 5). This communication hold request includes information representing the terminal identifier and IP address of the communication terminal 4a.

  When receiving the call control message, the user communication session control means 25 of the communication control device 2 transmits the received call control message to the communication terminal 5a (step S205 in FIG. 5).

  In addition, the communication terminal 4b receives the communication hold execution request. Then, the call control message processing means 42 of the communication terminal 4b is a call control message having the communication terminal 5b which is a communication partner that communicates media data via the media data communication device 3b as a transmission destination. The requested call control message (communication hold request) is transmitted to the communication control device 2 (step S206 in FIG. 5). This communication hold request includes information representing the terminal identifier and IP address of the communication terminal 4b.

  When receiving the call control message, the user communication session control means 25 of the communication control device 2 transmits the received call control message to the communication terminal 5b (step S207 in FIG. 5).

  Each communication terminal 5a, 5b receives a call control message as a communication hold request. Each of the communication terminals 5a and 5b transmits a call control message as a communication hold permission response indicating that the communication hold is permitted to the communication control device 2 (steps S208a and S208b in FIG. 6).

  The call control message relay means 21 receives the communication hold permission response transmitted from each communication terminal 5a, 5b. Then, the user communication session control means 25 sends a temporary disconnection execution request indicating that the communication session with the media data communication apparatus 3a is temporarily disconnected via the call control message relay means 21 to the communication terminal 4a. As a call control message. Similarly, the user communication session control unit 25 performs temporary disconnection execution indicating that the communication session with the media data communication device 3b is temporarily disconnected to the communication terminal 4b via the call control message relay unit 21. A call control message as a request is transmitted (step S209 in FIG. 6, part of the communication control step).

  Each communication terminal 4a, 4b receives a call control message as a temporary disconnection execution request. Then, the communication terminal 4a exchanges a call control message for temporarily disconnecting the communication session with the media data communication device 3a via the communication control device 2 (step S210a in FIG. 6). Similarly, the communication terminal 4b exchanges a call control message for temporarily disconnecting the communication session with the media data communication device 3b via the communication control device 2 (step S210b in FIG. 6). .

  As a result, the communication session established between the communication terminal 4a and the media data communication device 3a is temporarily disconnected. Further, the communication session established between the communication terminal 4b and the media data communication device 3b is temporarily disconnected. Thereafter, each of the communication terminals 4a and 4b transmits a call control message to the communication control device 2 as a communication session temporary disconnection completion notification indicating that the communication session has been temporarily disconnected (steps S211a and S211b in FIG. 6). ).

  Thereafter, the user communication session control means 25 updates the user communication session information related to the multimedia communication being executed, which is acquired in step S202 (step S212 in FIG. 6).

  Next, the operation of the communication control system 100 when one of the users of the communication terminal performing multimedia communication transfers communication will be described in detail with reference to FIG. 1 and FIGS. 7 to 10. .

  First, a user who wishes to transfer communication (hereinafter referred to as user A) inputs a communication transfer instruction by operating the input / output means 44 of the communication terminal 4a (or communication terminal 4b). Thereby, the call control message processing means 42 of the communication terminal 4a transmits a call control message as a communication transfer instruction to the communication control apparatus 2 (step S301 in FIG. 7).

  This communication transfer instruction includes type information indicating the type of media data constituting the ongoing multimedia communication, a user identifier of the transfer destination user (user C in this example), and a terminal identifier of the communication terminal of the transmission source And information indicating the IP address.

  Now, the communication terminals 4a and 5a and the media data communication device 3a communicate media data, and the communication terminals 4b and 5b and the media data communication device 3b communicate media data. The description will be continued assuming that multimedia communication is performed. Note that the number of communication terminals used for performing multimedia communication may be five or more, and the number of media data communication devices used for performing multimedia communication is three or more. Also good.

  Next, the call control message relay means 21 of the communication control device 2 receives the call control message. Then, the user communication session control unit 25 of the communication control device 2 accepts the call control message received by the call control message relay unit 21. Thereby, the user communication session control means 25 detects a change in the communication state of the communication terminal 4a (communication state detection step).

  Then, the user communication session control unit 25 includes the type information included in the received call control message and the terminal information including the user identifier of the user C among the terminal information managed by the user terminal information management unit 22. Based on this, a communication terminal capable of processing the media data of the type represented by the type information is specified. In this example, the user communication session control means 25 specifies the communication terminal 6a and the communication terminal 6b (step S302 in FIG. 7).

  Note that the communication control device 2 is preferably configured to select one communication terminal from the plurality of communication terminals when there are a plurality of communication terminals capable of processing certain media data. In addition, when there is no communication terminal capable of processing certain media data, the communication control device 2 is preferably configured to notify the user of the communication terminal to that effect.

  Next, the user communication session control unit 25 of the communication control device 2 transmits the communication of the transmission source included in the received call control message in the user communication session information managed by the user communication session information management unit 24. User communication session information including information representing the terminal identifier and IP address of the terminal is acquired. The user communication session control means 25 acquires (transmits) information representing terminal identifiers and IP addresses of all communication terminals used by the transmission source user (user A) based on the acquired user communication session information. (Identify all communication terminals used by the original user) (step S303 in FIG. 7, part of the communication control step).

  Next, the user communication session control means 25 is a call terminal (in this example, a communication terminal) other than the call terminal (that is, the communication terminal 4a) that has transmitted the call control message in step S301 among the specified communication terminals. 4b), a call control message (communication end execution request) for requesting the end of communication is transmitted via call control message relay means 21 (step S304 in FIG. 7, part of the communication control step).

  Next, the call control message processing means 42 of the communication terminal 4a is a call control message with the communication terminal 5a, which is a communication partner that communicates media data via the media data communication device 3a, as a transmission destination, and terminates communication. The requested call control message (communication end request) is transmitted to the communication control apparatus 2 (step S305 in FIG. 7). This communication end request includes information representing the terminal identifier and IP address of the communication terminal 4a.

  When receiving the call control message, the user communication session control means 25 of the communication control device 2 transmits the received call control message to the communication terminal 5a (step S306 in FIG. 7).

  Further, the communication terminal 4b receives the communication end execution request. Then, the call control message processing means 42 of the communication terminal 4b is a call control message with the communication terminal 5b, which is a communication partner that communicates media data via the media data communication device 3b, as a transmission destination, and terminates communication. The requested call control message (communication end request) is transmitted to the communication control apparatus 2 (step S307 in FIG. 7). This communication end request includes information representing the terminal identifier and IP address of the communication terminal 4b.

  When receiving the call control message, the user communication session control means 25 of the communication control device 2 transmits the received call control message to the communication terminal 5b (step S308 in FIG. 7).

  Each communication terminal 5a, 5b receives a call control message as a communication end request. Each communication terminal 5a, 5b transmits a call control message as a communication end permission response indicating that the end of communication is permitted to the communication control device 2 (steps S309a, S309b in FIG. 8).

  The call control message relay means 21 receives the communication end permission response transmitted by each of the communication terminals 5a and 5b. Then, the user communication session control means 25, via the call control message relay means 21, calls control as a disconnection execution request indicating that the communication session with the media data communication device 3a is to be disconnected from the communication terminal 4a. Send a message. Similarly, the user communication session control unit 25 sends a call as a disconnection execution request indicating that the communication session with the media data communication device 3b is to be disconnected to the communication terminal 4b via the call control message relay unit 21. A control message is transmitted (step S310 in FIG. 8, part of the communication control step).

  Each communication terminal 4a, 4b receives a call control message as a disconnection execution request. Then, the communication terminal 4a exchanges a call control message for disconnecting the communication session with the media data communication device 3a via the communication control device 2 (step S311a in FIG. 8). Similarly, the communication terminal 4b exchanges a call control message for disconnecting the communication session with the media data communication device 3b via the communication control device 2 (step S311b in FIG. 8).

  As a result, the communication session established between the communication terminal 4a and the media data communication device 3a is disconnected. Further, the communication session established between the communication terminal 4b and the media data communication device 3b is disconnected. Thereafter, each of the communication terminals 4a and 4b transmits a call control message to the communication control device 2 as a communication session disconnection completion notification indicating that the communication session disconnection has been completed (steps S312a and S312b in FIG. 8).

  Next, the user communication session control unit 25 sends a call control message (requested to start communication) to the communication terminals 6a and 6b used by the user C, selected in step S302, via the call control message relay unit 21. (Communication start request) is transmitted (step S313 in FIG. 9).

  Each communication terminal 6a, 6b receives a communication start request. The communication terminals 6a and 6b notify the user C that the communication start request has been received via the input / output means 44. When the user C inputs a communication start permission instruction via the input / output means 44, the call control message processing means 42 of each of the communication terminals 6a and 6b calls control as a communication start permission response indicating that the start of communication is permitted. A message is transmitted to the communication control apparatus 2 (steps S314a and S314b in FIG. 9).

  As a result, the user communication session control means 25 accepts a call control message as a communication start permission response via the call control message relay means 21. Then, the user communication session control unit 25 transmits a call control message as a communication session establishment request including the resource information of the media data communication device 3a to the communication terminal 6a via the call control message relay unit 21.

  Further, the user communication session control unit 25 transmits a call control message as a communication session establishment request including the resource information of the media data communication device 3b to the communication terminal 6b via the call control message relay unit 21 (FIG. 9). Step S315).

  Each communication terminal 6a, 6b receives a call control message as a communication session establishment request. Then, the communication terminal 6a exchanges a call control message for establishing a communication session with the media data communication device 3a via the communication control device 2 (step S316a in FIG. 9). Similarly, the communication terminal 6b exchanges a call control message for establishing a communication session with the media data communication device 3b via the communication control device 2 (step S316b in FIG. 9).

  Thereby, a communication session is established between the communication terminal 6a and the media data communication device 3a. Further, a communication session is established between the communication terminal 6b and the media data communication device 3b. Thereafter, each of the communication terminals 6a and 6b transmits a call control message to the communication control device 2 as a communication session establishment completion notification indicating that the establishment of the communication session has been completed (steps S317a and S317b in FIG. 9).

  When exchanging a call control message for establishing a communication session, the communication control device 2 generates a unique session identifier (for identifying the communication session) for each communication session.

  Next, the user communication session control means 25 transmits a call control message to each of the communication terminals 5a, 5b, 6a, 6b as a communication session establishment completion notification indicating that the establishment of the communication session has been completed (FIG. 10). Step S318). The communication session establishment completion notification includes information representing a terminal identifier and an IP address of a communication terminal that is a communication partner.

  Next, the user communication session control means 25 updates the user communication session information of the multimedia communication being executed (step S319 in FIG. 10).

  Each communication terminal 5a, 5b, 6a, 6b receives a call control message as a communication session establishment completion notification. Thereby, the call control message processing means 42 of each communication terminal 5a, 5b, 6a, 6b is information included in the received call control message, and represents the terminal identifier and IP address of the communication terminal as the communication partner. Information is newly stored in the storage device (steps S320a to S320d in FIG. 10).

  As described above, according to the first embodiment of the communication control system of the present invention, when the communication state of one communication terminal among a plurality of communication terminals changes, the other associated with the communication terminal Control (change) the communication state of the communication terminal in conjunction with the communication terminal whose communication state has changed (start communication, end communication, hold communication, or transfer communication). it can.

  As a result, when one user performs multimedia communication using a plurality of communication terminals at the same time, the user simply inputs an instruction for changing the communication state to one communication terminal. The communication state of other communication terminals can also be changed. That is, the user can easily change the communication state of a plurality of communication terminals.

  That is, according to the first embodiment, when performing multimedia communication using a plurality of media data communication apparatuses 3a and 3b and a plurality of communication terminals that can be used by one user at the same time, communication start, communication Established individually between each media data communication device 3a, 3b and communication terminals 4a, 4b, 5a, 5b, 6a, 6b in response to changes in communication status such as hold, communication end or communication transfer It is possible to control a plurality of communication sessions in conjunction with each other. As a result, when the communication control system is applied to a large company or a communication carrier, a communication application capable of performing multimedia communication at any time by freely combining various media data and various communication terminals is realized. Can do.

<Second Embodiment>
Next, a communication control system according to a second embodiment of the present invention will be described in detail with reference to the drawings. The communication control system according to the second embodiment is configured so that only the communication terminal that has received the authentication information from the communication control apparatus can communicate with the media data communication apparatus. This is different from the first embodiment. Therefore, this difference will be mainly described below.

(Constitution)
As shown in FIG. 11, the user communication session control means 25 of the communication control apparatus 2 included in the communication control system 200 according to the second embodiment is the function of the user communication session control means 25 according to the first embodiment. In addition, it has a function of generating authentication token information (authentication information) and transmitting the generated authentication token information.

  Specifically, when establishing a communication session between the communication terminals 4a, 4b, 5a, 5b, 6a, 6b and the media data communication devices 3a, 3b, the user communication session control means 25 is specific to the communication session. Generate (unique) authentication token information. Then, the user communication session control unit 25 transmits the generated authentication token information to each of the communication terminal and the media data communication apparatus that are the targets for establishing the communication session.

  Further, the call control message processing means 42 of each communication terminal 4a, 4b, 5a, 5b, 6a, 6b receives the authentication token information in addition to the function of the call control message processing means 42 according to the first embodiment. And a function of transmitting the received authentication token information.

  Specifically, the call control message processing unit 42 receives the authentication token information from the communication control device 2. Then, the call control message processing means 42 transmits a call control message including the received authentication token information and a call control message for establishing a communication session to the media data communication devices 3a and 3b.

  Each of the media data communication devices 3a and 3b includes an authentication token information management unit 34 in addition to the configuration of the media data communication devices 3a and 3b according to the first embodiment.

  The authentication token information management unit 34 stores the authentication token information received from the communication control device 2 in the storage device. Further, the authentication token information management means 34 is stored in the storage device and the authentication token information included in the call control message for establishing a communication session with the communication terminals 4a, 4b, 5a, 5b, 6a, 6b. It is determined whether or not the current authentication token information (that is, the authentication token information received from the communication control device 2) corresponds (in this example).

  When the authentication token information management unit 34 determines that the two authentication token information are compatible, the authentication token information management unit 34 permits the establishment of the communication session, while determining that the two authentication token information is not compatible. In such a case, the establishment of the communication session is prohibited.

(Operation)
Next, the operation of the communication control system 200 when starting multimedia communication will be described in detail with reference to FIGS.

  Similar to the first embodiment, when a communication start instruction is input to the communication terminal 4a by the user A, the communication control system 200 performs steps S401 to S401 in FIG. 12 similarly to steps S101 to S106b in FIG. The process of step S406b is executed.

  As a result, the user communication session control means 25 accepts a call control message as a communication start permission response via the call control message relay means 21. Then, the user communication session control unit 25 generates unique authentication token information for each communication session (step S407 in FIG. 12).

  The authentication token information may be information unique to each multimedia communication. Further, the authentication token information may be information unique to each communication terminal. Further, the authentication token information may be information unique to each media data communication apparatus. Further, the authentication token information may be information unique to each combination of the communication terminal and the media data communication device.

  Then, the user communication session control means 25 transmits the generated authentication token information to each of the media data communication devices 3a and 3b specified in step S402 (step S408 in FIG. 13). Thereby, each media data communication apparatus 3a, 3b receives authentication token information. Then, the authentication token information management means 34 of each media data communication device 3a, 3b stores the received authentication token information in the storage device (steps S409a, S409b in FIG. 13).

  Next, the user communication session control means 25, via the call control message relay means 21, calls control message as a communication session establishment request including the resource information of the media data communication device 3a and the generated authentication token information. Is transmitted to the communication terminal 4a.

  Further, the user communication session control means 25 sends a call control message as a communication session establishment request including the resource information of the media data communication apparatus 3b and the generated authentication token information via the call control message relay means 21. Is transmitted to the communication terminal 4b (step S410 in FIG. 13, part of the communication control step).

  Each communication terminal 4a, 4b receives a call control message as a communication session establishment request. Then, the communication terminal 4a exchanges a call control message for establishing a communication session with the media data communication device 3a via the communication control device 2 (step S411a in FIG. 13). At this time, the communication terminal 4a transmits a call control message including the authentication token information received in step S410 to the media data communication device 3a.

  Thereby, the media data communication device 3a receives the authentication token information from the communication terminal 4a. The authentication token information management unit 34 of the media data communication device 3a corresponds to the received authentication token information and the authentication token information stored in the storage device (that is, the authentication token information received from the communication control device 2) ( In this example, it is determined whether or not they match.

  If the authentication token information management unit 34 determines that the two authentication token information are compatible, the authentication token information management unit 34 permits establishment of a communication session with the communication terminal 4a. If it is determined that the communication session is not supported, the establishment of the communication session is prohibited.

  Similarly, the communication terminal 4b exchanges a call control message for establishing a communication session with the media data communication device 3b via the communication control device 2 (step S411b in FIG. 13). At this time, the communication terminal 4b transmits a call control message including the authentication token information received in step S410 to the media data communication device 3b.

  As a result, the media data communication device 3b receives the authentication token information from the communication terminal 4b. The authentication token information management unit 34 of the media data communication device 3b corresponds to the received authentication token information and the authentication token information stored in the storage device (that is, the authentication token information received from the communication control device 2) ( In this example, it is determined whether or not they match.

  If the authentication token information management unit 34 determines that the two authentication token information are compatible, the authentication token information management unit 34 permits establishment of a communication session with the communication terminal 4b, while the two authentication token information If it is determined that the communication session is not supported, the establishment of the communication session is prohibited.

  Now, the description will be continued assuming that the authentication token information management means 34 of each media data communication device 3a, 3b permits establishment of a communication session. In this case, a communication session is established between the communication terminal 4a and the media data communication device 3a. Further, a communication session is established between the communication terminal 4b and the media data communication device 3b.

  Thereafter, the communication control system 200 executes the processes of steps S412a to S418d of FIGS. 13 and 14 in the same manner as steps S109a to S115d of FIGS.

As described above, according to the second embodiment of the communication control system of the present invention, the same operations and effects as those of the first embodiment can be achieved.
Furthermore, according to the second embodiment, only the communication terminals 4a, 4b, 5a, 5b, 6a, and 6b that have received the authentication information from the communication control device 2 communicate with the media data communication devices 3a and 3b. be able to. That is, it is possible to prevent the communication terminals 4a, 4b, 5a, 5b, 6a and 6b from communicating by unauthorized access to the media data communication devices 3a and 3b.

  That is, according to the second embodiment, the communication terminals 4a, 4b, 5a, 5b, 6a, 6b that can establish a communication session with the media data communication devices 3a, 3b are transferred to the regular communication terminals 4a, It becomes possible to limit only to 4b, 5a, 5b, 6a, 6b. As a result, when the communication control system 200 is applied to a telecommunications carrier, multimedia communication can be safely performed even if there is a relatively high possibility of unauthorized access from a third party who is not a related party. Become.

  In addition, this invention is not limited to said each embodiment, A various modification can be employ | adopted within the scope of the present invention. For example, in each of the above embodiments, the functions of the communication control systems 100 and 200 are realized by the CPU executing a program (software), but may be realized by hardware such as a circuit.

  As illustrated in FIG. 15, the communication control apparatus 500 according to the modification of each of the above embodiments includes a communication group information storage unit 501, a communication state detection unit 502, and a communication control unit 503.

The communication group information storage unit 501 stores communication group information including a plurality of terminal identifiers for identifying communication terminals.
The communication state detection unit 502 detects a change in the communication state of the communication terminal.

When a change in the communication state of a communication terminal is detected by the communication state detection unit 502, the communication control unit 503 is identified by another terminal identifier included in communication group information including a terminal identifier for identifying the communication terminal. Control the communication status of the communication terminal.
Also by this modification, the same operation and effect as the above-mentioned each embodiment can be produced.

  In addition, as another modified example of the above-described embodiment, any combination of the above-described embodiments and modified examples may be employed.

  The present invention can be applied to a communication system or the like for realizing multimedia communication between communication terminals performed via a network and a call control device.

DESCRIPTION OF SYMBOLS 1 Network 2 Communication control apparatus 3a, 3b Media data communication apparatus 4a, 4b, 5a, 5b, 6a, 6b Communication terminal 21 Call control message relay means 22 User terminal information management means 23 Media data communication apparatus information management means 24 User communication session Information management means 25 User communication session control means 31 Communication means 32 Call control message processing means 33 Media data processing means 34 Authentication token information management means 41 Communication means 42 Call control message processing means 43 Media data processing means 44 Input / output means 100 Communication control System 200 Communication control system 500 Communication control device 501 Communication group information storage means 502 Communication state detection means 503 Communication control means

Claims (20)

Communication group information storage means for storing communication group information including a plurality of terminal identifiers for identifying communication terminals;
Communication state detecting means for detecting a change in the communication state of the communication terminal;
Communication control for controlling a communication state of a communication terminal identified by another terminal identifier included in communication group information including a terminal identifier for identifying the communication terminal when a change in the communication state of the communication terminal is detected Means,
A communication control device comprising: The communication control device according to claim 1,
The communication group information storage means is configured to store information associating a user identifier for identifying a user with the plurality of terminal identifiers as the communication group information. The communication control device according to claim 1 or 2,
The communication group information storage means, when a communication session is established for each of the plurality of communication terminals in order to perform multimedia communication for communicating a plurality of media data, A communication control device configured to store information associating a media communication identifier with a plurality of terminal identifiers for identifying each of the plurality of communication terminals as the communication group information. The communication control device according to any one of claims 1 to 3,
The communication control unit configured to detect a change in a communication state of the communication terminal by receiving a change instruction for changing the communication state from the communication terminal. The communication control device according to claim 4,
The communication control means includes a terminal identifier for identifying a communication terminal when the communication state detecting means receives a communication start instruction as an instruction to start communication from the communication terminal as the change instruction. A communication control apparatus for controlling a communication state of a communication terminal so as to newly establish a communication session for a communication terminal identified by another terminal identifier included in the group information. The communication control device according to claim 4,
The communication control unit includes a terminal identifier for identifying a communication terminal when the communication state detection unit receives a communication end instruction as an instruction to end communication from the communication terminal as the change instruction. A communication control device that controls a communication state of a communication terminal so as to disconnect a communication session established with respect to the communication terminal identified by another terminal identifier included in the group information. The communication control device according to claim 4,
The communication control means includes a communication group including a terminal identifier for identifying the communication terminal when the communication status detecting means receives a hold instruction for instructing to hold communication from the communication terminal as the change instruction. A communication control apparatus for controlling a communication state of a communication terminal so as to temporarily disconnect a communication session established with respect to the communication terminal identified by another terminal identifier included in the information. The communication control device according to claim 4,
The communication control means includes a communication group including a terminal identifier for identifying the communication terminal when the communication state detection means receives a transfer instruction indicating that the communication is transferred from the communication terminal as the change instruction. The communication status of the communication terminal is controlled so as to disconnect the communication session established with respect to the communication terminal identified by the other terminal identifier included in the information, and the transfer destination terminal identifier included in the transfer instruction The communication state of the communication terminal is controlled so that a communication session is established for each of the communication terminal identified by the communication terminal and the communication terminal identified by the other terminal identifier included in the communication group information including the terminal identifier. Communication control device. The communication control device according to any one of claims 1 to 8,
The communication control device is configured to control communication between the communication terminal and a media data communication device capable of communicating the media data. A communication state detection step of detecting a change in the communication state of the communication terminal;
Of the communication group information stored in a storage device that stores communication group information including a plurality of terminal identifiers for identifying the communication terminal, a communication terminal in which a change in the communication state is detected in the communication state detection step A communication control step of controlling the communication state of the communication terminal identified by the other terminal identifier included in the communication group information including the terminal identifier for identifying
Including a communication control method. The communication control method according to claim 10, comprising:
The communication control method, wherein the communication group information is information in which a user identifier for identifying a user is associated with the plurality of terminal identifiers. The communication control method according to claim 10 or 11,
When a communication session is established for each of the plurality of communication terminals to perform multimedia communication for communicating a plurality of media data, a multimedia communication identifier for identifying the multimedia communication, A communication control method including a communication group information storage processing step of storing information associating a plurality of terminal identifiers for identifying each of the communication terminals in the storage device as the communication group information. In the communication control device,
Communication state detecting means for detecting a change in the communication state of the communication terminal;
Of communication group information stored in a storage device that stores communication group information including a plurality of terminal identifiers for identifying the communication terminal, a communication terminal in which a change in communication state is detected by the communication state detection means Communication control means for controlling the communication state of a communication terminal identified by another terminal identifier included in communication group information including a terminal identifier for identification;
A program to realize The program according to claim 13,
The communication group information is a program in which a user identifier for identifying a user is associated with the plurality of terminal identifiers. The program according to claim 13 or 14,
In addition to the communication control device,
When a communication session is established for each of the plurality of communication terminals to perform multimedia communication for communicating a plurality of media data, a multimedia communication identifier for identifying the multimedia communication, A program for realizing communication group information storage processing means for storing information associating a plurality of terminal identifiers for identifying each communication terminal in the storage device as the communication group information. A communication control system including a plurality of communication terminals, a media data communication device capable of communicating media data, and a communication control device that controls communication between the communication terminal and the media data communication device,
The communication control device includes:
Communication group information storage means for storing communication group information including a plurality of terminal identifiers for identifying the communication terminals;
Communication state detecting means for detecting a change in the communication state of the communication terminal;
Communication control for controlling a communication state of a communication terminal identified by another terminal identifier included in communication group information including a terminal identifier for identifying the communication terminal when a change in the communication state of the communication terminal is detected Means,
A communication control system comprising: The communication control system according to claim 16, comprising:
The communication control system configured to store information associating a user identifier for identifying a user with the plurality of terminal identifiers as the communication group information. The communication control system according to claim 16 or 17,
The communication group information storage means, when a communication session is established for each of the plurality of communication terminals in order to perform multimedia communication for communicating a plurality of media data, A communication control system configured to store information in which a media communication identifier and a plurality of terminal identifiers for identifying each of the plurality of communication terminals are associated with each other as the communication group information. The communication control system according to any one of claims 16 to 18, comprising:
The communication terminal is configured to transmit a change instruction for changing a communication state of the communication terminal to the communication control device according to information input by a user,
The communication control system configured to detect a change in a communication state of the communication terminal when the communication control device receives the change instruction from the communication terminal. The communication control system according to any one of claims 16 to 19,
The communication control device is configured to transmit predetermined authentication information to each of the communication terminal and the media data communication device when establishing a communication session between the communication terminal and the media data communication device. ,
The communication terminal is configured to receive the authentication information and to transmit a message including the received authentication information to establish a communication session to the media data communication device;
The media data communication device is configured to permit communication with the communication terminal when the authentication information received from the communication control device and the authentication information received from the communication terminal correspond to each other. Communication control system.

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