JP2002218069A - Session establisher and session establishment system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To establish easily a session without designating a counterpart station by a telephone number or obtaining in advance an address of a communication counterpart. SOLUTION: A control unit of a session server registers associated information and a unicast address transmitted from a picture transmitter/receiver in a session establishment database (step ST1). The control unit stands by until receiving a retrieval condition signal (step ST2), and when it receives the retrieval condition signal, it searches the session establishment database for the associated information corresponding to the retrieval conditions, and presents the unicast address which agrees with the retrieval conditions to the picture transmitter/receiver (step ST3).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a session establishing apparatus and a session establishing system, and more particularly to a session establishing apparatus and a session establishing system suitable for establishing a session in a remote video conference system.

[0002]

2. Description of the Related Art
2. Description of the Related Art There has been proposed a video conference system in which a conference is performed using video transmitting / receiving apparatuses installed at sites separated from each other. In such a video conference system, as shown in FIG.
One video transmitting / receiving apparatus 50 calls the telephone number of a station connected to another video transmitting / receiving apparatus 60, and then notifies its own unicast address or multicast address to the other party to establish a session.

[0003] For this reason, there is a risk that inputting a unicast address or a multicast address is complicated or that an incorrect address is input. Further, a new unicast address or the like has to be input every time the location of the conference room of the communication partner changes, so that there is a problem that it is difficult to follow a situation change.

On the other hand, current data exchange networks, such as the Internet, have been increased in speed, bandwidth, and functionality. With the development of higher speed and wider bandwidth, real-time transmission and reception of voice and images has become possible. Further, as a part of the enhancement of functions, not only unicast communication for one-to-one communication but also one-to-many multicast communication for simultaneously distributing data packets to a plurality of specific receiving stations has become possible. Accordingly, video (moving images and audio) and accompanying data can be efficiently exchanged on a packet-switched network.

However, in such a data exchange type network, a session establishment method in which a partner station is designated by a telephone number as in a conventional video conference system cannot be applied, and a new method is required. Becomes In particular, the establishment of a session for using multicast that enables broadcasting to a specific large number without increasing the load on the network is of great importance as a connection technique.

SUMMARY OF THE INVENTION The present invention has been proposed to solve the above-mentioned problem, and is intended to easily establish a session without specifying a partner station by a telephone number or acquiring an address of a communication partner in advance. It is an object of the present invention to provide a session establishment apparatus and a session establishment system which can perform the above-mentioned operations.

[0007]

In order to solve the above-mentioned problems, a session establishing apparatus according to the present invention stores, for each terminal device, an address specifying a terminal device and related information relating to the terminal device. Storage means for storing, search condition receiving means for receiving a search condition for searching for a predetermined terminal device, and search condition received by the search condition receiving means from among the related information stored in the storage means And a transmitting unit that transmits an address of a terminal device corresponding to the relevant information searched by the searching unit to a transmission source of the search condition.

[0008] The storage means stores an address for specifying the terminal device and related information used when searching for the terminal device. The address referred to here may be a unicast address used in unicast communication or a multicast address used in multicast communication. The search unit searches for related information that matches the search condition from among the related information stored in the storage unit. It should be noted that whether the search condition is met is not limited to a perfect match but may be a partial match. Then, the transmitting unit transmits the address corresponding to the searched related information to the transmission source of the search condition.

Here, the related information searched by the search means is:
The number is not limited to one, and any number that matches the search condition may be used. When there is a plurality of pieces of related information that match the search condition, a list of each related information may be presented to the transmission source of the search condition. Then, the transmitting means may transmit the address of the terminal device selected by the transmission source.

[0010] Thus, each terminal device can easily establish a session with a desired terminal device without acquiring the address of the communication partner in advance.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings.

[First Embodiment] As shown in FIG.
Video conference system 1 according to the first embodiment of the present invention
.. Perform unicast communication in which one of the video transmitting and receiving apparatuses 10A, 10B, 10C,... Note that the video transmitting and receiving apparatuses 10A,
, B, 10C,... Have the same configuration, and the common features of the video transmitting / receiving apparatuses 10A, 10B, 10C,.

Here, each video transmitting / receiving device 10 is assigned a unicast address. Therefore, the video conference system 1 includes the session server 30 so that the video transmitting / receiving device 10 on the calling side can acquire the unicast address of the communication partner when establishing a unicast communication session.

More specifically, the video conference system 1 includes a plurality of video transmission / reception devices 10 for photographing a video of a conference base or displaying a video of another conference base, and a session server 30 connected to the Internet 20. It has.
Each of the video transmitting / receiving apparatuses 10 and the session server 30 are connected via the Internet 20, and can transmit and receive various information through mutual communication.

As shown in FIG. 2, the video transmitting / receiving device 10 includes an input / output port 11 for inputting / outputting data via the Internet 20, a camera 12 for capturing a video of a conference base, and a pointing device or a keyboard. An input unit 13, a display unit 14 for displaying an image, a control unit 15 for controlling the overall operation, a hard disk drive 16 for storing data, and a bus 17 for connecting each unit.

The camera 12 captures a video of a conference base where the video transmitting / receiving device 10 is installed, and generates video data and audio data.

The input unit 13 inputs a state (for example, an installation place, a name of a conference, a participant of the conference) and a search condition accompanying the activation of the video transmission / reception device 10, and inputs from a list of addresses presented from the session server 30. Used when selecting a desired address.

The display unit 14 includes, for example, a liquid crystal display,
A CRT display, an EL display, a plasma display, and a television receiver can be applied. Further, a so-called touch panel having the functions of the input unit 13 and the display unit 14 may be used.

The control unit 15 transmits, for example, video data and audio data captured by the camera 12 to a predetermined video transmission / reception device 10 via the input / output port 11,
Display unit 1 based on data received at input / output port 11
4 is displayed in a predetermined manner.

As shown in FIG. 3, the session server 30 stores an input / output port 31 for inputting / outputting various information to / from the Internet 20 and data for establishing a session for unicast communication. The system includes a session establishment database 32, a session monitoring database 33 storing data for monitoring an established session, a control unit 34 for controlling the overall operation, and a bus 35 for interconnecting these.

Although not shown, the session server 30 also includes input devices such as a keyboard and a mouse for inputting various information, and a monitor for displaying various menu screens and processing results.

The session establishment database 32 is shown in FIG.
As shown in FIG. 2, data of "base number", "unicast address", "base name", "meeting name", "participant", and "keyword" are described.

The "base number" is a serial number of the video transmitting / receiving apparatus 10 installed at the conference base, and indicates, for example, the order of registration. The “unicast address” is a unicast address of the video transmitting / receiving device 10 installed at the conference base. The “base name” is the name of the location of the conference base, and corresponds to, for example, a certain building and a certain conference room. “Meeting name” is the name of the meeting held at the meeting base. “Participant” is the name or name of a person who participates in a conference held at the base. The “keyword” describes a word related to the meeting. Therefore, the “keyword” is suitable for use when the “base name”, “meeting name”, and “participant” are unclear, and is related to the “base name”, the “meeting name”, and the like. Indicates a word.

The session monitoring database 33 is shown in FIG.
As shown in FIG. 7, data of "session number", two "base numbers", "start time", and "end time" are described.

The "session number" is a serial number indicating the order in which the session was established and the unicast communication was started. The two “base numbers” indicate respective base numbers when a session is established and unicast communication is performed. “Start time” is the time at which the unicast communication was started. “End time” is the time when the unicast communication ends. If the unicast communication is still performed, the “end time” is not described.

In the video conference system 1 configured as described above, the video transmitting / receiving device 1 for performing unicast communication
When newly adding 0, the following processing is executed.

Here, the video transmitting / receiving device 1 at the conference base A
Assume that 0A is already registered as the base number 9 in the session server 30, a video transmitting / receiving apparatus 10B is newly installed at the conference base B, and the video transmitting / receiving apparatus 10A makes a call to the video transmitting / receiving apparatus 10B. I do.

First, the operator operates the video transmitting / receiving device 1
0B is installed at the conference base B, the video transmitting / receiving device 10B
By operating the input unit 13B, the relevant information related to the conference base B is input to the video transmitting / receiving device 10B. Related information
The information to be stored in the session establishment database 32, specifically, as shown in FIG. 6, a location (base name), a conference name, main participants, keywords indicating the content of the discussion, and the like. . Here, the operator of the conference base B includes “base name”, “conference name”, “participant”,
As "keywords", "Marunouchi Building 4th Conference Room", "Strategy Conference", "Hanako", "Market Research, Connection Speed" are input. Since the unicast address is automatically extracted, the operator does not need to input the unicast address.

The control unit 15B of the video transmitting / receiving device 10B
The related information input from the input unit 13B is stored in the hard disk drive 16B. After that, the control unit 15B
When a transmission command of related information is input from the input unit 13B,
The related information stored in the hard disk drive 16B is read and transmitted to the session server 30 via the input / output port 11B.

The control unit 3 of the session server 30
4 receives the relevant information from the video transmitting / receiving device 10B, and executes the processing from step ST1 shown in FIG.

In step ST1, the control unit 34
The related information and the unicast address are registered, and the process proceeds to step ST2.

More specifically, upon receiving the related information, the control unit 34 newly adds a base number, describes the related information in the item of the added base number, and registers it in the session establishment database 32. At this time, the control unit 34 extracts the unicast address attached to the related information, describes the unicast address in the item of the added base number, and registers it in the session establishment database 32.

As a result, the session establishment database 3
In FIG. 2, for example, as shown in FIG. 8, the unicast address (92.168.0.4) of the video transmitting / receiving device 10B is described in the “unicast address” of the base number 11, and the “base name” of the base number 11 is further described. , "Meeting name", "participant", and "keyword" describe related information.

On the other hand, the operator at the conference site A operates the input unit 13A of the video transmission / reception device 10A to input a search condition in order to obtain the unicast address of the video transmission / reception device 10B installed at the conference site B. . The search condition is
Some items or only some words of the related information may be used. Here, it is assumed that the operator has input "Marunouchi" as the "base name" and "* strategy *" as the "conference name", as shown in FIG. 9, for example. Note that "*" indicates an arbitrary character string, that is, a so-called wild card.

The control unit 15A of the video transmitting / receiving device 10A
When a search condition is input from the input unit 13A, a search condition signal requesting execution of a search according to the search condition is transmitted to the session server 30 via the input / output port 11A.

In step ST2, control unit 34 of session server 30 determines whether a search condition signal has been received, and waits in step ST2 until a search condition signal is received. When it is determined that the search condition signal has been received, the process proceeds to step ST3.

At step ST3, the control unit 34
The search is performed based on the search condition signal, a list of unicast addresses that match the search condition is presented, and the process proceeds to step ST4.

More specifically, the control unit 34 performs a search based on the search condition signal. In this case, the “base name” includes “Marunouchi” and the “conference name” includes “strategy”. The session number including the base number is searched from the session establishment database 32. Then, the control unit 34 selects all the site numbers that match the search condition, and transmits information on the selected site numbers to the video transmitting / receiving device 10A via the input / output port 31.

The control unit 15A of the video transmitting / receiving device 10A
When the information regarding the base number is received at the input / output port 11A, a list of unicast addresses of the information regarding the base number is displayed on the display unit 14A, for example, as shown in FIG. Thereby, the operator of the conference site A can confirm the related information and the unicast address of the site that matches the search condition.

When the operator at the conference site A operates the input unit 13A to select a communication partner from the list, the control unit 15A issues a unicast address request signal for requesting the unicast address of the selected communication partner. To the session server 3 via the input / output port 11A.
Send to 0.

When the control unit 34 of the session server 30 receives the unicast address request signal, it reads out the unicast address indicated by the unicast address request signal from the session establishment database 32 and returns it to the video transmitting / receiving device 10A. Thereby, the video transmitting / receiving apparatus 10A can establish a session with the video transmitting / receiving apparatus 10B using the transmitted unicast address, and as shown in FIG. It can be performed.

In step ST4, when the video transmission / reception device 10A and the video transmission / reception device 10B start unicast communication, the control section 34 of the session server 30 monitors the start and end of the session and ends the processing.

Specifically, when the video transmitting / receiving device 10A and the video transmitting / receiving device 10B start unicast communication, the control unit 34 newly stores a session number (for example, “ 3)). Then, the base numbers of the video transmitting / receiving apparatuses 10A and 10B are described in the two “base numbers” of the added session numbers, and the time at which the unicast communication is started is described in the “start time”.

When the session between the video transmitting / receiving apparatus 10A and the video transmitting / receiving apparatus 10B is disconnected, the control unit 34
Describes the time at which the session was disconnected and the unicast communication was terminated in the "end time", and the process ends.

When calculating the usage fee (charging) of the video transmission / reception device 10A at the conference base A and the video transmission / reception device 10B at the conference base B, the control unit 34 sets the “start time” described in the session monitoring database 33. "
Then, the usage time is calculated from the “end time” and the usage fee is calculated based on the calculated usage time. The usage fee may be calculated in consideration of the amount of data transmitted and received between the video transmitting / receiving device 10A and the video transmitting / receiving device 10B.

As described above, the video conference system 1
Even if the unicast address of the other party is not known in advance, the search condition for identifying the other party is transmitted to the session server 30 to obtain information matching the search condition, and the unicast address of the other party in the conference is obtained. Can be obtained. For this reason, the operator can save the trouble of inputting the unicast address of the communication partner, and can avoid the input error of the unicast address which has conventionally occurred.

Even when the conference base of the video transmission / reception device 10 moves, the operator of the video transmission / reception device 10 only needs to register the relevant information in the session server 30. Can save the trouble of redoing the operation settings.

Further, the video conference system 1 allows the session server 30 to monitor the state of the unicast communication, so that the accounting according to the communication state between the video transmitting / receiving apparatuses 10 can be easily calculated.

[Second Embodiment] Next, a second embodiment of the present invention will be described. Note that the video conference system according to the second embodiment has substantially the same configuration as that of the first embodiment, and a detailed description of overlapping parts will be omitted.

In the video conference system 1 according to the second embodiment, the video transmitting / receiving apparatus 10 performs multicast communication in which one-to-many video is transmitted / received.

In this case, the video transmitting / receiving device 10 transmits data to a multicast address instead of transmitting data to a unicast address of a communication partner. Therefore, the video conference system 1 includes a session server 30 so that the video transmitting / receiving device 10 on the calling side can acquire the multicast address of the communication partner when establishing a multicast communication session.

Here, the session server 30 according to the present embodiment stores an input / output port 31 for inputting / outputting various information with the Internet 20 and data for establishing a session for multicast communication. A session establishment database 32, a control unit 34 for controlling the overall operation, and a bus 35 for interconnecting them.

The session establishment database 32 is shown in FIG.
As shown in FIG. 3, “base number”, “multicast address”, “base name”, “meeting name”, “participant”,
It is configured so that data of “keyword” is described. The “multicast address” is an address of a host computer (not shown) of a group to which the video transmitting / receiving device 10 installed at the conference base belongs. Upon receiving the data, the host computer distributes the data to each of the video transmitting / receiving apparatuses 10 in the group. The “base number”, “base name”, “meeting name”, “participant”, and “keyword” are the same as in the first embodiment.

In the video conference system 1 configured as described above, when a video transmitting / receiving device 10 for performing multicast communication is newly added, the following processing is executed.

Here, it is assumed that the video transmitting / receiving apparatuses 10A and 10B at the conference bases A and B have already been registered in the session server 30, and a new video transmitting / receiving apparatus 10C is installed at the conference base C. A case where a call is made to the video transmitting / receiving device 10C will be described.

First, the operator sets the video transmitting / receiving device 1
When 0C is installed at the conference base C, the video transmitting / receiving device 10C
By operating the input unit 13C, the relevant information related to the conference base C is input to the video transmitting / receiving device 10C. Related information
More specifically, as shown in FIG. 14, the locations are “base name”, “meeting name”, “participant”, “keyword”, and “address”.

Here, as shown in FIG. 14, for example, the operator of the conference base C may be referred to as a “base name”, a “conference name”, a “participant”, and a “keyword”.
Enter "Otemachi Building 6F Conference Room", "Internet Forum", "Taro, Hanako", and "Personal Information". Further, the operator sets the “address” to the video transmitting / receiving device 10.
Enter the multicast address of C.

The control unit 15C of the video transmitting / receiving device 10C
The related information input from the input unit 13C is stored in the hard disk drive 16C. After that, the control unit 15C
When a transmission command of related information is input from the input unit 13C,
The related information stored in the hard disk drive 16C is read and transmitted to the session server 30 via the input / output port 11C.

Then, the control unit 3 of the session server 30
4 receives the relevant information from the video transmission / reception device 10C, and executes the processing of step ST11 and subsequent steps shown in FIG.

In step ST11, the control unit 34
Registers the related information and the multicast address, and proceeds to step ST12. Specifically, the control unit 34
Receives the relevant information, adds a new base number,
The related information is described in the item of the added base number and registered in the session establishment database 32. At this time, the control unit 34 also describes the multicast address in the item of the added base number, and
Register in 2.

As a result, the session establishment database 3
In FIG. 2, for example, as shown in FIG.
"Unicast address" of the video transmitting / receiving device 10C as the multicast address (fle :: 1399: 122).
2) is described, and a “base name” of the base number 22;
Related information is described in “meeting name”, “participant”, and “keyword”.

On the other hand, the operator at the conference site A operates the input unit 13A of the video transmission / reception device 10A to input a search condition in order to obtain the multicast address of the video transmission / reception device 10C installed at the conference site C. The search condition may be only some items or some words of the related information.
Here, the operator, for example, as shown in FIG.
It is assumed that "* Internet *" is input as "meeting name" and "strategy" is input as "keyword".

The control unit 15A of the video transmitting / receiving device 10A
When a search condition is input from the input unit 13A, a search condition signal requesting execution of a search according to the search condition is transmitted to the session server 30 via the input / output port 11A.

In step ST12, control unit 34 of session server 30 determines whether or not a search condition signal has been received.
To wait. When it is determined that the search condition signal has been received, the process proceeds to step ST13.

In step ST13, the control unit 34
Performs a search based on the search condition signal and presents a list of multicast addresses that match the search condition,
The process moves to step ST14.

More specifically, the control unit 34 performs a search based on the search condition signal. In this case, the “conference name” includes “Internet” and the “keyword” includes “strategy”. The base number is searched from the session establishment database 32. Then, the control unit 34 selects all the site numbers that match the search condition, and transmits information on the selected site numbers to the video transmitting / receiving device 10A via the input / output port 31.

The control unit 15A of the video transmitting / receiving device 10A
When the information regarding the site number is received at the input / output port 11A, a list of the multicast addresses of the information regarding the site number is displayed on the display unit 14A, for example, as shown in FIG. Thus, the operator of the conference site A can check the related information and the multicast address of the site that matches the search condition.

When the operator at the conference site A operates the input unit 13A to select a communication partner from the list, the control unit 15A sends a multicast address request signal for requesting the multicast address of the selected communication partner. The data is transmitted to the session server 30 via the input / output port 11A.

Upon receiving the multicast address request signal, the control unit 34 of the session server 30 reads the multicast address indicated by the multicast address request signal from the session establishment database 32,
Reply to video transmitting / receiving device 10A. Thereby, the video transmission / reception device 10A can establish a session with the video transmission / reception device 10C using the transmitted multicast address, and as shown in FIG.
Multicast communication can be performed with the OC and the like.

As described above, the video conference system 1
Even if the multicast address of the other party is not known in advance, by sending search conditions for specifying the other party to the session server 30, information matching the search conditions is obtained, and the multicast address of the other party in the conference is obtained. be able to. For this reason, the operator can save the trouble of inputting the multicast address of the communication partner, and can avoid an input error of the multicast address.

In this embodiment, the session server 30 does not monitor the session in the multicast communication. However, in the same manner as in the first embodiment,
The start time and the end time of the multicast communication may be monitored. Thereby, it is possible to charge the video transmitting / receiving device 10 performing the multicast communication.

Further, in the first and second embodiments,
The session server 30 sends the address after presenting the list of addresses that match the search condition. However, if the session server 30 can search for an address that completely matches the search condition,
The address may be transmitted without presenting the list.

Further, in the above-described embodiment, the present invention has been described as applied to the video conference system 1. Therefore, the related information such as “base name”, “conference name”, “participant”,
Although “keyword” is shown, the related information is not limited to these. For example, when the present invention is applied to a remote television lecture, related information includes “classroom name”, “building name” where the classroom exists, “course name”, “community name”, “teacher name or name”. Can be used.

[0074]

According to the present invention, the related information stored in the storage means is searched for related information matching the search condition, and the address of the terminal device corresponding to the searched related information is determined by the source of the search condition. , Each terminal device can easily establish a session without acquiring the address of the communication partner in advance.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a video conference system according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration of a video transmitting / receiving device of the video conference system.

FIG. 3 is a block diagram illustrating a configuration of a session server of the video conference system.

FIG. 4 is a diagram showing a configuration of a session establishment database.

FIG. 5 is a diagram showing a configuration of a session monitoring database.

FIG. 6 is a diagram illustrating an example of related information of a video transmitting / receiving device that performs unicast communication.

FIG. 7 is a flowchart illustrating an operation procedure of the session server.

FIG. 8 is a diagram illustrating an example of data described in a session establishment database.

FIG. 9 is a diagram illustrating an example of a search condition.

FIG. 10 is a diagram showing an example of a search result.

FIG. 11 is a diagram illustrating a state in which the video transmitting / receiving device is performing unicast communication.

FIG. 12 is a diagram showing an example of data described in a session monitoring database.

FIG. 13 is a diagram showing a configuration of a session establishment database according to the second embodiment.

FIG. 14 is a diagram illustrating an example of related information of the video transmitting / receiving device.

FIG. 15 is a flowchart illustrating an operation procedure of the session server.

FIG. 16 is a diagram showing an example of data described in a session establishment database.

FIG. 17 is a diagram illustrating an example of a search condition.

FIG. 18 is a diagram illustrating an example of a search result.

FIG. 19 is a diagram illustrating a state in which the video transmitting / receiving device is performing multicast communication.

FIG. 20 is a diagram illustrating a conventional session establishment method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Video conference system 10 Video transmission / reception apparatus 30 Session server 31 I / O port 32 Session establishment database 33 Session monitoring database 34 Control part

Claims (10)

[Claims] 1. A storage unit for storing, for each terminal device, an address for specifying the terminal device and related information related to the terminal device, and a search condition for receiving a search condition for searching for a predetermined terminal device. Receiving means; searching means for searching for related information that matches the search condition received by the search condition receiving means from the related information stored in the storage means; A transmission means for transmitting an address of a corresponding terminal device to a transmission source of the search condition. 2. The session establishing apparatus according to claim 1, further comprising a charging unit for charging a usage fee based on a duration of the session established by transmitting the address by the transmitting unit. 3. The storage unit stores an installation location of the terminal device as the related information, and the search unit is received by the search condition reception unit from among the installation locations stored in the storage unit. The session establishment device according to claim 1, wherein an installation location that matches a search condition is searched. 4. The storage means stores a conference name of a conference using a terminal device as the related information, and the retrieval means retrieves the search condition from among the conference names stored in the storage means. 4. The session establishment device according to claim 1, wherein a search is made for a meeting name that matches the search condition received in step (c). 5. The storage unit stores, as the related information, names of persons who participate in a conference using a terminal device, and the search unit includes the search condition receiving unit from among the names stored in the storage unit. The session establishment apparatus according to claim 1, wherein a search is made for a person name that matches the search condition received in step (c). 6. A storage unit for storing, for each terminal device, an address for specifying the terminal device and related information relating to the terminal device, and a search condition for receiving a search condition for searching for a predetermined terminal device. Receiving means, and a search means for searching for related information matching the search condition received by the search condition receiving means from among the related information stored in the storage means,
Transmitting means for transmitting the address of the terminal device corresponding to the related information searched by the searching means to the transmission source of the search condition; and searching the session establishing device for a predetermined terminal device. Transmitting means for transmitting search conditions for receiving, receiving means for receiving an address from the session establishing device, and session establishing means for establishing a session with the predetermined terminal device using the address received by the receiving means; And a plurality of terminal devices comprising: a session establishment system comprising: 7. The session establishment system according to claim 6, wherein the session establishment device further comprises a charging unit for charging a usage fee based on a duration of the session established by transmitting the address by the transmission unit. . 8. The storage device of the session establishment device stores a location of a terminal device as the related information,
8. The session establishment system according to claim 6, wherein the search unit searches an installation location that matches the search condition received by the search condition reception unit from each of the installation locations stored in the storage unit. 9. 9. The storage unit of the session establishment device stores a conference name of a conference using a terminal device as the related information, and the search unit selects one of the conference names stored in the storage unit. 9. The session establishment system according to claim 6, wherein a search is made for a meeting name that matches the search condition received by the search condition receiving means. 10. The storage means of the session establishment device stores, as the related information, a name of a person who participates in a conference using a terminal device, and the search means selects one of the names stored in the storage means. 10. Search for a person name that matches the search condition received by the search condition receiving means.
The session establishment system according to any one of the preceding claims.