JP2009232378A - Method, system, apparatus and program for convening conference with key telephone system using sip - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accomplish a conference function that is not provided generally in a SIP sequence, using a general SIP (Session Initiation Protocol) sequence even while a SIP telephone set that does not include a mixing function, is used. <P>SOLUTION: In a system comprising a plurality of terminals and conference convening apparatus interconnected with the plurality of terminals over a network, a two-way communication destination of a first terminal and two-way communication destinations of a plurality of terminals with which the first terminal desires to communicate bidirectionally, are defined as conference convening apparatuses and each conference convening apparatus mixes transmission data from the terminals. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a button telephone apparatus using a Session Initiation Protocol (SIP).

  There is SIP as a call control protocol used in Internet telephones that apply VoIP (Voice over Internet Protocol). SIP has been developed as a general-purpose session control protocol, and operations such as start, change, and end of a session such as an IP phone can be performed by conforming to SIP. Conventionally, in two-way communication such as an IP phone, H.264 is used. The H.323 protocol and vendor-specific protocols were used, but in recent years, the number of cases employing SIP has increased.

Furthermore, SIP is widely used as a standard protocol in NGN (Next Generation Network), which is a next generation network infrastructure (see, for example, Patent Document 1).
JP 2007-318621 A

  In the case where the main device (SIP proxy server) compliant with SIP and the telephone (SIP telephone) having the SIP function as its extension terminal make a call with each other, including the technique described in Patent Document 1, the SDP (Session Description Protocol) ) And peer-to-peer exchanges are performed using RTP (Real time Transport Protocol).

  In SIP, a basic sequence such as outgoing call / incoming call / holding / transfer is defined. However, in SIP, there is no predetermined sequence for calling a conference call provided by the existing button telephone service. Therefore, it has been difficult to realize a conference call of three or more parties with a SIP extension telephone.

  Accordingly, the present invention provides a button telephone apparatus using SIP that can realize a conference function that is not generally provided in the SIP sequence by using a general SIP sequence even when a SIP telephone having no mixing function is used. The purpose of the present invention is to provide a meeting convocation method, an apparatus thereof, and a program thereof.

  According to a first aspect of the present invention, there is provided a conference invitation device in a system including a plurality of terminals as devices and a conference invitation device connected to the plurality of terminals through a network, the first terminal The bi-directional communication destination and the bi-directional communication destinations of a plurality of terminals that the first terminal desires bi-directional communication are used as a conference invitation device, and the conference invitation device mixes transmission data from each terminal. A meeting invitation device is provided.

  According to a second aspect of the present invention, there is provided a conference convocation system comprising a plurality of terminals as a system and a proxy server connected to the plurality of terminals by a network, wherein the proxy server is the first proxy server. A conference invitation system is provided, which is a conference invitation device provided from the above viewpoint.

  According to a third aspect of the present invention, there is provided a conference invitation method in a system comprising a plurality of terminals and a conference invitation device interconnected with the plurality of terminals by a network as a method. The bi-directional communication destination and the bi-directional communication destinations of a plurality of terminals that the first terminal desires bi-directional communication are used as a conference invitation device, and the conference invitation device mixes transmission data from each terminal. A meeting convocation method is provided.

  According to a fourth aspect of the present invention, there is provided a conference for causing a computer to function as a conference invitation device in a system comprising a plurality of terminals as a program and a conference invitation device connected to the plurality of terminals by a network. A convocation program, wherein a bi-directional communication destination of a first terminal and bi-directional communication destinations of a plurality of terminals that the first terminal desires bi-directional communication are used as a conference convocation device, and the conference convocation device is received from each terminal A conference invitation program for causing a computer to function as a conference invitation device is provided.

  According to the present invention, since a RTP is aggregated in a button telephone apparatus having a SIP function using a general SIP sequence, a conference function can be realized even if a SIP telephone having no mixing function is used. Is possible.

  Next, embodiments of the present invention will be described with reference to the drawings.

[Configuration of the embodiment]
FIG. 1 shows the configuration of an embodiment of the present invention. The embodiment of the present invention includes a main device 20 that is a proxy server for a button telephone device using SIP, and a plurality of SIP telephones connected to each other by a LAN line using the main device 20 as a main device. The main device 20 can also be called a key telephone device because it can be a SIP UA (user agent).

  In FIG. 2, SIP telephones 1 to 3 are shown as an example, but the number of SIP telephones is an example and is not limited to three.

  Next, FIG. 2 shows a configuration of the main apparatus 20 in the embodiment of the present invention. As shown in FIG. 2, the main apparatus 20 includes a LAN accommodating interface 101, a SIP processing unit 102 that analyzes SIP, and a call control unit 103 that controls calls. As a result, the main apparatus 20 executes the SIP proxy server function as a back-to-back user agent (B2BUA) that relays the SIP request.

  The main apparatus 20 includes an RTP processing unit 105 and an audio data processing unit 104 connected to the LAN accommodating interface 101. The voice data processing unit 104 has means for converting into a voice signal handled by a normal key telephone. The RTP processing unit 105 includes means for generating an RTP packet and transmitting / receiving it to / from the SIP telephone.

[Description of Operation of Embodiment]
The operation of this embodiment will be described with reference to the sequence diagrams of FIGS. First, a case where the SIP telephone 1 and the SIP telephone 2 make a call will be described. In this case, the SIP message is exchanged via the main device 20 which is a SIP server. (See Figure 3)
First, the SIP telephone 1 makes a call to the SIP telephone 2 (INVITE transmission). The main apparatus 20 that has received the INVITE addressed to the SIP telephone 2 transmits the received INVITE to the SIP telephone 2. The main device 20 returns a 100 Trying response to the SIP telephone 1 as a provisional response to the request.

  The SIP telephone set 2 that has received INVITE returns a 100 Trying response to the main apparatus 20 as a provisional response to the request. Then, the SIP telephone 2 transmits a 200 OK response to the main apparatus 20 as an affirmative response to the request. The main device 20 transfers this 200 OK response to the SIP telephone 1.

  The SIP telephone set 1 that has received the 200 OK response transmits ACK to the main apparatus 20 as confirmation of session establishment. The main device 20 transfers this ACK to the SIP telephone 2.

  As a result, the SDPs of the respective SIP telephones are exchanged, and the voice RTP is directly exchanged between the SIP telephones without going through the main apparatus 20.

Next, an operation of the embodiment for calling another SIP telephone 3 from the SIP telephone 1 to make a conference call of three parties while the SIP telephone 1 and the SIP telephone 2 are making a call will be described. . (See FIG. 4, FIG. 5 and FIG. 6)
In FIG. 4, in order to convene the SIP telephone 3 to the conference, the SIP telephone 1 puts the SIP telephone 2 on hold using a general SIP sequence. As a result, bidirectional communication by RTP between the SIP telephones 1 and 2 is stopped (step S1). Specifically, the SIP phone 1 issues a hold instruction (INVITE transmission) to the SIP phone 2. The main apparatus 20 that has received the INVITE addressed to the SIP telephone 2 transmits the received INVITE to the SIP telephone 2. The main device 20 returns a 100 Trying response to the SIP telephone 1 as a provisional response to the request.

  The SIP telephone set 2 that has received INVITE returns a 100 Trying response to the main apparatus 20 as a provisional response to the request. The main device 20 transmits a 200 OK response to the SIP telephone 1.

  The SIP telephone set 1 that has received the 200 OK response transmits ACK to the main apparatus 20 as confirmation of RTP stoppage. The main device 20 transfers this ACK to the SIP telephone 2.

  In this state, the SIP telephone set 1 makes a second call (INVITE transmission) to the SIP telephone set 3 including a “conference special number” which is a special number indicating a command for starting a conference, like a general button telephone. (Step S2).

  In the main device 20 that has received INVITE addressed to the SIP telephone 3 with the conference special number, the conference special number is transmitted from the SIP processing unit 102 to the call control unit 103 by this conference special number, which becomes a trigger for this operation. The sequence is operated (step S3).

  The call control unit 103 removes the conference special number and performs an INVITE transmission from the SIP processing unit 102 to the SIP telephone 3. The voice call between the terminals is started by the SIP message of the SIP telephone 3 and the SIP telephone 1, and at this time, the RTP exchange is peer-to-peer between the SIP telephones (step S4). Operations other than the addition and removal of the conference special number are the same as the operations described above with reference to FIG.

  Next, the description of the operation will be continued with reference to FIG. Here, in a general SIP telephone, the hooking operation in a state where two call calls are held has a function of holding the current call call and putting the held call back into a call state. Cannot be in a call state at a time, but either call is put in a call state.

  The SIP telephone set 1 holds the SIP telephone set 2 and performs a hooking operation in a talking state with the SIP telephone set 3 (step S5). Note that the operation at this time is the same as that in step S1, and thus the description thereof is omitted. As a result, first, the SIP telephone 3 that is in a call is put on hold, and bidirectional communication by RTP is interrupted.

  Thereafter, an INVITE message for canceling the hold is sent from the SIP telephone set 1 to the SIP telephone set 2 (step S6).

  Here, the main device 20 does not transmit this hold release INVITE message to the SIP telephone 2, but instead returns a 200 OK response which is an affirmative response to this INVITE message. At this time, the SDP included in the 200 OK is added with contents including the IP address and codec (which corresponds to “location information” in the present invention), which is the RTP receivable capability of the main device 20 (step S7).

  Thereby, the SIP telephone 1 performs bidirectional communication with the main apparatus 20 by RTP (step S9). At this time, the main apparatus 20 transmits a tone by RTP. By listening to this, it is possible to confirm that the SIP telephone 1 is inviting the conference (step S8).

  Next, the description of the operation will be continued with reference to FIG. In the above-described state, the SIP telephone 1 performs a hooking operation once again (step S10).

  The SIP telephone device 1 holds the call with the main device 20 that appears to be a call with the SIP telephone 2 by the operation at Step S7 described above, and tries to release the call with the SIP telephone 3 that is on hold. Therefore, INVITE is transmitted to the main apparatus 20 which is a SIP server.

  When the main apparatus 20 receives this INVITE, the main apparatus 20 does not transfer this message to the SIP telephone 3 but adds a SDP indicating the RTP reception capability of the main apparatus 20 and transmits a 200 OK response.

  As a result, the SIP telephone 1 starts a call with the main apparatus 20 again.

  With the INVITE of the hold release message from the SIP phone 1 as a trigger, the hold SIP phone 2 and the SIP phone 3 transmit the hold release INIVTE (steps S11 and S12). At this time, the SDP assigned to INVITE describes the RTP receivable capability of the main device 20 and transmits it.

  Further, when the SIP telephone set 1 is in a call state, the main apparatus 20 transmits a BYE request to the SIP telephone set 1 in order to end the call with respect to the held call. As a result, the SIP telephone 1 has only one call (step S13). As a result, the two-way communication destinations of the SIP telephones 1, 2, and 3 are addressed to the main apparatus 20 (step S14).

  The main device 20 converts the received RTP and performs voice mixing. As a result, it is possible to make a conference call between the SIP telephones 1 to 3.

[Effect of the embodiment of the present invention]
The first effect is a telephone having a SIP function, and even if a SIP telephone that cannot be mixed is used, it is generally provided in the SIP sequence by aggregating RTP in the main unit using a general SIP sequence. There is no meeting function.

  The second effect is that a conference call including not only the SIP telephone but also the main device is possible. The reason is that the main device itself can be a SIP server and a SIP UA (user agent), so that the role is determined flexibly according to the use and the RTP is received.

[Other Embodiments of the Present Invention]
A new SIP telephone 4 can be called by sending a DTMF to the main apparatus 20 in the tone listening state after step 3 in FIG. In this case, the sequence is in the initial state of step 3. As a result, it is possible to call three or more conference calls at a time.

  The main device 20 and each SIP telephone that are embodiments of the present invention can be realized by hardware, software, or a combination thereof.

It is a figure showing the basic composition of the embodiment of the present invention. 2 is a diagram illustrating a basic internal configuration of a main device 20. FIG. It is a sequence diagram showing operation | movement of embodiment of this invention. It is a sequence diagram showing operation | movement of embodiment of this invention. It is a sequence diagram showing operation | movement of embodiment of this invention. It is a sequence diagram showing operation | movement of embodiment of this invention.

Explanation of symbols

1, 2, 3 SIP telephone 20 Main apparatus 101 LAN accommodating interface 102 SIP processing unit 103 Call control unit 104 Voice data processing unit 105 RTP processing unit

Claims (17)

A meeting invitation device in a system comprising a plurality of terminals and a meeting invitation device connected to each other by a plurality of terminals and a network,
The conference call conferencing apparatus includes a bi-directional communication destination of the first terminal and a bi-directional communication destination of a plurality of terminals that the first terminal desires bi-directional communication, and mixes transmission data from each terminal. A meeting convocation device. The meeting convocation apparatus according to claim 1,
A first connection unit that receives a connection request from the first terminal and establishes a connection between the first terminal and the second terminal via a meeting invitation device;
In response to the connection request with the conference special number added from the first terminal, a connection is established after establishing a connection with the Nth (N is a natural number of 3 or more) terminal via the conference invitation device. Connection means;
When a signal for canceling the hold state with the second terminal is sent from the first terminal with the reception of the conference special number as a trigger, the meeting calling device is assumed to be a connection destination with the second terminal. A third connection means for establishing a connection between the meeting invitation device and the first terminal by returning the position information of
When a signal for canceling the hold state with the Nth terminal is sent from the first terminal triggered by the reception of the conference special number, it is determined that the meeting is called a connection destination with the Nth terminal. A fourth connection means for establishing a connection between the meeting invitation device and the first terminal by returning the position information of
Triggering the reception of the conference special number as a trigger, the conference invitation device returns the location information of the conference invitation device as the connection destination with the first terminal to the second terminal and the Nth terminal, Fifth connection means for establishing a connection with the second terminal and the Nth terminal;
A hold release signal transmission means for sending a hold release signal to the first terminal after the operation of the fifth connection means;
A meeting convocation apparatus characterized by comprising:   3. The meeting invitation apparatus according to claim 2, wherein a plurality of the Nth terminals are provided. A meeting convocation device according to claim 2 or 3,
When the third connection means establishes a connection between the first terminal and the conference invitation apparatus, the apparatus further comprises tone signal transmission means for transmitting a tone signal from the conference invitation apparatus to the first terminal. A meeting convocation device characterized by   The conference invitation device according to any one of claims 1 to 4, wherein a communication method between the conference invitation device and each terminal is a communication method compliant with a session start protocol. A conference invitation system comprising a plurality of terminals and a proxy server connected to each other by a network with the plurality of terminals,
The conference invitation system, wherein the proxy server is the conference invitation device according to any one of claims 1 to 5. A meeting invitation method in a system comprising a plurality of terminals and a meeting invitation device connected to each other by a network with the plurality of terminals,
The bi-directional communication destination of the first terminal and the bi-directional communication destinations of a plurality of terminals for which the first terminal desires bi-directional communication are used as a conference invitation device, and the conference invitation device mixes transmission data from each terminal. A meeting convocation method characterized by: A meeting convocation method according to claim 7,
The first connection that is put on hold after the meeting invitation device establishes a connection between the first terminal and the second terminal via the meeting invitation device in response to a connection request from the first terminal Steps,
The conferencing apparatus receives a connection request to which a conference special number is added from the first terminal and establishes a connection with the Nth (N is a natural number of 3 or more) terminal via the conferencing apparatus, and then is put on hold. A second connection step,
When the conference invitation device receives a signal for releasing the hold state with the second terminal from the first terminal, triggered by the reception of the conference special number, the connection destination with the second terminal A third connection step of establishing a connection between the meeting invitation device and the first terminal by returning the location information of the meeting invitation device as being;
When the conferencing device receives a signal for canceling the hold state with the Nth terminal from the first terminal triggered by the reception of the conference special number, the connection destination with the Nth terminal A fourth connection step of establishing a connection between the meeting invitation device and the first terminal by returning the location information of the meeting invitation device as being;
By returning the conference invitation device to the second terminal and the Nth terminal as the connection destination with the first terminal, with the reception of the conference special number as a trigger, A fifth connection step for establishing a connection between the meeting invitation device and the second terminal and the Nth terminal;
A conferencing call sending device for sending a hold release signal to the first terminal after the operation of the fifth connection step;
A meeting convocation method characterized by comprising:   9. The conference convocation method according to claim 8, wherein there are a plurality of Nth terminals, and each step is performed for each of the plurality of Nth terminals. The meeting convocation method according to claim 8 or 9,
A tone signal transmission step for transmitting a tone signal from the conference invitation device to the first terminal when the conference invitation device establishes a connection between the first terminal and the conference invitation device in the third connection step. A meeting convocation method, further comprising:   11. The conference invitation method according to claim 7, wherein a communication method between the conference invitation device and each terminal is a communication method compliant with a session start protocol. A meeting convocation method in a system comprising a plurality of terminals, and a proxy server connected to the plurality of terminals by a network,
The conference call method according to claim 7, wherein the proxy server performs the conference call method according to claim 7 as a conference call device. A conference invitation program for causing a computer to function as a conference invitation device in a system including a plurality of terminals and a conference invitation device connected to each other by a plurality of terminals and a network,
The conference call conferencing apparatus includes a bi-directional communication destination of the first terminal and a bi-directional communication destination of a plurality of terminals that the first terminal desires bi-directional communication, and mixes transmission data from each terminal. A conference invitation program for causing a computer to function as the conference invitation device. 14. The conference invitation program according to claim 13, wherein the conference invitation device includes:
A first connection unit that receives a connection request from the first terminal and establishes a connection between the first terminal and the second terminal via a meeting invitation device;
In response to the connection request with the conference special number added from the first terminal, a connection is established after establishing a connection with the Nth (N is a natural number of 3 or more) terminal via the conference invitation device. Connection means;
When a signal for canceling the hold state with the second terminal is sent from the first terminal with the reception of the conference special number as a trigger, the meeting calling device is assumed to be a connection destination with the second terminal. A third connection means for establishing a connection between the meeting invitation device and the first terminal by returning the position information of
When a signal for canceling the hold state with the Nth terminal is sent from the first terminal triggered by the reception of the conference special number, it is determined that the meeting is called a connection destination with the Nth terminal. A fourth connection means for establishing a connection between the meeting invitation device and the first terminal by returning the position information of
Triggering the reception of the conference special number as a trigger, the conference invitation device returns the location information of the conference invitation device as the connection destination with the first terminal to the second terminal and the Nth terminal, Fifth connection means for establishing a connection with the second terminal and the Nth terminal;
A hold release signal transmission means for sending a hold release signal to the first terminal after the operation of the fifth connection means;
A meeting invitation program characterized by comprising:   15. The meeting invitation program according to claim 14, wherein there are a plurality of the Nth terminals. The conference invitation program according to claim 14 or 15, wherein the conference invitation device includes:
When the third connection means establishes a connection between the first terminal and the conference invitation apparatus, the apparatus further comprises tone signal transmission means for transmitting a tone signal from the conference invitation apparatus to the first terminal. A program for convocation of conferences.   17. The conference invitation program according to claim 13, wherein a communication method between the conference invitation device and each terminal is a communication method compliant with a session start protocol.

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