JP5743708B2 - Communication system, server, and communication method - Google Patents

Description

  The present invention relates to a communication system, a server, and a communication method for performing communication, and more particularly to a communication system, a server, and a communication method for performing videophone communication.

  2. Description of the Related Art In recent years, in a communication system that performs videophone communication, a technique for using video data for a ringback tone to a terminal on a transmission side has been considered (see, for example, Patent Documents 1 and 2).

  In order to perform videophone communication in the 3GPP (3rd Generation Partnership Project) standard, the H.264 standard specified in ITU-T at the start of videophone communication. It is necessary to exchange capability information regarding video, audio coding, etc. between terminals according to the H.245 protocol. As described above, when video data is used for the ringback tone transmitted to the calling terminal at the time of transmission, the calling terminal uses the video encoding to be used with the video server that transmits the ringback tone of the video data. H. 245 Capability information exchange is performed.

  In addition, a technique for performing videophone communication after a callee terminal responds via a server that provides a video ringback tone has been considered (for example, see Patent Document 3).

JP 09-247276 A JP 2005-033442 A Special table 2010-518791

  In the techniques as described in Patent Documents 1 and 2, when the destination terminal responds after transmitting the video ringback tone, the H.264 and the destination terminals respond to H.264. It is necessary to exchange 245 capability information. However, H.C. H.245 does not prescribe a procedure for exchanging capability information multiple times within the same communication. For this reason, there is a problem that after the video ringback tone is transmitted, the calling terminal cannot switch the connection destination and perform videophone communication with the called terminal.

  In the technique described in Patent Document 3, in order to perform videophone communication between the calling terminal and the called terminal, it is necessary to pass through a server that provides a video ring back tone. There is a problem.

  The objective of this invention is providing the communication system, the server, and the communication method which solve the subject mentioned above.

The communication system of the present invention includes:
From the originating side gateway that performs connection processing to the communication line of the originating terminal that is the origin of transmission, from the destination side gateway that performs processing to connect to the communication line of the terminating side terminal that receives the origination, A communication system having a server that transmits a video ring back tone to the calling terminal until the called terminal responds when a call is made to the called terminal;
When the call is made, the server sends calling side capability information data indicating the capability of the calling side terminal and called side capability information data indicating the capability of the called side terminal registered in advance. When exchanged with the terminal and the called terminal responds, the exchanged calling side capability information data and the called side capability information data are exchanged with the called terminal,
After the exchange between the destination terminal and the server is completed, the destination gateway instructs the calling gateway to switch the connection destination of the calling terminal from the server to the destination terminal. ,
The calling gateway switches the connection destination of the calling terminal from the server to the called terminal when the switching instruction is given,
After the switching, the calling terminal performs videophone communication with the called terminal based on the calling side capability information data and the called side capability information data.

The server of the present invention
A server that transmits a video ringback tone to a calling side terminal until a response is received from the calling side terminal when a call is made from the calling side terminal that is the source of the call to the called side terminal. Because
When the call is made, the calling side capability information data indicating the capability of the calling side terminal and the called side capability information data indicating the capability of the called side terminal registered in advance are exchanged with the calling side terminal. When the called terminal responds, the exchanged calling side capability information data and the called side capability information data are exchanged with the called terminal.

Further, the communication method of the present invention includes:
From the originating side gateway that performs connection processing to the communication line of the originating terminal that is the origin of transmission, from the destination side gateway that performs processing to connect to the communication line of the terminating side terminal that receives the origination, A communication method in a communication system having a server that transmits a video ringback tone to the calling terminal until the called terminal responds when the call to the called terminal is made,
When the server makes the call, the server sends calling side capability information data indicating the capability of the calling side terminal and called side capability information data indicating the capability of the called side terminal registered in advance. Processing to exchange with the device,
A process of exchanging the exchanged calling side capability information data and the called side capability information data with the called side terminal when the called side terminal responds;
After the exchange between the callee terminal and the server is completed, the callee gateway instructs the callee gateway to switch the connection destination of the callee terminal from the server to the callee terminal. Processing,
When the calling gateway is instructed to switch, a process of switching the connection destination of the calling terminal from the server to the called terminal;
After the switching, the calling terminal performs a videophone communication with the called terminal based on the calling capability information data and the called capability information data.

  As described above, in the present invention, after a video ringback tone is transmitted, videophone communication can be performed without directly exchanging capability information between the calling terminal and the called terminal. it can.

It is a figure which shows one Embodiment of the communication system of this invention. It is a figure which shows an example of an internal structure of the calling side CS-MGW shown in FIG. It is a figure which shows an example of an internal structure of the callee CS-MGW shown in FIG. It is a figure which shows an example of the internal structure of the video server shown in FIG. It is a figure which shows an example of the arrival side capability information data registered into the database shown in FIG. It is a sequence diagram for demonstrating the communication method in the communication system shown in FIG.

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

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

  As shown in FIG. 1, the present embodiment includes a calling terminal 100, a calling CS-MGW 200, a called terminal 300, a called CS-MGW 400, a video server 500, a database 600, and a communication line 700. It is configured.

  The calling terminal 100 is a telephone terminal on the caller side (source of transmission) when performing videophone communication, and has a video display function, a video shooting function, and a videophone communication function. Further, when the calling terminal 100 performs videophone communication with the called terminal 300, the calling side capability information data indicating the capability of the calling terminal 100 and the called side capability information data indicating the capability of the called terminal 300 are used. Videophone communication based on the above. This capability information data is H.264. This is information indicating the capability related to video and audio encoding exchanged between communication terminals that can transmit and receive video data using the communication protocol of H.245. For example, the encoding method for images, the resolution that can be displayed, etc. It is shown.

  Here, “exchange” does not mean “exchange of things”, but means “exchange of information”. That is, in this exchange, it does not mean that the information that it has is handed over to the other party, but it means that it is presented to the other party while retaining the information that it has. For example, it is necessary to negotiate to communicate between the two devices using the information, and it is only necessary that the devices can recognize the information, and the information may be transmitted and received with each other. Good (same for the following description).

  The originating CS-MGW 200 (originating gateway) is a CS-MGW (Circuit Switched-Media Gateway) defined in the 3GPP standard TS23.002, and is an originating terminal in a communication line 700 that is a telephone network using the Internet protocol. 100 is a device having a function of performing connection processing to 100 communication lines 700.

  The called terminal 300 is a telephone terminal on the called party side when performing videophone communication, and has a video display function, a video shooting function, and a videophone communication function.

  The destination CS-MGW 400 (destination gateway) is a CS-MGW defined by 3GPP standard TS23.002, and is connected to the communication line 700 of the destination terminal 300 in the communication line 700 which is a telephone network using the Internet protocol. It is a device having a function for performing connection processing.

  The video server 500 exchanges the calling side capability information data of the calling side terminal 100 and the called side capability information data of the called side terminal 300, the video data transmission function, and the capability between the calling side terminal 100 and the called side terminal 300. A server comprising a memory for storing information data. The video data transmission function transmits a video ringback tone to the calling terminal 100 until the receiving terminal 300 responds when a call is made from the calling terminal 100 to the called terminal 300. It is a function.

  The database 600 stores the callee side capability information data of the callee terminal 300 in advance. In addition, the callee ability information data stored in the database 600 can be acquired from the video server 500.

  FIG. 2 is a diagram illustrating an example of an internal configuration of the originating CS-MGW 200 illustrated in FIG.

  As shown in FIG. 2, the originating CS-MGW 200 shown in FIG. 1 includes a terminal interface unit 210, a line interface unit 220, and a control unit 230.

  The terminal interface unit 210 has an interface function with the calling terminal 100.

  The line interface unit 220 has an interface function with the communication line 700.

  The control part 230 performs the process which the origin CS-MGW200 mentioned later performs, and controls the origin CS-MGW200 whole. For example, the control unit 230 controls the connection of the calling terminal 100 to the communication line 700.

  FIG. 3 is a diagram illustrating an example of an internal configuration of the destination CS-MGW 400 illustrated in FIG. 1.

  As shown in FIG. 3, the destination CS-MGW 400 shown in FIG. 1 is provided with a terminal interface unit 410, a line interface unit 420, and a control unit 430.

  The terminal interface unit 410 has an interface function with the called terminal 300.

  The line interface unit 420 has an interface function with the communication line 700.

  The control unit 430 executes processing performed by a destination CS-MGW 400, which will be described later, and controls the entire destination CS-MGW 400. For example, the control unit 430 controls the connection of the called terminal 300 to the communication line 700.

  FIG. 4 is a diagram showing an example of the internal configuration of the video server 500 shown in FIG.

  As shown in FIG. 4, the video server 500 shown in FIG. 1 includes a database interface unit 510, a line interface unit 520, a control unit 530, and a memory 540.

  The database interface unit 510 has an interface function with the database 600, and acquires (reads out) the callee ability information data registered (saved) in the database 600. In addition, the database interface unit 510 outputs the callee side capability information data acquired from the database 600 to the control unit 530.

  The line interface unit 520 has an interface function with the communication line 700.

  The control unit 530 executes processing performed by the video server 500 described later, and controls the entire video server 500. For example, the control unit 530 exchanges the calling side capability information data with the calling side terminal 100 via the line interface unit 520 using the called side capability information data output from the database interface unit 510. Further, when a call is made from the calling terminal 100 to the called terminal 300, the control unit 530 transmits a video ring to the calling terminal 100 via the line interface unit 520 until the called terminal 300 responds. Send backtone. At this time, the video data used for the video ring back tone may be stored in the memory 540 or may be acquired from an external site or the like. In addition, the control unit 530 writes the calling side capability information data acquired by the above-described exchange of capability information data in the memory 540.

  The memory 540 stores (saves) the calling side capability information data written by the control unit 530. The memory 540 may store video data used for the video ring back tone.

  FIG. 5 is a diagram showing an example of callee ability information data registered in the database 600 shown in FIG.

  In the database 600 shown in FIG. 1, as shown in FIG. 5, the telephone number of the called terminal and the called party capability information data of the receiving terminal are registered (stored) in association with each other. These are pre-registered. Note that the telephone numbers shown in FIG. 5 are numbers for convenience of explanation, and are not related to actual ones.

  Hereinafter, a communication method in the communication system shown in FIG. 1 will be described.

  FIG. 6 is a sequence diagram for explaining a communication method in the communication system shown in FIG. Here, the capability information data will be described as “H.245 capability information data”.

  First, the H.264 of the destination terminal 300 is changed. The 245 capability information data and the telephone number of the called terminal 300 are registered in the database 600 (step S1).

  When a call is made from the calling terminal 100 to the called terminal 300, a connection request to which the telephone number of the called terminal 300 is added is transmitted from the calling terminal 100 to the calling CS-MGW 200 (step S2).

  When the originating CS-MGW 200 receives a connection request to the terminating terminal 300 transmitted from the originating terminal 100, the originating CS-MGW 200 connects to the terminating CS-MGW 400 via the communication line 700. A request is transmitted (step S3).

  When the destination CS-MGW 400 receives the connection request to the destination terminal 300 transmitted from the source CS-MGW 200, the connection request is transmitted from the destination CS-MGW 400 to the destination terminal 300 ( Step S4). In addition, a connection request is transmitted from destination CS-MGW 400 to video server 500 (step S5). This connection request to the video server 500 is a request for transmitting a video ringback tone to the calling terminal 100 to the video server 500.

  When the video server 500 receives the connection request transmitted from the callee CS-MGW 400, the video server 500 reads the callee terminal 300 from the database 600 based on the telephone number of the callee terminal 300 included in the received connection request. H. 245 capability information data is acquired (step S6). At this time, the H.264 registered in association with the telephone number of the called terminal 300 included in the received connection request. 245 capability information data is acquired from the database 600 by the video server 500.

  Then, between the video server 500 and the originating terminal 100, H.264 is transmitted. Exchange of 245 capability information data is performed (step S7). Here, the H.264 of the destination terminal 300 acquired from the database 600 is displayed. 245 capability information data and the H.264 of the originating terminal 100. 245 capability information data is exchanged between the video server 500 and the originating terminal 100.

  In addition, the H.264 of the calling terminal 100 received (acquired) from the calling terminal 100 by this exchange. The 245 capability information data is stored in the memory 540 by the control unit 530 of the video server 500 (step S8).

  Between the video server 500 and the originating terminal 100; When the exchange of the 245 capability information data is completed, a video ringback tone is transmitted from the video server 500 to the calling terminal 100 (step S9).

  Thereafter, when the called terminal 300 responds to the call from the calling terminal 100, a response is transmitted from the called terminal 300 to the called CS-MGW 400 (step S10).

  When the response transmitted from the destination terminal 300 is received by the destination CS-MGW 400, an instruction is transmitted from the destination CS-MGW 400 to the video server 500 to connect to the destination terminal 300. (Step S11).

  The video server 500 that has received the connection instruction from the destination CS-MGW 400 receives the H.264 of the calling terminal 100 stored in the memory 540. The 245 capability information data is read by the control unit 530 (step S12). Then, the read H.264 of the calling terminal 100 is read. Using the H.245 capability information data, H.264 between the video server 500 and the destination terminal 300 is used. 245 capability information data is exchanged (step S13). Here, the H.264 of the calling terminal 100 read from the memory 540 is read. 245 capability information data and the H.264 of the destination terminal 300. 245 capability information data is exchanged between the video server 500 and the called terminal 300.

  Between the video server 500 and the destination terminal 300; When the exchange of the H.245 capability information data is completed, the video server 500 transfers to the destination CS-MGW 400. An exchange completion notification indicating completion of exchange of the 245 capability information data is transmitted (step S14).

  When the exchange completion notification transmitted from the video server 500 is received by the destination CS-MGW 400, an instruction to stop transmission of the video ring back tone is transmitted from the destination CS-MGW 400 to the video server 500 (step S15). ).

  Then, the video server 500 stops transmission of the video ringback tone to the calling terminal 100 (step S16).

  Further, a connection switching instruction for switching the connection destination of the calling terminal 100 from the video server 500 to the called terminal 300 is transmitted from the receiving CS-MGW 400 to the calling CS-MGW 200 (step S17).

  Then, when the connection switching instruction transmitted from the destination CS-MGW 400 is received by the source CS-MGW 200, the connection destination of the source terminal 100 is changed from the video server 500 to the destination terminal 300 by the source CS-MGW 200. Can be switched to. Then, videophone communication is performed (implemented) between the calling terminal 100 and the called terminal 300 (step S18). H. used at this time. The H.245 capability information data is the H.264 exchanged in the above process. 245 capability information data.

  Further, as the originating CS-MGW 200 and the terminating CS-MGW 400, an exchange used in a circuit switching network may be used. In this case, when videophone communication is performed between the calling terminal 100 and the called terminal 300, In order to exchange 245 capability information, the present invention can provide a video ringback tone.

  As described above, the present invention has the following effects.

  The first effect is that between the calling terminal 100 and the video server 500, the H.264 Since the 245 capability information data is exchanged, the video ringback tone can be transmitted from the video server 500 to the calling terminal 100.

  The second effect is that the video server 500 stores the H.264 of the destination terminal 300 from the database 600. 245 capability information data is acquired and the calling terminal 100 and the H.264 capability information data are acquired. Since the H.245 capability information exchange is being performed, the called terminal 300 is directly connected to the calling terminal 100 by the H.264 standard. That is, it is possible to perform videophone communication with the originating terminal 100 without exchanging H.245 capability information.

  The third effect is that the video server 500 is connected to the H.264 of the calling terminal 100. 245 capability information data is stored in the memory 540, and the H.264 stored in the memory 540 is stored. H.245 capability information data and the receiving terminal 300 and H.264. Since the H.245 capability information is exchanged, the calling terminal 100 and the called terminal 300 directly That is, videophone communication with the called terminal 300 can be performed without exchanging 245 capability information.

100 calling terminal 200 calling CS-MGW
210, 410 Terminal interface unit 220, 420, 520 Line interface unit 230, 430, 530 Control unit 300 Termination side terminal 400 Termination side CS-MGW
500 Video server 510 Database interface unit 540 Memory 600 Database 700 Communication line

Claims (7)

From the originating side gateway that performs connection processing to the communication line of the originating terminal that is the origin of transmission, from the destination side gateway that performs processing to connect to the communication line of the terminating side terminal that receives the origination, In a communication system having a server that transmits a video ringback tone to the calling terminal until the called terminal responds when the call to the called terminal is made,
When the call is made, the server sends calling side capability information data indicating the capability of the calling side terminal and called side capability information data indicating the capability of the called side terminal registered in advance. When exchanged with the terminal and the called terminal responds, the exchanged calling side capability information data and the called side capability information data of the called terminal are exchanged with the called terminal. And
After the exchange between the destination terminal and the server is completed, the destination gateway instructs the calling gateway to switch the connection destination of the calling terminal from the server to the destination terminal. ,
The calling gateway switches the connection destination of the calling terminal from the server to the called terminal when the switching instruction is given,
The communication system, wherein after the switching, the calling terminal performs videophone communication with the called terminal based on the calling party capability information data and the called party capability information data. The communication system according to claim 1,
A database in which the callee ability information data is registered in advance;
The server acquires the called side capability information data from the database when the call is made, and uses the acquired called side capability information data to transmit the calling side capability information to the calling side terminal. A communication system characterized by exchanging data. The communication system according to claim 1 or 2,
The server notifies the completion to the destination gateway after the exchange of the destination side capability information data with the destination terminal is completed,
The receiving side gateway, after receiving the notification of the completion, instructs the calling side gateway to switch the connection destination of the calling side terminal from the server to the called side terminal. The communication system according to claim 1 or 2,
The destination gateway instructs the server to stop transmitting the video ringback tone after the exchange of the destination side capability information data between the destination terminal and the server is completed.
The server stops the transmission of the video ring back tone when the transmission stop is instructed. The communication system according to any one of claims 1 to 4,
A communication protocol for exchanging the called side capability information data and the calling side capability information data is H.264. A communication system characterized by being H.245. A server that transmits a video ringback tone to a calling side terminal until a response is received from the calling side terminal when a call is made from the calling side terminal that is the source of the call to the called side terminal. Because
When the call is made, the calling side capability information data indicating the capability of the calling side terminal and the called side capability information data indicating the capability of the called side terminal registered in advance are exchanged with the calling side terminal. The server exchanges the exchanged calling side capability information data and the called side capability information data of the called side terminal with the called side terminal when the called side terminal responds. From the originating side gateway that performs connection processing to the communication line of the originating terminal that is the origin of transmission, from the destination side gateway that performs processing to connect to the communication line of the terminating side terminal that receives the origination, A communication method in a communication system having a server that transmits a video ringback tone to the calling terminal until the called terminal responds when the call to the called terminal is made,
When the server makes the call, the server sends calling side capability information data indicating the capability of the calling side terminal and called side capability information data indicating the capability of the called side terminal registered in advance. Processing to exchange with the device,
A process of exchanging the exchanged originating side capability information data and the terminating side capability information data of the terminating side terminal with the terminating side terminal when the server responds to the terminating side;
After the exchange between the callee terminal and the server is completed, the callee gateway instructs the callee gateway to switch the connection destination of the callee terminal from the server to the callee terminal. Processing,
When the calling gateway is instructed to switch, a process of switching the connection destination of the calling terminal from the server to the called terminal;
A communication method in which, after the switching, the calling terminal performs a videophone communication with the called terminal based on the calling side capability information data and the called side capability information data.

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