KR101524496B1 - System and method for providing voice and video ringback tone services during volte voice call - Google Patents

Abstract

The present invention relates to a system and method for providing a voice and video ring back tone service in a VoLTE voice call, and more particularly, to a system and method for providing a voice and video ring back tone service in a VoLTE voice call comprising an exchange device for performing a VoLTE voice call call processing between a calling terminal and a called terminal; A ringback tone server for storing voice and video ringback tone tone information set for the called terminal; And a ring back tone providing device for storing a voice and video ring back tone sound source corresponding to voice and video ring back tone information set for the called terminal and providing voice and video ring back tone set for the called terminal to the calling terminal, Wherein the switching device forms a media session with the calling terminal to provide a voice and video ringback tone to the calling terminal before the called terminal answers the VoLTE voice call and the ringback tone providing device transmits voice and video through the media session And provides a ring back tone to the calling terminal, and provides a system for providing a voice and video ring back tone service in a VoLTE voice call and a method using the same.

Description

TECHNICAL FIELD [0001] The present invention relates to a system and a method for providing a voice and video ring back tone service in a VoLTE voice call,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a system and method for providing a RBT service, and more particularly, to a system and method for providing a voice and video RBT service to a calling terminal during a VoLTE voice call.

The ring back tone service is a service for providing a sound source or image set by a called party to a calling terminal during a call connection wait. According to the conventional ring back tone service, a caller is provided with a ring back tone (call connection standby sound source) preset by a caller when a caller attempts a voice call based on a circuit communication network. In addition, a method of providing a video as a conventional RBT service is known in which a caller provides a ringback tone image (video for call connection waiting) preset by a caller at the time of a video call attempt to a caller based on a circuit communication network.

However, in the conventional ring back tone service, only the voice ring back tone can be listened to when voice call is attempted because the voice and the video are divided. To view the video, the caller must dial the telephone number + There is a limitation in that a video ring back tone service can be provided only when a video call is performed by pressing a video call button.

Meanwhile, along with the rapid spread of smart phones, LTE service, which is a fourth generation mobile communication service, is rapidly being activated. Therefore, it is desired to provide a ring back tone service suitable for the LTE service in using the LTE service. In particular, VoLTE (Voice over LTE) service, which enables voice calls based on LTE network through LTE data packet network, is also being activated recently. Unlike the third generation communication service, the VoLTE service is expected to be used more because it uses a packet and can provide a clear sound quality. Therefore, it is desired to provide a ringback tone service efficiently when VoLTE service is performed. However, there is no specific method of performing ringback tone service when VoLTE service is performed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a method and apparatus for providing a voice and video ring back tone set by a called terminal together with a calling terminal in case of performing a VoLTE voice call in an LTE (Long Term Evolution) A method and a system.

According to an aspect of the present invention, there is provided a system for providing a voice and video ringback tone service in a VoLTE voice call, the system comprising: an exchange device for performing a VoLTE voice call call processing between a calling terminal and a called terminal; A ringback tone server for storing voice and video ringback tone tone information set for the called terminal; And a ring back tone providing device for storing a voice and video ring back tone sound source corresponding to voice and video ring back tone information set for the called terminal and providing voice and video ring back tone set for the called terminal to the calling terminal, Wherein the switching device forms a media session with the calling terminal to provide a voice and video ringback tone to the calling terminal before the called terminal answers the VoLTE voice call and the ringback tone providing device transmits voice and video through the media session And a ring back tone is provided to the calling terminal. The system provides a voice and video ring back tone service in a VoLTE voice call.

Here, the switching apparatus may receive a first call setup request signal for setting the voice and video channels to be released from the calling terminal, and may transmit a second call setup request signal for setting the voice channel to be opened to the called terminal .

In addition, when the exchange apparatus receives the call setup response signal for the second call setup request signal from the destination terminal, the switching apparatus transmits a third call setup request signal for setting the voice and video channel to be released to the ring back tone providing apparatus can do.

In addition, the ring back tone providing apparatus may inquire the ring back tone tone source information set for the called terminal with the ring back tone server, and receive ring back tone tone source information as a response thereto.

In addition, the switching device may receive a call setup completion signal that is set to open a voice and video channel from the ring back tone providing device, and may transmit a call setup response signal to the calling terminal.

In addition, the ringback tone providing apparatus reproduces a voice and video ringback tone sound source corresponding to the voice and video ringback tone tone information set for the called terminal through a media session formed between the calling terminal and the switching apparatus, To the calling terminal so as to provide the voice and video ring back tone to the calling terminal.

In addition, when the switching apparatus receives a call connection completion signal in response to a VoLTE voice call from the called terminal, the ring back tone providing apparatus transmits a call termination signal to the ring back tone providing apparatus, and the ring back tone providing apparatus transmits the voice and video ring back tone It is preferable to stop the operation.

In addition, the switching device transmits a call connection completion signal for releasing the video channel while maintaining the voice channel to the calling terminal, and a VoLTE voice call including only the voice channel is formed between the calling terminal and the switching device, The terminal may be configured to perform a voice call through the VoLTE voice call.

According to another aspect of the present invention, there is provided a method of providing a voice and video ring back tone service in a VoLTE voice call, the method comprising: receiving a first call setup request signal for a VoLTE voice call from a calling terminal, A first step of transmitting a call setup request signal; A second step in which the switching device transmits a third call setup request signal for transmitting the voice and video ring back tone to the ring back tone providing device; A third step of requesting and receiving RBT tone source information set for the called terminal by the RBT server; A fourth step of the ring back tone providing device transmitting a call setup completion signal to the switching device and forming a call including the switching device and the voice and image channel; And a fifth step of forming a media session including a voice and video channel with the calling terminal and a voice and video ring back tone transmitted from the ring back tone providing apparatus through the formed media session to the calling terminal, And provides a method for providing voice and video ring back tone service during a call.

According to the present invention, it is possible to provide a method and system for providing a voice and video ringback tone set by a called terminal to a calling terminal when a VoLTE voice call is performed in an LTE (Long Term Evolution) network.

In addition, according to the present invention, when a calling terminal attempts a VoLTE voice call, even when a calling terminal number and a voice call button are pressed, not only a voice ring back tone but also a video ring back tone can be simultaneously provided to the calling terminal. That is, even if a voice call is attempted in VoLTE, the caller terminal user can always receive a voice / video ringback tone only by pressing a single button without distinction between voice and image by showing the video ringback tone.

1 is a diagram illustrating a connection state between a system 100 for providing voice and video RBT services and a calling terminal 200 and a called terminal 300 in a VoLTE voice call according to the present invention.
FIG. 2 is a flowchart illustrating a method of providing a voice and video RBT service in a VoLTE voice call according to the present invention with the configuration as shown in FIG.
3 is a diagram illustrating an example of a screen when voice and video ring back tones are provided to the calling terminal 200 by a system and method for providing a voice and video ring back tone service in the VoLTE voice communication described with reference to FIG. 1 and FIG. 2 .

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a connection state between a system 100 for providing voice and video RBT services and a calling terminal 200 and a called terminal 300 in a VoLTE voice call according to the present invention.

Referring to FIG. 1, a system 100 (hereinafter, referred to as a ring back tone service providing system) for providing voice and video ring back tone service in a VoLTE voice call according to the present invention includes a switching apparatus 110, a ring back tone server 120, And a ring back tone providing device 130. The ring back tone service providing system 100 is coupled between the calling terminal 200 and the called terminal 300 and the ring back tone service providing system 100 receives the VoLTE voice call from the calling terminal 200 to the calling terminal 300, And provides a voice and video ring back tone set by the terminal 300. [

The calling terminal 200 and the called terminal 300 are conventionally known mobile communication terminals. However, the present invention provides voice and video ringback tones to the calling terminal 200 when VoLTE (Voice over LTE) And thus it is a mobile communication terminal supporting LTE service.

As is well known, Voice over LTE (VoLTE) provides a voice call service using a LTE (Long Term Evolution) network, which is a fourth generation mobile communication service. Unlike the third generation mobile communication, It is a service that provides a voice call over the LTE network on a packet-by-packet basis. Such a VoLTE service is known from the prior art and is not a direct object of the present invention, so a detailed description thereof will be omitted.

A call exchange control unit (CSCF) 110 plays a role of performing call processing for a VoLTE voice call service between the calling terminal 200 and the called terminal 300. That is, when the calling terminal 200 requests the VoLTE voice call to the calling terminal 300, the switching device 110 forms a call between the calling terminal 200 and the called terminal 300 so that the calling terminal 200 And the receiving terminal 300 can perform a VoLTE voice call. The switching device 110 interlocks with the ring back tone server 120 and the ring back tone providing device 130 to form a media session with the calling terminal 200 and transmits a voice set by the called terminal 300 And provides the video ring back tone to the calling terminal 200. It should be noted that other components for performing a VoLTE voice call in addition to the switching device 110 in FIG. 1 are known in the prior art and are not directly related to the present invention.

The ringback tone server 120 stores voice and video ringback tone tone information set for the called terminal 300. The voice tone and video ringback tone tone information set by the called terminal 300 from the ringback tone providing device 130 And transmits the voice and video RBT sound source information set by the receiving terminal 300 as a response to the RBT tone source information to the RBT providing device 130. [

The ring back tone providing apparatus 130 stores voice and video ring back tone sound sources corresponding to the voice and video ring back tone information set for the called terminal 300 and transmits the voice and video ring back tone sound sources to the calling terminal 200, Voice and video ring back tone. That is, the ring back tone providing device 130 is provided between the calling terminal 200 and the switching device 110 to provide a voice and video ringback tone to the calling terminal before the calling terminal 300 answers the VoLTE voice call And provides the voice and video ring back tone to the calling terminal through the formed media session.

Although not shown in FIG. 1, the RBT service providing system 100 may further include a CS / BS (Customer Server / Billing Server) for managing subscription information and billing information of the RBT subscriber.

Next, a specific operation of the ring back tone service providing system 100 described with reference to FIG. 1 will be described with reference to FIG.

FIG. 2 is a flowchart illustrating a method of providing a voice and video RBT service in a VoLTE voice call according to the present invention with the configuration as shown in FIG.

2, when the calling terminal 200 requests the VoLTE voice call to the called terminal 300, the calling terminal 200 transmits a first call setup request signal INVITE to the switching device 110, (S100). The first call setup request signal is a signal for setting a call between the calling terminal 200 and the switching device 110 to open the voice channel and the video channel together.

Upon receiving the first call setup request signal from the calling terminal 200, the switching device 110 transmits a second call setup request signal INVITE to the called terminal 300 (S110). Here, the second call setup request signal is set to open only the voice channel, and is transmitted to the called terminal 300.

In step S120, the called terminal 300 receives a second call setup request signal and transmits a call setup response signal (1xx provisional response) to the switch 110 indicating that the call is available.

Next, the switching device 110 confirms whether the user of the called terminal 300 is subscribed to the RBT service. If the subscriber terminal 300 is subscribed to the subscriber terminal 300, the switching device 110 transmits the voice and video RBT The ring back tone providing apparatus 130 transmits a call setup response signal (INVITE) indicating that the channel is open together with the third call setup request signal INVITE 1xx Provisional response) to the switching device 110 (S140).

Thereafter, the ring back tone providing device 130 transmits a query signal requesting the ring back tone sound source information set for the receiving terminal 300 to the ring back tone server 120 (S150). At this time, the inquiry signal includes an identifier for identifying the destination terminal 300, such as a telephone number of the destination terminal 300, a URI (Uniform Resource Indicator), and the like.

The ringback tone server 120 searches the ringback tone tone source information set for the destination terminal 300 based on the identifier and transmits the retrieved ringback tone tone source information to the ringback tone providing device 130 as a response signal (S160 ). Here, the sound source information is preferably a coded sound source code.

After receiving the RBT tone source information from the RBT server 120, the RBT providing device 130 transmits a call setup completion signal 200 OK, which is set to open the voice and video channels to the switching device 110 S170). Thus, a call including a voice and video channel is set between the ring back tone providing device 130 and the switching device 110.

Next, the switching device 110 transmits a response signal (ACK) for the call setup completion signal 200 OK to the ring back tone providing device 130 (S180), and the switching device 110 transmits the response signal (ACK) (1xx provisional response) to the calling terminal 200 (S190).

Subsequently, the switching device 110 forms an early media session including the voice and video channels with the calling terminal 200 so as to provide voice and video ring back tone to the calling terminal 200, The voice and video ringback tone transmitted from the ringback tone providing device 130 through the media session is transmitted to the calling terminal 200 (S200). At this time, since the ring back tone providing device 130 has the ring back tone sound source, since the ring back tone sound source information is received from the ring back tone server 120 in step S160, the ring back tone sound source corresponding to the ring back tone sound source information is reproduced To the calling terminal 200 through the early media session. In addition, the ring back tone providing device 130 can transmit the voice and video ring back tone to the switching device 110 because the call with the voice and video channel open is set as described above with the switching device 110. [

Meanwhile, when the calling terminal 300 responds to the call while the voice and video ringback tone is being provided to the calling terminal 200, a call connection completion signal 200 OK is transmitted from the called terminal 300 to the switching device 110 (S210), and the switching device 110 transmits a call setup completion signal (ACK) to the called terminal 300 as a response thereto (S220).

Next, the switching device 110 transmits a call termination signal (BYE) to the ring back tone providing device 130 to terminate the media session in which the voice and video channels set for the voice and video ring back tone transmission are released (S230 , The ring back tone providing device 130 transmits a response signal 200 OK to the switching device 110 (S240), and stops transmission of the voice and video ring back tone.

Subsequently, the switching device 110 transmits a call connection completion signal (200 OK) to the calling terminal 200 (S250). At this time, the switching device 110 maintains the voice channel and the video channel among the voice and video channels established through the media session, in order to transmit the voice and video ring back tone to the calling terminal 200.

The calling terminal 200 transmits a response signal ACK for the call connection completion signal 200 OK to the switching apparatus 110 in step S260 and transmits only the voice channel between the calling terminal 200 and the called terminal 300 A VoLTE voice call is made between the calling terminal 200 and the calling terminal 300 at step S270.

3 is a diagram illustrating an example of a screen when voice and video ring back tones are provided to the calling terminal 200 by a system and method for providing a voice and video ring back tone service in the VoLTE voice communication described with reference to FIG. 1 and FIG. 2 .

3 is a diagram illustrating a ring back tone service providing system when a user of a calling terminal 200 enters a telephone number of a called terminal 300 and a user of the called terminal 300 when a VoLTE voice call is attempted with the called terminal 300, And a voice and video ringback tone are simultaneously output from the calling terminal 200 to the calling terminal 200 through the communication terminal 100 and the voice and video ringback tone is outputted from the calling terminal 200. [

Referring to FIG. 3, the following will be described.

1) The calling terminal 200 user selects the called party by inputting the telephone number of the called terminal 300 directly at the calling terminal 200 or selecting the number of the called terminal 300 from the contact list in the terminal.

2) The calling terminal 200 tries VoLTE voice call to the selected called terminal 300 number. This can be done by a method of pressing the telephone number + call button (voice call button) of the call receiving terminal 200. Thereafter, as described with reference to FIGS. 1 and 2, the switching device 110 transmits a first call connection request signal to the called terminal 200.

3) When the user of the destination terminal 300 is a subscriber of a ring back tone service, the switching device 110, the ring back tone server 120, and the ring back tone providing device 130 interlock with each other as described with reference to FIGS. 1 and 2, The voice and video ring back tone transmitted from the back tone providing apparatus 130 is sent to the calling terminal 200, the calling terminal 200 outputs the video to the display unit, and the voice is outputted through the speaker or the like.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is capable of numerous modifications and alterations. For example, in the above description, the ring back tone providing device 130 has a ring back tone sound source, but the ring back tone sound source may be stored in a separate ring back tone MCP (Master Content Provide).

100 ... ring back tone providing system
200 ... calling terminal
300 ... incoming terminal

Claims (9)

A system for providing voice and video ring back tone service in a VoLTE voice call,
An exchange for performing VoLTE voice call processing between the calling terminal and the called terminal;
A ringback tone server for storing voice and video ringback tone tone information set for the called terminal; And
A ringback tone providing device for storing a voice and video ringback tone sound source corresponding to the voice and video ringback tone information set for the called terminal and providing a voice and video ringback tone set for the called terminal to the calling terminal,
/ RTI >
Wherein the switching device receives a first call setup request signal for setting the voice and video channel to be released from the calling terminal and transmits a second call setting request signal for setting the voice channel to be released to the called terminal, When receiving the call setup response signal for the second call setup request signal, transmits a third call setup request signal for setting the voice and video channel to be opened to the ring back tone providing apparatus,
Wherein the ring back tone providing apparatus receives the ring back tone sound source information as a response to the ring back tone sound source information set for the called terminal to the ring back tone server when receiving the third call setting request signal, The apparatus transmits a call setup completion signal set so that the voice and video channels are opened,
The exchange apparatus sends a media session including a voice and video channel for providing a voice and video ringback tone to the calling terminal before the called terminal responds to the VoLTE voice call by transmitting a call setup response signal to the calling terminal A terminal,
Wherein the exchange apparatus transmits a voice and video ring back tone through which the ring back tone providing apparatus reproduces and transmits a voice and video ring back tone sound source corresponding to voice and video ring back tone sound source information set for the called terminal, And provides the voice and video ring back tone to the calling terminal by transmitting to the terminal,
Wherein the switching device transmits a call termination signal to the ring back tone providing device when the call connection completion signal is received in response to the VoLTE voice call from the call receiving terminal and the ring back tone providing device transmits the voice and video ring back tone Stop,
Wherein the switching device transmits a call connection completion signal for releasing the video channel while maintaining the voice channel to the calling terminal so that a VoLTE voice call including only a voice channel is formed between the calling terminal and the switching device, And the voice call is performed through the VoLTE voice call.
delete delete delete delete delete delete delete A method for providing a voice and video ring back tone service in a VoLTE voice call in a system according to claim 1,
The switching device receives a first call setup request signal set to release a voice and video channel as a first call setup request signal for a VoLTE voice call from the calling terminal and sets a second call setup request to open the voice channel to the called terminal A first step of transmitting a signal;
When the switching device receives the call setup response signal for the second call setup request signal, transmits a third call setup request signal for setting the voice and video channel to be released for voice and video ring back tone transmission to the ring back tone providing device ;
A third step of, when the ring back tone providing apparatus receives the third call setup request signal, requesting the ring back tone server for ring back tone tone information set for the called terminal and receiving ring back tone tone information as a response thereto;
A fourth step of forming a call including a switching device and a voice and video channel by transmitting a call setup completion signal that the voice and video channel is set to be opened by the switching device of the ring back tone providing device; And
The switching device transmits a call setup response signal to the calling terminal so that a media session including a voice and video channel for providing a voice and video ringback tone to the calling terminal before the called terminal responds to the VoLTE voice call, The ring back tone providing apparatus reproduces a voice and video ringback tone sound source corresponding to the voice and video ringback tone tone information set for the called terminal and transmits the voice and video ring back tone through the formed media session to the calling terminal A fifth step of providing a voice and video ring back tone to the calling terminal by sending
Lt; / RTI >
Wherein the switching device transmits a call termination signal to the ring back tone providing device when receiving a call connection completion signal in response to a VoLTE voice call from the called terminal,
Wherein the ring back tone providing apparatus stops transmission of voice and video ring back tones,
Wherein the switching device transmits a call connection completion signal for releasing the video channel while maintaining the voice channel to the calling terminal so that a VoLTE voice call including only a voice channel is formed between the calling terminal and the switching device, Wherein the voice call is performed through the VoLTE voice call.

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