WO2016039497A1

WO2016039497A1 - Communication service providing method and system for switching between general communication mode and internet communication mode

Info

Publication number: WO2016039497A1
Application number: PCT/KR2014/008735
Authority: WO
Inventors: 최정우
Original assignee: (주)브릿지모바일
Priority date: 2014-09-10
Filing date: 2014-09-19
Publication date: 2016-03-17
Also published as: KR101605259B1; KR20160030408A

Abstract

A communication service providing method comprises the steps of: establishing a communication connection between a first user terminal and a second user terminal by using one of an internet communication (voice over internet protocol; VoIP) mode or a general communication mode, and; checking the connected state of a communication connection corresponding to the internet communication mode or a communication connection corresponding to the general communication mode, while a communication connection is maintained between the first user terminal and the second user terminal; and determining whether to switch the maintained communication connection to another communication connection by using the connected state of the communication connection corresponding to the internet communication mode or the communication connection corresponding to the general communication mode.

Description

Method and system for providing call service for switching normal call mode and internet call mode

The present invention relates to a call service providing system and method for switching a general call mode and an internet call mode, and more particularly, to a call connection or a general call mode corresponding to a Voice Over Internet Protocol (VoIP) mode. Is a technology for selectively establishing a call connection between user terminals.

The call service providing technology establishes a call connection between user terminals using an internet call communication network such as 3G, LTE or Wi-Fi, or uses a public switched telephone network (PSTN) network. The present invention relates to a technology for establishing a call connection between terminals as a general call connection.

However, in the existing call service providing technology, after an internet call connection is established between user terminals in response to a call request, as the connection state of the Internet call communication network of the user terminals becomes unstable, the Internet maintained between the user terminals There is a problem that the call connection is interrupted.

Accordingly, in the present specification, while the call connection between the user terminals is maintained, by checking the connection state of the call connection corresponding to the Internet call mode or the call connection corresponding to the normal call mode, the available call connection is maintained without interruption. We propose technique to do it.

Embodiments of the present invention, by maintaining the connection state of the call connection corresponding to the Internet call mode or the normal call mode while the call connection between the user terminal is maintained, so that the available call connection without disconnection Provides a method and system for providing a call service to maintain.

In addition, embodiments of the present invention may notify the user terminals of the information on the call connection maintained between the user terminals, or confirm the connection state of the call connection corresponding to the Internet call mode or the normal call mode. The present invention provides a method and system for providing a call service for notifying user terminals of information on a call connection switched according to information indicating that the connection has been made or the connection state of the call connection between the identified user terminals.

Method for providing a call service according to an embodiment of the present invention is to establish a call connection between the first user terminal and the second user terminal using any one of the Voice Over Internet Protocol (VoIP) mode or the general call mode step; Checking a connection state of a call connection corresponding to the internet call mode or a call connection corresponding to the normal call mode while the call connection between the first user terminal and the second user terminal is maintained; And determining whether to switch the maintained call connection to another call connection by using the connection state of the call connection corresponding to the internet call mode or the call connection corresponding to the general call mode.

The determining of the connection state of the call connection corresponding to the internet call mode or the call connection corresponding to the general call mode may include determining whether the connection state of the call connection corresponding to the internet call mode is equal to or greater than a preset Internet call quality. It may include a step.

The call service providing method may further include switching a call connection between the first user terminal and the second user terminal based on the determination result.

The step of switching a call connection between the first user terminal and the second user terminal may include a call connection between the first user terminal and the second user terminal corresponding to the internet call mode or the general call mode. It may be a step of switching to any one of the call connection corresponding to the.

The step of switching a call connection between the first user terminal and the second user terminal may include displaying information about the switched call connection by using the at least one method of display, sound, or vibration in the first user terminal or the second user. The method may further include notifying the terminal.

The establishing of the call connection between the first user terminal and the second user terminal may include establishing a call connection corresponding to the internet call mode or establishing the call connection before establishing the call connection between the first user terminal and the second user terminal. The method may include identifying a connection state of a call connection corresponding to the general call mode.

The step of establishing a call connection between the first user terminal and the second user terminal may include transferring a call connection between the first user terminal and the second user terminal to a call connection corresponding to the internet call mode or the general call mode. It may be the step of establishing one of the corresponding call connection.

The call service providing method may further include notifying the first user terminal or the second user terminal of the information on the maintained call connection in at least one of display, sound or vibration manner.

The determining of the connection state of the call connection corresponding to the internet call mode or the call connection corresponding to the normal call mode may include a connection state of a call connection corresponding to the internet call mode or a call connection corresponding to the normal call mode. And notifying the first user terminal or the second user terminal of the information indicating that the information is confirmed by at least one of display, sound or vibration.

The system for providing a call service according to an embodiment of the present invention establishes a call connection between a first user terminal and a second user terminal using any one of a Voice Over Internet Protocol (VoIP) mode or a general call mode. Call connection unit; A confirmation unit checking a connection state of a call connection corresponding to the internet call mode or a call connection corresponding to the normal call mode while the call connection between the first user terminal and the second user terminal is maintained; And a determination unit for determining whether to switch the maintained call connection to another call connection by using a connection state of the call connection corresponding to the internet call mode or the call connection corresponding to the general call mode.

The confirmation unit may determine whether a connection state of a call connection corresponding to the internet call mode is equal to or greater than a preset Internet call quality.

The confirmation unit determines the connection state of the call connection corresponding to the internet call mode or the call connection corresponding to the normal call mode before establishing a call connection between the first user terminal and the second user terminal in the call connection unit. Can be identified.

The call service providing system may further include a notification unit which notifies the first user terminal or the second user terminal of information about the maintained call connection by at least one of display, sound, and vibration.

The call connection unit may switch a call connection between the first user terminal and the second user terminal based on the determination result.

The notification unit may notify the first user terminal or the second user terminal of the information on the switched call connection by at least one of display, sound or vibration.

Embodiments of the present invention, by maintaining the connection state of the call connection corresponding to the Internet call mode or the normal call mode while the call connection between the user terminal is maintained, so that the available call connection without disconnection It is possible to provide a call service providing method and system.

In addition, embodiments of the present invention may notify the user terminals of the information on the call connection maintained between the user terminals, or confirm the connection state of the call connection corresponding to the Internet call mode or the normal call mode. The present invention can provide a method and system for providing a call service for notifying user terminals of information about a call connection switched according to information indicating that the connection has been made or the connection state of the call connection between the identified user terminals.

1 is a view showing a call service providing system according to an embodiment of the present invention.

2 is a view showing a call service providing method according to an embodiment of the present invention.

3 is a view showing in detail the call connection switching process according to an embodiment of the present invention.

4 is a diagram illustrating a user terminal notified of information related to a call connection between user terminals according to one embodiment of the present invention.

5 is a block diagram showing a call service providing system according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited or limited by the embodiments. Also, like reference numerals in the drawings denote like elements.

Referring to FIG. 1, the call service providing system 110 according to an exemplary embodiment of the present invention connects a call connection between the first user terminal 120 and the second user terminal 130 to correspond to an internet call mode. Alternatively, by selectively establishing a call connection corresponding to the general call mode, the call connection between the first user terminal 120 and the second user terminal 130 may be maintained without disconnection. In this case, the call service providing system 110 is illustrated as a separate server in the figure, but is not limited or limited to the above, and an application that performs a function of the call service providing system includes the first user terminal 120 and the second user terminal. It may be implemented in a manner that is installed at 130. Of course, the applications installed in the first user terminal 120 and the second user terminal 130 may perform only some functions of the call service providing system 110, and the remaining functions may be operated in a separate server 130. . The configuration of the call service providing system 110 will be described with reference to FIG. 5.

Specifically, while the call service providing system 110 maintains a call connection between the first user terminal 120 and the second user terminal 130 established by using one of an internet call mode and a general call mode, By checking the connection state of the call connection corresponding to the internet call mode or the call connection corresponding to the normal call mode, it is determined whether to switch the maintained call connection to another call connection. For example, when the call connection between the first user terminal 120 and the second user terminal 130 is established and maintained either as a call connection corresponding to the Internet call mode or a call connection corresponding to the normal call mode, The call service providing system 110 may determine whether to switch the maintained call connection to another call connection based on the connection state of the call connection corresponding to the confirmed internet call mode or the call connection corresponding to the normal call mode. have. At this time, the call service providing system 110 determines whether the connection state of the call connection corresponding to the Internet call mode guarantees a preset Internet call quality, thereby corresponding to the call connection or the general call mode corresponding to the Internet call mode. You can check the connection status of the call connection. Here, the Internet call quality may be evaluated by various factors such as data transmission / reception rate, data transmission failure rate, Mean Opinion Score (MOS), Perceptual Evaluation of Speech Quality (PESQ), signal to noise ratio, and the like.

Accordingly, the call service providing system 110 may maintain the available call connection without interruption by switching the call connection between the first user terminal 120 and the second user terminal 130 based on the determination result. Detailed description thereof will be described with reference to FIG. 2.

The call service providing system 110 establishes or switches a call connection between the first user terminal 120 and the second user terminal 130 based on the setting of each of the

user terminals

120 and 130. Can be performed. For example, when a call connection establishment / transition operation is set to be automatically performed in each of the

user terminals

120 and 130, the call service providing system 110 activates a call function of the

user terminals

120 and 130. In response to (eg, when an input of a call button is received), an operation of establishing or switching a call connection between the first user terminal 120 and the second user terminal 130 may be automatically performed. In this case, since the call service providing system 110 operates based on the call function of the

user terminals

120 and 130, the phone book of the

user terminals

120 and 130 may be used as it is.

In addition, the call service providing system 110 may include the first user terminal 120 and the second user terminal (described above) based on whether the

user terminals

120 and 130 subscribe to the call connection establishment / transition service. 130 may optionally perform the operation of establishing or diverting a call connection. Accordingly, the call service providing system 110 checks the connection state of the call connection corresponding to the internet call mode or the call connection corresponding to the normal call mode, and the

user terminals

120 and 130 establish / convert the call connection. By additionally checking whether or not the service is subscribed, the call connection establishment / transition service may be provided only to the subscribed

user terminals

120 and 130.

In addition, the call service providing system 110 notifies the first user terminal 120 or the second user terminal 130 of information related to a call connection between the first user terminal 120 and the second user terminal 130. can do. Detailed description thereof will be described with reference to FIG. 4.

Referring to FIG. 2, the call service providing system 210 according to an exemplary embodiment of the present invention uses the first user terminal 220 and the second user terminal 230 by using any one of an internet call mode and a general call mode. Establish a currency connection between At this time, the call service providing system 210 corresponds to a call connection or a general call mode corresponding to an internet call mode before establishing a call connection between the first user terminal 220 and the second user terminal 230. The first user terminal 220 and the second user terminal 230 are identified based on the connection state of the call connection corresponding to the identified Internet call mode or the general call mode by identifying the connection state of the call connection. The call connection therebetween may be established as either a call connection corresponding to the internet call mode or a call connection corresponding to the normal call mode.

For example, in response to a call request (not shown in the drawing) received from the first user terminal 220 or the second user terminal 230, the first user terminal 220 and the second user terminal 230. As a result of the connection state of the call connection corresponding to the Internet call mode or the connection state of the call connection corresponding to the normal call mode being identified, the connection state of the call connection corresponding to the Internet call mode corrects the preset Internet call quality. If it is determined that the call service providing system 210 may establish a call connection between the first user terminal 220 and the second user terminal 230 as a call connection corresponding to the Internet call mode.

On the other hand, in response to a call request received from the first user terminal 220 or the second user terminal 230, the Internet call mode between the first user terminal 220 and the second user terminal 230 corresponds to. If the connection state of the call connection corresponding to the call connection or the general call mode is identified, and it is determined that the connection state of the call connection corresponding to the Internet call mode does not guarantee the preset Internet call quality, the call service The providing system 210 may establish a call connection between the first user terminal 220 and the second user terminal 230 as a call connection corresponding to a general call mode.

Here, the preset Internet call quality is a reference data transmission / reception rate of the communication network for supporting a call connection corresponding to the Internet call mode (for example, a speed when the time required for receiving a response is 100 ms after transmission of data) or a reference point. It may mean a voice data transmission failure rate, a Mean Opinion Score (MOS), a Perceptual Evaluation of Speech Quality (PESQ), or a signal-to-noise ratio. Therefore, the process of determining whether the connection state of the call connection corresponding to the Internet call mode is equal to or higher than the preset Internet call quality is a call corresponding to the Internet call mode between the first user terminal 120 and the second user terminal 130. It is determined whether the data transmission / reception speed of the connection is higher than or equal to the reference data transmission / reception rate, or the voice data transmission failure rate of the call connection corresponding to the internet call mode between the first user terminal 120 and the second user terminal 130 is the reference voice data. It may mean a process of determining whether the rate is less than a transmission failure rate.

At this time, the call service providing system 210 may notify the first user terminal 220 or the second user terminal 230 of the information on the established call connection in at least one of display, sound or vibration. Can be.

Subsequently, the call service providing system 210 maintains the call connection between the first user terminal 220 and the second user terminal 230, and the call corresponding to the call connection or the general call mode corresponding to the internet call mode. Check the connection status of the connection. Here, the call service providing system 210 determines whether the connection state of the call connection corresponding to the internet call mode between the first user terminal 220 and the second user terminal 230 is equal to or higher than a preset internet call quality. The connection state of the call connection between the first user terminal 220 and the second user terminal 230 may be checked. For example, the call service providing system 210 may check the connection state of the call connection corresponding to the internet call mode or the call connection corresponding to the general call mode according to a preset period.

At this time, the call service providing system 210 may display information indicating that the connection state of the call connection corresponding to the Internet call mode or the call connection corresponding to the general call mode is confirmed by at least one of display, sound, or vibration. The first user terminal 220 or the second user terminal 230 may be notified.

The call service providing system 210 then uses the connection state of the call connection corresponding to the Internet call mode or the call connection corresponding to the normal call mode to determine whether to switch the held call connection to another call connection. do.

For example, when the maintained call connection is a call connection corresponding to the normal call mode, and the connection state of the call connection corresponding to the confirmed internet call mode is determined to be equal to or higher than the preset Internet call quality, the call service providing system 210 ) May determine to switch the call connection (call connection corresponding to the normal call mode) between the maintained first user terminal 220 and the second user terminal 230 to the call connection corresponding to the internet call mode. On the other hand, when the maintained call connection is a call connection corresponding to the normal call mode, and it is determined that the connection state of the call connection corresponding to the confirmed internet call mode is less than the preset Internet call quality, the call service providing system 210 May determine to use the call connection (call connection corresponding to the normal call mode) between the first user terminal 220 and the second user terminal 230 that are maintained without being switched.

In another example, if the maintained call connection is a call connection corresponding to the Internet call mode, and it is determined that the connection state of the call connection corresponding to the confirmed Internet call mode is less than the preset Internet call quality, the call service providing system ( 210 may determine to switch the call connection (call connection corresponding to the internet call mode) between the first user terminal 220 and the second user terminal 230 maintained to a call connection corresponding to the normal call mode. . On the other hand, if the maintained call connection is a call connection corresponding to the Internet call mode, and the connection state of the call connection corresponding to the confirmed Internet call mode is determined to be equal to or higher than a preset Internet call quality, the call service providing system 210 May determine to use the call connection (call connection corresponding to the Internet call mode) between the first user terminal 220 and the second user terminal 230 that are maintained.

Therefore, the call service providing system 210 may selectively switch the call connection between the first user terminal and the second user terminal based on the determination result. At this time, the call service providing system 210 establishes a call connection between the first user terminal 220 and the second user terminal 230, either a call connection corresponding to an internet call mode or a call connection corresponding to a normal call mode. You can switch to one.

For example, when it is determined to switch from the call connection corresponding to the general call mode to the call connection corresponding to the internet call mode, the call service providing system 210 may call based on the call between the first user terminal and the second user terminal. The connection can be switched to a call connection corresponding to the Internet call mode. In addition, when it is determined to switch from a call connection corresponding to the Internet call mode to a call connection corresponding to the normal call mode, the call service providing system 210 may establish a call connection between the first user terminal and the second user terminal based on the call connection. Switch to the call connection corresponding to the normal call mode.

In this case, the call service providing system 210 may notify the first user terminal 220 or the second user terminal 230 of the information on the switched call connection in at least one of display, sound or vibration. .

As such, the call service providing system 210 according to an embodiment of the present invention may be connected to a call connection or a general call mode corresponding to the Internet call mode while the call connection between the user terminals 220 and 230 is maintained. By checking the connection state of the corresponding call connection and switching the call connection maintained on the basis of the confirmed connection state to another call connection or using the same, the available call connection can be maintained seamlessly.

Referring to FIG. 3, the call service providing system according to an exemplary embodiment of the present invention provides a call connection corresponding to an internet call mode according to a preset period while a call connection between a first user terminal and a second user terminal is maintained. Alternatively, by checking the connection state of the call connection corresponding to the general call mode, the call connection maintained using the confirmed connection state of the call connection may be switched to another call connection or may be used as it is.

For example, when the call connection between the first user terminal and the second user terminal is established as a call connection corresponding to the normal call mode, the call service providing system according to a preset period, the call connection corresponding to the Internet call mode Alternatively, the connection status of the call connection corresponding to the normal call mode can be continuously checked.

At this time, the call service providing system corresponds to the Internet call mode based on the settings of each of the first user terminal and the second user terminal (eg, a period for confirming the call connection, a setting related to maintaining and switching the call connection). The connection state of the call connection corresponding to the call connection or the normal call mode can be checked. More specifically, for example, when it is set to perform only the transition from the call connection corresponding to the general call mode to the call connection corresponding to the internet call mode, the call service providing system may preset the connection state of the call connection corresponding to the internet call mode. By determining only whether the internet call quality is higher, it is possible to make only the switching from the call connection corresponding to the general call mode to the call connection corresponding to the internet call mode.

If the connection status of the call connection corresponding to the Internet call mode or the call connection corresponding to the normal call mode is continuously checked, and the connection state of the call connection corresponding to the Internet call mode is determined to be higher than or equal to the preset Internet call quality, The service providing system may determine to switch the call connection corresponding to the general call mode maintained to the call connection corresponding to the internet call mode, and perform the operation of switching to the call connection corresponding to the internet call mode.

At this time, since the switching operation of the call connection takes a certain time, during the switching operation, the call connection between the first user terminal and the second user terminal may be maintained as the call connection corresponding to the existing general call mode.

When the switching operation is completed, the call service providing system converts the call connection corresponding to the general call mode into a call connection corresponding to the internet call mode, and as a call connection between the first user terminal and the second user terminal, the internet call mode. It may provide a call connection corresponding to the.

4, a call service providing system according to an embodiment of the present invention displays information on a call connection between a first user terminal and a second user terminal that is initially established and maintained, including at least one of display, sound, or vibration. The first user terminal or the second user terminal.

In this case, the call service providing system may notify the first user terminal or the second user terminal of the information on the call connection that is initially established and maintained by at least one of display, sound or vibration. For example, as shown in (a), when a call connection corresponding to a general call mode is initially established and maintained, the call service providing system displays information about the call connection corresponding to the normal call mode in text 410. You can apply preset graphic effects.

In addition, although not shown in the drawing, when a call connection corresponding to a general call mode is initially established and maintained, the call service providing system is a general call mode that is initially established and maintained in a manner of sound or vibration preset according to a user terminal. May notify the information about the call connection corresponding to the. For example, when the preset sound associated with the call connection corresponding to the general call mode is a new cry and the preset vibration associated with the call connection corresponding to the normal call mode is one vibration, the call service providing system By reproducing the new cry and generating one vibration of the user terminal, the user terminal can be notified of the information on the call connection corresponding to the general call mode.

In addition, the call service providing system, while the call connection between the first user terminal and the second user terminal is maintained, in the process of checking the connection state of the call connection corresponding to the Internet call mode or the call connection corresponding to the normal call mode Information indicating that the connection state of the call connection corresponding to the Internet call mode or the call connection corresponding to the general call mode is confirmed to the first user terminal or the second user terminal in at least one of display, sound or vibration mode. You can notify. For example, when the connection state of the call connection corresponding to the Internet call mode is checked while the call connection corresponding to the normal call mode is maintained, as shown in (b), the call service providing system corresponds to the Internet call mode. A predetermined graphic effect may be applied while displaying in text 420 information indicating that the connection status of the call connection is being confirmed. In this case, the graphic effect may be another graphic effect distinguished from the case (a).

In addition, although not shown in the drawings, when the connection state of the call connection corresponding to the Internet call mode is checked while the call connection between the first user terminal and the second user terminal is maintained, the call service providing system is provided to the user terminal. Accordingly, the information indicating that the connection state of the call connection corresponding to the Internet call mode is confirmed may be notified by a preset sound or vibration method. For example, if the sound indicating that the connection state of the call connection corresponding to the Internet call mode or the call connection corresponding to the normal call mode is confirmed is a dog cry, and the preset vibration is 5 consecutive vibrations, the call service The providing system can notify the user terminal of the information indicating that the connection state of the call connection corresponding to the internet call mode is confirmed by reproducing the dog cry and generating five vibrations of the user terminal.

If it is determined to switch the maintained call connection to another call connection, the call service providing system switches the call connection based on the determination result and, in response, displays, sound or vibration information about the switched call connection. The first user terminal or the second user terminal may be notified in at least one manner. For example, as shown in (c), when the call connection corresponding to the normal call mode is switched from the call connection corresponding to the Internet call mode, the call service providing system may display information about the call connection corresponding to the Internet call mode. While displaying at 430, a preset graphic effect may be applied. In this case, the graphic effect may be another graphic effect distinguished from the case (a) and the case (c).

In addition, although not shown in the drawing, when switched to the call connection corresponding to the Internet call mode, the call service providing system is connected to the call connection corresponding to the switched Internet call mode in a manner of sound or vibration preset according to the user terminal. Information can be notified. For example, when the preset sound associated with the call connection corresponding to the internet call mode is the sound of crying, and the preset vibration related to the call connection corresponding to the Internet call mode is two vibrations, the call service providing system is By reproducing the howling sound and generating two vibrations of the user terminal, it is possible to notify the user terminal of the information on the call connection corresponding to the internet call mode.

Referring to FIG. 5, a call service providing system according to an exemplary embodiment of the present invention may include a call connection unit 510, a confirmation unit 520, a determination unit 530, and a notification unit 540.

The call connection unit 510 establishes a call connection between the first user terminal and the second user terminal by using either a Voice Over Internet Protocol (VoIP) mode or a general call mode.

In this case, the call connection unit 510 may establish a call connection between the first user terminal and the second user terminal as either a call connection corresponding to an internet call mode or a call connection corresponding to a general call mode.

The confirmation unit 520 checks the connection state of the call connection corresponding to the internet call mode or the call connection corresponding to the normal call mode while the call connection between the first user terminal and the second user terminal is maintained.

At this time, the verification unit 520 may determine whether the connection state of the call connection corresponding to the Internet call mode is a predetermined Internet call quality or more.

In addition, the verification unit 520 before the call connection unit 510 establishes a call connection between the first user terminal and the second user terminal, the call connection corresponding to the Internet call mode or the normal call mode It can identify the connection state of.

The determination unit 530 determines whether to switch the held call connection to another call connection by using the connection state of the call connection corresponding to the internet call mode or the call connection corresponding to the normal call mode.

At this time, the determination unit 530 may transmit the determined result to the confirmation unit 520 to cause the confirmation unit 520 to switch the call connection between the first user terminal and the second user terminal. Here, the verification unit 520 is configured to establish a call connection between the first user terminal and the second user terminal based on the determination result transmitted from the determination unit 530 corresponding to the call connection or the general call mode corresponding to the Internet call mode. You can switch to either of the call connections.

The notification unit 540 may notify the first user terminal or the second user terminal of the information on the maintained call connection in at least one of display, sound or vibration.

In addition, the notification unit 540 may display information indicating that the connection state of the call connection corresponding to the Internet call mode or the call connection corresponding to the general call mode is confirmed, by using at least one method of display, sound, or vibration. The terminal may notify the terminal or the second user terminal.

In addition, the notification unit 540 may notify the first user terminal or the second user terminal of the information on the switched call connection by at least one of display, sound or vibration.

Although the embodiments have been described by the limited embodiments and the drawings as described above, various modifications and variations are possible to those skilled in the art from the above description. For example, the described techniques may be performed in a different order than the described method, and / or components of the described systems, structures, devices, circuits, etc. may be combined or combined in a different form than the described method, or other components. Or even if replaced or substituted by equivalents, an appropriate result can be achieved.

Therefore, other implementations, other embodiments, and equivalents to the claims are within the scope of the claims that follow.

Claims

Establishing a call connection between the first user terminal and the second user terminal using either a Voice Over Internet Protocol (VoIP) mode or a general call mode;

Checking a connection state of a call connection corresponding to the internet call mode or a call connection corresponding to the normal call mode while the call connection between the first user terminal and the second user terminal is maintained; And

Determining whether to switch the maintained call connection to another call connection using the connection state of the call connection corresponding to the internet call mode or the call connection corresponding to the normal call mode.

Call service providing method comprising a.
The method of claim 1,

Checking the connection state of the call connection corresponding to the internet call mode or the call connection corresponding to the normal call mode

Determining whether a connection state of a call connection corresponding to the internet call mode guarantees a preset internet call quality;

Call service providing method comprising a.
The method of claim 1,

Switching a call connection between the first user terminal and the second user terminal based on the determination result;

Call service providing method further comprising.
The method of claim 2,

Determining whether the connection state of the call connection corresponding to the internet call mode guarantees a preset internet call quality

Based on at least one of a transmission / reception rate of data, a transmission failure rate of data, Mean Opinion Score (MOS), Perceptual Evaluation of Speech Quality (PESQ), or a signal-to-noise ratio for a call connection corresponding to the Internet call mode; And determining whether the connection state of the call connection corresponding to the internet call mode guarantees a preset internet call quality.
The method of claim 3,

Notifying the first user terminal or the second user terminal of the information on the diverted call connection in at least one of display, sound or vibration manner.

Call service providing method further comprising.
The method of claim 1,

The step of establishing a call connection between the first user terminal and the second user terminal is

Before establishing a call connection between the first user terminal and the second user terminal, identifying a connection state of the call connection corresponding to the internet call mode or the call connection corresponding to the normal call mode.

Call service providing method comprising a.
The method of claim 1,

The step of establishing a call connection between the first user terminal and the second user terminal is

Establishing a call connection between the first user terminal and the second user terminal as a call connection corresponding to the normal call mode;

Determining whether to switch the maintained call connection to another call connection

Converting a call connection between the first user terminal and the second user terminal into a call connection corresponding to the internet call mode;

Call service providing method comprising a.
The method of claim 1,

Notifying the first user terminal or the second user terminal of the information on the maintained call connection in at least one of display, sound or vibration manner.

Call service providing method further comprising.
The method of claim 1,

Checking the connection state of the call connection corresponding to the internet call mode or the call connection corresponding to the normal call mode

Display information indicating that the connection state of the call connection corresponding to the Internet call mode or the call connection corresponding to the general call mode is confirmed by at least one of display, sound or vibration in the manner of the first user terminal or the second. Notifying the user terminal

Call service providing method comprising a.
A call connection unit for establishing a call connection between the first user terminal and the second user terminal using any one of a Voice Over Internet Protocol (VoIP) mode or a general call mode;

A confirmation unit checking a connection state of a call connection corresponding to the internet call mode or a call connection corresponding to the normal call mode while the call connection between the first user terminal and the second user terminal is maintained; And

A determination unit that determines whether to switch the maintained call connection to another call connection by using a connection state of the call connection corresponding to the internet call mode or the call connection corresponding to the general call mode

Call service providing system comprising a.
The method of claim 10,

The verification unit

And determining whether a connection state of a call connection corresponding to the internet call mode is equal to or higher than a preset internet call quality.
The method of claim 10,

The verification unit

A call for identifying a connection state of a call connection corresponding to the internet call mode or a call connection corresponding to the normal call mode before establishing a call connection between the first user terminal and the second user terminal in the call connection unit; Service delivery system.
The method of claim 10,

A notification unit for notifying the first user terminal or the second user terminal of information about the maintained call connection by at least one of display, sound or vibration;

Call service providing system further comprising.
The method of claim 13,

The call connection portion

A call service providing system for switching a call connection between the first user terminal and the second user terminal based on the determination result.
The method of claim 14,

The notification unit

And inform the first user terminal or the second user terminal of the information on the switched call connection in at least one of display, sound or vibration.