KR100902227B1

KR100902227B1 - Method for providing automatic migrating function for video telecommunication, and mobile communication system therefor

Info

Publication number: KR100902227B1
Application number: KR20080023120A
Authority: KR
Inventors: 김진식
Original assignee: 에스케이 텔레콤주식회사
Priority date: 2008-03-13
Filing date: 2008-03-13
Publication date: 2009-06-11

Abstract

The present invention provides a video call automatic transition function for requesting a caller's mobile communication terminal to switch to a video call when the called party is connected to the synchronous network switch when the video call is made. It relates to a method for providing and a mobile communication system for the same.

When the video call request message transmitted from the calling mobile terminal is received, the present invention requests and receives routing information from the home location register to determine whether the exchange roaming by the called mobile terminal is an asynchronous network switch. An asynchronous network switch which transmits a transition request message for requesting a switch to a video call to the called-side synchronization network switch when the network switch is not roamed; And receiving a transition request message from the calling asynchronous network switch, transmitting a video call permission query message to confirm whether to switch to a video call to the called mobile terminal, and switching from the called mobile terminal to the video call. When receiving the response, the requesting and receiving asynchronous network RF sensitivity information to the called mobile communication terminal, and if the asynchronous network RF sensitivity is more than a predetermined reference value, and sends a redirection message to the called mobile communication terminal, asynchronous Synchronous network switch for requesting video call call connection to the network switch; including, when the other party mobile communication terminal is connected to the synchronization network switch when the video call is out, if the video call is impossible, the mobile terminal connected to the synchronization network exchange during incoming alert Transmit to asynchronous network by sending video call permission query message to communication terminal In order to induce a video call, even if the called mobile terminal is connected to a synchronous network switch, there is an effect that the video call can be performed, thereby increasing the video call utilization rate.

Description

Method for Providing Automatic Video Transition Function and Mobile Communication System for It {Method for Providing Automatic Migrating Function for Video Telecommunication, And Mobile Communication System therefor}

The present invention relates to a method for providing an automatic video call transition function and a mobile communication system for the same. More particularly, when a called party is connected to a synchronous network switch when a video call is made, video call is impossible. During the alerting process, when the video call permit query is sent to the called party and the accepted response is received, the called party transitions to the asynchronous network, and during the voice call, it checks the asynchronous network RF environment of the mobile communication terminal connected to the synchronous network switch. The present invention relates to a method for providing a video call automatic transition function for automatically switching to an asynchronous network when a counterpart mobile communication terminal is available, and a mobile communication system therefor.

Currently, DBDM (Dual Band Dual Modem) mobile communication terminals are provided with mobile communication services while transitioning between CDMA 2000-1X and WCDMA networks according to RF environment. In this environment, when the WCDMA DBDM mobile terminal is tuned to the 1X network, the video call connection is prevented from other WCDMA mobile terminal due to various problems including a charge problem.

Therefore, when the user connects the video call to the WCDMA mobile terminal using the DBDM mobile communication terminal using the WCDMA mobile communication terminal, the video call cannot be connected when the incoming DBDM mobile communication terminal is synchronized with the 1X network. There is a problem to connect the call.

Due to the above problems, even if the mobile communication subscriber wants to conduct a video call, there is a problem that the video call cannot be made at the moment according to the receiving network type of the counterpart mobile communication terminal.

The present invention has been made to solve the above-mentioned problems, and when the video call is made, the other party's mobile communication terminal is connected to the synchronous network switch, so that the video call is not possible. There is a technical problem to provide a method for providing an automatic video call transition function to induce a transition to the asynchronous network by transmitting a and a mobile communication system for this.

In addition, the present invention is to check the asynchronous network RF environment of the mobile communication terminal connected to the synchronous network switch during the voice call, if the environment can be transitioned to the asynchronous network, the mobile communication terminal transitions to the asynchronous network service to enable a video call The purpose is to provide.

The present invention for achieving the above object is a method for providing a video call automatic transition function,

a) requesting and receiving routing information to a home location register when the calling asynchronous network switch receives the video call request message transmitted from the calling mobile terminal; b) checking, by the calling asynchronous network switch, the routing information received from the home location register to determine whether the called mobile terminal is roamed to the asynchronous network switch to enable a video call call connection; c) as a result of step b), when the called mobile communication terminal roams to the synchronous network switch, the calling asynchronous network switch transmits a video call request message to the called mobile communication terminal through the called-side synchronization network switch. step; d) in response to receiving a video call permission response message from the called mobile terminal, requesting asynchronous network RF sensitivity information from the called mobile terminal to the called mobile terminal; e) when the asynchronous network RF sensitivity information received from the called mobile terminal is compared with a preset reference value and the asynchronous network RF sensitivity is equal to or greater than the reference value, a redirection message is sent to the called mobile terminal. Sending a request message to the calling asynchronous network switch and reconnecting to the video call call; And f) when the calling asynchronous network exchange receives a request message to reconnect to the video calling call from the called synchronous network exchange, attempting to connect with the called asynchronous network exchange to establish a video call call.

In the step c), when the originating asynchronous network exchange transmits an active transition request message for a video call to the called side synchronization network exchange, the called side synchronization network exchange sends a video call permission query message to the called mobile communication terminal. Call request message).

Step f) includes: f-1) the originating asynchronous network switch receiving a request message to reconnect to the video call call from the called side synchronization network switch; f-2) the originating asynchronous network switch requesting and receiving routing information from the home location register to confirm whether the called mobile terminal has transitioned to the asynchronous network switch; And f-3) when the called-party mobile communication terminal transitions to an asynchronous network switch, the calling-side asynchronous network exchange attempts to connect with the called-side asynchronous network switch to establish a video call call, and the previous called party that is making the voice call connection. Disconnecting from the synchronous network switch; preferably.

As a result of checking in f-2), when the called-party mobile communication terminal does not transition to the asynchronous network switch, the calling-side asynchronous network switch transmits a voice call connection request message to the called-side synchronization network switch to perform voice call connection. It is preferable to further include;

After the voice call connection, the called-side sync network switch checks the asynchronous network RF sensitivity of the called-side mobile communication terminal, and if the asynchronous network RF sensitivity is equal to or greater than the reference value, inquires whether to switch to the video call with the called-side mobile communication terminal. It is preferable to further include; transmitting a message to say.

Another embodiment of the present invention provides a) a step of requesting and receiving an asynchronous network RF sensitivity from the called mobile terminal to the called mobile terminal every predetermined period when a voice call is connected between the calling mobile terminal and the called mobile terminal. ; b) when the called-side synchronous network switch compares the asynchronous network RF sensitivity with a preset reference value, and transmits a message to the called-party mobile communication terminal to inquire whether to switch to a video call when the asynchronous network RF sensitivity is higher than the reference value. step; c) when a response message is received from the called mobile communication terminal to allow a switch to a video call, the called synchronization network switch sends a redirection message to the called mobile communication terminal, and then to the calling asynchronous network switch. Sending a request message to reconnect to a video call call; d) the originating asynchronous network switch requesting and receiving routing information from the home location register to confirm whether the called mobile terminal has transitioned to the asynchronous network switch; And e) when the called mobile communication terminal transitions to an asynchronous network switch, the calling asynchronous network exchange attempts to connect with the called asynchronous network switch, establishes a video call call, and connects the previous called sync network to which the voice call is connected. Disconnecting from the exchange.

Another invention is a mobile communication system for providing a video call automatic transition function,

Upon receiving the video call request message transmitted from the calling mobile terminal, request and receive routing information from the home location register to check whether the roaming exchange terminal is the asynchronous network switch. An asynchronous network switch, when not roaming, transmitting a transition request message requesting a switch to a video call to the called-side synchronization network switch; And receiving a transition request message from the calling asynchronous network switch, transmitting a video call permission query message to confirm whether to switch to a video call to the called mobile terminal, and switching from the called mobile terminal to the video call. When receiving a response to allow, request and receive asynchronous network RF sensitivity information to the called-party mobile communication terminal, and if the asynchronous network RF sensitivity is more than a predetermined reference value, and transmits a redirection message to the called-party mobile communication terminal, Includes; a synchronous network switch for requesting a video call call connection to the asynchronous network switch.

In another aspect of the present invention, upon receiving a video call request message transmitted from a calling mobile terminal, requesting and receiving routing information from a home location register to determine whether a roaming exchange terminal is an asynchronous network switch. A video call availability check unit for checking whether the called party is in a state capable of a video call; A transition request unit for transmitting a transition request message for a video call to a called-side sync network switch when the called-party mobile communication terminal is not roamed to the asynchronous network switch as a result of checking the video call availability check unit; And a call connection processing unit that performs a procedure related to call connection.

In another exemplary embodiment of the present invention, when a transition request message is received from an originating asynchronous network switch, a video call permission query message confirming whether to switch to a video call is transmitted to a called mobile communication terminal roaming with the synchronous network switch. An asynchronous network state information request unit for requesting and receiving asynchronous network RF sensitivity information from a receiving mobile communication terminal upon receiving a response to allow a switch to a video call from the mobile terminal; Whether or not a video call is determined by the called mobile communication terminal to be able to make a video call when the asynchronous network RF sensitivity information received from the called mobile communication terminal is compared with a preset reference value and the asynchronous network RF sensitivity is equal to or larger than a preset reference value. Determination unit; A reset request unit for transmitting a redirection message for requesting a switch to a video call to a called-party mobile communication terminal capable of making a video call; And a call connection processing unit that performs a call connection procedure including a procedure for requesting a video call call connection to an asynchronous network switch when the reset request unit transmits a reset message to the called-party mobile communication terminal.

In another aspect, the present invention is a mobile communication system for providing an automatic video call transition function, upon receiving a video call request message transmitted from a calling mobile terminal, requests and receives routing information from a subscriber information management server and moves to a called party. If the communication terminal checks whether the roamed data service node is a synchronous network data service node, and if the synchronous network data service node is roamed, it sends a transition request message for requesting switching to a video call to the called synchronous network data service node. Transmitting data service node; And when the transition request message is received from the calling party data service node, transmits a video call permission query message to confirm whether to switch to the video call to the called-party mobile communication terminal, and switches from the called-party mobile terminal to the video call. When receiving a response to allow, request and receive asynchronous network RF sensitivity information to the called-party mobile communication terminal, and if the asynchronous network RF sensitivity is more than a predetermined reference value, and transmits a redirection message to the called-party mobile communication terminal, And a synchronization network data service node for requesting a video call call connection to the data service node.

When the data service node of the present invention receives the video call request message transmitted from the calling mobile terminal, it requests and receives routing information from the subscriber information management server, and the data service node roams the called mobile terminal. A video call availability check unit for checking whether the call is connected to the data service node; A transition request unit for transmitting a transition request message for a video call to the called-side synchronization network data service node when the called-party mobile communication terminal roams to the synchronous network data service node as a result of confirming whether the video call is possible; And a call connection processing unit that performs a procedure related to call connection.

When the synchronization network data service node of the present invention receives the transition request message from the calling data service node, the synchronization network data service node determines whether to switch to a video call with the called mobile terminal roaming with the synchronization network data service node. An asynchronous network status information request unit which transmits a permission query message and requests and receives asynchronous network RF sensitivity information from the called mobile terminal when receiving a response to allow a switch to a video call from the called mobile terminal; Whether or not a video call is determined by the called mobile communication terminal to be able to make a video call when the asynchronous network RF sensitivity information received from the called mobile communication terminal is compared with a preset reference value and the asynchronous network RF sensitivity is equal to or larger than a preset reference value. Determination unit; A reset request unit for transmitting a redirection message for requesting a switch to a video call to a called-party mobile communication terminal capable of making a video call; And a call connection processing unit that performs a call connection procedure, including a procedure for requesting a video call call connection to a data service node when the reset request unit transmits a reset message to the called-party mobile communication terminal.

As described above, the method for providing the automatic video call transition function of the present invention and the mobile communication system therefor, when the other party's mobile communication terminal is connected to the synchronous network switch when the video call is transmitted, is impossible to receive the video call. Since the video call permission query message is sent to the mobile communication terminal connected to the synchronous network switch to induce a transition to the asynchronous network, even if the called mobile terminal is connected to the synchronous network switch, the video call can be performed. And, there is an advantage that can increase the video call utilization rate.

In addition, the present invention is to check the asynchronous network RF environment of the mobile communication terminal connected to the synchronous network exchange during the voice call, if the environment is possible to transition to an asynchronous network, the mobile communication terminal to asynchronous network to enable a video call Therefore, there is an advantage that can be switched to a video call when the asynchronous network RF environment is good even during a voice call.

The automatic video call transition method disclosed in the present invention will be described by taking an example in which a video call can be performed at the request of the calling party even when the called mobile communication terminal roams with the synchronous network switch.

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

First, FIG. 1 is a diagram illustrating an example of a configuration of a mobile communication system according to the present invention.

When a mobile communication system for providing an automatic transition function for a video call receives a message for requesting a video call connection from the calling mobile terminal 100, it checks the status of the called party to connect a video call call or a voice call call. In response to the video call connection request transmitted from the asynchronous network switch 230 and the calling party that perform the procedure, it is determined whether the video call to the called-party mobile communication terminal 200 is desired, and the video call is asynchronous to the desired terminal. It includes a synchronization network switch 330 for periodically requesting and receiving the network RF sensitivity to switch to a video call.

Hereinafter, for convenience of explanation, the calling mobile communication system 210 and 230 and the calling mobile communication system 310, 330, 410 and 430 are respectively distinguished, and the calling asynchronous network switch, the called-side synchronization network switch and the called party are separated. This is referred to as a side asynchronous network switch.

When the calling side asynchronous network exchanger 230 receives the video call request message transmitted from the calling mobile terminal 100, it requests and receives the routing information (SRI: Send Routing Information) from the home location register 250. Transition request for checking whether the roaming switch is an asynchronous network switch, and if the called-side mobile communication terminal 200 is not roaming to the asynchronous network switch, requesting the switching to the video call to the called-side synchronization network switch 330. Send a message to induce a video call.

When the called-side synchronization network exchanger 330 receives the transition request message from the calling-side asynchronous network exchanger 230, the called-side synchronization network exchanger 330 transmits a video call permission query message to confirm whether to switch to the video call to the called-party mobile communication terminal 200. When receiving a response message allowing the switch to the video call from the called-party mobile communication terminal 200, requesting and receiving asynchronous network RF sensitivity information from the called-party mobile communication terminal 200, the asynchronous network RF sensitivity is When the reference value is greater than the preset reference value, a redirection message is transmitted to the called-party mobile communication terminal 200, and a video call call connection is requested to the calling-side asynchronous network switch 230.

In the automatic transition method for the video call disclosed in FIG. 1, the called-party mobile communication terminal 200 roamed to the synchronous network exchange requests a video call according to the video-call request from the calling party, and the called-party mobile communication terminal 200 When the asynchronous network RF sensitivity of the reference value or more than the video call connection between the calling mobile terminal 100 and the called mobile terminal 200, and the called mobile terminal 200 roamed to the synchronization network switch Requests a video call according to the request of the calling party, and when the video call connection fails because the asynchronous network RF sensitivity is less than the reference value, the asynchronous reception of the called-party mobile communication terminal 200 in which the called-side sync network exchanger 330 is in the voice call. Periodically check the network RF sensitivity, and if the asynchronous network is good, it is classified as a video call connection.

Meanwhile, the mobile communication terminal disclosed in FIG. 1 is a dual band dual modem (DBDM) terminal capable of performing communication with both an asynchronous mobile communication system and a synchronous mobile communication system.

Here, since the mobile communication terminal having the dual band dual modem function periodically measures the RF sensitivity of the synchronous network and the asynchronous network in the terminal itself, the mobile terminal receives the asynchronous network RF sensitivity information request from the called-side synchronous network switch 330. The most recently measured asynchronous network RF sensitivity is transmitted as a response.

If the mobile communication system is an IP network as shown in FIG. 2, the asynchronous network switches 230 and 430 disclosed in FIG. 1 are replaced with data service nodes 510 and 570, and the synchronous network switch 330 is synchronized network data. Replaced with a service node 550, the home location register 250 is replaced with a home subscriber server (HSS) 530.

The HSS is a server that manages subscriber information (location information, authentication information, service information, etc.), and includes both a function of a home location register (HLR) and a function of an authentication center (AUC), as well as in an all-IP network. It is a database system that can manage subscriber information and service information in all existing networks during the evolution to 2.5G / 3G networks.

Hereinafter, for convenience of description, the asynchronous network switch and the data service node will be collectively referred to as "asynchronous network switch", and the synchronous network switch and the synchronous network data service node will be collectively referred to as "synchronous network switch". And HSS will be collectively referred to as Home Location Register.

3 is a diagram showing the configuration of an asynchronous network switch according to the present invention.

As shown, the asynchronous network switch 230 includes a video call availability check unit 231, a transition request unit 233, and a call connection processing unit 235.

In more detail, if the video call availability check unit 231 receives the video call request message transmitted from the calling mobile terminal 100, requests routing information to the home location register 250 (SRI: Send Routing). Information) and the called party's mobile communication terminal 200 checks whether the roamed switch is an asynchronous network switch and checks whether the called party is in a video call state.

When the transition request unit 233 confirms that the video call is possible, the destination mobile communication terminal 200 is not roamed to the asynchronous network switch. Sends a transition request message requesting a switch.

The call connection processing unit 235 performs a procedure related to call connection, including voice call call connection or video call call connection.

4 is a diagram illustrating a configuration of a synchronous network exchange according to the present invention.

As illustrated, the synchronous network switch 330 includes an asynchronous network state information request unit 331, a video call availability determination unit 333, a reset request unit 335, and a call connection processing unit 337.

In more detail, when the asynchronous network state information request unit 331 receives a transition request message from the calling-side asynchronous network switch 230, the asynchronous network state information requesting unit 331 roams with the called-side mobile communication terminal 200 which is roamed with the synchronous network switch. When transmitting a video call permission query message to confirm whether to switch, and receives a response message allowing the transfer to the video call from the destination mobile communication terminal 200, the asynchronous network RF to the destination mobile communication terminal 200 Request and receive sensitivity information.

The video call possibility determination unit 333 compares the asynchronous network RF sensitivity information received from the called mobile terminal 200 with a preset reference value, and when the asynchronous network RF sensitivity is equal to or greater than the preset reference value, the called mobile terminal. 200 determines that a video call is possible.

The reset request unit 335 transmits a redirection message for requesting a switch to the video call to the called-party mobile communication terminal 200 capable of making a video call.

When the reset request unit 335 transmits a reset message to the called-party mobile communication terminal 200, the call connection processing unit 337 requests a video call call connection to the calling-side asynchronous network switch 230. Perform the call connection procedure.

In addition, the call connection processing unit 337 performs a voice call call connection procedure in addition to the procedure related to the video call call connection.

5 is a flowchart illustrating an example of a video call automatic transition method according to the present invention.

First, when the calling side asynchronous network switch 230 receives the video call request message transmitted from the calling mobile terminal 100, it requests the routing information to the home location register 250 (SRI: Send Routing Information) and receives it. (S101).

The calling-side asynchronous network switch 230 checks the routing information received from the home location register 250 to determine whether the called-party mobile communication terminal 200 is roaming to the asynchronous network switch to enable a video call call connection. (S103).

As a result of checking in step S103, when the called-side mobile communication terminal 200 roams to the synchronous network switch, the calling-side asynchronous network switch 230 receives the called-side mobile communication terminal 200 through the called-side synchronous network switch 330. The video call request message is sent to the caller to confirm whether the called party wants to switch to the video call (S105).

In step S105, the process of transmitting the video call request message to the called-party mobile communication terminal 200, when the calling-side asynchronous network switch 230 transmits an active transition request message for the video call to the called-side sync network switch 330. And, the called-side sync network switch 330 transmits the video call permission query message (the video call request message) to the called-party mobile communication terminal 200.

After step S105, when receiving a video call permission response message from the called party's mobile communication terminal 200, the called party's network switch 330 requests and receives asynchronous network RF sensitivity information from the called party's mobile communication terminal 200. (S107).

Subsequently, the called-side sync network switch 330 compares the asynchronous network RF sensitivity information received from the called-side mobile communication terminal 200 with a preset reference value. When the asynchronous network RF sensitivity is equal to or greater than the reference value, the called-side mobile communication terminal ( 200, a redirection message is transmitted, and a request message (Redirection Message) for reconnecting to a video call call is transmitted to the calling asynchronous network switch 230 (S109 to S111).

When the calling asynchronous network switch 230 receives a request message to reconnect to the video call call from the called synchronous network switch 330, it attempts to connect with the called asynchronous network switch 430 to establish a video call call. (S113).

Referring to step S113 in more detail, when the calling-side asynchronous network switch 230 receives a request message from the called-side synchronous network switch 330 to reconnect to a video call call, it requests the routing information to the home location register 250. Receives and checks whether the called mobile terminal 200 has transitioned to the asynchronous network switch 430, and when the called mobile terminal 200 transitions to the asynchronous network switch 430, the calling asynchronous network switch. The 230 attempts to connect with the called party's asynchronous network switch 430 to establish a video call call, and releases the voice call by requesting a disconnection from the previous called party's network switch that is being connected to the voice call.

If the called-party mobile communication terminal 200 does not transition to the asynchronous network switch 430, the calling-side asynchronous network switch 230 transmits a voice call connection request message to the called-side sync network switch 330. Make a voice call connection.

After the voice call is connected, the called-side synchronization network switch 330 checks the asynchronous network RF sensitivity of the called-side mobile communication terminal 200, and when the asynchronous network RF sensitivity is higher than the reference value, the image is sent to the called-side mobile communication terminal 200. A message for inquiring whether or not to switch to a call is transmitted, and upon receiving a permission response message from the called party, a reset message is sent to the called party's mobile communication terminal 200.

On the other hand, as a result of checking in step S103, when the called-party mobile communication terminal 200 roams to the asynchronous network switch, the calling-side asynchronous network switch 230 through the called-side asynchronous network switch 430 through the called-side mobile communication terminal The video call connection with the 200 is performed (S115).

On the other hand, when the confirmation message of step S105, when receiving a response message that does not allow the video call from the destination mobile communication terminal 200, the called-side synchronization network switch 330 performs a voice call call connection procedure (S117) ).

In addition, when the asynchronous network RF sensitivity information received by the called-side sync network switch 330 from the called-side mobile communication terminal 200 in step S109 is compared with a preset reference value, and the asynchronous network RF sensitivity is less than the reference value, the called party The synchronization network switch 330 performs a voice call call connection procedure.

6 is a flowchart illustrating another example of a video call automatic transition method according to the present invention.

When the voice call is connected between the calling mobile terminal and the called mobile terminal, the called-side synchronization network switch 330 requests and receives the asynchronous network RF sensitivity from the called-side mobile communication terminal 200 at predetermined intervals ( S201, S203).

The called-side synchronization network exchanger 330 compares the asynchronous network RF sensitivity with a preset reference value, and if the asynchronous network RF sensitivity is equal to or greater than the reference value, a message for inquiring whether to switch to a video call to the called-side mobile communication terminal 200. (S205, S207).

Subsequently, when receiving a response message allowing the switch to the video call from the called mobile terminal 200, the called-side synchronization network switch 330 sends a redirection message to the called mobile terminal 200 In step S209, the mobile station transmits a request message to reconnect to the video call call to the calling-side asynchronous network switch 230.

The originating asynchronous network switch 230 requests and receives routing information from the home location register 250, checks whether the called mobile terminal 200 has transitioned to the asynchronous network switch, and transitions to the asynchronous network switch. In this case, it attempts to connect with the called party's asynchronous network switch 430 to establish a video call call, and disconnects from the previous called party's network switch connected with the voice call (S211).

On the other hand, when the asynchronous network RF sensitivity is less than the reference value as a result of step S205, the called-side synchronization network switch 330 performs the operation after step S201.

On the other hand, when the called party does not allow the switch to the video call as a result of step S207, the called party synchronization network switch 330 continues to maintain the voice call connection.

In the video call automatic transition method disclosed in FIG. 6, when the calling mobile communication terminal 100 and the called mobile communication terminal 200 are in a voice call, the called-side synchronization network exchanger 330 receives the called-side mobile communication terminal 200. In addition to periodically checking the asynchronous network RF sensitivity of), the called party wants to make a video call during the procedure of FIG. 5, but after the voice call connection is performed because the asynchronous network RF sensitivity is less than the reference value, the called party The synchronous network switch 330 may also be applied to periodically check the asynchronous network RF sensitivity of the called-party mobile communication terminal 200.

As such, those skilled in the art will appreciate that the present invention can be implemented in other specific forms without changing the technical spirit or essential features thereof. Therefore, the above-described embodiments are to be understood as illustrative in all respects and not as restrictive. The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

As described above, the method for providing the automatic video call transition function of the present invention and the mobile communication system for the same when the other party's mobile communication terminal is connected to the synchronization network switch when the video call is made, the video call is impossible, Since a video call permission query message is transmitted to the mobile communication terminal connected to the synchronous network exchange to switch to an asynchronous network, it is suitable for a high necessity to perform a video call with the mobile communication terminal connected to the synchronous network exchange.

1 is a view showing an example of the configuration of a mobile communication system according to the present invention;

2 is a diagram showing another example of a mobile communication system configuration according to the present invention;

3 is a view showing the configuration of an asynchronous network switch according to the present invention;

4 is a diagram showing the configuration of a synchronous network exchange according to the present invention;

5 is a flowchart illustrating an example of a method for automatically transitioning a video call according to the present invention;

6 is a flowchart illustrating another example of an automatic video call transition method according to the present invention.

100, 200: mobile communication terminal 230, 430: asynchronous network switch

231: check whether the video call possible 233: transition request unit

235, 337: call connection processing unit 250: home location register

330: synchronous network exchange 331: asynchronous network status information request unit

333: Determining whether the video call is possible 335: Resetting request unit

510, 570: data service node 530: HSS

550: Synchronous network data service node

Claims

As a method for providing a video call automatic transition function,

a) requesting and receiving routing information to a home location register when the calling asynchronous network switch receives the video call request message transmitted from the calling mobile terminal;

b) checking, by the calling asynchronous network switch, the routing information received from the home location register to determine whether the called mobile terminal is roamed to the asynchronous network switch to enable a video call call connection;

c) as a result of step b), when the called mobile communication terminal roams to the synchronous network switch, the calling asynchronous network switch transmits a video call request message to the called mobile communication terminal through the called-side synchronization network switch. step;

d) in response to receiving a video call permission response message from the called mobile terminal, requesting asynchronous network RF sensitivity information from the called mobile terminal to the called mobile terminal;

e) a redirection message is sent to the called-party mobile terminal when the asynchronous network RF sensitivity is higher than the reference value by comparing the asynchronous network RF sensitivity information received from the called-party mobile terminal with the preset reference value. Transmitting a request message for reconnecting to a video call call to an originating asynchronous network switch; And

f) when the calling asynchronous network exchange receives a request message to reconnect to the video calling call from the called synchronous network switch, attempting to connect with the called asynchronous network exchange to establish a video call call;

Method for providing a video call auto transition function comprising a.

The method of claim 1,

C),

When the calling asynchronous network exchange sends an active transition request message for a video call to the called synchronous network exchange, the called synchronous network exchange sends a video call request query message (video call request message) to the called mobile communication terminal. And providing a video call auto transition function.

The method of claim 1,

F) step,

f-1) receiving, by the calling asynchronous network exchange, a request message to reconnect to the video call call from the called synchronous network switch;

f-2) the originating asynchronous network switch requesting and receiving routing information from the home location register to confirm whether the called mobile terminal has transitioned to the asynchronous network switch; And

f-3) When the called mobile communication terminal transitions to an asynchronous network exchange, the calling asynchronous network exchange attempts to connect with the called asynchronous network switch, establishes a video call call, and synchronizes the previous called party that is connecting the voice call. Disconnecting from the network switch;

Method for providing a video call auto transition function comprising a.

The method of claim 3,

As a result of checking in f-2), when the called-party mobile communication terminal does not transition to the asynchronous network switch, the calling-side asynchronous network switch transmits a voice call connection request message to the called-side sync network switch to perform a voice call connection. Doing;

Method for providing a video call auto transition function further comprising a.

The method of claim 4, wherein

After the voice call connection, the called-side sync network switch checks the asynchronous network RF sensitivity of the called-side mobile communication terminal, and if the asynchronous network RF sensitivity is equal to or greater than the reference value, inquires whether to switch to the video call with the called-side mobile communication terminal. Transmitting a message to say;

a) requesting and receiving an asynchronous network RF sensitivity from the called-side mobile communication terminal to the called-side mobile communication terminal every predetermined period when a voice call is connected between the calling mobile terminal and the called mobile terminal;

b) when the called-side synchronous network switch compares the asynchronous network RF sensitivity with a preset reference value, and transmits a message to the called-party mobile communication terminal to inquire whether to switch to a video call when the asynchronous network RF sensitivity is higher than the reference value. step;

c) when a response message is received from the called mobile communication terminal to allow a switch to a video call, the called synchronization network switch sends a redirection message to the called mobile communication terminal, and then to the calling asynchronous network switch. Sending a request message to reconnect to a video call call;

d) the originating asynchronous network switch requesting and receiving routing information from the home location register to confirm whether the called mobile terminal has transitioned to the asynchronous network switch; And

e) If the called mobile communication terminal transitions to an asynchronous network switch, the calling asynchronous network exchange attempts to connect with the called asynchronous network switch, establishes a video call call, and connects the previous called synchronous network switch that is connecting the voice call. Disconnecting with;

Method for providing a video call auto transition function comprising a.

A mobile communication system for providing a video call automatic transition function,

Upon receiving the video call request message transmitted from the calling mobile terminal, request and receive routing information from the home location register to check whether the roaming exchange terminal is the asynchronous network switch. An asynchronous network switch, when not roaming, transmitting a transition request message requesting a switch to a video call to the called-side synchronization network switch; And

When the transition request message is received from the calling asynchronous network exchange, the video communication permission query message confirming whether to switch to the video call is transmitted to the called mobile terminal, and the transfer is allowed from the called mobile terminal. When receiving a response to the request, if the requesting and receiving asynchronous network RF sensitivity information to the receiving mobile communication terminal, if the asynchronous network RF sensitivity is more than a predetermined reference value, and sends a redirection message to the receiving mobile communication terminal, asynchronous A synchronization network switch requesting a video call call connection to the network switch;

Mobile communication system for providing a video call automatic transition function comprising a.

Upon receiving the video call request message transmitted from the calling mobile terminal, the mobile terminal requests and receives routing information from the home location register to check whether the roaming exchange terminal is the asynchronous network switch. Video call availability check unit for checking whether or not the state is possible;

A transition request unit for transmitting a transition request message for a video call to a called-side sync network switch when the called-party mobile communication terminal is not roamed to the asynchronous network switch as a result of checking the video call availability check unit; And

A call connection processor that performs a procedure related to call connection;

An asynchronous network switch for providing a video call automatic transition function comprising a.

When the transition request message is received from the calling asynchronous network switch, a video call permission query message is transmitted to the called mobile terminal, which is roaming with the synchronous network switch, to confirm whether to switch to the video call, and from the called mobile terminal. An asynchronous network state information request unit for requesting and receiving asynchronous network RF sensitivity information from a called-party mobile terminal upon receiving a response to allow a switch to a video call;

Whether or not a video call is determined by the called mobile communication terminal to be able to make a video call when the asynchronous network RF sensitivity information received from the called mobile communication terminal is compared with a preset reference value and the asynchronous network RF sensitivity is equal to or larger than a preset reference value. Determination unit;

A reset request unit for transmitting a redirection message for requesting a switch to a video call to a called-party mobile communication terminal capable of making a video call; And

A call connection processing unit that performs a call connection procedure including a procedure for requesting a video call call connection to an asynchronous network switch when the reset request unit transmits a reset message to a called-party mobile communication terminal;

Synchronous network switch for providing a video call automatic transition function comprising a.

Upon receiving the video call request message transmitted from the calling mobile terminal, request and receive routing information from the subscriber information management server to check whether the data service node roaming by the called mobile terminal is a synchronous network data service node. A data service node that transmits a transition request message for requesting a switch to a video call to the called party's synchronization network data service node when roaming to the synchronization network data service node; And

When a transition request message is received from the calling party data service node, a video call permission query message for confirming whether to switch to a video call is transmitted to the called party's mobile terminal, and the call is allowed to switch to the video call. When receiving a response to the request, if the requesting and receiving asynchronous network RF sensitivity information to the receiving mobile communication terminal, if the asynchronous network RF sensitivity is more than a predetermined reference value, and sends a redirection message to the receiving mobile communication terminal, the data A synchronization network data service node requesting a video call call connection to a service node;

When the video call request message transmitted from the calling mobile terminal is received, routing information is requested and received from the subscriber information management server, and the data service node roaming the called mobile terminal is connected to the data service node capable of video call. Video call check whether to check whether or not;

A transition request unit for transmitting a transition request message for a video call to the called-side synchronization network data service node when the called-party mobile communication terminal roams to the synchronous network data service node as a result of confirming whether the video call is possible; And

Data service node for providing a video call automatic transition function comprising a.

When the transition request message is received from the calling party data service node, a video call permission query message for confirming whether to switch to the video call is transmitted to the called party mobile terminal roaming with the synchronous network data service node. An asynchronous network state information request unit for requesting and receiving asynchronous network RF sensitivity information from the terminal when receiving a response to allow a switch to a video call;

Whether or not a video call is determined by the called mobile communication terminal to be able to make a video call when the asynchronous network RF sensitivity information received from the called mobile communication terminal is compared with a preset reference value and the asynchronous network RF sensitivity is equal to or larger than a preset reference value. Judgment unit;

A call connection processor configured to perform a call connection procedure including a procedure for requesting a video call call connection to a data service node when the reset request unit transmits a reset message to a called-party mobile communication terminal;

Synchronous network data service node for providing a video call automatic transition function comprising a.