KR20100011778A - Method and apparatus for controlling video call of mobile terminal - Google Patents

Abstract

PURPOSE: A method and an apparatus for controlling video call handover of a mobile communication terminal are provided to control a video call to be blocked according to setting of a video call blocking function, thereby preventing leakage of confidential facts due to carelessness. CONSTITUTION: A wireless link setup request is transmitted from an SRNC(Serving Radio Network Controller)(600). It is determined whether a call kind of a handover request terminal is a video call(602). The terminal determines setting of a video call blocking function in the second base station(604). If the video call blocking function is set in the second base station, a wireless link setting failure message is transmitted to the SRNC(606). A wireless link setup response is transmitted to the SRNC(608). The SRNC commands handover execution to the terminal(610).

Description

METHOD AND APPARATUS FOR CONTROLLING VIDEO CALL OF MOBILE TERMINAL}

The present invention relates to a method and an apparatus for controlling a video call handover of a mobile communication terminal. More particularly, the present invention relates to a handover of a mobile station when a terminal having a call set up within a first base station area moves to a second base station area. It relates to a method and an apparatus for controlling.

With the rapid development of communication technology, various wireless communication services using a wireless communication network have been provided. In particular, the mobile communication service has evolved over several generations, and recently, a third generation mobile communication service using a wideband code division multiple access (WCDMA) network has been provided. One of the characteristics of the 3G mobile communication service is a video call service. Video call service is a service that allows users to exchange video and audio with each other and make a call simultaneously.When the caller's mobile terminal transmits a video / audio signal to the receiver, the receiver sends the video / audio signal transmitted by the caller It is a method of viewing and listening to a caller's call by receiving from a mobile communication terminal.

Recently, as the number of video call service subscribers has increased, the issue of information leakage by video calls has emerged as a hot topic. If a user with a terminal with video call service uses the video call service in a company's research institute or government agency where security is required, corporate secrets or state secrets are leaked due to intentional or negligence of the user. This can happen. In order to prevent such a situation, it is possible to consider a method of blocking a video call when a terminal user enters this area by setting a specific area requiring security maintenance as a video call blocking area.

However, the existing video call blocking method may be implemented only for a specific terminal having a function of blocking a camera function by receiving a specific indicator from a mobile communication system. In the past, when the terminal enters the video call blocking area, the mobile communication system transmits a specific indicator to the terminal, and the terminal receiving the specific indicator uses a method of restricting the video call by blocking its camera function. to be.

One of the problems that occurs when using a video call blocking method that depends on the terminal is a handover problem of a video call that is being connected. If a user of a terminal performing a video call is set up in an area where the video call blocking function is not set, the user of the terminal performing the video call moves to an area where the video call blocking function is required to maintain security. If the blocking function is not provided, the handover will be performed as it is by the mobile communication system. In this case, there is no way to prevent the user from making a video call even though the video call blocking function is set. Therefore, in order to solve this problem, a video call blocking function through a handover control method that is independent of the terminal is required to block the video call without distinguishing the type of the terminal.

Therefore, in the present invention, when a user of a terminal performing a video call is set up in an area where the video call blocking function is not set, and the user enters an area where the video call blocking function is set because security is required, the video call of the terminal is performed. It is an object of the present invention to provide a method and apparatus capable of preventing a leak of intentional or inadvertent leakage by blocking.

The present invention also provides a method and apparatus for blocking video calls without distinguishing the type of terminal when the terminal enters an area where the video call blocking function is set by controlling the video call handover in the system without being dependent on the terminal. For other purposes.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention, which are not mentioned above, can be understood by the following description, and more clearly by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

In order to achieve the above object, the present invention provides a method for controlling a handover of a terminal when a terminal having a call set up within a first base station area moves to a second base station area, and receives a handover request message of the terminal. Making; Determining a call type of the terminal; Determining whether to set the video call blocking function of the second base station; And blocking the video call handover of the terminal when the call type is the video call and the video call blocking function is set as the result of the call type determination of the terminal. It is characterized by doing.

In addition, the present invention provides a device for controlling the handover of the terminal when a terminal set up a call in the first base station area to the second base station area, the handover request message of the terminal and receives a response message Message transmitting and receiving unit; A call type determination unit for determining a call type of the terminal; A cutoff function setting determination unit determining whether to set the video call blocking function of the second base station; And a handover control unit for blocking a video call handover of the terminal when the call type is a video call and the video call blocking function is set in the second base station. It is another feature to include.

The present invention also provides a method for controlling a handover of a terminal when a terminal having a call set up in a first base station area moves to a second base station area, the method comprising: receiving a handover request message from the terminal; Determining whether to set a video call blocking function of the second base station; And blocking the handover of the terminal when the video call blocking function is set in the second base station and the call type of the terminal is a video call. And E, wherein the second base station is controlled by the same base station controller.

The present invention also relates to a method of controlling a handover of a terminal when a terminal having a call set up in a first base station area controlled by a first base station controller moves to a second base station area controlled by a second base station controller. Receiving a handover request message of the terminal from the first base station controller; Determining a call type of the terminal; Determining whether to set the video call blocking function of the second base station; And blocking the video call handover of the terminal when the call type is the video call and the video call blocking function is set as the result of the call type determination of the terminal. It is another feature to do.

According to the configuration of the present invention as described above, the video call is set in the area where the video call blocking function is not set to enter the area where the video call blocking function is set because the user of the terminal performing the video call needs to maintain security. In this case, by blocking a video call of the terminal, it is possible to prevent leakage of confidentiality due to intentional or carelessness.

In addition, the present invention is not dependent on the terminal, and by controlling the video call handover in the system, when the terminal enters the area where the video call blocking function is set, there is an effect that the video call can be blocked without distinguishing the type of the terminal.

The above objects, features, and advantages will be described in detail with reference to the accompanying drawings, whereby those skilled in the art to which the present invention pertains may easily implement the technical idea of the present invention. In describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

In the present invention, the mobile communication terminal includes a terminal that enables wireless communication while being carried by an individual, such as a personal mobile communication terminal (PCS), a personal digital terminal (PDA), a smartphone, and a next generation mobile communication terminal (IMT-2000).

The present invention first receives a handover request message of a terminal when a terminal having a call set up in the first base station area moves to a second base station area. Then, it is determined whether the call type of the terminal and the video call blocking function of the second base station are set. If the call type of the terminal is a video call and the video call blocking function is set in the second base station, the video call handover of the terminal is blocked.

In the embodiment of the present invention, intra RNS handover means handover when the first base station and the second base station are controlled by the same base station controller. In addition, Inter RNS Handover refers to handover when the first base station and the second base station are controlled by different base station controllers.

Here, the handover request message may appear differently according to an embodiment. If the first base station and the second base station are controlled by the same base station controller, the handover request message may be a measurement report message from the terminal. If the first base station and the second base station are controlled by different base station controllers, the handover request message may be a radio link establishment request message from the base station controller controlling the first base station.

The call type of the terminal may be determined as whether or not this field satisfies a predetermined condition by referring to a specific field indicating the call type of the terminal currently set among various fields included in the handover request message. If the first base station and the second base station are controlled by the same base station controller, the base station controller may call the call through the signal sent by the terminal in a state of communicating with the terminal before performing the handover control method according to the present invention. I can see the kind.

There may be various methods for determining whether the video call blocking function of the second base station is set. For example, a database is stored in which each base station manages whether to set a video call blocking function for each cell managed by the base station, and the second base station determines whether the video call blocking function is set by referring to the database included in the second base station. You will be able to judge. However, the method of determining whether to set the video call blocking function is not limited thereto.

The call type determination of the terminal and the determination of whether to set the video call blocking function of the second base station need not be made in a certain order. That is, the call type determination of the terminal may be performed first, the determination of whether to set the video call blocking function of the second base station may be performed first, or both determinations may occur simultaneously. In the handover control method according to the present invention, since the call type of the terminal is a video call and the video call blocking function is set in the second base station, the video call of the terminal is blocked.

If both of the above conditions are satisfied, handover of the video call requested by the terminal is blocked. Video call handover blocking may be performed by transmitting a radio link establishment failure message to the first base station controller, but is not limited thereto.

In this way, when a terminal having a video call enters a region where a video call blocking function is set in an area where the video call blocking function is not set, the video call can be blocked regardless of whether the terminal supports the video call blocking function. It will be described in detail with the following examples.

1 is a block diagram showing a network configuration when intra RNS handover occurs according to an embodiment of the present invention. Referring to FIG. 1, a Mobile Switching Center (MSC) 100 is an automatic system that configures access points for user traffic between a mobile communication network and a general telephone network, or other mobile switching centers in the same or different mobile communication networks. Base station controllers can be managed. However, in FIG. 1, it is shown that one base station controller 102 is managed for convenience.

A base station controller (RNC) 102 controls a plurality of base stations, and when a user selects a packet service such as the Internet or an intranet as the terminal 112, a SGSN (Serving GPRS Support Node) and an Iu. When the user selects the circuit service, the user connects to the main exchange so that the user can talk to other public networks (PLMN, PSDN) or the terminal of the receiver.

The base station (Node B) (104, 106) receives the information transmitted from the physical layer of the user equipment (UE) (112), the access point of the terminal 112 for transmitting data to the terminal 112 (Access Point ) Plays a role.

In FIG. 1, both the first base station 104 and the second base station 106 are controlled by the same base station controller 102. In addition, the terminal 112 is in a state in which a call is set up by the first base station in the cell 108 area managed by the first base station 104, and in this state, the cell 110 area is managed by the second base station 106. Is moving to. As mentioned above, the handover that occurs in this case is referred to as intra RNS handover.

2 is a flowchart illustrating a process of performing a general intra RNS handover.

When a handover is required in the situation as shown in FIG. 1, the base station controller 102 uses parameters such as a reporting range for determining handover by using a Radio Resource Control (RRC) message. The hysteresis, a time trigger, and the like are transmitted to the terminal 112. After receiving the RRC message, the terminal 112 measures a measurement quantity of the cell to which the cell is currently connected and the cell to be handed over, and then determines the handover using the aforementioned parameters. That is, the terminal 112 adds a cell if the difference in the measured quantity of the best cell among the cells to be handed over with the currently connected cell is smaller than (reporting range-hysteresis), and attempts to hand over to the currently connected cell. If the measurable difference between the worst cells is greater than hysteresis, the cell is replaced. In addition, if the difference in the measured quantity between the cell that is currently connected and the best cell among the cells to be handed over is greater than (reporting range + hysteresis), the cell is removed.

 The RRC layer (hereinafter referred to as RRC) of the terminal 112 analyzes the measured amount measured in the physical layer and checks whether the measured amount satisfies the event condition for handover. If the result of the check satisfies the above event conditions, the RRC of the terminal 112 requests transmission of a measurement report (MR) message to a radio link control (RLC) layer (hereinafter referred to as RLC). The RLC, which is requested to transmit the measurement report message, transmits the measurement report message to the base station controller 102 (200).

When the measurement report message is received, the base station controller 102 transmits a response signal RLC_ACK indicating that the measurement report message is normally received and then analyzes the measurement report message. As a result of the analysis, if it is determined that the conditions for handover are normally accepted, the base station controller 102 establishes a radio link with the base station 106 managing the cell to be handed over (202), and uses the RLC of the terminal 112. Handover processing is initiated by sending an Active Set Update message, which is a kind of handover approval message. The RRC processes the active set update input through the RLC to perform a handover. When the radio link (RL) setting of the terminal 112 is adjusted (added or deleted) through the handover, the RRC sets the active set to the RLC. Request to send an Active Set Update complete message. The RLC sends an active set update complete message to the base station controller 102 at the request of the RRC (206).

3 is a flowchart illustrating a procedure of performing intra RNS handover according to an embodiment of the present invention.

First, a measurement report is transmitted from a terminal to handover from a first base station to a second base station (300). As mentioned above, the measurement report is a kind of message requesting a handover, but is not necessarily limited thereto. Meanwhile, in an embodiment of the present invention, since the terminal is transmitting and receiving a signal with the first base station and the first base station and the base station controller are also transmitting and receiving signals, it is possible to determine whether the call type of the terminal is a video call or not through this signal. .

Upon receiving the measurement report, the terminal determines whether the base station to which the terminal is to be handed over, that is, the second base station, has set the video call blocking function (302). For example, a database is stored in which each base station manages whether to set a video call blocking function for each cell managed by the base station, and the second base station determines whether the video call blocking function is set by referring to the database included in the second base station. Can be determined. However, the method of determining whether to set the video call blocking function is not limited thereto.

As a result of determining whether the video call blocking function is set, if the video call blocking function is not set in the second base station, this means that it is not necessary to block the video call, thereby giving a normal handover command to the terminal (304). If the video call blocking function is set, this means that the video call should be blocked, so the terminal terminates without giving a handover command to the terminal.

4 is a diagram illustrating a network configuration when an inter RNS handover occurs according to another embodiment of the present invention.

In FIG. 4, unlike in FIG. 1, a base station controller controlling the first base station 406 and the second base station 408 is different. The base station controller 402 currently connected to the terminal 414 through the first base station 406 is called a serving radio network controller (SRNC). The SRNC 402 serves as a second layer of Open System Interface (OSI) for data coming in through the air interface or transmitted to the terminal 414, and allocates radio resources suitable for providing related services. The radio resource management function of the SRNC 402 includes all control functions related to the terminal 414 such as transmission channel setting, handover decision, and power control.

When the terminal 414 is moved, the terminal 414 is connected to the SRNC 402 via the base station controller of the moved area. At this time, the base station controller 404 in the area where the terminal 414 is moved is called a target base station controller (DRNC). Thus, the management of the terminal 414 and the access point role of the main exchange 400 are still performed in the SRNC 402, and the DRNC 404 simply performs a partial function of routing user data or allocating codes that are public resources. do. One terminal 414 may not have a DRNC 404 or may have one or several DRNC 404s depending on the connection state.

In FIG. 4, the terminal 414 is in a state where call setup is made by the first base station in a region of the cell 410 managed by the first base station 406, and in this state, the cell managed by the second base station 408 ( 412) it is moving to the area. As mentioned above, the handover that occurs in this case is referred to as inter RNS handover.

5 is a flowchart illustrating a process of performing a general inter RNS handover.

First, the SRNC 402 receives a measurement report from the terminal 414 (500). SRNC 402 then sends 502 a Radio Link Setup Request to DRNC 404 to request handover of terminal 414. The process of determining whether the DRNC 404 approves handover is similar to the process described with reference to FIG. 2, and thus a detailed description thereof will be omitted.

If it is determined that the handover is approved, the DRNC 404 transmits a radio link setup response to the SRNC 402 (504). Then, the SRNC 402 transmits an active set update to the terminal 414 to initiate a handover process (506). The terminal 414 processes the received active set update to perform a handover. When the radio link (RL) setting of the terminal 112 is normally adjusted (added or deleted), the active set update completion message is transmitted to the DRNC 404 (508), and the DRNC 404 is again the SRNC (402). In step 510, an active set update complete message is transmitted.

6 is a flowchart illustrating a process of performing inter RNS handover according to another embodiment of the present invention.

First, a terminal to handover from a first base station to a second base station will transmit a measurement report to the SRNC. Then, the radio link establishment request is transmitted from the SRNC which has received the measurement report (600). The radio link establishment request is a kind of message requesting a handover as mentioned above, but is not necessarily limited thereto.

Then, it is determined whether or not the call type of the terminal requesting the handover is an image call (602). If the call type of the terminal is not a video call, this means that the call is not a video call, and thus the handover may be performed regardless of whether or not the video call is blocked in the area where the terminal enters. If the call type of the terminal is a video call, it is determined whether or not to be blocked according to the video call blocking setting of the second base station.

One method of determining a call type of a terminal is to determine whether this field satisfies a predetermined condition by referring to a specific field indicating a call type of a terminal currently set among various fields included in the handover request message. . For example, when the "UL Channelization Code Length" field is 16 and the "DL DPCH Slot Format" field is 13 among various fields in the radio link establishment request message received from the SRNC, it indicates that the terminal is set to an image call. These conditions may vary depending on how the standard of the message transmitted and received between the terminal and the system is specified.

In the next step, it is determined whether the video call blocking function is set in the base station to be handed over, that is, the second base station (604). If the video call blocking function is set in the second base station, the handover of this terminal should be blocked. There may be several ways to block, but here, a radio link establishment failure message is sent to the SRNC (606).

If the video call blocking function is not set in the second base station, this means that there is no need to block the video call. That is, the radio link establishment response is transmitted to the SRNC (608), and the SRNC commands the terminal to perform handover (610).

As described above, in another embodiment of the present invention, it is only a preferred embodiment to first determine the call type of the terminal and then determine whether the video call blocking function is set in the base station to which the terminal is to be handed over. In another embodiment of the present invention, since the call type of the terminal is blocked only when both the condition that the video call and the condition that the video call blocking function is set in the base station to which the terminal is to be handed over are satisfied, The order of the call type determination of the terminal and the determination of whether the video call blocking function is set may be reversed or may occur at the same time.

7 is a structural diagram showing the structure of a handover control device of a terminal according to the present invention. The apparatus 700 for handover control of a terminal according to the present invention includes a message transmission / reception unit 702, a call type determination unit 704, a blocking function setting determination unit 706, and a handover control unit 708.

The message transmitting / receiving unit 702 includes a function of receiving a handover request message and transmitting a response message in addition to the function of transmitting and receiving a general signal transmitted and received by the terminal. The call type determination unit 704 determines the call type of the terminal requesting the handover. There may be various ways for the call type determination unit 704 to determine the call type of the terminal, one of which is included in the handover request message of the terminal received through the message transceiver 702 as described above. It refers to a specific field that indicates the type of call that was made.

The blocking function setting determining unit 706 determines whether to set the video call blocking function of the base station to which the terminal intends to handover. For example, create a database in which each base station sets the video call blocking function for each cell managed by the base station, and whether the video call blocking function is set by referring to this database included in the base station to be handed over by the terminal. Can be determined.

The handover control unit 708 determines the video call handover of the terminal when the call type is determined to be the video call and the video call blocking function is set to the base station to which the terminal is to be handed over. It serves to block.

According to the present invention, when a user of a terminal performing a video call is set up in an area where the video call blocking function is not set and enters a region where the video call blocking function is set because security is required, the image of the terminal is set. Blocking a call has the effect of preventing the leakage of confidential or inadvertent confidentiality.

In addition, according to the present invention, when the terminal enters the area where the video call blocking function is set by controlling the video call handover in the system without being dependent on the terminal, the video call can be blocked without distinguishing the type of the terminal.

The method of the present invention as described above can be written in a computer program. And the code and code segments constituting the program can be easily inferred by a computer programmer in the art. In addition, the written program is stored in a computer-readable recording medium (information storage medium), and read and executed by a computer to implement the method of the present invention. The recording medium includes all types of computer-readable recording media (tangible media such as CD and DVD as well as intangible media such as carrier waves).

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by.

1 is a block diagram showing a network configuration when intra RNS handover occurs according to an embodiment of the present invention.

2 is a flowchart illustrating a process of performing a general intra RNS handover.

3 is a flowchart illustrating a process of performing intra RNS handover according to an embodiment of the present invention.

4 is a diagram illustrating a network configuration when an inter RNS handover occurs according to another embodiment of the present invention.

5 is a flowchart illustrating a process of performing a general inter RNS handover.

6 is a flowchart illustrating a process of performing inter RNS handover according to another embodiment of the present invention.

7 is a structural diagram showing a structure of a handover control device of a terminal according to the present invention;

Claims (13)

A method for controlling handover of a terminal when a terminal having a call set up in a first base station area moves to a second base station area, Receiving a handover request message of the terminal; Determining a call type of the terminal; Determining whether to set the video call blocking function of the second base station; And Blocking the video call handover of the terminal when the call type is the video call and the video call blocking function is set as the result of the call type determination of the terminal. Handover control method of a terminal comprising a. The method of claim 1, The handover request message is And a measurement report message from the terminal. The method of claim 1, The handover request message is And a radio link establishment request message from a base station controller controlling the first base station. The method of claim 1, Determining the call type of the terminal And determining whether a field value indicating a call type of the terminal included in the handover request message satisfies a predetermined condition. The method of claim 1, Determining the call type of the terminal And performing the video call blocking function in the second base station as a result of determining whether to set the video call blocking function. The method of claim 1, The step of determining whether to set the video call blocking function And performing a reference to a video call blocking function setting database for each cell included in the second base station. The method of claim 1, The step of determining whether to set the video call blocking function And performing the call type determination only when the call type is an image call. The method of claim 1, Blocking the video call handover And performing a radio link establishment failure message to the first base station controller. An apparatus for controlling handover of a terminal when a terminal having a call set up in a first base station region moves to a second base station region, A message transmitting / receiving unit which receives a handover request message of the terminal and transmits a response message thereto; A call type determination unit for determining a call type of the terminal; A cutoff function setting determination unit determining whether to set the video call blocking function of the second base station; And A handover controller for blocking a video call handover of the terminal when the call type is a video call and the video call blocking function is set in the second base station Handover control device of a terminal comprising a. The method of claim 9, The call type determination unit And the call type is determined by determining whether a field value indicating a call type of the terminal included in the handover request message satisfies a predetermined condition. The method of claim 9, The cutoff function setting determination unit And determining whether to set the blocking function by referring to a video call blocking function setting database for each cell included in the second base station. A method for controlling handover of a terminal when a terminal having a call set up in a first base station area moves to a second base station area, Receiving a handover request message from the terminal; Determining whether to set a video call blocking function of the second base station; And Blocking handover of the terminal when the video call blocking function is set in the second base station and the call type of the terminal is a video call; And the first base station and the second base station are controlled by the same base station controller. A method for controlling handover of a terminal when a terminal having a call set up in a first base station area controlled by a first base station controller moves to a second base station area controlled by a second base station controller, Receiving a handover request message of the terminal from the first base station controller; Determining a call type of the terminal; Determining whether to set the video call blocking function of the second base station; And Blocking the video call handover of the terminal when the call type is the video call and the video call blocking function is set as the result of the call type determination of the terminal. Handover control method of a terminal comprising a.

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