KR101478839B1 - Method and apparatus for controlling video call of mobile terminal - Google Patents

Abstract

The present invention relates to a method and apparatus for controlling a handover of a terminal when a call is set in a first base station area to a second base station area. In this regard, a method for controlling a handover of a mobile station when a call set in a first base station area moves to a second base station area includes receiving a handover request message of the mobile station; Determining a call type of the terminal; Determining whether to set a mutual blocking function of the second base station; And blocking the mutual handover of the terminal if the call type is determined as a result of the call type judgment of the terminal and the call blocking function is set to the second base station as a result of determining whether the call blocking function is set . According to the present invention, in a case where a video call is set in an area in which a video call blocking function is not set and a user who is performing a video call enters an area where the video call blocking function is set, It is possible to prevent leakage of the airtightness due to the airtightness.

Mobile communication, terminal, video call, video call, conversation, handover

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for controlling hand-

The present invention relates to a method and apparatus for controlling handover of a mobile communication terminal, and more particularly, to a method and apparatus for handover of a handover of a mobile communication terminal, And more particularly to a method and an apparatus for controlling the same.

2. Description of the Related Art [0002] With the rapid development of communication technology, various wireless communication services using a wireless communication network have been provided. In particular, mobile communication services have evolved through several generations. Recently, 3G mobile communication services using a WCDMA (Wideband Code Division Multiple Access) network have been provided. One of the features of the 3G mobile communication service is a video call service. The video call service is a service for transmitting and receiving images and voice to / from each other at the same time. When a video / audio signal is transmitted from a sender's mobile terminal to a receiver, the receiver transmits a video / The mobile communication terminal receives and watches the caller's call content.

In recent years, the problem of information leakage due to video calls has been raised as the number of subscribers for video call service increases. When a user having a terminal provided with a video call service uses a video call service in an area such as a research institute or a government agency where security maintenance is required, a secret of enterprise or a secret of the state is leaked due to carelessness or user's carelessness This is because a situation may occur. In order to prevent such a situation, it is possible to consider a method of blocking a video call when a terminal user enters into the area by setting a specific area requiring security maintenance as a mutual block area.

However, the existing video call blocking method can be implemented only in a specific terminal having a function of receiving a specific indicator from the mobile communication system and blocking the camera function. In the prior art, when a terminal enters a blocking area, a specific indicator is transmitted to the terminal in the mobile communication system, and the terminal receiving the specific indicator uses a method of limiting the calling terminal by blocking its camera function to be.

One of the problems that arise when using the mutual interception method depending on the terminal is the handover problem of the mutual mutual connection. If it is assumed that a video call is set up in an area where a video mutual blocking function is not set and a user of the terminal performing video communication moves to an area where the mutual blocking function is required to be kept secure, 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 mutual block function is set. Accordingly, in order to solve such a problem, a mutual blocking function through an unauthorized handover control method is required in order to block an unauthenticated terminal without distinguishing the types of terminals.

Accordingly, in the present invention, when a user of a terminal performing a video call with a video call set in an area in which a video call blocking function is not set enters a region in which a video call blocking function is set due to security maintenance, The object of the present invention is to provide a method and an apparatus capable of preventing air leakage due to deliberate or carelessness by blocking.

In addition, the present invention provides a method and apparatus for blocking a call connection without distinguishing the type of a terminal when the terminal enters the area where the call blocking function is set by controlling the call handover in the system without depending 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 can be understood by the following description and more clearly understood by the embodiments of the present invention. It will also be readily apparent that the objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

According to another aspect of the present invention, there is provided a method for controlling a handover of a terminal when a mobile station in a first base station moves to a second base station, the method comprising: ; Determining a call type of the terminal; Determining whether to set a mutual interception function of the second base station; And blocking the mutual handover of the terminal if the call type is determined as a result of the call type determination of the terminal and if the mutual block function is set to the second base station as a result of determining whether the mutual block function is set Wherein the step of determining a call type of the terminal determines whether the value of a field indicating a call type of the terminal included in the handover request message satisfies a predetermined condition and determines the call type.

In addition, the present invention provides an apparatus for controlling a handover of a terminal when a call set in a first base station area moves to a second base station area, the apparatus comprising: A message transmission / reception unit for transmitting a response message to the message; A call type determination unit for determining a call type of the terminal; A blocking function setting determining unit for determining whether to set a mutual blocking function of the second base station; And a handover control unit for blocking the mutual handover of the UE if the call type is set as a result of the call type determination of the UE and if the mutual block function is set to the second BS, The call type determination unit determines whether the call type of the terminal included in the handover request message satisfies a predetermined condition.

According to another aspect of the present invention, there is provided a method for controlling a handover of a terminal when a call is established in a first base station, the method comprising: receiving a handover request message from the terminal; Determining whether to set a mutual interception function of the second base station; And blocking the handover of the terminal when the call blocking function is set to the second base station and the call type of the terminal is a picture call, And the second base station are controlled by the same base station controller, and wherein the step of determining whether to set up the mutual block function comprises determining whether to set the block function by referring to each cell mutual interception function setting database included in the second base station .

The present invention also provides a method for controlling a handover of a terminal when a terminal having a call set in a first base station controlled by a first base station controller moves to a second base station 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 a mutual interception function of the second base station; And blocking the mutual handover of the terminal if the call type is determined as a result of the call type determination of the terminal and if the mutual block function is set to the second base station as a result of determining whether the mutual block function is set Wherein the step of determining a call type of the terminal determines whether the value of a field indicating a call type of the terminal included in the handover request message satisfies a predetermined condition and determines the call type.

According to the configuration of the present invention as described above, a user of a terminal performing a video call with a video call set in an area where the video mutual blocking function is not set enters a region where the video mutual blocking function is set because security is required It is possible to prevent confidential leakage due to intentional or carelessness by blocking the video call of the terminal.

In addition, the present invention is not dependent on a terminal and controls a mutual handover in a system, so that when a terminal enters an area where a mutual interception function is set, the intercept can be blocked without discriminating the type of the terminal.

The above and other objects, features, and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings, which are not intended to limit the scope of the present invention. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, preferred 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 denote the same or similar elements.

In the present invention, a mobile communication terminal includes a terminal capable of performing wireless communication while being carried by a person, such as a personal digital assistant (PCS), a personal digital assistant (PDA), a smart phone, a next generation mobile communication terminal (IMT-2000)

The present invention receives a handover request message of a mobile station when a mobile station having a call set in the first base station area moves to a second base station area. Then, it is determined whether or not the call type of the terminal and the mutual interception function of the second base station are set. If it is determined that the call type of the terminal is a mutual connection and the second mutual interception function is set to the second base station, the mutual handover of the terminal is blocked.

In the embodiment of the present invention, Intra RNS Handover refers to handover when the first base station and the second base station are controlled by the same base station controller. In addition, the inter RNS handover refers to a handover in the case where the first base station and the second base station are controlled by different base station controllers.

Here, the handover request message may be different according to the embodiment. If the first and second base stations 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 setup request message from the base station controller controlling the first base station.

The call type of the terminal can be determined by referring to a specific field indicating the call type of the currently set terminal among the various fields included in the handover request message and judging whether this field satisfies a predetermined condition. If the first base station and the second base station are controlled by the same base station controller, the base station controller transmits a signal through the signal transmitted from the terminal in a state of exchanging signals with the terminal before performing the handover control method according to the present invention. The type can be known.

There are various methods for determining whether or not the mutual interception function of the second base station is set. For example, it is possible to create a database in which each cell managed by the base station is set to block the mutual block function for each base station, and by referring to the database included in the second base station, . However, the method of determining whether or not the mutual interception function is set is not limited to this.

It is not necessary that the determination of the call type of the terminal and the determination of whether to set the mutual interception function of the second base station is performed necessarily in a certain order. That is, the call type determination of the terminal may be performed first, the second base station may determine whether to set up the mutual interception function, or both the determination may occur simultaneously. In the handover control method according to the present invention, since the call type of the terminal is determined as a result of the above determination and the call blocking function is set to the second base station,

If both of the above conditions are satisfied, the handover of the caller name requested by the terminal is blocked. The mutual handover blocking may be performed by transmitting a radio link setup failure message to the first base station controller, but the present invention is not limited thereto.

In this way, when a terminal for which a video call is set up in an area where a call blocking function is not set enters the area where the call blocking function is set, the video call can be blocked regardless of whether the terminal supports the call blocking function. Hereinafter, examples will be described in detail.

1 is a configuration diagram illustrating a network configuration when an 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 for configuring an access point for user traffic between a mobile communication network and a general telephone network, another mobile switching center in the same or another mobile communication network, Lt; RTI ID = 0.0 > controller. ≪ / RTI > However, in FIG. 1, it is shown that one base station controller 102 is managed for convenience.

A Radio Network 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 a terminal 112, a Serving GPRS Support Node (SGSN) Interface, and when the user selects a circuit service, the PLMN or PSDN or PLMN or PSDN can be connected to the main exchanger.

The Node Bs 104 and 106 receive information transmitted from a physical layer of a user equipment (UE) 112 and transmit data to an access point ).

In FIG. 1, both the first base station 104 and the second base station 106 are controlled by the same base station controller 102. The terminal 112 is in a state where a call is established by the first base station in the cell 108 area managed by the first base station 104 and the cell 110 area managed by the second base station 106 . As mentioned above, the handover occurring in this case is referred to as intra RNS handover.

FIG. 2 is a flowchart illustrating a process in which a general intra RNS handover is performed.

1, the base station controller 102 transmits parameters required for a handover decision, for example, a reporting range using a radio resource control (RRC) message, Hysteresis, a time trigger, and the like to the terminal 112. Upon receiving the RRC message, the UE 112 measures a measurement quantity of a currently connected cell and a cell to be handed over, and then determines handover using the parameters described above. That is, if the measurement difference between the currently connected cell and the cell to be handed over is smaller than the measurement difference of the best cell (reporting range-hysteresis), the terminal 112 adds the cell and performs handover with the currently connected cell If the difference between the measured amount of the worst cell is larger than the hysteresis, the cell is replaced. Also, if the measured difference between the currently connected cell and the cell to be handed over is greater than (the reporting range + hysteresis), the cell is removed.

 The RRC layer (hereinafter referred to as RRC) of the terminal 112 analyzes a measured amount measured at the physical layer and checks whether the measured amount satisfies the event condition for handover. As a result of the check, if the above event condition is satisfied, 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 requesting the transmission of the measurement report message transmits a measurement report message to the base station controller 102 (step 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 has been normally received to the RLC and analyzes the measurement report message. The base station controller 102 establishes a radio link with a base station 106 that manages a cell to be handed over and then transmits a radio link to the RLC of the terminal 112 And transmits an active set update message, which is a kind of handover grant message, to start handover processing. The RRC processes the active set update inputted through the RLC to perform a handover. When the radio link (RL) setting of the terminal 112 is normally adjusted (added or deleted) through the handover, the RRC sets the active set And requests transmission of 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 an intra RNS handover procedure according to an embodiment of the present invention.

First, a measurement report is received from a terminal to which a handover is to be performed from a first base station to a second base station (300). The measurement report is a kind of a message requesting handover as described above, but is not limited thereto. Meanwhile, in an embodiment of the present invention, since the terminal exchanges signals with the first base station, and the first base station and the base station controller also exchange signals, it is possible to determine whether the call type of the terminal is mutual .

Upon receipt of the measurement report, the base station determines whether the base station to which the mobile station desires to perform handover, that is, the second base station, has established a mutual blocking function (302). For example, it is possible to create a database in which each cell managed by the base station is set to block the mutual block function for each base station, and by referring to the database included in the second base station, Can be determined. However, the method of determining whether or not the mutual interception function is set is not limited to this.

If it is determined that the call blocking function is not set in the second base station, it means that there is no need to block the call terminal, so a normal handover command is issued to the terminal (304). If the mutual interception function is set, it means that the video call should be blocked, so it is terminated without issuing a handover execution command to the terminal.

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

In FIG. 4, the first base station 406 and the base station controller controlling the second base station 408 differ from each other in FIG. The base station controller 402 connected to the current terminal 414 through the first base station 406 is referred to as a Serving Radio Network Controller (SRNC). The SRNC 402 functions as a second layer of OSI (Open System Interface) for data coming in via 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, power control, and the like.

When the terminal 414 moves, the terminal 414 is connected to the SRNC 402 via the base station controller in the area where the terminal 414 has moved. At this time, the base station controller 404 in the area where the mobile terminal 414 moves is referred to as a target base station controller (DRNC). Thus, the SRNC 402 still serves as a connection point between the management of the terminal 414 and the main exchanger 400, and the DRNC 404 simply performs a partial function of routing user data or assigning a code as a public resource do. One terminal 414 may not have the DRNC 404 or may have one or more DRNCs 404 depending on the connection status.

4, a terminal 414 is in a state where a call is established by a first base station in a cell 410 area managed by a first base station 406, and a cell 412) area. As mentioned above, the handover that occurs in this case is referred to as inter-RNS handover.

FIG. 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). Then, the SRNC 402 transmits a radio link setup request (502) to the DRNC 404 (502) and requests handover of the terminal 414. The process of determining whether or not the DRNC 404 approves handover is similar to the process described with reference to FIG. 2, so a detailed description will be omitted.

If 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 MS 414 to initiate a handover process (506). The MS 414 performs handover by processing the received active set update, (Adds or deletes) the radio link (RL) setting of the terminal 112 to the DRNC 404 through the SRNC 402. The DRNC 404 then transmits an active set update complete message to the DRNC 404 (508) (510) an active set update complete message.

6 is a flowchart illustrating an inter-RNS handover procedure according to another embodiment of the present invention.

First, a terminal desiring to perform a handover from a first base station to a second base station will transmit a measurement report to the SRNC. Then, the radio link setup request is received from the SRNC that has received the measurement report (600). The wireless link setup request is a kind of a message requesting handover as described above, but is not limited thereto.

Then, it is determined whether the call type of the terminal requesting the handover is a mutual name or not (602). If the call type of the terminal is not a video call, it means that the call is not a video call. Therefore, the handover is performed irrespective of whether the mutual block is set in the area where the terminal enters. If the call type of the terminal is mutual, it is determined whether the second base station is to be blocked or not, so the next step is to proceed.

One of the methods for determining a call type of a terminal is to refer to a specific field indicating a call type of a currently set terminal among a plurality of fields included in a handover request message to determine whether the field satisfies a predetermined condition . For example, if the "UL Channelization Code Length" field is 16 and the "DL DPCH Slot Format" field is 13 among the various fields in the radio link setup request message received from the SRNC, it indicates that the terminal is set as a video call. These conditions will depend on how the specifications of the messages transmitted and received between the terminal and the system are determined.

In the next step, it is determined whether a mutual interception function is set to a base station to which the mobile station desires to perform handover, that is, a second base station (step 604). If the second base station has a mutual block function, the handover of the second base station must be blocked. There are various methods of blocking, but in this case, a radio link setup failure message is transmitted to the SRNC (606).

If the second mutual interception function is not set in the second base station, it means that there is no need to intercept the mutual interconnection, so a normal handover can be performed. That is, the radio link setup response is transmitted to the SRNC (608), and the SRNC instructs the terminal to perform the handover (610).

As described above, in another embodiment of the present invention, it is only a preferred embodiment that the UE determines the call type of the terminal and determines whether the call blocking function is set in the base station to which the terminal wishes to perform handover. According to another embodiment of the present invention, only when the call type of the terminal is mutual and the condition that the mutual mutual block function is set to the base station to which the mobile station desires to hand over is blocked, The order of judging whether the call type of the terminal and the call blocking function are set may be changed or may occur at the same time.

FIG. 7 is a block diagram illustrating a structure of a handover control apparatus for a terminal according to the present invention. The handover control apparatus 700 of 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 transmission / reception unit 702 includes a function of receiving a handover request message and transmitting a response message thereto in addition to a general signal transmission / reception function to / from the terminal. The call type determination unit 704 determines the call type of the terminal requesting the handover. There are various methods for the call type determination unit 704 to determine the call type of the terminal. One of the methods may be one of the handover request message received through the message transmission and reception unit 702 It refers to a specific field indicating the type of call involved.

The blocking function setting determination unit 706 determines whether to set up the blocking function of the base station to which the terminal desires to perform handover. For example, a database is created for each base station to determine whether to set up a mutual block function for each cell managed by the base station, and whether the mutual block function is set by referring to the database included in the base station to which the terminal wishes to perform handover Can be determined.

If the call type of the terminal is determined as a result of the call type determination of the terminal and the call blocking function is set as a result of determining whether the call blocking function is set, the handover controller 708 determines whether the hand- It is a role to block.

According to the present invention, when a video call is set up in an area where the video mutual blocking function is not set and a user of the terminal performing the video communication needs to maintain the security and enters the area where the mutual blocking function is set, It is possible to prevent confidential leakage due to intentional or carelessness by blocking the call.

In addition, according to the present invention, when the terminal enters the area where the mutual interception function is set by controlling the mutual handover in the system without depending on the terminal, it is possible to block the mutual interference 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 deduced by a computer programmer in the field. In addition, the created program is stored in a computer-readable recording medium (information storage medium), and is read and executed by a computer to implement the method of the present invention. And the recording medium includes all types of recording media (intangible medium such as a carrier wave as well as tangible media such as CD and DVD) readable by a computer.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, But the present invention is not limited thereto.

1 is a configuration diagram illustrating a network configuration when an intra RNS handover occurs according to an embodiment of the present invention;

2 is a flowchart for explaining a process in which a general intra RNS handover is performed;

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

4 is a configuration diagram illustrating a network configuration in a case where an inter-RNS handover occurs according to another embodiment of the present invention;

FIG. 5 is a flowchart illustrating a process in which a general inter-RNS handover is performed.

6 is a flowchart illustrating an inter-RNS handover procedure according to another embodiment of the present invention.

FIG. 7 is a structural diagram illustrating a structure of a handover control apparatus of a terminal according to the present invention; FIG.

Claims (13)

A method for controlling handover of a terminal when a call is established 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 a mutual interception function of the second base station; And And blocking the mutual handover of the terminal if the call type is determined as a result of the call type determination of the terminal and the call blocking function is set to the second base station as a result of determining whether the call blocking function is set , Wherein the step of determining a call type of the terminal comprises: And determining the call type 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 according to claim 1, The handover request message includes: Wherein the handover control message is a measurement report message from the terminal. The method according to claim 1, The handover request message includes: And a radio link establishment request message from a base station controller controlling the first base station. delete The method according to claim 1, Wherein the step of determining a call type of the terminal comprises: Wherein the handover control is performed only when the mutual interception blocking function is set to the second base station. The method according to claim 1, Wherein the step of determining whether to set the mutual interception function comprises: And determining whether to set the blocking function by referring to each cell's blocking function setting database included in the second base station. The method according to claim 1, Wherein the step of determining whether to set the mutual interception function comprises: Wherein the handover is performed only when the call type is a picture call as a result of the call type determination of the terminal. The method according to claim 1, Wherein the blocking mutual handover comprises: And transmitting a radio link setup failure message to the first base station controller. delete An apparatus for controlling a handover of a terminal when a terminal having a call set in the first base station moves to a second base station, A message transmission / reception unit receiving a handover request message of the MS and transmitting a response message for the handover request message; A call type determination unit for determining a call type of the terminal; A blocking function setting determining unit for determining whether to set a mutual blocking function of the second base station; And A handover controller for blocking the mutual handover of the terminal if the call type is determined as a result of the call type determination of the terminal and the call blocking function is set to the second base station as a result of determining whether the call blocking function is set, Including, The call type determination unit, And determines the call type by determining whether a field value indicating a call type of the terminal included in the handover request message satisfies a predetermined condition. 11. The method of claim 10, The blocking function setting determination unit may determine, And determines whether to set the blocking function with reference to each cell blocking function setting database included in the second base station. A method for controlling handover of a terminal when a call is established 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 mutual interception function of the second base station; And And blocking the handover of the terminal when the call blocking function is set to the second base station and the call type of the terminal is a picture call, The first base station and the second base station are controlled by the same base station controller, Wherein the step of determining whether to set the mutual interception function comprises: And determining whether to set the blocking function by referring to each cell's blocking function setting database included in the second base station. A method for controlling a handover of a terminal when a call is established 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 a mutual interception function of the second base station; And And blocking the mutual handover of the terminal if the call type is determined as a result of the call type determination of the terminal and the call blocking function is set to the second base station as a result of determining whether the call blocking function is set , Wherein the step of determining a call type of the terminal comprises: And determining the call type by determining whether a field value indicating a call type of the terminal included in the handover request message satisfies a predetermined condition.

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