KR101268462B1 - System and Method for connecting call of mobile termianl located in cell boundary - Google Patents

Abstract

The system and method for call connection of a mobile station located at a cell boundary according to the present invention transmit an RRC connection request message including a pilot strength measurement value of a current cell or a monitoring cell to a base station controller through a base station of a current cell when a call connection is attempted. A mobile terminal for transmitting and, when an RRC connection setup message is received from at least one base station, selecting one of the base stations which transmitted the RRC connection setup message to transmit an RRC connection setup complete message, and an RRC connection from the mobile terminal. The mobile station attempts to make the first call by including a base station controller for requesting transmission of an RRC connection setup message to the mobile station by the base station of the current cell and the monitoring cell when the pilot strength measurement value of the monitoring cell is present in the request message. If you do this, the call association By simultaneously sending messages, the success rate of access at the cell boundary can be improved.

RRC, pilot strength, cell, call connection

Description

System and Method for connecting call of mobile termianl located in cell boundary}

The present invention relates to a system and method for call connection of a mobile station located at a cell boundary, and more particularly, to an RRC including a pilot strength measurement value of a current cell or a monitoring cell when a call connection attempt is performed by a mobile station located at a cell boundary. (Radio Resource control) When the connection request message is transmitted to the base station controller through the base station of the current cell, the base station controller analyzes the RRC connection request message to determine whether the mobile terminal can move to another cell, and The present invention relates to a system and method for call connection between a mobile station located at a cell boundary that requests an RRC connection setup message to a base station of a current cell and a monitoring cell to establish an RRC connection between the mobile station and the base station.

In order to set up a call in a mobile communication system, RRC (Radio Resource Control) connection is first performed between a mobile station and a base station.

That is, the mobile station selects the cell with the strongest pilot strength (receive power) among the cells that receive the signal to connect the call. Thereafter, the mobile station requests an RRC connection to a base station of the selected cell using a random access channel (RACH), which is an uplink access channel. The RRC connection request message includes a message type, a terminal identifier, a setting reason, a protocol error indicator, and a connection result of a random access channel.

The base station of the specific cell receiving the RRC connection request from the mobile station checks a network state and forwards an RRC connection accept or RRC connection rejection message to a downlink channel according to the confirmed network state. Transfer to the mobile terminal using.

However, when the mobile station is located at a cell boundary and attempts to make a call, the terminal transmits and receives a radio message only through the current cell in which the mobile station is located when attempting the first call. When moving to a cell, there is a lot of problems that the call connection is not made due to poor radio environment with the existing cell.

In addition, when the mobile station is in a state where the network state of the cell base station in which the mobile station is located is capable of performing RRC connection, the mobile station and the base station may establish an RRC connection to establish a call. If the mobile station cannot perform the call, the mobile station has a disadvantage in that it cannot establish a call with the base station.

An object of the present invention is to transmit a message related to a call connection to both the current cell and the neighbor cell at the same time when the mobile station attempts the first call, thereby improving the success rate of access at the cell boundary. A system and method for call connection are provided.

Another object of the present invention is to provide a system and method for call connection of a mobile terminal located at a cell boundary to prevent continuous call connection failure in the mobile terminal.

Yet another object of the present invention is a cell for making an RRC connection with a corresponding tacell base station even when the mobile station moves to another cell instead of the current cell when the RRC connection is requested according to a call connection attempt of a mobile station located at a cell boundary. The present invention provides a system and method for call connection of a mobile terminal located at a boundary.

According to an aspect of the present invention to achieve the above object, at the time of the call connection attempt to transmit an RRC connection request message including a pilot strength measurement value of the current cell or monitoring cell to the base station controller through the base station of the current cell, Monitors an RRC connection request message from the mobile station, which selects one of the base stations which have transmitted the RRC connection setup message and transmits an RRC connection setup complete message when the RRC connection setup message is received from the base station of the mobile station; Provided is a system for a call connection of a mobile station located at a cell boundary including a base station controller for requesting transmission of an RRC connection setup message to the mobile station by a base station of a current cell and a monitoring cell when a pilot strength measurement of a cell exists. do.

Each base station that is requested to transmit an RRC connection setup message from the base station controller transmits an RRC connection setup message to the mobile station.

In addition, after receiving a request for transmission of an RRC connection setup message from the base station controller, each base station checks a network state, and then receives an RRC connection setup message for accepting an RRC connection or an RRC connection rejection message for rejecting an RRC connection according to the confirmed network state. Send to the mobile terminal.

The monitoring cell refers to at least one cell having a pilot strength measurement value of a predetermined value or more.

When the RRC connection setup message is received from two or more base stations, the mobile station selects a base station that has transmitted the first RRC connection setup message and transmits an RRC setup complete message.

In addition, when an RRC connection setup message is received from two or more base stations, the mobile station selects a base station that has transmitted a RRC connection setup message having good reception performance and transmits an RRC setup complete message.

In addition, when more than one pilot strength measurement value exists in the RRC connection request message, the base station controller requests transmission of an RRC connection setup message to a base station of a cell having a pilot strength measurement value of a predetermined value or more.

According to another aspect of the present invention, a communication unit for communication with the base station, by analyzing the RRC connection request message received through the communication unit to determine the presence of the pilot strength measurement value of the monitoring cell, the movement based on the determination result Message analysis unit for determining whether the mobile station can move to another cell, monitoring result of the message analysis unit, if there is a pilot strength measurement value of the cell, the current cell and monitoring request to send an RRC connection setup message to the mobile terminal A base station controller is provided that includes an RRC connection establishment control unit, each transmitting to a base station of a cell.

The RRC connection setting controller selects a base station of a monitoring cell having a pilot strength measurement value of a predetermined value or more, when two or more monitoring cell pilot strength measurement values exist as a result of the analysis of the message analyzer, and selects an RRC to the base station of the selected cell. Request to send a connection setup message.

According to another aspect of the present invention, the communication unit for communication with the base station, when the call connection attempt to generate an RRC connection request message including a pilot strength measurement value of the current cell or monitoring cell to the base station controller through the base station of the current cell RRC connection request unit for transmitting, when the RRC connection setup message is received from at least one base station RRC for setting the RRC connection by selecting one of the base stations that transmitted the RRC connection setup message to send an RRC connection setup complete message A mobile terminal including a connection setting unit is provided.

When the RRC connection request unit attempts to connect a call, the pilot strength of the neighboring cell as well as the current cell is measured, and the pilot strength of the current cell or the monitoring cell is measured using a cell whose pilot strength measurement value of the neighbor cell is greater than or equal to a predetermined value as a monitoring cell. Create an RRC Connection Request message that contains a value.

In addition, when an RRC connection setup message is received from two or more base stations, the RRC connection setup unit selects a base station that has transmitted the first RRC connection setup message and transmits an RRC setup complete message.

In addition, when the RRC connection setup message is received from two or more base stations, the RRC connection setup unit selects a base station that has transmitted an RRC connection setup message having good reception performance and transmits an RRC setup complete message.

According to another aspect of the present invention, (a) transmitting an RRC connection request message including a pilot strength measurement value of a current cell or a monitoring cell to a base station controller at the mobile terminal's call attempt, ( b) determining whether the mobile station can move to another cell by analyzing the RRC connection request message in the base station controller; (c) the mobile station can move to another cell as a result of the determination of the step (b) in the base station controller; Requesting transmission of the RRC connection setup message to the base station of the current cell and the monitoring cell; (d) transmitting the RRC connection setup message to the mobile station by the base station that has been requested to transmit the RRC connection setup message from the base station controller; e) the mobile station transmits the RRC connection setup message when the RRC connection setup message is received from at least one base station; A method for a call connection of the mobile terminal located in a cell boundary to gukjung selecting a base station, including the step of transmitting a RRC connection setup complete message is provided.

In the step (b), when the pilot strength measurement value of the monitoring cell exists in the message, the RRC connection request message is analyzed and the mobile terminal may move to another cell.

In step (e), when the RRC connection setup message is received from two or more base stations, when the RRC connection setup message is received from two or more base stations, the base station or the reception performance of the first received RRC connection setup message is good. The base station which sent the RRC connection setup message is selected to transmit the RRC setup complete message.

According to another aspect of the present invention, in the method for the base station controller to control the RRC connection establishment for the call connection of the mobile station located at the cell boundary, when the RRC connection request message is received from the mobile station, the RRC connection request Analyzing the message to determine whether a pilot strength measurement value of the monitoring cell exists; and if the pilot strength measurement value of the monitoring cell exists, requesting transmission of an RRC connection setup message to a base station of the current cell and the monitoring cell; When the RRC connection setup complete message is received, the RRC connection establishment control method for call connection of a mobile station located at a cell boundary including storing RRC connection information is provided.

According to another aspect of the present invention, a method for a mobile terminal to establish an RRC connection with a base station for call connection, comprising the steps of: (a) measuring the pilot strength of a current cell and an adjacent cell when attempting a call connection; b) generating a RRC connection request message including a pilot strength measurement value of the current cell and the monitoring cell by using the cell as a monitoring cell when a cell having a predetermined value or more exists among the measured pilot strengths of the adjacent cells; (c) transmitting the generated RRC connection request message to a base station controller through a base station of a current cell; (d) a base station transmitting the RRC connection setup message when an RRC connection setup message is received from at least one base station; R for the mobile station's call access located at the cell boundary, comprising the step of selecting one of the base stations and transmitting an RRC connection setup complete message A method of establishing an RC connection is provided.

In step (d), when an RRC connection setup message is received from two or more base stations, the RRC setup is performed by selecting a base station that has transmitted the first RRC connection setup message received or a base station that has transmitted a RRC connection setup message having a good reception performance. Send a completion message.

As described above, according to the present invention, when the mobile station attempts the first call, the mobile station transmits a message related to call connection to both the current cell and the neighbor cell at the same time, thereby improving the access success rate at the cell boundary. It is possible to provide a system and method for call connection of a located mobile terminal.

In addition, it is possible to provide a system and method for call connection of a mobile terminal located at a cell boundary that can prevent continuous call connection failure in the mobile terminal.

In addition, when the RRC connection is requested according to the call connection attempt of the mobile terminal located at the cell boundary, the mobile terminal located at the cell boundary such that the RRC connection with the corresponding tacell base station is made even if the mobile terminal moves to another cell instead of the current cell. It is possible to provide a system and method for a call connection of a mobile station.

The foregoing and other objects, features, and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

1 is a diagram illustrating a system for call connection of a mobile terminal located at a cell boundary according to the present invention.

Referring to FIG. 1, a system for call access of a mobile station located at a cell boundary includes a base station 130a, 130b, a base station that performs wireless section communication with a mobile terminal 100, and has functions such as channel coding and interleaving. A base station controller 150 connected to the base station 130a and 130b to perform control of the base station 130a and 130b and control of radio resources, and a call exchange connected to the base station controller 150 to provide a service to the mobile terminal 100 And a home location register (not shown) connected to the switch (not shown) to perform the operation, and storing and managing location information, additional service information, etc. of the subscriber of the mobile communication network.

When the mobile terminal 100 first attempts to make a call, the mobile terminal 100 transmits an RRC connection request message including a pilot strength measurement value of the current cell A or the monitoring cell B to the first base station 130a of the current cell A. It transmits to the base station controller 150 through. The current cell A refers to a cell in which the mobile terminal 100 is currently located, and the monitoring cell B may be an adjacent cell having a pilot strength measurement value of a predetermined value or more.

When the RRC connection setup message is received from at least one base station, the mobile terminal 100 selects one base station from which the RRC connection setup message is transmitted and transmits an RRC connection setup message.

That is, when an RRC connection setup message is received from two or more base stations, the mobile terminal 100 transmits an RRC setup complete message or an RRC connection setup message having a good reception performance to the base station that first transmitted the received RRC connection setup message. The RRC setup complete message is transmitted to the base station.

In addition, the mobile terminal 100 transmits an RRC connection setup complete message to the first base station 130a when the RRC connection setup message is received from the first base station 130a of the current cell A, and the monitoring cell. If received from the second base station 130b of (B) transmits an RRC connection setup complete message to the second base station (130b).

Detailed description of the mobile terminal 100 performing the above role will be referred to FIG. 3.

The base station controller 150 moves the RRC connection setup message when the pilot strength measurement value of the monitoring cell B is present in the RRC connection request message transmitted from the mobile station 100 through the first base station 130a. The command to transmit to the terminal 100 is transmitted to the base stations 130a and 130b of the current cell A and the monitoring cell B, respectively.

That is, the base station controller 150 monitors the mobile terminal 100 when the pilot strength measurement values of the current cell A and the monitoring cell B exist in the RRC connection request message transmitted from the first base station 130a. It is determined that the movement to the cell (B) is possible, and transmits an RRC connection setup message to the base stations (130a, 130b) of the current cell (A) and the monitoring cell (B).

In addition, when more than one pilot strength measurement exists in the RRC connection request message, the base station controller 150 may request transmission of an RRC connection setup message to a base station of a cell having a pilot strength measurement value of a predetermined value or more.

Detailed description of the base station controller 150 performing the above role will be described with reference to FIG. 2.

The base station receiving the request for transmitting the RRC connection setup message from the base station controller 150 transmits the RRC connection setup message to the mobile station 100.

2 is a block diagram schematically illustrating a configuration of a base station controller for call connection of a mobile station located at a cell boundary according to the present invention.

Referring to FIG. 2, the base station controller 130 for call connection of a mobile station located at a cell boundary analyzes an RRC connection request message received through the communication unit 132 and the communication unit 132 for communication with a base station. The analysis result monitoring cell of the message analysis unit 134 and the message analysis unit 134 to determine the presence or absence of a pilot strength measurement value of the monitoring cell and to determine whether the mobile terminal can move to another cell based on the determination result. The RRC connection setup control unit 136 transmits a command to the base station of the current cell and the monitoring cell to transmit an RRC connection setup message to the mobile station, if there is a pilot strength measurement.

The RRC connection request message includes mobile terminal identification information, a pilot strength measurement value of a current cell, a pilot strength measurement value of a monitoring cell, and the like.

The RRC connection setting control unit 136 transmits a command to transmit an RRC connection setup message to the base station of the current cell when there is no pilot strength measurement value of the analysis result monitoring cell of the message analyzing unit 134.

In addition, the RRC connection setting controller 136 sets up an RRC connection to a base station of a cell having a pilot strength measurement value of a predetermined value or more when a pilot strength measurement value of the analysis result monitoring cell of the message analyzer 134 exists. Send a message.

3 is a block diagram schematically illustrating a configuration of a mobile terminal for establishing an RRC connection with a base station for a call connection according to the present invention.

Referring to FIG. 3, the mobile terminal 100 includes a communication unit 102 for wireless communication, a key input unit 104 for inputting a user command, a storage unit 106, an output unit 108, and a current cell at a call connection attempt. RRC connection request unit 110 for transmitting the RRC connection request message to the base station controller through the base station of the RRC connection request unit 110, when the RRC connection setup message is received from at least one base station to the base station that transmitted the RRC connection setup message RRC connection setup unit 112 to set up an RRC connection by sending an RRC connection setup complete message.

The RRC connection request unit 110 generates an RRC connection request message including a pilot strength measurement value of a current cell or a monitoring cell when a call connection is attempted and transmits the generated RRC connection request message to a base station controller through a base station of the current cell.

That is, when the first call connection is attempted, the RRC connection requester 110 measures the pilot strength of the neighboring cell as well as the current cell, selects a cell whose measured value is greater than or equal to a predetermined value, and plots the pilot strength of the selected cell. The RRC connection request message including the measured value is generated and transmitted to the base station controller through the base station of the current cell. Here, a cell whose pilot intensity measurement value is equal to or greater than a predetermined predetermined value will be referred to as a monitoring cell.

If the RRC connection setup unit 112 receives an RRC connection setup message from two or more base stations, the RRC connection setup unit 112 transmits an RRC setup complete message or a RRC connection setup message having good reception performance to the base station that first transmitted the RRC connection setup message. The RRC setup complete message is transmitted to the base station that has transmitted the.

In addition, when the RRC connection setup message is received only from the base station of the current cell, the RRC connection setup unit 112 transmits an RRC connection setup complete message to the base station of the current cell.

Further, when the RRC connection setup message is received only from one base station of the base station of the monitoring cell, the RRC connection setup unit 112 transmits an RRC connection setup complete message to the base station of the corresponding monitoring cell. The reception of the RRC connection setup message from the base station of the monitoring cell may indicate that the mobile station located at the cell boundary has moved to the monitoring cell after requesting the RRC connection through the base station of the current cell.

4 is a flowchart illustrating a method for call connection of a mobile terminal located at a cell boundary according to the present invention.

Referring to FIG. 4, when a mobile terminal attempts to connect a call, the mobile station transmits an RRC connection request message including a pilot strength measurement value of a cell having a pilot strength of a predetermined value or more through a source base station of a current cell. Transfer to (S400).

That is, when a call connection is attempted, the mobile station measures the pilot strength of the adjacent cell as well as the current cell and determines a cell whose measured value is greater than or equal to a predetermined value. Then, the mobile station generates an RRC connection request message including a measured value of a cell having a pilot strength equal to or greater than a predetermined value, and uses the random access channel as an uplink channel to generate the RRC connection request message. To send.

Then, the base station controller analyzes the RRC connection request message to determine whether the mobile terminal can move to another cell (S402). That is, the base station controller analyzes the RRC connection request message and determines that the mobile station can move to another cell when the pilot strength measurement value of the monitoring cell exists in the message.

If it is determined in S402 that the mobile station can move to another cell, the base station controller requests the base station of the current cell and the monitoring cell to transmit an RRC connection setup message (S404a and S404b). The RRC connection setup message transmission request includes identification information of the mobile station.

Then, each base station of the current cell and the monitoring cell transmits an RRC connection setup message to the mobile terminal according to the RRC connection setup message transmission request (S406).

That is, each base station of the current cell and the monitoring cell confirms the network state, and then forwards an RRC connection setup message that accepts an RRC connection or an RRC connection rejection message that rejects an RRC connection according to the confirmed network state. It transmits to the mobile station using a forward access channel (FACH).

When the RRC connection setup message is received, the mobile station selects a base station that has transmitted the first RRC connection setup message received first and transmits an RRC setup complete message (S408).

Preferably, when the RRC connection setup message is received, the mobile station may select the base station that has transmitted the RRC setup message with good reception performance and transmit the RRC setup complete message.

When the RRC connection is requested according to the call connection attempt of the mobile station located at the cell boundary by the above process, even if the mobile station moves to another cell instead of the current cell, the RRC connection with the corresponding tacell base station may be made.

Accordingly, control information necessary for radio resource management is exchanged between the mobile station and the base station controller according to the RRC connection establishment procedure as described above, and a radio channel is established so that a call setup message can be transmitted to the exchange.

5 is a flowchart illustrating a method for establishing an RRC connection with a base station by a mobile terminal in accordance with the present invention.

Referring to FIG. 5, when a call connection is attempted by a user (S500), the mobile terminal measures the pilot strength of the current cell and the adjacent cell (S502).

Then, the mobile station determines whether a cell that is equal to or larger than a predetermined reference value exists among pilot intensity measurement values of the adjacent cell (S504).

When a cell having an intensity greater than or equal to a predetermined reference value exists among pilot strengths of the adjacent cell, the mobile terminal is at or near a cell boundary.

If there is a neighbor cell that is greater than or equal to the reference value as a result of the determination in S504, the mobile station generates an RRC connection request message including a measured value of the neighbor cell having a pilot strength of greater than or equal to the reference value and a measured value of the current cell, and controls the base station controller through the source base station. Transfer to (S506). An adjacent cell having a pilot strength above the reference value is called a monitoring cell.

After the step S506 is performed, the mobile station determines whether an RRC connection setup message is received from two or more base stations (S508).

When the RRC connection setup message is received by the two or more base stations as a result of the determination of S508, the mobile station selects one base station from which the RRC connection setup message has been transmitted and transmits an RRC connection setup complete message (S510).

That is, when an RRC connection setup message is received from two or more base stations, the mobile station selects a base station transmitting the first received RRC connection setup message or a base station transmitting an RRC connection setup message having high reception performance and completing RRC setup. Send a message.

Then, the mobile station can establish a call by performing an RRC connection with the base station receiving the RRC setup complete message (S512).

If the RRC connection setup message is not received from two or more base stations as a result of the determination in S508, it is determined whether an RRC connection setup complete message is received from only the base station of the current cell (S514).

If the RRC connection setup complete message is received from the base station of the current cell only, the mobile station transmits the RRC connection setup complete message to the base station of the current cell (S516).

If it is determined in S514 that the RRC connection setup complete message is not received from the base station of the current cell and an RRC connection setup complete message is received from one of the monitoring cells (S518), the RRC connection setup complete message is transmitted to the base station of the corresponding monitoring cell. It transmits (S520).

If, as a result of the determination in S504, a cell having a predetermined value or more is not present among the pilot strength measurement values of the neighboring cell, the mobile station generates an RRC connection request message including a pilot strength measurement value of the current cell to generate a source base station. Through the transmission to the base station controller (S522).

6 is a flowchart illustrating a method for establishing an RRC connection for a call connection of a mobile station located at a cell boundary according to the present invention.

Referring to FIG. 6, when an RRC connection request message is received (S600), the base station controller analyzes the RRC connection request message to determine whether a pilot strength measurement value of a monitoring cell exists in the message (S602).

As a result of the determination in S602, if there is a pilot strength measurement value of the monitoring cell, the base station controller determines that the mobile terminal may move to the monitoring cell and requests transmission of an RRC connection setup message to the base station of the current cell and the monitoring cell (S604). ).

The base station which has been requested to transmit the RRC connection setup message transmits an RRC connection setup message to the mobile station.

After performing the step S604, the base station controller receives the RRC connection setup complete message RRC connection is completed and stores the result (S606).

If it is determined in S602 that the pilot strength measurement value of the monitoring cell does not exist in the message, the base station controller requests transmission of an RRC connection setup message to the base station of the current cell (source cell) (S608). Then, only the base station of the current cell (source cell) transmits an RRC connection setup message to the mobile station.

As such, those skilled in the art will appreciate that the present invention can be implemented in other specific forms without changing the technical concept or essential characteristics. It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

As described above, the system and method for the call connection of the mobile terminal located at the cell boundary according to the present invention can be used in a technique for improving the call connection rate of the mobile terminal located at the cell boundary to achieve stable call connection.

1 is a diagram illustrating a system for call connection of a mobile terminal located at a cell boundary according to the present invention.

2 is a block diagram schematically illustrating a configuration of a base station controller for call connection of a mobile station located at a cell boundary according to the present invention.

3 is a block diagram schematically illustrating a configuration of a mobile terminal for establishing an RRC connection with a base station for call connection according to the present invention;

4 is a flowchart illustrating a method for call connection of a mobile terminal located at a cell boundary according to the present invention.

5 is a flowchart illustrating a method for establishing an RRC connection with a base station by a mobile terminal according to the present invention for call connection;

6 is a flowchart illustrating a method for establishing an RRC connection for a call connection of a mobile station located at a cell boundary by a base station controller according to the present invention;

<Explanation of symbols for the main parts of the drawings>

100: mobile terminal 102, 132: communication unit

104: key input unit 106: storage unit

108: output unit 110: RRC connection request unit

112: RRC connection setting unit 130: base station

150: base station controller 134: message analysis unit

136: RRC connection setting control

Claims (18)

At the call connection attempt, an RRC connection request message including a pilot strength measurement value of a current cell or a monitoring cell is transmitted to a base station controller through a base station of the current cell, and when the RRC connection setup message is received from at least one base station, the RRC connection A mobile station for selecting one of the base station that has transmitted the setup message to transmit the RRC connection setup complete message; And When the RRC connection request message is received from the mobile terminal, the RRC connection request message is analyzed to determine whether a pilot strength measurement value of the monitoring cell exists, and when the pilot result measurement value of the monitoring cell exists, A base station controller for requesting transmission of an RRC connection setup message to a base station of a cell and a monitoring cell; System for call connection of a mobile terminal located at the cell boundary comprising a. The method of claim 1, Each base station, which has been requested to transmit an RRC connection setup message from the base station controller, checks a network state and then moves an RRC connection setup message that accepts an RRC connection or an RRC connection rejection message that rejects an RRC connection according to the confirmed network state. A system for call access of a mobile terminal located at a cell boundary, characterized in that the transmission to the terminal. The method of claim 1, When the mobile station receives an RRC connection setup message from two or more base stations, the mobile station selects a base station that transmits the first received RRC connection setup message and transmits an RRC setup complete message. System for call connection. The method of claim 1, When the mobile station receives an RRC connection setup message from two or more base stations, the mobile station selects a base station that transmits an RRC connection setup message having good reception performance and transmits an RRC setup complete message. System for call connection. The method of claim 1, If there is more than one pilot strength measurement in the RRC connection request message, the base station controller requests transmission of an RRC connection setup message to a base station of a cell having a pilot strength measurement value of a predetermined value or more. System for call connection of located mobile terminal. A base station controller for controlling an RRC connection establishment for a call connection of a mobile station located at a cell boundary, A communication unit for communicating with a base station; A message analyzing unit for analyzing the RRC connection request message received through the communication unit to determine whether a pilot strength measurement value exists in a monitoring cell, and determining whether the mobile terminal can move to another cell based on the determination result; and An RRC connection setting controller for transmitting a request for transmitting an RRC connection setup message to the mobile station to the base station of the current cell and the monitoring cell, when there is a pilot strength measurement value of the monitoring cell; Base station controller comprising a. The method of claim 6, The RRC connection setting controller selects a base station of a monitoring cell having a pilot strength measurement value of a predetermined value or more, when two or more monitoring cell pilot strength measurement values exist as a result of the analysis of the message analyzer, and selects an RRC to the base station of the selected cell. Requesting transmission of a connection setup message. In a mobile terminal for establishing an RRC connection with a base station for a call connection, A communication unit for communicating with a base station; RRC connection including the pilot strength measurement of the current cell or the monitoring cell by measuring the pilot strength of the current cell or the neighboring cell and measuring the pilot strength of the current cell or the neighboring cell as a monitoring cell. RRC connection request unit for generating a request message and transmitting to the base station controller through the base station of the current cell; And An RRC connection setup unit configured to set an RRC connection by selecting one of the base stations which have transmitted the RRC connection setup message and transmitting an RRC connection setup complete message when an RRC connection setup message is received from at least one base station; Mobile terminal comprising a. delete 9. The method of claim 8, When the RRC connection setup message is received from two or more base stations, the RRC connection setup unit selects a base station that transmits the first received RRC connection setup message and transmits an RRC setup complete message. 9. The method of claim 8, When the RRC connection setup message is received from two or more base stations, the RRC connection setup unit selects a base station that transmits an RRC connection setup message having a good reception performance and transmits an RRC setup complete message. (a) transmitting an RRC connection request message including a pilot strength measurement value of a current cell or a monitoring cell to a base station controller when a mobile terminal attempts a call; (b) analyzing, by the base station controller, the RRC connection request message to determine whether the mobile station can move to another cell; (c) If the base station controller determines that the pilot strength measurement value of the monitoring cell is present in the RRC connection request message and thus moves to another cell, it is determined that the base station controller is in the base station of the current cell and the monitoring cell. Requesting to send a connection setup message; (d) transmitting a RRC connection setup message to the mobile station by a base station that is requested to transmit an RRC connection setup message from the base station controller; and (e) when the mobile station receives an RRC connection setup message from at least one base station, selecting one base station from which the RRC connection setup message has been transmitted and transmitting an RRC connection setup complete message; Method for call connection of a mobile station located at the cell boundary comprising a. delete The method of claim 12, In the step (e), When an RRC connection setup message is received from two or more base stations, an RRC setup complete message is transmitted by selecting a base station which has transmitted the first RRC connection setup message received or a base station which has transmitted a RRC connection setup message having high reception performance. A method for call connection of a mobile station located at a cell boundary. A method for controlling an RRC connection establishment for a call connection of a mobile station located at a cell boundary by a base station controller, When the RRC connection request message is received from the mobile station, analyzing the RRC connection request message to determine whether a pilot strength measurement value of a monitoring cell exists; Requesting transmission of an RRC connection setup message to a base station of a current cell and a monitoring cell if a pilot strength measurement value of a monitoring cell exists; and If an RRC connection setup complete message is received, storing RRC connection information; RRC connection establishment control method for a call connection of a mobile station located at the cell boundary including a. 16. The method of claim 15, If the pilot strength measurement value of the monitoring cell does not exist in the RRC connection request message, requesting transmission of an RRC connection setup message to the base station of the current cell, RRC connection establishment control for a mobile terminal located in a cell boundary Way. In the method for the mobile terminal to establish the RRC connection with the base station for the call connection, (a) measuring pilot strength of a current cell and an adjacent cell when attempting to connect a call; (b) generating an RRC connection request message including a pilot strength measurement of a current cell or a monitoring cell by using a cell whose pilot strength measurement of the neighboring cell is equal to or greater than a predetermined predetermined value as a monitoring cell; (c) transmitting the generated RRC connection request message to a base station controller through a base station of a current cell; and (d) when the RRC connection setup message is received from at least one base station, selecting one of the base stations which transmitted the RRC connection setup message and transmitting an RRC connection setup complete message; RRC connection establishment method for a call connection of a mobile station located at the cell boundary including a. 18. The method of claim 17, In the step (d), When an RRC connection setup message is received from two or more base stations, an RRC setup complete message is transmitted by selecting a base station which has transmitted the first RRC connection setup message received or a base station which has transmitted a RRC connection setup message having high reception performance. RRC connection establishment method for call connection of mobile station located at cell boundary.

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