KR20010098006A - Device and method for restricting mobility of wll system mobile station - Google Patents

Abstract

The present invention provides an apparatus and method for mobility limitation of a WLL system terminal.

According to the apparatus and method of the present invention, in the mobile communication WLL system, the terminal registers in a sector of a specific base station by establishing a location history of the terminal as a database and limiting the movement range of the base station using location registration and handoff functions. If location registration / calling is performed at base station or sector, or when handoff is attempted to another base station or other sector, the system can forcibly disconnect the call or interrupt service, which can prevent the degradation of call quality. have.

Description

Device and method for limiting mobility of ＷＬＬ SYSTEM terminal {DEVICE AND METHOD FOR RESTRICTING MOBILITY OF WLL SYSTEM MOBILE STATION}

The present invention relates to a mobile communication wireless local loop (WLL) system, and more particularly, to establish a location history of a terminal as a database in a mobile communication WLL system and to limit the moving range of a base station by using a location registration and a handoff function. If a terminal registered in a sector of a specific base station performs location registration / calling attempt in another base station or sector, or attempts to handoff to another base station or another sector, the system forcibly disconnects the call or interrupts the service. The present invention relates to an apparatus and method for limiting mobility of a WLL system terminal.

In the case of the WLL system replacing the existing wired network with the wireless network, mobility is limited due to its characteristics. Therefore, since the reverse wireless environment is more stable than the existing mobile communication, it has a gain in capacity compared to the existing mobile communication. However, if the WLL terminal has mobility because the mobile subscriber is not limited to call processing by cell and sector unit, the call quality cannot be obtained.

In the prior art, the mobility of the terminal in the WLL system is attempted to limit the mobility by using a physical method such as the use of an external antenna. However, when the physical method is used, each terminal has to deal with all of them, which requires a lot of manpower and cost.

SUMMARY OF THE INVENTION The present invention has been made under the above-mentioned background. In the mobile communication WLL system, a terminal registers in a sector of a specific base station by constructing a location history of the terminal as a database and limiting the movement range of the base station using location registration and handoff functions. Device and method for mobility limitation of a WLL system terminal which causes the system to forcibly disconnect or suspend service when a location registration / calling attempt is performed in another base station or sector or when a handoff is attempted to another base station or another sector. The purpose is to provide.

1 is a view showing the position of the mobility limiting device of the WLL system of the present invention,

2 is a diagram illustrating a configuration of a mobility limiting device of the WLL system of the present invention and other devices;

3 is a flowchart showing a mobility restriction method of the WLL system of the present invention.

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

100: mobility limit device 110: input / output

120: sub-database 130: terminal movement determining unit

140: call setup controller 200: terminal

210: terminal call processing unit 300: exchanger database

400: base station 410: base station call processing unit

500: exchanger

In order to achieve the above object, a mobility limiting device of a WLL system terminal of the present invention includes an input / output unit for receiving and outputting location registration information and handoff information from a terminal call processing unit and terminal location authentication information from an exchange database. / A sub-database storing terminal location registration information and handoff information from the output unit and terminal information registered in the base station, and reading the location registration information of the corresponding terminal and terminal information registered in the corresponding base station from the sub-database. From the terminal movement determination unit and the terminal movement determination unit to determine whether the terminal is moved based on the handoff information from the sub-database, and to receive and output the terminal location authentication information from the input / output unit. Call setup control unit to control call setup according to output signal. It is characterized by the comparison.

In addition, the mobility limitation method of the WLL system terminal of the present invention, the first step of storing the terminal information registered in the base station stored in the exchange database in the sub-database, the second step of determining whether there is a call setup request from the terminal Step 3, comparing the location information of the terminal requesting the call setting with the information of the registered terminal of the sub-database, when there is a call setup request from the terminal in the second step; call setup as a result of the comparison If the request terminal location information and the registration terminal information are the same, a fourth step of receiving call establishment approval from the switchboard database; a fifth step of determining whether a handoff occurs for the call thus set; and a handoff has occurred in the fifth step. 6th step requesting the call disconnection to the exchange and a terminal restriction message to the terminal. Characterized in that it comprises a seventh step of transmitting.

Hereinafter, an apparatus and a method for limiting mobility of a WLL system terminal according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing the position of the mobility limiting device of the WLL system of the present invention, as shown, the mobility limiting device 100, the terminal 200, the exchange database 300, the base station 400 and the switch 500 )

The mobility limiting device 100 may be installed separately from the base station 400 or installed in the call processing unit (FIG. 2; 410) of the base station, and determines the movement of the terminal in connection with the base station 400 to limit the call processing. . The exchange database 300 may be a visitor location register (VLR).

2 is a view showing the configuration of the mobility limiting device of the WLL system of the present invention, the mobility limiting device 100 is the input / output unit 110, the sub-database 120, the terminal mobility determination unit 130 and The call setup control unit 140 is configured to operate in connection with the terminal call processing unit 210, the exchange database 300, and the base station call processing unit 410.

The input / output unit 110 receives the location registration information and the handoff information from the terminal call processing unit 210 and outputs it to the sub-database 120, and also receives the terminal location authentication information from the exchange database 300. It receives the input and outputs to the terminal movement determination unit 130. The sub-database 120 receives and stores the terminal location registration information and the handoff information from the input / output unit 110 and receives and stores the terminal information registered in the base station from the exchange database 300. have. Meanwhile, the terminal movement determination unit 130 reads the location registration information of the corresponding terminal stored in the sub-database 120 and the terminal information registered in the corresponding base station, and compares their differences, and the comparison result is the same. The terminal determines whether to move the terminal based on the handoff information from the sub-database 120, receives terminal location authentication information from the input / output unit, and outputs the terminal location authentication information to the call setup controller 140. The call setup controller 140 outputs a call setup control signal to the input / output unit 110 according to the output signal from the terminal movement determination unit 130. If the terminal movement determination unit 130 does not receive the location authentication information from the exchange database 300, the base station call processing unit 410 limits the call processing by the call setup control signal to limit the mobility of the terminal.

Since the specific operation of the configuration will be clearly understood by the above description, the description thereof will be omitted below.

Hereinafter, a method for restricting mobility of a WLL system terminal according to the present invention will be described in detail with reference to FIGS. 3 and 1 and 2 showing a flowchart.

In FIG. 3, S represents a step.

First, the terminal information stored in the base station stored in the exchange database 300 is stored in the sub-database (S10), and then it is determined whether there is a call setup request from the terminal 200 (S20). When there is a call setup request from the terminal 200 in step S20, the location information of the terminal 200 requesting the call setup is compared with the information of the registered terminal of the sub-database 120 (S30). If the call setup request terminal location information and the registration terminal information are the same as the result of the comparison, the call setup approval is requested from the exchange database 300 to receive the approval (S40).

It is determined whether a handoff occurs by the movement of the terminal 200 with respect to the call set up as described above (S50). When the handoff occurs in the step S50, the terminal movement determination unit 130 determines that the terminal is moving and requests the call exchange from the switch 500 (S60). Then, the exchange 500 transmits a message for limiting the use of the terminal to the terminal 200 (S70).

On the other hand, when the call setup request terminal location information and the registration terminal information is not the same as the result of the comparison of step S30, the process proceeds to step S60 for requesting call disconnection.

In the comparison step of S30, the terminal information to be compared includes an electronic serial number (ESN) and a mobile identification number (MIN).

According to the apparatus and method of the present invention described so far, the mobile communication WLL system establishes the location history of the terminal as a database and registers in the sector of a specific base station by limiting the moving range of the base station by using the location registration and handoff functions. If a registered terminal attempts location registration / calling from another base station or sector, or attempts to handoff to another base station or other sector, the system may forcibly disconnect the call or interrupt the service to prevent degradation of call quality. The effect can be obtained.

Claims (5)

An input / output unit for receiving and outputting the location registration information and the handoff information from the terminal call processing unit and the terminal location authentication information from the exchange database, the terminal location registration information and the handoff information from the input / output unit and the base station Reads and compares the terminal registration information of the terminal with the location registration information of the terminal from the sub-database storing the terminal information and the sub-database, and whether the terminal is moved based on the handoff information from the sub-database. And a call setup control unit which determines whether to receive and output terminal location authentication information from the input / output unit and to control call setup according to an output signal from the terminal movement determination unit. Mobility limiter of WLL system terminal. The apparatus of claim 1, wherein the input / output unit transmits a call setup control signal from the call setup controller to the base station call processor. A first step of storing terminal information registered in a corresponding base station stored in the exchange database in a sub-database, a second step of determining whether there is a call setup request from the terminal, and a call setup request from the terminal in the second step A third step of comparing the location information of the terminal requesting call setup and the information of the registered terminal of the sub-database, and if the call setup request terminal location information and the registration terminal information are the same as the result of the comparison, the exchanger. A fourth step of receiving call establishment approval from the database; a fifth step of determining whether a handoff occurs for the call set up; and a sixth step of requesting call disconnection from the exchange if the handoff occurs in the fifth step; And a seventh step of transmitting a terminal restriction message to the WLL. Mobility Limiting the system terminal. 4. The mobility limitation of the WLL system terminal according to claim 3, wherein if the call setup request terminal location information and the registration terminal information are not the same as the result of the comparison in the third step, the mobile station proceeds to the sixth step of requesting call disconnection. Way. 4. The method of claim 3, wherein the registration terminal information includes an electronic serial number (ESN) and a mobile identification number (MIN).