KR20030025979A - A method of calling by mobile phone for wll - Google Patents

Abstract

PURPOSE: A call setup method for a WLL(Wireless Local Loop) terminal is provided to limit the location of the WLL terminal so that the WLL terminal is not moved without permission. CONSTITUTION: An intrinsic PN(Pseudo Noise) offset value of a corresponding base station is read from an embedded non-volatile memory(S100). It is judged whether a PN offset value received from a current located base station is identical to the PN offset value read from the non-volatile memory(S110). If the PN offset value received from the current located base station is identical to the PN offset value read from the non-volatile memory, a terminal requests a call setup to the corresponding base station(S120). If the setup of a communication call is achieved, a communication is performed through the terminal(S130).

Description

Call setup method of wireless subscriber network terminal {A METHOD OF CALLING BY MOBILE PHONE FOR WLL}

The present invention relates to terminal location limitation of a wireless local loop (WLL), and more particularly, to a method of restricting movement by a terminal.

The Wireless Subscriber Network (WLL) replaces the existing wired communication line between the telephone company and the subscriber terminal by wireless. When the wired telephone is installed in a sparsely populated area such as a rural area, it is necessary to install the wired communication line. It is designed to reduce costs.

The wireless system used in the wireless subscriber network (WLL) is a microwave system, a cordless system cellular mobile communication system, etc. The most inexpensive and technically easy wireless system is a code division multiplex (CDMA) cellular mobile communication system.

As described above, the wireless subscriber network (WLL) using the mobile communication system replaces the existing wired telephone network, and uses the mobile communication terminal as the wireless subscriber network terminal, and at the same time, the communication fee system is similar to the existing wired telephone fee. Since it should be adjusted to, the mobility of the terminal should be limited to a limited area.

Hereinafter, a method for restricting terminal movement of a wireless subscriber network according to the prior art will be described with reference to the accompanying drawings.

It is attached to explain the prior art, Figure 1 is a functional block diagram of a general wireless subscriber network, Figure 2 is a flow chart of a mobile subscriber network terminal restriction method according to the prior art.

Referring to FIG. 1, the general wireless subscriber network (WLL) includes a switching center 10 that controls and manages the entire wireless subscriber network and switches communication paths of respective subscribers.

A location registration unit 15 connected to the switching center 10 and recording registration information of a corresponding base station in which a plurality of subscriber stations are registered to receive a service;

A first base station 20 and a second base station 30 connected to the switching center 10 and wirelessly outputting a communication signal transmitted to each subscriber and applying a communication signal input from each subscriber to the switching station by wire. Multiple base stations,

A first area 22 serving as the service area of the first base station 20 and a second area 32 serving as the service area of the second base station 30;

The first terminal 40 and the second terminal 42 communicating in the first area 22 and the third terminal 50 and the fourth terminal 52 communicating in the second area 32 are connected. It consists of a plurality of terminals including.

By using the wireless subscriber network (WLL) having the above-described configuration, the conventional method for limiting mobility of a terminal includes the terminal 40, 42, 50, and 52 being connected wirelessly to the base station 20, 30 to establish a call connection. A first step (S10) of determining whether a request is made or a handoff is requested to continue ongoing communication by another base station;

If the terminal (40, 42, 50, 52) is determined in the step (S10) and wants to communicate by requesting a call connection or handoff, the base station (20, 30) is registered in the location register (15) A second step (S20) of determining whether the terminal (40, 42, 50, 52) is registered and returning to the first step if not registered;

In the case of the terminal (40, 42, 50, 52) registered in the location registration unit 15 to receive the service from the base station determined in the step (S20), the third step of setting a call for communication ( S30),

The terminal 40, 42, 50, 52, the call is set by the step (S30) is a fourth step (S40) for communicating with,

If it is determined whether to continue the communication by the step (S40) to continue, it is composed of a fifth step (S50) is fed back to the fourth step (S40), and if not continued.

Hereinafter, with reference to the accompanying drawings, a method for restricting terminal movement according to the prior art having the above configuration will be described in detail.

The plurality of terminals including the first terminal 40 and the second terminal 42 may communicate only within the first area 22 which is a service area of the first base station 20. At the same time, a plurality of terminals including the third terminal 50 and the fourth terminal 52 can also communicate only within the second area 32 which is a corresponding service area of the second base station 30. It is recorded in the position register 15 so that.

Each of the terminals 40, 42, 50, and 52 as described above may request a new call connection or communicate with another base station 20,30 in order to communicate in the service area of the specific base station 20,30. In step S10, the mobile station enters the service area of the new base station 20.30 in the service area of the service area and requests a handoff to continue the communication (S10).

As a result of the determination (S10), the corresponding base station (20, 30) is a terminal (40, 42, 50, 52) registered to receive the mobile communication service in the service area by searching the database of the location register 15; In the case of a registered terminal (S20), by setting a corresponding call for communication by the switching action of the switching station 10 (S30), the communication proceeds (S40). ).

It is determined whether to continue or terminate the above communication (S50). If the process continues, the process returns to the fourth step S40, and when it does not continue, the process ends.

However, the above-described conventional technique limits the communication area of the terminals 40, 42, 50, and 52, and records them in the location register 15 via the switching station 10 at the base stations 20 and 30. It is to determine whether or not the terminal (40, 42, 50, 52) registered to communicate within the service area (22, 32) by searching the registered database, a plurality of terminals (40, 42, When a call connection for communication at the same time is requested from 50 and 52, a lot of load is applied to the base stations 20 and 30, so that the processing speed of the wireless subscriber network (WLL) is delayed and the reliability of the system is There was a problem such as falling.

In particular, when the terminals 40, 42, 50, 52 are located at the edges of the service areas 22, 32, and frequently request a handoff for communication, the corresponding base station 20, 30 and the switching center ( 10) There was a problem that the performance of the system is reduced due to the heavy load (Load) concentrated in the location register (15).

An object of the present invention is to provide a call setup method of a terminal for increasing the system processing speed by reducing the system load caused by the terminal in a wireless subscriber network system.

In order to achieve the above object, the present invention provides a subscriber station location registration method of a wireless subscriber network; When the terminal is powered on, preparing a readout of the PEN offset value of the corresponding base station recorded in the internal memory; A comparison process of comparing the PEN offset value read by the preparation process with the PEN offset value of the received base station to determine whether the PEN offset value is the same, and returning the PEN offset value to the preparation process if it is not the same; A call establishment process of requesting, by the terminal, call setup for communication to the base station when the PEN offset value received from the base station determined in the comparison process and the PEN offset value recorded in the memory of the terminal are the same; The communication is performed using the call set up by the call setup process, and at the same time, it is determined whether or not to continue the communication.

1 is a functional block diagram of a general wireless subscriber network,

2 is a flowchart illustrating a method for limiting mobile subscriber network terminals according to the prior art;

3 is a flowchart illustrating a method for limiting mobile subscriber network terminals according to the present invention.

** Explanation of symbols on the main parts of the drawing **

10: exchange bureau 15: location register

20,30: base station 22,32: service area

40,42,50,52: terminal

Hereinafter, a method of restricting movement of a wireless subscriber network terminal according to the present invention will be described with reference to the accompanying drawings.

In order to explain the present invention, FIG. 3 is a flowchart illustrating a method for limiting mobile subscriber network terminals according to the present invention.

Referring to FIG. 3, the method for limiting mobility of a wireless subscriber network terminal according to the present invention includes a nonvolatile memory built in the terminal 40, 42, 50, and 52 when operating power is applied to the terminal. A preparation process (S100) of reading and storing a unique, PN offset value of the base station 20,30, which is recorded and stored;

The terminals 20 and 30 read base station-specific PN offset values output from the base stations 20 and 30 and read from the nonvolatile memory, and are registered to receive the wireless subscriber network service. A comparison process (S110) of comparing the PN offset values of (20,30) to determine whether they are the same value, and returning to the preparation process (S100) in case of non-identical PIN offset values;

In the comparison process (S110), if the PN offset value received from the corresponding base station 20, 30 and the PN offset value read from the nonvolatile memory are the same, the terminal 40, 42 is determined. , 50, 52 is a call setup process (S120) for requesting to establish a communication call (Call) to the base station (20,30),

Communicating using the call (Call) set by the call setup process (S120) (S130), and determines whether the communication is continued or not, and if it does not continue (S140) communication process It consists of.

Hereinafter, the present invention having the above configuration will be described in detail with reference to the accompanying drawings.

The plurality of terminals 40, 42, 50, and 52 may be located in the respective service areas 22 and 32 to receive communication services through the corresponding base stations 20 and 30, thereby providing the wireless subscriber network (WLL). PN received from the base station (30,30) located at the same time reading the unique PN offset value of the corresponding base station (20,30) registered to receive the service from the built-in nonvolatile memory (S100) The offset value is compared with the value read from the memory to determine whether the same value (S110).

The terminals 40, 42, 50, and 52 record and store a PN offset value of a base station fixed and registered to receive a wireless subscriber network (WLL) service in a built-in nonvolatile memory. When the terminal 40, 42, 50, 52 is located in the center of the service area 22, 32 of the base station 20, 30, only one PN offset value of the base station 20, 30 is embedded. To non-volatile memory.

However, the terminal 40, 42, 50, 52 is connected to the base station (20, 30) service area (22, 32) of the base station (20, 30) or the adjacent base station (20, 30) that can be connected to receive the service When located in an area overlapping with the service areas 22 and 32, the adjacent base stations, i.e., the terminal may receive the service of the base station so that the terminals 40, 42, 50, 52 can communicate under the optimal conditions. And 3 to 4 base station 20,30 PN Offset values, which can be stored in the built-in nonvolatile memory.

The terminal 40, 42, 50, 52 determines the PN offset value of the base station 20, 30 located in the comparison process (S110) and the PN offset value read from the built-in nonvolatile memory. If it is not the same, it is located in the service areas 22 and 32 of the base stations 20 and 30 that cannot receive the wireless subscriber network (WLL) service. Therefore, the wireless subscriber network is fed back to the preparation process S100. Do not allow service.

When the PEN offset value received from the base station 20, 30 located in the comparison process (S110) and the PEN offset value read from the memory are the same, the terminals 40, 42, 50, and 52 are presently determined. Since it is registered to receive the wireless subscriber network (WLL) service in the service areas 22 and 32 of the base station 20 and 30, the call setup request is made to the base station 20 and 30 to set up a communication call. (S120).

When a call for communication is established through the call setup process (S120) as described above, the communication proceeds through the terminals 40, 42, 50, and 52 (S130), and it is determined whether the communication continues. (S140) If it is not continued, it ends.

PN Offset values recorded and stored in the respective terminals 40, 42, 50, and 52 are Pseudo Noise (PN) used in a code division multiplex (CDMA) wireless subscriber network (WLL). ) Is an offset value of the signal, which is output from each of the base stations 20 and 30, and each of the base stations 20 and 30 has a unique PN offset value.

In addition, since the terminal of the wireless subscriber network (WLL) is generally a terminal that is fixed and used in one place, there is no necessity of movement, and therefore, it is used in the service area of a specific base station. You can get the service.

However, a terminal located in an outer region of a base station or in a border region with a neighboring base station may request a call setup from a neighboring base station or a handoff for ongoing communication due to a change in radio wave environment.

Therefore, the terminal located in the center of the base station service area as described above may store and store the unique Pien offset value of the base station in the corresponding nonvolatile memory, and the terminal located in the outer border region is adjacent to three to four base stations. All unique PEN offset values must be recorded and stored in the corresponding nonvolatile memory.

When the wireless subscriber network terminal is registered and installed for use, the wireless subscriber network operator directly installs the wireless subscriber network terminal, and records the PN offset value required for the nonvolatile memory built into the terminal. Can be stored.

Therefore, the terminal of the wireless subscriber network according to the present invention having the above configuration determines whether the base station is registered in the terminal itself, and only when the base station is registered, the call setup request for handoff by new or ongoing communication. Therefore, it does not put a load on the base station and the switching center.

In addition, each of the terminals can be easily and fundamentally limited to receive the wireless subscriber network service only in the authorized region.

The present invention having the above configuration has the effect of restricting the CDMA wireless subscriber network terminal from moving to an unauthorized location.

In addition, by reducing the load on the wireless subscriber station base station and the switching center, there is an effect of improving the reliability of the system.

Claims (3)

In the subscriber subscriber location registration method of a wireless subscriber network, When the terminal is powered on, the terminal reads the pien offset value of the base station recorded in the internal memory; A comparison process of comparing the read-and-answer of the Pien offset value read by the preparation process and the received Pien offset value of the base station to determine whether it is the same, and if it is not the same; A call setup process for requesting a call setup for communication from the base station if the peer offset value received from the base station determined in the comparison process and the pien offset value recorded in the memory of the terminal are the same; A wireless subscriber network terminal comprising a communication process for determining whether to continue or not to continue the communication using the call established by the call setup process, and if not, to terminate the communication. How to set up an arc. According to claim 1, The preparation process is a call setup method of a wireless subscriber network terminal, characterized in that for reading the offset value of the plurality of base stations from the internal memory. According to claim 1, And the terminal stores a PEN offset value for base stations serving itself.