KR20040015634A - Method for Accepting Sequential Location Registration to 2G System of Mobile Terminal Subscribed to 2.5G System - Google Patents

Abstract

PURPOSE: A method for sequentially permitting the location registration of mobile stations, belonging to a 2.5G system, to a 2G system in a CDMA communication system is provided to prevent 2.5G system subscribers from registering their locations to a 2G system at the same time and at once in case that an equipment installed in the 2.5G system has a fault or executes a specific task. CONSTITUTION: An MSC(Mobile Switching Center)(130) comprises LRPs(Location Register Processors)(132,134) that execute the functions related to the location registration of mobile stations(110). The first LRP(132) is used for a 2G system, and the second LRP(134) is used for a 2.5G system. In case that a specific base station(120) in the MSC(130) cannot execute the location registration function for the 2.5G system subscribers' mobile stations located within a relevant cell as the base station(120) executes a specific task or something is wrong with an equipment, the base station(120) notifies the MSC(130) of a relevant fact. The first LRP(132) of the MSC(130) sends a signal to control so as to modify a system parameter related to location registration. The base station(120), receiving the system parameter control signal, modifies the system parameter during a regular period in order to prevent 2.5G system subscribers from registering their locations to the 2G system at the same time and at once.

Description

Method for Accepting Sequential Location Registration to 2G System of Mobile Terminal Subscribed to 2.5G System}

The present invention relates to location registration in a code division multiple access (CDMA) communication system. More specifically, when performing a specific operation due to a failure in the equipment installed in the 2.5G system, limit the simultaneous registration of multiple locations of the 2.5G system subscribers to the 2G system, and sequentially position each wireless base station of the 2G system The present invention relates to a method of sequentially allowing location registration from a CDMA communication system allowing registration to a 2G system of a mobile communication terminal subscribed to a 2.5G system.

In recent years, with the rapid development of electronic and communication technology, mobile communication systems or services through mobile communication terminals have also been evolved into various forms such as wireless access methods. Mobile communication systems are classified into time division multiple access (TDMA), frequency division multiple access (FDMA) and CDMA according to a wireless access method.

In particular, the CDMA method is a technology in which the development of technology has been made dramatically since the commercial service is performed in Korea for the first time in the world. Such a mobile communication system includes a mobile communication terminal, a base station (BS) and a mobile switching center (MSC). In addition, the wireless base station includes a base station controller (BSC), a base transceiver station (BTS), a repeater (Cell Enhancer), and the mobile switching center includes a home location register (HLR) and a visitor. It consists of a Visitor Location Register (VLR).

One of the biggest features of the CDMA communication system configured as described above is to guarantee the mobility of the mobile communication terminal. To ensure the mobility of the mobile communication terminal, registration and handoff technologies are used. Developed. Here, the location registration is a mobile communication terminal to inform the mobile switching center of its location (owned wireless base station) and status information from time to time to reduce the load of the CDMA communication system, and increase the reliability of the incoming call of the mobile communication terminal Say work. Various information transmitted from the mobile communication terminal to the mobile switching center are stored and managed in the home location register or the visitor location register of the mobile switching center.

Here, the visitor location register registers and manages location information of the mobile communication terminal located in the system and moves to the jurisdiction, and informs the home location register of the newly acquired location information of the mobile communication terminal. In addition, while storing and managing the information of the mobile communication terminal received from the home location register performs a function to utilize the location control, call processing, external operation processing of the mobile communication terminal.

The home location register receives the location information of the mobile communication terminal from the visitor location register and performs functions such as registration recognition, registration deletion, routing information inquiry, location confirmation, and mobile terminal deactivation.

On the other hand, if the location registration is not well done often, the mobile switching center does not know the location of the mobile communication terminal to find, and thus instructs thousands of wireless base stations nationwide to find the mobile communication terminal at the same time. Is extremely degraded.

Therefore, the operator of the CDMA communication system should appropriately control the parameters related to each location registration function so as to increase the reliability of the incoming call signal of the mobile communication terminal in a range where the increase in the load of the system by frequent location registration is not a problem. .

Currently, CDMA communication systems are second generation (2G) systems represented by IS (Interim Standard) -95A / B with data rates of up to 115Kbps, and IS-95C or CDMA-2000 1X with data rates of up to 307Kbps. 2.5 generation (2.5G) system, which is called coexist. Therefore, the location registration of the mobile communication terminal in the CDMA communication system is classified into 2G system and 2.5G system according to the type of mobile communication terminal.

However, in the actual operation of the CDMA communication system, when a failure occurs in the 2.5G system and a specific task is performed, the location registration may be impossible. Therefore, the 2.5G system subscribers are registered in multiple locations simultaneously with the 2G system. There is a situation. Thus, when the 2.5G system subscribers register the location to the 2G system on a large scale, there is a problem that the stable operation of the 2G system is difficult due to the adverse effect on the operation of the 2G system.

For example, an overload may occur in a communication network that uses a location register processor (hereinafter referred to as an 'LRP') or a No. 7 signaling method, which may cause a fatal adverse effect on the CDMA communication system. Here, LRP is a device installed in the mobile switching center to control the visitor location register for storing the location information for the mobile communication terminal existing in the corresponding area in the mobile switching center. In addition, the No.7 signaling method is a signaling method used in an integrated information communication network (ISDN), an intelligent network (IN), a mobile communication network, a PCS (Personal Communication Service) network, and a broadband communication network. Common Channel Signaling (CCS) recommended by the International Telecommunication Standardization Division (ITU-T) for telecommunication standardization for delivery in the form of a packet.

The simultaneous registration of large-scale, large-scale location registration of 2.5G system subscribers to 2G systems has aggravated adverse effects such as temporary interruption of mobile communication service as the number of 2.5G system subscribers continues to increase.

In order to solve the above problems, the present invention, when a failure occurs in the equipment installed in the 2.5G system or performs a specific task, the simultaneous location registration of 2.5G system subscribers to the 2G system, and the wireless of the 2G system Provided is a method for sequentially allowing location registration of a mobile communication terminal subscribed to a 2.5G system to a 2G system in a CDMA communication system that allows location registration sequentially for each base station.

1 is a schematic block diagram of a communication system for explaining a sequential location registration process of a 2.5G system subscriber to 2G according to an embodiment of the present invention;

2A and 2B are exemplary screens of a position registration control program showing a change in system parameters according to an embodiment of the present invention;

3 is a flowchart illustrating a sequential location registration process of a 2.5G system subscriber to a 2G system according to an embodiment of the present invention.

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

110: mobile communication terminal 120: wireless base station

122: base station transmitter 124: base station controller

130: mobile switching center 132, 134: location registration processor

140: Visitor Location Register 150: Home Location Register

To this end, the present invention, CCDMA including a mobile communication terminal subscribed to the 2.5G system, a wireless base station for transmitting and receiving data with the mobile communication terminal, a mobile switching station having a location registration processor for processing the location registration of the mobile communication terminal A method of sequentially allowing location registration of a mobile communication terminal subscribed to a 2G system to a 2G system in a communication system, the mobile switching center transmitting changed system parameters to one or more of the wireless base stations in which a work request has occurred. Transmitting, by the wireless base station, the changed system parameter received to the mobile communication terminal located in its jurisdiction, the mobile communication terminal receiving the changed system parameter, and the mobile switching center is configured to initiate the operation. The stools changed with Restoring the restored system parameters to their original state, and sequentially transmitting the restored system parameters to one or more of the wireless base stations at regular intervals, wherein the one or more wireless base stations are restored to the mobile communication terminal located in their jurisdiction. 2.5G in the CCDMA communication system, characterized in that the step of transmitting the system parameters and the mobile communication terminal receiving the restored system parameters and at the same time performing the location registration to the 2G system of the wireless base station. Provided is a method for sequentially allowing location registration of a mobile communication terminal subscribed to a system to a 2G system.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

1 is a schematic block diagram of a communication system for explaining a sequential location registration process of a 2.5G system subscriber to 2G according to an embodiment of the present invention.

A communication system according to an embodiment of the present invention is a wireless base station 120 having a plurality of mobile communication terminals 110, a base station transmitter 122, and a base station controller 124, a mobile switching center 130, and a visitor location register 140. ) And home location register 150.

The mobile communication terminal 110 performs a call attempt to the wireless base station 120 and registers its location in the communication network for transmission or reception of a call. The location registration of the mobile communication terminal 110 in such a communication network is performed in various cases. For example, when the power of the mobile communication terminal 110 is turned on or off, and periodically registered every predetermined time, a new area When moving to a certain distance, when moving a certain distance, is forcibly performed by the wireless base station 120, when making or receiving a call, when the wireless base station 120 is changed due to handoff (Handoff) Is performed.

Meanwhile, when the mobile communication terminal 110 registers a location, a call message for transmitting call access information and location registration information to the wireless base station 120 through an access channel, and a call of the wireless base station 120. Respond call response messages are used.

The wireless base station 120 includes a base station transmitter 122 and a base station controller 124. The base station transmitter 122 of the wireless base station 120 receives a parameter message related to location registration transmitted by the mobile communication terminal 110 through an access channel, and receives a message related to location registration transmitted from the wireless controller 124. Transmit to mobile communication terminal 110.

The base station controller 124 transmits information about the system and the network and system parameter messages related to location registration, handoff, power control, etc. through a paging channel in response to the location registration request of the mobile communication terminal 110. Transmit to 110.

Meanwhile, the base station controller 124 performs location registration or call processing of the mobile communication terminal 110 for each communication system. That is, the base station controller 124 is provided with 2G equipment for performing location registration or call processing of subscribers subscribed to 2G and 2.5G equipment for performing location registration or call processing of subscribers subscribed to 2.5G. have. Accordingly, the base station controller 120 transmits a system parameter message to the mobile communication terminal 110 for each of the 2G equipment and the 2.5G equipment.

The mobile switching center 130 receives a parameter related to location registration transmitted through the access channel from the mobile communication terminal 110 to the wireless base station 120 and performs location registration. In addition, the MIN (Mobile Identification Number) and ESN (Electronic Serial Number) message transmitted from the mobile communication terminal 120 and the MIN and ESN stored in the home location register 150 is compared to the corresponding mobile communication terminal 110 is a home switching center To determine whether the subscriber is a subscriber of another exchange or a subscriber.

On the other hand, the mobile switching center 130 is composed of a plurality of subsystems and processors, in particular the LRP performs a function related to the location registration of the mobile communication terminal 110 located in the mobile switching center 130. In the mobile switching center 120 shown in FIG. 1, two LRPs, LRP 1 132 and LRP 2 134, are provided. LRP 1 132 is used for a 2G system, and LRP 2 134 is 2.5. Used for G system. Of course, a plurality of LRPs are used in the actual mobile switching center 130 for each communication system. For convenience of description, one LRP for each communication system will be described as an example.

A specific wireless base station 120 in the mobile switching center 130 may perform a specific operation or may fail to perform a location registration function of the mobile communication terminal 110 subscribed to the 2.5G system located in the cell due to a failure of the equipment. If so, the wireless base station 120 notifies the mobile switching center 130 of the fact. The LRP 1 132 of the mobile switching center 130 then sends a signal to the wireless base station 120 to control the system parameters related to location registration.

Upon receiving the system parameter control signal transmitted from the mobile switching center 130, the wireless base station 120 changes the system parameters related to the location registration for a period of time, thereby preventing the registration of the location of the 2.5G system subscribers to the concurrent multiple 2G system, thereby preventing 2G. Protect your system. When the protection operation of the 2G system is finished, the mobile switching center 130 restores the system parameters to the wireless base station 120 and transmits them, but sequentially transmits the wireless base station 120 with a specific time difference for each operation request.

Allowing sequential location registration through change and recovery of system parameters related to location registration according to an embodiment of the present invention will be described in more detail with reference to FIG. 2.

The home location register 150 receives the location information of the mobile communication terminal 110 from the visitor location register 140 and performs functions such as registration recognition, registration deletion, and location verification. In addition, the home location register 150 uses the location information received from the visitor location register 140 to obtain profile information of the mobile communication terminal 110 from the home location register to which the mobile communication terminal 110 is initially subscribed. Bring Here, the profile information refers to MIN, ESN, registered service information, etc. of the mobile communication terminal 110.

The visitor location register 150 receives and stores the location information of the visited subscriber whose location registration is performed from the mobile switching center 130. That is, according to the present invention, when performing location registration from 2.5G to 2G of the mobile communication terminal 110 subscribed to another mobile switching center, the location information of the mobile communication terminal 110 is registered and managed and moved from the home location register 150. The profile information of the communication terminal 110 is received and stored.

2A and 2B are exemplary screens of a location registration control program illustrating a change in system parameters for simultaneous multiple location registration suppression and sequential location registration allowance of a 2.5G system subscriber to 2G according to an embodiment of the present invention.

Referring to FIG. 1, the wireless base station 120 has a system parameter related to location registration in order to perform location registration of the mobile communication terminal 110. The system parameter described hereafter is a standard used by IS-95 of a CDMA communication system.

According to an embodiment of the present invention, SID_REG, NID_REG, RARM_REG and HOME_REG parameters are changed among a plurality of system parameters related to location registration in order to control simultaneous registration of multiple locations of 2.5G system subscribers to the 2G system.

Here, the four system parameters will be described. The system identification designator (SID) represents a system identifier, and the network identification designator (NID) represents a network identifier. In general, a CDMA mobile communication system has a structure in which an area to which one SID is assigned includes a lower area to which a plurality of NIDs are assigned. That is, CDMA mobile communication systems can be distinguished by (SID, NID). Here, (SID, NID) is called an identifier pair.

Meanwhile, the mobile communication terminal stores a list of one or more identifier pairs, and it is determined whether the corresponding mobile communication terminal is a roaming terminal through comparison with the identifier pair stored in the wireless base station. For example, a mobile communication terminal has a list of three identifier pairs (2, 3), (2, 0), (3, 1), and a wireless base station that manages the area where the mobile communication terminal is located is (2, If it has an identifier pair of 7), the corresponding mobile communication terminal is determined to be a network identifier visiting terminal (Foreign NID Mobile Station). Of course, if the wireless base station has an identifier pair of (4, 0), the corresponding mobile communication terminal is determined as a system identifier visiting terminal (Foreign SID Mobile Station).

On the other hand, if the values of SID_REG and NID_REG are set to 'YES', the mobile communication terminal can automatically perform location registration as a home subscriber or a visiting subscriber to the wireless base station where the mobile communication terminal is located. On the other hand, when the values of SID_REG and NID_REG are set to 'NO', the mobile communication terminal cannot perform location registration with the wireless base station where the mobile communication terminal is located.

In addition, PARM_REG is a parameter used to register a location when specific parameters transmitted through a call channel from a wireless base station to a mobile communication terminal are changed. If the value of PARM_REG is set to 'YES', the mobile communication terminal is automatically located. Registration will be performed. On the other hand, when the value of PARM_ERG is set to 'NO', the mobile communication terminal cannot perform location registration.

Also, HOME_REG is a parameter used to perform home location registration. When HOME_REG is set to 'AUTO', the mobile communication terminal automatically performs home location registration. On the other hand, when the value of HOME_REG is set to 'MANUAL', the mobile communication terminal cannot perform home location registration.

The four SID_REG, NID_REG, RARM_REG, and HOME_REG parameters described so far are defined in the IS-95 standard book and are well known to those skilled in the art, and thus, further description thereof will be omitted.

FIG. 2A illustrates modified system parameters transmitted from a mobile switching center to a corresponding wireless base station when a 2.5G system subscriber requests a location registration to a 2G system.

2A, the base station controller identification codes of the wireless base station for which the 2.5G system subscriber is requested to change the location registration to the 2G system are '03' and '06', and the identification codes of the base station transmitter are '05' and '11'. Able to know. In addition, it can be seen that SID_REG = NO, NID_REG = NO, PARM_REG = NO, and HOME_REG = MANUAL to control location registration. Therefore, the wireless base station corresponding to the identification code '03' of the base station controller and the identification code '05' of the base station transmitter and the wireless base station corresponding to the identification code '06' of the base station controller and the identification code '11' of the base station transmitter are 2.5G. Location registration of the system subscriber to the 2G system is controlled.

On the other hand, the code 'sleep 2' means that the delay time (Delay Time) from one wireless base station location registration control parameter change to a next wireless base station location control parameter change is 2 seconds. Of course, the duration of the location registration control can be changed according to the system.

2B shows the system parameters transmitted from the mobile switching center to the corresponding wireless base station after the 2.5G system subscriber's location registration to the 2G system is controlled for a period of time.

2B, it can be seen that the mobile switching center changed to SID_REG = YES, NID_REG = YES, PARM_REG = YES and HOME_REG = AUTO to perform location registration of the mobile communication terminal. Accordingly, location registration is performed from the wireless base station corresponding to the base station controller number '03' and the base station transmitter number '05'. Then, after a specific time (approximately 5 minutes) has elapsed, location registration of the wireless base station corresponding to the base station controller number '06' and the base station transmitter number '11' is performed.

In addition, the code 'sleep 5' also means that a delay time from one wireless base station location registration control parameter change to a next wireless base station location control parameter change is 5 seconds. Accordingly, it can be seen from FIG. 2B that the 2.5G system subscriber is allowed to register the location to the 2G system at a predetermined time interval (approximately 5 minutes). Here, 5 minutes is determined by the number of base stations to be controlled and the parameter change delay time for each base station, and it is a time required to perform about 30 local wireless base stations in units of 5 seconds.

On the other hand, the control of the location registration described in FIG. 2A is a base station transmitter 122 or a base station controller 124 of the wireless base station 120 in which the system administrator of the mobile switching station 130 cannot perform the location registration function due to a failure or a work request. Is performed by inputting an identification code of s) through the input device. That is, the location registration control button may be selected using the location registration control program installed in the system of the mobile switching center 130, and the identification codes of the specific base station transmitter 122 or the base station controller 124 may be sequentially input. Of course, if the location registration control button is selected, the four system parameters described above are already set to SID_REG = NO, NID_REG = NO, PARM_REG = NO, and HOME_REG = MANUAL.

Similarly, the sequential allowance of location registration described in FIG. 2B is also performed by the system administrator of the mobile switching center 130 selecting the location registration allowance button using the location registration control program. Of course, since the identification code of the base station transmitter 122 or the base station controller 124 to control the location registration has already been entered in Figure 2a, it is not necessary to enter this identification code again. Of course, if the location registration control button is selected, the four system parameters described above are already set to SID_REG = YES, NID_REG = YES, PARM_REG = YES and HOME_REG = AUTO.

3 is a flowchart illustrating a sequential location registration process of a 2.5G system subscriber to a 2G system according to an embodiment of the present invention.

If a specific operation is performed in the 2.5G system of the CDMA communication system or a failure occurs in the equipment installed in the 2.5G system, the 2.5G system operation room notifies the fact to the 2G system operation room (S302). In this case, the notification of the fact is preferably made immediately when the failure occurs in the 2.5G system, and at least 5 minutes before the start of work if it is necessary to perform work in the 2.5G system.

The mobile switching center 130 changes the four system parameters changed to the wireless base station 120 corresponding to the identification code of the base station transmitter 122 or the identification code of the base station controller 124 inputted by the system administrator using the location registration control program. It transmits (S304). Here, four system parameters and their setting values transmitted from the mobile switching center 130 to the wireless base station 120 are SID_REG = NO, NID_REG = NO, PARM_REG = NO, and HOME_REG = MANUAL.

The wireless base station 120 receives the four system parameters transmitted from the mobile switching center 130 and transmits the four system parameters to all mobile communication terminals 110 subscribed to the 2.5G system in its area through the call channel. It transmits (S306).

The mobile communication terminal receives four system parameters transmitted through the call channel from the wireless base station 120 and stores them in the memory area (S308).

The wireless base station 120 starts a specific operation in the 2.5G system (S310). Here, the specific task includes all kinds of tasks that make location registration of the 2.5G system impossible. The wireless base station 120, which initiates a specific task, cannot perform location registration of the mobile communication terminals 110 subscribed to the 2.5G system among the mobile communication terminals 110 located in the jurisdiction. Accordingly, the mobile communication terminals 110 subscribed to the 2.5G system automatically attempt to perform location registration with the 2G system, but do not perform location registration with the 2G system by the four system parameters received and stored in step S308. can not do it.

Immediately after the start of the operation, the system operator of the mobile switching center 130 changes the four system parameters to SID_REG = YES, NID_REG = YES, PARM_REG = YES and HOME_REG = AUTO.

The mobile switching center 130 transmits the four system parameters that have been changed to their original state by the corresponding wireless base station 120 at regular intervals (S314).

The wireless base station 120 receiving the four original system parameters transmitted from the mobile switching center 130 transmits the original four system parameters to the mobile communication terminal 110 of the 2.5G system subscribers located in the jurisdiction. (S316).

The mobile communication terminal 110 receives and stores four system parameters transmitted from the wireless base station 120, and performs location registration with the 2G system of the wireless base station 120 (S318).

The LRP 1 132 of the mobile switching center 130 receives the location information of the mobile communication terminal 110 from the wireless base station 120 and transmits the mobile communication terminal 110 to the visitor location register 140 or the home location register 150. By registering the profile information of the location registration of the mobile communication terminal 110 is completed (S320).

The above description is merely illustrative of the present invention, and those skilled in the art to which the present invention pertains may various modifications without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed herein are not intended to limit the present invention but to describe the present invention, and the spirit and scope of the present invention are not limited by these embodiments. It is intended that the scope of the invention be interpreted by the following claims, and that all descriptions within the scope equivalent thereto shall be construed as being included in the scope of the present invention.

As described above, according to the present invention, it is possible to contribute to the stable operation of the 2G system by suppressing the overload of the location registration processor which is generated when the subscriber registers the location simultaneously with the 2G system during the operation of the conventional 2.5G system. .

In addition, by allowing the plurality of wireless base stations to sequentially register the location of the subscribers during the operation of the 2.5G system, it is possible to prevent the communication service interruption caused by the overload of the conventional location registration processor to contribute to the stable use of the communication service for the subscribers of the 2G system.

Claims (10)

In a CDMA communication system including a mobile communication terminal subscribed to a 2.5G system, a wireless base station for transmitting and receiving data to and from the mobile communication terminal, and a mobile switching center having a location registration processor (LRP) for processing location registration of the mobile communication terminal. In the sequential allowance method of location registration of 2G mobile communication terminal to 2G, (a) the mobile switching center transmitting modified system parameters to one or more of the wireless base stations from which the work request occurred; (b) at least one of the wireless base stations transmitting the changed system parameters received to the mobile communication terminal located within its jurisdiction; (c) the mobile communication terminal receiving the changed system parameter; (d) the mobile switching center recovers the changed system parameter changed with the start of the operation to its original state, and sequentially transmits the restored system parameter to one or more of the wireless base stations at regular intervals; (e) at least one of the wireless base stations transmitting the restored system parameters to the mobile communication terminal located within its jurisdiction; And (f) the mobile communication terminal receiving the restored system parameter and simultaneously performing the location registration with the 2G system of the wireless base station; The control method of the location registration to the 2Ｇ of 2.5Ｇ subscribers in a CDMA communication system comprising a. The method of claim 1, wherein in step (a) The system parameters are SID_REG, NID_REG, PARM_REG, and HOME_REG defined in the IS-95 standard. The method of sequentially allowing location registration of a mobile communication terminal subscribed to a 2.5G system to a 2G system. The method according to claim 1 or 2 The changed system parameters are SID_REG = NO, NID_REG = NO, PARM_REG = NO, and HOME_REG = MANUAL. The method of claim 1, Changing and restoring the system parameters are performed through a location registration control program installed in a computer provided in an operating room of the 2G system, from a CDMA communication system to a 2G system of a mobile communication terminal subscribed to a 2.5G system. How to allow sequential registration. The process of claim 1, wherein in step (C) The mobile communication terminal stores the changed system parameters in a memory device and converts them to a state in which the location registration with the 2G system cannot be performed. Method of sequentially allowing location registration of a communication terminal to a 2G system. The method of claim 1, wherein in step (d) The restored system parameters are SID_REG = YES, NID_REG = YES, PARM_REG = YES, and HOME_REG = AUTO. . The method of claim 1, wherein in step (d) The predetermined period is a period of time required for completing the location registration of all the mobile communication terminals subscribed to the 2.5G system in the one wireless base station to the 2G system subscribed to the 2.5G system in the CDMA communication system Method of sequentially allowing location registration of a mobile communication terminal to a 2G system. The method of claim 7, wherein And the period is 5 minutes. The method of sequentially allowing location registration of a mobile communication terminal subscribed to a 2.5G system to a 2G system in a CDMA communication system. The method of claim 1, wherein in step (d) In the CDMA communication system, the mobile switching center transmits the restored system parameters in the order in which the work request is received from at least one wireless base station by using the base station transmitter and base station controller identification code of the wireless base station. A method of sequentially allowing location registration of a mobile communication terminal subscribed to a G system to a 2G system. The method of claim 1, wherein in step (f) The location registration processor receives the location information of the mobile communication terminal from the 2G system of the wireless base station and completes the location registration by registering in a visitor location register or a home location register 2.5G system in the CDMA communication system A method of sequentially allowing location registration of a mobile communication terminal subscribed to a 2G system.