KR101169905B1 - Method for providing mobile station registration in a mobile communication system - Google Patents

Abstract

The present invention relates to a method for registering a mobile communication terminal in a mobile communication system, the method comprising: determining a channel slot using a hashing function, delaying a predetermined time for each determined slot number, and then registering a location and a state for a wireless access network And transmitting a parameter change registration message to a slot mode from a non-slot mode when a registration acceptance instruction message is received from a wireless access network. By delaying registration by slot number at the time, problems such as delay of registration procedure, failure of registration, increase of incoming / outgoing failure rate, and deterioration of call quality of the corresponding base station that can occur when multiple mobile communication terminals simultaneously register location are eliminated. There is an advantage.

Hashing Function, Frequency Allocation, Position Registration

Description

How to register a mobile communication terminal in a mobile communication system {METHOD FOR PROVIDING MOBILE STATION REGISTRATION IN A MOBILE COMMUNICATION SYSTEM}

1 is a block diagram showing the configuration of a mobile communication system to which the present invention is applied;

2 is a flowchart illustrating a registration method of a mobile communication terminal according to the present invention.

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

110: mobile communication terminal 120: wireless access network

121: base station transmitter 123: base station controller

130: mobile switching center 140: home location register

The present invention relates to a registration method of a mobile communication terminal in a mobile communication system. When a mobile communication terminal registers a location in a boundary area of a mobile switching center, it delays by slot number and performs registration. The present invention relates to a method for registering a mobile communication terminal in a mobile communication system.

In the mobile communication system, the simplest method of locating the mobile communication terminal is to locate the mobile communication terminal by transmitting a paging signal to the entire service area and receiving a response signal from the mobile communication terminal. In this case, the paging load increases because every time an incoming call is sent to the mobile terminal, paging must be attempted for the entire service area.

Therefore, in order to reduce such paging load, when the position of the mobile communication terminal is changed by the movement of the mobile communication terminal, the location information must be reported to the mobile communication system. This procedure is called location registration.

This number of location registrations has a trade-off with paging load. When the base station is registered whenever the base station changes, only one base station needs to be paged, so the paging load is very small, but the location registration occurs very frequently.

On the other hand, if a wide area that can be moved without a location registration procedure is rare, location registration rarely occurs, but the number of base stations to be paged in one paging increases and the paging load increases.

In the conventional location registration method, the service area is divided into several fixed location registration areas, and whenever the location registration area is changed, it is determined whether the mobile communication terminal has entered the new area by analyzing the area identification number received from the base station.

If entering the new area, the mobile communication terminal registers its location and reports its location information to the system.

However, according to the conventional location registration method, if a plurality of mobile communication terminals simultaneously perform location registration for one Factory Assignment (FA) base station in the boundary area of a mobile switching center (MSC), registration is required. Time may be excessively increased or registration may be failed, and a call / call failure rate may be increased, and the base station may also affect neighboring subscribers due to an instantaneous noise increase, thereby reducing call quality.

For example, the maximum number of passengers on a high-speed train, KTX, is about 935. Of these, when more than 20 persons register simultaneously with one FA base station in the border area of the mobile switching center, the registration process takes an average of 2-3 seconds. It is delayed by more than 10 seconds, and the rate of incoming / outgoing calls due to registration is increased, and the quality of the base station is reduced to 90% or less due to the instantaneous noise increase.

The present invention has been proposed to solve such a conventional problem. When the mobile communication terminal performs location registration in the boundary area of the mobile switching center, registration is delayed for each slot number so that a plurality of mobile communication terminals simultaneously register the location. The purpose is to solve problems such as delay in registration procedure, failure of registration, increase of incoming / outgoing failure rate, and deterioration of call quality of the base station.

In the mobile communication system according to the present invention for realizing the above object, a method of registering a mobile communication terminal uses a hashing function as a method of registering its position and state in a wireless access network in a mobile communication terminal belonging to the mobile communication system. Determining a channel slot, transmitting a parameter change registration message to a wireless access network to register a position and a state after delaying the determined slot number for a predetermined time, and receiving a registration acceptance indication message from the wireless access network. Transitioning from nonslot mode to slot mode.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a block diagram showing the configuration of a mobile communication system to which the present invention is applied.

The mobile communication system according to the present embodiment includes a mobile communication terminal 110, a wireless access network 120, a mobile switching center 130, a home location register 140, and the like.

The mobile communication terminal 110 is a terminal capable of voice communication and data communication with the other party through a mobile communication network, and generates a corresponding call when a user inputs a phone number for a voice call. In addition, the channel slot is determined by using a hashing function, and after delaying for a predetermined time according to the determined slot number, it registers its position and state with the wireless access network 120.

The radio access network 120 serves to guarantee the mobility of the mobile communication terminal 110 and performs handover and radio support management functions. The radio access network 120 includes a base station transmitter 121 and a base station controller 123 and supports both synchronous and asynchronous. In this case, the base station transmitter 121 will be a base transceiver station (BTS), the base station controller 123 will be a base station controller (BSC), and in the case of asynchronous, the base station transmitter 121 is a radio transceiver subsystem (RTS). The base station controller 123 may be a radio network controller (RNC). Of course, the wireless access network 120 is not limited thereto, and may include a GSM network other than a CDMA network and an access network of a fourth generation mobile communication system to be implemented in the future.

The base station transmitter 121 receives a call request signal from the originating mobile communication terminal 110 through a traffic channel of the signal channel, and transmits the received call request signal to the base station controller 123. In addition, the base station transmitter 121 is a network endpoint device that is directly connected to the mobile communication terminal 110 by performing baseband signal processing, wired and wireless conversion, and transmission and reception of a wireless signal.

The base station controller 123 controls the base station transmitter 121, assigns and releases radio channels to the mobile communication terminal 110, controls transmission output of the mobile communication terminal 110 and the base station transmitter 121, and inter-cell soft handover. And determining hard handover, transcoding and vocoding, global positioning system (GPS) clock distribution, and operation and maintenance functions for the base station. The base station controller 123 transmits the call request signal received through the base station transmitter 121 to the mobile switching center 130.

The mobile switching center 130 performs basic and additional service processing, incoming and outgoing call processing of a subscriber, location registration and handover procedures of the mobile communication terminal 110, and interworking with other networks. Mobile switching center 130 is an access switching subsystem (ASS) that performs distributed call processing, an INS (Interconnection Network Subsystem) that performs centralized call processing, and centralization of operation and maintenance. Subsystem such as a Control Subsystem) and a Location Registration Subsystem (LRS) for storing and managing information on a mobile subscriber.

The home location register 140 receives the location information of the incoming mobile communication terminal 110 and performs functions such as registration recognition, registration deletion, and location checking. In addition, the home location register 140 stores profile information of the originating and terminating mobile communication terminal 110. Here, the profile information refers to MIN, ESN, subscribed mobile communication service information, call forwarding service setting information, etc. of the mobile communication terminal 110.

The location registration procedure of the mobile communication terminal implemented in the mobile communication system configured as described above will be described with reference to FIGS. 1 and 2.

First, the mobile communication terminal 110 determines a channel slot by using a hashing function (S201), and delays (S203) for a predetermined time for each determined slot number (S203), and then registers its location and state with the wireless access network 120. A parameter change registration message is transmitted to the base station transmitter 121 of step S205. In this case, it is preferable to delay the delay by 100ms to 2000ms per slot, and the registration procedure should be performed sequentially according to the slot number. As a result, a plurality of mobile communication terminals 110 do not simultaneously perform location registration for one FA base station in the boundary area of the mobile switching center 130.

Then, the base station transmitter 121 transmits the parameter change registration message transmitted from the mobile communication terminal 110 to the base station controller 123, and the base station controller 123 allocates a paging channel with the mobile communication terminal 110. Afterwards, the registration acceptance indication message is transmitted to the mobile communication terminal 110 through the allocated paging channel (S207). In addition, the base station controller 123 transmits a registration message to the mobile switching center 130 (S209).

The mobile communication terminal 110 receiving the registration acceptance instruction message from the wireless access network 120 switches from the non-slot mode to the slot mode (S211).

On the other hand, when the registration message is transmitted from the wireless access network 120, the mobile switching center 130 checks whether the corresponding telephone number is a service registration number, and in the case of the service registration number, the mobile communication terminal 110 indicates the location and state of the mobile communication terminal 110. Register with the register 140 to enable the incoming call. However, when the service registration number is not the same, the registration rejection indication message is transmitted to the corresponding mobile communication terminal 110 through the wireless access network 120. At this time, the paging channel must transmit a registration rejection indication message in the slot mode.

The above description is merely illustrative of the present invention, and it is obvious that the techniques of the present invention can be easily modified and implemented by those skilled in the art. Such modified embodiments should be construed as naturally included in the technical spirit described in the claims of the present invention.

As described above, according to the present invention, registration is delayed by slot number when the mobile communication terminal performs location registration in the border area of the mobile switching center, and thus registration may occur as a plurality of mobile communication terminals simultaneously perform location registration. Problems such as delay in procedure, registration failure, increase of incoming / outgoing call rate, and deterioration of call quality of the base station can be solved.

Claims (3)

A method of registering a location and a state of a mobile communication terminal belonging to a mobile communication system to a wireless access network, Determining a channel slot using a hashing function, Transmitting a parameter change registration message to the wireless access network in order to register the location and state after a delay for a predetermined time for each determined slot number; Switching from a non-slot mode to a slot mode when a registration acceptance instruction message is received from the wireless access network. Registering method of a mobile communication terminal in a mobile communication system comprising a. The method of claim 1, In the registration method, a plurality of mobile communication terminals belonging to the mobile communication system sequentially perform a registration procedure by transmitting the registration message according to the slot number. A registration method of a mobile communication terminal in a mobile communication system, characterized in that. The method of claim 1, In the registration method, the delay time per slot is 100ms to 2000ms. A registration method of a mobile communication terminal in a mobile communication system, characterized in that.

Images