KR20010059673A - Subscriber authentication method in mobile telecommunication system - Google Patents

Abstract

PURPOSE: A subscriber authentication method for a mobile communication system is provided so that subscriber authentication can be precisely performed by demanding detailed service information of subscribers and providing a service of the subscribers according to a service authentication message. CONSTITUTION: When a mobile switching center receives a subscriber authentication request from a base station controller, the mobile switching center transmits an authentication request message to a home location register(200). The home location register reads information of the subscriber and distinguishes the subscriber. When the subscriber is a normal subscriber, the home location register transmits a response data notifying that the subscriber is available to the mobile switching center(210). The mobile switching center transmits the response data to the corresponding base station controller. When the mobile switching enter receives a register notification message, the mobile switching center requests detailed service authentication information of the subscriber to the home location register(220). Thereafter, when the mobile switching center receives a detailed service authentication response message, the mobile switching center transmits the message to the corresponding base station controller, and performs a service of the subscriber according to the message(230).

Description

Subscriber authentication method in mobile communication system {SUBSCRIBER AUTHENTICATION METHOD IN MOBILE TELECOMMUNICATION SYSTEM}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to subscriber authentication at a mobile switching center, and more particularly to a method for accurately authenticating mobile subscribers and finding out defective subscribers.

Typically, a mobile communication system is a transmission station (BTS: Base Station Transceiver (BTS): 140, 141, .... 149) connected to a plurality of subscribers as shown in FIG. The base station 130 (BSC: Base Station Controller: hereinafter referred to as "base station") transmits and receives signals directly, and the transmitting station (140, 141, .... 149) and the switching center (MSC: Mobile Switching Center: hereinafter referred to as "exchange station"). This is connected to 120). The base station 130 performs a handoff by controlling a plurality of transmitting stations and transmits a message input from the switching center 120 to the transmitting stations 140, 141, .... 149. Switching station 120 performs the overall control of the mobile communication system and controls a plurality of base stations 130, when the subscriber authentication is required from the base station 130 to the HLR (100: Home Location Register: referred to as "HLR") Perform an operation on the subscriber authentication request.

The subscriber authentication requires subscriber authentication to the switching center 120 when a new subscriber registers with the base station 120 or there is a subscriber registered by being handed off from another base station. For example, when the user of the terminal turns on the power of the terminal which is turned off or the base station 120 is changed by the handoff, a new registration procedure is performed. In such a situation, the switching center 120 checks whether the corresponding subscriber is a valid subscriber and notifies the corresponding base station 130 through the HLR 100. At this time, the conventional subscriber authentication is performed only for the matter that the system is set. That is, in the system in which authentication is set up for origination, authentication for origination is performed, and in the system in which authentication for reception is set up, only authentication of reception is performed. Therefore, there is a problem that the overall subscriber authentication is impossible. For example, when a subscriber whose service is only called is registered as a system that authenticates only outgoing calls, the system authenticates only outgoing calls, so users who want to register cannot use the system or receive unfair charges when call forwarding or outgoing calls are made. There was this.

In addition, when a subscriber requesting only outgoing and incoming calls registers in a system for authenticating only outgoing calls, the system does not know the details of authentication such as incoming or forwarding calls, and thus there is a problem that accurate service is impossible.

The authentication control flow between the base station and the HLR defined in the IS-41D has no parameter indicating the type of authentication service (incoming, outgoing, registration, and flash) to be provided for each subscriber. It was determined in system units via internal parameters. Therefore, it could not flexibly provide the authentication service desired by the user, and could not perform an operation for strengthening the authentication of the suspected bad subscriber.

Accordingly, an object of the present invention is to provide a method for performing accurate authentication in subscriber authentication.

In order to achieve the above object, the present invention provides a subscriber authentication method in an exchange station of a mobile communication system, in which there is an authentication request for whether the subscriber is a valid subscriber according to the registration of the subscriber, the subscriber authentication request to the HLR according to the authentication request. Transmitting a message, transmitting authentication data received by the authentication request message to a corresponding base station, requesting detailed service authentication information from the HLR if the subscriber is a valid subscriber according to the authentication data; And transmitting the detailed service authentication response message received by the request to the corresponding base station and performing the service of the subscriber according to the response message.

1 is a schematic structural diagram of a mobile communication system according to an embodiment of the present invention.

2 is a control flowchart for subscriber authentication in an HLR according to an embodiment of the present invention.

3 is a control flowchart for subscriber authentication according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Specific details appear in the following description, which is provided to aid a more general understanding of the present invention, and it should be understood by those skilled in the art that the present invention may be practiced without these specific details. It will be self explanatory. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a schematic structural diagram of a mobile communication system according to an embodiment of the present invention.

2 is a control flowchart for subscriber authentication in an HLR according to an embodiment of the present invention.

3 is a control flowchart for subscriber authentication according to an embodiment of the present invention.

Referring to FIG. 1, a schematic configuration of a mobile communication system according to an embodiment of the present invention will be described below.

The transmitting stations 140 ?? 141, ... 149 are connected to a plurality of subscribers on the air, and directly transmit and receive signals to and from the terminal 150, and the base station 130 transmits signals to the transmitting stations 140, 141, 149) and the exchange office (120). Switching station 120 performs the overall control of the mobile communication system and controls a plurality of base stations 130, and performs the operation for the subscriber authentication request to the HLR 100 when subscriber authentication is required from the base station 130. The HLR 100 has subscriber information, and the subscriber information has a telephone number and information such as personal information of the subscriber and service contents requested by the user. The service contents include information on incoming and outgoing calls, and additional service usage information on other call forwarding or use of voice mail. In general, the subscriber authentication request is made when the switching center 100 changes due to the movement of the user or when the user turns the power on again while the user turns off the terminal.

Hereinafter, an operation according to an embodiment of the present invention will be described with reference to FIG. 2. In step 200 of FIG. 2, the switching center 120 transmits an authentication request message to the HLR 100 when the subscriber authentication request is received from the base station 130 according to the above-described situation. At this time, the HLR 100 reads the information of the subscriber and checks whether the subscriber is a valid subscriber. If the subscriber is not a bad subscriber and is a normal subscriber, the HLR 100 transmits response data indicating that the subscriber who requested authentication to the switching center 120 is a valid normal subscriber (step 210). The switching center 120 then transmits the response data to the base station 130. The subscriber transmits the response message with the data indicating that the subscriber is a defective subscriber at the time of the defective subscriber.

Thereafter, if a REGNOT (REGISTER NOTIFICATION) message is received by the exchange in step 220, the exchange 120 requests the HLR 100 for detailed service authentication information for the corresponding subscriber. At this time, the HLR 100 retrieves the detailed service authentication data of the corresponding subscriber, reads out the service authentication information of the corresponding subscriber, and transmits a response message to the switching center 120. In this case, the response message transmitted may be configured as shown in the following table.

G F E D C B A OCTET FLASH TERM ORIG REG

In the table, "REG" indicates location registration, "ORIG" indicates origination, "RERM" indicates incoming service, and "FLASH" indicates additional services such as call forwarding. The above table is an example and may be added by increasing the service. By writing "0" or "1" in each bit in the table, the subscriber can indicate whether or not the service corresponding to each bit is used. That is, when "1" is "B" in "B" of the above table, it can be seen that the subscriber is available for outgoing service.

When the detailed service authentication response message is received by the switching center 120, the switching center 120 transmits the received message to the base station, and performs the service of the corresponding subscriber according to the received message.

3 shows another embodiment according to the present invention, which is similar to the operation of FIG. 2 and will be described in detail below.

In step 300 of FIG. 3, the base station 120 transmits an AUTHENTICATION INDICATOR REQUEST message to the HLR 100 when there is a registration request by the subscriber's registration. The HLR 100 receiving the message reads the subscriber's information, checks whether the subscriber is a valid subscriber, and transmits the response message (AUTHENTICATION INDICATOR REQUEST []) to the switching center 120. The exchange 120 receiving the message transmits a response message to the base station 130, and transmits a REGISTRATION NOTIFICATION message to the HLR 100 when the subscriber is a valid subscriber. The HLR 100 receiving the message reads the detailed service information of the corresponding subscriber and transmits a REGISTRATION NOTIFICATION RETURN RESULT message to the switching center according to the service authentication data of the corresponding subscriber. The message may be configured as shown in the table.

Briefly, the present invention is as follows.

When a subscriber's request for registration occurs, the exchange shall check and notify the validity of the subscriber to the HLR, and if the subscriber is a valid subscriber, request the service details of the subscriber and request the subscriber's registered service according to the detailed service authentication message received. Perform the service.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the claims below, but also by the equivalents of the claims of the present invention.

As described above, in the present invention, when a registration request situation of a subscriber occurs, the exchange office checks and informs the validity of the subscriber to the HLR, and if the subscriber is a valid subscriber, requests detailed service information of the subscriber and receives detailed service authentication. By performing the service of the registered subscriber according to the message, it is possible to perform the correct authentication at the time of subscriber authentication in the mobile communication system.

Claims (4)

In the subscriber authentication method in an exchange station of a mobile communication system, Transmitting a subscriber authentication request message to the HLR according to the authentication request if there is an authentication request for whether the subscriber is a valid subscriber according to the registration of the subscriber; Transmitting the authentication data received by the authentication request message to the corresponding base station; Requesting detailed service authentication information from the HLR if the subscriber is a valid subscriber according to the authentication data; Transmitting a detailed service authentication response message received by the request to a corresponding base station and performing a service of the subscriber according to the response message. The method of claim 1, wherein the registration of the subscriber, Characterized in that the user turns on the terminal or changes the registered switching center. The method of claim 1, wherein the detailed service authentication response message, And service authentication data of the incoming and outgoing, the forwarding, and the waiting. The method of claim 1, wherein the detailed service authentication response message, A parameter marked as active or deactive according to each independent service.