KR100273974B1 - Method for request and response subscriber information in cellular system - Google Patents

Abstract

Disclosed is a subscriber information request and response method in a cellular system. In a mobile switching center that connects a mobile subscriber to another mobile subscriber or another network and obtains subscriber information from the visitor locator, and a home locator that passes subscriber information to the visitor locator of the mobile switching center, the mobile switching center moves to the home locator. When the subscriber's telephone identification number (MIN) is passed and the subscriber's information is requested, the home locator retrieves the subscriber information from the subscriber database using the telephone identification number and passes the retrieved subscriber information to the mobile switching center. The location register delivers the mobile serial number of the mobile subscriber to the mobile switching center.

Description

Subscriber Information Request and Response Method in Cellular System

The present invention relates to a subscriber information request and response method in a cellular mobile telecommunication system. In particular, a mobile switching center (MSC) including a visitor location registrator (VLR) is a home location. The present invention relates to a method of requesting a home location registrator profile information of a mobile subscriber, in particular, qualification information, and responding to the subscriber's information.

The cellular mobile communication system divides the entire service area into a plurality of base station areas and constitutes cells, which are small service areas, and centrally controls these base stations to the mobile switching center so that subscribers can continue to talk while moving between cells. Make sure

1 illustrates a structural diagram of a cellular system using Code Division Multiple Access (CDMA) technology. As shown, a base station (BS) 20, 30, 40, which provides mobile communication service to a mobile telephone (MT) 10, and a plurality of base stations are connected to a public switched telephone network ( It consists of a Mobile Switching Center (MSC) 50 that connects to a Public Switched Telephone Network (PSTN) 60. The mobile switching center obtains information about the subscriber from the Home Location Register (HLR) 52 and the Visitor Location Register (VLR) 54 to process the subscriber's call.

The mobile telephone 10 registers its location with the mobile switching center 50 periodically or as needed. When the mobile telephone requests location registration, the mobile switching center requests the subscriber information of the mobile telephone from the home location register 52, which is a database stored in the subscriber information of the mobile telephone. When the home locator responds with subscriber information, the mobile switching center stores the subscriber information in a visitor locator 54, which is an internal database. The mobile switching center uses the subscriber information stored in the visitor locator to process the call of the mobile telephone. The subscriber information includes additional services, etc. in which the subscriber is registered.

In a code division multiple access system, the mobile switching center includes one visitor locator each. The home location register consists of a system independent of the mobile switching center and stores subscriber information of mobile telephones registered with several mobile switching centers. The mobile switching center communicates with the home locator via the IS-41C.

The mobile switching center requests the subscriber's profile from the home locator using the entitlement message. 2 illustrates a format of a qualification request message according to the prior art. As shown, the qualification request message according to the prior art includes an electronic serial number (ESN), a mobile identification number (MIN) (phone number of the mobile phone) and a qualification code of the mobile phone. Information code) and the System My Type Code of the mobile switching center sending the message.

The home location register conveys the profile information of the subscriber as a Qualification Request Return Result Message. 3 illustrates a format of a qualification response message according to the prior art. As shown, the prior art entitlement message essentially includes only the system type code of the home location register sending the message. The home locator retrieves subscriber information using the subscriber identification number (MIN) included in the qualification message. That is, the home location register may retrieve the subscriber information even without the electronic serial number. However, there is a problem that the length of the message increases because the qualification request message according to the prior art includes an unnecessary electronic serial number.

As mentioned above, the entitlement message essentially includes the subscriber's electronic serial number. However, if a message is lost in the location registration process with the mobile phone, the visitor location register does not receive the subscriber information of the mobile phone from the home location register. The mobile switching center then cannot know the electronic serial number of the mobile telephone attempting the call. Therefore, the mobile switching center must proceed with the call without subscriber information of the mobile telephone.

In addition, if a system operator operating a mobile switching center wants to know information about a particular subscriber, and the information on that subscriber is not available in the visitor locator, the mobile switching center must send a qualification message to the home locator to request the subscriber information. . However, there was a problem that the mobile switching center could not send a qualification request message because it did not know the subscriber's serial number.

The present invention has been made to solve the problems of the prior art operating as described above, when the mobile switching center does not know the subscriber's electronic serial number, in the cellular system, which can request the subscriber's information from the home location register; It aims to provide subscriber information request and response method.

Another object of the present invention is to provide a subscriber information request and response method in a cellular system that can request a subscriber's information from a home location register when the subscriber's information is not stored in the mobile switching center.

Another object of the present invention is to provide a subscriber information request and response method in a cellular system in which a home location register can transmit an electronic serial number of a subscriber to a mobile switching center when the subscriber's information is not stored in the mobile switching center. .

Other objects and advantages of the present invention will become more apparent from the following detailed description of the invention and the accompanying drawings.

1 is a structural diagram of a cellular system using a code division multiple access technique.

2 is a format of a qualification message according to the prior art.

3 is a format of a qualification response message according to the prior art.

4 is a format of a qualification message according to the present invention.

5 is a format of a qualification response message according to the present invention.

6 is a flowchart showing a subscriber information request and response method of a mobile switching center according to the present invention;

<Explanation of symbols for main parts of drawing>

10: mobile phone 20, 30, 40: base station

50: mobile switching center 60: public switched telephone network

A preferred embodiment of the subscriber information request and response method in the cellular system according to the present invention, which is designed to achieve the above object, is to obtain subscriber information from a visitor locator by connecting a mobile subscriber to another mobile subscriber or another network. In a mobile location exchange and a home location register for delivering subscriber information to the visitor location register of the mobile exchange,

A requesting step for the mobile switching center to convey the mobile subscriber's telephone identification number (MIN) to the home locator;

A search step wherein the home locator retrieves subscriber information from the subscriber database using the telephone identification number; And

And a home location registrar forwarding the retrieved subscriber information to the mobile switching center.

In an embodiment of the invention, the step of responding preferably further comprises the step of the home location register delivering the mobile serial number of the mobile subscriber to the mobile switching center.

A preferred embodiment of the method for requesting subscriber information in a cellular system according to the present invention is a mobile switching center which connects a mobile subscriber to another mobile subscriber or another network and obtains the subscriber information from the visitor locator, and the subscriber information to the visitor locator of the mobile switching station. In the home location register to deliver,

The mobile switching center or visitor locator forwarding the telephone identification number to the home locator;

The mobile switching center or visitor locator forwarding the subscriber's credentials to the home locator; And

The mobile switching center or visitor locator transfers the system type code to the home locator.

A preferred embodiment of the method for requesting subscriber information in a cellular system according to the present invention is to connect a mobile subscriber to another mobile subscriber or another network, and if the visitor locator does not have information about a specific subscriber, request a message to the home locator. For a mobile switching center that sends a request for information about a subscriber,

And sending a qualification request message comprising a field indicating a mobile subscriber's telephone identification number (MIN), a field indicating a credential information code of the credential request message and a field indicating a type code of the system, to the home location register.

A preferred embodiment of the subscriber information response method in the cellular system according to the present invention is an entitlement response including information on a subscriber when a mobile switching center connecting the mobile subscriber to another mobile subscriber or another network requests information on a specific subscriber. In a home location register that sends a message to a mobile switching center,

And sending a credential response message consisting of a field indicating the type code of the system and an electronic serial number (ESN) of the mobile subscriber to the mobile switching center.

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. Terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the specification.

The present invention is directed to a method in which a mobile switching center requests information about a subscriber from a home locator when the visitor locator of the mobile switching center does not have information about the subscriber. The present invention deletes the electronic serial number field from the entitlement message sent by the mobile switching center to the home location register. 4 shows a qualification request message according to the present invention. As shown, the qualification request message according to the present invention essentially includes only the telephone identification number and the qualification information code and the system type code.

The qualification message includes an optional field, such as a qualification message according to the prior art, in addition to a field included as an essential part.

If the system operator wants to know the information of a particular subscriber, the mobile switching center sends the entitlement message containing the telephone identification number to the home locator to request the subscriber's information. At this time, the home location register may include the subscriber's electronic serial number in the qualification response message sent to the mobile switching center. The system operator can know the subscriber's electronic serial number from the entitlement response message. 5 shows a qualification response message according to the present invention. As shown, the entitlement response message according to the present invention essentially includes a system type code and an electronic serial number.

The credential message includes an optional field such as a credential message according to the prior art, in addition to a field included as an essential part.

6 is a flowchart showing a subscriber information request and response method of a mobile switching center according to the present invention. Hereinafter, with reference to the accompanying drawings will be described in detail the operating principle of the preferred embodiment of the present invention.

If the visitor locator 54 does not have the information of the particular subscriber, in step s110, the mobile switching center 50 sends a qualification message including the telephone identification number (MIN) to the home locator 52. Ask for subscriber's information. This entitlement message essentially includes a telephone identification number (MIN), a Qualification Information Code (QUALCODE) and a System Type Code (MYTYP). In step S120, the home location register searches the subscriber database using the phone identification number included in the qualification request message, and in step S130, sends a qualification response message including the found subscriber information to the mobile switching center. The home location register includes the subscriber's Electronic Serial Number (ESN) in the entitlement response message. The response message essentially includes a system type code (MYTYP) and an electronic serial number (ESN).

Through the above process, even if the visitor locator does not have the information of the specific subscriber, the mobile switching center can obtain the information of the subscriber.

The present invention can be variously modified and can take various forms and only the specific embodiments thereof are described in the detailed description of the invention. It is to be understood, however, that the present invention is not limited to the specific forms mentioned in the detailed description of the invention, but rather includes all modifications, equivalents, and substitutions within the spirit and scope of the invention as defined by the appended claims. It should be understood to do.

In the present invention operating as described above, the effects obtained by the representative ones of the disclosed inventions will be briefly described as follows.

The mobile switching center may request the subscriber's information from the home locator, even if the visitor locator does not have the specific subscriber's information. The system operator can know the subscriber's electronic serial number regardless of the mobile switching center where the subscriber is located. Therefore, the mobile switching center can know the subscriber information of the mobile telephone developed by another producer, which makes the interworking between systems easier. The system operator can also manage the subscriber more conveniently using the telephone identification number.

Claims (5)

In a mobile switching center that connects a mobile subscriber to another mobile subscriber or another network and obtains subscriber information from the visitor locator, and a home locator that passes the subscriber information to the visitor locator of the mobile switching station, Requesting, by the mobile switching center, to transmit the mobile subscriber's telephone identification number (MIN) to the home locator to request subscriber information of the mobile subscriber; A search step wherein the home locator retrieves subscriber information from the subscriber database using the telephone identification number; And And a home position register forwarding the retrieved subscriber information to a mobile switching center. 2. The method of claim 1, wherein the step of responding further comprises the step of the home location registrar delivering the mobile serial number of the mobile subscriber to a mobile switching center. In a mobile switching center that connects a mobile subscriber to another mobile subscriber or another network and obtains subscriber information from the visitor locator, and a home locator that passes the subscriber information to the visitor locator of the mobile switching station, The mobile switching center or visitor locator forwarding the telephone identification number to the home locator; The mobile switching center or visitor locator forwarding the subscriber's credentials to the home locator; And And the mobile switching center or visitor locator forwards the system type code to the home locator. In a mobile switching center connecting a mobile subscriber to another mobile subscriber or another network and requesting information about the subscriber by sending a request message to the home locator if the visitor locator does not have information about the particular subscriber, Sending to the home locator an entitlement message comprising a field indicating the mobile subscriber's telephone identification number (MIN), a field indicating the entitlement code of the entitlement message and a field indicating the type code of the system; How do I request subscriber information? In a home location register that sends an entitlement response message containing information about a subscriber to a mobile switching center when the mobile switching center connecting the mobile subscriber to another mobile subscriber or another network requests information about the specific subscriber, And sending an entitlement response message consisting of a field indicating the type code of the system and an electronic serial number (ESN) of the mobile subscriber to the mobile switching center.