KR0135910B1 - Location of Subscribers in Multiple Exchange Adjacent Areas - Google Patents

Abstract

According to the present invention, when a subscriber moves to an area where several exchanges are adjacent to each other, the location of subscribers in several adjacent areas of the switch for reducing the load in the wireless according to the location registration, increasing the reliability of the tracking of the subscriber and distributing the load on the wireline In particular, the method relates to a tracking method. When a subscriber requests a location registration request from a control station that manages a reference cell, the control station transmits a location updater including a unique terminal number and identification number of the subscriber and a cell unique number of the reference cell to which the subscriber has moved. The first process of transmitting a message and the exchange receiving the location updater message in the first process are performed by the exchange within a predetermined registration distance based on the corresponding cell unique number using the previously stored terrain database and the cell unique number. A second step of calculating whether there is a predetermined distance and the predetermined registration distance area And if it is determined that there is an exchange adjacent to the subscriber station, a third process of combining the location updater message with the result calculated in the second process and transmitting the result to the control station. If a subscriber provides location registration method and routing method according to this, when one subscriber moves to a neighboring area and performs distance-based location registration method, one exchange registers location to HLR and the location information of another exchange to HLR. By using this information when storing and routing, it is possible to reduce the location registration load that occurs when the subscriber repeatedly moves between the exchanges in the border area and the possibility of losing the subscriber at the exchange.

Description

Location of Subscribers in Multiple Exchange Adjacent Areas

1 is an exemplary diagram for explaining a subscriber location tracking method in several areas adjacent to the exchange according to the present invention.

2 is a flowchart illustrating a location registration method according to the present invention.

3 is an operational flowchart illustrating a routing scheme according to the present invention.

The present invention relates to a method for managing subscriber location information in a cellular system. In particular, when a subscriber moves to an area where several exchanges are adjacent to each other, the present invention reduces the load in the wireless according to location registration and improves reliability of location tracking. The present invention relates to a method for locating subscribers in areas adjacent to multiple exchanges to increase and distribute the load on the wire.

In general, cellular systems include a subscriber location registration database (HLR), which permanently stores subscriber location information, and a database (MSC / VLR), which is responsible for general call processing and stores temporary location information of subscribers. do.

Since the VLR manages a mobile station in zone units, the VLR receives a registration request from the mobile station and performs location registration for the subscriber as being in a specific zone.

In the cellular system having the above configuration, the position of the mobile station moving the cell should be checked from time to time to prepare for a call. Inevitably, the load of the system for checking the position of the mobile station is inevitably increased.

There is a zone-based location registration among the conventional methods for reducing the location registration load in the wireless section. Briefly, the conventional method includes an area in which an exchange (MSC / VLR) provides a service in one or more cells. It consists of zones and location registration based on this zone.

When a subscriber moves between zones within the same exchange, he / she registers the location within the exchange, and when moving during the exchange period, registers with the exchange and the HLR. When registering the location, if the subscriber moves into a new exchange, it recognizes it and requests the location registration at the exchange.

However, according to the conventional method, when a subscriber repeatedly moves from one exchange to another in a region where several exchanges are adjacent, the subscriber repeatedly requests location registration from the exchange, so that a large load is generated in the wireless section and the position of the subscriber is changed. There was a problem that there is a lot of potential loss.

In addition, in the distance-based location registration method, when the subscriber moves between base stations, the subscriber should move to the adjacent cell because the location information (latitude, longitude, range of registration distance) of the region where he or she first registered should be input to the temporary memory device. As a result, since new location registration is performed only when the distance information of the recently registered cell is compared with the location information of the current cell, the new location registration is performed.

An object of the present invention for solving the above problems is that when a subscriber moves to an adjacent area and performs a distance-based location registration method, one exchange registers the location with the HLR and stores the location registration with respect to the other exchange in the HLR. By using this information when routing, it provides a method for locating subscribers in several adjacent areas of the exchange to reduce the location registration load that occurs when the subscriber repeatedly moves between exchanges in the border area and to reduce the possibility of losing the subscriber at the exchange.

A feature of the present invention for achieving the above object is, in a cellular system, a mobile station is a location registration method for subscriber location tracking when a plurality of exchanges are moved into an adjacent distance registration area, wherein a subscriber station controls a reference cell. Requesting a location registration to the control station, the control station transmits a location updater message including a terminal unique number and identification number of the subscriber and a cell unique number of the reference cell to which the subscriber has moved, and the location in the first process. The exchange receiving the updater message uses the previously stored terrain database and the cell unique number to calculate whether there is a switch within a predetermined registration distance based on the corresponding cell unique number and the schedule in the second process. If it is determined that there is an adjacent exchange within the registration distance area, the location update message is displayed. By combining the results been calculated in the second step it may comprise a third step of transmitting to the control station.

Another aspect of the present invention for achieving the above object is a routing method for subscriber location tracking when a mobile station moves in a cellular system to a plurality of exchanges within an adjacent distance registration area. If a call is requested, the exchange in charge of the call request searches the subscriber's memory to search for the presence of the called party, and if it is determined that there is no called party in the first step, the control station transmits a call to the called party. The second process of requesting routing information for the called party by sending a message requesting information by sending a message requesting the information, and the control station receiving the location request message are registered by the called party. Exchanges are retrieved from stored data and the recipients A third step of sending a message requesting routing to multiple exchanges having a unique number of a neighboring exchange registered by the subscriber if the subscriber is located in the contact area; and each exchange receiving the message has a cell unique number in the received message. A fourth process of calculating and paging its cells at a predetermined registration distance of the boundary, and the exchange responding to the paging in the fourth process sends a response message to the control station in response to the location request including routing information The fifth step of sending and the control station receiving the response message includes a sixth process of sending the response message according to the location request to the exchange requesting routing so that the originating exchange and the incoming exchange can route. have.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is an exemplary view for explaining a subscriber location tracking method in adjacent areas of multiple exchanges according to the present invention. When a subscriber moves to a distance registration area adjacent to multiple exchanges, the subscriber requests distance-based location registration from the base station.

The base station sends its cell-ID information to the exchange (MSC / VLR) and requests location registration. The exchange uses this cell-ID and the terrain database to provide information about the multiple exchanges within the registration distance based on that cell. Sees the HLR and the HLR stores it.

Therefore, through the above process, the unique number for each exchanger within a certain registration distance centering on the reference cell through one exchange is stored in the HLR, and the multiple exchanges do not register their positions within a certain distance of the adjacent area. The registration load may be reduced in the radio section.

In addition, when a call request comes from a general public telecommunication network, the receiving exchange requests the HLR for routing information about the called subscriber, and the HLR requests routing to the exchanges associated with the subscriber.

At this time, the exchange receiving the routing request pages the location registration area at a certain distance based on the cell-ID, and the exchange receives the routing information to the HLR.

The HLR routes this exchange to the originating request exchange.

Subscriber location tracking method according to the present invention can be thought of as a separate location registration process and routing process, that is, when the location registration method is changed, the paging method is also changed, the reason is that the location dynamic and paging method is not operated This is because they are closely related to each other.

Briefly described with reference to FIG. 2 attached to the location registration method according to the present invention, when the mobile station moves within a distance registration area adjacent to several exchanges as shown in the attached first diagram, the subscriber controls the reference cell. When the station requests a location registration, the control station sends a location updater message (1) including the subscriber's terminal unique number and identification number and the cell-ID of the reference cell to which the subscriber has moved.

At this time, the structure of the location updater message is shown in Table (1) below.

The exchange including the VLR in the system calculates whether there is an exchange within a certain registration distance based on the cell-ID using the previously stored terrain database and the cell-ID.

Based on this cell-ID, it determines whether there is an exchange within a certain distance and sends a message to the HLR. After that, if it is determined that there is an exchange adjacent to a predetermined registration distance area (dr) based on the cell-ID, This information and the information as shown in the fabric 1 are sent to the HLR, a Registration Notification message 2, which is a message informing the HLR of the location registration.

The message structure at this time is shown in Table (2) below.

The HLR stores this information and the exchange sends a response message (3).

This information stored in the HLR is used as data to route to the called party when a call occurs.

When the subscriber moves from the currently registered exchange and moves for a certain distance (dr) area, the location registration is performed when the subscriber moves out of the boundary area and moves to a new location area.

Therefore, even if the subscriber repeatedly moves from the boundary to the exchange, there is no load in the radio according to the location registration.

Briefly described with reference to FIG. 3 attached to the routing method according to the present invention corresponding to the location registration method as described above, when a subscriber in a general notary communication network or another exchange requests a call, Retrieves the presence or absence of the called subscriber in the VLR in the. If there is no subscriber in its VLR in this search, the exchange sends a message (1) requesting information about the called party to the HLR, requesting routing information for the called party.

The structure of the location request message is shown in Table (3) below.

Receiving the location request message, the HLR searches the stored data for the exchange to which the called party is registered. As a result of the retrieval, if the called subscriber is a subscriber whose locations are registered in adjacent areas, the HLR sends a message (2) requesting routing to several switches having a unique number of the adjacent exchange in which the subscriber is registered. The structure of the routing request message is shown in Table 4 below.

The routing request message includes a terminal identification number (MIN) of the called party, a terminal unique number (ESN) of the called party, a cell-ID registered at the subscriber location registration, and a unique number of the called exchange.

Each exchange receiving this message calculates and paging its own cells at a certain registration distance of the boundary based on the received cell-ID. The exchange that responds to paging sends a response message (3) to the HLR for a location request containing routing information.

The structure of the routing request response message is shown in Table (5) below.

Receiving the response message, the HLR sends the response message 4 according to the location request to the exchange requesting routing so that the call exchanger and the incoming call exchanger can route.

The structure of the location request response message is shown in Table (6) below.

If the subscriber location tracking method is provided in the adjacent area of the multiple exchanges according to the present invention operating as described above, when the subscriber moves to the adjacent area and performs the distance-based location registration method, one exchange registers the location on the HLR and the other By using this information when storing and routing location information on the exchange in the HLR, it is possible to reduce the location registration load incurred when the subscriber repeatedly moves between the exchanges in the border area and to reduce the possibility of losing the subscriber at the exchange.

Claims (2)

A method of location registration for subscriber location tracking when a mobile station moves within an adjacent distance registration area in a cellular system, wherein the subscriber station requests a location registration from a control station that recommends a reference cell. A first process of transmitting a location update message including a terminal unique number and an identification number of the terminal and a cell unique number of the reference cell to which the subscriber has moved; The exchange receiving the location updater message in the first process, calculating a presence of the exchanger within a predetermined registration distance based on the cell unique number based on the previously stored terrain database and the cell unique number; And a third step of combining the location updater message with the result calculated in the second step and transmitting the result to the control station when it is determined that there is an adjacent exchange in the predetermined registration distance area in the second step. A method for location tracking of subscribers in adjacent areas of multiple exchanges. A routing method for tracking the location of a subscriber when a mobile station moves within a distance registration area adjacent to multiple exchanges in a cellular system, wherein the subscriber in charge of a call is requested when the subscriber in a general public network or another exchange requests a call. A first process of searching for a subscriber memory by searching for a subscriber memory; A second step of requesting routing information for the called party by sending a message requesting information about the called party to the control station when it is determined that there is no called party in the first step; Receiving the location request message, the control station searches the stored data of the exchange where the called party is registered, and if the called party is a subscriber whose location is registered in the adjacent area, the routing is routed to multiple exchanges with the unique numbers of the adjacent exchanges where the subscriber is registered. Transmitting a message requesting a request; Each exchange receiving the message, a fourth step of calculating and paging its cells at a predetermined registration distance of the boundary based on the cell unique number in the received message; A fifth step in which the exchange responding to the paging in the fourth process sends a response message to the control station in response to the location request including routing information; And a sixth process of the control station receiving the response message by sending a response message according to the location request to the exchange requesting routing so that the originating exchange and the incoming call exchanger can route. Location of subscribers in the area adjacent to the exchange.