KR19980014913A - A location registration method using a variable location registration area list (using a registration method using a flexible registration zone table) - Google Patents

Abstract

An object of the present invention is to prevent the waste of radio resources by distributing load caused by signal traffic related to location registration to all base stations.

The present invention relates to a mobile communication system in which a mobile communication network defines a location registration area list having a different size and shape according to necessity for each base station and sets the list to a mobile station that requests location registration at a corresponding base station, The signal traffic of the base station is to disperse all the base stations.

Description

A location registration method using a variable location registration area list (using a registration method using a flexible registration zone table)

The present invention relates to a location registration method using a variable location registration area list in a digital mobile communication system.

Generally, in a digital mobile communication system, a service area is divided into a plurality of location registration areas, and one location registration area is divided into one or more cells and operated.

This is to prevent a waste of radio resources generated when a mobile station calls a mobile station for a whole area of a service when requesting an incoming call.

Base stations belonging to the same location registration area periodically broadcast an identification number of the same location registration area and the mobile station analyzes the location registration area identification number received from the base station every time it moves and determines whether the mobile terminal has entered a new location registration area .

If it is found that the mobile station has entered a new location registration area, the mobile station performs location registration in that area.

The location registration result of the mobile station is stored in a VLR (Home Location Register) or an HLR (Home Location Register). In the HLR, general information of a mobile station registered as a location, that is, information on which VLR the mobile station is located, More detailed information of the location registration area, that is, information on which location registration area is located.

When an incoming call request of the mobile station is received, the network broadcasts a mobile station paging message to all base stations in the location registration area where the mobile station is currently located through the HLR and the VLR, and the corresponding mobile station receives the incoming call request. Through the location registration area method, the digital mobile communication system can effectively operate radio resources.

In this previous scheme, the location registration area consists of one or more base stations and its configuration itself is fixed in the cell design process before service start.

For this reason, the cells in the location registration area are divided into cells in the boundary area and cells inside the boundary.

The signaling traffic related to the call processing is processed by all the base stations but the signal traffic related to the position registration is dedicated only to the base station located in the boundary region of the location registration area .

In addition, conventionally, if the size of the cell is reduced to accommodate an increasing number of mobile stations, the number of location registration occurrences increases, and only the base station located in the boundary region of the location registration area processes the signal traffic related to the increased location registration There is another problem that further amplifies the problem of becoming.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to prevent radio resource waste by distributing load caused by signal traffic related to location registration to all base stations.

FIG. 1 is a block diagram of a general digital mobile communication system to which the present invention is applied; FIG.

FIG. 2 is a diagram showing a case where a mobile station performs location registration at a base station 0;

FIG. 3 is a diagram illustrating a case where a mobile station succeeding in location registration at a base station 0 enters a region of a base station 12 out of a location registration group in FIG.

FIG. 4 shows all the cases where a mobile station succeeding in location registration at the base station 0 leaves the location registration area.

FIG. 5 is a view showing an example of an actual location registration area and a location registration area list according to the location of the mobile station;

Description of the Related Art [0002]

100, 200: Location registration area 110, 120, 130, 210, 220,

111, 121, 131,

112, 113, 122, 123, 132, 133, 212, 213, 222,

300: HLR 310, 320:

311,321: VLR

According to another aspect of the present invention, there is provided a location registration method for a digital mobile communication system, the location registration area list having a size and a shape arbitrarily defined by a switching network for a location registration request of the mobile station, And distributing signal traffic of a base station to a plurality of base stations in a location registration area.

The location registration area list is not allocated to each mobile station but is allocated to each base station, and the mobile station uses the location registration area list which has been received to update its own location registration area when the location registration succeeds.

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

FIG. 1 is a block diagram of a general digital mobile communication system to which the present invention is applied.

Referring to FIG. 1, a general digital mobile communication system to which the present invention is applied will be described below.

Since the present invention uses the variable location registration area list, the concept of the conventional fixed location registration area is meaningless.

However, only the location registration area group in which a plurality of conventional fixed location registration areas are gathered is significant.

This is also because of the capacity of the VLR and if the capacity of the VLR is large enough to cover all the service areas, the concept of the location registration zone group will be unnecessary.

The switching network can define a location registration area list in any size or any shape within one location registration area group.

The location registration area list is composed of a reference cell and neighboring cells.

That is, the definition of the location registration area list is differently defined for each base station.

Thus, depending on the location registration area, some are composed of one cell and others are composed of a plurality of cells.

When each mobile station requests location registration in its own cell, the corresponding base station receives the location registration request and sends it to the mobile switching center.

The mobile switching center defines the corresponding location registration area of the corresponding mobile station according to the location registration request received from each base station and stores the corresponding information in the HLR and the VLR, respectively.

The mobile switching center manages a group of location registration areas with a VLR.

The HLR is also associated with a mobile switching center that manages another location registration area group and also stores information from other mobile switching centers.

A different location registration area is allocated to each base station so as to utilize various mobile characteristics of the mobile station, thereby having different location registration areas for each mobile station according to the mobile path of the mobile station.

Thus, all the base stations are located in the boundary area of the location registration area and share the signal traffic generated by the location registration.

As a result, all the base stations share the location registration signal traffic.

In addition, one or more base stations may use the same location registration identification number, where all the base stations must be located in the border area of the location registration area.

If any one of the base stations is located within the boundary area, some base stations do not share the signal traffic due to the location registration.

The system operator can distribute the signal traffic by arbitrarily changing the location registration area list when the signal traffic due to the location registration is concentrated in the specific base station according to the service environment change.

Since the process of changing the location registration area list is performed irrespective of the mobile station, the user can receive the same service as before.

2 is a diagram showing a case where the mobile station performs location registration at the base station 0;

Referring to FIG. 2, the case where the mobile station registers the location in the base station 0 will be described as follows.

The location registration area identification number is a unique number allocated to each base station, and is a number preset by the system operator before service.

When the mobile station is first powered on in the service area of the base station having the location registration area identification number 0 and transmits the location registration request message to the base station, the mobile station tries to register the location through the base station 0, Receive a registration success message.

The location registration success message includes a location registration area list, which includes an in-place location registration identification number grouped with base station 0.

In this embodiment, the base stations bundled with the base station 0 are referred to as base stations 1, 2, 3, 4, 5, and 6.

The mobile station automatically stores or changes the location registration area lists 0, 1, 2, 3, 4, 5, and 6 as the current location registration area of the mobile station, and does not perform location registration while moving within the location registration area.

If the location registration identification number received through the broadcast message while the mobile station is out of the location registration area and the mobile station is moving is not included in the location registration area list, the mobile station attempts to register the location through the currently located base station, Location registration together.

FIG. 3 is a diagram illustrating a case where a mobile station successfully registered in the base station 0 enters the area of the base station 12 out of the location registration group in FIG.

Referring to FIG. 3, a case where a mobile station which has successfully registered in the base station 0 in the first step enters the area of the base station 12 after leaving the location registration group will be described.

If the mobile station moves to the base station 12 via the base station 0 and the base station 1 and recognizes that the mobile station has entered the base station 12 through the broadcast message of the base station, it compares the mobile station with the location registration area list, It is judged to have escaped.

At this time, the mobile station performs location registration through the base station 12.

If the location registration is successful, the base station 12 is notified of the neighbor base station identification number grouped again.

The mobile station automatically changes the location registration area list to the base stations 1, 2, 7, 11, 12, 13, and 44.

The location registration request by the mobile station is transmitted to the VLR and the HLR according to the scheme of the existing digital mobile communication system.

The VLR has a list of location registration areas for each base station under its control.

Also, when location registration is requested by a mobile station in a base station to which the VLR manages, the VLR transmits a list of mapped location registration areas to the mobile station.

When the base station calls the mobile station, only the base stations belonging to the location registration area to which the mobile station belongs are caused to page.

That is, if the mobile station has successfully registered the location through the base station 12 and then does not perform location registration at another base station, the base station 12 and the base stations 1, 2, 7, 11, 13, .

FIG. 4 is a diagram illustrating a case where a mobile station succeeding in location registration at the base station 0 is out of the location registration area.

Referring to FIG. 4, all the cases where the mobile station succeeding in location registration at the base station 0 escape from the location registration area will be described.

When the mobile station randomly moves according to the movement characteristics of the user, different location registration areas are created for each mobile station.

Then, each base station divides and processes signal traffic by location registration.

That is, many mobile stations that have successfully registered their locations in the base station 0 can access the base stations 11, 12, 19, 20, 27, 29, 30, 37, 38, 45, Can be moved.

Each mobile station that has entered the base station is notified of the location registration area list of the corresponding base station.

As a result, the location registration area can not be fixed, and signal traffic due to location registration can occur in all base stations, not only in a specific boundary area.

By doing so, each base station shares signal traffic by location registration and processes it.

FIG. 5 is a diagram showing changes in the actual location registration area and the location registration area list according to the location of the mobile station.

Referring to FIG. 5, changes in the actual location registration area and the location registration area list according to the location of the mobile station will be described below.

In general, when the location registration area list data is stored in the VLR, if the area of the VLR is changed, the corresponding mobile station must perform location registration unconditionally.

To do so, the location registration area list is created in the border area of the VLR so as not to overlap the location registration area list of other VLRs.

The following table is a list of base station identification numbers and location registration areas with respect to FIG.

Therefore, even if the size of the location registration area is reduced to accommodate an increasing number of mobile stations, even if the amount of signal traffic associated with location registration is greater than the signal traffic associated with call processing, And thus, all signal traffic is distributed to each base station without wasting radio resources.

Claims (5)

A location registration method of a digital mobile communication system, Wherein the mobile station sets a location registration area list in which a size and a shape are arbitrarily defined according to necessity for a location registration request of the mobile station, and distributes the signal traffic of the base station related to the location registration area to the plurality of base stations. Location registration method using area list. The method according to claim 1, And the exchange network completes the setting of the newly defined location registration area by transmitting the location registration area list to the mobile station. The method according to claim 1, If the location registration ID number received from the new base station is included in the location registration area list received from the exchange network when the mobile station enters the new base station and if it is not included in the location registration area list, And a new location registration area list is given to the new location registration area list. The method of claim 3, Wherein the location registration identification number is different for each base station, and the plurality of base stations operate the same location registration identification number. The method according to claim 1, Wherein the VLR manages one or more location registration areas by using a database, wherein different VLRs operate mutually exclusive location registration area lists.