JP3277743B2 - Location registration device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for registering a position of a mobile station in mobile communication.

[0002]

2. Description of the Related Art FIG. 2 shows an example of an arrangement of mobile stations and base stations in a radio zone of a mobile communication system. 1,2,
3, 4 are base stations, 5 is a mobile station, 6 is an exchange, A, B,
C and D are wireless zones of the base stations 1, 2, 3, and 4, respectively. In this example, the mobile station 5 is located in the radio zone A of the base station 1 and at the boundary between the radio zones B and C of the base stations 2 and 3, and transmits the radio waves of the base stations 1, 2, and 3. Both can be received.

At the time of location registration, the mobile station 5 first acquires the base station 1 which can be acquired via the base station 1 having the best radio communication condition.
A few IDs and reception levels are transmitted to the exchange 6. The exchange 6 that has received it checks the base station ID, and if normal, registers all of the base stations 1, 2, and 3 and transmits the registered base station ID to the mobile station 5. The mobile station 5 that has received the registered base station ID receives the base station I.
Register all D.

[0004]

However, in the above-described conventional location registration apparatus, when a mobile station is located over a plurality of wireless zones, all of the base station IDs are registered at the time of location registration. As a result, the location registration area becomes large, and as a result, when the mobile station moves within the large area, there is a problem that the exchange cannot specify where the mobile station exists within the large area.

An object of the present invention is to solve such a conventional problem, and an object of the present invention is to provide a position registration device capable of improving the accuracy of position information of a mobile station.

[0006]

SUMMARY OF THE INVENTION According to the present invention, in order to achieve the above-mentioned object, a mobile station has a radio communication state at the time of location registration.
ID of the base station that can be acquired via the best base station
And the reception level to the exchange, and the captureable base
The exchange that received the station ID and reception level registers the location.
Mobile stations that require
The base station limits the number of base stations for which the mobile station registers the position.
From the base station with the higher reception level
In this order, location registration is performed for the set number of location registration base stations.
It is obtained as cormorants.

[0007]

According to the present invention, the switching apparatus sets and restricts the number of base stations for which the mobile station registers the position,
The location registration area can be reduced, and the location information accuracy of the mobile station can be improved.

[0008]

FIG. 1 shows an outline of a location registration process according to an embodiment of the present invention. The arrangement example of base stations and mobile stations in the system is the same as that in FIG. Now, when the mobile station 5 is powered on or moving to the location registration area (step 11), first the base station 1 having the best wireless communication state is captured, and the base station 1 and other base stations 2 that can be captured are acquired. ID of 3
And its reception level to the exchange 6 (step 1).
2). The exchange 6 receiving this checks whether or not the mobile station 5 limits the number of location registration base stations in the area (step 13). Is set (step 14).

When one of the above settings is “none”, the exchange 6 transmits the information to the base stations 1, 2, 2,
3 are registered (step 15). Then, the registered base station ID is transmitted to the mobile station 5 (step 18),
The mobile station 5 that has received the base station ID receives the base station ID.
Are all registered (step 19).

When both of the above settings are “Yes”, the exchange 6 transmits the base station ID received from the mobile station 5 via the base station.
And the reception levels thereof are sorted in descending order of the reception level (step 16). Then, in order from the base station having the highest reception level, the base station IDs corresponding to the set number of area configuration base stations
And the reception level are registered (step 17). Thereafter, the exchange 6 transmits the base station ID registered in step 17 to the mobile station 5 (step 18), and the mobile station 5 that has received the base station ID registers all the received base station IDs (step 19). .

[0011]

According to the present invention, as is apparent from the above embodiment, the number of base stations to be registered at the time of location registration of a mobile station can be set and limited in the exchange. The position information accuracy of the station can be improved.

[Brief description of the drawings]

FIG. 1 is a flowchart showing an outline of a location registration process according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing an example of an arrangement of base stations and mobile stations in a mobile communication system.

[Explanation of symbols]

 1, 2, 3, 4 Base station 5 Mobile station 6 Switch A, B, C, D Radio zone

Claims (1)

(57) [Claims] 1. A mobile station, via the wireless communication state is most favorable base station for position registration, ID of capturable base station
And the reception level to the exchange, and the captureable base
ID and the reception level switch which receives the stations, a mobile station and a radio communication state is requesting location registration is the most favorable base station limits the number of base stations which the mobile station is location registration
A location registration device characterized by performing location registration for a set number of location registration base stations in order from a base station having a higher reception level when the setting is made .