JPH1023514A - Mobile communication controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To constitute radio zones for respective base stations according to the movement state of mobile stations as to the mobile communication controller which controls the transmission power of each base station for a ground mobile communication of mobile radiophones, automobile telephone, etc. SOLUTION: A service area is composed of radio zones 3a to 3f of a plurality of base stations 2a to 2f and a radio communication is made through the base stations in the radio zones where the mobile stations 3a to 4a are present. This mobile communication system controls the radio transmission power of each base station by a radio control station 1 which manages the service area and varies the sizes of the radio zones of the respective base stations individually to change the constitution pattern of the service area.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication control device for controlling the transmission power of each base station in land mobile communication such as a mobile phone and a car phone.

[0002]

2. Description of the Related Art In recent years, the demand for land mobile communication has increased remarkably, and it is necessary to handle the maximum number of mobile stations (such as mobile phones and car phones) within a limited frequency band. For this reason, a small zone system in which one service area is covered by a plurality of small wireless zones is currently employed. In the small zone method, the same frequency can be reused in another zone,
A large number of mobile stations can be handled as a whole.

FIG. 2 is a schematic configuration diagram of a mobile communication system using such a small zone system, in which a plurality of base stations 2a, 2b,... Since the radio transmission power of each of the base stations 2a to 2f is the same, each of the base stations 2a to 2f has a radio zone 3a, 3b,..., 3f of the same size. Note that the wireless zone refers to a range in which the mobile station can communicate when the electric field level from the base station is equal to or higher than a certain value.

[0004] In this example, the mobile station 4a is connected to the radio zone 3a.
, The mobile station 4b is within the wireless zone 3b, the mobile station 4c is outside the wireless zone 3b, the mobile station 4d is outside the wireless zone 3a, and the mobile station 4e is within the wireless zone 3f. I have.

[0005]

In the above-mentioned conventional example,
Even if the mobile station concentrates in a specific area, a disadvantage arises in that the size of the preset wireless zone cannot be changed.

[0006] The installation of base stations is limited to some areas mainly in urban areas, and although the population coverage is high, the area coverage is not so high. For this reason, mobile stations in the wireless zone located at the border of the service area,
The inconvenience of easily deviating from the service area during a call and interrupting the call occurs.

The present invention has been made to solve such a conventional problem, and has as its object to configure a wireless zone of each base station in accordance with the movement state of a mobile station.

[0008]

According to the mobile communication control device of the present invention, a service area is formed by a plurality of base stations in radio zones, and radio communication is performed via the base stations in the radio zone in which the mobile stations are located. In a mobile communication system, a radio control station that manages a service area controls radio transmission power of each base station, and changes the configuration pattern of the service area by individually changing the size of the radio zone of each base station. It is.

According to the present invention, the radio zone of each base station can be configured in accordance with the moving situation of the mobile station.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, a service area is constituted by a plurality of base station radio zones, and radio communication is performed via a base station in a radio zone where a mobile station is located. In a mobile communication system, a radio control station that manages a service area controls radio transmission power of each base station, and changes the configuration pattern of the service area by individually changing the size of the radio zone of each base station. Thus, the configuration pattern of the service area can be changed by individually controlling the radio transmission power of a plurality of base stations.

According to a second aspect of the present invention, in the first aspect of the present invention, the control of the radio transmission power of each base station by the radio control station is performed based on position information of the mobile station in the service area. Thus, the wireless zone of each base station can be configured according to the movement status of the mobile station.

According to a third aspect of the present invention, in the first aspect of the invention, the control of the radio transmission power of each base station by the radio control station is performed based on preset conditions. When the moving conditions of the mobile station are different, the wireless zone of each base station can be configured according to the time zone.

Hereinafter, an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic diagram of a mobile communication system to which a mobile communication control apparatus according to an embodiment of the present invention is applied. A radio control station 1 controls radio transmission power of a plurality of base stations 2a to 2f, Wireless zone 3 of 2a to 2f
It is configured so that the sizes of a to 3f can be changed.

In this configuration, the radio transmission power of the base stations 2a, 2b, 2c is increased by the control of the radio control station 1 to expand the radio zones 3a, 3b, 3c, and the base station 2
When the wireless transmission power of d, 2e, 2f is reduced to reduce the size of the wireless zone 3d, 3e, 3f and the size of the wireless zone constituting the service area is changed, the mobile station existing outside the wireless zone 3b 4c enters the wireless zone 3b,
The mobile station 4d existing outside the wireless zone 3a enters the wireless zone 3a or 3c, and respectively exists in the service area.

Such a change in the configuration pattern of the service area (a change in the size of each wireless zone) not only changes according to the movement state of the mobile station as described above, but also considers the movement state of the mobile station in advance. Alternatively, it may be changed. In this case, the period may be changed periodically in consideration of the case where the moving state of the mobile station differs depending on the time zone.

[0016]

According to the present invention, the radio transmission power of each base station in the service area can be changed for each base station, so that the size of each radio zone can be changed according to the moving situation of the mobile station. Can be changed.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a mobile communication system to which a mobile communication control device according to the present invention is applied;

FIG. 2 is a schematic configuration diagram of a conventional mobile communication system.

[Explanation of symbols]

 1 Radio Control Station 2a-2f Base Station 3a-3f Radio Zone 4a-4e Mobile Station

Claims (3)

[Claims] 1. A mobile communication system in which a service area is configured by wireless zones of a plurality of base stations and wireless communication is performed via a base station in a wireless zone where a mobile station is located, a radio control station managing the service area A mobile communication control device for controlling the radio transmission power of each of the base stations and individually changing the size of the radio zone of each of the base stations to change the configuration pattern of the service area. 2. The mobile communication control device according to claim 1, wherein the control of the radio transmission power of each base station by the radio control station is performed based on position information of the mobile station in the service area. 3. The mobile communication control device according to claim 1, wherein the control of the radio transmission power of each base station by the radio control station is performed based on preset conditions.