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Mobile communication system, base station, cell coverage control method

A technology of mobile communication system and cell coverage, which is applied in the field of controlling the cell coverage of the base station, and can solve the problems such as the inability to obtain the cell coverage after sending

Inactive Publication Date: 2015-10-14
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the system application is started after setting the above-mentioned predetermined parameters, it may not be possible to obtain the original data later due to changes in system application conditions or changes in the wireless environment (such as changes in path loss due to new buildings). Predetermined Cell Coverage

Method used

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  • Mobile communication system, base station, cell coverage control method
  • Mobile communication system, base station, cell coverage control method
  • Mobile communication system, base station, cell coverage control method

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Experimental program
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no. 2 Embodiment approach

[0059] Next, a mobile communication system according to the second embodiment will be described.

[0060] In the mobile communication system according to the second embodiment, the measurement of the cell coverage is performed when the handover between the eNB and the UE is performed. In this embodiment, the distance from the eNB to the cell edge (the first distance to the eNB serving as a reference of the cell coverage) is calculated from the position information from the UE and the received power value of the reference signal. Then assume a circular measurement cell coverage area with the distance to the eNB as the radius and the eNB as the center. In actuality, the cell coverage area is not exactly circular, but assuming this, it is possible to easily control the transmission power (described later).

[0061] (2-1) Handover between eNBs

[0062] The mobile communication system according to this embodiment belongs to, for example, E-UTRAN (Evolved Universal Terrestrial Rad...

no. 3 Embodiment approach

[0110] Next, a mobile communication system according to a third embodiment will be described.

[0111] In this embodiment, similar to the second embodiment, the distance from the eNB to the cell edge (the first distance to the eNB serving as a reference of the cell coverage) is calculated based on the location information and the received power value from the UE. Furthermore, assume a circular measurement cell coverage area whose radius is the distance from the eNB and whose center is the eNB.

[0112] (3-1) Outline of control

[0113] Different from the second embodiment, in this embodiment, when the eNB determines that the UE is near the edge of the cell based on the received power value report from the UE, it calculates the cell coverage area based on the position information and the received power value from the UE. radius. The determination of whether the UE is near the cell edge is based on whether the received power value reported from the UE is below a predetermined ...

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Abstract

There is provided a mobile communication system, a base station, and a method of controlling cell coverage that is capable of operating a mobile communication system such that the cell coverage is maintained approximately and timely at a target level without requiring much labor. In this mobile communication system, a mobile station reports to the base station the position information of the mobile station and the value of reception power of reference signal from the base station. The base station obtains the measured cell coverage as a result of measurement of cell coverage based on the position information and the value of reception power from the mobile stations, and controls at least one of plural parameters including transmission power to the mobile stations, tilt angle of antenna, etc., so as to minimize deviation of the measured cell coverage from the target cell coverage.

Description

technical field [0001] The invention relates to the technique of controlling the cell coverage of a base station in a mobile communication system. Background technique [0002] Conventionally, in a mobile communication system, the communication operator that provides the service determines in advance the coverage area of ​​the cell, that is, the service area of ​​each wireless base station (hereinafter referred to as "base station") for the mobile station, and sets parameters for the base station so that the cell can be obtained. coverage. The parameters are, for example, transmission power, antenna height, pointing direction, tilt angle, etc. for each cell of the base station. When the system application is started after setting the above-mentioned predetermined parameters, it may not be possible to obtain the original data later due to changes in system application conditions or changes in the wireless environment (such as changes in path loss due to new buildings). Pred...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/28H04W16/18
CPCH04W24/08H04W16/28H04W24/02H04W36/0088H04W52/245H04W52/247H04W52/283H04W52/40H04W16/18H04W88/08
Inventor 小池一司中原徹小川浩二
Owner FUJITSU LTD