Method and system for determining antenna of radio base station at moving target area during handover
AssigneeNtt Docomo, Inc.
InventorsTakayuki Ishiguro, Hiroyuki Ishii
Life of this patent
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Abstract
At a time of the handover, the communications with respect to the radio terminal related to the handover are carried out by using the same antenna as the antenna with respect to the other radio terminal that is already located in the moving target area, so that interferences due to the difference in the propagation paths can be suppressed to the minimum, and the receiving quality can be improved.
Claims4
A radio base station device for carrying out radio communications with a radio terminal, the radio base station device comprising:
- a handover detection unit configured to detect a handover when the radio terminal moves between areas covered by different radio base stations;
- an antenna in use detection unit configured to detect one antenna currently in use among a plurality of antennas controlled by the radio base station device at a moving target area, in relation to the handover detected by the handover detection unit;
- and
- an antenna determining unit configured to determine the one antenna detected by the antenna in use detection unit as an antenna to be used with respect to the radio terminal related to the handover at the moving target area.
A method for determining an antenna in radio communications between a radio base station and a radio terminal, the method comprising:
- (a) detecting a handover when the radio terminal moves between areas covered by different radio base stations;
- (b) detecting one antenna currently in use among a plurality of antennas controlled by the radio base station at a moving target area, in relation to the handover detected by the step (a);
- and
- (c) determining the one antenna detected by the step (b) as an antenna to be used with respect to the radio terminal related to the handover at the moving target area.
Dependencies are inferred from the claim text.