Interference-control method and femto base station
AssigneePanasonic Intellectual Property Corporation of America
InventorJinsong Duan
Life of this patent
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Abstract
Provided are an interference-control method and femto base station whereby inter-cell interference between a femtocell and a macrocell is decreased without a loss in throughput or coverage of the femto base station. A nearby-macro-terminal detection unit (306) in the femto base station (103) detects whether there are any macro terminals (102) within communication range of the femto base station (103) that are not registered with the femto base station (103). If a macro terminal (102) is detected, an interference-control unit (307) controls interference by either decreasing the total transmission power of the femto base station (103) or allocating, to femto terminals (104) registered with the femto base station (103), frequencies that differ from the frequency used by the macro base station (101).
Claims11
An interference control method comprising:
- measuring, at a femto base station, an interference power of an uplink transmission from a macro terminal to a macro base station, the macro terminal not being registered to the femto base station;
- and
- detecting whether the macro terminal is within a communication range of the femto base station by comparing the measured interference power with a threshold value,
- wherein interference control is performed by a total transmission power reduction processing or a frequency division processing when the macro terminal is detected and the interference control is deactivated when the macro terminal is not detected, and
- wherein in the total transmission power reduction processing, the total transmission power of the femto base station is reduced, and in the frequency division processing, a frequency different from a frequency used by the macro base station is allocated to a femto terminal registered to the femto base station.
A femto base station comprising:
- a measurement section that measures an interference power of an uplink transmission from a macro terminal to a macro base station, the macro terminal not being registered to the femto base station;
- a macro terminal detection section that detects whether the macro terminal is within a communication range of the femto base station by comparing the measured interference power with a threshold value;
- and
- an interference control section,
- wherein interference control is performed by a total transmission power reduction processing or a frequency division processing when the macro terminal is detected, and the interference control is deactivated when the macro terminal is not detected, and
- wherein in the total transmission power reduction processing, the total transmission power of the femto base station is reduced, and in the frequency division processing, a frequency different from a frequency used by the macro base station is allocated to a femto terminal registered to the femto base station.
Dependencies are inferred from the claim text.