Base station, radio communications system, control method of base station, radio communications method and control program
First Claim
Patent Images
1. A base station comprising:
- a decision unit which receives a transmission signal from a mobile station to another base station whose cell overlaps partially with a cell of the base station and decides a reception condition of the transmission signal;
a state change control unit which controls transition of a state of the base station between a sleep state, in which signal transmission from the base station is suspended, and a normal state, in which signal transmission from the base station is performed, based on a decision result of the decision unit; and
a transmission control unit which controls start and suspension of signal transmission of a control signal including a pilot signal with predetermined power based on an instruction of the state change control unit.
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Abstract
[Problems] Because it is not possible to reduce sufficiently the number of base stations that starts uselessly in spite of being in light traffic state, it is not possible to lower interference between adjacent cells and power consumption sufficiently.
[Measures] A base station receives a transmission signal from a mobile station to other base station, and starts transmission of a control signal with predetermined power depending on a reception condition of the transmission signal.
5 Citations
15 Claims
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1. A base station comprising:
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a decision unit which receives a transmission signal from a mobile station to another base station whose cell overlaps partially with a cell of the base station and decides a reception condition of the transmission signal; a state change control unit which controls transition of a state of the base station between a sleep state, in which signal transmission from the base station is suspended, and a normal state, in which signal transmission from the base station is performed, based on a decision result of the decision unit; and a transmission control unit which controls start and suspension of signal transmission of a control signal including a pilot signal with predetermined power based on an instruction of the state change control unit. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A control method of a base station comprising:
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receiving a transmission signal from a mobile station to another base station whose cell overlaps partially with a cell of the base station; deciding a reception condition of the transmission signal; controlling transition of a state of the base station between a sleep state, in which signal transmission from the base station is suspended and a normal state, in which signal transmission from the base station is performed, based on a result of deciding the reception condition; and controlling start and suspension of signal transmission of a control signal including a pilot signal with predetermined power based on a result of said controlling transition step. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A non-transitory computer-readable recording medium having embodied thereon a computer program, which when executed by a computer, causes the computer to function as:
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a decision function to receive a transmission signal from a mobile station to another base station whose cell overlaps partially with a cell of the base station, and to decide a reception condition of the transmission signal; a state change control function to control transition of a state of the base station between a sleep state, in which signal transmission from the base station is suspended, and a normal state, in which signal transmission from the base station is performed, based on a decision result of the decision function; and a transmission control function to control start and suspension of signal transmission of a control signal including a pilot signal with predetermined power based on an instruction of the state change control function.
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Specification