Wireless communication device and method for controlling transmission power
First Claim
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1. A communication apparatus comprising:
- an offset setter which, in operation, sets a first offset to control transmission power of a first Sounding Reference Signal (SRS) and to set a second offset to control transmission power of a second SRS, the second offset being different from the first offset;
a notifier which, in operation, notifies the first offset and the second offset to a communication partner apparatus;
a receiver which, in operation, receives from the communication partner apparatus the first SRS transmitted at the transmission power controlled by the first offset and at a first transmission time interval, and the second SRS transmitted at the transmission power controlled by the second offset and at a second transmission time interval that is different from the first transmission time interval; and
an estimator which, in operation, estimates channel quality of an uplink data channel based on the received first SRS and the received second SRS.
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Abstract
Disclosed is a wireless communication device that can suppress an increase in power consumption of a terminal while preventing the degradation of SINR measurement precision resulting from TPC errors in a base station. A terminal controls the transmission power of a second signal by adding an offset to the transmission power of a first signal; an offset-setting unit sets an offset correction value in response to a transmission time gap between a third signal transmitted the previous time and the second signal transmitted this time; and a transmission power control unit controls the transmission power of the second signal using the correction value.
73 Citations
10 Claims
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1. A communication apparatus comprising:
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an offset setter which, in operation, sets a first offset to control transmission power of a first Sounding Reference Signal (SRS) and to set a second offset to control transmission power of a second SRS, the second offset being different from the first offset; a notifier which, in operation, notifies the first offset and the second offset to a communication partner apparatus; a receiver which, in operation, receives from the communication partner apparatus the first SRS transmitted at the transmission power controlled by the first offset and at a first transmission time interval, and the second SRS transmitted at the transmission power controlled by the second offset and at a second transmission time interval that is different from the first transmission time interval; and an estimator which, in operation, estimates channel quality of an uplink data channel based on the received first SRS and the received second SRS. - View Dependent Claims (2, 3, 4, 5)
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6. A communication method comprising:
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setting a first offset to control transmission power of a first Sounding Reference Signal (SRS) and a second offset to control transmission power of a second SRS, the second offset value being different from the first offset; notifying the first offset and the second offset to a communication partner apparatus; receiving from the communication partner apparatus the first SRS transmitted at the transmission power controlled by the first offset and at a first transmission time interval,. and the second SRS transmitted at the transmission power controlled by the second offset and at a second transmission time interval, the second transmission time interval being different from the first transmission time interval; and estimating channel quality of an uplink data channel based on the received first SRS and the received second SRS. - View Dependent Claims (7, 8, 9, 10)
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Specification