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US 2022/0029683 A1Published application
Beam-strength related type-ii channel state information coefficient feedback
AssigneeQUALCOMM Incorporated
InventorsQiaoyu LI, Min HUANG, Liangming WU, Chenxi HAO, Chao WEI
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Abstract
Certain aspects of the present disclosure provide techniques for reporting beam-strength related Type-II channel state information (CSI) coefficient feedback.
Claims30
A method for wireless communications by a UE, comprising:
- measuring beam-specific amplitude levels of a plurality of beams based at least on channel state information reference signals (CSI-RS);
- selecting transfer domain coefficients for each beam, wherein a quantity of transfer domain coefficients selected for each beam is based at least on the corresponding beam-specific amplitude level;
- determining a quantity of bits used for reporting a UE-specific amplitude and phase for each selected coefficient, wherein the quantity of bits is based at least on the beam-specific amplitude level of the beam associated with the particular selected coefficient;
- and
- reporting feedback information to the BS, as a part of CSI feedback, the feedback information comprising:
- the measured beam-specific amplitude levels;
- and
- a difference on the quantity of selected coefficients for a first beam-specific amplitude level compared to a second beam-specific amplitude level, wherein the second beam-specific amplitude level has one of a stronger amplitude level and a weaker amplitude level compared to the first beam-specific amplitude level, and the coefficient-specific amplitude and phase information for the selected coefficients.
5 more elements
A method for wireless communications by a base station (BS), comprising:
- transmitting channel state information reference signals (CSI-RS) to a user equipment (UE);
- receiving, from the UE, feedback information as a part of CSI feedback, the feedback information comprising:
- measured beam-specific amplitude levels for a plurality of beams;
- a difference on a first quantity of selected coefficients for a first beam-specific amplitude level compared to a second beam-specific amplitude level, wherein the second beam-specific amplitude level has one of a stronger amplitude level and a weaker amplitude level compared to the first beam-specific amplitude level, and
- coefficient-specific amplitude and phase information for the selected transfer domain coefficients;
- and
- adjusting a configuration of one or more antennas of the BS based on the feedback information.
4 more elements
An apparatus for wireless communications, comprising:
- means for measuring beam-specific amplitude levels of a plurality of beams based at least on channel state information reference signals (CSI-RS);
- means for selecting transfer domain coefficients for each beam, wherein a quantity of transfer domain coefficients selected for each beam is based at least on the corresponding beam-specific amplitude level;
- means for determining a quantity of bits used for reporting a UE-specific amplitude and phase for each selected coefficient, wherein the quantity of bits is based at least on the beam-specific amplitude level of the beam associated with the particular selected coefficient;
- and
- means for reporting feedback information to the BS, as a part of CSI feedback, the feedback information comprising:
- the measured beam-specific amplitude levels;
- and
- a difference on the quantity of selected coefficients for a first beam-specific amplitude level compared to a second beam-specific amplitude level, wherein the second beam-specific amplitude level has one of a stronger amplitude level and a weaker amplitude level compared to the first beam-specific amplitude level, and the coefficient-specific amplitude and phase information for the selected coefficients.
5 more elements
An apparatus for wireless communications, comprising:
- means for transmitting channel state information reference signals (CSI-RS) to a user equipment (UE);
- means for receiving, from the UE, feedback information as a part of CSI feedback, the feedback information comprising:
- measured beam-specific amplitude levels for a plurality of beams;
- a difference on a first quantity of selected coefficients for a first beam-specific amplitude level compared to a second beam-specific amplitude level, wherein the second beam-specific amplitude level has one of a stronger amplitude level and a weaker amplitude level compared to the first beam-specific amplitude level, and
- coefficient-specific amplitude and phase information for the selected transfer domain coefficients;
- and
- means for adjusting a configuration of one or more antennas of the BS based on the feedback information.
4 more elements
Dependencies are inferred from the claim text.