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US 2018/0123655 A1Published application
Data feedback methods and related apparatuses
AssigneeHuawei Technologies Co., Ltd.
InventorsZongming YAO, Menghong LIU, Linfeng XIA
Life of this patent
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Abstract
A data feedback method includes acquiring, by the beamformee, the number of columns from a null data packet announcement (NDPA) message; detecting the number of active first spatial streams; comparing the number of first spatial streams with the number of columns, and taking the smaller value obtained from the comparison as the number of second spatial streams required for feedback; and feeding back the number of second spatial streams and spatial stream measurement information about the second spatial streams to the beamformer.
Claims10
A data feedback method, comprising:
- acquiring, by a beamformee, a quantity of columns from a null data packet announcement (NDPA) message;
- detecting, by the beamformee, a quantity of active first spatial streams;
- comparing, by the beamformee, a quantity of first spatial streams and the quantity of columns;
- determining a smaller value obtained from the comparison to be a quantity of second spatial streams required for feedback;
- and
- feeding back, by the beamformee, the quantity of second spatial streams and spatial stream measurement information about the second spatial streams to a beamformer;
- wherein:
- the detecting, by the beamformee, the quantity of active first spatial streams comprises:
- detecting spatial streams where data transmission exists and determining the quantity of the active first spatial streams.
6 more elements
A beamformee, comprising:
- a first acquiring unit configured to acquire a quantity of columns from a null data packet announcement (NDPA) message;
- a detection unit configured to detect a quantity of active first spatial streams;
- a comparison unit configured to compare a quantity of first spatial streams with the quantity of columns;
- a determination unit configured to determine a smaller value obtained from the comparison to be a number of second spatial streams required for feedback;
- and
- a feeding back unit, configured to feed back the number of second spatial streams and spatial stream measurement information about the second spatial streams to a beamformer;
- wherein the detection unit is configured to detect spatial streams where data transmission exists and determine the quantity of the active first spatial streams.
4 more elements
Dependencies are inferred from the claim text.