US 11,811,431 B2
Enhanced frequency compression for overhead reduction for CSI reporting and usage
Rana Ahmed Salem, Munich (DE); Filippo Tosato, Bures sur Yvette (FR); Marco Maso, Issy les Moulineaux (FR); and William Hillery, Lafayette, IN (US)
Assigned to Nokia Technologies Oy, Espoo (FI)
Filed by Nokia Technologies Oy, Espoo (FI)
Filed on Jul. 12, 2022, as Appl. No. 17/862,958.
Application 17/862,958 is a continuation of application No. 16/705,368, filed on Dec. 6, 2019, granted, now 11,424,807.
Claims priority of provisional application 62/778,011, filed on Dec. 11, 2018.
Prior Publication US 2022/0352956 A1, Nov. 3, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04B 7/06 (2006.01); H04B 7/0456 (2017.01); H04L 1/1607 (2023.01)
CPC H04B 7/0663 (2013.01) [H04B 7/0456 (2013.01); H04B 7/0626 (2013.01); H04L 1/1614 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
selecting, by a user equipment, a subset of linear combination coefficients from a two-dimensional matrix having columns of frequency domain components and rows of spatial beams components for channel state information determination, wherein the number of linear combination coefficients in the subset is less than all of the linear combination coefficients;
determining a compression matrix comprising frequency components, wherein the compression matrix comprises information associated with column indices of the selected subset of linear combination coefficients, and the compression matrix excludes the index of the column with lowest index of the two-dimensional matrix;
determining compressed channel state information which comprises (i) locations of the subset of linear combination coefficients in the two-dimensional matrix, (ii) corresponding values of the linear combination coefficients at those locations, wherein the linear combination coefficients at those locations comprises linear combination coefficients associated with the column with lowest index of the two-dimensional matrix, and (iii) the compression matrix; and
reporting, from the user equipment toward a base station, the compressed channel state information.