US 12,489,504 B2
Uplink control information
Filippo Tosato, Bures sur Yvette (FR); Marco Maso, Issy les Moulineaux (FR); Nhat-Quang Nhan, Reims (FR); and Hao Liu, Pudong (CN)
Assigned to NOKIA TECHNOLOGIES OY, Espoo (FI)
Filed by Nokia Technologies Oy, Espoo (FI)
Filed on Dec. 19, 2023, as Appl. No. 18/545,259.
Application 18/545,259 is a continuation of application No. 17/730,915, filed on Apr. 27, 2022, granted, now 11,909,484.
Application 17/730,915 is a continuation of application No. 17/067,076, filed on Oct. 9, 2020, granted, now 11,336,356, issued on May 17, 2022.
Application 17/067,076 is a continuation of application No. 16/838,300, filed on Apr. 2, 2020, granted, now 10,848,229, issued on Nov. 24, 2020.
Claims priority of application No. PCT/CN2019/081612 (WO), filed on Apr. 4, 2019.
Prior Publication US 2024/0137090 A1, Apr. 25, 2024
Int. Cl. H04B 7/06 (2006.01); H04B 7/0456 (2017.01); H04L 1/1607 (2023.01); H04W 72/21 (2023.01); H04W 72/23 (2023.01)
CPC H04B 7/0634 (2013.01) [H04B 7/0481 (2023.05); H04B 7/0639 (2013.01); H04L 1/1614 (2013.01); H04W 72/21 (2023.01); H04W 72/23 (2023.01)] 30 Claims
OG exemplary drawing
 
1. A method comprising:
determining, at a terminal device, a matrix W2 comprising linear combination coefficients for a pre-coder matrix indicator (PMI) matrix, wherein:
the PMI matrix is represented by W=W1W2WfH,
matrix W1 is a matrix of size 2N1N2×2L and represents components of a spatial domain orthogonal basis of size 2L,
matrix Wf is a matrix of size N3×M and represents components of a frequency domain orthogonal basis of size M,
matrix W2 is a matrix of size 2L×M and has rows corresponding to spatial components and columns corresponding to frequency components,
N1×N2 is the number of antenna ports,
N3 is the number of configured PMI sub-bands, and
M is less than N3;
determining a shifted matrix by shifting the frequency components of matrix W2 circularly, such that a maximum coefficient of matrix W2 is located in a frequency component with a predetermined index;
generating a strongest coefficient indicator with [log2 2L] bits, based on the index of the spatial component associated with the maximum coefficient of matrix W2; and
transmitting, to a network device, uplink control information comprising the strongest coefficient indicator and values of non-zero coefficients of the shifted matrix, wherein the non-zero coefficients exclude the maximum coefficient.