US 12,081,299 B2
Channel state information reporting method and device
Zhengxuan Liu, Beijing (CN); Hui Li, Beijing (CN); and Qiubin Gao, Beijing (CN)
Assigned to DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD., Beijing (CN)
Appl. No. 17/441,677
Filed by DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD., Beijing (CN)
PCT Filed Dec. 24, 2019, PCT No. PCT/CN2019/128026
§ 371(c)(1), (2) Date Sep. 21, 2021,
PCT Pub. No. WO2020/186871, PCT Pub. Date Sep. 24, 2020.
Claims priority of application No. 201910215992.2 (CN), filed on Mar. 21, 2019.
Prior Publication US 2022/0149909 A1, May 12, 2022
Int. Cl. H04B 7/06 (2006.01); H04B 7/0456 (2017.01)
CPC H04B 7/0626 (2013.01) [H04B 7/0456 (2013.01); H04B 7/0658 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for reporting channel state information, comprising:
determining, by a terminal, codebook indication information corresponding to a data transmission layer according to codebook parameter information; wherein the codebook indication information comprises a part or all of following information:
beam information for determining orthogonal beams in a precoding matrix, base vector information for determining compression base vectors in the precoding matrix, and non-zero coefficient indication information for determining compression coefficients in the precoding matrix;
sending, by the terminal, Channel State Information, CSI, containing the codebook indication information to a network side device;
wherein, the codebook indication information comprises the beam information for determining orthogonal beams in the precoding matrix, and the terminal determines the beam information by:
taking, by the terminal, combination index information as the beam information corresponding to the data transmission layer, wherein the combination index information has X bits, X is determined according to a quantity of candidate orthogonal beams and a quantity of orthogonal beams for the data transmission layer, and the combination index information indicates a position of a combination of orthogonal beams for the data transmission layer in all combinations of the candidate orthogonal beams:
the codebook indication information comprises the base vector information for determining compression base vectors in the precoding matrix, and the terminal determines the base vector information by:
taking, by the terminal, combination index information as the base vector information corresponding to the data transmission layer, wherein the combination index information has X bits, X is determined according to a quantity of candidate compression base vectors and a quantity of compression base vectors for the data transmission layer, and the combination index information indicates a position of a combination of compression base vectors for the data transmission layer in all combinations of the candidate compression base vectors;
the codebook indication information comprises the non-zero coefficient indication information for determining compression coefficients in the precoding matrix, and the terminal determines the non-zero coefficient indication information by:
taking, by the terminal, a bitmap as the non-zero coefficient indication information corresponding to the data transmission layer, wherein bits in the bitmap correspond to candidate non-zero coefficient positions, and a value on each bit indicates whether the data transmission layer uses a non-zero coefficient position corresponding to each bit.