US 11,929,807 B2
Method for transmitting and receiving channel state information in wireless communication system and device therefor
Hyungtae Kim, Seoul (KR); Haewook Park, Seoul (KR); and Jiwon Kang, Seoul (KR)
Assigned to LG ELECTRONICS INC., (KR)
Appl. No. 17/266,992
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Aug. 8, 2019, PCT No. PCT/KR2019/009965
§ 371(c)(1), (2) Date Feb. 8, 2021,
PCT Pub. No. WO2020/032617, PCT Pub. Date Feb. 13, 2020.
Claims priority of application No. 10-2018-0092564 (KR), filed on Aug. 8, 2018.
Prior Publication US 2021/0314046 A1, Oct. 7, 2021
Int. Cl. H04B 7/06 (2006.01); H04B 7/0456 (2017.01); H04L 5/00 (2006.01); H04W 72/21 (2023.01)
CPC H04B 7/0626 (2013.01) [H04B 7/0456 (2013.01); H04L 5/0053 (2013.01); H04W 72/21 (2023.01)] 14 Claims
OG exemplary drawing
 
1. A method for transmitting, by a terminal supporting a plurality of linearly combined beams, channel state information (CSI) via a plurality of physical uplink control channels (PUCCHs) in a wireless communication system, the method comprising:
receiving, from a base station, configuration information related to a CSI reporting;
transmitting, to the base station via a first PUCCH, first CSI including a precoding matrix indicator (PMI) and a rank indicator (RI), remaining CSI which can be achieved with the PMI, parameters for which linear combination (LC) codebook generation is used, and LC coefficients of a first beam set among the plurality of linearly combined beams; and
transmitting, to the base station via a second PUCCH, second CSI including channel quality information (CQI) which can be achieved based on the RI of the first CSI applied and a second beam set additionally linearly combined to the PMI of the first CSI, and LC coefficients of the second beam set excluding the first beam set among the plurality of linearly combined beams,
wherein a number of orthogonal frequency division multiplexing (OFDM) symbols for the second PUCCH is larger than a number of OFDM symbols for the first PUCCH, the first PUCCH is based on a short PUCCH format, and the second PUCCH is based on a long PUCCH format,
wherein the first PUCCH and the second PUCCH include strongest beam indices for each of layers indicated by the RI,
wherein, in case a strongest beam index for a layer is different in the first PUCCH and the second PUCCH, a strongest beam index for a layer in the second PUCCH is used for a codebook generation.