US 12,244,376 B2
Beamforming scheme in higher rank transmission
Di Liu, Beijing (CN); Chao Han, Beijing (CN); Pengpeng Song, Beijing (CN); and Lili Wang, Beijing (CN)
Assigned to NOKIA SOLUTIONS AND NETWORKS OY, Espoo (FI)
Appl. No. 17/778,336
Filed by NOKIA SOLUTIONS AND NETWORKS OY, Espoo (FI)
PCT Filed Sep. 1, 2020, PCT No. PCT/CN2020/112898
§ 371(c)(1), (2) Date May 19, 2022,
PCT Pub. No. WO2022/047631, PCT Pub. Date Mar. 10, 2022.
Prior Publication US 2023/0018285 A1, Jan. 19, 2023
Int. Cl. H04B 7/06 (2006.01); H04B 7/0456 (2017.01)
CPC H04B 7/0617 (2013.01) [H04B 7/0456 (2013.01); H04B 7/0626 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
at least one processor; and
at least one memory including computer program code;
the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus to:
determine a target beam for carrying a transmission of a reference signal from the apparatus to a user equipment, wherein the apparatus is caused to determine the target beam by:
performing a measurement on a channel for receiving a sounding reference signal configured to be used to determine the target beam based on a result of the measurement from the user equipment; and
determining the target beam based on the result of the measurement on the sounding reference signal, wherein the target beam is configured to be mapped onto a plurality of channel state information reference signal ports in a same polarization;
determine a target arrangement of a plurality of ports formed at an antenna array of the apparatus, wherein the apparatus is caused to determine the target arrangement by:
determining a set of candidate arrangements of the plurality of ports by segmenting antennas in the antenna array along at least one of a vertical direction of the antenna array and a horizontal direction of the antenna array; and
determining the target arrangement of the plurality of ports from the set of candidate arrangements from a first candidate arrangement based on first channel state information and a second candidate arrangement based on second channel state information; and
transmit, to the user equipment, different portions of the target beam through the plurality of ports based on the target arrangement.