US 12,476,683 B2
Wireless communication device for transmitting and receiving reference signals and operating method thereof
Hongsik Yoon, Suwon-si (KR); and Jungmin Park, Suwon-si (KR)
Assigned to Samsung Electronics Co., Ltd., Gyeonggi-do (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Sep. 7, 2022, as Appl. No. 17/939,200.
Claims priority of application No. 10-2021-0118961 (KR), filed on Sep. 7, 2021; and application No. 10-2022-0077084 (KR), filed on Jun. 23, 2022.
Prior Publication US 2023/0079252 A1, Mar. 16, 2023
Int. Cl. H04B 7/06 (2006.01); H04L 25/02 (2006.01); H04B 17/309 (2015.01)
CPC H04B 7/0626 (2013.01) [H04L 25/0224 (2013.01); H04B 17/309 (2015.01); H04L 25/0202 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An operating method of a user equipment (UE), the operating method comprising:
receiving channel state information-reference signal (CSI-RS) configuration information from a base station, the CSI-RS configuration information including time and frequency location information of a first CSI-RS, and the first CSI-RS corresponding to a first density value of 0.5, 1 or 3;
determining whether to request a second CSI-RS having a second density value based on a comparison between a first delay spread and a reference value, the second density value being different from the first density value, the first delay spread corresponding to a channel between the UE and the base station, and the first delay spread being determined from the first CSI-RS;
transmitting a CSI-RS density change request message to the base station in response to determining to request the second CSI-RS;
receiving the second CSI-RS from the base station based on the CSI-RS configuration information, the second CSI-RS being based on the CSI-RS density change request message;
estimating the channel based on the second CSI-RS to obtain a channel estimate; and
transmitting a CSI-RS report to the base station, the CSI-RS report being based on the channel estimate.