US 11,895,718 B2
Method of and apparatus for transmitting data based on channel state in device-to-device communication
Kunil Yum, Seoul (KR); Yangsoo Kwon, Seoul (KR); Jungmin Park, Seoul (KR); and Junho Lee, Hwaseong-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Feb. 26, 2021, as Appl. No. 17/187,052.
Claims priority of provisional application 62/982,357, filed on Feb. 27, 2020.
Claims priority of application No. 10-2020-0107403 (KR), filed on Aug. 25, 2020.
Prior Publication US 2021/0274578 A1, Sep. 2, 2021
Int. Cl. H04W 76/14 (2018.01); H04B 7/01 (2006.01); H04B 7/06 (2006.01); H04L 1/00 (2006.01); H04W 24/10 (2009.01); H04W 72/51 (2023.01)
CPC H04W 76/14 (2018.02) [H04B 7/01 (2013.01); H04B 7/0626 (2013.01); H04L 1/0003 (2013.01); H04W 24/10 (2013.01); H04W 72/51 (2023.01)] 18 Claims
OG exemplary drawing
 
1. A method of performing device-to-device (D2D) communication by a first device, the method comprising:
in a first mode:
receiving at least one first reference signal from a second device;
estimating a channel state based on the at least one first reference signal; and
determining a plurality of transmission parameters based on the estimated channel state; or
in a second mode:
transmitting at least one second reference signal to the second device;
receiving channel state information from the second device corresponding to the at least one second reference signal; and
determining the plurality of transmission parameters based on the channel state information; and
in the first mode or the second mode:
obtaining at least one measurement value corresponding to a relative velocity between the first device and the second device;
adjusting at least one transmission parameter, among the plurality of transmission parameters, based on the at least one measurement value;
providing the adjusted at least one transmission parameter to the second device; and
transmitting data to the second device based on the adjusted at least one transmission parameter,
wherein the first mode is a channel reciprocity mode and the second mode is a channel state information feedback mode.