US 12,341,617 B2
Method and apparatus for improving HARQ in a non-terrestrial network
Mythri Hunukumbure, Staines (GB)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Appl. No. 17/629,968
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
PCT Filed Jun. 23, 2020, PCT No. PCT/KR2020/008098
§ 371(c)(1), (2) Date Jan. 25, 2022,
PCT Pub. No. WO2021/020735, PCT Pub. Date Feb. 4, 2021.
Claims priority of application No. 1910721 (GB), filed on Jul. 26, 2019; and application No. 10-2020-0075530 (KR), filed on Jun. 22, 2020.
Prior Publication US 2022/0255673 A1, Aug. 11, 2022
Int. Cl. H04L 1/1867 (2023.01); H04B 17/318 (2015.01); H04L 1/00 (2006.01); H04W 84/06 (2009.01)
CPC H04L 1/189 (2013.01) [H04B 17/318 (2015.01); H04L 1/0003 (2013.01); H04L 1/0009 (2013.01); H04L 1/0013 (2013.01); H04L 1/0026 (2013.01); H04L 1/1896 (2013.01); H04W 84/06 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method performed by a base station in a wireless communication system, the method comprising:
identifying an average fade duration of a block fade based on a pattern of a hybrid automatic repeat request acknowledgment (HARQ-ACK) received from a user equipment (UE) via a physical uplink control channel (PUCCH); and
in response to identifying the average fade duration of the block fade:
identifying a number of re-transmissions based on the average fade duration, wherein the re-transmissions are spaced at a time interval greater than the average fade duration,
transmitting, to the UE, an average spectral efficiency (SE) level corresponding to a duty cycle of UE channel quality indicator (CQI) reporting via radio resource control (RRC) signaling,
transmitting, to the UE, downlink control information (DCI) allocating a modulation and coding scheme (MCS) level according to a channel state in which a fade does not exist, wherein the DCI indicates that data is repeatedly transmitted, and
repeatedly transmitting, to the UE, data by using at least two symbols that have the time interval,
wherein the average fade duration is indicated to the UE based on a ratio of a SE level associated with the MCS level and the average SE level transmitted to the UE.