	US 12,395,914 B2
	Method for operating UE related to relay in wireless communication system
Seoyoung Back, Seoul (KR); Giwon Park, Seoul (KR); Seungmin Lee, Seoul (KR); and Jongyoul Lee, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 18/011,456
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Jun. 21, 2021, PCT No. PCT/KR2021/007725 § 371(c)(1), (2) Date Dec. 19, 2022, PCT Pub. No. WO2021/256908, PCT Pub. Date Dec. 23, 2021.
Claims priority of application No. 10-2020-0075096 (KR), filed on Jun. 19, 2020; and application No. 10-2020-0079699 (KR), filed on Jun. 30, 2020.
Prior Publication US 2023/0362773 A1, Nov. 9, 2023
Int. Cl. H04W 88/04 (2009.01); H04W 36/00 (2009.01); H04W 36/30 (2009.01)

CPC H04W 36/305 (2018.08) [H04W 36/033 (2023.05); H04W 88/04 (2013.01)]

11 Claims

1. A method comprising:

establishing, by a relay User Equipment (UE), a connection with a remote UE;

transmitting or receiving, by the relay UE, a packet related to the remote UE; and

declaring, by the relay UE, a Radio Link Failure (RLF),

wherein the RLF is related to a Uu link, and

wherein the relay UE transmits a message informing the remote UE of the RLF,

wherein the RLF is declared based on the relay UE failing to receive an Acknowledgement (ACK) until a maximum retransmission number for the Uu link,

wherein the relay UE triggers relay reselection based on the relay UE failing to receive an ACK until a maximum retransmission number for sidelink,

wherein the maximum retransmission number for sidelink is smaller than the maximum retransmission number for the Uu link.