US 12,452,811 B2
Method and apparatus for sidelink synchronization signal transmission and reception in communication system based on unlicensed band
Sungjin Park, Suwon-si (KR); Hyunseok Ryu, Suwon-si (KR); Kyoungmin Park, Suwon-si (KR); and Cheolkyu Shin, Suwon-si (KR)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on May 10, 2023, as Appl. No. 18/315,094.
Claims priority of application No. 10-2022-0058598 (KR), filed on May 12, 2022.
Prior Publication US 2023/0370987 A1, Nov. 16, 2023
Int. Cl. H04W 56/00 (2009.01); H04W 16/14 (2009.01); H04W 92/18 (2009.01)
CPC H04W 56/0015 (2013.01) [H04W 16/14 (2013.01); H04W 92/18 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method performed by a user equipment (UE) in a wireless communication system, the method comprising:
identifying that a frequency band in which the UE operates corresponds to an unlicensed spectrum;
identifying a period for a transmission of a sidelink synchronization signal block (S-SSB) and a subcarrier spacing associated with the S-SSB;
identifying a number of S-SSB transmissions within the period, for the unlicensed spectrum; and
transmitting at least one S-SSB based on the number of S-SSB transmissions, in the unlicensed spectrum,
wherein the number of S-SSB transmissions relates to the subcarrier spacing,
wherein the number of S-SSB transmissions for the unlicensed spectrum is greater than a number of S-SSB transmissions for a licensed spectrum, and
wherein transmitting the at least one S-SSB includes:
identifying whether a first channel access procedure for transmitting a S-SSB fails on a first resource among resources corresponding to the number of S-SSB transmissions for the unlicensed spectrum,
in case that the first channel access procedure is fails, performing a second channel access procedure on a second resource among the resources corresponding to the number of S-SSB transmissions, and
in case that the second channel access procedure succeeds, transmitting a S-SSB on the second resource.