US 12,250,716 B2
User equipment and base station performing transmission and reception operations
Quan Kuang, Langen (DE); Hidetoshi Suzuki, Kanagawa (JP); and Hongchao Li, Langen (DE)
Assigned to Panasonic Intellectual Property Corporation of America, Torrance, CA (US)
Appl. No. 17/618,403
Filed by Panasonic Intellectual Property Corporation of America, Torrance, CA (US)
PCT Filed Jul. 23, 2020, PCT No. PCT/EP2020/070778
§ 371(c)(1), (2) Date Dec. 10, 2021,
PCT Pub. No. WO2021/023518, PCT Pub. Date Nov. 11, 2021.
Claims priority of application No. 19189920 (EP), filed on Aug. 2, 2019.
Prior Publication US 2022/0312478 A1, Sep. 29, 2022
Int. Cl. H04W 74/08 (2024.01); H04W 16/14 (2009.01); H04W 74/0808 (2024.01); H04W 74/0833 (2024.01)
CPC H04W 74/0808 (2013.01) [H04W 16/14 (2013.01); H04W 74/0833 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A user equipment (UE) comprising:
a processor, which in operation, configures, based on a received unlicensed channel access configuration, at least one symbol of an occupancy time of the unlicensed channel for uplink communication;
a receiver, which in operation, receives an indication of a timing of channel resources which are to be used for a physical random access channel (PRACH) transmission, and receives an indication of a gap duration;
the processor, in operation, determines whether or not the indicated timing of channel resources which are to be used for the PRACH transmission is included within the at least one symbol configured for uplink communication;
the processor, in operation and in case the determination is affirmative, performs a clear channel assessment (CCA) for the gap duration before the start of the indicated timing of channel resources which are to be used for the PRACH transmission; and
a transmitter, which in operation and in case the CCA is affirmative, performs the PRACH transmission by transmitting a random access (RA) preamble within the at least one symbol configured for uplink communication at the indicated timing of channel resources which are to be used for the PRACH transmission,
wherein the indication of the gap duration is an indication of one of plural gap durations in combination with an indication of one of plural listen-before-talk (LBT) categories, including a first indication which indicates 16 μs in combination with LBT category 1, and a second indication which indicates 16 μs in combination with LBT category 2.