US 12,035,361 B2
UE-initiated channel access procedure in wireless communication on shared spectrum
Hong He, San Jose, CA (US); Chunhai Yao, Beijing (CN); Chunxuan Ye, San Diego, CA (US); Dawei Zhang, Saratoga, CA (US); Haitong Sun, Cupertino, CA (US); Jie Cui, San Jose, CA (US); Oghenekome Oteri, San Diego, CA (US); Sigen Ye, Whitehouse Station, NJ (US); Wei Zeng, Saratoga, CA (US); Weidong Yang, San Diego, CA (US); Yang Tang, San Jose, CA (US); and Yushu Zhang, Beijing (CN)
Assigned to Apple Inc., Cupertino, CA (US)
Appl. No. 17/310,095
Filed by Apple Inc., Cupertino, CA (US)
PCT Filed Aug. 5, 2020, PCT No. PCT/CN2020/107228
§ 371(c)(1), (2) Date Jul. 16, 2021,
PCT Pub. No. WO2022/027377, PCT Pub. Date Feb. 10, 2022.
Prior Publication US 2022/0322425 A1, Oct. 6, 2022
Int. Cl. H04W 74/08 (2024.01); H04W 72/1268 (2023.01)
CPC H04W 74/08 (2013.01) [H04W 72/1268 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A user equipment (UE), comprising:
a transceiver configured to connect to a base station (BS) over a shared channel subject to channel access operations; and
one or more processors communicatively coupled to the transceiver and configured to perform operations comprising:
receiving a first configuration for a BS-initiated fixed frame period (FFP) (BS-FFP) and a second configuration for a UE-initiated FFP (UE-FFP);
determining that no downlink (DL) transmissions are detected during a predefined time of the BS-FFP;
determining that at least one condition associated with an uplink (UL) transmission is satisfied;
when no downlink (DL) transmissions are detected during the predefined time of the BS-FFP and the at least one condition is satisfied, performing a UE-initiated channel access operation;
when the UE-initiated channel access operation is successful, performing the UL transmission during the UE-FFP; and
transmitting, to the BS, a row index of a table, wherein the row index indicates a number of slots for sharing, an offset indicating where the UL transmission starts, and a priority for the UL transmission.