US 12,004,214 B2
Channel access mechanism for random access channel in unlicensed spectrum
Jiayin Zhang, Shanghai (CN); Mohamed Adel Salem, Kanata (CN); and Liqing Zhang, Ottawa (CA)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Mar. 17, 2023, as Appl. No. 18/185,556.
Application 18/185,556 is a continuation of application No. 16/999,976, filed on Aug. 21, 2020, granted, now 11,638,300.
Application 16/999,976 is a continuation of application No. PCT/CN2019/112401, filed on Oct. 22, 2019.
Claims priority of provisional application 62/751,460, filed on Oct. 26, 2018.
Prior Publication US 2023/0224962 A1, Jul. 13, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 74/0808 (2024.01); H04W 16/14 (2009.01); H04W 72/0446 (2023.01); H04W 72/0453 (2023.01); H04W 72/23 (2023.01); H04W 74/0833 (2024.01); H04W 76/27 (2018.01)
CPC H04W 74/0808 (2013.01) [H04W 16/14 (2013.01); H04W 72/0446 (2013.01); H04W 72/0453 (2013.01); H04W 72/23 (2023.01); H04W 74/0833 (2013.01); H04W 76/27 (2018.02)] 20 Claims
OG exemplary drawing
 
6. An apparatus comprising:
one or more processors; and
a non-transitory computer readable storage medium storing instructions for execution by the one or more processors, the instructions cause the apparatus to:
transmit a first message in a random access channel (RACH) resource after a first channel access procedure using a contention window size (CWS), the first message including a random access preamble;
maintain the CWS for an uplink (UL) transmission subsequent to the first message, the UL transmission to be based on receipt of a second message to be received during a message reception time window; and
transmit the UL transmission after a second channel access procedure using the CWS, wherein the first channel access procedure and the second channel access procedure are of a type 1 UL channel access procedure type.