US 12,232,185 B2
Random access method and terminal device
Weijie Xu, Dongguan (CN); Zuomin Wu, Dongguan (CN); and Zhenshan Zhao, Dongguan (CN)
Assigned to GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Dongguan (CN)
Filed by GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Dongguan (CN)
Filed on Apr. 27, 2022, as Appl. No. 17/731,121.
Application 17/731,121 is a continuation of application No. PCT/CN2019/123107, filed on Dec. 4, 2019.
Prior Publication US 2022/0256619 A1, Aug. 11, 2022
Int. Cl. H04W 74/0833 (2024.01); H04L 5/14 (2006.01); H04W 72/0446 (2023.01); H04W 74/00 (2009.01); H04W 74/08 (2009.01)
CPC H04W 74/0841 (2013.01) [H04L 5/1469 (2013.01); H04W 72/0446 (2013.01); H04W 74/006 (2013.01); H04W 74/0866 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method of random access, comprising:
determining, by a terminal device based on a predetermined rule, whether to cancel transmission of a first uplink channel on a first transmission occasion, the first uplink channel being a Physical Random Access Channel PRACH in a first message of a 2-step random access procedure, and the first transmission occasion being a transmission occasion corresponding to the PRACH; and
when the terminal device determines to cancel the transmission of the PRACH, cancelling the transmission of the PRACH and not transmitting a second uplink channel by the terminal device, the second uplink channel being a Physical Uplink Shared Channel PUSCH in the first message of the 2-step random access procedure,
wherein the determining, by the terminal device based on the predetermined rule, whether to cancel the transmission of the first uplink channel on the first transmission occasion comprises that:
on a Time Division Duplex TDD single carrier, for a set of symbols in the first transmission occasion that are configured by a higher layer for transmission of the first uplink channel, if the terminal device detects a second Downlink Control Information DCI indicating to the terminal device to receive a downlink channel in a subset of symbols from the set of symbols, the terminal device determines to cancel the transmission of the first uplink channel after a first time point, the first time point being a time point after a time length T from a last symbol of a control resource set where the second DCI is detected by the terminal device, wherein the time length T is time for channel processing.