US 12,250,733 B2
Random access method and device, and terminal
Chuanfeng He, Guangdong (CN)
Assigned to GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Guangdong (CN)
Filed by GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Guangdong (CN)
Filed on Jan. 18, 2022, as Appl. No. 17/578,261.
Application 17/578,261 is a continuation of application No. PCT/CN2019/097792, filed on Jul. 25, 2019.
Prior Publication US 2022/0141888 A1, May 5, 2022
Int. Cl. H04W 74/0833 (2024.01); H04L 1/08 (2006.01); H04W 74/00 (2009.01)
CPC H04W 74/0841 (2013.01) [H04L 1/08 (2013.01); H04W 74/002 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for random access, comprising:
in a case that a terminal determines fallback to a four-step random access procedure to retransmit a physical uplink shared channel (PUSCH) in a MSG A in a two-step random access procedure, completing preparation for retransmitting the PUSCH within a third time interval after a physical downlink shared channel (PDSCH), the MSG A comprising a physical random access channel (PRACH) and the PUSCH,
wherein the PDSCH is used for carrying a MSG B in the two-step random access procedure, and the MSG B in the two-step random access procedure is a response message to the MSG-A;
wherein the third time interval comprises first time, the first time being preparation time of the terminal for the PUSCH; wherein a duration of the first time is N2 symbols, and N2 is related to the terminal's processing capability related to the preparation time for the PUSCH;
the third time interval further comprises second time, the second time being processing time of the terminal for the PDSCH, wherein a duration of the second time is N1 symbols, and N1 is related to the terminal's processing capability related to the preparation time for the PDSCH; wherein the third time interval further comprises a second fixed time length.