US 12,114,375 B2
Random access method and apparatus, and user equipment and network device
Cong Shi, Guangdong (CN)
Assigned to GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Guangdong (CN)
Filed by GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Guangdong (CN)
Filed on Aug. 15, 2022, as Appl. No. 17/887,511.
Application 17/887,511 is a continuation of application No. 17/475,368, filed on Sep. 15, 2021, granted, now 11,438,936.
Application 17/475,368 is a continuation of application No. PCT/CN2019/084154, filed on Apr. 24, 2019.
Prior Publication US 2022/0394760 A1, Dec. 8, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 74/0833 (2024.01); H04W 72/1263 (2023.01); H04W 74/00 (2009.01); H04W 80/02 (2009.01)
CPC H04W 74/085 (2013.01) [H04W 72/1263 (2013.01); H04W 74/006 (2013.01); H04W 80/02 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A random access method, the method comprising:
detecting a scheduling instruction of a second message in a first window after a user equipment (UE) sends a first message, wherein the first message comprises a preamble and an uplink data channel;
the second message comprising at least one of the following: a first conflict resolution identifier, a second conflict resolution identifier, first indication information, and second indication information, wherein the first conflict resolution identifier is used for conflict resolution of a connected UE; the second conflict resolution identifier is used for conflict resolution of an idle UE, an inactive UE, or the connected UE; the first indication information is used for indicating that a two-step random access process returns to a four-step random access process;
the second message comprises a media access control (MAC) protocol data unit (PDU), and the MAC PDU comprises at least one of the following:
the second conflict resolution identifier; and
a random access response (RAR), and the RAR is used to indicate that the two-step random access process returns to the four-step random access process, wherein
the MAC PDU comprises a plurality of MAC sub-PDUs, which comprise a first sub-header and a target MAC sub-PDU, the first sub-header carries third indication information, and the third indication information is used to indicate a type of the target MAC sub-PDU, and the type of the target MAC sub-PDU refers to a second MAC sub-PDU or a third MAC sub-PDU, the first sub-header further carries second type information, and the second type information is used to indicate whether the first sub-header contains random access preamble ID (RAPID) or backoff indication (BI) information with backoff indication.