US 12,336,014 B2
Performing a two-step random access channel procedure
Joachim Loehr, Wiesbaden (DE); Alexander Johann Maria Golitschek Edler von Elbwart, Darmstadt (DE); Prateek Basu Mallick, Dreieich (DE); and Ravi Kuchibhotla, Chicago, IL (US)
Assigned to Lenovo (Singapore) Pte. Ltd., Singapore (SG)
Filed by Lenovo (Singapore) PTE. LTD., New Tech Park (SG)
Filed on Apr. 5, 2023, as Appl. No. 18/296,212.
Application 18/296,212 is a continuation of application No. 17/515,770, filed on Nov. 1, 2021, granted, now 11,653,391.
Application 17/515,770 is a continuation of application No. 16/584,249, filed on Sep. 26, 2019, granted, now 11,166,319, issued on Nov. 2, 2021.
Claims priority of provisional application 62/736,928, filed on Sep. 26, 2018.
Prior Publication US 2023/0239934 A1, Jul. 27, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 74/08 (2024.01); H04L 5/00 (2006.01); H04W 72/0446 (2023.01); H04W 74/0833 (2024.01); H04W 76/11 (2018.01); H04W 80/02 (2009.01)
CPC H04W 74/0833 (2013.01) [H04L 5/0094 (2013.01); H04W 72/0446 (2013.01); H04W 76/11 (2018.02); H04W 80/02 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A user equipment (UE), comprising:
a processor; and
a memory coupled with the processor, the memory comprising instructions executable by the processor to cause the UE to:
receive, from a base station, a configuration indicating whether a two-step random access procedure and a four-step random access procedure are allowed to be performed by the UE;
determine whether one or more random access resources are configured for the two-step random access procedure and the four-step random access procedure based at least in part on the received configuration;
determine whether to perform the two-step random access procedure or the four-step random access procedure based on the received configuration and a reference signal received power (RSRP) associated with a pathloss reference satisfying a threshold;
select the two-step random access procedure based at least in part on the received configuration and the RSRP;
transmit a random access message associated with the selected two-step random access procedure, including a first transmission of a random access preamble associated with the random access message at a first time and a second transmission of a payload associated with the random access message at a second time offset from the first time, wherein the offset is based on a subcarrier spacing; and
receive a random access response message during a response window and based at least in part on the transmitted random access message, wherein the random access response message is associated with a radio network temporary identifier (RNTI).