US 12,256,441 B2
Random access channel process using single carrier waveforms
Iyab Issam Sakhnini, San Diego, CA (US); Tao Luo, San Diego, CA (US); Xiaoxia Zhang, San Diego, CA (US); and Jun Ma, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Mar. 15, 2021, as Appl. No. 17/201,598.
Prior Publication US 2022/0295569 A1, Sep. 15, 2022
Int. Cl. H04W 74/0833 (2024.01); H04L 5/00 (2006.01); H04L 27/26 (2006.01); H04W 74/00 (2009.01); H04W 74/0836 (2024.01)
CPC H04W 74/0841 (2013.01) [H04L 5/0051 (2013.01); H04L 27/26025 (2021.01); H04L 27/2607 (2013.01); H04L 27/2636 (2013.01); H04W 74/002 (2013.01)] 30 Claims
OG exemplary drawing
 
1. An apparatus for wireless communication configured to utilize a single carrier waveform, comprising:
one or more processors; and
a memory comprising computer-executable instructions, wherein the one or more processors are configured to execute the computer-executable instructions and cause a base station to:
determine a random access configuration to configure at least one user equipment (UE) with a two-step random access channel (RACH) process configured with the single carrier waveform,
wherein the two-step RACH process comprises a communication of a first message that includes a preamble portion including a physical random access channel (PRACH) message and further includes a payload portion including a physical uplink shared channel (PUSCH) message,
wherein the one or more processors configured to cause the base station to determine the random access configuration are configured to cause the base station to determine the random access configuration to exclude a demodulation reference signal (DMRS) from the payload portion when the single carrier waveform is utilized based on satisfaction of one or more conditions comprising a transmission power for a transmission of the preamble portion being the same as a transmission power for a transmission of the payload portion;
generate configuration information including the random access configuration indicating the two-step RACH process, the configuration information including a configuration for the transmission of the preamble portion and the transmission of the payload portion without the DMRS based on the satisfaction of the one or more conditions;
transmit the configuration information to the at least one UE; and
receive, from the at least one UE and based on the configuration information, a first RACH message that includes the preamble portion and the payload portion without the DMRS, using the single carrier waveform.