US 12,464,572 B2
BWP switching in RACH procedure
Iyab Issam Sakhnini, San Diego, CA (US); Tao Luo, San Diego, CA (US); Xiaoxia Zhang, San Diego, CA (US); and Jing Sun, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on May 10, 2022, as Appl. No. 17/662,838.
Claims priority of provisional application 63/187,316, filed on May 11, 2021.
Prior Publication US 2022/0369384 A1, Nov. 17, 2022
Int. Cl. H04W 74/0833 (2024.01); H04L 27/26 (2006.01); H04W 72/044 (2023.01); H04W 74/08 (2024.01)
CPC H04W 74/0841 (2013.01) [H04L 27/26025 (2021.01); H04W 72/044 (2013.01); H04W 74/0833 (2013.01); H04W 74/0866 (2013.01)] 29 Claims
OG exemplary drawing
 
1. An apparatus for wireless communication at a user equipment (UE), comprising:
memory; and
at least one processor coupled to the memory and configured to:
transmit, to a base station, a first random access message in a first bandwidth part (BWP) having a first subcarrier spacing (SCS);
switch from the first BWP to activate a second BWP after transmitting the first random access message, wherein the second BWP has a second SCS that is different than the first SCS;
delay, based on a BWP switch to the second BWP having a different SCS, starting a timer associated with a window of time for receiving a second random access message, wherein the delay includes a time gap associated with the BWP switch to the different SCS;
start the timer following the time gap after transmission of the first random access message in the first BWP; and
monitor for the second random access message in the second BWP prior to an expiration of the timer.
 
15. An apparatus for wireless communication at a network node, comprising:
memory; and
at least one processor coupled to the memory and configured to:
receive, from a user equipment (UE), a first random access message in a first bandwidth part (BWP);
delay, based on a BWP switch from the first BWP having a first subcarrier spacing to activate a second BWP having a different SCS, transmission of a second random access message, wherein the delay includes a time gap associated with the BWP switch to the different SCS; and
transmit the second random access message to the UE in the second BWP following the time gap after reception of the first random access message.