US 12,328,772 B1
Performing random access procedure in a wireless communication system
Kenneth McClure, Midlothian, TX (US)
Assigned to AerKodo, LLC, Midlothian, TX (US)
Filed by AerKodo, LLC, Midlothian, TX (US)
Filed on Dec. 30, 2024, as Appl. No. 19/006,097.
Claims priority of provisional application 63/720,132, filed on Nov. 13, 2024.
Int. Cl. H04W 74/0836 (2024.01); H04B 17/318 (2015.01)
CPC H04W 74/0836 (2024.01) [H04B 17/328 (2023.05)] 20 Claims
OG exemplary drawing
 
1. A method performed by a UE, the method comprising:
initiating a random access (RA) procedure, by a reconfiguration with sync, for a bandwidth part (BWP);
determining whether or not the reconfiguration with sync was initiated for recovery using a lower-layer triggered mobility (LTM) candidate configuration;
in circumstances where the reconfiguration with sync was not initiated for recovery using an LTM candidate configuration:
determining whether or not the BWP was configured with dedicated contention free RA resources for a 4-step RA type;
in circumstances where the BWP was configured with the dedicated contention free RA resources for the 4-step RA type, performing 4-step RA;
in circumstances where the BWP was not configured with the dedicated contention free RA resources for the 4-step RA type:
determining whether or not the BWP was configured with dedicated contention free RA resources for a 2-step RA type;
in circumstances where the BWP was configured with the dedicated contention free RA resources for the 2-step RA type, performing 2-step RA;
in circumstances where the BWP was not configured with the dedicated contention free RA resources for the 2-step RA type, performing 4-step RA; and
in circumstances where the reconfiguration with sync was initiated for recovery using an LTM candidate configuration:
determining that the BWP is configured with RA resources for 2-step RA type;
determining whether or not the BWP is configured with RA resources for 4-step RA type;
in circumstances where the BWP is not configured with RA resources for 4-step RA type random access, performing 2-step RA;
in circumstances where the BWP is configured with RA resources for 4-step RA type:
determining whether or not a measured reference signal received power (RSRP) of a downlink pathloss reference is above a message-A threshold;
in circumstances where the measured RSRP of the downlink pathloss reference is above the message-A threshold, performing 2-step RA; and
in circumstances where the measured RSRP of the downlink pathloss reference is not above the message-A threshold, performing 4-step RA.