US 12,408,152 B2
Random access in new radio (NR) and other beamforming systems
Kyle Jung-Lin Pan, Saint James, NY (US); Janet A. Stern-Berkowitz, Little Neck, NY (US); Moon-il Lee, Melville, NY (US); and Fengjun Xi, San Diego, CA (US)
Assigned to InterDigital Patent Holdings, Inc., Wilmington, DE (US)
Filed by InterDigital Patent Holdings, Inc., Wilmington, DE (US)
Filed on Nov. 17, 2023, as Appl. No. 18/512,883.
Application 18/512,883 is a continuation of application No. 17/679,779, filed on Feb. 24, 2022, granted, now 11,871,384.
Application 17/679,779 is a continuation of application No. 17/085,903, filed on Oct. 30, 2020, granted, now 11,290,998, issued on Mar. 29, 2022.
Application 17/085,903 is a continuation of application No. 16/337,057, abandoned, previously published as PCT/US2017/054086, filed on Sep. 28, 2017.
Claims priority of provisional application 62/454,470, filed on Feb. 3, 2017.
Claims priority of provisional application 62/443,319, filed on Jan. 6, 2017.
Claims priority of provisional application 62/416,592, filed on Nov. 2, 2016.
Claims priority of provisional application 62/400,980, filed on Sep. 28, 2016.
Prior Publication US 2024/0089931 A1, Mar. 14, 2024
Int. Cl. H04W 72/044 (2023.01); H04B 7/06 (2006.01); H04W 16/28 (2009.01); H04W 56/00 (2009.01); H04W 72/30 (2023.01); H04W 74/0833 (2024.01); H04W 74/0836 (2024.01); H04W 74/0838 (2024.01)
CPC H04W 72/044 (2013.01) [H04B 7/06966 (2023.05); H04W 16/28 (2013.01); H04W 56/001 (2013.01); H04W 72/30 (2023.01); H04W 74/0833 (2013.01); H04W 74/0836 (2024.01); H04W 74/0838 (2024.01)] 20 Claims
OG exemplary drawing
 
1. A wireless transmit/receive unit (WTRU) comprising a processor and memory, the processor and memory configured to:
receive configuration information, the configuration information comprising an indication of a first set of physical random access channel (PRACH) preambles that can be used by the WTRU for a first type of random access procedure and an indication of a second set of PRACH preambles that can be used by the WTRU for a second type of random access procedure;
perform a measurement;
select a synchronization signal block from a plurality of synchronization signal blocks;
determine whether to perform the first type of random access procedure or the second type of random access procedure based on the measurement, wherein the first type of random access procedure corresponds to a four-step random access procedure and the second type of random access procedure corresponds to a two-step random access procedure;
select a PRACH preamble based on the selected synchronization signal block and the measurement, wherein the WTRU is configured to select a PRACH preamble associated with the selected synchronization signal block from the first set of random access preambles on condition that the WTRU determines to perform the first type of random access procedure based on the measurement and the WTRU is configured to select a PRACH preamble associated with the selected synchronization signal block from the second set of random access preambles on condition that the WTRU determines to perform the second type of random access procedure based on the measurement; and
transmit the selected PRACH preamble.