US 12,075,263 B2
Methods and apparatus for beamforming and initial access
Moon-il Lee, Melville, NY (US); Janet A. Stern-Berkowitz, Little Neck, NY (US); Virgil Comsa, Montreal (CA); and Meilong Jiang, Westfield, NJ (US)
Assigned to InterDigital Patent Holdings, Inc., Wilmington, DE (US)
Filed by InterDigital Patent Holdings, Inc., Wilmington, DE (US)
Filed on Apr. 25, 2023, as Appl. No. 18/306,792.
Application 18/306,792 is a continuation of application No. 17/346,716, filed on Jun. 14, 2021, granted, now 11,638,163.
Application 17/346,716 is a continuation of application No. 16/538,379, filed on Aug. 12, 2019, granted, now 11,082,863, issued on Aug. 3, 2021.
Application 16/538,379 is a continuation of application No. 15/669,291, filed on Aug. 4, 2017, granted, now 10,382,978, issued on Aug. 13, 2019.
Application 15/669,291 is a continuation of application No. 14/763,113, abandoned, previously published as PCT/US2014/012914, filed on Jan. 24, 2014.
Claims priority of provisional application 61/756,792, filed on Jan. 25, 2013.
Prior Publication US 2023/0269603 A1, Aug. 24, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 16/28 (2009.01); H04B 7/0417 (2017.01); H04B 7/06 (2006.01); H04B 7/08 (2006.01); H04L 5/00 (2006.01); H04W 24/10 (2009.01); H04W 52/36 (2009.01); H04W 74/0833 (2024.01)
CPC H04W 16/28 (2013.01) [H04B 7/0417 (2013.01); H04B 7/061 (2013.01); H04B 7/0617 (2013.01); H04B 7/0626 (2013.01); H04B 7/086 (2013.01); H04B 7/088 (2013.01); H04L 5/0048 (2013.01); H04W 24/10 (2013.01); H04W 52/365 (2013.01); H04W 74/0833 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for use in a wireless transmit/receive unit (WTRU) for determining resources, the method comprising:
measuring one or more of a first plurality of beam reference signals;
selecting a first beam reference signal from among the measured one or more of the first plurality of beam references signals;
determining a set of physical random access channel (PRACH) resources for the selected first beam reference signal;
measuring one or more of a second plurality of beam reference signals;
selecting a second beam reference signal from among the measured one or more of the second plurality of beam references signals; and
transmitting an indication of the selected second beam reference signal in a physical uplink shared channel (PUSCH) transmission, and a PRACH signal using at least one PRACH resource of the determined set of PRACH resources.