US 12,250,677 B2
Control signaling for uplink frequency selective precoding
Yushu Zhang, Beijing (CN); Chunhai Yao, Beijing (CN); Chunxuan Ye, San Diego, CA (US); Dawei Zhang, Cupertino, CA (US); Haitong Sun, Cupertino, CA (US); Hong He, Cupertino, CA (US); Seyed Ali Akbar Fakoorian, San Diego, CA (US); Wei Zeng, Cupertino, CA (US); and Weidong Yang, San Diego, CA (US)
Assigned to APPLE INC., Cupertino, CA (US)
Filed by APPLE INC., Cupertino, CA (US)
Filed on Jul. 12, 2022, as Appl. No. 17/811,997.
Claims priority of provisional application 63/261,590, filed on Sep. 24, 2021.
Prior Publication US 2023/0094010 A1, Mar. 30, 2023
Int. Cl. H04W 72/1268 (2023.01); H04B 7/06 (2006.01); H04L 5/00 (2006.01); H04W 72/23 (2023.01)
CPC H04W 72/1268 (2013.01) [H04B 7/0639 (2013.01); H04L 5/0051 (2013.01); H04W 72/23 (2023.01)] 20 Claims
OG exemplary drawing
 
1. A method of a user equipment (UE), comprising: decoding a first stage downlink control information (DCI) of two-stage DCI received from a base station that schedules a transmission on a physical uplink shared channel (PUSCH); determining, based on a reserved value for a field of the first stage DCI, to use a plurality of precoding matrices indicated by a plurality of subband transmission precoder matrix indicators (TPMIs) of a second stage DCI of the two-stage DCI to precode the transmission, wherein the reserved value comprises a value of a demodulation reference signal (DMRS) antenna port indication of the first stage DCI; decoding the second stage DCI of the two-stage DCI having the plurality subband TPMIs; precoding the transmission using the plurality of precoding matrices indicated by the plurality of subband TPMIs; and sending the transmission on the PUSCH.