US 12,232,137 B2
User equipments, base stations and methods for configurable downlink control information for demodulation reference signal for a physical uplink shared channel
Tatsushi Aiba, Sakai (JP); Kai Ying, Vancouver, WA (US); and Kazunari Yokomakura, Sakai (JP)
Assigned to SHARP KABUSHIKI KAISHA, Sakai (JP)
Appl. No. 17/772,684
Filed by SHARP KABUSHIKI KAISHA, Sakai (JP)
PCT Filed Sep. 25, 2020, PCT No. PCT/JP2020/036441
§ 371(c)(1), (2) Date Apr. 28, 2022,
PCT Pub. No. WO2021/090604, PCT Pub. Date May 14, 2021.
Claims priority of provisional application 62/931,973, filed on Nov. 7, 2019.
Prior Publication US 2023/0007680 A1, Jan. 5, 2023
Int. Cl. H04W 72/12 (2023.01); H04L 5/00 (2006.01); H04W 72/23 (2023.01)
CPC H04W 72/23 (2023.01) [H04L 5/0051 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A user equipment (UE) comprising:
receiving circuitry configured to receive a radio resource control (RRC) message comprising information used for indicating which one of 0, 4, 5, and 6 is a number of bits for an antenna port field in a downlink control information (DCI) format, the DCI format being used for scheduling of a physical downlink shared channel (PDSCH); and
processing circuitry configured to determine, based on the information, whether or not the antenna port field is present in the DCI format, wherein
the receiving circuitry is further configured to receive, based on a determination that the antenna port field is not present in the DCI format, a demodulation reference signal (DMRS) for the PDSCH using an antenna port associated with a DMRS port, the DMRS port being associated with an index value 0 in a corresponding table.