US 12,035,327 B2
System and method for DMRS antenna port indication for URLLC
Avik Sengupta, Cupertino, CA (US); Debdeep Chatterjee, Cupertino, CA (US); and Fatemeh Hamidi-Sepehr, Cupertino, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Appl. No. 17/441,831
Filed by Apple Inc., Cupertino, CA (US)
PCT Filed May 1, 2020, PCT No. PCT/US2020/031091
§ 371(c)(1), (2) Date Sep. 22, 2021,
PCT Pub. No. WO2020/227122, PCT Pub. Date Nov. 12, 2020.
Claims priority of provisional application 62/843,273, filed on May 3, 2019.
Prior Publication US 2022/0338229 A1, Oct. 20, 2022
Int. Cl. H04W 72/23 (2023.01); H04L 5/00 (2006.01)
CPC H04W 72/23 (2023.01) [H04L 5/0051 (2013.01); H04L 5/0094 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method comprising:
receiving configuration information that indicates a bit-width value for an antenna port indication field of a downlink control information (DCI) format;
determining the bit-width value for the antenna port indication field of a DCI format based at least on the configuration information;
receiving a DCI message that is in accordance with the DCI format;
determining, based at least on the bit-width value, whether the bit-width value is equal to zero and to determine a default value for an antenna port configuration instead of determining a value for an antenna port configuration for one or more demodulation reference signals based on an antenna port indication field in the DCI message; and
communicating the one or more demodulation reference signals using the antenna port configuration based at least in part on a result of the determination whether the bit-width value is equal to zero and to determine the default value for the antenna port configuration instead of determining the value for the antenna port configuration for one or more demodulation reference signals based on the antenna port indication field in the DCI message.