US 12,426,077 B2
Systems and methods for determining and indicating antenna ports with configurable antenna port field in DCI
Shiwei Gao, Nepean (CA); Yufei Blankenship, Kildeer, IL (US); Sebastian Faxér, Stockholm (SE); Mattias Frenne, Uppsala (SE); and Siva Muruganathan, Stittsville (CA)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 17/765,859
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Oct. 5, 2020, PCT No. PCT/IB2020/059308
§ 371(c)(1), (2) Date Apr. 1, 2022,
PCT Pub. No. WO2021/064705, PCT Pub. Date Apr. 8, 2021.
Claims priority of provisional application 62/910,724, filed on Oct. 4, 2019.
Prior Publication US 2022/0330254 A1, Oct. 13, 2022
Int. Cl. H04W 72/563 (2023.01); H04L 5/00 (2006.01); H04W 72/0453 (2023.01); H04W 72/23 (2023.01)
CPC H04W 72/563 (2023.01) [H04L 5/0051 (2013.01); H04W 72/0453 (2013.01); H04W 72/23 (2023.01)] 25 Claims
OG exemplary drawing
 
1. A method performed by a wireless communication device for a cellular communications system, the method comprising:
receiving a configuration from a network node, the configuration comprising a demodulation reference signal, DMRS, configuration that comprises an indication of a type of DMRS used and a maximum number of front-loaded DMRS symbols, and an antenna port field configuration indicating a size of an antenna port field having a configurable size in a downlink control information, DCI, format;
receiving a DCI of the DCI format from the network node for a corresponding physical channel, the received DCI comprising an antenna port field;
determining the size of the antenna port field of the received DCI;
determining a DMRS port table for interpreting a value comprised in the antenna port field of the received DCI based on at least the DMRS configuration and the size of the antenna port field, the determined DMRS port table being a subset of a master DMRS port table; and
determining one or more DMRS ports in the DMRS table used for the corresponding physical channel based on the value of the antenna port field that corresponds to an entry in the identified DMRS table.