US 12,244,380 B2
Transmission mode-based indications of preferred configurations of demodulation reference signals
Michael Levitsky, Rehovot (IL); Muhammad Sayed Khairy Abdelghaffar, San Jose, CA (US); and Daniel Paz, Geva Carmel (IL)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Sep. 24, 2021, as Appl. No. 17/448,852.
Prior Publication US 2023/0096382 A1, Mar. 30, 2023
Int. Cl. H04B 7/06 (2006.01); H04B 7/01 (2006.01); H04B 17/336 (2015.01); H04L 5/00 (2006.01); H04W 24/00 (2009.01)
CPC H04B 7/0626 (2013.01) [H04B 7/01 (2013.01); H04B 17/336 (2015.01); H04L 5/0051 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A method of wireless communication performed by a user equipment (UE), comprising:
receiving, from a network entity associated with multiple transmission reception points (TRPs), one or more reference signals associated with a downlink communication; and
transmitting an indication of a preferred demodulation reference signal (DMRS) configuration and an additional DMRS configuration to be used for the downlink communication, the preferred DMRS configuration and the additional DMRS configuration based at least in part on the one or more reference signals,
wherein the preferred DMRS configuration is based at least in part on a speed of the UE and a first candidate transmission mode from a set of multiple candidate transmission modes, the first candidate transmission mode associated with the preferred DMRS configuration,
wherein the additional DMRS configuration is based at least in part on a second candidate transmission mode, from the set of multiple candidate transmission modes, that is associated with the additional DMRS configuration, and
wherein the indication of the preferred DMRS configuration and the additional DMRS configuration to be used for the downlink communication is based at least in part on one or more of:
a Doppler spread or a time correlation characteristic, per TRP of the multiple TRPs, associated with the one or more reference signals,
a signal-to-noise ratio or a signal-to-interference-plus-noise ratio, per TRP of the multiple TRPs, associated with the one or more reference signals, or
an indication associated with Doppler spread or time correlation characteristic for DMRS ports for an associated multi-TRP transmission mode evaluated based at least in part on a transmission mode assumption and based at least in part on Doppler characteristics or time correlation measurements per TRP.