US 11,968,136 B2
Demodulation reference signal (DMRS) transmission for sidelink communications
Shuanshuan Wu, San Diego, CA (US); Gabi Sarkis, San Diego, CA (US); Kapil Gulati, Belle Mead, NJ (US); Sudhir Kumar Baghel, Hillsborough, NJ (US); Junyi Li, Chester, NJ (US); and Arthur Gubeskys, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Oct. 2, 2020, as Appl. No. 17/061,932.
Claims priority of provisional application 62/910,894, filed on Oct. 4, 2019.
Prior Publication US 2021/0105118 A1, Apr. 8, 2021
Int. Cl. H04L 5/00 (2006.01); H04W 72/20 (2023.01); H04W 72/0446 (2023.01); H04W 72/0453 (2023.01); H04W 92/18 (2009.01)
CPC H04L 5/0048 (2013.01) [H04L 5/001 (2013.01); H04W 72/20 (2023.01); H04W 72/0446 (2013.01); H04W 72/0453 (2013.01); H04W 92/18 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A method of wireless communication performed by a transmitter user equipment (UE), comprising:
determining a first demodulation reference signal (DMRS) pattern from a first set of DMRS patterns for a first slot allocated for transmission over a sidelink between the transmitter UE and a receiver UE, wherein the first slot corresponds to a first slot format, and wherein the first set of DMRS patterns is associated with the first slot format based on
(i) presence or absence of orthogonal frequency-division multiplexing (OFDM) symbols for sidelink feedback specified by the first slot format, and
(ii) a subcarrier spacing (SCS), a frequency range, or both, of the sidelink;
transmitting, to the receiver UE, an index value indicating the one of the first set of DMRS patterns that is the first DMRS pattern; and
transmitting, to the receiver UE, DMRS in the first slot according to the first DMRS pattern,
wherein, in a case that the first set of DMRS patterns includes two different DMRS patterns, the index value is one of two different values that respectively represent the two different DMRS patterns included in the first set of DMRS patterns, and
wherein, in a case that the first set of DMRS patterns includes three different DMRS patterns, the index value is one of three different values that respectively represent the three different DMRS patterns included in the first set of DMRS patterns.