US 12,309,780 B2
Avoiding collisions with reference signals
Hamed Pezeshki, San Diego, CA (US); Tao Luo, San Diego, CA (US); Arumugam Chendamarai Kannan, San Diego, CA (US); and Yan Zhou, San Diego, CA (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Mar. 10, 2023, as Appl. No. 18/182,267.
Application 18/182,267 is a continuation of application No. 16/949,247, filed on Oct. 21, 2020, granted, now 11,617,163.
Claims priority of provisional application 62/925,209, filed on Oct. 23, 2019.
Prior Publication US 2023/0337236 A1, Oct. 19, 2023
Int. Cl. H04L 5/00 (2006.01); H04W 72/20 (2023.01)
CPC H04W 72/20 (2023.01) [H04L 5/0048 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A method of wireless communication performed by a user equipment (UE), comprising:
receiving control information that schedules a first demodulation reference signal (DMRS) associated with a downlink data transmission so as to avoid a collision with a cell-specific reference signal (CRS) in one or more first resource elements;
determining, based at least in part on the control information, a potential collision, in the one or more first resource elements, between the CRS and a second DMRS associated with a semi-persistent scheduling (SPS) of a data transmission;
determining that the second DMRS is to be shifted to a position associated with one or more second resource elements based at least in part on the potential collision, wherein the downlink data transmission is associated with a first CRS pattern of a first cell, and the SPS of the data transmission is associated with a second CRS pattern of a second cell; and
receiving the second DMRS in the one or more second resource elements.