US 12,457,072 B2
Quasi-co-located assumption for aperiodic CSI-RS for multi-TRP operation
Yushu Zhang, Beijing (CN); Haitong Sun, Cupertino, CA (US); Weidong Yang, San Diego, CA (US); Wei Zeng, San Diego, CA (US); Haijing Hu, Beijing (CN); Dawei Zhang, Saratoga, CA (US); Yuchul Kim, Santa Clara, CA (US); Hong He, Cupertino, CA (US); Oghenekome Oteri, San Diego, CA (US); Chunhai Yao, Beijing (CN); Chunxuan Ye, San Diego, CA (US); Fangli Xu, Beijing (CN); Yuqin Chen, Shenzhen (CN); Zhibin Wu, Los Altos, CA (US); and Shu Guo, Beijing (CN)
Assigned to Apple Inc., Cupertino, CA (US)
Appl. No. 17/912,446
Filed by Apple Inc., Cupertino, CA (US)
PCT Filed Apr. 8, 2020, PCT No. PCT/CN2020/083673
§ 371(c)(1), (2) Date Sep. 16, 2022,
PCT Pub. No. WO2021/203272, PCT Pub. Date Oct. 14, 2021.
Prior Publication US 2023/0155773 A1, May 18, 2023
Int. Cl. H04L 5/00 (2006.01); H04W 72/232 (2023.01)
CPC H04L 5/0051 (2013.01) [H04L 5/0035 (2013.01); H04L 5/0053 (2013.01); H04W 72/232 (2023.01)] 13 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
a processor configured to cause a wireless device to:
receive downlink control information (DCI);
determine a first quasi-co-located (QCL) assumption for aperiodic channel state information reference signals (CSI-RS) for the DCI;
buffer received signals according to the first QCL assumption for aperiodic CSI-RS if a scheduling offset for the DCI is below a scheduling offset threshold,
wherein the first QCL assumption for aperiodic CSI-RS includes a transmission configuration indicator (TCI) state activated by media access control (MAC) control element (CE) if at least one TCI is activated by MAC CE,
determine that there is no TCI state activated by MAC CE for the aperiodic CSI-RS and other resources; and
in response to the determination that there is no TCI state activated by MAC CE for the aperiodic CSI-RS and other resources, determine the first QCL assumption for aperiodic CSI-RS based on a QCL assumption for a control resource set in a latest slot with a lowest identifier.