Methods and apparatuses for determining quasi co-location (QCL) assumptions for beam operations

A user equipment (UE) for performing beam operations, the UE comprising:

• one or more non-transitory computer-readable media having computer-executable instructions embodied thereon;
• and
• at least one processor coupled to the one or more non-transitory computer-readable media, and configured to execute the computer-executable instructions to:
• monitor at least one of a plurality of Control Resource Sets (CORESETs) configured for the UE within an active Bandwidth Part (BWP) of a serving cell in a time slot;
• receive Downlink Control Information (DCI) scheduling a Downlink (DL) Reference Signal (RS), wherein a scheduling offset between an end of a last symbol of a Physical Downlink Control Channel (PDCCH) carrying the DCI and a beginning of a first symbol of a resource carrying the DL RS is less than a threshold;
• and
• apply a first Quasi Co-Location (QCL) assumption of a first CORESET of a set of one or more of the monitored at least one of a plurality of CORESETs to receive a DL RS,
• wherein the first CORESET is associated with a monitored search space configured with a lowest CORESET Identity (ID) among the set of one or more of the monitored at least one of the plurality of CORESETs.