• • QCL type A: Doppler shift, Doppler spread, average delay, and delay spread;
  • QCL Type B: Doppler shift and Doppler spread;
  • QCL type C: Doppler shift and average delay; and
  • QCL type D: spatial Rx parameter.

Note that it may be referred to as a QCL assumption for UE to assume that a given control resource set (CORESET), channel, or reference signal has a specific QCL (e.g., QCL type D) relation with another CORESET, channel, or reference signal.

The TCI state may be information (e.g., a DL-RS, a QCL type, a cell in which a DL-RS is transmitted, or the like) about a reception beam (spatial domain reception filter) indicated (configured) for the UE. The QCL assumption is based on transmission or reception of an associated signal (e.g., PRACH), and may be information (e.g., a DL-RS, a QCL type, a cell in which a DL-RS is transmitted, or the like) about a reception beam (spatial domain reception filter) assumed by the UE.

The UE may determine at least one of a Tx beam (Tx beam) and a reception beam (Rx beam) of a signal/channel based on a TCI state of the signal/channel or the QCL assumption.

The TCI state may be, for example, information about QCL of a target channel (or a reference signal (RS) for the channel) and another signal (e.g., another downlink reference signal (DL-RS). The TCI state may be configured (indicated) by higher layer signaling, physical layer signaling, or a combination thereof.