In NR, studies are underway to control reception processing (e.g., at least one of reception, demapping, demodulation, and decoding) and transmission processing (e.g., at least one of transmission, mapping, precoding, modulation, and coding) in UE of at least one of a signal and a channel (expressed as a signal/channel) based on a transmission configuration indication state (TCI state).

The TCI state may represent what is applied to a downlink signal/channel. One corresponding to the TCI state applied to an uplink signal/channel may be expressed as a spatial relation.

The TCI state is information about a quasi-co-location (QCL) of the signal/channel, and may also be referred to as, for example, a spatial Rx parameter, spatial relation information (SRI), or the like. The TCI state may be configured in UE for each channel or each signal.

The QCL is an indicator indicating a statistical property of a signal/channel. For example, a case where one signal/channel and another signal/channel have a QCL relation may mean that it is possible to assume that at least one of Doppler shift, Doppler spread, an average delay, a delay spread, or a spatial parameter (e.g., a spatial Rx parameter) is identical (in QCL with respect to at least one of these) between the plurality of different signals/channels.

Note that the spatial Rx parameter may correspond to a reception beam of the UE (e.g., a reception analog beam), and the beam may be identified based on spatial QCL. The QCL (or at least one element of the QCL) in the present disclosure may be replaced with the spatial QCL (sQCL).

A plurality of types of QCL (QCL types) may be defined. For example, four QCL types A to D with different parameters (or parameter sets) that can be assumed to be identical may be provided. These parameters are as follows: