A terminal apparatus configured with a first cell group and a second cell group includes a detector configured to detect a radio link failure of the first cell group, and a controller configured to initiate a first procedure for reporting the radio link failure of the first cell group. The first procedure is initiated based on transmission in the first cell group and the second cell group not being suspended, the second cell group not being in a first state, and the radio link failure of the first cell group being detected. The first state is a state in which a first BWP is activated in an SpCell of a corresponding cell group, a PDCCH is not monitored in the first BWP, and measurement of channel state information (CSI) for the first BWP is performed.