User terminal, radio base station, radio communication method, and radio communication system
Abstract:
A user terminal that communicates with a plurality of cell groups (CG), each group being formed with one or more cells to use different frequency bands, and a control section that selects at least one cell, from the cells where uplink control signals can be allocated, which are configured in each CG, and controls the cell to transmit the uplink control signals. When information to indicate cross-carrier scheduling (CCS) is included in a downlink control signal, the control section decides whether or not the cell having received the downlink control signal and the cell that is designated by the information to indicate CCS belong to the same CG, and selects the cell based on this decision. Thus, the decrease of overall system performance can be reduced even when CCS and uplink control signal transmission in secondary cells are employed at the same time.
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