the receiver 1301 is configured to: receive at least one physical downlink control channel according to the information that is about the first resource set group and stored by the memory 1300, acquire first control information carried on the at least one physical downlink control channel, and receive downlink data according to scheduling information that is of the downlink data and included in the first control information, where the at least one physical downlink control channel is a physical downlink control channel in at least one subset of the physical downlink control channel set; and
the processor 1302 is configured to detect, in the second resource set group corresponding to the information that is about the second resource set group and stored by the memory 1300, the physical downlink control channel for retransmission corresponding to the downlink data.
Further, the processor 1302 is further configured to: before detecting, in the second resource set group, the physical downlink control channel for retransmission corresponding to the downlink data, determine, according to the correspondence stored by the memory 1300 and the at least one physical downlink control channel received by the receiver 1301, the second resource set group corresponding to retransmission of the downlink data.
Further, the processor 1302 is further configured to determine, according to an indication in the at least one physical downlink control channel received by the receiver 1301, the second resource set group corresponding to retransmission of the downlink data.