FIELD: radio engineering and communications.
SUBSTANCE: invention relates to a field of mobile communication technology. ACK/NACK feedback method in wireless communication system includes determining, by a UE, number of public sub-frames, all of which are uplink sub-frame in PCC and any SCC sub-frames of any radio frame in frame structure configurations according to the frame structure configurations of the PCC and any SCC; selecting, by the UE, a configuration, uplink sub-frames of which merely include sub-frames corresponding to the determined number of public sub-frames from existing seven kinds of frame structure configurations; and feeding back, by the UE, to a eNB ACK/NACK information corresponding to PDSCH in the SCC on the PCC adopting a timing relationship between the PDSCH and the ACK/NACK corresponding to the selected configuration.
EFFECT: technical result is effective support of carrier aggregation between bands of different frame structure configurations and implementation of the coexistence and performance optimization of different communication systems without limiting the number of amplifiers of the UE.
8 cl, 9 dwg, 1 tbl
