Terminal, base station, transmission method and reception method in a heterogeneous network regarding comp control of channel information

摘要

The present invention is a terminal capable of suppressing increase in transmit power required for transmitting a CSI report at a terminal while widely securing candidates for motion control. A reception processing unit (203) receives multiple reference signals from multiple transmission points, first information indicating the multiple transmission points, and second information indicating at least one transmission point included in the multiple transmission points; a CSI generation unit (206), on the basis of the first information, generates first channel information including channel information corresponding to each of the multiple reference signals from the multiple transmission points, and on the basis of the second information, generates second channel information including channel information corresponding to the reference signals from the at least one of the transmission points; and a transmission signal formation unit (208) transmits the first channel information and the second channel information which have been generated.

主权项

1. A terminal comprising:
a receiving section that receives a plurality of reference signals from a plurality of transmission points, first information indicating the plurality of transmission points and second information indicating at least one of some of the plurality of transmission points; a generating section that generates a first channel state information (CSI) part including CSI respectively corresponding to the plurality of reference signals from the plurality of transmission points indicated by the first information and that generates a second CSI part including CSI corresponding to the reference signals from the some transmission points indicated by the second information, the first CSI part being used for updating the second information, and the second CSI part being used for control of coordinated transmission; and a transmitting section that transmits the generated first CSI part and the generated second CSI part, wherein the receiving section receives the first information through a radio resource control (RRC) signaling, and receives the second information through MAC control element (MAC CE); the transmitting section transmits the first CSI part with lower frequency than a transmitting frequency of the second CSI part; and the generated first CSI part includes a third CSI part corresponding to the reference signal from a transmission point not included in the some transmission points and a forth CSI part corresponding to the reference signal from the some transmission points, the third CSI part including wideband channel quality indicator (CQI) and not including precoding matrix indicator (PMI) and Rank indicator (RI), the forth CSI part including narrowband CQI, PMI and RI, and an amount of the third CSI part is smaller than an amount of the fourth CSI part.