A component carrier (CC) selection based aperiodic CSI report trigger configuration may be used to trigger one or more of channel state information (CSI) processes, CCs in cell groups, and/or CSI subframe sets to perform an aperiodic CSI report based on a value of a CSI request field in an uplink DCI format and serving cell information to indicate a serving cell where aperiodic CSI reporting is transmitted according to the detected uplink DCI format or a serving cell where PDCCH conveying the detected uplink DCI format is transmitted.