A method comprising: obtaining channel state information, CSI, feedback for multiple downlink component carriers, CCs, by a user equipment, UE, in a multi-carrier wireless communication network of a LTE system, wherein each downlink CC is associated with a feedback mode, and wherein each feedback mode comprises a set of feedback types to be reported to a base station at time slots configured by an upper layer, the method further comprising: determining a prioritized downlink CC for CSI reporting based on feedback types to be transmitted for each downlink CC at a given time slot, wherein different feedback types are organized into feedback type groups based on CSI information types including precoding type indicator, rank indication, channel quality indicator, precoder matrix indicator, and wherein multiple feedback types within the same feedback type group share the same priority level, wherein, if the different feedback types have the same priority level, the prioritized downlink CC is further determined based on the feedback modes at the given time slot, wherein different feedback modes are organized into feedback mode groups, and wherein multiple feedback modes within the same feedback mode group share the same priority level, and wherein, if the different feedback types and feedback modes have the same priority level, the prioritized downlink CC is further determined based on an upper layer configuration; and transmitting corresponding CSI feedback for the prioritized downlink CC over a primary uplink CC. obtaining channel state information, CSI, feedback for multiple downlink component carriers, CCs, by a user equipment, UE, in a multi-carrier wireless communication network of a LTE system, wherein each downlink CC is associated with a feedback mode, and wherein each feedback mode comprises a set of feedback types to be reported to a base station at time slots configured by an upper layer, the method further comprising: determining a prioritized downlink CC for CSI reporting based on feedback types to be transmitted for each downlink CC at a given time slot, wherein different feedback types are organized into feedback type groups based on CSI information types including precoding type indicator, rank indication, channel quality indicator, precoder matrix indicator, and wherein multiple feedback types within the same feedback type group share the same priority level, determining a prioritized downlink CC for CSI reporting based on feedback types to be transmitted for each downlink CC at a given time slot, wherein different feedback types are organized into feedback type groups based on CSI information types including precoding type indicator, rank indication, channel quality indicator, precoder matrix indicator, and wherein multiple feedback types within the same feedback type group share the same priority level, wherein, if the different feedback types have the same priority level, the prioritized downlink CC is further determined based on the feedback modes at the given time slot, wherein different feedback modes are organized into feedback mode groups, and wherein multiple feedback modes within the same feedback mode group share the same priority level, and wherein, if the different feedback types and feedback modes have the same priority level, the prioritized downlink CC is further determined based on an upper layer configuration; and transmitting corresponding CSI feedback for the prioritized downlink CC over a primary uplink CC.