A method and apparatus for re-adjusting the set size for the associated downlink component carriers having different sub-division duplex frame configuration of (DL)

It provides a method, apparatus and computer program product for resizing the associated collection for downlink (DL) component carriers having different sub-division duplex frame configuration of. There is provided a method comprising determining the set of associated DL included in the DL subframe for each component carrier of the plurality of component carriers. Which comprises the corresponding acknowledgment (the ACK) in the associated sub-set of the DL DL component carriers for the respective frames / number of denied (NACK) bits differ by at least a predetermined number of instances in which modification corresponding to the DL the number of ACK / NACK bits of the sub-frame, the DL subframe includes a set of associated DL for the respective components for each component carrier in the carrier. The method may further cause the component carrier via a respective, associated, according to the modified set of DL transmission ACK / NACK bits. Also it provides a corresponding apparatus and computer program product.