Patent ID: 8923273

Claim:
A method of transmitting a reception acknowledgement in a wireless communication system, comprising: determining, by a user equipment (UE), a number of ACK/NACK bits for a plurality of serving cells and at least one downlink subframe for which the UE needs to feedback ACK/NACK in each of the plurality of serving cells; generating, by the UE, combined ACK/NACK bits by arranging the ACK/NACK bits in ascending order of cell indexes of the plurality of serving cells; generating, by the UE, encoded ACK/NACK bits by encoding the combined ACK/NACK bits; generating, by the UE, ACK/NACK symbols by modulating the encoded ACK/NACK bits; and transmitting, by the UE, the ACK/NACK symbols to a base station.