A method for wireless communication using frequency division duplexing between a second user equipment and a base station in a wireless communication system that supports a first user equipment that uses a single frequency band and the second user equipment that uses a plurality of frequency bands for a carrier aggregation, the method comprising: receiving, by the second user equipment, from the base station, resource allocation information including information indicating links between a plurality of downlink component carriers and a plurality of uplink component carriers allocated to the second user equipment, wherein the plurality of downlink component carriers includes a plurality of prime-linked downlink component carriers and at least one remnant downlink carrier other than the plurality of prime-linked downlink component carriers, wherein each of the plurality of prime-linked downlink component carriers is prime-linked with one of the plurality of uplink component carriers to support the first user equipment, and wherein each of the at least one remnant downlink component carrier is sub-linked with one uplink component carrier which is prime-linked; receiving, by the second user equipment from the base station, downlink data signal including physical downlink shared channel, PDSCH, for a first remnant downlink component carrier of the at least one remnant downlink carrier through the first remnant downlink component carrier; and transmitting, by the second user equipment to the base station, uplink data signal including acknowledgement, ACK, or negative-ACK, NACK, for the PDSCH, wherein the plurality of downlink component carriers have respective cell identifications different from each other, and, wherein the ACK or NACK for the PDSCH is transmitted through a second uplink component carrier which is sub-linked with the first remnant downlink component carrier and a first cell identification applied to the uplink data signal is a cell identification of a second downlink component carrier which is prime-linked with the second uplink component carrier. receiving, by the second user equipment, from the base station, resource allocation information including information indicating links between a plurality of downlink component carriers and a plurality of uplink component carriers allocated to the second user equipment, wherein the plurality of downlink component carriers includes a plurality of prime-linked downlink component carriers and at least one remnant downlink carrier other than the plurality of prime-linked downlink component carriers, wherein each of the plurality of prime-linked downlink component carriers is prime-linked with one of the plurality of uplink component carriers to support the first user equipment, and wherein each of the at least one remnant downlink component carrier is sub-linked with one uplink component carrier which is prime-linked; receiving, by the second user equipment from the base station, downlink data signal including physical downlink shared channel, PDSCH, for a first remnant downlink component carrier of the at least one remnant downlink carrier through the first remnant downlink component carrier; and transmitting, by the second user equipment to the base station, uplink data signal including acknowledgement, ACK, or negative-ACK, NACK, for the PDSCH, wherein the plurality of downlink component carriers have respective cell identifications different from each other, and, wherein the ACK or NACK for the PDSCH is transmitted through a second uplink component carrier which is sub-linked with the first remnant downlink component carrier and a first cell identification applied to the uplink data signal is a cell identification of a second downlink component carrier which is prime-linked with the second uplink component carrier.