An apparatus for a terminal in a wireless communication system, the apparatus comprising: a transceiver configured to: transmit, to a base station, through a first carrier a message comprising information notifying that the terminal supports time division duplex, TDD,- frequency division duplex, FDD, carrier aggregation, CA, using the first carrier based on the FDD and a second carrier based on the TDD, wherein the message further comprises information on a supportable combination of frequency bands including a first band among frequency bands used for FDD and a second band among frequency bands used for TDD, and in response to the TDD-FDD CA being supported by the terminal, receive, from the base station, through the first carrier frame configuration information for the second carrier wherein the frame configuration information comprises information for configuration of subframes for an uplink or a downlink for the second carrier; and at least one processor configured to identify at least one uplink subframe for the second carrier based on the frame configuration information and to perform the TDD-FDD CA to communicate with the base station based on the frame configuration information without estimating downlink information for the at least one uplink subframe identified based on the frame configuration information, wherein the first carrier is used to perform downlink communications and uplink communications based on the FDD, wherein the second carrier is used to perform only downlink communications according to the frame configuration information, and wherein the downlink data received via the second carrier is received through a downlink subframe identified by the frame configuration information. a transceiver configured to: transmit, to a base station, through a first carrier a message comprising information notifying that the terminal supports time division duplex, TDD,- frequency division duplex, FDD, carrier aggregation, CA, using the first carrier based on the FDD and a second carrier based on the TDD, wherein the message further comprises information on a supportable combination of frequency bands including a first band among frequency bands used for FDD and a second band among frequency bands used for TDD, and in response to the TDD-FDD CA being supported by the terminal, receive, from the base station, through the first carrier frame configuration information for the second carrier wherein the frame configuration information comprises information for configuration of subframes for an uplink or a downlink for the second carrier; and at least one processor configured to identify at least one uplink subframe for the second carrier based on the frame configuration information and to perform the TDD-FDD CA to communicate with the base station based on the frame configuration information without estimating downlink information for the at least one uplink subframe identified based on the frame configuration information, transmit, to a base station, through a first carrier a message comprising information notifying that the terminal supports time division duplex, TDD,- frequency division duplex, FDD, carrier aggregation, CA, using the first carrier based on the FDD and a second carrier based on the TDD, wherein the message further comprises information on a supportable combination of frequency bands including a first band among frequency bands used for FDD and a second band among frequency bands used for TDD, and in response to the TDD-FDD CA being supported by the terminal, receive, from the base station, through the first carrier frame configuration information for the second carrier wherein the frame configuration information comprises information for configuration of subframes for an uplink or a downlink for the second carrier; and at least one processor configured to identify at least one uplink subframe for the second carrier based on the frame configuration information and to perform the TDD-FDD CA to communicate with the base station based on the frame configuration information without estimating downlink information for the at least one uplink subframe identified based on the frame configuration information, wherein the first carrier is used to perform downlink communications and uplink communications based on the FDD, wherein the second carrier is used to perform only downlink communications according to the frame configuration information, and wherein the downlink data received via the second carrier is received through a downlink subframe identified by the frame configuration information.