A method for transmitting an uplink control channel of a user equipment, UE, in a wireless communication system supporting reconfiguration of a radio resource, the method comprising: receiving, from a base station, BS, offset information on whether Acknowledgement/Negative-Acknowledgement, ACK/NACK, transmission timing is determined based on a first option or a second option, wherein in the first option, a first offset value is received via Radio Resource Control, RRC, signaling and in the second option, a second offset value is obtained based on a total sum of control channel elements, CCEs, for a downlink subframe and a special subframe, wherein the offset information is for configuring a second Physical Uplink Control Channel, PUCCH, resource region associated with a second type subframe and a third type subframe based on a first PUCCH resource region for a first type subframe; and transmitting, to the BS, ACK/NACK for at least one downlink subframe using the second PUCCH resource region, wherein the second PUCCH resource region is configured based on the offset information, wherein the first type subframe has the same Hybrid Automatic Retransmission Request, HARQ, timing for an enhanced interference management and traffic adaptation, eIMTA, UE and a non-eIMTA UE and has fixed configuration of the radio resource, wherein the second type subframe has different HARQ timing for the eIMTA UE and the non-eIMTA UE and has the fixed configuration of the radio resource, wherein the third type subframe has changeable configuration of the radio resource, and wherein the ACK/NACK transmission timing is determined based on the second offset value when the offset information is not received from the BS. receiving, from a base station, BS, offset information on whether Acknowledgement/Negative-Acknowledgement, ACK/NACK, transmission timing is determined based on a first option or a second option, wherein in the first option, a first offset value is received via Radio Resource Control, RRC, signaling and in the second option, a second offset value is obtained based on a total sum of control channel elements, CCEs, for a downlink subframe and a special subframe, wherein the offset information is for configuring a second Physical Uplink Control Channel, PUCCH, resource region associated with a second type subframe and a third type subframe based on a first PUCCH resource region for a first type subframe; and transmitting, to the BS, ACK/NACK for at least one downlink subframe using the second PUCCH resource region, wherein the second PUCCH resource region is configured based on the offset information, wherein the first type subframe has the same Hybrid Automatic Retransmission Request, HARQ, timing for an enhanced interference management and traffic adaptation, eIMTA, UE and a non-eIMTA UE and has fixed configuration of the radio resource, wherein the second type subframe has different HARQ timing for the eIMTA UE and the non-eIMTA UE and has the fixed configuration of the radio resource, wherein the third type subframe has changeable configuration of the radio resource, and wherein the ACK/NACK transmission timing is determined based on the second offset value when the offset information is not received from the BS. <EOS>