Method for transmitting and receiving signal on basis of dynamic change in wireless resource in wireless communication system to which carrier aggregation scheme is applied, and device therefore

A user equipment (UE) in a Time Division Duplex (TDD) communication system, the user equipment comprising:

• a radio frequency module for transmitting and receiving signals with a base station;
• and
• a processor for processing the signals,
• wherein the processor is configured to:
• set subframe configuration according to a first subframe configuration defining subframe usages for each of subframes included in one radio frame,
• communicate with a base station based on the first subframe configuration,
• wherein a first subframe included in one radio frame is set as an uplink subframe based on the first subframe configuration, and
• wherein a sounding reference signal (SRS) is allocated in the first subframe based on the first subframe configuration,
• re-set the subframe configuration from the first subframe configuration to a second subframe configuration, and
• communicate with the base station based on the re-set second subframe configuration,
• wherein the first subframe included in one radio frame is changed to a downlink subframe from the uplink subframe based on the re-configured second subframe configuration, and
• wherein the allocated SRS in the first subframe is dropped and physical downlink shared channel (PDSCH) is allocated in a position corresponding to the dropped SRS in the first subframe when the first subframe is changed to the downlink subframe from the uplink subframe.