Method for reporting channel state information on transmission opportunity duration in wireless access system supporting unlicensed band, and device supporting same

A user equipment (UE) for reporting channel state information (CSI) on a transmission opportunity (TxOP) duration in a wireless access system supporting carrier aggregation (CA) with an unlicensed band, the UE comprising:

• a transmitter;
• a receiver;
• and
• a processor for controlling the transmitter and the receiver to report the CSI on the TxOP duration,
• wherein the processor is configured to:
• receive CSI interference measurement (CSI-IM) configuration information related to the TxOP duration through a primary cell (Pcell) by controlling the receiver,
• measure interference at subframes of a secondary cell (Scell), at which CSI-IM is configured, on the basis of the CSI-IM configuration information,
• measure CSI of the TxOP duration of the Scell by using the interference, and
• transmit the CSI to an enhanced Node-B (eNB) by controlling the transmitter, and
• wherein the Pcell is a serving cell configured in a licensed band, and the Scell is a serving cell configured in the unlicensed band, and
• wherein a period for configuring the CSI-IM is configured to be smaller than a size of the TxOP duration, and the CSI-IM configuration information includes period information of the CSI-IM, size information of the TxOP duration, and an offset value for indicating a subframe at which the CSI-IM is configured.