1. A method for transmitting and receiving data during a transmission opportunity (TxOP) period in a wireless access system supporting carrier aggregation (CA) with an unlicensed band, the method performed by a user equipment (UE) and comprising:receiving a higher layer signal on a primary cell (Pcell), the higher layer signal including configuration information which indicates a size and a use of the TxOP period;
receiving a scheduling grant including scheduling information on the TxOP period at a first subframe of the TxOP period; and
transmitting and receiving data in accordance with the use of the TxOP period on the basis of the scheduling information in a secondary cell (Scell) during the TxOP period,
wherein the size of the TxOP period is defined by a number of subframes of the Scell and the use of the TxOP period is set for downlink data transmission or uplink data transmission, wherein whether the subframes of the Scell are included in the TxOP period is determined in accordance with a transmission direction of subframes of the Pcell corresponding to the subframes of the Scell, 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.