Method and device for reporting channel state information

A device for reporting channel state information (CSI) in a wireless communication system, the device comprising:

• a processor;
• and
• a memory operatively coupled with the processor and configured to store instructions that, when executed by the processor, cause the device to perform functions comprising:
• receiving a first uplink grant for indicating that a transmission of a physical uplink shared channel (PUSCH) is triggered by a second uplink grant in a first subframe on a Licensed-Assisted Access (LAA) cell, the first uplink grant further requesting a report of an aperiodic CSI, the first uplink grant including a first timing offset;
• receiving the second uplink grant for triggering the transmission of the PUSCH in a second subframe on the LAA cell, the second uplink grant including a second timing offset;
• determining a third subframe in which the PUSCH is to be transmitted based on the first timing offset and the second timing offset;
• computing the aperiodic CSI based on a valid subframe no later than the first subframe in which the first uplink grant is received;
• and
• transmitting the PUSCH in the third subframe on the LAA cell, the PUSCH including the computed aperiodic CSI.