Method for receiving downlink signal, in wireless communication system supporting unlicensed band, and device for supporting same
Disclosed are a method for transmitting a downlink signal by a terminal from a base station, in a licensed assisted access (LAA) system for execution of listen-before-talk (LBT) based signal transmission by a base station or a terminal, and a device for supporting same. More particularly, even if the terminal does not receive from the base station information which indicates that from N−1th subframe to Nth subframe is a partial subframe (a subframe configuration in which a downlink signal is transmitted only on some of the symbols of a subframe), the terminal receives a physical downlink control channel (PDCCH) comprising uplink scheduling information.
1. A method of receiving a downlink signal by a user equipment (UE) from a base station in a wireless communication system supporting an unlicensed band, the method comprising:
performing, by the UE, a reception of a first physical downlink control channel (PDCCH) comprising uplink scheduling information, in a subframe#n of the unlicensed band, based on determination that (i) information indicating that a number of occupied symbols for the subframe#n of the unlicensed band is less than 14 is not received in a subframe#n−1 of the unlicensed band and (ii) the UE identifies that the occupied symbols for the subframe#n is less than 14 during the subframe#n, where n is an integer larger than 1.
2. The method of claim 1 , wherein the first PDCCH is received via a UE-specific search space.
3. The method of claim 1 , wherein the information is included in a common PDCCH received via a common search space.
4. A user equipment (UE) receiving a downlink signal in a wireless communication system supporting an unlicensed band, the user equipment comprising:
a receiver; and
a processor configured to operate in a manner of being connected with the receiver,
wherein the processor controls the receiver to receive a first physical downlink control channel (PDCCH) comprising uplink scheduling information, in a subframe#n of the unlicensed band, based on determination that (i) information indicating that a number of occupied symbols for the subframe#n of the unlicensed band is less than 14 is not received in a subframe#n−1 of the unlicensed band and (ii) the UE identifies that the occupied symbols for the subframe#n is less than 14 during the subframe#n, where n is an integer larger than 1.
5. The UE of claim 4 , wherein the first PDCCH is received via a UE-specific search space.
6. The UE of claim 4 , wherein the information is included in a common PDCCH received via a common search space.
7. The method of claim 1 , wherein the UE identifies that the occupied symbols for the subframe#n is less than 14 during the subframe#n, based on a second PDCCH received via a common search space in the subframe#n of the unlicensed band.
8. The method of claim 1 , wherein the subframe#n corresponds to an ending partial subframe that at least one last symbol is not occupied.
9. The UE of claim 4 , wherein the UE identifies that the occupied symbols for the subframe#n is less than 14 during the subframe#n, based on a second PDCCH received via a common search space in the subframe#n of the unlicensed band.
10. The UE of claim 4 , wherein the subframe#n corresponds to an ending partial subframe that at least one last symbol is not occupied.