Method by which terminal transmits data in unlicensed band, and apparatus using method
A method by which a terminal transmits data in an unlicensed band, and an apparatus using the method are provided. The method comprises: transmitting data to a base station through a physical uplink shared channel (PUSCH) in the unlicensed band; and receiving, from the base station, acknowledgement/negative acknowledgement (ACK/NACK) information about the data in the unlicensed band, wherein the terminal receives, from the base station, timeline information notifying of a time relationship between the PUSCH transmission time point and the ACK/NACK information reception time point.
1. A method for performing a hybrid automatic repeat request (HARQ) by a user equipment (UE), the method comprising:
receiving, from a base station, a higher layer signal informing of resources which can be used for transmitting a physical uplink shared channel (PUSCH);
transmitting, to the base station, the PUSCH through a first resource among the resources without receiving an uplink grant for the PUSCH; and
receiving, from the base station, downlink feedback information (DFI) including HARQ-ACK (acknowledgement) information for the PUSCH through a second resource,
wherein the UE receives information for a time duration between the first resource and the second resource from the base station, and
wherein the HARQ-ACK information is valid in a case that the first resource is located before the time duration based on the second resource.
2. The method of claim 1 , wherein the PUSCH transmission and the DFI reception are performed in an unlicensed band.
3. The method of claim 1 , wherein the time duration is given in symbol units.
4. The method of claim 1 , wherein the case that the first resource is located before the time duration based on the second resource is satisfied when a timing of the second resource is after a timing of the first resource by at least the time duration.
5. A user equipment (UE), the UE comprising:
a transceiver; and
a processor, operably coupled to the transceiver,
wherein the processor is configured to:
receive, from a base station, a higher layer signal informing of resources which can be used for transmitting a physical uplink shared channel (PUSCH),
transmit, to the base station, the PUSCH through a first resource among the resources without receiving an uplink grant for the PUSCH, and
receive, from the base station, downlink feedback information (DFI) including HARQ-ACK (acknowledgement) information for the PUSCH through a second resource,
wherein the UE receives information for a time duration between the first resource and the second resource from the base station, and
wherein the HARQ-ACK information is valid in a case that the first resource is located before the time duration based on the second resource.
6. The UE of claim 5 , wherein the PUSCH transmission and the DFI reception are performed in an unlicensed band.
7. The UE of claim 5 , wherein the time duration is given in symbol units.
8. The UE of claim 5 , wherein the case that the first resource is located before the time duration based on the second resource is satisfied when a timing of the second resource is after a timing of the first resource by at least the time duration.
9. A processor for a wireless communication device in a wireless communication system,
wherein the processor is configured to control the wireless communication device to:
receive, from a base station, a higher layer signal informing of resources which can be used for transmitting a physical uplink shared channel (PUSCH),
transmit, to the base station, the PUSCH through a first resource among the resources without receiving an uplink grant for the PUSCH, and
receive, from the base station, downlink feedback information (DFI) including HARQ-ACK (acknowledgement) information for the PUSCH through a second resource,
wherein the processor receives information for a time duration between the first resource and the second resource from the base station, and
wherein the HARQ-ACK information is valid in a case that the first resource is located before the time duration based on the second resource.
10. The processor of claim 9 , wherein the case that the first resource is located before the time duration based on the second resource is satisfied when a timing of the second resource is after a timing of the first resource by at least the time duration.