Method for supporting plurality of transmission time intervals, plurality of subcarrier intervals or plurality of processing times in wireless communication system, and device therefor
A method for transmitting an uplink signal for a terminal in a wireless communication system supporting aggregation between carriers configured with a plurality of transmission time intervals (TTI) or subcarrier intervals according to an embodiment of the present disclosure is carried out by the terminal and may comprise a step of receiving downlink data, or downlink control information including an uplink grant, and a step of transmitting an uplink signal corresponding to the downlink data or the uplink grant.
1. A method for transmitting Hybrid Automatic Repeat Request-Acknowledgment (HARQ-ACK) signal by a user equipment (UE) in a wireless communication system supporting a plurality of transmission time interval (TTI) lengths, the method comprising:
receiving downlink data; and
transmitting a HARQ-ACK signal related to the downlink data,
wherein the HARQ-ACK signal is transmitted after a processing time from receiving the downlink data,
wherein, based on a downlink TTI length for the downlink data and an uplink TTI length for the HARQ-ACK signal being different;
the processing time is configured in units of at least one of the downlink TTI length and the uplink TTI length, and
based on a first transmission timing of an uplink control channel for HARQ-ACK signal and a second transmission timing of a 2-symbol short Physical Uplink Shared Channel (sPUSCH) overlapping;
based on the downlink TTI length being shorter than a predetermined length, the uplink control channel is transmitted and the 2-symbol sPUSCH is dropped, and
based on the downlink TTI length being equal to or longer than the predetermined length, the uplink control channel is dropped, the 2-symbol sPUSCH is transmitted and uplink control information (UCI) for the uplink control channel is piggybacked to the 2-symbol sPUSCH.
2. The method of claim 1 , wherein the processing time is a combination of the downlink TTI length and the uplink TTI length.
3. The method of claim 1 , wherein, based on the unit of the processing time being smaller than a time unit of the uplink TTI length, the HARQ-ACK signal is transmitted in a next time unit following the time unit of the uplink TTI length overlapping with a first processing time unit.
4. The method of claim 1 , wherein, based on the unit of the processing time being larger than a time unit of the uplink TTI length, the HARQ-ACK signal is transmitted in a first one of time units of the uplink TTI length overlapping with a second processing time unit after the processing time.
5. A user equipment (UE) for transmitting Hybrid Automatic Repeat Request-Acknowledgment (HARQ-ACK) signal in a wireless communication system supporting a plurality of transmission time interval (TTI) length, the UE comprising:
a receiver and a transmitter; and
a processor configured to control the receiver and the transmitter,
wherein the processor is further configured to:
receive downlink data; and
transmit a HARQ-ACK signal related to the downlink data,
wherein the HARQ-ACK signal is transmitted after a processing time from receiving the downlink data,
wherein, based on a downlink TTI length for the downlink data and an uplink TTI length for the HARQ-ACK signal being different;
the processing time is configured in units of at least one of the downlink TTI length and the uplink TTI length, and
based on a first transmission timing of an uplink control channel for HARQ-ACK signal and a second transmission timing of a 2-symbol short Physical Uplink Shared Channel (sPUSCH) overlapping;
based on the downlink TTI length being shorter than a predetermined length, the uplink control channel is transmitted and the 2-symbol sPUSCH is dropped, and
based on the downlink TTI length being equal to or longer than the predetermined length, the uplink control channel is dropped, the 2-symbol sPUSCH is transmitted and uplink control information (UCI) for the uplink control channel is piggybacked to the 2-symbol sPUSCH.
6. The UE of claim 5 , wherein the processing time is a combination of the downlink TTI length and the uplink TTI length.
7. The UE of claim 5 , wherein, based on the unit of the processing time being smaller than a time unit of the uplink TTI length, the HARQ-ACK signal is transmitted in a next time unit following the time unit of the uplink TTI length overlapping with a first processing time unit.
8. The UE of claim 5 , wherein, based on the unit of the processing time being larger than a time unit of the uplink TTI length, the HARQ-ACK signal is transmitted in a first one of time units of the uplink TTI length overlapping with a second processing time unit after the processing time.