Method and apparatus for transmitting or receiving uplink signal for terminal supporting short tti in wireless communication system

Abstract

An uplink transmitting method for a user equipment (UE) for supporting a short transmission time interval (TTI) in a wireless communication includes receiving downlink control information including uplink grant, and when a transmitting timing of an uplink signal corresponding to the uplink grant and a transmission timing of a semi-persistent (SPS) uplink signal overlap with each other, if a TTI length of a first channel in which the uplink signal corresponding to the uplink grant is to be transmitted is longer than a TTI length of a second channel in which the SPS uplink signal is to be transmitted, performing uplink signal transmission only on the second channel of the first channel and the second channel at the transmission timing.

1 . A method for transmitting an uplink signal by a user equipment supporting uplink transmissions having different transmission time interval (TTI) lengths in a wireless communication, the method comprising:
 receiving configuration information indicating a resource set for a semi-persistently scheduled (SPS) uplink transmission; and   performing the SPS uplink transmission in the indicated resource set,   wherein, when the SPS uplink transmission overlaps in time with an uplink transmission scheduled by uplink grant downlink control information (DCI) and the SPS uplink transmission has a shorter TTI length than the uplink transmission scheduled by the uplink grant DCI, the uplink transmission scheduled by the uplink grant DCI is dropped.   
     
     
         2 . The method according to  claim 1 , wherein the uplink transmission scheduled by the uplink grant DCI has a length corresponding to a subframe length. 
     
     
         3 . The method according to  claim 1 , wherein the SPS uplink transmission has a length equal to or smaller than a slot length. 
     
     
         4 . The method according to  claim 1 , wherein the SPS uplink transmission is performed through a physical uplink shared channel (PUSCH). 
     
     
         5 . The method according to  claim 1 , wherein the uplink grant DCI is received through a physical downlink control channel (PDCCH). 
     
     
         6 . The method according to  claim 1 , wherein uplink control information is transmitted through the SPS uplink transmission. 
     
     
         7 . The method according to  claim 6 , wherein the uplink control information includes hybrid automatic repeat request acknowledgement (HARQ-ACK) information. 
     
     
         8 . A user equipment for transmitting an uplink signal in a wireless communication system, the user equipment supporting uplink transmissions having different transmission time interval (TTI) lengths and comprising:
 a receiver and a transmitter; and   a processor operatively connected to the receiver and the transmitter and configured to:   control the receiver to receive configuration information indicating a resource set for a semi-persistently scheduled (SPS) uplink transmission, and   control the transmitter to perform the SPS uplink transmission in the indicated resource set,   wherein, when the SPS uplink transmission overlaps in time with an uplink transmission scheduled by uplink grant downlink control information (DCI) and the SPS uplink transmission has a shorter TTI length than the uplink transmission scheduled by the uplink grant DCI, the uplink transmission scheduled by the uplink grant DCI is dropped.   
     
     
         9 . The user equipment according to  claim 8 , wherein the uplink transmission scheduled by the uplink grant DCI has a length corresponding to a subframe length. 
     
     
         10 . The user equipment according to  claim 8 , wherein the SPS uplink transmission has a length equal to or smaller than a slot length. 
     
     
         11 . The user equipment according to  claim 8 , wherein the SPS uplink transmission is performed through a physical uplink shared channel (PUSCH). 
     
     
         12 . The user equipment according to  claim 8 , wherein the uplink grant DCI is received through a physical downlink control channel (PDCCH). 
     
     
         13 . The user equipment according to  claim 8 , wherein uplink control information is transmitted through the SPS uplink transmission. 
     
     
         14 . The user equipment according to  claim 13 , wherein the uplink control information includes hybrid automatic repeat request acknowledgement (HARQ-ACK) information. 
     
     
         15 . A processor for a wireless communication device supporting uplink transmissions having different transmission time interval (TTI) lengths, wherein the processor is configured to control the wireless communication device to perform:
 receiving configuration information indicating a resource set for a semi-persistently scheduled (SPS) uplink transmission; and   performing the SPS uplink transmission in the indicated resource set,   wherein, when the SPS uplink transmission overlaps in time with an uplink transmission scheduled by uplink grant downlink control information (DCI) and the SPS uplink transmission has a shorter TTI length than the uplink transmission scheduled by the uplink grant DCI, the uplink transmission scheduled by the uplink grant DCI is dropped.   
     
     
         16 . The processor according to  claim 15 , wherein the uplink transmission scheduled by the uplink grant DCI has a length corresponding to a subframe length. 
     
     
         17 . The processor according to  claim 15 , wherein the SPS uplink transmission has a length equal to or smaller than a slot length. 
     
     
         18 . The processor according to  claim 15 , wherein the SPS uplink transmission is performed through a physical uplink shared channel (PUSCH). 
     
     
         19 . The processor according to  claim 15 , wherein the uplink grant DCI is received through a physical downlink control channel (PDCCH). 
     
     
         20 . The processor according to  claim 15 , wherein uplink control information is transmitted through the SPS uplink transmission.