Method and device for transmitting and receiving harq-ack feedback in wireless communication system

Abstract

Provided is a method, performed by a terminal, for transmitting hybrid automatic repeat request-acknowledgement (HARQ-ACK) information in a wireless communication system, the method including: receiving a first physical downlink shared channel (PDSCH) from a first transmission and reception point (TRP) and receiving a second PDSCH from a second TRP; and transmitting at least one HARQ-ACK codebook including first HARQ-ACK bits for the first PDSCH and second HARQ-ACK bits for the second PDSCH, wherein the first PDSCH and the second PDSCH are joint-transmitted from the first TRP and the second TRP, based on different pieces of downlink control information (DCI).

1 . A method, performed by a terminal, for transmitting hybrid automatic repeat request-acknowledgement (HARQ-ACK) information in a wireless communication system, the method comprising:
 receiving a first physical downlink shared channel (PDSCH) from a first transmission and reception point (TRP) and receiving a second PDSCH from a second TRP; and   transmitting at least one HARQ-ACK codebook including first HARQ-ACK bits for the first PDSCH and second HARQ-ACK bits for the second PDSCH,   wherein the first PDSCH and the second PDSCH are joint-transmitted from the first TRP and the second TRP, based on different pieces of downlink control information (DCI).   
     
     
         2 . The method of  claim 1 , further comprising generating a first HARQ-ACK codebook including the first HARQ-ACK bits and a second HARQ-ACK codebook including the second HARQ-ACK bits. 
     
     
         3 . The method of  claim 2 , wherein the transmitting of the at least one HARQ-ACK codebook comprises:
 transmitting a first physical uplink control channel (PUCCH) including the first HARQ-ACK codebook; and   transmitting a second PUCCH including the second HARQ-ACK codebook.   
     
     
         4 . The method of  claim 3 , wherein the first PUCCH and the second PUCCH are transmitted without an overlapping symbol in one slot. 
     
     
         5 . The method of  claim 2 , further comprising receiving, from a base station, higher layer signaling including information indicating to separately generate an HARQ-ACK codebook for the first HARQ-ACK bits and an HARQ-ACK codebook for the second HARQ-ACK bits. 
     
     
         6 . The method of  claim 1 , further comprising generating a third HARQ-ACK codebook including the first HARQ-ACK bits and the second HARQ-ACK bits. 
     
     
         7 . The method of  claim 6 , wherein the transmitting of the at least one HARQ-ACK codebook comprises transmitting at least one PUCCH including the third HARQ-ACK codebook. 
     
     
         8 . The method of  claim 1 , wherein each of the at least one HARQ-ACK codebook is one of a semi-static HARQ-ACK codebook or a dynamic HARQ-ACK codebook. 
     
     
         9 . The method of  claim 1 , further comprising determining whether to separately generate an HARQ-ACK codebook for the first HARQ-ACK bits and an HARQ-ACK codebook for the second HARQ-ACK bits, depending on whether PUCCHs respectively indicated by the different pieces of DCI overlap each other. 
     
     
         10 . A terminal for transmitting hybrid automatic repeat request-acknowledgement (HARQ-ACK) information in a wireless communication system, the terminal comprising:
 a transceiver, and   at least one processor coupled to the transceiver and configured to:   receive a first physical downlink shared channel (PDSCH) from a first transmission and reception point (TRP) and receive a second PDSCH from a second TRP; and   transmit at least one HARQ-ACK codebook including first HARQ-ACK bits for the first PDSCH and second HARQ-ACK bits for the second PDSCH,   wherein the first PDSCH and the second PDSCH are joint-transmitted from the first TRP and the second TRP, based on different pieces of downlink control information (DCI).   
     
     
         11 . The terminal of  claim 10 , wherein the at least one processor is further configured to generate a first HARQ-ACK codebook including the first HARQ-ACK bits and a second HARQ-ACK codebook including the second HARQ-ACK bits. 
     
     
         12 . The terminal of  claim 11 , wherein the at least one processor is further configured to:
 transmit a first physical uplink control channel (PUCCH) including the first HARQ-ACK codebook; and   transmit a second PUCCH including the second HARQ-ACK codebook.   
     
     
         13 . The terminal of  claim 11 , wherein the at least one processor is further configured to receive, from a base station, higher layer signaling including information indicating to separately generate an HARQ-ACK codebook for the first HARQ-ACK bits and an HARQ-ACK codebook for the second HARQ-ACK bits. 
     
     
         14 . The terminal of  claim 10 , wherein the at least one processor is further configured to generate a third HARQ-ACK codebook including the first HARQ-ACK bits and the second HARQ-ACK bits. 
     
     
         15 . The terminal of  claim 14 , wherein the at least one processor is further configured to transmit at least one PUCCH including the third HARQ-ACK codebook.