TRP-Specific PUSCH Transmissions for Multi-TRP Operation

Abstract

A user equipment (UE) is configured to communicate with one or more transmission and reception points (TRPS). The UE receives a sounding reference signal (SRS) resource set configuration including a first resource set corresponding to a first transmission and reception point (TRP) and a second resource set corresponding to a second TRP, receives a downlink control information (DCI) transmission including an SRS resource indicator (SRI) indicating (i) which resource from the first resource set should be selected for a first physical uplink shared channel (PUSCH) transmission to a first TRP, and (ii) which resource from the second resource set should be selected for a second PUSCH transmission to a second TRP and transmits the first PUSCH transmission to the first TRP and the second PUSCH transmission to the second TRP.

1 - 29 . (canceled) 
     
     
         30 . A processor of a base station configured to perform operations comprising:
 transmitting, to a user equipment (UE), a sounding reference signal (SRS) resource set configuration including a first resource set corresponding to a first transmission and reception point (TRP) and a second resource set corresponding to a second TRP;   transmitting, to the UE, a downlink control information (DCI) transmission including an SRS resource indicator (SRI) indicating (i) which resource from the first resource set should be selected for a first physical uplink shared channel (PUSCH) transmission to a first TRP, and (ii) which resource from the second resource set should be selected for a second PUSCH transmission to a second TRP; and   receiving, from the UE, the first PUSCH transmission to the first TRP and the second PUSCH transmission to the second TRP.   
     
     
         31 . The processor of  claim 30 , wherein the first SRS resource set and the second SRS resource set are configured for one of (i) codebook use, or (ii) nonCodebook use. 
     
     
         32 . The processor of  claim 31 , wherein the SRI includes a first SRI corresponding to a first SRS resource of the first SRS resource set and a second SRI corresponding to a second SRS resource of the second resource set. 
     
     
         33 . The processor of  claim 32 , wherein a first half of an SRI field of the DCI transmission corresponds to the first SRI and a second half of the SRI field corresponds to the second SRI. 
     
     
         34 . The processor of  claim 32 , wherein the DCI transmission comprises:
 a first SRI field including the first SRI; and   a second SRI field including the second SRI.   
     
     
         35 . The processor of  claim 32 , wherein, when the multiple SRS resource sets are configured for nonCodebook use, the first and second SRIs are jointly encoded. 
     
     
         36 . The processor of  claim 35 , wherein the first and second SRIs have the same number of layers. 
     
     
         37 . The processor of  claim 31 , wherein the DCI transmission includes a single SRI field including the SRI indicating a same resource index of both the first SRS resource set and the second SRS resource set to be selected. 
     
     
         38 . The processor of  claim 31 , wherein, when the multiple SRS resource sets are configured for Codebook use, the DCI transmission further comprises:
 a transmitted precoding matrix indicator (TPMI) corresponding to each of a first SRS resource in the first SRS resource set and a second SRS resource of the second SRS resource set.   
     
     
         39 . The processor of  claim 38 , wherein the TPMI includes a first TPMI corresponding to the first SRS resource and a second TPMI corresponding to the second SRS resource. 
     
     
         40 . The processor of  claim 39 , wherein a first half of a TPMI field of the DCI transmission corresponds to the first TPMI and a second half of the TPMI field corresponds to the second TPMI. 
     
     
         41 . The processor of  claim 39 , wherein the DCI transmission comprises:
 a first TPMI field including the first TPMI; and   a second TPMI field including the second TPMI.   
     
     
         42 . The processor of  claim 39 , wherein the first and second TPMIs are jointly encoded. 
     
     
         43 . The processor of  claim 42 , wherein the first and second TPMIs have the same number of layers. 
     
     
         44 . The processor of  claim 40 , wherein the DCI transmission includes a single TPMI field including the TPMI for both the first and second SRS resources. 
     
     
         45 . A base station, comprising:
 a transceiver configured to communicate with a user equipment (UE); and   a processor communicatively coupled to the transceiver and configured to:   configure the transceiver to transmit, to the UE, a sounding reference signal (SRS) resource set configuration including a first resource set corresponding to a first transmission and reception point (TRP) and a second resource set corresponding to a second TRP;   configure the transceiver to transmit, to the UE, a downlink control information (DCI) transmission including an SRS resource indicator (SRI) indicating (i) which resource from the first resource set should be selected for a first physical uplink shared channel (PUSCH) transmission to a first TRP, and (ii) which resource from the second resource set should be selected for a second PUSCH transmission to a second TRP; and   receive, from the UE, the first PUSCH transmission to the first TRP and the second PUSCH transmission to the second TRP.   
     
     
         46 . The base station of  claim 45 , wherein the first SRS resource set and the second SRS resource set are configured for one of (i) codebook use, or (ii) nonCodebook use. 
     
     
         47 . The base station of  claim 46 , wherein the SRI includes a first SRI corresponding to a first SRS resource of the first SRS resource set and a second SRI corresponding to a second SRS resource of the second resource set. 
     
     
         48 . The base station of  claim 47 , wherein a first half of an SRI field of the DCI transmission corresponds to the first SRI and a second half of the SRI field corresponds to the second SRI. 
     
     
         49 . The base station of  claim 47 , wherein the DCI transmission comprises:
 a first SRI field including the first SRI; and   a second SRI field including the second SRI.