User Equipment (UE), Generation Node-B (GNB) and Methods for Signaling of Control Information for Pre-Coding

Abstract

Embodiments of a User Equipment (UE), a generation Node-B (gNB) and methods for communication are generally described herein. The UE may the UE 102 may receive from a gNB, control signaling that indicates: a first pre-coding matrix indicator (PMI) that indicates a first pre-coder for a first sub-band; and a second PMI that indicates a second pre-coder for a second sub-band. The first and second pre-coders may be included in predetermined candidate pre-coders. The UE may encode a physical uplink shared channel (PUSCH) block for transmission. The UE may scale the PUSCH block in the first sub-band by the first pre-coder. The UE may scale the PUSCH block in the second sub-band by the second pre-coder.

1 . (canceled) 
     
     
         2 .- 22 . (canceled) 
     
     
         23 . An apparatus, comprising:
 a memory; and   at least one processor in communication with the memory and configured to:
 generate an indication of a channel state information reference signal (CSI-RS) index of a CSI-RS resource of a plurality of CSI-RS resources in an uplink grant as part of a non-codebook based precoding method, wherein the CSI-RS index is used in a non-codebook based uplink precoding operation associated with the uplink grant; and 
 receive an uplink transmission associated with the uplink grant based on the CSI-RS index. 
   
     
     
         24 . The apparatus of  claim 23 ,
 wherein the non-codebook based uplink precoding operation includes using CSI-RS resources associated with the CSI-RS index to calculate uplink precodings.   
     
     
         25 . The apparatus of  claim 23 ,
 wherein the at least one processor is further configured to:
 transmit using the plurality of CSI-RS resources, wherein respective CSI-RS resources are associated with respective beams at a base station. 
   
     
     
         26 . The apparatus of  claim 23 ,
 wherein the uplink grant indicates an index associated with the apparatus for transmission of the uplink transmission.   
     
     
         27 . The apparatus of  claim 23 ,
 wherein the uplink grant indicates a carrier index for transmission of the uplink transmission.   
     
     
         28 . The apparatus of  claim 23 ,
 wherein the uplink grant is sent using downlink control information (DCI).   
     
     
         29 . The apparatus of  claim 23 ,
 wherein uplink and downlink channels are reciprocal.   
     
     
         30 . A method, comprising:
 a base station,
 providing an indication of a channel state information reference signal (CSI-RS) index of a CSI-RS resource of a plurality of CSI-RS resources in an uplink grant in accordance with a non-codebook based precoding method, wherein the CSI-RS index is used in a non-codebook based uplink precoding operation associated with the uplink grant; and 
 receiving an uplink transmission associated with the uplink grant based on the CSI-RS index. 
   
     
     
         31 . The method of  claim 30 ,
 wherein the non-codebook based uplink precoding operation includes using CSI-RS resources associated with the CSI-RS index to calculate uplink precodings.   
     
     
         32 . The method of  claim 30 , further comprising:
 the base station,
 transmitting using the plurality of CSI-RS resources, wherein respective CSI-RS resources are associated with respective beams at the base station. 
   
     
     
         33 . The method of  claim 30 ,
 wherein the uplink grant indicates an index associated with the apparatus for transmission of the uplink transmission.   
     
     
         34 . The method of  claim 30 ,
 wherein the uplink grant indicates a carrier index for transmission of the uplink transmission.   
     
     
         35 . The method of  claim 30 ,
 wherein the uplink grant is sent using downlink control information (DCI).   
     
     
         36 . The method of  claim 30 ,
 wherein uplink and downlink channels are reciprocal.   
     
     
         37 . A method, comprising:
 a user equipment (UE),
 receiving, as part of a non-codebook based precoding method, an indication of a channel state information reference signal (CSI-RS) index of the CSI-RS resource of the plurality of CSI-RS resources in an uplink grant, wherein the CSI-RS index is used in a non-codebook based uplink precoding operation associated with the uplink grant; and 
 transmitting an uplink transmission associated with the uplink grant based on the CSI-RS index. 
   
     
     
         38 . The method of  claim 37 ,
 wherein the non-codebook based uplink precoding operation includes using CSI-RS resources associated with the CSI-RS index to calculate uplink precodings.   
     
     
         39 . The method of  claim 37 , further comprising:
 the UE,
 receiving, from a base station, a plurality of channel state information reference signal (CSI-RS) resources, wherein respective CSI-RS resources are associated with respective beams at the base station. 
   
     
     
         40 . The method of  claim 37 ,
 wherein the uplink grant indicates an index associated with the apparatus for transmission of the uplink transmission.   
     
     
         41 . The method of  claim 37 ,
 wherein the uplink grant indicates a carrier index for transmission of the uplink transmission.   
     
     
         42 . The method of  claim 37 ,
 wherein the uplink grant is received using downlink control information (DCI).