CSI report configuration with a codebook list
Certain aspects of the present disclosure provide techniques for a channel state information (CSI) report configuration with a codebook list, for example, for non-coherent joint transmission (NCJT). A method for wireless communication that can be performed by a user equipment (UE) includes receiving a CSI report configuration. The CSI report configuration is associated with one or more CSI reference signal (RS) resources. Each CSI-RS resource includes a set of ports or port groups. The UE receives a list of codebooks associated with the configuration. The UE determines at least one codebook, from the list of codebooks, to apply for one or more triggered CSI-RS resources.
1. A method for wireless communication by a user equipment (UE), the method comprising:
receiving a channel state information (CSI) report configuration, wherein the CSI report configuration is associated with one or more CSI reference signal (CSI-RS) resources, each of the one or more CSI-RS resources comprising a set of ports or port groups, wherein the one or more CSI-RS resources or the set of ports or port groups are indexed;
receiving a list of a plurality of codebooks for the CSI report configuration, wherein each codebook of the plurality of codebooks is associated with a subset of the one or more CSI-RS resources, ports, or port groups of the CSI report configuration, and wherein the list of the plurality of codebooks is an ordered list; and
determining at least one codebook, from the list of the plurality of codebooks, to apply for one or more triggered CSI-RS resources of the one or more CSI-RS resources associated with the CSI report configuration, wherein the determining comprises determining, for each triggered CSI-RS resource of the one or more triggered CSI-RS resources, the codebook, in the list of codebooks, having an order corresponding to an index of the triggered CSI-RS resource.
2. The method of claim 1 , wherein:
the one or more CSI-RS resources comprises one or more non-zero power (NZP) CSI-RS resources for channel measurement (CM); and
the list of the plurality of codebooks is associated with the one or more NZP CSI-RS resources for CM.
3. The method of claim 1 , wherein a number of the codebooks in the list of the plurality of codebooks is equal to a total number of the one or more CSI-RS resources or a total number of the port groups in the CSI report configuration.
4. A method for wireless communication by a user equipment (UE), the method comprising:
receiving a channel state information (CSI) report configuration, wherein the CSI report configuration is associated with one or more CSI reference signal (CSI-RS) resources, each of the one or more CSI-RS resources comprising a set of ports or port groups;
receiving a list of a plurality of codebooks for the CSI report configuration, wherein each codebook of the plurality of codebooks is associated with a subset of the one or more CSI-RS resources, ports, or port groups of the CSI report configuration, and wherein the codebooks in the list of the plurality of codebooks comprise codebooks having at least one of: different codebook types, different port configurations, or different numbers of ports; and
selecting, for each triggered CSI-RS of the one or more triggered CSI-RS resources, the codebook, in the list of codebooks, having a same number of ports or a same number of ports for a port group as the triggered CSI-RS resource.
5. The method of claim 1 , wherein the CSI report configuration is received via radio resource control (RRC) signaling.
6. The method of claim 1 , wherein the CSI report configuration configures the UE for at least one of: an aperiodic CSI report, a periodic CSI report, or a semi-persistent CSI report.
7. The method of claim 1 , wherein the CSI report configuration configures the UE to report at least one of: a CSI resource indicator (CRI), a rank indicator (RI), a precoding matrix indicator (PMI), or a channel quality indicator (CQI).
8. The method of claim 7 , further comprising:
receiving one or more CSI-RS on the one or more triggered CSI-RS resources;
measuring the ports associated with the one or more triggered CSI-RS resources;
selecting one or more preferred CSI-RS resources based on the measurements; and
transmitting a CSI report including CRI indicating the selected one or more preferred CSI-RS resources and including RI, PMI, and CQI for the selected one or more preferred CSI-RS resources using the determined at least one codebook from the list of the plurality of codebooks.
9. A method for wireless communication by a base station (BS), the method comprising:
providing a user equipment (UE) with a channel state information (CSI) report configuration, the CSI report configuration being associated with one or more CSI reference signal (CSI-RS) resources, each of the one or more CSI-RS resources comprising a set of ports or port groups, wherein the one or more CSI-RS resources or the set of ports or port groups are indexed; and
providing the UE with a list of a plurality of codebooks for the CSI report configuration, wherein each codebook of the plurality of codebooks is associated with a subset of the one or more CSI-RS resources, ports, or port groups of the CSI report configuration, wherein the list of the plurality of codebooks is an ordered list, and wherein each codebook in the list has an order corresponding to an index of one of the one or more CSI-RS resources.
10. The method of claim 9 , wherein:
the one or more CSI-RS resources comprises one or more non-zero power (NZP) CSI-RS resources for channel measurement (CM); and
the list of the plurality of codebooks is associated with the one or more NZP CSI-RS resources for CM.
11. The method of claim 9 , wherein a number of the codebooks in the list of the plurality of codebooks is equal to a total number of the one or more CSI-RS resources or a total number of the port groups in all of the one or more CSI-RS resources in the CSI report configuration.
12. A method for wireless communication by a base station (BS), the method comprising:
providing a user equipment (UE) with a channel state information (CSI) report configuration, the CSI report configuration being associated with one or more CSI reference signal (CSI-RS) resources, each of the one or more CSI-RS resources comprising a set of ports or port groups; and
providing the UE with a list of a plurality of codebooks for the CSI report configuration, wherein each codebook of the plurality of codebooks is associated with a subset of the one or more CSI-RS resources, ports, or port groups of the CSI report configuration, wherein the codebooks in the list of the plurality of codebooks comprises codebooks having at least one of:
different codebook types, different port configurations, or different numbers of ports, and wherein each of the codebooks in the list of the plurality of codebooks has a same number of ports or a same number ports for a port group as a CSI-RS resource of the one or more CSI-RS resources in the CSI report configuration.
13. The method of claim 9 , wherein the CSI report configuration is provided via radio resource control (RRC) signaling.
14. The method of claim 9 , wherein the CSI report configuration configures the UE for at least one of: an aperiodic CSI report, a semi-persistent CSI report, or a periodic CSI report.
15. The method of claim 9 , wherein the CSI report configuration configures the UE to report at least one of: a CSI resource indicator (CRI), a rank indicator (RI), a precoding matrix indicator (PMI), or a channel quality indicator (CQI).
16. The method of claim 15 , further comprising receiving a CSI report from the UE including CRI indicating selected CSI-RS resources and including RI, PMI, and CQI for the selected CSI-RS resources using the associated codebook from the list of the plurality of codebooks.
17. The method of claim 1 , wherein a first CSI-RS resource of the one or more triggered CSI-RS resources is associated with a first transmit-receive point (TRP) and a second CSI-RS resource of the one or more triggered CSI-RS resources is associated with a second TRP.
18. The method of claim 17 , wherein the determining the at least one codebook from the list of the plurality of codebooks comprises determining a first codebook for the first CSI-RS resource and a second codebook for the second CSI-RS resource.