Method and apparatus for reciprocity based CSI-RS transmission and reception
A method for operating a user equipment (UE) comprises receiving information about a measurement region that is associated with P ports, where P≥10 and based on the information, identifying the measurement region, measuring the P ports associated with the measurement region, and determining a channel state information (CSI) report based on the measurement, and transmitting the CSI report. The information about the measurement region includes at least two of (i) a set of physical resource blocks (PRBs), (ii) a set of time slots, and (iii) a set of CSI-reference signal (RS) resources. P×O f =Q, where Q is a number of precoding dimensions, O f =a number of precoding dimensions per port associated with the CSI report, and O f is fixed, configured, or reported by the UE via UE capability reporting.
1. A user equipment (UE) comprising:
a transceiver configured to receive information about a measurement region that is associated with P ports, where P ≥1; and
a processor operably coupled to the transceiver, the processor, based on the information, configured to:
identity the measurement region,
measure the P ports associated with the measurement region, and
determine a channel state information (CSI) report based on the measurement;
wherein the transceiver is further configured to transmit the CSI report,
wherein the information about the measurement region includes at least two of (i) a set of physical resource blocks (PRBs), (ii) a set of time slots, and (iii) a set of CSI-reference signal (RS) resources, and
wherein:
P×O f =Q, where Q is a number of precoding dimensions,
O f =a number of precoding dimensions per port associated with the CSI report, and
O f is fixed, configured, or reported by the UE via UE capability reporting.
2. The UE of claim 1 , wherein the P ports are measured (i) within each PRB of the set of PRBs and (ii) across the set of time slots.
3. The UE of claim 2 , wherein the set of time slots corresponds to one of:
a multi-shot transmission of a single CSI-RS resource in the set of time slots with a separation between two consecutive time slots configured to the UE, and
a one-shot transmission of multiple CSI-RS resources that are separated in time and included in the set of CSI-RS resources.
4. The UE of claim 1 , wherein the P ports are measured within a frequency domain (FD) unit and across the set of time slots, where the FD unit comprises multiple PRBs from the set of PRBs.
5. The UE of claim 1 , wherein the P ports are measured within a frequency domain (FD) unit and across the set of CSI-RS resources.
6. The UE of claim 1 , wherein the P ports are measured across the set of time slots and the set of CSI-RS resources, where the set of CSI-RS resources are measured within each PRB of the set of PRBs.
7. The UE of claim 1 , wherein the P ports are measured across the set of PRBs, the set of time slots, and the set of CSI-RS resources, where the set of CSI-RS resources are measured within each PRB of the set of PRBs.
8. The UE of claim 1 , wherein:
the measurement region is associated with a port density d, where a value of the port density is configured such that Q precoding dimensions are conveyed based on the P ports and where P≠Q,
the port density d is one of a set of values, and
the set of values is reported by the UE as a UE capability reporting.
9. A method performed by a user equipment (UE), the method comprising:
receiving information about a measurement region that is associated with P ports, where P≥10;
based on the information,
identifying the measurement region,
measuring the P ports associated with the measurement region, and
determining a channel state information (CSI) report based on the measurement; and
transmitting the CSI report,
wherein the information about the measurement region includes at least two of (i) a set of physical resource blocks (PRBs), (ii) a set of time slots, and (iii) a set of CSI-reference signal (RS) resources, and
wherein:
P×O f =Q, where Q is a number of precoding dimensions,
O f =a number of precoding dimensions per port associated with the CSI report, and
O f is fixed, configured, or reported by the UE via UE capability reporting.
10. The method of claim 9 , wherein the P ports are measured (i) within each PRB of the set of PRBs and (ii) across the set of time slots.
11. The method of claim 10 , wherein the set of time slots corresponds to one of:
a multi-shot transmission of a single CSI-RS resource in the set of time slots with a separation between two consecutive time slots configured to the UE, and
a one-shot transmission of multiple CSI-RS resources that are separated in time and included in the set of CSI-RS resources.
12. The method of claim 9 , wherein the P ports are measured within a frequency domain (FD) unit and across the set of time slots, where the FD unit comprises multiple PRBs from the set of PRBs.
13. The method of claim 9 , wherein the P ports are measured within a frequency domain (FD) unit and across the set of CSI-RS resources.
14. The method of claim 9 , wherein the P ports are measured across the set of time slots and the set of CSI-RS resources, where the set of CSI-RS resources are measured within each PRB of the set of PRBs.
15. The method of claim 9 , wherein the P ports are measured across the set of PRBs, the set of time slots, and the set of CSI-RS resources, where the set of CSI-RS resources are measured within each PRB of the set of PRBs.
16. A base station (BS) comprising:
a processor; and
a transceiver operably coupled to the processor, the transceiver configured to:
transmit information about a measurement region that is associated with P ports, where P≥17; and
receive a channel state information (CSI) report that is based on the P ports associated with the measurement region,
wherein the information about the measurement region includes at least two of (i) a set of physical resource blocks (PRBs), (ii) a set of time slots, and (iii) a set of CSI-reference signal (RS) resources, and
wherein:
P×O f =Q, where Q is a number of precoding dimensions,
O f =a number of precoding dimensions per port associated with the CSI report, and
O f is fixed, configured, or reported by a user equipment (UE) via UE capability reporting.
17. The BS of claim 16 , wherein the P ports are measured (i) within each PRB of the set of PRBs and (ii) across the set of time slots.
18. The BS of claim 17 , wherein the set of time slots corresponds to one of:
a multi-shot transmission of a single CSI-RS resource in the set of time slots with a separation between two consecutive time slots configured to the UE, and
a one-shot transmission of multiple CSI-RS resources that are separated in time and included in the set of CSI-RS resources.
19. The BS of claim 16 , wherein the P ports are measured within a frequency domain (FD) unit and across the set of time slots, where the FD unit comprises multiple PRBs from the set of PRBs.