User equipment antenna panel distribution reporting
Certain aspects of the present disclosure provide techniques for user equipment (UE) antenna panel distribution reporting. Particular aspects provide a method performed by a user equipment (UE), which generally includes determining a set of antenna panels of the UE for uplink antenna panel selection based on at least one criterion and transmitting a report to a base station (BS) including an indication of the determined set of antenna panels of the UE.
1. A method for wireless communication by a user equipment (UE), comprising:
determining a set of antenna panels of the UE for uplink antenna panel selection based on whether antenna panels included in the determined set of antenna panels share a same set of operation parameters, wherein operation parameters in the same set of operation parameters include at least one of an uplink (UL) time advance, an uplink transmission power, or uplink power control parameters; and
transmitting a report to a base station (BS) indicating the determined set of antenna panels of the UE.
2. The method of claim 1 , wherein determining the set of antenna panels is based further on a distance between the antenna panels included in the determined set of antenna panels.
3. The method of claim 2 , further comprising:
selecting a first antenna panel to include in the determined set of antenna panels; and
selecting at least a second antenna panel to include in the determined set of antenna panels based on a distance between the first antenna panel and the second antenna panel being less than or equal to a threshold distance.
4. The method of claim 3 , wherein the indication of the determined set of antenna panels comprises at least one of:
a first antenna panel identifier (ID) corresponding to the first antenna panel;
a second antenna panel ID corresponding to the second antenna panel; or
an antenna panel group ID of an antenna panel group that includes at least the first antenna panel and the second antenna panel.
5. The method of claim 3 , wherein the threshold distance is at least one of:
defined in a wireless communications standard;
received in radio resource control (RRC) signaling from the BS;
received in a media access control control element (MAC-CE) from the BS; or
received in downlink control information (DCI) from the BS.
6. The method of claim 1 , further comprising:
selecting a first antenna panel to include in the set of antenna panels; and
selecting at least a second antenna panel to include in the set of antenna panels based on the second antenna panel sharing the same set of operation parameters with the first antenna panel.
7. The method of claim 6 , wherein the indication of the determined set of antenna panels comprises at least one of:
a first antenna panel identifier (ID) corresponding to the first antenna panel;
a second antenna panel ID corresponding to the second antenna panel; or
an antenna panel group ID of an antenna panel group that includes at least the first antenna panel and the second antenna panel.
8. The method of claim 1 , further comprising receiving configuration information for one or more antenna panels of the UE included in the determined set of antenna panels indicated to the BS.
9. The method of claim 8 , wherein the configuration information comprises a same set of operation parameters for each antenna panel of the one or more antenna panels of the UE in the determined set of antenna panels.
10. The method of claim 1 , wherein:
the determined set of antenna panels includes at least a first antenna panel and a second antenna panel; and
at least one of:
a distance between the first antenna panel and the second antenna panel is less than or equal to a threshold distance; or
the first antenna panel and the second antenna panel share a same set of operation parameters.
11. The method of claim 10 , further comprising:
transmitting uplink signaling via the first antenna panel;
detecting a maximum permissible exposure (MPE) event involving the first antenna panel; and
switching to the second antenna panel to transmit the uplink signaling in response to the detected MPE event, wherein switching to the second antenna panel is based on one of:
a defined rule shared between the UE and the BS;
signaling transmitted from the UE to the BS indicating that the UE is switching to the second antenna panel;
signaling received from the BS indicating to switch to the second antenna panel; or
a determination to switch to the second antenna panel without transmission of signaling to the BS indicating that the UE is switching to the second antenna panel.
12. The method of claim 1 , further comprising receiving a request from the BS to report the indicated set of antenna panels of the UE, wherein determining the set of antenna panels of the UE is based on the received request.
13. The method of claim 12 , wherein the request is received in channel state information (CSI) reporting configuration information or a UE capability information enquiry.
14. The method of claim 1 , wherein the indication of the determined set of antenna panels of the UE comprises at least one of:
a different antenna panel identifier (ID) for each antenna panel included in the determined set of antenna panels; or
a group antenna panel ID for a group of antenna panels in the determined set of antenna panels.
15. The method of claim 14 , wherein at least one of the antenna panel ID or the group antenna panel ID comprises one or more of:
a beam group ID;
a transmission configuration indicator (TCI) state pool ID;
a sounding reference signal (SRS) resource group ID;
a control resource set (CORESET) pool ID; or
closed loop power control index.
16. A method for wireless communication by base station (BS), comprising:
receiving a report from a user equipment (UE) indicating a set of antenna panels of the UE for uplink antenna panel selection at the UE, wherein set of antenna panels is based on antenna panels included in the set of antenna panels sharing a same set of operation parameters, wherein operation parameters in the same set of operation parameters include at least one of an uplink (UL) time advance, an uplink transmission power, or uplink power control parameters; and
transmitting, to the UE, configuration information indicating a same set of operation parameters for antenna panels of the UE in the set of antenna panels.
17. The method of claim 16 , wherein the set of antenna panels is based further on a distance between the antenna panels included in the set of antenna panels.
18. The method of claim 17 , wherein:
a first antenna panel is included in the set of antenna panels; and
at least a second antenna panel is include in the set of antenna panels based on a distance between the first antenna panel and the second antenna panel being less than or equal to a threshold distance.
19. The method of claim 18 , wherein the indication of the set of antenna panels comprises at least one of:
a first antenna panel identifier (ID) corresponding to the first antenna panel;
a second antenna panel ID corresponding to the second antenna panel; or
an antenna panel group ID of an antenna panel group that includes at least the first antenna panel and the second antenna panel.
20. The method of claim 18 , wherein the threshold distance is at least one of:
defined in a wireless communications standard;
transmitted in radio resource control (RRC) signaling to the UE;
transmitted in a media access control control element (MAC-CE) to the UE; or
transmitted in downlink control information (DCI) to the UE.
21. The method of claim 16 , wherein:
a first antenna panel is included in the set of antenna panels; and
at least a second antenna panel is included in the set of antenna panels based on the second antenna panel sharing the same set of operation parameters with the first antenna panel.
22. The method of claim 21 , wherein the indication of the set of antenna panels comprises at least one of:
a first antenna panel identifier (ID) corresponding to the first antenna panel;
a second antenna panel ID corresponding to the second antenna panel; or
an antenna panel group ID of an antenna panel group that includes at least the first antenna panel and the second antenna panel.
23. The method of claim 16 , further comprising transmitting a request to the UE to report the indicated set of antenna panels of the UE, wherein receiving the report including the indication of the set of antenna panels of the UE is based on the transmitted request, wherein the request is transmitted in channel state information (CSI) reporting configuration information or a UE capability information enquiry.
24. The method of claim 16 , wherein:
the indication of the set of antenna panels of the UE comprises at least one of:
a different antenna panel identifier (ID) for each antenna panel included in the set of antenna panels; or
a group antenna panel ID for a group of antenna panels in the set of antenna panels; and
at least one of the antenna panel ID or the group antenna panel ID comprises one or more of:
a beam group ID;
a transmission configuration indicator (TCI) state pool ID;
a sounding reference signal (SRS) resource group ID;
a control resource set (CORESET) pool ID; or
closed loop power control index.
25. An apparatus for wireless communication by a user equipment (UE), comprising:
a memory comprising computer-executable instructions; and
one or more processors configured to execute the computer-executable instructions and cause the one or more processors to:
determine a set of antenna panels of the UE for uplink antenna panel selection based on whether antenna panels included in the determined set of antenna panels share a same set of operation parameters, wherein operation parameters in the same set of operation parameters include at least one of an uplink (UL) time advance, an uplink transmission power, or uplink power control parameters; and
transmit a report to a base station (BS) indicating the determined set of antenna panels of the UE.
26. An apparatus for wireless communication by a base station (BS), comprising:
a memory comprising computer-executable instructions; and
one or more processors configured to execute the computer-executable instructions and cause the one or more processors to:
receive a report from a user equipment (UE) indicating a set of antenna panels of the UE for uplink antenna panel selection at the UE, wherein set of antenna panels is based on antenna panels included in the set of antenna panels sharing a same set of operation parameters, wherein operation parameters in the same set of operation parameters include at least one of an uplink (UL) time advance, an uplink transmission power, or uplink power control parameters; and
transmit, to the UE, configuration information indicating a same set of operation parameters for antenna panels of the UE in the set of antenna panels.