Techniques for performing beamforming based on zones

1 . A method for wireless communications at a first wireless device, comprising:

receiving a first indication of a set of zones to which the first wireless device is configured to relay one or more messages;

receiving a second indication of a set of beams of the first wireless device associated with a corresponding zone of the set of zones, wherein the set of beams is configured to serve the corresponding zone;

relaying communications to the corresponding zone using at least one beam of the set of beams based at least in part on the communications being for the corresponding zone or for a second wireless device located in the corresponding zone; and

determining an updated set of beams associated with the corresponding zone of the set of zones based at least in part on the relaying of the communications to the corresponding zone.

2 . The method of claim 1 , further comprising:

identifying that the second wireless device is in the corresponding zone; and

selecting one of the set of beams for the relaying of the communications to the second wireless device based at least in part on the second wireless device being in the corresponding zone.

3 . The method of claim 2 , wherein identifying that the second wireless device is in the corresponding zone comprises:

receiving a zone identifier of the second wireless device, wherein the zone identifier is associated with the corresponding zone.

4 . The method of claim 3 , wherein receiving the zone identifier comprises:

receiving the zone identifier in downlink control information that is associated with either triggering or configuring training reference signal occasions to one or more UEs in the corresponding zone.

5 . The method of claim 3 , wherein receiving the zone identifier comprises:

receiving the zone identifier in downlink control information that is associated with the second wireless device.

6 . The method of claim 1 , further comprising:

receiving an additional indication of respective zones in which one or more reference signals are to be used for beam training, at least one reference signal of the one or more reference signals associated with the corresponding zone; and

selecting the at least one beam for use in beam training based at least in part on the at least one reference signal being associated with the corresponding zone.

7 . The method of claim 1 , further comprising:

transmitting an additional indication of the updated set of beams to a third wireless device from which the second indication was received.

8 . The method of claim 1 , further comprising:

determining an updated set of beams associated with the second wireless device based at least in part on the relaying of the communications to the second wireless device in the corresponding zone.

9 . The method of claim 8 , further comprising:

transmitting an additional indication to a third wireless device from which the second indication was received, wherein the additional indication associates the updated set of beams with the second wireless device in the corresponding zone.

10 . The method of claim 1 , further comprising:

receiving, from a base station via a Uu link, a message that includes the first indication, the second indication, or both, the message being either a Uu radio resource control message, a Uu medium access control (MAC) control element message, or a Uu downlink control information message.

11 . The method of claim 1 , further comprising:

receiving, from a user equipment (UE) via a sidelink, a message that includes the first indication, the second indication, or both, the message being either a sidelink radio resource control message, a sidelink medium access control (MAC) control element message, a sidelink control information message, or a sidelink shared channel message.

12 . The method of claim 1 , wherein the first wireless device is a reconfigurable reflective surface, a low-power user equipment, or a repeater device.

13 . The method of claim 1 , wherein each zone of the set of zones is associated with a corresponding geographic location.

14 . A method for wireless communications at a first wireless device, comprising:

transmitting, to a second wireless device, a first indication of a set of zones to which the second wireless device is configured to relay one or more messages from the first wireless device;

transmitting, to the second wireless device, a second indication of a set of beams of the second wireless device associated with a corresponding zone of the set of zones, wherein the set of beams is configured to serve the corresponding zone; and

receiving an additional indication of an updated set of beams from the second wireless device, wherein the updated set of beams is associated with the corresponding zone of the set of zones based at least in part on relaying by the second wireless device of communications from the first wireless device to the corresponding zone.

15 . The method of claim 14 , further comprising:

transmitting a zone identifier of a third wireless device to which the second wireless device is to relay communications from the first wireless device, wherein the zone identifier is associated with the corresponding zone.

16 . The method of claim 15 , wherein transmitting the zone identifier comprises:

transmitting the zone identifier in downlink control information that is associated with either triggering or configuring training reference signal occasions to one or more UEs in the corresponding zone.

17 . The method of claim 15 , wherein transmitting the zone identifier comprises:

transmitting the zone identifier in downlink control information that is associated with the third wireless device.

18 . The method of claim 14 , further comprising:

receiving an additional indication of an updated set of beams from the second wireless device, wherein the additional indication associates the updated set of beams with a third wireless device in the corresponding zone, wherein the updated set of beams is associated with the third wireless device based at least in part on relaying by the second wireless device of communications from the first wireless device to the third wireless device in the corresponding zone.

19 . The method of claim 14 , further comprising:

transmitting, via a Uu link, a message that includes the first indication, the second indication, or both, the message being either a Uu radio resource control message, a Uu medium access control (MAC) control element message, or a Uu downlink control information message, wherein the first wireless device is a base station.

20 . The method of claim 14 , further comprising:

transmitting, via a sidelink, a message that includes the first indication, the second indication, or both, the message being either a sidelink radio resource control message, a sidelink medium access control (MAC) control element message, a sidelink control information message, or a sidelink shared channel message, wherein the first wireless device is a user equipment (UE).

21 . An apparatus for wireless communications, comprising:

a processor;

memory coupled with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to:

receive a first indication of a set of zones to which a first wireless device is configured to relay one or more messages;

receive a second indication of a set of beams of the first wireless device associated with a corresponding zone of the set of zones, wherein the set of beams is configured to serve the corresponding zone;

relay communications to the corresponding zone using at least one beam of the set of beams based at least in part on the communications being for the corresponding zone or for a second wireless device located in the corresponding zone;

identify one or more spatially correlated beams associated with the at least one beam of the set of beams; and

relay the communications to the second wireless device using the one or more spatially correlated beams and the at least one beam of the set of beams.

22 . The apparatus of claim 21 , wherein the instructions are further executable by the processor to cause the apparatus to:

receive an additional indication that the first wireless device is to serve the corresponding zone.

23 . The apparatus of claim 21 , wherein the communications relayed to the corresponding zone include at least one of a reference signal, an initial access signal, or a synchronization signal block.

24 . An apparatus for wireless communications, comprising:

a processor;

memory coupled with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to:

transmit, to a second wireless device, a first indication of a set of zones to which the second wireless device is configured to relay one or more messages from a first wireless device;

transmit, to the second wireless device, a second indication of a set of beams of the second wireless device associated with a corresponding zone of the set of zones, wherein the set of beams is configured to serve the corresponding zone; and

transmit an additional indication of respective zones in which one or more reference signals are to be used for beam training, at least one reference signal of the one or more reference signals associated with the corresponding zone.

25 . The apparatus of claim 24 , wherein the instructions are further executable by the processor to cause the apparatus to:

transmit an additional indication that the second wireless device is to serve the corresponding zone.

26 . The apparatus of claim 25 , wherein the instructions are further executable by the processor to cause the apparatus to:

transmit, for relay by the second wireless device to the corresponding zone, at least one of a reference signal, an initial access signal, or a synchronization signal block.