Techniques for determining beams for beamforming wireless communications
Aspects described herein relate to configuring, at a device, default beam information for determining a beam for data channel communications. The device can determine to use the default beam information for configuring the beam for a data channel communication based on determining explicit beam information is not configured. In addition, the device can transmit, based on determining to use the default beam information, the data channel communication based on the beam configured using the default beam information.
1. An apparatus for wireless communication, comprising:
a transceiver;
a memory configured to store instructions; and
one or more processors communicatively coupled with the memory and the transceiver, wherein the one or more processors are configured to:
receive, from a user equipment (UE) and over a first component carrier (CC), a beam failure recovery request (BFRQ) signal indicating beam failure at the UE on a beam failure CC of multiple CCs established with the UE, wherein the beam failure CC is different than the first CC; and
transmit, to the UE, based on the BFRQ signal, and for the beam failure CC, a recovery beam.
2. The apparatus of claim 1 , wherein the BFRQ signal indicates the beam failure CC based on resources selected for the BFRQ signal.
3. The apparatus of claim 1 , wherein the BFRQ signal indicates a CC index or a CC group index associated with the beam failure CC.
4. The apparatus of claim 1 , wherein the BFRQ signal indicates one or more beam strength parameters for selecting the recovery beam, and wherein the one or more processors are further configured to select the recovery beam based on the one or more beam strength parameters.
5. The apparatus of claim 1 , wherein the one or more processors are further configured to configure the UE for carrier aggregation using the multiple CCs including at least the first CC that is configured to support a beam failure recovery process and a second CC that is not configured to support the beam failure recovery process, wherein the beam failure CC is the second CC.
6. The apparatus of claim 5 , wherein the first CC corresponds to a first network node and the second CC corresponds to a second network node.
7. The apparatus of claim 5 , wherein the one or more processors are configured to transmit the recovery beam over the first CC.
8. The apparatus of claim 1 , wherein the one or more processors are configured to receive the BFRQ signal over an uplink control channel resource.
9. A method for wireless communication at a network node, comprising:
receiving, from a user equipment (UE) and over a first component carrier (CC), a beam failure recovery request (BFRQ) signal indicating beam failure at the UE on a beam failure CC of multiple CCs established with the UE, wherein the beam failure CC is different than the first CC; and
transmitting, to the UE, based on the BFRQ signal, and for the beam failure CC, a recovery beam.
10. The method of claim 9 , wherein the BFRQ signal indicates the beam failure CC based on resources selected for the BFRQ signal.
11. The method of claim 9 , wherein the BFRQ signal indicates a CC index or a CC group index associated with the beam failure CC.
12. The method of claim 9 , wherein the BFRQ signal indicates one or more beam strength parameters for selecting the recovery beam, and further comprising selecting the recovery beam based on the one or more beam strength parameters.
13. The method of claim 9 , further comprising configuring the UE for carrier aggregation using the multiple CCs including at least the first CC that is configured to support a beam failure recovery process and a second CC that is not configured to support the beam failure recovery process, wherein the beam failure CC is the second CC.
14. The method of claim 13 , wherein the first CC corresponds to a first network node and the second CC corresponds to a second network node.
15. The method of claim 13 , wherein transmitting the recovery beam is over the first CC.
16. The method of claim 9 , wherein receiving the BFRQ signal is over an uplink control channel resource.
17. A non-transitory computer-readable medium, comprising code executable by one or more processors for wireless communications at a network node, the code comprising code for:
receiving, from a user equipment (UE) and over a first component carrier (CC), a beam failure recovery request (BFRQ) signal indicating beam failure at the UE on a beam failure CC of multiple CCs established with the UE, wherein the beam failure CC is different than the first CC; and
transmitting, to the UE, based on the BFRQ signal, and for the beam failure CC, a recovery beam.
18. The non-transitory computer-readable medium of claim 17 , wherein the BFRQ signal indicates the beam failure CC based on resources selected for the BFRQ signal.
19. The non-transitory computer-readable medium of claim 17 , wherein the BFRQ signal indicates a CC index or a CC group index associated with the beam failure CC.
20. The non-transitory computer-readable medium of claim 17 , wherein the BFRQ signal indicates one or more beam strength parameters for selecting the recovery beam, and further comprising code for selecting the recovery beam based on the one or more beam strength parameters.