System and method for beam switching and reporting
Methods, apparatuses, and computer-readable mediums associated with a user equipment (UE) and a base station are provided for herein. In aspects, a UE may receive, from a base station, a beam modification command indicating at least one beam index for communicating through at least one beam on at least one channel. In an aspect, each beam index of the at least one beam index may indicate at least a direction for communicating through a corresponding beam of the at least one beam. The UE may communicate, with the base station, through the at least one beam corresponding to the at least one beam index on the at least one channel.
1. A method of wireless communication by a base station, the method comprising:
transmitting, to a user equipment (UE), a beam modification command indicating at least one beam index for communicating through at least one beam on at least one channel and indicating the at least one channel corresponding to the at least one beam, each beam index of the at least one beam index indicating at least a direction for communicating through a corresponding beam of the at least one beam, wherein the beam modification command is transmitted on a control channel and the at least one channel comprises a downlink data channel; and
communicating, with the UE, through the at least one beam corresponding to the at least one beam index on the at least one channel.
2. The method of claim 1 , further comprising:
communicating, with the UE, through a serving beam corresponding to a serving beam index; and
switching, after transmitting the beam modification command, from the serving beam to the at least one beam corresponding to the at least one beam index indicated by the beam modification command.
3. The method of claim 2 , wherein the switching from the serving beam to the at least one beam is performed at a predetermined time.
4. The method of claim 3 , wherein the predetermined time is associated with at least one of a symbol or subframe, and wherein the beam modification command indicates the at least one of the symbol or the subframe.
5. The method of claim 1 , wherein the at least one beam index comprises a plurality of beam indexes, and the at least one channel comprises a plurality of channels.
6. The method of claim 1 , further comprising:
receiving, from the UE, at least one beam state information (BSI) report including information indicating at least one quality corresponding to the at least one beam; and
determining the at least one beam index indicated in the beam modification command based on the information included in the BSI report.
7. The method of claim 6 , wherein the information indicating the at least one quality corresponding to the at least one beam comprises at least one of a reference signal received power (RSRP), a reference signal received quality (RSRQ), a signal-to-noise ratio (SNR), or a reference signal strength indicator (RSSI).
8. The method of claim 1 , wherein the beam modification command is transmitted in a medium access control (MAC) control element (CE).
9. The method of claim 8 , wherein the beam modification command indicates the at least one channel based on a DCI format of the DCI message.
10. The method of claim 1 , wherein the beam modification command is transmitted in a downlink control information (DCI) message.
11. The method of claim 1 , wherein the beam modification command is transmitted via radio resource control (RRC) signaling.
12. An apparatus for wireless communication by a base station, the apparatus comprising:
a memory; and
at least one processor coupled to the memory and configured to:
transmit, to a user equipment (UE), a beam modification command indicating at least one beam index for communicating through at least one beam on at least one channel and indicating the at least one channel corresponding to the at least one beam, each beam index of the at least one beam index indicating at least a direction for communicating through a corresponding beam of the at least one beam, wherein the beam modification command is transmitted on a control channel and the at least one channel comprises a downlink data channel; and
communicate, with the UE, through the at least one beam corresponding to the at least one beam index on the at least one channel.
13. The apparatus of claim 12 , wherein the at least one processor is further configured to:
communicate, with the UE, through a serving beam corresponding to a serving beam index; and
switch, after transmission of the beam modification command, from the serving beam to the at least one beam corresponding to the at least one beam index indicated by the beam modification command.
14. The apparatus of claim 13 , wherein the switch from the serving beam to the at least one beam is performed at a predetermined time.
15. The apparatus of claim 14 , wherein the predetermined time is associated with at least one of a symbol or subframe, and wherein the beam modification command indicates the at least one of the symbol or the subframe.
16. The apparatus of claim 12 , wherein the at least one beam index comprises a plurality of beam indexes, and the at least one channel comprises a plurality of channels.
17. The apparatus of claim 12 , wherein the at least one processor is further configured to:
receive, from the UE, at least one beam state information (BSI) report including information indicating at least one quality corresponding to the at least one beam; and
determine the at least one beam index indicated in the beam modification command based on the information included in the BSI report.
18. The apparatus of claim 17 , wherein the information indicating the at least one quality corresponding to the at least one beam comprises at least one of a reference signal received power (RSRP), a reference signal received quality (RSRQ), a signal-to-noise ratio (SNR), or a reference signal strength indicator (RSSI).
19. The apparatus of claim 12 , wherein the beam modification command is transmitted in a medium access control (MAC) control element (CE).
20. The apparatus of claim 12 , wherein the beam modification command is transmitted in a downlink control information (DCI) message.
21. The apparatus of claim 20 , wherein the beam modification command indicates the at least one channel based on a DCI format of the DCI message.
22. The apparatus of claim 12 , wherein the beam modification command is transmitted via radio resource control (RRC) signaling.
23. An apparatus for wireless communication by a base station, the apparatus comprising:
means for transmitting, to a user equipment (UE), a beam modification command indicating at least one beam index for communicating through at least one beam on at least one channel and indicating the at least one channel corresponding to the at least one beam, each beam index of the at least one beam index indicating at least a direction for communicating through a corresponding beam of the at least one beam, wherein the beam modification command is transmitted on a control channel and the at least one channel comprises a downlink data channel; and
means for communicating, with the UE, through the at least one beam corresponding to the at least one beam index on the at least one channel.
24. The apparatus of claim 23 , further comprising:
means for communicating, with the UE, through a serving beam corresponding to a serving beam index; and
means for switching, after transmitting the beam modification command, from the serving beam to the at least one beam corresponding to the at least one beam index indicated by the beam modification command.
25. The apparatus of claim 23 , wherein the at least one beam index comprises a plurality of beam indexes, and the at least one channel comprises a plurality of channels.
26. The apparatus of claim 23 , further comprising:
receiving, from the UE, at least one beam state information (BSI) report including information indicating at least one quality corresponding to the at least one beam; and
determining the at least one beam index indicated in the beam modification command based on the information included in the BSI report.
27. The apparatus of claim 26 , wherein the information indicating the at least one quality corresponding to the at least one beam comprises at least one of a reference signal received power (RSRP), a reference signal received quality (RSRQ), a signal-to-noise ratio (SNR), or a reference signal strength indicator (RSSI).
28. The apparatus of claim 23 , wherein the beam modification command is transmitted in a downlink control information (DCI) message.
29. The apparatus of claim 28 , wherein the beam modification command indicates the at least one channel based on a DCI format of the DCI message.
30. A non-transitory computer-readable medium storing computer-executable code for wireless communication by a base station, comprising code to:
transmit, to a user equipment (UE), a beam modification command indicating at least one beam index for communicating through at least one beam on at least one channel and indicating the at least one channel corresponding to the at least one beam, each beam index of the at least one beam index indicating at least a direction for communicating through a corresponding beam of the at least one beam, wherein the beam modification command is transmitted on a control channel and the at least one channel comprises a downlink data channel; and
communicate, with the UE, through the at least one beam corresponding to the at least one beam index on the at least one channel.