System and method for beam switching and reporting
A UE may receive, from a base station, a message requesting BSI. The UE may determine a number N of BSI reports to send to the base station, and each BSI report may indicate a beam index corresponding to a beam and a received power associated with the beam. The UE may send, to the base station, N BSI reports based on the message requesting BSI. The UE may receive, from the base station, a set of signals through a set of beams, and determine the received power for each signal of the set of signals received through each beam of the set of beams, each received power may be associated with a beam of the set of beams.
1. A method of wireless communication by a base station, the method comprising:
determining a number N greater than zero of beam state information (BSI) reports;
sending, to a user equipment (UE), a message requesting BSI, wherein the message indicates the determined number N of BSI reports requested from the UE;
sending, to the UE, a set of signals through a set of beams; and
receiving, from the UE, N BSI reports based on the indicated number N of BSI reports, wherein each of the N BSI reports indicates at least one beam index corresponding to at least one beam of the set of beams and at least one received power associated with the at least one beam.
2. The method of claim 1 , wherein the message further indicates a set of time and frequency resources on which the N BSI reports are to be carried, and wherein the N BSI reports are received on the indicated set of time and frequency resources.
3. The method of claim 1 , wherein the message further indicates a channel on which the N BSI reports are to be carried, and wherein the number N of BSI reports is indicated based on the channel on which the N BSI reports are to be carried.
4. The method of claim 1 , wherein the N BSI reports include N received powers corresponding to a set of highest received powers, and wherein each of the set of highest received powers is associated with a respective beam of the at least one beam.
5. The method of claim 1 , further comprising:
determining a set of candidate beams for communication with the UE based on the N BSI reports.
6. The method of claim 1 , further comprising:
switching from beam used for communication with the UE to one of the at least one beam based on the N BSI reports.
7. The method of claim 6 , wherein the one of the at least one beam is associated with a highest received power indicated in the N BSI reports.
8. The method of claim 1 , wherein the number N of BSI reports is indicated based on a type of the message.
9. The method of claim 8 , wherein the type of the message comprises at least one of a downlink control information (DCI) message or a random access response (RAR) message.
10. The method of claim 9 , wherein the message indicates that the number N of BSI reports is greater than one based on the type of the message comprising the RAR message.
11. An apparatus for wireless communication by a base station, the apparatus comprising:
means for determining a number N greater than zero of beam state information (BSI) reports;
means for sending, to a user equipment (UE), a message requesting BSI, wherein the message indicates the number N of BSI reports requested from the UE;
means for sending, to the UE, a set of signals through a set of beams; and
means for receiving, from the UE, N BSI reports based on the indicated number N of BSI reports, each of the N BSI reports indicating at least one beam index corresponding to at least one beam of the set of beams and a received power associated with the at least one beam.
12. The apparatus of claim 11 , wherein the message further indicates a set of time and frequency resources on which the N BSI reports are to be carried, and wherein the N BSI reports are received on the indicated set of time and frequency resources.
13. The apparatus of claim 11 , wherein the message further indicates a channel on which the N BSI reports are to be carried, and wherein the number N of BSI reports is indicated based on the channel on which the N BSI reports are to be carried.
14. The apparatus of claim 11 , wherein the N BSI reports include N received powers corresponding to a set of highest received powers, and wherein each of the set of highest received powers is associated with a respective beam of the at least one beam.
15. The apparatus of claim 11 , further comprising:
means for determining a set of candidate beams for communication with the UE based on the N BSI reports.
16. The apparatus of claim 11 , further comprising:
means for switching from a beam used for communication with the UE to one of the at least one beam based on the N BSI reports.
17. The apparatus of claim 16 , wherein the one of the at least one beam is associated with a highest received power indicated in the N BSI reports.
18. The apparatus of claim 11 , wherein the number N of BSI reports is indicated based on a type of the message.
19. The apparatus of claim 18 , wherein the type of the message comprises at least one of a downlink control information (DCI) message or a random access response (RAR) message.
20. The apparatus of claim 19 , wherein the message indicates that the number N of BSI reports is greater than one based on the type of the message comprising the RAR message.
21. 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:
determine a number N greater than zero of beam state information (BSI) reports;
send, to a user equipment (UE), a message requesting BSI, wherein the message indicates the number N greater than or equal to zero of BSI reports requested from the UE;
send, to the UE, a set of signals through a set of beams; and
receive, from the UE, N BSI reports based on the indicated number N of BSI reports, each of the N BSI reports indicating at least one beam index corresponding to at least one beam of the set of beams and a received power associated with the at least one beam.
22. The apparatus of claim 21 , wherein the message further indicates a set of time and frequency resources on which the N BSI reports are to be carried, and wherein the N BSI reports are received on the indicated set of time and frequency resources.
23. The apparatus of claim 21 , wherein the message further indicates a channel on which the N BSI reports are to be carried, and wherein the number N of BSI reports is indicated based on the channel on which the N BSI reports are to be carried.
24. The apparatus of claim 21 , wherein the N BSI reports include N received powers corresponding to a set of highest received powers, and wherein each of the set of highest received powers is associated with a respective beam of the at least one beam.
25. The apparatus of claim 21 , wherein the at least one processor is further configured to:
determine a set of candidate beams for communication with the UE based on the N BSI reports.
26. The apparatus of claim 25 , wherein the at least one processor is further configured to:
switch from a beam used for communication with the UE to one of the at least one beam based on the N BSI reports.
27. The apparatus of claim 26 , wherein the one of the at least one beam is associated with a highest received power indicated in the N BSI reports.
28. The apparatus of claim 21 , wherein the number N of BSI reports is indicated based on a type of the message.
29. The apparatus of claim 28 , wherein the type of the message comprises at least one of a downlink control information (DCI) message or a random access response (RAR) message.
30. The apparatus of claim 29 , wherein the message indicates that the number N of BSI reports is greater than one based on the type of the message comprising the RAR message.
31. A non-transitory computer-readable medium storing computer-executable code for wireless communication by a base station, the code when executed by at least one processor cause the at least one processor to:
determine a number N greater than zero of beam state information (BSI) reports;
send, to a user equipment (UE), a message requesting BSI, wherein the message indicates the number N greater than or equal to zero of BSI reports requested from the UE;
send, to the UE, a set of signals through a set of beams; and
receive, from the UE, N BSI reports based on the indicated number N of BSI reports, each of the N BSI reports indicating at least one beam index corresponding to at least one beam of the set of beams and a received power associated with the at least one beam.