System and method for beam switching and reporting
A UE may receive a beam modification command that indicates a set of transmit beam indexes corresponding to a set of transmit beams of a base station, and each transmit beam index of the set of transmit beam indexes may indicate at least a transmit direction for transmitting a transmit beam by the base station. The UE may determine a set of receive beam indexes corresponding to receive beams of the UE based on the set of transmit beam indexes, and each receive beam index of the set of receive beam indexes may indicate at least a receive direction for receiving a receive beam by the UE. The UE may receive, from the base station, a signal through at least one receive beam corresponding to at least one receive beam index included in the set of receive beam indexes.
1. A method of wireless communication for a user equipment (UE), the method comprising:
receiving a beam modification command that indicates a set of transmit beam indexes corresponding to a set of transmit beams associated with a base station and indicates a first set of symbol indexes corresponding to a first set of symbols of a reference signal, each transmit beam index of the set of transmit beam indexes indicating at least a transmit direction for transmitting a transmit beam by the base station, the beam modification command being received via at least one of downlink control information (DCI), radio resource control (RRC) signaling, or medium access control (MAC) control element (CE); and
receiving, based on the beam modification command, the reference signal from the base station using at least one receive beam, wherein a first portion of the reference signal is received in the first set of symbols.
2. The method of claim 1 , wherein the receiving the reference signal using the at least one receive beam comprises:
receiving the first portion of the reference signal in the first set of symbols using a first receive beam of the at least one receive beam; and
receiving the second portion of the reference signal in a second set of symbols using a second receive beam of the at least one receive beam.
3. The method of claim 1 , wherein the beam modification command further indicates a second set of symbol indexes corresponding to a second set of symbols, and at least a second portion of the reference signal is received in the second set of symbols.
4. The method of claim 3 , wherein the beam modification command indicates a first correspondence between a first transmit beam index of the set of transmit beam indexes and the first set of symbol indexes, and the beam modification command indicates a second correspondence between a second transmit beam index of the set of transmit beam indexes and the second set of symbol indexes.
5. The method of claim 1 , further comprising:
identifying the at least one receive beam based on at least one transmit beam index of the set of transmit beam indexes.
6. The method of claim 1 , further comprising:
identifying the at least one receive beam based on the first set of symbol indexes.
7. The method of claim 1 , wherein the reference signal comprises one of a channel-state information reference signal (CSI-RS) or a demodulation reference signal (DM-RS).
8. An apparatus to be included in a user equipment (UE), the apparatus comprising:
means for receiving a beam modification command that indicates a set of transmit beam indexes corresponding to a set of transmit beams associated with a base station and indicates a first set of symbol indexes corresponding to a first set of symbols of a reference signal, each transmit beam index of the set of transmit beam indexes indicating at least a transmit direction for transmitting a transmit beam by the base station, the beam modification command being received via at least one of downlink control information (DCI), radio resource control (RRC) signaling, or medium access control (MAC) control element (CE); and
means for receiving, based on the beam modification command, a reference signal from the base station using at least one receive beam, wherein a first portion of the reference signal is received in the first set of symbols.
9. The apparatus of claim 8 , wherein the means for receiving the reference signal using the at least one receive beam is configured to:
receive the first portion of the reference signal in the first set of symbols using a first receive beam of the at least one receive beam; and
receive a second portion of the reference signal in a second set of symbols using a second receive beam of the at least one receive beam.
10. The apparatus of claim 8 , wherein the beam modification command further indicates a second set of symbol indexes corresponding to a second set of symbols of the reference signal, and at least a second portion of the reference signal is received in a second set of symbols of the reference signal, and at least a second portion of the reference signal is received in the second set of symbols.
11. The apparatus of claim 10 , wherein the beam modification command indicates a first correspondence between a first transmit beam index of the set of transmit beam indexes and the first set of symbol indexes, and the beam modification command indicates a second correspondence between a second transmit beam index of the set of transmit beam indexes and the second set of symbol indexes.
12. The apparatus of claim 8 , further comprising:
means for identifying the at least one receive beam based on at least one transmit beam index of the set of transmit beam indexes.
13. The apparatus of claim 8 , wherein the reference signal comprises one of a channel-state information reference signal (CSI-RS) or a demodulation reference signal (DM-RS).
14. An apparatus to be included in a user equipment (UE), the apparatus comprising:
a memory; and
at least one processor coupled to the memory and configured to:
receive a beam modification command that indicates a set of transmit beam indexes corresponding to a set of transmit beams associated with a base station and indicates a first set of symbol indexes corresponding to a first set of symbols of a reference signal, each transmit beam index of the set of transmit beam indexes indicating at least a transmit direction for transmitting a transmit beam by the base station, the beam modification command being received via at least one of downlink control information (DCI), radio resource control (RRC) signaling, or medium access control (MAC) control element (CE); and
receive, based on the beam modification command, a reference signal from the base station using at least one receive beam, wherein a first portion of the reference signal is received in the first set of symbols.
15. The apparatus of claim 14 , wherein the reception of the reference signal using the at least one receive beam comprises to:
receive the first portion of the reference signal in the first set of symbols using a first receive beam of the at least one receive beam; and
receive a second portion of the reference signal in a second set of symbols using a second receive beam of the at least one receive beam.
16. The apparatus of claim 14 , wherein the beam modification command further indicates a second set of symbol indexes corresponding to a second set of symbols of the reference signal, and at least a second portion of the reference signal is received in the second set of symbols of the reference signal, and at least a second portion of the reference signal is received in the second set of symbols.
17. The apparatus of claim 16 , wherein the beam modification command indicates a first correspondence between a first transmit beam index of the set of transmit beam indexes and the first set of symbol indexes, and the beam modification command indicates a second correspondence between a second transmit beam index of the set of transmit beam indexes and the second set of symbol indexes.
18. The apparatus of claim 14 , wherein the at least one processor is further configured to:
identify the at least one receive beam based on at least one transmit beam index of the set of transmit beam indexes.
19. The apparatus of claim 14 , wherein the reference signal comprises one of a channel-state information reference signal (CSI-RS) or a demodulation reference signal (DM-RS).
20. A non-transitory computer-readable medium storing computer-executable code for wireless communication by a user equipment (UE), comprising code to:
receive a beam modification command that indicates a set of transmit beam indexes corresponding to a set of transmit beams associated with a base station and indicates a first set of symbol indexes corresponding to a first set of symbols of a reference signal, each transmit beam index of the set of transmit beam indexes indicating at least a transmit direction for transmitting a transmit beam by the base station, the beam modification command being received via at least one of downlink control information (DCI), radio resource control (RRC) signaling, or medium access control (MAC) control element (CE); and
receive, based on the beam modification command, a reference signal from the base station using at least one receive beam, wherein a first portion of the reference signal is received in the first set of symbols.