Configuring sidelink transmission configuration indicator states
In some implementations, a user equipment (UE) may transmit, to a second UE, sidelink configuration information indicating one or more transmission configuration indicator (TCI) states for at least one sidelink channel between the first UE and the second UE.
1. A first user equipment (UE) for wireless communication, comprising:
one or more memories; and
one or more processors, coupled to the one or more memories, configured to:
transmit, to a second UE, sidelink configuration information indicating one or more transmission configuration indicator (TCI) states for at least one sidelink channel between the first UE and the second UE, wherein a TCI state, of the one or more TCI states, defines sidelink quasi co-location (QCL) information that identifies a sender of a QCL reference signal, and wherein the sidelink QCL information that identifies the sender of the QCL reference signal includes at least one of:
at least a portion of an identifier associated with the first UE, or
data indicating whether the QCL reference signal is for reception or transmission; and
communicate, using the indicated one or more TCI states, the QCL reference signal with the second UE.
2. The first UE of claim 1 , wherein the at least one sidelink channel is a physical sidelink control channel.
3. The first UE of claim 1 , wherein the at least one sidelink channel is a physical sidelink shared channel.
4. The first UE of claim 1 , wherein the at least one sidelink channel is a physical sidelink feedback channel.
5. The first UE of claim 1 , wherein the sidelink configuration information indicates a plurality of TCI states for a plurality of sidelink channels between the first UE and the second UE.
6. The first UE of claim 1 , wherein a TCI state, of the one or more TCI states, defines:
a serving cell index,
a bandwidth part identifier,
a type of the QCL reference signal, and
a QCL type.
7. The first UE of claim 1 , wherein the one or more processors, to transmit the sidelink configuration information, are configured to:
transmit the sidelink configuration information via radio resource control signaling.
8. The first UE of claim 1 , wherein the one or more processors, to communicate the QCL reference signal with the second UE, are configured to:
receive the QCL reference signal from the second UE, or
transmit the QCL reference signal to the second UE.
9. A first user equipment (UE) for wireless communication, comprising:
one or more memories; and
one or more processors, coupled to the one or more memories, configured to:
receive, from a second UE, sidelink configuration information indicating one or more transmission configuration indicator (TCI) states for at least one sidelink channel between the first UE and the second UE, wherein a TCI state, of the one or more TCI states, defines sidelink quasi co-location (QCL) information that identifies a sender of a QCL reference signal, and wherein the sidelink QCL information that identifies the sender of the QCL reference signal includes at least one of:
at least a portion of an identifier associated with the second UE, or
data indicating whether the QCL reference signal is for reception or transmission; and
communicate, using the indicated one or more TCI states, the QCL reference signal with the second UE.
10. The first UE of claim 9 , wherein the at least one sidelink channel is a physical sidelink control channel.
11. The first UE of claim 9 , wherein the at least one sidelink channel is a physical sidelink shared channel.
12. The first UE of claim 9 , wherein the at least one sidelink channel is a physical sidelink feedback channel.
13. The first UE of claim 9 , wherein the sidelink configuration information indicates a plurality of TCI states for a plurality of sidelink channels between the first UE and the second UE.
14. The first UE of claim 9 , wherein a TCI state, of the one or more TCI states, defines:
a serving cell index,
a bandwidth part identifier,
a type of the QCL reference signal, and
a QCL type.
15. The first UE of claim 9 , wherein the one or more processors, to receive the sidelink configuration information, are configured to:
receive the sidelink configuration information via radio resource control signaling.
16. The first UE of claim 9 , wherein the one or more processors are further configured to:
select, based at least in part on the one or more TCI states, at least one beam for sidelink communications with the second UE.
17. The first UE of claim 9 , wherein the one or more processors, to communicate the QCL reference signal with the second UE, are configured to:
receive the QCL reference signal from the second UE, or
transmit the QCL reference signal to the second UE.
18. A method of wireless communication performed by a first user equipment (UE), comprising:
transmitting, to a second UE, sidelink configuration information indicating one or more transmission configuration indicator (TCI) states for at least one sidelink channel between the first UE and the second UE, wherein a TCI state, of the one or more TCI states, defines sidelink quasi co-location (QCL) information that identifies a sender of a QCL reference signal, and wherein the sidelink QCL information that identifies the sender of the QCL reference signal includes at least one of:
at least a portion of an identifier associated with the first UE, or
data indicating whether the QCL reference signal is for reception or transmission; and
communicating, using the indicated one or more TCI states, the QCL reference signal with the second UE.
19. The method of claim 18 , wherein the at least one sidelink channel is one of:
a physical sidelink control channel,
a physical sidelink shared channel, or
a physical sidelink feedback channel.
20. The method of claim 18 , wherein the sidelink configuration information indicates a plurality of TCI states for a plurality of sidelink channels between the first UE and the second UE.
21. The method of claim 18 , wherein a TCI state, of the one or more TCI states, defines:
a serving cell index,
a bandwidth part identifier,
a type of the QCL reference signal, and
a QCL type.
22. The method of claim 18 , wherein transmitting the sidelink configuration information comprises:
transmitting the sidelink configuration information via radio resource control signaling.
23. The method of claim 18 , wherein communicating the QCL reference signal with the second UE comprises:
receiving the QCL reference signal from the second UE, or
transmitting the QCL reference signal to the second UE.
24. A method of wireless communication performed by a first user equipment (UE), comprising:
receiving, from a second UE, sidelink configuration information indicating one or more transmission configuration indicator (TCI) states for at least one sidelink channel between the first UE and the second UE, wherein a TCI state, of the one or more TCI states, defines sidelink quasi co-location (QCL) information that identifies a sender of a QCL reference signal, and wherein the sidelink QCL information that identifies the sender of the QCL reference signal includes at least one of:
at least a portion of an identifier associated with the second UE, or
data indicating whether the QCL reference signal is for reception or transmission; and
communicating, using the indicated one or more TCI states, the QCL reference signal with the second UE.
25. The method of claim 24 , wherein the at least one sidelink channel is one of:
a physical sidelink control channel,
a physical sidelink shared channel, or
a physical sidelink feedback channel.
26. The method of claim 24 , wherein the sidelink configuration information indicates a plurality of TCI states for a plurality of sidelink channels between the first UE and the second UE.
27. The method of claim 24 , wherein a TCI state, of the one or more TCI states, defines:
a serving cell index,
a bandwidth part identifier,
a type of the QCL reference signal, and
a QCL type.
28. The method of claim 24 , wherein receiving the sidelink configuration information comprises:
receiving the sidelink configuration information via radio resource control signaling.
29. The method of claim 24 , further comprising:
selecting, based at least in part on the one or more TCI states, at least one beam for sidelink communications with the second UE.
30. The method of claim 24 , wherein communicating the QCL reference signal with the second UE comprises:
receiving the QCL reference signal from the second UE, or
transmitting the QCL reference signal to the second UE.