Operation in a switched uplink mode

1. A user equipment (UE) for wireless communication, comprising:

a memory; and

one or more processors, operatively coupled to the memory, configured to:

receive, from a base station, configuration information associated with a switched uplink (SUL) mode in a network including the base station;

transmit, based at least in part on the configuration information indicating that the SUL mode is supported in the network, a tracking update to receive a query associated with capabilities of the UE;

transmit information identifying one or more SUL band pairs supported by the UE when the configuration information indicates that the SUL mode is supported in the network; and

transmit a coherence capability indication indicating a capability of the UE to perform coherent uplink multiple-input multiple-output transmission in a frequency band associated with the one or more SUL band pairs.

2. The UE of claim 1 , wherein the configuration information indicates that the base station has configured the UE to operate in the SUL mode.

3. The UE of claim 1 , wherein the tracking update is a tracking area update.

4. The UE of claim 1 , wherein the one or more processors are further configured to:

receive the query associated with capabilities of the UE; and

transmit an updated coherence capability indication to update a previous coherence capability indication,

wherein the previous coherence capability indication indicates that the UE is to perform coherent uplink multiple-input multiple-output (MIMO) transmission in a frequency band, and

wherein the updated coherence capability indication indicates that the UE is not to perform coherent uplink MIMO transmission in the frequency band.

5. The UE of claim 1 , wherein the one or more processors are further configured to:

receive a dynamic indication from the base station to begin operating in the SUL mode.

6. The UE of claim 1 , wherein the one or more processors are further configured to:

perform coherent uplink multiple-input multiple-output transmission, while operating in the SUL mode, over a physical uplink shared channel.

7. The UE of claim 1 , wherein the one or more processors are further configured to:

determine, based at least in part on a transmit precoding matrix indicator, whether the base station is expecting the UE to perform coherent uplink multiple-input multiple-output transmission in a frequency band associated with the SUL mode.

8. The UE of claim 1 , wherein the one or more processors are further configured to:

communicate, when operating in the SUL mode, utilizing an SUL band pair including a first frequency band and a second frequency band, the communicating including performing coherent uplink multiple-input multiple-output transmission in the second frequency band.

9. A method of wireless communication performed by a user equipment (UE), comprising:

receiving, from a base station, configuration information associated with a switched uplink (SUL) mode in a network including the base station;

transmitting, based at least in part on the configuration information indicating that the SUL mode is supported in the network, a tracking update to receive a query associated with capabilities of the UE;

transmitting information identifying one or more SUL band pairs supported by the UE when the configuration information indicates that the SUL mode is supported in the network; and

transmitting a coherence capability indication indicating a capability of the UE to perform coherent uplink multiple-input multiple-output transmission in a frequency band associated with the one or more SUL band pairs.

10. The method of claim 9 , wherein the configuration information indicates that the base station has configured the UE to operate in the SUL mode.

11. The method of claim 9 , further comprising:

receiving the query associated with capabilities of the UE; and

transmitting an updated coherence capability indication to update a previous coherence capability indication,

wherein the previous coherence capability indication indicates that the UE is to perform coherent uplink multiple-input multiple-output (MIMO) transmission in a frequency band, and

wherein the updated coherence capability indication indicates that the UE is not to perform coherent uplink MIMO transmission in the frequency band.

12. The method of claim 9 , further comprising:

receiving a dynamic indication from the base station to begin operating in the SUL mode.

13. The method of claim 9 , further comprising:

performing coherent uplink multiple-input multiple-output transmission, while operating in the SUL mode, over a physical uplink shared channel.

14. The method of claim 9 , further comprising:

determining, based at least in part on a transmit precoding matrix indicator, whether the base station is expecting the UE to perform coherent uplink multiple-input multiple-output transmission in a frequency band associated with the SUL mode.

15. The method of claim 9 , further comprising:

communicating, when operating in the SUL mode, utilizing an SUL band pair including a first frequency band and a second frequency band, the communicating including performing coherent uplink multiple-input multiple-output transmission in the second frequency band.