Techniques for providing assistance information for reduced MIMO layers

An apparatus for wireless communication at a user equipment (UE), comprising:

• one or more processors;
• memory coupled with the one or more processors;
• and
• instructions stored in the memory and executable by the one or more processors to cause the apparatus to:
• receive, from a base station, a configuration for reporting assistance information based at least in part on a capability of the UE;
• transmit, to the base station, assistance information associated with a quantity of uplink multiple-input multiple-output layers based at least in part on the UE satisfying a first predetermined trigger threshold, wherein the UE satisfying the first predetermined trigger threshold comprises at least an uplink block error rate being above a threshold block error rate, or an amount of data in a buffer at the UE being less than a threshold amount of data, or any combination thereof;
• and
• receive, from the base station, control signaling indicating a re-configuration of the quantity of uplink multiple-input multiple-output layers based at least in part on the transmitted assistance information.

An apparatus for wireless communication at a user equipment (UE), comprising:

• means for receiving, from a base station, a configuration for reporting assistance information based at least in part on a capability of the UE;
• means for transmitting, to the base station, assistance information associated with a quantity of uplink multiple-input multiple-output layers based at least in part on the UE satisfying a first predetermined trigger threshold, wherein the UE satisfying the first predetermined trigger threshold comprises at least an uplink block error rate being above a threshold block error rate, or an amount of data in a buffer at the UE being less than a threshold amount of data, or any combination thereof;
• and
• means for receiving, from the base station, control signaling indicating a re-configuration of the quantity of uplink multiple-input multiple-output layers based at least in part on the transmitted assistance information.

A non-transitory computer-readable medium storing code for wireless communication at a user equipment (UE), the code comprising instructions executable by one or more processors to:

• receive, from a base station, a configuration for reporting assistance information based at least in part on a capability of the UE;
• transmit, to the base station, assistance information associated with a quantity of uplink multiple-input multiple-output layers based at least in part on the UE satisfying a first predetermined trigger threshold, wherein the UE satisfying the first predetermined trigger threshold comprises at least an uplink block error rate being above a threshold block error rate, or an amount of data in a buffer at the UE being less than a threshold amount of data, or any combination thereof;
• and
• receive, from the base station, control signaling indicating a re-configuration of the quantity of uplink multiple-input multiple-output layers based at least in part on the transmitted assistance information.