Multiple antennas and interruption time values for sounding reference signal (SRS) switching

An apparatus for wireless communication, comprising:

• a processor;
• and
• memory coupled with the processor, wherein the memory includes instructions executable by the processor to cause a user equipment (UE) to:
• identify a capability of the UE to transmit on a first carrier of a carrier aggregation (CA) configuration and a second carrier of the CA configuration, wherein the capability comprises a retuning time of the UE for switching between carriers;
• transmit, from the UE to a base station, an indication of the retuning time of the UE, and an indication of whether the retuning time impacts a downlink reception capability of the UE;
• determine whether a collision could occur in a subframe between a communication on the first carrier and a sounding reference signal (SRS) on the second carrier based at least in part on the retuning time of the UE;
• and
• transmit the communication on the first carrier or the SRS on the second carrier, or both, during the subframe based at least in part on the retuning time of the UE.