Single transmitter switching for dual connectivity

A method comprising for wireless communication at a base station, comprising:

• identifying a carrier aggregation configuration comprising a primary cell and one or more secondary cells, a first frame structure configuration for the primary cell being different from a second frame structure configuration for a secondary cell of the one or more secondary cells;
• determining a feedback timing for the secondary cell based at least in part on the first frame structure configuration for the primary cell and the second frame structure configuration for the secondary cell;
• transmitting, to a user equipment (UE), a downlink communication on the secondary cell;
• and
• receiving, in response to the transmitted downlink communication, feedback from the UE according to the determined feedback timing.

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

• a processor,
• memory in electronic communication with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• identify, for a carrier aggregation configuration comprising a primary cell and one or more secondary cells, a first frame structure configuration for the primary cell and a second frame structure configuration for a secondary cell of the one or more secondary cells;
• receive, from a base station, a downlink communication on the secondary cell;
• determine a feedback timing for the secondary cell based at least in part on the first frame structure configuration for the primary cell and the second frame structure configuration for the secondary cell;
• and
• transmit, in response to the received downlink communication, feedback to the base station according to the determined feedback timing.

An apparatus for wireless communication at a base station, comprising:

• a processor,
• memory in electronic communication with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• identify a carrier aggregation configuration comprising a primary cell and one or more secondary cells, a first frame structure configuration for the primary cell being different from a second frame structure configuration for a secondary cell of the one or more secondary cells;
• determine a feedback timing for the secondary cell based at least in part on the first frame structure configuration for the primary cell and the second frame structure configuration for the secondary cell;
• transmit, to a user equipment (UE), a downlink communication on the secondary cell;
• and
• receive, in response to the transmitted downlink communication, feedback from the UE according to the determined feedback timing.