Dynamic trigger algorithm for antenna switch diversity

1. A method for triggering an antenna switch, comprising:

identifying a settling time, the settling time comprising an estimated delay in reception attributable to settling following the antenna switch;

determining a delay for the antenna switch that results in a fewest number of durations of a Physical Downlink Control Channel (PDCCH) overlapping with the identified settling time;

delaying the antenna switch based at least in part on the determined delay; and

decoding a PDCCH of a current sub-frame or a PDCCH of a following sub-frame based at least in part on delaying the antenna switch.

2. The method of claim 1 , wherein the identified settling time is less than a remaining time of the current sub-frame after decoding the PDCCH of the current sub-frame.

3. The method of claim 2 , wherein decoding the PDCCH of the current sub-frame or the PDCCH of the following sub-frame comprises retrieving downlink control information (DCI), the method further comprising:

determining whether a Physical Downlink Shared Channel (PDSCH) is scheduled in the current sub-frame based at least in part on the retrieved DCI.

4. The method of claim 3 , further comprising:

upon determining that the PDSCH is scheduled in the current sub-frame, delaying the antenna switch until one or more sub-frames following the current sub-frame.

5. The method of claim 3 , further comprising:

upon determining that the PDSCH is absent in the current sub-frame, switching the antenna during the current sub-frame.

6. The method of claim 1 , wherein the identified settling time is greater than a remaining time of the current sub-frame after decoding the PDCCH of the current sub-frame.

7. The method of claim 6 , further comprising:

identifying a duration of the PDCCH of the current sub-frame; and

switching the antenna following the identified duration of the PDCCH of the current sub-frame.

8. The method of claim 1 , wherein the identified settling time is greater than a duration of the current sub-frame.

9. The method of claim 8 , wherein decoding the PDCCH of the current sub-frame or the PDCCH of the following sub-frame comprises retrieving downlink control information (DCI), the method further comprising:

determining whether a Physical Downlink Shared Channel (PDSCH) is scheduled in the current sub-frame based at least in part on the retrieved DCI.

10. The method of claim 9 , further comprising:

upon determining that the PDSCH is scheduled in the current sub-frame, delaying the antenna switch until one or more sub-frames following the current sub-frame.

11. The method of claim 9 , further comprising:

upon determining that the PDSCH is absent in the current sub-frame, switching the antenna during the current sub-frame.

12. The method of claim 1 , wherein the settling time comprises:

a time for a hardware switch to settle; or

a time for one or more receiver loops to settle on channel conditions following the antenna switch.

13. An apparatus for triggering an antenna switch, comprising:

a processor;

memory in electronic communication with the processor; and

instructions stored in the memory, the instructions being executable by the processor to:

identify a settling time, the settling time comprising an estimated delay in reception attributable to settling following the antenna switch;

determine a delay for the antenna switch that results in a fewest number of durations of a Physical Downlink Control Channel (PDCCH) overlapping with the identified settling time;

delay the antenna switch based at least in part on the determined delay; and

decode a PDCCH of a current sub-frame or a PDCCH of a following sub-frame based at least in part on delaying the antenna switch.

14. The apparatus of claim 13 , wherein the identified settling time is less than a remaining time of the current sub-frame after decoding the PDCCH of the current sub-frame.

15. The apparatus of claim 14 , wherein decoding the PDCCH of the current sub-frame or the PDCCH of the following sub-frame comprises retrieving downlink control information (DCI), the instructions further executable by the processor to:

determine whether a Physical Downlink Shared Channel (PDSCH) is scheduled in the current sub-frame based at least in part on the retrieved DCI.

16. The apparatus of claim 15 , wherein the instructions are further executable by the processor to:

upon determining that the PDSCH is scheduled in the current sub-frame, delay the antenna switch until one or more sub-frames following the current sub-frame.

17. The apparatus of claim 15 , wherein the instructions are further executable by the processor to:

upon determining that the PDSCH is absent in the current sub-frame, switch the antenna during the current sub-frame.

18. The apparatus of claim 13 , wherein the identified settling time is greater than a remaining time of the current sub-frame after decoding the PDCCH of the current sub-frame.

19. The apparatus of claim 18 , wherein the instructions are further executable by the processor to:

identify a duration of the PDCCH of the current sub-frame; and

switch the antenna following the identified duration of the PDCCH.

20. The apparatus of claim 13 , further comprising:

at least one switch operably connected to the processor;

at least one antenna operably connected to the at least one switch;

at least one receive chain operably connected to the at least one switch; and

at least one transmit chain operably connected to the at least one switch.

21. The apparatus of claim 13 , wherein the identified settling time is greater than a duration of the current sub-frame.

22. The apparatus of claim 21 , wherein decoding the PDCCH of the current sub-frame or the PDCCH of the following sub-frame comprises retrieving downlink control information (DCI), the instructions further executable by the processor to:

determine whether a Physical Downlink Shared Channel (PDSCH) is scheduled in the current sub-frame based at least in part on the retrieved DCI.

23. The apparatus of claim 22 , wherein the instructions are further executable by the processor to:

upon determining that the PDSCH is scheduled in the current sub-frame, delay the antenna switch until one or more sub-frames following the current sub-frame.

24. The apparatus of claim 22 , wherein the instructions are further executable by the processor to:

upon determining that the PDSCH is absent in the current sub-frame, switching the antenna during the current sub-frame.

25. The apparatus of claim 13 , wherein the settling time comprises:

a time for a hardware switch to settle; or

a time for one or more receiver loops to settle on channel conditions following the antenna switch.

26. An apparatus for triggering an antenna switch, comprising:

means for identifying a settling time, the settling time comprising an estimated delay in reception attributable to settling following the antenna switch;

means for determining a delay for the antenna switch that results in a fewest number of durations of a Physical Downlink Control Channel (PDCCH) overlapping with the identified settling time;

means for delaying the antenna switch based at least in part on the determined delay; and

means for decoding a PDCCH of a current sub-frame or a PDCCH of a following sub-frame based at least in part on delaying the antenna switch.

27. A computer program product for triggering an antenna switch, the computer program product comprising a non-transitory computer-readable medium storing instructions executable by a processor to:

identify a settling time, the settling time comprising an estimated delay in reception attributable to settling following the antenna switch;

determine a delay for the antenna switch that results in a fewest number of durations of a Physical Downlink Control Channel (PDCCH) overlapping with the identified settling time;

delay the antenna switch based at least in part on the determined delay; and

decode a PDCCH of a current sub-frame or a PDCCH of a following sub-frame based at least in part on delaying the antenna switch.