Signaling for detected synchronization signal blocks

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

receiving, at a plurality of radio frequency (RF) bands, one or more synchronization signal (SS) blocks from a base station, each of the one or more SS blocks being received at a respective RF band, wherein the one or more SS blocks comprise a first SS sequence or a second SS sequence;

identifying, concurrent with or after receiving the one or more SS blocks, a request from the base station to transmit an indication of the respective RF band of a preferred SS block of the one or more SS blocks based at least in part on a determination that the one or more SS blocks comprise the first SS sequence or the second SS sequence;

determining, in response to the request, the preferred SS block of the one or more SS blocks based at least in part on a signal strength of the one or more SS blocks; and

transmitting, to the base station, the indication of the respective RF band of the preferred SS block based at least in part on the request.

2. The method of claim 1 , further comprising:

identifying, within the request, signaling parameters comprising one or more of a format, resources, or timing for transmitting the indication; and

transmitting the indication in accordance with the identified signaling parameters.

3. The method of claim 1 , wherein the request is received via a physical broadcast channel (PBCH).

4. The method of claim 1 , wherein determining the preferred SS block comprises:

determining a signal-to-noise ratio (SNR) or a received signal power associated with each of the received one or more SS blocks; and

the method further comprising determining the preferred SS block as an SS block having a highest SNR of the determined SNRs or as an SS block having a highest received signal power of the determined received signal powers.

5. The method of claim 1 , further comprising:

determining to transmit the respective RF band based at least in part on an SS sequence of the received one or more SS blocks.

6. The method of claim 1 , wherein transmitting the indication of the respective RF band comprises:

determining a timing to transmit signaling responsive to receipt of the one or more SS blocks, wherein the timing is indicative of the respective RF band; and

transmitting the signaling in accordance with the determined timing.

7. The method of claim 1 , wherein transmitting the indication of the respective RF band comprises:

transmitting, via a random access channel (RACH) message, an index of the respective RF band.

8. The method of claim 1 , wherein transmitting the indication of the respective RF band comprises:

indicating, to the base station, a physical resource block (PRB) corresponding to the preferred SS block.

9. The method of claim 1 , further comprising:

determining to transmit the respective RF band based at least in part on receiving two or more SS blocks.

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

transmitting one or more synchronization signal (SS) blocks, each of the one or more SS blocks being transmitted at a respective radio frequency (RF) band, the one or more SS blocks comprising a first SS sequence or a second SS sequence;

transmitting to one or more user equipments (UEs), concurrent with or after transmitting the one or more SS blocks, a request to signal an indication of the respective RF band of a preferred SS block, wherein the first SS sequence or the second SS sequence included in the one or more SS blocks was indicative that the base station was to make the request; and

receiving, from a UE of the one or more UEs in response to the request, the indication of the respective RF band of the preferred SS block of the UE.

11. The method of claim 10 , further comprising:

determining signaling parameters comprising one or more of a format, resources, or timing for transmission of the indication by the one or more UEs, wherein transmitting the request comprises:

transmitting the determined signaling parameters within the request to the one or more UEs.

12. The method of claim 10 , wherein the request is transmitted via a physical broadcast channel (PBCH).

13. The method of claim 10 , further comprising:

scheduling resources for communication with the UE based at least in part on the received indication of the respective RF band.

14. The method of claim 10 , further comprising:

monitoring resources for communication with the UE based at least in part on the received indication of the respective RF band.

15. The method of claim 10 , wherein receiving the indication of the respective RF band comprises:

receiving, via a random access channel (RACH) message, an index of the respective RF band.

16. The method of claim 10 , wherein receiving the indication of the respective RF band comprises:

receiving information indicative of a physical resource block (PRB) corresponding to at least one SS block.

17. An apparatus for wireless communication, comprising:

a processor;

memory coupled with the processor; and

instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:

receive, at a plurality of radio frequency (RF) bands, one or more synchronization signal (SS) blocks from a base station, each of the one or more SS blocks being received at a respective RF band, wherein the one or more SS blocks comprise a first SS sequence or a second SS sequence;

identify, concurrent or after receiving the one or more SS blocks, a request from the base station to transmit an indication of the respective RF band of a preferred SS block of the one or more SS blocks based at least in part on a determination that the one or more SS blocks comprise the first SS sequence or the second SS sequence;

determine, in response to the request, the preferred SS block of the one or more SS blocks based at least in part on a signal strength of the one or more SS blocks; and

transmit, to the base station, the indication of the respective RF band of the preferred SS block based at least in part on the request.

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

identify, within the request, signaling parameters comprising one or more of a format, resources, or timing for transmitting the indication; and

transmit the indication in accordance with the identified signaling parameters.

19. The apparatus of claim 17 , wherein the request is received via a physical broadcast channel (PBCH).

20. The apparatus of claim 17 , wherein the instructions executable by the processor to cause the apparatus to determine the preferred SS block comprise instructions executable by the processor to cause the apparatus to:

determine a signal-to-noise ratio (SNR) or a received signal power associated with each of the received one or more SS blocks; and

determine the preferred SS block as an SS block having a highest SNR of the determined SNRs or as an SS block having a highest received signal power of the determined received signal powers.

21. The apparatus of claim 17 , wherein the instructions executable by the processor to cause the apparatus to transmit the indication of the respective RF band comprise instructions executable by the processor to cause the apparatus to:

determine a timing to transmit signaling responsive to receipt of the one or more SS blocks, wherein the timing is indicative of the respective RF band; and

transmit the signaling in accordance with the determined timing.

22. An apparatus for wireless communication, comprising:

a processor;

memory coupled with the processor; and

instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to:

transmit one or more synchronization signal (SS) blocks, each of the one or more SS blocks being transmitted at a respective radio frequency (RF) band, the one or more SS blocks comprising a first SS sequence or a second SS sequence;

transmit to one or more user equipments (UEs), concurrent with or after transmission of the one or more SS blocks, a request to signal an indication of the respective RF band of a preferred SS block, wherein the first SS sequence or the second SS sequence included in the one or more SS blocks was indicative that the apparatus was to make the request; and

receive, from a UE of the one or more UEs in response to the request, the indication of the respective RF band of the preferred SS block of the UE.

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

determine signaling parameters comprising one or more of a format, resources, or timing for transmission of the indication by the one or more UEs, wherein the instructions executable by the processor to cause the apparatus to transmit the request comprise instructions executable by the processor to cause the apparatus to:

transmit the determined signaling parameters within the request to the one or more UEs.

24. The apparatus of claim 22 , wherein the request is transmitted via a physical broadcast channel (PBCH).

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

schedule resources for communication with the UE based at least in part on the received indication of the respective RF band.

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

monitor resources for communication with the UE based at least in part on the received indication of the respective RF band.