Decoding broadcast channel signaling using multiple beams
Methods, systems, and devices for wireless communication are described. A user equipment (UE) may measure a signal strength for each beam of a set of multiple beams. The UE may select, from the set of multiple beams, a set of two or more beams each having a respective signal strength satisfying a threshold. The UE may attempt to decode a first broadcast channel signal of a first beam of the set of two or more beams in a single broadcast channel period. The UE may decode, after failing to decode the first broadcast channel signal of the first beam, a second broadcast channel signal of a second beam of the set of two or more beams in the single broadcast channel period.
1. A user equipment (UE), comprising:
a processing system that includes processor circuitry and memory circuitry that stores code, the processing system configured to cause the UE to:
measure a signal strength for each beam of a plurality of beams;
select, from the plurality of beams, a set of two or more beams each having a respective signal strength satisfying a threshold;
attempt to decode a first broadcast channel signal of a first beam of the set of two or more beams in a single broadcast channel period; and
decode, after failing to decode the first broadcast channel signal of the first beam and based at least in part on a second broadcast channel signal being received temporally after the first broadcast channel signal, the second broadcast channel signal of a second beam of the set of two or more beams in the single broadcast channel period.
2. The UE of claim 1 , wherein, to decode the second broadcast channel signal, the processing system is configured to cause the UE to decode the second broadcast channel signal in accordance with a composite log-likelihood ratio for a plurality of broadcast channel signals including the second broadcast channel signal and including one or more previous broadcast channel signals received in the single broadcast channel period including the first broadcast channel signal.
3. The UE of claim 1 , wherein the processing system is configured to cause the UE to receive a control signal indicating a quantity of beams in the set of two or more beams, wherein decoding the second broadcast channel signal is in accordance with the indication of the quantity of beams.
4. The UE of claim 1 , wherein each beam of the set of two or more beams is associated with a respective signal strength measurement that is within a threshold difference from a highest signal strength measurement for a strongest beam of the set of two or more beams.
5. The UE of claim 4 , wherein the processing system is configured to cause the UE to receive a control signal indicating the threshold difference, wherein decoding the first broadcast channel signal and the second broadcast channel signal is in accordance with the indication of the threshold difference.
6. The UE of claim 1 , wherein the processing system is configured to cause the UE to:
monitor for the first broadcast channel signal during a paging occasion associated with the plurality of beams, wherein the first broadcast channel signal is a first paging signal; and
monitor for the second broadcast channel signal during the paging occasion associated with the plurality of beams, wherein the second broadcast channel signal is a second paging signal.
7. The UE of claim 1 , wherein the first broadcast channel signal is a first system information block, and the second broadcast channel signal is a second system information block.
8. The UE of claim 1 , wherein the processing system is configured to cause the UE to store a log-likelihood ratio for the first broadcast channel signal in association with the attempt to decode the first broadcast channel signal, wherein decoding the second broadcast channel signal is based at least in part on the log-likelihood ratio for the first broadcast channel signal.
9. The UE of claim 1 , wherein the first broadcast channel signal and the second broadcast channel signal each include a signal comprising same information that is communicated via the first beam and the second beam, respectively.
10. The UE of claim 1 , wherein the plurality of beams are configured for Frequency Range 2.
11. A method for wireless communication by a user equipment (UE), comprising:
measuring a signal strength for each beam of a plurality of beams;
selecting, from the plurality of beams, a set of two or more beams each having a respective signal strength satisfying a threshold;
attempting to decode a first broadcast channel signal of a first beam of the set of two or more beams in a single broadcast channel period; and
decoding, after failing to decode the first broadcast channel signal of the first beam and based at least in part on a second broadcast channel signal being received temporally after the first broadcast channel signal, the second broadcast channel signal of a second beam of the set of two or more beams in the single broadcast channel period.
12. The method of claim 11 , wherein decoding the second broadcast channel signal comprises decoding the second broadcast channel signal in accordance with a composite log-likelihood ratio for a plurality of broadcast channel signals including the second broadcast channel signal and including one or more previous broadcast channel signals received in the single broadcast channel period including the first broadcast channel signal.
13. The method of claim 11 , further comprising receiving a control signal indicating a quantity of beams in the set of two or more beams, wherein decoding the second broadcast channel signal is in accordance with the indication of the quantity of beams.
14. The method of claim 11 , wherein each beam of the set of two or more beams is associated with a respective signal strength measurement that is within a threshold difference from a highest signal strength measurement for a strongest beam of the set of two or more beams.
15. The method of claim 14 , further comprising receiving a control signal indicating the threshold difference, wherein decoding the first broadcast channel signal and the second broadcast channel signal is in accordance with the indication of the threshold difference.
16. The method of claim 11 , further comprising:
monitoring for the first broadcast channel signal during a paging occasion associated with the plurality of beams, wherein the first broadcast channel signal is a first paging signal; and
monitoring for the second broadcast channel signal during the paging occasion associated with the plurality of beams, wherein the second broadcast channel signal is a second paging signal.
17. The method of claim 11 , wherein the first broadcast channel signal is a first system information block, and the second broadcast channel signal is a second system information block.
18. The method of claim 11 , further comprising storing a log-likelihood ratio for the first broadcast channel signal in association with the attempt to decode the first broadcast channel signal, wherein decoding the second broadcast channel signal is based at least in part on the log-likelihood ratio for the first broadcast channel signal.
19. The method of claim 11 , wherein the first broadcast channel signal and the second broadcast channel signal each include a signal comprising same information that is communicated via the first beam and the second beam, respectively.
20. The method of claim 11 , wherein the plurality of beams are configured for Frequency Range 2.