Managing beam selection for a multi-subscription wireless device

1. A method performed by a processor of a multi-subscription wireless device for managing beam selection, comprising:

determining a rotation angle between an orientation of a first beam of a first subscription and an orientation of a second beam of the first subscription;

applying the rotation angle to a first beam of a second subscription to identify a second beam of the second subscription; and

performing a tune-away operation comprising tuning a radio frequency (RF) resource of the multi-subscription wireless device to the second subscription and configuring spatial filter parameters of an antenna array to communicate via the identified second beam of the second subscription.

2. The method of claim 1 , wherein determining the rotation angle between the orientation of the first beam of the first subscription and the orientation of the second beam of the first subscription comprises determining the rotation angle between the orientation of the first beam of the first subscription and the orientation of the second beam of the first subscription in response to the first subscription changing from the first beam to the second beam.

3. The method of claim 1 , further comprising determining whether a serving cell or serving synchronization signal block (SSB) has changed for the first subscription,

wherein determining the rotation angle between the orientation of the first beam of the first subscription and the orientation of the second beam of the first subscription comprises determining the rotation angle between the orientation of the first beam of the first subscription and the orientation of the second beam of the first subscription in response to determining that the serving cell or serving SSB has not changed for the first subscription.

4. The method of claim 3 , further comprising, in response to determining that the serving cell or serving SSB has changed for the first subscription:

determining an angular difference between a previous serving cell for the first subscription and a currently serving cell for the first subscription, or between a previous SSB for the first subscription and a current SSB for the first subscription; and

adjusting the rotation angle between the orientation of the first beam of the first subscription and the orientation of the second beam using the determined angular difference between the cells or SSBs.

5. The method of claim 1 , wherein applying the rotation angle to the first beam of the second subscription to identify the second beam of the second subscription comprises:

applying the rotation angle to a codebook comprising correlations between spatial coordinates of beams of the first subscription to orientations for beams of the second subscription; and

identifying the second beam of the second subscription based in part on a correlation obtained of the determined difference in rotation angle and the second beam of the second subscription.

6. The method of claim 1 , further comprising performing beam refinement operations for the second beam of the second subscription during the tune-away operation.

7. The method of claim 1 , performing the tune-away operation comprising tuning a radio frequency (RF) resource of the multi-subscription wireless device to the second subscription and configuring spatial filter parameters of the antenna array to communicate via the identified second beam of the second subscription comprises:

determining whether the second beam of the second subscription is expected to experience interference meeting a threshold interference; and

configuring spatial filter parameters of the antenna array to communicate via the identified second beam of the second subscription in response to determining that the second beam of the second subscription is not expected to experience interference meeting a threshold interference.

8. The method of claim 7 , further comprising:

performing measurements of neighbor beams of the second beam of the second subscription in response to determining that the second beam of the second subscription is expected to experience interference meeting a threshold interference; and

configuring spatial filter parameters of the antenna array to receive a neighbor beam from among the neighbor beams of the second beam of the second subscription having a relatively highest signal strength.

9. The method of claim 1 , further comprising:

initializing a beam sweep timer after beginning the tune-away operation;

determining whether the beam sweep timer has elapsed;

performing measurements of neighbor beams of the second beam of the second subscription in response to determining that the beam sweep timer has elapsed; and

configuring spatial filter parameters of the antenna array to receive a neighbor beam from among the neighbor beams of the second beam of the second subscription having a relatively highest signal strength.

10. The method of claim 1 , further comprising:

determining whether a page decode failure has occurred on the second beam of the second subscription;

performing measurements of neighbor beams of the second beam of the second subscription in response to determining that the page decode failure has occurred on the second beam of the second subscription; and

configuring spatial filter parameters of the antenna array to receive a neighbor beam from among the neighbor beams of the second beam of the second subscription having a relatively highest signal strength.

11. The method of claim 1 , further comprising:

determining whether a signal strength of the second beam of the second subscription meets a threshold signal strength;

configuring the spatial filter parameters of the antenna array to communicate via the identified second beam of the second subscription in response to determining that the signal strength of the second beam of the second subscription meets the threshold signal strength; and

configuring the spatial filter parameters of the antenna array to receive a parent beam of the second beam of the second subscription in response to determining that the signal strength of the second beam of the second subscription does not meet the threshold signal strength.

12. A multi-subscription wireless device, comprising:

a processor configured with processor executable instructions to:

determine a rotation angle between an orientation of a first beam of a first subscription and an orientation of a second beam of the first subscription;

apply the rotation angle to a first beam of a second subscription to identify a second beam of the second subscription; and

perform a tune-away operation comprising tuning a radio frequency (RF) resource of the multi-subscription wireless device to the second subscription and configuring spatial filter parameters of an antenna array to communicate via the identified second beam of the second subscription.

13. The multi-subscription wireless device of claim 12 , wherein the processor is further configured with processor executable instructions to determine the rotation angle between the orientation of the first beam of the first subscription and the orientation of the second beam of the first subscription in response to the first subscription changing from the first beam to the second beam.

14. The multi-subscription wireless device of claim 12 , wherein the processor is further configured with processor executable instructions to:

determine whether a serving cell or serving synchronization signal block (SSB) has changed for the first subscription; and

determine the rotation angle between the orientation of the first beam of the first subscription and the orientation of the second beam of the first subscription in response to determining that the serving cell or serving SSB has not changed for the first subscription.

15. The multi-subscription wireless device of claim 14 , wherein the processor is further configured with processor executable instructions to:

determine an angular difference between a previous serving cell for the first subscription and a currently serving cell for the first subscription, or between a previous SSB for the first subscription and a current SSB for the first subscription in response to determining that the serving cell or serving SSB has changed for the first subscription; and

adjust the rotation angle between the orientation of the first beam of the first subscription and the orientation of the second beam using the determined angular difference between the cells or SSBs.

16. The multi-subscription wireless device of claim 12 , wherein the processor is further configured with processor executable instructions to:

apply the rotation angle to a codebook comprising correlations between spatial coordinates of beams of the first subscription to orientations for beams of the second subscription; and

identify the second beam of the second subscription based in part on a correlation obtained of the determined difference in rotation angle and the second beam of the second subscription.

17. The multi-subscription wireless device of claim 12 , wherein the processor is further configured with processor executable instructions to perform beam refinement operations for the second beam of the second subscription during the tune-away operation.

18. The multi-subscription wireless device of claim 12 , wherein the processor is further configured with processor executable instructions to:

determine whether the second beam of the second subscription is expected to experience interference meeting a threshold interference; and

configure spatial filter parameters of the antenna array to communicate via the identified second beam of the second subscription in response to determining that the second beam of the second subscription is not expected to experience interference meeting a threshold interference.

19. The multi-subscription wireless device of claim 18 , wherein the processor is further configured with processor executable instructions to:

perform measurements of neighbor beams of the second beam of the second subscription in response to determining that the second beam of the second subscription is expected to experience interference meeting a threshold interference; and

configure spatial filter parameters of the antenna array to receive a neighbor beam from among the neighbor beams of the second beam of the second subscription having a relatively highest signal strength.

20. The multi-subscription wireless device of claim 12 , wherein the processor is further configured with processor executable instructions to:

initialize a beam sweep timer after beginning the tune-away operation;

determine whether the beam sweep timer has elapsed;

perform measurements of neighbor beams of the second beam of the second subscription in response to determining that the beam sweep timer has elapsed; and

configure spatial filter parameters of the antenna array to receive a neighbor beam from among the neighbor beams of the second beam of the second subscription having a relatively highest signal strength.

21. The multi-subscription wireless device of claim 12 , wherein the processor is further configured with processor executable instructions to:

determine whether a page decode failure has occurred on the second beam of the second subscription;

perform measurements of neighbor beams of the second beam of the second subscription in response to determining that the page decode failure has occurred on the second beam of the second subscription; and

configure spatial filter parameters of the antenna array to receive a neighbor beam from among the neighbor beams of the second beam of the second subscription having a relatively highest signal strength.

22. The multi-subscription wireless device of claim 12 , wherein the processor is further configured with processor executable instructions to:

determine whether a signal strength of the second beam of the second subscription meets a threshold signal strength;

configure the spatial filter parameters of the antenna array to communicate via the identified second beam of the second subscription in response to determining that the signal strength of the second beam of the second subscription meets the threshold signal strength; and

configure the spatial filter parameters of the antenna array to receive a parent beam of the second beam of the second subscription in response to determining that the signal strength of the second beam of the second subscription does not meet the threshold signal strength.

23. A method performed by a processor of a multi-subscription wireless device for managing beam selection, comprising:

receiving simultaneous Transmission Configuration Information (TCI) information that includes a Quasi-Co-Location (QCL) relationship of a first Synchronization Signal Block (SSB) of a first subscription and a second SSB of the first subscription;

applying the QCL relationship to a first SSB of a second subscription to determine a second SSB of the second subscription; and

performing a tune-away operation comprising tuning a radio frequency (RF) resource of the multi-subscription wireless device to the second subscription and configuring spatial filter parameters of an antenna array to receive the second SSB of the second subscription.

24. The method of claim 23 , further comprising:

determining whether the second SSB of the first subscription is activated by a TCI state for the second subscription;

configuring spatial filter parameters of the antenna array to receive the second SSB of the first subscription for use by the second subscription during the tune-away operation in response to determining that the second SSB of the first subscription is activated by a TCI state for the second subscription; and

applying the QCL relationship to the first SSB of the second subscription to determine the second SSB of the second subscription comprises applying the QCL relationship to the first SSB of the second subscription to determine the second SSB of the second subscription in response to determining that the second SSB of the first subscription is not activated by a TCI state for the second subscription.

25. The method of claim 23 , wherein operations of receiving the simultaneous TCI information that includes a QCL relationship of a first SSB of the first subscription and a second SSB of the first subscription, and applying the QCL relationship to a first SSB of the second subscription to determine a second SSB of the second subscription are performed prior to the tune-away operation.

26. The method of claim 23 , wherein:

receiving simultaneous TCI information that includes a QCL relationship of a first SSB of a first subscription and a second SSB of the first subscription comprises receiving simultaneous TCI information for a plurality of component carriers that includes a QCL relationship of a first SSB index of the first subscription and a second SSB index of the first subscription; and

applying the QCL relationship to a first SSB of a second subscription to determine a second SSB of the second subscription comprises applying the QCL relationship to the first SSB of a second subscription to determine the second SSB of the second subscription in response to determining that a current serving component carrier of the second subscription is among the received TCI information for the plurality of component carriers.

27. A multi-subscription wireless device, comprising:

a processor configured with processor executable instructions to:

receive simultaneous Transmission Configuration Information (TCI) information that includes a Quasi-Co-Location (QCL) relationship of a first Synchronization Signal Block (SSB) of a first subscription and a second SSB of the first subscription;

apply the QCL relationship to a first SSB of a second subscription to determine a second SSB of the second subscription; and

perform a tune-away operation comprising tuning a radio frequency (RF) resource of the multi-subscription wireless device to the second subscription and configuring spatial filter parameters of an antenna array to receive the second SSB of the second subscription.

28. The multi-subscription wireless device of claim 27 , wherein the processor is further configured with processor executable instructions to:

determine whether the second SSB of the first subscription is activated by a TCI state for the second subscription;

configure spatial filter parameters of the antenna array to receive the second SSB of the first subscription for use by the second subscription during the tune-away operation in response to determining that the second SSB of the first subscription is activated by a TCI state for the second subscription; and

apply the QCL relationship to the first SSB of the second subscription to determine the second SSB of the second subscription comprises applying the QCL relationship to the first SSB of the second subscription to determine the second SSB of the second subscription in response to determining that the second SSB of the first subscription is not activated by a TCI state for the second subscription.

29. The multi-subscription wireless device of claim 27 , wherein the processor is further configured with processor executable instructions to receive the simultaneous TCI information that includes a QCL relationship of a first SSB of the first subscription and a second SSB of the first subscription, and apply the QCL relationship to a first SSB of the second subscription to determine a second SSB of the second subscription prior to the tune-away operation.

30. The multi-subscription wireless device of claim 27 , wherein the processor is further configured with processor executable instructions to:

receive simultaneous TCI information for a plurality of component carriers that includes a QCL relationship of a first SSB index of the first subscription and a second SSB index of the first subscription; and

apply the QCL relationship to the first SSB of a second subscription to determine the second SSB of the second subscription in response to determining that a current serving component carrier of the second subscription is among the received TCI information for the plurality of component carriers.