Radio access technology searching in dual active mode
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may detect that a first subscription, of a plurality of subscriptions associated with the UE, is associated with an active service on a first cellular network. The UE may search, for a second subscription of the plurality of subscriptions, for radio access technologies (RATs) and frequency bands that are compatible with a dual active mode of the UE. In some aspects, the UE may detect that the active service on the first cellular network has ended. Accordingly, the UE may search, for the second subscription, for RATs and frequency bands that are compatible with the dual active mode of the UE and for RATs and frequency bands that are incompatible with the dual active mode, before expiry of a timer associated with a power saving state. Numerous other aspects are described.
1. An apparatus for wireless communication at a user equipment (UE), comprising:
a memory; and
one or more processors, coupled with the memory, configured to:
detect that a first subscription, of a plurality of subscriptions associated with the UE, is associated with an active service on a first cellular network; and
search, for a second subscription of the plurality of subscriptions, for radio access technologies (RATs) and frequency bands that are compatible with a dual active mode of the UE;
wherein the second subscription is currently associated with a service on a second cellular network that is not compatible with the dual active mode, and wherein the one or more processors are further configured to: enter an out-of-service (OOS) state with the second cellular network or detect radio link failure (RLF) with the second cellular network, wherein the one or more processors search for RATs and frequency bands that are compatible with the dual active mode based at least in part on the OOS state or the RLF.
2. The apparatus of claim 1 , wherein the first subscription is associated with a first subscriber identity module (SIM), and the second subscription is associated with a second SIM.
3. The apparatus of claim 2 , wherein the dual active mode comprises a dual SIM dual active (DSDA) mode.
4. The apparatus of claim 1 , wherein the active service is associated with a priority that satisfies a priority threshold.
5. The apparatus of claim 1 , wherein the one or more processors are further configured to:
connect to a third cellular network that is compatible with the dual active mode using the second subscription.
6. The apparatus of claim 1 , wherein the one or more processors are further configured to:
enter a power saving state using the second subscription based at least in part on not finding a cellular network that is compatible with the dual active mode.
7. The apparatus of claim 6 , wherein the one or more processors are further configured to:
detect that the active service on the first cellular network has ended; and
search, for the second subscription, for RATs and frequency bands that are compatible with the dual active mode of the UE and for RATs and frequency bands that are incompatible with the dual active mode, before expiry of a timer associated with the power saving state.
8. The apparatus of claim 1 , wherein the second subscription is currently associated with a service on a second cellular network that is compatible with the dual active mode, and wherein the one or more processors are further configured to:
enter an out-of-service (OOS) state with the second cellular network or detect radio link failure (RLF) with the second cellular network,
wherein the one or more processors search for RATs and frequency bands that are compatible with the dual active mode based at least in part on the OOS state or the RLF.
9. The apparatus of claim 1 , wherein the active service includes at least one of a voice call or a high-priority gaming service.
10. A method of wireless communication performed by a user equipment (UE), comprising:
detecting that a first subscription, of a plurality of subscriptions associated with the UE, is associated with an active service on a first cellular network; and
searching, for a second subscription of the plurality of subscriptions, for radio access technologies (RATs) and frequency bands that are compatible with a dual active mode of the UE; wherein the second subscription is currently associated with a service on a second cellular network that is not compatible with the dual active mode, and wherein the method further comprises entering an out-of-service (OOS) state with the second cellular network or detecting radio link failure (RLF) with the second cellular network, wherein the searching for RATs and frequency bands that are compatible with the dual active mode is based at least in part on the OOS state or the RLF.
11. The method of claim 10 , wherein the first subscription is associated with a first subscriber identity module (SIM), and the second subscription is associated with a second SIM.
12. The method of claim 11 , wherein the dual active mode comprises a dual SIM dual active (DSDA) mode.
13. The method of claim 10 , wherein the active service is associated with a priority that satisfies a priority threshold.
14. The method of claim 10 , further comprising:
connecting to a third cellular network that is compatible with the dual active mode using the second subscription.
15. The method of claim 10 , further comprising:
entering a power saving state using the second subscription based at least in part on not finding a cellular network that is compatible with the dual active mode.
16. The method of claim 15 , further comprising:
detecting that the active service on the first cellular network has ended; and
searching, for the second subscription, for RATs and frequency bands that are compatible with the dual active mode of the UE and for RATs and frequency bands that are incompatible with the dual active mode, before expiry of a timer associated with the power saving state.
17. The method of any of claim 10 , wherein the second subscription is currently associated with a service on a second cellular network that is compatible with the dual active mode, and wherein the method further comprises:
entering an out-of-service (OOS) state with the second cellular network or detecting radio link failure (RLF) with the second cellular network,
wherein the searching for RATs and frequency bands that are compatible with the dual active mode is based at least in part on the OOS state or the RLF.
18. The method of claim 10 , wherein the active service includes at least one of a voice call or a high-priority gaming service.
19. A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising:
one or more instructions that, when executed by one or more processors of a user equipment (UE), cause the UE to:
detect that a first subscription, of a plurality of subscriptions associated with the UE, is associated with an active service on a first cellular network;
search, for a second subscription of the plurality of subscriptions, for radio access technologies (RATs) and frequency bands that are compatible with a dual active mode of the UE; and
enter an out-of-service (OOS) state with the second cellular network or detect radio link failure (RLF) with the second cellular network, wherein the one or more instructions cause the UE to search for RATs and frequency bands that are compatible with the dual active mode based at least in part on the OOS state or the RLF.
20. The non-transitory computer-readable medium of claim 19 , wherein the first subscription is associated with a first subscriber identity module (SIM), and the second subscription is associated with a second SIM.
21. The non-transitory computer-readable medium of claim 20 , wherein the dual active mode comprises a dual SIM dual active (DSDA) mode.
22. The non-transitory computer-readable medium of claim 19 , wherein the active service is associated with a priority that satisfies a priority threshold.
23. The non-transitory computer-readable medium of claim 19 , wherein the one or more instructions further cause the UE to:
connect to a third cellular network that is compatible with the dual active mode using the second subscription.
24. The non-transitory computer-readable medium of claim 19 , wherein the one or more instructions further cause the UE to:
enter a power saving state using the second subscription based at least in part on not finding a cellular network that is compatible with the dual active mode.
25. The non-transitory computer-readable medium of claim 24 , wherein the one or more instructions further cause the UE to:
detect that the active service on the first cellular network has ended; and
search, for the second subscription, for RATs and frequency bands that are compatible with the dual active mode of the UE and for RATs and frequency bands that are incompatible with the dual active mode, before expiry of a timer associated with the power saving state.
26. The non-transitory computer-readable medium of claim 19 , wherein the second subscription is currently associated with a service on a second cellular network that is compatible with the dual active mode, and wherein the one or more instructions further cause the UE to:
enter an out-of-service (OOS) state with the second cellular network or detect radio link failure (RLF) with the second cellular network,
wherein the one or more instructions cause the UE to search for RATs and frequency bands that are compatible with the dual active mode based at least in part on the OOS state or the RLF.