Edison ChenFollow


A user equipment (UE) employs a Universal Integrated Circuit Card (UICC) suspend algorithm when the UE is in an out-of-service (OOS) condition. When a modem of the UE exits an OOS sleep mode and enters an active mode (sometimes referred to as “waking up”) for network signal scanning, the UE modem also sends a polling message (e.g., a status report) to one or more UICC Subscriber Identity Modules (SIMs) of the UE. In some cases, the UE modem also negotiates a polling interval with the one or more SIMs. By synchronizing the sending of the polling message with the exiting of sleep mode for network signal scanning, the UE reduces the overall number of times the sleep mode is exited. The UE thereby increases the time spent in the sleep mode, and thus conserves more power while in the OOS condition.

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This work is licensed under a Creative Commons Attribution 4.0 License.