Multi-SIM RRC State Reporting for Predictable UE Transitions

The patent applies parameter changes by introducing specific RRC state parameters (firstRRC-State, secondRRC-State) to control the behavior of different USIM applications during state transitions. This standardizes the state management parameters across multi-USIM devices, ensuring predictable network functionality while maintaining flexibility in supporting multiple subscriptions.

The patent applies preliminary action by pre-configuring the first RRC state and second RRC state parameters in advance during the state transition from RRC_INACTIVE to RRC_CONNECTED. This allows the UE to maintain consistent behavior across different implementations while enabling efficient state transitions, as the state management is prepared beforehand rather than handled ad-hoc.

The patent applies partial action by selectively canceling the PHR trigger only under specific conditions (when firstRRC-State is RRC_IDLE and secondRRC-State is RRC_INACTIVE, or vice versa). This prevents unnecessary PHR transmissions that would increase signaling overhead, while still maintaining accurate power headroom reporting when needed, thus optimizing the balance between measurement precision and signaling quantity.