Roaming Steering With Secure SOR Delivery and UICC Updates

The patent applies preliminary action by updating persistent information on UICC before the UE performs PLMN selection. The network provides SOR data including a list of preferred PLMNs and access technologies, which are stored in persistent memory on the UICC in advance. This ensures that when the UE needs to select a network, the updated information is already available, preventing data integrity issues and ensuring accurate network steering.

The patent applies dynamics by enabling the UE to perform PLMN searches while in connected mode, transitioning from a static restriction to a dynamic capability. The system allows the UE to initiate PLMN searches and receive SOR data during connected mode operations, eliminating the requirement to switch to idle mode for network selection. This reduces time loss and enables timely network selection without disrupting ongoing communications.

The patent applies feedback by implementing an automated system that provides SOR data to the UE based on network conditions and user preferences. The network monitors UE behavior and automatically updates the preferred PLMN list, feeding this information back to the UE for storage on UICC. This eliminates the need for continuous manual network selection by users, reducing battery consumption while maintaining accurate network selection through automated feedback loops.