PLMN Priority Switching for Faster Disaster Roaming Recovery
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Solution Overview
Problem
Existing wireless network systems fail to efficiently switch to higher priority Public Land Mobile Networks (PLMNs) during disaster situations, leading to prolonged service interruptions for users.
Innovation Solution
A method and device for UE to detect disaster roaming service registration, prioritize PLMN selection based on availability and signal quality, and initiate a predefined timer to periodically search for available higher priority or non-forbidden PLMNs to minimize service disruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the UE continuously monitors and searches for higher priority PLMNs during disaster roaming, then the service switch speed is improved, but the power consumption and processing load increase
Solution Approach 1:
The patent implements periodic monitoring of higher priority PLMNs using a timer mechanism. The UE periodically checks for available higher priority PLMNs rather than continuously monitoring, which reduces power consumption while still enabling timely service switches when network conditions change.
Solution Approach 2:
The patent performs preliminary actions by detecting disaster roaming service registration status and pre-configuring the UE to monitor for higher priority PLMNs. This preparation enables faster response when suitable networks become available, improving service switch speed without requiring continuous high-intensity monitoring.
2Reliability
If the UE implements comprehensive PLMN selection with multiple criteria (priority, availability, signal quality), then the service reliability is improved, but the device complexity increases
Solution Approach 1:
The patent segments the PLMN selection process into distinct functional modules: disaster roaming service detection module, higher priority PLMN monitoring module, and service execution module. Each module handles a specific aspect of the selection process, making the overall system more manageable and less complex while maintaining comprehensive selection criteria.
Solution Approach 2:
The patent implements dynamic PLMN selection where the UE adapts its behavior based on detected conditions. The system dynamically adjusts which PLMNs to monitor and when to initiate service switches, allowing flexible response to changing network conditions without requiring rigid complex configuration.
3Loss of time
If the UE performs frequent PLMN scanning and registration attempts, then the service interruption time is reduced, but the network load and signaling overhead increase
Solution Approach 1:
The patent uses periodic scanning with timer-based control to balance service interruption time and signaling overhead. The UE scans for higher priority PLMNs at regulated intervals rather than continuously attempting registration, reducing unnecessary signaling while still achieving quick service restoration when networks become available.
Solution Approach 2:
The patent enables the UE to autonomously detect disaster roaming conditions and self-manage the PLMN selection process without extensive network coordination. This self-service approach reduces signaling overhead by allowing the UE to make local decisions about when and where to switch services based on available information.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Embodiments herein provide higher priority PLMN selection method during disaster situation in a wireless network (1000) by MS (100). In an embodiment, when MS (100) is registered for the disaster roaming service, the method includes selecting a higher priority PLMN in a priority order when the higher priority PLMN is available in the network and other non-forbidden PLMN when the higher priority PLMN is unavailable in the network, and registering the MS to receive the service in the network on one of the selected higher priority PLMN, and the selected other non-forbidden PLMN. In another embodiment, when the MS is not registered for the disaster roaming service, the method includes selecting a higher priority PLMN in a priority order when the higher priority PLMN is available in network, and registering the MS on the selected higher priority PLMN to receive the service in network.