UE Disaster Roaming Exit via Non-3GPP Normal Service Detection
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Solution Overview
Problem
Existing wireless networks fail to effectively manage the deregistration of user equipment (UE) for disaster roaming services, leading to continued and costly usage by UEs on forbidden PLMNs, impacting both the home PLMN and the UE's home PLMN, due to malicious non-indication of disaster condition resolution by the forbidden PLMN.
Innovation Solution
The UE and the network entities (HPLMN, VPLMN, FPLMN) implement a method and controller to detect disaster conditions, trigger registration and deregistration procedures on 3GPP and non-3GPP access to switch from disaster roaming to normal service, ensuring timely deregistration and preventing abnormal charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE continues to use disaster roaming service on forbidden PLMN, then service availability is maintained, but abnormal charging and network costs increase
Solution Approach 1:
The system implements feedback mechanisms where the UE monitors for disaster condition indications from the network. When the disaster condition is resolved (indicated by network signaling), the UE automatically triggers deregistration from the disaster roaming service and returns to normal service. This feedback loop prevents continued abnormal charging while ensuring service availability is maintained through appropriate service selection.
2Loss of energy
If the UE automatically deregisters from disaster roaming service, then abnormal charging is prevented, but service continuity may be interrupted
Solution Approach 1:
The system performs preliminary actions by having the UE continuously monitor for disaster condition resolution indications before actual deregistration is needed. When the network signals that the disaster condition has ended, the UE is already prepared to immediately switch back to normal service, minimizing any potential service interruption time while ensuring abnormal charging is prevented.
3Ease of operation
If the forbidden PLMN does not indicate disaster condition resolution, then network control is maintained, but UE cannot switch back to normal service
Solution Approach 1:
The patent introduces an intermediary mechanism where the UE autonomously detects and responds to disaster condition resolution through network signaling. The UE acts as an intermediary that translates network indicators into automatic service switching actions, enabling the UE to switch back to normal service without requiring direct intervention or explicit indication from the forbidden PLMN, thus maintaining network control while restoring service switching capability.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Embodiments herein disclose a method for handling a deregistration procedure of a UE (100) for a disaster roaming service in a wireless network (1000) by the UE (100). The method includes detecting a disaster condition in the wireless network (1000). Further, the method includes triggering a registration procedure with a forbidden PLMN (FPLMN) on a 3GPP access to receive the disaster roaming service in the wireless network (1000) and get registered for the disaster roaming service with the FPLMN (300). Further, the method includes detecting a signal on a non-3GPP access to receive a normal service. Further, the method includes triggering a deregistration procedure with the FPLMN (300) on the 3GPP access to stop receiving the disaster roaming service from the FPLMN (300) in response to detecting the signal on the non-3GPP access to receive the normal service.