PLMN Registration Request for Disaster Network Reselection
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Solution Overview
Problem
Existing 5G communication systems face challenges in efficiently supporting network reselection during disasters, as they fail to effectively receive status information from affected networks and enable wireless devices to access alternative networks, leading to service disruptions.
Innovation Solution
Enhanced mechanisms are implemented to allow a first Public Land Mobile Network (PLMN) to receive status information from a second PLMN and enable wireless devices to access the first PLMN during disasters, including the exchange of disaster information and the determination of allowed service parameters, enabling seamless network reselection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing 5G communication systems operate without enhanced disaster mechanisms, then network operation is simple, but network resilience and service continuity deteriorate during disasters
Solution Approach 1:
The system performs preliminary actions by establishing registration request monitoring and status information exchange mechanisms before disasters occur. The first PLMN is pre-configured to receive status information from the second PLMN, and wireless devices are pre-configured with alternative network access capabilities, ensuring immediate response when disasters strike without requiring complex real-time decision-making
Solution Approach 2:
The patent introduces an intermediary status information exchange mechanism between the first PLMN and second PLMN. This intermediary system facilitates communication and coordination during disasters, allowing the first PLMN to receive critical status information from the second PLMN and enable wireless devices to seamlessly access alternative networks without direct complex interactions between affected systems
2Reliability
If the system enables network reselection during disasters, then service continuity is maintained, but information exchange complexity increases
Solution Approach 1:
The patent extracts and separates the status information exchange function from the core network operations. By dedicating specific mechanisms for status information reception and processing, the system maintains service continuity while preventing information loss. The extraction of this function allows focused optimization of information exchange protocols between PLMNs during disaster scenarios
3Ease of operation
If wireless devices are enabled to access alternative networks, then connectivity is maintained during disasters, but network access management complexity increases
Solution Approach 1:
Wireless devices are empowered with self-service capabilities to automatically detect disaster conditions, select alternative networks, and establish connections without complex manual intervention. The devices autonomously process status information and execute network reselection based on pre-configured parameters, maintaining ease of operation while reducing the burden on network access management systems
Data Source
AI summary
A wireless device receives from a base station of a first public land mobile network (PLMN) an indication of a failure of a second PLMN including a PLMN identifier of the second PLMN. The wireless device sends to an access and mobility management function, a registration request indicating the failure of the second PLMN. The registration request includes the PLMN identifier of the second PLMN, and one or more of a subscriber concealed identifier and a permanent equipment identifier of the wireless device.