UE PLMN Prohibition Lists for Home RAN Priority
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems fail to differentiate between home and visited radio access networks (RANs) when selecting a Public Land Mobile Network (PLMN), leading to potential service quality degradation, higher charges, and loss of control over service policies, especially in overlapping network scenarios.
Innovation Solution
Implement methods and apparatuses to prioritize the home RAN over visited RANs by maintaining a list of 'PLMN not allowed to operate at the present UE location' and managing PLMN registrations, including emergency and normal services, and prioritizing the home RAN based on AS/NAS signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UE selects PLMN based on signal availability without differentiating home and visited RANs, then network coverage is maximized, but service quality deteriorates and operator control is lost
Solution Approach 1:
The patent segments the PLMN selection process by introducing a prohibition list that specifically blocks visited RANs from providing certain services. This segmentation allows the UE to differentiate between home and visited networks, restricting service access on visited RANs while maintaining connectivity. The prohibition list acts as a filter that segments the otherwise unified PLMN selection process into allowed and restricted categories.
Solution Approach 2:
The patent introduces an intermediary mechanism (the prohibition list maintained by the UE) that mediates between the UE's need for network coverage and the operator's need for service quality control. This intermediary structure allows the UE to automatically manage PLMN selection based on predefined restrictions without requiring manual intervention or complex real-time decisions.
2Ease of operation
If the UE connects to visited RAN for service access, then network accessibility is improved, but operator control over service policies is lost and charges increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring the UE with a prohibition list of visited RANs before the UE attempts to connect. This advance preparation allows the UE to automatically reject certain networks without requiring complex real-time policy decisions or operator intervention during service access attempts.
Solution Approach 2:
The UE performs self-service by autonomously managing its own PLMN selection process using the prohibition list. The UE independently determines which networks to access or reject based on the pre-configured restrictions, eliminating the need for complex external policy management systems.
3Productivity
If the system allows UE to access any available PLMN, then service availability is maximized, but service disruptions occur due to inability to prioritize home RAN
Solution Approach 1:
The patent segments the network selection process by creating a prohibition list that specifically identifies visited RANs. This segmentation enables the UE to prioritize home RAN connections while still maintaining the ability to access visited RANs when necessary, thus balancing service availability with service continuity.
Solution Approach 2:
The patent applies preliminary anti-action by pre-establishing restrictions on visited RAN access through the prohibition list. This preliminary blocking prevents potential service disruptions before they occur, while still allowing controlled access when home RAN is unavailable.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The present disclosure provides methods for handling a PLMN list. The method includes determining, by a UE (100), whether the UE (100) is successfully registered to the PLMN stored in the list of “PLMN not allowed to operate at the present UE location” via satellite access network (500) for emergency services or normal services. In an embodiment, the method includes not removing an entry from the list of “PLMN not allowed to operate at a present UE location” at the UE (100) upon determining that the UE (100) is successfully registered for emergency services via satellite access network (500).