Forbidden Tracking Area Identity Management in 5G Networks
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Solution Overview
Problem
Current telecommunication networks face challenges in handling forbidden Tracking Area Identities (TAIs) associated with different Public Land Mobile Network-Identifiers (PLMN-IDs), leading to security issues and unnecessary access blocking, as they fail to distinguish and manage TAIs belonging to serving or equivalent PLMNs effectively.
Innovation Solution
A method and User Equipment (UE) are developed to identify and manage TAIs by determining whether they belong to the serving PLMN or equivalent PLMNs, storing only relevant TAIs in memory and ignoring those that do not, thereby preventing unauthorized access and reducing security risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network stores all received forbidden TAI information without distinction, then the network maintains comprehensive tracking area management, but security risks increase and unnecessary access blocking occurs
Solution Approach 1:
The patent segments the forbidden TAI list into two distinct categories: TAIs belonging to the serving PLMN and TAIs belonging to other PLMNs. This segmentation is achieved by comparing the PLMN-ID associated with each TAI against the serving PLMN-ID, allowing the system to apply different handling rules to each segment and avoid unnecessary blocking of legitimate access while maintaining security for actual forbidden areas.
Solution Approach 2:
The patent extracts and separates the TAIs that belong to the serving PLMN from the overall forbidden TAI list received from the network. By extracting only the relevant TAIs (those with matching PLMN-ID) and storing them separately, the system eliminates the harmful effect of treating all TAIs uniformly, thereby preventing false access blocking while maintaining comprehensive security management.
2Device complexity
If the network blocks all TAIs in the forbidden list uniformly, then security management is simplified, but legitimate network access is unnecessarily blocked
Solution Approach 1:
The patent applies local quality by treating TAIs differently based on their PLMN affiliation. Instead of a uniform blocking approach, the system applies selective filtering: TAIs belonging to the serving PLMN are identified and excluded from blocking, while other TAIs maintain their forbidden status. This localized differentiation resolves the contradiction by maintaining security management simplicity while enabling legitimate access.
3Loss of information
If the UE stores all forbidden TAI information, then complete forbidden area data is maintained, but memory resources are wasted on irrelevant TAIs
Solution Approach 1:
The patent extracts only the relevant forbidden TAI information that belongs to the serving PLMN and stores it locally in the UE. By comparing PLMN-IDs and extracting only matching TAIs, the system maintains complete and accurate forbidden area data for the serving network while discarding irrelevant TAIs from other PLMNs, thereby optimizing memory resource utilization without losing critical security information.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate.