UE NSSAI List Updates for Tracking Area Slice Availability
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing Network Slice Selection Assistance Information (NSSAI) lists, particularly when network slices have limited geographical availability that do not match tracking area boundaries, leading to inconsistent service access and inefficient resource utilization.
Innovation Solution
The proposed solution involves a method for managing NSSAI lists by deleting stored partially allowed NSSAI lists in user equipment (UE) based on signaling messages, ensuring that the UE updates its NSSAI lists according to new configurations or availability information, thereby optimizing service access and resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the UE maintains stored partially allowed NSSAI lists for all tracking areas, then service coverage is extended, but network resource utilization becomes inefficient and service access consistency deteriorates
Solution Approach 1:
The patent applies local quality by making the NSSAI list maintenance behavior location-dependent. The UE deletes stored partially allowed NSSAI lists specifically when it determines it is currently located in the tracking area where those lists are no longer valid, rather than maintaining them universally. This localized approach ensures service coverage is maintained where needed while avoiding unnecessary resource consumption in areas where the service is not available.
2Stability of the object's composition
If the UE deletes stored partially allowed NSSAI lists when tracking area changes, then service access consistency is improved, but service coverage may be interrupted during transitions
Solution Approach 1:
The patent implements preliminary action by having the UE proactively delete stored partially allowed NSSAI lists before or during the tracking area transition process, based on receiving indication information from the network. This提前 deletion prevents the UE from attempting to access services in tracking areas where they are not supported, ensuring service access consistency while the network coordinates the transition to maintain service continuity.
3Adaptability or versatility
If the UE stores multiple NSSAI lists for different access types and tracking areas, then service accessibility is enhanced, but device complexity and memory requirements increase
Solution Approach 1:
The patent applies discarding and recovering by implementing a dynamic lifecycle management strategy for NSSAI lists. The UE stores multiple NSSAI lists for different access types and tracking areas when needed, but systematically deletes them when transitioning to new tracking areas or when no longer required. This approach maintains service accessibility across different access types while reducing device complexity and memory usage by eliminating unnecessary list maintenance.
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 managing network slice selection assistance information (NSSAI) list in a wireless communication network. The method includes receiving, by a user equipment (UE), at least one signaling message from a network function entity. The method further includes determining, by the UE, whether at least one allowed NSSAI list is received for a network entity from the at least one signaling message. The method further includes deleting, by the UE, a stored allowed NSSAI list and a partially allowed NSSAI list for the network entity on determining no allowed NSSAI list is received from the at least one signaling message.