5G UE Network Slice Authentication Registration
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Solution Overview
Problem
In the 5G System (5GS), there is a lack of specific means and methods for managing information related to pending network slices during the network slice-specific authentication and authorization process, particularly in handling registration and de-registration requests from User Equipment (UE) to the core network.
Innovation Solution
The UE and core network apparatuses implement a method to handle registration and de-registration requests by ignoring or not including specific Network Slice Selection Assistance Information (NSSAI) when the cause value indicates unavailability in the current PLMN or registration area, ensuring proper management of network slice information during the authentication and authorization process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE processes all rejected NSSAI information from the core network, then the network slice management becomes comprehensive, but the UE complexity and processing overhead increase when not registered on the second access
Solution Approach 1:
The patent applies local quality by making the UE's processing behavior context-dependent based on access registration status. When not registered on the second access, the UE selectively ignores rejected NSSAI with cause value 51, while maintaining full processing when registered. This localized adaptation of processing quality resolves the contradiction between comprehensive management and reduced complexity.
2Loss of information
If the core network includes all cause values in rejection messages, then the network provides complete information to the UE, but the message size and information overhead increase
Solution Approach 1:
The patent extracts only the necessary cause value information from the rejection message based on the UE's access registration status. When the UE is not registered on the second access, the core network omits cause value 51 from rejected NSSAI information sent to the UE, reducing message overhead while maintaining information completeness for relevant cases.
3Productivity
If the UE ignores rejected NSSAI with cause value 51 when not registered on second access, then the processing efficiency improves, but the network slice authentication completeness may be compromised
Solution Approach 1:
The patent implements dynamic processing behavior that adapts to the UE's registration state. The UE dynamically adjusts whether to process rejected NSSAI information based on whether it is registered on the second access, optimizing processing efficiency when not registered while maintaining authentication completeness when registered. This dynamic adaptation resolves the contradiction between efficiency and reliability.
Data Source
AI summary
According to an aspect of the present invention, provided are a procedure and a communicator for initial registration of UE or periodic or mobility-based registration for achieving Network Slice Specific Authentication and Authorization in 5GS. Furthermore, a communicator for achieving a function related to Network Slice Specific Authentication and Authorization in 5GS is provided by providing Network Slice Specific Authentication and Authorization initiated by a network, a procedure, initiated by the network and initiated based on completion of the Network Slice Specific Authentication and Authorization, for changing a UE configuration, a de-registration procedure initiated by the network, and a communicator.