Network Slice Registration Area Configuration for Mobility
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Solution Overview
Problem
Current wireless network technologies face challenges in managing network slice registration and mobility, particularly in scenarios where a single-network slice selection assistance information (S-NSSAI) is rejected in one tracking area but available in others, leading to inefficiencies in paging load and mobility registration update requests.
Innovation Solution
The system enhances the access and mobility management function (AMF) to configure registration areas (RAs) that include tracking areas (TAs) supporting S-NSSAIs not available in all TAs, allowing for dynamic addition of TAs for mobility or signaling purposes, even if a slice is not available in the added TA, and provides additional information elements for retrying slice registration upon TA/CAG changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network configures registration areas with tracking areas that support all required network slices, then network slice availability is improved, but device complexity and signaling overhead increase due to frequent mobility registration updates
Solution Approach 1:
The patent segments the network slice information by tracking area, allowing different TAs to support different subsets of network slices. The AMF maintains a mapping between TAs and supported S-NSSAIs, enabling UEs to register for available slices without requiring all TAs to support all slices, thus reducing unnecessary mobility registration updates.
Solution Approach 2:
The patent implements dynamic configuration of registration areas where the AMF can add or remove tracking areas from a UE's registration area based on the UE's mobility pattern and the availability of required network slices in those TAs. This dynamic adjustment optimizes the balance between slice availability and registration update frequency.
2Reliability
If the network rejects an S-NSSAI in one tracking area but it is available in others, then local network constraints are respected, but paging load increases due to incomplete slice information
Solution Approach 1:
The patent applies local quality by allowing each tracking area to have its own slice support characteristics. The AMF stores and manages the mapping between TAs and supported S-NSSAIs, enabling the network to respect local constraints in each TA while providing comprehensive slice information to UEs for optimal paging and mobility management.
3Measurement precision
If the network provides detailed tracking area slice availability information to user equipment, then slice selection accuracy is improved, but information overhead in signaling messages increases
Solution Approach 1:
The patent implements partial information provision where the AMF provides slice availability information for the UE's current registration area to the UE. This partial information is sufficient for the UE to make appropriate slice selections and mobility decisions without requiring complete information about all possible tracking areas, thus balancing accuracy with signaling overhead.
Data Source
AI summary
The present application relates to devices and components including apparatuses, systems, and methods for technologies for improving network slicing in wireless networks.