Core Network Selection Service Minimizing Multi-RAT Transitions
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Solution Overview
Problem
In 5G new radio (NR) standalone deployments, RAN spectrum limitations lead to inefficient transitions between NR SA mode and LTE/NR NSA mode, causing unnecessary core network traffic and data gaps due to differences in downlink and uplink coverage, which can result in a ping-pong effect as user equipment moves.
Innovation Solution
A core network selection service is implemented to configure cell selection and reselection procedures for multi-RAT RAN devices, providing a cell selection priority list and parameter values to ensure optimal network utilization by prioritizing cell types and triggering handovers based on measurements, thereby minimizing unnecessary core network traffic and improving resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If RAN spectrum limitations are addressed by pushing UE to operate in LTE/NR NSA mode, then data rate is improved, but core network transitions increase causing unnecessary traffic and data gaps
Solution Approach 1:
The network device provides cell selection priority information to the UE in advance, enabling the UE to pre-determine the optimal core network (5GC or EPC) before actual data transmission. This preliminary configuration prevents unnecessary core network transitions during operation, resolving the contradiction between maintaining high data rates and reducing core network traffic.
2Loss of energy
If cell selection procedures are optimized to minimize transitions, then core network traffic is reduced, but network configuration complexity increases
Solution Approach 1:
The patent applies different cell selection priority configurations to different UEs based on their specific conditions (supported core networks, current connections, etc.). Each UE receives customized priority information tailored to its local context, which minimizes core network transitions without requiring complex centralized control logic, thus resolving the contradiction between reducing traffic and maintaining configuration simplicity.
Data Source
AI summary
A method, a system, and a non-transitory storage medium are described in which a core network selection service is provided. The core network selection service may minimize end devices transitioning between core networks of a multi-radio access technology (RAT) radio access network (RAN) based on cell selection priority configurations. The cell selection priority configurations may be provisioned on the end device via control messaging, such as system information block messages. The core network selection service may manage the end devices when in idle mode and in a connected mode.