Network Slice Aware UE Frequency Band Selection
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Solution Overview
Problem
User equipment (UE) experiences connectivity issues and performance degradation due to camping on frequency bands that do not support the intended network slice, leading to unnecessary network congestion and power drain, as it is unaware of the frequency bands supporting the desired network slice.
Innovation Solution
The UE receives dedicated priority information from the network, which includes network slice-specific frequency band selection criteria, allowing it to perform targeted cell reselection and establish a protocol data unit (PDU) session with the correct network slice, and identifies the network slice causing paging messages to respond efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UE camps on a frequency band without network slice awareness, then the UE can camp on any available frequency band, but this causes unnecessary network congestion and UE power drain
Solution Approach 1:
The network provides dedicated priority information to the UE in advance, containing network slice-specific frequency band selection criteria. This preliminary information enables the UE to perform targeted cell reselection before attempting to access the network slice, avoiding unnecessary camping on unsupported frequency bands and reducing power consumption.
2Adaptability or versatility
If the UE camps on a frequency band without network slice awareness, then the UE has flexibility in frequency selection, but this leads to connectivity issues and performance degradation
Solution Approach 1:
The dedicated priority information contains network slice-specific frequency band selection criteria that are tailored to each network slice. This allows the UE to apply different selection rules for different network slices, ensuring reliable connectivity to the intended network slice while maintaining flexibility for other operations.
3Productivity
If the network provides dedicated priority information with network slice-specific frequency band selection criteria, then the UE can efficiently select the correct frequency band, but this increases network signaling overhead
Solution Approach 1:
The network provides dedicated priority information containing network slice-specific frequency band selection criteria to the UE in advance. This preliminary provisioning enables the UE to autonomously perform efficient cell reselection without requiring continuous network intervention, thereby improving productivity while limiting additional signaling overhead to the initial information provision.
Data Source
AI summary
A user equipment (UE) is configured to receive cell information including related frequency and network slice information. The UE receives network slice based dedicated priority information for the UE from a currently camped cell, selects a frequency band for camping based on a configured network slice and the network slice based dedicated priority information and establishes a protocol data unit (PDU) session with the configured network slice when camped on the frequency band.