Cell Barring for RedCap UEs by Reception Mode
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Solution Overview
Problem
Current cellular network technologies face challenges in efficiently managing cell access for Reduced Capability (RedCap) user equipment (UE) with 1Rx and 2Rx branch capabilities, leading to unclear UE behavior and potential unauthorized access.
Innovation Solution
The proposed solution involves a method where RedCap UEs determine cell barring status based on specific barring indications (e.g., cellBarredRedCap1Rx, cellBarredRedCap2Rx) received from the network, considering their supported reception modes and frequency bands, to ensure deterministic UE behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cell barring indications are not differentiated by reception mode, then UE behavior becomes simpler, but unauthorized access occurs and network efficiency deteriorates
Solution Approach 1:
The cell barring indication is segmented into multiple independent indicators: cellBarredRedCap1Rx for 1-reception-branch UEs and cellBarredRedCap2Rx for 2-reception-branch UEs. This segmentation allows the network to independently control access for different UE capability groups, preventing unauthorized access by UEs with inappropriate reception branches while maintaining clear and manageable indication structures.
2Adaptability or versatility
If RedCap UEs can access any frequency band, then UE versatility is improved, but network congestion increases and performance deteriorates
Solution Approach 1:
Different cell barring indications are applied to different frequency bands based on network conditions and UE capabilities. 1-Rx UEs are directed to frequency bands where they can operate efficiently, while 2-Rx UEs are directed to different bands. This local differentiation of access control ensures that each UE type accesses appropriate frequency bands, preventing network congestion while maintaining UE versatility.
Data Source
AI summary
There is provided a method performed by a user equipment, the method comprising: supporting at least one of a first reception mode with only one receive (Rx) branch or a second reception mode with at least two Rx branches; detecting, from a network node associated with a cell, at least one of a first barring indication associated with the first reception mode or a second bar-ring indication associated with the second reception mode; determining whether a predetermined condition is met based on the supported at least one reception mode and at least one of the first barring indication and the second barring indication; and determining that the cell is barred for the user equipment when the predetermined condition is met.