RedCap Cell Selection with Segmented Network Access Control
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Solution Overview
Problem
The deployment of a large number of reduced capability (RedCap) UEs leads to network capacity and performance loss, and existing methods fail to distinguish or limit access of RedCap UEs and non-RedCap UEs in a network.
Innovation Solution
A cell selection or reselection method and apparatus for RedCap UEs, involving the acquisition and determination of cell information to identify candidate cells and frequencies, and an information transmission method for network devices to indicate access states, allowing network operators to manage RedCap UE access effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a large number of RedCap UEs are deployed, then device coverage and service availability are improved, but network capacity and performance are degraded
Solution Approach 1:
The patent segments the network access by introducing separate indication information for RedCap UEs and non-RedCap UEs. The network device divides the cell access control into distinct pathways: one for RedCap UEs (with specific access restrictions and parameters) and another for non-RedCap UEs (with standard access procedures). This segmentation allows the network to support both device types simultaneously while preventing RedCap UE deployment from degrading overall network capacity.
2Productivity
If access control for RedCap UEs is implemented, then network capacity is maintained, but access complexity increases
Solution Approach 1:
The patent introduces indication information as an intermediary mechanism between the network device and RedCap UEs. This intermediary carries specific access control parameters (such as access restriction flags, barred status, and dedicated configuration indicators) that enable differentiated access control without requiring complex processing logic in either the network device or the UE. The indication information acts as a mediator that simplifies the access control implementation while maintaining network capacity.
3Reliability
If differentiated access for RedCap UEs and non-RedCap UEs is implemented, then service quality is improved, but information transmission overhead increases
Solution Approach 1:
The patent merges the differentiated access control information into existing system information blocks (SIBs) and random access response messages rather than creating separate dedicated signaling channels. The indication information for RedCap UEs is combined with standard access control information in the same message structures, allowing differentiated service quality control while minimizing additional information overhead. This merging approach ensures that both RedCap and non-RedCap UEs receive appropriate access control information without duplicating entire message sets.
Data Source
AI summary
A cell selection or reselection method, an information transmission method and apparatuses. The cell selection or reselection method includes: acquiring cell information by a terminal equipment, determining whether a first cell and/or a frequency of the first cell is/are a candidate cell and/or a candidate frequency in a process of cell selection and/or cell reselection of a reduced capability terminal equipment.