RedCap UE Cell Reselection Under Barred Cell Signaling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
RedCap UE devices face inefficiencies in access control procedures, including low access efficiency and excessive energy consumption, particularly when cells are barred and specific IFRI information is not sent, complicating cell reselection operations.
Innovation Solution
The solution involves the network device sending a master information block (MIB) with specific indication information to allow RedCap UE to determine intra-frequency reselection operations efficiently, even when a cell is barred, by including separate indication fields for cell barring and reselection permission, and designing behavior rules for when these specific fields are absent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the network device does not send specific IFRI information for RedCap UE, then the signaling overhead is reduced, but the terminal device cannot efficiently determine whether to perform cell reselection operation when cell is barred
Solution Approach 1:
The patent applies universality by making the existing cellBarred indication field serve dual purposes: it simultaneously indicates both cell barring status and intra-frequency reselection permission for RedCap UE. When the cellBarred field is set to 'barred', RedCap UE interprets this as both cell barring and prohibition of intra-frequency reselection, eliminating the need for separate IFRI information while maintaining clear operational guidance.
2Adaptability or versatility
If the terminal device performs cell reselection operation when cell is barred, then the access flexibility is improved, but the energy consumption increases
Solution Approach 1:
The patent enables self-service by allowing RedCap UE to autonomously determine cell reselection permission based on the cellBarred indication field without requiring additional network signaling. The terminal device itself interprets the cellBarred field to make reselection decisions, reducing unnecessary monitoring and processing operations that would consume energy while maintaining appropriate access flexibility.
3Manufacturing precision
If separate indication fields for cell barring and reselection permission are introduced, then the access control precision is improved, but the device complexity increases
Solution Approach 1:
The patent applies merging by combining the cell barring indication and intra-frequency reselection permission indication into a single cellBarred field. This consolidation maintains precise access control functionality while reducing the number of separate indication fields, thereby simplifying the overall message structure and reducing processing complexity compared to having separate fields.
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
Embodiments of this application provides a communication method, including: A terminal device receives a master information block MIB, where the MIB includes first indication information and second indication information, the first indication information indicates whether a cell is barred, and the second indication information indicates whether an intra-frequency reselection operation is allowed. When the first indication information indicates that the cell is barred, the terminal device determines, based on the second indication information, whether to perform the intra-frequency reselection operation. The terminal device is reduced capability user equipment RedCap UE. Based on this technical solution, the RedCap UE can use different IFRIs when the cell is barred, to improve efficiency of the terminal device to determine to perform a cell reselection operation.