RedCap NR Cell Access via Second Initial Uplink BWP
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Solution Overview
Problem
Existing mobile communication systems face challenges in efficiently supporting terminals with reduced capability (RedCap UEs) due to their limited performance, necessitating new methods for accessing and obtaining system information in 5G networks.
Innovation Solution
A method and apparatus for RedCap UEs to receive System Information Block1 (SIB1) and perform random access procedures using a second initial uplink Bandwidth Part (BWP) configuration, utilizing search space 0 and control resource set 0 in the initial bandwidth part to access and receive necessary system information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing mobile communication systems use standard access procedures, then general terminals can access the network, but terminals with reduced capability (RedCap UEs) cannot efficiently access due to limited performance
Solution Approach 1:
The patent segments the initial uplink BWP into two distinct configurations: a first initial uplink BWP for normal UEs and a second initial uplink BWP specifically for RedCap UEs. This segmentation allows each terminal type to access the network using parameters optimized for its capabilities, resolving the contradiction between maintaining standard procedures and enabling RedCap access.
Solution Approach 2:
The patent applies local quality by providing differentiated BWP configurations tailored to specific terminal capabilities. RedCap UEs receive a second initial uplink BWP with parameters (subcarrier spacing, cyclic prefix length, resource allocation) specifically optimized for their reduced performance characteristics, while normal UEs continue using the first initial uplink BWP.
2Productivity
If RedCap UEs use standard BWP configurations, then they can access the network, but their limited performance causes access failures or inefficiencies
Solution Approach 1:
The patent changes key BWP parameters including subcarrier spacing, cyclic prefix length, and resource allocation patterns specifically for the second initial uplink BWP configured for RedCap UEs. These parameter adjustments optimize the access procedure for terminals with reduced processing capability and narrower bandwidth, simultaneously improving access efficiency and reliability.
3Adaptability or versatility
If the network supports multiple terminal types with different capabilities, then service coverage is expanded, but system complexity increases
Solution Approach 1:
The patent segments the BWP configuration space into distinct first and second initial uplink BWPs, each with clearly defined parameters optimized for specific terminal types. This structured segmentation allows the network to support multiple terminal capabilities while maintaining clear, manageable configuration rules that reduce system complexity.
Solution Approach 2:
The patent creates a universal framework where the first initial uplink BWP serves both normal UEs and RedCap UEs (which can fall back to it), while the second initial uplink BWP is specifically optimized for RedCap UEs. This multi-functional design allows flexible accommodation of different terminal types without requiring entirely separate systems.
Data Source
AI summary
A method and apparatus for accessing a NR cell in a mobile communication system are provided. Method for accessing a NR cell includes receiving in a first cell, by a terminal from a base station, a System Information Block1 (SIB1), determining, by the terminal, if the first cell is barred and performing by the terminal random access procedure based at least in part on a second initial uplink Bandwidth Part (BWP) configuration information.