RedCap Terminal Random Access with Multiple PUSCH Configurations
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently supporting terminals with reduced capability, such as RedCap UEs, in accessing and obtaining system information due to their limited performance compared to general smartphones, necessitating new methods for NR cell access and random access procedures.
Innovation Solution
A method and apparatus for RedCap UEs to receive System Information Block1 (SIB1) and perform random access procedures using specific configurations of search space 0 (SS #0) and control resource set 0 (CORESET #0) within the initial bandwidth part (IBWP), allowing them to determine if a cell is barred and initiate random access based on a second pusch-TimeDomainAllocationList.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If general terminal access procedures are used for RedCap UEs, then network compatibility is maintained, but access efficiency and performance are degraded due to limited RedCap capabilities
Solution Approach 1:
The patent segments the random access procedure into distinct phases: SIB1 reception using first SS0 and first CORESET0 configurations, followed by random access procedure using second SS0 and second CORESET0 configurations. This segmentation allows RedCap UEs to use simplified configurations appropriate for their capabilities while maintaining compatibility with the broader network infrastructure.
Solution Approach 2:
The patent applies local quality by providing different SS0 and CORESET0 configurations specifically tailored for RedCap UEs in certain cells, while other cells continue to use standard configurations. This allows network operators to optimize access procedures for RedCap UEs in specific locations without affecting the entire network, balancing compatibility with efficiency.
2Productivity
If simplified access procedures are implemented for RedCap UEs, then access efficiency is improved, but device complexity increases due to multiple configuration sets
Solution Approach 1:
The patent implements preliminary action by pre-configuring multiple SS0 and CORESET0 configuration sets in the network before RedCap UE access. The first configurations are prepared for SIB1 reception, and the second configurations are prepared for the random access procedure. This pre-preparation reduces the complexity burden on RedCap UEs during actual access, as they simply need to switch between pre-defined configurations rather than managing complex parameters dynamically.
3Loss of information
If standard SIB1 reception is used, then system information is obtained, but cell barring determination and random access efficiency are reduced for RedCap UEs
Solution Approach 1:
The patent segments the information reception and access procedures: first SS0 and first CORESET0 are dedicated to SIB1 reception and cell status determination, while second SS0 and second CORESET0 are dedicated to the random access procedure. This segmentation allows RedCap UEs to efficiently complete each phase with appropriate configurations, reducing overall access time while ensuring complete system information reception.
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, if the cell is not barred, random access procedure based at least in part on a second pusch-TimeDomainAllocationList.