RedCap NR Cell Access Using a Second Initial Uplink BWP
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing mobile communication systems face challenges in efficiently supporting terminals with reduced capability (RedCap UEs) for MTC communication, requiring new methods for NR cell access and system information acquisition.
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 (SS #0) and control resource set 0 (CORESET #0) in the initial bandwidth part (IBWP) to obtain necessary system information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing mobile communication systems are used, then general smartphone performance is supported, but terminals with reduced capability (RedCap UEs) cannot efficiently access the network
Solution Approach 1:
The patent segments the initial uplink BWP into two distinct configurations: a first initial uplink BWP for general UEs and a second initial uplink BWP specifically for RedCap UEs. This segmentation allows the system to provide optimized resource allocation and access procedures tailored to the specific capabilities and requirements of RedCap terminals, thereby improving their network access efficiency while maintaining compatibility with general smartphones.
2Productivity
If a unified access method is used for all terminals, then system simplicity is maintained, but RedCap UEs experience inefficient access and operation
Solution Approach 1:
The patent applies local quality by configuring specific parameters (such as message size, power control settings, and resource allocation) differently for the second initial uplink BWP used by RedCap UEs, while maintaining the standard configuration for general UEs. This localized optimization allows RedCap terminals to achieve efficient access and operation with parameters adapted to their reduced capabilities, without requiring a complete overhaul of the access procedure for all terminals.
3Use of energy by moving object
If standard power control is applied to all terminals, then power management is simplified, but RedCap UEs cannot optimize their transmit power efficiently
Solution Approach 1:
The patent changes the power control parameters specifically for the second initial uplink BWP used by RedCap UEs, including adjusting the power control adjustment factors, target power levels, and pathloss compensation ratios. These parameter changes enable RedCap terminals to optimize their transmit power according to their reduced transmission capabilities and antenna configurations, improving energy efficiency while maintaining reliable communication links.
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.