PRACH Configuration for Reduced Capability UEs
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently configuring Physical Random Access Channel (PRACH) settings for reduced capability User Equipment (UE) devices, leading to potential communication disruptions and misalignment with legacy UE configurations.
Innovation Solution
The proposed solution involves transmitting configuration information from a wireless communication node to a reduced capability UE, which includes a dedicated PRACH configuration. This configuration considers the starting position of PRACH transmission occasions, initial UL bandwidth parts, and association patterns tailored for reduced capability UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a dedicated PRACH configuration is provided for reduced capability UEs, then network access efficiency is improved, but device complexity increases
Solution Approach 1:
The PRACH configuration is segmented into different types (first type for legacy UEs, second type for reduced capability UEs) with distinct parameters. This segmentation allows each UE type to have optimized configuration settings without requiring the other type to accommodate both sets of parameters, thereby improving network access efficiency for reduced capability UEs while maintaining manageable complexity through clear separation of concerns
Solution Approach 2:
Different PRACH configuration parameters are applied locally to different UE types based on their specific capabilities. Reduced capability UEs receive configurations tailored to their reduced bandwidth and antenna constraints, while legacy UEs continue to use traditional configurations. This local customization improves productivity for each UE type without requiring global system complexity increases
2Reliability
If PRACH configuration is optimized for reduced capability UEs, then communication reliability is improved, but ease of operation deteriorates
Solution Approach 1:
The invention changes specific PRACH parameters (such as bandwidth, frequency offsets, and association patterns) to match the capabilities of reduced capability UEs. By adjusting these parameters rather than redesigning the entire configuration system, communication reliability is improved for reduced capability UEs while the overall system remains operable with familiar configuration structures, thus maintaining ease of operation
Solution Approach 2:
The base station acts as an intermediary that automatically selects and assigns the appropriate PRACH configuration type based on the UE's capability indicators. This intermediary function shields network operators from the complexity of manually managing multiple configuration types, improving communication reliability through proper configuration assignment while maintaining ease of operation through automated management
3Adaptability or versatility
If different PRACH preamble sizes are used for different frequency ranges, then adaptability is improved, but device complexity increases
Solution Approach 1:
The PRACH configuration system is designed with multi-functionality to support both legacy UEs and reduced capability UEs across different frequency ranges (FR1 and FR2). By creating a universal configuration framework that can accommodate different UE types and frequency ranges through standardized parameter sets, the system achieves frequency range adaptability without requiring each device to handle multiple complex configuration scenarios, thus managing device complexity effectively
Data Source
AI summary
A system and method for signaling design and configuration are disclosed herein. In one embodiment, the system and method are configured to transmit, by a wireless communication node to a first wireless communication device, configuration information, wherein the first wireless communication device is a reduced capability user equipment device, and wherein the configuration information includes a Physical Random Access Channel configuration.