RedCap Random Access Configuration for Low-Power NR Initial Access
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Solution Overview
Problem
Existing 3GPP networks face challenges in efficiently managing initial access procedures for reduced-capability (redcap) NR devices due to their limited capabilities, leading to issues such as congestion, power consumption, and resource fragmentation, particularly in configuring initial DL/UL bandwidth parts and PUCCH frequency hopping.
Innovation Solution
The solution involves configuring redcap-specific initial DL/UL bandwidth parts, providing dedicated system information, and using early indications to reduce power consumption and improve resource efficiency by enabling/disabling PUCCH frequency hopping and orthogonal channel configurations for redcap and non-redcap UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If redcap devices use standard initial access procedures, then network compatibility is maintained, but power consumption increases and resource efficiency decreases
Solution Approach 1:
The patent segments the initial access procedure into distinct phases: redcap UEs perform random access using redcap-specific preambles in dedicated ROs, while non-redcap UEs use standard procedures. This segmentation allows redcap devices to follow a optimized path that reduces power consumption and improves resource efficiency without affecting other UEs.
Solution Approach 2:
The patent applies local quality by configuring redcap-specific parameters (dedicated ROs, redcap preambles, adjusted message timing) only for redcap UEs, while maintaining standard configurations for non-redcap UEs. This localized optimization ensures that redcap devices benefit from improved power efficiency and resource utilization without compromising network-wide compatibility.
2Productivity
If redcap-specific configurations are implemented, then resource efficiency improves, but system complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring redcap-specific parameters through dedicated system information blocks (SIBs) and random access RACH configurations before redcap UEs attempt initial access. The network pre-allocates dedicated ROs and redcap preambles, so redcap devices can immediately use these optimized resources without requiring complex runtime decisions, thereby improving resource efficiency while keeping implementation straightforward.
3Productivity
If dedicated random access resources are allocated for redcap UEs, then access efficiency improves, but network resource fragmentation increases
Solution Approach 1:
The patent applies dynamics by making the random access resource allocation flexible and adaptive. The network can dynamically configure the number, location, and timing of dedicated ROs for redcap UEs based on actual traffic conditions and network load. This dynamic configuration allows the system to optimize access efficiency for redcap devices while adapting resource allocation to minimize fragmentation, as resources can be adjusted rather than fixed statically.
Data Source
AI summary
The present application relates to devices and components including apparatus, systems, and methods for initial access and random access channel operations for reduced capability devices in wireless networks.