Adaptive SSB EPRE Configuration for Reduced-Capability UE Reception
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Solution Overview
Problem
The reduced capability NR devices (REDCAP) face challenges in signal reception due to reduced antenna bandwidth and capabilities, affecting their ability to meet the requirement of receiving synchronization signals within a ±8 dB energy per resource element (EPRE) range, which is necessary for network flexibility and compatibility with R15/16 terminals.
Innovation Solution
Configuring different synchronization signal blocks (SSBs) with varying energy per resource element (EPRE) difference parameter ranges between physical broadcast channels (PBCH) and synchronization signals for different types of user equipment (UE), including reduced capability UE and enhanced mobile broadband (eMBB) UE, to adapt to their respective reception capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a unified EPRE difference parameter range of ±8 dB is applied to all UE types, then network flexibility and compatibility with R15/16 terminals are improved, but reduced capability UE cannot meet the SSB reception requirement due to reduced antenna bandwidth and capabilities
Solution Approach 1:
The patent applies different EPRE difference parameter ranges to different UE types. Specifically, reduced capability UE is configured with a first EPRE difference parameter range that is narrower than the ±8 dB range used for other UE types. This local differentiation ensures that each UE type receives parameters optimized for its specific capabilities, allowing reduced capability UE to reliably receive SSB while other UE types continue to benefit from the broader range for network flexibility.
Solution Approach 2:
The patent segments the UE population into different types (reduced capability UE and other UE types) and applies different EPRE difference parameter ranges to each segment. This segmentation allows the network to tailor the SSB configuration to the specific capabilities of each UE type, ensuring that reduced capability UE can meet SSB reception requirements while maintaining compatibility with R15/16 terminals for other UE types.
2Reliability
If different EPRE difference parameter ranges are configured for different UE types, then SSB reception requirements for reduced capability UE are met, but network configuration complexity increases
Solution Approach 1:
The patent establishes predetermined EPRE difference parameter ranges for different UE types before actual SSB transmission. The network pre-configures the first EPRE difference parameter range for reduced capability UE and the second range (±8 dB) for other UE types. This preliminary configuration allows the network to automatically select the appropriate parameter range based on UE type identification, reducing the complexity of real-time decision-making while ensuring reliable SSB reception for reduced capability UE.
Data Source
AI summary
A parameter configuration method, an apparatus, a communication device, and a storage medium, where different synchronization signal blocks (SSB) are configured for different types of user equipment (UE), where, in the SSBs respectively associated with the different types of UE, energy per resource element (EPRE) difference parameter ranges between physical broadcast channels (PBCH) and synchronization signals are different.