Non-Uniform Quantization Table for RSRP Reporting Accuracy
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Solution Overview
Problem
Current quantization methods for reporting Reference Signal Received Power (RSRP) in next-generation wireless communication networks result in significant quantization errors due to uniform distribution of RSRP values, leading to inefficient use of bits for less likely values and reduced accuracy in signal strength measurement.
Innovation Solution
Implementing a non-uniform quantization table that adapts quantization step sizes based on the distribution of RSRP values, using larger step sizes for smaller values and smaller step sizes for larger values, to minimize quantization errors and improve resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If uniform quantization is used for RSRP reporting, then the quantization process is simple and consistent, but the quantization error is large and accuracy is reduced
Solution Approach 1:
The patent applies local quality by using different quantization step sizes for different RSRP value ranges. Specifically, smaller step sizes (e.g., 1 dB) are used for larger RSRP values (−44 dBm to −84 dBm) where higher precision is needed, and larger step sizes (e.g., 2 dB) are used for smaller RSRP values (−86 dBm to −140 dBm) where lower precision is acceptable. This non-uniform quantization approach optimizes measurement accuracy for each local range while managing overall system complexity.
2Measurement precision
If more bits are used for quantization, then the RSRP measurement accuracy improves, but the reporting overhead increases
Solution Approach 1:
The patent changes the quantization parameter (step size) based on the RSRP value range. By using smaller step sizes for larger RSRP values and larger step sizes for smaller RSRP values, the system achieves better measurement accuracy for critical ranges while reducing the number of bits required for reporting less critical ranges, thus optimizing the trade-off between accuracy and overhead.
3Measurement precision
If non-uniform quantization is used, then the quantization error is reduced and accuracy improves, but the device complexity increases
Solution Approach 1:
The patent segments the RSRP measurement range into multiple sub-ranges (e.g., −44 dBm to −84 dBm and −86 dBm to −140 dBm), each with its own quantization step size. This segmentation allows the system to apply appropriate precision to each segment, reducing overall quantization error while keeping the quantization table manageable through structured organization of multiple smaller tables rather than one large complex table.
Data Source
AI summary
A user equipment (UE) is provided. The UE includes one or more non-transitory computer-readable media having computer-executable instructions embodied thereon and at least one processor coupled to the one or more non-transitory computer-readable media. The at least one processor is configured to execute the computer-executable instructions to perform following actions: obtain a first measured RSRP value; receive a first message from a base station; select a first quantization table from one or more quantization tables according to the first message, wherein the one or more quantization tables includes a non-uniform quantization table; convert the first measured RSRP value to a first quantized RSRP value according to the first quantization table; and send the first quantized RSRP value to the base station.