Uplink Control Information Decoding via LLR Stream Segmentation
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Solution Overview
Problem
In high-speed communication networks like 4G and 5G, efficiently processing uplink transmissions is challenging due to the mixing of reference signals with data and uplink control information, requiring specialized processing to account for reference signals and provide efficient descrambling, combining, and decoding functions.
Innovation Solution
A decoding system that categorizes uplink control information into different categories using a resource element identifier, separates log-likelihood ratio streams, and decodes them using separate decoders to efficiently process and combine data and channel state information, enabling efficient processing of uplink control information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If reference signals are mixed with data in uplink transmissions, then spectral efficiency is improved, but processing complexity increases due to the need to account for reference signals during data processing
Solution Approach 1:
The patent segments the uplink transmission processing by separating reference signal handling from data processing. The receiver identifies reference signal resource elements and excludes them from data processing operations, dividing the complex mixed signal into manageable distinct components that can be processed independently
Solution Approach 2:
The patent extracts reference signals from the mixed uplink transmission by identifying their specific resource element locations. These extracted reference signals are then set to zero or excluded from subsequent data processing operations, isolating them from the data processing pipeline to reduce complexity
2Measurement precision
If separate processing functions are provided for descrambling, combining, and decoding, then processing accuracy is improved, but system complexity increases
Solution Approach 1:
The patent implements segmentation by creating distinct processing functions for descrambling, combining, and decoding operations. Each function handles a specific aspect of uplink control information processing, improving accuracy through specialized treatment while organizing complexity into modular manageable segments
Solution Approach 2:
The patent creates a universal processing framework that handles multiple types of uplink control information (ACK, CSI, SR) through a common set of processing functions. The same descrambling, combining, and decoding mechanisms are applied across different information types, reducing overall system complexity through reuse
Data Source
AI summary
Methods and apparatus for decoding received uplink transmissions. In an embodiment, a method includes receiving a stream having data LLRs and second channel state information (CSI2) LLRs, and separating the data LLRs into a data stream and the CSI2 LLRs into a CSI2 stream based on configuration parameters. The method also includes decoding the data stream to generate decoded data, and decoding the CSI2 stream to generate decoded CSI2 information. An apparatus includes a first LLR preprocessor that receives a stream having data LLRs and second channel state information (CSI2) LLRs and separates the data LLRs into a data stream, and a second LLR preprocessor that receives the stream and separates the CSI2 LLRs into a CSI2 stream. The apparatus also includes a data decoder that decodes the data stream to generate decoded data, and a CSI2 decoder that decodes the CSI2 stream to generate decoded CSI2 information.