Transport Block LLR Calculation Segmentation for CRC Failure
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Solution Overview
Problem
Wireless communication systems face inefficiencies in processing transport blocks that are likely to fail cyclic redundancy checks (CRC), leading to unnecessary resource consumption and potential re-transmission failures.
Innovation Solution
Implementing log likelihood ratio (LLR) calculations on specific parts of a transport block by user equipment (UE) to identify and transmit indications of failing CRC, allowing for optimized re-transmission configurations and resource conservation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If LLR calculations are performed on all parts of the transport block, then decoding accuracy is improved, but processing time and power consumption increase
Solution Approach 1:
The transport block is divided into multiple parts or segments. Instead of performing LLR calculations on the entire block, the system performs calculations only on selected segments that are identified as potentially containing errors or requiring re-transmission, thereby reducing overall processing time while maintaining decoding accuracy for critical portions
Solution Approach 2:
Different processing strategies are applied to different parts of the transport block based on their individual characteristics. High-priority or error-prone segments receive full LLR calculation treatment, while other segments use simplified processing, optimizing the balance between accuracy and efficiency
2Measurement precision
If LLR calculations are performed on all parts of the transport block, then decoding accuracy is improved, but power consumption increases
Solution Approach 1:
The transport block is segmented into multiple parts, and LLR calculations are performed only on specific segments that require error detection or re-transmission. This selective approach significantly reduces the computational power required compared to processing the entire block, while still maintaining adequate decoding accuracy for critical segments
Solution Approach 2:
Instead of performing complete LLR calculations on the entire transport block, the system performs partial calculations only on necessary segments. This partial action approach consumes less power while providing sufficient decoding accuracy for the most important parts of the data
3Reliability
If full transport block processing is performed, then error detection capability is improved, but network resource consumption increases
Solution Approach 1:
The system extracts and processes only the critical or error-prone portions of the transport block rather than the entire block. By taking out specific segments that need error detection and re-transmission handling, the system maintains reliable error detection capability while reducing the network resources consumed during processing and re-transmission
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a transport block (TB), the receiving the TB including performing log likelihood ratio (LLR) calculations on one or more parts of the TB based at least in part on a determination that the TB is likely to fail a cyclic redundancy check (CRC). The UE may transmit an indication of the one or more parts of the TB for which the UE performed LLR calculations. Numerous other aspects are described.