Code Block Grouping for Wireless Feedback Efficiency
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in retransmissions due to inadequate code block grouping methods for feedback reporting, leading to increased overhead and unnecessary retransmissions.
Innovation Solution
The method involves grouping code blocks into sets of code block groups of different sizes based on an indication, allowing for efficient feedback reporting through acknowledgments (ACK) or negative-acknowledgments (NACK) for each code block group, thereby optimizing retransmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If code blocks are grouped into larger code block groups for feedback reporting, then overhead is reduced, but measurement precision of decoding status deteriorates
Solution Approach 1:
The patent segments code blocks into multiple code block groups, where each group is assigned a unique group identifier. This segmentation allows the receiving device to report decoding status per group rather than per individual code block, reducing feedback overhead while maintaining sufficient precision through the group-level granularity and associated identifiers.
2Measurement precision
If code blocks are grouped into smaller code block groups for feedback reporting, then measurement precision of decoding status improves, but overhead increases
Solution Approach 1:
The patent introduces parameters such as group identifiers and code block group offsets to enable precise identification of code block groups without requiring feedback for every individual code block. These parameter changes allow the system to achieve fine-grained decoding status reporting while keeping feedback overhead manageable through efficient parameter encoding and usage.
3Measurement precision
If individual code block feedback is reported, then measurement precision of decoding status is maximized, but device complexity increases
Solution Approach 1:
The patent merges multiple code blocks into code block groups, where feedback for multiple code blocks is aggregated at the group level. This merging reduces device complexity by simplifying feedback processing and transmission, while the inclusion of group identifiers and offsets maintains the ability to precisely identify which specific code blocks within each group require retransmission.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A wireless device may transmit feedback, such as hybrid automatic repeat request (HARQ) feedback for groups of code blocks rather than for an entire transport block or individual code blocks. The wireless device may transmit an acknowledgement (ACK) or negative-acknowledgement (NACK) to provide feedback for each code block group of a set of code block groups. An ACK may indicate that code blocks in a code block group were successfully decoded, and a NACK may indicate that at least one code block in a code block group was not successfully decoded. Wireless devices may support several techniques for grouping code blocks for feedback reporting to allow for efficient retransmissions and limited overhead. Different grouping schemes may be employed depending on system constraints, device capability, link conditions, or the like.