Feedback Information Segmentation for Targeted Code Block Retransmission
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Solution Overview
Problem
In LTE systems, when a code block fails to be decoded, the entire Transport Block (TB) is retransmitted, leading to inefficient use of transmission resources and failing to meet the performance requirements of next-generation mobile communication systems.
Innovation Solution
A feedback information method is introduced, where the first bit length represents TB-level feedback response information, the second bit length represents target TB indication information, and code block group-level feedback response information is included, allowing for the retransmission of only the failed code block rather than the entire TB, optimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the entire TB is retransmitted when a code block fails to be decoded, then the transmission reliability is improved, but the transmission resource occupation increases
Solution Approach 1:
The feedback information is segmented into multiple parts: TB-level feedback response information (first bit length), target TB indication information (second bit length), and code block group-level feedback response information. This segmentation allows the system to identify and retransmit only the specific failed code blocks rather than the entire TB, thus maintaining reliability while reducing resource occupation.
2Reliability
If the entire TB is retransmitted when a code block fails to be decoded, then the data integrity is ensured, but the transmission efficiency decreases
Solution Approach 1:
The patent implements a multi-level feedback mechanism where the terminal sends detailed feedback information including TB-level response, target TB indication, and code block group-level response. This feedback enables the network side to accurately identify which specific code blocks failed decoding and retransmit only those portions, ensuring data integrity while significantly improving transmission efficiency by avoiding unnecessary retransmission of successfully decoded data.
3Measurement precision
If detailed feedback information is sent for each code block, then the retransmission precision is improved, but the feedback information complexity increases
Solution Approach 1:
The feedback information is divided into three distinct segments with specific bit lengths: TB-level feedback response information (first bit length indicating overall TB status), target TB indication information (second bit length identifying which TBs contain failed code blocks), and code block group-level feedback response information (indicating specific failed code blocks within target TBs). This structured segmentation achieves high retransmission precision while managing complexity through clear organization and standardized bit allocation for each segment.
Data Source
AI summary
The embodiments of the application provide feedback information sending or receiving methods, devices and a system, and relate to the field of communication. The method includes that: a first bit length is determined, the first bit length being a number of bits for representing Transport Block (TB)-level feedback response information; a second bit length is determined, the second bit length being a number of bits for representing target TB indication information; feedback information is generated according to the first bit length and the second bit length, the feedback information including the TB-level feedback response information, the target TB indication information and code block group-level feedback response information; and the feedback information is sent.