Targeted Retransmission via Error Location Feedback
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Solution Overview
Problem
Current communication technologies rely on 1-bit feedback, limiting the transmit end's ability to perform targeted retransmissions and fully utilize the error correction and detection capabilities of the receive end, resulting in poor decoding and error correction performance.
Innovation Solution
The introduction of more detailed feedback information from the receive end allows the transmit end to send targeted retransmissions, including both sent and unsent coded bits, based on the location of decoding errors, thereby improving decoding and error correction performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If 1-bit feedback (ACK/NACK) is used, then feedback simplicity is maintained, but the transmit end cannot perform targeted retransmission and cannot fully utilize error correction capability
Solution Approach 1:
The patent segments the feedback information into multiple parts: a first feedback signal (ACK/NACK) indicating overall decoding status, and a second feedback signal providing detailed error location information. This segmentation allows the system to maintain simple overall feedback structure while adding targeted error correction capability through the additional segmented feedback signal.
Solution Approach 2:
The patent transitions from 1-bit feedback to multi-dimensional feedback by adding error location information to the traditional ACK/NACK feedback. This dimensional expansion enables the transmit end to identify specific erroneous code blocks and perform targeted retransmission, significantly improving decoding performance while maintaining feedback manageability through structured information organization.
2Reliability
If targeted retransmission based on error location is implemented, then decoding performance is improved, but feedback information complexity increases
Solution Approach 1:
The feedback information is segmented into two distinct components: the first feedback signal for overall status indication and the second feedback signal for error location details. This segmentation allows each component to serve its specific function efficiently, managing overall complexity while enabling targeted retransmission capability.
Solution Approach 2:
The patent applies partial feedback by providing error location information only when needed (when NACK is received), rather than continuously transmitting detailed feedback. This partial action approach reduces average feedback complexity while maintaining the capability for targeted retransmission when errors occur.
3Productivity
If retransmission of only unsent coded bits is performed, then transmission efficiency is maintained, but error correction capability is not fully utilized
Solution Approach 1:
The patent applies local quality by differentiating the treatment of different code blocks based on their error status. Instead of uniformly retransmitting all code blocks, the system identifies specific erroneous blocks through error location feedback and targets retransmission to those local areas, optimizing both efficiency and error correction utilization.
Solution Approach 2:
The patent employs feedback mechanisms where the receive end provides detailed error location information to the transmit end. This feedback enables the transmit end to adjust retransmission strategies by focusing resources on specific erroneous code blocks, thereby fully utilizing error correction capability while maintaining transmission efficiency through targeted rather than blanket retransmission.
Data Source
AI summary
Embodiments of this application provide an information transmission method and an apparatus. The transmit end sends a first coded bit sequence based on a to-be-transmitted coded bit sequence. The receive end receives and decodes a first to-be-decoded sequence, and sends first indication information if the decoding fails, where the first indication information includes information about a location, in the to-be-transmitted coded bit sequence, of at least one sent coded bit in the to-be-transmitted coded bit sequence. The transmit end receives the first indication information, and sends a second coded bit sequence based on the first indication information, where the second coded bit sequence includes the at least one sent coded bit in the to-be-transmitted coded bit sequence and/or at least one unsent coded bit in the to-be-transmitted coded bit sequence.