Wireless Retransmission Using Error Pattern Feedback
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Solution Overview
Problem
Current wireless communication technologies face inefficiencies in data retransmission due to the limited feedback information, typically restricted to 1-bit ACK or NACK, leading to excessive transmission overheads.
Innovation Solution
The proposed method involves a sending device sending a first bit sequence to a receiving device, which then sends a second bit sequence back to determine the first error pattern. This error pattern is used to adaptively adjust the data amount of retransmitted data, reducing overheads and improving channel utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If 1-bit ACK/NACK feedback is used to determine retransmission, then feedback simplicity is maintained, but transmission overhead increases and channel utilization decreases
Solution Approach 1:
The patent applies feedback principle by having the receiving device send back not just ACK/NACK but actual error pattern information (second bit sequence) to the sending device. This enables the sending device to determine the specific error pattern and send targeted correction data rather than retransmitting entire packets, thus reducing transmission overhead while maintaining feedback simplicity through structured error pattern reporting.
Solution Approach 2:
The patent extracts only the essential error pattern information from the received data and sends back a compressed second bit sequence representing the error pattern rather than the entire received data. This extraction principle reduces the amount of feedback data needed while still enabling effective error correction, thereby reducing transmission overhead.
2Reliability
If full data retransmission is performed when decoding fails, then reliability is maintained, but transmission overhead increases
Solution Approach 1:
Instead of retransmitting the entire data packet, the patent extracts and sends only the specific error pattern information. The sending device uses this extracted error pattern to generate minimal correction data that targets only the erroneous bits, maintaining reliability while significantly reducing transmission overhead compared to full retransmission.
Solution Approach 2:
The patent changes the parameter being transmitted from full data packets to compressed error pattern representations. By transforming the retransmission content from complete data to error pattern descriptors, the system maintains the ability to correct errors reliably while reducing the transmission volume and overhead.
3Productivity
If error pattern-based adaptive retransmission is implemented, then channel utilization improves, but system complexity increases
Solution Approach 1:
The patent implements feedback by having the receiving device analyze the received data, determine the error pattern, and send this pattern information back to the sending device. This feedback loop enables adaptive retransmission where the sending device can针对性地 send only the correction data needed, improving channel utilization without requiring complex end-to-end system redesign.
Solution Approach 2:
The receiving device performs self-service by autonomously determining the error pattern from the received data and generating the appropriate feedback. This self-service capability reduces the need for complex centralized control mechanisms, allowing the system to achieve adaptive retransmission with moderate complexity increase.
Data Source
AI summary
This application provides an information transmission method and an apparatus. In the method, a sending device sends a first bit sequence to a receiving device. Optionally, the first bit sequence is an information bit sequence, or the first bit sequence is an information bit sequence obtained through first encoding. The sending device receives a second bit sequence from the receiving device. The sending device sends a first code block to the receiving device, where the first code block is obtained based on a first error pattern and a first check matrix. The first error pattern is determined based on the second bit sequence and the first bit sequence.