Selective Data Symbol Retransmission for Wireless Bandwidth Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional data retransmission methods in wireless communication often result in bandwidth wastage and increased transmission delays due to the retransmission of entire data blocks, even if only a portion of the data is incorrect.
Innovation Solution
A method and apparatus for retransmitting only the specific data symbols that are incorrect, determined through channel quality assessment using reference signals, allowing for precise identification and retransmission of faulty symbols, thereby reducing bandwidth usage and transmission delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the entire data block is retransmitted to ensure correct data recovery, then the reliability of data transmission is improved, but the bandwidth resource consumption increases
Solution Approach 1:
The patent segments the data block into multiple codeblock groups and further into individual codeblocks, enabling selective retransmission of only the erroneous codeblocks rather than retransmitting the entire data block. This segmentation allows the system to maintain reliability by ensuring correct data recovery while reducing bandwidth consumption by transmitting only the necessary portions.
Solution Approach 2:
The patent extracts and identifies specific erroneous codeblocks within the data block using CRC check results and mapping relationships. By taking out only the erroneous codeblocks for retransmission rather than the entire data block, the system achieves both reliable data recovery and reduced bandwidth resource consumption.
2Reliability
If the entire data block is retransmitted to ensure correct data recovery, then the reliability of data transmission is improved, but the transmission delay increases
Solution Approach 1:
The patent segments the data block into multiple codeblock groups and individual codeblocks, enabling selective retransmission of only the erroneous codeblocks. This segmentation reduces transmission delay by avoiding retransmission of already correct codeblocks while maintaining reliability through targeted error correction.
Solution Approach 2:
The patent extracts specific erroneous codeblocks identified through CRC checks and mapping relationships, retransmitting only these problematic portions. This extraction approach minimizes transmission delay by eliminating unnecessary retransmission of correct data while ensuring reliable data recovery.
3Reliability
If channel encoding is applied to the entire data block, then the error correction capability is improved, but the processing complexity increases
Solution Approach 1:
The patent divides the data block into multiple codeblock groups and individual codeblocks, applying channel encoding to smaller units rather than the entire data block. This segmentation reduces processing complexity while maintaining error correction capability by enabling targeted encoding and retransmission of only erroneous segments.
Solution Approach 2:
The patent applies different processing treatments to different codeblock groups based on their specific error status. By using local quality assessment through CRC checks and selective retransmission of only erroneous codeblocks, the system optimizes processing complexity while maintaining comprehensive error correction capability.
Data Source
AI summary
Embodiments of the present application disclose a data retransmission method, a data recovery method, and apparatuses thereof. The data retransmission method comprises: determining at least one data symbol that is to be retransmitted to a receiver; and sending the retransmitted at least one data symbol to the receiver. For the methods and the apparatuses in the embodiments of the present application, retransmission is performed for an incorrect symbol, so that a possible bandwidth waste can be reduced.