Transport Block Segmentation for Dummy-Bit-Free Turbo Encoding
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Solution Overview
Problem
In wireless communication systems, the segmentation of data blocks into code blocks for turbo coding often requires additional dummy bits due to size limitations of the internal interleaver, leading to reduced transmission efficiency, especially when data blocks are not segmented into uniformly sized code blocks.
Innovation Solution
A method and device that determine the number of code blocks for a transport block, attach cyclic redundancy checks (CRC) to each code block, and encode them using a turbo-encoder with an internal interleaver, ensuring the sum of each code block's length and CRC length matches the internal interleaver's block size, thereby avoiding the need for dummy bits and optimizing transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data blocks are segmented into code blocks for turbo coding, then error correction capability is improved, but transmission efficiency deteriorates due to the need for dummy bits
Solution Approach 1:
The patent changes the parameter of code block size to match specific values (40, 48, 56, 64, 72, 80, 88, 96 bits) that are multiples of the interleaver block size. This parameter adjustment eliminates the need for dummy bits while maintaining the error correction benefits of segmentation, thereby resolving the contradiction between reliability and transmission efficiency
Solution Approach 2:
The patent performs preliminary determination of the number of code blocks based on the transport block size and interleaver block size before actual encoding. This preliminary action ensures that code blocks are sized appropriately to fit the interleaver without requiring dummy bits, thus improving transmission efficiency while maintaining error correction capability
2Productivity
If code blocks are sized to fit the internal interleaver block size, then transmission efficiency is improved by eliminating dummy bits, but device complexity increases due to additional size determination steps
Solution Approach 1:
The patent performs preliminary determination of the number of code blocks using a simple formula: number of code blocks = ceiling(transport block size / interleaver block size). This preliminary calculation, performed before encoding, simplifies the overall process by avoiding the need for complex adjustments during encoding, thus improving transmission efficiency without significantly increasing device complexity
Solution Approach 2:
The patent changes the code block size parameter to match the interleaver block size (multiples of 40, 48, 56, 64, 72, 80, 88, 96 bits). This parameter alignment eliminates the need for dummy bits and simplifies the encoding process, improving transmission efficiency while maintaining manageable device complexity through standardized size values
3Adaptability or versatility
If non-uniform code block sizes are used, then adaptability to different transport block sizes is improved, but manufacturing precision deteriorates due to inconsistent encoding
Solution Approach 1:
The patent segments the transport block into multiple code blocks of uniform size, where each code block size is determined by the interleaver block size. This uniform segmentation provides adaptability to different transport block sizes through variable number of code blocks while maintaining encoding consistency, thus resolving the contradiction between adaptability and manufacturing precision
Solution Approach 2:
The patent enforces homogeneity in code block sizes by requiring all code blocks to have sizes that are multiples of the interleaver block size (40, 48, 56, 64, 72, 80, 88, 96 bits). This homogeneous sizing ensures consistent encoding across all code blocks while maintaining adaptability to different transport block sizes through the number of code blocks, thereby resolving the contradiction between adaptability and encoding consistency
Data Source
AI summary
A method and device for segmenting, CRC encoding and turbo encoding a CRC attached transport block.