Transport Block Sizing Aligned With Turbo Interleaver Blocks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, the segmentation of data blocks into code blocks for turbo encoding often requires the addition of dummy bits due to size limitations, leading to reduced transmission efficiency, especially when data block sizes do not match the internal interleaver size of the turbo code.
Innovation Solution
A method that determines the number of code blocks and maps a transport block to these code blocks, attaching a cyclic redundancy check (CRC) to each, and encoding them using a turbo-encoder with an internal interleaver, ensuring the sum of code block lengths and CRC lengths match predetermined interleaver block sizes, thereby avoiding the need for dummy bits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If data blocks are segmented into code blocks for turbo encoding, then the encoding can be implemented, but dummy bits must be added when data block sizes do not match interleaver size, reducing transmission efficiency
Solution Approach 1:
The patent determines transport block sizes based on the internal interleaver block size of the turbo code, establishing a direct relationship between the parameter (transport block size) and the encoder's structural parameter (interleaver block size). This ensures that segmented code blocks exactly match the interleaver size, eliminating the need for dummy bits and resolving the contradiction between implementation feasibility and transmission efficiency
Solution Approach 2:
The patent performs preliminary determination of transport block sizes before actual transmission, calculating sizes that are multiples of the interleaver block size. This advance planning ensures that segmentation will produce code blocks that perfectly fit the interleaver, preventing the need for dummy bit insertion and maintaining transmission efficiency
Data Source
AI summary
A method for performing, by a first device, channel coding of data to be transmitted to a second device, the method includes: determining a size of a transport block for the data; attaching a first cyclic redundancy check (CRC) code to the transport block having the determined size to produce a first CRC-attached transport block; and segmenting the first CRC-attached transport block into multiple code blocks, wherein the size of the transport block is determined from among a plurality of predetermined transport block sizes such that the multiple code blocks have a same size as each other.