Transport Block Encoding for Wireless Systems
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Solution Overview
Problem
In LTE wireless communication systems, the existing methods for encoding transport blocks result in increased signaling overhead and inefficiencies, particularly in small cell environments, leading to suboptimal data transmission performance due to the need for dummy bits and inefficient channel coding processes.
Innovation Solution
A method and apparatus for encoding transport blocks by determining their size, dividing them into code blocks, interleaving these blocks, and performing turbo coding, where the size is based on the number of divided code blocks, thereby reducing the number of dummy bits and improving data transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transport block is divided into multiple code blocks for encoding, then the channel coding performance is improved, but the signaling overhead increases due to the need for dummy bits to align block sizes
Solution Approach 1:
The patent changes the parameter of transport block size determination by making it dependent on the number of code blocks. Instead of using a fixed or pre-determined block size that requires dummy bits for alignment, the system dynamically adjusts the transport block size based on the actual number of code blocks generated during division, thereby eliminating the need for dummy bits while maintaining optimal coding performance.
2Productivity
If the transport block size is increased to improve data transmission efficiency, then the number of transmissions is reduced, but the complexity of channel coding increases
Solution Approach 1:
The patent introduces dynamic adjustment of transport block size based on the number of code blocks. Rather than using a static or maximally sized transport block that increases coding complexity, the system adaptively determines the appropriate block size after code block division, balancing transmission efficiency with manageable coding complexity for each specific transmission scenario.
3Ease of manufacture
If dummy bits are added to align transport block size with coding requirements, then the encoding process is simplified, but the data transmission performance deteriorates
Solution Approach 1:
Instead of the conventional approach of adding dummy bits to reach a standard block size for simplified encoding, the patent inverts the logic by determining the transport block size based on the actual number of code blocks. This eliminates dummy bits entirely while maintaining encoding simplicity through the reverse determination approach.
Data Source
AI summary
A method for encoding a transport block in a wireless communication system, and a wireless apparatus therefore are discussed. The method according to one embodiment includes determining, at a transmitting device, a size of the transport block based on a size of an allocated resource, a number of layers, and modulation and coding scheme (MCS) for the transport block, wherein the size of the transport block is determined from among a plurality of predetermined sizes, wherein the plurality of the predetermined sizes include 305976 bits, 324336 bits, and 391656 bits when the transport block is mapped to four-layer spatial multiplexing and when 256 Quadrature amplitude modulation (QAM) is used for the transport block; and attaching at the transmitting device, a first cyclic redundancy check (CRC) code to the transport block to configure a first CRC-attached transport block.