5G Channel Coding with LDPC Segmentation for Variable Block Sizes
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Solution Overview
Problem
Current communication systems face challenges in efficiently transmitting data due to noise, fading, and inter-symbol interference, particularly in next-generation mobile communication systems requiring high data throughput and reliability, where existing error correcting codes are insufficient for variable length and rate requirements.
Innovation Solution
The implementation of a method and apparatus that utilizes Low-Density Parity-Check (LDPC) codes for data channel transmission, allowing for variable coding rates and lengths, and segments transport blocks and uplink control information into multiple polar code blocks for efficient channel coding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing error correcting codes are used, then basic communication reliability is maintained, but they cannot support variable length and rate requirements for next-generation systems
Solution Approach 1:
The patent segments transport blocks into multiple code blocks for independent encoding, allowing flexible adaptation to different transmission conditions and requirements while maintaining overall reliability through systematic error correction across segments
Solution Approach 2:
The patent implements dynamic coding rate adjustment by selecting different base graphs (BG1, BG2) and coding rates (1/3, 2/3, 3/4, 5/6, 6/7) based on channel conditions and service requirements, enabling the system to adapt between reliability and throughput needs
2Productivity
If high data throughput is achieved through advanced modulation and MIMO, then data rate increases, but susceptibility to noise and interference increases
Solution Approach 1:
The patent changes key parameters including base graph selection (BG1 for high throughput, BG2 for high reliability), coding rate adjustment, and transport block size configuration to optimize the balance between data throughput and noise resistance under different channel conditions
Solution Approach 2:
The system uses downlink control information to dynamically configure uplink transmission parameters based on channel quality feedback, allowing real-time adaptation to noise and interference conditions while maintaining high throughput when conditions permit
3Adaptability or versatility
If transport blocks are segmented into multiple code blocks, then flexibility and adaptability improve, but system complexity increases
Solution Approach 1:
The patent divides transport blocks into multiple code blocks that can be independently encoded and decoded, providing fine-grained control over error correction while distributing processing complexity across multiple manageable units
Solution Approach 2:
Different code blocks can use different base graphs and coding rates tailored to local channel conditions and service requirements, optimizing performance for each segment while maintaining overall system flexibility
Data Source
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AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A method by a terminal, a method by a base station, a terminal, and a base station in a wireless communication system are provided. The method by the terminal includes receiving from a base station downlink control information including modulation and coding scheme (MCS) information; identifying a first transport block size based on the downlink control information; and identifying a second transport block size based on the first transport block size and a transport block size candidate set, wherein the transport block size candidate set includes elements having an interval of a multiple of 8.