Polar Code Rate-Matching with Circular Buffer for Stable 5G Coding
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Solution Overview
Problem
Current error-correcting codes for 5G communication systems fail to provide stable performance across various scenarios such as enhanced mobile broadband, ultrareliable and low latency communication, and massive machine-type communications without increasing complexity, particularly in memory usage.
Innovation Solution
A polar code rate-matching method that involves selecting a mother code, configuring an interleaver, and using a circular buffer for efficient bit management, allowing for puncturing, shortening, and repetition operations while maintaining stable performance in LTE and 5G-NR systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional error-correcting codes are used for 5G communication scenarios, then system complexity increases, but performance stability across different scenarios deteriorates
Solution Approach 1:
The patent applies universality by designing a unified rate-matching framework that handles puncturing, shortening, and repetition operations through a single circular buffer structure. This multi-functional approach allows the same code structure to serve multiple 5G scenarios (eMBB, URLLC, mMTC) without requiring separate complex coding schemes for each scenario, thereby improving performance stability while controlling system complexity
Solution Approach 2:
The patent utilizes parameter changes by dynamically adjusting rate-matching parameters (such as buffer size, extraction patterns, and code rate) based on different 5G scenario requirements. By changing these parameters within a unified polar code framework rather than changing the entire coding structure, the system achieves adaptive performance across scenarios without proportionally increasing complexity
2Adaptability or versatility
If rate-matching operations (puncturing, shortening, repetition) are implemented, then adaptability to different scenarios improves, but system complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the rate-matching process into distinct operational modes (puncturing, shortening, repetition) that are managed through a unified circular buffer. Each operation segment handles specific scenario requirements independently, allowing the system to adapt to different 5G scenarios by selecting appropriate segments rather than implementing all operations simultaneously, thus improving adaptability while managing complexity
Solution Approach 2:
The circular buffer serves as an intermediary structure that mediates between the polar code encoder and the various rate-matching operations. This intermediary buffer absorbs the complexity of different rate-matching operations by providing a unified interface, allowing puncturing, shortening, and repetition to be implemented adaptively without directly increasing the complexity of the core encoding/decoding system
Data Source
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AI summary
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) are provided. The 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, healthcare, digital education, smart retail, security and safety services. The method and apparatus for polar coding and rate-matching are disclosed.