5G Rate Matching With Adaptive Soft Buffer Configuration
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing channel noise, fading, and inter-symbol interference, which degrade link performance and require improved methods for data transmission and soft buffer management to enhance reliability and throughput.
Innovation Solution
A method and apparatus for rate matching and soft buffer management in wireless communication systems, considering the terminal's decoding performance, to support various input lengths and code rates, and segment transport blocks using LDPC codes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If rate matching is performed without considering soft buffer size, then data transmission rate can be increased, but decoding performance deteriorates due to insufficient buffer management
Solution Approach 1:
The patent dynamically adjusts rate matching parameters based on the terminal's soft buffer size. The network side determines the soft buffer size of the terminal and configures rate matching parameters accordingly, changing the parameters from fixed to adaptive values that optimize both transmission rate and decoding performance for different buffer capacities.
Solution Approach 2:
The patent implements a feedback mechanism where the terminal reports its soft buffer size to the network side, and the network side uses this feedback information to configure appropriate rate matching parameters. This closed-loop feedback ensures that rate matching is performed considering the actual buffer capacity, maintaining decoding performance while maximizing transmission efficiency.
2Reliability
If soft buffer size is increased to improve decoding performance, then memory resources are consumed, but transmission efficiency decreases
Solution Approach 1:
The patent makes the rate matching process dynamic by adapting it to the terminal's actual soft buffer size. Instead of using a fixed conservative buffer allocation, the system dynamically adjusts the rate matching configuration based on real-time buffer status information, allowing optimal balance between reliability and efficiency for each terminal.
Solution Approach 2:
The patent changes the rate matching parameters based on the soft buffer size parameter. By configuring different rate matching parameters for different buffer sizes, the system optimizes transmission efficiency for each terminal's memory capacity while ensuring sufficient buffering for reliable decoding.
3Device complexity
If rate matching parameters are configured without considering terminal capabilities, then system complexity is reduced, but transmission reliability deteriorates
Solution Approach 1:
The patent performs preliminary determination of the terminal's soft buffer size before configuring rate matching parameters. The network side obtains buffer size information in advance and uses it to pre-configure appropriate rate matching parameters, ensuring transmission reliability is maintained from the outset without requiring complex real-time adjustments during transmission.
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AI summary
The present disclosure relates to a communication technique for convergence of a 5G communication system for supporting a higher data transmission rate beyond a 4G system with an IoT technology, and a system therefor. The present disclosure may be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart or connected cars, health care, digital education, retail business, security and safety-related services, etc.) on the basis of a 5G communication technology and an loT-related technology. The present disclosure relates to a method and an apparatus for performing rate matching and configuring a soft buffer in a wireless cellular communication system.