NR Code Block Segmentation Based on Code Rate and OVA Resources
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Solution Overview
Problem
Current wireless communication systems, particularly in new radio (NR) technology, face challenges in optimizing transport block delivery due to limitations in resource-based code block segmentation, which affects efficiency and reliability in multi-user scenarios.
Innovation Solution
The proposed solution involves resource-based code block segmentation, where the segmentation of transport blocks into code blocks is dependent on the code rate, allowing for optimized code block sizes based on available resources and desired coding gains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If code block segmentation is performed based on fixed maximum information block length, then decoding complexity is limited, but code rate optimization is restricted
Solution Approach 1:
The patent applies dynamics by making the code block segmentation adaptive rather than fixed. The code block size is dynamically determined based on the actual code rate of the transport block, allowing the system to optimize between decoding complexity and code rate efficiency for each specific transmission scenario.
Solution Approach 2:
The patent changes the parameter of code block size based on the code rate. By calculating the code block size as a function of the code rate (KB = ceil(TBS/Kmax) * Kmax where Kmax depends on the code rate), the system adapts the segmentation parameters to match the actual transmission conditions, resolving the contradiction between fixed complexity limits and flexible optimization.
2Productivity
If larger code block sizes are used, then data transmission efficiency is improved, but decoding latency increases
Solution Approach 1:
The patent dynamically adjusts code block sizes based on the code rate to optimize the trade-off between transmission efficiency and decoding latency. By making the code block size adaptive rather than fixed, the system can use larger blocks when appropriate for efficiency while avoiding excessive latency in scenarios where low code rate requires smaller effective blocks.
3Reliability
If code block size is reduced for low code rates, then coding gain is improved, but data transmission rate decreases
Solution Approach 1:
The patent changes the code block size parameter based on the code rate to optimize the trade-off between coding gain and transmission rate. The formula KB = ceil(TBS/Kmax(CR)) * Kmax(CR) ensures that for low code rates, appropriately sized blocks are used to achieve coding gain, while for higher code rates, larger blocks can be used to maintain transmission rate efficiency.
Data Source
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AI summary
Certain aspects of the present disclosure relate to methods and apparatus for optimizing delivery of a transport block (TB) using code rate and over the air resources dependent segmentation into code blocks for New Radio (NR). In order to improve reliability, either repetition or reduction of the code rate can be performed. Reduction of the code rate displays a gain with respect to repetition but increases the decoding complexity and therefore the transmission latency. Therefore, for low rate, it is suggested to limit the maximum code block size, and correspondingly the maximum amount of information to encode, in order to avoid that the decoder processes long code blocks. Based on the classical 3GPP LTE segmentation method, a method is built which performs segmentation of transport blocks into code blocks based on the number of resources available for transmission (also called over the air, OVA resources, based on which the transport block size is computed) and the code rate selected for transmission.