Coding Unit Matrix Mapping for OFDM Symbol Adaptation
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Solution Overview
Problem
Current communication systems, particularly in the context of 3GPP's LTE and emerging New Radio (NR) standards, face challenges in efficiently performing error correction coding and decoding, especially in scenarios requiring enhanced Mobile BroadBand (eMBB), massive Machine Type Communication (mMTC), and Ultra Reliable and Low Latency Communication (URLLC).
Innovation Solution
The proposed solution involves a terminal apparatus and base station apparatus equipped with coding and decoding units that prioritize the mapping and reading of coded bits or transmission symbols based on the number of OFDM symbols, using either a time-axis or frequency-axis prioritization, to optimize error correction processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If coded bits are mapped to a matrix in a first-axis prioritized manner and read in a second-axis prioritized manner (or vice versa), then error correction performance is improved, but system complexity increases due to the need to determine reading priority based on OFDM symbol count
Solution Approach 1:
The patent applies dynamics by making the bit reading priority dynamic rather than fixed. The reading priority (first-axis or second-axis) is determined based on the number of OFDM symbols in the channel, allowing the system to adapt its decoding strategy to match the actual transmission conditions. This dynamic adjustment optimizes error correction performance for different channel configurations while managing system complexity through conditional logic.
2Productivity
If transmission symbols are mapped to a prescribed channel based on time-axis prioritization or frequency-axis prioritization, then communication efficiency is improved, but adaptability to different channel conditions decreases
Solution Approach 1:
The patent applies parameter changes by varying the mapping priority parameter (time-axis or frequency-axis) based on the number of OFDM symbols. When the number of OFDM symbols indicates favorable channel conditions, one mapping priority is selected; when conditions differ, the priority is switched. This parameter adjustment enables the system to maintain high communication efficiency across diverse channel conditions without requiring completely different mapping schemes.
Data Source
AI summary
An apparatus includes a coding unit configured to divide a transport block into one or more code blocks and generate coded bit(s) by coding the one or more code blocks, and a transmitter configured to transmit the coded bit(s) by using a channel, wherein multiplex bit(s) are given based on at least coupling of the coded bit(s) generated by coding of the one or more code blocks, the coding unit maps the multiplex bit(s) to a matrix in a first-axis prioritized manner and reads the multiplex bit(s) from the matrix in the first-axis prioritized manner or in a second-axis prioritized manner, and whether the first axis or the second axis is prioritized in a case that the multiplex bit(s) are read from the matrix is given based on at least the number of OFDM symbols of the channel.