MCS Mapping for Multi-Layer PUSCH Demodulation
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Solution Overview
Problem
Existing MCS mapping tables for DFT-s-OFDM waveforms in wireless communication systems are inadequate for multi-layer PUSCH transmissions, leading to reduced demodulation performance and compromised uplink coverage.
Innovation Solution
A method for determining MCS mapping information based on transmission parameter information and distinct mapping relationships for single-layer and multi-layer channels, using separate MCS mapping tables tailored for each scenario to enhance demodulation performance and coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single MCS mapping table is used for all transmission layers, then the system complexity is reduced, but the demodulation performance and uplink coverage are compromised
Solution Approach 1:
The patent segments the MCS mapping table into multiple distinct tables (first MCS mapping table for single-layer transmission, second MCS mapping table for multi-layer transmission). This segmentation allows each table to be optimized for its specific transmission scenario, improving demodulation performance and uplink coverage while maintaining manageable system complexity through structured organization.
2Reliability
If separate MCS mapping tables are used for single-layer and multi-layer transmissions, then the demodulation performance is improved, but the system complexity increases
Solution Approach 1:
The patent implements dynamic selection of MCS mapping tables based on the number of transmission layers. The terminal device determines which table to use (first or second) according to the transmission scenario, allowing the system to adaptively optimize performance for each specific case while maintaining a structured and manageable overall framework.
3Adaptability or versatility
If existing MCS mapping tables are used for multi-layer PUSCH transmission, then the system maintains backward compatibility, but the uplink coverage is reduced
Solution Approach 1:
The patent introduces a second MCS mapping table specifically designed for multi-layer PUSCH transmission scenarios. This segmentation enables optimized MCS selection for multi-layer transmissions, improving uplink coverage and demodulation performance while maintaining backward compatibility through the separate first MCS mapping table for single-layer transmissions.
Data Source
AI summary
Provided are a method for determining modulation and coding scheme (MCS) mapping information and a network device. The method is performed by a terminal device and the method includes: determining MCS information of a channel based on transmission parameter information and an MCS mapping relationship, wherein the MCS mapping relationship includes at least one of a first mapping relationship and a second mapping relationship. The first mapping relationship includes MCS information corresponding to a scenario where the transmission parameter information indicates that a number of transmission layers of the channel is 1. The second mapping relationship includes MCS information corresponding to a scenario where the transmission parameter information indicates that a number of transmission layers of the channel is greater than or equal to 2. The first mapping relationship is different from the second mapping relationship.