CQI and MCS Table Configuration for 4096 QAM Retransmission
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Solution Overview
Problem
Existing communication systems face challenges in efficiently supporting high-data-rate and low-latency services in mmWave and terahertz bands, particularly in managing channel quality and modulation schemes for 4096 quadrature amplitude modulation (QAM) to optimize data transmission.
Innovation Solution
A method and apparatus for generating and configuring modulation and coding scheme (MCS) tables and channel quality indicator (CQI) tables to support 4096 QAM, including methods for determining limited buffer rate matching (LBRM) and phase tracking reference signals (PT-RS), and using these tables for efficient data transmission and retransmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If 4096 QAM is supported to increase data transmission rates, then productivity is improved, but device complexity increases due to the need for new CQI and MCS tables and related configuration
Solution Approach 1:
The patent changes the modulation order parameter from traditional values (up to 256 QAM) to support 4096 QAM (modulation order 12). This requires defining new CQI tables with 17 entries (indices 0-16) and new MCS tables that accommodate the higher modulation order, enabling significantly increased data transmission rates while systematically managing the complexity through standardized parameter definitions
Solution Approach 2:
The patent segments the CQI table into multiple entries (17 entries indexed 0-16) with different modulation orders and code rates. Each entry represents a different transmission scenario, allowing the system to select appropriate parameters based on channel conditions. This segmentation manages complexity by breaking down the high-order modulation support into discrete, selectable configurations
2Manufacturing precision
If new CQI and MCS tables are configured to support 4096 QAM, then manufacturing precision is improved in terms of transmission optimization, but ease of operation deteriorates due to additional configuration requirements
Solution Approach 1:
The patent enables dynamic selection among different CQI table configurations through higher-layer signaling. The system can switch between traditional CQI tables and new 4096-QAM-supported CQI tables based on service requirements and channel conditions. This dynamic capability allows precise transmission optimization for 4096 QAM while maintaining operational flexibility through standardized switching mechanisms
Solution Approach 2:
The patent defines specific parameter ranges for 4096 QAM support including modulation order qm=12, and establishes corresponding relationships between CQI indices, modulation orders, and code rates in new CQI tables. These standardized parameter definitions enable precise transmission optimization while reducing operational complexity through consistent parameter management
3Reliability
If limited buffer rate matching and phase tracking reference signals are determined for 4096 QAM, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent establishes predetermined rules and configurations for limited buffer rate matching (LBRM) and phase tracking reference signals (PT-RS) specifically optimized for 4096 QAM. These preliminary configurations include specific mapping relationships, signal generation methods, and processing procedures that are defined in advance, ensuring reliable high-order modulation while managing complexity through standardized preliminary setups
Data Source
AI summary
The present disclosure relates to a communication system, such as a 5G or 6G communication system, capable of supporting higher data transmission rates. Methods and associated devices for transmitting information in a wireless communication system, according to embodiments of the present disclosure, include, but are not limited to, a method for configuring a CQI table, a method for configuring an MCS table, methods for determining related LBRM, PT-RS and system-supported maximum data rates, and a method for determining MCS for retransmission.