CQI Table Segmentation for Accurate 4096-QAM Reporting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems lack accurate methods for transmitting and receiving control information based on channel quality indicators (CQI) and modulation coding scheme (MCS) tables, leading to inaccurate channel quality reporting.
Innovation Solution
A method and device for generating and using a CQI and MCS table supporting 4096 quadrature amplitude modulation (QAM) in communication systems, including determining limited buffer rate matching and phase tracking reference signals, to enhance channel quality reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing CQI and MCS table methods are used, then device complexity is reduced, but measurement precision of channel quality reporting deteriorates
Solution Approach 1:
The CQI table is segmented into multiple subsets, each associated with different maximum modulation schemes (e.g., 256 QAM subset, 1024 QAM subset, 4096 QAM subset). This segmentation allows the system to select the appropriate subset based on the actual modulation scheme being used, thereby improving channel quality reporting accuracy without requiring a single overly complex table structure.
Solution Approach 2:
The system dynamically selects which CQI table subset to use based on the maximum modulation scheme configuration. The network can flexibly switch between different CQI table subsets (256 QAM, 1024 QAM, 4096 QAM) depending on channel conditions and service requirements, making the system adaptable while maintaining manageable table complexity through modular design.
2Productivity
If 4096 QAM is supported in CQI table, then productivity of data transmission is improved, but device complexity increases
Solution Approach 1:
The CQI table is divided into multiple subsets with different maximum modulation schemes. The 4096 QAM subset is separated from lower-order modulation subsets, allowing high-data-rate transmission when needed while maintaining simpler table structures for lower-order modulations. This segmentation enables the system to achieve high productivity (4096 QAM support) without permanently increasing device complexity, as the complex subset is only activated when required.
Solution Approach 2:
The system changes the parameter of maximum modulation scheme supported by the CQI table based on service requirements and channel conditions. By configuring different maximum modulation schemes (256, 1024, or 4096 QAM) for different CQI table subsets, the system can adaptively adjust its capability to match actual transmission needs, achieving high productivity when necessary while keeping device complexity manageable through parameter flexibility.
Data Source
AI summary
The disclosure relates to a fifth generation (5G) or sixth generation (6G) communication system for supporting a higher data transmission rate. A method performed by a terminal in a wireless communication system includes receiving, from a base station, channel state information (CSI) report configuration information including a channel quality indicator (CQI) table-related parameter, identifying a CQI table to be used based on the CQI table-related parameter, and transmitting, to the base station, a CQI index using the CQI table. A maximum modulation scheme of the CQI table is 4096 quadrature amplitude modulation (QAM).